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Commit | Line | Data |
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f0cbd3ec FB |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1988, 1990, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
2f5f8996 | 13 | * 3. Neither the name of the University nor the names of its contributors |
f0cbd3ec FB |
14 | * may be used to endorse or promote products derived from this software |
15 | * without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
28 | * | |
29 | * @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94 | |
30 | * udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp | |
31 | */ | |
32 | ||
33 | /* | |
34 | * Changes and additions relating to SLiRP | |
35 | * Copyright (c) 1995 Danny Gasparovski. | |
5fafdf24 TS |
36 | * |
37 | * Please read the file COPYRIGHT for the | |
f0cbd3ec FB |
38 | * terms and conditions of the copyright. |
39 | */ | |
40 | ||
41 | #include <slirp.h> | |
42 | #include "ip_icmp.h" | |
43 | ||
9634d903 BS |
44 | static u_int8_t udp_tos(struct socket *so); |
45 | static void udp_emu(struct socket *so, struct mbuf *m); | |
46 | ||
f0cbd3ec | 47 | void |
460fec67 | 48 | udp_init(Slirp *slirp) |
f0cbd3ec | 49 | { |
460fec67 JK |
50 | slirp->udb.so_next = slirp->udb.so_prev = &slirp->udb; |
51 | slirp->udp_last_so = &slirp->udb; | |
f0cbd3ec | 52 | } |
5fafdf24 TS |
53 | /* m->m_data points at ip packet header |
54 | * m->m_len length ip packet | |
f0cbd3ec FB |
55 | * ip->ip_len length data (IPDU) |
56 | */ | |
57 | void | |
aeed97c4 | 58 | udp_input(register struct mbuf *m, int iphlen) |
f0cbd3ec | 59 | { |
460fec67 | 60 | Slirp *slirp = m->slirp; |
f0cbd3ec FB |
61 | register struct ip *ip; |
62 | register struct udphdr *uh; | |
f0cbd3ec | 63 | int len; |
5fafdf24 | 64 | struct ip save_ip; |
f0cbd3ec | 65 | struct socket *so; |
5fafdf24 | 66 | |
f0cbd3ec FB |
67 | DEBUG_CALL("udp_input"); |
68 | DEBUG_ARG("m = %lx", (long)m); | |
69 | DEBUG_ARG("iphlen = %d", iphlen); | |
5fafdf24 | 70 | |
f0cbd3ec FB |
71 | /* |
72 | * Strip IP options, if any; should skip this, | |
73 | * make available to user, and use on returned packets, | |
74 | * but we don't yet have a way to check the checksum | |
75 | * with options still present. | |
76 | */ | |
77 | if(iphlen > sizeof(struct ip)) { | |
78 | ip_stripoptions(m, (struct mbuf *)0); | |
79 | iphlen = sizeof(struct ip); | |
80 | } | |
81 | ||
82 | /* | |
83 | * Get IP and UDP header together in first mbuf. | |
84 | */ | |
85 | ip = mtod(m, struct ip *); | |
86 | uh = (struct udphdr *)((caddr_t)ip + iphlen); | |
87 | ||
88 | /* | |
89 | * Make mbuf data length reflect UDP length. | |
90 | * If not enough data to reflect UDP length, drop. | |
91 | */ | |
92 | len = ntohs((u_int16_t)uh->uh_ulen); | |
93 | ||
94 | if (ip->ip_len != len) { | |
95 | if (len > ip->ip_len) { | |
f0cbd3ec FB |
96 | goto bad; |
97 | } | |
98 | m_adj(m, len - ip->ip_len); | |
99 | ip->ip_len = len; | |
100 | } | |
5fafdf24 | 101 | |
f0cbd3ec FB |
102 | /* |
103 | * Save a copy of the IP header in case we want restore it | |
104 | * for sending an ICMP error message in response. | |
105 | */ | |
5fafdf24 | 106 | save_ip = *ip; |
f0cbd3ec FB |
107 | save_ip.ip_len+= iphlen; /* tcp_input subtracts this */ |
108 | ||
109 | /* | |
110 | * Checksum extended UDP header and data. | |
111 | */ | |
0d62c4cf | 112 | if (uh->uh_sum) { |
429d0a3d | 113 | memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr)); |
f0cbd3ec FB |
114 | ((struct ipovly *)ip)->ih_x1 = 0; |
115 | ((struct ipovly *)ip)->ih_len = uh->uh_ulen; | |
f0cbd3ec | 116 | if(cksum(m, len + sizeof(struct ip))) { |
f0cbd3ec FB |
117 | goto bad; |
118 | } | |
119 | } | |
120 | ||
121 | /* | |
122 | * handle DHCP/BOOTP | |
123 | */ | |
124 | if (ntohs(uh->uh_dport) == BOOTP_SERVER) { | |
125 | bootp_input(m); | |
126 | goto bad; | |
127 | } | |
128 | ||
460fec67 | 129 | if (slirp->restricted) { |
a9ba3a85 | 130 | goto bad; |
460fec67 | 131 | } |
a9ba3a85 | 132 | |
c7f74643 FB |
133 | /* |
134 | * handle TFTP | |
135 | */ | |
136 | if (ntohs(uh->uh_dport) == TFTP_SERVER) { | |
137 | tftp_input(m); | |
138 | goto bad; | |
139 | } | |
140 | ||
f0cbd3ec FB |
141 | /* |
142 | * Locate pcb for datagram. | |
143 | */ | |
460fec67 | 144 | so = slirp->udp_last_so; |
f0cbd3ec FB |
145 | if (so->so_lport != uh->uh_sport || |
146 | so->so_laddr.s_addr != ip->ip_src.s_addr) { | |
147 | struct socket *tmp; | |
3b46e624 | 148 | |
460fec67 JK |
149 | for (tmp = slirp->udb.so_next; tmp != &slirp->udb; |
150 | tmp = tmp->so_next) { | |
f0cbd3ec FB |
151 | if (tmp->so_lport == uh->uh_sport && |
152 | tmp->so_laddr.s_addr == ip->ip_src.s_addr) { | |
f0cbd3ec FB |
153 | so = tmp; |
154 | break; | |
155 | } | |
156 | } | |
460fec67 | 157 | if (tmp == &slirp->udb) { |
f0cbd3ec FB |
158 | so = NULL; |
159 | } else { | |
460fec67 | 160 | slirp->udp_last_so = so; |
f0cbd3ec FB |
161 | } |
162 | } | |
5fafdf24 | 163 | |
f0cbd3ec FB |
164 | if (so == NULL) { |
165 | /* | |
166 | * If there's no socket for this packet, | |
167 | * create one | |
168 | */ | |
460fec67 JK |
169 | so = socreate(slirp); |
170 | if (!so) { | |
171 | goto bad; | |
172 | } | |
f0cbd3ec | 173 | if(udp_attach(so) == -1) { |
5fafdf24 | 174 | DEBUG_MISC((dfd," udp_attach errno = %d-%s\n", |
f0cbd3ec FB |
175 | errno,strerror(errno))); |
176 | sofree(so); | |
177 | goto bad; | |
178 | } | |
3b46e624 | 179 | |
f0cbd3ec FB |
180 | /* |
181 | * Setup fields | |
182 | */ | |
f0cbd3ec FB |
183 | so->so_laddr = ip->ip_src; |
184 | so->so_lport = uh->uh_sport; | |
3b46e624 | 185 | |
f0cbd3ec FB |
186 | if ((so->so_iptos = udp_tos(so)) == 0) |
187 | so->so_iptos = ip->ip_tos; | |
3b46e624 | 188 | |
f0cbd3ec FB |
189 | /* |
190 | * XXXXX Here, check if it's in udpexec_list, | |
191 | * and if it is, do the fork_exec() etc. | |
192 | */ | |
193 | } | |
194 | ||
54fd9cdf TS |
195 | so->so_faddr = ip->ip_dst; /* XXX */ |
196 | so->so_fport = uh->uh_dport; /* XXX */ | |
197 | ||
f0cbd3ec FB |
198 | iphlen += sizeof(struct udphdr); |
199 | m->m_len -= iphlen; | |
200 | m->m_data += iphlen; | |
201 | ||
202 | /* | |
203 | * Now we sendto() the packet. | |
204 | */ | |
205 | if (so->so_emu) | |
206 | udp_emu(so, m); | |
207 | ||
208 | if(sosendto(so,m) == -1) { | |
209 | m->m_len += iphlen; | |
210 | m->m_data -= iphlen; | |
211 | *ip=save_ip; | |
212 | DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno))); | |
3b46e624 | 213 | icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno)); |
f0cbd3ec FB |
214 | } |
215 | ||
216 | m_free(so->so_m); /* used for ICMP if error on sorecvfrom */ | |
217 | ||
218 | /* restore the orig mbuf packet */ | |
219 | m->m_len += iphlen; | |
220 | m->m_data -= iphlen; | |
221 | *ip=save_ip; | |
222 | so->so_m=m; /* ICMP backup */ | |
223 | ||
224 | return; | |
225 | bad: | |
226 | m_freem(m); | |
f0cbd3ec FB |
227 | return; |
228 | } | |
229 | ||
5fafdf24 | 230 | int udp_output2(struct socket *so, struct mbuf *m, |
f0cbd3ec FB |
231 | struct sockaddr_in *saddr, struct sockaddr_in *daddr, |
232 | int iptos) | |
233 | { | |
234 | register struct udpiphdr *ui; | |
235 | int error = 0; | |
236 | ||
237 | DEBUG_CALL("udp_output"); | |
238 | DEBUG_ARG("so = %lx", (long)so); | |
239 | DEBUG_ARG("m = %lx", (long)m); | |
240 | DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr); | |
241 | DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr); | |
242 | ||
243 | /* | |
244 | * Adjust for header | |
245 | */ | |
246 | m->m_data -= sizeof(struct udpiphdr); | |
247 | m->m_len += sizeof(struct udpiphdr); | |
5fafdf24 | 248 | |
f0cbd3ec FB |
249 | /* |
250 | * Fill in mbuf with extended UDP header | |
251 | * and addresses and length put into network format. | |
252 | */ | |
253 | ui = mtod(m, struct udpiphdr *); | |
429d0a3d | 254 | memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr)); |
f0cbd3ec FB |
255 | ui->ui_x1 = 0; |
256 | ui->ui_pr = IPPROTO_UDP; | |
0d62c4cf | 257 | ui->ui_len = htons(m->m_len - sizeof(struct ip)); |
f0cbd3ec FB |
258 | /* XXXXX Check for from-one-location sockets, or from-any-location sockets */ |
259 | ui->ui_src = saddr->sin_addr; | |
260 | ui->ui_dst = daddr->sin_addr; | |
261 | ui->ui_sport = saddr->sin_port; | |
262 | ui->ui_dport = daddr->sin_port; | |
263 | ui->ui_ulen = ui->ui_len; | |
264 | ||
265 | /* | |
266 | * Stuff checksum and output datagram. | |
267 | */ | |
268 | ui->ui_sum = 0; | |
0d62c4cf | 269 | if ((ui->ui_sum = cksum(m, m->m_len)) == 0) |
f0cbd3ec | 270 | ui->ui_sum = 0xffff; |
f0cbd3ec FB |
271 | ((struct ip *)ui)->ip_len = m->m_len; |
272 | ||
9634d903 | 273 | ((struct ip *)ui)->ip_ttl = IPDEFTTL; |
f0cbd3ec | 274 | ((struct ip *)ui)->ip_tos = iptos; |
5fafdf24 | 275 | |
f0cbd3ec | 276 | error = ip_output(so, m); |
5fafdf24 | 277 | |
f0cbd3ec FB |
278 | return (error); |
279 | } | |
280 | ||
5fafdf24 | 281 | int udp_output(struct socket *so, struct mbuf *m, |
f0cbd3ec FB |
282 | struct sockaddr_in *addr) |
283 | ||
284 | { | |
460fec67 | 285 | Slirp *slirp = so->slirp; |
f0cbd3ec FB |
286 | struct sockaddr_in saddr, daddr; |
287 | ||
288 | saddr = *addr; | |
460fec67 JK |
289 | if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == |
290 | slirp->vnetwork_addr.s_addr) { | |
291 | uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr; | |
292 | ||
293 | if ((so->so_faddr.s_addr & inv_mask) == inv_mask) { | |
294 | saddr.sin_addr = slirp->vhost_addr; | |
a13a4126 | 295 | } else if (addr->sin_addr.s_addr == loopback_addr.s_addr || |
460fec67 | 296 | so->so_faddr.s_addr != slirp->vhost_addr.s_addr) { |
a13a4126 JK |
297 | saddr.sin_addr = so->so_faddr; |
298 | } | |
c904d61f | 299 | } |
f0cbd3ec FB |
300 | daddr.sin_addr = so->so_laddr; |
301 | daddr.sin_port = so->so_lport; | |
3b46e624 | 302 | |
f0cbd3ec FB |
303 | return udp_output2(so, m, &saddr, &daddr, so->so_iptos); |
304 | } | |
305 | ||
306 | int | |
aeed97c4 | 307 | udp_attach(struct socket *so) |
f0cbd3ec FB |
308 | { |
309 | struct sockaddr_in addr; | |
5fafdf24 | 310 | |
f0cbd3ec FB |
311 | if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) { |
312 | /* | |
313 | * Here, we bind() the socket. Although not really needed | |
314 | * (sendto() on an unbound socket will bind it), it's done | |
315 | * here so that emulation of ytalk etc. don't have to do it | |
316 | */ | |
317 | addr.sin_family = AF_INET; | |
318 | addr.sin_port = 0; | |
319 | addr.sin_addr.s_addr = INADDR_ANY; | |
320 | if(bind(so->s, (struct sockaddr *)&addr, sizeof(addr))<0) { | |
321 | int lasterrno=errno; | |
379ff53d | 322 | closesocket(so->s); |
f0cbd3ec | 323 | so->s=-1; |
02d2c54c FB |
324 | #ifdef _WIN32 |
325 | WSASetLastError(lasterrno); | |
326 | #else | |
f0cbd3ec | 327 | errno=lasterrno; |
02d2c54c | 328 | #endif |
f0cbd3ec FB |
329 | } else { |
330 | /* success, insert in queue */ | |
331 | so->so_expire = curtime + SO_EXPIRE; | |
460fec67 | 332 | insque(so, &so->slirp->udb); |
f0cbd3ec FB |
333 | } |
334 | } | |
335 | return(so->s); | |
336 | } | |
337 | ||
338 | void | |
aeed97c4 | 339 | udp_detach(struct socket *so) |
f0cbd3ec | 340 | { |
379ff53d | 341 | closesocket(so->s); |
f0cbd3ec FB |
342 | sofree(so); |
343 | } | |
344 | ||
9634d903 | 345 | static const struct tos_t udptos[] = { |
f0cbd3ec FB |
346 | {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */ |
347 | {517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */ | |
348 | {518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */ | |
349 | {0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */ | |
350 | {0, 0, 0, 0} | |
351 | }; | |
352 | ||
9634d903 BS |
353 | static u_int8_t |
354 | udp_tos(struct socket *so) | |
f0cbd3ec FB |
355 | { |
356 | int i = 0; | |
5fafdf24 | 357 | |
f0cbd3ec FB |
358 | while(udptos[i].tos) { |
359 | if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) || | |
360 | (udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) { | |
361 | so->so_emu = udptos[i].emu; | |
362 | return udptos[i].tos; | |
363 | } | |
364 | i++; | |
365 | } | |
5fafdf24 | 366 | |
f0cbd3ec FB |
367 | return 0; |
368 | } | |
369 | ||
370 | #ifdef EMULATE_TALK | |
371 | #include "talkd.h" | |
372 | #endif | |
373 | ||
374 | /* | |
375 | * Here, talk/ytalk/ntalk requests must be emulated | |
376 | */ | |
9634d903 BS |
377 | static void |
378 | udp_emu(struct socket *so, struct mbuf *m) | |
f0cbd3ec FB |
379 | { |
380 | struct sockaddr_in addr; | |
242acf3a | 381 | socklen_t addrlen = sizeof(addr); |
f0cbd3ec FB |
382 | #ifdef EMULATE_TALK |
383 | CTL_MSG_OLD *omsg; | |
384 | CTL_MSG *nmsg; | |
385 | char buff[sizeof(CTL_MSG)]; | |
386 | u_char type; | |
5fafdf24 | 387 | |
f0cbd3ec FB |
388 | struct talk_request { |
389 | struct talk_request *next; | |
390 | struct socket *udp_so; | |
391 | struct socket *tcp_so; | |
392 | } *req; | |
5fafdf24 TS |
393 | |
394 | static struct talk_request *req_tbl = 0; | |
395 | ||
f0cbd3ec | 396 | #endif |
5fafdf24 | 397 | |
f0cbd3ec | 398 | struct cu_header { |
101c5935 FB |
399 | uint16_t d_family; // destination family |
400 | uint16_t d_port; // destination port | |
401 | uint32_t d_addr; // destination address | |
402 | uint16_t s_family; // source family | |
403 | uint16_t s_port; // source port | |
51a36cb2 | 404 | uint32_t so_addr; // source address |
101c5935 FB |
405 | uint32_t seqn; // sequence number |
406 | uint16_t message; // message | |
407 | uint16_t data_type; // data type | |
408 | uint16_t pkt_len; // packet length | |
f0cbd3ec FB |
409 | } *cu_head; |
410 | ||
411 | switch(so->so_emu) { | |
412 | ||
413 | #ifdef EMULATE_TALK | |
414 | case EMU_TALK: | |
415 | case EMU_NTALK: | |
416 | /* | |
417 | * Talk emulation. We always change the ctl_addr to get | |
418 | * some answers from the daemon. When an ANNOUNCE comes, | |
419 | * we send LEAVE_INVITE to the local daemons. Also when a | |
420 | * DELETE comes, we send copies to the local daemons. | |
421 | */ | |
422 | if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) | |
423 | return; | |
3b46e624 | 424 | |
f0cbd3ec FB |
425 | #define IS_OLD (so->so_emu == EMU_TALK) |
426 | ||
427 | #define COPY_MSG(dest, src) { dest->type = src->type; \ | |
428 | dest->id_num = src->id_num; \ | |
429 | dest->pid = src->pid; \ | |
430 | dest->addr = src->addr; \ | |
431 | dest->ctl_addr = src->ctl_addr; \ | |
432 | memcpy(&dest->l_name, &src->l_name, NAME_SIZE_OLD); \ | |
433 | memcpy(&dest->r_name, &src->r_name, NAME_SIZE_OLD); \ | |
434 | memcpy(&dest->r_tty, &src->r_tty, TTY_SIZE); } | |
435 | ||
436 | #define OTOSIN(ptr, field) ((struct sockaddr_in *)&ptr->field) | |
437 | /* old_sockaddr to sockaddr_in */ | |
438 | ||
439 | ||
440 | if (IS_OLD) { /* old talk */ | |
441 | omsg = mtod(m, CTL_MSG_OLD*); | |
442 | nmsg = (CTL_MSG *) buff; | |
443 | type = omsg->type; | |
444 | OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port; | |
445 | OTOSIN(omsg, ctl_addr)->sin_addr = our_addr; | |
be15b141 | 446 | pstrcpy(omsg->l_name, NAME_SIZE_OLD, getlogin()); |
5fafdf24 | 447 | } else { /* new talk */ |
f0cbd3ec FB |
448 | omsg = (CTL_MSG_OLD *) buff; |
449 | nmsg = mtod(m, CTL_MSG *); | |
450 | type = nmsg->type; | |
451 | OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port; | |
452 | OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr; | |
be15b141 | 453 | pstrcpy(nmsg->l_name, NAME_SIZE_OLD, getlogin()); |
f0cbd3ec | 454 | } |
3b46e624 | 455 | |
5fafdf24 | 456 | if (type == LOOK_UP) |
f0cbd3ec | 457 | return; /* for LOOK_UP this is enough */ |
3b46e624 | 458 | |
f0cbd3ec FB |
459 | if (IS_OLD) { /* make a copy of the message */ |
460 | COPY_MSG(nmsg, omsg); | |
461 | nmsg->vers = 1; | |
462 | nmsg->answer = 0; | |
463 | } else | |
464 | COPY_MSG(omsg, nmsg); | |
465 | ||
466 | /* | |
467 | * If if is an ANNOUNCE message, we go through the | |
468 | * request table to see if a tcp port has already | |
469 | * been redirected for this socket. If not, we solisten() | |
470 | * a new socket and add this entry to the table. | |
471 | * The port number of the tcp socket and our IP | |
472 | * are put to the addr field of the message structures. | |
473 | * Then a LEAVE_INVITE is sent to both local daemon | |
474 | * ports, 517 and 518. This is why we have two copies | |
475 | * of the message, one in old talk and one in new talk | |
476 | * format. | |
5fafdf24 | 477 | */ |
f0cbd3ec FB |
478 | |
479 | if (type == ANNOUNCE) { | |
480 | int s; | |
481 | u_short temp_port; | |
3b46e624 | 482 | |
f0cbd3ec FB |
483 | for(req = req_tbl; req; req = req->next) |
484 | if (so == req->udp_so) | |
485 | break; /* found it */ | |
3b46e624 | 486 | |
f0cbd3ec FB |
487 | if (!req) { /* no entry for so, create new */ |
488 | req = (struct talk_request *) | |
489 | malloc(sizeof(struct talk_request)); | |
490 | req->udp_so = so; | |
3b46e624 | 491 | req->tcp_so = solisten(0, |
5fafdf24 | 492 | OTOSIN(omsg, addr)->sin_addr.s_addr, |
f0cbd3ec FB |
493 | OTOSIN(omsg, addr)->sin_port, |
494 | SS_FACCEPTONCE); | |
495 | req->next = req_tbl; | |
496 | req_tbl = req; | |
3b46e624 TS |
497 | } |
498 | ||
f0cbd3ec FB |
499 | /* replace port number in addr field */ |
500 | addrlen = sizeof(addr); | |
5fafdf24 | 501 | getsockname(req->tcp_so->s, |
f0cbd3ec | 502 | (struct sockaddr *) &addr, |
3b46e624 | 503 | &addrlen); |
f0cbd3ec FB |
504 | OTOSIN(omsg, addr)->sin_port = addr.sin_port; |
505 | OTOSIN(omsg, addr)->sin_addr = our_addr; | |
506 | OTOSIN(nmsg, addr)->sin_port = addr.sin_port; | |
3b46e624 TS |
507 | OTOSIN(nmsg, addr)->sin_addr = our_addr; |
508 | ||
f0cbd3ec FB |
509 | /* send LEAVE_INVITEs */ |
510 | temp_port = OTOSIN(omsg, ctl_addr)->sin_port; | |
511 | OTOSIN(omsg, ctl_addr)->sin_port = 0; | |
512 | OTOSIN(nmsg, ctl_addr)->sin_port = 0; | |
3b46e624 TS |
513 | omsg->type = nmsg->type = LEAVE_INVITE; |
514 | ||
f0cbd3ec FB |
515 | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
516 | addr.sin_addr = our_addr; | |
517 | addr.sin_family = AF_INET; | |
518 | addr.sin_port = htons(517); | |
5fafdf24 | 519 | sendto(s, (char *)omsg, sizeof(*omsg), 0, |
f0cbd3ec FB |
520 | (struct sockaddr *)&addr, sizeof(addr)); |
521 | addr.sin_port = htons(518); | |
522 | sendto(s, (char *)nmsg, sizeof(*nmsg), 0, | |
523 | (struct sockaddr *) &addr, sizeof(addr)); | |
379ff53d | 524 | closesocket(s) ; |
f0cbd3ec | 525 | |
5fafdf24 | 526 | omsg->type = nmsg->type = ANNOUNCE; |
f0cbd3ec FB |
527 | OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
528 | OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; | |
529 | } | |
3b46e624 | 530 | |
5fafdf24 | 531 | /* |
f0cbd3ec FB |
532 | * If it is a DELETE message, we send a copy to the |
533 | * local daemons. Then we delete the entry corresponding | |
534 | * to our socket from the request table. | |
535 | */ | |
3b46e624 | 536 | |
f0cbd3ec FB |
537 | if (type == DELETE) { |
538 | struct talk_request *temp_req, *req_next; | |
539 | int s; | |
540 | u_short temp_port; | |
3b46e624 | 541 | |
f0cbd3ec FB |
542 | temp_port = OTOSIN(omsg, ctl_addr)->sin_port; |
543 | OTOSIN(omsg, ctl_addr)->sin_port = 0; | |
544 | OTOSIN(nmsg, ctl_addr)->sin_port = 0; | |
3b46e624 | 545 | |
f0cbd3ec FB |
546 | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
547 | addr.sin_addr = our_addr; | |
548 | addr.sin_family = AF_INET; | |
549 | addr.sin_port = htons(517); | |
550 | sendto(s, (char *)omsg, sizeof(*omsg), 0, | |
551 | (struct sockaddr *)&addr, sizeof(addr)); | |
552 | addr.sin_port = htons(518); | |
553 | sendto(s, (char *)nmsg, sizeof(*nmsg), 0, | |
554 | (struct sockaddr *)&addr, sizeof(addr)); | |
379ff53d | 555 | closesocket(s); |
3b46e624 | 556 | |
f0cbd3ec FB |
557 | OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
558 | OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; | |
559 | ||
560 | /* delete table entry */ | |
561 | if (so == req_tbl->udp_so) { | |
562 | temp_req = req_tbl; | |
563 | req_tbl = req_tbl->next; | |
564 | free(temp_req); | |
565 | } else { | |
566 | temp_req = req_tbl; | |
567 | for(req = req_tbl->next; req; req = req_next) { | |
568 | req_next = req->next; | |
569 | if (so == req->udp_so) { | |
570 | temp_req->next = req_next; | |
571 | free(req); | |
572 | break; | |
573 | } else { | |
574 | temp_req = req; | |
575 | } | |
576 | } | |
577 | } | |
578 | } | |
3b46e624 TS |
579 | |
580 | return; | |
f0cbd3ec | 581 | #endif |
3b46e624 | 582 | |
5fafdf24 TS |
583 | case EMU_CUSEEME: |
584 | ||
f0cbd3ec FB |
585 | /* |
586 | * Cu-SeeMe emulation. | |
587 | * Hopefully the packet is more that 16 bytes long. We don't | |
588 | * do any other tests, just replace the address and port | |
589 | * fields. | |
5fafdf24 | 590 | */ |
f0cbd3ec FB |
591 | if (m->m_len >= sizeof (*cu_head)) { |
592 | if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) | |
593 | return; | |
594 | cu_head = mtod(m, struct cu_header *); | |
101c5935 | 595 | cu_head->s_port = addr.sin_port; |
51a36cb2 | 596 | cu_head->so_addr = our_addr.s_addr; |
f0cbd3ec | 597 | } |
3b46e624 | 598 | |
f0cbd3ec FB |
599 | return; |
600 | } | |
601 | } | |
602 | ||
603 | struct socket * | |
460fec67 JK |
604 | udp_listen(Slirp *slirp, u_int32_t haddr, u_int hport, u_int32_t laddr, |
605 | u_int lport, int flags) | |
f0cbd3ec FB |
606 | { |
607 | struct sockaddr_in addr; | |
608 | struct socket *so; | |
242acf3a | 609 | socklen_t addrlen = sizeof(struct sockaddr_in), opt = 1; |
5fafdf24 | 610 | |
460fec67 JK |
611 | so = socreate(slirp); |
612 | if (!so) { | |
613 | return NULL; | |
f0cbd3ec FB |
614 | } |
615 | so->s = socket(AF_INET,SOCK_DGRAM,0); | |
616 | so->so_expire = curtime + SO_EXPIRE; | |
460fec67 | 617 | insque(so, &slirp->udb); |
f0cbd3ec FB |
618 | |
619 | addr.sin_family = AF_INET; | |
3c6a0580 JK |
620 | addr.sin_addr.s_addr = haddr; |
621 | addr.sin_port = hport; | |
f0cbd3ec FB |
622 | |
623 | if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) { | |
624 | udp_detach(so); | |
625 | return NULL; | |
626 | } | |
627 | setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); | |
5fafdf24 | 628 | |
f0cbd3ec FB |
629 | getsockname(so->s,(struct sockaddr *)&addr,&addrlen); |
630 | so->so_fport = addr.sin_port; | |
a13a4126 JK |
631 | if (addr.sin_addr.s_addr == 0 || |
632 | addr.sin_addr.s_addr == loopback_addr.s_addr) { | |
460fec67 | 633 | so->so_faddr = slirp->vhost_addr; |
a13a4126 | 634 | } else { |
f0cbd3ec | 635 | so->so_faddr = addr.sin_addr; |
a13a4126 | 636 | } |
f0cbd3ec FB |
637 | so->so_lport = lport; |
638 | so->so_laddr.s_addr = laddr; | |
639 | if (flags != SS_FACCEPTONCE) | |
640 | so->so_expire = 0; | |
5fafdf24 | 641 | |
f932b6ce | 642 | so->so_state &= SS_PERSISTENT_MASK; |
6dd5ffb6 | 643 | so->so_state |= SS_ISFCONNECTED | flags; |
5fafdf24 | 644 | |
f0cbd3ec FB |
645 | return so; |
646 | } |