diff options
Diffstat (limited to 'src/cleanup/cleanup.c')
| -rw-r--r-- | src/cleanup/cleanup.c | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/src/cleanup/cleanup.c b/src/cleanup/cleanup.c new file mode 100644 index 0000000..6fe61f8 --- /dev/null +++ b/src/cleanup/cleanup.c @@ -0,0 +1,656 @@ +/*++ +/* NAME +/* cleanup 8 +/* SUMMARY +/* canonicalize and enqueue Postfix message +/* SYNOPSIS +/* \fBcleanup\fR [generic Postfix daemon options] +/* DESCRIPTION +/* The \fBcleanup\fR(8) daemon processes inbound mail, inserts it +/* into the \fBincoming\fR mail queue, and informs the queue +/* manager of its arrival. +/* +/* The \fBcleanup\fR(8) daemon performs the following transformations: +/* .IP \(bu +/* Insert missing message headers: (\fBResent-\fR) \fBFrom:\fR, +/* \fBTo:\fR, \fBMessage-Id:\fR, and \fBDate:\fR. +/* .br +/* This is enabled with the \fBlocal_header_rewrite_clients\fR and +/* \fBalways_add_missing_headers\fR parameter settings. +/* .IP \(bu +/* Transform envelope and header addresses to the standard +/* \fIuser@fully-qualified-domain\fR form that is expected by other +/* Postfix programs. +/* This task depends on the \fBtrivial-rewrite\fR(8) daemon. +/* .br +/* The header transformation is enabled with the +/* \fBlocal_header_rewrite_clients\fR parameter setting. +/* .IP \(bu +/* Eliminate duplicate envelope recipient addresses. +/* .br +/* This is enabled with the \fBduplicate_filter_limit\fR +/* parameter setting. +/* .IP \(bu +/* Remove message headers: \fBBcc\fR, \fBContent-Length\fR, +/* \fBResent-Bcc\fR, \fBReturn-Path\fR. +/* .br +/* This is enabled with the message_drop_headers parameter +/* setting. +/* .IP \(bu +/* Optionally, rewrite all envelope and header addresses according +/* to the mappings specified in the \fBcanonical\fR(5) lookup tables. +/* .br +/* The header transformation is enabled with the +/* \fBlocal_header_rewrite_clients\fR parameter setting. +/* .IP \(bu +/* Optionally, masquerade envelope sender addresses and message +/* header addresses (i.e. strip host or domain information below +/* all domains listed in the \fBmasquerade_domains\fR parameter, +/* except for user names listed in \fBmasquerade_exceptions\fR). +/* By default, address masquerading does not affect envelope recipients. +/* .br +/* The header transformation is enabled with the +/* \fBlocal_header_rewrite_clients\fR parameter setting. +/* .IP \(bu +/* Optionally, expand envelope recipients according to information +/* found in the \fBvirtual_alias_maps\fR lookup tables. +/* .PP +/* The \fBcleanup\fR(8) daemon performs sanity checks on the content of +/* each message. When it finds a problem, by default it returns a +/* diagnostic status to the cleanup service client, and leaves +/* it up to the client +/* to deal with the problem. Alternatively, the client can request +/* the \fBcleanup\fR(8) daemon to bounce the message back to the sender +/* in case of trouble. +/* STANDARDS +/* RFC 822 (ARPA Internet Text Messages) +/* RFC 2045 (MIME: Format of Internet Message Bodies) +/* RFC 2046 (MIME: Media Types) +/* RFC 2822 (Internet Message Format) +/* RFC 3463 (Enhanced Status Codes) +/* RFC 3464 (Delivery status notifications) +/* RFC 5322 (Internet Message Format) +/* DIAGNOSTICS +/* Problems and transactions are logged to \fBsyslogd\fR(8) +/* or \fBpostlogd\fR(8). +/* BUGS +/* Table-driven rewriting rules make it hard to express \fBif then +/* else\fR and other logical relationships. +/* CONFIGURATION PARAMETERS +/* .ad +/* .fi +/* Changes to \fBmain.cf\fR are picked up automatically, as +/* \fBcleanup\fR(8) +/* processes run for only a limited amount of time. Use the command +/* "\fBpostfix reload\fR" to speed up a change. +/* +/* The text below provides only a parameter summary. See +/* \fBpostconf\fR(5) for more details including examples. +/* COMPATIBILITY CONTROLS +/* .ad +/* .fi +/* .IP "\fBundisclosed_recipients_header (see 'postconf -d' output)\fR" +/* Message header that the Postfix \fBcleanup\fR(8) server inserts when a +/* message contains no To: or Cc: message header. +/* .PP +/* Available in Postfix version 2.1 only: +/* .IP "\fBenable_errors_to (no)\fR" +/* Report mail delivery errors to the address specified with the +/* non-standard Errors-To: message header, instead of the envelope +/* sender address (this feature is removed with Postfix version 2.2, is +/* turned off by default with Postfix version 2.1, and is always turned on +/* with older Postfix versions). +/* .PP +/* Available in Postfix version 2.6 and later: +/* .IP "\fBalways_add_missing_headers (no)\fR" +/* Always add (Resent-) From:, To:, Date: or Message-ID: headers +/* when not present. +/* .PP +/* Available in Postfix version 2.9 and later: +/* .IP "\fBenable_long_queue_ids (no)\fR" +/* Enable long, non-repeating, queue IDs (queue file names). +/* .PP +/* Available in Postfix version 3.0 and later: +/* .IP "\fBmessage_drop_headers (bcc, content-length, resent-bcc, return-path)\fR" +/* Names of message headers that the \fBcleanup\fR(8) daemon will remove +/* after applying \fBheader_checks\fR(5) and before invoking Milter applications. +/* .IP "\fBheader_from_format (standard)\fR" +/* The format of the Postfix-generated \fBFrom:\fR header. +/* BUILT-IN CONTENT FILTERING CONTROLS +/* .ad +/* .fi +/* Postfix built-in content filtering is meant to stop a flood of +/* worms or viruses. It is not a general content filter. +/* .IP "\fBbody_checks (empty)\fR" +/* Optional lookup tables for content inspection as specified in +/* the \fBbody_checks\fR(5) manual page. +/* .IP "\fBheader_checks (empty)\fR" +/* Optional lookup tables for content inspection of primary non-MIME +/* message headers, as specified in the \fBheader_checks\fR(5) manual page. +/* .PP +/* Available in Postfix version 2.0 and later: +/* .IP "\fBbody_checks_size_limit (51200)\fR" +/* How much text in a message body segment (or attachment, if you +/* prefer to use that term) is subjected to body_checks inspection. +/* .IP "\fBmime_header_checks ($header_checks)\fR" +/* Optional lookup tables for content inspection of MIME related +/* message headers, as described in the \fBheader_checks\fR(5) manual page. +/* .IP "\fBnested_header_checks ($header_checks)\fR" +/* Optional lookup tables for content inspection of non-MIME message +/* headers in attached messages, as described in the \fBheader_checks\fR(5) +/* manual page. +/* .PP +/* Available in Postfix version 2.3 and later: +/* .IP "\fBmessage_reject_characters (empty)\fR" +/* The set of characters that Postfix will reject in message +/* content. +/* .IP "\fBmessage_strip_characters (empty)\fR" +/* The set of characters that Postfix will remove from message +/* content. +/* .PP +/* Available in Postfix version 3.9, 3.8.5, 3.7.10, 3.6.14, +/* 3.5.24, and later: +/* .IP "\fBcleanup_replace_stray_cr_lf (yes)\fR" +/* Replace each stray <CR> or <LF> character in message +/* content with a space character, to prevent outbound SMTP smuggling, +/* and to make the evaluation of Postfix-added DKIM or other signatures +/* independent from how a remote mail server handles such characters. +/* BEFORE QUEUE MILTER CONTROLS +/* .ad +/* .fi +/* As of version 2.3, Postfix supports the Sendmail version 8 +/* Milter (mail filter) protocol. When mail is not received via +/* the smtpd(8) server, the cleanup(8) server will simulate +/* SMTP events to the extent that this is possible. For details +/* see the MILTER_README document. +/* .IP "\fBnon_smtpd_milters (empty)\fR" +/* A list of Milter (mail filter) applications for new mail that +/* does not arrive via the Postfix \fBsmtpd\fR(8) server. +/* .IP "\fBmilter_protocol (6)\fR" +/* The mail filter protocol version and optional protocol extensions +/* for communication with a Milter application; prior to Postfix 2.6 +/* the default protocol is 2. +/* .IP "\fBmilter_default_action (tempfail)\fR" +/* The default action when a Milter (mail filter) response is +/* unavailable (for example, bad Postfix configuration or Milter +/* failure). +/* .IP "\fBmilter_macro_daemon_name ($myhostname)\fR" +/* The {daemon_name} macro value for Milter (mail filter) applications. +/* .IP "\fBmilter_macro_v ($mail_name $mail_version)\fR" +/* The {v} macro value for Milter (mail filter) applications. +/* .IP "\fBmilter_connect_timeout (30s)\fR" +/* The time limit for connecting to a Milter (mail filter) +/* application, and for negotiating protocol options. +/* .IP "\fBmilter_command_timeout (30s)\fR" +/* The time limit for sending an SMTP command to a Milter (mail +/* filter) application, and for receiving the response. +/* .IP "\fBmilter_content_timeout (300s)\fR" +/* The time limit for sending message content to a Milter (mail +/* filter) application, and for receiving the response. +/* .IP "\fBmilter_connect_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after completion of an SMTP connection. +/* .IP "\fBmilter_helo_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after the SMTP HELO or EHLO command. +/* .IP "\fBmilter_mail_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after the SMTP MAIL FROM command. +/* .IP "\fBmilter_rcpt_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after the SMTP RCPT TO command. +/* .IP "\fBmilter_data_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to version 4 or higher Milter (mail +/* filter) applications after the SMTP DATA command. +/* .IP "\fBmilter_unknown_command_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to version 3 or higher Milter (mail +/* filter) applications after an unknown SMTP command. +/* .IP "\fBmilter_end_of_data_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after the message end-of-data. +/* .PP +/* Available in Postfix version 2.5 and later: +/* .IP "\fBmilter_end_of_header_macros (see 'postconf -d' output)\fR" +/* The macros that are sent to Milter (mail filter) applications +/* after the end of the message header. +/* .PP +/* Available in Postfix version 2.7 and later: +/* .IP "\fBmilter_header_checks (empty)\fR" +/* Optional lookup tables for content inspection of message headers +/* that are produced by Milter applications. +/* .PP +/* Available in Postfix version 3.1 and later: +/* .IP "\fBmilter_macro_defaults (empty)\fR" +/* Optional list of \fIname=value\fR pairs that specify default +/* values for arbitrary macros that Postfix may send to Milter +/* applications. +/* MIME PROCESSING CONTROLS +/* .ad +/* .fi +/* Available in Postfix version 2.0 and later: +/* .IP "\fBdisable_mime_input_processing (no)\fR" +/* Turn off MIME processing while receiving mail. +/* .IP "\fBmime_boundary_length_limit (2048)\fR" +/* The maximal length of MIME multipart boundary strings. +/* .IP "\fBmime_nesting_limit (100)\fR" +/* The maximal recursion level that the MIME processor will handle. +/* .IP "\fBstrict_8bitmime (no)\fR" +/* Enable both strict_7bit_headers and strict_8bitmime_body. +/* .IP "\fBstrict_7bit_headers (no)\fR" +/* Reject mail with 8-bit text in message headers. +/* .IP "\fBstrict_8bitmime_body (no)\fR" +/* Reject 8-bit message body text without 8-bit MIME content encoding +/* information. +/* .IP "\fBstrict_mime_encoding_domain (no)\fR" +/* Reject mail with invalid Content-Transfer-Encoding: information +/* for the message/* or multipart/* MIME content types. +/* .PP +/* Available in Postfix version 2.5 and later: +/* .IP "\fBdetect_8bit_encoding_header (yes)\fR" +/* Automatically detect 8BITMIME body content by looking at +/* Content-Transfer-Encoding: message headers; historically, this +/* behavior was hard-coded to be "always on". +/* AUTOMATIC BCC RECIPIENT CONTROLS +/* .ad +/* .fi +/* Postfix can automatically add BCC (blind carbon copy) +/* when mail enters the mail system: +/* .IP "\fBalways_bcc (empty)\fR" +/* Optional address that receives a "blind carbon copy" of each message +/* that is received by the Postfix mail system. +/* .PP +/* Available in Postfix version 2.1 and later: +/* .IP "\fBsender_bcc_maps (empty)\fR" +/* Optional BCC (blind carbon-copy) address lookup tables, indexed +/* by sender address. +/* .IP "\fBrecipient_bcc_maps (empty)\fR" +/* Optional BCC (blind carbon-copy) address lookup tables, indexed by +/* recipient address. +/* ADDRESS TRANSFORMATION CONTROLS +/* .ad +/* .fi +/* Address rewriting is delegated to the \fBtrivial-rewrite\fR(8) daemon. +/* The \fBcleanup\fR(8) server implements table driven address mapping. +/* .IP "\fBempty_address_recipient (MAILER-DAEMON)\fR" +/* The recipient of mail addressed to the null address. +/* .IP "\fBcanonical_maps (empty)\fR" +/* Optional address mapping lookup tables for message headers and +/* envelopes. +/* .IP "\fBrecipient_canonical_maps (empty)\fR" +/* Optional address mapping lookup tables for envelope and header +/* recipient addresses. +/* .IP "\fBsender_canonical_maps (empty)\fR" +/* Optional address mapping lookup tables for envelope and header +/* sender addresses. +/* .IP "\fBmasquerade_classes (envelope_sender, header_sender, header_recipient)\fR" +/* What addresses are subject to address masquerading. +/* .IP "\fBmasquerade_domains (empty)\fR" +/* Optional list of domains whose subdomain structure will be stripped +/* off in email addresses. +/* .IP "\fBmasquerade_exceptions (empty)\fR" +/* Optional list of user names that are not subjected to address +/* masquerading, even when their addresses match $masquerade_domains. +/* .IP "\fBpropagate_unmatched_extensions (canonical, virtual)\fR" +/* What address lookup tables copy an address extension from the lookup +/* key to the lookup result. +/* .PP +/* Available before Postfix version 2.0: +/* .IP "\fBvirtual_maps (empty)\fR" +/* Optional lookup tables with a) names of domains for which all +/* addresses are aliased to addresses in other local or remote domains, +/* and b) addresses that are aliased to addresses in other local or +/* remote domains. +/* .PP +/* Available in Postfix version 2.0 and later: +/* .IP "\fBvirtual_alias_maps ($virtual_maps)\fR" +/* Optional lookup tables that alias specific mail addresses or domains +/* to other local or remote address. +/* .PP +/* Available in Postfix version 2.2 and later: +/* .IP "\fBcanonical_classes (envelope_sender, envelope_recipient, header_sender, header_recipient)\fR" +/* What addresses are subject to canonical_maps address mapping. +/* .IP "\fBrecipient_canonical_classes (envelope_recipient, header_recipient)\fR" +/* What addresses are subject to recipient_canonical_maps address +/* mapping. +/* .IP "\fBsender_canonical_classes (envelope_sender, header_sender)\fR" +/* What addresses are subject to sender_canonical_maps address +/* mapping. +/* .IP "\fBremote_header_rewrite_domain (empty)\fR" +/* Don't rewrite message headers from remote clients at all when +/* this parameter is empty; otherwise, rewrite message headers and +/* append the specified domain name to incomplete addresses. +/* RESOURCE AND RATE CONTROLS +/* .ad +/* .fi +/* .IP "\fBduplicate_filter_limit (1000)\fR" +/* The maximal number of addresses remembered by the address +/* duplicate filter for \fBaliases\fR(5) or \fBvirtual\fR(5) alias expansion, or +/* for \fBshowq\fR(8) queue displays. +/* .IP "\fBheader_size_limit (102400)\fR" +/* The maximal amount of memory in bytes for storing a message header. +/* .IP "\fBhopcount_limit (50)\fR" +/* The maximal number of Received: message headers that is allowed +/* in the primary message headers. +/* .IP "\fBin_flow_delay (1s)\fR" +/* Time to pause before accepting a new message, when the message +/* arrival rate exceeds the message delivery rate. +/* .IP "\fBmessage_size_limit (10240000)\fR" +/* The maximal size in bytes of a message, including envelope information. +/* .PP +/* Available in Postfix version 2.0 and later: +/* .IP "\fBheader_address_token_limit (10240)\fR" +/* The maximal number of address tokens are allowed in an address +/* message header. +/* .IP "\fBmime_boundary_length_limit (2048)\fR" +/* The maximal length of MIME multipart boundary strings. +/* .IP "\fBmime_nesting_limit (100)\fR" +/* The maximal recursion level that the MIME processor will handle. +/* .IP "\fBqueue_file_attribute_count_limit (100)\fR" +/* The maximal number of (name=value) attributes that may be stored +/* in a Postfix queue file. +/* .PP +/* Available in Postfix version 2.1 and later: +/* .IP "\fBvirtual_alias_expansion_limit (1000)\fR" +/* The maximal number of addresses that virtual alias expansion produces +/* from each original recipient. +/* .IP "\fBvirtual_alias_recursion_limit (1000)\fR" +/* The maximal nesting depth of virtual alias expansion. +/* .PP +/* Available in Postfix version 3.0 and later: +/* .IP "\fBvirtual_alias_address_length_limit (1000)\fR" +/* The maximal length of an email address after virtual alias expansion. +/* SMTPUTF8 CONTROLS +/* .ad +/* .fi +/* Preliminary SMTPUTF8 support is introduced with Postfix 3.0. +/* .IP "\fBsmtputf8_enable (yes)\fR" +/* Enable preliminary SMTPUTF8 support for the protocols described +/* in RFC 6531..6533. +/* .IP "\fBsmtputf8_autodetect_classes (sendmail, verify)\fR" +/* Detect that a message requires SMTPUTF8 support for the specified +/* mail origin classes. +/* .PP +/* Available in Postfix version 3.2 and later: +/* .IP "\fBenable_idna2003_compatibility (no)\fR" +/* Enable 'transitional' compatibility between IDNA2003 and IDNA2008, +/* when converting UTF-8 domain names to/from the ASCII form that is +/* used for DNS lookups. +/* MISCELLANEOUS CONTROLS +/* .ad +/* .fi +/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR" +/* The default location of the Postfix main.cf and master.cf +/* configuration files. +/* .IP "\fBdaemon_timeout (18000s)\fR" +/* How much time a Postfix daemon process may take to handle a +/* request before it is terminated by a built-in watchdog timer. +/* .IP "\fBdelay_logging_resolution_limit (2)\fR" +/* The maximal number of digits after the decimal point when logging +/* sub-second delay values. +/* .IP "\fBdelay_warning_time (0h)\fR" +/* The time after which the sender receives a copy of the message +/* headers of mail that is still queued. +/* .IP "\fBipc_timeout (3600s)\fR" +/* The time limit for sending or receiving information over an internal +/* communication channel. +/* .IP "\fBmax_idle (100s)\fR" +/* The maximum amount of time that an idle Postfix daemon process waits +/* for an incoming connection before terminating voluntarily. +/* .IP "\fBmax_use (100)\fR" +/* The maximal number of incoming connections that a Postfix daemon +/* process will service before terminating voluntarily. +/* .IP "\fBmyhostname (see 'postconf -d' output)\fR" +/* The internet hostname of this mail system. +/* .IP "\fBmyorigin ($myhostname)\fR" +/* The domain name that locally-posted mail appears to come +/* from, and that locally posted mail is delivered to. +/* .IP "\fBprocess_id (read-only)\fR" +/* The process ID of a Postfix command or daemon process. +/* .IP "\fBprocess_name (read-only)\fR" +/* The process name of a Postfix command or daemon process. +/* .IP "\fBqueue_directory (see 'postconf -d' output)\fR" +/* The location of the Postfix top-level queue directory. +/* .IP "\fBsoft_bounce (no)\fR" +/* Safety net to keep mail queued that would otherwise be returned to +/* the sender. +/* .IP "\fBsyslog_facility (mail)\fR" +/* The syslog facility of Postfix logging. +/* .IP "\fBsyslog_name (see 'postconf -d' output)\fR" +/* A prefix that is prepended to the process name in syslog +/* records, so that, for example, "smtpd" becomes "prefix/smtpd". +/* .PP +/* Available in Postfix version 2.1 and later: +/* .IP "\fBenable_original_recipient (yes)\fR" +/* Enable support for the original recipient address after an +/* address is rewritten to a different address (for example with +/* aliasing or with canonical mapping). +/* .PP +/* Available in Postfix 3.3 and later: +/* .IP "\fBservice_name (read-only)\fR" +/* The master.cf service name of a Postfix daemon process. +/* .PP +/* Available in Postfix 3.5 and later: +/* .IP "\fBinfo_log_address_format (external)\fR" +/* The email address form that will be used in non-debug logging +/* (info, warning, etc.). +/* FILES +/* /etc/postfix/canonical*, canonical mapping table +/* /etc/postfix/virtual*, virtual mapping table +/* SEE ALSO +/* trivial-rewrite(8), address rewriting +/* qmgr(8), queue manager +/* header_checks(5), message header content inspection +/* body_checks(5), body parts content inspection +/* canonical(5), canonical address lookup table format +/* virtual(5), virtual alias lookup table format +/* postconf(5), configuration parameters +/* master(5), generic daemon options +/* master(8), process manager +/* postlogd(8), Postfix logging +/* syslogd(8), system logging +/* README FILES +/* .ad +/* .fi +/* Use "\fBpostconf readme_directory\fR" or +/* "\fBpostconf html_directory\fR" to locate this information. +/* .na +/* .nf +/* ADDRESS_REWRITING_README Postfix address manipulation +/* CONTENT_INSPECTION_README content inspection +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/* +/* Wietse Venema +/* Google, Inc. +/* 111 8th Avenue +/* New York, NY 10011, USA +/*--*/ + +/* System library. */ + +#include <sys_defs.h> +#include <signal.h> +#include <unistd.h> +#include <stdlib.h> + +/* Utility library. */ + +#include <msg.h> +#include <vstring.h> +#include <dict.h> + +/* Global library. */ + +#include <mail_conf.h> +#include <cleanup_user.h> +#include <mail_proto.h> +#include <mail_params.h> +#include <record.h> +#include <rec_type.h> +#include <mail_version.h> + +/* Single-threaded server skeleton. */ + +#include <mail_server.h> + +/* Application-specific. */ + +#include "cleanup.h" + +/* cleanup_service - process one request to inject a message into the queue */ + +static void cleanup_service(VSTREAM *src, char *unused_service, char **argv) +{ + VSTRING *buf = vstring_alloc(100); + CLEANUP_STATE *state; + int flags; + int type = 0; + int status; + + /* + * Sanity check. This service takes no command-line arguments. + */ + if (argv[0]) + msg_fatal("unexpected command-line argument: %s", argv[0]); + + /* + * Open a queue file and initialize state. + */ + state = cleanup_open(src); + + /* + * Send the queue id to the client. Read client processing options. If we + * can't read the client processing options we can pretty much forget + * about the whole operation. + */ + attr_print(src, ATTR_FLAG_NONE, + SEND_ATTR_STR(MAIL_ATTR_PROTO, MAIL_ATTR_PROTO_CLEANUP), + SEND_ATTR_STR(MAIL_ATTR_QUEUEID, state->queue_id), + ATTR_TYPE_END); + if (attr_scan(src, ATTR_FLAG_STRICT, + RECV_ATTR_INT(MAIL_ATTR_FLAGS, &flags), + ATTR_TYPE_END) != 1) { + state->errs |= CLEANUP_STAT_BAD; + flags = 0; + } + cleanup_control(state, flags); + + /* + * XXX Rely on the front-end programs to enforce record size limits. + * + * First, copy the envelope records to the queue file. Then, copy the + * message content (headers and body). Finally, attach any information + * extracted from message headers. + */ + while (CLEANUP_OUT_OK(state)) { + if ((type = rec_get_raw(src, buf, 0, REC_FLAG_NONE)) < 0) { + state->errs |= CLEANUP_STAT_BAD; + break; + } + if (REC_GET_HIDDEN_TYPE(type)) { + msg_warn("%s: record type %d not allowed - discarding this message", + state->queue_id, type); + state->errs |= CLEANUP_STAT_BAD; + break; + } + CLEANUP_RECORD(state, type, vstring_str(buf), VSTRING_LEN(buf)); + if (type == REC_TYPE_END) + break; + } + + /* + * Keep reading in case of problems, until the sender is ready to receive + * our status report. + */ + if (CLEANUP_OUT_OK(state) == 0 && type > 0) { + while (type != REC_TYPE_END + && (type = rec_get_raw(src, buf, 0, REC_FLAG_NONE)) > 0) { + if (type == REC_TYPE_MILT_COUNT) { + int milter_count = atoi(vstring_str(buf)); + + /* Avoid deadlock. */ + if (milter_count >= 0) + cleanup_milter_receive(state, milter_count); + } + } + } + + /* + * Log something to make timeout errors easier to debug. + */ + if (vstream_ftimeout(src)) + msg_warn("%s: read timeout on %s", + state->queue_id, VSTREAM_PATH(src)); + + /* + * Finish this message, and report the result status to the client. + */ + status = cleanup_flush(state); /* in case state is modified */ + attr_print(src, ATTR_FLAG_NONE, + SEND_ATTR_INT(MAIL_ATTR_STATUS, status), + SEND_ATTR_STR(MAIL_ATTR_WHY, + (state->flags & CLEANUP_FLAG_SMTP_REPLY) + && state->smtp_reply ? state->smtp_reply : + state->reason ? state->reason : ""), + ATTR_TYPE_END); + cleanup_free(state); + + /* + * Cleanup. + */ + vstring_free(buf); +} + +/* pre_accept - see if tables have changed */ + +static void pre_accept(char *unused_name, char **unused_argv) +{ + const char *table; + + if ((table = dict_changed_name()) != 0) { + msg_info("table %s has changed -- restarting", table); + exit(0); + } +} + +MAIL_VERSION_STAMP_DECLARE; + +/* main - the main program */ + +int main(int argc, char **argv) +{ + + /* + * Fingerprint executables and core dumps. + */ + MAIL_VERSION_STAMP_ALLOCATE; + + /* + * Clean up an incomplete queue file in case of a fatal run-time error, + * or after receiving SIGTERM from the master at shutdown time. + */ + signal(SIGTERM, cleanup_sig); + msg_cleanup(cleanup_all); + + /* + * Pass control to the single-threaded service skeleton. + */ + single_server_main(argc, argv, cleanup_service, + CA_MAIL_SERVER_INT_TABLE(cleanup_int_table), + CA_MAIL_SERVER_BOOL_TABLE(cleanup_bool_table), + CA_MAIL_SERVER_STR_TABLE(cleanup_str_table), + CA_MAIL_SERVER_TIME_TABLE(cleanup_time_table), + CA_MAIL_SERVER_PRE_INIT(cleanup_pre_jail), + CA_MAIL_SERVER_POST_INIT(cleanup_post_jail), + CA_MAIL_SERVER_PRE_ACCEPT(pre_accept), + CA_MAIL_SERVER_IN_FLOW_DELAY, + CA_MAIL_SERVER_UNLIMITED, + 0); +} |