#include "sm.h"
int sm_sx_callback(sx_t s, sx_event_t e, void *data, void *arg) {
sm_t sm = (sm_t) arg;
sx_buf_t buf = (sx_buf_t) data;
sx_error_t *sxe;
nad_t nad;
pkt_t pkt;
int len, ns, elem, attr;
switch(e) {
case event_WANT_READ:
log_debug(ZONE, "want read");
mio_read(sm->mio, sm->fd);
break;
case event_WANT_WRITE:
log_debug(ZONE, "want write");
mio_write(sm->mio, sm->fd);
break;
case event_READ:
log_debug(ZONE, "reading from %d", sm->fd);
len = recv(sm->fd, buf->data, buf->len, 0);
if(len < 0) {
if(errno == EWOULDBLOCK || errno == EINTR || errno == EAGAIN) {
buf->len = 0;
return 0;
}
log_write(sm->log, LOG_NOTICE, "[%d] [router] read error: %s (%d)", sm->fd, strerror(errno), errno);
sx_kill(s);
return -1;
}
else if(len == 0) {
sx_kill(s);
return -1;
}
log_debug(ZONE, "read %d bytes", len);
buf->len = len;
return len;
case event_WRITE:
log_debug(ZONE, "writing to %d", sm->fd);
len = send(sm->fd, buf->data, buf->len, 0);
if(len >= 0) {
log_debug(ZONE, "%d bytes written", len);
return len;
}
if(errno == EWOULDBLOCK || errno == EINTR || errno == EAGAIN)
return 0;
log_write(sm->log, LOG_NOTICE, "[%d] [router] write error: %s (%d)", sm->fd, strerror(errno), errno);
sx_kill(s);
return -1;
case event_ERROR:
sxe = (sx_error_t *) data;
log_write(sm->log, LOG_NOTICE, "error from router: %s (%s)", sxe->generic, sxe->specific);
if(sxe->code == SX_ERR_AUTH)
sx_close(s);
break;
case event_STREAM:
break;
case event_OPEN:
log_write(sm->log, LOG_NOTICE, "connection to router established");
sm->retry_left = sm->retry_init;
nad = nad_new(sm->router->nad_cache);
ns = nad_add_namespace(nad, uri_COMPONENT, NULL);
nad_append_elem(nad, ns, "bind", 0);
nad_append_attr(nad, -1, "name", sm->id);
log_debug(ZONE, "requesting component bind for '%s'", sm->id);
sx_nad_write(sm->router, nad);
break;
case event_PACKET:
nad = (nad_t) data;
if(NAD_ENS(nad, 0) < 0) {
nad_free(nad);
return 0;
}
if(s->state == state_STREAM) {
if(NAD_NURI_L(nad, NAD_ENS(nad, 0)) != strlen(uri_STREAMS) || strncmp(uri_STREAMS, NAD_NURI(nad, NAD_ENS(nad, 0)), strlen(uri_STREAMS)) != 0 || NAD_ENAME_L(nad, 0) != 8 || strncmp("features", NAD_ENAME(nad, 0), 8) != 0) {
log_debug(ZONE, "got a non-features packet on an unauth'd stream, dropping");
nad_free(nad);
return 0;
}
#ifdef HAVE_SSL
if(sm->sx_ssl != NULL && s->ssf == 0) {
ns = nad_find_scoped_namespace(nad, uri_TLS, NULL);
if(ns >= 0) {
elem = nad_find_elem(nad, 0, ns, "starttls", 1);
if(elem >= 0) {
if(sx_ssl_client_starttls(sm->sx_ssl, s, NULL) == 0) {
nad_free(nad);
return 0;
}
log_write(sm->log, LOG_NOTICE, "unable to establish encrypted session with router");
}
}
}
#endif
sx_sasl_auth(sm->sx_sasl, s, "jabberd-router", "DIGEST-MD5", sm->router_user, sm->router_pass);
nad_free(nad);
return 0;
}
if(s->state == state_OPEN && !sm->online) {
if(NAD_NURI_L(nad, NAD_ENS(nad, 0)) != strlen(uri_COMPONENT) || strncmp(uri_COMPONENT, NAD_NURI(nad, NAD_ENS(nad, 0)), strlen(uri_COMPONENT)) != 0 || NAD_ENAME_L(nad, 0) != 4 || strncmp("bind", NAD_ENAME(nad, 0), 4)) {
log_debug(ZONE, "got a packet from router, but we're not online, dropping");
nad_free(nad);
return 0;
}
attr = nad_find_attr(nad, 0, -1, "error", NULL);
if(attr >= 0) {
log_write(sm->log, LOG_NOTICE, "router refused bind request (%.*s)", NAD_AVAL_L(nad, attr), NAD_AVAL(nad, attr));
exit(1);
}
log_debug(ZONE, "coming online");
sm->online = sm->started = 1;
log_write(sm->log, LOG_NOTICE, "ready for sessions", sm->id);
nad_free(nad);
return 0;
}
log_debug(ZONE, "got a packet");
pkt = pkt_new(sm, (nad_t) data);
if(pkt == NULL) {
log_debug(ZONE, "invalid packet, dropping");
nad_free(nad);
return 0;
}
dispatch(sm, pkt);
return 0;
case event_CLOSED:
mio_close(sm->mio, sm->fd);
break;
}
return 0;
}
int sm_mio_callback(mio_t m, mio_action_t a, int fd, void *data, void *arg) {
sm_t sm = (sm_t) arg;
int nbytes;
switch(a) {
case action_READ:
log_debug(ZONE, "read action on fd %d", fd);
ioctl(fd, FIONREAD, &nbytes);
if(nbytes == 0) {
sx_kill(sm->router);
return 0;
}
return sx_can_read(sm->router);
case action_WRITE:
log_debug(ZONE, "write action on fd %d", fd);
return sx_can_write(sm->router);
case action_CLOSE:
log_debug(ZONE, "close action on fd %d", fd);
log_write(sm->log, LOG_NOTICE, "connection to router closed");
sm_lost_router = 1;
sm->online = 0;
break;
case action_ACCEPT:
break;
}
return 0;
}
void sm_timestamp(time_t t, char timestamp[18])
{
struct tm *gm = gmtime(&t);
snprintf(timestamp, 18, "%d%02d%02dT%02d:%02d:%02d", 1900 + gm->tm_year,
gm->tm_mon + 1, gm->tm_mday, gm->tm_hour, gm->tm_min, gm->tm_sec);
return;
}
void sm_c2s_action(sess_t dest, char *action, char *target) {
nad_t nad;
int rns, sns;
nad = nad_new(dest->user->sm->router->nad_cache);
rns = nad_add_namespace(nad, uri_COMPONENT, NULL);
nad_append_elem(nad, rns, "route", 0);
nad_append_attr(nad, -1, "to", dest->c2s);
nad_append_attr(nad, -1, "from", dest->user->sm->id);
sns = nad_add_namespace(nad, uri_SESSION, "sc");
nad_append_elem(nad, sns, "session", 1);
if(dest->c2s_id[0] != '\0')
nad_append_attr(nad, sns, "c2s", dest->c2s_id);
if(dest->sm_id[0] != '\0')
nad_append_attr(nad, sns, "sm", dest->sm_id);
nad_append_attr(nad, -1, "action", action);
if(target != NULL)
nad_append_attr(nad, -1, "target", target);
log_debug(ZONE, "routing nad to %s from %s c2s %s s2s %s action %s target %s", dest->c2s, dest->user->sm->id, dest->c2s_id, dest->sm_id, action, target);
sx_nad_write(dest->user->sm->router, nad);
}
void sm_signature(sm_t sm, char *str) {
if(sm->siglen == 0) {
snprintf(&sm->signature[sm->siglen], 2048 - sm->siglen, "%s", str);
sm->siglen += strlen(str);
} else {
snprintf(&sm->signature[sm->siglen], 2048 - sm->siglen, " %s", str);
sm->siglen += strlen(str) + 1;
}
}