Revert "moving smtpd to usr.sbin/smtpd to ease cherry-picking of upstream"

This reverts commit 90620a574d8824e5b2aa18709f2d5b5b6bb3cb38.

1 files changed, 212 insertions, 0 deletions

diff --git a/smtpd/pony.c b/smtpd/pony.c
new file mode 100644
index 00000000..1865b339
--- /dev/null
+++ b/smtpd/pony.c
@@ -0,0 +1,212 @@
+/*	$OpenBSD: pony.c,v 1.27 2019/06/13 11:45:35 eric Exp $	*/
+
+/*
+ * Copyright (c) 2014 Gilles Chehade <gilles@poolp.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/tree.h>
+#include <sys/socket.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <event.h>
+#include <imsg.h>
+#include <inttypes.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <limits.h>
+#include <grp.h>
+
+#include "smtpd.h"
+#include "log.h"
+
+void mda_imsg(struct mproc *, struct imsg *);
+void mta_imsg(struct mproc *, struct imsg *);
+void smtp_imsg(struct mproc *, struct imsg *);
+
+static void pony_shutdown(void);
+
+void
+pony_imsg(struct mproc *p, struct imsg *imsg)
+{
+	struct msg	m;
+	int		v;
+
+	if (imsg == NULL)
+		pony_shutdown();
+
+	switch (imsg->hdr.type) {
+
+	case IMSG_GETADDRINFO:
+	case IMSG_GETADDRINFO_END:
+	case IMSG_GETNAMEINFO:
+	case IMSG_RES_QUERY:
+		resolver_dispatch_result(p, imsg);
+		return;
+
+	case IMSG_CERT_INIT:
+	case IMSG_CERT_VERIFY:
+		cert_dispatch_result(p, imsg);
+		return;
+
+	case IMSG_CONF_START:
+		return;
+	case IMSG_CONF_END:
+		smtp_configure();
+		return;
+	case IMSG_CTL_VERBOSE:
+		m_msg(&m, imsg);
+		m_get_int(&m, &v);
+		m_end(&m);
+		log_trace_verbose(v);
+		return;
+	case IMSG_CTL_PROFILE:
+		m_msg(&m, imsg);
+		m_get_int(&m, &v);
+		m_end(&m);
+		profiling = v;
+		return;
+
+	/* smtp imsg */
+	case IMSG_SMTP_CHECK_SENDER:
+	case IMSG_SMTP_EXPAND_RCPT:
+	case IMSG_SMTP_LOOKUP_HELO:
+	case IMSG_SMTP_AUTHENTICATE:
+	case IMSG_SMTP_MESSAGE_COMMIT:
+	case IMSG_SMTP_MESSAGE_CREATE:
+	case IMSG_SMTP_MESSAGE_OPEN:
+	case IMSG_FILTER_SMTP_PROTOCOL:
+	case IMSG_FILTER_SMTP_DATA_BEGIN:
+	case IMSG_QUEUE_ENVELOPE_SUBMIT:
+	case IMSG_QUEUE_ENVELOPE_COMMIT:
+	case IMSG_QUEUE_SMTP_SESSION:
+	case IMSG_CTL_SMTP_SESSION:
+	case IMSG_CTL_PAUSE_SMTP:
+	case IMSG_CTL_RESUME_SMTP:
+		smtp_imsg(p, imsg);
+		return;
+
+        /* mta imsg */
+	case IMSG_QUEUE_TRANSFER:
+	case IMSG_MTA_OPEN_MESSAGE:
+	case IMSG_MTA_LOOKUP_CREDENTIALS:
+	case IMSG_MTA_LOOKUP_SMARTHOST:
+	case IMSG_MTA_LOOKUP_SOURCE:
+	case IMSG_MTA_LOOKUP_HELO:
+	case IMSG_MTA_DNS_HOST:
+	case IMSG_MTA_DNS_HOST_END:
+	case IMSG_MTA_DNS_MX_PREFERENCE:
+	case IMSG_CTL_RESUME_ROUTE:
+	case IMSG_CTL_MTA_SHOW_HOSTS:
+	case IMSG_CTL_MTA_SHOW_RELAYS:
+	case IMSG_CTL_MTA_SHOW_ROUTES:
+	case IMSG_CTL_MTA_SHOW_HOSTSTATS:
+	case IMSG_CTL_MTA_BLOCK:
+	case IMSG_CTL_MTA_UNBLOCK:
+	case IMSG_CTL_MTA_SHOW_BLOCK:
+		mta_imsg(p, imsg);
+		return;
+
+        /* mda imsg */
+	case IMSG_MDA_LOOKUP_USERINFO:
+	case IMSG_QUEUE_DELIVER:
+	case IMSG_MDA_OPEN_MESSAGE:
+	case IMSG_MDA_FORK:
+	case IMSG_MDA_DONE:
+		mda_imsg(p, imsg);
+		return;
+	default:
+		break;
+	}
+
+	errx(1, "session_imsg: unexpected %s imsg", imsg_to_str(imsg->hdr.type));
+}
+
+static void
+pony_shutdown(void)
+{
+	log_debug("debug: pony agent exiting");
+	_exit(0);
+}
+
+int
+pony(void)
+{
+	struct passwd	*pw;
+
+	mda_postfork();
+	mta_postfork();
+	smtp_postfork();
+
+	/* do not purge listeners and pki, they are purged
+	 * in smtp_configure()
+	 */
+	purge_config(PURGE_TABLES|PURGE_RULES);
+
+	if ((pw = getpwnam(SMTPD_USER)) == NULL)
+		fatalx("unknown user " SMTPD_USER);
+
+	if (chroot(PATH_CHROOT) == -1)
+		fatal("pony: chroot");
+	if (chdir("/") == -1)
+		fatal("pony: chdir(\"/\")");
+
+	config_process(PROC_PONY);
+
+	if (setgroups(1, &pw->pw_gid) ||
+	    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
+	    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
+		fatal("pony: cannot drop privileges");
+
+	imsg_callback = pony_imsg;
+	event_init();
+
+	mda_postprivdrop();
+	mta_postprivdrop();
+	smtp_postprivdrop();
+
+	signal(SIGINT, SIG_IGN);
+	signal(SIGTERM, SIG_IGN);
+	signal(SIGPIPE, SIG_IGN);
+	signal(SIGHUP, SIG_IGN);
+
+	config_peer(PROC_PARENT);
+	config_peer(PROC_QUEUE);
+	config_peer(PROC_LKA);
+	config_peer(PROC_CONTROL);
+	config_peer(PROC_CA);
+
+	ca_engine_init();
+
+#if HAVE_PLEDGE
+	if (pledge("stdio inet unix recvfd sendfd", NULL) == -1)
+		err(1, "pledge");
+#endif
+
+	event_dispatch();
+	fatalx("exited event loop");
+
+	return (0);
+}