* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2017 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for handling an incoming SMTP call. */
if (rc < 0) return TRUE; /* End of file or error */
smtp_ungetc(rc);
-rc = smtp_inend - smtp_inptr;
-if (rc > 150) rc = 150;
-smtp_inptr[rc] = 0;
return FALSE;
}
static BOOL
check_sync(void)
{
-if (!smtp_enforce_sync || sender_host_address == NULL || sender_host_notsocket)
+if (!smtp_enforce_sync || !sender_host_address || sender_host_notsocket)
return TRUE;
return wouldblock_reading();
+void
+smtp_command_timeout_exit(void)
+{
+log_write(L_lost_incoming_connection,
+ LOG_MAIN, "SMTP command timeout on%s connection from %s",
+ tls_in.active >= 0 ? " TLS" : "", host_and_ident(FALSE));
+if (smtp_batched_input)
+ moan_smtp_batch(NULL, "421 SMTP command timeout"); /* Does not return */
+smtp_notquit_exit(US"command-timeout", US"421",
+ US"%s: SMTP command timeout - closing connection",
+ smtp_active_hostname);
+exim_exit(EXIT_FAILURE, US"receiving");
+}
+
+void
+smtp_command_sigterm_exit(void)
+{
+log_write(0, LOG_MAIN, "%s closed after SIGTERM", smtp_get_connection_info());
+if (smtp_batched_input)
+ moan_smtp_batch(NULL, "421 SIGTERM received"); /* Does not return */
+smtp_notquit_exit(US"signal-exit", US"421",
+ US"%s: Service not available - closing connection", smtp_active_hostname);
+exim_exit(EXIT_FAILURE, US"receiving");
+}
+
+void
+smtp_data_timeout_exit(void)
+{
+log_write(L_lost_incoming_connection,
+ LOG_MAIN, "SMTP data timeout (message abandoned) on connection from %s F=<%s>",
+ sender_fullhost ? sender_fullhost : US"local process", sender_address);
+receive_bomb_out(US"data-timeout", US"SMTP incoming data timeout");
+/* Does not return */
+}
+
+void
+smtp_data_sigint_exit(void)
+{
+log_write(0, LOG_MAIN, "%s closed after %s",
+ smtp_get_connection_info(), had_data_sigint == SIGTERM ? "SIGTERM":"SIGINT");
+receive_bomb_out(US"signal-exit",
+ US"Service not available - SIGTERM or SIGINT received");
+/* Does not return */
+}
+
+
+
/* Refill the buffer, and notify DKIM verification code.
Return false for error or EOF.
*/
fflush(smtp_out);
if (smtp_receive_timeout > 0) alarm(smtp_receive_timeout);
-/* Limit amount read, so non-message data is not fed to DKIM */
+/* Limit amount read, so non-message data is not fed to DKIM.
+Take care to not touch the safety NUL at the end of the buffer. */
-rc = read(fileno(smtp_in), smtp_inbuffer, MIN(IN_BUFFER_SIZE, lim));
+rc = read(fileno(smtp_in), smtp_inbuffer, MIN(IN_BUFFER_SIZE-1, lim));
save_errno = errno;
-alarm(0);
+if (smtp_receive_timeout > 0) alarm(0);
if (rc <= 0)
{
/* Must put the error text in fixed store, because this might be during
header reading, where it releases unused store above the header. */
if (rc < 0)
{
+ if (had_command_timeout) /* set by signal handler */
+ smtp_command_timeout_exit(); /* does not return */
+ if (had_command_sigterm)
+ smtp_command_sigterm_exit();
+ if (had_data_timeout)
+ smtp_data_timeout_exit();
+ if (had_data_sigint)
+ smtp_data_sigint_exit();
+
smtp_had_error = save_errno;
smtp_read_error = string_copy_malloc(
string_sprintf(" (error: %s)", strerror(save_errno)));
}
- else smtp_had_eof = 1;
+ else
+ smtp_had_eof = 1;
return FALSE;
}
#ifndef DISABLE_DKIM
}
receive_getc = bdat_getc;
- receive_getbuf = bdat_getbuf;
+ receive_getbuf = bdat_getbuf; /* r~getbuf is never actually used */
receive_ungetc = bdat_ungetc;
#ifndef DISABLE_DKIM
dkim_collect_input = dkim_save;
while (chunking_data_left)
{
unsigned n = chunking_data_left;
- (void) bdat_getbuf(&n);
+ if (!bdat_getbuf(&n)) break;
}
receive_getc = lwr_receive_getc;
static void
command_timeout_handler(int sig)
{
-sig = sig; /* Keep picky compilers happy */
-log_write(L_lost_incoming_connection,
- LOG_MAIN, "SMTP command timeout on%s connection from %s",
- (tls_in.active >= 0)? " TLS" : "",
- host_and_ident(FALSE));
-if (smtp_batched_input)
- moan_smtp_batch(NULL, "421 SMTP command timeout"); /* Does not return */
-smtp_notquit_exit(US"command-timeout", US"421",
- US"%s: SMTP command timeout - closing connection", smtp_active_hostname);
-exim_exit(EXIT_FAILURE, US"receiving");
+had_command_timeout = sig;
}
static void
command_sigterm_handler(int sig)
{
-sig = sig; /* Keep picky compilers happy */
-log_write(0, LOG_MAIN, "%s closed after SIGTERM", smtp_get_connection_info());
-if (smtp_batched_input)
- moan_smtp_batch(NULL, "421 SIGTERM received"); /* Does not return */
-smtp_notquit_exit(US"signal-exit", US"421",
- US"%s: Service not available - closing connection", smtp_active_hostname);
-exim_exit(EXIT_FAILURE, US"receiving");
+had_command_sigterm = sig;
}
smtp_cmd_list *p;
BOOL hadnull = FALSE;
+had_command_timeout = 0;
os_non_restarting_signal(SIGALRM, command_timeout_handler);
while ((c = (receive_getc)(buffer_lim)) != '\n' && c != EOF)
/* Enforce synchronization for unknown commands */
-if (smtp_inptr < smtp_inend && /* Outstanding input */
- check_sync && /* Local flag set */
- smtp_enforce_sync && /* Global flag set */
- sender_host_address != NULL && /* Not local input */
- !sender_host_notsocket) /* Really is a socket */
+if ( smtp_inptr < smtp_inend /* Outstanding input */
+ && check_sync /* Local flag set */
+ && smtp_enforce_sync /* Global flag set */
+ && sender_host_address /* Not local input */
+ && !sender_host_notsocket) /* Really is a socket */
return BADSYN_CMD;
return OTHER_CMD;
/* Discard any previous helo name */
-if (sender_helo_name != NULL)
+if (sender_helo_name)
{
store_free(sender_helo_name);
sender_helo_name = NULL;
*************************************************/
/* This function is called whenever the SMTP session is reset from
-within either of the setup functions.
+within either of the setup functions; also from the daemon loop.
Argument: the stacking pool storage reset point
Returns: nothing
*/
-static void
+void
smtp_reset(void *reset_point)
{
recipients_list = NULL;
sending_ip_address = NULL;
return_path = sender_address = NULL;
sender_data = NULL; /* Can be set by ACL */
-deliver_localpart_orig = NULL;
-deliver_domain_orig = NULL;
+deliver_localpart_parent = deliver_localpart_orig = NULL;
+deliver_domain_parent = deliver_domain_orig = NULL;
callout_address = NULL;
submission_name = NULL; /* Can be set by ACL */
raw_sender = NULL; /* After SMTP rewrite, before qualifying */
#endif
dnslist_domain = dnslist_matched = NULL;
#ifndef DISABLE_DKIM
-dkim_signers = NULL;
-dkim_disable_verify = FALSE;
-dkim_collect_input = FALSE;
+dkim_cur_signer = dkim_signers =
+dkim_signing_domain = dkim_signing_selector = NULL;
+dkim_cur_signer = dkim_signers = dkim_signing_domain = dkim_signing_selector = NULL;
+dkim_disable_verify = dkim_collect_input = FALSE;
+dkim_verify_overall = dkim_verify_status = dkim_verify_reason = NULL;
+dkim_key_length = 0;
+dkim_verify_signers = US"$dkim_signers";
#endif
dsn_ret = 0;
dsn_envid = NULL;
#ifndef DISABLE_PRDR
prdr_requested = FALSE;
#endif
-#ifdef EXPERIMENTAL_SPF
-spf_header_comment = NULL;
-spf_received = NULL;
-spf_result = NULL;
-spf_smtp_comment = NULL;
+#ifdef SUPPORT_SPF
+spf_header_comment = spf_received = spf_result = spf_smtp_comment = NULL;
+spf_result_guessed = FALSE;
+#endif
+#ifdef EXPERIMENTAL_DMARC
+dmarc_has_been_checked = dmarc_disable_verify = dmarc_enable_forensic = FALSE;
+dmarc_domain_policy = dmarc_status = dmarc_status_text = dmarc_used_domain = NULL;
+#endif
+#ifdef EXPERIMENTAL_ARC
+arc_state = arc_state_reason = NULL;
#endif
#ifdef SUPPORT_I18N
message_smtputf8 = FALSE;
/* If receiving by -bs from a trusted user, or testing with -bh, we allow
authentication settings from -oMaa to remain in force. */
-if (!host_checking && !sender_host_notsocket) sender_host_authenticated = NULL;
+if (!host_checking && !sender_host_notsocket)
+ sender_host_auth_pubname = sender_host_authenticated = NULL;
authenticated_by = NULL;
#ifdef SUPPORT_TLS
(sender_host_address ? protocols : protocols_local) [pnormal];
/* Set up the buffer for inputting using direct read() calls, and arrange to
-call the local functions instead of the standard C ones. */
+call the local functions instead of the standard C ones. Place a NUL at the
+end of the buffer to safety-stop C-string reads from it. */
if (!(smtp_inbuffer = US malloc(IN_BUFFER_SIZE)))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malloc() failed for SMTP input buffer");
+smtp_inbuffer[IN_BUFFER_SIZE-1] = '\0';
receive_getc = smtp_getc;
receive_getbuf = smtp_getbuf;
/* This function is called when acl_check() fails. As well as calls from within
this module, it is called from receive.c for an ACL after DATA. It sorts out
-logging the incident, and sets up the error response. A message containing
+logging the incident, and sends the error response. A message containing
newlines is turned into a multiline SMTP response, but for logging, only the
first line is used.
HDEBUG(D_receive) debug_printf("getting IP address for %s\n",
sender_helo_name);
- rc = host_find_bydns(&h, NULL, HOST_FIND_BY_A,
+ rc = host_find_bydns(&h, NULL, HOST_FIND_BY_A | HOST_FIND_BY_AAAA,
NULL, NULL, NULL, &d, NULL, NULL);
if (rc == HOST_FOUND || rc == HOST_FOUND_LOCAL)
for (hh = &h; hh; hh = hh->next)
{
if (set_id) authenticated_id = string_copy_malloc(set_id);
sender_host_authenticated = au->name;
+ sender_host_auth_pubname = au->public_name;
authentication_failed = FALSE;
authenticated_fail_id = NULL; /* Impossible to already be set? */
smtp_printf("221 %s closing connection\r\n", FALSE, smtp_active_hostname);
#ifdef SUPPORT_TLS
-tls_close(TRUE, TRUE);
+tls_close(TRUE, TLS_SHUTDOWN_NOWAIT);
#endif
log_write(L_smtp_connection, LOG_MAIN, "%s closed by QUIT",
/* Set the local signal handler for SIGTERM - it tries to end off tidily */
+had_command_sigterm = 0;
os_non_restarting_signal(SIGTERM, command_sigterm_handler);
/* Batched SMTP is handled in a different function. */
/* Force a reverse lookup if HELO quoted something in helo_lookup_domains
because otherwise the log can be confusing. */
- if (sender_host_name == NULL &&
- (deliver_domain = sender_helo_name, /* set $domain */
- match_isinlist(sender_helo_name, CUSS &helo_lookup_domains, 0,
+ if ( !sender_host_name
+ && (deliver_domain = sender_helo_name, /* set $domain */
+ match_isinlist(sender_helo_name, CUSS &helo_lookup_domains, 0,
&domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) == OK)
(void)host_name_lookup();
}
}
-#ifdef EXPERIMENTAL_SPF
+#ifdef SUPPORT_SPF
/* set up SPF context */
spf_init(sender_helo_name, sender_host_address);
#endif
&user_msg, &log_msg)) != OK)
{
done = smtp_handle_acl_fail(ACL_WHERE_HELO, rc, user_msg, log_msg);
- sender_helo_name = NULL;
+ if (sender_helo_name)
+ {
+ store_free(sender_helo_name);
+ sender_helo_name = NULL;
+ }
host_build_sender_fullhost(); /* Rebuild */
break;
}
US"invalid data for AUTH");
goto COMMAND_LOOP;
}
- if (acl_smtp_mailauth == NULL)
+ if (!acl_smtp_mailauth)
{
ignore_msg = US"client not authenticated";
- rc = (sender_host_authenticated != NULL)? OK : FAIL;
+ rc = sender_host_authenticated ? OK : FAIL;
}
else
{
cmd_list[CMD_LIST_EHLO].is_mail_cmd = TRUE;
cmd_list[CMD_LIST_AUTH].is_mail_cmd = TRUE;
cmd_list[CMD_LIST_TLS_AUTH].is_mail_cmd = TRUE;
- if (sender_helo_name != NULL)
+ if (sender_helo_name)
{
store_free(sender_helo_name);
sender_helo_name = NULL;
+ (tls_in.active >= 0 ? pcrpted : 0)
];
- sender_host_authenticated = NULL;
+ sender_host_auth_pubname = sender_host_authenticated = NULL;
authenticated_id = NULL;
sync_cmd_limit = NON_SYNC_CMD_NON_PIPELINING;
DEBUG(D_tls) debug_printf("TLS active\n");
smtp_printf("554 Security failure\r\n", FALSE);
break;
}
- tls_close(TRUE, TRUE);
+ tls_close(TRUE, TLS_SHUTDOWN_NOWAIT);
break;
#endif
case ETRN_CMD:
HAD(SCH_ETRN);
- if (sender_address != NULL)
+ if (sender_address)
{
done = synprot_error(L_smtp_protocol_error, 503, NULL,
US"ETRN is not permitted inside a transaction");
since that is strictly the only kind of ETRN that can be implemented
according to the RFC. */
- if (smtp_etrn_command != NULL)
+ if (smtp_etrn_command)
{
uschar *error;
BOOL rc;
case BADCHAR_CMD:
done = synprot_error(L_smtp_syntax_error, 0, NULL, /* Just logs */
- US"NULL character(s) present (shown as '?')");
- smtp_printf("501 NULL characters are not allowed in SMTP commands\r\n", FALSE);
+ US"NUL character(s) present (shown as '?')");
+ smtp_printf("501 NUL characters are not allowed in SMTP commands\r\n", FALSE);
break;
if (smtp_inend >= smtp_inbuffer + IN_BUFFER_SIZE)
smtp_inend = smtp_inbuffer + IN_BUFFER_SIZE - 1;
c = smtp_inend - smtp_inptr;
- if (c > 150) c = 150;
+ if (c > 150) c = 150; /* limit logged amount */
smtp_inptr[c] = 0;
incomplete_transaction_log(US"sync failure");
log_write(0, LOG_MAIN|LOG_REJECT, "SMTP protocol synchronization error "
return done - 2; /* Convert yield values */
}
+
+
+gstring *
+authres_smtpauth(gstring * g)
+{
+if (!sender_host_authenticated)
+ return g;
+
+g = string_append(g, 2, US";\n\tauth=pass (", sender_host_auth_pubname);
+
+if (Ustrcmp(sender_host_auth_pubname, "tls") != 0)
+ g = string_append(g, 2, US") smtp.auth=", authenticated_id);
+else if (authenticated_id)
+ g = string_append(g, 2, US") x509.auth=", authenticated_id);
+else
+ g = string_catn(g, US") reason=x509.auth", 17);
+
+if (authenticated_sender)
+ g = string_append(g, 2, US" smtp.mailfrom=", authenticated_sender);
+return g;
+}
+
+
+
/* vi: aw ai sw=2
*/
/* End of smtp_in.c */
git://git.exim.org / exim.git / blobdiff