summaryrefslogtreecommitdiffstats
path: root/src/bounce/bounce.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 19:59:03 +0000
commita848231ae0f346dc7cc000973fbeb65b0894ee92 (patch)
tree44b60b367c86723cc78383ef247885d72b388afe /src/bounce/bounce.c
parentInitial commit. (diff)
downloadpostfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.tar.xz
postfix-a848231ae0f346dc7cc000973fbeb65b0894ee92.zip
Adding upstream version 3.8.5.upstream/3.8.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/bounce/bounce.c')
-rw-r--r--src/bounce/bounce.c713
1 files changed, 713 insertions, 0 deletions
diff --git a/src/bounce/bounce.c b/src/bounce/bounce.c
new file mode 100644
index 0000000..2393929
--- /dev/null
+++ b/src/bounce/bounce.c
@@ -0,0 +1,713 @@
+/*++
+/* NAME
+/* bounce 8
+/* SUMMARY
+/* Postfix delivery status reports
+/* SYNOPSIS
+/* \fBbounce\fR [generic Postfix daemon options]
+/* DESCRIPTION
+/* The \fBbounce\fR(8) daemon maintains per-message log files with
+/* delivery status information. Each log file is named after the
+/* queue file that it corresponds to, and is kept in a queue subdirectory
+/* named after the service name in the \fBmaster.cf\fR file (either
+/* \fBbounce\fR, \fBdefer\fR or \fBtrace\fR).
+/* This program expects to be run from the \fBmaster\fR(8) process
+/* manager.
+/*
+/* The \fBbounce\fR(8) daemon processes two types of service requests:
+/* .IP \(bu
+/* Append a recipient (non-)delivery status record to a per-message
+/* log file.
+/* .IP \(bu
+/* Enqueue a delivery status notification message, with a copy
+/* of a per-message log file and of the corresponding message.
+/* When the delivery status notification message is
+/* enqueued successfully, the per-message log file is deleted.
+/* .PP
+/* The software does a best notification effort. A non-delivery
+/* notification is sent even when the log file or the original
+/* message cannot be read.
+/*
+/* Optionally, a bounce (defer, trace) client can request that the
+/* per-message log file be deleted when the requested operation fails.
+/* This is used by clients that cannot retry transactions by
+/* themselves, and that depend on retry logic in their own client.
+/* STANDARDS
+/* RFC 822 (ARPA Internet Text Messages)
+/* RFC 2045 (Format of Internet Message Bodies)
+/* RFC 2822 (Internet Message Format)
+/* RFC 3462 (Delivery Status Notifications)
+/* RFC 3464 (Delivery Status Notifications)
+/* RFC 3834 (Auto-Submitted: message header)
+/* RFC 5322 (Internet Message Format)
+/* RFC 6531 (Internationalized SMTP)
+/* RFC 6532 (Internationalized Message Format)
+/* RFC 6533 (Internationalized Delivery Status Notifications)
+/* DIAGNOSTICS
+/* Problems and transactions are logged to \fBsyslogd\fR(8)
+/* or \fBpostlogd\fR(8).
+/* CONFIGURATION PARAMETERS
+/* .ad
+/* .fi
+/* Changes to \fBmain.cf\fR are picked up automatically, as \fBbounce\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.
+/* .IP "\fB2bounce_notice_recipient (postmaster)\fR"
+/* The recipient of undeliverable mail that cannot be returned to
+/* the sender.
+/* .IP "\fBbackwards_bounce_logfile_compatibility (yes)\fR"
+/* Produce additional \fBbounce\fR(8) logfile records that can be read by
+/* Postfix versions before 2.0.
+/* .IP "\fBbounce_notice_recipient (postmaster)\fR"
+/* The recipient of postmaster notifications with the message headers
+/* of mail that Postfix did not deliver and of SMTP conversation
+/* transcripts of mail that Postfix did not receive.
+/* .IP "\fBbounce_size_limit (50000)\fR"
+/* The maximal amount of original message text that is sent in a
+/* non-delivery notification.
+/* .IP "\fBbounce_template_file (empty)\fR"
+/* Pathname of a configuration file with bounce message templates.
+/* .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_notice_recipient (postmaster)\fR"
+/* The recipient of postmaster notifications with the message headers
+/* of mail that cannot be delivered within $delay_warning_time time
+/* units.
+/* .IP "\fBdeliver_lock_attempts (20)\fR"
+/* The maximal number of attempts to acquire an exclusive lock on a
+/* mailbox file or \fBbounce\fR(8) logfile.
+/* .IP "\fBdeliver_lock_delay (1s)\fR"
+/* The time between attempts to acquire an exclusive lock on a mailbox
+/* file or \fBbounce\fR(8) logfile.
+/* .IP "\fBipc_timeout (3600s)\fR"
+/* The time limit for sending or receiving information over an internal
+/* communication channel.
+/* .IP "\fBinternal_mail_filter_classes (empty)\fR"
+/* What categories of Postfix-generated mail are subject to
+/* before-queue content inspection by non_smtpd_milters, header_checks
+/* and body_checks.
+/* .IP "\fBmail_name (Postfix)\fR"
+/* The mail system name that is displayed in Received: headers, in
+/* the SMTP greeting banner, and in bounced mail.
+/* .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 "\fBnotify_classes (resource, software)\fR"
+/* The list of error classes that are reported to the postmaster.
+/* .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 "\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 3.0 and later:
+/* .IP "\fBsmtputf8_autodetect_classes (sendmail, verify)\fR"
+/* Detect that a message requires SMTPUTF8 support for the specified
+/* mail origin classes.
+/* .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 3.6 and later:
+/* .IP "\fBenable_threaded_bounces (no)\fR"
+/* Enable non-delivery, success, and delay notifications that link
+/* to the original message by including a References: and In-Reply-To:
+/* header with the original Message-ID value.
+/* .PP
+/* Available in Postfix 3.7 and later:
+/* .IP "\fBheader_from_format (standard)\fR"
+/* The format of the Postfix-generated \fBFrom:\fR header.
+/* FILES
+/* /var/spool/postfix/bounce/* non-delivery records
+/* /var/spool/postfix/defer/* non-delivery records
+/* /var/spool/postfix/trace/* delivery status records
+/* SEE ALSO
+/* bounce(5), bounce message template format
+/* qmgr(8), queue manager
+/* postconf(5), configuration parameters
+/* master(5), generic daemon options
+/* master(8), process manager
+/* postlogd(8), Postfix logging
+/* syslogd(8), system logging
+/* 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 <string.h>
+#include <stdlib.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <stringops.h>
+#include <load_file.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+#include <mail_queue.h>
+#include <mail_params.h>
+#include <mail_version.h>
+#include <mail_conf.h>
+#include <bounce.h>
+#include <mail_addr.h>
+#include <rcpt_buf.h>
+#include <dsb_scan.h>
+#include <hfrom_format.h>
+
+/* Single-threaded server skeleton. */
+
+#include <mail_server.h>
+
+/* Application-specific. */
+
+#include <bounce_service.h>
+
+ /*
+ * Tunables.
+ */
+int var_bounce_limit;
+int var_max_queue_time;
+int var_delay_warn_time;
+char *var_notify_classes;
+char *var_bounce_rcpt;
+char *var_2bounce_rcpt;
+char *var_delay_rcpt;
+char *var_bounce_tmpl;
+bool var_threaded_bounce;
+char *var_hfrom_format; /* header_from_format */
+
+ /*
+ * We're single threaded, so we can avoid some memory allocation overhead.
+ */
+static VSTRING *queue_id;
+static VSTRING *queue_name;
+static RCPT_BUF *rcpt_buf;
+static VSTRING *encoding;
+static VSTRING *sender;
+static VSTRING *dsn_envid;
+static VSTRING *verp_delims;
+static DSN_BUF *dsn_buf;
+
+ /*
+ * Templates.
+ */
+BOUNCE_TEMPLATES *bounce_templates;
+
+ /*
+ * From: header format.
+ */
+int bounce_hfrom_format;
+
+#define STR vstring_str
+
+#define VS_NEUTER(s) printable(vstring_str(s), '?')
+
+/* bounce_append_proto - bounce_append server protocol */
+
+static int bounce_append_proto(char *service_name, VSTREAM *client)
+{
+ const char *myname = "bounce_append_proto";
+ int flags;
+
+ /*
+ * Read and validate the client request.
+ */
+ if (mail_command_server(client,
+ RECV_ATTR_INT(MAIL_ATTR_FLAGS, &flags),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUEID, queue_id),
+ RECV_ATTR_FUNC(rcpb_scan, (void *) rcpt_buf),
+ RECV_ATTR_FUNC(dsb_scan, (void *) dsn_buf),
+ ATTR_TYPE_END) != 4) {
+ msg_warn("malformed request");
+ return (-1);
+ }
+
+ /*
+ * Sanitize input.
+ */
+ if (mail_queue_id_ok(STR(queue_id)) == 0) {
+ msg_warn("malformed queue id: %s", printable(STR(queue_id), '?'));
+ return (-1);
+ }
+ VS_NEUTER(rcpt_buf->address);
+ VS_NEUTER(rcpt_buf->orig_addr);
+ VS_NEUTER(rcpt_buf->dsn_orcpt);
+ VS_NEUTER(dsn_buf->status);
+ VS_NEUTER(dsn_buf->action);
+ VS_NEUTER(dsn_buf->reason);
+ VS_NEUTER(dsn_buf->dtype);
+ VS_NEUTER(dsn_buf->dtext);
+ VS_NEUTER(dsn_buf->mtype);
+ VS_NEUTER(dsn_buf->mname);
+ (void) RECIPIENT_FROM_RCPT_BUF(rcpt_buf);
+ (void) DSN_FROM_DSN_BUF(dsn_buf);
+
+ /*
+ * Beware: some DSN or RECIPIENT fields may be null; access dsn_buf and
+ * rcpt_buf buffers instead. See DSN_FROM_DSN_BUF() and
+ * RECIPIENT_FROM_RCPT_BUF().
+ */
+ if (msg_verbose)
+ msg_info("%s: flags=0x%x service=%s id=%s org_to=%s to=%s off=%ld dsn_org=%s, notif=0x%x stat=%s act=%s why=%s",
+ myname, flags, service_name, STR(queue_id),
+ STR(rcpt_buf->orig_addr), STR(rcpt_buf->address),
+ rcpt_buf->offset, STR(rcpt_buf->dsn_orcpt),
+ rcpt_buf->dsn_notify, STR(dsn_buf->status),
+ STR(dsn_buf->action), STR(dsn_buf->reason));
+
+ /*
+ * On request by the client, set up a trap to delete the log file in case
+ * of errors.
+ */
+ if (flags & BOUNCE_FLAG_CLEAN)
+ bounce_cleanup_register(service_name, STR(queue_id));
+
+ /*
+ * Execute the request.
+ */
+ return (bounce_append_service(flags, service_name, STR(queue_id),
+ &rcpt_buf->rcpt, &dsn_buf->dsn));
+}
+
+/* bounce_notify_proto - bounce_notify server protocol */
+
+static int bounce_notify_proto(char *service_name, VSTREAM *client,
+ int (*service) (int, char *, char *, char *,
+ char *, int, char *, char *, int,
+ BOUNCE_TEMPLATES *))
+{
+ const char *myname = "bounce_notify_proto";
+ int flags;
+ int smtputf8;
+ int dsn_ret;
+
+ /*
+ * Read and validate the client request.
+ */
+ if (mail_command_server(client,
+ RECV_ATTR_INT(MAIL_ATTR_FLAGS, &flags),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUE, queue_name),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUEID, queue_id),
+ RECV_ATTR_STR(MAIL_ATTR_ENCODING, encoding),
+ RECV_ATTR_INT(MAIL_ATTR_SMTPUTF8, &smtputf8),
+ RECV_ATTR_STR(MAIL_ATTR_SENDER, sender),
+ RECV_ATTR_STR(MAIL_ATTR_DSN_ENVID, dsn_envid),
+ RECV_ATTR_INT(MAIL_ATTR_DSN_RET, &dsn_ret),
+ ATTR_TYPE_END) != 8) {
+ msg_warn("malformed request");
+ return (-1);
+ }
+
+ /*
+ * Sanitize input.
+ */
+ if (mail_queue_name_ok(STR(queue_name)) == 0) {
+ msg_warn("malformed queue name: %s", printable(STR(queue_name), '?'));
+ return (-1);
+ }
+ if (mail_queue_id_ok(STR(queue_id)) == 0) {
+ msg_warn("malformed queue id: %s", printable(STR(queue_id), '?'));
+ return (-1);
+ }
+ VS_NEUTER(encoding);
+ VS_NEUTER(sender);
+ VS_NEUTER(dsn_envid);
+ if (msg_verbose)
+ msg_info("%s: flags=0x%x service=%s queue=%s id=%s encoding=%s smtputf8=%d sender=%s envid=%s ret=0x%x",
+ myname, flags, service_name, STR(queue_name), STR(queue_id),
+ STR(encoding), smtputf8, STR(sender), STR(dsn_envid),
+ dsn_ret);
+
+ /*
+ * On request by the client, set up a trap to delete the log file in case
+ * of errors.
+ */
+ if (flags & BOUNCE_FLAG_CLEAN)
+ bounce_cleanup_register(service_name, STR(queue_id));
+
+ /*
+ * Execute the request.
+ */
+ return (service(flags, service_name, STR(queue_name),
+ STR(queue_id), STR(encoding), smtputf8,
+ STR(sender), STR(dsn_envid), dsn_ret,
+ bounce_templates));
+}
+
+/* bounce_verp_proto - bounce_notify server protocol, VERP style */
+
+static int bounce_verp_proto(char *service_name, VSTREAM *client)
+{
+ const char *myname = "bounce_verp_proto";
+ int flags;
+ int smtputf8;
+ int dsn_ret;
+
+ /*
+ * Read and validate the client request.
+ */
+ if (mail_command_server(client,
+ RECV_ATTR_INT(MAIL_ATTR_FLAGS, &flags),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUE, queue_name),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUEID, queue_id),
+ RECV_ATTR_STR(MAIL_ATTR_ENCODING, encoding),
+ RECV_ATTR_INT(MAIL_ATTR_SMTPUTF8, &smtputf8),
+ RECV_ATTR_STR(MAIL_ATTR_SENDER, sender),
+ RECV_ATTR_STR(MAIL_ATTR_DSN_ENVID, dsn_envid),
+ RECV_ATTR_INT(MAIL_ATTR_DSN_RET, &dsn_ret),
+ RECV_ATTR_STR(MAIL_ATTR_VERPDL, verp_delims),
+ ATTR_TYPE_END) != 9) {
+ msg_warn("malformed request");
+ return (-1);
+ }
+
+ /*
+ * Sanitize input.
+ */
+ if (mail_queue_name_ok(STR(queue_name)) == 0) {
+ msg_warn("malformed queue name: %s", printable(STR(queue_name), '?'));
+ return (-1);
+ }
+ if (mail_queue_id_ok(STR(queue_id)) == 0) {
+ msg_warn("malformed queue id: %s", printable(STR(queue_id), '?'));
+ return (-1);
+ }
+ VS_NEUTER(encoding);
+ VS_NEUTER(sender);
+ VS_NEUTER(dsn_envid);
+ VS_NEUTER(verp_delims);
+ if (strlen(STR(verp_delims)) != 2) {
+ msg_warn("malformed verp delimiter string: %s", STR(verp_delims));
+ return (-1);
+ }
+ if (msg_verbose)
+ msg_info("%s: flags=0x%x service=%s queue=%s id=%s encoding=%s smtputf8=%d sender=%s envid=%s ret=0x%x delim=%s",
+ myname, flags, service_name, STR(queue_name),
+ STR(queue_id), STR(encoding), smtputf8, STR(sender),
+ STR(dsn_envid), dsn_ret, STR(verp_delims));
+
+ /*
+ * On request by the client, set up a trap to delete the log file in case
+ * of errors.
+ */
+ if (flags & BOUNCE_FLAG_CLEAN)
+ bounce_cleanup_register(service_name, STR(queue_id));
+
+ /*
+ * Execute the request. Fall back to traditional notification if a bounce
+ * was returned as undeliverable, because we don't want to VERPify those.
+ */
+ if (!*STR(sender) || !strcasecmp_utf8(STR(sender),
+ mail_addr_double_bounce())) {
+ msg_warn("request to send VERP-style notification of bounced mail");
+ return (bounce_notify_service(flags, service_name, STR(queue_name),
+ STR(queue_id), STR(encoding), smtputf8,
+ STR(sender), STR(dsn_envid), dsn_ret,
+ bounce_templates));
+ } else
+ return (bounce_notify_verp(flags, service_name, STR(queue_name),
+ STR(queue_id), STR(encoding), smtputf8,
+ STR(sender), STR(dsn_envid), dsn_ret,
+ STR(verp_delims), bounce_templates));
+}
+
+/* bounce_one_proto - bounce_one server protocol */
+
+static int bounce_one_proto(char *service_name, VSTREAM *client)
+{
+ const char *myname = "bounce_one_proto";
+ int flags;
+ int smtputf8;
+ int dsn_ret;
+
+ /*
+ * Read and validate the client request.
+ */
+ if (mail_command_server(client,
+ RECV_ATTR_INT(MAIL_ATTR_FLAGS, &flags),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUE, queue_name),
+ RECV_ATTR_STR(MAIL_ATTR_QUEUEID, queue_id),
+ RECV_ATTR_STR(MAIL_ATTR_ENCODING, encoding),
+ RECV_ATTR_INT(MAIL_ATTR_SMTPUTF8, &smtputf8),
+ RECV_ATTR_STR(MAIL_ATTR_SENDER, sender),
+ RECV_ATTR_STR(MAIL_ATTR_DSN_ENVID, dsn_envid),
+ RECV_ATTR_INT(MAIL_ATTR_DSN_RET, &dsn_ret),
+ RECV_ATTR_FUNC(rcpb_scan, (void *) rcpt_buf),
+ RECV_ATTR_FUNC(dsb_scan, (void *) dsn_buf),
+ ATTR_TYPE_END) != 10) {
+ msg_warn("malformed request");
+ return (-1);
+ }
+
+ /*
+ * Sanitize input.
+ */
+ if (strcmp(service_name, MAIL_SERVICE_BOUNCE) != 0) {
+ msg_warn("wrong service name \"%s\" for one-recipient bouncing",
+ service_name);
+ return (-1);
+ }
+ if (mail_queue_name_ok(STR(queue_name)) == 0) {
+ msg_warn("malformed queue name: %s", printable(STR(queue_name), '?'));
+ return (-1);
+ }
+ if (mail_queue_id_ok(STR(queue_id)) == 0) {
+ msg_warn("malformed queue id: %s", printable(STR(queue_id), '?'));
+ return (-1);
+ }
+ VS_NEUTER(encoding);
+ VS_NEUTER(sender);
+ VS_NEUTER(dsn_envid);
+ VS_NEUTER(rcpt_buf->address);
+ VS_NEUTER(rcpt_buf->orig_addr);
+ VS_NEUTER(rcpt_buf->dsn_orcpt);
+ VS_NEUTER(dsn_buf->status);
+ VS_NEUTER(dsn_buf->action);
+ VS_NEUTER(dsn_buf->reason);
+ VS_NEUTER(dsn_buf->dtype);
+ VS_NEUTER(dsn_buf->dtext);
+ VS_NEUTER(dsn_buf->mtype);
+ VS_NEUTER(dsn_buf->mname);
+ (void) RECIPIENT_FROM_RCPT_BUF(rcpt_buf);
+ (void) DSN_FROM_DSN_BUF(dsn_buf);
+
+ /*
+ * Beware: some DSN or RECIPIENT fields may be null; access dsn_buf and
+ * rcpt_buf buffers instead. See DSN_FROM_DSN_BUF() and
+ * RECIPIENT_FROM_RCPT_BUF().
+ */
+ if (msg_verbose)
+ msg_info("%s: flags=0x%x queue=%s id=%s encoding=%s smtputf8=%d sender=%s envid=%s dsn_ret=0x%x orig_to=%s to=%s off=%ld dsn_orig=%s notif=0x%x stat=%s act=%s why=%s",
+ myname, flags, STR(queue_name), STR(queue_id),
+ STR(encoding), smtputf8, STR(sender), STR(dsn_envid),
+ dsn_ret, STR(rcpt_buf->orig_addr), STR(rcpt_buf->address),
+ rcpt_buf->offset, STR(rcpt_buf->dsn_orcpt),
+ rcpt_buf->dsn_notify, STR(dsn_buf->status),
+ STR(dsn_buf->action), STR(dsn_buf->reason));
+
+ /*
+ * Execute the request.
+ */
+ return (bounce_one_service(flags, STR(queue_name), STR(queue_id),
+ STR(encoding), smtputf8, STR(sender),
+ STR(dsn_envid), dsn_ret, rcpt_buf,
+ dsn_buf, bounce_templates));
+}
+
+/* bounce_service - parse bounce command type and delegate */
+
+static void bounce_service(VSTREAM *client, char *service_name, char **argv)
+{
+ int command;
+ int status;
+
+ /*
+ * Sanity check. This service takes no command-line arguments. The
+ * service name should be usable as a subdirectory name.
+ */
+ if (argv[0])
+ msg_fatal("unexpected command-line argument: %s", argv[0]);
+ if (mail_queue_name_ok(service_name) == 0)
+ msg_fatal("malformed service name: %s", service_name);
+
+ /*
+ * Announce the protocol.
+ */
+ attr_print(client, ATTR_FLAG_NONE,
+ SEND_ATTR_STR(MAIL_ATTR_PROTO, MAIL_ATTR_PROTO_BOUNCE),
+ ATTR_TYPE_END);
+ (void) vstream_fflush(client);
+
+ /*
+ * Read and validate the first parameter of the client request. Let the
+ * request-specific protocol routines take care of the remainder.
+ */
+ if (attr_scan(client, ATTR_FLAG_STRICT | ATTR_FLAG_MORE,
+ RECV_ATTR_INT(MAIL_ATTR_NREQ, &command), 0) != 1) {
+ msg_warn("malformed request");
+ status = -1;
+ } else if (command == BOUNCE_CMD_VERP) {
+ status = bounce_verp_proto(service_name, client);
+ } else if (command == BOUNCE_CMD_FLUSH) {
+ status = bounce_notify_proto(service_name, client,
+ bounce_notify_service);
+ } else if (command == BOUNCE_CMD_WARN) {
+ status = bounce_notify_proto(service_name, client,
+ bounce_warn_service);
+ } else if (command == BOUNCE_CMD_TRACE) {
+ status = bounce_notify_proto(service_name, client,
+ bounce_trace_service);
+ } else if (command == BOUNCE_CMD_APPEND) {
+ status = bounce_append_proto(service_name, client);
+ } else if (command == BOUNCE_CMD_ONE) {
+ status = bounce_one_proto(service_name, client);
+ } else {
+ msg_warn("unknown command: %d", command);
+ status = -1;
+ }
+
+ /*
+ * When the request has completed, send the completion status to the
+ * client.
+ */
+ attr_print(client, ATTR_FLAG_NONE,
+ SEND_ATTR_INT(MAIL_ATTR_STATUS, status),
+ ATTR_TYPE_END);
+ vstream_fflush(client);
+
+ /*
+ * When a cleanup trap was set, delete the log file in case of error.
+ * This includes errors while sending the completion status to the
+ * client.
+ */
+ if (bounce_cleanup_path) {
+ if (status || vstream_ferror(client))
+ bounce_cleanup_log();
+ bounce_cleanup_unregister();
+ }
+}
+
+static void load_helper(VSTREAM *stream, void *context)
+{
+ BOUNCE_TEMPLATES *templates = (BOUNCE_TEMPLATES *) context;
+
+ bounce_templates_load(stream, templates);
+}
+
+/* pre_jail_init - pre-jail initialization */
+
+static void pre_jail_init(char *unused_name, char **unused_argv)
+{
+
+ /*
+ * Bundle up a bunch of bounce template information.
+ */
+ bounce_templates = bounce_templates_create();
+
+ /*
+ * Load the alternate message files (if specified) before entering the
+ * chroot jail.
+ */
+ if (*var_bounce_tmpl)
+ load_file(var_bounce_tmpl, load_helper, (void *) bounce_templates);
+}
+
+/* post_jail_init - initialize after entering chroot jail */
+
+static void post_jail_init(char *service_name, char **unused_argv)
+{
+ bounce_hfrom_format = hfrom_format_parse(VAR_HFROM_FORMAT, var_hfrom_format);
+
+ /*
+ * Special case: dump bounce templates. This is not part of the master(5)
+ * public interface. This internal interface is used by the postconf
+ * command. It was implemented before bounce templates were isolated into
+ * modules that could have been called directly.
+ */
+ if (strcmp(service_name, "dump_templates") == 0) {
+ bounce_templates_dump(VSTREAM_OUT, bounce_templates);
+ vstream_fflush(VSTREAM_OUT);
+ exit(0);
+ }
+ if (strcmp(service_name, "expand_templates") == 0) {
+ bounce_templates_expand(VSTREAM_OUT, bounce_templates);
+ vstream_fflush(VSTREAM_OUT);
+ exit(0);
+ }
+
+ /*
+ * Initialize. We're single threaded so we can reuse some memory upon
+ * successive requests.
+ */
+ queue_id = vstring_alloc(10);
+ queue_name = vstring_alloc(10);
+ rcpt_buf = rcpb_create();
+ encoding = vstring_alloc(10);
+ sender = vstring_alloc(10);
+ dsn_envid = vstring_alloc(10);
+ verp_delims = vstring_alloc(10);
+ dsn_buf = dsb_create();
+}
+
+MAIL_VERSION_STAMP_DECLARE;
+
+/* main - the main program */
+
+int main(int argc, char **argv)
+{
+ static const CONFIG_INT_TABLE int_table[] = {
+ VAR_BOUNCE_LIMIT, DEF_BOUNCE_LIMIT, &var_bounce_limit, 1, 0,
+ 0,
+ };
+ static const CONFIG_TIME_TABLE time_table[] = {
+ VAR_MAX_QUEUE_TIME, DEF_MAX_QUEUE_TIME, &var_max_queue_time, 0, 8640000,
+ VAR_DELAY_WARN_TIME, DEF_DELAY_WARN_TIME, &var_delay_warn_time, 0, 0,
+ 0,
+ };
+ static const CONFIG_STR_TABLE str_table[] = {
+ VAR_NOTIFY_CLASSES, DEF_NOTIFY_CLASSES, &var_notify_classes, 0, 0,
+ VAR_BOUNCE_RCPT, DEF_BOUNCE_RCPT, &var_bounce_rcpt, 1, 0,
+ VAR_2BOUNCE_RCPT, DEF_2BOUNCE_RCPT, &var_2bounce_rcpt, 1, 0,
+ VAR_DELAY_RCPT, DEF_DELAY_RCPT, &var_delay_rcpt, 1, 0,
+ VAR_BOUNCE_TMPL, DEF_BOUNCE_TMPL, &var_bounce_tmpl, 0, 0,
+ VAR_HFROM_FORMAT, DEF_HFROM_FORMAT, &var_hfrom_format, 1, 0,
+ 0,
+ };
+ static const CONFIG_NBOOL_TABLE nbool_table[] = {
+ VAR_THREADED_BOUNCE, DEF_THREADED_BOUNCE, &var_threaded_bounce,
+ 0,
+ };
+
+ /*
+ * Fingerprint executables and core dumps.
+ */
+ MAIL_VERSION_STAMP_ALLOCATE;
+
+ /*
+ * Pass control to the single-threaded service skeleton.
+ */
+ single_server_main(argc, argv, bounce_service,
+ CA_MAIL_SERVER_INT_TABLE(int_table),
+ CA_MAIL_SERVER_STR_TABLE(str_table),
+ CA_MAIL_SERVER_TIME_TABLE(time_table),
+ CA_MAIL_SERVER_NBOOL_TABLE(nbool_table),
+ CA_MAIL_SERVER_PRE_INIT(pre_jail_init),
+ CA_MAIL_SERVER_POST_INIT(post_jail_init),
+ CA_MAIL_SERVER_UNLIMITED,
+ 0);
+}