-/* $Cambridge: exim/src/src/receive.c,v 1.42 2007/09/28 12:21:57 tom Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2007 */
+/* Copyright (c) University of Cambridge 1995 - 2014 */
/* See the file NOTICE for conditions of use and distribution. */
/* Code for receiving a message and setting up spool files. */
#include "exim.h"
-#if (defined EXPERIMENTAL_DOMAINKEYS) && (defined EXPERIMENTAL_DKIM)
-
-#warning Chaining Domainkeys via DKIM receive functions
-#define RECEIVE_GETC dkim_receive_getc
-#define RECEIVE_UNGETC dkim_receive_ungetc
-
-#else
-
-#if (defined EXPERIMENTAL_DOMAINKEYS) || (defined EXPERIMENTAL_DKIM)
-
-#ifdef EXPERIMENTAL_DOMAINKEYS
-#warning Using Domainkeys receive functions
-#define RECEIVE_GETC dk_receive_getc
-#define RECEIVE_UNGETC dk_receive_ungetc
-#endif
-#ifdef EXPERIMENTAL_DKIM
-#warning Using DKIM receive functions
-#define RECEIVE_GETC dkim_receive_getc
-#define RECEIVE_UNGETC dkim_receive_ungetc
-#endif
-
-#else
-
-/* Normal operation */
-#define RECEIVE_GETC receive_getc
-#define RECEIVE_UNGETC receive_ungetc
-
-#endif
-
+#ifdef EXPERIMENTAL_DCC
+extern int dcc_ok;
#endif
+#ifdef EXPERIMENTAL_DMARC
+# include "dmarc.h"
+#endif /* EXPERIMENTAL_DMARC */
/*************************************************
* Local static variables *
void
receive_bomb_out(uschar *reason, uschar *msg)
{
+ static BOOL already_bombing_out;
+/* The smtp_notquit_exit() below can call ACLs which can trigger recursive
+timeouts, if someone has something slow in their quit ACL. Since the only
+things we should be doing are to close down cleanly ASAP, on the second
+pass we also close down stuff that might be opened again, before bypassing
+the ACL call and exiting. */
+
/* If spool_name is set, it contains the name of the data file that is being
written. Unlink it before closing so that it cannot be picked up by a delivery
process. Ensure that any header file is also removed. */
-if (spool_name[0] != 0)
+if (spool_name[0] != '\0')
{
Uunlink(spool_name);
spool_name[Ustrlen(spool_name) - 1] = 'H';
Uunlink(spool_name);
+ spool_name[0] = '\0';
}
/* Now close the file if it is open, either as a fd or a stream. */
-if (data_file != NULL) (void)fclose(data_file);
- else if (data_fd >= 0) (void)close(data_fd);
+if (data_file != NULL)
+ {
+ (void)fclose(data_file);
+ data_file = NULL;
+} else if (data_fd >= 0) {
+ (void)close(data_fd);
+ data_fd = -1;
+ }
/* Attempt to close down an SMTP connection tidily. For non-batched SMTP, call
smtp_notquit_exit(), which runs the NOTQUIT ACL, if present, and handles the
SMTP response. */
-if (smtp_input)
+if (!already_bombing_out)
{
- if (smtp_batched_input)
- moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */
- smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.",
- smtp_active_hostname, msg);
+ already_bombing_out = TRUE;
+ if (smtp_input)
+ {
+ if (smtp_batched_input)
+ moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */
+ smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.",
+ smtp_active_hostname, msg);
+ }
}
/* Exit from the program (non-BSMTP cases) */
/* reset optin string pointer for next recipient */
bmi_current_optin = NULL;
#endif
+#ifdef EXPERIMENTAL_DSN
+recipients_list[recipients_count].orcpt = NULL;
+recipients_list[recipients_count].dsn_flags = 0;
+#endif
recipients_list[recipients_count++].errors_to = NULL;
}
+/*************************************************
+* Send user response message *
+*************************************************/
+
+/* This function is passed a default response code and a user message. It calls
+smtp_message_code() to check and possibly modify the response code, and then
+calls smtp_respond() to transmit the response. I put this into a function
+just to avoid a lot of repetition.
+
+Arguments:
+ code the response code
+ user_msg the user message
+
+Returns: nothing
+*/
+
+#ifndef DISABLE_PRDR
+static void
+smtp_user_msg(uschar *code, uschar *user_msg)
+{
+int len = 3;
+smtp_message_code(&code, &len, &user_msg, NULL);
+smtp_respond(code, len, TRUE, user_msg);
+}
+#endif
+
+
+
+
+
/*************************************************
* Remove a recipient from the list *
*************************************************/
{
register int last_ch = '\n';
- for (; (ch = (RECEIVE_GETC)()) != EOF; last_ch = ch)
+ for (; (ch = (receive_getc)()) != EOF; last_ch = ch)
{
if (ch == 0) body_zerocount++;
if (last_ch == '\r' && ch != '\n')
ch_state = 1;
-while ((ch = (RECEIVE_GETC)()) != EOF)
+while ((ch = (receive_getc)()) != EOF)
{
if (ch == 0) body_zerocount++;
switch (ch_state)
case 1: /* After written "\n" */
if (ch == '.') { ch_state = 3; continue; }
+ if (ch == '\r') { ch_state = 2; continue; }
if (ch != '\n') ch_state = 0; else linelength = -1;
break;
read_message_data_smtp(FILE *fout)
{
int ch_state = 0;
-register int ch;
+int ch;
register int linelength = 0;
-while ((ch = (RECEIVE_GETC)()) != EOF)
+while ((ch = (receive_getc)()) != EOF)
{
if (ch == 0) body_zerocount++;
switch (ch_state)
{
message_size++;
if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR;
+ (void) cutthrough_put_nl();
if (ch != '\r') ch_state = 1; else continue;
}
break;
message_size++;
body_linecount++;
if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR;
+ (void) cutthrough_put_nl();
if (ch == '\r')
{
ch_state = 2;
if (fputc(ch, fout) == EOF) return END_WERROR;
if (message_size > thismessage_size_limit) return END_SIZE;
}
+ if(ch == '\n')
+ (void) cutthrough_put_nl();
+ else
+ {
+ uschar c= ch;
+ (void) cutthrough_puts(&c, 1);
+ }
}
/* Fall through here if EOF encountered. This indicates some kind of error,
*/
static void
-add_acl_headers(uschar *acl_name)
+add_acl_headers(int where, uschar *acl_name)
{
header_line *h, *next;
header_line *last_received = NULL;
+switch(where)
+ {
+ case ACL_WHERE_DKIM:
+ case ACL_WHERE_MIME:
+ case ACL_WHERE_DATA:
+ if (cutthrough_fd >= 0 && (acl_removed_headers || acl_added_headers))
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC, "Header modification in data ACLs"
+ " will not take effect on cutthrough deliveries");
+ return;
+ }
+ }
+
+if (acl_removed_headers != NULL)
+ {
+ DEBUG(D_receive|D_acl) debug_printf(">>Headers removed by %s ACL:\n", acl_name);
+
+ for (h = header_list; h != NULL; h = h->next) if (h->type != htype_old)
+ {
+ uschar * list = acl_removed_headers;
+ int sep = ':'; /* This is specified as a colon-separated list */
+ uschar *s;
+ uschar buffer[128];
+
+ while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
+ if (header_testname(h, s, Ustrlen(s), FALSE))
+ {
+ h->type = htype_old;
+ DEBUG(D_receive|D_acl) debug_printf(" %s", h->text);
+ }
+ }
+ acl_removed_headers = NULL;
+ DEBUG(D_receive|D_acl) debug_printf(">>\n");
+ }
+
if (acl_added_headers == NULL) return;
DEBUG(D_receive|D_acl) debug_printf(">>Headers added by %s ACL:\n", acl_name);
header_line *my_headerlist;
uschar *user_msg, *log_msg;
int mime_part_count_buffer = -1;
-int rc;
+int rc = OK;
memset(CS rfc822_file_path,0,2048);
DO_MIME_ACL:
/* make sure the eml mbox file is spooled up */
-mbox_file = spool_mbox(&mbox_size);
+mbox_file = spool_mbox(&mbox_size, NULL);
if (mbox_file == NULL) {
/* error while spooling */
log_write(0, LOG_MAIN|LOG_PANIC,
"acl_smtp_mime: error while creating mbox spool file, message temporarily rejected.");
Uunlink(spool_name);
unspool_mbox();
+#ifdef EXPERIMENTAL_DCC
+ dcc_ok = 0;
+#endif
smtp_respond(US"451", 3, TRUE, US"temporary local problem");
message_id[0] = 0; /* Indicate no message accepted */
*smtp_reply_ptr = US""; /* Indicate reply already sent */
if (rc == OK)
{
uschar temp_path[1024];
- int n;
struct dirent *entry;
DIR *tempdir;
message_id);
tempdir = opendir(CS temp_path);
- n = 0;
do
{
entry = readdir(tempdir);
}
END_MIME_ACL:
-add_acl_headers(US"MIME");
+add_acl_headers(ACL_WHERE_MIME, US"MIME");
if (rc == DISCARD)
{
recipients_count = 0;
{
Uunlink(spool_name);
unspool_mbox();
- if (smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0)
+#ifdef EXPERIMENTAL_DCC
+ dcc_ok = 0;
+#endif
+ if (smtp_input && smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0) {
*smtp_yield_ptr = FALSE; /* No more messsages after dropped connection */
- *smtp_reply_ptr = US""; /* Indicate reply already sent */
+ *smtp_reply_ptr = US""; /* Indicate reply already sent */
+ }
message_id[0] = 0; /* Indicate no message accepted */
return FALSE; /* Cause skip to end of receive function */
}
#endif /* WITH_CONTENT_SCAN */
+
+void
+received_header_gen(void)
+{
+uschar *received;
+uschar *timestamp;
+header_line *received_header= header_list;
+
+timestamp = expand_string(US"${tod_full}");
+if (recipients_count == 1) received_for = recipients_list[0].address;
+received = expand_string(received_header_text);
+received_for = NULL;
+
+if (received == NULL)
+ {
+ if(spool_name[0] != 0)
+ Uunlink(spool_name); /* Lose the data file */
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" "
+ "(received_header_text) failed: %s", string_printing(received_header_text),
+ expand_string_message);
+ }
+
+/* The first element on the header chain is reserved for the Received header,
+so all we have to do is fill in the text pointer, and set the type. However, if
+the result of the expansion is an empty string, we leave the header marked as
+"old" so as to refrain from adding a Received header. */
+
+if (received[0] == 0)
+ {
+ received_header->text = string_sprintf("Received: ; %s\n", timestamp);
+ received_header->type = htype_old;
+ }
+else
+ {
+ received_header->text = string_sprintf("%s; %s\n", received, timestamp);
+ received_header->type = htype_received;
+ }
+
+received_header->slen = Ustrlen(received_header->text);
+
+DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s",
+ received_header->type, received_header->text);
+}
+
+
+
/*************************************************
* Receive message *
*************************************************/
both. The flag sender_local is true for locally generated messages. The flag
submission_mode is true if an ACL has obeyed "control = submission". The flag
suppress_local_fixups is true if an ACL has obeyed "control =
-suppress_local_fixups". The flag smtp_input is true if the message is to be
+suppress_local_fixups" or -G was passed on the command-line.
+The flag smtp_input is true if the message is to be
handled using SMTP conventions about termination and lines starting with dots.
For non-SMTP messages, dot_ends is true for dot-terminated messages.
BOOL
receive_msg(BOOL extract_recip)
{
-int i, rc;
+int i;
+int rc = FAIL;
int msg_size = 0;
int process_info_len = Ustrlen(process_info);
int error_rc = (error_handling == ERRORS_SENDER)?
uschar *resent_prefix = US"";
uschar *blackholed_by = NULL;
uschar *blackhole_log_msg = US"";
+enum {NOT_TRIED, TMP_REJ, PERM_REJ, ACCEPTED} cutthrough_done = NOT_TRIED;
flock_t lock_data;
error_block *bad_addresses = NULL;
header_line *msgid_header = NULL;
header_line *received_header;
+#ifdef EXPERIMENTAL_DMARC
+int dmarc_up = 0;
+#endif /* EXPERIMENTAL_DMARC */
+
/* Variables for use when building the Received: header. */
-uschar *received;
uschar *timestamp;
int tslen;
search_tidyup();
+/* Extracting the recipient list from an input file is incompatible with
+cutthrough delivery with the no-spool option. It shouldn't be possible
+to set up the combination, but just in case kill any ongoing connection. */
+if (extract_recip || !smtp_input)
+ cancel_cutthrough_connection("not smtp input");
+
/* Initialize the chain of headers by setting up a place-holder for Received:
header. Temporarily mark it as "old", i.e. not to be used. We keep header_last
pointing to the end of the chain to make adding headers simple. */
message_linecount = body_linecount = body_zerocount =
max_received_linelength = 0;
-#ifdef EXPERIMENTAL_DOMAINKEYS
-/* Call into DK to set up the context. Check if DK is to be run are carried out
- inside dk_exim_verify_init(). */
-dk_exim_verify_init();
-#endif
-#ifdef EXPERIMENTAL_DKIM
-/* Call into DKIM to set up the context. Check if DKIM is to be run are carried out
- inside dk_exim_verify_init(). */
-dkim_exim_verify_init();
+#ifndef DISABLE_DKIM
+/* Call into DKIM to set up the context. */
+if (smtp_input && !smtp_batched_input && !dkim_disable_verify) dkim_exim_verify_init();
#endif
+#ifdef EXPERIMENTAL_DMARC
+/* initialize libopendmarc */
+dmarc_up = dmarc_init();
+#endif
/* Remember the time of reception. Exim uses time+pid for uniqueness of message
ids, and fractions of a second are required. See the comments that precede the
for (;;)
{
- int ch = (RECEIVE_GETC)();
+ int ch = (receive_getc)();
/* If we hit EOF on a SMTP connection, it's an error, since incoming
SMTP must have a correct "." terminator. */
if (ch == '\n')
{
if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = FALSE;
- else if (first_line_ended_crlf) RECEIVE_UNGETC(' ');
+ else if (first_line_ended_crlf) receive_ungetc(' ');
goto EOL;
}
if (ptr == 0 && ch == '.' && (smtp_input || dot_ends))
{
- ch = (RECEIVE_GETC)();
+ ch = (receive_getc)();
if (ch == '\r')
{
- ch = (RECEIVE_GETC)();
+ ch = (receive_getc)();
if (ch != '\n')
{
- RECEIVE_UNGETC(ch);
+ receive_ungetc(ch);
ch = '\r'; /* Revert to CR */
}
}
if (ch == '\r')
{
- ch = (RECEIVE_GETC)();
+ ch = (receive_getc)();
if (ch == '\n')
{
if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = TRUE;
/* Otherwise, put back the character after CR, and turn the bare CR
into LF SP. */
- ch = (RECEIVE_UNGETC)(ch);
+ ch = (receive_ungetc)(ch);
next->text[ptr++] = '\n';
message_size++;
ch = ' ';
if (ch != EOF)
{
- int nextch = (RECEIVE_GETC)();
+ int nextch = (receive_getc)();
if (nextch == ' ' || nextch == '\t')
{
next->text[ptr++] = nextch;
message_size++;
continue; /* Iterate the loop */
}
- else if (nextch != EOF) (RECEIVE_UNGETC)(nextch); /* For next time */
+ else if (nextch != EOF) (receive_ungetc)(nextch); /* For next time */
else ch = EOF; /* Cause main loop to exit at end */
}
/* Record whether a Date: or Resent-Date: header exists, as appropriate. */
case htype_date:
- date_header_exists = !resents_exist || is_resent;
+ if (!resents_exist || is_resent) date_header_exists = TRUE;
break;
/* Same comments as about Return-Path: below. */
from_header = h;
if (!smtp_input)
{
+ int len;
uschar *s = Ustrchr(h->text, ':') + 1;
while (isspace(*s)) s++;
- if (strncmpic(s, originator_login, h->slen - (s - h->text) - 1) == 0)
+ len = h->slen - (s - h->text) - 1;
+ if (Ustrlen(originator_login) == len &&
+ strncmpic(s, originator_login, len) == 0)
{
uschar *name = is_resent? US"Resent-From" : US"From";
header_add(htype_from, "%s: %s <%s@%s>\n", name, originator_name,
}
}
- /* Add the header line */
+ /* Add the header line
+ * Resent-* headers are prepended, per RFC 5322 3.6.6. Non-Resent-* are
+ * appended, to preserve classical expectations of header ordering. */
- header_add(htype_id, "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix,
- message_id_external, (*id_text == 0)? "" : ".", id_text, id_domain);
+ header_add_at_position(!resents_exist, NULL, FALSE, htype_id,
+ "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix, message_id_external,
+ (*id_text == 0)? "" : ".", id_text, id_domain);
}
/* If we are to log recipients, keep a copy of the raw ones before any possible
if (sender_address_unrewritten == NULL)
sender_address_unrewritten = sender_address;
sender_address = generated_sender_address;
- log_write(L_address_rewrite, LOG_MAIN,
- "\"%s\" from env-from rewritten as \"%s\" by submission mode",
- sender_address_unrewritten, generated_sender_address);
+ if (Ustrcmp(sender_address_unrewritten, generated_sender_address) != 0)
+ log_write(L_address_rewrite, LOG_MAIN,
+ "\"%s\" from env-from rewritten as \"%s\" by submission mode",
+ sender_address_unrewritten, generated_sender_address);
}
}
-
/* If there are any rewriting rules, apply them to the sender address, unless
it has already been rewritten as part of verification for SMTP input. */
/* If there is no date header, generate one if the message originates locally
(i.e. not over TCP/IP) and suppress_local_fixups is not set, or if the
submission mode flag is set. Messages without Date: are not valid, but it seems
-to be more confusing if Exim adds one to all remotely-originated messages. */
+to be more confusing if Exim adds one to all remotely-originated messages.
+As per Message-Id, we prepend if resending, else append.
+*/
if (!date_header_exists &&
((sender_host_address == NULL && !suppress_local_fixups)
|| submission_mode))
- header_add(htype_other, "%sDate: %s\n", resent_prefix, tod_stamp(tod_full));
+ header_add_at_position(!resents_exist, NULL, FALSE, htype_other,
+ "%sDate: %s\n", resent_prefix, tod_stamp(tod_full));
search_tidyup(); /* Free any cached resources */
return message_ended == END_DOT;
}
+/* Cutthrough delivery:
+ We have to create the Received header now rather than at the end of reception,
+ so the timestamp behaviour is a change to the normal case.
+ XXX Ensure this gets documented XXX.
+ Having created it, send the headers to the destination.
+*/
+if (cutthrough_fd >= 0)
+ {
+ if (received_count > received_headers_max)
+ {
+ cancel_cutthrough_connection("too many headers");
+ if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */
+ log_write(0, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: "
+ "Too many \"Received\" headers",
+ sender_address,
+ (sender_fullhost == NULL)? "" : " H=",
+ (sender_fullhost == NULL)? US"" : sender_fullhost,
+ (sender_ident == NULL)? "" : " U=",
+ (sender_ident == NULL)? US"" : sender_ident);
+ message_id[0] = 0; /* Indicate no message accepted */
+ smtp_reply = US"550 Too many \"Received\" headers - suspected mail loop";
+ goto TIDYUP; /* Skip to end of function */
+ }
+ received_header_gen();
+ add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT");
+ (void) cutthrough_headers_send();
+ }
+
+
/* Open a new spool file for the data portion of the message. We need
to access it both via a file descriptor and a stream. Try to make the
directory if it isn't there. Note re use of sprintf: spool_directory
/* Make sure the file's group is the Exim gid, and double-check the mode
because the group setting doesn't always get set automatically. */
-(void)fchown(data_fd, exim_uid, exim_gid);
+if (fchown(data_fd, exim_uid, exim_gid))
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE,
+ "Failed setting ownership on spool file %s: %s",
+ spool_name, strerror(errno));
(void)fchmod(data_fd, SPOOL_MODE);
/* We now have data file open. Build a stream for it and lock it. We lock only
{
uschar *s = next->text;
int len = next->slen;
- (void)fwrite(s, 1, len, data_file);
+ len = fwrite(s, 1, len, data_file); len = len; /* compiler quietening */
body_linecount++; /* Assumes only 1 line */
}
if (smtp_input && message_ended == END_EOF)
{
Uunlink(spool_name); /* Lose data file when closed */
+ cancel_cutthrough_connection("sender closed connection");
message_id[0] = 0; /* Indicate no message accepted */
smtp_reply = handle_lost_connection(US"");
smtp_yield = FALSE;
if (message_ended == END_SIZE)
{
Uunlink(spool_name); /* Lose the data file when closed */
+ cancel_cutthrough_connection("mail too big");
if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */
log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: "
log_write(0, LOG_MAIN, "Message abandoned: %s", msg);
Uunlink(spool_name); /* Lose the data file */
+ cancel_cutthrough_connection("error writing spoolfile");
if (smtp_input)
{
Note: the checking for too many Received: headers is handled by the delivery
code. */
+/*XXX eventually add excess Received: check for cutthrough case back when classifying them */
-timestamp = expand_string(US"${tod_full}");
-if (recipients_count == 1) received_for = recipients_list[0].address;
-received = expand_string(received_header_text);
-received_for = NULL;
-
-if (received == NULL)
- {
- Uunlink(spool_name); /* Lose the data file */
- log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" "
- "(received_header_text) failed: %s", string_printing(received_header_text),
- expand_string_message);
- }
-
-/* The first element on the header chain is reserved for the Received header,
-so all we have to do is fill in the text pointer, and set the type. However, if
-the result of the expansion is an empty string, we leave the header marked as
-"old" so as to refrain from adding a Received header. */
-
-if (received[0] == 0)
- {
- received_header->text = string_sprintf("Received: ; %s\n", timestamp);
- received_header->type = htype_old;
- }
-else
+if (received_header->text == NULL) /* Non-cutthrough case */
{
- received_header->text = string_sprintf("%s; %s\n", received, timestamp);
- received_header->type = htype_received;
- }
+ received_header_gen();
-received_header->slen = Ustrlen(received_header->text);
+ /* Set the value of message_body_size for the DATA ACL and for local_scan() */
-DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s",
- received_header->type, received_header->text);
+ message_body_size = (fstat(data_fd, &statbuf) == 0)?
+ statbuf.st_size - SPOOL_DATA_START_OFFSET : -1;
-/* Set the value of message_body_size for the DATA ACL and for local_scan() */
+ /* If an ACL from any RCPT commands set up any warning headers to add, do so
+ now, before running the DATA ACL. */
-message_body_size = (fstat(data_fd, &statbuf) == 0)?
- statbuf.st_size - SPOOL_DATA_START_OFFSET : -1;
-
-/* If an ACL from any RCPT commands set up any warning headers to add, do so
-now, before running the DATA ACL. */
-
-add_acl_headers(US"MAIL or RCPT");
+ add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT");
+ }
+else
+ message_body_size = (fstat(data_fd, &statbuf) == 0)?
+ statbuf.st_size - SPOOL_DATA_START_OFFSET : -1;
/* If an ACL is specified for checking things at this stage of reception of a
message, run it, unless all the recipients were removed by "discard" in earlier
if (smtp_input && !smtp_batched_input)
{
-#ifdef EXPERIMENTAL_DOMAINKEYS
- dk_exim_verify_finish();
-#endif
-#ifdef EXPERIMENTAL_DKIM
- dkim_exim_verify_finish();
-#endif
+#ifndef DISABLE_DKIM
+ if (!dkim_disable_verify)
+ {
+ /* Finish verification, this will log individual signature results to
+ the mainlog */
+ dkim_exim_verify_finish();
+
+ /* Check if we must run the DKIM ACL */
+ if ((acl_smtp_dkim != NULL) &&
+ (dkim_verify_signers != NULL) &&
+ (dkim_verify_signers[0] != '\0'))
+ {
+ uschar *dkim_verify_signers_expanded =
+ expand_string(dkim_verify_signers);
+ if (dkim_verify_signers_expanded == NULL)
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "expansion of dkim_verify_signers option failed: %s",
+ expand_string_message);
+ }
+ else
+ {
+ int sep = 0;
+ uschar *ptr = dkim_verify_signers_expanded;
+ uschar *item = NULL;
+ uschar *seen_items = NULL;
+ int seen_items_size = 0;
+ int seen_items_offset = 0;
+ uschar itembuf[256];
+ /* Default to OK when no items are present */
+ rc = OK;
+ while ((item = string_nextinlist(&ptr, &sep,
+ itembuf,
+ sizeof(itembuf))) != NULL)
+ {
+ /* Prevent running ACL for an empty item */
+ if (!item || (item[0] == '\0')) continue;
+ /* Only run ACL once for each domain or identity, no matter how often it
+ appears in the expanded list. */
+ if (seen_items != NULL)
+ {
+ uschar *seen_item = NULL;
+ uschar seen_item_buf[256];
+ uschar *seen_items_list = seen_items;
+ int seen_this_item = 0;
+
+ while ((seen_item = string_nextinlist(&seen_items_list, &sep,
+ seen_item_buf,
+ sizeof(seen_item_buf))) != NULL)
+ {
+ if (Ustrcmp(seen_item,item) == 0)
+ {
+ seen_this_item = 1;
+ break;
+ }
+ }
+
+ if (seen_this_item > 0)
+ {
+ DEBUG(D_receive)
+ debug_printf("acl_smtp_dkim: skipping signer %s, already seen\n", item);
+ continue;
+ }
+
+ seen_items = string_append(seen_items,&seen_items_size,&seen_items_offset,1,":");
+ }
+
+ seen_items = string_append(seen_items,&seen_items_size,&seen_items_offset,1,item);
+ seen_items[seen_items_offset] = '\0';
+
+ DEBUG(D_receive)
+ debug_printf("calling acl_smtp_dkim for dkim_cur_signer=%s\n", item);
+
+ dkim_exim_acl_setup(item);
+ rc = acl_check(ACL_WHERE_DKIM, NULL, acl_smtp_dkim, &user_msg, &log_msg);
+
+ if (rc != OK)
+ {
+ DEBUG(D_receive)
+ debug_printf("acl_smtp_dkim: acl_check returned %d on %s, skipping remaining items\n", rc, item);
+ cancel_cutthrough_connection("dkim acl not ok");
+ break;
+ }
+ }
+ add_acl_headers(ACL_WHERE_DKIM, US"DKIM");
+ if (rc == DISCARD)
+ {
+ recipients_count = 0;
+ blackholed_by = US"DKIM ACL";
+ if (log_msg != NULL)
+ blackhole_log_msg = string_sprintf(": %s", log_msg);
+ }
+ else if (rc != OK)
+ {
+ Uunlink(spool_name);
+ if (smtp_handle_acl_fail(ACL_WHERE_DKIM, rc, user_msg, log_msg) != 0)
+ smtp_yield = FALSE; /* No more messsages after dropped connection */
+ smtp_reply = US""; /* Indicate reply already sent */
+ message_id[0] = 0; /* Indicate no message accepted */
+ goto TIDYUP; /* Skip to end of function */
+ }
+ }
+ }
+ }
+#endif /* DISABLE_DKIM */
#ifdef WITH_CONTENT_SCAN
- if (acl_smtp_mime != NULL &&
+ if (recipients_count > 0 &&
+ acl_smtp_mime != NULL &&
!run_mime_acl(acl_smtp_mime, &smtp_yield, &smtp_reply, &blackholed_by))
goto TIDYUP;
#endif /* WITH_CONTENT_SCAN */
+#ifdef EXPERIMENTAL_DMARC
+ dmarc_up = dmarc_store_data(from_header);
+#endif /* EXPERIMENTAL_DMARC */
+
+#ifndef DISABLE_PRDR
+ if (prdr_requested && recipients_count > 1 && acl_smtp_data_prdr)
+ {
+ unsigned int c;
+ int all_pass = OK;
+ int all_fail = FAIL;
+
+ smtp_printf("353 PRDR content analysis beginning\r\n");
+ /* Loop through recipients, responses must be in same order received */
+ for (c = 0; recipients_count > c; c++)
+ {
+ uschar * addr= recipients_list[c].address;
+ uschar * msg= US"PRDR R=<%s> %s";
+ uschar * code;
+ DEBUG(D_receive)
+ debug_printf("PRDR processing recipient %s (%d of %d)\n",
+ addr, c+1, recipients_count);
+ rc = acl_check(ACL_WHERE_PRDR, addr,
+ acl_smtp_data_prdr, &user_msg, &log_msg);
+
+ /* If any recipient rejected content, indicate it in final message */
+ all_pass |= rc;
+ /* If all recipients rejected, indicate in final message */
+ all_fail &= rc;
+
+ switch (rc)
+ {
+ case OK: case DISCARD: code = US"250"; break;
+ case DEFER: code = US"450"; break;
+ default: code = US"550"; break;
+ }
+ if (user_msg != NULL)
+ smtp_user_msg(code, user_msg);
+ else
+ {
+ switch (rc)
+ {
+ case OK: case DISCARD:
+ msg = string_sprintf(CS msg, addr, "acceptance"); break;
+ case DEFER:
+ msg = string_sprintf(CS msg, addr, "temporary refusal"); break;
+ default:
+ msg = string_sprintf(CS msg, addr, "refusal"); break;
+ }
+ smtp_user_msg(code, msg);
+ }
+ if (log_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, log_msg);
+ else if (user_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, user_msg);
+ else log_write(0, LOG_MAIN, "%s", CS msg);
+
+ if (rc != OK) { receive_remove_recipient(addr); c--; }
+ }
+ /* Set up final message, used if data acl gives OK */
+ smtp_reply = string_sprintf("%s id=%s message %s",
+ all_fail == FAIL ? US"550" : US"250",
+ message_id,
+ all_fail == FAIL
+ ? US"rejected for all recipients"
+ : all_pass == OK
+ ? US"accepted"
+ : US"accepted for some recipients");
+ if (recipients_count == 0)
+ {
+ message_id[0] = 0; /* Indicate no message accepted */
+ goto TIDYUP;
+ }
+ }
+ else
+ prdr_requested = FALSE;
+#endif /* !DISABLE_PRDR */
+
/* Check the recipients count again, as the MIME ACL might have changed
them. */
if (acl_smtp_data != NULL && recipients_count > 0)
{
rc = acl_check(ACL_WHERE_DATA, NULL, acl_smtp_data, &user_msg, &log_msg);
- add_acl_headers(US"DATA");
+ add_acl_headers(ACL_WHERE_DATA, US"DATA");
if (rc == DISCARD)
{
recipients_count = 0;
blackholed_by = US"DATA ACL";
if (log_msg != NULL)
blackhole_log_msg = string_sprintf(": %s", log_msg);
+ cancel_cutthrough_connection("data acl discard");
}
else if (rc != OK)
{
Uunlink(spool_name);
+ cancel_cutthrough_connection("data acl not ok");
#ifdef WITH_CONTENT_SCAN
unspool_mbox();
+#endif
+#ifdef EXPERIMENTAL_DCC
+ dcc_ok = 0;
#endif
if (smtp_handle_acl_fail(ACL_WHERE_DATA, rc, user_msg, log_msg) != 0)
smtp_yield = FALSE; /* No more messsages after dropped connection */
Uunlink(spool_name);
#ifdef WITH_CONTENT_SCAN
unspool_mbox();
+#endif
+#ifdef EXPERIMENTAL_DCC
+ dcc_ok = 0;
#endif
/* The ACL can specify where rejections are to be logged, possibly
nowhere. The default is main and reject logs. */
/* Does not return */
}
}
- add_acl_headers(US"non-SMTP");
+ add_acl_headers(ACL_WHERE_NOTSMTP, US"non-SMTP");
}
}
unspool_mbox();
#endif
+#ifdef EXPERIMENTAL_DCC
+dcc_ok = 0;
+#endif
+
+
/* The final check on the message is to run the scan_local() function. The
version supplied with Exim always accepts, but this is a hook for sysadmins to
supply their own checking code. The local_scan() function is run even when all
signal(SIGTERM, SIG_IGN);
signal(SIGINT, SIG_IGN);
+
/* Ensure the first time flag is set in the newly-received message. */
deliver_firsttime = TRUE;
s = add_host_info_for_log(s, &size, &sptr);
#ifdef SUPPORT_TLS
-if ((log_extra_selector & LX_tls_cipher) != 0 && tls_cipher != NULL)
- s = string_append(s, &size, &sptr, 2, US" X=", tls_cipher);
-if ((log_extra_selector & LX_tls_certificate_verified) != 0 &&
- tls_cipher != NULL)
+if (log_extra_selector & LX_tls_cipher && tls_in.cipher)
+ s = string_append(s, &size, &sptr, 2, US" X=", tls_in.cipher);
+if (log_extra_selector & LX_tls_certificate_verified && tls_in.cipher)
s = string_append(s, &size, &sptr, 2, US" CV=",
- tls_certificate_verified? "yes":"no");
-if ((log_extra_selector & LX_tls_peerdn) != 0 && tls_peerdn != NULL)
+ tls_in.certificate_verified? "yes":"no");
+if (log_extra_selector & LX_tls_peerdn && tls_in.peerdn)
s = string_append(s, &size, &sptr, 3, US" DN=\"",
- string_printing(tls_peerdn), US"\"");
+ string_printing(tls_in.peerdn), US"\"");
+if (log_extra_selector & LX_tls_sni && tls_in.sni)
+ s = string_append(s, &size, &sptr, 3, US" SNI=\"",
+ string_printing(tls_in.sni), US"\"");
#endif
-if (sender_host_authenticated != NULL)
+if (sender_host_authenticated)
{
s = string_append(s, &size, &sptr, 2, US" A=", sender_host_authenticated);
if (authenticated_id != NULL)
+ {
s = string_append(s, &size, &sptr, 2, US":", authenticated_id);
+ if (log_extra_selector & LX_smtp_mailauth && authenticated_sender != NULL)
+ s = string_append(s, &size, &sptr, 2, US":", authenticated_sender);
+ }
}
+#ifndef DISABLE_PRDR
+if (prdr_requested)
+ s = string_append(s, &size, &sptr, 1, US" PRDR");
+#endif
+
+#ifdef EXPERIMENTAL_PROXY
+if (proxy_session && log_extra_selector & LX_proxy)
+ s = string_append(s, &size, &sptr, 2, US" PRX=", proxy_host_address);
+#endif
+
sprintf(CS big_buffer, "%d", msg_size);
s = string_append(s, &size, &sptr, 2, US" S=", big_buffer);
+/* log 8BITMIME mode announced in MAIL_FROM
+ 0 ... no BODY= used
+ 7 ... 7BIT
+ 8 ... 8BITMIME */
+if (log_extra_selector & LX_8bitmime)
+ {
+ sprintf(CS big_buffer, "%d", body_8bitmime);
+ s = string_append(s, &size, &sptr, 2, US" M8S=", big_buffer);
+ }
+
/* If an addr-spec in a message-id contains a quoted string, it can contain
any characters except " \ and CR and so in particular it can contain NL!
Therefore, make sure we use a printing-characters only version for the log.
/* Create a message log file if message logs are being used and this message is
not blackholed. Write the reception stuff to it. We used to leave message log
-creation until the first delivery, but this has proved confusing for somep
+creation until the first delivery, but this has proved confusing for some
people. */
if (message_logs && blackholed_by == NULL)
if (select(fileno(smtp_in) + 1, &select_check, NULL, NULL, &tv) != 0)
{
- int c = (RECEIVE_GETC)();
- if (c != EOF) (RECEIVE_UNGETC)(c); else
+ int c = (receive_getc)();
+ if (c != EOF) (receive_ungetc)(c); else
{
uschar *msg = US"SMTP connection lost after final dot";
smtp_reply = US""; /* No attempt to send a response */
/* The connection has not gone away; we really are going to take responsibility
for this message. */
-log_write(0, LOG_MAIN |
- (((log_extra_selector & LX_received_recipients) != 0)? LOG_RECIPIENTS : 0) |
- (((log_extra_selector & LX_received_sender) != 0)? LOG_SENDER : 0),
- "%s", s);
-receive_call_bombout = FALSE;
+/* Cutthrough - had sender last-dot; assume we've sent (or bufferred) all
+ data onward by now.
-/* Log any control actions taken by an ACL or local_scan(). */
+ Send dot onward. If accepted, wipe the spooled files, log as delivered and accept
+ the sender's dot (below).
+ If rejected: copy response to sender, wipe the spooled files, log approriately.
+ If temp-reject: accept to sender, keep the spooled files.
-if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by);
-if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN,
- "no immediate delivery: queued by %s", queued_by);
+ Having the normal spool files lets us do data-filtering, and store/forward on temp-reject.
+
+ XXX We do not handle queue-only, freezing, or blackholes.
+*/
+if(cutthrough_fd >= 0)
+ {
+ uschar * msg= cutthrough_finaldot(); /* Ask the target system to accept the messsage */
+ /* Logging was done in finaldot() */
+ switch(msg[0])
+ {
+ case '2': /* Accept. Do the same to the source; dump any spoolfiles. */
+ cutthrough_done = ACCEPTED;
+ break; /* message_id needed for SMTP accept below */
+
+ default: /* Unknown response, or error. Treat as temp-reject. */
+ case '4': /* Temp-reject. Keep spoolfiles and accept. */
+ cutthrough_done = TMP_REJ; /* Avoid the usual immediate delivery attempt */
+ break; /* message_id needed for SMTP accept below */
+
+ case '5': /* Perm-reject. Do the same to the source. Dump any spoolfiles */
+ smtp_reply= msg; /* Pass on the exact error */
+ cutthrough_done = PERM_REJ;
+ break;
+ }
+ }
+
+#ifndef DISABLE_PRDR
+if(!smtp_reply || prdr_requested)
+#else
+if(!smtp_reply)
+#endif
+ {
+ log_write(0, LOG_MAIN |
+ (((log_extra_selector & LX_received_recipients) != 0)? LOG_RECIPIENTS : 0) |
+ (((log_extra_selector & LX_received_sender) != 0)? LOG_SENDER : 0),
+ "%s", s);
+
+ /* Log any control actions taken by an ACL or local_scan(). */
+
+ if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by);
+ if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN,
+ "no immediate delivery: queued by %s", queued_by);
+ }
+receive_call_bombout = FALSE;
store_reset(s); /* The store for the main log message can be reused */
possible for fclose() to fail - but what to do? What has happened to the lock
if this happens? */
+
TIDYUP:
process_info[process_info_len] = 0; /* Remove message id */
if (data_file != NULL) (void)fclose(data_file); /* Frees the lock */
else
smtp_printf("%.1024s\r\n", smtp_reply);
}
+
+ switch (cutthrough_done)
+ {
+ case ACCEPTED: log_write(0, LOG_MAIN, "Completed");/* Delivery was done */
+ case PERM_REJ: { /* Delete spool files */
+ sprintf(CS spool_name, "%s/input/%s/%s-D", spool_directory,
+ message_subdir, message_id);
+ Uunlink(spool_name);
+ sprintf(CS spool_name, "%s/input/%s/%s-H", spool_directory,
+ message_subdir, message_id);
+ Uunlink(spool_name);
+ sprintf(CS spool_name, "%s/msglog/%s/%s", spool_directory,
+ message_subdir, message_id);
+ Uunlink(spool_name);
+ }
+ case TMP_REJ: message_id[0] = 0; /* Prevent a delivery from starting */
+ default:break;
+ }
+ cutthrough_delivery = FALSE;
}
/* For batched SMTP, generate an error message on failure, and do
git://git.exim.org / users / heiko / exim.git / blobdiff