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);
}
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;
}
