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Commit | Line | Data |
---|---|---|
1da177e4 LT |
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. | |
e905a9ed | 7 | * |
1da177e4 LT |
8 | * Version: $Id: ip_sockglue.c,v 1.62 2002/02/01 22:01:04 davem Exp $ |
9 | * | |
10 | * Authors: see ip.c | |
11 | * | |
12 | * Fixes: | |
13 | * Many : Split from ip.c , see ip.c for history. | |
14 | * Martin Mares : TOS setting fixed. | |
e905a9ed | 15 | * Alan Cox : Fixed a couple of oopses in Martin's |
1da177e4 LT |
16 | * TOS tweaks. |
17 | * Mike McLagan : Routing by source | |
18 | */ | |
19 | ||
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/types.h> | |
22 | #include <linux/mm.h> | |
1da177e4 LT |
23 | #include <linux/skbuff.h> |
24 | #include <linux/ip.h> | |
25 | #include <linux/icmp.h> | |
14c85021 | 26 | #include <linux/inetdevice.h> |
1da177e4 LT |
27 | #include <linux/netdevice.h> |
28 | #include <net/sock.h> | |
29 | #include <net/ip.h> | |
30 | #include <net/icmp.h> | |
d83d8461 | 31 | #include <net/tcp_states.h> |
1da177e4 LT |
32 | #include <linux/udp.h> |
33 | #include <linux/igmp.h> | |
34 | #include <linux/netfilter.h> | |
35 | #include <linux/route.h> | |
36 | #include <linux/mroute.h> | |
37 | #include <net/route.h> | |
38 | #include <net/xfrm.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 | |
2c7946a7 | 51 | #define IP_CMSG_PASSSEC 32 |
1da177e4 LT |
52 | |
53 | /* | |
54 | * SOL_IP control messages. | |
55 | */ | |
56 | ||
57 | static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb) | |
58 | { | |
59 | struct in_pktinfo info; | |
60 | struct rtable *rt = (struct rtable *)skb->dst; | |
61 | ||
eddc9ec5 | 62 | info.ipi_addr.s_addr = ip_hdr(skb)->daddr; |
1da177e4 LT |
63 | if (rt) { |
64 | info.ipi_ifindex = rt->rt_iif; | |
65 | info.ipi_spec_dst.s_addr = rt->rt_spec_dst; | |
66 | } else { | |
67 | info.ipi_ifindex = 0; | |
68 | info.ipi_spec_dst.s_addr = 0; | |
69 | } | |
70 | ||
71 | put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); | |
72 | } | |
73 | ||
74 | static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb) | |
75 | { | |
eddc9ec5 | 76 | int ttl = ip_hdr(skb)->ttl; |
1da177e4 LT |
77 | put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl); |
78 | } | |
79 | ||
80 | static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb) | |
81 | { | |
eddc9ec5 | 82 | put_cmsg(msg, SOL_IP, IP_TOS, 1, &ip_hdr(skb)->tos); |
1da177e4 LT |
83 | } |
84 | ||
85 | static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb) | |
86 | { | |
87 | if (IPCB(skb)->opt.optlen == 0) | |
88 | return; | |
89 | ||
eddc9ec5 ACM |
90 | put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, |
91 | ip_hdr(skb) + 1); | |
1da177e4 LT |
92 | } |
93 | ||
94 | ||
95 | static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb) | |
96 | { | |
97 | unsigned char optbuf[sizeof(struct ip_options) + 40]; | |
98 | struct ip_options * opt = (struct ip_options*)optbuf; | |
99 | ||
100 | if (IPCB(skb)->opt.optlen == 0) | |
101 | return; | |
102 | ||
103 | if (ip_options_echo(opt, skb)) { | |
104 | msg->msg_flags |= MSG_CTRUNC; | |
105 | return; | |
106 | } | |
107 | ip_options_undo(opt); | |
108 | ||
109 | put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data); | |
110 | } | |
111 | ||
2c7946a7 CZ |
112 | static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb) |
113 | { | |
114 | char *secdata; | |
dc49c1f9 | 115 | u32 seclen, secid; |
2c7946a7 CZ |
116 | int err; |
117 | ||
dc49c1f9 CZ |
118 | err = security_socket_getpeersec_dgram(NULL, skb, &secid); |
119 | if (err) | |
120 | return; | |
121 | ||
122 | err = security_secid_to_secctx(secid, &secdata, &seclen); | |
2c7946a7 CZ |
123 | if (err) |
124 | return; | |
125 | ||
126 | put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata); | |
dc49c1f9 | 127 | security_release_secctx(secdata, seclen); |
2c7946a7 CZ |
128 | } |
129 | ||
1da177e4 LT |
130 | |
131 | void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb) | |
132 | { | |
133 | struct inet_sock *inet = inet_sk(skb->sk); | |
134 | unsigned flags = inet->cmsg_flags; | |
135 | ||
136 | /* Ordered by supposed usage frequency */ | |
137 | if (flags & 1) | |
138 | ip_cmsg_recv_pktinfo(msg, skb); | |
139 | if ((flags>>=1) == 0) | |
140 | return; | |
141 | ||
142 | if (flags & 1) | |
143 | ip_cmsg_recv_ttl(msg, skb); | |
144 | if ((flags>>=1) == 0) | |
145 | return; | |
146 | ||
147 | if (flags & 1) | |
148 | ip_cmsg_recv_tos(msg, skb); | |
149 | if ((flags>>=1) == 0) | |
150 | return; | |
151 | ||
152 | if (flags & 1) | |
153 | ip_cmsg_recv_opts(msg, skb); | |
154 | if ((flags>>=1) == 0) | |
155 | return; | |
156 | ||
157 | if (flags & 1) | |
158 | ip_cmsg_recv_retopts(msg, skb); | |
2c7946a7 CZ |
159 | if ((flags>>=1) == 0) |
160 | return; | |
161 | ||
162 | if (flags & 1) | |
163 | ip_cmsg_recv_security(msg, skb); | |
1da177e4 LT |
164 | } |
165 | ||
166 | int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc) | |
167 | { | |
168 | int err; | |
169 | struct cmsghdr *cmsg; | |
170 | ||
171 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { | |
172 | if (!CMSG_OK(msg, cmsg)) | |
173 | return -EINVAL; | |
174 | if (cmsg->cmsg_level != SOL_IP) | |
175 | continue; | |
176 | switch (cmsg->cmsg_type) { | |
177 | case IP_RETOPTS: | |
178 | err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)); | |
4c6ea29d | 179 | err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40); |
1da177e4 LT |
180 | if (err) |
181 | return err; | |
182 | break; | |
183 | case IP_PKTINFO: | |
184 | { | |
185 | struct in_pktinfo *info; | |
186 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo))) | |
187 | return -EINVAL; | |
188 | info = (struct in_pktinfo *)CMSG_DATA(cmsg); | |
189 | ipc->oif = info->ipi_ifindex; | |
190 | ipc->addr = info->ipi_spec_dst.s_addr; | |
191 | break; | |
192 | } | |
193 | default: | |
194 | return -EINVAL; | |
195 | } | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
200 | ||
201 | /* Special input handler for packets caught by router alert option. | |
202 | They are selected only by protocol field, and then processed likely | |
203 | local ones; but only if someone wants them! Otherwise, router | |
204 | not running rsvpd will kill RSVP. | |
205 | ||
206 | It is user level problem, what it will make with them. | |
207 | I have no idea, how it will masquearde or NAT them (it is joke, joke :-)), | |
208 | but receiver should be enough clever f.e. to forward mtrace requests, | |
209 | sent to multicast group to reach destination designated router. | |
210 | */ | |
211 | struct ip_ra_chain *ip_ra_chain; | |
212 | DEFINE_RWLOCK(ip_ra_lock); | |
213 | ||
214 | int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)) | |
215 | { | |
216 | struct ip_ra_chain *ra, *new_ra, **rap; | |
217 | ||
218 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW) | |
219 | return -EINVAL; | |
220 | ||
221 | new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
222 | ||
223 | write_lock_bh(&ip_ra_lock); | |
224 | for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
225 | if (ra->sk == sk) { | |
226 | if (on) { | |
227 | write_unlock_bh(&ip_ra_lock); | |
a51482bd | 228 | kfree(new_ra); |
1da177e4 LT |
229 | return -EADDRINUSE; |
230 | } | |
231 | *rap = ra->next; | |
232 | write_unlock_bh(&ip_ra_lock); | |
233 | ||
234 | if (ra->destructor) | |
235 | ra->destructor(sk); | |
236 | sock_put(sk); | |
237 | kfree(ra); | |
238 | return 0; | |
239 | } | |
240 | } | |
241 | if (new_ra == NULL) { | |
242 | write_unlock_bh(&ip_ra_lock); | |
243 | return -ENOBUFS; | |
244 | } | |
245 | new_ra->sk = sk; | |
246 | new_ra->destructor = destructor; | |
247 | ||
248 | new_ra->next = ra; | |
249 | *rap = new_ra; | |
250 | sock_hold(sk); | |
251 | write_unlock_bh(&ip_ra_lock); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
e905a9ed | 256 | void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
35986b32 | 257 | __be16 port, u32 info, u8 *payload) |
1da177e4 LT |
258 | { |
259 | struct inet_sock *inet = inet_sk(sk); | |
260 | struct sock_exterr_skb *serr; | |
261 | ||
262 | if (!inet->recverr) | |
263 | return; | |
264 | ||
265 | skb = skb_clone(skb, GFP_ATOMIC); | |
266 | if (!skb) | |
267 | return; | |
268 | ||
e905a9ed | 269 | serr = SKB_EXT_ERR(skb); |
1da177e4 LT |
270 | serr->ee.ee_errno = err; |
271 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP; | |
88c7664f ACM |
272 | serr->ee.ee_type = icmp_hdr(skb)->type; |
273 | serr->ee.ee_code = icmp_hdr(skb)->code; | |
1da177e4 LT |
274 | serr->ee.ee_pad = 0; |
275 | serr->ee.ee_info = info; | |
276 | serr->ee.ee_data = 0; | |
88c7664f | 277 | serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) - |
d56f90a7 | 278 | skb_network_header(skb); |
1da177e4 LT |
279 | serr->port = port; |
280 | ||
bd82393c ACM |
281 | if (skb_pull(skb, payload - skb->data) != NULL) { |
282 | skb_reset_transport_header(skb); | |
283 | if (sock_queue_err_skb(sk, skb) == 0) | |
284 | return; | |
285 | } | |
286 | kfree_skb(skb); | |
1da177e4 LT |
287 | } |
288 | ||
0579016e | 289 | void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info) |
1da177e4 LT |
290 | { |
291 | struct inet_sock *inet = inet_sk(sk); | |
292 | struct sock_exterr_skb *serr; | |
293 | struct iphdr *iph; | |
294 | struct sk_buff *skb; | |
295 | ||
296 | if (!inet->recverr) | |
297 | return; | |
298 | ||
299 | skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC); | |
300 | if (!skb) | |
301 | return; | |
302 | ||
2ca9e6f2 ACM |
303 | skb_put(skb, sizeof(struct iphdr)); |
304 | skb_reset_network_header(skb); | |
eddc9ec5 | 305 | iph = ip_hdr(skb); |
1da177e4 LT |
306 | iph->daddr = daddr; |
307 | ||
e905a9ed | 308 | serr = SKB_EXT_ERR(skb); |
1da177e4 LT |
309 | serr->ee.ee_errno = err; |
310 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; | |
e905a9ed | 311 | serr->ee.ee_type = 0; |
1da177e4 LT |
312 | serr->ee.ee_code = 0; |
313 | serr->ee.ee_pad = 0; | |
314 | serr->ee.ee_info = info; | |
315 | serr->ee.ee_data = 0; | |
d56f90a7 | 316 | serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); |
1da177e4 LT |
317 | serr->port = port; |
318 | ||
27a884dc | 319 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
bd82393c | 320 | skb_reset_transport_header(skb); |
1da177e4 LT |
321 | |
322 | if (sock_queue_err_skb(sk, skb)) | |
323 | kfree_skb(skb); | |
324 | } | |
325 | ||
e905a9ed | 326 | /* |
1da177e4 LT |
327 | * Handle MSG_ERRQUEUE |
328 | */ | |
329 | int ip_recv_error(struct sock *sk, struct msghdr *msg, int len) | |
330 | { | |
331 | struct sock_exterr_skb *serr; | |
332 | struct sk_buff *skb, *skb2; | |
333 | struct sockaddr_in *sin; | |
334 | struct { | |
335 | struct sock_extended_err ee; | |
336 | struct sockaddr_in offender; | |
337 | } errhdr; | |
338 | int err; | |
339 | int copied; | |
340 | ||
341 | err = -EAGAIN; | |
342 | skb = skb_dequeue(&sk->sk_error_queue); | |
343 | if (skb == NULL) | |
344 | goto out; | |
345 | ||
346 | copied = skb->len; | |
347 | if (copied > len) { | |
348 | msg->msg_flags |= MSG_TRUNC; | |
349 | copied = len; | |
350 | } | |
351 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
352 | if (err) | |
353 | goto out_free_skb; | |
354 | ||
355 | sock_recv_timestamp(msg, sk, skb); | |
356 | ||
357 | serr = SKB_EXT_ERR(skb); | |
358 | ||
359 | sin = (struct sockaddr_in *)msg->msg_name; | |
360 | if (sin) { | |
361 | sin->sin_family = AF_INET; | |
d56f90a7 ACM |
362 | sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) + |
363 | serr->addr_offset); | |
1da177e4 LT |
364 | sin->sin_port = serr->port; |
365 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
366 | } | |
367 | ||
368 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); | |
369 | sin = &errhdr.offender; | |
370 | sin->sin_family = AF_UNSPEC; | |
371 | if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { | |
372 | struct inet_sock *inet = inet_sk(sk); | |
373 | ||
374 | sin->sin_family = AF_INET; | |
eddc9ec5 | 375 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
1da177e4 LT |
376 | sin->sin_port = 0; |
377 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
378 | if (inet->cmsg_flags) | |
379 | ip_cmsg_recv(msg, skb); | |
380 | } | |
381 | ||
382 | put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr); | |
383 | ||
384 | /* Now we could try to dump offended packet options */ | |
385 | ||
386 | msg->msg_flags |= MSG_ERRQUEUE; | |
387 | err = copied; | |
388 | ||
389 | /* Reset and regenerate socket error */ | |
e0f9f858 | 390 | spin_lock_bh(&sk->sk_error_queue.lock); |
1da177e4 LT |
391 | sk->sk_err = 0; |
392 | if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) { | |
393 | sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; | |
e0f9f858 | 394 | spin_unlock_bh(&sk->sk_error_queue.lock); |
1da177e4 LT |
395 | sk->sk_error_report(sk); |
396 | } else | |
e0f9f858 | 397 | spin_unlock_bh(&sk->sk_error_queue.lock); |
1da177e4 | 398 | |
e905a9ed | 399 | out_free_skb: |
1da177e4 LT |
400 | kfree_skb(skb); |
401 | out: | |
402 | return err; | |
403 | } | |
404 | ||
405 | ||
406 | /* | |
407 | * Socket option code for IP. This is the end of the line after any TCP,UDP etc options on | |
408 | * an IP socket. | |
409 | */ | |
410 | ||
3fdadf7d | 411 | static int do_ip_setsockopt(struct sock *sk, int level, |
132adf54 | 412 | int optname, char __user *optval, int optlen) |
1da177e4 LT |
413 | { |
414 | struct inet_sock *inet = inet_sk(sk); | |
415 | int val=0,err; | |
416 | ||
e905a9ed | 417 | if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) | |
132adf54 SH |
418 | (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) | |
419 | (1<<IP_RETOPTS) | (1<<IP_TOS) | | |
420 | (1<<IP_TTL) | (1<<IP_HDRINCL) | | |
421 | (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) | | |
422 | (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) | | |
423 | (1<<IP_PASSSEC))) || | |
424 | optname == IP_MULTICAST_TTL || | |
425 | optname == IP_MULTICAST_LOOP) { | |
1da177e4 LT |
426 | if (optlen >= sizeof(int)) { |
427 | if (get_user(val, (int __user *) optval)) | |
428 | return -EFAULT; | |
429 | } else if (optlen >= sizeof(char)) { | |
430 | unsigned char ucval; | |
431 | ||
432 | if (get_user(ucval, (unsigned char __user *) optval)) | |
433 | return -EFAULT; | |
434 | val = (int) ucval; | |
435 | } | |
436 | } | |
437 | ||
438 | /* If optlen==0, it is equivalent to val == 0 */ | |
439 | ||
6a9fb947 | 440 | if (ip_mroute_opt(optname)) |
1da177e4 | 441 | return ip_mroute_setsockopt(sk,optname,optval,optlen); |
1da177e4 LT |
442 | |
443 | err = 0; | |
444 | lock_sock(sk); | |
445 | ||
446 | switch (optname) { | |
132adf54 SH |
447 | case IP_OPTIONS: |
448 | { | |
449 | struct ip_options * opt = NULL; | |
450 | if (optlen > 40 || optlen < 0) | |
451 | goto e_inval; | |
452 | err = ip_options_get_from_user(&opt, optval, optlen); | |
453 | if (err) | |
454 | break; | |
455 | if (inet->is_icsk) { | |
456 | struct inet_connection_sock *icsk = inet_csk(sk); | |
1da177e4 | 457 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
132adf54 SH |
458 | if (sk->sk_family == PF_INET || |
459 | (!((1 << sk->sk_state) & | |
460 | (TCPF_LISTEN | TCPF_CLOSE)) && | |
461 | inet->daddr != LOOPBACK4_IPV6)) { | |
1da177e4 | 462 | #endif |
132adf54 SH |
463 | if (inet->opt) |
464 | icsk->icsk_ext_hdr_len -= inet->opt->optlen; | |
465 | if (opt) | |
466 | icsk->icsk_ext_hdr_len += opt->optlen; | |
467 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
1da177e4 | 468 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1da177e4 | 469 | } |
132adf54 | 470 | #endif |
1da177e4 | 471 | } |
132adf54 SH |
472 | opt = xchg(&inet->opt, opt); |
473 | kfree(opt); | |
474 | break; | |
475 | } | |
476 | case IP_PKTINFO: | |
477 | if (val) | |
478 | inet->cmsg_flags |= IP_CMSG_PKTINFO; | |
479 | else | |
480 | inet->cmsg_flags &= ~IP_CMSG_PKTINFO; | |
481 | break; | |
482 | case IP_RECVTTL: | |
483 | if (val) | |
484 | inet->cmsg_flags |= IP_CMSG_TTL; | |
485 | else | |
486 | inet->cmsg_flags &= ~IP_CMSG_TTL; | |
487 | break; | |
488 | case IP_RECVTOS: | |
489 | if (val) | |
490 | inet->cmsg_flags |= IP_CMSG_TOS; | |
491 | else | |
492 | inet->cmsg_flags &= ~IP_CMSG_TOS; | |
493 | break; | |
494 | case IP_RECVOPTS: | |
495 | if (val) | |
496 | inet->cmsg_flags |= IP_CMSG_RECVOPTS; | |
497 | else | |
498 | inet->cmsg_flags &= ~IP_CMSG_RECVOPTS; | |
499 | break; | |
500 | case IP_RETOPTS: | |
501 | if (val) | |
502 | inet->cmsg_flags |= IP_CMSG_RETOPTS; | |
503 | else | |
504 | inet->cmsg_flags &= ~IP_CMSG_RETOPTS; | |
505 | break; | |
506 | case IP_PASSSEC: | |
507 | if (val) | |
508 | inet->cmsg_flags |= IP_CMSG_PASSSEC; | |
509 | else | |
510 | inet->cmsg_flags &= ~IP_CMSG_PASSSEC; | |
511 | break; | |
512 | case IP_TOS: /* This sets both TOS and Precedence */ | |
513 | if (sk->sk_type == SOCK_STREAM) { | |
514 | val &= ~3; | |
515 | val |= inet->tos & 3; | |
516 | } | |
517 | if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP && | |
518 | !capable(CAP_NET_ADMIN)) { | |
519 | err = -EPERM; | |
1da177e4 | 520 | break; |
132adf54 SH |
521 | } |
522 | if (inet->tos != val) { | |
523 | inet->tos = val; | |
524 | sk->sk_priority = rt_tos2priority(val); | |
525 | sk_dst_reset(sk); | |
526 | } | |
527 | break; | |
528 | case IP_TTL: | |
529 | if (optlen<1) | |
530 | goto e_inval; | |
531 | if (val != -1 && (val < 1 || val>255)) | |
532 | goto e_inval; | |
533 | inet->uc_ttl = val; | |
534 | break; | |
535 | case IP_HDRINCL: | |
536 | if (sk->sk_type != SOCK_RAW) { | |
537 | err = -ENOPROTOOPT; | |
2c7946a7 | 538 | break; |
132adf54 SH |
539 | } |
540 | inet->hdrincl = val ? 1 : 0; | |
541 | break; | |
542 | case IP_MTU_DISCOVER: | |
628a5c56 | 543 | if (val<0 || val>3) |
132adf54 SH |
544 | goto e_inval; |
545 | inet->pmtudisc = val; | |
546 | break; | |
547 | case IP_RECVERR: | |
548 | inet->recverr = !!val; | |
549 | if (!val) | |
550 | skb_queue_purge(&sk->sk_error_queue); | |
551 | break; | |
552 | case IP_MULTICAST_TTL: | |
553 | if (sk->sk_type == SOCK_STREAM) | |
554 | goto e_inval; | |
555 | if (optlen<1) | |
556 | goto e_inval; | |
557 | if (val==-1) | |
558 | val = 1; | |
559 | if (val < 0 || val > 255) | |
560 | goto e_inval; | |
561 | inet->mc_ttl = val; | |
562 | break; | |
563 | case IP_MULTICAST_LOOP: | |
564 | if (optlen<1) | |
565 | goto e_inval; | |
566 | inet->mc_loop = !!val; | |
567 | break; | |
568 | case IP_MULTICAST_IF: | |
569 | { | |
570 | struct ip_mreqn mreq; | |
571 | struct net_device *dev = NULL; | |
572 | ||
573 | if (sk->sk_type == SOCK_STREAM) | |
574 | goto e_inval; | |
575 | /* | |
576 | * Check the arguments are allowable | |
577 | */ | |
578 | ||
579 | err = -EFAULT; | |
580 | if (optlen >= sizeof(struct ip_mreqn)) { | |
581 | if (copy_from_user(&mreq,optval,sizeof(mreq))) | |
1da177e4 | 582 | break; |
132adf54 SH |
583 | } else { |
584 | memset(&mreq, 0, sizeof(mreq)); | |
585 | if (optlen >= sizeof(struct in_addr) && | |
586 | copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr))) | |
587 | break; | |
588 | } | |
589 | ||
590 | if (!mreq.imr_ifindex) { | |
591 | if (mreq.imr_address.s_addr == INADDR_ANY) { | |
592 | inet->mc_index = 0; | |
593 | inet->mc_addr = 0; | |
594 | err = 0; | |
1da177e4 LT |
595 | break; |
596 | } | |
132adf54 SH |
597 | dev = ip_dev_find(mreq.imr_address.s_addr); |
598 | if (dev) { | |
599 | mreq.imr_ifindex = dev->ifindex; | |
600 | dev_put(dev); | |
601 | } | |
602 | } else | |
881d966b | 603 | dev = __dev_get_by_index(&init_net, mreq.imr_ifindex); |
1da177e4 | 604 | |
1da177e4 | 605 | |
132adf54 SH |
606 | err = -EADDRNOTAVAIL; |
607 | if (!dev) | |
608 | break; | |
609 | ||
610 | err = -EINVAL; | |
611 | if (sk->sk_bound_dev_if && | |
612 | mreq.imr_ifindex != sk->sk_bound_dev_if) | |
613 | break; | |
1da177e4 | 614 | |
132adf54 SH |
615 | inet->mc_index = mreq.imr_ifindex; |
616 | inet->mc_addr = mreq.imr_address.s_addr; | |
617 | err = 0; | |
618 | break; | |
619 | } | |
1da177e4 | 620 | |
132adf54 SH |
621 | case IP_ADD_MEMBERSHIP: |
622 | case IP_DROP_MEMBERSHIP: | |
623 | { | |
624 | struct ip_mreqn mreq; | |
1da177e4 | 625 | |
a96fb49b FL |
626 | err = -EPROTO; |
627 | if (inet_sk(sk)->is_icsk) | |
628 | break; | |
629 | ||
132adf54 SH |
630 | if (optlen < sizeof(struct ip_mreq)) |
631 | goto e_inval; | |
632 | err = -EFAULT; | |
633 | if (optlen >= sizeof(struct ip_mreqn)) { | |
634 | if (copy_from_user(&mreq,optval,sizeof(mreq))) | |
1da177e4 | 635 | break; |
132adf54 SH |
636 | } else { |
637 | memset(&mreq, 0, sizeof(mreq)); | |
638 | if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq))) | |
1da177e4 | 639 | break; |
132adf54 | 640 | } |
1da177e4 | 641 | |
132adf54 SH |
642 | if (optname == IP_ADD_MEMBERSHIP) |
643 | err = ip_mc_join_group(sk, &mreq); | |
644 | else | |
645 | err = ip_mc_leave_group(sk, &mreq); | |
646 | break; | |
647 | } | |
648 | case IP_MSFILTER: | |
649 | { | |
650 | extern int sysctl_igmp_max_msf; | |
651 | struct ip_msfilter *msf; | |
652 | ||
653 | if (optlen < IP_MSFILTER_SIZE(0)) | |
654 | goto e_inval; | |
655 | if (optlen > sysctl_optmem_max) { | |
656 | err = -ENOBUFS; | |
1da177e4 LT |
657 | break; |
658 | } | |
132adf54 | 659 | msf = kmalloc(optlen, GFP_KERNEL); |
cfcabdcc | 660 | if (!msf) { |
132adf54 SH |
661 | err = -ENOBUFS; |
662 | break; | |
663 | } | |
664 | err = -EFAULT; | |
665 | if (copy_from_user(msf, optval, optlen)) { | |
666 | kfree(msf); | |
667 | break; | |
668 | } | |
669 | /* numsrc >= (1G-4) overflow in 32 bits */ | |
670 | if (msf->imsf_numsrc >= 0x3ffffffcU || | |
671 | msf->imsf_numsrc > sysctl_igmp_max_msf) { | |
672 | kfree(msf); | |
673 | err = -ENOBUFS; | |
674 | break; | |
675 | } | |
676 | if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) { | |
677 | kfree(msf); | |
678 | err = -EINVAL; | |
679 | break; | |
680 | } | |
681 | err = ip_mc_msfilter(sk, msf, 0); | |
682 | kfree(msf); | |
683 | break; | |
684 | } | |
685 | case IP_BLOCK_SOURCE: | |
686 | case IP_UNBLOCK_SOURCE: | |
687 | case IP_ADD_SOURCE_MEMBERSHIP: | |
688 | case IP_DROP_SOURCE_MEMBERSHIP: | |
689 | { | |
690 | struct ip_mreq_source mreqs; | |
691 | int omode, add; | |
1da177e4 | 692 | |
132adf54 SH |
693 | if (optlen != sizeof(struct ip_mreq_source)) |
694 | goto e_inval; | |
695 | if (copy_from_user(&mreqs, optval, sizeof(mreqs))) { | |
1da177e4 | 696 | err = -EFAULT; |
1da177e4 LT |
697 | break; |
698 | } | |
132adf54 SH |
699 | if (optname == IP_BLOCK_SOURCE) { |
700 | omode = MCAST_EXCLUDE; | |
701 | add = 1; | |
702 | } else if (optname == IP_UNBLOCK_SOURCE) { | |
703 | omode = MCAST_EXCLUDE; | |
704 | add = 0; | |
705 | } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) { | |
706 | struct ip_mreqn mreq; | |
1da177e4 | 707 | |
132adf54 SH |
708 | mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr; |
709 | mreq.imr_address.s_addr = mreqs.imr_interface; | |
710 | mreq.imr_ifindex = 0; | |
711 | err = ip_mc_join_group(sk, &mreq); | |
712 | if (err && err != -EADDRINUSE) | |
1da177e4 | 713 | break; |
132adf54 SH |
714 | omode = MCAST_INCLUDE; |
715 | add = 1; | |
716 | } else /* IP_DROP_SOURCE_MEMBERSHIP */ { | |
717 | omode = MCAST_INCLUDE; | |
718 | add = 0; | |
719 | } | |
720 | err = ip_mc_source(add, omode, sk, &mreqs, 0); | |
721 | break; | |
722 | } | |
723 | case MCAST_JOIN_GROUP: | |
724 | case MCAST_LEAVE_GROUP: | |
725 | { | |
726 | struct group_req greq; | |
727 | struct sockaddr_in *psin; | |
728 | struct ip_mreqn mreq; | |
729 | ||
730 | if (optlen < sizeof(struct group_req)) | |
731 | goto e_inval; | |
732 | err = -EFAULT; | |
733 | if (copy_from_user(&greq, optval, sizeof(greq))) | |
734 | break; | |
735 | psin = (struct sockaddr_in *)&greq.gr_group; | |
736 | if (psin->sin_family != AF_INET) | |
737 | goto e_inval; | |
738 | memset(&mreq, 0, sizeof(mreq)); | |
739 | mreq.imr_multiaddr = psin->sin_addr; | |
740 | mreq.imr_ifindex = greq.gr_interface; | |
741 | ||
742 | if (optname == MCAST_JOIN_GROUP) | |
743 | err = ip_mc_join_group(sk, &mreq); | |
744 | else | |
745 | err = ip_mc_leave_group(sk, &mreq); | |
746 | break; | |
747 | } | |
748 | case MCAST_JOIN_SOURCE_GROUP: | |
749 | case MCAST_LEAVE_SOURCE_GROUP: | |
750 | case MCAST_BLOCK_SOURCE: | |
751 | case MCAST_UNBLOCK_SOURCE: | |
752 | { | |
753 | struct group_source_req greqs; | |
754 | struct ip_mreq_source mreqs; | |
755 | struct sockaddr_in *psin; | |
756 | int omode, add; | |
757 | ||
758 | if (optlen != sizeof(struct group_source_req)) | |
759 | goto e_inval; | |
760 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
1da177e4 | 761 | err = -EFAULT; |
1da177e4 LT |
762 | break; |
763 | } | |
132adf54 SH |
764 | if (greqs.gsr_group.ss_family != AF_INET || |
765 | greqs.gsr_source.ss_family != AF_INET) { | |
766 | err = -EADDRNOTAVAIL; | |
1da177e4 LT |
767 | break; |
768 | } | |
132adf54 SH |
769 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
770 | mreqs.imr_multiaddr = psin->sin_addr.s_addr; | |
771 | psin = (struct sockaddr_in *)&greqs.gsr_source; | |
772 | mreqs.imr_sourceaddr = psin->sin_addr.s_addr; | |
773 | mreqs.imr_interface = 0; /* use index for mc_source */ | |
774 | ||
775 | if (optname == MCAST_BLOCK_SOURCE) { | |
776 | omode = MCAST_EXCLUDE; | |
777 | add = 1; | |
778 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
779 | omode = MCAST_EXCLUDE; | |
780 | add = 0; | |
781 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
1da177e4 LT |
782 | struct ip_mreqn mreq; |
783 | ||
132adf54 | 784 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
1da177e4 | 785 | mreq.imr_multiaddr = psin->sin_addr; |
132adf54 SH |
786 | mreq.imr_address.s_addr = 0; |
787 | mreq.imr_ifindex = greqs.gsr_interface; | |
788 | err = ip_mc_join_group(sk, &mreq); | |
789 | if (err && err != -EADDRINUSE) | |
790 | break; | |
791 | greqs.gsr_interface = mreq.imr_ifindex; | |
792 | omode = MCAST_INCLUDE; | |
793 | add = 1; | |
794 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { | |
795 | omode = MCAST_INCLUDE; | |
796 | add = 0; | |
797 | } | |
798 | err = ip_mc_source(add, omode, sk, &mreqs, | |
799 | greqs.gsr_interface); | |
800 | break; | |
801 | } | |
802 | case MCAST_MSFILTER: | |
803 | { | |
804 | extern int sysctl_igmp_max_msf; | |
805 | struct sockaddr_in *psin; | |
806 | struct ip_msfilter *msf = NULL; | |
807 | struct group_filter *gsf = NULL; | |
808 | int msize, i, ifindex; | |
809 | ||
810 | if (optlen < GROUP_FILTER_SIZE(0)) | |
811 | goto e_inval; | |
812 | if (optlen > sysctl_optmem_max) { | |
813 | err = -ENOBUFS; | |
1da177e4 LT |
814 | break; |
815 | } | |
132adf54 | 816 | gsf = kmalloc(optlen,GFP_KERNEL); |
cfcabdcc | 817 | if (!gsf) { |
132adf54 | 818 | err = -ENOBUFS; |
1da177e4 LT |
819 | break; |
820 | } | |
132adf54 SH |
821 | err = -EFAULT; |
822 | if (copy_from_user(gsf, optval, optlen)) { | |
823 | goto mc_msf_out; | |
824 | } | |
825 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
826 | if (gsf->gf_numsrc >= 0x1ffffff || | |
827 | gsf->gf_numsrc > sysctl_igmp_max_msf) { | |
828 | err = -ENOBUFS; | |
829 | goto mc_msf_out; | |
830 | } | |
831 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
832 | err = -EINVAL; | |
833 | goto mc_msf_out; | |
834 | } | |
835 | msize = IP_MSFILTER_SIZE(gsf->gf_numsrc); | |
836 | msf = kmalloc(msize,GFP_KERNEL); | |
cfcabdcc | 837 | if (!msf) { |
132adf54 SH |
838 | err = -ENOBUFS; |
839 | goto mc_msf_out; | |
840 | } | |
841 | ifindex = gsf->gf_interface; | |
842 | psin = (struct sockaddr_in *)&gsf->gf_group; | |
843 | if (psin->sin_family != AF_INET) { | |
1da177e4 | 844 | err = -EADDRNOTAVAIL; |
132adf54 | 845 | goto mc_msf_out; |
1da177e4 | 846 | } |
132adf54 SH |
847 | msf->imsf_multiaddr = psin->sin_addr.s_addr; |
848 | msf->imsf_interface = 0; | |
849 | msf->imsf_fmode = gsf->gf_fmode; | |
850 | msf->imsf_numsrc = gsf->gf_numsrc; | |
851 | err = -EADDRNOTAVAIL; | |
852 | for (i=0; i<gsf->gf_numsrc; ++i) { | |
853 | psin = (struct sockaddr_in *)&gsf->gf_slist[i]; | |
e905a9ed | 854 | |
132adf54 SH |
855 | if (psin->sin_family != AF_INET) |
856 | goto mc_msf_out; | |
857 | msf->imsf_slist[i] = psin->sin_addr.s_addr; | |
858 | } | |
859 | kfree(gsf); | |
860 | gsf = NULL; | |
861 | ||
862 | err = ip_mc_msfilter(sk, msf, ifindex); | |
863 | mc_msf_out: | |
864 | kfree(msf); | |
865 | kfree(gsf); | |
866 | break; | |
867 | } | |
868 | case IP_ROUTER_ALERT: | |
869 | err = ip_ra_control(sk, val ? 1 : 0, NULL); | |
870 | break; | |
871 | ||
872 | case IP_FREEBIND: | |
873 | if (optlen<1) | |
874 | goto e_inval; | |
875 | inet->freebind = !!val; | |
876 | break; | |
877 | ||
878 | case IP_IPSEC_POLICY: | |
879 | case IP_XFRM_POLICY: | |
880 | err = -EPERM; | |
881 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 | 882 | break; |
132adf54 SH |
883 | err = xfrm_user_policy(sk, optname, optval, optlen); |
884 | break; | |
1da177e4 | 885 | |
132adf54 SH |
886 | default: |
887 | err = -ENOPROTOOPT; | |
888 | break; | |
1da177e4 LT |
889 | } |
890 | release_sock(sk); | |
891 | return err; | |
892 | ||
893 | e_inval: | |
894 | release_sock(sk); | |
895 | return -EINVAL; | |
896 | } | |
897 | ||
3fdadf7d DM |
898 | int ip_setsockopt(struct sock *sk, int level, |
899 | int optname, char __user *optval, int optlen) | |
900 | { | |
901 | int err; | |
902 | ||
903 | if (level != SOL_IP) | |
904 | return -ENOPROTOOPT; | |
905 | ||
906 | err = do_ip_setsockopt(sk, level, optname, optval, optlen); | |
907 | #ifdef CONFIG_NETFILTER | |
908 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
909 | if (err == -ENOPROTOOPT && optname != IP_HDRINCL && | |
6a9fb947 PE |
910 | optname != IP_IPSEC_POLICY && |
911 | optname != IP_XFRM_POLICY && | |
912 | !ip_mroute_opt(optname)) { | |
3fdadf7d DM |
913 | lock_sock(sk); |
914 | err = nf_setsockopt(sk, PF_INET, optname, optval, optlen); | |
915 | release_sock(sk); | |
916 | } | |
917 | #endif | |
918 | return err; | |
919 | } | |
920 | ||
921 | #ifdef CONFIG_COMPAT | |
543d9cfe ACM |
922 | int compat_ip_setsockopt(struct sock *sk, int level, int optname, |
923 | char __user *optval, int optlen) | |
3fdadf7d DM |
924 | { |
925 | int err; | |
926 | ||
927 | if (level != SOL_IP) | |
928 | return -ENOPROTOOPT; | |
929 | ||
930 | err = do_ip_setsockopt(sk, level, optname, optval, optlen); | |
931 | #ifdef CONFIG_NETFILTER | |
932 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
933 | if (err == -ENOPROTOOPT && optname != IP_HDRINCL && | |
6a9fb947 PE |
934 | optname != IP_IPSEC_POLICY && |
935 | optname != IP_XFRM_POLICY && | |
936 | !ip_mroute_opt(optname)) { | |
3fdadf7d | 937 | lock_sock(sk); |
543d9cfe ACM |
938 | err = compat_nf_setsockopt(sk, PF_INET, optname, |
939 | optval, optlen); | |
3fdadf7d DM |
940 | release_sock(sk); |
941 | } | |
942 | #endif | |
943 | return err; | |
944 | } | |
543d9cfe ACM |
945 | |
946 | EXPORT_SYMBOL(compat_ip_setsockopt); | |
3fdadf7d DM |
947 | #endif |
948 | ||
1da177e4 LT |
949 | /* |
950 | * Get the options. Note for future reference. The GET of IP options gets the | |
951 | * _received_ ones. The set sets the _sent_ ones. | |
952 | */ | |
953 | ||
3fdadf7d | 954 | static int do_ip_getsockopt(struct sock *sk, int level, int optname, |
132adf54 | 955 | char __user *optval, int __user *optlen) |
1da177e4 LT |
956 | { |
957 | struct inet_sock *inet = inet_sk(sk); | |
958 | int val; | |
959 | int len; | |
e905a9ed | 960 | |
132adf54 | 961 | if (level != SOL_IP) |
1da177e4 LT |
962 | return -EOPNOTSUPP; |
963 | ||
6a9fb947 | 964 | if (ip_mroute_opt(optname)) |
1da177e4 | 965 | return ip_mroute_getsockopt(sk,optname,optval,optlen); |
1da177e4 | 966 | |
132adf54 | 967 | if (get_user(len,optlen)) |
1da177e4 | 968 | return -EFAULT; |
132adf54 | 969 | if (len < 0) |
1da177e4 | 970 | return -EINVAL; |
e905a9ed | 971 | |
1da177e4 LT |
972 | lock_sock(sk); |
973 | ||
132adf54 SH |
974 | switch (optname) { |
975 | case IP_OPTIONS: | |
976 | { | |
977 | unsigned char optbuf[sizeof(struct ip_options)+40]; | |
978 | struct ip_options * opt = (struct ip_options*)optbuf; | |
979 | opt->optlen = 0; | |
980 | if (inet->opt) | |
981 | memcpy(optbuf, inet->opt, | |
982 | sizeof(struct ip_options)+ | |
983 | inet->opt->optlen); | |
984 | release_sock(sk); | |
985 | ||
986 | if (opt->optlen == 0) | |
987 | return put_user(0, optlen); | |
988 | ||
989 | ip_options_undo(opt); | |
990 | ||
991 | len = min_t(unsigned int, len, opt->optlen); | |
992 | if (put_user(len, optlen)) | |
993 | return -EFAULT; | |
994 | if (copy_to_user(optval, opt->__data, len)) | |
995 | return -EFAULT; | |
996 | return 0; | |
997 | } | |
998 | case IP_PKTINFO: | |
999 | val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0; | |
1000 | break; | |
1001 | case IP_RECVTTL: | |
1002 | val = (inet->cmsg_flags & IP_CMSG_TTL) != 0; | |
1003 | break; | |
1004 | case IP_RECVTOS: | |
1005 | val = (inet->cmsg_flags & IP_CMSG_TOS) != 0; | |
1006 | break; | |
1007 | case IP_RECVOPTS: | |
1008 | val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0; | |
1009 | break; | |
1010 | case IP_RETOPTS: | |
1011 | val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0; | |
1012 | break; | |
1013 | case IP_PASSSEC: | |
1014 | val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0; | |
1015 | break; | |
1016 | case IP_TOS: | |
1017 | val = inet->tos; | |
1018 | break; | |
1019 | case IP_TTL: | |
1020 | val = (inet->uc_ttl == -1 ? | |
1021 | sysctl_ip_default_ttl : | |
1022 | inet->uc_ttl); | |
1023 | break; | |
1024 | case IP_HDRINCL: | |
1025 | val = inet->hdrincl; | |
1026 | break; | |
1027 | case IP_MTU_DISCOVER: | |
1028 | val = inet->pmtudisc; | |
1029 | break; | |
1030 | case IP_MTU: | |
1031 | { | |
1032 | struct dst_entry *dst; | |
1033 | val = 0; | |
1034 | dst = sk_dst_get(sk); | |
1035 | if (dst) { | |
1036 | val = dst_mtu(dst); | |
1037 | dst_release(dst); | |
1da177e4 | 1038 | } |
132adf54 | 1039 | if (!val) { |
1da177e4 | 1040 | release_sock(sk); |
132adf54 | 1041 | return -ENOTCONN; |
1da177e4 | 1042 | } |
132adf54 SH |
1043 | break; |
1044 | } | |
1045 | case IP_RECVERR: | |
1046 | val = inet->recverr; | |
1047 | break; | |
1048 | case IP_MULTICAST_TTL: | |
1049 | val = inet->mc_ttl; | |
1050 | break; | |
1051 | case IP_MULTICAST_LOOP: | |
1052 | val = inet->mc_loop; | |
1053 | break; | |
1054 | case IP_MULTICAST_IF: | |
1055 | { | |
1056 | struct in_addr addr; | |
1057 | len = min_t(unsigned int, len, sizeof(struct in_addr)); | |
1058 | addr.s_addr = inet->mc_addr; | |
1059 | release_sock(sk); | |
1da177e4 | 1060 | |
132adf54 SH |
1061 | if (put_user(len, optlen)) |
1062 | return -EFAULT; | |
1063 | if (copy_to_user(optval, &addr, len)) | |
1064 | return -EFAULT; | |
1065 | return 0; | |
1066 | } | |
1067 | case IP_MSFILTER: | |
1068 | { | |
1069 | struct ip_msfilter msf; | |
1070 | int err; | |
1071 | ||
1072 | if (len < IP_MSFILTER_SIZE(0)) { | |
1da177e4 | 1073 | release_sock(sk); |
132adf54 | 1074 | return -EINVAL; |
1da177e4 | 1075 | } |
132adf54 | 1076 | if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) { |
1da177e4 | 1077 | release_sock(sk); |
132adf54 | 1078 | return -EFAULT; |
1da177e4 | 1079 | } |
132adf54 SH |
1080 | err = ip_mc_msfget(sk, &msf, |
1081 | (struct ip_msfilter __user *)optval, optlen); | |
1082 | release_sock(sk); | |
1083 | return err; | |
1084 | } | |
1085 | case MCAST_MSFILTER: | |
1086 | { | |
1087 | struct group_filter gsf; | |
1088 | int err; | |
1da177e4 | 1089 | |
132adf54 | 1090 | if (len < GROUP_FILTER_SIZE(0)) { |
1da177e4 | 1091 | release_sock(sk); |
132adf54 SH |
1092 | return -EINVAL; |
1093 | } | |
1094 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) { | |
1095 | release_sock(sk); | |
1096 | return -EFAULT; | |
1097 | } | |
1098 | err = ip_mc_gsfget(sk, &gsf, | |
1099 | (struct group_filter __user *)optval, optlen); | |
1100 | release_sock(sk); | |
1101 | return err; | |
1102 | } | |
1103 | case IP_PKTOPTIONS: | |
1104 | { | |
1105 | struct msghdr msg; | |
1da177e4 | 1106 | |
132adf54 | 1107 | release_sock(sk); |
1da177e4 | 1108 | |
132adf54 SH |
1109 | if (sk->sk_type != SOCK_STREAM) |
1110 | return -ENOPROTOOPT; | |
1da177e4 | 1111 | |
132adf54 SH |
1112 | msg.msg_control = optval; |
1113 | msg.msg_controllen = len; | |
1114 | msg.msg_flags = 0; | |
1da177e4 | 1115 | |
132adf54 SH |
1116 | if (inet->cmsg_flags & IP_CMSG_PKTINFO) { |
1117 | struct in_pktinfo info; | |
1118 | ||
1119 | info.ipi_addr.s_addr = inet->rcv_saddr; | |
1120 | info.ipi_spec_dst.s_addr = inet->rcv_saddr; | |
1121 | info.ipi_ifindex = inet->mc_index; | |
1122 | put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); | |
1da177e4 | 1123 | } |
132adf54 SH |
1124 | if (inet->cmsg_flags & IP_CMSG_TTL) { |
1125 | int hlim = inet->mc_ttl; | |
1126 | put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim); | |
1127 | } | |
1128 | len -= msg.msg_controllen; | |
1129 | return put_user(len, optlen); | |
1130 | } | |
1131 | case IP_FREEBIND: | |
1132 | val = inet->freebind; | |
1133 | break; | |
1134 | default: | |
1135 | release_sock(sk); | |
1136 | return -ENOPROTOOPT; | |
1da177e4 LT |
1137 | } |
1138 | release_sock(sk); | |
e905a9ed | 1139 | |
1da177e4 LT |
1140 | if (len < sizeof(int) && len > 0 && val>=0 && val<255) { |
1141 | unsigned char ucval = (unsigned char)val; | |
1142 | len = 1; | |
132adf54 | 1143 | if (put_user(len, optlen)) |
1da177e4 | 1144 | return -EFAULT; |
132adf54 | 1145 | if (copy_to_user(optval,&ucval,1)) |
1da177e4 LT |
1146 | return -EFAULT; |
1147 | } else { | |
1148 | len = min_t(unsigned int, sizeof(int), len); | |
132adf54 | 1149 | if (put_user(len, optlen)) |
1da177e4 | 1150 | return -EFAULT; |
132adf54 | 1151 | if (copy_to_user(optval,&val,len)) |
1da177e4 LT |
1152 | return -EFAULT; |
1153 | } | |
1154 | return 0; | |
1155 | } | |
1156 | ||
3fdadf7d | 1157 | int ip_getsockopt(struct sock *sk, int level, |
132adf54 | 1158 | int optname, char __user *optval, int __user *optlen) |
3fdadf7d DM |
1159 | { |
1160 | int err; | |
1161 | ||
1162 | err = do_ip_getsockopt(sk, level, optname, optval, optlen); | |
1163 | #ifdef CONFIG_NETFILTER | |
1164 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
6a9fb947 PE |
1165 | if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS && |
1166 | !ip_mroute_opt(optname)) { | |
e905a9ed | 1167 | int len; |
3fdadf7d | 1168 | |
132adf54 | 1169 | if (get_user(len,optlen)) |
3fdadf7d DM |
1170 | return -EFAULT; |
1171 | ||
1172 | lock_sock(sk); | |
1173 | err = nf_getsockopt(sk, PF_INET, optname, optval, | |
1174 | &len); | |
1175 | release_sock(sk); | |
1176 | if (err >= 0) | |
1177 | err = put_user(len, optlen); | |
1178 | return err; | |
1179 | } | |
1180 | #endif | |
1181 | return err; | |
1182 | } | |
1183 | ||
1184 | #ifdef CONFIG_COMPAT | |
543d9cfe ACM |
1185 | int compat_ip_getsockopt(struct sock *sk, int level, int optname, |
1186 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1187 | { |
543d9cfe | 1188 | int err = do_ip_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1189 | #ifdef CONFIG_NETFILTER |
1190 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
6a9fb947 PE |
1191 | if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS && |
1192 | !ip_mroute_opt(optname)) { | |
e905a9ed | 1193 | int len; |
3fdadf7d | 1194 | |
543d9cfe | 1195 | if (get_user(len, optlen)) |
3fdadf7d DM |
1196 | return -EFAULT; |
1197 | ||
1198 | lock_sock(sk); | |
543d9cfe | 1199 | err = compat_nf_getsockopt(sk, PF_INET, optname, optval, &len); |
3fdadf7d DM |
1200 | release_sock(sk); |
1201 | if (err >= 0) | |
1202 | err = put_user(len, optlen); | |
1203 | return err; | |
1204 | } | |
1205 | #endif | |
1206 | return err; | |
1207 | } | |
543d9cfe ACM |
1208 | |
1209 | EXPORT_SYMBOL(compat_ip_getsockopt); | |
3fdadf7d DM |
1210 | #endif |
1211 | ||
1da177e4 LT |
1212 | EXPORT_SYMBOL(ip_cmsg_recv); |
1213 | ||
1da177e4 LT |
1214 | EXPORT_SYMBOL(ip_getsockopt); |
1215 | EXPORT_SYMBOL(ip_setsockopt); |