static void
mta_route_drain(struct mta_route *route)
{
struct mta_task *task;
struct envelope *e;
log_debug("mta: draining %s (tasks=%i, refs=%i, sessions=%i)",
mta_route_to_text(route),
route->ntask, route->refcount, route->nsession);
if (route->ntask == 0 && route->refcount == 0 && route->nsession == 0) {
mta_route_free(route);
stat_decrement("mta.route", 1);
return;
}
if (route->ntask == 0) {
log_debug("mta: no task for %s", mta_route_to_text(route));
return;
}
if (route->nfail > 3) {
/* Three connection errors in a row: consider that the route
* has a problem.
*/
log_debug("mta: too many failures on %s",
mta_route_to_text(route));
while ((task = TAILQ_FIRST(&route->tasks))) {
TAILQ_REMOVE(&route->tasks, task, entry);
route->ntask -= 1;
while((e = TAILQ_FIRST(&task->envelopes)))
mta_envelope_done(task, e, route->errorline);
free(task);
stat_decrement("mta.task", 1);
}
route->nfail = 0;
/* XXX maybe close the route for while */
return;
}
/* make sure there are one session for each task */
while (route->nsession < route->ntask) {
/* if we have reached the max number of session, wait */
if (route->nsession >= route->maxconn) {
log_debug("mta: max conn reached for %s",
mta_route_to_text(route));
return;
}
route->nsession += 1;
mta_session(route);
}
}
void
session_destroy(struct session *s, const char * reason)
{
uint32_t msgid;
log_debug("smtp: %p: deleting session: %s", s, reason);
if (s->s_flags & F_ZOMBIE)
goto finalize;
log_debug("session_destroy: s->datafp = %p", s->datafp);
if (s->datafp != NULL)
fclose(s->datafp);
if (s->s_msg.id != 0 && s->s_state != S_DONE) {
msgid = evpid_to_msgid(s->s_msg.id);
imsg_compose_event(env->sc_ievs[PROC_QUEUE],
IMSG_QUEUE_REMOVE_MESSAGE, 0, 0, -1, &msgid, sizeof(msgid));
}
if (s->s_io.ssl) {
if (s->s_l->flags & F_SMTPS)
if (s->s_flags & F_SECURE)
stat_decrement("smtp.smtps", 1);
if (s->s_l->flags & F_STARTTLS)
if (s->s_flags & F_SECURE)
stat_decrement("smtp.tls", 1);
}
event_del(&s->s_ev); /* in case something was scheduled */
io_clear(&s->s_io);
iobuf_clear(&s->s_iobuf);
/* resume when session count decreases to 95% */
stat_decrement("smtp.session", 1);
/* If the session is waiting for an imsg, do not kill it now, since
* the id must still be valid.
*/
if (s->s_flags & F_WAITIMSG) {
s->s_flags = F_ZOMBIE;
return;
}
finalize:
smtp_destroy(s);
SPLAY_REMOVE(sessiontree, &env->sc_sessions, s);
bzero(s, sizeof(*s));
free(s);
}
static void
mta_free(struct mta_session *s)
{
struct mta_relay *relay;
struct mta_route *route;
log_debug("debug: mta: %p: session done", s);
if (s->ready)
s->relay->nconn_ready -= 1;
if (s->flags & MTA_HANGON) {
log_debug("debug: mta: %p: cancelling hangon timer", s);
runq_cancel(hangon, NULL, s);
}
io_clear(&s->io);
iobuf_clear(&s->iobuf);
if (s->task)
fatalx("current task should have been deleted already");
if (s->datafp)
fclose(s->datafp);
if (s->helo)
free(s->helo);
relay = s->relay;
route = s->route;
free(s);
stat_decrement("mta.session", 1);
mta_route_collect(relay, route);
}
static int
queue_ram_envelope_update(uint64_t evpid, const char *buf, size_t len)
{
struct qr_envelope *evp;
struct qr_message *msg;
void *tmp;
if ((msg = get_message(evpid_to_msgid(evpid))) == NULL)
return (0);
if ((evp = tree_get(&msg->envelopes, evpid)) == NULL) {
log_warn("warn: queue-ram: not found");
return (0);
}
tmp = malloc(len);
if (tmp == NULL) {
log_warn("warn: queue-ram: malloc");
return (0);
}
memmove(tmp, buf, len);
free(evp->buf);
evp->len = len;
evp->buf = tmp;
stat_decrement("queue.ram.envelope.size", evp->len);
stat_increment("queue.ram.envelope.size", len);
return (1);
}
static void
mta_status(struct mta_session *s, int connerr, const char *fmt, ...)
{
struct envelope *e;
char *status;
va_list ap;
va_start(ap, fmt);
if (vasprintf(&status, fmt, ap) == -1)
fatal("vasprintf");
va_end(ap);
if (s->task) {
while((e = TAILQ_FIRST(&s->task->envelopes)))
mta_envelope_done(s->task, e, status);
free(s->task);
s->task = NULL;
stat_decrement("mta.task.running", 1);
}
if (connerr)
mta_route_error(s->route, status);
free(status);
}
static int
queue_ram_message_delete(uint32_t msgid)
{
struct qr_message *msg;
struct qr_envelope *evp;
uint64_t evpid;
if ((msg = tree_pop(&messages, msgid)) == NULL) {
log_warnx("warn: queue-ram: not found");
return (0);
}
while (tree_poproot(&messages, &evpid, (void**)&evp)) {
stat_decrement("queue.ram.envelope.size", evp->len);
free(evp->buf);
free(evp);
}
stat_decrement("queue.ram.message.size", msg->len);
free(msg->buf);
free(msg);
return (0);
}
static void
queue_envelope_cache_del(uint64_t evpid)
{
struct envelope *cached;
if ((cached = tree_pop(&evpcache_tree, evpid)) == NULL)
return;
TAILQ_REMOVE(&evpcache_list, cached, entry);
free(cached);
stat_decrement("queue.evpcache.size", 1);
}
static int
queue_ram_envelope_delete(uint64_t evpid)
{
struct qr_envelope *evp;
struct qr_message *msg;
if ((msg = get_message(evpid_to_msgid(evpid))) == NULL)
return (0);
if ((evp = tree_pop(&msg->envelopes, evpid)) == NULL) {
log_warnx("warn: queue-ram: not found");
return (0);
}
stat_decrement("queue.ram.envelope.size", evp->len);
free(evp->buf);
free(evp);
if (tree_empty(&msg->envelopes)) {
tree_xpop(&messages, evpid_to_msgid(evpid));
stat_decrement("queue.ram.message.size", msg->len);
free(msg->buf);
free(msg);
}
return (1);
}
static void
mta_envelope_done(struct mta_task *task, struct envelope *e, const char *status)
{
char relay[MAX_LINE_SIZE];
envelope_set_errormsg(e, "%s", status);
snprintf(relay, sizeof relay, "relay=%s, ", task->route->hostname);
log_envelope(e, relay, e->errorline);
imsg_compose_event(env->sc_ievs[PROC_QUEUE],
mta_response_delivery(e->errorline), 0, 0, -1, e, sizeof(*e));
TAILQ_REMOVE(&task->envelopes, e, entry);
free(e);
stat_decrement("mta.envelope", 1);
}
void
control_close(int fd)
{
struct ctl_conn *c;
if ((c = control_connbyfd(fd)) == NULL) {
log_warn("control_close: fd %d: not found", fd);
return;
}
TAILQ_REMOVE(&ctl_conns, c, entry);
event_del(&c->iev.ev);
imsg_clear(&c->iev.ibuf);
close(fd);
free(c);
if (stat_decrement(STATS_CONTROL_SESSION) < env->sc_maxconn &&
!event_pending(&control_state.ev, EV_READ, NULL)) {
log_warnx("re-enabling ctl connections");
event_add(&control_state.ev, NULL);
}
}
static void
mta_envelope_done(struct mta_task *task, struct envelope *e, const char *status)
{
struct mta_host *host = TAILQ_FIRST(&task->session->hosts);
char relay[MAX_LINE_SIZE], stat[MAX_LINE_SIZE];
envelope_set_errormsg(e, "%s", status);
snprintf(relay, sizeof relay, "relay=%s [%s], ",
host->fqdn, ss_to_text(&host->sa));
snprintf(stat, sizeof stat, "%s (%s)",
mta_response_status(e->errorline),
mta_response_text(e->errorline));
log_envelope(e, relay, stat);
imsg_compose_event(env->sc_ievs[PROC_QUEUE],
mta_response_delivery(e->errorline), 0, 0, -1, e, sizeof(*e));
TAILQ_REMOVE(&task->envelopes, e, entry);
free(e);
stat_decrement("mta.envelope", 1);
}
/*
* Handle a response to an SMTP command
*/
static void
mta_response(struct mta_session *s, char *line)
{
struct mta_envelope *e;
struct sockaddr_storage ss;
struct sockaddr *sa;
const char *domain;
socklen_t sa_len;
char buf[SMTPD_MAXLINESIZE];
int delivery;
switch (s->state) {
case MTA_BANNER:
if (s->flags & MTA_LMTP)
mta_enter_state(s, MTA_LHLO);
else
mta_enter_state(s, MTA_EHLO);
break;
case MTA_EHLO:
if (line[0] != '2') {
/* rejected at ehlo state */
if ((s->flags & MTA_USE_AUTH) ||
(s->flags & MTA_WANT_SECURE)) {
mta_error(s, "EHLO rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_HELO);
return;
}
if (!(s->flags & MTA_FORCE_PLAIN))
mta_enter_state(s, MTA_STARTTLS);
else
mta_enter_state(s, MTA_READY);
break;
case MTA_HELO:
if (line[0] != '2') {
mta_error(s, "HELO rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_READY);
break;
case MTA_LHLO:
if (line[0] != '2') {
mta_error(s, "LHLO rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_READY);
break;
case MTA_STARTTLS:
if (line[0] != '2') {
if (!(s->flags & MTA_WANT_SECURE)) {
mta_enter_state(s, MTA_AUTH);
return;
}
/* XXX mark that the MX doesn't support STARTTLS */
mta_error(s, "STARTTLS rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_start_tls(s);
break;
case MTA_AUTH_PLAIN:
if (line[0] != '2') {
mta_error(s, "AUTH rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_READY);
break;
case MTA_AUTH_LOGIN:
if (strncmp(line, "334 ", 4) != 0) {
mta_error(s, "AUTH rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_AUTH_LOGIN_USER);
break;
case MTA_AUTH_LOGIN_USER:
if (strncmp(line, "334 ", 4) != 0) {
mta_error(s, "AUTH rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_AUTH_LOGIN_PASS);
break;
case MTA_AUTH_LOGIN_PASS:
if (line[0] != '2') {
mta_error(s, "AUTH rejected: %s", line);
s->flags |= MTA_FREE;
return;
}
mta_enter_state(s, MTA_READY);
break;
case MTA_MAIL:
if (line[0] != '2') {
if (line[0] == '5')
delivery = IMSG_DELIVERY_PERMFAIL;
else
delivery = IMSG_DELIVERY_TEMPFAIL;
mta_flush_task(s, delivery, line, 0, 0);
mta_enter_state(s, MTA_RSET);
return;
}
mta_enter_state(s, MTA_RCPT);
break;
case MTA_RCPT:
e = s->currevp;
/* remove envelope from hosttat cache if there */
if ((domain = strchr(e->dest, '@')) != NULL) {
domain++;
mta_hoststat_uncache(domain, e->id);
}
s->currevp = TAILQ_NEXT(s->currevp, entry);
if (line[0] == '2') {
s->failures = 0;
/*
* this host is up, reschedule envelopes that
* were cached for reschedule.
*/
if (domain)
mta_hoststat_reschedule(domain);
}
else {
if (line[0] == '5')
delivery = IMSG_DELIVERY_PERMFAIL;
else
delivery = IMSG_DELIVERY_TEMPFAIL;
s->failures++;
/* remove failed envelope from task list */
TAILQ_REMOVE(&s->task->envelopes, e, entry);
stat_decrement("mta.envelope", 1);
/* log right away */
snprintf(buf, sizeof(buf), "%s",
mta_host_to_text(s->route->dst));
e->session = s->id;
/* XXX */
/*
* getsockname() can only fail with ENOBUFS here
* best effort, don't log source ...
*/
sa_len = sizeof(ss);
sa = (struct sockaddr *)&ss;
if (getsockname(s->io.sock, sa, &sa_len) < 0)
mta_delivery_log(e, NULL, buf, delivery, line);
else
mta_delivery_log(e, sa_to_text(sa),
buf, delivery, line);
if (domain)
mta_hoststat_update(domain + 1, e->status);
mta_delivery_notify(e);
if (s->relay->limits->max_failures_per_session &&
s->failures == s->relay->limits->max_failures_per_session) {
mta_flush_task(s, IMSG_DELIVERY_TEMPFAIL,
"Too many consecutive errors, closing connection", 0, 1);
mta_enter_state(s, MTA_QUIT);
break;
}
/*
* if no more envelopes, flush failed queue
*/
if (TAILQ_EMPTY(&s->task->envelopes)) {
mta_flush_task(s, IMSG_DELIVERY_OK,
"No envelope", 0, 0);
mta_enter_state(s, MTA_RSET);
break;
}
}
if (s->currevp == NULL)
mta_enter_state(s, MTA_DATA);
else
mta_enter_state(s, MTA_RCPT);
break;
case MTA_DATA:
if (line[0] == '2' || line[0] == '3') {
mta_enter_state(s, MTA_BODY);
break;
}
if (line[0] == '5')
delivery = IMSG_DELIVERY_PERMFAIL;
else
delivery = IMSG_DELIVERY_TEMPFAIL;
mta_flush_task(s, delivery, line, 0, 0);
mta_enter_state(s, MTA_RSET);
break;
case MTA_LMTP_EOM:
case MTA_EOM:
if (line[0] == '2') {
delivery = IMSG_DELIVERY_OK;
s->msgtried = 0;
s->msgcount++;
}
else if (line[0] == '5')
delivery = IMSG_DELIVERY_PERMFAIL;
else
delivery = IMSG_DELIVERY_TEMPFAIL;
mta_flush_task(s, delivery, line, (s->flags & MTA_LMTP) ? 1 : 0, 0);
if (s->task) {
s->rcptcount--;
mta_enter_state(s, MTA_LMTP_EOM);
} else {
s->rcptcount = 0;
if (s->relay->limits->sessdelay_transaction) {
log_debug("debug: mta: waiting for %llds before next transaction",
(long long int)s->relay->limits->sessdelay_transaction);
s->hangon = s->relay->limits->sessdelay_transaction -1;
s->flags |= MTA_HANGON;
runq_schedule(hangon, time(NULL)
+ s->relay->limits->sessdelay_transaction,
NULL, s);
}
else
mta_enter_state(s, MTA_READY);
}
break;
case MTA_RSET:
s->rcptcount = 0;
if (s->relay->limits->sessdelay_transaction) {
log_debug("debug: mta: waiting for %llds after reset",
(long long int)s->relay->limits->sessdelay_transaction);
s->hangon = s->relay->limits->sessdelay_transaction -1;
s->flags |= MTA_HANGON;
runq_schedule(hangon, time(NULL)
+ s->relay->limits->sessdelay_transaction,
NULL, s);
}
else
mta_enter_state(s, MTA_READY);
break;
default:
fatalx("mta_response() bad state");
}
}
static void
mta_flush_task(struct mta_session *s, int delivery, const char *error, size_t count,
int cache)
{
struct mta_envelope *e;
char relay[SMTPD_MAXLINESIZE];
size_t n;
struct sockaddr_storage ss;
struct sockaddr *sa;
socklen_t sa_len;
const char *domain;
snprintf(relay, sizeof relay, "%s", mta_host_to_text(s->route->dst));
n = 0;
while ((e = TAILQ_FIRST(&s->task->envelopes))) {
if (count && n == count) {
stat_decrement("mta.envelope", n);
return;
}
TAILQ_REMOVE(&s->task->envelopes, e, entry);
/* we're about to log, associate session to envelope */
e->session = s->id;
e->ext = s->ext;
/* XXX */
/*
* getsockname() can only fail with ENOBUFS here
* best effort, don't log source ...
*/
sa = (struct sockaddr *)&ss;
sa_len = sizeof(ss);
if (getsockname(s->io.sock, sa, &sa_len) < 0)
mta_delivery_log(e, NULL, relay, delivery, error);
else
mta_delivery_log(e, sa_to_text(sa),
relay, delivery, error);
mta_delivery_notify(e);
domain = strchr(e->dest, '@');
if (domain) {
mta_hoststat_update(domain + 1, error);
if (cache)
mta_hoststat_cache(domain + 1, e->id);
}
n++;
}
free(s->task->sender);
free(s->task);
s->task = NULL;
if (s->datafp) {
fclose(s->datafp);
s->datafp = NULL;
}
stat_decrement("mta.envelope", n);
stat_decrement("mta.task.running", 1);
stat_decrement("mta.task", 1);
}
void
runner_imsg(struct imsgev *iev, struct imsg *imsg)
{
struct envelope *e, bounce;
struct scheduler_info si;
log_imsg(PROC_RUNNER, iev->proc, imsg);
switch (imsg->hdr.type) {
case IMSG_QUEUE_COMMIT_MESSAGE:
e = imsg->data;
runner_message_to_scheduler(evpid_to_msgid(e->id));
runner_reset_events();
return;
case IMSG_QUEUE_DELIVERY_OK:
stat_decrement(STATS_RUNNER);
e = imsg->data;
log_debug("queue_delivery_ok: %016"PRIx64, e->id);
scheduler->remove(e->id);
queue_envelope_delete(e);
return;
case IMSG_QUEUE_DELIVERY_TEMPFAIL:
stat_decrement(STATS_RUNNER);
e = imsg->data;
e->retry++;
queue_envelope_update(e);
log_debug("queue_delivery_tempfail: %016"PRIx64, e->id);
scheduler_info(&si, e);
scheduler->insert(&si);
runner_reset_events();
return;
case IMSG_QUEUE_DELIVERY_PERMFAIL:
stat_decrement(STATS_RUNNER);
e = imsg->data;
if (e->type != D_BOUNCE && e->sender.user[0] != '\0') {
bounce_record_message(e, &bounce);
log_debug("queue_delivery_permfail: %016"PRIx64,
bounce.id);
scheduler_info(&si, &bounce);
scheduler->insert(&si);
runner_reset_events();
}
scheduler->remove(e->id);
queue_envelope_delete(e);
return;
case IMSG_MDA_SESS_NEW:
stat_decrement(STATS_MDA_SESSION);
if (env->sc_maxconn - stat_get(STATS_MDA_SESSION, STAT_ACTIVE))
env->sc_flags &= ~SMTPD_MDA_BUSY;
runner_reset_events();
return;
case IMSG_BATCH_DONE:
stat_decrement(STATS_MTA_SESSION);
if (env->sc_maxconn - stat_get(STATS_MTA_SESSION, STAT_ACTIVE))
env->sc_flags &= ~SMTPD_MTA_BUSY;
runner_reset_events();
return;
case IMSG_SMTP_ENQUEUE:
e = imsg->data;
if (imsg->fd < 0 || !bounce_session(imsg->fd, e)) {
queue_envelope_update(e);
log_debug("smtp_enqueue: %016"PRIx64, e->id);
scheduler_info(&si, e);
scheduler->insert(&si);
runner_reset_events();
return;
}
return;
case IMSG_QUEUE_PAUSE_MDA:
env->sc_flags |= SMTPD_MDA_PAUSED;
return;
case IMSG_QUEUE_RESUME_MDA:
env->sc_flags &= ~SMTPD_MDA_PAUSED;
runner_reset_events();
return;
case IMSG_QUEUE_PAUSE_MTA:
env->sc_flags |= SMTPD_MTA_PAUSED;
return;
case IMSG_QUEUE_RESUME_MTA:
env->sc_flags &= ~SMTPD_MTA_PAUSED;
runner_reset_events();
return;
case IMSG_CTL_VERBOSE:
log_verbose(*(int *)imsg->data);
return;
case IMSG_RUNNER_SCHEDULE:
scheduler->force(*(u_int64_t *)imsg->data);
runner_reset_events();
return;
case IMSG_RUNNER_REMOVE: {
runner_remove(*(u_int64_t *)imsg->data);
runner_reset_events();
return;
}
}
errx(1, "runner_imsg: unexpected %s imsg", imsg_to_str(imsg->hdr.type));
}
/*
* Handle a response to an SMTP command
*/
static void
mta_response(struct mta_session *s, char *line)
{
void *ssl;
struct envelope *evp;
switch (s->state) {
case MTA_SMTP_BANNER:
mta_enter_state(s, MTA_SMTP_EHLO);
break;
case MTA_SMTP_EHLO:
if (line[0] != '2') {
if ((s->flags & MTA_USE_AUTH) ||
!(s->flags & MTA_ALLOW_PLAIN)) {
mta_route_error(s->route, line);
mta_enter_state(s, MTA_DONE);
return;
}
mta_enter_state(s, MTA_SMTP_HELO);
return;
}
mta_enter_state(s, MTA_SMTP_STARTTLS);
break;
case MTA_SMTP_HELO:
if (line[0] != '2') {
mta_route_error(s->route, line);
mta_enter_state(s, MTA_DONE);
return;
}
mta_enter_state(s, MTA_SMTP_READY);
break;
case MTA_SMTP_STARTTLS:
if (line[0] != '2') {
if (s->flags & MTA_ALLOW_PLAIN) {
mta_enter_state(s, MTA_SMTP_AUTH);
return;
}
/* stop here if ssl can't be used */
mta_route_error(s->route, line);
mta_enter_state(s, MTA_DONE);
return;
}
ssl = ssl_mta_init(s->ssl);
if (ssl == NULL)
fatal("mta: ssl_mta_init");
s->is_reading = 0;
io_set_write(&s->io);
io_start_tls(&s->io, ssl);
break;
case MTA_SMTP_AUTH:
if (line[0] != '2') {
mta_route_error(s->route, line);
mta_enter_state(s, MTA_DONE);
return;
}
mta_enter_state(s, MTA_SMTP_READY);
break;
case MTA_SMTP_MAIL:
if (line[0] != '2') {
mta_status(s, 0, line);
mta_enter_state(s, MTA_SMTP_RSET);
return;
}
mta_enter_state(s, MTA_SMTP_RCPT);
break;
case MTA_SMTP_RCPT:
evp = s->currevp;
s->currevp = TAILQ_NEXT(s->currevp, entry);
if (line[0] != '2') {
mta_envelope_done(s->task, evp, line);
if (TAILQ_EMPTY(&s->task->envelopes)) {
free(s->task);
s->task = NULL;
stat_decrement("mta.task.running", 1);
mta_enter_state(s, MTA_SMTP_RSET);
break;
}
}
if (s->currevp == NULL)
mta_enter_state(s, MTA_SMTP_DATA);
else
mta_enter_state(s, MTA_SMTP_RCPT);
break;
case MTA_SMTP_DATA:
if (line[0] != '2' && line[0] != '3') {
mta_status(s, 0, line);
mta_enter_state(s, MTA_SMTP_RSET);
return;
}
mta_enter_state(s, MTA_SMTP_BODY);
break;
case MTA_SMTP_DONE:
mta_status(s, 0, line);
if (line[0] == '2')
s->msgcount++;
mta_enter_state(s, MTA_SMTP_READY);
break;
case MTA_SMTP_RSET:
mta_enter_state(s, MTA_SMTP_READY);
break;
default:
fatalx("mta_response() bad state");
}
}
static void
mta_enter_state(struct mta_session *s, int newstate)
{
int oldstate;
struct secret secret;
struct mta_route *route;
struct mta_host *host;
struct sockaddr *sa;
int max_reuse;
ssize_t q;
#ifdef VALGRIND
bzero(&batch, sizeof(batch));
#endif
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:
if (s->route->auth)
mta_enter_state(s, MTA_SECRET);
else
mta_enter_state(s, MTA_MX);
break;
case MTA_DATA:
/*
* Obtain message body fd.
*/
imsg_compose_event(env->sc_ievs[PROC_QUEUE],
IMSG_QUEUE_MESSAGE_FD, s->task->msgid, 0, -1,
&s->id, sizeof(s->id));
break;
case MTA_SECRET:
/*
* Lookup AUTH secret.
*/
bzero(&secret, sizeof(secret));
secret.id = s->id;
strlcpy(secret.mapname, s->route->auth, sizeof(secret.mapname));
strlcpy(secret.host, s->route->hostname, sizeof(secret.host));
imsg_compose_event(env->sc_ievs[PROC_LKA], IMSG_LKA_SECRET,
0, 0, -1, &secret, sizeof(secret));
break;
case MTA_MX:
/*
* Lookup MX record.
*/
if (s->flags & MTA_FORCE_MX) /* XXX */
dns_query_host(s->route->hostname, s->route->port, s->id);
else
dns_query_mx(s->route->hostname, s->route->backupname, 0, s->id);
break;
case MTA_CONNECT:
/*
* Connect to the MX.
*/
/* cleanup previous connection if any */
iobuf_clear(&s->iobuf);
io_clear(&s->io);
if (s->flags & MTA_FORCE_ANYSSL)
max_reuse = 2;
else
max_reuse = 1;
/* pick next mx */
while ((host = TAILQ_FIRST(&s->hosts))) {
if (host->used == max_reuse) {
TAILQ_REMOVE(&s->hosts, host, entry);
free(host);
continue;
}
host->used++;
log_debug("mta: %p: connecting to %s...", s,
ss_to_text(&host->sa));
sa = (struct sockaddr *)&host->sa;
if (s->route->port)
sa_set_port(sa, s->route->port);
else if ((s->flags & MTA_FORCE_ANYSSL) && host->used == 1)
sa_set_port(sa, 465);
else if (s->flags & MTA_FORCE_SMTPS)
sa_set_port(sa, 465);
else
sa_set_port(sa, 25);
iobuf_xinit(&s->iobuf, 0, 0, "mta_enter_state");
io_init(&s->io, -1, s, mta_io, &s->iobuf);
io_set_timeout(&s->io, 10000);
if (io_connect(&s->io, sa, NULL) == -1) {
log_debug("mta: %p: connection failed: %s", s,
strerror(errno));
iobuf_clear(&s->iobuf);
/*
* This error is most likely a "no route",
* so there is no need to try the same
* relay again.
*/
TAILQ_REMOVE(&s->hosts, host, entry);
free(host);
continue;
}
return;
}
/* tried them all? */
mta_route_error(s->route, "150 Can not connect to MX");
mta_enter_state(s, MTA_DONE);
break;
case MTA_DONE:
/*
* Kill the mta session.
*/
log_debug("mta: %p: session done", s);
io_clear(&s->io);
iobuf_clear(&s->iobuf);
if (s->task)
fatalx("current task should have been deleted already");
if (s->datafp)
fclose(s->datafp);
s->datafp = NULL;
while ((host = TAILQ_FIRST(&s->hosts))) {
TAILQ_REMOVE(&s->hosts, host, entry);
free(host);
}
route = s->route;
tree_xpop(&sessions, s->id);
free(s);
stat_decrement("mta.session", 1);
mta_route_collect(route);
break;
case MTA_SMTP_BANNER:
/* just wait for banner */
s->is_reading = 1;
io_set_read(&s->io);
break;
case MTA_SMTP_EHLO:
s->ext = 0;
mta_send(s, "EHLO %s", env->sc_hostname);
break;
case MTA_SMTP_HELO:
s->ext = 0;
mta_send(s, "HELO %s", env->sc_hostname);
break;
case MTA_SMTP_STARTTLS:
if (s->flags & MTA_TLS) /* already started */
mta_enter_state(s, MTA_SMTP_AUTH);
else if ((s->ext & MTA_EXT_STARTTLS) == 0)
/* server doesn't support starttls, do not use it */
mta_enter_state(s, MTA_SMTP_AUTH);
else
mta_send(s, "STARTTLS");
break;
case MTA_SMTP_AUTH:
if (s->secret && s->flags & MTA_TLS)
mta_send(s, "AUTH PLAIN %s", s->secret);
else if (s->secret) {
log_debug("mta: %p: not using AUTH on non-TLS session",
s);
mta_enter_state(s, MTA_CONNECT);
} else {
mta_enter_state(s, MTA_SMTP_READY);
}
break;
case MTA_SMTP_READY:
/* ready to send a new mail */
if (s->ready == 0) {
s->ready = 1;
mta_route_ok(s->route);
}
if (s->msgcount >= s->route->maxmail) {
log_debug("mta: %p: cannot send more message to %s", s,
mta_route_to_text(s->route));
mta_enter_state(s, MTA_SMTP_QUIT);
} else if ((s->task = TAILQ_FIRST(&s->route->tasks))) {
log_debug("mta: %p: handling next task for %s", s,
mta_route_to_text(s->route));
TAILQ_REMOVE(&s->route->tasks, s->task, entry);
s->route->ntask -= 1;
s->task->session = s;
stat_decrement("mta.task", 1);
stat_increment("mta.task.running", 1);
mta_enter_state(s, MTA_DATA);
} else {
log_debug("mta: %p: no pending task for %s", s,
mta_route_to_text(s->route));
/* XXX stay open for a while? */
mta_enter_state(s, MTA_SMTP_QUIT);
}
break;
case MTA_SMTP_MAIL:
if (s->task->sender.user[0] && s->task->sender.domain[0])
mta_send(s, "MAIL FROM: <%s@%s>",
s->task->sender.user, s->task->sender.domain);
else
mta_send(s, "MAIL FROM: <>");
break;
case MTA_SMTP_RCPT:
if (s->currevp == NULL)
s->currevp = TAILQ_FIRST(&s->task->envelopes);
mta_send(s, "RCPT TO: <%s@%s>",
s->currevp->dest.user,
s->currevp->dest.domain);
break;
case MTA_SMTP_DATA:
fseek(s->datafp, 0, SEEK_SET);
mta_send(s, "DATA");
break;
case MTA_SMTP_BODY:
if (s->datafp == NULL) {
log_trace(TRACE_MTA, "mta: %p: end-of-file", s);
mta_enter_state(s, MTA_SMTP_DONE);
break;
}
if ((q = mta_queue_data(s)) == -1) {
mta_enter_state(s, MTA_DONE);
break;
}
log_trace(TRACE_MTA, "mta: %p: >>> [...%zi bytes...]", s, q);
break;
case MTA_SMTP_DONE:
mta_send(s, ".");
break;
case MTA_SMTP_QUIT:
mta_send(s, "QUIT");
break;
case MTA_SMTP_RSET:
mta_send(s, "RSET");
break;
default:
fatalx("mta_enter_state: unknown state");
}
#undef mta_enter_state
}