-/* $Cambridge: exim/src/src/transports/smtp.c,v 1.35 2007/02/06 14:49:13 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2007 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
#include "../exim.h"
#include "smtp.h"
-#define PENDING 256
-#define PENDING_DEFER (PENDING + DEFER)
-#define PENDING_OK (PENDING + OK)
-
/* Options specific to the smtp transport. This transport also supports LMTP
over TCP/IP. The options must be in alphabetic order (note that "_" comes
to be publicly visible; these are flagged with opt_public. */
optionlist smtp_transport_options[] = {
+ { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public,
+ (void *)offsetof(transport_instance, expand_multi_domain) },
+ { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden,
+ (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) },
+
{ "address_retry_include_sender", opt_bool,
(void *)offsetof(smtp_transport_options_block, address_retry_include_sender) },
{ "allow_localhost", opt_bool,
(void *)offsetof(smtp_transport_options_block, allow_localhost) },
+#ifdef EXPERIMENTAL_ARC
+ { "arc_sign", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, arc_sign) },
+#endif
{ "authenticated_sender", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, authenticated_sender) },
{ "authenticated_sender_force", opt_bool,
(void *)offsetof(smtp_transport_options_block, connect_timeout) },
{ "connection_max_messages", opt_int | opt_public,
(void *)offsetof(transport_instance, connection_max_messages) },
+# ifdef SUPPORT_DANE
+ { "dane_require_tls_ciphers", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dane_require_tls_ciphers) },
+# endif
{ "data_timeout", opt_time,
(void *)offsetof(smtp_transport_options_block, data_timeout) },
{ "delay_after_cutoff", opt_bool,
(void *)offsetof(smtp_transport_options_block, delay_after_cutoff) },
-#ifdef EXPERIMENTAL_DOMAINKEYS
- { "dk_canon", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_canon) },
- { "dk_domain", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_domain) },
- { "dk_headers", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_headers) },
- { "dk_private_key", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_private_key) },
- { "dk_selector", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_selector) },
- { "dk_strict", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, dk_strict) },
+#ifndef DISABLE_DKIM
+ { "dkim_canon", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) },
+ { "dkim_domain", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) },
+ { "dkim_hash", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_hash) },
+ { "dkim_identity", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_identity) },
+ { "dkim_private_key", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) },
+ { "dkim_selector", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) },
+ { "dkim_sign_headers", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) },
+ { "dkim_strict", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) },
+ { "dkim_timestamps", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dkim.dkim_timestamps) },
#endif
{ "dns_qualify_single", opt_bool,
(void *)offsetof(smtp_transport_options_block, dns_qualify_single) },
{ "dns_search_parents", opt_bool,
(void *)offsetof(smtp_transport_options_block, dns_search_parents) },
+ { "dnssec_request_domains", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dnssec.request) },
+ { "dnssec_require_domains", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dnssec.require) },
+ { "dscp", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, dscp) },
{ "fallback_hosts", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, fallback_hosts) },
{ "final_timeout", opt_time,
(void *)offsetof(smtp_transport_options_block, final_timeout) },
{ "gethostbyname", opt_bool,
(void *)offsetof(smtp_transport_options_block, gethostbyname) },
- #ifdef SUPPORT_TLS
- { "gnutls_require_kx", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, gnutls_require_kx) },
- { "gnutls_require_mac", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, gnutls_require_mac) },
- { "gnutls_require_protocols", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, gnutls_require_proto) },
- #endif
{ "helo_data", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, helo_data) },
{ "hosts", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) },
{ "hosts_avoid_pipelining", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) },
- #ifdef SUPPORT_TLS
+#ifdef SUPPORT_TLS
{ "hosts_avoid_tls", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) },
- #endif
+#endif
{ "hosts_max_try", opt_int,
(void *)offsetof(smtp_transport_options_block, hosts_max_try) },
{ "hosts_max_try_hardlimit", opt_int,
(void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) },
- #ifdef SUPPORT_TLS
+#ifdef SUPPORT_TLS
{ "hosts_nopass_tls", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) },
- #endif
+ { "hosts_noproxy_tls", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) },
+#endif
{ "hosts_override", opt_bool,
(void *)offsetof(smtp_transport_options_block, hosts_override) },
{ "hosts_randomize", opt_bool,
(void *)offsetof(smtp_transport_options_block, hosts_randomize) },
+#if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP)
+ { "hosts_request_ocsp", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) },
+#endif
{ "hosts_require_auth", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_require_auth) },
- #ifdef SUPPORT_TLS
+#ifdef SUPPORT_TLS
+# ifdef SUPPORT_DANE
+ { "hosts_require_dane", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_require_dane) },
+# endif
+# ifndef DISABLE_OCSP
+ { "hosts_require_ocsp", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) },
+# endif
{ "hosts_require_tls", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_require_tls) },
- #endif
+#endif
{ "hosts_try_auth", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_try_auth) },
+ { "hosts_try_chunking", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) },
+#if defined(SUPPORT_TLS) && defined(SUPPORT_DANE)
+ { "hosts_try_dane", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_try_dane) },
+#endif
+ { "hosts_try_fastopen", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) },
+#ifndef DISABLE_PRDR
+ { "hosts_try_prdr", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) },
+#endif
+#ifdef SUPPORT_TLS
+ { "hosts_verify_avoid_tls", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) },
+#endif
{ "interface", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, interface) },
{ "keepalive", opt_bool,
(void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) },
{ "max_rcpt", opt_int | opt_public,
(void *)offsetof(transport_instance, max_addresses) },
- { "multi_domain", opt_bool | opt_public,
+ { "multi_domain", opt_expand_bool | opt_public,
(void *)offsetof(transport_instance, multi_domain) },
{ "port", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, port) },
{ "protocol", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, protocol) },
- { "retry_include_ip_address", opt_bool,
+ { "retry_include_ip_address", opt_expand_bool,
(void *)offsetof(smtp_transport_options_block, retry_include_ip_address) },
{ "serialize_hosts", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, serialize_hosts) },
{ "size_addition", opt_int,
(void *)offsetof(smtp_transport_options_block, size_addition) }
- #ifdef SUPPORT_TLS
+#ifdef SUPPORT_SOCKS
+ ,{ "socks_proxy", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, socks_proxy) }
+#endif
+#ifdef SUPPORT_TLS
,{ "tls_certificate", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, tls_certificate) },
{ "tls_crl", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, tls_crl) },
+ { "tls_dh_min_bits", opt_int,
+ (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) },
{ "tls_privatekey", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, tls_privatekey) },
- { "tls_require_ciphers", opt_stringptr,
+ { "tls_require_ciphers", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, tls_require_ciphers) },
+ { "tls_sni", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, tls_sni) },
{ "tls_tempfail_tryclear", opt_bool,
(void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) },
+ { "tls_try_verify_hosts", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) },
+ { "tls_verify_cert_hostnames", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)},
{ "tls_verify_certificates", opt_stringptr,
- (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }
- #endif
+ (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) },
+ { "tls_verify_hosts", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) },
+#endif
+#ifdef SUPPORT_I18N
+ { "utf8_downconvert", opt_stringptr,
+ (void *)offsetof(smtp_transport_options_block, utf8_downconvert) },
+#endif
};
/* Size of the options list. An extern variable has to be used so that its
address can appear in the tables drtables.c. */
-int smtp_transport_options_count =
- sizeof(smtp_transport_options)/sizeof(optionlist);
+int smtp_transport_options_count = nelem(smtp_transport_options);
+
+
+#ifdef MACRO_PREDEF
+
+/* Dummy values */
+smtp_transport_options_block smtp_transport_option_defaults = {0};
+void smtp_transport_init(transport_instance *tblock) {}
+BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;}
+void smtp_transport_closedown(transport_instance *tblock) {}
+
+#else /*!MACRO_PREDEF*/
+
/* Default private options block for the smtp transport. */
smtp_transport_options_block smtp_transport_option_defaults = {
- NULL, /* hosts */
- NULL, /* fallback_hosts */
- NULL, /* hostlist */
- NULL, /* fallback_hostlist */
- NULL, /* authenticated_sender */
- US"$primary_hostname", /* helo_data */
- NULL, /* interface */
- NULL, /* port */
- US"smtp", /* protocol */
- NULL, /* serialize_hosts */
- NULL, /* hosts_try_auth */
- NULL, /* hosts_require_auth */
- NULL, /* hosts_require_tls */
- NULL, /* hosts_avoid_tls */
- NULL, /* hosts_avoid_pipelining */
- NULL, /* hosts_avoid_esmtp */
- NULL, /* hosts_nopass_tls */
- 5*60, /* command_timeout */
- 5*60, /* connect_timeout; shorter system default overrides */
- 5*60, /* data timeout */
- 10*60, /* final timeout */
- 1024, /* size_addition */
- 5, /* hosts_max_try */
- 50, /* hosts_max_try_hardlimit */
- TRUE, /* address_retry_include_sender */
- FALSE, /* allow_localhost */
- FALSE, /* authenticated_sender_force */
- FALSE, /* gethostbyname */
- TRUE, /* dns_qualify_single */
- FALSE, /* dns_search_parents */
- TRUE, /* delay_after_cutoff */
- FALSE, /* hosts_override */
- FALSE, /* hosts_randomize */
- TRUE, /* keepalive */
- FALSE, /* lmtp_ignore_quota */
- TRUE /* retry_include_ip_address */
- #ifdef SUPPORT_TLS
- ,NULL, /* tls_certificate */
- NULL, /* tls_crl */
- NULL, /* tls_privatekey */
- NULL, /* tls_require_ciphers */
- NULL, /* gnutls_require_kx */
- NULL, /* gnutls_require_mac */
- NULL, /* gnutls_require_proto */
- NULL, /* tls_verify_certificates */
- TRUE /* tls_tempfail_tryclear */
- #endif
- #ifdef EXPERIMENTAL_DOMAINKEYS
- ,NULL, /* dk_canon */
- NULL, /* dk_domain */
- NULL, /* dk_headers */
- NULL, /* dk_private_key */
- NULL, /* dk_selector */
- NULL /* dk_strict */
- #endif
+ .hosts = NULL,
+ .fallback_hosts = NULL,
+ .hostlist = NULL,
+ .fallback_hostlist = NULL,
+ .helo_data = US"$primary_hostname",
+ .interface = NULL,
+ .port = NULL,
+ .protocol = US"smtp",
+ .dscp = NULL,
+ .serialize_hosts = NULL,
+ .hosts_try_auth = NULL,
+ .hosts_require_auth = NULL,
+ .hosts_try_chunking = US"*",
+#ifdef SUPPORT_DANE
+ .hosts_try_dane = NULL,
+ .hosts_require_dane = NULL,
+ .dane_require_tls_ciphers = NULL,
+#endif
+ .hosts_try_fastopen = NULL,
+#ifndef DISABLE_PRDR
+ .hosts_try_prdr = US"*",
+#endif
+#ifndef DISABLE_OCSP
+ .hosts_request_ocsp = US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */
+ .hosts_require_ocsp = NULL,
+#endif
+ .hosts_require_tls = NULL,
+ .hosts_avoid_tls = NULL,
+ .hosts_verify_avoid_tls = NULL,
+ .hosts_avoid_pipelining = NULL,
+ .hosts_avoid_esmtp = NULL,
+#ifdef SUPPORT_TLS
+ .hosts_nopass_tls = NULL,
+ .hosts_noproxy_tls = US"*",
+#endif
+ .command_timeout = 5*60,
+ .connect_timeout = 5*60,
+ .data_timeout = 5*60,
+ .final_timeout = 10*60,
+ .size_addition = 1024,
+ .hosts_max_try = 5,
+ .hosts_max_try_hardlimit = 50,
+ .address_retry_include_sender = TRUE,
+ .allow_localhost = FALSE,
+ .authenticated_sender_force = FALSE,
+ .gethostbyname = FALSE,
+ .dns_qualify_single = TRUE,
+ .dns_search_parents = FALSE,
+ .dnssec = { .request=NULL, .require=NULL },
+ .delay_after_cutoff = TRUE,
+ .hosts_override = FALSE,
+ .hosts_randomize = FALSE,
+ .keepalive = TRUE,
+ .lmtp_ignore_quota = FALSE,
+ .expand_retry_include_ip_address = NULL,
+ .retry_include_ip_address = TRUE,
+#ifdef SUPPORT_SOCKS
+ .socks_proxy = NULL,
+#endif
+#ifdef SUPPORT_TLS
+ .tls_certificate = NULL,
+ .tls_crl = NULL,
+ .tls_privatekey = NULL,
+ .tls_require_ciphers = NULL,
+ .tls_sni = NULL,
+ .tls_verify_certificates = US"system",
+ .tls_dh_min_bits = EXIM_CLIENT_DH_DEFAULT_MIN_BITS,
+ .tls_tempfail_tryclear = TRUE,
+ .tls_verify_hosts = NULL,
+ .tls_try_verify_hosts = US"*",
+ .tls_verify_cert_hostnames = US"*",
+#endif
+#ifdef SUPPORT_I18N
+ .utf8_downconvert = NULL,
+#endif
+#ifndef DISABLE_DKIM
+ .dkim =
+ {.dkim_domain = NULL,
+ .dkim_identity = NULL,
+ .dkim_private_key = NULL,
+ .dkim_selector = NULL,
+ .dkim_canon = NULL,
+ .dkim_sign_headers = NULL,
+ .dkim_strict = NULL,
+ .dkim_hash = US"sha256",
+ .dkim_timestamps = NULL,
+ .dot_stuffed = FALSE,
+ .force_bodyhash = FALSE,
+# ifdef EXPERIMENTAL_ARC
+ .arc_signspec = NULL,
+# endif
+ },
+# ifdef EXPERIMENTAL_ARC
+ .arc_sign = NULL,
+# endif
+#endif
};
+/* some DSN flags for use later */
+
+static int rf_list[] = {rf_notify_never, rf_notify_success,
+ rf_notify_failure, rf_notify_delay };
+
+static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" };
+
+
/* Local statics */
-static uschar *smtp_command; /* Points to last cmd for error messages */
-static uschar *mail_command; /* Points to MAIL cmd for error messages */
-static BOOL update_waiting; /* TRUE to update the "wait" database */
+static uschar *smtp_command; /* Points to last cmd for error messages */
+static uschar *mail_command; /* Points to MAIL cmd for error messages */
+static uschar *data_command = US""; /* Points to DATA cmd for error messages */
+static BOOL update_waiting; /* TRUE to update the "wait" database */
+
+/*XXX move to smtp_context */
+static BOOL pipelining_active; /* current transaction is in pipe mode */
/*************************************************
/* Pass back options if required. This interface is getting very messy. */
-if (tf != NULL)
+if (tf)
{
tf->interface = ob->interface;
tf->port = ob->port;
list. */
if (!testflag(addrlist, af_local_host_removed))
- {
- for (; addrlist != NULL; addrlist = addrlist->next)
- if (addrlist->fallback_hosts == NULL)
- addrlist->fallback_hosts = ob->fallback_hostlist;
- }
+ for (; addrlist; addrlist = addrlist->next)
+ if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist;
return OK;
}
/* Set the default port according to the protocol */
if (ob->port == NULL)
- ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" : US"smtp";
+ ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" :
+ (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp";
/* Set up the setup entry point, to be called before subprocesses for this
transport. */
msg to put in each address's message field
rc to put in each address's transport_return field
pass_message if TRUE, set the "pass message" flag in the address
+ host if set, mark addrs as having used this host
+ smtp_greeting from peer
+ helo_response from peer
If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in
the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate
static void
set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc,
- BOOL pass_message)
+ BOOL pass_message, host_item * host
+#ifdef EXPERIMENTAL_DSN_INFO
+ , const uschar * smtp_greeting, const uschar * helo_response
+#endif
+ )
{
address_item *addr;
int orvalue = 0;
errno_value = ETIMEDOUT;
orvalue = RTEF_CTOUT;
}
-for (addr = addrlist; addr != NULL; addr = addr->next)
- {
- if (addr->transport_return < PENDING) continue;
- addr->basic_errno = errno_value;
- addr->more_errno |= orvalue;
- if (msg != NULL)
+for (addr = addrlist; addr; addr = addr->next)
+ if (addr->transport_return >= PENDING)
{
- addr->message = msg;
- if (pass_message) setflag(addr, af_pass_message);
+ addr->basic_errno = errno_value;
+ addr->more_errno |= orvalue;
+ if (msg)
+ {
+ addr->message = msg;
+ if (pass_message) setflag(addr, af_pass_message);
+ }
+ addr->transport_return = rc;
+ if (host)
+ {
+ addr->host_used = host;
+#ifdef EXPERIMENTAL_DSN_INFO
+ if (smtp_greeting)
+ {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';}
+ addr->smtp_greeting = smtp_greeting;
+
+ if (helo_response)
+ {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';}
+ addr->helo_response = helo_response;
+#endif
+ }
}
- addr->transport_return = rc;
- }
}
+static void
+set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc,
+ BOOL pass_message)
+{
+set_errno(addrlist, errno_value, msg, rc, pass_message, NULL
+#ifdef EXPERIMENTAL_DSN_INFO
+ , NULL, NULL
+#endif
+ );
+}
/*************************************************
more_errno from the top address for use with ERRNO_FILTER_FAIL
buffer the SMTP response buffer
yield where to put a one-digit SMTP response code
- message where to put an errror message
+ message where to put an error message
pass_message set TRUE if message is an SMTP response
Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE
*/
-static BOOL check_response(host_item *host, int *errno_value, int more_errno,
+static BOOL
+check_response(host_item *host, int *errno_value, int more_errno,
uschar *buffer, int *yield, uschar **message, BOOL *pass_message)
{
-uschar *pl = US"";
-
-if (smtp_use_pipelining &&
- (Ustrcmp(smtp_command, "MAIL") == 0 ||
- Ustrcmp(smtp_command, "RCPT") == 0 ||
- Ustrcmp(smtp_command, "DATA") == 0))
- pl = US"pipelined ";
+uschar * pl = pipelining_active ? US"pipelined " : US"";
+const uschar * s;
*yield = '4'; /* Default setting is to give a temporary error */
-/* Handle response timeout */
-
-if (*errno_value == ETIMEDOUT)
- {
- *message = US string_sprintf("SMTP timeout while connected to %s [%s] "
- "after %s%s", host->name, host->address, pl, smtp_command);
- if (transport_count > 0)
- *message = US string_sprintf("%s (%d bytes written)", *message,
- transport_count);
- return FALSE;
- }
-
-/* Handle malformed SMTP response */
-
-if (*errno_value == ERRNO_SMTPFORMAT)
- {
- uschar *malfresp = string_printing(buffer);
- while (isspace(*malfresp)) malfresp++;
- if (*malfresp == 0)
- *message = string_sprintf("Malformed SMTP reply (an empty line) from "
- "%s [%s] in response to %s%s", host->name, host->address, pl,
- smtp_command);
- else
- *message = string_sprintf("Malformed SMTP reply from %s [%s] in response "
- "to %s%s: %s", host->name, host->address, pl, smtp_command, malfresp);
- return FALSE;
- }
-
-/* Handle a failed filter process error; can't send QUIT as we mustn't
-end the DATA. */
-
-if (*errno_value == ERRNO_FILTER_FAIL)
- {
- *message = US string_sprintf("transport filter process failed (%d)%s",
- more_errno,
- (more_errno == EX_EXECFAILED)? ": unable to execute command" : "");
- return FALSE;
- }
-
-/* Handle a failed add_headers expansion; can't send QUIT as we mustn't
-end the DATA. */
-
-if (*errno_value == ERRNO_CHHEADER_FAIL)
- {
- *message =
- US string_sprintf("failed to expand headers_add or headers_remove: %s",
- expand_string_message);
- return FALSE;
- }
-
-/* Handle failure to write a complete data block */
-
-if (*errno_value == ERRNO_WRITEINCOMPLETE)
+switch(*errno_value)
{
- *message = US string_sprintf("failed to write a data block");
- return FALSE;
+ case ETIMEDOUT: /* Handle response timeout */
+ *message = US string_sprintf("SMTP timeout after %s%s",
+ pl, smtp_command);
+ if (transport_count > 0)
+ *message = US string_sprintf("%s (%d bytes written)", *message,
+ transport_count);
+ return FALSE;
+
+ case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */
+ s = string_printing(buffer);
+ while (isspace(*s)) s++;
+ *message = *s == 0
+ ? string_sprintf("Malformed SMTP reply (an empty line) "
+ "in response to %s%s", pl, smtp_command)
+ : string_sprintf("Malformed SMTP reply in response to %s%s: %s",
+ pl, smtp_command, s);
+ return FALSE;
+
+ case ERRNO_FILTER_FAIL: /* Handle a failed filter process error;
+ can't send QUIT as we mustn't end the DATA. */
+ *message = string_sprintf("transport filter process failed (%d)%s",
+ more_errno,
+ more_errno == EX_EXECFAILED ? ": unable to execute command" : "");
+ return FALSE;
+
+ case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion;
+ can't send QUIT as we mustn't end the DATA. */
+ *message =
+ string_sprintf("failed to expand headers_add or headers_remove: %s",
+ expand_string_message);
+ return FALSE;
+
+ case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */
+ *message = string_sprintf("failed to write a data block");
+ return FALSE;
+
+#ifdef SUPPORT_I18N
+ case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */
+ *message = US"utf8 support required but not offered for forwarding";
+ DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message);
+ return TRUE;
+#endif
}
/* Handle error responses from the remote mailer. */
if (buffer[0] != 0)
{
- uschar *s = string_printing(buffer);
- *message = US string_sprintf("SMTP error from remote mail server after %s%s: "
- "host %s [%s]: %s", pl, smtp_command, host->name, host->address, s);
+ *message = string_sprintf("SMTP error from remote mail server after %s%s: "
+ "%s", pl, smtp_command, s = string_printing(buffer));
*pass_message = TRUE;
*yield = buffer[0];
return TRUE;
if (*errno_value == 0 || *errno_value == ECONNRESET)
{
*errno_value = ERRNO_SMTPCLOSED;
- *message = US string_sprintf("Remote host %s [%s] closed connection "
- "in response to %s%s", host->name, host->address, pl, smtp_command);
+ *message = US string_sprintf("Remote host closed connection "
+ "in response to %s%s", pl, smtp_command);
}
-else *message = US string_sprintf("%s [%s]", host->name, host->address);
+else
+ *message = US string_sprintf("%s [%s]", host->name, host->address);
return FALSE;
}
/* This writes to the main log and to the message log.
Arguments:
- addr the address item containing error information
host the current host
+ detail the current message (addr_item->message)
+ basic_errno the errno (addr_item->basic_errno)
Returns: nothing
*/
static void
-write_logs(address_item *addr, host_item *host)
+write_logs(const host_item *host, const uschar *suffix, int basic_errno)
{
-if (addr->message != NULL)
+
+
+uschar *message = LOGGING(outgoing_port)
+ ? string_sprintf("H=%s [%s]:%d", host->name, host->address,
+ host->port == PORT_NONE ? 25 : host->port)
+ : string_sprintf("H=%s [%s]", host->name, host->address);
+
+if (suffix)
{
- uschar *message = addr->message;
- if (addr->basic_errno > 0)
- message = string_sprintf("%s: %s", message, strerror(addr->basic_errno));
- log_write(0, LOG_MAIN, "%s", message);
- deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
+ message = string_sprintf("%s: %s", message, suffix);
+ if (basic_errno > 0)
+ message = string_sprintf("%s: %s", message, strerror(basic_errno));
}
else
- {
- uschar *msg =
- ((log_extra_selector & LX_outgoing_port) != 0)?
- string_sprintf("%s [%s]:%d", host->name, host->address,
- (host->port == PORT_NONE)? 25 : host->port)
- :
- string_sprintf("%s [%s]", host->name, host->address);
- log_write(0, LOG_MAIN, "%s %s", msg, strerror(addr->basic_errno));
- deliver_msglog("%s %s %s\n", tod_stamp(tod_log), msg,
- strerror(addr->basic_errno));
- }
+ message = string_sprintf("%s %s", message, exim_errstr(basic_errno));
+
+log_write(0, LOG_MAIN, "%s", message);
+deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
+}
+
+static void
+msglog_line(host_item * host, uschar * message)
+{
+deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log),
+ host->name, host->address, message);
}
+#ifndef DISABLE_EVENT
+/*************************************************
+* Post-defer action *
+*************************************************/
+
+/* This expands an arbitrary per-transport string.
+ It might, for example, be used to write to the database log.
+
+Arguments:
+ addr the address item containing error information
+ host the current host
+
+Returns: nothing
+*/
+
+static void
+deferred_event_raise(address_item *addr, host_item *host)
+{
+uschar * action = addr->transport->event_action;
+const uschar * save_domain;
+uschar * save_local;
+
+if (!action)
+ return;
+
+save_domain = deliver_domain;
+save_local = deliver_localpart;
+
+/*XXX would ip & port already be set up? */
+deliver_host_address = string_copy(host->address);
+deliver_host_port = host->port == PORT_NONE ? 25 : host->port;
+event_defer_errno = addr->basic_errno;
+
+router_name = addr->router->name;
+transport_name = addr->transport->name;
+deliver_domain = addr->domain;
+deliver_localpart = addr->local_part;
+
+(void) event_raise(action, US"msg:host:defer",
+ addr->message
+ ? addr->basic_errno > 0
+ ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno))
+ : string_copy(addr->message)
+ : addr->basic_errno > 0
+ ? string_copy(US strerror(addr->basic_errno))
+ : NULL);
+
+deliver_localpart = save_local;
+deliver_domain = save_domain;
+router_name = transport_name = NULL;
+}
+#endif
+
/*************************************************
* Synchronize SMTP responses *
*************************************************/
converted to OK at the end.
Arguments:
- addrlist the complete address list
- include_affixes TRUE if affixes include in RCPT
- sync_addr ptr to the ptr of the one to start scanning at (updated)
- host the host we are connected to
+ sx smtp connection context
count the number of responses to read
- address_retry_
- include_sender true if 4xx retry is to include the sender it its key
- pending_MAIL true if the first response is for MAIL
pending_DATA 0 if last command sent was not DATA
+1 if previously had a good recipient
-1 if not previously had a good recipient
- inblock incoming SMTP block
- timeout timeout value
- buffer buffer for reading response
- buffsize size of buffer
Returns: 3 if at least one address had 2xx and one had 5xx
2 if at least one address had 5xx but none had 2xx
*/
static int
-sync_responses(address_item *addrlist, BOOL include_affixes,
- address_item **sync_addr, host_item *host, int count,
- BOOL address_retry_include_sender, BOOL pending_MAIL,
- int pending_DATA, smtp_inblock *inblock, int timeout, uschar *buffer,
- int buffsize)
+sync_responses(smtp_context * sx, int count, int pending_DATA)
{
-address_item *addr = *sync_addr;
+address_item *addr = sx->sync_addr;
+smtp_transport_options_block *ob =
+ (smtp_transport_options_block *)sx->tblock->options_block;
int yield = 0;
/* Handle the response for a MAIL command. On error, reinstate the original
command in big_buffer for error message use, and flush any further pending
responses before returning, except after I/O errors and timeouts. */
-if (pending_MAIL)
+if (sx->pending_MAIL)
{
+ DEBUG(D_transport) debug_printf("%s expect mail\n", __FUNCTION__);
count--;
- if (!smtp_read_response(inblock, buffer, buffsize, '2', timeout))
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', ob->command_timeout))
{
+ DEBUG(D_transport) debug_printf("bad response for MAIL\n");
Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */
- if (errno == 0 && buffer[0] != 0)
+ if (errno == 0 && sx->buffer[0] != 0)
{
uschar flushbuffer[4096];
int save_errno = 0;
- if (buffer[0] == '4')
+ if (sx->buffer[0] == '4')
{
save_errno = ERRNO_MAIL4XX;
- addr->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
}
while (count-- > 0)
{
- if (!smtp_read_response(inblock, flushbuffer, sizeof(flushbuffer),
- '2', timeout)
+ if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer),
+ '2', ob->command_timeout)
&& (errno != 0 || flushbuffer[0] == 0))
break;
}
errno = save_errno;
}
+
+ if (pending_DATA) count--; /* Number of RCPT responses to come */
+ while (count-- > 0) /* Mark any pending addrs with the host used */
+ {
+ while (addr->transport_return != PENDING_DEFER) addr = addr->next;
+ addr->host_used = sx->host;
+ addr = addr->next;
+ }
return -3;
}
}
while (count-- > 0)
{
- while (addr->transport_return != PENDING_DEFER) addr = addr->next;
+ while (addr->transport_return != PENDING_DEFER)
+ if (!(addr = addr->next))
+ return -2;
/* The address was accepted */
+ addr->host_used = sx->host;
- if (smtp_read_response(inblock, buffer, buffsize, '2', timeout))
+ DEBUG(D_transport) debug_printf("%s expect rcpt\n", __FUNCTION__);
+ if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', ob->command_timeout))
{
yield |= 1;
addr->transport_return = PENDING_OK;
else if (errno == ETIMEDOUT)
{
- int save_errno = errno;
- uschar *message = string_sprintf("SMTP timeout while connected to %s [%s] "
- "after RCPT TO:<%s>", host->name, host->address,
- transport_rcpt_address(addr, include_affixes));
- set_errno(addrlist, save_errno, message, DEFER, FALSE);
+ uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>",
+ transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
+ set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE);
retry_add_item(addr, addr->address_retry_key, 0);
update_waiting = FALSE;
return -1;
big_buffer for which we are checking the response, so the error message
makes sense. */
- else if (errno != 0 || buffer[0] == 0)
+ else if (errno != 0 || sx->buffer[0] == 0)
{
string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>",
- transport_rcpt_address(addr, include_affixes));
+ transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
return -2;
}
{
addr->message =
string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: "
- "host %s [%s]: %s", transport_rcpt_address(addr, include_affixes),
- host->name, host->address, string_printing(buffer));
+ "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes),
+ string_printing(sx->buffer));
setflag(addr, af_pass_message);
- deliver_msglog("%s %s\n", tod_stamp(tod_log), addr->message);
+ if (!sx->verify)
+ msglog_line(sx->host, addr->message);
/* The response was 5xx */
- if (buffer[0] == '5')
+ if (sx->buffer[0] == '5')
{
addr->transport_return = FAIL;
yield |= 2;
{
addr->transport_return = DEFER;
addr->basic_errno = ERRNO_RCPT4XX;
- addr->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
- /* Log temporary errors if there are more hosts to be tried. */
+ if (!sx->verify)
+ {
+#ifndef DISABLE_EVENT
+ event_defer_errno = addr->more_errno;
+ msg_event_raise(US"msg:rcpt:host:defer", addr);
+#endif
- if (host->next != NULL) log_write(0, LOG_MAIN, "%s", addr->message);
+ /* Log temporary errors if there are more hosts to be tried.
+ If not, log this last one in the == line. */
- /* Do not put this message on the list of those waiting for specific
- hosts, as otherwise it is likely to be tried too often. */
+ if (sx->host->next)
+ log_write(0, LOG_MAIN, "H=%s [%s]: %s",
+ sx->host->name, sx->host->address, addr->message);
- update_waiting = FALSE;
+#ifndef DISABLE_EVENT
+ else
+ msg_event_raise(US"msg:rcpt:defer", addr);
+#endif
- /* Add a retry item for the address so that it doesn't get tried again
- too soon. If address_retry_include_sender is true, add the sender address
- to the retry key. */
+ /* Do not put this message on the list of those waiting for specific
+ hosts, as otherwise it is likely to be tried too often. */
- if (address_retry_include_sender)
- {
- uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
- sender_address);
- retry_add_item(addr, altkey, 0);
- }
- else retry_add_item(addr, addr->address_retry_key, 0);
+ update_waiting = FALSE;
+
+ /* Add a retry item for the address so that it doesn't get tried again
+ too soon. If address_retry_include_sender is true, add the sender address
+ to the retry key. */
+
+ retry_add_item(addr,
+ ob->address_retry_include_sender
+ ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address)
+ : addr->address_retry_key,
+ 0);
+ }
}
}
} /* Loop for next RCPT response */
/* Update where to start at for the next block of responses, unless we
have already handled all the addresses. */
-if (addr != NULL) *sync_addr = addr->next;
+if (addr) sx->sync_addr = addr->next;
/* Handle a response to DATA. If we have not had any good recipients, either
previously or in this block, the response is ignored. */
-if (pending_DATA != 0 &&
- !smtp_read_response(inblock, buffer, buffsize, '3', timeout))
+if (pending_DATA != 0)
{
- int code;
- uschar *msg;
- BOOL pass_message;
- if (pending_DATA > 0 || (yield & 1) != 0)
+ DEBUG(D_transport) debug_printf("%s expect data\n", __FUNCTION__);
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '3', ob->command_timeout))
{
- if (errno == 0 && buffer[0] == '4')
+ int code;
+ uschar *msg;
+ BOOL pass_message;
+ if (pending_DATA > 0 || (yield & 1) != 0)
{
- errno = ERRNO_DATA4XX;
- addrlist->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ if (errno == 0 && sx->buffer[0] == '4')
+ {
+ errno = ERRNO_DATA4XX;
+ sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
+ }
+ return -3;
}
- return -3;
+ (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message);
+ DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining "
+ "is in use and there were no good recipients\n", msg);
}
- (void)check_response(host, &errno, 0, buffer, &code, &msg, &pass_message);
- DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining "
- "is in use and there were no good recipients\n", msg);
}
/* All responses read and handled; MAIL (if present) received 2xx and DATA (if
-/*************************************************
-* Deliver address list to given host *
-*************************************************/
+/* Do the client side of smtp-level authentication */
+/*
+Arguments:
+ buffer EHLO response from server (gets overwritten)
+ addrlist chain of potential addresses to deliver
+ host host to deliver to
+ ob transport options
+ ibp, obp comms channel control blocks
+
+Returns:
+ OK Success, or failed (but not required): global "smtp_authenticated" set
+ DEFER Failed authentication (and was required)
+ ERROR Internal problem
+
+ FAIL_SEND Failed communications - transmit
+ FAIL - response
+*/
-/* If continue_hostname is not null, we get here only when continuing to
-deliver down an existing channel. The channel was passed as the standard
-input.
+int
+smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host,
+ smtp_transport_options_block *ob, BOOL is_esmtp,
+ smtp_inblock *ibp, smtp_outblock *obp)
+{
+int require_auth;
+uschar *fail_reason = US"server did not advertise AUTH support";
-Otherwise, we have to make a connection to the remote host, and do the
-initial protocol exchange.
+smtp_authenticated = FALSE;
+client_authenticator = client_authenticated_id = client_authenticated_sender = NULL;
+require_auth = verify_check_given_host(&ob->hosts_require_auth, host);
-When running as an MUA wrapper, if the sender or any recipient is rejected,
-temporarily or permanently, we force failure for all recipients.
+if (is_esmtp && !regex_AUTH) regex_AUTH =
+ regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
+ FALSE, TRUE);
-Arguments:
- addrlist chain of potential addresses to deliver; only those whose
- transport_return field is set to PENDING_DEFER are currently
- being processed; others should be skipped - they have either
- been delivered to an earlier host or IP address, or been
- failed by one of them.
- host host to deliver to
- host_af AF_INET or AF_INET6
- port default TCP/IP port to use, in host byte order
- interface interface to bind to, or NULL
- tblock transport instance block
- copy_host TRUE if host set in addr->host_used must be copied, because
- it is specific to this call of the transport
- message_defer set TRUE if yield is OK, but all addresses were deferred
- because of a non-recipient, non-host failure, that is, a
- 4xx response to MAIL FROM, DATA, or ".". This is a defer
- that is specific to the message.
- suppress_tls if TRUE, don't attempt a TLS connection - this is set for
- a second attempt after TLS initialization fails
+if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1))
+ {
+ uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]);
+ expand_nmax = -1; /* reset */
-Returns: OK - the connection was made and the delivery attempted;
- the result for each address is in its data block.
- DEFER - the connection could not be made, or something failed
- while setting up the SMTP session, or there was a
- non-message-specific error, such as a timeout.
- ERROR - a filter command is specified for this transport,
- and there was a problem setting it up; OR helo_data
- or add_headers or authenticated_sender is specified
- for this transport, and the string failed to expand
-*/
+ /* Must not do this check until after we have saved the result of the
+ regex match above. */
-static int
-smtp_deliver(address_item *addrlist, host_item *host, int host_af, int port,
- uschar *interface, transport_instance *tblock, BOOL copy_host,
- BOOL *message_defer, BOOL suppress_tls)
-{
-address_item *addr;
-address_item *sync_addr;
-address_item *first_addr = addrlist;
-int yield = OK;
-int address_count;
-int save_errno;
-int rc;
-time_t start_delivery_time = time(NULL);
-smtp_transport_options_block *ob =
- (smtp_transport_options_block *)(tblock->options_block);
-BOOL lmtp = strcmpic(ob->protocol, US"lmtp") == 0;
-BOOL ok = FALSE;
-BOOL send_rset = TRUE;
-BOOL send_quit = TRUE;
-BOOL setting_up = TRUE;
-BOOL completed_address = FALSE;
-BOOL esmtp = TRUE;
-BOOL pending_MAIL;
-BOOL pass_message = FALSE;
-smtp_inblock inblock;
-smtp_outblock outblock;
-int max_rcpt = tblock->max_addresses;
-uschar *igquotstr = US"";
-uschar *local_authenticated_sender = authenticated_sender;
-uschar *helo_data = NULL;
-uschar *message = NULL;
-uschar new_message_id[MESSAGE_ID_LENGTH + 1];
-uschar *p;
-uschar buffer[4096];
-uschar inbuffer[4096];
-uschar outbuffer[1024];
+ if (require_auth == OK ||
+ verify_check_given_host(&ob->hosts_try_auth, host) == OK)
+ {
+ auth_instance *au;
+ fail_reason = US"no common mechanisms were found";
-suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
+ DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n");
-*message_defer = FALSE;
-smtp_command = US"initial connection";
-if (max_rcpt == 0) max_rcpt = 999999;
+ /* Scan the configured authenticators looking for one which is configured
+ for use as a client, which is not suppressed by client_condition, and
+ whose name matches an authentication mechanism supported by the server.
+ If one is found, attempt to authenticate by calling its client function.
+ */
-/* Set up the buffer for reading SMTP response packets. */
+ for (au = auths; !smtp_authenticated && au; au = au->next)
+ {
+ uschar *p = names;
+ if (!au->client ||
+ (au->client_condition != NULL &&
+ !expand_check_condition(au->client_condition, au->name,
+ US"client authenticator")))
+ {
+ DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n",
+ au->name,
+ (au->client)? "client_condition is false" :
+ "not configured as a client");
+ continue;
+ }
+
+ /* Loop to scan supported server mechanisms */
+
+ while (*p)
+ {
+ int rc;
+ int len = Ustrlen(au->public_name);
+ while (isspace(*p)) p++;
+
+ if (strncmpic(au->public_name, p, len) != 0 ||
+ (p[len] != 0 && !isspace(p[len])))
+ {
+ while (*p != 0 && !isspace(*p)) p++;
+ continue;
+ }
+
+ /* Found data for a listed mechanism. Call its client entry. Set
+ a flag in the outblock so that data is overwritten after sending so
+ that reflections don't show it. */
+
+ fail_reason = US"authentication attempt(s) failed";
+ obp->authenticating = TRUE;
+ rc = (au->info->clientcode)(au, ibp, obp,
+ ob->command_timeout, buffer, bufsize);
+ obp->authenticating = FALSE;
+ DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n",
+ au->name, rc);
+
+ /* A temporary authentication failure must hold up delivery to
+ this host. After a permanent authentication failure, we carry on
+ to try other authentication methods. If all fail hard, try to
+ deliver the message unauthenticated unless require_auth was set. */
+
+ switch(rc)
+ {
+ case OK:
+ smtp_authenticated = TRUE; /* stops the outer loop */
+ client_authenticator = au->name;
+ if (au->set_client_id != NULL)
+ client_authenticated_id = expand_string(au->set_client_id);
+ break;
+
+ /* Failure after writing a command */
+
+ case FAIL_SEND:
+ return FAIL_SEND;
+
+ /* Failure after reading a response */
+
+ case FAIL:
+ if (errno != 0 || buffer[0] != '5') return FAIL;
+ log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s",
+ au->name, host->name, host->address, buffer);
+ break;
+
+ /* Failure by some other means. In effect, the authenticator
+ decided it wasn't prepared to handle this case. Typically this
+ is the result of "fail" in an expansion string. Do we need to
+ log anything here? Feb 2006: a message is now put in the buffer
+ if logging is required. */
+
+ case CANCELLED:
+ if (*buffer != 0)
+ log_write(0, LOG_MAIN, "%s authenticator cancelled "
+ "authentication H=%s [%s] %s", au->name, host->name,
+ host->address, buffer);
+ break;
+
+ /* Internal problem, message in buffer. */
+
+ case ERROR:
+ set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer),
+ DEFER, FALSE);
+ return ERROR;
+ }
+
+ break; /* If not authenticated, try next authenticator */
+ } /* Loop for scanning supported server mechanisms */
+ } /* Loop for further authenticators */
+ }
+ }
-inblock.buffer = inbuffer;
-inblock.buffersize = sizeof(inbuffer);
-inblock.ptr = inbuffer;
-inblock.ptrend = inbuffer;
+/* If we haven't authenticated, but are required to, give up. */
-/* Set up the buffer for holding SMTP commands while pipelining */
+if (require_auth == OK && !smtp_authenticated)
+ {
+ set_errno_nohost(addrlist, ERRNO_AUTHFAIL,
+ string_sprintf("authentication required but %s", fail_reason), DEFER,
+ FALSE);
+ return DEFER;
+ }
-outblock.buffer = outbuffer;
-outblock.buffersize = sizeof(outbuffer);
-outblock.ptr = outbuffer;
-outblock.cmd_count = 0;
-outblock.authenticating = FALSE;
+return OK;
+}
-/* If an authenticated_sender override has been specified for this transport
-instance, expand it. If the expansion is forced to fail, and there was already
-an authenticated_sender for this message, the original value will be used.
-Other expansion failures are serious. An empty result is ignored, but there is
-otherwise no check - this feature is expected to be used with LMTP and other
-cases where non-standard addresses (e.g. without domains) might be required. */
+
+/* Construct AUTH appendix string for MAIL TO */
+/*
+Arguments
+ buffer to build string
+ addrlist chain of potential addresses to deliver
+ ob transport options
+
+Globals smtp_authenticated
+ client_authenticated_sender
+Return True on error, otherwise buffer has (possibly empty) terminated string
+*/
+
+BOOL
+smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist,
+ smtp_transport_options_block *ob)
+{
+uschar *local_authenticated_sender = authenticated_sender;
+
+#ifdef notdef
+ debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N");
+#endif
if (ob->authenticated_sender != NULL)
{
{
uschar *message = string_sprintf("failed to expand "
"authenticated_sender: %s", expand_string_message);
- set_errno(addrlist, 0, message, DEFER, FALSE);
- return ERROR;
+ set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
+ return TRUE;
}
}
else if (new[0] != 0) local_authenticated_sender = new;
}
-/* Make a connection to the host if this isn't a continued delivery, and handle
-the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled
-specially so they can be identified for retries. */
+/* Add the authenticated sender address if present */
-if (continue_hostname == NULL)
+if ((smtp_authenticated || ob->authenticated_sender_force) &&
+ local_authenticated_sender != NULL)
{
- inblock.sock = outblock.sock =
- smtp_connect(host, host_af, port, interface, ob->connect_timeout,
- ob->keepalive);
- if (inblock.sock < 0)
- {
- set_errno(addrlist, (errno == ETIMEDOUT)? ERRNO_CONNECTTIMEOUT : errno,
- NULL, DEFER, FALSE);
- return DEFER;
- }
+ string_format(buffer, bufsize, " AUTH=%s",
+ auth_xtextencode(local_authenticated_sender,
+ Ustrlen(local_authenticated_sender)));
+ client_authenticated_sender = string_copy(local_authenticated_sender);
+ }
+else
+ *buffer= 0;
- /* Expand the greeting message while waiting for the initial response. (Makes
- sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
- delayed till here so that $sending_interface and $sending_port are set. */
+return FALSE;
+}
- helo_data = expand_string(ob->helo_data);
- /* The first thing is to wait for an initial OK response. The dreaded "goto"
- is nevertheless a reasonably clean way of programming this kind of logic,
- where you want to escape on any error. */
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout)) goto RESPONSE_FAILED;
+#ifdef SUPPORT_DANE
+/* Lookup TLSA record for host/port.
+Return: OK success with dnssec; DANE mode
+ DEFER Do not use this host now, may retry later
+ FAIL_FORCED No TLSA record; DANE not usable
+ FAIL Do not use this connection
+*/
- /* Now check if the helo_data expansion went well, and sign off cleanly if it
- didn't. */
+int
+tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required)
+{
+/* move this out to host.c given the similarity to dns_lookup() ? */
+uschar buffer[300];
+const uschar * fullname = buffer;
+int rc;
+BOOL sec;
- if (helo_data == NULL)
- {
- uschar *message = string_sprintf("failed to expand helo_data: %s",
- expand_string_message);
- set_errno(addrlist, 0, message, DEFER, FALSE);
- yield = DEFER;
- goto SEND_QUIT;
- }
+/* TLSA lookup string */
+(void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name);
-/** Debugging without sending a message
-addrlist->transport_return = DEFER;
-goto SEND_QUIT;
-**/
+rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname);
+sec = dns_is_secure(dnsa);
+DEBUG(D_transport)
+ debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not ");
- /* Errors that occur after this point follow an SMTP command, which is
- left in big_buffer by smtp_write_command() for use in error messages. */
+switch (rc)
+ {
+ case DNS_AGAIN:
+ return DEFER; /* just defer this TLS'd conn */
+
+ case DNS_SUCCEED:
+ if (sec) return OK;
+ log_write(0, LOG_MAIN,
+ "DANE error: TLSA lookup for %s not DNSSEC", host->name);
+ /*FALLTRHOUGH*/
+
+ case DNS_NODATA: /* no TLSA RR for this lookup */
+ case DNS_NOMATCH: /* no records at all for this lookup */
+ return dane_required ? FAIL : FAIL_FORCED;
+
+ default:
+ case DNS_FAIL:
+ return dane_required ? FAIL : DEFER;
+ }
+}
+#endif
- smtp_command = big_buffer;
- /* Tell the remote who we are...
- February 1998: A convention has evolved that ESMTP-speaking MTAs include the
- string "ESMTP" in their greeting lines, so make Exim send EHLO if the
- greeting is of this form. The assumption was that the far end supports it
+typedef struct smtp_compare_s
+{
+ uschar *current_sender_address;
+ struct transport_instance *tblock;
+} smtp_compare_t;
+
+
+/* Create a unique string that identifies this message, it is based on
+sender_address, helo_data and tls_certificate if enabled.
+*/
+
+static uschar *
+smtp_local_identity(uschar * sender, struct transport_instance * tblock)
+{
+address_item * addr1;
+uschar * if1 = US"";
+uschar * helo1 = US"";
+#ifdef SUPPORT_TLS
+uschar * tlsc1 = US"";
+#endif
+uschar * save_sender_address = sender_address;
+uschar * local_identity = NULL;
+smtp_transport_options_block * ob =
+ (smtp_transport_options_block *)tblock->options_block;
+
+sender_address = sender;
+
+addr1 = deliver_make_addr (sender, TRUE);
+deliver_set_expansions(addr1);
+
+if (ob->interface)
+ if1 = expand_string(ob->interface);
+
+if (ob->helo_data)
+ helo1 = expand_string(ob->helo_data);
+
+#ifdef SUPPORT_TLS
+if (ob->tls_certificate)
+ tlsc1 = expand_string(ob->tls_certificate);
+local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1);
+#else
+local_identity = string_sprintf ("%s^%s", if1, helo1);
+#endif
+
+deliver_set_expansions(NULL);
+sender_address = save_sender_address;
+
+return local_identity;
+}
+
+
+
+/* This routine is a callback that is called from transport_check_waiting.
+This function will evaluate the incoming message versus the previous
+message. If the incoming message is using a different local identity then
+we will veto this new message. */
+
+static BOOL
+smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare)
+{
+uschar * message_local_identity,
+ * current_local_identity,
+ * new_sender_address;
+
+current_local_identity =
+ smtp_local_identity(s_compare->current_sender_address, s_compare->tblock);
+
+if (!(new_sender_address = deliver_get_sender_address(message_id)))
+ return 0;
+
+message_local_identity =
+ smtp_local_identity(new_sender_address, s_compare->tblock);
+
+return Ustrcmp(current_local_identity, message_local_identity) == 0;
+}
+
+
+
+static unsigned
+ehlo_response(uschar * buf, unsigned checks)
+{
+size_t bsize = Ustrlen(buf);
+
+#ifdef SUPPORT_TLS
+if ( checks & OPTION_TLS
+ && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_TLS;
+
+# ifdef EXPERIMENTAL_REQUIRETLS
+if ( checks & OPTION_REQUIRETLS
+ && pcre_exec(regex_REQUIRETLS, NULL, CS buf,bsize, 0, PCRE_EOPT, NULL,0) < 0)
+ checks &= ~OPTION_REQUIRETLS;
+# endif
+#endif
+
+if ( checks & OPTION_IGNQ
+ && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0,
+ PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_IGNQ;
+
+if ( checks & OPTION_CHUNKING
+ && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_CHUNKING;
+
+#ifndef DISABLE_PRDR
+if ( checks & OPTION_PRDR
+ && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_PRDR;
+#endif
+
+#ifdef SUPPORT_I18N
+if ( checks & OPTION_UTF8
+ && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_UTF8;
+#endif
+
+if ( checks & OPTION_DSN
+ && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_DSN;
+
+if ( checks & OPTION_PIPE
+ && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0,
+ PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_PIPE;
+
+if ( checks & OPTION_SIZE
+ && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
+ checks &= ~OPTION_SIZE;
+
+return checks;
+}
+
+
+
+/* Callback for emitting a BDAT data chunk header.
+
+If given a nonzero size, first flush any buffered SMTP commands
+then emit the command.
+
+Reap previous SMTP command responses if requested, and always reap
+the response from a previous BDAT command.
+
+Args:
+ tctx transport context
+ chunk_size value for SMTP BDAT command
+ flags
+ tc_chunk_last add LAST option to SMTP BDAT command
+ tc_reap_prev reap response to previous SMTP commands
+
+Returns: OK or ERROR
+*/
+
+static int
+smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size,
+ unsigned flags)
+{
+smtp_transport_options_block * ob =
+ (smtp_transport_options_block *)(tctx->tblock->options_block);
+smtp_context * sx = tctx->smtp_context;
+int cmd_count = 0;
+int prev_cmd_count;
+
+/* Write SMTP chunk header command. If not reaping responses, note that
+there may be more writes (like, the chunk data) done soon. */
+
+if (chunk_size > 0)
+ {
+ if((cmd_count = smtp_write_command(&sx->outblock,
+ flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE,
+ "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "")
+ ) < 0) return ERROR;
+ if (flags & tc_chunk_last)
+ data_command = string_copy(big_buffer); /* Save for later error message */
+ }
+
+prev_cmd_count = cmd_count += sx->cmd_count;
+
+/* Reap responses for any previous, but not one we just emitted */
+
+if (chunk_size > 0)
+ prev_cmd_count--;
+if (sx->pending_BDAT)
+ prev_cmd_count--;
+
+if (flags & tc_reap_prev && prev_cmd_count > 0)
+ {
+ DEBUG(D_transport) debug_printf("look for %d responses"
+ " for previous pipelined cmds\n", prev_cmd_count);
+
+ switch(sync_responses(sx, prev_cmd_count, 0))
+ {
+ case 1: /* 2xx (only) => OK */
+ case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */
+ case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
+ case 0: break; /* No 2xx or 5xx, but no probs */
+
+ case -1: /* Timeout on RCPT */
+ default: return ERROR; /* I/O error, or any MAIL/DATA error */
+ }
+ cmd_count = 1;
+ if (!sx->pending_BDAT)
+ pipelining_active = FALSE;
+ }
+
+/* Reap response for an outstanding BDAT */
+
+if (sx->pending_BDAT)
+ {
+ DEBUG(D_transport) debug_printf("look for one response for BDAT\n");
+
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
+ ob->command_timeout))
+ {
+ if (errno == 0 && sx->buffer[0] == '4')
+ {
+ errno = ERRNO_DATA4XX; /*XXX does this actually get used? */
+ sx->addrlist->more_errno |=
+ ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
+ }
+ return ERROR;
+ }
+ cmd_count--;
+ sx->pending_BDAT = FALSE;
+ pipelining_active = FALSE;
+ }
+else if (chunk_size > 0)
+ sx->pending_BDAT = TRUE;
+
+
+sx->cmd_count = cmd_count;
+return OK;
+}
+
+
+
+/*************************************************
+* Make connection for given message *
+*************************************************/
+
+/*
+Arguments:
+ ctx connection context
+ suppress_tls if TRUE, don't attempt a TLS connection - this is set for
+ a second attempt after TLS initialization fails
+
+Returns: OK - the connection was made and the delivery attempted;
+ fd is set in the conn context, tls_out set up.
+ DEFER - the connection could not be made, or something failed
+ while setting up the SMTP session, or there was a
+ non-message-specific error, such as a timeout.
+ ERROR - helo_data or add_headers or authenticated_sender is
+ specified for this transport, and the string failed
+ to expand
+*/
+int
+smtp_setup_conn(smtp_context * sx, BOOL suppress_tls)
+{
+#if defined(SUPPORT_TLS) && defined(SUPPORT_DANE)
+dns_answer tlsa_dnsa;
+#endif
+BOOL pass_message = FALSE;
+uschar * message = NULL;
+int yield = OK;
+int rc;
+
+sx->ob = (smtp_transport_options_block *) sx->tblock->options_block;
+
+sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0;
+sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0;
+sx->ok = FALSE;
+sx->send_rset = TRUE;
+sx->send_quit = TRUE;
+sx->setting_up = TRUE;
+sx->esmtp = TRUE;
+sx->esmtp_sent = FALSE;
+#ifdef SUPPORT_I18N
+sx->utf8_needed = FALSE;
+#endif
+sx->dsn_all_lasthop = TRUE;
+#if defined(SUPPORT_TLS) && defined(SUPPORT_DANE)
+sx->dane = FALSE;
+sx->dane_required =
+ verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK;
+#endif
+
+if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999;
+sx->peer_offered = 0;
+sx->avoid_option = 0;
+sx->igquotstr = US"";
+if (!sx->helo_data) sx->helo_data = sx->ob->helo_data;
+#ifdef EXPERIMENTAL_DSN_INFO
+sx->smtp_greeting = NULL;
+sx->helo_response = NULL;
+#endif
+
+smtp_command = US"initial connection";
+sx->buffer[0] = '\0';
+
+/* Set up the buffer for reading SMTP response packets. */
+
+sx->inblock.buffer = sx->inbuffer;
+sx->inblock.buffersize = sizeof(sx->inbuffer);
+sx->inblock.ptr = sx->inbuffer;
+sx->inblock.ptrend = sx->inbuffer;
+
+/* Set up the buffer for holding SMTP commands while pipelining */
+
+sx->outblock.buffer = sx->outbuffer;
+sx->outblock.buffersize = sizeof(sx->outbuffer);
+sx->outblock.ptr = sx->outbuffer;
+sx->outblock.cmd_count = 0;
+sx->outblock.authenticating = FALSE;
+
+/* Reset the parameters of a TLS session. */
+
+tls_out.bits = 0;
+tls_out.cipher = NULL; /* the one we may use for this transport */
+tls_out.ourcert = NULL;
+tls_out.peercert = NULL;
+tls_out.peerdn = NULL;
+#if defined(SUPPORT_TLS) && !defined(USE_GNUTLS)
+tls_out.sni = NULL;
+#endif
+tls_out.ocsp = OCSP_NOT_REQ;
+
+/* Flip the legacy TLS-related variables over to the outbound set in case
+they're used in the context of the transport. Don't bother resetting
+afterward (when being used by a transport) as we're in a subprocess.
+For verify, unflipped once the callout is dealt with */
+
+tls_modify_variables(&tls_out);
+
+#ifndef SUPPORT_TLS
+if (sx->smtps)
+ {
+ set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
+ DEFER, FALSE);
+ return ERROR;
+ }
+#endif
+
+/* Make a connection to the host if this isn't a continued delivery, and handle
+the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled
+specially so they can be identified for retries. */
+
+if (!continue_hostname)
+ {
+ if (sx->verify)
+ HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port);
+
+ /* Get the actual port the connection will use, into sx->host */
+
+ smtp_port_for_connect(sx->host, sx->port);
+
+#if defined(SUPPORT_TLS) && defined(SUPPORT_DANE)
+ /* Do TLSA lookup for DANE */
+ {
+ tls_out.dane_verified = FALSE;
+ tls_out.tlsa_usage = 0;
+
+ if (sx->host->dnssec == DS_YES)
+ {
+ if( sx->dane_required
+ || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK
+ )
+ switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required))
+ {
+ case OK: sx->dane = TRUE;
+ sx->ob->tls_tempfail_tryclear = FALSE;
+ break;
+ case FAIL_FORCED: break;
+ default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
+ string_sprintf("DANE error: tlsa lookup %s",
+ rc == DEFER ? "DEFER" : "FAIL"),
+ rc, FALSE);
+# ifndef DISABLE_EVENT
+ (void) event_raise(sx->tblock->event_action,
+ US"dane:fail", sx->dane_required
+ ? US"dane-required" : US"dnssec-invalid");
+# endif
+ return rc;
+ }
+ }
+ else if (sx->dane_required)
+ {
+ set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
+ string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name),
+ FAIL, FALSE);
+# ifndef DISABLE_EVENT
+ (void) event_raise(sx->tblock->event_action,
+ US"dane:fail", US"dane-required");
+# endif
+ return FAIL;
+ }
+ }
+#endif /*DANE*/
+
+ /* Make the TCP connection */
+
+ sx->cctx.sock =
+ smtp_connect(sx->host, sx->host_af, sx->interface,
+ sx->ob->connect_timeout, sx->tblock);
+ sx->cctx.tls_ctx = NULL;
+ sx->inblock.cctx = sx->outblock.cctx = &sx->cctx;
+
+ if (sx->cctx.sock < 0)
+ {
+ uschar * msg = NULL;
+ if (sx->verify)
+ {
+ msg = US strerror(errno);
+ HDEBUG(D_verify) debug_printf("connect: %s\n", msg);
+ }
+ set_errno_nohost(sx->addrlist,
+ errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno,
+ sx->verify ? string_sprintf("could not connect: %s", msg)
+ : NULL,
+ DEFER, FALSE);
+ sx->send_quit = FALSE;
+ return DEFER;
+ }
+
+ /* Expand the greeting message while waiting for the initial response. (Makes
+ sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
+ delayed till here so that $sending_interface and $sending_port are set. */
+
+ if (sx->helo_data)
+ if (!(sx->helo_data = expand_string(sx->helo_data)))
+ if (sx->verify)
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "<%s>: failed to expand transport's helo_data value for callout: %s",
+ sx->addrlist->address, expand_string_message);
+
+#ifdef SUPPORT_I18N
+ if (sx->helo_data)
+ {
+ expand_string_message = NULL;
+ if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data,
+ &expand_string_message)),
+ expand_string_message)
+ if (sx->verify)
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "<%s>: failed to expand transport's helo_data value for callout: %s",
+ sx->addrlist->address, expand_string_message);
+ else
+ sx->helo_data = NULL;
+ }
+#endif
+
+ /* The first thing is to wait for an initial OK response. The dreaded "goto"
+ is nevertheless a reasonably clean way of programming this kind of logic,
+ where you want to escape on any error. */
+
+ if (!sx->smtps)
+ {
+ BOOL good_response;
+
+#ifdef TCP_QUICKACK
+ (void) setsockopt(sx->cctx.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
+#endif
+ good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', sx->ob->command_timeout);
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->smtp_greeting = string_copy(sx->buffer);
+#endif
+ if (!good_response) goto RESPONSE_FAILED;
+
+#ifndef DISABLE_EVENT
+ {
+ uschar * s;
+ lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes"
+ : sx->host->dnssec==DS_NO ? US"no" : NULL;
+ s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer);
+ if (s)
+ {
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL,
+ string_sprintf("deferred by smtp:connect event expansion: %s", s),
+ DEFER, FALSE);
+ yield = DEFER;
+ goto SEND_QUIT;
+ }
+ }
+#endif
+
+ /* Now check if the helo_data expansion went well, and sign off cleanly if
+ it didn't. */
+
+ if (!sx->helo_data)
+ {
+ message = string_sprintf("failed to expand helo_data: %s",
+ expand_string_message);
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
+ yield = DEFER;
+ goto SEND_QUIT;
+ }
+ }
+
+/** Debugging without sending a message
+sx->addrlist->transport_return = DEFER;
+goto SEND_QUIT;
+**/
+
+ /* Errors that occur after this point follow an SMTP command, which is
+ left in big_buffer by smtp_write_command() for use in error messages. */
+
+ smtp_command = big_buffer;
+
+ /* Tell the remote who we are...
+
+ February 1998: A convention has evolved that ESMTP-speaking MTAs include the
+ string "ESMTP" in their greeting lines, so make Exim send EHLO if the
+ greeting is of this form. The assumption was that the far end supports it
properly... but experience shows that there are some that give 5xx responses,
even though the banner includes "ESMTP" (there's a bloody-minded one that
says "ESMTP not spoken here"). Cope with that case.
mailers use upper case for some reason (the RFC is quite clear about case
independence) so, for peace of mind, I gave in. */
- esmtp = verify_check_this_host(&(ob->hosts_avoid_esmtp), NULL,
- host->name, host->address, NULL) != OK;
+ sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK;
+
+ /* Alas; be careful, since this goto is not an error-out, so conceivably
+ we might set data between here and the target which we assume to exist
+ and be usable. I can see this coming back to bite us. */
+#ifdef SUPPORT_TLS
+ if (sx->smtps)
+ {
+ smtp_peer_options |= OPTION_TLS;
+ suppress_tls = FALSE;
+ sx->ob->tls_tempfail_tryclear = FALSE;
+ smtp_command = US"SSL-on-connect";
+ goto TLS_NEGOTIATE;
+ }
+#endif
- if (esmtp)
+ if (sx->esmtp)
{
- if (smtp_write_command(&outblock, FALSE, "%s %s\r\n",
- lmtp? "LHLO" : "EHLO", helo_data) < 0)
+ if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
+ sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0)
goto SEND_FAILED;
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout))
+ sx->esmtp_sent = TRUE;
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
+ sx->ob->command_timeout))
{
- if (errno != 0 || buffer[0] == 0 || lmtp) goto RESPONSE_FAILED;
- esmtp = FALSE;
+ if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp)
+ {
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->helo_response = string_copy(sx->buffer);
+#endif
+ goto RESPONSE_FAILED;
+ }
+ sx->esmtp = FALSE;
}
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->helo_response = string_copy(sx->buffer);
+#endif
}
else
- {
DEBUG(D_transport)
debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
- }
- if (!esmtp)
+ if (!sx->esmtp)
{
- if (smtp_write_command(&outblock, FALSE, "HELO %s\r\n", helo_data) < 0)
+ BOOL good_response;
+ int n = sizeof(sx->buffer);
+ uschar * rsp = sx->buffer;
+
+ if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2)
+ { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; }
+
+ if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0)
goto SEND_FAILED;
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout)) goto RESPONSE_FAILED;
+ good_response = smtp_read_response(&sx->inblock, rsp, n,
+ '2', sx->ob->command_timeout);
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->helo_response = string_copy(rsp);
+#endif
+ if (!good_response)
+ {
+ /* Handle special logging for a closed connection after HELO
+ when had previously sent EHLO */
+
+ if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
+ {
+ errno = ERRNO_SMTPCLOSED;
+ goto EHLOHELO_FAILED;
+ }
+ memmove(sx->buffer, rsp, Ustrlen(rsp));
+ goto RESPONSE_FAILED;
+ }
}
- /* Set IGNOREQUOTA if the response to LHLO specifies support and the
- lmtp_ignore_quota option was set. */
+ sx->avoid_option = sx->peer_offered = smtp_peer_options = 0;
- igquotstr = (lmtp && ob->lmtp_ignore_quota &&
- pcre_exec(regex_IGNOREQUOTA, NULL, CS buffer, Ustrlen(CS buffer), 0,
- PCRE_EOPT, NULL, 0) >= 0)? US" IGNOREQUOTA" : US"";
+ if (sx->esmtp || sx->lmtp)
+ {
+ sx->peer_offered = ehlo_response(sx->buffer,
+ OPTION_TLS /* others checked later */
+ );
/* Set tls_offered if the response to EHLO specifies support for STARTTLS. */
- #ifdef SUPPORT_TLS
- tls_offered = esmtp &&
- pcre_exec(regex_STARTTLS, NULL, CS buffer, Ustrlen(buffer), 0,
- PCRE_EOPT, NULL, 0) >= 0;
- #endif
+#ifdef SUPPORT_TLS
+ smtp_peer_options |= sx->peer_offered & OPTION_TLS;
+#endif
+ }
}
-/* For continuing deliveries down the same channel, the socket is the standard
-input, and we don't need to redo EHLO here (but may need to do so for TLS - see
-below). Set up the pointer to where subsequent commands will be left, for
-error messages. Note that smtp_use_size and smtp_use_pipelining will have been
+/* For continuing deliveries down the same channel, having re-exec'd the socket
+is the standard input; for a socket held open from verify it is recorded
+in the cutthrough context block. Either way we don't need to redo EHLO here
+(but may need to do so for TLS - see below).
+Set up the pointer to where subsequent commands will be left, for
+error messages. Note that smtp_peer_options will have been
set from the command line if they were set in the process that passed the
connection on. */
+/*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c
+as the continue goes via transport_pass_socket() and doublefork and exec.
+It does not wait. Unclear how we keep separate host's responses
+separate - we could match up by host ip+port as a bodge. */
+
else
{
- inblock.sock = outblock.sock = fileno(stdin);
+ if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
+ {
+ sx->cctx = cutthrough.cctx;
+ sx->host->port = sx->port = cutthrough.host.port;
+ }
+ else
+ {
+ sx->cctx.sock = 0; /* stdin */
+ sx->cctx.tls_ctx = NULL;
+ smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */
+ }
+ sx->inblock.cctx = sx->outblock.cctx = &sx->cctx;
smtp_command = big_buffer;
+ sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */
+
+ /* For a continued connection with TLS being proxied for us, or a
+ held-open verify connection with TLS, nothing more to do. */
+
+ if ( continue_proxy_cipher
+ || (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only
+ && cutthrough.is_tls)
+ )
+ {
+ sx->peer_offered = smtp_peer_options;
+ sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE);
+ HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n",
+ continue_proxy_cipher ? "proxied" : "verify conn with");
+ return OK;
+ }
+ HDEBUG(D_transport) debug_printf("continued connection, no TLS\n");
}
/* If TLS is available on this connection, whether continued or not, attempt to
for error analysis. */
#ifdef SUPPORT_TLS
-if (tls_offered && !suppress_tls &&
- verify_check_this_host(&(ob->hosts_avoid_tls), NULL, host->name,
- host->address, NULL) != OK)
+if ( smtp_peer_options & OPTION_TLS
+ && !suppress_tls
+ && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK
+ && ( !sx->verify
+ || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK
+ ) )
{
uschar buffer2[4096];
- if (smtp_write_command(&outblock, FALSE, "STARTTLS\r\n") < 0)
+ if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0)
goto SEND_FAILED;
/* If there is an I/O error, transmission of this message is deferred. If
STARTTLS, we carry on. This means we will try to send the message in clear,
unless the host is in hosts_require_tls (tested below). */
- if (!smtp_read_response(&inblock, buffer2, sizeof(buffer2), '2',
- ob->command_timeout))
+ if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2',
+ sx->ob->command_timeout))
{
- Ustrncpy(buffer, buffer2, sizeof(buffer));
- if (errno != 0 || buffer2[0] == 0 ||
- (buffer2[0] == '4' && !ob->tls_tempfail_tryclear))
+ if ( errno != 0
+ || buffer2[0] == 0
+ || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear)
+ )
+ {
+ Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer));
+ sx->buffer[sizeof(sx->buffer)-1] = '\0';
goto RESPONSE_FAILED;
+ }
}
/* STARTTLS accepted: try to negotiate a TLS session. */
else
+ TLS_NEGOTIATE:
{
- int rc = tls_client_start(inblock.sock,
- host,
- addrlist,
- NULL, /* No DH param */
- ob->tls_certificate,
- ob->tls_privatekey,
- ob->tls_verify_certificates,
- ob->tls_crl,
- ob->tls_require_ciphers,
- ob->gnutls_require_mac,
- ob->gnutls_require_kx,
- ob->gnutls_require_proto,
- ob->command_timeout);
-
- /* TLS negotiation failed; give an error. From outside, this function may
- be called again to try in clear on a new connection, if the options permit
- it for this host. */
-
- if (rc != OK)
- {
- save_errno = ERRNO_TLSFAILURE;
- message = US"failure while setting up TLS session";
- send_quit = FALSE;
+ address_item * addr;
+ uschar * errstr;
+ sx->cctx.tls_ctx = tls_client_start(sx->cctx.sock, sx->host,
+ sx->addrlist, sx->tblock,
+# ifdef SUPPORT_DANE
+ sx->dane ? &tlsa_dnsa : NULL,
+# endif
+ &tls_out, &errstr);
+
+ if (!sx->cctx.tls_ctx)
+ {
+ /* TLS negotiation failed; give an error. From outside, this function may
+ be called again to try in clear on a new connection, if the options permit
+ it for this host. */
+
+# ifdef SUPPORT_DANE
+ if (sx->dane)
+ {
+ log_write(0, LOG_MAIN,
+ "DANE attempt failed; TLS connection to %s [%s]: %s",
+ sx->host->name, sx->host->address, errstr);
+# ifndef DISABLE_EVENT
+ (void) event_raise(sx->tblock->event_action,
+ US"dane:fail", US"validation-failure"); /* could do with better detail */
+# endif
+ }
+# endif
+
+ errno = ERRNO_TLSFAILURE;
+ message = string_sprintf("TLS session: %s", errstr);
+ sx->send_quit = FALSE;
goto TLS_FAILED;
}
/* TLS session is set up */
- for (addr = addrlist; addr != NULL; addr = addr->next)
- {
+ smtp_peer_options_wrap = smtp_peer_options;
+ for (addr = sx->addrlist; addr; addr = addr->next)
if (addr->transport_return == PENDING_DEFER)
{
- addr->cipher = tls_cipher;
- addr->peerdn = tls_peerdn;
+ addr->cipher = tls_out.cipher;
+ addr->ourcert = tls_out.ourcert;
+ addr->peercert = tls_out.peercert;
+ addr->peerdn = tls_out.peerdn;
+ addr->ocsp = tls_out.ocsp;
}
- }
}
}
+/* if smtps, we'll have smtp_command set to something else; always safe to
+reset it here. */
+smtp_command = big_buffer;
+
/* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If
helo_data is null, we are dealing with a connection that was passed from
another process, and so we won't have expanded helo_data above. We have to
expand it here. $sending_ip_address and $sending_port are set up right at the
start of the Exim process (in exim.c). */
-if (tls_active >= 0)
+if (tls_out.active.sock >= 0)
{
- if (helo_data == NULL)
+ char *greeting_cmd;
+ BOOL good_response;
+
+ if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data)))
{
- helo_data = expand_string(ob->helo_data);
- if (helo_data == NULL)
- {
- uschar *message = string_sprintf("failed to expand helo_data: %s",
- expand_string_message);
- set_errno(addrlist, 0, message, DEFER, FALSE);
- yield = DEFER;
- goto SEND_QUIT;
- }
+ uschar *message = string_sprintf("failed to expand helo_data: %s",
+ expand_string_message);
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
+ yield = DEFER;
+ goto SEND_QUIT;
+ }
+
+ /* For SMTPS we need to wait for the initial OK response. */
+ if (sx->smtps)
+ {
+ good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', sx->ob->command_timeout);
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->smtp_greeting = string_copy(sx->buffer);
+#endif
+ if (!good_response) goto RESPONSE_FAILED;
+ }
+
+ if (sx->esmtp)
+ greeting_cmd = "EHLO";
+ else
+ {
+ greeting_cmd = "HELO";
+ DEBUG(D_transport)
+ debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
}
- if (smtp_write_command(&outblock, FALSE, "%s %s\r\n", lmtp? "LHLO" : "EHLO",
- helo_data) < 0)
+ if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
+ sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0)
goto SEND_FAILED;
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout))
- goto RESPONSE_FAILED;
+ good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', sx->ob->command_timeout);
+#ifdef EXPERIMENTAL_DSN_INFO
+ sx->helo_response = string_copy(sx->buffer);
+#endif
+ if (!good_response) goto RESPONSE_FAILED;
+ smtp_peer_options = 0;
}
/* If the host is required to use a secure channel, ensure that we
have one. */
-else if (verify_check_this_host(&(ob->hosts_require_tls), NULL, host->name,
- host->address, NULL) == OK)
+else if ( sx->smtps
+# ifdef SUPPORT_DANE
+ || sx->dane
+# endif
+# ifdef EXPERIMENTAL_REQUIRETLS
+ || tls_requiretls & REQUIRETLS_MSG
+# endif
+ || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK
+ )
{
- save_errno = ERRNO_TLSREQUIRED;
- message = string_sprintf("a TLS session is required for %s [%s], but %s",
- host->name, host->address,
- tls_offered? "an attempt to start TLS failed" :
- "the server did not offer TLS support");
+ errno =
+# ifdef EXPERIMENTAL_REQUIRETLS
+ tls_requiretls & REQUIRETLS_MSG ? ERRNO_REQUIRETLS :
+# endif
+ ERRNO_TLSREQUIRED;
+ message = string_sprintf("a TLS session is required, but %s",
+ smtp_peer_options & OPTION_TLS
+ ? "an attempt to start TLS failed" : "the server did not offer TLS support");
+# if defined(SUPPORT_DANE) && !defined(DISABLE_EVENT)
+ if (sx->dane)
+ (void) event_raise(sx->tblock->event_action, US"dane:fail",
+ smtp_peer_options & OPTION_TLS
+ ? US"validation-failure" /* could do with better detail */
+ : US"starttls-not-supported");
+# endif
goto TLS_FAILED;
}
-#endif
+#endif /*SUPPORT_TLS*/
/* If TLS is active, we have just started it up and re-done the EHLO command,
so its response needs to be analyzed. If TLS is not active and this is a
we skip this. */
if (continue_hostname == NULL
- #ifdef SUPPORT_TLS
- || tls_active >= 0
- #endif
- )
+#ifdef SUPPORT_TLS
+ || tls_out.active.sock >= 0
+#endif
+ )
{
- int require_auth;
- uschar *fail_reason = US"server did not advertise AUTH support";
+ if (sx->esmtp || sx->lmtp)
+ {
+ sx->peer_offered = ehlo_response(sx->buffer,
+ 0 /* no TLS */
+ | (sx->lmtp && sx->ob->lmtp_ignore_quota ? OPTION_IGNQ : 0)
+ | OPTION_CHUNKING
+ | OPTION_PRDR
+#ifdef SUPPORT_I18N
+ | (sx->addrlist->prop.utf8_msg ? OPTION_UTF8 : 0)
+ /*XXX if we hand peercaps on to continued-conn processes,
+ must not depend on this addr */
+#endif
+ | OPTION_DSN
+ | OPTION_PIPE
+ | (sx->ob->size_addition >= 0 ? OPTION_SIZE : 0)
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+ | (tls_requiretls & REQUIRETLS_MSG ? OPTION_REQUIRETLS : 0)
+#endif
+ );
- /* Set for IGNOREQUOTA if the response to LHLO specifies support and the
- lmtp_ignore_quota option was set. */
+ /* Set for IGNOREQUOTA if the response to LHLO specifies support and the
+ lmtp_ignore_quota option was set. */
- igquotstr = (lmtp && ob->lmtp_ignore_quota &&
- pcre_exec(regex_IGNOREQUOTA, NULL, CS buffer, Ustrlen(CS buffer), 0,
- PCRE_EOPT, NULL, 0) >= 0)? US" IGNOREQUOTA" : US"";
+ sx->igquotstr = sx->peer_offered & OPTION_IGNQ ? US" IGNOREQUOTA" : US"";
- /* If the response to EHLO specified support for the SIZE parameter, note
- this, provided size_addition is non-negative. */
+ /* If the response to EHLO specified support for the SIZE parameter, note
+ this, provided size_addition is non-negative. */
- smtp_use_size = esmtp && ob->size_addition >= 0 &&
- pcre_exec(regex_SIZE, NULL, CS buffer, Ustrlen(CS buffer), 0,
- PCRE_EOPT, NULL, 0) >= 0;
+ smtp_peer_options |= sx->peer_offered & OPTION_SIZE;
- /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched
- the current host, esmtp will be false, so PIPELINING can never be used. If
- the current host matches hosts_avoid_pipelining, don't do it. */
+ /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched
+ the current host, esmtp will be false, so PIPELINING can never be used. If
+ the current host matches hosts_avoid_pipelining, don't do it. */
- smtp_use_pipelining = esmtp &&
- verify_check_this_host(&(ob->hosts_avoid_pipelining), NULL, host->name,
- host->address, NULL) != OK &&
- pcre_exec(regex_PIPELINING, NULL, CS buffer, Ustrlen(CS buffer), 0,
- PCRE_EOPT, NULL, 0) >= 0;
+ if ( sx->peer_offered & OPTION_PIPE
+ && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK)
+ smtp_peer_options |= OPTION_PIPE;
- DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
- smtp_use_pipelining? "" : "not ");
+ DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
+ smtp_peer_options & OPTION_PIPE ? "" : "not ");
- /* Note if the response to EHLO specifies support for the AUTH extension.
- If it has, check that this host is one we want to authenticate to, and do
- the business. The host name and address must be available when the
- authenticator's client driver is running. */
+ if ( sx->peer_offered & OPTION_CHUNKING
+ && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK)
+ sx->peer_offered &= ~OPTION_CHUNKING;
- smtp_authenticated = FALSE;
- require_auth = verify_check_this_host(&(ob->hosts_require_auth), NULL,
- host->name, host->address, NULL);
+ if (sx->peer_offered & OPTION_CHUNKING)
+ {DEBUG(D_transport) debug_printf("CHUNKING usable\n");}
- if (esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1))
- {
- uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]);
- expand_nmax = -1; /* reset */
+#ifndef DISABLE_PRDR
+ if ( sx->peer_offered & OPTION_PRDR
+ && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK)
+ sx->peer_offered &= ~OPTION_PRDR;
+
+ if (sx->peer_offered & OPTION_PRDR)
+ {DEBUG(D_transport) debug_printf("PRDR usable\n");}
+#endif
- /* Must not do this check until after we have saved the result of the
- regex match above. */
+ /* Note if the server supports DSN */
+ smtp_peer_options |= sx->peer_offered & OPTION_DSN;
+ DEBUG(D_transport) debug_printf("%susing DSN\n",
+ sx->peer_offered & OPTION_DSN ? "" : "not ");
- if (require_auth == OK ||
- verify_check_this_host(&(ob->hosts_try_auth), NULL, host->name,
- host->address, NULL) == OK)
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+ if (sx->peer_offered & OPTION_REQUIRETLS)
{
- auth_instance *au;
- fail_reason = US"no common mechanisms were found";
+ smtp_peer_options |= OPTION_REQUIRETLS;
+ DEBUG(D_transport) debug_printf(
+ tls_requiretls & REQUIRETLS_MSG
+ ? "using REQUIRETLS\n" : "REQUIRETLS offered\n");
+ }
+#endif
- DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n");
+ /* Note if the response to EHLO specifies support for the AUTH extension.
+ If it has, check that this host is one we want to authenticate to, and do
+ the business. The host name and address must be available when the
+ authenticator's client driver is running. */
- /* Scan the configured authenticators looking for one which is configured
- for use as a client and whose name matches an authentication mechanism
- supported by the server. If one is found, attempt to authenticate by
- calling its client function. */
+ switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host,
+ sx->ob, sx->esmtp, &sx->inblock, &sx->outblock))
+ {
+ default: goto SEND_QUIT;
+ case OK: break;
+ case FAIL_SEND: goto SEND_FAILED;
+ case FAIL: goto RESPONSE_FAILED;
+ }
+ }
+ }
+sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE);
- for (au = auths; !smtp_authenticated && au != NULL; au = au->next)
- {
- uschar *p = names;
- if (!au->client) continue;
+/* The setting up of the SMTP call is now complete. Any subsequent errors are
+message-specific. */
- /* Loop to scan supported server mechanisms */
+sx->setting_up = FALSE;
- while (*p != 0)
- {
- int rc;
- int len = Ustrlen(au->public_name);
- while (isspace(*p)) p++;
+#ifdef SUPPORT_I18N
+if (sx->addrlist->prop.utf8_msg)
+ {
+ uschar * s;
- if (strncmpic(au->public_name, p, len) != 0 ||
- (p[len] != 0 && !isspace(p[len])))
- {
- while (*p != 0 && !isspace(*p)) p++;
- continue;
- }
+ /* If the transport sets a downconversion mode it overrides any set by ACL
+ for the message. */
- /* Found data for a listed mechanism. Call its client entry. Set
- a flag in the outblock so that data is overwritten after sending so
- that reflections don't show it. */
+ if ((s = sx->ob->utf8_downconvert))
+ {
+ if (!(s = expand_string(s)))
+ {
+ message = string_sprintf("failed to expand utf8_downconvert: %s",
+ expand_string_message);
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
+ yield = DEFER;
+ goto SEND_QUIT;
+ }
+ switch (*s)
+ {
+ case '1': sx->addrlist->prop.utf8_downcvt = TRUE;
+ sx->addrlist->prop.utf8_downcvt_maybe = FALSE;
+ break;
+ case '0': sx->addrlist->prop.utf8_downcvt = FALSE;
+ sx->addrlist->prop.utf8_downcvt_maybe = FALSE;
+ break;
+ case '-': if (s[1] == '1')
+ {
+ sx->addrlist->prop.utf8_downcvt = FALSE;
+ sx->addrlist->prop.utf8_downcvt_maybe = TRUE;
+ }
+ break;
+ }
+ }
- fail_reason = US"authentication attempt(s) failed";
- outblock.authenticating = TRUE;
- rc = (au->info->clientcode)(au, &inblock, &outblock,
- ob->command_timeout, buffer, sizeof(buffer));
- outblock.authenticating = FALSE;
- DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n",
- au->name, rc);
+ sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt
+ && !sx->addrlist->prop.utf8_downcvt_maybe;
+ DEBUG(D_transport) if (!sx->utf8_needed)
+ debug_printf("utf8: %s downconvert\n",
+ sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
+ }
- /* A temporary authentication failure must hold up delivery to
- this host. After a permanent authentication failure, we carry on
- to try other authentication methods. If all fail hard, try to
- deliver the message unauthenticated unless require_auth was set. */
+/* If this is an international message we need the host to speak SMTPUTF8 */
+if (sx->utf8_needed && !(sx->peer_offered & OPTION_UTF8))
+ {
+ errno = ERRNO_UTF8_FWD;
+ goto RESPONSE_FAILED;
+ }
+#endif /*SUPPORT_I18N*/
- switch(rc)
- {
- case OK:
- smtp_authenticated = TRUE; /* stops the outer loop */
- break;
-
- /* Failure after writing a command */
-
- case FAIL_SEND:
- goto SEND_FAILED;
-
- /* Failure after reading a response */
-
- case FAIL:
- if (errno != 0 || buffer[0] != '5') goto RESPONSE_FAILED;
- log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s",
- au->name, host->name, host->address, buffer);
- break;
-
- /* Failure by some other means. In effect, the authenticator
- decided it wasn't prepared to handle this case. Typically this
- is the result of "fail" in an expansion string. Do we need to
- log anything here? Feb 2006: a message is now put in the buffer
- if logging is required. */
-
- case CANCELLED:
- if (*buffer != 0)
- log_write(0, LOG_MAIN, "%s authenticator cancelled "
- "authentication H=%s [%s] %s", au->name, host->name,
- host->address, buffer);
- break;
-
- /* Internal problem, message in buffer. */
-
- case ERROR:
- yield = ERROR;
- set_errno(addrlist, 0, string_copy(buffer), DEFER, FALSE);
- goto SEND_QUIT;
- }
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+ /*XXX should tls_requiretls actually be per-addr? */
- break; /* If not authenticated, try next authenticator */
- } /* Loop for scanning supported server mechanisms */
- } /* Loop for further authenticators */
- }
- }
+if ( tls_requiretls & REQUIRETLS_MSG
+ && !(sx->peer_offered & OPTION_REQUIRETLS)
+ )
+ {
+ sx->setting_up = TRUE;
+ errno = ERRNO_REQUIRETLS;
+ message = US"REQUIRETLS support is required from the server"
+ " but it was not offered";
+ DEBUG(D_transport) debug_printf("%s\n", message);
+ goto TLS_FAILED;
+ }
+#endif
+
+return OK;
- /* If we haven't authenticated, but are required to, give up. */
- if (require_auth == OK && !smtp_authenticated)
- {
+ {
+ int code;
+
+ RESPONSE_FAILED:
+ message = NULL;
+ sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno,
+ sx->buffer, &code, &message, &pass_message);
yield = DEFER;
- set_errno(addrlist, ERRNO_AUTHFAIL,
- string_sprintf("authentication required but %s", fail_reason), DEFER,
- FALSE);
- goto SEND_QUIT;
- }
+ goto FAILED;
+
+ SEND_FAILED:
+ code = '4';
+ message = US string_sprintf("send() to %s [%s] failed: %s",
+ sx->host->name, sx->host->address, strerror(errno));
+ sx->send_quit = FALSE;
+ yield = DEFER;
+ goto FAILED;
+
+ EHLOHELO_FAILED:
+ code = '4';
+ message = string_sprintf("Remote host closed connection in response to %s"
+ " (EHLO response was: %s)", smtp_command, sx->buffer);
+ sx->send_quit = FALSE;
+ yield = DEFER;
+ goto FAILED;
+
+ /* This label is jumped to directly when a TLS negotiation has failed,
+ or was not done for a host for which it is required. Values will be set
+ in message and errno, and setting_up will always be true. Treat as
+ a temporary error. */
+
+#ifdef SUPPORT_TLS
+ TLS_FAILED:
+# ifdef EXPERIMENTAL_REQUIRETLS
+ if (errno == ERRNO_REQUIRETLS)
+ code = '5', yield = FAIL;
+ /*XXX DSN will be labelled 500; prefer 530 5.7.4 */
+ else
+# endif
+ code = '4', yield = DEFER;
+ goto FAILED;
+#endif
+
+ /* The failure happened while setting up the call; see if the failure was
+ a 5xx response (this will either be on connection, or following HELO - a 5xx
+ after EHLO causes it to try HELO). If so, and there are no more hosts to try,
+ fail all addresses, as this host is never going to accept them. For other
+ errors during setting up (timeouts or whatever), defer all addresses, and
+ yield DEFER, so that the host is not tried again for a while.
+
+ XXX This peeking for another host feels like a layering violation. We want
+ to note the host as unusable, but down here we shouldn't know if this was
+ the last host to try for the addr(list). Perhaps the upper layer should be
+ the one to do set_errno() ? The problem is that currently the addr is where
+ errno etc. are stashed, but until we run out of hosts to try the errors are
+ host-specific. Maybe we should enhance the host_item definition? */
+
+FAILED:
+ sx->ok = FALSE; /* For when reached by GOTO */
+ set_errno(sx->addrlist, errno, message,
+ sx->host->next
+ ? DEFER
+ : code == '5'
+#ifdef SUPPORT_I18N
+ || errno == ERRNO_UTF8_FWD
+#endif
+ ? FAIL : DEFER,
+ pass_message, sx->host
+#ifdef EXPERIMENTAL_DSN_INFO
+ , sx->smtp_greeting, sx->helo_response
+#endif
+ );
}
-/* The setting up of the SMTP call is now complete. Any subsequent errors are
-message-specific. */
-setting_up = FALSE;
+SEND_QUIT:
-/* If there is a filter command specified for this transport, we can now
-set it up. This cannot be done until the identify of the host is known. */
+if (sx->send_quit)
+ (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n");
-if (tblock->filter_command != NULL)
+#ifdef SUPPORT_TLS
+if (sx->cctx.tls_ctx)
{
- BOOL rc;
- uschar buffer[64];
- sprintf(CS buffer, "%.50s transport", tblock->name);
- rc = transport_set_up_command(&transport_filter_argv, tblock->filter_command,
- TRUE, DEFER, addrlist, buffer, NULL);
+ tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
+ sx->cctx.tls_ctx = NULL;
+ }
+#endif
- /* On failure, copy the error to all addresses, abandon the SMTP call, and
- yield ERROR. */
+/* Close the socket, and return the appropriate value, first setting
+works because the NULL setting is passed back to the calling process, and
+remote_max_parallel is forced to 1 when delivering over an existing connection,
+*/
- if (!rc)
- {
- set_errno(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
- FALSE);
- yield = ERROR;
- goto SEND_QUIT;
- }
+HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
+if (sx->send_quit)
+ {
+ shutdown(sx->cctx.sock, SHUT_WR);
+ if (fcntl(sx->cctx.sock, F_SETFL, O_NONBLOCK) == 0)
+ for (rc = 16; read(sx->cctx.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;)
+ rc--; /* drain socket */
+ sx->send_quit = FALSE;
}
+(void)close(sx->cctx.sock);
+sx->cctx.sock = -1;
+#ifndef DISABLE_EVENT
+(void) event_raise(sx->tblock->event_action, US"tcp:close", NULL);
+#endif
-/* For messages that have more than the maximum number of envelope recipients,
-we want to send several transactions down the same SMTP connection. (See
-comments in deliver.c as to how this reconciles, heuristically, with
-remote_max_parallel.) This optimization was added to Exim after the following
-code was already working. The simplest way to put it in without disturbing the
-code was to use a goto to jump back to this point when there is another
-transaction to handle. */
+continue_transport = NULL;
+continue_hostname = NULL;
+return yield;
+}
-SEND_MESSAGE:
-sync_addr = first_addr;
-address_count = 0;
-ok = FALSE;
-send_rset = TRUE;
-completed_address = FALSE;
-/* Initiate a message transfer. If we know the receiving MTA supports the SIZE
-qualification, send it, adding something to the message size to allow for
-imprecision and things that get added en route. Exim keeps the number of lines
+
+/* Create the string of options that will be appended to the MAIL FROM:
+in the connection context buffer */
+
+static int
+build_mailcmd_options(smtp_context * sx, address_item * addrlist)
+{
+uschar * p = sx->buffer;
+address_item * addr;
+int address_count;
+
+*p = 0;
+
+/* If we know the receiving MTA supports the SIZE qualification, and we know it,
+send it, adding something to the message size to allow for imprecision
+and things that get added en route. Exim keeps the number of lines
in a message, so we can give an accurate value for the original message, but we
need some additional to handle added headers. (Double "." characters don't get
included in the count.) */
-p = buffer;
+if ( message_size > 0
+ && sx->peer_offered & OPTION_SIZE && !(sx->avoid_option & OPTION_SIZE))
+ {
+/*XXX problem here under spool_files_wireformat?
+Or just forget about lines? Or inflate by a fixed proportion? */
+
+ sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition);
+ while (*p) p++;
+ }
+
+#ifndef DISABLE_PRDR
+/* If it supports Per-Recipient Data Reponses, and we have omre than one recipient,
+request that */
+
+sx->prdr_active = FALSE;
+if (sx->peer_offered & OPTION_PRDR)
+ for (addr = addrlist; addr; addr = addr->next)
+ if (addr->transport_return == PENDING_DEFER)
+ {
+ for (addr = addr->next; addr; addr = addr->next)
+ if (addr->transport_return == PENDING_DEFER)
+ { /* at least two recipients to send */
+ sx->prdr_active = TRUE;
+ sprintf(CS p, " PRDR"); p += 5;
+ break;
+ }
+ break;
+ }
+#endif
+
+#ifdef SUPPORT_I18N
+/* If it supports internationalised messages, and this meesage need that,
+request it */
+
+if ( sx->peer_offered & OPTION_UTF8
+ && addrlist->prop.utf8_msg
+ && !addrlist->prop.utf8_downcvt
+ )
+ Ustrcpy(p, " SMTPUTF8"), p += 9;
+#endif
+
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+if (tls_requiretls & REQUIRETLS_MSG)
+ Ustrcpy(p, " REQUIRETLS") , p += 11;
+#endif
+
+/* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */
+for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0;
+ addr && address_count < sx->max_rcpt;
+ addr = addr->next) if (addr->transport_return == PENDING_DEFER)
+ {
+ address_count++;
+ if (!(addr->dsn_flags & rf_dsnlasthop))
+ {
+ sx->dsn_all_lasthop = FALSE;
+ break;
+ }
+ }
+
+/* Add any DSN flags to the mail command */
+
+if (sx->peer_offered & OPTION_DSN && !sx->dsn_all_lasthop)
+ {
+ if (dsn_ret == dsn_ret_hdrs)
+ { Ustrcpy(p, " RET=HDRS"); p += 9; }
+ else if (dsn_ret == dsn_ret_full)
+ { Ustrcpy(p, " RET=FULL"); p += 9; }
+
+ if (dsn_envid)
+ {
+ string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid);
+ while (*p) p++;
+ }
+ }
+
+/* If an authenticated_sender override has been specified for this transport
+instance, expand it. If the expansion is forced to fail, and there was already
+an authenticated_sender for this message, the original value will be used.
+Other expansion failures are serious. An empty result is ignored, but there is
+otherwise no check - this feature is expected to be used with LMTP and other
+cases where non-standard addresses (e.g. without domains) might be required. */
+
+if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob))
+ return ERROR;
+
+return OK;
+}
+
+
+static void
+build_rcptcmd_options(smtp_context * sx, const address_item * addr)
+{
+uschar * p = sx->buffer;
*p = 0;
-if (smtp_use_size)
+/* Add any DSN flags to the rcpt command */
+
+if (sx->peer_offered & OPTION_DSN && !(addr->dsn_flags & rf_dsnlasthop))
{
- sprintf(CS p, " SIZE=%d", message_size+message_linecount+ob->size_addition);
- while (*p) p++;
+ if (addr->dsn_flags & rf_dsnflags)
+ {
+ int i;
+ BOOL first = TRUE;
+
+ Ustrcpy(p, " NOTIFY=");
+ while (*p) p++;
+ for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i])
+ {
+ if (!first) *p++ = ',';
+ first = FALSE;
+ Ustrcpy(p, rf_names[i]);
+ while (*p) p++;
+ }
+ }
+
+ if (addr->dsn_orcpt)
+ {
+ string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s",
+ addr->dsn_orcpt);
+ while (*p) p++;
+ }
}
+}
-/* Add the authenticated sender address if present */
-if ((smtp_authenticated || ob->authenticated_sender_force) &&
- local_authenticated_sender != NULL)
+
+/*
+Return:
+ 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL)
+ -1 MAIL response error
+ -2 any non-MAIL read i/o error
+ -3 non-MAIL response timeout
+ -4 internal error; channel still usable
+ -5 transmit failed
+ */
+
+int
+smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield)
+{
+address_item * addr;
+int address_count;
+int rc;
+
+if (build_mailcmd_options(sx, sx->first_addr) != OK)
{
- string_format(p, sizeof(buffer) - (p-buffer), " AUTH=%s",
- auth_xtextencode(local_authenticated_sender,
- Ustrlen(local_authenticated_sender)));
+ *yield = ERROR;
+ return -4;
}
/* From here until we send the DATA command, we can make use of PIPELINING
When PIPELINING is off, each command written reports that it has flushed the
buffer. */
-pending_MAIL = TRUE; /* The block starts with MAIL */
+sx->pending_MAIL = TRUE; /* The block starts with MAIL */
+
+ {
+ uschar * s = sx->from_addr;
+#ifdef SUPPORT_I18N
+ uschar * errstr = NULL;
+
+ /* If we must downconvert, do the from-address here. Remember we had to
+ for the to-addresses (done below), and also (ugly) for re-doing when building
+ the delivery log line. */
+
+ if ( sx->addrlist->prop.utf8_msg
+ && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & OPTION_UTF8))
+ )
+ {
+ if (s = string_address_utf8_to_alabel(s, &errstr), errstr)
+ {
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
+ *yield = ERROR;
+ return -4;
+ }
+ setflag(sx->addrlist, af_utf8_downcvt);
+ }
+#endif
+
+ rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH,
+ "MAIL FROM:<%s>%s\r\n", s, sx->buffer);
+ }
+
+mail_command = string_copy(big_buffer); /* Save for later error message */
+
+switch(rc)
+ {
+ case -1: /* Transmission error */
+ return -5;
+
+ case +1: /* Cmd was sent */
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
+ sx->ob->command_timeout))
+ {
+ if (errno == 0 && sx->buffer[0] == '4')
+ {
+ errno = ERRNO_MAIL4XX;
+ sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
+ }
+ return -1;
+ }
+ sx->pending_MAIL = FALSE;
+ break;
+
+ /* otherwise zero: command queued for pipeline */
+ }
+
+/* Pass over all the relevant recipient addresses for this host, which are the
+ones that have status PENDING_DEFER. If we are using PIPELINING, we can send
+several before we have to read the responses for those seen so far. This
+checking is done by a subroutine because it also needs to be done at the end.
+Send only up to max_rcpt addresses at a time, leaving next_addr pointing to
+the next one if not all are sent.
+
+In the MUA wrapper situation, we want to flush the PIPELINING buffer for the
+last address because we want to abort if any recipients have any kind of
+problem, temporary or permanent. We know that all recipient addresses will have
+the PENDING_DEFER status, because only one attempt is ever made, and we know
+that max_rcpt will be large, so all addresses will be done at once.
+
+For verify we flush the pipeline after any (the only) rcpt address. */
+
+for (addr = sx->first_addr, address_count = 0;
+ addr && address_count < sx->max_rcpt;
+ addr = addr->next) if (addr->transport_return == PENDING_DEFER)
+ {
+ int count;
+ BOOL no_flush;
+ uschar * rcpt_addr;
+
+ if (tcp_out_fastopen && !tcp_out_fastopen_logged)
+ {
+ setflag(addr, af_tcp_fastopen_conn);
+ if (tcp_out_fastopen > 1) setflag(addr, af_tcp_fastopen);
+ }
+
+ addr->dsn_aware = sx->peer_offered & OPTION_DSN
+ ? dsn_support_yes : dsn_support_no;
+
+ address_count++;
+ no_flush = pipelining_active && !sx->verify
+ && (!mua_wrapper || addr->next && address_count < sx->max_rcpt);
+
+ build_rcptcmd_options(sx, addr);
+
+ /* Now send the RCPT command, and process outstanding responses when
+ necessary. After a timeout on RCPT, we just end the function, leaving the
+ yield as OK, because this error can often mean that there is a problem with
+ just one address, so we don't want to delay the host. */
+
+ rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes);
+
+#ifdef SUPPORT_I18N
+ if ( testflag(sx->addrlist, af_utf8_downcvt)
+ && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL))
+ )
+ {
+ /*XXX could we use a per-address errstr here? Not fail the whole send? */
+ errno = ERRNO_EXPANDFAIL;
+ return -5; /*XXX too harsh? */
+ }
+#endif
+
+ count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH,
+ "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer);
+
+ if (count < 0) return -5;
+ if (count > 0)
+ {
+ switch(sync_responses(sx, count, 0))
+ {
+ case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */
+ case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
+ break;
+
+ case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
+ if (!sx->lmtp) /* can't tell about progress yet */
+ sx->completed_addr = TRUE;
+ case 0: /* No 2xx or 5xx, but no probs */
+ break;
+
+ case -1: return -3; /* Timeout on RCPT */
+ case -2: return -2; /* non-MAIL read i/o error */
+ default: return -1; /* any MAIL error */
+ }
+ sx->pending_MAIL = FALSE; /* Dealt with MAIL */
+ }
+ } /* Loop for next address */
+
+tcp_out_fastopen_logged = TRUE;
+sx->next_addr = addr;
+return 0;
+}
+
+
+#ifdef SUPPORT_TLS
+/*****************************************************
+* Proxy TLS connection for another transport process *
+******************************************************/
+/*
+Close the unused end of the pipe, fork once more, then use the given buffer
+as a staging area, and select on both the given fd and the TLS'd client-fd for
+data to read (per the coding in ip_recv() and fd_ready() this is legitimate).
+Do blocking full-size writes, and reads under a timeout. Once both input
+channels are closed, exit the process.
+
+Arguments:
+ ct_ctx tls context
+ buf space to use for buffering
+ bufsiz size of buffer
+ pfd pipe filedescriptor array; [0] is comms to proxied process
+ timeout per-read timeout, seconds
+*/
+
+void
+smtp_proxy_tls(void * ct_ctx, uschar * buf, size_t bsize, int * pfd,
+ int timeout)
+{
+fd_set rfds, efds;
+int max_fd = MAX(pfd[0], tls_out.active.sock) + 1;
+int rc, i, fd_bits, nbytes;
+
+close(pfd[1]);
+if ((rc = fork()))
+ {
+ DEBUG(D_transport) debug_printf("proxy-proc final-pid %d\n", rc);
+ _exit(rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+ }
+
+if (running_in_test_harness) millisleep(100); /* let parent debug out */
+set_process_info("proxying TLS connection for continued transport");
+FD_ZERO(&rfds);
+FD_SET(tls_out.active.sock, &rfds);
+FD_SET(pfd[0], &rfds);
+
+for (fd_bits = 3; fd_bits; )
+ {
+ time_t time_left = timeout;
+ time_t time_start = time(NULL);
+
+ /* wait for data */
+ efds = rfds;
+ do
+ {
+ struct timeval tv = { time_left, 0 };
+
+ rc = select(max_fd,
+ (SELECT_ARG2_TYPE *)&rfds, NULL, (SELECT_ARG2_TYPE *)&efds, &tv);
+
+ if (rc < 0 && errno == EINTR)
+ if ((time_left -= time(NULL) - time_start) > 0) continue;
+
+ if (rc <= 0)
+ {
+ DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__);
+ goto done;
+ }
+
+ if (FD_ISSET(tls_out.active.sock, &efds) || FD_ISSET(pfd[0], &efds))
+ {
+ DEBUG(D_transport) debug_printf("select: exceptional cond on %s fd\n",
+ FD_ISSET(pfd[0], &efds) ? "proxy" : "tls");
+ goto done;
+ }
+ }
+ while (rc < 0 || !(FD_ISSET(tls_out.active.sock, &rfds) || FD_ISSET(pfd[0], &rfds)));
+
+ /* handle inbound data */
+ if (FD_ISSET(tls_out.active.sock, &rfds))
+ if ((rc = tls_read(ct_ctx, buf, bsize)) <= 0)
+ {
+ fd_bits &= ~1;
+ FD_CLR(tls_out.active.sock, &rfds);
+ shutdown(pfd[0], SHUT_WR);
+ timeout = 5;
+ }
+ else
+ {
+ for (nbytes = 0; rc - nbytes > 0; nbytes += i)
+ if ((i = write(pfd[0], buf + nbytes, rc - nbytes)) < 0) goto done;
+ }
+ else if (fd_bits & 1)
+ FD_SET(tls_out.active.sock, &rfds);
+
+ /* handle outbound data */
+ if (FD_ISSET(pfd[0], &rfds))
+ if ((rc = read(pfd[0], buf, bsize)) <= 0)
+ {
+ fd_bits = 0;
+ tls_close(ct_ctx, TLS_SHUTDOWN_NOWAIT);
+ ct_ctx = NULL;
+ }
+ else
+ {
+ for (nbytes = 0; rc - nbytes > 0; nbytes += i)
+ if ((i = tls_write(ct_ctx, buf + nbytes, rc - nbytes, FALSE)) < 0)
+ goto done;
+ }
+ else if (fd_bits & 2)
+ FD_SET(pfd[0], &rfds);
+ }
+
+done:
+ if (running_in_test_harness) millisleep(100); /* let logging complete */
+ exim_exit(0, US"TLS proxy");
+}
+#endif
+
+
+/*************************************************
+* Deliver address list to given host *
+*************************************************/
+
+/* If continue_hostname is not null, we get here only when continuing to
+deliver down an existing channel. The channel was passed as the standard
+input. TLS is never active on a passed channel; the previous process always
+closes it down before passing the connection on.
+
+Otherwise, we have to make a connection to the remote host, and do the
+initial protocol exchange.
+
+When running as an MUA wrapper, if the sender or any recipient is rejected,
+temporarily or permanently, we force failure for all recipients.
+
+Arguments:
+ addrlist chain of potential addresses to deliver; only those whose
+ transport_return field is set to PENDING_DEFER are currently
+ being processed; others should be skipped - they have either
+ been delivered to an earlier host or IP address, or been
+ failed by one of them.
+ host host to deliver to
+ host_af AF_INET or AF_INET6
+ defport default TCP/IP port to use if host does not specify, in host
+ byte order
+ interface interface to bind to, or NULL
+ tblock transport instance block
+ message_defer set TRUE if yield is OK, but all addresses were deferred
+ because of a non-recipient, non-host failure, that is, a
+ 4xx response to MAIL FROM, DATA, or ".". This is a defer
+ that is specific to the message.
+ suppress_tls if TRUE, don't attempt a TLS connection - this is set for
+ a second attempt after TLS initialization fails
+
+Returns: OK - the connection was made and the delivery attempted;
+ the result for each address is in its data block.
+ DEFER - the connection could not be made, or something failed
+ while setting up the SMTP session, or there was a
+ non-message-specific error, such as a timeout.
+ ERROR - a filter command is specified for this transport,
+ and there was a problem setting it up; OR helo_data
+ or add_headers or authenticated_sender is specified
+ for this transport, and the string failed to expand
+*/
+
+static int
+smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport,
+ uschar *interface, transport_instance *tblock,
+ BOOL *message_defer, BOOL suppress_tls)
+{
+address_item *addr;
+int yield = OK;
+int save_errno;
+int rc;
+struct timeval start_delivery_time;
+
+BOOL pass_message = FALSE;
+uschar *message = NULL;
+uschar new_message_id[MESSAGE_ID_LENGTH + 1];
+
+smtp_context sx;
+
+gettimeofday(&start_delivery_time, NULL);
+suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
+*message_defer = FALSE;
+
+sx.addrlist = addrlist;
+sx.host = host;
+sx.host_af = host_af,
+sx.port = defport;
+sx.interface = interface;
+sx.helo_data = NULL;
+sx.tblock = tblock;
+sx.verify = FALSE;
-rc = smtp_write_command(&outblock, smtp_use_pipelining,
- "MAIL FROM:<%s>%s\r\n", return_path, buffer);
-mail_command = string_copy(big_buffer); /* Save for later error message */
+/* Get the channel set up ready for a message (MAIL FROM being the next
+SMTP command to send */
-switch(rc)
+if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK)
+ return rc;
+
+/* If there is a filter command specified for this transport, we can now
+set it up. This cannot be done until the identify of the host is known. */
+
+if (tblock->filter_command)
{
- case -1: /* Transmission error */
- goto SEND_FAILED;
+ transport_filter_timeout = tblock->filter_timeout;
- case +1: /* Block was sent */
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout))
+ /* On failure, copy the error to all addresses, abandon the SMTP call, and
+ yield ERROR. */
+
+ if (!transport_set_up_command(&transport_filter_argv,
+ tblock->filter_command, TRUE, DEFER, addrlist,
+ string_sprintf("%.50s transport", tblock->name), NULL))
{
- if (errno == 0 && buffer[0] == '4')
- {
- errno = ERRNO_MAIL4XX;
- addrlist->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
- }
- goto RESPONSE_FAILED;
+ set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
+ FALSE);
+ yield = ERROR;
+ goto SEND_QUIT;
+ }
+
+ if ( transport_filter_argv
+ && *transport_filter_argv
+ && **transport_filter_argv
+ && sx.peer_offered & OPTION_CHUNKING
+ )
+ {
+ sx.peer_offered &= ~OPTION_CHUNKING;
+ DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
}
- pending_MAIL = FALSE;
- break;
}
-/* Pass over all the relevant recipient addresses for this host, which are the
-ones that have status PENDING_DEFER. If we are using PIPELINING, we can send
-several before we have to read the responses for those seen so far. This
-checking is done by a subroutine because it also needs to be done at the end.
-Send only up to max_rcpt addresses at a time, leaving first_addr pointing to
-the next one if not all are sent.
+sx.first_addr = addrlist;
-In the MUA wrapper situation, we want to flush the PIPELINING buffer for the
-last address because we want to abort if any recipients have any kind of
-problem, temporary or permanent. We know that all recipient addresses will have
-the PENDING_DEFER status, because only one attempt is ever made, and we know
-that max_rcpt will be large, so all addresses will be done at once. */
+/* For messages that have more than the maximum number of envelope recipients,
+we want to send several transactions down the same SMTP connection. (See
+comments in deliver.c as to how this reconciles, heuristically, with
+remote_max_parallel.) This optimization was added to Exim after the following
+code was already working. The simplest way to put it in without disturbing the
+code was to use a goto to jump back to this point when there is another
+transaction to handle. */
-for (addr = first_addr;
- address_count < max_rcpt && addr != NULL;
- addr = addr->next)
- {
- int count;
- BOOL no_flush;
+SEND_MESSAGE:
+sx.from_addr = return_path;
+sx.sync_addr = sx.first_addr;
+sx.ok = FALSE;
+sx.send_rset = TRUE;
+sx.completed_addr = FALSE;
- if (addr->transport_return != PENDING_DEFER) continue;
- address_count++;
- no_flush = smtp_use_pipelining && (!mua_wrapper || addr->next != NULL);
+/* If we are a continued-connection-after-verify the MAIL and RCPT
+commands were already sent; do not re-send but do mark the addrs as
+having been accepted up to RCPT stage. A traditional cont-conn
+always has a sequence number greater than one. */
- /* Now send the RCPT command, and process outstanding responses when
- necessary. After a timeout on RCPT, we just end the function, leaving the
- yield as OK, because this error can often mean that there is a problem with
- just one address, so we don't want to delay the host. */
+if (continue_hostname && continue_sequence == 1)
+ {
+ address_item * addr;
- count = smtp_write_command(&outblock, no_flush, "RCPT TO:<%s>%s\r\n",
- transport_rcpt_address(addr, tblock->rcpt_include_affixes), igquotstr);
- if (count < 0) goto SEND_FAILED;
- if (count > 0)
- {
- switch(sync_responses(first_addr, tblock->rcpt_include_affixes,
- &sync_addr, host, count, ob->address_retry_include_sender,
- pending_MAIL, 0, &inblock, ob->command_timeout, buffer,
- sizeof(buffer)))
- {
- case 3: ok = TRUE; /* 2xx & 5xx => OK & progress made */
- case 2: completed_address = TRUE; /* 5xx (only) => progress made */
- break;
+ sx.peer_offered = smtp_peer_options;
+ sx.pending_MAIL = FALSE;
+ sx.ok = TRUE;
+ sx.next_addr = NULL;
- case 1: ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
- if (!lmtp) completed_address = TRUE; /* can't tell about progress yet */
- case 0: /* No 2xx or 5xx, but no probs */
- break;
+ for (addr = addrlist; addr; addr = addr->next)
+ addr->transport_return = PENDING_OK;
+ }
+else
+ {
+ /* Initiate a message transfer. */
- case -1: goto END_OFF; /* Timeout on RCPT */
- default: goto RESPONSE_FAILED; /* I/O error, or any MAIL error */
- }
- pending_MAIL = FALSE; /* Dealt with MAIL */
+ switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield))
+ {
+ case 0: break;
+ case -1: case -2: goto RESPONSE_FAILED;
+ case -3: goto END_OFF;
+ case -4: goto SEND_QUIT;
+ default: goto SEND_FAILED;
}
- } /* Loop for next address */
-/* If we are an MUA wrapper, abort if any RCPTs were rejected, either
-permanently or temporarily. We should have flushed and synced after the last
-RCPT. */
+ /* If we are an MUA wrapper, abort if any RCPTs were rejected, either
+ permanently or temporarily. We should have flushed and synced after the last
+ RCPT. */
-if (mua_wrapper)
- {
- address_item *badaddr;
- for (badaddr = first_addr; badaddr != NULL; badaddr = badaddr->next)
- {
- if (badaddr->transport_return != PENDING_OK) break;
- }
- if (badaddr != NULL)
+ if (mua_wrapper)
{
- set_errno(addrlist, 0, badaddr->message, FAIL,
- testflag(badaddr, af_pass_message));
- ok = FALSE;
+ address_item * a;
+ unsigned cnt;
+
+ for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++)
+ if (a->transport_return != PENDING_OK)
+ {
+ /*XXX could we find a better errno than 0 here? */
+ set_errno_nohost(addrlist, 0, a->message, FAIL,
+ testflag(a, af_pass_message));
+ sx.ok = FALSE;
+ break;
+ }
}
}
send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still
have a good recipient buffered up if we are pipelining. We don't want to waste
time sending DATA needlessly, so we only send it if either ok is TRUE or if we
-are pipelining. The responses are all handled by sync_responses(). */
+are pipelining. The responses are all handled by sync_responses().
+If using CHUNKING, do not send a BDAT until we know how big a chunk we want
+to send is. */
-if (ok || (smtp_use_pipelining && !mua_wrapper))
+if ( !(sx.peer_offered & OPTION_CHUNKING)
+ && (sx.ok || (pipelining_active && !mua_wrapper)))
{
- int count = smtp_write_command(&outblock, FALSE, "DATA\r\n");
+ int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n");
+
if (count < 0) goto SEND_FAILED;
- switch(sync_responses(first_addr, tblock->rcpt_include_affixes, &sync_addr,
- host, count, ob->address_retry_include_sender, pending_MAIL,
- ok? +1 : -1, &inblock, ob->command_timeout, buffer, sizeof(buffer)))
+ switch(sync_responses(&sx, count, sx.ok ? +1 : -1))
{
- case 3: ok = TRUE; /* 2xx & 5xx => OK & progress made */
- case 2: completed_address = TRUE; /* 5xx (only) => progress made */
+ case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
+ case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
break;
- case 1: ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
- if (!lmtp) completed_address = TRUE; /* can't tell about progress yet */
+ case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
+ if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
case 0: break; /* No 2xx or 5xx, but no probs */
case -1: goto END_OFF; /* Timeout on RCPT */
default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
}
+ pipelining_active = FALSE;
+ data_command = string_copy(big_buffer); /* Save for later error message */
}
-/* Save the first address of the next batch. */
-
-first_addr = addr;
-
/* If there were no good recipients (but otherwise there have been no
problems), just set ok TRUE, since we have handled address-specific errors
already. Otherwise, it's OK to send the message. Use the check/escape mechanism
well as body. Set the appropriate timeout value to be used for each chunk.
(Haven't been able to make it work using select() for writing yet.) */
-if (!ok) ok = TRUE; else
+if (!(sx.peer_offered & OPTION_CHUNKING) && !sx.ok)
+ {
+ /* Save the first address of the next batch. */
+ sx.first_addr = sx.next_addr;
+
+ sx.ok = TRUE;
+ }
+else
{
+ transport_ctx tctx = {
+ {sx.cctx.sock}, /*XXX will this need TLS info? */
+ tblock,
+ addrlist,
+ US".", US"..", /* Escaping strings */
+ topt_use_crlf | topt_escape_headers
+ | (tblock->body_only ? topt_no_headers : 0)
+ | (tblock->headers_only ? topt_no_body : 0)
+ | (tblock->return_path_add ? topt_add_return_path : 0)
+ | (tblock->delivery_date_add ? topt_add_delivery_date : 0)
+ | (tblock->envelope_to_add ? topt_add_envelope_to : 0)
+ };
+
+ /* If using CHUNKING we need a callback from the generic transport
+ support to us, for the sending of BDAT smtp commands and the reaping
+ of responses. The callback needs a whole bunch of state so set up
+ a transport-context structure to be passed around. */
+
+ if (sx.peer_offered & OPTION_CHUNKING)
+ {
+ tctx.check_string = tctx.escape_string = NULL;
+ tctx.options |= topt_use_bdat;
+ tctx.chunk_cb = smtp_chunk_cmd_callback;
+ sx.pending_BDAT = FALSE;
+ sx.good_RCPT = sx.ok;
+ sx.cmd_count = 0;
+ tctx.smtp_context = &sx;
+ }
+ else
+ tctx.options |= topt_end_dot;
+
+ /* Save the first address of the next batch. */
+ sx.first_addr = sx.next_addr;
+
+ /* Responses from CHUNKING commands go in buffer. Otherwise,
+ there has not been a response. */
+
+ sx.buffer[0] = 0;
+
sigalrm_seen = FALSE;
- transport_write_timeout = ob->data_timeout;
+ transport_write_timeout = sx.ob->data_timeout;
smtp_command = US"sending data block"; /* For error messages */
DEBUG(D_transport|D_v)
- debug_printf(" SMTP>> writing message and terminating \".\"\n");
+ if (sx.peer_offered & OPTION_CHUNKING)
+ debug_printf(" will write message using CHUNKING\n");
+ else
+ debug_printf(" SMTP>> writing message and terminating \".\"\n");
transport_count = 0;
-#ifdef EXPERIMENTAL_DOMAINKEYS
- if ( (ob->dk_private_key != NULL) && (ob->dk_selector != NULL) )
- ok = dk_transport_write_message(addrlist, inblock.sock,
- topt_use_crlf | topt_end_dot | topt_escape_headers |
- (tblock->body_only? topt_no_headers : 0) |
- (tblock->headers_only? topt_no_body : 0) |
- (tblock->return_path_add? topt_add_return_path : 0) |
- (tblock->delivery_date_add? topt_add_delivery_date : 0) |
- (tblock->envelope_to_add? topt_add_envelope_to : 0),
- 0, /* No size limit */
- tblock->add_headers, tblock->remove_headers,
- US".", US"..", /* Escaping strings */
- tblock->rewrite_rules, tblock->rewrite_existflags,
- ob->dk_private_key, ob->dk_domain, ob->dk_selector,
- ob->dk_canon, ob->dk_headers, ob->dk_strict);
- else
+
+#ifndef DISABLE_DKIM
+ dkim_exim_sign_init();
+# ifdef EXPERIMENTAL_ARC
+ {
+ uschar * s = sx.ob->arc_sign;
+ if (s)
+ {
+ if (!(sx.ob->dkim.arc_signspec = s = expand_string(s)))
+ {
+ if (!expand_string_forcedfail)
+ {
+ message = US"failed to expand arc_sign";
+ sx.ok = FALSE;
+ goto SEND_FAILED;
+ }
+ }
+ else if (*s)
+ {
+ /* Ask dkim code to hash the body for ARC */
+ (void) arc_ams_setup_sign_bodyhash();
+ sx.ob->dkim.force_bodyhash = TRUE;
+ }
+ }
+ }
+# endif
+ sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message);
+#else
+ sx.ok = transport_write_message(&tctx, 0);
#endif
- ok = transport_write_message(addrlist, inblock.sock,
- topt_use_crlf | topt_end_dot | topt_escape_headers |
- (tblock->body_only? topt_no_headers : 0) |
- (tblock->headers_only? topt_no_body : 0) |
- (tblock->return_path_add? topt_add_return_path : 0) |
- (tblock->delivery_date_add? topt_add_delivery_date : 0) |
- (tblock->envelope_to_add? topt_add_envelope_to : 0),
- 0, /* No size limit */
- tblock->add_headers, tblock->remove_headers,
- US".", US"..", /* Escaping strings */
- tblock->rewrite_rules, tblock->rewrite_existflags);
/* transport_write_message() uses write() because it is called from other
places to write to non-sockets. This means that under some OS (e.g. Solaris)
transport_write_timeout = 0; /* for subsequent transports */
/* Failure can either be some kind of I/O disaster (including timeout),
- or the failure of a transport filter or the expansion of added headers. */
+ or the failure of a transport filter or the expansion of added headers.
+ Or, when CHUNKING, it can be a protocol-detected failure. */
- if (!ok)
- {
- buffer[0] = 0; /* There hasn't been a response */
- goto RESPONSE_FAILED;
- }
+ if (!sx.ok)
+ if (message) goto SEND_FAILED;
+ else goto RESPONSE_FAILED;
/* We used to send the terminating "." explicitly here, but because of
buffering effects at both ends of TCP/IP connections, you don't gain
smtp_command = US"end of data";
- /* For SMTP, we now read a single response that applies to the whole message.
- If it is OK, then all the addresses have been delivered. */
+ if (sx.peer_offered & OPTION_CHUNKING && sx.cmd_count > 1)
+ {
+ /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */
+ switch(sync_responses(&sx, sx.cmd_count-1, 0))
+ {
+ case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
+ case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
+ break;
+
+ case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
+ if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
+ case 0: break; /* No 2xx or 5xx, but no probs */
+
+ case -1: goto END_OFF; /* Timeout on RCPT */
+ default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
+ }
+ }
+
+#ifndef DISABLE_PRDR
+ /* For PRDR we optionally get a partial-responses warning
+ * followed by the individual responses, before going on with
+ * the overall response. If we don't get the warning then deal
+ * with per non-PRDR. */
+ if(sx.prdr_active)
+ {
+ sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3',
+ sx.ob->final_timeout);
+ if (!sx.ok && errno == 0) switch(sx.buffer[0])
+ {
+ case '2': sx.prdr_active = FALSE;
+ sx.ok = TRUE;
+ break;
+ case '4': errno = ERRNO_DATA4XX;
+ addrlist->more_errno |=
+ ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
+ break;
+ }
+ }
+ else
+#endif
+
+ /* For non-PRDR SMTP, we now read a single response that applies to the
+ whole message. If it is OK, then all the addresses have been delivered. */
- if (!lmtp)
+ if (!sx.lmtp)
{
- ok = smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->final_timeout);
- if (!ok && errno == 0 && buffer[0] == '4')
+ sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
+ sx.ob->final_timeout);
+ if (!sx.ok && errno == 0 && sx.buffer[0] == '4')
{
errno = ERRNO_DATA4XX;
- addrlist->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
}
}
software before the spool gets updated. Also record the final SMTP
confirmation if needed (for SMTP only). */
- if (ok)
+ if (sx.ok)
{
int flag = '=';
- int delivery_time = (int)(time(NULL) - start_delivery_time);
+ struct timeval delivery_time;
int len;
- host_item *thost;
- uschar *conf = NULL;
- send_rset = FALSE;
-
- /* Make a copy of the host if it is local to this invocation
- of the transport. */
+ uschar * conf = NULL;
- if (copy_host)
- {
- thost = store_get(sizeof(host_item));
- *thost = *host;
- thost->name = string_copy(host->name);
- thost->address = string_copy(host->address);
- }
- else thost = host;
+ timesince(&delivery_time, &start_delivery_time);
+ sx.send_rset = FALSE;
+ pipelining_active = FALSE;
/* Set up confirmation if needed - applies only to SMTP */
- if ((log_extra_selector & LX_smtp_confirmation) != 0 && !lmtp)
+ if (
+#ifdef DISABLE_EVENT
+ LOGGING(smtp_confirmation) &&
+#endif
+ !sx.lmtp
+ )
{
- uschar *s = string_printing(buffer);
- conf = (s == buffer)? (uschar *)string_copy(s) : s;
+ const uschar *s = string_printing(sx.buffer);
+ /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
+ conf = (s == sx.buffer)? US string_copy(s) : US s;
}
- /* Process all transported addresses - for LMTP, read a status for
+ /* Process all transported addresses - for LMTP or PRDR, read a status for
each one. */
- for (addr = addrlist; addr != first_addr; addr = addr->next)
+ for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
{
if (addr->transport_return != PENDING_OK) continue;
address. For temporary errors, add a retry item for the address so that
it doesn't get tried again too soon. */
- if (lmtp)
+#ifndef DISABLE_PRDR
+ if (sx.lmtp || sx.prdr_active)
+#else
+ if (sx.lmtp)
+#endif
{
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->final_timeout))
+ if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
+ sx.ob->final_timeout))
{
- if (errno != 0 || buffer[0] == 0) goto RESPONSE_FAILED;
- addr->message = string_sprintf("LMTP error after %s: %s",
- big_buffer, string_printing(buffer));
+ if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED;
+ addr->message = string_sprintf(
+#ifndef DISABLE_PRDR
+ "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP",
+#else
+ "LMTP error after %s: %s",
+#endif
+ data_command, string_printing(sx.buffer));
setflag(addr, af_pass_message); /* Allow message to go to user */
- if (buffer[0] == '5')
+ if (sx.buffer[0] == '5')
addr->transport_return = FAIL;
else
{
errno = ERRNO_DATA4XX;
- addr->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
addr->transport_return = DEFER;
- retry_add_item(addr, addr->address_retry_key, 0);
+#ifndef DISABLE_PRDR
+ if (!sx.prdr_active)
+#endif
+ retry_add_item(addr, addr->address_retry_key, 0);
}
continue;
}
- completed_address = TRUE; /* NOW we can set this flag */
+ sx.completed_addr = TRUE; /* NOW we can set this flag */
+ if (LOGGING(smtp_confirmation))
+ {
+ const uschar *s = string_printing(sx.buffer);
+ /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
+ conf = (s == sx.buffer) ? US string_copy(s) : US s;
+ }
}
/* SMTP, or success return from LMTP for this address. Pass back the
actual host that was used. */
addr->transport_return = OK;
- addr->more_errno = delivery_time;
- addr->host_used = thost;
+ addr->more_errno = delivery_time.tv_sec;
+ addr->delivery_usec = delivery_time.tv_usec;
+ addr->host_used = host;
addr->special_action = flag;
addr->message = conf;
+
+ if (sx.pipelining_used) setflag(addr, af_pipelining);
+#ifndef DISABLE_PRDR
+ if (sx.prdr_active) setflag(addr, af_prdr_used);
+#endif
+ if (sx.peer_offered & OPTION_CHUNKING) setflag(addr, af_chunking_used);
flag = '-';
- /* Update the journal. For homonymic addresses, use the base address plus
- the transport name. See lots of comments in deliver.c about the reasons
- for the complications when homonyms are involved. Just carry on after
- write error, as it may prove possible to update the spool file later. */
+#ifndef DISABLE_PRDR
+ if (!sx.prdr_active)
+#endif
+ {
+ /* Update the journal. For homonymic addresses, use the base address plus
+ the transport name. See lots of comments in deliver.c about the reasons
+ for the complications when homonyms are involved. Just carry on after
+ write error, as it may prove possible to update the spool file later. */
+
+ if (testflag(addr, af_homonym))
+ sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
+ else
+ sprintf(CS sx.buffer, "%.500s\n", addr->unique);
+
+ DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer);
+ len = Ustrlen(CS sx.buffer);
+ if (write(journal_fd, sx.buffer, len) != len)
+ log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
+ "%s: %s", sx.buffer, strerror(errno));
+ }
+ }
+
+#ifndef DISABLE_PRDR
+ if (sx.prdr_active)
+ {
+ const uschar * overall_message;
- if (testflag(addr, af_homonym))
- sprintf(CS buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
- else
- sprintf(CS buffer, "%.500s\n", addr->unique);
+ /* PRDR - get the final, overall response. For any non-success
+ upgrade all the address statuses. */
- DEBUG(D_deliver) debug_printf("journalling %s", buffer);
- len = Ustrlen(CS buffer);
- if (write(journal_fd, buffer, len) != len)
- log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
- "%s: %s", buffer, strerror(errno));
- }
+ sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
+ sx.ob->final_timeout);
+ if (!sx.ok)
+ {
+ if(errno == 0 && sx.buffer[0] == '4')
+ {
+ errno = ERRNO_DATA4XX;
+ addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
+ }
+ for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
+ if (sx.buffer[0] == '5' || addr->transport_return == OK)
+ addr->transport_return = PENDING_OK; /* allow set_errno action */
+ goto RESPONSE_FAILED;
+ }
+
+ /* Append the overall response to the individual PRDR response for logging
+ and update the journal, or setup retry. */
+
+ overall_message = string_printing(sx.buffer);
+ for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
+ if (addr->transport_return == OK)
+ addr->message = string_sprintf("%s\\n%s", addr->message, overall_message);
+
+ for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
+ if (addr->transport_return == OK)
+ {
+ if (testflag(addr, af_homonym))
+ sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
+ else
+ sprintf(CS sx.buffer, "%.500s\n", addr->unique);
+
+ DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer);
+ len = Ustrlen(CS sx.buffer);
+ if (write(journal_fd, sx.buffer, len) != len)
+ log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
+ "%s: %s", sx.buffer, strerror(errno));
+ }
+ else if (addr->transport_return == DEFER)
+ retry_add_item(addr, addr->address_retry_key, -2);
+ }
+#endif
/* Ensure the journal file is pushed out to disk. */
here during the setting up phase (i.e. before MAIL FROM) then always defer, as
the problem is not related to this specific message. */
-if (!ok)
+if (!sx.ok)
{
- int code;
+ int code, set_rc;
+ uschar * set_message;
RESPONSE_FAILED:
- save_errno = errno;
- message = NULL;
- send_quit = check_response(host, &save_errno, addrlist->more_errno,
- buffer, &code, &message, &pass_message);
- goto FAILED;
+ {
+ save_errno = errno;
+ message = NULL;
+ sx.send_quit = check_response(host, &save_errno, addrlist->more_errno,
+ sx.buffer, &code, &message, &pass_message);
+ goto FAILED;
+ }
SEND_FAILED:
- save_errno = errno;
- code = '4';
- message = US string_sprintf("send() to %s [%s] failed: %s",
- host->name, host->address, strerror(save_errno));
- send_quit = FALSE;
- goto FAILED;
-
- /* This label is jumped to directly when a TLS negotiation has failed,
- or was not done for a host for which it is required. Values will be set
- in message and save_errno, and setting_up will always be true. Treat as
- a temporary error. */
-
- #ifdef SUPPORT_TLS
- TLS_FAILED:
- code = '4';
- #endif
-
- /* If the failure happened while setting up the call, see if the failure was
- a 5xx response (this will either be on connection, or following HELO - a 5xx
- after EHLO causes it to try HELO). If so, fail all addresses, as this host is
- never going to accept them. For other errors during setting up (timeouts or
- whatever), defer all addresses, and yield DEFER, so that the host is not
- tried again for a while. */
+ {
+ save_errno = errno;
+ code = '4';
+ message = string_sprintf("send() to %s [%s] failed: %s",
+ host->name, host->address, message ? message : US strerror(save_errno));
+ sx.send_quit = FALSE;
+ goto FAILED;
+ }
FAILED:
- ok = FALSE; /* For when reached by GOTO */
-
- if (setting_up)
{
- if (code == '5')
- {
- set_errno(addrlist, save_errno, message, FAIL, pass_message);
- }
- else
- {
- set_errno(addrlist, save_errno, message, DEFER, pass_message);
- yield = DEFER;
- }
- }
+ BOOL message_error;
+
+ sx.ok = FALSE; /* For when reached by GOTO */
+ set_message = message;
/* We want to handle timeouts after MAIL or "." and loss of connection after
"." specially. They can indicate a problem with the sender address or with
cases are treated in the same way as a 4xx response. This next bit of code
does the classification. */
- else
- {
- BOOL message_error;
-
switch(save_errno)
{
case 0:
case ERRNO_MAIL4XX:
case ERRNO_DATA4XX:
- message_error = TRUE;
- break;
+ message_error = TRUE;
+ break;
case ETIMEDOUT:
- message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 ||
- Ustrncmp(smtp_command,"end ",4) == 0;
- break;
+ message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 ||
+ Ustrncmp(smtp_command,"end ",4) == 0;
+ break;
case ERRNO_SMTPCLOSED:
- message_error = Ustrncmp(smtp_command,"end ",4) == 0;
- break;
+ message_error = Ustrncmp(smtp_command,"end ",4) == 0;
+ break;
default:
- message_error = FALSE;
- break;
+ message_error = FALSE;
+ break;
}
/* Handle the cases that are treated as message errors. These are:
(a) negative response or timeout after MAIL
(b) negative response after DATA
(c) negative response or timeout or dropped connection after "."
+ (d) utf8 support required and not offered
It won't be a negative response or timeout after RCPT, as that is dealt
with separately above. The action in all cases is to set an appropriate
if (message_error)
{
if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */
- set_errno(addrlist, save_errno, message, (code == '5')? FAIL : DEFER,
- pass_message);
/* If there's an errno, the message contains just the identity of
the host. */
- if (code != '5') /* Anything other than 5 is treated as temporary */
+ if (code == '5')
+ set_rc = FAIL;
+ else /* Anything other than 5 is treated as temporary */
{
+ set_rc = DEFER;
if (save_errno > 0)
message = US string_sprintf("%s: %s", message, strerror(save_errno));
- if (host->next != NULL) log_write(0, LOG_MAIN, "%s", message);
- deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
+
+ write_logs(host, message, sx.first_addr ? sx.first_addr->basic_errno : 0);
+
*message_defer = TRUE;
}
}
else
{
+ set_rc = DEFER;
yield = (save_errno == ERRNO_CHHEADER_FAIL ||
save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER;
- set_errno(addrlist, save_errno, message, DEFER, pass_message);
}
}
+
+ set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host
+#ifdef EXPERIMENTAL_DSN_INFO
+ , sx.smtp_greeting, sx.helo_response
+#endif
+ );
}
DEBUG(D_transport)
debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d "
- "yield=%d first_address is %sNULL\n", ok, send_quit, send_rset,
- continue_more, yield, (first_addr == NULL)? "":"not ");
+ "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit,
+ sx.send_rset, continue_more, yield, sx.first_addr ? "not " : "");
-if (completed_address && ok && send_quit)
+if (sx.completed_addr && sx.ok && sx.send_quit)
{
BOOL more;
- if (first_addr != NULL || continue_more ||
- (
- (tls_active < 0 ||
- verify_check_this_host(&(ob->hosts_nopass_tls), NULL, host->name,
- host->address, NULL) != OK)
+ smtp_compare_t t_compare;
+
+ t_compare.tblock = tblock;
+ t_compare.current_sender_address = sender_address;
+
+ if ( sx.first_addr != NULL
+ || continue_more
+ || (
+#ifdef SUPPORT_TLS
+ ( tls_out.active.sock < 0 && !continue_proxy_cipher
+ || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK
+ )
&&
+#endif
transport_check_waiting(tblock->name, host->name,
- tblock->connection_max_messages, new_message_id, &more)
- ))
+ tblock->connection_max_messages, new_message_id, &more,
+ (oicf)smtp_are_same_identities, (void*)&t_compare)
+ ) )
{
uschar *msg;
BOOL pass_message;
- if (send_rset)
- {
- if (! (ok = smtp_write_command(&outblock, FALSE, "RSET\r\n") >= 0))
+ if (sx.send_rset)
+ if (! (sx.ok = smtp_write_command(&sx.outblock, SCMD_FLUSH, "RSET\r\n") >= 0))
{
msg = US string_sprintf("send() to %s [%s] failed: %s", host->name,
- host->address, strerror(save_errno));
- send_quit = FALSE;
+ host->address, strerror(errno));
+ sx.send_quit = FALSE;
}
- else if (! (ok = smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout)))
+ else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer,
+ sizeof(sx.buffer), '2', sx.ob->command_timeout)))
{
int code;
- send_quit = check_response(host, &errno, 0, buffer, &code, &msg,
+ sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg,
&pass_message);
- if (!send_quit)
+ if (!sx.send_quit)
{
- DEBUG(D_transport) debug_printf("%s\n", msg);
+ DEBUG(D_transport) debug_printf("H=%s [%s] %s\n",
+ host->name, host->address, msg);
}
}
- }
/* Either RSET was not needed, or it succeeded */
- if (ok)
+ if (sx.ok)
{
- if (first_addr != NULL) /* More addresses still to be sent */
+ int pfd[2];
+ int socket_fd = sx.cctx.sock;
+
+
+ if (sx.first_addr != NULL) /* More addresses still to be sent */
{ /* in this run of the transport */
continue_sequence++; /* Causes * in logging */
goto SEND_MESSAGE;
}
- if (continue_more) return yield; /* More addresses for another run */
- /* Pass the socket to a new Exim process. Before doing so, we must shut
- down TLS. Not all MTAs allow for the continuation of the SMTP session
- when TLS is shut down. We test for this by sending a new EHLO. If we
- don't get a good response, we don't attempt to pass the socket on. */
+ /* Unless caller said it already has more messages listed for this host,
+ pass the connection on to a new Exim process (below, the call to
+ transport_pass_socket). If the caller has more ready, just return with
+ the connection still open. */
- #ifdef SUPPORT_TLS
- if (tls_active >= 0)
- {
- tls_close(TRUE);
- ok = smtp_write_command(&outblock,FALSE,"EHLO %s\r\n",helo_data) >= 0 &&
- smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout);
- }
- #endif
+#ifdef SUPPORT_TLS
+ if (tls_out.active.sock >= 0)
+ if ( continue_more
+ || verify_check_given_host(&sx.ob->hosts_noproxy_tls, host) == OK)
+ {
+ /* Before passing the socket on, or returning to caller with it still
+ open, we must shut down TLS. Not all MTAs allow for the continuation
+ of the SMTP session when TLS is shut down. We test for this by sending
+ a new EHLO. If we don't get a good response, we don't attempt to pass
+ the socket on. */
+
+ tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_WAIT);
+ sx.cctx.tls_ctx = NULL;
+ smtp_peer_options = smtp_peer_options_wrap;
+ sx.ok = !sx.smtps
+ && smtp_write_command(&sx.outblock, SCMD_FLUSH,
+ "EHLO %s\r\n", sx.helo_data) >= 0
+ && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer),
+ '2', sx.ob->command_timeout);
+
+ if (sx.ok && continue_more)
+ return yield; /* More addresses for another run */
+ }
+ else
+ {
+ /* Set up a pipe for proxying TLS for the new transport process */
+
+ smtp_peer_options |= OPTION_TLS;
+ if (sx.ok = (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) == 0))
+ socket_fd = pfd[1];
+ else
+ set_errno(sx.first_addr, errno, US"internal allocation problem",
+ DEFER, FALSE, host
+# ifdef EXPERIMENTAL_DSN_INFO
+ , sx.smtp_greeting, sx.helo_response
+# endif
+ );
+ }
+ else
+#endif
+ if (continue_more)
+ return yield; /* More addresses for another run */
- /* If the socket is successfully passed, we musn't send QUIT (or
+ /* If the socket is successfully passed, we mustn't send QUIT (or
indeed anything!) from here. */
- if (ok && transport_pass_socket(tblock->name, host->name, host->address,
- new_message_id, inblock.sock))
- {
- send_quit = FALSE;
- }
+/*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to
+propagate it from the initial
+*/
+ if (sx.ok && transport_pass_socket(tblock->name, host->name,
+ host->address, new_message_id, socket_fd))
+ {
+ sx.send_quit = FALSE;
+
+ /* We have passed the client socket to a fresh transport process.
+ If TLS is still active, we need to proxy it for the transport we
+ just passed the baton to. Fork a child to to do it, and return to
+ get logging done asap. Which way to place the work makes assumptions
+ about post-fork prioritisation which may not hold on all platforms. */
+#ifdef SUPPORT_TLS
+ if (tls_out.active.sock >= 0)
+ {
+ int pid = fork();
+ if (pid == 0) /* child; fork again to disconnect totally */
+ {
+ if (running_in_test_harness) millisleep(100); /* let parent debug out */
+ /* does not return */
+ smtp_proxy_tls(sx.cctx.tls_ctx, sx.buffer, sizeof(sx.buffer), pfd,
+ sx.ob->command_timeout);
+ }
+
+ if (pid > 0) /* parent */
+ {
+ DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid);
+ close(pfd[0]);
+ /* tidy the inter-proc to disconn the proxy proc */
+ waitpid(pid, NULL, 0);
+ tls_close(sx.cctx.tls_ctx, TLS_NO_SHUTDOWN);
+ sx.cctx.tls_ctx = NULL;
+ (void)close(sx.cctx.sock);
+ sx.cctx.sock = -1;
+ continue_transport = NULL;
+ continue_hostname = NULL;
+ return yield;
+ }
+ log_write(0, LOG_PANIC_DIE, "fork failed");
+ }
+#endif
+ }
}
/* If RSET failed and there are addresses left, they get deferred. */
-
- else set_errno(first_addr, errno, msg, DEFER, FALSE);
+ else
+ set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host
+#ifdef EXPERIMENTAL_DSN_INFO
+ , sx.smtp_greeting, sx.helo_response
+#endif
+ );
}
}
operation, the old commented-out code was removed on 17-Sep-99. */
SEND_QUIT:
-if (send_quit) (void)smtp_write_command(&outblock, FALSE, "QUIT\r\n");
+if (sx.send_quit) (void)smtp_write_command(&sx.outblock, SCMD_FLUSH, "QUIT\r\n");
END_OFF:
#ifdef SUPPORT_TLS
-tls_close(TRUE);
+tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
+sx.cctx.tls_ctx = NULL;
#endif
/* Close the socket, and return the appropriate value, first setting
-continue_transport and continue_hostname NULL to prevent any other addresses
-that may include the host from trying to re-use a continuation socket. This
works because the NULL setting is passed back to the calling process, and
remote_max_parallel is forced to 1 when delivering over an existing connection,
specified in the transports, and therefore not visible at top level, in which
case continue_more won't get set. */
-(void)close(inblock.sock);
+HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
+if (sx.send_quit)
+ {
+ shutdown(sx.cctx.sock, SHUT_WR);
+ if (fcntl(sx.cctx.sock, F_SETFL, O_NONBLOCK) == 0)
+ for (rc = 16; read(sx.cctx.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;)
+ rc--; /* drain socket */
+ }
+(void)close(sx.cctx.sock);
+
+#ifndef DISABLE_EVENT
+(void) event_raise(tblock->event_action, US"tcp:close", NULL);
+#endif
+
continue_transport = NULL;
continue_hostname = NULL;
return yield;
smtp_transport_closedown(transport_instance *tblock)
{
smtp_transport_options_block *ob =
- (smtp_transport_options_block *)(tblock->options_block);
+ (smtp_transport_options_block *)tblock->options_block;
+client_conn_ctx cctx;
smtp_inblock inblock;
smtp_outblock outblock;
uschar buffer[256];
uschar inbuffer[4096];
uschar outbuffer[16];
-inblock.sock = fileno(stdin);
+/*XXX really we need an active-smtp-client ctx, rather than assuming stdout */
+cctx.sock = fileno(stdin);
+cctx.tls_ctx = cctx.sock == tls_out.active.sock ? tls_out.active.tls_ctx : NULL;
+
+inblock.cctx = &cctx;
inblock.buffer = inbuffer;
inblock.buffersize = sizeof(inbuffer);
inblock.ptr = inbuffer;
inblock.ptrend = inbuffer;
-outblock.sock = inblock.sock;
+outblock.cctx = &cctx;
outblock.buffersize = sizeof(outbuffer);
outblock.buffer = outbuffer;
outblock.ptr = outbuffer;
outblock.cmd_count = 0;
outblock.authenticating = FALSE;
-(void)smtp_write_command(&outblock, FALSE, "QUIT\r\n");
+(void)smtp_write_command(&outblock, SCMD_FLUSH, "QUIT\r\n");
(void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
ob->command_timeout);
-(void)close(inblock.sock);
+(void)close(cctx.sock);
}
{
address_item *first_addr = NULL;
address_item *addr;
-for (addr = addrlist; addr != NULL; addr = addr->next)
- {
- if (addr->transport_return != DEFER) continue;
- if (first_addr == NULL) first_addr = addr;
- addr->transport_return = PENDING_DEFER;
- addr->basic_errno = 0;
- addr->more_errno = (host->mx >= 0)? 'M' : 'A';
- addr->message = NULL;
- #ifdef SUPPORT_TLS
- addr->cipher = NULL;
- addr->peerdn = NULL;
- #endif
- }
+for (addr = addrlist; addr; addr = addr->next)
+ if (addr->transport_return == DEFER)
+ {
+ if (!first_addr) first_addr = addr;
+ addr->transport_return = PENDING_DEFER;
+ addr->basic_errno = 0;
+ addr->more_errno = (host->mx >= 0)? 'M' : 'A';
+ addr->message = NULL;
+#ifdef SUPPORT_TLS
+ addr->cipher = NULL;
+ addr->ourcert = NULL;
+ addr->peercert = NULL;
+ addr->peerdn = NULL;
+ addr->ocsp = OCSP_NOT_REQ;
+#endif
+#ifdef EXPERIMENTAL_DSN_INFO
+ addr->smtp_greeting = NULL;
+ addr->helo_response = NULL;
+#endif
+ }
return first_addr;
}
address_item *addrlist) /* addresses we are working on */
{
int cutoff_retry;
-int port;
+int defport;
int hosts_defer = 0;
int hosts_fail = 0;
int hosts_looked_up = 0;
int total_hosts_tried = 0;
address_item *addr;
BOOL expired = TRUE;
-BOOL continuing = continue_hostname != NULL;
uschar *expanded_hosts = NULL;
uschar *pistring;
uschar *tid = string_sprintf("%s transport", tblock->name);
smtp_transport_options_block *ob =
(smtp_transport_options_block *)(tblock->options_block);
host_item *hostlist = addrlist->host_list;
-host_item *host = NULL;
+host_item *host;
DEBUG(D_transport)
{
debug_printf("%s transport entered\n", tblock->name);
- for (addr = addrlist; addr != NULL; addr = addr->next)
+ for (addr = addrlist; addr; addr = addr->next)
debug_printf(" %s\n", addr->address);
- if (continuing) debug_printf("already connected to %s [%s]\n",
- continue_hostname, continue_host_address);
+ if (hostlist)
+ {
+ debug_printf("hostlist:\n");
+ for (host = hostlist; host; host = host->next)
+ debug_printf(" '%s' IP %s port %d\n", host->name, host->address, host->port);
+ }
+ if (continue_hostname)
+ debug_printf("already connected to %s [%s] (on fd %d)\n",
+ continue_hostname, continue_host_address,
+ cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0);
}
/* Set the flag requesting that these hosts be added to the waiting
a host list with hosts_override set, use the host list supplied with the
transport. It is an error for this not to exist. */
-if (hostlist == NULL || (ob->hosts_override && ob->hosts != NULL))
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+if (tls_requiretls & REQUIRETLS_MSG)
+ ob->tls_tempfail_tryclear = FALSE; /*XXX surely we should have a local for this
+ rather than modifying the transport? */
+#endif
+
+if (!hostlist || (ob->hosts_override && ob->hosts))
{
- if (ob->hosts == NULL)
+ if (!ob->hosts)
{
addrlist->message = string_sprintf("%s transport called with no hosts set",
tblock->name);
as the hosts string will never be used again, it doesn't matter that we
replace all the : characters with zeros. */
- if (ob->hostlist == NULL)
+ if (!ob->hostlist)
{
uschar *s = ob->hosts;
if (Ustrchr(s, '$') != NULL)
{
- expanded_hosts = expand_string(s);
- if (expanded_hosts == NULL)
+ if (!(expanded_hosts = expand_string(s)))
{
addrlist->message = string_sprintf("failed to expand list of hosts "
"\"%s\" in %s transport: %s", s, tblock->name, expand_string_message);
- addrlist->transport_return = search_find_defer? DEFER : PANIC;
+ addrlist->transport_return = search_find_defer ? DEFER : PANIC;
return FALSE; /* Only top address has status */
}
DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to "
host_build_hostlist(&hostlist, s, ob->hosts_randomize);
+ /* Check that the expansion yielded something useful. */
+ if (!hostlist)
+ {
+ addrlist->message =
+ string_sprintf("%s transport has empty hosts setting", tblock->name);
+ addrlist->transport_return = PANIC;
+ return FALSE; /* Only top address has status */
+ }
+
/* If there was no expansion of hosts, save the host list for
next time. */
- if (expanded_hosts == NULL) ob->hostlist = hostlist;
+ if (!expanded_hosts) ob->hostlist = hostlist;
}
/* This is not the first time this transport has been run in this delivery;
the host list was built previously. */
- else hostlist = ob->hostlist;
+ else
+ hostlist = ob->hostlist;
}
/* The host list was supplied with the address. If hosts_randomize is set, we
already been randomized (but don't bother if continuing down an existing
connection). */
-else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continuing)
+else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname)
{
host_item *newlist = NULL;
- while (hostlist != NULL)
+ while (hostlist)
{
host_item *h = hostlist;
hostlist = hostlist->next;
h->sort_key = random_number(100);
- if (newlist == NULL)
+ if (!newlist)
{
h->next = NULL;
newlist = h;
else
{
host_item *hh = newlist;
- while (hh->next != NULL)
+ while (hh->next)
{
if (h->sort_key < hh->next->sort_key) break;
hh = hh->next;
hostlist = addrlist->host_list = newlist;
}
-
/* Sort out the default port. */
-if (!smtp_get_port(ob->port, addrlist, &port, tid)) return FALSE;
-
+if (!smtp_get_port(ob->port, addrlist, &defport, tid)) return FALSE;
/* For each host-plus-IP-address on the list:
time. After that, set the status and error data for any addresses that haven't
had it set already. */
-for (cutoff_retry = 0; expired &&
- cutoff_retry < ((ob->delay_after_cutoff)? 1 : 2);
+for (cutoff_retry = 0;
+ expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2);
cutoff_retry++)
{
host_item *nexthost = NULL;
int unexpired_hosts_tried = 0;
+ BOOL continue_host_tried = FALSE;
+retry_non_continued:
for (host = hostlist;
- host != NULL &&
- unexpired_hosts_tried < ob->hosts_max_try &&
- total_hosts_tried < ob->hosts_max_try_hardlimit;
+ host
+ && unexpired_hosts_tried < ob->hosts_max_try
+ && total_hosts_tried < ob->hosts_max_try_hardlimit;
host = nexthost)
{
int rc;
int host_af;
uschar *rs;
- BOOL serialized = FALSE;
BOOL host_is_expired = FALSE;
BOOL message_defer = FALSE;
- BOOL ifchanges = FALSE;
BOOL some_deferred = FALSE;
address_item *first_addr = NULL;
uschar *interface = NULL;
Note that we mustn't skip unusable hosts if the address is not unset; they
may be needed as expired hosts on the 2nd time round the cutoff loop. */
- if (host->address == NULL)
+ if (!host->address)
{
int new_port, flags;
host_item *hh;
- uschar *canonical_name;
if (host->status >= hstatus_unusable)
{
/* Find by name if so configured, or if it's an IP address. We don't
just copy the IP address, because we need the test-for-local to happen. */
- flags = HOST_FIND_BY_A;
+ flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA;
if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE;
if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS;
if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0)
- rc = host_find_byname(host, NULL, flags, &canonical_name, TRUE);
+ rc = host_find_byname(host, NULL, flags, NULL, TRUE);
else
rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL,
- &canonical_name, NULL);
+ &ob->dnssec, /* domains for request/require */
+ NULL, NULL);
/* Update the host (and any additional blocks, resulting from
multihoming) with a host-specific port, if any. */
commonly points to a configuration error, but the best action is still
to carry on for the next host. */
- if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_FAILED)
+ if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_SECURITY || rc == HOST_FIND_FAILED)
{
retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0);
expired = FALSE;
"HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name);
host->status = hstatus_unusable;
- for (addr = addrlist; addr != NULL; addr = addr->next)
+ for (addr = addrlist; addr; addr = addr->next)
{
if (addr->transport_return != DEFER) continue;
addr->basic_errno = ERRNO_UNKNOWNHOST;
- addr->message =
- string_sprintf("failed to lookup IP address for %s", host->name);
+ addr->message = string_sprintf(
+ rc == HOST_FIND_SECURITY
+ ? "lookup of IP address for %s was insecure"
+ : "failed to lookup IP address for %s",
+ host->name);
}
continue;
}
if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost)
{
- for (addr = addrlist; addr != NULL; addr = addr->next)
+ for (addr = addrlist; addr; addr = addr->next)
{
addr->basic_errno = 0;
addr->message = string_sprintf("%s transport found host %s to be "
result of the lookup. Set expired FALSE, to save the outer loop executing
twice. */
- if (continuing && (Ustrcmp(continue_hostname, host->name) != 0 ||
- Ustrcmp(continue_host_address, host->address) != 0))
- {
- expired = FALSE;
- continue; /* With next host */
- }
+ if (continue_hostname)
+ if ( Ustrcmp(continue_hostname, host->name) != 0
+ || Ustrcmp(continue_host_address, host->address) != 0
+ )
+ {
+ expired = FALSE;
+ continue; /* With next host */
+ }
+ else
+ continue_host_tried = TRUE;
/* Reset the default next host in case a multihomed host whose addresses
are not looked up till just above added to the host list. */
doing a two-stage queue run, don't do this if forcing. */
if ((!deliver_force || queue_2stage) && (queue_smtp ||
- match_isinlist(addrlist->domain, &queue_smtp_domains, 0,
+ match_isinlist(addrlist->domain,
+ (const uschar **)&queue_smtp_domains, 0,
&domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK))
{
expired = FALSE;
- for (addr = addrlist; addr != NULL; addr = addr->next)
- {
- if (addr->transport_return != DEFER) continue;
- addr->message = US"domain matches queue_smtp_domains, or -odqs set";
- }
+ for (addr = addrlist; addr; addr = addr->next)
+ if (addr->transport_return == DEFER)
+ addr->message = US"domain matches queue_smtp_domains, or -odqs set";
continue; /* With next host */
}
deliver_host = host->name;
deliver_host_address = host->address;
+ lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes"
+ : host->dnssec == DS_NO ? US"no"
+ : US"";
/* Set up a string for adding to the retry key if the port number is not
the standard SMTP port. A host may have its own port setting that overrides
the default. */
- pistring = string_sprintf(":%d", (host->port == PORT_NONE)?
- port : host->port);
+ pistring = string_sprintf(":%d", host->port == PORT_NONE
+ ? defport : host->port);
if (Ustrcmp(pistring, ":25") == 0) pistring = US"";
/* Select IPv4 or IPv6, and choose an outgoing interface. If the interface
- string changes upon expansion, we must add it to the key that is used for
- retries, because connections to the same host from a different interface
- should be treated separately. */
+ string is set, even if constant (as different transports can have different
+ constant settings), we must add it to the key that is used for retries,
+ because connections to the same host from a different interface should be
+ treated separately. */
- host_af = (Ustrchr(host->address, ':') == NULL)? AF_INET : AF_INET6;
- if (!smtp_get_interface(ob->interface, host_af, addrlist, &ifchanges,
- &interface, tid))
- return FALSE;
- if (ifchanges) pistring = string_sprintf("%s/%s", pistring, interface);
+ host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6;
+ if ((rs = ob->interface) && *rs)
+ {
+ if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid))
+ return FALSE;
+ pistring = string_sprintf("%s/%s", pistring, interface);
+ }
/* The first time round the outer loop, check the status of the host by
inspecting the retry data. The second time round, we are interested only
if (cutoff_retry == 0)
{
+ BOOL incl_ip;
/* Ensure the status of the address is set by checking retry data if
- necessary. There maybe host-specific retry data (applicable to all
+ necessary. There may be host-specific retry data (applicable to all
messages) and also data for retries of a specific message at this host.
If either of these retry records are actually read, the keys used are
returned to save recomputing them later. */
+ if (exp_bool(addrlist, US"transport", tblock->name, D_transport,
+ US"retry_include_ip_address", ob->retry_include_ip_address,
+ ob->expand_retry_include_ip_address, &incl_ip) != OK)
+ continue; /* with next host */
+
host_is_expired = retry_check_address(addrlist->domain, host, pistring,
- ob->retry_include_ip_address, &retry_host_key, &retry_message_key);
+ incl_ip, &retry_host_key, &retry_message_key);
- DEBUG(D_transport) debug_printf("%s [%s]%s status = %s\n", host->name,
+ DEBUG(D_transport) debug_printf("%s [%s]%s retry-status = %s\n", host->name,
(host->address == NULL)? US"" : host->address, pistring,
(host->status == hstatus_usable)? "usable" :
(host->status == hstatus_unusable)? "unusable" :
switch (host->status)
{
case hstatus_unusable:
- expired = FALSE;
- setflag(addrlist, af_retry_skipped);
- /* Fall through */
+ expired = FALSE;
+ setflag(addrlist, af_retry_skipped);
+ /* Fall through */
case hstatus_unusable_expired:
- switch (host->why)
- {
- case hwhy_retry: hosts_retry++; break;
- case hwhy_failed: hosts_fail++; break;
- case hwhy_deferred: hosts_defer++; break;
- }
-
- /* If there was a retry message key, implying that previously there
- was a message-specific defer, we don't want to update the list of
- messages waiting for these hosts. */
-
- if (retry_message_key != NULL) update_waiting = FALSE;
- continue; /* With the next host or IP address */
+ switch (host->why)
+ {
+ case hwhy_retry: hosts_retry++; break;
+ case hwhy_failed: hosts_fail++; break;
+ case hwhy_insecure:
+ case hwhy_deferred: hosts_defer++; break;
+ }
+
+ /* If there was a retry message key, implying that previously there
+ was a message-specific defer, we don't want to update the list of
+ messages waiting for these hosts. */
+
+ if (retry_message_key) update_waiting = FALSE;
+ continue; /* With the next host or IP address */
}
}
else
{
- if (host->address == NULL ||
- host->status != hstatus_unusable_expired ||
- host->last_try > received_time)
+ if ( !host->address
+ || host->status != hstatus_unusable_expired
+ || host->last_try > received_time.tv_sec)
continue;
- DEBUG(D_transport)
- debug_printf("trying expired host %s [%s]%s\n",
+ DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n",
host->name, host->address, pistring);
host_is_expired = TRUE;
}
and remember this for later deletion. Do not do any of this if we are
sending the message down a pre-existing connection. */
- if (!continuing &&
- verify_check_this_host(&(ob->serialize_hosts), NULL, host->name,
- host->address, NULL) == OK)
+ if ( !continue_hostname
+ && verify_check_given_host(&ob->serialize_hosts, host) == OK)
{
serialize_key = string_sprintf("host-serialize-%s", host->name);
- if (!enq_start(serialize_key))
+ if (!enq_start(serialize_key, 1))
{
DEBUG(D_transport)
debug_printf("skipping host %s because another Exim process "
hosts_serial++;
continue;
}
- serialized = TRUE;
}
/* OK, we have an IP address that is not waiting for its retry time to
DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n",
message_id, host->name, host->address, addrlist->address,
- (addrlist->next == NULL)? "" : ", ...");
+ addrlist->next ? ", ..." : "");
set_process_info("delivering %s to %s [%s] (%s%s)",
message_id, host->name, host->address, addrlist->address,
- (addrlist->next == NULL)? "" : ", ...");
+ addrlist->next ? ", ..." : "");
/* This is not for real; don't do the delivery. If there are
any remaining hosts, list them. */
if (dont_deliver)
{
host_item *host2;
- set_errno(addrlist, 0, NULL, OK, FALSE);
- for (addr = addrlist; addr != NULL; addr = addr->next)
+ set_errno_nohost(addrlist, 0, NULL, OK, FALSE);
+ for (addr = addrlist; addr; addr = addr->next)
{
addr->host_used = host;
addr->special_action = '*';
{
debug_printf("*** delivery by %s transport bypassed by -N option\n"
"*** host and remaining hosts:\n", tblock->name);
- for (host2 = host; host2 != NULL; host2 = host2->next)
+ for (host2 = host; host2; host2 = host2->next)
debug_printf(" %s [%s]\n", host2->name,
- (host2->address == NULL)? US"unset" : host2->address);
+ host2->address ? host2->address : US"unset");
}
rc = OK;
}
else
{
+ host_item * thost;
+ /* Make a copy of the host if it is local to this invocation
+ of the transport. */
+
+ if (expanded_hosts)
+ {
+ thost = store_get(sizeof(host_item));
+ *thost = *host;
+ thost->name = string_copy(host->name);
+ thost->address = string_copy(host->address);
+ }
+ else
+ thost = host;
+
if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try)
{
host_item *h;
DEBUG(D_transport)
debug_printf("hosts_max_try limit reached with this host\n");
- for (h = host; h != NULL; h = h->next)
- if (h->mx != host->mx) break;
- if (h != NULL)
- {
- nexthost = h;
- unexpired_hosts_tried--;
- DEBUG(D_transport) debug_printf("however, a higher MX host exists "
- "and will be tried\n");
- }
+ for (h = host; h; h = h->next) if (h->mx != host->mx)
+ {
+ nexthost = h;
+ unexpired_hosts_tried--;
+ DEBUG(D_transport) debug_printf("however, a higher MX host exists "
+ "and will be tried\n");
+ break;
+ }
}
/* Attempt the delivery. */
total_hosts_tried++;
- rc = smtp_deliver(addrlist, host, host_af, port, interface, tblock,
- expanded_hosts != NULL, &message_defer, FALSE);
+ rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock,
+ &message_defer, FALSE);
/* Yield is one of:
OK => connection made, each address contains its result;
failures, where the log has already been written. If all hosts defer a
general message is written at the end. */
- if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL &&
- first_addr->basic_errno != ERRNO_TLSFAILURE)
- write_logs(first_addr, host);
+ if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL
+ && first_addr->basic_errno != ERRNO_TLSFAILURE)
+ write_logs(host, first_addr->message, first_addr->basic_errno);
+
+#ifndef DISABLE_EVENT
+ if (rc == DEFER)
+ deferred_event_raise(first_addr, host);
+#endif
/* If STARTTLS was accepted, but there was a failure in setting up the
TLS session (usually a certificate screwup), and the host is not in
session, so the in-clear transmission after those errors, if permitted,
happens inside smtp_deliver().] */
- #ifdef SUPPORT_TLS
- if (rc == DEFER && first_addr->basic_errno == ERRNO_TLSFAILURE &&
- ob->tls_tempfail_tryclear &&
- verify_check_this_host(&(ob->hosts_require_tls), NULL, host->name,
- host->address, NULL) != OK)
+#ifdef SUPPORT_TLS
+ if ( rc == DEFER
+ && first_addr->basic_errno == ERRNO_TLSFAILURE
+ && ob->tls_tempfail_tryclear
+ && verify_check_given_host(&ob->hosts_require_tls, host) != OK
+ )
{
- log_write(0, LOG_MAIN, "TLS session failure: delivering unencrypted "
- "to %s [%s] (not in hosts_require_tls)", host->name, host->address);
+ log_write(0, LOG_MAIN,
+ "%s: delivering unencrypted to H=%s [%s] (not in hosts_require_tls)",
+ first_addr->message, host->name, host->address);
first_addr = prepare_addresses(addrlist, host);
- rc = smtp_deliver(addrlist, host, host_af, port, interface, tblock,
- expanded_hosts != NULL, &message_defer, TRUE);
+ rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock,
+ &message_defer, TRUE);
if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL)
- write_logs(first_addr, host);
+ write_logs(host, first_addr->message, first_addr->basic_errno);
+# ifndef DISABLE_EVENT
+ if (rc == DEFER)
+ deferred_event_raise(first_addr, host);
+# endif
}
- #endif
+#endif /*SUPPORT_TLS*/
}
/* Delivery attempt finished */
- rs = (rc == OK)? US"OK" : (rc == DEFER)? US"DEFER" : (rc == ERROR)?
- US"ERROR" : US"?";
+ rs = rc == OK ? US"OK"
+ : rc == DEFER ? US"DEFER"
+ : rc == ERROR ? US"ERROR"
+ : US"?";
set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s",
message_id, host->name, host->address, addrlist->address,
- (addrlist->next == NULL)? "" : " (& others)", rs);
+ addrlist->next ? " (& others)" : "", rs);
/* Release serialization if set up */
- if (serialized) enq_end(serialize_key);
+ if (serialize_key) enq_end(serialize_key);
/* If the result is DEFER, or if a host retry record is known to exist, we
need to add an item to the retry chain for updating the retry database
the unusable tree at the outer level, so even if different address blocks
contain the same address, it still won't get tried again.) */
- if (rc == DEFER || retry_host_key != NULL)
+ if (rc == DEFER || retry_host_key)
{
- int delete_flag = (rc != DEFER)? rf_delete : 0;
- if (retry_host_key == NULL)
+ int delete_flag = rc != DEFER ? rf_delete : 0;
+ if (!retry_host_key)
{
- retry_host_key = ob->retry_include_ip_address?
- string_sprintf("T:%S:%s%s", host->name, host->address, pistring) :
- string_sprintf("T:%S%s", host->name, pistring);
+ BOOL incl_ip;
+ if (exp_bool(addrlist, US"transport", tblock->name, D_transport,
+ US"retry_include_ip_address", ob->retry_include_ip_address,
+ ob->expand_retry_include_ip_address, &incl_ip) != OK)
+ incl_ip = TRUE; /* error; use most-specific retry record */
+
+ retry_host_key = incl_ip
+ ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring)
+ : string_sprintf("T:%S%s", host->name, pistring);
}
/* If a delivery of another message over an existing SMTP connection
host is genuinely down, another non-continued message delivery will
notice it soon enough. */
- if (delete_flag != 0 || !continuing)
+ if (delete_flag != 0 || !continue_hostname)
retry_add_item(first_addr, retry_host_key, rf_host | delete_flag);
/* We may have tried an expired host, if its retry time has come; ensure
if (rc == DEFER)
{
- host->status = (host_is_expired)?
- hstatus_unusable_expired : hstatus_unusable;
+ host->status = host_is_expired
+ ? hstatus_unusable_expired : hstatus_unusable;
host->why = hwhy_deferred;
}
}
reasonable. Also, stop the message from being remembered as waiting
for specific hosts. */
- if (message_defer || retry_message_key != NULL)
+ if (message_defer || retry_message_key)
{
- int delete_flag = message_defer? 0 : rf_delete;
- if (retry_message_key == NULL)
+ int delete_flag = message_defer ? 0 : rf_delete;
+ if (!retry_message_key)
{
- retry_message_key = ob->retry_include_ip_address?
- string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring,
- message_id) :
- string_sprintf("T:%S%s:%s", host->name, pistring, message_id);
+ BOOL incl_ip;
+ if (exp_bool(addrlist, US"transport", tblock->name, D_transport,
+ US"retry_include_ip_address", ob->retry_include_ip_address,
+ ob->expand_retry_include_ip_address, &incl_ip) != OK)
+ incl_ip = TRUE; /* error; use most-specific retry record */
+
+ retry_message_key = incl_ip
+ ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring,
+ message_id)
+ : string_sprintf("T:%S%s:%s", host->name, pistring, message_id);
}
retry_add_item(addrlist, retry_message_key,
rf_message | rf_host | delete_flag);
case, see if any of them are deferred. */
if (rc == OK)
- {
- for (addr = addrlist; addr != NULL; addr = addr->next)
- {
+ for (addr = addrlist; addr; addr = addr->next)
if (addr->transport_return == DEFER)
{
some_deferred = TRUE;
break;
}
- }
- }
/* If no addresses deferred or the result was ERROR, return. We do this for
ERROR because a failing filter set-up or add_headers expansion is likely to
case when we were trying to deliver down an existing channel and failed.
Don't try any other hosts in this case. */
- if (continuing) break;
+ if (continue_hostname) break;
/* If the whole delivery, or some individual addresses, were deferred and
there are more hosts that could be tried, do not count this host towards
important because if we don't try all hosts, the address will never time
out. NOTE: this does not apply to hosts_max_try_hardlimit. */
- if ((rc == DEFER || some_deferred) && nexthost != NULL)
+ if ((rc == DEFER || some_deferred) && nexthost)
{
BOOL timedout;
retry_config *retry = retry_find_config(host->name, NULL, 0, 0);
- if (retry != NULL && retry->rules != NULL)
+ if (retry && retry->rules)
{
retry_rule *last_rule;
for (last_rule = retry->rules;
- last_rule->next != NULL;
+ last_rule->next;
last_rule = last_rule->next);
- timedout = time(NULL) - received_time > last_rule->timeout;
+ timedout = time(NULL) - received_time.tv_sec > last_rule->timeout;
}
else timedout = TRUE; /* No rule => timed out */
}
} /* End of loop for trying multiple hosts. */
+ /* If we failed to find a matching host in the list, for an already-open
+ connection, just close it and start over with the list. This can happen
+ for routing that changes from run to run, or big multi-IP sites with
+ round-robin DNS. */
+
+ if (continue_hostname && !continue_host_tried)
+ {
+ int fd = cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0;
+
+ DEBUG(D_transport) debug_printf("no hosts match already-open connection\n");
+#ifdef SUPPORT_TLS
+ /* A TLS conn could be open for a cutthrough, but not for a plain continued-
+ transport */
+/*XXX doublecheck that! */
+
+ if (cutthrough.cctx.sock >= 0 && cutthrough.is_tls)
+ {
+ (void) tls_write(cutthrough.cctx.tls_ctx, US"QUIT\r\n", 6, FALSE);
+ tls_close(cutthrough.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
+ cutthrough.cctx.tls_ctx = NULL;
+ cutthrough.is_tls = FALSE;
+ }
+ else
+#else
+ (void) write(fd, US"QUIT\r\n", 6);
+#endif
+ (void) close(fd);
+ cutthrough.cctx.sock = -1;
+ continue_hostname = NULL;
+ goto retry_non_continued;
+ }
+
/* This is the end of the loop that repeats iff expired is TRUE and
ob->delay_after_cutoff is FALSE. The second time round we will
try those hosts that haven't been tried since the message arrived. */
if (mua_wrapper)
{
- for (addr = addrlist; addr != NULL; addr = addr->next)
+ for (addr = addrlist; addr; addr = addr->next)
addr->transport_return = FAIL;
goto END_TRANSPORT;
}
down an existing TCP/IP connection, and something caused the host not to be
found, we end up here, but can detect these cases and handle them specially. */
-for (addr = addrlist; addr != NULL; addr = addr->next)
+for (addr = addrlist; addr; addr = addr->next)
{
/* If host is not NULL, it means that we stopped processing the host list
because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this
However, if we have hit hosts_max_try_hardlimit, we want to behave as if all
hosts were tried. */
- if (host != NULL)
- {
+ if (host)
if (total_hosts_tried >= ob->hosts_max_try_hardlimit)
{
DEBUG(D_transport)
debug_printf("hosts_max_try limit caused some hosts to be skipped\n");
setflag(addr, af_retry_skipped);
}
- }
if (queue_smtp) /* no deliveries attempted */
{
addr->message = US"SMTP delivery explicitly queued";
}
- else if (addr->transport_return == DEFER &&
- (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) &&
- addr->message == NULL)
+ else if ( addr->transport_return == DEFER
+ && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0)
+ && !addr->message
+ )
{
addr->basic_errno = ERRNO_HRETRY;
- if (continue_hostname != NULL)
- {
+ if (continue_hostname)
addr->message = US"no host found for existing SMTP connection";
- }
else if (expired)
{
setflag(addr, af_pass_message); /* This is not a security risk */
- addr->message = (ob->delay_after_cutoff)?
- US"retry time not reached for any host after a long failure period" :
- US"all hosts have been failing for a long time and were last tried "
- "after this message arrived";
+ addr->message = string_sprintf(
+ "all hosts%s have been failing for a long time %s",
+ addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"",
+ ob->delay_after_cutoff
+ ? US"(and retry time not reached)"
+ : US"and were last tried after this message arrived");
/* If we are already using fallback hosts, or there are no fallback hosts
defined, convert the result to FAIL to cause a bounce. */
- if (addr->host_list == addr->fallback_hosts ||
- addr->fallback_hosts == NULL)
+ if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts)
addr->transport_return = FAIL;
}
else
{
+ const char * s;
if (hosts_retry == hosts_total)
- addr->message = US"retry time not reached for any host";
+ s = "retry time not reached for any host%s";
else if (hosts_fail == hosts_total)
- addr->message = US"all host address lookups failed permanently";
+ s = "all host address lookups%s failed permanently";
else if (hosts_defer == hosts_total)
- addr->message = US"all host address lookups failed temporarily";
+ s = "all host address lookups%s failed temporarily";
else if (hosts_serial == hosts_total)
- addr->message = US"connection limit reached for all hosts";
+ s = "connection limit reached for all hosts%s";
else if (hosts_fail+hosts_defer == hosts_total)
- addr->message = US"all host address lookups failed";
- else addr->message = US"some host address lookups failed and retry time "
- "not reached for other hosts or connection limit reached";
+ s = "all host address lookups%s failed";
+ else
+ s = "some host address lookups failed and retry time "
+ "not reached for other hosts or connection limit reached%s";
+
+ addr->message = string_sprintf(s,
+ addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"");
}
}
}
/* Update the database which keeps information about which messages are waiting
for which hosts to become available. For some message-specific errors, the
update_waiting flag is turned off because we don't want follow-on deliveries in
-those cases. */
+those cases. If this transport instance is explicitly limited to one message
+per connection then follow-on deliveries are not possible and there's no need
+to create/update the per-transport wait-<transport_name> database. */
-if (update_waiting) transport_update_waiting(hostlist, tblock->name);
+if (update_waiting && tblock->connection_max_messages != 1)
+ transport_update_waiting(hostlist, tblock->name);
END_TRANSPORT:
return TRUE; /* Each address has its status */
}
+#endif /*!MACRO_PREDEF*/
+/* vi: aw ai sw=2
+*/
/* End of transport/smtp.c */
git://git.exim.org / exim.git / blobdiff