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Commit | Line | Data |
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1 | ||
2 | /* | |
3 | * aim_conn.c | |
4 | * | |
5 | * Does all this gloriously nifty connection handling stuff... | |
6 | * | |
7 | */ | |
8 | ||
9 | #include <faim/aim.h> | |
10 | ||
11 | /* | |
12 | * Clears out connection list, killing remaining connections. | |
13 | */ | |
14 | void aim_connrst(struct aim_session_t *sess) | |
15 | { | |
16 | faim_mutex_init(&sess->connlistlock, NULL); | |
17 | if (sess->connlist) { | |
18 | struct aim_conn_t *cur = sess->connlist, *tmp; | |
19 | ||
20 | while(cur) { | |
21 | tmp = cur->next; | |
22 | aim_conn_close(cur); | |
23 | free(cur); | |
24 | cur = tmp; | |
25 | } | |
26 | } | |
27 | sess->connlist = NULL; | |
28 | return; | |
29 | } | |
30 | ||
31 | /* | |
32 | * Gets a new connection structure. | |
33 | */ | |
34 | struct aim_conn_t *aim_conn_getnext(struct aim_session_t *sess) | |
35 | { | |
36 | struct aim_conn_t *newconn, *cur; | |
37 | ||
38 | if (!(newconn = malloc(sizeof(struct aim_conn_t)))) | |
39 | return NULL; | |
40 | ||
41 | memset(newconn, 0, sizeof(struct aim_conn_t)); | |
42 | aim_conn_close(newconn); | |
43 | newconn->next = NULL; | |
44 | ||
45 | faim_mutex_lock(&sess->connlistlock); | |
46 | if (sess->connlist == NULL) | |
47 | sess->connlist = newconn; | |
48 | else { | |
49 | for (cur = sess->connlist; cur->next; cur = cur->next) | |
50 | ; | |
51 | cur->next = newconn; | |
52 | } | |
53 | faim_mutex_unlock(&sess->connlistlock); | |
54 | ||
55 | return newconn; | |
56 | } | |
57 | ||
58 | void aim_conn_kill(struct aim_session_t *sess, struct aim_conn_t **deadconn) | |
59 | { | |
60 | struct aim_conn_t *cur; | |
61 | ||
62 | if (!deadconn || !*deadconn) | |
63 | return; | |
64 | ||
65 | faim_mutex_lock(&sess->connlistlock); | |
66 | if (sess->connlist == NULL) | |
67 | ; | |
68 | else if (sess->connlist->next == NULL) { | |
69 | if (sess->connlist == *deadconn) | |
70 | sess->connlist = NULL; | |
71 | } else { | |
72 | cur = sess->connlist; | |
73 | while (cur->next) { | |
74 | if (cur->next == *deadconn) { | |
75 | cur->next = cur->next->next; | |
76 | break; | |
77 | } | |
78 | cur = cur->next; | |
79 | } | |
80 | } | |
81 | faim_mutex_unlock(&sess->connlistlock); | |
82 | ||
83 | /* XXX: do we need this for txqueue too? */ | |
84 | aim_rxqueue_cleanbyconn(sess, *deadconn); | |
85 | ||
86 | aim_conn_close(*deadconn); | |
87 | free(*deadconn); | |
88 | deadconn = NULL; | |
89 | ||
90 | return; | |
91 | } | |
92 | ||
93 | void aim_conn_close(struct aim_conn_t *deadconn) | |
94 | { | |
95 | if (deadconn->fd >= 3) | |
96 | close(deadconn->fd); | |
97 | deadconn->fd = -1; | |
98 | deadconn->type = -1; | |
99 | deadconn->seqnum = 0; | |
100 | deadconn->lastactivity = 0; | |
101 | deadconn->forcedlatency = 0; | |
102 | if (deadconn->handlerlist) | |
103 | aim_clearhandlers(deadconn); | |
104 | deadconn->handlerlist = NULL; | |
105 | if (deadconn->priv) | |
106 | free(deadconn->priv); | |
107 | deadconn->priv = NULL; | |
108 | faim_mutex_init(&deadconn->active, NULL); | |
109 | faim_mutex_init(&deadconn->seqnum_lock, NULL); | |
110 | } | |
111 | ||
112 | struct aim_conn_t *aim_getconn_type(struct aim_session_t *sess, | |
113 | int type) | |
114 | { | |
115 | struct aim_conn_t *cur; | |
116 | ||
117 | faim_mutex_lock(&sess->connlistlock); | |
118 | for (cur = sess->connlist; cur; cur = cur->next) { | |
119 | if (cur->type == type) | |
120 | break; | |
121 | } | |
122 | faim_mutex_unlock(&sess->connlistlock); | |
123 | return cur; | |
124 | } | |
125 | ||
126 | /* | |
127 | * aim_newconn(type, dest) | |
128 | * | |
129 | * Opens a new connection to the specified dest host of type type. | |
130 | * | |
131 | * TODO: fix for proxies | |
132 | * FIXME: Return errors in a more sane way. | |
133 | * | |
134 | */ | |
135 | struct aim_conn_t *aim_newconn(struct aim_session_t *sess, | |
136 | int type, char *dest) | |
137 | { | |
138 | struct aim_conn_t *connstruct; | |
139 | int ret; | |
140 | struct sockaddr_in sa; | |
141 | struct hostent *hp; | |
142 | u_short port = FAIM_LOGIN_PORT; | |
143 | char *host = NULL; | |
144 | int i=0; | |
145 | ||
146 | if ((connstruct=aim_conn_getnext(sess))==NULL) | |
147 | return NULL; | |
148 | ||
149 | faim_mutex_lock(&connstruct->active); | |
150 | ||
151 | connstruct->type = type; | |
152 | ||
153 | if (!dest) { /* just allocate a struct */ | |
154 | connstruct->fd = -1; | |
155 | connstruct->status = 0; | |
156 | faim_mutex_unlock(&connstruct->active); | |
157 | return connstruct; | |
158 | } | |
159 | ||
160 | /* | |
161 | * As of 23 Jul 1999, AOL now sends the port number, preceded by a | |
162 | * colon, in the BOS redirect. This fatally breaks all previous | |
163 | * libfaims. Bad, bad AOL. | |
164 | * | |
165 | * We put this here to catch every case. | |
166 | * | |
167 | */ | |
168 | ||
169 | for(i=0;i<strlen(dest);i++) { | |
170 | if (dest[i] == ':') { | |
171 | port = atoi(&(dest[i+1])); | |
172 | break; | |
173 | } | |
174 | } | |
175 | host = (char *)malloc(i+1); | |
176 | strncpy(host, dest, i); | |
177 | host[i] = '\0'; | |
178 | ||
179 | hp = gethostbyname(host); | |
180 | free(host); | |
181 | ||
182 | if (hp == NULL) { | |
183 | connstruct->status = (h_errno | AIM_CONN_STATUS_RESOLVERR); | |
184 | faim_mutex_unlock(&connstruct->active); | |
185 | return connstruct; | |
186 | } | |
187 | ||
188 | memset(&sa.sin_zero, 0, 8); | |
189 | sa.sin_port = htons(port); | |
190 | memcpy(&sa.sin_addr, hp->h_addr, hp->h_length); | |
191 | sa.sin_family = hp->h_addrtype; | |
192 | ||
193 | connstruct->fd = socket(hp->h_addrtype, SOCK_STREAM, 0); | |
194 | ret = connect(connstruct->fd, (struct sockaddr *)&sa, sizeof(struct sockaddr_in)); | |
195 | if(ret < 0) { | |
196 | connstruct->fd = -1; | |
197 | connstruct->status = (errno | AIM_CONN_STATUS_CONNERR); | |
198 | faim_mutex_unlock(&connstruct->active); | |
199 | return connstruct; | |
200 | } | |
201 | ||
202 | faim_mutex_unlock(&connstruct->active); | |
203 | ||
204 | return connstruct; | |
205 | } | |
206 | ||
207 | int aim_conngetmaxfd(struct aim_session_t *sess) | |
208 | { | |
209 | int j = 0; | |
210 | struct aim_conn_t *cur; | |
211 | ||
212 | faim_mutex_lock(&sess->connlistlock); | |
213 | for (cur = sess->connlist; cur; cur = cur->next) { | |
214 | if (cur->fd > j) | |
215 | j = cur->fd; | |
216 | } | |
217 | faim_mutex_unlock(&sess->connlistlock); | |
218 | ||
219 | return j; | |
220 | } | |
221 | ||
222 | int aim_countconn(struct aim_session_t *sess) | |
223 | { | |
224 | int cnt = 0; | |
225 | struct aim_conn_t *cur; | |
226 | ||
227 | faim_mutex_lock(&sess->connlistlock); | |
228 | for (cur = sess->connlist; cur; cur = cur->next) | |
229 | cnt++; | |
230 | faim_mutex_unlock(&sess->connlistlock); | |
231 | ||
232 | return cnt; | |
233 | } | |
234 | ||
235 | /* | |
236 | * aim_select(timeout) | |
237 | * | |
238 | * Waits for a socket with data or for timeout, whichever comes first. | |
239 | * See select(2). | |
240 | * | |
241 | * Return codes in *status: | |
242 | * -1 error in select() (NULL returned) | |
243 | * 0 no events pending (NULL returned) | |
244 | * 1 outgoing data pending (NULL returned) | |
245 | * 2 incoming data pending (connection with pending data returned) | |
246 | * | |
247 | * XXX: we could probably stand to do a little courser locking here. | |
248 | * | |
249 | */ | |
250 | struct aim_conn_t *aim_select(struct aim_session_t *sess, | |
251 | struct timeval *timeout, int *status) | |
252 | { | |
253 | struct aim_conn_t *cur; | |
254 | fd_set fds; | |
255 | int maxfd = 0; | |
256 | int i; | |
257 | ||
258 | faim_mutex_lock(&sess->connlistlock); | |
259 | if (sess->connlist == NULL) { | |
260 | faim_mutex_unlock(&sess->connlistlock); | |
261 | *status = -1; | |
262 | return NULL; | |
263 | } | |
264 | faim_mutex_unlock(&sess->connlistlock); | |
265 | ||
266 | /* | |
267 | * If we have data waiting to be sent, return immediatly | |
268 | */ | |
269 | if (sess->queue_outgoing != NULL) { | |
270 | *status = 1; | |
271 | return NULL; | |
272 | } | |
273 | ||
274 | FD_ZERO(&fds); | |
275 | maxfd = 0; | |
276 | ||
277 | faim_mutex_lock(&sess->connlistlock); | |
278 | for (cur = sess->connlist; cur; cur = cur->next) { | |
279 | FD_SET(cur->fd, &fds); | |
280 | if (cur->fd > maxfd) | |
281 | maxfd = cur->fd; | |
282 | } | |
283 | faim_mutex_unlock(&sess->connlistlock); | |
284 | ||
285 | if ((i = select(maxfd+1, &fds, NULL, NULL, timeout))>=1) { | |
286 | faim_mutex_lock(&sess->connlistlock); | |
287 | for (cur = sess->connlist; cur; cur = cur->next) { | |
288 | if (FD_ISSET(cur->fd, &fds)) { | |
289 | *status = 2; | |
290 | faim_mutex_unlock(&sess->connlistlock); | |
291 | return cur; | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
296 | faim_mutex_unlock(&sess->connlistlock); | |
297 | *status = i; /* may be 0 or -1 */ | |
298 | return NULL; /* no waiting or error, return */ | |
299 | } | |
300 | ||
301 | int aim_conn_isready(struct aim_conn_t *conn) | |
302 | { | |
303 | if (conn) | |
304 | return (conn->status & 0x0001); | |
305 | return -1; | |
306 | } | |
307 | ||
308 | int aim_conn_setstatus(struct aim_conn_t *conn, int status) | |
309 | { | |
310 | int val; | |
311 | ||
312 | if (!conn) | |
313 | return -1; | |
314 | ||
315 | faim_mutex_lock(&conn->active); | |
316 | val = conn->status ^= status; | |
317 | faim_mutex_unlock(&conn->active); | |
318 | return val; | |
319 | } | |
320 | ||
321 | int aim_conn_setlatency(struct aim_conn_t *conn, int newval) | |
322 | { | |
323 | if (!conn) | |
324 | return -1; | |
325 | ||
326 | faim_mutex_lock(&conn->active); | |
327 | conn->forcedlatency = newval; | |
328 | conn->lastactivity = 0; /* reset this just to make sure */ | |
329 | faim_mutex_unlock(&conn->active); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | void aim_session_init(struct aim_session_t *sess) | |
335 | { | |
336 | if (!sess) | |
337 | return; | |
338 | ||
339 | memset(sess, 0, sizeof(struct aim_session_t)); | |
340 | aim_connrst(sess); | |
341 | sess->queue_outgoing = NULL; | |
342 | sess->queue_incoming = NULL; | |
343 | sess->pendingjoin = NULL; | |
344 | sess->outstanding_snacs = NULL; | |
345 | sess->snac_nextid = 0x00000001; | |
346 | ||
347 | /* | |
348 | * This must always be set. Default to the queue-based | |
349 | * version for back-compatibility. | |
350 | */ | |
351 | sess->tx_enqueue = &aim_tx_enqueue__queuebased; | |
352 | ||
353 | return; | |
354 | } |