static int deliver_msg(char *return_path, char *authuser, int ignorequota,
char **users, int numusers, char *mailbox)
{
int r;
struct backend *conn;
struct lmtp_txn *txn = LMTP_TXN_ALLOC(numusers ? numusers : 1);
int j;
int ml = 0;
/* must have either some users or a mailbox */
if (!numusers && !mailbox) {
usage();
}
/* connect */
conn = backend_connect(NULL, sockaddr, &lmtp_protocol,
"", NULL, NULL);
if (!conn) {
just_exit("couldn't connect to lmtpd");
}
/* setup txn */
txn->from = return_path;
txn->auth = authuser;
txn->data = deliver_in;
txn->isdotstuffed = 0;
txn->tempfail_unknown_mailbox = 0;
txn->rcpt_num = numusers ? numusers : 1;
if (mailbox) ml = strlen(mailbox);
if (numusers == 0) {
/* just deliver to mailbox 'mailbox' */
const char *BB = config_getstring(IMAPOPT_POSTUSER);
txn->rcpt[0].addr = (char *) xmalloc(ml + strlen(BB) + 2); /* xxx leaks! */
sprintf(txn->rcpt[0].addr, "%s+%s", BB, mailbox);
txn->rcpt[0].ignorequota = ignorequota;
} else {
/* setup each recipient */
for (j = 0; j < numusers; j++) {
if (mailbox) {
size_t ulen;
txn->rcpt[j].addr =
(char *) xmalloc(strlen(users[j]) + ml + 2);
/* find the length of the userid minus the domain */
ulen = strcspn(users[j], "@");
sprintf(txn->rcpt[j].addr, "%.*s+%s",
(int) ulen, users[j], mailbox);
/* add the domain if we have one */
if (ulen < strlen(users[j]))
strcat(txn->rcpt[j].addr, users[j]+ulen);
} else {
txn->rcpt[j].addr = xstrdup(users[j]);
}
txn->rcpt[j].ignorequota = ignorequota;
}
}
/* run txn */
r = lmtp_runtxn(conn, txn);
/* disconnect */
backend_disconnect(conn);
free(conn);
/* examine txn for error state */
r = 0;
for (j = 0; j < txn->rcpt_num; j++) {
switch (txn->rcpt[j].result) {
case RCPT_GOOD:
break;
case RCPT_TEMPFAIL:
r = EC_TEMPFAIL;
break;
case RCPT_PERMFAIL:
/* we just need any permanent failure, though we should
probably return data from the client-side LMTP info */
printf("%s: %s\n",
txn->rcpt[j].addr, error_message(txn->rcpt[j].r));
if (r != EC_TEMPFAIL) {
r = EC_DATAERR;
}
break;
}
free(txn->rcpt[j].addr);
}
free(txn);
/* return appropriately */
return r;
}
/* Handle backend state transitions:
*
* The backend state starts in Initialising and the following transitions are
* allowed.
*
* Initialising -> InitWait -> Connected
* \
* \ ^ \ |
* \ | \ |
* \ | \ |
* \ | \ |
* \ | \ |
* \ | \ |
* V | V V
*
* Closed <-> Closing
*
* The state argument specifies the eventual state of the backend and the
* function transitions to that state via the shortest path.
*/
static void set_backend_state(struct backend_info *be,
enum xenbus_state state)
{
while (be->state != state) {
switch (be->state) {
case XenbusStateInitialising:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
case XenbusStateClosing:
backend_switch_state(be, XenbusStateInitWait);
break;
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosed);
break;
default:
BUG();
}
break;
case XenbusStateClosed:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
backend_switch_state(be, XenbusStateInitWait);
break;
case XenbusStateClosing:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateInitWait:
switch (state) {
case XenbusStateConnected:
backend_connect(be);
backend_switch_state(be, XenbusStateConnected);
break;
case XenbusStateClosing:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateConnected:
switch (state) {
case XenbusStateInitWait:
case XenbusStateClosing:
case XenbusStateClosed:
backend_disconnect(be);
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateClosing:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosed);
break;
default:
BUG();
}
break;
default:
BUG();
}
}
}
static void replica_connect(const char *channel)
{
int wait;
struct protoent *proto;
sasl_callback_t *cb;
int timeout;
const char *port, *auth_status = NULL;
cb = mysasl_callbacks(NULL,
get_config(channel, "sync_authname"),
get_config(channel, "sync_realm"),
get_config(channel, "sync_password"));
/* get the right port */
port = get_config(channel, "sync_port");
if (port) {
imap_csync_protocol.service = port;
csync_protocol.service = port;
}
for (wait = 15;; wait *= 2) {
sync_backend = backend_connect(sync_backend, servername,
&imap_csync_protocol, "", cb, &auth_status,
(verbose > 1 ? fileno(stderr) : -1));
if (sync_backend) {
if (sync_backend->capability & CAPA_REPLICATION) {
/* attach our IMAP tag buffer to our protstreams as userdata */
sync_backend->in->userdata = sync_backend->out->userdata = &tagbuf;
break;
}
else {
backend_disconnect(sync_backend);
sync_backend = NULL;
}
}
sync_backend = backend_connect(sync_backend, servername,
&csync_protocol, "", cb, NULL,
(verbose > 1 ? fileno(stderr) : -1));
if (sync_backend || auth_status || connect_once || wait > 1000) break;
fprintf(stderr,
"Can not connect to server '%s', retrying in %d seconds\n",
servername, wait);
sleep(wait);
}
free_callbacks(cb);
cb = NULL;
if (!sync_backend) {
fprintf(stderr, "Can not connect to server '%s'\n",
servername);
syslog(LOG_ERR, "Can not connect to server '%s'", servername);
_exit(1);
}
/* Disable Nagle's Algorithm => increase throughput
*
* http://en.wikipedia.org/wiki/Nagle's_algorithm
*/
if (servername[0] != '/') {
if (sync_backend->sock >= 0 && (proto = getprotobyname("tcp")) != NULL) {
int on = 1;
if (setsockopt(sync_backend->sock, proto->p_proto, TCP_NODELAY,
(void *) &on, sizeof(on)) != 0) {
syslog(LOG_ERR, "unable to setsocketopt(TCP_NODELAY): %m");
}
/* turn on TCP keepalive if set */
if (config_getswitch(IMAPOPT_TCP_KEEPALIVE)) {
int r;
int optval = 1;
socklen_t optlen = sizeof(optval);
struct protoent *proto = getprotobyname("TCP");
r = setsockopt(sync_backend->sock, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen);
if (r < 0) {
syslog(LOG_ERR, "unable to setsocketopt(SO_KEEPALIVE): %m");
}
#ifdef TCP_KEEPCNT
optval = config_getint(IMAPOPT_TCP_KEEPALIVE_CNT);
if (optval) {
r = setsockopt(sync_backend->sock, proto->p_proto, TCP_KEEPCNT, &optval, optlen);
if (r < 0) {
syslog(LOG_ERR, "unable to setsocketopt(TCP_KEEPCNT): %m");
}
}
#endif
#ifdef TCP_KEEPIDLE
optval = config_getint(IMAPOPT_TCP_KEEPALIVE_IDLE);
if (optval) {
r = setsockopt(sync_backend->sock, proto->p_proto, TCP_KEEPIDLE, &optval, optlen);
if (r < 0) {
syslog(LOG_ERR, "unable to setsocketopt(TCP_KEEPIDLE): %m");
}
}
#endif
#ifdef TCP_KEEPINTVL
optval = config_getint(IMAPOPT_TCP_KEEPALIVE_INTVL);
if (optval) {
r = setsockopt(sync_backend->sock, proto->p_proto, TCP_KEEPINTVL, &optval, optlen);
if (r < 0) {
syslog(LOG_ERR, "unable to setsocketopt(TCP_KEEPINTVL): %m");
}
}
#endif
}
} else {
syslog(LOG_ERR, "unable to getprotobyname(\"tcp\"): %m");
}
}
#ifdef HAVE_ZLIB
/* Does the backend support compression? */
if (CAPA(sync_backend, CAPA_COMPRESS)) {
prot_printf(sync_backend->out, "%s\r\n",
sync_backend->prot->u.std.compress_cmd.cmd);
prot_flush(sync_backend->out);
if (sync_parse_response("COMPRESS", sync_backend->in, NULL)) {
if (do_compress) fatal("Failed to enable compression, aborting", EC_SOFTWARE);
syslog(LOG_NOTICE, "Failed to enable compression, continuing uncompressed");
}
else {
prot_setcompress(sync_backend->in);
prot_setcompress(sync_backend->out);
}
}
else if (do_compress) fatal("Backend does not support compression, aborting", EC_SOFTWARE);
#endif
/* links to sockets */
sync_in = sync_backend->in;
sync_out = sync_backend->out;
if (verbose > 1) {
prot_setlog(sync_in, fileno(stderr));
prot_setlog(sync_out, fileno(stderr));
}
/* Set inactivity timer */
timeout = config_getint(IMAPOPT_SYNC_TIMEOUT);
if (timeout < 3) timeout = 3;
prot_settimeout(sync_in, timeout);
/* Force use of LITERAL+ so we don't need two way communications */
prot_setisclient(sync_in, 1);
prot_setisclient(sync_out, 1);
}
static void replica_connect(const char *channel)
{
int wait;
sasl_callback_t *cb;
int timeout;
const char *port, *auth_status = NULL;
cb = mysasl_callbacks(NULL,
get_config(channel, "sync_authname"),
get_config(channel, "sync_realm"),
get_config(channel, "sync_password"));
/* get the right port */
port = get_config(channel, "sync_port");
if (port) {
imap_csync_protocol.service = port;
csync_protocol.service = port;
}
for (wait = 15;; wait *= 2) {
sync_backend = backend_connect(sync_backend, servername,
&imap_csync_protocol, "", cb, &auth_status,
(verbose > 1 ? fileno(stderr) : -1));
if (sync_backend) {
if (sync_backend->capability & CAPA_REPLICATION) {
/* attach our IMAP tag buffer to our protstreams as userdata */
sync_backend->in->userdata = sync_backend->out->userdata = &tagbuf;
break;
}
else {
backend_disconnect(sync_backend);
sync_backend = NULL;
}
}
sync_backend = backend_connect(sync_backend, servername,
&csync_protocol, "", cb, NULL,
(verbose > 1 ? fileno(stderr) : -1));
if (sync_backend || auth_status || connect_once || wait > 1000) break;
fprintf(stderr,
"Can not connect to server '%s', retrying in %d seconds\n",
servername, wait);
sleep(wait);
}
free_callbacks(cb);
cb = NULL;
if (!sync_backend) {
fprintf(stderr, "Can not connect to server '%s'\n",
servername);
syslog(LOG_ERR, "Can not connect to server '%s'", servername);
_exit(1);
}
if (servername[0] != '/' && sync_backend->sock >= 0) {
tcp_disable_nagle(sync_backend->sock);
tcp_enable_keepalive(sync_backend->sock);
}
#ifdef HAVE_ZLIB
/* Does the backend support compression? */
if (CAPA(sync_backend, CAPA_COMPRESS)) {
prot_printf(sync_backend->out, "%s\r\n",
sync_backend->prot->u.std.compress_cmd.cmd);
prot_flush(sync_backend->out);
if (sync_parse_response("COMPRESS", sync_backend->in, NULL)) {
if (do_compress) fatal("Failed to enable compression, aborting", EC_SOFTWARE);
syslog(LOG_NOTICE, "Failed to enable compression, continuing uncompressed");
}
else {
prot_setcompress(sync_backend->in);
prot_setcompress(sync_backend->out);
}
}
else if (do_compress) fatal("Backend does not support compression, aborting", EC_SOFTWARE);
#endif
/* links to sockets */
sync_in = sync_backend->in;
sync_out = sync_backend->out;
if (verbose > 1) {
prot_setlog(sync_in, fileno(stderr));
prot_setlog(sync_out, fileno(stderr));
}
/* Set inactivity timer */
timeout = config_getint(IMAPOPT_SYNC_TIMEOUT);
if (timeout < 3) timeout = 3;
prot_settimeout(sync_in, timeout);
/* Force use of LITERAL+ so we don't need two way communications */
prot_setisclient(sync_in, 1);
prot_setisclient(sync_out, 1);
}
/* Handle backend state transitions:
*
* The backend state starts in InitWait and the following transitions are
* allowed.
*
* InitWait -> Connected
*
* ^ \ |
* | \ |
* | \ |
* | \ |
* | \ |
* | \ |
* | V V
*
* Closed <-> Closing
*
* The state argument specifies the eventual state of the backend and the
* function transitions to that state via the shortest path.
*/
static void set_backend_state(struct backend_info *be,
enum xenbus_state state)
{
while (be->state != state) {
switch (be->state) {
case XenbusStateClosed:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
pr_info("%s: prepare for reconnect\n",
be->dev->nodename);
backend_switch_state(be, XenbusStateInitWait);
break;
case XenbusStateClosing:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateInitWait:
switch (state) {
case XenbusStateConnected:
backend_connect(be);
backend_switch_state(be, XenbusStateConnected);
break;
case XenbusStateClosing:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateConnected:
switch (state) {
case XenbusStateInitWait:
case XenbusStateClosing:
case XenbusStateClosed:
backend_disconnect(be);
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateClosing:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosed);
break;
default:
BUG();
}
break;
default:
BUG();
}
}
}
static struct backend *restore_connect(const char *servername,
struct buf *tagbuf,
const struct restore_options *options)
{
struct backend *backend = NULL;
sasl_callback_t *cb;
int timeout;
const char *auth_status = NULL;
cb = mysasl_callbacks(NULL,
config_getstring(IMAPOPT_RESTORE_AUTHNAME),
config_getstring(IMAPOPT_RESTORE_REALM),
config_getstring(IMAPOPT_RESTORE_PASSWORD));
/* try to connect over IMAP */
backend = backend_connect(backend, servername,
&imap_csync_protocol, "", cb, &auth_status,
(options->verbose > 1 ? fileno(stderr) : -1));
if (backend) {
if (backend->capability & CAPA_REPLICATION) {
/* attach our IMAP tag buffer to our protstreams as userdata */
backend->in->userdata = backend->out->userdata = tagbuf;
}
else {
backend_disconnect(backend);
backend = NULL;
}
}
/* if that didn't work, fall back to csync */
if (!backend) {
backend = backend_connect(backend, servername,
&csync_protocol, "", cb, NULL,
(options->verbose > 1 ? fileno(stderr) : -1));
}
free_callbacks(cb);
cb = NULL;
if (!backend) {
fprintf(stderr, "Can not connect to server '%s'\n", servername);
syslog(LOG_ERR, "Can not connect to server '%s'", servername);
return NULL;
}
if (servername[0] != '/' && backend->sock >= 0) {
tcp_disable_nagle(backend->sock);
tcp_enable_keepalive(backend->sock);
}
#ifdef HAVE_ZLIB
/* Does the backend support compression? */
if (CAPA(backend, CAPA_COMPRESS)) {
prot_printf(backend->out, "%s\r\n",
backend->prot->u.std.compress_cmd.cmd);
prot_flush(backend->out);
if (sync_parse_response("COMPRESS", backend->in, NULL)) {
if (options->require_compression)
fatal("Failed to enable compression, aborting", EX_SOFTWARE);
syslog(LOG_NOTICE, "Failed to enable compression, continuing uncompressed");
}
else {
prot_setcompress(backend->in);
prot_setcompress(backend->out);
}
}
else if (options->require_compression) {
fatal("Backend does not support compression, aborting", EX_SOFTWARE);
}
#endif
if (options->verbose > 1) {
/* XXX did we do this during backend_connect already? */
prot_setlog(backend->in, fileno(stderr));
prot_setlog(backend->out, fileno(stderr));
}
/* Set inactivity timer */
timeout = config_getint(IMAPOPT_SYNC_TIMEOUT);
if (timeout < 3) timeout = 3;
prot_settimeout(backend->in, timeout);
/* Force use of LITERAL+ so we don't need two way communications */
prot_setisclient(backend->in, 1);
prot_setisclient(backend->out, 1);
return backend;
}
