GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/smtpd/smtpd/../pony.c Lines: 0 61 0.0 %
Date: 2017-11-13 Branches: 0 61 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: pony.c,v 1.18 2017/08/13 11:10:30 eric Exp $	*/
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/*
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 * Copyright (c) 2014 Gilles Chehade <gilles@poolp.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/tree.h>
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#include <sys/socket.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <event.h>
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#include <imsg.h>
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#include <inttypes.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <limits.h>
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#include <grp.h>
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#include <vis.h>
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#include "smtpd.h"
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#include "log.h"
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void mda_imsg(struct mproc *, struct imsg *);
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void mta_imsg(struct mproc *, struct imsg *);
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void smtp_imsg(struct mproc *, struct imsg *);
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static void pony_shutdown(void);
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void
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pony_imsg(struct mproc *p, struct imsg *imsg)
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{
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	struct msg	m;
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	int		v;
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	if (imsg == NULL)
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		pony_shutdown();
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	switch (imsg->hdr.type) {
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	case IMSG_CONF_START:
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		return;
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	case IMSG_CONF_END:
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		smtp_configure();
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		return;
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	case IMSG_CTL_VERBOSE:
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		m_msg(&m, imsg);
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		m_get_int(&m, &v);
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		m_end(&m);
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		log_trace_verbose(v);
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		return;
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	case IMSG_CTL_PROFILE:
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		m_msg(&m, imsg);
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		m_get_int(&m, &v);
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		m_end(&m);
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		profiling = v;
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		return;
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	/* smtp imsg */
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	case IMSG_SMTP_DNS_PTR:
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	case IMSG_SMTP_CHECK_SENDER:
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	case IMSG_SMTP_EXPAND_RCPT:
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	case IMSG_SMTP_LOOKUP_HELO:
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	case IMSG_SMTP_AUTHENTICATE:
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	case IMSG_SMTP_TLS_INIT:
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	case IMSG_SMTP_TLS_VERIFY:
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	case IMSG_SMTP_MESSAGE_COMMIT:
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	case IMSG_SMTP_MESSAGE_CREATE:
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	case IMSG_SMTP_MESSAGE_OPEN:
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	case IMSG_QUEUE_ENVELOPE_SUBMIT:
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	case IMSG_QUEUE_ENVELOPE_COMMIT:
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	case IMSG_QUEUE_SMTP_SESSION:
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	case IMSG_CTL_SMTP_SESSION:
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	case IMSG_CTL_PAUSE_SMTP:
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	case IMSG_CTL_RESUME_SMTP:
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		smtp_imsg(p, imsg);
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		return;
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        /* mta imsg */
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	case IMSG_QUEUE_TRANSFER:
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	case IMSG_MTA_OPEN_MESSAGE:
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	case IMSG_MTA_LOOKUP_CREDENTIALS:
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	case IMSG_MTA_LOOKUP_SOURCE:
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	case IMSG_MTA_LOOKUP_HELO:
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	case IMSG_MTA_DNS_HOST:
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	case IMSG_MTA_DNS_HOST_END:
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	case IMSG_MTA_DNS_MX_PREFERENCE:
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	case IMSG_MTA_DNS_PTR:
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	case IMSG_MTA_TLS_INIT:
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	case IMSG_MTA_TLS_VERIFY:
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	case IMSG_CTL_RESUME_ROUTE:
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	case IMSG_CTL_MTA_SHOW_HOSTS:
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	case IMSG_CTL_MTA_SHOW_RELAYS:
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	case IMSG_CTL_MTA_SHOW_ROUTES:
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	case IMSG_CTL_MTA_SHOW_HOSTSTATS:
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	case IMSG_CTL_MTA_BLOCK:
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	case IMSG_CTL_MTA_UNBLOCK:
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	case IMSG_CTL_MTA_SHOW_BLOCK:
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		mta_imsg(p, imsg);
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		return;
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        /* mda imsg */
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	case IMSG_MDA_LOOKUP_USERINFO:
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	case IMSG_QUEUE_DELIVER:
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	case IMSG_MDA_OPEN_MESSAGE:
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	case IMSG_MDA_FORK:
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	case IMSG_MDA_DONE:
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		mda_imsg(p, imsg);
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		return;
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	default:
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		break;
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	}
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	errx(1, "session_imsg: unexpected %s imsg", imsg_to_str(imsg->hdr.type));
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}
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static void
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pony_shutdown(void)
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{
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	log_debug("debug: pony agent exiting");
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	_exit(0);
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}
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int
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pony(void)
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{
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	struct passwd	*pw;
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	mda_postfork();
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	mta_postfork();
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	smtp_postfork();
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	/* do not purge listeners and pki, they are purged
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	 * in smtp_configure()
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	 */
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	purge_config(PURGE_TABLES|PURGE_RULES);
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	if ((pw = getpwnam(SMTPD_USER)) == NULL)
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		fatalx("unknown user " SMTPD_USER);
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	if (chroot(PATH_CHROOT) == -1)
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		fatal("pony: chroot");
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	if (chdir("/") == -1)
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		fatal("pony: chdir(\"/\")");
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	config_process(PROC_PONY);
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	if (setgroups(1, &pw->pw_gid) ||
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	    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
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	    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
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		fatal("pony: cannot drop privileges");
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	imsg_callback = pony_imsg;
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	event_init();
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	mda_postprivdrop();
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	mta_postprivdrop();
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	smtp_postprivdrop();
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	signal(SIGINT, SIG_IGN);
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	signal(SIGTERM, SIG_IGN);
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	signal(SIGPIPE, SIG_IGN);
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	signal(SIGHUP, SIG_IGN);
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	config_peer(PROC_PARENT);
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	config_peer(PROC_QUEUE);
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	config_peer(PROC_LKA);
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	config_peer(PROC_CONTROL);
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	config_peer(PROC_CA);
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	ca_engine_init();
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	if (pledge("stdio inet unix recvfd sendfd flock rpath cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	event_dispatch();
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	fatalx("exited event loop");
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	return (0);
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}