static void
queue_timeout(int fd, short event, void *p)
{
static uint32_t msgid = 0;
struct envelope evp;
struct event *ev = p;
struct timeval tv;
int r;
r = queue_envelope_walk(&evp);
if (r == -1) {
if (msgid) {
m_create(p_scheduler, IMSG_QUEUE_MESSAGE_COMMIT,
0, 0, -1);
m_add_msgid(p_scheduler, msgid);
m_close(p_scheduler);
}
log_debug("debug: queue: done loading queue into scheduler");
return;
}
if (r) {
if (msgid && evpid_to_msgid(evp.id) != msgid) {
m_create(p_scheduler, IMSG_QUEUE_MESSAGE_COMMIT,
0, 0, -1);
m_add_msgid(p_scheduler, msgid);
m_close(p_scheduler);
}
msgid = evpid_to_msgid(evp.id);
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_SUBMIT, 0, 0, -1);
m_add_envelope(p_scheduler, &evp);
m_close(p_scheduler);
}
tv.tv_sec = 0;
tv.tv_usec = 10;
evtimer_add(ev, &tv);
}
static void
queue_bounce(struct envelope *e, struct delivery_bounce *d)
{
struct envelope b;
b = *e;
b.type = D_BOUNCE;
b.agent.bounce = *d;
b.retry = 0;
b.lasttry = 0;
b.creation = time(NULL);
b.expire = 3600 * 24 * 7;
if (e->dsn_notify & DSN_NEVER)
return;
if (b.id == 0)
log_warnx("warn: queue_bounce: evpid=0");
if (evpid_to_msgid(b.id) == 0)
log_warnx("warn: queue_bounce: msgid=0, evpid=%016"PRIx64,
b.id);
if (e->type == D_BOUNCE) {
log_warnx("warn: queue: double bounce!");
} else if (e->sender.user[0] == '\0') {
log_warnx("warn: queue: no return path!");
} else if (!queue_envelope_create(&b)) {
log_warnx("warn: queue: cannot bounce!");
} else {
log_debug("debug: queue: bouncing evp:%016" PRIx64
" as evp:%016" PRIx64, e->id, b.id);
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_SUBMIT, 0, 0, -1);
m_add_envelope(p_scheduler, &b);
m_close(p_scheduler);
m_create(p_scheduler, IMSG_QUEUE_MESSAGE_COMMIT, 0, 0, -1);
m_add_msgid(p_scheduler, evpid_to_msgid(b.id));
m_close(p_scheduler);
stat_increment("queue.bounce", 1);
}
}
static void
queue_msgid_walk(int fd, short event, void *arg)
{
struct envelope evp;
struct timeval tv;
struct msg_walkinfo *wi = arg;
int r;
r = queue_message_walk(&evp, wi->msgid, &wi->done, &wi->data);
if (r == -1) {
if (wi->n_evp) {
m_create(p_scheduler, IMSG_QUEUE_DISCOVER_MSGID,
0, 0, -1);
m_add_msgid(p_scheduler, wi->msgid);
m_close(p_scheduler);
}
m_compose(p_control, IMSG_CTL_DISCOVER_MSGID, wi->peerid, 0, -1,
&wi->n_evp, sizeof wi->n_evp);
evtimer_del(&wi->ev);
free(wi);
return;
}
if (r) {
m_create(p_scheduler, IMSG_QUEUE_DISCOVER_EVPID, 0, 0, -1);
m_add_envelope(p_scheduler, &evp);
m_close(p_scheduler);
wi->n_evp += 1;
}
tv.tv_sec = 0;
tv.tv_usec = 10;
evtimer_set(&wi->ev, queue_msgid_walk, wi);
evtimer_add(&wi->ev, &tv);
}
static void
queue_imsg(struct mproc *p, struct imsg *imsg)
{
struct delivery_bounce bounce;
struct bounce_req_msg *req_bounce;
struct envelope evp;
struct msg m;
const char *reason;
uint64_t reqid, evpid, holdq;
uint32_t msgid;
time_t nexttry;
int fd, mta_ext, ret, v, flags, code;
memset(&bounce, 0, sizeof(struct delivery_bounce));
if (p->proc == PROC_PONY) {
switch (imsg->hdr.type) {
case IMSG_SMTP_MESSAGE_CREATE:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_end(&m);
ret = queue_message_create(&msgid);
m_create(p, IMSG_SMTP_MESSAGE_CREATE, 0, 0, -1);
m_add_id(p, reqid);
if (ret == 0)
m_add_int(p, 0);
else {
m_add_int(p, 1);
m_add_msgid(p, msgid);
}
m_close(p);
return;
case IMSG_SMTP_MESSAGE_ROLLBACK:
m_msg(&m, imsg);
m_get_msgid(&m, &msgid);
m_end(&m);
queue_message_delete(msgid);
m_create(p_scheduler, IMSG_QUEUE_MESSAGE_ROLLBACK,
0, 0, -1);
m_add_msgid(p_scheduler, msgid);
m_close(p_scheduler);
return;
case IMSG_SMTP_MESSAGE_COMMIT:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_get_msgid(&m, &msgid);
m_end(&m);
ret = queue_message_commit(msgid);
m_create(p, IMSG_SMTP_MESSAGE_COMMIT, 0, 0, -1);
m_add_id(p, reqid);
m_add_int(p, (ret == 0) ? 0 : 1);
m_close(p);
if (ret) {
m_create(p_scheduler, IMSG_QUEUE_MESSAGE_COMMIT,
0, 0, -1);
m_add_msgid(p_scheduler, msgid);
m_close(p_scheduler);
}
return;
case IMSG_SMTP_MESSAGE_OPEN:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_get_msgid(&m, &msgid);
m_end(&m);
fd = queue_message_fd_rw(msgid);
m_create(p, IMSG_SMTP_MESSAGE_OPEN, 0, 0, fd);
m_add_id(p, reqid);
m_add_int(p, (fd == -1) ? 0 : 1);
m_close(p);
return;
case IMSG_QUEUE_SMTP_SESSION:
bounce_fd(imsg->fd);
return;
}
}
if (p->proc == PROC_LKA) {
switch (imsg->hdr.type) {
case IMSG_LKA_ENVELOPE_SUBMIT:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_get_envelope(&m, &evp);
m_end(&m);
if (evp.id == 0)
log_warnx("warn: imsg_queue_submit_envelope: evpid=0");
if (evpid_to_msgid(evp.id) == 0)
log_warnx("warn: imsg_queue_submit_envelope: msgid=0, "
"evpid=%016"PRIx64, evp.id);
ret = queue_envelope_create(&evp);
m_create(p_pony, IMSG_QUEUE_ENVELOPE_SUBMIT, 0, 0, -1);
m_add_id(p_pony, reqid);
if (ret == 0)
m_add_int(p_pony, 0);
else {
m_add_int(p_pony, 1);
m_add_evpid(p_pony, evp.id);
}
m_close(p_pony);
if (ret) {
m_create(p_scheduler,
IMSG_QUEUE_ENVELOPE_SUBMIT, 0, 0, -1);
m_add_envelope(p_scheduler, &evp);
m_close(p_scheduler);
}
return;
case IMSG_LKA_ENVELOPE_COMMIT:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_end(&m);
m_create(p_pony, IMSG_QUEUE_ENVELOPE_COMMIT, 0, 0, -1);
m_add_id(p_pony, reqid);
m_add_int(p_pony, 1);
m_close(p_pony);
return;
}
}
if (p->proc == PROC_SCHEDULER) {
switch (imsg->hdr.type) {
case IMSG_SCHED_ENVELOPE_REMOVE:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
/* already removed by scheduler */
if (queue_envelope_load(evpid, &evp) == 0)
return;
queue_log(&evp, "Remove", "Removed by administrator");
queue_envelope_delete(evpid);
return;
case IMSG_SCHED_ENVELOPE_EXPIRE:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
/* already removed by scheduler*/
if (queue_envelope_load(evpid, &evp) == 0)
return;
bounce.type = B_ERROR;
envelope_set_errormsg(&evp, "Envelope expired");
envelope_set_esc_class(&evp, ESC_STATUS_TEMPFAIL);
envelope_set_esc_code(&evp, ESC_DELIVERY_TIME_EXPIRED);
queue_bounce(&evp, &bounce);
queue_log(&evp, "Expire", "Envelope expired");
queue_envelope_delete(evpid);
return;
case IMSG_SCHED_ENVELOPE_BOUNCE:
req_bounce = imsg->data;
evpid = req_bounce->evpid;
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: bounce: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 0); /* not in-flight */
m_close(p_scheduler);
return;
}
queue_bounce(&evp, &req_bounce->bounce);
evp.lastbounce = req_bounce->timestamp;
if (!queue_envelope_update(&evp))
log_warnx("warn: could not update envelope %016"PRIx64, evpid);
return;
case IMSG_SCHED_ENVELOPE_DELIVER:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: deliver: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 1); /* in-flight */
m_close(p_scheduler);
return;
}
evp.lasttry = time(NULL);
m_create(p_pony, IMSG_QUEUE_DELIVER, 0, 0, -1);
m_add_envelope(p_pony, &evp);
m_close(p_pony);
return;
case IMSG_SCHED_ENVELOPE_INJECT:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
bounce_add(evpid);
return;
case IMSG_SCHED_ENVELOPE_TRANSFER:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 1); /* in-flight */
m_close(p_scheduler);
return;
}
evp.lasttry = time(NULL);
m_create(p_pony, IMSG_QUEUE_TRANSFER, 0, 0, -1);
m_add_envelope(p_pony, &evp);
m_close(p_pony);
return;
case IMSG_CTL_LIST_ENVELOPES:
if (imsg->hdr.len == sizeof imsg->hdr) {
m_forward(p_control, imsg);
return;
}
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_get_int(&m, &flags);
m_get_time(&m, &nexttry);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0)
return; /* Envelope is gone, drop it */
/*
* XXX consistency: The envelope might already be on
* its way back to the scheduler. We need to detect
* this properly and report that state.
*/
evp.flags |= flags;
/* In the past if running or runnable */
evp.nexttry = nexttry;
if (flags & EF_INFLIGHT) {
/*
* Not exactly correct but pretty close: The
* value is not recorded on the envelope unless
* a tempfail occurs.
*/
evp.lasttry = nexttry;
}
m_compose(p_control, IMSG_CTL_LIST_ENVELOPES,
imsg->hdr.peerid, 0, -1, &evp, sizeof evp);
return;
}
}
if (p->proc == PROC_PONY) {
switch (imsg->hdr.type) {
case IMSG_MDA_OPEN_MESSAGE:
case IMSG_MTA_OPEN_MESSAGE:
m_msg(&m, imsg);
m_get_id(&m, &reqid);
m_get_msgid(&m, &msgid);
m_end(&m);
fd = queue_message_fd_r(msgid);
m_create(p, imsg->hdr.type, 0, 0, fd);
m_add_id(p, reqid);
m_close(p);
return;
case IMSG_MDA_DELIVERY_OK:
case IMSG_MTA_DELIVERY_OK:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
if (imsg->hdr.type == IMSG_MTA_DELIVERY_OK)
m_get_int(&m, &mta_ext);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warn("queue: dsn: failed to load envelope");
return;
}
if (evp.dsn_notify & DSN_SUCCESS) {
bounce.type = B_DSN;
bounce.dsn_ret = evp.dsn_ret;
if (imsg->hdr.type == IMSG_MDA_DELIVERY_OK)
queue_bounce(&evp, &bounce);
else if (imsg->hdr.type == IMSG_MTA_DELIVERY_OK &&
(mta_ext & MTA_EXT_DSN) == 0) {
bounce.mta_without_dsn = 1;
queue_bounce(&evp, &bounce);
}
}
queue_envelope_delete(evpid);
m_create(p_scheduler, IMSG_QUEUE_DELIVERY_OK, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_close(p_scheduler);
return;
case IMSG_MDA_DELIVERY_TEMPFAIL:
case IMSG_MTA_DELIVERY_TEMPFAIL:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_get_string(&m, &reason);
m_get_int(&m, &code);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: tempfail: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 1); /* in-flight */
m_close(p_scheduler);
return;
}
envelope_set_errormsg(&evp, "%s", reason);
envelope_set_esc_class(&evp, ESC_STATUS_TEMPFAIL);
envelope_set_esc_code(&evp, code);
evp.retry++;
if (!queue_envelope_update(&evp))
log_warnx("warn: could not update envelope %016"PRIx64, evpid);
m_create(p_scheduler, IMSG_QUEUE_DELIVERY_TEMPFAIL, 0, 0, -1);
m_add_envelope(p_scheduler, &evp);
m_close(p_scheduler);
return;
case IMSG_MDA_DELIVERY_PERMFAIL:
case IMSG_MTA_DELIVERY_PERMFAIL:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_get_string(&m, &reason);
m_get_int(&m, &code);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: permfail: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 1); /* in-flight */
m_close(p_scheduler);
return;
}
bounce.type = B_ERROR;
envelope_set_errormsg(&evp, "%s", reason);
envelope_set_esc_class(&evp, ESC_STATUS_PERMFAIL);
envelope_set_esc_code(&evp, code);
queue_bounce(&evp, &bounce);
queue_envelope_delete(evpid);
m_create(p_scheduler, IMSG_QUEUE_DELIVERY_PERMFAIL, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_close(p_scheduler);
return;
case IMSG_MDA_DELIVERY_LOOP:
case IMSG_MTA_DELIVERY_LOOP:
m_msg(&m, imsg);
m_get_evpid(&m, &evpid);
m_end(&m);
if (queue_envelope_load(evpid, &evp) == 0) {
log_warnx("queue: loop: failed to load envelope");
m_create(p_scheduler, IMSG_QUEUE_ENVELOPE_REMOVE, 0, 0, -1);
m_add_evpid(p_scheduler, evpid);
m_add_u32(p_scheduler, 1); /* in-flight */
m_close(p_scheduler);
return;
}
envelope_set_errormsg(&evp, "%s", "Loop detected");
envelope_set_esc_class(&evp, ESC_STATUS_TEMPFAIL);
envelope_set_esc_code(&evp, ESC_ROUTING_LOOP_DETECTED);
bounce.type = B_ERROR;
queue_bounce(&evp, &bounce);
queue_envelope_delete(evp.id);
m_create(p_scheduler, IMSG_QUEUE_DELIVERY_LOOP, 0, 0, -1);
m_add_evpid(p_scheduler, evp.id);
m_close(p_scheduler);
return;
case IMSG_MTA_DELIVERY_HOLD:
case IMSG_MDA_DELIVERY_HOLD:
imsg->hdr.type = IMSG_QUEUE_HOLDQ_HOLD;
m_forward(p_scheduler, imsg);
return;
case IMSG_MTA_SCHEDULE:
imsg->hdr.type = IMSG_QUEUE_ENVELOPE_SCHEDULE;
m_forward(p_scheduler, imsg);
return;
case IMSG_MTA_HOLDQ_RELEASE:
case IMSG_MDA_HOLDQ_RELEASE:
m_msg(&m, imsg);
m_get_id(&m, &holdq);
m_get_int(&m, &v);
m_end(&m);
m_create(p_scheduler, IMSG_QUEUE_HOLDQ_RELEASE, 0, 0, -1);
if (imsg->hdr.type == IMSG_MTA_HOLDQ_RELEASE)
m_add_int(p_scheduler, D_MTA);
else
m_add_int(p_scheduler, D_MDA);
m_add_id(p_scheduler, holdq);
m_add_int(p_scheduler, v);
m_close(p_scheduler);
return;
}
}
if (p->proc == PROC_CONTROL) {
switch (imsg->hdr.type) {
case IMSG_CTL_PAUSE_MDA:
case IMSG_CTL_PAUSE_MTA:
case IMSG_CTL_RESUME_MDA:
case IMSG_CTL_RESUME_MTA:
m_forward(p_scheduler, imsg);
return;
}
}
if (p->proc == PROC_PARENT) {
switch (imsg->hdr.type) {
case IMSG_CTL_VERBOSE:
m_msg(&m, imsg);
m_get_int(&m, &v);
m_end(&m);
log_verbose(v);
m_forward(p_scheduler, imsg);
return;
case IMSG_CTL_PROFILE:
m_msg(&m, imsg);
m_get_int(&m, &v);
m_end(&m);
profiling = v;
return;
}
}
errx(1, "queue_imsg: unexpected %s imsg", imsg_to_str(imsg->hdr.type));
}
/* ARGSUSED */
static void
control_dispatch_ext(struct mproc *p, struct imsg *imsg)
{
struct sockaddr_storage ss;
struct ctl_conn *c;
int v;
struct stat_kv *kvp;
char *key;
struct stat_value val;
size_t len;
uint64_t evpid;
uint32_t msgid;
c = p->data;
if (imsg == NULL) {
control_close(c);
return;
}
if (imsg->hdr.peerid != IMSG_VERSION) {
m_compose(p, IMSG_CTL_FAIL, IMSG_VERSION, 0, -1, NULL, 0);
return;
}
switch (imsg->hdr.type) {
case IMSG_CTL_SMTP_SESSION:
if (env->sc_flags & (SMTPD_SMTP_PAUSED | SMTPD_EXITING)) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
m_compose(p_pony, IMSG_CTL_SMTP_SESSION, c->id, 0, -1,
&c->euid, sizeof(c->euid));
return;
case IMSG_CTL_GET_DIGEST:
if (c->euid)
goto badcred;
digest.timestamp = time(NULL);
m_compose(p, IMSG_CTL_GET_DIGEST, 0, 0, -1, &digest, sizeof digest);
return;
case IMSG_CTL_GET_STATS:
if (c->euid)
goto badcred;
kvp = imsg->data;
if (! stat_backend->iter(&kvp->iter, &key, &val))
kvp->iter = NULL;
else {
(void)strlcpy(kvp->key, key, sizeof kvp->key);
kvp->val = val;
}
m_compose(p, IMSG_CTL_GET_STATS, 0, 0, -1, kvp, sizeof *kvp);
return;
case IMSG_CTL_SHUTDOWN:
/* NEEDS_FIX */
log_debug("debug: received shutdown request");
if (c->euid)
goto badcred;
if (env->sc_flags & SMTPD_EXITING) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
env->sc_flags |= SMTPD_EXITING;
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
m_compose(p_parent, IMSG_CTL_SHUTDOWN, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_VERBOSE:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof(verbose))
goto badcred;
memcpy(&v, imsg->data, sizeof(v));
verbose = v;
log_verbose(verbose);
control_broadcast_verbose(IMSG_CTL_VERBOSE, verbose);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_TRACE_ENABLE:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof(verbose))
goto badcred;
memcpy(&v, imsg->data, sizeof(v));
verbose |= v;
log_verbose(verbose);
control_broadcast_verbose(IMSG_CTL_VERBOSE, verbose);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_TRACE_DISABLE:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof(verbose))
goto badcred;
memcpy(&v, imsg->data, sizeof(v));
verbose &= ~v;
log_verbose(verbose);
control_broadcast_verbose(IMSG_CTL_VERBOSE, verbose);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_PROFILE_ENABLE:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof(verbose))
goto badcred;
memcpy(&v, imsg->data, sizeof(v));
profiling |= v;
control_broadcast_verbose(IMSG_CTL_PROFILE, profiling);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_PROFILE_DISABLE:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof(verbose))
goto badcred;
memcpy(&v, imsg->data, sizeof(v));
profiling &= ~v;
control_broadcast_verbose(IMSG_CTL_PROFILE, profiling);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_PAUSE_EVP:
if (c->euid)
goto badcred;
imsg->hdr.peerid = c->id;
m_forward(p_scheduler, imsg);
return;
case IMSG_CTL_PAUSE_MDA:
if (c->euid)
goto badcred;
if (env->sc_flags & SMTPD_MDA_PAUSED) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: mda paused");
env->sc_flags |= SMTPD_MDA_PAUSED;
m_compose(p_queue, IMSG_CTL_PAUSE_MDA, 0, 0, -1, NULL, 0);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_PAUSE_MTA:
if (c->euid)
goto badcred;
if (env->sc_flags & SMTPD_MTA_PAUSED) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: mta paused");
env->sc_flags |= SMTPD_MTA_PAUSED;
m_compose(p_queue, IMSG_CTL_PAUSE_MTA, 0, 0, -1, NULL, 0);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_PAUSE_SMTP:
if (c->euid)
goto badcred;
if (env->sc_flags & SMTPD_SMTP_PAUSED) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: smtp paused");
env->sc_flags |= SMTPD_SMTP_PAUSED;
m_compose(p_pony, IMSG_CTL_PAUSE_SMTP, 0, 0, -1, NULL, 0);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_RESUME_EVP:
if (c->euid)
goto badcred;
imsg->hdr.peerid = c->id;
m_forward(p_scheduler, imsg);
return;
case IMSG_CTL_RESUME_MDA:
if (c->euid)
goto badcred;
if (! (env->sc_flags & SMTPD_MDA_PAUSED)) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: mda resumed");
env->sc_flags &= ~SMTPD_MDA_PAUSED;
m_compose(p_queue, IMSG_CTL_RESUME_MDA, 0, 0, -1, NULL, 0);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_RESUME_MTA:
if (c->euid)
goto badcred;
if (!(env->sc_flags & SMTPD_MTA_PAUSED)) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: mta resumed");
env->sc_flags &= ~SMTPD_MTA_PAUSED;
m_compose(p_queue, IMSG_CTL_RESUME_MTA, 0, 0, -1, NULL, 0);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_RESUME_SMTP:
if (c->euid)
goto badcred;
if (!(env->sc_flags & SMTPD_SMTP_PAUSED)) {
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
return;
}
log_info("info: smtp resumed");
env->sc_flags &= ~SMTPD_SMTP_PAUSED;
m_forward(p_pony, imsg);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_RESUME_ROUTE:
if (c->euid)
goto badcred;
m_forward(p_pony, imsg);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_LIST_MESSAGES:
if (c->euid)
goto badcred;
m_compose(p_scheduler, IMSG_CTL_LIST_MESSAGES, c->id, 0, -1,
imsg->data, imsg->hdr.len - sizeof(imsg->hdr));
return;
case IMSG_CTL_LIST_ENVELOPES:
if (c->euid)
goto badcred;
m_compose(p_scheduler, IMSG_CTL_LIST_ENVELOPES, c->id, 0, -1,
imsg->data, imsg->hdr.len - sizeof(imsg->hdr));
return;
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_SHOW_BLOCK:
if (c->euid)
goto badcred;
imsg->hdr.peerid = c->id;
m_forward(p_pony, imsg);
return;
case IMSG_CTL_SHOW_STATUS:
if (c->euid)
goto badcred;
m_compose(p, IMSG_CTL_SHOW_STATUS, 0, 0, -1, &env->sc_flags,
sizeof(env->sc_flags));
return;
case IMSG_CTL_MTA_BLOCK:
case IMSG_CTL_MTA_UNBLOCK:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE <= sizeof(ss))
goto invalid;
memmove(&ss, imsg->data, sizeof(ss));
m_create(p_pony, imsg->hdr.type, c->id, 0, -1);
m_add_sockaddr(p_pony, (struct sockaddr *)&ss);
m_add_string(p_pony, (char *)imsg->data + sizeof(ss));
m_close(p_pony);
return;
case IMSG_CTL_SCHEDULE:
if (c->euid)
goto badcred;
imsg->hdr.peerid = c->id;
m_forward(p_scheduler, imsg);
return;
case IMSG_CTL_REMOVE:
if (c->euid)
goto badcred;
imsg->hdr.peerid = c->id;
m_forward(p_scheduler, imsg);
return;
case IMSG_CTL_UPDATE_TABLE:
if (c->euid)
goto badcred;
/* table name too long */
len = strlen(imsg->data);
if (len >= LINE_MAX)
goto invalid;
m_forward(p_lka, imsg);
m_compose(p, IMSG_CTL_OK, 0, 0, -1, NULL, 0);
return;
case IMSG_CTL_DISCOVER_EVPID:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof evpid)
goto invalid;
memmove(&evpid, imsg->data, sizeof evpid);
m_create(p_queue, imsg->hdr.type, c->id, 0, -1);
m_add_evpid(p_queue, evpid);
m_close(p_queue);
return;
case IMSG_CTL_DISCOVER_MSGID:
case IMSG_CTL_UNCORRUPT_MSGID:
if (c->euid)
goto badcred;
if (imsg->hdr.len - IMSG_HEADER_SIZE != sizeof msgid)
goto invalid;
memmove(&msgid, imsg->data, sizeof msgid);
m_create(p_queue, imsg->hdr.type, c->id, 0, -1);
m_add_msgid(p_queue, msgid);
m_close(p_queue);
return;
default:
log_debug("debug: control_dispatch_ext: "
"error handling %s imsg",
imsg_to_str(imsg->hdr.type));
return;
}
badcred:
invalid:
m_compose(p, IMSG_CTL_FAIL, 0, 0, -1, NULL, 0);
}
static void
mta_enter_state(struct mta_session *s, int newstate)
{
struct mta_envelope *e;
size_t envid_sz;
int oldstate;
ssize_t q;
char ibuf[SMTPD_MAXLINESIZE];
char obuf[SMTPD_MAXLINESIZE];
int offset;
again:
oldstate = s->state;
log_trace(TRACE_MTA, "mta: %p: %s -> %s", s,
mta_strstate(oldstate),
mta_strstate(newstate));
s->state = newstate;
/* don't try this at home! */
#define mta_enter_state(_s, _st) do { newstate = _st; goto again; } while (0)
switch (s->state) {
case MTA_INIT:
case MTA_BANNER:
break;
case MTA_EHLO:
s->ext = 0;
mta_send(s, "EHLO %s", s->helo);
break;
case MTA_HELO:
s->ext = 0;
mta_send(s, "HELO %s", s->helo);
break;
case MTA_LHLO:
s->ext = 0;
mta_send(s, "LHLO %s", s->helo);
break;
case MTA_STARTTLS:
if (s->flags & MTA_TLS) /* already started */
mta_enter_state(s, MTA_AUTH);
else if ((s->ext & MTA_EXT_STARTTLS) == 0) {
if (s->flags & MTA_FORCE_TLS || s->flags & MTA_WANT_SECURE) {
mta_error(s, "TLS required but not supported by remote host");
mta_connect(s);
}
else
/* server doesn't support starttls, do not use it */
mta_enter_state(s, MTA_AUTH);
}
else
mta_send(s, "STARTTLS");
break;
case MTA_AUTH:
if (s->relay->secret && s->flags & MTA_TLS) {
if (s->ext & MTA_EXT_AUTH) {
if (s->ext & MTA_EXT_AUTH_PLAIN) {
mta_enter_state(s, MTA_AUTH_PLAIN);
break;
}
if (s->ext & MTA_EXT_AUTH_LOGIN) {
mta_enter_state(s, MTA_AUTH_LOGIN);
break;
}
log_debug("debug: mta: %p: no supported AUTH method on session", s);
mta_error(s, "no supported AUTH method");
}
else {
log_debug("debug: mta: %p: AUTH not advertised on session", s);
mta_error(s, "AUTH not advertised");
}
}
else if (s->relay->secret) {
log_debug("debug: mta: %p: not using AUTH on non-TLS "
"session", s);
mta_error(s, "Refuse to AUTH over unsecure channel");
mta_connect(s);
} else {
mta_enter_state(s, MTA_READY);
}
break;
case MTA_AUTH_PLAIN:
mta_send(s, "AUTH PLAIN %s", s->relay->secret);
break;
case MTA_AUTH_LOGIN:
mta_send(s, "AUTH LOGIN");
break;
case MTA_AUTH_LOGIN_USER:
memset(ibuf, 0, sizeof ibuf);
if (base64_decode(s->relay->secret, (unsigned char *)ibuf,
sizeof(ibuf)-1) == -1) {
log_debug("debug: mta: %p: credentials too large on session", s);
mta_error(s, "Credentials too large");
break;
}
memset(obuf, 0, sizeof obuf);
base64_encode((unsigned char *)ibuf + 1, strlen(ibuf + 1), obuf, sizeof obuf);
mta_send(s, "%s", obuf);
memset(ibuf, 0, sizeof ibuf);
memset(obuf, 0, sizeof obuf);
break;
case MTA_AUTH_LOGIN_PASS:
memset(ibuf, 0, sizeof ibuf);
if (base64_decode(s->relay->secret, (unsigned char *)ibuf,\
sizeof(ibuf)-1) == -1) {
log_debug("debug: mta: %p: credentials too large on session", s);
mta_error(s, "Credentials too large");
break;
}
offset = strlen(ibuf+1)+2;
memset(obuf, 0, sizeof obuf);
base64_encode((unsigned char *)ibuf + offset, strlen(ibuf + offset), obuf, sizeof obuf);
mta_send(s, "%s", obuf);
memset(ibuf, 0, sizeof ibuf);
memset(obuf, 0, sizeof obuf);
break;
case MTA_READY:
/* Ready to send a new mail */
if (s->ready == 0) {
s->ready = 1;
s->relay->nconn_ready += 1;
mta_route_ok(s->relay, s->route);
}
if (s->msgtried >= MAX_TRYBEFOREDISABLE) {
log_info("smtp-out: Remote host seems to reject all mails on session %016"PRIx64,
s->id);
mta_route_down(s->relay, s->route);
mta_enter_state(s, MTA_QUIT);
break;
}
if (s->msgcount >= s->relay->limits->max_mail_per_session) {
log_debug("debug: mta: "
"%p: cannot send more message to relay %s", s,
mta_relay_to_text(s->relay));
mta_enter_state(s, MTA_QUIT);
break;
}
s->task = mta_route_next_task(s->relay, s->route);
if (s->task == NULL) {
log_debug("debug: mta: %p: no task for relay %s",
s, mta_relay_to_text(s->relay));
if (s->relay->nconn > 1 ||
s->hangon >= s->relay->limits->sessdelay_keepalive) {
mta_enter_state(s, MTA_QUIT);
break;
}
log_debug("mta: debug: last connection: hanging on for %llds",
(long long)(s->relay->limits->sessdelay_keepalive -
s->hangon));
s->flags |= MTA_HANGON;
runq_schedule(hangon, time(NULL) + 1, NULL, s);
break;
}
log_debug("debug: mta: %p: handling next task for relay %s", s,
mta_relay_to_text(s->relay));
stat_increment("mta.task.running", 1);
m_create(p_queue, IMSG_QUEUE_MESSAGE_FD, 0, 0, -1);
m_add_id(p_queue, s->id);
m_add_msgid(p_queue, s->task->msgid);
m_close(p_queue);
tree_xset(&wait_fd, s->id, s);
s->flags |= MTA_WAIT;
break;
case MTA_MAIL:
if (s->currevp == NULL)
s->currevp = TAILQ_FIRST(&s->task->envelopes);
e = s->currevp;
s->hangon = 0;
s->msgtried++;
envid_sz = strlen(e->dsn_envid);
if (s->ext & MTA_EXT_DSN) {
mta_send(s, "MAIL FROM:<%s> %s%s %s%s",
s->task->sender,
e->dsn_ret ? "RET=" : "",
e->dsn_ret ? dsn_strret(e->dsn_ret) : "",
envid_sz ? "ENVID=" : "",
envid_sz ? e->dsn_envid : "");
} else
mta_send(s, "MAIL FROM:<%s>", s->task->sender);
break;
case MTA_RCPT:
if (s->currevp == NULL)
s->currevp = TAILQ_FIRST(&s->task->envelopes);
e = s->currevp;
if (s->ext & MTA_EXT_DSN) {
mta_send(s, "RCPT TO:<%s> %s%s %s%s",
e->dest,
e->dsn_notify ? "NOTIFY=" : "",
e->dsn_notify ? dsn_strnotify(e->dsn_notify) : "",
e->dsn_orcpt ? "ORCPT=" : "",
e->dsn_orcpt ? e->dsn_orcpt : "");
} else
mta_send(s, "RCPT TO:<%s>", e->dest);
s->rcptcount++;
break;
case MTA_DATA:
fseek(s->datafp, 0, SEEK_SET);
mta_send(s, "DATA");
break;
case MTA_BODY:
if (s->datafp == NULL) {
log_trace(TRACE_MTA, "mta: %p: end-of-file", s);
mta_enter_state(s, MTA_EOM);
break;
}
if ((q = mta_queue_data(s)) == -1) {
s->flags |= MTA_FREE;
break;
}
if (q == 0) {
mta_enter_state(s, MTA_BODY);
break;
}
log_trace(TRACE_MTA, "mta: %p: >>> [...%zi bytes...]", s, q);
break;
case MTA_EOM:
mta_send(s, ".");
break;
case MTA_LMTP_EOM:
/* LMTP reports status of each delivery, so enable read */
io_set_read(&s->io);
break;
case MTA_RSET:
if (s->datafp) {
fclose(s->datafp);
s->datafp = NULL;
}
mta_send(s, "RSET");
break;
case MTA_QUIT:
mta_send(s, "QUIT");
break;
default:
fatalx("mta_enter_state: unknown state");
}
#undef mta_enter_state
}