/* always deliver threads */
static void js_outgoing_packet(jsmi si, jpacket jp, dpacket p)
{
session s = NULL;
udata u;
/* attempt to locate the session by matching the special resource */
u = js_user(si, p->id, 0);
if (u == NULL) {
log_notice(p->host,
"Bouncing packet intended for nonexistant user: %s",
xmlnode2str(p->x));
deliver_fail(dpacket_new(p->x), "Invalid User");
return;
}
SEM_LOCK(u->sem);
for (s = u->sessions; s != NULL; s = s->next)
if (j_strcmp(p->id->resource, s->route->resource) == 0)
break;
SEM_UNLOCK(u->sem);
THREAD_DEC(u->ref);
if (s != NULL) { /* just pass to the session normally */
js_session_from(s, jp);
return;
}
log_notice(p->host, "Bouncing %s packet intended for session %s",
xmlnode_get_name(jp->x), jid_full(p->id));
deliver_fail(dpacket_new(p->x), "Invalid Session");
}
/* Hostname lookup requested */
void dnsrv_lookup(dns_io d, dpacket p)
{
dns_packet_list l, lnew;
xmlnode req;
char *reqs;
/* make sure we have a child! */
if(d->out <= 0)
{
deliver_fail(p, "DNS Resolver Error");
return;
}
/* Attempt to lookup this hostname in the packet table */
l = (dns_packet_list)xhash_get(d->packet_table, p->host);
/* IF: hashtable has the hostname, a lookup is already pending,
so push the packet on the top of the list (most recent at the top) */
if (l != NULL)
{
log_debug(ZONE, "dnsrv: Adding lookup request for %s to pending queue.", p->host);
lnew = pmalloco(p->p, sizeof(_dns_packet_list));
lnew->packet = p;
lnew->stamp = time(NULL);
lnew->next = l;
xhash_put(d->packet_table, p->host, lnew);
return;
}
/* insert the packet into the packet_table using the hostname
as the key and send a request to the coprocess */
log_debug(ZONE, "dnsrv: Creating lookup request queue for %s", p->host);
l = pmalloco(p->p, sizeof(_dns_packet_list));
l->packet = p;
l->stamp = time(NULL);
xhash_put(d->packet_table, p->host, l);
req = xmlnode_new_tag_pool(p->p,"host");
xmlnode_insert_cdata(req,p->host,-1);
reqs = xmlnode2str(req);
log_debug(ZONE, "dnsrv: Transmitting lookup request: %s", reqs);
pth_write(d->out, reqs, strlen(reqs));
}
/* callback for walking the connecting hash tree */
void _dnsrv_beat_packets(xht h, const char *key, void *data, void *arg)
{
dns_io di = (dns_io)arg;
dns_packet_list n, l = (dns_packet_list)data;
int now = time(NULL);
int reap = 0;
/* first, check the head */
if((now - l->stamp) > di->packet_timeout)
{
log_notice(l->packet->host,"timed out from dnsrv queue");
xhash_zap(di->packet_table,l->packet->host);
reap = 1;
}else{
while(l->next != NULL)
{
if((now - l->next->stamp) > di->packet_timeout)
{
reap = 1;
n = l->next;
l->next = NULL; /* chop off packets to be killed */
l = n;
break;
}
l = l->next;
}
}
if(reap == 0) return;
/* time out individual queue'd packets */
while(l != NULL)
{
n = l->next;
deliver_fail(l->packet,"Hostname Resolution Timeout");
l = n;
}
}
/* any thread */
result js_packet(instance i, dpacket p, void *arg)
{
jsmi si = (jsmi) arg;
jpacket jp = NULL;
session s = NULL;
packet_thread_p pt;
udata u;
char *type, *authto;
log_debug("incoming packet %s", xmlnode2str(p->x));
/* if this is a routed packet */
if (p->type == p_ROUTE) {
type = xmlnode_get_attrib(p->x, "type");
/* new session requests */
if (j_strcmp(type, "session") == 0) {
js_session_new_mtq(si, p);
return r_DONE;
}
/* get the internal jpacket */
if (xmlnode_get_firstchild(p->x) != NULL) /* XXX old libjabber jpacket_new() wasn't null safe, this is just safety */
jp = jpacket_new(xmlnode_get_firstchild(p->x));
/* auth/reg requests */
if (jp != NULL && j_strcmp(type, "auth") == 0) {
/* check and see if we're configured to forward auth packets for processing elsewhere */
if ((authto =
xmlnode_get_data(js_config(si, "auth"))) !=
NULL) {
xmlnode_put_attrib(p->x, "oto", xmlnode_get_attrib(p->x, "to")); /* preserve original to */
xmlnode_put_attrib(p->x, "to", authto);
deliver(dpacket_new(p->x), i);
return r_DONE;
}
/* internally, hide the route to/from addresses on the authreg request */
xmlnode_put_attrib(jp->x, "to",
xmlnode_get_attrib(p->x, "to"));
xmlnode_put_attrib(jp->x, "from",
xmlnode_get_attrib(p->x,
"from"));
xmlnode_put_attrib(jp->x, "route",
xmlnode_get_attrib(p->x,
"type"));
jpacket_reset(jp);
jp->aux1 = (void *) si;
pt = pmalloco(jp->p, sizeof(packet_thread_t));
pt->jp = jp;
fast_mtq_send(si->mtq_authreg, pt);
return r_DONE;
}
/* if it's an error */
if (j_strcmp(type, "error") == 0) {
/* look for users online */
u = js_user(si, p->id, 1);
if (u == NULL) {
/* if this was a message,
it should have been delievered to that session, store offline */
if (jp != NULL
&& jp->type == JPACKET_MESSAGE) {
pt = pmalloco(jp->p,
sizeof
(packet_thread_t));
pt->jp = jp;
fast_mtq_send(si->mtq_deliver, pt);
return r_DONE;
}
xmlnode_free(p->x);
return r_DONE;
/*
log_notice(p->host,
"Bouncing packet intended for nonexistant user: %s",
xmlnode2str(p->x));
deliver_fail(dpacket_new(p->x), "Invalid User");
return r_DONE;
*/
}
if (p->id->resource != NULL) {
SEM_LOCK(u->sem);
for (s = u->sessions; s != NULL;
s = s->next)
if (j_strcmp
(p->id->resource,
s->route->resource) == 0)
break;
SEM_UNLOCK(u->sem);
if (s != NULL) {
s->sid = NULL; /* they generated the error,
no use in sending there anymore! */
js_session_end(s, "Disconnected");
}
} else {
session temp;
/* a way to boot an entire user off */
SEM_LOCK(u->sem);
for (s = u->sessions; s != NULL;) {
temp = s;
s = s->next;
js_session_end_nosem(temp,
"Removed");
}
u->pass = NULL; /* so they can't log back in */
SEM_UNLOCK(u->sem);
xmlnode_free(p->x);
THREAD_DEC(u->ref);
return r_DONE;
}
THREAD_DEC(u->ref);
/* if this was a message,
it should have been delievered to that session, store offline */
if (jp != NULL && jp->type == JPACKET_MESSAGE) {
pt = pmalloco(jp->p,
sizeof(packet_thread_t));
pt->jp = jp;
fast_mtq_send(si->mtq_deliver, pt);
return r_DONE;
}
/* drop and return */
if (xmlnode_get_firstchild(p->x) != NULL)
log_notice(p->host,
"Dropping a bounced session packet to %s",
jid_full(p->id));
xmlnode_free(p->x);
return r_DONE;
}
/* uhh, empty packet, *shrug* */
if (jp == NULL) {
log_notice(p->host,
"Dropping an invalid or empty route packet: %s",
xmlnode2str(p->x), jid_full(p->id));
xmlnode_free(p->x);
return r_DONE;
}
/* ============================================================== */
/* attempt to locate the session by matching the special resource */
u = js_user(si, p->id, 1);
if (u == NULL) {
/* only when route packet to users not online */
pt = pmalloco(p->p, sizeof(packet_thread_t));
pt->p = p;
pt->jp = jp;
fast_mtq_send(si->mtq_deliver, pt);
return r_DONE;
}
/* user is online :) */
SEM_LOCK(u->sem);
for (s = u->sessions; s != NULL; s = s->next)
if (j_strcmp(p->id->resource, s->route->resource)
== 0)
break;
SEM_UNLOCK(u->sem);
THREAD_DEC(u->ref);
if (s != NULL) { /* just pass to the session normally */
js_session_from(s, jp);
return r_DONE;
}
log_notice(p->host,
"Bouncing %s packet intended for session %s",
xmlnode_get_name(jp->x), jid_full(p->id));
deliver_fail(dpacket_new(p->x), "Invalid Session");
return r_DONE;
}
/* normal server-server packet, should we make sure it's not spoofing us? if so, if ghash_get(p->to->server) then bounce w/ security error */
jp = jpacket_new(p->x);
if (jp == NULL) {
log_warn(p->host, "Dropping invalid incoming packet: %s",
xmlnode2str(p->x));
xmlnode_free(p->x);
return r_DONE;
}
pt = pmalloco(jp->p, sizeof(packet_thread_t));
pt->jp = jp;
fast_mtq_send(si->mtq_deliver, pt);
return r_DONE;
}
