pid_t
ca(void)
{
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
switch (pid = fork()) {
case -1:
fatal("ca: cannot fork");
case 0:
post_fork(PROC_CA);
break;
default:
return (pid);
}
purge_config(PURGE_LISTENERS|PURGE_TABLES|PURGE_RULES);
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
if (chroot(PATH_CHROOT) == -1)
fatal("ca: chroot");
if (chdir("/") == -1)
fatal("ca: chdir(\"/\")");
config_process(PROC_CA);
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("ca: cannot drop privileges");
imsg_callback = ca_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, ca_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, ca_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
config_peer(PROC_CONTROL);
config_peer(PROC_PARENT);
config_peer(PROC_PONY);
config_done();
/* Ignore them until we get our config */
mproc_disable(p_pony);
if (event_dispatch() < 0)
fatal("event_dispatch");
ca_shutdown();
return (0);
}
int
control(void)
{
struct passwd *pw;
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
stat_backend = env->sc_stat;
stat_backend->init();
if (chroot(PATH_CHROOT) == -1)
fatal("control: chroot");
if (chdir("/") == -1)
fatal("control: chdir(\"/\")");
config_process(PROC_CONTROL);
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("control: cannot drop privileges");
imsg_callback = control_imsg;
event_init();
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
tree_init(&ctl_conns);
tree_init(&ctl_count);
memset(&digest, 0, sizeof digest);
digest.startup = time(NULL);
config_peer(PROC_SCHEDULER);
config_peer(PROC_QUEUE);
config_peer(PROC_PARENT);
config_peer(PROC_LKA);
config_peer(PROC_PONY);
config_peer(PROC_CA);
control_listen();
if (pledge("stdio unix recvfd sendfd", NULL) == -1)
err(1, "pledge");
event_dispatch();
fatalx("exited event loop");
return (0);
}
pid_t
queue(void)
{
pid_t pid;
struct passwd *pw;
struct timeval tv;
struct event ev_qload;
struct event ev_sigint;
struct event ev_sigterm;
switch (pid = fork()) {
case -1:
fatal("queue: cannot fork");
case 0:
post_fork(PROC_QUEUE);
break;
default:
return (pid);
}
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_QUEUE_USER)) == NULL)
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
env->sc_queue_flags |= QUEUE_EVPCACHE;
env->sc_queue_evpcache_size = 1024;
if (chroot(PATH_SPOOL) == -1)
fatal("queue: chroot");
if (chdir("/") == -1)
fatal("queue: chdir(\"/\")");
config_process(PROC_QUEUE);
if (env->sc_queue_flags & QUEUE_COMPRESSION)
log_info("queue: queue compression enabled");
if (env->sc_queue_key) {
if (! crypto_setup(env->sc_queue_key, strlen(env->sc_queue_key)))
fatalx("crypto_setup: invalid key for queue encryption");
log_info("queue: queue encryption enabled");
}
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("queue: cannot drop privileges");
imsg_callback = queue_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, queue_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, queue_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
config_peer(PROC_PARENT);
config_peer(PROC_CONTROL);
config_peer(PROC_LKA);
config_peer(PROC_SCHEDULER);
config_peer(PROC_PONY);
config_done();
/* setup queue loading task */
evtimer_set(&ev_qload, queue_timeout, &ev_qload);
tv.tv_sec = 0;
tv.tv_usec = 10;
evtimer_add(&ev_qload, &tv);
if (event_dispatch() < 0)
fatal("event_dispatch");
queue_shutdown();
return (0);
}
pid_t
control(void)
{
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
switch (pid = fork()) {
case -1:
fatal("control: cannot fork");
case 0:
post_fork(PROC_CONTROL);
break;
default:
return (pid);
}
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
stat_backend = env->sc_stat;
stat_backend->init();
if (chroot(PATH_CHROOT) == -1)
fatal("control: chroot");
if (chdir("/") == -1)
fatal("control: chdir(\"/\")");
config_process(PROC_CONTROL);
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("control: cannot drop privileges");
imsg_callback = control_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, control_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, control_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
tree_init(&ctl_conns);
tree_init(&ctl_count);
memset(&digest, 0, sizeof digest);
digest.startup = time(NULL);
config_peer(PROC_SCHEDULER);
config_peer(PROC_QUEUE);
config_peer(PROC_PARENT);
config_peer(PROC_LKA);
config_peer(PROC_PONY);
config_peer(PROC_CA);
config_done();
control_listen();
if (event_dispatch() < 0)
fatal("event_dispatch");
control_shutdown();
return (0);
}
pid_t
lka(void)
{
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
struct event ev_sigchld;
switch (pid = fork()) {
case -1:
fatal("lka: cannot fork");
case 0:
break;
default:
return (pid);
}
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
config_process(PROC_LKA);
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("lka: cannot drop privileges");
imsg_callback = lka_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, lka_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, lka_sig_handler, NULL);
signal_set(&ev_sigchld, SIGCHLD, lka_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal_add(&ev_sigchld, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
/*
* lka opens all kinds of files and sockets, so bump the limit to max.
* XXX: need to analyse the exact hard limit.
*/
fdlimit(1.0);
config_peer(PROC_PARENT);
config_peer(PROC_QUEUE);
config_peer(PROC_SMTP);
config_peer(PROC_MDA);
config_peer(PROC_MTA);
config_peer(PROC_CONTROL);
config_done();
/* Ignore them until we get our config */
mproc_disable(p_mda);
mproc_disable(p_mta);
mproc_disable(p_smtp);
if (event_dispatch() < 0)
fatal("event_dispatch");
lka_shutdown();
return (0);
}
pid_t
pony(void)
{
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
switch (pid = fork()) {
case -1:
fatal("pony: cannot fork");
case 0:
post_fork(PROC_PONY);
break;
default:
return (pid);
}
mda_postfork();
mta_postfork();
smtp_postfork();
filter_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_set(&ev_sigint, SIGINT, pony_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, pony_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
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);
config_done();
ca_engine_init();
if (event_dispatch() < 0)
fatal("event_dispatch");
pony_shutdown();
return (0);
}
pid_t
mfa(void)
{
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
struct event ev_sigchld;
switch (pid = fork()) {
case -1:
fatal("filter: cannot fork");
case 0:
break;
default:
return (pid);
}
mfa_filter_prepare();
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
config_process(PROC_MFA);
if (chroot(PATH_CHROOT) == -1)
fatal("scheduler: chroot");
if (chdir("/") == -1)
fatal("scheduler: chdir(\"/\")");
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("filter: cannot drop privileges");
imsg_callback = mfa_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, mfa_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, mfa_sig_handler, NULL);
signal_set(&ev_sigchld, SIGCHLD, mfa_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal_add(&ev_sigchld, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
config_peer(PROC_PARENT);
config_peer(PROC_SMTP);
config_peer(PROC_CONTROL);
config_done();
mproc_disable(p_smtp);
if (event_dispatch() < 0)
fatal("event_dispatch");
mfa_shutdown();
return (0);
}
int
queue(void)
{
struct passwd *pw;
struct timeval tv;
struct event ev_qload;
purge_config(PURGE_EVERYTHING);
if ((pw = getpwnam(SMTPD_QUEUE_USER)) == NULL)
if ((pw = getpwnam(SMTPD_USER)) == NULL)
fatalx("unknown user " SMTPD_USER);
env->sc_queue_flags |= QUEUE_EVPCACHE;
env->sc_queue_evpcache_size = 1024;
if (chroot(PATH_SPOOL) == -1)
fatal("queue: chroot");
if (chdir("/") == -1)
fatal("queue: chdir(\"/\")");
config_process(PROC_QUEUE);
if (env->sc_queue_flags & QUEUE_COMPRESSION)
log_info("queue: queue compression enabled");
if (env->sc_queue_key) {
if (!crypto_setup(env->sc_queue_key, strlen(env->sc_queue_key)))
fatalx("crypto_setup: invalid key for queue encryption");
log_info("queue: queue encryption enabled");
}
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("queue: cannot drop privileges");
imsg_callback = queue_imsg;
event_init();
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
config_peer(PROC_PARENT);
config_peer(PROC_CONTROL);
config_peer(PROC_LKA);
config_peer(PROC_SCHEDULER);
config_peer(PROC_PONY);
/* setup queue loading task */
evtimer_set(&ev_qload, queue_timeout, &ev_qload);
tv.tv_sec = 0;
tv.tv_usec = 10;
evtimer_add(&ev_qload, &tv);
if (pledge("stdio rpath wpath cpath flock recvfd sendfd", NULL) == -1)
err(1, "pledge");
event_dispatch();
fatalx("exited event loop");
return (0);
}
pid_t
control(void)
{
struct sockaddr_un sun;
int fd;
mode_t old_umask;
pid_t pid;
struct passwd *pw;
struct event ev_sigint;
struct event ev_sigterm;
switch (pid = fork()) {
case -1:
fatal("control: cannot fork");
case 0:
break;
default:
return (pid);
}
purge_config(PURGE_EVERYTHING);
pw = env->sc_pw;
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
fatal("control: socket");
bzero(&sun, sizeof(sun));
sun.sun_family = AF_UNIX;
if (strlcpy(sun.sun_path, SMTPD_SOCKET,
sizeof(sun.sun_path)) >= sizeof(sun.sun_path))
fatal("control: socket name too long");
if (connect(fd, (struct sockaddr *)&sun, sizeof(sun)) == 0)
fatalx("control socket already listening");
if (unlink(SMTPD_SOCKET) == -1)
if (errno != ENOENT)
fatal("control: cannot unlink socket");
old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
(void)umask(old_umask);
fatal("control: bind");
}
(void)umask(old_umask);
if (chmod(SMTPD_SOCKET,
S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) == -1) {
(void)unlink(SMTPD_SOCKET);
fatal("control: chmod");
}
session_socket_blockmode(fd, BM_NONBLOCK);
control_state.fd = fd;
stat_backend = env->sc_stat;
stat_backend->init();
if (chroot(PATH_CHROOT) == -1)
fatal("control: chroot");
if (chdir("/") == -1)
fatal("control: chdir(\"/\")");
config_process(PROC_CONTROL);
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("control: cannot drop privileges");
imsg_callback = control_imsg;
event_init();
signal_set(&ev_sigint, SIGINT, control_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, control_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
tree_init(&ctl_conns);
bzero(&digest, sizeof digest);
digest.startup = time(NULL);
config_peer(PROC_SCHEDULER);
config_peer(PROC_QUEUE);
config_peer(PROC_SMTP);
config_peer(PROC_MFA);
config_peer(PROC_PARENT);
config_peer(PROC_LKA);
config_peer(PROC_MDA);
config_peer(PROC_MTA);
config_done();
control_listen();
if (event_dispatch() < 0)
fatal("event_dispatch");
control_shutdown();
return (0);
}