* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2016 */
+/* Copyright (c) University of Cambridge 1995 - 2017 */
/* 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)
-
-#define DELIVER_BUFFER_SIZE 4096
-
/* Options specific to the smtp transport. This transport also supports LMTP
over TCP/IP. The options must be in alphabetic order (note that "_" comes
#ifdef SUPPORT_TLS
{ "hosts_nopass_tls", opt_stringptr,
(void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) },
+ { "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_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) },
NULL, /* hosts_try_dane */
NULL, /* hosts_require_dane */
#endif
+ NULL, /* hosts_try_fastopen */
#ifndef DISABLE_PRDR
US"*", /* hosts_try_prdr */
#endif
NULL, /* hosts_avoid_pipelining */
NULL, /* hosts_avoid_esmtp */
NULL, /* hosts_nopass_tls */
+ US"*", /* hosts_noproxy_tls */
5*60, /* command_timeout */
5*60, /* connect_timeout; shorter system default overrides */
5*60, /* data timeout */
/* 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 BOOL pipelining_active; /* current transaction is in pipe mode */
+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;
}
{
addr->basic_errno = errno_value;
addr->more_errno |= orvalue;
- if (msg != NULL)
+ if (msg)
{
addr->message = msg;
if (pass_message) setflag(addr, af_pass_message);
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
uschar *buffer, int *yield, uschar **message, BOOL *pass_message)
{
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 after %s%s",
- 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)
- {
- const uschar *malfresp = string_printing(buffer);
- while (isspace(*malfresp)) malfresp++;
- *message = *malfresp == 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, 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
-/* Handle lack of advertised SMTPUTF8, for international message */
-if (*errno_value == ERRNO_UTF8_FWD)
- {
- *message = US string_sprintf("utf8 support required but not offered for forwarding");
- DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message);
- return TRUE;
- }
+ 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)
{
- const uschar *s = string_printing(buffer);
- *message = US string_sprintf("SMTP error from remote mail server after %s%s: "
- "%s", pl, smtp_command, 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;
{
*errno_value = ERRNO_SMTPCLOSED;
*message = US string_sprintf("Remote host closed connection "
- "in response to %s%s", pl, smtp_command);
+ "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;
}
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)
{
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;
}
while (count-- > 0) /* Mark any pending addrs with the host used */
{
while (addr->transport_return != PENDING_DEFER) addr = addr->next;
- addr->host_used = host;
+ addr->host_used = sx->host;
addr = addr->next;
}
return -3;
while (addr->transport_return != PENDING_DEFER) addr = addr->next;
/* The address was accepted */
- addr->host_used = host;
+ addr->host_used = sx->host;
- if (smtp_read_response(inblock, buffer, buffsize, '2', timeout))
+ 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)
{
uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>",
- transport_rcpt_address(addr, include_affixes));
- set_errno_nohost(addrlist, ETIMEDOUT, message, DEFER, FALSE);
+ 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>: "
- "%s", transport_rcpt_address(addr, include_affixes),
- string_printing(buffer));
+ "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes),
+ string_printing(sx->buffer));
setflag(addr, af_pass_message);
- msglog_line(host, 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;
+ if (!sx->verify)
+ {
#ifndef DISABLE_EVENT
- event_defer_errno = addr->more_errno;
- msg_event_raise(US"msg:rcpt:host:defer", addr);
+ event_defer_errno = addr->more_errno;
+ msg_event_raise(US"msg:rcpt:host:defer", addr);
#endif
- /* Log temporary errors if there are more hosts to be tried.
- If not, log this last one in the == line. */
+ /* Log temporary errors if there are more hosts to be tried.
+ If not, log this last one in the == line. */
- if (host->next)
- log_write(0, LOG_MAIN, "H=%s [%s]: %s", host->name, host->address, addr->message);
+ if (sx->host->next)
+ log_write(0, LOG_MAIN, "H=%s [%s]: %s",
+ sx->host->name, sx->host->address, addr->message);
#ifndef DISABLE_EVENT
- else
- msg_event_raise(US"msg:rcpt:defer", addr);
+ else
+ msg_event_raise(US"msg:rcpt:defer", addr);
#endif
- /* Do not put this message on the list of those waiting for specific
- hosts, as otherwise it is likely to be tried too often. */
+ /* Do not put this message on the list of those waiting for specific
+ hosts, as otherwise it is likely to be tried too often. */
- update_waiting = FALSE;
+ 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. */
+ /* 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. */
- 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);
+ 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))
+ !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '3', ob->command_timeout))
{
int code;
uschar *msg;
BOOL pass_message;
if (pending_DATA > 0 || (yield & 1) != 0)
{
- if (errno == 0 && buffer[0] == '4')
+ if (errno == 0 && sx->buffer[0] == '4')
{
errno = ERRNO_DATA4XX;
- addrlist->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
}
return -3;
}
- (void)check_response(host, &errno, 0, buffer, &code, &msg, &pass_message);
+ (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);
}
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. */
+
+/* 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)
-uschar
-ehlo_response(uschar * buf, size_t bsize, uschar checks)
+static uschar
+ehlo_response(uschar * buf, uschar checks)
{
+size_t bsize = Ustrlen(buf);
+
#ifdef SUPPORT_TLS
if ( checks & PEER_OFFERED_TLS
&& pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
{
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;
-uschar * buffer = tctx->buffer;
-
/* Write SMTP chunk header command */
if (chunk_size > 0)
- if((cmd_count = smtp_write_command(tctx->outblock, FALSE, "BDAT %u%s\r\n",
+ {
+ if((cmd_count = smtp_write_command(&sx->outblock, FALSE, "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 += tctx->cmd_count;
+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 (tctx->pending_BDAT)
+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(tctx->first_addr, tctx->tblock->rcpt_include_affixes,
- tctx->sync_addr, tctx->host, prev_cmd_count,
- ob->address_retry_include_sender,
- tctx->pending_MAIL, 0,
- tctx->inblock,
- ob->command_timeout,
- buffer, DELIVER_BUFFER_SIZE))
+ switch(sync_responses(sx, prev_cmd_count, 0))
{
case 1: /* 2xx (only) => OK */
- case 3: tctx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */
- case 2: *tctx->completed_address = TRUE; /* 5xx (only) => progress made */
+ 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 (!tctx->pending_BDAT)
+ if (!sx->pending_BDAT)
pipelining_active = FALSE;
}
/* Reap response for an outstanding BDAT */
-if (tctx->pending_BDAT)
+if (sx->pending_BDAT)
{
DEBUG(D_transport) debug_printf("look for one response for BDAT\n");
- if (!smtp_read_response(tctx->inblock, buffer, DELIVER_BUFFER_SIZE, '2',
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
ob->command_timeout))
{
- if (errno == 0 && buffer[0] == '4')
+ if (errno == 0 && sx->buffer[0] == '4')
{
errno = ERRNO_DATA4XX; /*XXX does this actually get used? */
- tctx->first_addr->more_errno |=
- ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ sx->addrlist->more_errno |=
+ ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
}
return ERROR;
}
cmd_count--;
- tctx->pending_BDAT = FALSE;
+ sx->pending_BDAT = FALSE;
pipelining_active = FALSE;
}
else if (chunk_size > 0)
- tctx->pending_BDAT = TRUE;
+ sx->pending_BDAT = TRUE;
-tctx->cmd_count = cmd_count;
+sx->cmd_count = cmd_count;
return OK;
}
/*************************************************
-* Deliver address list to given host *
+* Make connection for given message *
*************************************************/
-/* 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
- port default TCP/IP port to use, 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.
+ 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;
- the result for each address is in its data block.
+ 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 - 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
+ ERROR - 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 port,
- uschar *interface, transport_instance *tblock,
- BOOL *message_defer, BOOL suppress_tls)
+int
+smtp_setup_conn(smtp_context * sx, 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);
-struct lflags {
- BOOL lmtp:1;
- BOOL smtps:1;
- BOOL ok:1;
- BOOL send_rset:1;
- BOOL send_quit:1;
- BOOL setting_up:1;
- BOOL esmtp:1;
- BOOL esmtp_sent:1;
- BOOL pending_MAIL:1;
-#ifndef DISABLE_PRDR
- BOOL prdr_active:1;
-#endif
-#ifdef SUPPORT_I18N
- BOOL utf8_needed:1;
-#endif
- BOOL dsn_all_lasthop:1;
-#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
- BOOL dane:1;
- BOOL dane_required:1;
-#endif
-} lflags;
-
-BOOL pass_message = FALSE;
-BOOL completed_address = FALSE;
-uschar peer_offered = 0;
#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
dns_answer tlsa_dnsa;
#endif
-smtp_inblock inblock;
-smtp_outblock outblock;
-int max_rcpt = tblock->max_addresses;
-uschar *igquotstr = US"";
-
-#ifdef EXPERIMENTAL_DSN_INFO
-uschar *smtp_greeting = NULL;
-uschar *helo_response = NULL;
-#endif
-uschar *helo_data = NULL;
-
-uschar *message = NULL;
-uschar new_message_id[MESSAGE_ID_LENGTH + 1];
-uschar *p;
-uschar buffer[DELIVER_BUFFER_SIZE];
-uschar inbuffer[4096];
-uschar outbuffer[4096];
+BOOL pass_message = FALSE;
+uschar * message = NULL;
+int yield = OK;
+int rc;
-suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
+sx->ob = (smtp_transport_options_block *) sx->tblock->options_block;
-lflags.lmtp = strcmpic(ob->protocol, US"lmtp") == 0;
-lflags.smtps = strcmpic(ob->protocol, US"smtps") == 0;
-lflags.ok = FALSE;
-lflags.send_rset = TRUE;
-lflags.send_quit = TRUE;
-lflags.setting_up = TRUE;
-lflags.esmtp = TRUE;
-lflags.esmtp_sent = FALSE;
-#ifndef DISABLE_PRDR
-lflags.prdr_active;
-#endif
+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
-lflags.utf8_needed = FALSE;
+sx->utf8_needed = FALSE;
#endif
-lflags.dsn_all_lasthop = TRUE;
+sx->dsn_all_lasthop = TRUE;
#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
-lflags.dane = FALSE;
-lflags.dane_required = verify_check_given_host(&ob->hosts_require_dane, host) == OK;
+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->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
-*message_defer = FALSE;
smtp_command = US"initial connection";
-if (max_rcpt == 0) max_rcpt = 999999;
+sx->buffer[0] = '\0';
/* Set up the buffer for reading SMTP response packets. */
-inblock.buffer = inbuffer;
-inblock.buffersize = sizeof(inbuffer);
-inblock.ptr = inbuffer;
-inblock.ptrend = inbuffer;
+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 */
-outblock.buffer = outbuffer;
-outblock.buffersize = sizeof(outbuffer);
-outblock.ptr = outbuffer;
-outblock.cmd_count = 0;
-outblock.authenticating = FALSE;
+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. */
/* 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 as we're in a subprocess. */
+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 (lflags.smtps)
+if (sx->smtps)
{
- set_errno_nohost(addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
+ set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
DEFER, FALSE);
return ERROR;
}
if (continue_hostname == NULL)
{
+ if (sx->verify)
+ HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port);
+
/* This puts port into host->port */
- inblock.sock = outblock.sock =
- smtp_connect(host, host_af, port, interface, ob->connect_timeout, tblock);
+ sx->inblock.sock = sx->outblock.sock =
+ smtp_connect(sx->host, sx->host_af, sx->port, sx->interface,
+ sx->ob->connect_timeout, sx->tblock);
- if (inblock.sock < 0)
+ if (sx->inblock.sock < 0)
{
- set_errno_nohost(addrlist, errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno,
- NULL, DEFER, FALSE);
+ 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;
}
tls_out.dane_verified = FALSE;
tls_out.tlsa_usage = 0;
- if (host->dnssec == DS_YES)
+ if (sx->host->dnssec == DS_YES)
{
- if( lflags.dane_required
- || verify_check_given_host(&ob->hosts_try_dane, host) == OK
+ if( sx->dane_required
+ || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK
)
- switch (rc = tlsa_lookup(host, &tlsa_dnsa, lflags.dane_required))
+ switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required))
{
- case OK: lflags.dane = TRUE; break;
+ case OK: sx->dane = TRUE; break;
case FAIL_FORCED: break;
- default: set_errno_nohost(addrlist, ERRNO_DNSDEFER,
+ default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
string_sprintf("DANE error: tlsa lookup %s",
rc == DEFER ? "DEFER" : "FAIL"),
rc, FALSE);
return rc;
}
}
- else if (lflags.dane_required)
+ else if (sx->dane_required)
{
- set_errno_nohost(addrlist, ERRNO_DNSDEFER,
- string_sprintf("DANE error: %s lookup not DNSSEC", host->name),
+ set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
+ string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name),
FAIL, FALSE);
return FAIL;
}
- if (lflags.dane)
- ob->tls_tempfail_tryclear = FALSE;
+ if (sx->dane)
+ sx->ob->tls_tempfail_tryclear = FALSE;
}
#endif /*DANE*/
sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
delayed till here so that $sending_interface and $sending_port are set. */
- helo_data = expand_string(ob->helo_data);
+ 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 (helo_data)
+ if (sx->helo_data)
{
- uschar * errstr = NULL;
- if ((helo_data = string_domain_utf8_to_alabel(helo_data, &errstr)), errstr)
- {
- errstr = string_sprintf("failed to expand helo_data: %s", errstr);
- set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
- yield = DEFER;
- goto SEND_QUIT;
- }
+ 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
is nevertheless a reasonably clean way of programming this kind of logic,
where you want to escape on any error. */
- if (!lflags.smtps)
+ if (!sx->smtps)
{
- BOOL good_response = smtp_read_response(&inblock, buffer, sizeof(buffer),
- '2', ob->command_timeout);
+ BOOL good_response;
+
+#ifdef TCP_QUICKACK
+ (void) setsockopt(sx->inblock.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
- smtp_greeting = string_copy(buffer);
+ sx->smtp_greeting = string_copy(sx->buffer);
#endif
if (!good_response) goto RESPONSE_FAILED;
#ifndef DISABLE_EVENT
{
uschar * s;
- lookup_dnssec_authenticated = host->dnssec==DS_YES ? US"yes"
- : host->dnssec==DS_NO ? US"no" : NULL;
- s = event_raise(tblock->event_action, US"smtp:connect", buffer);
+ 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(addrlist, ERRNO_EXPANDFAIL,
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL,
string_sprintf("deferred by smtp:connect event expansion: %s", s),
DEFER, FALSE);
yield = DEFER;
/* Now check if the helo_data expansion went well, and sign off cleanly if
it didn't. */
- if (helo_data == NULL)
+ if (!sx->helo_data)
{
- uschar *message = string_sprintf("failed to expand helo_data: %s",
+ message = string_sprintf("failed to expand helo_data: %s",
expand_string_message);
- set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
yield = DEFER;
goto SEND_QUIT;
}
}
/** Debugging without sending a message
-addrlist->transport_return = DEFER;
+sx->addrlist->transport_return = DEFER;
goto SEND_QUIT;
**/
mailers use upper case for some reason (the RFC is quite clear about case
independence) so, for peace of mind, I gave in. */
- lflags.esmtp = verify_check_given_host(&ob->hosts_avoid_esmtp, host) != 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 (lflags.smtps)
+ if (sx->smtps)
{
smtp_peer_options |= PEER_OFFERED_TLS;
suppress_tls = FALSE;
- ob->tls_tempfail_tryclear = FALSE;
+ sx->ob->tls_tempfail_tryclear = FALSE;
smtp_command = US"SSL-on-connect";
goto TLS_NEGOTIATE;
}
#endif
- if (lflags.esmtp)
+ if (sx->esmtp)
{
- if (smtp_write_command(&outblock, FALSE, "%s %s\r\n",
- lflags.lmtp ? "LHLO" : "EHLO", helo_data) < 0)
+ if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n",
+ sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0)
goto SEND_FAILED;
- lflags.esmtp_sent = TRUE;
- 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 || lflags.lmtp)
+ if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp)
{
#ifdef EXPERIMENTAL_DSN_INFO
- helo_response = string_copy(buffer);
+ sx->helo_response = string_copy(sx->buffer);
#endif
goto RESPONSE_FAILED;
}
- lflags.esmtp = FALSE;
+ sx->esmtp = FALSE;
}
#ifdef EXPERIMENTAL_DSN_INFO
- helo_response = string_copy(buffer);
+ sx->helo_response = string_copy(sx->buffer);
#endif
}
else
DEBUG(D_transport)
debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
- if (!lflags.esmtp)
+ if (!sx->esmtp)
{
BOOL good_response;
- int n = sizeof(buffer);
- uschar * rsp = buffer;
+ int n = sizeof(sx->buffer);
+ uschar * rsp = sx->buffer;
- if (lflags.esmtp_sent && (n = Ustrlen(buffer)) < sizeof(buffer)/2)
- { rsp = buffer + n + 1; n = sizeof(buffer) - n; }
+ 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(&outblock, FALSE, "HELO %s\r\n", helo_data) < 0)
+ if (smtp_write_command(&sx->outblock, FALSE, "HELO %s\r\n", sx->helo_data) < 0)
goto SEND_FAILED;
- good_response = smtp_read_response(&inblock, rsp, n,
- '2', ob->command_timeout);
+ good_response = smtp_read_response(&sx->inblock, rsp, n,
+ '2', sx->ob->command_timeout);
#ifdef EXPERIMENTAL_DSN_INFO
- helo_response = string_copy(rsp);
+ 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 != buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
+ if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
{
- message = NULL;
- lflags.send_quit = FALSE;
- save_errno = ERRNO_SMTPCLOSED;
- message = string_sprintf("Remote host closed connection "
- "in response to %s (EHLO response was: %s)",
- smtp_command, buffer);
- goto FAILED;
+ errno = ERRNO_SMTPCLOSED;
+ goto EHLOHELO_FAILED;
}
- Ustrncpy(buffer, rsp, sizeof(buffer)/2);
+ Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2);
goto RESPONSE_FAILED;
}
}
- peer_offered = smtp_peer_options = 0;
+ sx->peer_offered = smtp_peer_options = 0;
- if (lflags.esmtp || lflags.lmtp)
+ if (sx->esmtp || sx->lmtp)
{
- peer_offered = ehlo_response(buffer, Ustrlen(buffer),
+ sx->peer_offered = ehlo_response(sx->buffer,
PEER_OFFERED_TLS /* others checked later */
);
/* Set tls_offered if the response to EHLO specifies support for STARTTLS. */
#ifdef SUPPORT_TLS
- smtp_peer_options |= peer_offered & PEER_OFFERED_TLS;
+ smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS;
#endif
}
}
connection on. */
/*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c
-as the contine goes via transport_pass_socket() and doublefork and exec.
+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);
+ sx->inblock.sock = sx->outblock.sock = 0; /* stdin */
smtp_command = big_buffer;
- host->port = port; /* Record the port that was used */
+ sx->host->port = sx->port; /* Record the port that was used */
+ sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */
+
+ /* For a continued connection with TLS being proxied for us, nothing
+ more to do. */
+
+ if (continue_proxy)
+ {
+ sx->peer_offered = smtp_peer_options;
+ pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
+ HDEBUG(D_transport) debug_printf("continued connection, proxied TLS\n");
+ 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
#ifdef SUPPORT_TLS
if ( smtp_peer_options & PEER_OFFERED_TLS
&& !suppress_tls
- && verify_check_given_host(&ob->hosts_avoid_tls, host) != OK)
+ && 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, FALSE, "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))
{
if ( errno != 0
|| buffer2[0] == 0
- || (buffer2[0] == '4' && !ob->tls_tempfail_tryclear)
+ || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear)
)
{
- Ustrncpy(buffer, buffer2, sizeof(buffer));
+ Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer));
+ sx->buffer[sizeof(sx->buffer)-1] = '\0';
goto RESPONSE_FAILED;
}
}
else
TLS_NEGOTIATE:
{
- int rc = tls_client_start(inblock.sock, host, addrlist, tblock
+ address_item * addr;
+ uschar * errstr;
+ int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock,
# ifdef EXPERIMENTAL_DANE
- , lflags.dane ? &tlsa_dnsa : NULL
+ sx->dane ? &tlsa_dnsa : NULL,
# endif
- );
+ &errstr);
/* 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
if (rc != OK)
{
# ifdef EXPERIMENTAL_DANE
- if (rc == DEFER && lflags.dane)
- {
- log_write(0, LOG_MAIN,
- "DANE attempt failed; no TLS connection to %s [%s]",
- host->name, host->address);
- }
+ if (sx->dane) log_write(0, LOG_MAIN,
+ "DANE attempt failed; TLS connection to %s [%s]: %s",
+ sx->host->name, sx->host->address, errstr);
# endif
- save_errno = ERRNO_TLSFAILURE;
- message = US"failure while setting up TLS session";
- lflags.send_quit = FALSE;
+ errno = ERRNO_TLSFAILURE;
+ message = string_sprintf("TLS session: %s", errstr);
+ sx->send_quit = FALSE;
goto TLS_FAILED;
}
/* TLS session is set up */
smtp_peer_options_wrap = smtp_peer_options;
- for (addr = addrlist; addr; addr = addr->next)
+ for (addr = sx->addrlist; addr; addr = addr->next)
if (addr->transport_return == PENDING_DEFER)
{
addr->cipher = tls_out.cipher;
char *greeting_cmd;
BOOL good_response;
- if (helo_data == NULL)
+ 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_nohost(addrlist, ERRNO_EXPANDFAIL, 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 (lflags.smtps)
+ if (sx->smtps)
{
- good_response = smtp_read_response(&inblock, buffer, sizeof(buffer),
- '2', ob->command_timeout);
+ good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', sx->ob->command_timeout);
#ifdef EXPERIMENTAL_DSN_INFO
- smtp_greeting = string_copy(buffer);
+ sx->smtp_greeting = string_copy(sx->buffer);
#endif
if (!good_response) goto RESPONSE_FAILED;
}
- if (lflags.esmtp)
+ if (sx->esmtp)
greeting_cmd = "EHLO";
else
{
debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
}
- if (smtp_write_command(&outblock, FALSE, "%s %s\r\n",
- lflags.lmtp ? "LHLO" : greeting_cmd, helo_data) < 0)
+ if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n",
+ sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0)
goto SEND_FAILED;
- good_response = smtp_read_response(&inblock, buffer, sizeof(buffer),
- '2', ob->command_timeout);
+ good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
+ '2', sx->ob->command_timeout);
#ifdef EXPERIMENTAL_DSN_INFO
- helo_response = string_copy(buffer);
+ 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 ( lflags.smtps
+else if ( sx->smtps
# ifdef EXPERIMENTAL_DANE
- || lflags.dane
+ || sx->dane
# endif
- || verify_check_given_host(&ob->hosts_require_tls, host) == OK
+ || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK
)
{
- save_errno = ERRNO_TLSREQUIRED;
+ errno = ERRNO_TLSREQUIRED;
message = string_sprintf("a TLS session is required, but %s",
smtp_peer_options & PEER_OFFERED_TLS
? "an attempt to start TLS failed" : "the server did not offer TLS support");
#endif
)
{
- if (lflags.esmtp || lflags.lmtp)
+ if (sx->esmtp || sx->lmtp)
{
- peer_offered = ehlo_response(buffer, Ustrlen(buffer),
- 0 /* no TLS */
- | (lflags.lmtp && ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0)
- | PEER_OFFERED_CHUNKING
- | PEER_OFFERED_PRDR
+ sx->peer_offered = ehlo_response(sx->buffer,
+ 0 /* no TLS */
+ | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0)
+ | PEER_OFFERED_CHUNKING
+ | PEER_OFFERED_PRDR
#ifdef SUPPORT_I18N
- | (addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0)
- /*XXX if we hand peercaps on to continued-conn processes,
- must not depend on this addr */
+ | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0)
+ /*XXX if we hand peercaps on to continued-conn processes,
+ must not depend on this addr */
#endif
- | PEER_OFFERED_DSN
- | PEER_OFFERED_PIPE
- | (ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0)
+ | PEER_OFFERED_DSN
+ | PEER_OFFERED_PIPE
+ | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0)
);
/* Set for IGNOREQUOTA if the response to LHLO specifies support and the
lmtp_ignore_quota option was set. */
- igquotstr = peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US"";
+ sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US"";
/* If the response to EHLO specified support for the SIZE parameter, note
this, provided size_addition is non-negative. */
- smtp_peer_options |= peer_offered & PEER_OFFERED_SIZE;
+ smtp_peer_options |= sx->peer_offered & PEER_OFFERED_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. */
- if ( peer_offered & PEER_OFFERED_PIPE
- && verify_check_given_host(&ob->hosts_avoid_pipelining, host) != OK)
+ if ( sx->peer_offered & PEER_OFFERED_PIPE
+ && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK)
smtp_peer_options |= PEER_OFFERED_PIPE;
DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not ");
- if ( peer_offered & PEER_OFFERED_CHUNKING
- && verify_check_given_host(&ob->hosts_try_chunking, host) != OK)
- peer_offered &= ~PEER_OFFERED_CHUNKING;
+ if ( sx->peer_offered & PEER_OFFERED_CHUNKING
+ && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK)
+ sx->peer_offered &= ~PEER_OFFERED_CHUNKING;
- if (peer_offered & PEER_OFFERED_CHUNKING)
+ if (sx->peer_offered & PEER_OFFERED_CHUNKING)
{DEBUG(D_transport) debug_printf("CHUNKING usable\n");}
#ifndef DISABLE_PRDR
- if ( peer_offered & PEER_OFFERED_PRDR
- && verify_check_given_host(&ob->hosts_try_prdr, host) != OK)
- peer_offered &= ~PEER_OFFERED_PRDR;
+ if ( sx->peer_offered & PEER_OFFERED_PRDR
+ && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK)
+ sx->peer_offered &= ~PEER_OFFERED_PRDR;
- if (peer_offered & PEER_OFFERED_PRDR)
+ if (sx->peer_offered & PEER_OFFERED_PRDR)
{DEBUG(D_transport) debug_printf("PRDR usable\n");}
#endif
/* Note if the server supports DSN */
- smtp_peer_options |= peer_offered & PEER_OFFERED_DSN;
+ smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN;
DEBUG(D_transport) debug_printf("%susing DSN\n",
- peer_offered & PEER_OFFERED_DSN ? "" : "not ");
+ sx->peer_offered & PEER_OFFERED_DSN ? "" : "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. */
- switch (yield = smtp_auth(buffer, sizeof(buffer), addrlist, host,
- ob, lflags.esmtp, &inblock, &outblock))
+ 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;
/* The setting up of the SMTP call is now complete. Any subsequent errors are
message-specific. */
-lflags.setting_up = FALSE;
+sx->setting_up = FALSE;
#ifdef SUPPORT_I18N
-if (addrlist->prop.utf8_msg)
+if (sx->addrlist->prop.utf8_msg)
{
- lflags.utf8_needed = !addrlist->prop.utf8_downcvt
- && !addrlist->prop.utf8_downcvt_maybe;
- DEBUG(D_transport) if (!lflags.utf8_needed)
+ 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",
- addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
+ sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
}
/* If this is an international message we need the host to speak SMTPUTF8 */
-if (lflags.utf8_needed && !(peer_offered & PEER_OFFERED_UTF8))
+if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8))
{
errno = ERRNO_UTF8_FWD;
goto RESPONSE_FAILED;
}
#endif
-/* 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. */
+return OK;
-if (tblock->filter_command != NULL)
- {
- 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);
- transport_filter_timeout = tblock->filter_timeout;
- /* On failure, copy the error to all addresses, abandon the SMTP call, and
- yield ERROR. */
+ {
+ int code;
- if (!rc)
- {
- set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
- FALSE);
- yield = ERROR;
- goto SEND_QUIT;
- }
+ RESPONSE_FAILED:
+ message = NULL;
+ sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno,
+ sx->buffer, &code, &message, &pass_message);
+ goto FAILED;
- if ( transport_filter_argv
- && *transport_filter_argv
- && **transport_filter_argv
- && peer_offered & PEER_OFFERED_CHUNKING
- )
- {
- peer_offered &= ~PEER_OFFERED_CHUNKING;
- DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
- }
- }
+ 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;
+ 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. */
-/* 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. */
+ 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;
+ goto FAILED;
-SEND_MESSAGE:
-sync_addr = first_addr;
-address_count = 0;
-lflags.ok = FALSE;
-lflags.send_rset = TRUE;
-completed_address = FALSE;
+#ifdef SUPPORT_TLS
+ TLS_FAILED:
+ code = '4';
+ 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, 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. */
-/* 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
-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.) */
+FAILED:
+ sx->ok = FALSE; /* For when reached by GOTO */
-p = buffer;
-*p = 0;
+ yield = code == '5'
+#ifdef SUPPORT_I18N
+ || errno == ERRNO_UTF8_FWD
+#endif
+ ? FAIL : DEFER;
-if (peer_offered & PEER_OFFERED_SIZE)
- {
- sprintf(CS p, " SIZE=%d", message_size+message_linecount+ob->size_addition);
- while (*p) p++;
+ set_errno(sx->addrlist, errno, message, yield, pass_message, sx->host
+#ifdef EXPERIMENTAL_DSN_INFO
+ , sx->smtp_greeting, sx->helo_response
+#endif
+ );
}
-#ifndef DISABLE_PRDR
-lflags.prdr_active = FALSE;
-if (peer_offered & PEER_OFFERED_PRDR)
- for (addr = first_addr; 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 */
- lflags.prdr_active = TRUE;
- sprintf(CS p, " PRDR"); p += 5;
- break;
- }
- break;
- }
-#endif
-#ifdef SUPPORT_I18N
-if ( addrlist->prop.utf8_msg
- && !addrlist->prop.utf8_downcvt
- && peer_offered & PEER_OFFERED_UTF8
- )
- sprintf(CS p, " SMTPUTF8"), p += 9;
+SEND_QUIT:
+
+if (sx->send_quit)
+ (void)smtp_write_command(&sx->outblock, FALSE, "QUIT\r\n");
+
+#ifdef SUPPORT_TLS
+tls_close(FALSE, TRUE);
#endif
-/* check if all addresses have lasthop flag */
-/* do not send RET and ENVID if true */
-for (lflags.dsn_all_lasthop = TRUE, addr = first_addr;
- address_count < max_rcpt && addr != NULL;
- addr = addr->next)
- if ((addr->dsn_flags & rf_dsnlasthop) != 1)
- {
- lflags.dsn_all_lasthop = FALSE;
- break;
- }
+/* 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,
-/* Add any DSN flags to the mail command */
+If all went well and continue_more is set, we shouldn't actually get here if
+there are further addresses, as the return above will be taken. However,
+writing RSET might have failed, or there may be other addresses whose hosts are
+specified in the transports, and therefore not visible at top level, in which
+case continue_more won't get set. */
-if (peer_offered & PEER_OFFERED_DSN && !lflags.dsn_all_lasthop)
+HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
+if (sx->send_quit)
{
- if (dsn_ret == dsn_ret_hdrs)
- { Ustrcpy(p, " RET=HDRS"); p += 9; }
+ shutdown(sx->outblock.sock, SHUT_WR);
+ if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0)
+ for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;)
+ rc--; /* drain socket */
+ sx->send_quit = FALSE;
+ }
+(void)close(sx->inblock.sock);
+sx->inblock.sock = sx->outblock.sock = -1;
+
+#ifndef DISABLE_EVENT
+(void) event_raise(sx->tblock->event_action, US"tcp:close", NULL);
+#endif
+
+continue_transport = NULL;
+continue_hostname = NULL;
+return yield;
+}
+
+
+
+
+/* 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,
+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.) */
+
+if (sx->peer_offered & PEER_OFFERED_SIZE)
+ {
+ 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 & PEER_OFFERED_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 & PEER_OFFERED_UTF8
+ && addrlist->prop.utf8_msg
+ && !addrlist->prop.utf8_downcvt
+ )
+ Ustrcpy(p, " SMTPUTF8"), p += 9;
+#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 & PEER_OFFERED_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(buffer) - (p-buffer), " ENVID=%s", dsn_envid);
+ string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid);
while (*p) p++;
}
}
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(buffer) - (p-buffer), addrlist, ob))
+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;
+
+/* Add any DSN flags to the rcpt command */
+
+if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop))
{
- yield = ERROR;
- goto SEND_QUIT;
+ 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++;
+ }
+ }
+}
+
+
+
+/*
+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)
+ {
+ *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. */
-lflags.pending_MAIL = TRUE; /* The block starts with MAIL */
+sx->pending_MAIL = TRUE; /* The block starts with MAIL */
{
- uschar * s = return_path;
+ uschar * s = sx->from_addr;
#ifdef SUPPORT_I18N
uschar * errstr = NULL;
for the to-addresses (done below), and also (ugly) for re-doing when building
the delivery log line. */
- if ( addrlist->prop.utf8_msg
- && (addrlist->prop.utf8_downcvt || !(peer_offered & PEER_OFFERED_UTF8))
+ if ( sx->addrlist->prop.utf8_msg
+ && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8))
)
{
- if (s = string_address_utf8_to_alabel(return_path, &errstr), errstr)
+ if (s = string_address_utf8_to_alabel(s, &errstr), errstr)
{
- set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
- yield = ERROR;
- goto SEND_QUIT;
+ set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
+ *yield = ERROR;
+ return -4;
}
- setflag(addrlist, af_utf8_downcvt);
+ setflag(sx->addrlist, af_utf8_downcvt);
}
#endif
- rc = smtp_write_command(&outblock, pipelining_active,
- "MAIL FROM:<%s>%s\r\n", s, buffer);
+ rc = smtp_write_command(&sx->outblock, pipelining_active,
+ "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 */
- goto SEND_FAILED;
+ return -5;
- case +1: /* Block was sent */
- if (!smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout))
+ case +1: /* Cmd was sent */
+ if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
+ sx->ob->command_timeout))
{
- if (errno == 0 && buffer[0] == '4')
+ if (errno == 0 && sx->buffer[0] == '4')
{
errno = ERRNO_MAIL4XX;
- addrlist->more_errno |= ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
}
- goto RESPONSE_FAILED;
+ return -1;
}
- lflags.pending_MAIL = FALSE;
+ 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 first_addr pointing to
+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. */
+that max_rcpt will be large, so all addresses will be done at once.
-for (addr = first_addr;
- addr && address_count < max_rcpt;
- addr = addr->next)
- if (addr->transport_return == PENDING_DEFER)
+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;
- addr->dsn_aware = peer_offered & PEER_OFFERED_DSN
+ addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN
? dsn_support_yes : dsn_support_no;
address_count++;
- no_flush = pipelining_active && (!mua_wrapper || addr->next);
-
- /* Add any DSN flags to the rcpt command and add to the sent string */
-
- p = buffer;
- *p = 0;
-
- if (peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop))
- {
- if (addr->dsn_flags & rf_dsnflags)
- {
- int i;
- BOOL first = TRUE;
- Ustrcpy(p, " NOTIFY=");
- while (*p) p++;
- for (i = 0; i < 4; i++)
- if ((addr->dsn_flags & rf_list[i]) != 0)
- {
- if (!first) *p++ = ',';
- first = FALSE;
- Ustrcpy(p, rf_names[i]);
- while (*p) p++;
- }
- }
+ no_flush = pipelining_active && !sx->verify && (!mua_wrapper || addr->next);
- if (addr->dsn_orcpt)
- {
- string_format(p, sizeof(buffer) - (p-buffer), " ORCPT=%s",
- addr->dsn_orcpt);
- while (*p) p++;
- }
- }
+ 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, tblock->rcpt_include_affixes);
+ rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes);
#ifdef SUPPORT_I18N
- {
- uschar * dummy_errstr;
- if ( testflag(addrlist, af_utf8_downcvt)
- && (rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, &dummy_errstr),
- dummy_errstr
- ) )
+ 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;
- goto SEND_FAILED;
+ return -5; /*XXX too harsh? */
}
- }
#endif
- count = smtp_write_command(&outblock, no_flush, "RCPT TO:<%s>%s%s\r\n",
- rcpt_addr, igquotstr, buffer);
+ count = smtp_write_command(&sx->outblock, no_flush, "RCPT TO:<%s>%s%s\r\n",
+ rcpt_addr, sx->igquotstr, sx->buffer);
- if (count < 0) goto SEND_FAILED;
+ if (count < 0) return -5;
if (count > 0)
{
- switch(sync_responses(first_addr, tblock->rcpt_include_affixes,
- &sync_addr, host, count, ob->address_retry_include_sender,
- lflags.pending_MAIL, 0, &inblock, ob->command_timeout, buffer,
- sizeof(buffer)))
+ switch(sync_responses(sx, count, 0))
{
- case 3: lflags.ok = TRUE; /* 2xx & 5xx => OK & progress made */
- case 2: completed_address = TRUE; /* 5xx (only) => progress made */
- break;
+ 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 */
- case 1: lflags.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
- if (!lflags.lmtp) completed_address = TRUE; /* can't tell about progress yet */
- case 0: /* No 2xx or 5xx, but no probs */
- break;
+sx->next_addr = addr;
+return 0;
+}
- case -1: goto END_OFF; /* Timeout on RCPT */
- default: goto RESPONSE_FAILED; /* I/O error, or any MAIL error */
+
+#ifdef SUPPORT_TLS
+/*****************************************************
+* Proxy TLS connection for another transport process *
+******************************************************/
+/*
+Use the smtp-context buffer as a staging area, and select on both the slave
+process and the TLS'd 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.
+
+Arguments:
+ sx smtp context block
+ proxy_fd comms to proxied process
+ timeout per-read timeout, seconds
+*/
+
+static void
+smtp_proxy_tls(smtp_context * sx, int proxy_fd, int timeout)
+{
+fd_set fds;
+int max_fd = MAX(proxy_fd, tls_out.active) + 1;
+int rc, i, fd_bits, nbytes;
+
+set_process_info("proxying TLS connection for continued transport");
+FD_ZERO(&fds);
+FD_SET(tls_out.active, &fds);
+FD_SET(proxy_fd, &fds);
+
+for (fd_bits = 3; fd_bits; )
+ {
+ time_t time_left = timeout;
+ time_t time_start = time(NULL);
+
+ /* wait for data */
+ do
+ {
+ struct timeval tv = { time_left, 0 };
+
+ rc = select(max_fd, (SELECT_ARG2_TYPE *)&fds, NULL, NULL, &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__);
+ return;
}
- lflags.pending_MAIL = FALSE; /* Dealt with MAIL */
}
- } /* Loop for next address */
+ while (rc < 0 || !(FD_ISSET(tls_out.active, &fds) || FD_ISSET(proxy_fd, &fds)));
+
+ /* handle inbound data */
+ if (FD_ISSET(tls_out.active, &fds))
+ if ((rc = tls_read(FALSE, sx->buffer, sizeof(sx->buffer))) <= 0)
+ {
+ fd_bits &= ~1;
+ FD_CLR(tls_out.active, &fds);
+ shutdown(proxy_fd, SHUT_WR);
+ }
+ else
+ {
+ for (nbytes = 0; rc - nbytes > 0; nbytes += i)
+ if ((i = write(proxy_fd, sx->buffer + nbytes, rc - nbytes)) < 0) return;
+ }
+ else if (fd_bits & 1)
+ FD_SET(tls_out.active, &fds);
+
+ /* handle outbound data */
+ if (FD_ISSET(proxy_fd, &fds))
+ if ((rc = read(proxy_fd, sx->buffer, sizeof(sx->buffer))) <= 0)
+ {
+ fd_bits &= ~2;
+ FD_CLR(proxy_fd, &fds);
+ shutdown(tls_out.active, SHUT_WR);
+ }
+ else
+ {
+ for (nbytes = 0; rc - nbytes > 0; nbytes += i)
+ if ((i = tls_write(FALSE, sx->buffer + nbytes, rc - nbytes)) < 0) return;
+ }
+ else if (fd_bits & 2)
+ FD_SET(proxy_fd, &fds);
+ }
+}
+#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
+ port default TCP/IP port to use, 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 port,
+ uschar *interface, transport_instance *tblock,
+ BOOL *message_defer, BOOL suppress_tls)
+{
+address_item *addr;
+int yield = OK;
+int save_errno;
+int rc;
+time_t start_delivery_time = time(NULL);
+
+BOOL pass_message = FALSE;
+uschar *message = NULL;
+uschar new_message_id[MESSAGE_ID_LENGTH + 1];
+uschar *p;
+
+smtp_context sx;
+
+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 = port;
+sx.interface = interface;
+sx.helo_data = NULL;
+sx.tblock = tblock;
+sx.verify = FALSE;
+
+/* Get the channel set up ready for a message (MAIL FROM being the next
+SMTP command to send */
+
+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)
+ {
+ BOOL rc;
+ uschar fbuf[64];
+ sprintf(CS fbuf, "%.50s transport", tblock->name);
+ rc = transport_set_up_command(&transport_filter_argv, tblock->filter_command,
+ TRUE, DEFER, addrlist, fbuf, NULL);
+ transport_filter_timeout = tblock->filter_timeout;
+
+ /* On failure, copy the error to all addresses, abandon the SMTP call, and
+ yield ERROR. */
+
+ if (!rc)
+ {
+ 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 & PEER_OFFERED_CHUNKING
+ )
+ {
+ sx.peer_offered &= ~PEER_OFFERED_CHUNKING;
+ DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
+ }
+ }
+
+
+/* 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. */
+
+SEND_MESSAGE:
+sx.from_addr = return_path;
+sx.first_addr = sx.sync_addr = addrlist;
+sx.ok = FALSE;
+sx.send_rset = TRUE;
+sx.completed_addr = FALSE;
+
+
+/* Initiate a message transfer. */
+
+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;
+ }
/* 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
if (mua_wrapper)
{
address_item *badaddr;
- for (badaddr = first_addr; badaddr; badaddr = badaddr->next)
+ for (badaddr = sx.first_addr; badaddr; badaddr = badaddr->next)
if (badaddr->transport_return != PENDING_OK)
{
/*XXX could we find a better errno than 0 here? */
set_errno_nohost(addrlist, 0, badaddr->message, FAIL,
testflag(badaddr, af_pass_message));
- lflags.ok = FALSE;
+ sx.ok = FALSE;
break;
}
}
If using CHUNKING, do not send a BDAT until we know how big a chunk we want
to send is. */
-if ( !(peer_offered & PEER_OFFERED_CHUNKING)
- && (lflags.ok || (pipelining_active && !mua_wrapper)))
+if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING)
+ && (sx.ok || (pipelining_active && !mua_wrapper)))
{
- int count = smtp_write_command(&outblock, FALSE, "DATA\r\n");
+ int count = smtp_write_command(&sx.outblock, FALSE, "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, lflags.pending_MAIL,
- lflags.ok ? +1 : -1, &inblock, ob->command_timeout, buffer, sizeof(buffer)))
+ switch(sync_responses(&sx, count, sx.ok ? +1 : -1))
{
- case 3: lflags.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: lflags.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
- if (!lflags.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 */
}
/* If there were no good recipients (but otherwise there have been no
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 (!(peer_offered & PEER_OFFERED_CHUNKING) && !lflags.ok)
+if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok)
{
/* Save the first address of the next batch. */
- first_addr = addr;
+ sx.first_addr = sx.next_addr;
- lflags.ok = TRUE;
+ sx.ok = TRUE;
}
else
{
of responses. The callback needs a whole bunch of state so set up
a transport-context structure to be passed around. */
- if (peer_offered & PEER_OFFERED_CHUNKING)
+ if (sx.peer_offered & PEER_OFFERED_CHUNKING)
{
tctx.check_string = tctx.escape_string = NULL;
tctx.options |= topt_use_bdat;
tctx.chunk_cb = smtp_chunk_cmd_callback;
- tctx.inblock = &inblock;
- tctx.outblock = &outblock;
- tctx.host = host;
- tctx.first_addr = first_addr;
- tctx.sync_addr = &sync_addr;
- tctx.pending_MAIL = lflags.pending_MAIL;
- tctx.pending_BDAT = FALSE;
- tctx.good_RCPT = lflags.ok;
- tctx.completed_address = &completed_address;
- tctx.cmd_count = 0;
- tctx.buffer = buffer;
+ 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. */
- first_addr = addr;
+ sx.first_addr = sx.next_addr;
/* Responses from CHUNKING commands go in buffer. Otherwise,
there has not been a response. */
- buffer[0] = 0;
+ 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)
- if (peer_offered & PEER_OFFERED_CHUNKING)
+ if (sx.peer_offered & PEER_OFFERED_CHUNKING)
debug_printf(" will write message using CHUNKING\n");
else
debug_printf(" SMTP>> writing message and terminating \".\"\n");
transport_count = 0;
#ifndef DISABLE_DKIM
- lflags.ok = dkim_transport_write_message(inblock.sock, &tctx, &ob->dkim);
+ sx.ok = dkim_transport_write_message(sx.inblock.sock, &tctx, &sx.ob->dkim,
+ CUSS &message);
#else
- lflags.ok = transport_write_message(inblock.sock, &tctx, 0);
+ sx.ok = transport_write_message(sx.inblock.sock, &tctx, 0);
#endif
/* transport_write_message() uses write() because it is called from other
or the failure of a transport filter or the expansion of added headers.
Or, when CHUNKING, it can be a protocol-detected failure. */
- if (!lflags.ok)
- 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";
- if (peer_offered & PEER_OFFERED_CHUNKING && tctx.cmd_count > 1)
+ if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1)
{
/* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */
- switch(sync_responses(first_addr, tblock->rcpt_include_affixes, &sync_addr,
- host, tctx.cmd_count-1, ob->address_retry_include_sender,
- lflags.pending_MAIL, 0,
- &inblock, ob->command_timeout, buffer, sizeof(buffer)))
+ switch(sync_responses(&sx, sx.cmd_count-1, 0))
{
- case 3: lflags.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: lflags.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
- if (!lflags.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 */
* 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(lflags.prdr_active)
+ if(sx.prdr_active)
{
- lflags.ok = smtp_read_response(&inblock, buffer, sizeof(buffer), '3',
- ob->final_timeout);
- if (!lflags.ok && errno == 0) switch(buffer[0])
+ 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': lflags.prdr_active = FALSE;
- lflags.ok = TRUE;
+ case '2': sx.prdr_active = FALSE;
+ sx.ok = TRUE;
break;
case '4': errno = ERRNO_DATA4XX;
addrlist->more_errno |=
- ((buffer[1] - '0')*10 + buffer[2] - '0') << 8;
+ ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
break;
}
}
/* 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 (!lflags.lmtp)
+ if (!sx.lmtp)
{
- lflags.ok = smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->final_timeout);
- if (!lflags.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 (lflags.ok)
+ if (sx.ok)
{
int flag = '=';
int delivery_time = (int)(time(NULL) - start_delivery_time);
int len;
uschar *conf = NULL;
- lflags.send_rset = FALSE;
+ sx.send_rset = FALSE;
pipelining_active = FALSE;
/* Set up confirmation if needed - applies only to SMTP */
#ifdef DISABLE_EVENT
LOGGING(smtp_confirmation) &&
#endif
- !lflags.lmtp
+ !sx.lmtp
)
{
- const uschar *s = string_printing(buffer);
+ const uschar *s = string_printing(sx.buffer);
/* deconst cast ok here as string_printing was checked to have alloc'n'copied */
- conf = (s == buffer)? (uschar *)string_copy(s) : US s;
+ conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s;
}
/* 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;
it doesn't get tried again too soon. */
#ifndef DISABLE_PRDR
- if (lflags.lmtp || lflags.prdr_active)
+ if (sx.lmtp || sx.prdr_active)
#else
- if (lflags.lmtp)
+ 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;
+ if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED;
addr->message = string_sprintf(
#ifndef DISABLE_PRDR
- "%s error after %s: %s", lflags.prdr_active ? "PRDR":"LMTP",
+ "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP",
#else
"LMTP error after %s: %s",
#endif
- big_buffer, string_printing(buffer));
+ 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;
#ifndef DISABLE_PRDR
- if (!lflags.prdr_active)
+ 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(buffer);
+ const uschar *s = string_printing(sx.buffer);
/* deconst cast ok here as string_printing was checked to have alloc'n'copied */
- conf = (s == buffer)? (uschar *)string_copy(s) : US s;
+ conf = (s == sx.buffer) ? US string_copy(s) : US s;
}
}
addr->special_action = flag;
addr->message = conf;
#ifndef DISABLE_PRDR
- if (lflags.prdr_active) addr->flags |= af_prdr_used;
+ if (sx.prdr_active) addr->flags |= af_prdr_used;
#endif
- if (peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used;
+ if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used;
flag = '-';
#ifndef DISABLE_PRDR
- if (!lflags.prdr_active)
+ if (!sx.prdr_active)
#endif
{
/* Update the journal. For homonymic addresses, use the base address plus
write error, as it may prove possible to update the spool file later. */
if (testflag(addr, af_homonym))
- sprintf(CS buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
+ sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
else
- sprintf(CS buffer, "%.500s\n", addr->unique);
+ sprintf(CS sx.buffer, "%.500s\n", addr->unique);
- DEBUG(D_deliver) debug_printf("journalling %s\n", buffer);
- len = Ustrlen(CS buffer);
- if (write(journal_fd, buffer, len) != len)
+ DEBUG(D_deliver) debug_printf("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", buffer, strerror(errno));
+ "%s: %s", sx.buffer, strerror(errno));
}
}
#ifndef DISABLE_PRDR
- if (lflags.prdr_active)
+ if (sx.prdr_active)
{
/* PRDR - get the final, overall response. For any non-success
upgrade all the address statuses. */
- lflags.ok = smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->final_timeout);
- if (!lflags.ok)
+ sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
+ sx.ob->final_timeout);
+ if (!sx.ok)
{
- if(errno == 0 && buffer[0] == '4')
+ if(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;
}
- for (addr = addrlist; addr != first_addr; addr = addr->next)
- if (buffer[0] == '5' || addr->transport_return == OK)
+ 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;
}
/* Update the journal, or setup retry. */
- for (addr = addrlist; addr != first_addr; addr = addr->next)
+ for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
if (addr->transport_return == OK)
- {
- if (testflag(addr, af_homonym))
- sprintf(CS buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
- else
- sprintf(CS buffer, "%.500s\n", addr->unique);
-
- DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", 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));
- }
- else if (addr->transport_return == DEFER)
- retry_add_item(addr, addr->address_retry_key, -2);
+ {
+ 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
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 (!lflags.ok)
+if (!sx.ok)
{
int code, set_rc;
uschar * set_message;
{
save_errno = errno;
message = NULL;
- lflags.send_quit = check_response(host, &save_errno, addrlist->more_errno,
- buffer, &code, &message, &pass_message);
+ sx.send_quit = check_response(host, &save_errno, addrlist->more_errno,
+ sx.buffer, &code, &message, &pass_message);
goto FAILED;
}
{
save_errno = errno;
code = '4';
- message = US string_sprintf("send() to %s [%s] failed: %s",
- host->name, host->address, strerror(save_errno));
- lflags.send_quit = FALSE;
+ 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;
}
- /* 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. */
-
FAILED:
- lflags.ok = FALSE; /* For when reached by GOTO */
- set_message = message;
+ {
+ BOOL message_error;
- if (lflags.setting_up)
- if (code == '5')
- set_rc = FAIL;
- else
- yield = set_rc = DEFER;
+ 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)
{
-#ifdef SUPPORT_I18N
- case ERRNO_UTF8_FWD:
- code = '5';
- /*FALLTHROUGH*/
-#endif
case 0:
case ERRNO_MAIL4XX:
case ERRNO_DATA4XX:
set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host
#ifdef EXPERIMENTAL_DSN_INFO
- , smtp_greeting, helo_response
+ , 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", lflags.ok, lflags.send_quit,
- lflags.send_rset, continue_more, yield, first_addr ? "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 && lflags.ok && lflags.send_quit)
+if (sx.completed_addr && sx.ok && sx.send_quit)
{
BOOL more;
smtp_compare_t t_compare;
t_compare.tblock = tblock;
t_compare.current_sender_address = sender_address;
- if ( first_addr != NULL
+ if ( sx.first_addr != NULL
|| continue_more
- || ( ( tls_out.active < 0
- || verify_check_given_host(&ob->hosts_nopass_tls, host) != OK
+ || (
+#ifdef SUPPORT_TLS
+ ( tls_out.active < 0 && !continue_proxy
+ || 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,
(oicf)smtp_are_same_identities, (void*)&t_compare)
uschar *msg;
BOOL pass_message;
- if (lflags.send_rset)
- {
- if (! (lflags.ok = smtp_write_command(&outblock, FALSE, "RSET\r\n") >= 0))
+ if (sx.send_rset)
+ if (! (sx.ok = smtp_write_command(&sx.outblock, FALSE, "RSET\r\n") >= 0))
{
msg = US string_sprintf("send() to %s [%s] failed: %s", host->name,
- host->address, strerror(save_errno));
- lflags.send_quit = FALSE;
+ host->address, strerror(errno));
+ sx.send_quit = FALSE;
}
- else if (! (lflags.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;
- lflags.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 (!lflags.send_quit)
+ if (!sx.send_quit)
{
DEBUG(D_transport) debug_printf("H=%s [%s] %s\n",
host->name, host->address, msg);
}
}
- }
/* Either RSET was not needed, or it succeeded */
- if (lflags.ok)
+ if (sx.ok)
{
- if (first_addr != NULL) /* More addresses still to be sent */
+ int pfd[2];
+ int socket_fd = sx.inblock.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. */
-
+ /* Pass the connection on to a new Exim process. */
#ifdef SUPPORT_TLS
if (tls_out.active >= 0)
- {
- tls_close(FALSE, TRUE);
- smtp_peer_options = smtp_peer_options_wrap;
- if (lflags.smtps)
- lflags.ok = FALSE;
- else
- lflags.ok = smtp_write_command(&outblock,FALSE,"EHLO %s\r\n",helo_data) >= 0 &&
- smtp_read_response(&inblock, buffer, sizeof(buffer), '2',
- ob->command_timeout);
- }
+ if (verify_check_given_host(&sx.ob->hosts_noproxy_tls, host) == OK)
+ {
+ /* Pass the socket, for direct use, 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. */
+
+ tls_close(FALSE, TRUE);
+ smtp_peer_options = smtp_peer_options_wrap;
+ sx.ok = !sx.smtps
+ && smtp_write_command(&sx.outblock, FALSE,
+ "EHLO %s\r\n", sx.helo_data) >= 0
+ && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer),
+ '2', sx.ob->command_timeout);
+ }
+ else
+ {
+ /* Set up a pipe for proxying TLS for the new transport process */
+
+ smtp_peer_options |= PEER_OFFERED_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
+ );
+ }
#endif
- /* 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. */
/*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to
propagate it from the initial
*/
- if (lflags.ok && transport_pass_socket(tblock->name, host->name,
- host->address, new_message_id, inblock.sock))
- lflags.send_quit = FALSE;
+ if (sx.ok && transport_pass_socket(tblock->name, host->name,
+ host->address, new_message_id, socket_fd))
+ {
+ sx.send_quit = FALSE;
+
+ /* 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. */
+
+ if (tls_out.active >= 0)
+ {
+ int pid = fork();
+ if (pid > 0) /* parent */
+ {
+ tls_close(FALSE, FALSE);
+ (void)close(sx.inblock.sock);
+ continue_transport = NULL;
+ continue_hostname = NULL;
+ return yield;
+ }
+ else if (pid == 0) /* child */
+ {
+ smtp_proxy_tls(&sx, pfd[0], sx.ob->command_timeout);
+ exim_exit(0);
+ }
+ }
+ }
}
/* If RSET failed and there are addresses left, they get deferred. */
-
- else set_errno(first_addr, errno, msg, DEFER, FALSE, host
+ else
+ set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host
#ifdef EXPERIMENTAL_DSN_INFO
- , smtp_greeting, helo_response
+ , sx.smtp_greeting, sx.helo_response
#endif
);
}
operation, the old commented-out code was removed on 17-Sep-99. */
SEND_QUIT:
-if (lflags.send_quit) (void)smtp_write_command(&outblock, FALSE, "QUIT\r\n");
+if (sx.send_quit) (void)smtp_write_command(&sx.outblock, FALSE, "QUIT\r\n");
END_OFF:
specified in the transports, and therefore not visible at top level, in which
case continue_more won't get set. */
-HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n");
-(void)close(inblock.sock);
+HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
+if (sx.send_quit)
+ {
+ shutdown(sx.outblock.sock, SHUT_WR);
+ if (fcntl(sx.inblock.sock, F_SETFL, O_NONBLOCK) == 0)
+ for (rc = 16; read(sx.inblock.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;)
+ rc--; /* drain socket */
+ }
+(void)close(sx.inblock.sock);
#ifndef DISABLE_EVENT
(void) event_raise(tblock->event_action, US"tcp:close", NULL);
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;
smtp_inblock inblock;
smtp_outblock outblock;
uschar buffer[256];
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;
{
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;
}
host_is_expired = retry_check_address(addrlist->domain, host, pistring,
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" :
{
case hwhy_retry: hosts_retry++; break;
case hwhy_failed: hosts_fail++; break;
+ case hwhy_insecure:
case hwhy_deferred: hosts_defer++; break;
}
&& 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, thost, host_af, port, interface, tblock,
&message_defer, TRUE);
git://git.exim.org / users / jgh / exim.git / blobdiff