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Commit | Line | Data |
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9de3ca7e | 1 | /* |
f1a5efe0 | 2 | * aim_rxqueue.c |
3 | * | |
4 | * This file contains the management routines for the receive | |
5 | * (incoming packet) queue. The actual packet handlers are in | |
6 | * aim_rxhandlers.c. | |
9de3ca7e | 7 | */ |
8 | ||
a25832e6 | 9 | #include <faim/aim.h> |
9de3ca7e | 10 | |
11 | /* | |
f1a5efe0 | 12 | * Grab a single command sequence off the socket, and enqueue |
13 | * it in the incoming event queue in a seperate struct. | |
a25832e6 | 14 | */ |
f1a5efe0 | 15 | int aim_get_command(struct aim_session_t *sess, struct aim_conn_t *conn) |
9de3ca7e | 16 | { |
b69540e3 | 17 | unsigned char generic[6]; |
f1a5efe0 | 18 | struct command_rx_struct *newrx = NULL; |
9de3ca7e | 19 | |
f1a5efe0 | 20 | if (!sess || !conn) |
21 | return 0; | |
9de3ca7e | 22 | |
f1a5efe0 | 23 | if (conn->fd < 3) /* can happen when people abuse the interface */ |
9de3ca7e | 24 | return 0; |
25 | ||
040457cc | 26 | /* |
27 | * Rendezvous (client-client) connections do not speak | |
28 | * FLAP, so this function will break on them. | |
29 | */ | |
b69540e3 | 30 | if (conn->type == AIM_CONN_TYPE_RENDEZVOUS) |
31 | return aim_get_command_rendezvous(sess, conn); | |
040457cc | 32 | |
f1a5efe0 | 33 | /* |
34 | * Read FLAP header. Six bytes: | |
35 | * | |
36 | * 0 char -- Always 0x2a | |
37 | * 1 char -- Channel ID. Usually 2 -- 1 and 4 are used during login. | |
38 | * 2 short -- Sequence number | |
39 | * 4 short -- Number of data bytes that follow. | |
40 | */ | |
e88ba395 | 41 | faim_mutex_lock(&conn->active); |
f1a5efe0 | 42 | if (read(conn->fd, generic, 6) < 6){ |
43 | aim_conn_close(conn); | |
e88ba395 | 44 | faim_mutex_unlock(&conn->active); |
f1a5efe0 | 45 | return -1; |
46 | } | |
9de3ca7e | 47 | |
b8d0da45 | 48 | /* |
49 | * This shouldn't happen unless the socket breaks, the server breaks, | |
50 | * or we break. We must handle it just in case. | |
51 | */ | |
52 | if (generic[0] != 0x2a) { | |
f1a5efe0 | 53 | faimdprintf(1, "Bad incoming data!"); |
b69540e3 | 54 | faim_mutex_unlock(&conn->active); |
b8d0da45 | 55 | return -1; |
56 | } | |
9de3ca7e | 57 | |
9de3ca7e | 58 | /* allocate a new struct */ |
b69540e3 | 59 | if (!(newrx = (struct command_rx_struct *)malloc(sizeof(struct command_rx_struct)))) { |
60 | faim_mutex_unlock(&conn->active); | |
f1a5efe0 | 61 | return -1; |
b69540e3 | 62 | } |
f1a5efe0 | 63 | memset(newrx, 0x00, sizeof(struct command_rx_struct)); |
b8d0da45 | 64 | |
f1a5efe0 | 65 | newrx->lock = 1; /* lock the struct */ |
9de3ca7e | 66 | |
b69540e3 | 67 | /* we're doing OSCAR if we're here */ |
68 | newrx->hdrtype = AIM_FRAMETYPE_OSCAR; | |
69 | ||
a25832e6 | 70 | /* store channel -- byte 2 */ |
b69540e3 | 71 | newrx->hdr.oscar.type = (char) generic[1]; |
9de3ca7e | 72 | |
73 | /* store seqnum -- bytes 3 and 4 */ | |
b69540e3 | 74 | newrx->hdr.oscar.seqnum = aimutil_get16(generic+2); |
9de3ca7e | 75 | |
76 | /* store commandlen -- bytes 5 and 6 */ | |
f1a5efe0 | 77 | newrx->commandlen = aimutil_get16(generic+4); |
9de3ca7e | 78 | |
f1a5efe0 | 79 | newrx->nofree = 0; /* free by default */ |
b8d0da45 | 80 | |
9de3ca7e | 81 | /* malloc for data portion */ |
b69540e3 | 82 | if (!(newrx->data = (u_char *) malloc(newrx->commandlen))) { |
f1a5efe0 | 83 | free(newrx); |
b69540e3 | 84 | faim_mutex_unlock(&conn->active); |
f1a5efe0 | 85 | return -1; |
86 | } | |
9de3ca7e | 87 | |
88 | /* read the data portion of the packet */ | |
f1a5efe0 | 89 | if (read(conn->fd, newrx->data, newrx->commandlen) < newrx->commandlen){ |
90 | free(newrx->data); | |
91 | free(newrx); | |
b8d0da45 | 92 | aim_conn_close(conn); |
e88ba395 | 93 | faim_mutex_unlock(&conn->active); |
b8d0da45 | 94 | return -1; |
95 | } | |
e88ba395 | 96 | faim_mutex_unlock(&conn->active); |
9de3ca7e | 97 | |
f1a5efe0 | 98 | newrx->conn = conn; |
9de3ca7e | 99 | |
f1a5efe0 | 100 | newrx->next = NULL; /* this will always be at the bottom */ |
101 | newrx->lock = 0; /* unlock */ | |
9de3ca7e | 102 | |
103 | /* enqueue this packet */ | |
b8d0da45 | 104 | if (sess->queue_incoming == NULL) { |
f1a5efe0 | 105 | sess->queue_incoming = newrx; |
b8d0da45 | 106 | } else { |
107 | struct command_rx_struct *cur; | |
108 | ||
109 | /* | |
110 | * This append operation takes a while. It might be faster | |
111 | * if we maintain a pointer to the last entry in the queue | |
112 | * and just update that. Need to determine if the overhead | |
113 | * to maintain that is lower than the overhead for this loop. | |
114 | */ | |
115 | for (cur = sess->queue_incoming; cur->next; cur = cur->next) | |
116 | ; | |
f1a5efe0 | 117 | cur->next = newrx; |
b8d0da45 | 118 | } |
9de3ca7e | 119 | |
f1a5efe0 | 120 | newrx->conn->lastactivity = time(NULL); |
9de3ca7e | 121 | |
122 | return 0; | |
123 | } | |
124 | ||
b69540e3 | 125 | int aim_get_command_rendezvous(struct aim_session_t *sess, struct aim_conn_t *conn) |
126 | { | |
127 | unsigned char hdrbuf1[6]; | |
128 | unsigned char *hdr = NULL; | |
129 | int hdrlen, hdrtype; | |
130 | int payloadlength = 0; | |
131 | int flags = 0; | |
132 | char *snptr = NULL; | |
133 | ||
134 | if (read(conn->fd, hdrbuf1, 6) < 6) { | |
135 | perror("read"); | |
136 | printf("faim: rend: read error\n"); | |
137 | aim_conn_kill(sess, &conn); | |
138 | return -1; | |
139 | } | |
140 | ||
141 | hdrlen = aimutil_get16(hdrbuf1+4); | |
142 | ||
143 | hdrlen -= 6; | |
144 | hdr = malloc(hdrlen); | |
145 | ||
146 | faim_mutex_lock(&conn->active); | |
147 | if (read(conn->fd, hdr, hdrlen) < hdrlen) { | |
148 | perror("read"); | |
149 | printf("faim: rend: read2 error\n"); | |
150 | free(hdr); | |
151 | faim_mutex_unlock(&conn->active); | |
152 | aim_conn_kill(sess, &conn); | |
153 | return -1; | |
154 | } | |
155 | ||
156 | hdrtype = aimutil_get16(hdr); | |
157 | ||
158 | switch (hdrtype) { | |
159 | case 0x0001: { | |
160 | payloadlength = aimutil_get32(hdr+22); | |
161 | flags = aimutil_get16(hdr+32); | |
162 | snptr = hdr+38; | |
163 | ||
164 | printf("OFT frame: %04x / %04x / %04x / %s\n", hdrtype, payloadlength, flags, snptr); | |
165 | ||
166 | if (flags == 0x000e) { | |
167 | printf("directim: %s has started typing\n", snptr); | |
168 | } else if ((flags == 0x0000) && payloadlength) { | |
169 | unsigned char *buf; | |
170 | buf = malloc(payloadlength+1); | |
171 | ||
172 | /* XXX theres got to be a better way */ | |
173 | faim_mutex_lock(&conn->active); | |
174 | if (recv(conn->fd, buf, payloadlength, MSG_WAITALL) < payloadlength) { | |
175 | perror("read"); | |
176 | printf("faim: rend: read3 error\n"); | |
177 | free(buf); | |
178 | faim_mutex_unlock(&conn->active); | |
179 | aim_conn_kill(sess, &conn); | |
180 | return -1; | |
181 | } | |
182 | faim_mutex_unlock(&conn->active); | |
183 | buf[payloadlength] = '\0'; | |
184 | printf("directim: %s/%04x/%04x/%s\n", snptr, payloadlength, flags, buf); | |
185 | aim_send_im_direct(sess, conn, buf); | |
186 | free(buf); | |
187 | } | |
188 | break; | |
189 | } | |
190 | default: | |
191 | printf("OFT frame: type %04x\n", hdrtype); | |
192 | /* data connection may be unreliable here */ | |
193 | break; | |
194 | } /* switch */ | |
195 | ||
196 | free(hdr); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
9de3ca7e | 201 | /* |
b8d0da45 | 202 | * Purge recieve queue of all handled commands (->handled==1). Also |
203 | * allows for selective freeing using ->nofree so that the client can | |
204 | * keep the data for various purposes. | |
a25832e6 | 205 | * |
b8d0da45 | 206 | * If ->nofree is nonzero, the frame will be delinked from the global list, |
207 | * but will not be free'ed. The client _must_ keep a pointer to the | |
208 | * data -- libfaim will not! If the client marks ->nofree but | |
209 | * does not keep a pointer, it's lost forever. | |
a25832e6 | 210 | * |
9de3ca7e | 211 | */ |
b8d0da45 | 212 | void aim_purge_rxqueue(struct aim_session_t *sess) |
9de3ca7e | 213 | { |
b8d0da45 | 214 | struct command_rx_struct *cur = NULL; |
215 | struct command_rx_struct *tmp; | |
9de3ca7e | 216 | |
b8d0da45 | 217 | if (sess->queue_incoming == NULL) |
218 | return; | |
219 | ||
220 | if (sess->queue_incoming->next == NULL) { | |
221 | if (sess->queue_incoming->handled) { | |
222 | tmp = sess->queue_incoming; | |
223 | sess->queue_incoming = NULL; | |
224 | ||
225 | if (!tmp->nofree) { | |
b69540e3 | 226 | if (tmp->hdrtype == AIM_FRAMETYPE_OFT) |
227 | free(tmp->hdr.oft.hdr2); | |
b8d0da45 | 228 | free(tmp->data); |
229 | free(tmp); | |
230 | } else | |
231 | tmp->next = NULL; | |
9de3ca7e | 232 | } |
b8d0da45 | 233 | return; |
234 | } | |
235 | ||
236 | for(cur = sess->queue_incoming; cur->next != NULL; ) { | |
237 | if (cur->next->handled) { | |
238 | tmp = cur->next; | |
239 | cur->next = tmp->next; | |
240 | if (!tmp->nofree) { | |
b69540e3 | 241 | if (tmp->hdrtype == AIM_FRAMETYPE_OFT) |
242 | free(tmp->hdr.oft.hdr2); | |
b8d0da45 | 243 | free(tmp->data); |
244 | free(tmp); | |
245 | } else | |
246 | tmp->next = NULL; | |
247 | } | |
248 | cur = cur->next; | |
249 | ||
250 | /* | |
251 | * Be careful here. Because of the way we just | |
252 | * manipulated the pointer, cur may be NULL and | |
253 | * the for() will segfault doing the check unless | |
254 | * we find this case first. | |
255 | */ | |
256 | if (cur == NULL) | |
257 | break; | |
258 | } | |
259 | ||
260 | return; | |
9de3ca7e | 261 | } |