5 * Does all this gloriously nifty connection handling stuff...
13 #include <sys/socket.h>
14 #include <netinet/in.h>
18 * Clears out connection list, killing remaining connections.
20 faim_internal void aim_connrst(struct aim_session_t *sess)
22 faim_mutex_init(&sess->connlistlock);
24 struct aim_conn_t *cur = sess->connlist, *tmp;
33 sess->connlist = NULL;
38 * Gets a new connection structure.
40 faim_internal struct aim_conn_t *aim_conn_getnext(struct aim_session_t *sess)
42 struct aim_conn_t *newconn, *cur;
44 if (!(newconn = malloc(sizeof(struct aim_conn_t))))
47 memset(newconn, 0, sizeof(struct aim_conn_t));
48 aim_conn_close(newconn);
51 faim_mutex_lock(&sess->connlistlock);
52 if (sess->connlist == NULL)
53 sess->connlist = newconn;
55 for (cur = sess->connlist; cur->next; cur = cur->next)
59 faim_mutex_unlock(&sess->connlistlock);
64 static void aim_conn_init(struct aim_conn_t *deadconn)
70 deadconn->subtype = -1;
73 deadconn->lastactivity = 0;
74 deadconn->forcedlatency = 0;
75 deadconn->handlerlist = NULL;
76 deadconn->priv = NULL;
77 faim_mutex_init(&deadconn->active);
78 faim_mutex_init(&deadconn->seqnum_lock);
83 faim_export void aim_conn_kill(struct aim_session_t *sess, struct aim_conn_t **deadconn)
85 struct aim_conn_t *cur;
87 if (!deadconn || !*deadconn)
90 faim_mutex_lock(&sess->connlistlock);
91 if (sess->connlist == NULL)
93 else if (sess->connlist->next == NULL) {
94 if (sess->connlist == *deadconn)
95 sess->connlist = NULL;
99 if (cur->next == *deadconn) {
100 cur->next = cur->next->next;
106 faim_mutex_unlock(&sess->connlistlock);
108 /* XXX: do we need this for txqueue too? */
109 aim_rxqueue_cleanbyconn(sess, *deadconn);
111 aim_conn_close(*deadconn);
112 if ((*deadconn)->priv)
113 free((*deadconn)->priv);
120 faim_export void aim_conn_close(struct aim_conn_t *deadconn)
122 int typesav = -1, subtypesav = -1;
123 void *privsav = NULL;
125 faim_mutex_destroy(&deadconn->active);
126 faim_mutex_destroy(&deadconn->seqnum_lock);
127 if (deadconn->fd >= 3)
129 if (deadconn->handlerlist)
130 aim_clearhandlers(deadconn);
132 typesav = deadconn->type;
133 subtypesav = deadconn->subtype;
135 if (deadconn->priv && (deadconn->type != AIM_CONN_TYPE_RENDEZVOUS)) {
136 free(deadconn->priv);
137 deadconn->priv = NULL;
139 privsav = deadconn->priv;
141 aim_conn_init(deadconn);
143 deadconn->type = typesav;
144 deadconn->subtype = subtypesav;
145 deadconn->priv = privsav;
150 faim_internal struct aim_conn_t *aim_getconn_type(struct aim_session_t *sess,
153 struct aim_conn_t *cur;
155 faim_mutex_lock(&sess->connlistlock);
156 for (cur = sess->connlist; cur; cur = cur->next) {
157 if (cur->type == type)
160 faim_mutex_unlock(&sess->connlistlock);
165 * aim_newconn(type, dest)
167 * Opens a new connection to the specified dest host of type type.
169 * TODO: fix for proxies
170 * FIXME: Return errors in a more sane way.
173 faim_export struct aim_conn_t *aim_newconn(struct aim_session_t *sess,
174 int type, char *dest)
176 struct aim_conn_t *connstruct;
178 struct sockaddr_in sa;
180 u_short port = FAIM_LOGIN_PORT;
184 if ((connstruct=aim_conn_getnext(sess))==NULL)
187 faim_mutex_lock(&connstruct->active);
189 connstruct->type = type;
191 if (!dest) { /* just allocate a struct */
193 connstruct->status = 0;
194 faim_mutex_unlock(&connstruct->active);
199 * As of 23 Jul 1999, AOL now sends the port number, preceded by a
200 * colon, in the BOS redirect. This fatally breaks all previous
201 * libfaims. Bad, bad AOL.
203 * We put this here to catch every case.
207 for(i=0;i<(int)strlen(dest);i++) {
208 if (dest[i] == ':') {
209 port = atoi(&(dest[i+1]));
213 host = (char *)malloc(i+1);
214 strncpy(host, dest, i);
217 hp = gethostbyname(host);
221 connstruct->status = (h_errno | AIM_CONN_STATUS_RESOLVERR);
222 faim_mutex_unlock(&connstruct->active);
226 memset(&sa.sin_zero, 0, 8);
227 sa.sin_port = htons(port);
228 memcpy(&sa.sin_addr, hp->h_addr, hp->h_length);
229 sa.sin_family = hp->h_addrtype;
231 connstruct->fd = socket(hp->h_addrtype, SOCK_STREAM, 0);
232 ret = connect(connstruct->fd, (struct sockaddr *)&sa, sizeof(struct sockaddr_in));
235 connstruct->status = (errno | AIM_CONN_STATUS_CONNERR);
236 faim_mutex_unlock(&connstruct->active);
240 faim_mutex_unlock(&connstruct->active);
245 faim_export int aim_conngetmaxfd(struct aim_session_t *sess)
248 struct aim_conn_t *cur;
250 faim_mutex_lock(&sess->connlistlock);
251 for (cur = sess->connlist; cur; cur = cur->next) {
255 faim_mutex_unlock(&sess->connlistlock);
260 static int aim_countconn(struct aim_session_t *sess)
263 struct aim_conn_t *cur;
265 faim_mutex_lock(&sess->connlistlock);
266 for (cur = sess->connlist; cur; cur = cur->next)
268 faim_mutex_unlock(&sess->connlistlock);
274 * aim_select(timeout)
276 * Waits for a socket with data or for timeout, whichever comes first.
279 * Return codes in *status:
280 * -1 error in select() (NULL returned)
281 * 0 no events pending (NULL returned)
282 * 1 outgoing data pending (NULL returned)
283 * 2 incoming data pending (connection with pending data returned)
285 * XXX: we could probably stand to do a little courser locking here.
288 faim_export struct aim_conn_t *aim_select(struct aim_session_t *sess,
289 struct timeval *timeout, int *status)
291 struct aim_conn_t *cur;
296 faim_mutex_lock(&sess->connlistlock);
297 if (sess->connlist == NULL) {
298 faim_mutex_unlock(&sess->connlistlock);
302 faim_mutex_unlock(&sess->connlistlock);
305 * If we have data waiting to be sent, return immediatly
307 if (sess->queue_outgoing != NULL) {
315 faim_mutex_lock(&sess->connlistlock);
316 for (cur = sess->connlist; cur; cur = cur->next) {
317 FD_SET(cur->fd, &fds);
321 faim_mutex_unlock(&sess->connlistlock);
323 if ((i = select(maxfd+1, &fds, NULL, NULL, timeout))>=1) {
324 faim_mutex_lock(&sess->connlistlock);
325 for (cur = sess->connlist; cur; cur = cur->next) {
326 if (FD_ISSET(cur->fd, &fds)) {
328 faim_mutex_unlock(&sess->connlistlock);
332 *status = 0; /* shouldn't happen */
333 } else if ((i == -1) && (errno == EINTR)) /* treat interrupts as a timeout */
336 *status = i; /* can be 0 or -1 */
338 faim_mutex_unlock(&sess->connlistlock);
339 return NULL; /* no waiting or error, return */
342 faim_export int aim_conn_isready(struct aim_conn_t *conn)
345 return (conn->status & 0x0001);
349 faim_export int aim_conn_setstatus(struct aim_conn_t *conn, int status)
356 faim_mutex_lock(&conn->active);
357 val = conn->status ^= status;
358 faim_mutex_unlock(&conn->active);
362 faim_export int aim_conn_setlatency(struct aim_conn_t *conn, int newval)
367 faim_mutex_lock(&conn->active);
368 conn->forcedlatency = newval;
369 conn->lastactivity = 0; /* reset this just to make sure */
370 faim_mutex_unlock(&conn->active);
375 faim_export void aim_session_init(struct aim_session_t *sess)
380 memset(sess, 0, sizeof(struct aim_session_t));
382 sess->queue_outgoing = NULL;
383 sess->queue_incoming = NULL;
384 sess->pendingjoin = NULL;
385 aim_initsnachash(sess);
386 sess->snac_nextid = 0x00000001;
389 * This must always be set. Default to the queue-based
390 * version for back-compatibility.
392 sess->tx_enqueue = &aim_tx_enqueue__queuebased;