Root/
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
3 | * operating system. INET is implemented using the BSD Socket |
4 | * interface as the means of communication with the user level. |
5 | * |
6 | * The IP to API glue. |
7 | * |
8 | * Authors: see ip.c |
9 | * |
10 | * Fixes: |
11 | * Many : Split from ip.c , see ip.c for history. |
12 | * Martin Mares : TOS setting fixed. |
13 | * Alan Cox : Fixed a couple of oopses in Martin's |
14 | * TOS tweaks. |
15 | * Mike McLagan : Routing by source |
16 | */ |
17 | |
18 | #include <linux/module.h> |
19 | #include <linux/types.h> |
20 | #include <linux/mm.h> |
21 | #include <linux/skbuff.h> |
22 | #include <linux/ip.h> |
23 | #include <linux/icmp.h> |
24 | #include <linux/inetdevice.h> |
25 | #include <linux/netdevice.h> |
26 | #include <linux/slab.h> |
27 | #include <net/sock.h> |
28 | #include <net/ip.h> |
29 | #include <net/icmp.h> |
30 | #include <net/tcp_states.h> |
31 | #include <linux/udp.h> |
32 | #include <linux/igmp.h> |
33 | #include <linux/netfilter.h> |
34 | #include <linux/route.h> |
35 | #include <linux/mroute.h> |
36 | #include <net/route.h> |
37 | #include <net/xfrm.h> |
38 | #include <net/compat.h> |
39 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
40 | #include <net/transp_v6.h> |
41 | #endif |
42 | |
43 | #include <linux/errqueue.h> |
44 | #include <asm/uaccess.h> |
45 | |
46 | #define IP_CMSG_PKTINFO 1 |
47 | #define IP_CMSG_TTL 2 |
48 | #define IP_CMSG_TOS 4 |
49 | #define IP_CMSG_RECVOPTS 8 |
50 | #define IP_CMSG_RETOPTS 16 |
51 | #define IP_CMSG_PASSSEC 32 |
52 | #define IP_CMSG_ORIGDSTADDR 64 |
53 | |
54 | /* |
55 | * SOL_IP control messages. |
56 | */ |
57 | |
58 | static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb) |
59 | { |
60 | struct in_pktinfo info; |
61 | struct rtable *rt = skb_rtable(skb); |
62 | |
63 | info.ipi_addr.s_addr = ip_hdr(skb)->daddr; |
64 | if (rt) { |
65 | info.ipi_ifindex = rt->rt_iif; |
66 | info.ipi_spec_dst.s_addr = rt->rt_spec_dst; |
67 | } else { |
68 | info.ipi_ifindex = 0; |
69 | info.ipi_spec_dst.s_addr = 0; |
70 | } |
71 | |
72 | put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); |
73 | } |
74 | |
75 | static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb) |
76 | { |
77 | int ttl = ip_hdr(skb)->ttl; |
78 | put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl); |
79 | } |
80 | |
81 | static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb) |
82 | { |
83 | put_cmsg(msg, SOL_IP, IP_TOS, 1, &ip_hdr(skb)->tos); |
84 | } |
85 | |
86 | static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb) |
87 | { |
88 | if (IPCB(skb)->opt.optlen == 0) |
89 | return; |
90 | |
91 | put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, |
92 | ip_hdr(skb) + 1); |
93 | } |
94 | |
95 | |
96 | static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb) |
97 | { |
98 | unsigned char optbuf[sizeof(struct ip_options) + 40]; |
99 | struct ip_options * opt = (struct ip_options *)optbuf; |
100 | |
101 | if (IPCB(skb)->opt.optlen == 0) |
102 | return; |
103 | |
104 | if (ip_options_echo(opt, skb)) { |
105 | msg->msg_flags |= MSG_CTRUNC; |
106 | return; |
107 | } |
108 | ip_options_undo(opt); |
109 | |
110 | put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data); |
111 | } |
112 | |
113 | static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb) |
114 | { |
115 | char *secdata; |
116 | u32 seclen, secid; |
117 | int err; |
118 | |
119 | err = security_socket_getpeersec_dgram(NULL, skb, &secid); |
120 | if (err) |
121 | return; |
122 | |
123 | err = security_secid_to_secctx(secid, &secdata, &seclen); |
124 | if (err) |
125 | return; |
126 | |
127 | put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata); |
128 | security_release_secctx(secdata, seclen); |
129 | } |
130 | |
131 | static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb) |
132 | { |
133 | struct sockaddr_in sin; |
134 | struct iphdr *iph = ip_hdr(skb); |
135 | __be16 *ports = (__be16 *)skb_transport_header(skb); |
136 | |
137 | if (skb_transport_offset(skb) + 4 > skb->len) |
138 | return; |
139 | |
140 | /* All current transport protocols have the port numbers in the |
141 | * first four bytes of the transport header and this function is |
142 | * written with this assumption in mind. |
143 | */ |
144 | |
145 | sin.sin_family = AF_INET; |
146 | sin.sin_addr.s_addr = iph->daddr; |
147 | sin.sin_port = ports[1]; |
148 | memset(sin.sin_zero, 0, sizeof(sin.sin_zero)); |
149 | |
150 | put_cmsg(msg, SOL_IP, IP_ORIGDSTADDR, sizeof(sin), &sin); |
151 | } |
152 | |
153 | void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb) |
154 | { |
155 | struct inet_sock *inet = inet_sk(skb->sk); |
156 | unsigned flags = inet->cmsg_flags; |
157 | |
158 | /* Ordered by supposed usage frequency */ |
159 | if (flags & 1) |
160 | ip_cmsg_recv_pktinfo(msg, skb); |
161 | if ((flags >>= 1) == 0) |
162 | return; |
163 | |
164 | if (flags & 1) |
165 | ip_cmsg_recv_ttl(msg, skb); |
166 | if ((flags >>= 1) == 0) |
167 | return; |
168 | |
169 | if (flags & 1) |
170 | ip_cmsg_recv_tos(msg, skb); |
171 | if ((flags >>= 1) == 0) |
172 | return; |
173 | |
174 | if (flags & 1) |
175 | ip_cmsg_recv_opts(msg, skb); |
176 | if ((flags >>= 1) == 0) |
177 | return; |
178 | |
179 | if (flags & 1) |
180 | ip_cmsg_recv_retopts(msg, skb); |
181 | if ((flags >>= 1) == 0) |
182 | return; |
183 | |
184 | if (flags & 1) |
185 | ip_cmsg_recv_security(msg, skb); |
186 | |
187 | if ((flags >>= 1) == 0) |
188 | return; |
189 | if (flags & 1) |
190 | ip_cmsg_recv_dstaddr(msg, skb); |
191 | |
192 | } |
193 | EXPORT_SYMBOL(ip_cmsg_recv); |
194 | |
195 | int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc) |
196 | { |
197 | int err; |
198 | struct cmsghdr *cmsg; |
199 | |
200 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { |
201 | if (!CMSG_OK(msg, cmsg)) |
202 | return -EINVAL; |
203 | if (cmsg->cmsg_level != SOL_IP) |
204 | continue; |
205 | switch (cmsg->cmsg_type) { |
206 | case IP_RETOPTS: |
207 | err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)); |
208 | err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg), |
209 | err < 40 ? err : 40); |
210 | if (err) |
211 | return err; |
212 | break; |
213 | case IP_PKTINFO: |
214 | { |
215 | struct in_pktinfo *info; |
216 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo))) |
217 | return -EINVAL; |
218 | info = (struct in_pktinfo *)CMSG_DATA(cmsg); |
219 | ipc->oif = info->ipi_ifindex; |
220 | ipc->addr = info->ipi_spec_dst.s_addr; |
221 | break; |
222 | } |
223 | default: |
224 | return -EINVAL; |
225 | } |
226 | } |
227 | return 0; |
228 | } |
229 | |
230 | |
231 | /* Special input handler for packets caught by router alert option. |
232 | They are selected only by protocol field, and then processed likely |
233 | local ones; but only if someone wants them! Otherwise, router |
234 | not running rsvpd will kill RSVP. |
235 | |
236 | It is user level problem, what it will make with them. |
237 | I have no idea, how it will masquearde or NAT them (it is joke, joke :-)), |
238 | but receiver should be enough clever f.e. to forward mtrace requests, |
239 | sent to multicast group to reach destination designated router. |
240 | */ |
241 | struct ip_ra_chain *ip_ra_chain; |
242 | DEFINE_RWLOCK(ip_ra_lock); |
243 | |
244 | int ip_ra_control(struct sock *sk, unsigned char on, |
245 | void (*destructor)(struct sock *)) |
246 | { |
247 | struct ip_ra_chain *ra, *new_ra, **rap; |
248 | |
249 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num == IPPROTO_RAW) |
250 | return -EINVAL; |
251 | |
252 | new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
253 | |
254 | write_lock_bh(&ip_ra_lock); |
255 | for (rap = &ip_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { |
256 | if (ra->sk == sk) { |
257 | if (on) { |
258 | write_unlock_bh(&ip_ra_lock); |
259 | kfree(new_ra); |
260 | return -EADDRINUSE; |
261 | } |
262 | *rap = ra->next; |
263 | write_unlock_bh(&ip_ra_lock); |
264 | |
265 | if (ra->destructor) |
266 | ra->destructor(sk); |
267 | sock_put(sk); |
268 | kfree(ra); |
269 | return 0; |
270 | } |
271 | } |
272 | if (new_ra == NULL) { |
273 | write_unlock_bh(&ip_ra_lock); |
274 | return -ENOBUFS; |
275 | } |
276 | new_ra->sk = sk; |
277 | new_ra->destructor = destructor; |
278 | |
279 | new_ra->next = ra; |
280 | *rap = new_ra; |
281 | sock_hold(sk); |
282 | write_unlock_bh(&ip_ra_lock); |
283 | |
284 | return 0; |
285 | } |
286 | |
287 | void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
288 | __be16 port, u32 info, u8 *payload) |
289 | { |
290 | struct inet_sock *inet = inet_sk(sk); |
291 | struct sock_exterr_skb *serr; |
292 | |
293 | if (!inet->recverr) |
294 | return; |
295 | |
296 | skb = skb_clone(skb, GFP_ATOMIC); |
297 | if (!skb) |
298 | return; |
299 | |
300 | serr = SKB_EXT_ERR(skb); |
301 | serr->ee.ee_errno = err; |
302 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP; |
303 | serr->ee.ee_type = icmp_hdr(skb)->type; |
304 | serr->ee.ee_code = icmp_hdr(skb)->code; |
305 | serr->ee.ee_pad = 0; |
306 | serr->ee.ee_info = info; |
307 | serr->ee.ee_data = 0; |
308 | serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) - |
309 | skb_network_header(skb); |
310 | serr->port = port; |
311 | |
312 | if (skb_pull(skb, payload - skb->data) != NULL) { |
313 | skb_reset_transport_header(skb); |
314 | if (sock_queue_err_skb(sk, skb) == 0) |
315 | return; |
316 | } |
317 | kfree_skb(skb); |
318 | } |
319 | |
320 | void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info) |
321 | { |
322 | struct inet_sock *inet = inet_sk(sk); |
323 | struct sock_exterr_skb *serr; |
324 | struct iphdr *iph; |
325 | struct sk_buff *skb; |
326 | |
327 | if (!inet->recverr) |
328 | return; |
329 | |
330 | skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC); |
331 | if (!skb) |
332 | return; |
333 | |
334 | skb_put(skb, sizeof(struct iphdr)); |
335 | skb_reset_network_header(skb); |
336 | iph = ip_hdr(skb); |
337 | iph->daddr = daddr; |
338 | |
339 | serr = SKB_EXT_ERR(skb); |
340 | serr->ee.ee_errno = err; |
341 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; |
342 | serr->ee.ee_type = 0; |
343 | serr->ee.ee_code = 0; |
344 | serr->ee.ee_pad = 0; |
345 | serr->ee.ee_info = info; |
346 | serr->ee.ee_data = 0; |
347 | serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); |
348 | serr->port = port; |
349 | |
350 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
351 | skb_reset_transport_header(skb); |
352 | |
353 | if (sock_queue_err_skb(sk, skb)) |
354 | kfree_skb(skb); |
355 | } |
356 | |
357 | /* |
358 | * Handle MSG_ERRQUEUE |
359 | */ |
360 | int ip_recv_error(struct sock *sk, struct msghdr *msg, int len) |
361 | { |
362 | struct sock_exterr_skb *serr; |
363 | struct sk_buff *skb, *skb2; |
364 | struct sockaddr_in *sin; |
365 | struct { |
366 | struct sock_extended_err ee; |
367 | struct sockaddr_in offender; |
368 | } errhdr; |
369 | int err; |
370 | int copied; |
371 | |
372 | err = -EAGAIN; |
373 | skb = skb_dequeue(&sk->sk_error_queue); |
374 | if (skb == NULL) |
375 | goto out; |
376 | |
377 | copied = skb->len; |
378 | if (copied > len) { |
379 | msg->msg_flags |= MSG_TRUNC; |
380 | copied = len; |
381 | } |
382 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
383 | if (err) |
384 | goto out_free_skb; |
385 | |
386 | sock_recv_timestamp(msg, sk, skb); |
387 | |
388 | serr = SKB_EXT_ERR(skb); |
389 | |
390 | sin = (struct sockaddr_in *)msg->msg_name; |
391 | if (sin) { |
392 | sin->sin_family = AF_INET; |
393 | sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) + |
394 | serr->addr_offset); |
395 | sin->sin_port = serr->port; |
396 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
397 | } |
398 | |
399 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); |
400 | sin = &errhdr.offender; |
401 | sin->sin_family = AF_UNSPEC; |
402 | if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { |
403 | struct inet_sock *inet = inet_sk(sk); |
404 | |
405 | sin->sin_family = AF_INET; |
406 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
407 | sin->sin_port = 0; |
408 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
409 | if (inet->cmsg_flags) |
410 | ip_cmsg_recv(msg, skb); |
411 | } |
412 | |
413 | put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr); |
414 | |
415 | /* Now we could try to dump offended packet options */ |
416 | |
417 | msg->msg_flags |= MSG_ERRQUEUE; |
418 | err = copied; |
419 | |
420 | /* Reset and regenerate socket error */ |
421 | spin_lock_bh(&sk->sk_error_queue.lock); |
422 | sk->sk_err = 0; |
423 | skb2 = skb_peek(&sk->sk_error_queue); |
424 | if (skb2 != NULL) { |
425 | sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; |
426 | spin_unlock_bh(&sk->sk_error_queue.lock); |
427 | sk->sk_error_report(sk); |
428 | } else |
429 | spin_unlock_bh(&sk->sk_error_queue.lock); |
430 | |
431 | out_free_skb: |
432 | kfree_skb(skb); |
433 | out: |
434 | return err; |
435 | } |
436 | |
437 | |
438 | /* |
439 | * Socket option code for IP. This is the end of the line after any |
440 | * TCP,UDP etc options on an IP socket. |
441 | */ |
442 | |
443 | static int do_ip_setsockopt(struct sock *sk, int level, |
444 | int optname, char __user *optval, unsigned int optlen) |
445 | { |
446 | struct inet_sock *inet = inet_sk(sk); |
447 | int val = 0, err; |
448 | |
449 | if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) | |
450 | (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) | |
451 | (1<<IP_RETOPTS) | (1<<IP_TOS) | |
452 | (1<<IP_TTL) | (1<<IP_HDRINCL) | |
453 | (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) | |
454 | (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) | |
455 | (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT) | |
456 | (1<<IP_MINTTL))) || |
457 | optname == IP_MULTICAST_TTL || |
458 | optname == IP_MULTICAST_ALL || |
459 | optname == IP_MULTICAST_LOOP || |
460 | optname == IP_RECVORIGDSTADDR) { |
461 | if (optlen >= sizeof(int)) { |
462 | if (get_user(val, (int __user *) optval)) |
463 | return -EFAULT; |
464 | } else if (optlen >= sizeof(char)) { |
465 | unsigned char ucval; |
466 | |
467 | if (get_user(ucval, (unsigned char __user *) optval)) |
468 | return -EFAULT; |
469 | val = (int) ucval; |
470 | } |
471 | } |
472 | |
473 | /* If optlen==0, it is equivalent to val == 0 */ |
474 | |
475 | if (ip_mroute_opt(optname)) |
476 | return ip_mroute_setsockopt(sk, optname, optval, optlen); |
477 | |
478 | err = 0; |
479 | lock_sock(sk); |
480 | |
481 | switch (optname) { |
482 | case IP_OPTIONS: |
483 | { |
484 | struct ip_options *opt = NULL; |
485 | if (optlen > 40) |
486 | goto e_inval; |
487 | err = ip_options_get_from_user(sock_net(sk), &opt, |
488 | optval, optlen); |
489 | if (err) |
490 | break; |
491 | if (inet->is_icsk) { |
492 | struct inet_connection_sock *icsk = inet_csk(sk); |
493 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
494 | if (sk->sk_family == PF_INET || |
495 | (!((1 << sk->sk_state) & |
496 | (TCPF_LISTEN | TCPF_CLOSE)) && |
497 | inet->inet_daddr != LOOPBACK4_IPV6)) { |
498 | #endif |
499 | if (inet->opt) |
500 | icsk->icsk_ext_hdr_len -= inet->opt->optlen; |
501 | if (opt) |
502 | icsk->icsk_ext_hdr_len += opt->optlen; |
503 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); |
504 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
505 | } |
506 | #endif |
507 | } |
508 | opt = xchg(&inet->opt, opt); |
509 | kfree(opt); |
510 | break; |
511 | } |
512 | case IP_PKTINFO: |
513 | if (val) |
514 | inet->cmsg_flags |= IP_CMSG_PKTINFO; |
515 | else |
516 | inet->cmsg_flags &= ~IP_CMSG_PKTINFO; |
517 | break; |
518 | case IP_RECVTTL: |
519 | if (val) |
520 | inet->cmsg_flags |= IP_CMSG_TTL; |
521 | else |
522 | inet->cmsg_flags &= ~IP_CMSG_TTL; |
523 | break; |
524 | case IP_RECVTOS: |
525 | if (val) |
526 | inet->cmsg_flags |= IP_CMSG_TOS; |
527 | else |
528 | inet->cmsg_flags &= ~IP_CMSG_TOS; |
529 | break; |
530 | case IP_RECVOPTS: |
531 | if (val) |
532 | inet->cmsg_flags |= IP_CMSG_RECVOPTS; |
533 | else |
534 | inet->cmsg_flags &= ~IP_CMSG_RECVOPTS; |
535 | break; |
536 | case IP_RETOPTS: |
537 | if (val) |
538 | inet->cmsg_flags |= IP_CMSG_RETOPTS; |
539 | else |
540 | inet->cmsg_flags &= ~IP_CMSG_RETOPTS; |
541 | break; |
542 | case IP_PASSSEC: |
543 | if (val) |
544 | inet->cmsg_flags |= IP_CMSG_PASSSEC; |
545 | else |
546 | inet->cmsg_flags &= ~IP_CMSG_PASSSEC; |
547 | break; |
548 | case IP_RECVORIGDSTADDR: |
549 | if (val) |
550 | inet->cmsg_flags |= IP_CMSG_ORIGDSTADDR; |
551 | else |
552 | inet->cmsg_flags &= ~IP_CMSG_ORIGDSTADDR; |
553 | break; |
554 | case IP_TOS: /* This sets both TOS and Precedence */ |
555 | if (sk->sk_type == SOCK_STREAM) { |
556 | val &= ~3; |
557 | val |= inet->tos & 3; |
558 | } |
559 | if (inet->tos != val) { |
560 | inet->tos = val; |
561 | sk->sk_priority = rt_tos2priority(val); |
562 | sk_dst_reset(sk); |
563 | } |
564 | break; |
565 | case IP_TTL: |
566 | if (optlen < 1) |
567 | goto e_inval; |
568 | if (val != -1 && (val < 0 || val > 255)) |
569 | goto e_inval; |
570 | inet->uc_ttl = val; |
571 | break; |
572 | case IP_HDRINCL: |
573 | if (sk->sk_type != SOCK_RAW) { |
574 | err = -ENOPROTOOPT; |
575 | break; |
576 | } |
577 | inet->hdrincl = val ? 1 : 0; |
578 | break; |
579 | case IP_MTU_DISCOVER: |
580 | if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) |
581 | goto e_inval; |
582 | inet->pmtudisc = val; |
583 | break; |
584 | case IP_RECVERR: |
585 | inet->recverr = !!val; |
586 | if (!val) |
587 | skb_queue_purge(&sk->sk_error_queue); |
588 | break; |
589 | case IP_MULTICAST_TTL: |
590 | if (sk->sk_type == SOCK_STREAM) |
591 | goto e_inval; |
592 | if (optlen < 1) |
593 | goto e_inval; |
594 | if (val == -1) |
595 | val = 1; |
596 | if (val < 0 || val > 255) |
597 | goto e_inval; |
598 | inet->mc_ttl = val; |
599 | break; |
600 | case IP_MULTICAST_LOOP: |
601 | if (optlen < 1) |
602 | goto e_inval; |
603 | inet->mc_loop = !!val; |
604 | break; |
605 | case IP_MULTICAST_IF: |
606 | { |
607 | struct ip_mreqn mreq; |
608 | struct net_device *dev = NULL; |
609 | |
610 | if (sk->sk_type == SOCK_STREAM) |
611 | goto e_inval; |
612 | /* |
613 | * Check the arguments are allowable |
614 | */ |
615 | |
616 | if (optlen < sizeof(struct in_addr)) |
617 | goto e_inval; |
618 | |
619 | err = -EFAULT; |
620 | if (optlen >= sizeof(struct ip_mreqn)) { |
621 | if (copy_from_user(&mreq, optval, sizeof(mreq))) |
622 | break; |
623 | } else { |
624 | memset(&mreq, 0, sizeof(mreq)); |
625 | if (optlen >= sizeof(struct in_addr) && |
626 | copy_from_user(&mreq.imr_address, optval, |
627 | sizeof(struct in_addr))) |
628 | break; |
629 | } |
630 | |
631 | if (!mreq.imr_ifindex) { |
632 | if (mreq.imr_address.s_addr == htonl(INADDR_ANY)) { |
633 | inet->mc_index = 0; |
634 | inet->mc_addr = 0; |
635 | err = 0; |
636 | break; |
637 | } |
638 | dev = ip_dev_find(sock_net(sk), mreq.imr_address.s_addr); |
639 | if (dev) |
640 | mreq.imr_ifindex = dev->ifindex; |
641 | } else |
642 | dev = dev_get_by_index(sock_net(sk), mreq.imr_ifindex); |
643 | |
644 | |
645 | err = -EADDRNOTAVAIL; |
646 | if (!dev) |
647 | break; |
648 | dev_put(dev); |
649 | |
650 | err = -EINVAL; |
651 | if (sk->sk_bound_dev_if && |
652 | mreq.imr_ifindex != sk->sk_bound_dev_if) |
653 | break; |
654 | |
655 | inet->mc_index = mreq.imr_ifindex; |
656 | inet->mc_addr = mreq.imr_address.s_addr; |
657 | err = 0; |
658 | break; |
659 | } |
660 | |
661 | case IP_ADD_MEMBERSHIP: |
662 | case IP_DROP_MEMBERSHIP: |
663 | { |
664 | struct ip_mreqn mreq; |
665 | |
666 | err = -EPROTO; |
667 | if (inet_sk(sk)->is_icsk) |
668 | break; |
669 | |
670 | if (optlen < sizeof(struct ip_mreq)) |
671 | goto e_inval; |
672 | err = -EFAULT; |
673 | if (optlen >= sizeof(struct ip_mreqn)) { |
674 | if (copy_from_user(&mreq, optval, sizeof(mreq))) |
675 | break; |
676 | } else { |
677 | memset(&mreq, 0, sizeof(mreq)); |
678 | if (copy_from_user(&mreq, optval, sizeof(struct ip_mreq))) |
679 | break; |
680 | } |
681 | |
682 | if (optname == IP_ADD_MEMBERSHIP) |
683 | err = ip_mc_join_group(sk, &mreq); |
684 | else |
685 | err = ip_mc_leave_group(sk, &mreq); |
686 | break; |
687 | } |
688 | case IP_MSFILTER: |
689 | { |
690 | struct ip_msfilter *msf; |
691 | |
692 | if (optlen < IP_MSFILTER_SIZE(0)) |
693 | goto e_inval; |
694 | if (optlen > sysctl_optmem_max) { |
695 | err = -ENOBUFS; |
696 | break; |
697 | } |
698 | msf = kmalloc(optlen, GFP_KERNEL); |
699 | if (!msf) { |
700 | err = -ENOBUFS; |
701 | break; |
702 | } |
703 | err = -EFAULT; |
704 | if (copy_from_user(msf, optval, optlen)) { |
705 | kfree(msf); |
706 | break; |
707 | } |
708 | /* numsrc >= (1G-4) overflow in 32 bits */ |
709 | if (msf->imsf_numsrc >= 0x3ffffffcU || |
710 | msf->imsf_numsrc > sysctl_igmp_max_msf) { |
711 | kfree(msf); |
712 | err = -ENOBUFS; |
713 | break; |
714 | } |
715 | if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) { |
716 | kfree(msf); |
717 | err = -EINVAL; |
718 | break; |
719 | } |
720 | err = ip_mc_msfilter(sk, msf, 0); |
721 | kfree(msf); |
722 | break; |
723 | } |
724 | case IP_BLOCK_SOURCE: |
725 | case IP_UNBLOCK_SOURCE: |
726 | case IP_ADD_SOURCE_MEMBERSHIP: |
727 | case IP_DROP_SOURCE_MEMBERSHIP: |
728 | { |
729 | struct ip_mreq_source mreqs; |
730 | int omode, add; |
731 | |
732 | if (optlen != sizeof(struct ip_mreq_source)) |
733 | goto e_inval; |
734 | if (copy_from_user(&mreqs, optval, sizeof(mreqs))) { |
735 | err = -EFAULT; |
736 | break; |
737 | } |
738 | if (optname == IP_BLOCK_SOURCE) { |
739 | omode = MCAST_EXCLUDE; |
740 | add = 1; |
741 | } else if (optname == IP_UNBLOCK_SOURCE) { |
742 | omode = MCAST_EXCLUDE; |
743 | add = 0; |
744 | } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) { |
745 | struct ip_mreqn mreq; |
746 | |
747 | mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr; |
748 | mreq.imr_address.s_addr = mreqs.imr_interface; |
749 | mreq.imr_ifindex = 0; |
750 | err = ip_mc_join_group(sk, &mreq); |
751 | if (err && err != -EADDRINUSE) |
752 | break; |
753 | omode = MCAST_INCLUDE; |
754 | add = 1; |
755 | } else /* IP_DROP_SOURCE_MEMBERSHIP */ { |
756 | omode = MCAST_INCLUDE; |
757 | add = 0; |
758 | } |
759 | err = ip_mc_source(add, omode, sk, &mreqs, 0); |
760 | break; |
761 | } |
762 | case MCAST_JOIN_GROUP: |
763 | case MCAST_LEAVE_GROUP: |
764 | { |
765 | struct group_req greq; |
766 | struct sockaddr_in *psin; |
767 | struct ip_mreqn mreq; |
768 | |
769 | if (optlen < sizeof(struct group_req)) |
770 | goto e_inval; |
771 | err = -EFAULT; |
772 | if (copy_from_user(&greq, optval, sizeof(greq))) |
773 | break; |
774 | psin = (struct sockaddr_in *)&greq.gr_group; |
775 | if (psin->sin_family != AF_INET) |
776 | goto e_inval; |
777 | memset(&mreq, 0, sizeof(mreq)); |
778 | mreq.imr_multiaddr = psin->sin_addr; |
779 | mreq.imr_ifindex = greq.gr_interface; |
780 | |
781 | if (optname == MCAST_JOIN_GROUP) |
782 | err = ip_mc_join_group(sk, &mreq); |
783 | else |
784 | err = ip_mc_leave_group(sk, &mreq); |
785 | break; |
786 | } |
787 | case MCAST_JOIN_SOURCE_GROUP: |
788 | case MCAST_LEAVE_SOURCE_GROUP: |
789 | case MCAST_BLOCK_SOURCE: |
790 | case MCAST_UNBLOCK_SOURCE: |
791 | { |
792 | struct group_source_req greqs; |
793 | struct ip_mreq_source mreqs; |
794 | struct sockaddr_in *psin; |
795 | int omode, add; |
796 | |
797 | if (optlen != sizeof(struct group_source_req)) |
798 | goto e_inval; |
799 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { |
800 | err = -EFAULT; |
801 | break; |
802 | } |
803 | if (greqs.gsr_group.ss_family != AF_INET || |
804 | greqs.gsr_source.ss_family != AF_INET) { |
805 | err = -EADDRNOTAVAIL; |
806 | break; |
807 | } |
808 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
809 | mreqs.imr_multiaddr = psin->sin_addr.s_addr; |
810 | psin = (struct sockaddr_in *)&greqs.gsr_source; |
811 | mreqs.imr_sourceaddr = psin->sin_addr.s_addr; |
812 | mreqs.imr_interface = 0; /* use index for mc_source */ |
813 | |
814 | if (optname == MCAST_BLOCK_SOURCE) { |
815 | omode = MCAST_EXCLUDE; |
816 | add = 1; |
817 | } else if (optname == MCAST_UNBLOCK_SOURCE) { |
818 | omode = MCAST_EXCLUDE; |
819 | add = 0; |
820 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { |
821 | struct ip_mreqn mreq; |
822 | |
823 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
824 | mreq.imr_multiaddr = psin->sin_addr; |
825 | mreq.imr_address.s_addr = 0; |
826 | mreq.imr_ifindex = greqs.gsr_interface; |
827 | err = ip_mc_join_group(sk, &mreq); |
828 | if (err && err != -EADDRINUSE) |
829 | break; |
830 | greqs.gsr_interface = mreq.imr_ifindex; |
831 | omode = MCAST_INCLUDE; |
832 | add = 1; |
833 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
834 | omode = MCAST_INCLUDE; |
835 | add = 0; |
836 | } |
837 | err = ip_mc_source(add, omode, sk, &mreqs, |
838 | greqs.gsr_interface); |
839 | break; |
840 | } |
841 | case MCAST_MSFILTER: |
842 | { |
843 | struct sockaddr_in *psin; |
844 | struct ip_msfilter *msf = NULL; |
845 | struct group_filter *gsf = NULL; |
846 | int msize, i, ifindex; |
847 | |
848 | if (optlen < GROUP_FILTER_SIZE(0)) |
849 | goto e_inval; |
850 | if (optlen > sysctl_optmem_max) { |
851 | err = -ENOBUFS; |
852 | break; |
853 | } |
854 | gsf = kmalloc(optlen, GFP_KERNEL); |
855 | if (!gsf) { |
856 | err = -ENOBUFS; |
857 | break; |
858 | } |
859 | err = -EFAULT; |
860 | if (copy_from_user(gsf, optval, optlen)) |
861 | goto mc_msf_out; |
862 | |
863 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ |
864 | if (gsf->gf_numsrc >= 0x1ffffff || |
865 | gsf->gf_numsrc > sysctl_igmp_max_msf) { |
866 | err = -ENOBUFS; |
867 | goto mc_msf_out; |
868 | } |
869 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { |
870 | err = -EINVAL; |
871 | goto mc_msf_out; |
872 | } |
873 | msize = IP_MSFILTER_SIZE(gsf->gf_numsrc); |
874 | msf = kmalloc(msize, GFP_KERNEL); |
875 | if (!msf) { |
876 | err = -ENOBUFS; |
877 | goto mc_msf_out; |
878 | } |
879 | ifindex = gsf->gf_interface; |
880 | psin = (struct sockaddr_in *)&gsf->gf_group; |
881 | if (psin->sin_family != AF_INET) { |
882 | err = -EADDRNOTAVAIL; |
883 | goto mc_msf_out; |
884 | } |
885 | msf->imsf_multiaddr = psin->sin_addr.s_addr; |
886 | msf->imsf_interface = 0; |
887 | msf->imsf_fmode = gsf->gf_fmode; |
888 | msf->imsf_numsrc = gsf->gf_numsrc; |
889 | err = -EADDRNOTAVAIL; |
890 | for (i = 0; i < gsf->gf_numsrc; ++i) { |
891 | psin = (struct sockaddr_in *)&gsf->gf_slist[i]; |
892 | |
893 | if (psin->sin_family != AF_INET) |
894 | goto mc_msf_out; |
895 | msf->imsf_slist[i] = psin->sin_addr.s_addr; |
896 | } |
897 | kfree(gsf); |
898 | gsf = NULL; |
899 | |
900 | err = ip_mc_msfilter(sk, msf, ifindex); |
901 | mc_msf_out: |
902 | kfree(msf); |
903 | kfree(gsf); |
904 | break; |
905 | } |
906 | case IP_MULTICAST_ALL: |
907 | if (optlen < 1) |
908 | goto e_inval; |
909 | if (val != 0 && val != 1) |
910 | goto e_inval; |
911 | inet->mc_all = val; |
912 | break; |
913 | case IP_ROUTER_ALERT: |
914 | err = ip_ra_control(sk, val ? 1 : 0, NULL); |
915 | break; |
916 | |
917 | case IP_FREEBIND: |
918 | if (optlen < 1) |
919 | goto e_inval; |
920 | inet->freebind = !!val; |
921 | break; |
922 | |
923 | case IP_IPSEC_POLICY: |
924 | case IP_XFRM_POLICY: |
925 | err = -EPERM; |
926 | if (!capable(CAP_NET_ADMIN)) |
927 | break; |
928 | err = xfrm_user_policy(sk, optname, optval, optlen); |
929 | break; |
930 | |
931 | case IP_TRANSPARENT: |
932 | if (!capable(CAP_NET_ADMIN)) { |
933 | err = -EPERM; |
934 | break; |
935 | } |
936 | if (optlen < 1) |
937 | goto e_inval; |
938 | inet->transparent = !!val; |
939 | break; |
940 | |
941 | case IP_MINTTL: |
942 | if (optlen < 1) |
943 | goto e_inval; |
944 | if (val < 0 || val > 255) |
945 | goto e_inval; |
946 | inet->min_ttl = val; |
947 | break; |
948 | |
949 | default: |
950 | err = -ENOPROTOOPT; |
951 | break; |
952 | } |
953 | release_sock(sk); |
954 | return err; |
955 | |
956 | e_inval: |
957 | release_sock(sk); |
958 | return -EINVAL; |
959 | } |
960 | |
961 | int ip_setsockopt(struct sock *sk, int level, |
962 | int optname, char __user *optval, unsigned int optlen) |
963 | { |
964 | int err; |
965 | |
966 | if (level != SOL_IP) |
967 | return -ENOPROTOOPT; |
968 | |
969 | err = do_ip_setsockopt(sk, level, optname, optval, optlen); |
970 | #ifdef CONFIG_NETFILTER |
971 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
972 | if (err == -ENOPROTOOPT && optname != IP_HDRINCL && |
973 | optname != IP_IPSEC_POLICY && |
974 | optname != IP_XFRM_POLICY && |
975 | !ip_mroute_opt(optname)) { |
976 | lock_sock(sk); |
977 | err = nf_setsockopt(sk, PF_INET, optname, optval, optlen); |
978 | release_sock(sk); |
979 | } |
980 | #endif |
981 | return err; |
982 | } |
983 | EXPORT_SYMBOL(ip_setsockopt); |
984 | |
985 | #ifdef CONFIG_COMPAT |
986 | int compat_ip_setsockopt(struct sock *sk, int level, int optname, |
987 | char __user *optval, unsigned int optlen) |
988 | { |
989 | int err; |
990 | |
991 | if (level != SOL_IP) |
992 | return -ENOPROTOOPT; |
993 | |
994 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
995 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, |
996 | ip_setsockopt); |
997 | |
998 | err = do_ip_setsockopt(sk, level, optname, optval, optlen); |
999 | #ifdef CONFIG_NETFILTER |
1000 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1001 | if (err == -ENOPROTOOPT && optname != IP_HDRINCL && |
1002 | optname != IP_IPSEC_POLICY && |
1003 | optname != IP_XFRM_POLICY && |
1004 | !ip_mroute_opt(optname)) { |
1005 | lock_sock(sk); |
1006 | err = compat_nf_setsockopt(sk, PF_INET, optname, |
1007 | optval, optlen); |
1008 | release_sock(sk); |
1009 | } |
1010 | #endif |
1011 | return err; |
1012 | } |
1013 | EXPORT_SYMBOL(compat_ip_setsockopt); |
1014 | #endif |
1015 | |
1016 | /* |
1017 | * Get the options. Note for future reference. The GET of IP options gets |
1018 | * the _received_ ones. The set sets the _sent_ ones. |
1019 | */ |
1020 | |
1021 | static int do_ip_getsockopt(struct sock *sk, int level, int optname, |
1022 | char __user *optval, int __user *optlen) |
1023 | { |
1024 | struct inet_sock *inet = inet_sk(sk); |
1025 | int val; |
1026 | int len; |
1027 | |
1028 | if (level != SOL_IP) |
1029 | return -EOPNOTSUPP; |
1030 | |
1031 | if (ip_mroute_opt(optname)) |
1032 | return ip_mroute_getsockopt(sk, optname, optval, optlen); |
1033 | |
1034 | if (get_user(len, optlen)) |
1035 | return -EFAULT; |
1036 | if (len < 0) |
1037 | return -EINVAL; |
1038 | |
1039 | lock_sock(sk); |
1040 | |
1041 | switch (optname) { |
1042 | case IP_OPTIONS: |
1043 | { |
1044 | unsigned char optbuf[sizeof(struct ip_options)+40]; |
1045 | struct ip_options * opt = (struct ip_options *)optbuf; |
1046 | opt->optlen = 0; |
1047 | if (inet->opt) |
1048 | memcpy(optbuf, inet->opt, |
1049 | sizeof(struct ip_options)+ |
1050 | inet->opt->optlen); |
1051 | release_sock(sk); |
1052 | |
1053 | if (opt->optlen == 0) |
1054 | return put_user(0, optlen); |
1055 | |
1056 | ip_options_undo(opt); |
1057 | |
1058 | len = min_t(unsigned int, len, opt->optlen); |
1059 | if (put_user(len, optlen)) |
1060 | return -EFAULT; |
1061 | if (copy_to_user(optval, opt->__data, len)) |
1062 | return -EFAULT; |
1063 | return 0; |
1064 | } |
1065 | case IP_PKTINFO: |
1066 | val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0; |
1067 | break; |
1068 | case IP_RECVTTL: |
1069 | val = (inet->cmsg_flags & IP_CMSG_TTL) != 0; |
1070 | break; |
1071 | case IP_RECVTOS: |
1072 | val = (inet->cmsg_flags & IP_CMSG_TOS) != 0; |
1073 | break; |
1074 | case IP_RECVOPTS: |
1075 | val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0; |
1076 | break; |
1077 | case IP_RETOPTS: |
1078 | val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0; |
1079 | break; |
1080 | case IP_PASSSEC: |
1081 | val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0; |
1082 | break; |
1083 | case IP_RECVORIGDSTADDR: |
1084 | val = (inet->cmsg_flags & IP_CMSG_ORIGDSTADDR) != 0; |
1085 | break; |
1086 | case IP_TOS: |
1087 | val = inet->tos; |
1088 | break; |
1089 | case IP_TTL: |
1090 | val = (inet->uc_ttl == -1 ? |
1091 | sysctl_ip_default_ttl : |
1092 | inet->uc_ttl); |
1093 | break; |
1094 | case IP_HDRINCL: |
1095 | val = inet->hdrincl; |
1096 | break; |
1097 | case IP_MTU_DISCOVER: |
1098 | val = inet->pmtudisc; |
1099 | break; |
1100 | case IP_MTU: |
1101 | { |
1102 | struct dst_entry *dst; |
1103 | val = 0; |
1104 | dst = sk_dst_get(sk); |
1105 | if (dst) { |
1106 | val = dst_mtu(dst); |
1107 | dst_release(dst); |
1108 | } |
1109 | if (!val) { |
1110 | release_sock(sk); |
1111 | return -ENOTCONN; |
1112 | } |
1113 | break; |
1114 | } |
1115 | case IP_RECVERR: |
1116 | val = inet->recverr; |
1117 | break; |
1118 | case IP_MULTICAST_TTL: |
1119 | val = inet->mc_ttl; |
1120 | break; |
1121 | case IP_MULTICAST_LOOP: |
1122 | val = inet->mc_loop; |
1123 | break; |
1124 | case IP_MULTICAST_IF: |
1125 | { |
1126 | struct in_addr addr; |
1127 | len = min_t(unsigned int, len, sizeof(struct in_addr)); |
1128 | addr.s_addr = inet->mc_addr; |
1129 | release_sock(sk); |
1130 | |
1131 | if (put_user(len, optlen)) |
1132 | return -EFAULT; |
1133 | if (copy_to_user(optval, &addr, len)) |
1134 | return -EFAULT; |
1135 | return 0; |
1136 | } |
1137 | case IP_MSFILTER: |
1138 | { |
1139 | struct ip_msfilter msf; |
1140 | int err; |
1141 | |
1142 | if (len < IP_MSFILTER_SIZE(0)) { |
1143 | release_sock(sk); |
1144 | return -EINVAL; |
1145 | } |
1146 | if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) { |
1147 | release_sock(sk); |
1148 | return -EFAULT; |
1149 | } |
1150 | err = ip_mc_msfget(sk, &msf, |
1151 | (struct ip_msfilter __user *)optval, optlen); |
1152 | release_sock(sk); |
1153 | return err; |
1154 | } |
1155 | case MCAST_MSFILTER: |
1156 | { |
1157 | struct group_filter gsf; |
1158 | int err; |
1159 | |
1160 | if (len < GROUP_FILTER_SIZE(0)) { |
1161 | release_sock(sk); |
1162 | return -EINVAL; |
1163 | } |
1164 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) { |
1165 | release_sock(sk); |
1166 | return -EFAULT; |
1167 | } |
1168 | err = ip_mc_gsfget(sk, &gsf, |
1169 | (struct group_filter __user *)optval, |
1170 | optlen); |
1171 | release_sock(sk); |
1172 | return err; |
1173 | } |
1174 | case IP_MULTICAST_ALL: |
1175 | val = inet->mc_all; |
1176 | break; |
1177 | case IP_PKTOPTIONS: |
1178 | { |
1179 | struct msghdr msg; |
1180 | |
1181 | release_sock(sk); |
1182 | |
1183 | if (sk->sk_type != SOCK_STREAM) |
1184 | return -ENOPROTOOPT; |
1185 | |
1186 | msg.msg_control = optval; |
1187 | msg.msg_controllen = len; |
1188 | msg.msg_flags = 0; |
1189 | |
1190 | if (inet->cmsg_flags & IP_CMSG_PKTINFO) { |
1191 | struct in_pktinfo info; |
1192 | |
1193 | info.ipi_addr.s_addr = inet->inet_rcv_saddr; |
1194 | info.ipi_spec_dst.s_addr = inet->inet_rcv_saddr; |
1195 | info.ipi_ifindex = inet->mc_index; |
1196 | put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); |
1197 | } |
1198 | if (inet->cmsg_flags & IP_CMSG_TTL) { |
1199 | int hlim = inet->mc_ttl; |
1200 | put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim); |
1201 | } |
1202 | len -= msg.msg_controllen; |
1203 | return put_user(len, optlen); |
1204 | } |
1205 | case IP_FREEBIND: |
1206 | val = inet->freebind; |
1207 | break; |
1208 | case IP_TRANSPARENT: |
1209 | val = inet->transparent; |
1210 | break; |
1211 | case IP_MINTTL: |
1212 | val = inet->min_ttl; |
1213 | break; |
1214 | default: |
1215 | release_sock(sk); |
1216 | return -ENOPROTOOPT; |
1217 | } |
1218 | release_sock(sk); |
1219 | |
1220 | if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) { |
1221 | unsigned char ucval = (unsigned char)val; |
1222 | len = 1; |
1223 | if (put_user(len, optlen)) |
1224 | return -EFAULT; |
1225 | if (copy_to_user(optval, &ucval, 1)) |
1226 | return -EFAULT; |
1227 | } else { |
1228 | len = min_t(unsigned int, sizeof(int), len); |
1229 | if (put_user(len, optlen)) |
1230 | return -EFAULT; |
1231 | if (copy_to_user(optval, &val, len)) |
1232 | return -EFAULT; |
1233 | } |
1234 | return 0; |
1235 | } |
1236 | |
1237 | int ip_getsockopt(struct sock *sk, int level, |
1238 | int optname, char __user *optval, int __user *optlen) |
1239 | { |
1240 | int err; |
1241 | |
1242 | err = do_ip_getsockopt(sk, level, optname, optval, optlen); |
1243 | #ifdef CONFIG_NETFILTER |
1244 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1245 | if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS && |
1246 | !ip_mroute_opt(optname)) { |
1247 | int len; |
1248 | |
1249 | if (get_user(len, optlen)) |
1250 | return -EFAULT; |
1251 | |
1252 | lock_sock(sk); |
1253 | err = nf_getsockopt(sk, PF_INET, optname, optval, |
1254 | &len); |
1255 | release_sock(sk); |
1256 | if (err >= 0) |
1257 | err = put_user(len, optlen); |
1258 | return err; |
1259 | } |
1260 | #endif |
1261 | return err; |
1262 | } |
1263 | EXPORT_SYMBOL(ip_getsockopt); |
1264 | |
1265 | #ifdef CONFIG_COMPAT |
1266 | int compat_ip_getsockopt(struct sock *sk, int level, int optname, |
1267 | char __user *optval, int __user *optlen) |
1268 | { |
1269 | int err; |
1270 | |
1271 | if (optname == MCAST_MSFILTER) |
1272 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, |
1273 | ip_getsockopt); |
1274 | |
1275 | err = do_ip_getsockopt(sk, level, optname, optval, optlen); |
1276 | |
1277 | #ifdef CONFIG_NETFILTER |
1278 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1279 | if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS && |
1280 | !ip_mroute_opt(optname)) { |
1281 | int len; |
1282 | |
1283 | if (get_user(len, optlen)) |
1284 | return -EFAULT; |
1285 | |
1286 | lock_sock(sk); |
1287 | err = compat_nf_getsockopt(sk, PF_INET, optname, optval, &len); |
1288 | release_sock(sk); |
1289 | if (err >= 0) |
1290 | err = put_user(len, optlen); |
1291 | return err; |
1292 | } |
1293 | #endif |
1294 | return err; |
1295 | } |
1296 | EXPORT_SYMBOL(compat_ip_getsockopt); |
1297 | #endif |
1298 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9