5 * Does all this gloriously nifty connection handling stuff...
12 #include <sys/socket.h>
13 #include <netinet/in.h>
16 * Clears out connection list, killing remaining connections.
18 faim_internal void aim_connrst(struct aim_session_t *sess)
20 faim_mutex_init(&sess->connlistlock);
22 struct aim_conn_t *cur = sess->connlist, *tmp;
31 sess->connlist = NULL;
36 * Gets a new connection structure.
38 faim_internal struct aim_conn_t *aim_conn_getnext(struct aim_session_t *sess)
40 struct aim_conn_t *newconn, *cur;
42 if (!(newconn = malloc(sizeof(struct aim_conn_t))))
45 memset(newconn, 0, sizeof(struct aim_conn_t));
46 aim_conn_close(newconn);
49 faim_mutex_lock(&sess->connlistlock);
50 if (sess->connlist == NULL)
51 sess->connlist = newconn;
53 for (cur = sess->connlist; cur->next; cur = cur->next)
57 faim_mutex_unlock(&sess->connlistlock);
62 static void aim_conn_init(struct aim_conn_t *deadconn)
68 deadconn->subtype = -1;
71 deadconn->lastactivity = 0;
72 deadconn->forcedlatency = 0;
73 deadconn->handlerlist = NULL;
74 deadconn->priv = NULL;
75 faim_mutex_init(&deadconn->active);
76 faim_mutex_init(&deadconn->seqnum_lock);
81 faim_export void aim_conn_kill(struct aim_session_t *sess, struct aim_conn_t **deadconn)
83 struct aim_conn_t *cur;
85 if (!deadconn || !*deadconn)
88 faim_mutex_lock(&sess->connlistlock);
89 if (sess->connlist == NULL)
91 else if (sess->connlist->next == NULL) {
92 if (sess->connlist == *deadconn)
93 sess->connlist = NULL;
97 if (cur->next == *deadconn) {
98 cur->next = cur->next->next;
104 faim_mutex_unlock(&sess->connlistlock);
106 /* XXX: do we need this for txqueue too? */
107 aim_rxqueue_cleanbyconn(sess, *deadconn);
109 aim_conn_close(*deadconn);
110 if ((*deadconn)->priv)
111 free((*deadconn)->priv);
118 faim_export void aim_conn_close(struct aim_conn_t *deadconn)
120 int typesav = -1, subtypesav = -1;
121 void *privsav = NULL;
123 faim_mutex_destroy(&deadconn->active);
124 faim_mutex_destroy(&deadconn->seqnum_lock);
125 if (deadconn->fd >= 3)
127 if (deadconn->handlerlist)
128 aim_clearhandlers(deadconn);
130 typesav = deadconn->type;
131 subtypesav = deadconn->subtype;
133 if (deadconn->priv && (deadconn->type != AIM_CONN_TYPE_RENDEZVOUS)) {
134 free(deadconn->priv);
135 deadconn->priv = NULL;
137 privsav = deadconn->priv;
139 aim_conn_init(deadconn);
141 deadconn->type = typesav;
142 deadconn->subtype = subtypesav;
143 deadconn->priv = privsav;
148 faim_internal struct aim_conn_t *aim_getconn_type(struct aim_session_t *sess,
151 struct aim_conn_t *cur;
153 faim_mutex_lock(&sess->connlistlock);
154 for (cur = sess->connlist; cur; cur = cur->next) {
155 if (cur->type == type)
158 faim_mutex_unlock(&sess->connlistlock);
163 * aim_newconn(type, dest)
165 * Opens a new connection to the specified dest host of type type.
167 * TODO: fix for proxies
168 * FIXME: Return errors in a more sane way.
171 faim_export struct aim_conn_t *aim_newconn(struct aim_session_t *sess,
172 int type, char *dest)
174 struct aim_conn_t *connstruct;
176 struct sockaddr_in sa;
178 u_short port = FAIM_LOGIN_PORT;
182 if ((connstruct=aim_conn_getnext(sess))==NULL)
185 faim_mutex_lock(&connstruct->active);
187 connstruct->type = type;
189 if (!dest) { /* just allocate a struct */
191 connstruct->status = 0;
192 faim_mutex_unlock(&connstruct->active);
197 * As of 23 Jul 1999, AOL now sends the port number, preceded by a
198 * colon, in the BOS redirect. This fatally breaks all previous
199 * libfaims. Bad, bad AOL.
201 * We put this here to catch every case.
205 for(i=0;i<strlen(dest);i++) {
206 if (dest[i] == ':') {
207 port = atoi(&(dest[i+1]));
211 host = (char *)malloc(i+1);
212 strncpy(host, dest, i);
215 hp = gethostbyname(host);
219 connstruct->status = (h_errno | AIM_CONN_STATUS_RESOLVERR);
220 faim_mutex_unlock(&connstruct->active);
224 memset(&sa.sin_zero, 0, 8);
225 sa.sin_port = htons(port);
226 memcpy(&sa.sin_addr, hp->h_addr, hp->h_length);
227 sa.sin_family = hp->h_addrtype;
229 connstruct->fd = socket(hp->h_addrtype, SOCK_STREAM, 0);
230 ret = connect(connstruct->fd, (struct sockaddr *)&sa, sizeof(struct sockaddr_in));
233 connstruct->status = (errno | AIM_CONN_STATUS_CONNERR);
234 faim_mutex_unlock(&connstruct->active);
238 faim_mutex_unlock(&connstruct->active);
243 faim_export int aim_conngetmaxfd(struct aim_session_t *sess)
246 struct aim_conn_t *cur;
248 faim_mutex_lock(&sess->connlistlock);
249 for (cur = sess->connlist; cur; cur = cur->next) {
253 faim_mutex_unlock(&sess->connlistlock);
258 static int aim_countconn(struct aim_session_t *sess)
261 struct aim_conn_t *cur;
263 faim_mutex_lock(&sess->connlistlock);
264 for (cur = sess->connlist; cur; cur = cur->next)
266 faim_mutex_unlock(&sess->connlistlock);
272 * aim_select(timeout)
274 * Waits for a socket with data or for timeout, whichever comes first.
277 * Return codes in *status:
278 * -1 error in select() (NULL returned)
279 * 0 no events pending (NULL returned)
280 * 1 outgoing data pending (NULL returned)
281 * 2 incoming data pending (connection with pending data returned)
283 * XXX: we could probably stand to do a little courser locking here.
286 faim_export struct aim_conn_t *aim_select(struct aim_session_t *sess,
287 struct timeval *timeout, int *status)
289 struct aim_conn_t *cur;
294 faim_mutex_lock(&sess->connlistlock);
295 if (sess->connlist == NULL) {
296 faim_mutex_unlock(&sess->connlistlock);
300 faim_mutex_unlock(&sess->connlistlock);
303 * If we have data waiting to be sent, return immediatly
305 if (sess->queue_outgoing != NULL) {
313 faim_mutex_lock(&sess->connlistlock);
314 for (cur = sess->connlist; cur; cur = cur->next) {
315 FD_SET(cur->fd, &fds);
319 faim_mutex_unlock(&sess->connlistlock);
321 if ((i = select(maxfd+1, &fds, NULL, NULL, timeout))>=1) {
322 faim_mutex_lock(&sess->connlistlock);
323 for (cur = sess->connlist; cur; cur = cur->next) {
324 if (FD_ISSET(cur->fd, &fds)) {
326 faim_mutex_unlock(&sess->connlistlock);
330 *status = 0; /* shouldn't happen */
331 } else if ((i == -1) && (errno == EINTR)) /* treat interrupts as a timeout */
334 *status = i; /* can be 0 or -1 */
336 faim_mutex_unlock(&sess->connlistlock);
337 return NULL; /* no waiting or error, return */
340 faim_export int aim_conn_isready(struct aim_conn_t *conn)
343 return (conn->status & 0x0001);
347 faim_export int aim_conn_setstatus(struct aim_conn_t *conn, int status)
354 faim_mutex_lock(&conn->active);
355 val = conn->status ^= status;
356 faim_mutex_unlock(&conn->active);
360 faim_export int aim_conn_setlatency(struct aim_conn_t *conn, int newval)
365 faim_mutex_lock(&conn->active);
366 conn->forcedlatency = newval;
367 conn->lastactivity = 0; /* reset this just to make sure */
368 faim_mutex_unlock(&conn->active);
373 faim_export void aim_session_init(struct aim_session_t *sess)
378 memset(sess, 0, sizeof(struct aim_session_t));
380 sess->queue_outgoing = NULL;
381 sess->queue_incoming = NULL;
382 sess->pendingjoin = NULL;
383 aim_initsnachash(sess);
384 sess->snac_nextid = 0x00000001;
387 * This must always be set. Default to the queue-based
388 * version for back-compatibility.
390 sess->tx_enqueue = &aim_tx_enqueue__queuebased;