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Merge tag 'v3.10.70' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv4 / ip_sockglue.c
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/inet_ecn.h>
37 #include <net/route.h>
38 #include <net/xfrm.h>
39 #include <net/compat.h>
40 #if IS_ENABLED(CONFIG_IPV6)
41 #include <net/transp_v6.h>
42 #endif
43 #include <net/ip_fib.h>
44
45 #include <linux/errqueue.h>
46 #include <asm/uaccess.h>
47
48 #define IP_CMSG_PKTINFO 1
49 #define IP_CMSG_TTL 2
50 #define IP_CMSG_TOS 4
51 #define IP_CMSG_RECVOPTS 8
52 #define IP_CMSG_RETOPTS 16
53 #define IP_CMSG_PASSSEC 32
54 #define IP_CMSG_ORIGDSTADDR 64
55
56 /*
57 * SOL_IP control messages.
58 */
59 #define PKTINFO_SKB_CB(__skb) ((struct in_pktinfo *)((__skb)->cb))
60
61 static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
62 {
63 struct in_pktinfo info = *PKTINFO_SKB_CB(skb);
64
65 info.ipi_addr.s_addr = ip_hdr(skb)->daddr;
66
67 put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
68 }
69
70 static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
71 {
72 int ttl = ip_hdr(skb)->ttl;
73 put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
74 }
75
76 static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
77 {
78 put_cmsg(msg, SOL_IP, IP_TOS, 1, &ip_hdr(skb)->tos);
79 }
80
81 static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
82 {
83 if (IPCB(skb)->opt.optlen == 0)
84 return;
85
86 put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen,
87 ip_hdr(skb) + 1);
88 }
89
90
91 static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
92 {
93 unsigned char optbuf[sizeof(struct ip_options) + 40];
94 struct ip_options *opt = (struct ip_options *)optbuf;
95
96 if (IPCB(skb)->opt.optlen == 0)
97 return;
98
99 if (ip_options_echo(opt, skb)) {
100 msg->msg_flags |= MSG_CTRUNC;
101 return;
102 }
103 ip_options_undo(opt);
104
105 put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
106 }
107
108 static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
109 {
110 char *secdata;
111 u32 seclen, secid;
112 int err;
113
114 err = security_socket_getpeersec_dgram(NULL, skb, &secid);
115 if (err)
116 return;
117
118 err = security_secid_to_secctx(secid, &secdata, &seclen);
119 if (err)
120 return;
121
122 put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata);
123 security_release_secctx(secdata, seclen);
124 }
125
126 static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
127 {
128 struct sockaddr_in sin;
129 const struct iphdr *iph = ip_hdr(skb);
130 __be16 *ports = (__be16 *)skb_transport_header(skb);
131
132 if (skb_transport_offset(skb) + 4 > skb->len)
133 return;
134
135 /* All current transport protocols have the port numbers in the
136 * first four bytes of the transport header and this function is
137 * written with this assumption in mind.
138 */
139
140 sin.sin_family = AF_INET;
141 sin.sin_addr.s_addr = iph->daddr;
142 sin.sin_port = ports[1];
143 memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
144
145 put_cmsg(msg, SOL_IP, IP_ORIGDSTADDR, sizeof(sin), &sin);
146 }
147
148 void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
149 {
150 struct inet_sock *inet = inet_sk(skb->sk);
151 unsigned int flags = inet->cmsg_flags;
152
153 /* Ordered by supposed usage frequency */
154 if (flags & 1)
155 ip_cmsg_recv_pktinfo(msg, skb);
156 if ((flags >>= 1) == 0)
157 return;
158
159 if (flags & 1)
160 ip_cmsg_recv_ttl(msg, skb);
161 if ((flags >>= 1) == 0)
162 return;
163
164 if (flags & 1)
165 ip_cmsg_recv_tos(msg, skb);
166 if ((flags >>= 1) == 0)
167 return;
168
169 if (flags & 1)
170 ip_cmsg_recv_opts(msg, skb);
171 if ((flags >>= 1) == 0)
172 return;
173
174 if (flags & 1)
175 ip_cmsg_recv_retopts(msg, skb);
176 if ((flags >>= 1) == 0)
177 return;
178
179 if (flags & 1)
180 ip_cmsg_recv_security(msg, skb);
181
182 if ((flags >>= 1) == 0)
183 return;
184 if (flags & 1)
185 ip_cmsg_recv_dstaddr(msg, skb);
186
187 }
188 EXPORT_SYMBOL(ip_cmsg_recv);
189
190 int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc)
191 {
192 int err;
193 struct cmsghdr *cmsg;
194
195 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
196 if (!CMSG_OK(msg, cmsg))
197 return -EINVAL;
198 if (cmsg->cmsg_level != SOL_IP)
199 continue;
200 switch (cmsg->cmsg_type) {
201 case IP_RETOPTS:
202 err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
203 err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg),
204 err < 40 ? err : 40);
205 if (err)
206 return err;
207 break;
208 case IP_PKTINFO:
209 {
210 struct in_pktinfo *info;
211 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
212 return -EINVAL;
213 info = (struct in_pktinfo *)CMSG_DATA(cmsg);
214 ipc->oif = info->ipi_ifindex;
215 ipc->addr = info->ipi_spec_dst.s_addr;
216 break;
217 }
218 default:
219 return -EINVAL;
220 }
221 }
222 return 0;
223 }
224
225
226 /* Special input handler for packets caught by router alert option.
227 They are selected only by protocol field, and then processed likely
228 local ones; but only if someone wants them! Otherwise, router
229 not running rsvpd will kill RSVP.
230
231 It is user level problem, what it will make with them.
232 I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
233 but receiver should be enough clever f.e. to forward mtrace requests,
234 sent to multicast group to reach destination designated router.
235 */
236 struct ip_ra_chain __rcu *ip_ra_chain;
237 static DEFINE_SPINLOCK(ip_ra_lock);
238
239
240 static void ip_ra_destroy_rcu(struct rcu_head *head)
241 {
242 struct ip_ra_chain *ra = container_of(head, struct ip_ra_chain, rcu);
243
244 sock_put(ra->saved_sk);
245 kfree(ra);
246 }
247
248 int ip_ra_control(struct sock *sk, unsigned char on,
249 void (*destructor)(struct sock *))
250 {
251 struct ip_ra_chain *ra, *new_ra;
252 struct ip_ra_chain __rcu **rap;
253
254 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num == IPPROTO_RAW)
255 return -EINVAL;
256
257 new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
258
259 spin_lock_bh(&ip_ra_lock);
260 for (rap = &ip_ra_chain;
261 (ra = rcu_dereference_protected(*rap,
262 lockdep_is_held(&ip_ra_lock))) != NULL;
263 rap = &ra->next) {
264 if (ra->sk == sk) {
265 if (on) {
266 spin_unlock_bh(&ip_ra_lock);
267 kfree(new_ra);
268 return -EADDRINUSE;
269 }
270 /* dont let ip_call_ra_chain() use sk again */
271 ra->sk = NULL;
272 rcu_assign_pointer(*rap, ra->next);
273 spin_unlock_bh(&ip_ra_lock);
274
275 if (ra->destructor)
276 ra->destructor(sk);
277 /*
278 * Delay sock_put(sk) and kfree(ra) after one rcu grace
279 * period. This guarantee ip_call_ra_chain() dont need
280 * to mess with socket refcounts.
281 */
282 ra->saved_sk = sk;
283 call_rcu(&ra->rcu, ip_ra_destroy_rcu);
284 return 0;
285 }
286 }
287 if (new_ra == NULL) {
288 spin_unlock_bh(&ip_ra_lock);
289 return -ENOBUFS;
290 }
291 new_ra->sk = sk;
292 new_ra->destructor = destructor;
293
294 new_ra->next = ra;
295 rcu_assign_pointer(*rap, new_ra);
296 sock_hold(sk);
297 spin_unlock_bh(&ip_ra_lock);
298
299 return 0;
300 }
301
302 void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
303 __be16 port, u32 info, u8 *payload)
304 {
305 struct sock_exterr_skb *serr;
306
307 skb = skb_clone(skb, GFP_ATOMIC);
308 if (!skb)
309 return;
310
311 serr = SKB_EXT_ERR(skb);
312 serr->ee.ee_errno = err;
313 serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
314 serr->ee.ee_type = icmp_hdr(skb)->type;
315 serr->ee.ee_code = icmp_hdr(skb)->code;
316 serr->ee.ee_pad = 0;
317 serr->ee.ee_info = info;
318 serr->ee.ee_data = 0;
319 serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) -
320 skb_network_header(skb);
321 serr->port = port;
322
323 if (skb_pull(skb, payload - skb->data) != NULL) {
324 skb_reset_transport_header(skb);
325 if (sock_queue_err_skb(sk, skb) == 0)
326 return;
327 }
328 kfree_skb(skb);
329 }
330
331 void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info)
332 {
333 struct inet_sock *inet = inet_sk(sk);
334 struct sock_exterr_skb *serr;
335 struct iphdr *iph;
336 struct sk_buff *skb;
337
338 if (!inet->recverr)
339 return;
340
341 skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
342 if (!skb)
343 return;
344
345 skb_put(skb, sizeof(struct iphdr));
346 skb_reset_network_header(skb);
347 iph = ip_hdr(skb);
348 iph->daddr = daddr;
349
350 serr = SKB_EXT_ERR(skb);
351 serr->ee.ee_errno = err;
352 serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
353 serr->ee.ee_type = 0;
354 serr->ee.ee_code = 0;
355 serr->ee.ee_pad = 0;
356 serr->ee.ee_info = info;
357 serr->ee.ee_data = 0;
358 serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb);
359 serr->port = port;
360
361 __skb_pull(skb, skb_tail_pointer(skb) - skb->data);
362 skb_reset_transport_header(skb);
363
364 if (sock_queue_err_skb(sk, skb))
365 kfree_skb(skb);
366 }
367
368 /*
369 * Handle MSG_ERRQUEUE
370 */
371 int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
372 {
373 struct sock_exterr_skb *serr;
374 struct sk_buff *skb, *skb2;
375 struct sockaddr_in *sin;
376 struct {
377 struct sock_extended_err ee;
378 struct sockaddr_in offender;
379 } errhdr;
380 int err;
381 int copied;
382
383 err = -EAGAIN;
384 skb = skb_dequeue(&sk->sk_error_queue);
385 if (skb == NULL)
386 goto out;
387
388 copied = skb->len;
389 if (copied > len) {
390 msg->msg_flags |= MSG_TRUNC;
391 copied = len;
392 }
393 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
394 if (err)
395 goto out_free_skb;
396
397 sock_recv_timestamp(msg, sk, skb);
398
399 serr = SKB_EXT_ERR(skb);
400
401 sin = (struct sockaddr_in *)msg->msg_name;
402 if (sin) {
403 sin->sin_family = AF_INET;
404 sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) +
405 serr->addr_offset);
406 sin->sin_port = serr->port;
407 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
408 *addr_len = sizeof(*sin);
409 }
410
411 memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
412 sin = &errhdr.offender;
413 memset(sin, 0, sizeof(*sin));
414 if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
415 sin->sin_family = AF_INET;
416 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
417 if (inet_sk(sk)->cmsg_flags)
418 ip_cmsg_recv(msg, skb);
419 }
420
421 put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
422
423 /* Now we could try to dump offended packet options */
424
425 msg->msg_flags |= MSG_ERRQUEUE;
426 err = copied;
427
428 /* Reset and regenerate socket error */
429 spin_lock_bh(&sk->sk_error_queue.lock);
430 sk->sk_err = 0;
431 skb2 = skb_peek(&sk->sk_error_queue);
432 if (skb2 != NULL) {
433 sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
434 spin_unlock_bh(&sk->sk_error_queue.lock);
435 sk->sk_error_report(sk);
436 } else
437 spin_unlock_bh(&sk->sk_error_queue.lock);
438
439 out_free_skb:
440 kfree_skb(skb);
441 out:
442 return err;
443 }
444
445
446 /*
447 * Socket option code for IP. This is the end of the line after any
448 * TCP,UDP etc options on an IP socket.
449 */
450
451 static int do_ip_setsockopt(struct sock *sk, int level,
452 int optname, char __user *optval, unsigned int optlen)
453 {
454 struct inet_sock *inet = inet_sk(sk);
455 int val = 0, err;
456
457 switch (optname) {
458 case IP_PKTINFO:
459 case IP_RECVTTL:
460 case IP_RECVOPTS:
461 case IP_RECVTOS:
462 case IP_RETOPTS:
463 case IP_TOS:
464 case IP_TTL:
465 case IP_HDRINCL:
466 case IP_MTU_DISCOVER:
467 case IP_RECVERR:
468 case IP_ROUTER_ALERT:
469 case IP_FREEBIND:
470 case IP_PASSSEC:
471 case IP_TRANSPARENT:
472 case IP_MINTTL:
473 case IP_NODEFRAG:
474 case IP_UNICAST_IF:
475 case IP_MULTICAST_TTL:
476 case IP_MULTICAST_ALL:
477 case IP_MULTICAST_LOOP:
478 case IP_RECVORIGDSTADDR:
479 if (optlen >= sizeof(int)) {
480 if (get_user(val, (int __user *) optval))
481 return -EFAULT;
482 } else if (optlen >= sizeof(char)) {
483 unsigned char ucval;
484
485 if (get_user(ucval, (unsigned char __user *) optval))
486 return -EFAULT;
487 val = (int) ucval;
488 }
489 }
490
491 /* If optlen==0, it is equivalent to val == 0 */
492
493 if (ip_mroute_opt(optname))
494 return ip_mroute_setsockopt(sk, optname, optval, optlen);
495
496 err = 0;
497 lock_sock(sk);
498
499 switch (optname) {
500 case IP_OPTIONS:
501 {
502 struct ip_options_rcu *old, *opt = NULL;
503
504 if (optlen > 40)
505 goto e_inval;
506 err = ip_options_get_from_user(sock_net(sk), &opt,
507 optval, optlen);
508 if (err)
509 break;
510 old = rcu_dereference_protected(inet->inet_opt,
511 sock_owned_by_user(sk));
512 if (inet->is_icsk) {
513 struct inet_connection_sock *icsk = inet_csk(sk);
514 #if IS_ENABLED(CONFIG_IPV6)
515 if (sk->sk_family == PF_INET ||
516 (!((1 << sk->sk_state) &
517 (TCPF_LISTEN | TCPF_CLOSE)) &&
518 inet->inet_daddr != LOOPBACK4_IPV6)) {
519 #endif
520 if (old)
521 icsk->icsk_ext_hdr_len -= old->opt.optlen;
522 if (opt)
523 icsk->icsk_ext_hdr_len += opt->opt.optlen;
524 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
525 #if IS_ENABLED(CONFIG_IPV6)
526 }
527 #endif
528 }
529 rcu_assign_pointer(inet->inet_opt, opt);
530 if (old)
531 kfree_rcu(old, rcu);
532 break;
533 }
534 case IP_PKTINFO:
535 if (val)
536 inet->cmsg_flags |= IP_CMSG_PKTINFO;
537 else
538 inet->cmsg_flags &= ~IP_CMSG_PKTINFO;
539 break;
540 case IP_RECVTTL:
541 if (val)
542 inet->cmsg_flags |= IP_CMSG_TTL;
543 else
544 inet->cmsg_flags &= ~IP_CMSG_TTL;
545 break;
546 case IP_RECVTOS:
547 if (val)
548 inet->cmsg_flags |= IP_CMSG_TOS;
549 else
550 inet->cmsg_flags &= ~IP_CMSG_TOS;
551 break;
552 case IP_RECVOPTS:
553 if (val)
554 inet->cmsg_flags |= IP_CMSG_RECVOPTS;
555 else
556 inet->cmsg_flags &= ~IP_CMSG_RECVOPTS;
557 break;
558 case IP_RETOPTS:
559 if (val)
560 inet->cmsg_flags |= IP_CMSG_RETOPTS;
561 else
562 inet->cmsg_flags &= ~IP_CMSG_RETOPTS;
563 break;
564 case IP_PASSSEC:
565 if (val)
566 inet->cmsg_flags |= IP_CMSG_PASSSEC;
567 else
568 inet->cmsg_flags &= ~IP_CMSG_PASSSEC;
569 break;
570 case IP_RECVORIGDSTADDR:
571 if (val)
572 inet->cmsg_flags |= IP_CMSG_ORIGDSTADDR;
573 else
574 inet->cmsg_flags &= ~IP_CMSG_ORIGDSTADDR;
575 break;
576 case IP_TOS: /* This sets both TOS and Precedence */
577 if (sk->sk_type == SOCK_STREAM) {
578 val &= ~INET_ECN_MASK;
579 val |= inet->tos & INET_ECN_MASK;
580 }
581 if (inet->tos != val) {
582 inet->tos = val;
583 sk->sk_priority = rt_tos2priority(val);
584 sk_dst_reset(sk);
585 }
586 break;
587 case IP_TTL:
588 if (optlen < 1)
589 goto e_inval;
590 if (val != -1 && (val < 1 || val > 255))
591 goto e_inval;
592 inet->uc_ttl = val;
593 break;
594 case IP_HDRINCL:
595 if (sk->sk_type != SOCK_RAW) {
596 err = -ENOPROTOOPT;
597 break;
598 }
599 inet->hdrincl = val ? 1 : 0;
600 break;
601 case IP_NODEFRAG:
602 if (sk->sk_type != SOCK_RAW) {
603 err = -ENOPROTOOPT;
604 break;
605 }
606 inet->nodefrag = val ? 1 : 0;
607 break;
608 case IP_MTU_DISCOVER:
609 if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE)
610 goto e_inval;
611 inet->pmtudisc = val;
612 break;
613 case IP_RECVERR:
614 inet->recverr = !!val;
615 if (!val)
616 skb_queue_purge(&sk->sk_error_queue);
617 break;
618 case IP_MULTICAST_TTL:
619 if (sk->sk_type == SOCK_STREAM)
620 goto e_inval;
621 if (optlen < 1)
622 goto e_inval;
623 if (val == -1)
624 val = 1;
625 if (val < 0 || val > 255)
626 goto e_inval;
627 inet->mc_ttl = val;
628 break;
629 case IP_MULTICAST_LOOP:
630 if (optlen < 1)
631 goto e_inval;
632 inet->mc_loop = !!val;
633 break;
634 case IP_UNICAST_IF:
635 {
636 struct net_device *dev = NULL;
637 int ifindex;
638
639 if (optlen != sizeof(int))
640 goto e_inval;
641
642 ifindex = (__force int)ntohl((__force __be32)val);
643 if (ifindex == 0) {
644 inet->uc_index = 0;
645 err = 0;
646 break;
647 }
648
649 dev = dev_get_by_index(sock_net(sk), ifindex);
650 err = -EADDRNOTAVAIL;
651 if (!dev)
652 break;
653 dev_put(dev);
654
655 err = -EINVAL;
656 if (sk->sk_bound_dev_if)
657 break;
658
659 inet->uc_index = ifindex;
660 err = 0;
661 break;
662 }
663 case IP_MULTICAST_IF:
664 {
665 struct ip_mreqn mreq;
666 struct net_device *dev = NULL;
667
668 if (sk->sk_type == SOCK_STREAM)
669 goto e_inval;
670 /*
671 * Check the arguments are allowable
672 */
673
674 if (optlen < sizeof(struct in_addr))
675 goto e_inval;
676
677 err = -EFAULT;
678 if (optlen >= sizeof(struct ip_mreqn)) {
679 if (copy_from_user(&mreq, optval, sizeof(mreq)))
680 break;
681 } else {
682 memset(&mreq, 0, sizeof(mreq));
683 if (optlen >= sizeof(struct ip_mreq)) {
684 if (copy_from_user(&mreq, optval,
685 sizeof(struct ip_mreq)))
686 break;
687 } else if (optlen >= sizeof(struct in_addr)) {
688 if (copy_from_user(&mreq.imr_address, optval,
689 sizeof(struct in_addr)))
690 break;
691 }
692 }
693
694 if (!mreq.imr_ifindex) {
695 if (mreq.imr_address.s_addr == htonl(INADDR_ANY)) {
696 inet->mc_index = 0;
697 inet->mc_addr = 0;
698 err = 0;
699 break;
700 }
701 dev = ip_dev_find(sock_net(sk), mreq.imr_address.s_addr);
702 if (dev)
703 mreq.imr_ifindex = dev->ifindex;
704 } else
705 dev = dev_get_by_index(sock_net(sk), mreq.imr_ifindex);
706
707
708 err = -EADDRNOTAVAIL;
709 if (!dev)
710 break;
711 dev_put(dev);
712
713 err = -EINVAL;
714 if (sk->sk_bound_dev_if &&
715 mreq.imr_ifindex != sk->sk_bound_dev_if)
716 break;
717
718 inet->mc_index = mreq.imr_ifindex;
719 inet->mc_addr = mreq.imr_address.s_addr;
720 err = 0;
721 break;
722 }
723
724 case IP_ADD_MEMBERSHIP:
725 case IP_DROP_MEMBERSHIP:
726 {
727 struct ip_mreqn mreq;
728
729 err = -EPROTO;
730 if (inet_sk(sk)->is_icsk)
731 break;
732
733 if (optlen < sizeof(struct ip_mreq))
734 goto e_inval;
735 err = -EFAULT;
736 if (optlen >= sizeof(struct ip_mreqn)) {
737 if (copy_from_user(&mreq, optval, sizeof(mreq)))
738 break;
739 } else {
740 memset(&mreq, 0, sizeof(mreq));
741 if (copy_from_user(&mreq, optval, sizeof(struct ip_mreq)))
742 break;
743 }
744
745 if (optname == IP_ADD_MEMBERSHIP)
746 err = ip_mc_join_group(sk, &mreq);
747 else
748 err = ip_mc_leave_group(sk, &mreq);
749 break;
750 }
751 case IP_MSFILTER:
752 {
753 struct ip_msfilter *msf;
754
755 if (optlen < IP_MSFILTER_SIZE(0))
756 goto e_inval;
757 if (optlen > sysctl_optmem_max) {
758 err = -ENOBUFS;
759 break;
760 }
761 msf = kmalloc(optlen, GFP_KERNEL);
762 if (!msf) {
763 err = -ENOBUFS;
764 break;
765 }
766 err = -EFAULT;
767 if (copy_from_user(msf, optval, optlen)) {
768 kfree(msf);
769 break;
770 }
771 /* numsrc >= (1G-4) overflow in 32 bits */
772 if (msf->imsf_numsrc >= 0x3ffffffcU ||
773 msf->imsf_numsrc > sysctl_igmp_max_msf) {
774 kfree(msf);
775 err = -ENOBUFS;
776 break;
777 }
778 if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
779 kfree(msf);
780 err = -EINVAL;
781 break;
782 }
783 err = ip_mc_msfilter(sk, msf, 0);
784 kfree(msf);
785 break;
786 }
787 case IP_BLOCK_SOURCE:
788 case IP_UNBLOCK_SOURCE:
789 case IP_ADD_SOURCE_MEMBERSHIP:
790 case IP_DROP_SOURCE_MEMBERSHIP:
791 {
792 struct ip_mreq_source mreqs;
793 int omode, add;
794
795 if (optlen != sizeof(struct ip_mreq_source))
796 goto e_inval;
797 if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
798 err = -EFAULT;
799 break;
800 }
801 if (optname == IP_BLOCK_SOURCE) {
802 omode = MCAST_EXCLUDE;
803 add = 1;
804 } else if (optname == IP_UNBLOCK_SOURCE) {
805 omode = MCAST_EXCLUDE;
806 add = 0;
807 } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
808 struct ip_mreqn mreq;
809
810 mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
811 mreq.imr_address.s_addr = mreqs.imr_interface;
812 mreq.imr_ifindex = 0;
813 err = ip_mc_join_group(sk, &mreq);
814 if (err && err != -EADDRINUSE)
815 break;
816 omode = MCAST_INCLUDE;
817 add = 1;
818 } else /* IP_DROP_SOURCE_MEMBERSHIP */ {
819 omode = MCAST_INCLUDE;
820 add = 0;
821 }
822 err = ip_mc_source(add, omode, sk, &mreqs, 0);
823 break;
824 }
825 case MCAST_JOIN_GROUP:
826 case MCAST_LEAVE_GROUP:
827 {
828 struct group_req greq;
829 struct sockaddr_in *psin;
830 struct ip_mreqn mreq;
831
832 if (optlen < sizeof(struct group_req))
833 goto e_inval;
834 err = -EFAULT;
835 if (copy_from_user(&greq, optval, sizeof(greq)))
836 break;
837 psin = (struct sockaddr_in *)&greq.gr_group;
838 if (psin->sin_family != AF_INET)
839 goto e_inval;
840 memset(&mreq, 0, sizeof(mreq));
841 mreq.imr_multiaddr = psin->sin_addr;
842 mreq.imr_ifindex = greq.gr_interface;
843
844 if (optname == MCAST_JOIN_GROUP)
845 err = ip_mc_join_group(sk, &mreq);
846 else
847 err = ip_mc_leave_group(sk, &mreq);
848 break;
849 }
850 case MCAST_JOIN_SOURCE_GROUP:
851 case MCAST_LEAVE_SOURCE_GROUP:
852 case MCAST_BLOCK_SOURCE:
853 case MCAST_UNBLOCK_SOURCE:
854 {
855 struct group_source_req greqs;
856 struct ip_mreq_source mreqs;
857 struct sockaddr_in *psin;
858 int omode, add;
859
860 if (optlen != sizeof(struct group_source_req))
861 goto e_inval;
862 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
863 err = -EFAULT;
864 break;
865 }
866 if (greqs.gsr_group.ss_family != AF_INET ||
867 greqs.gsr_source.ss_family != AF_INET) {
868 err = -EADDRNOTAVAIL;
869 break;
870 }
871 psin = (struct sockaddr_in *)&greqs.gsr_group;
872 mreqs.imr_multiaddr = psin->sin_addr.s_addr;
873 psin = (struct sockaddr_in *)&greqs.gsr_source;
874 mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
875 mreqs.imr_interface = 0; /* use index for mc_source */
876
877 if (optname == MCAST_BLOCK_SOURCE) {
878 omode = MCAST_EXCLUDE;
879 add = 1;
880 } else if (optname == MCAST_UNBLOCK_SOURCE) {
881 omode = MCAST_EXCLUDE;
882 add = 0;
883 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
884 struct ip_mreqn mreq;
885
886 psin = (struct sockaddr_in *)&greqs.gsr_group;
887 mreq.imr_multiaddr = psin->sin_addr;
888 mreq.imr_address.s_addr = 0;
889 mreq.imr_ifindex = greqs.gsr_interface;
890 err = ip_mc_join_group(sk, &mreq);
891 if (err && err != -EADDRINUSE)
892 break;
893 greqs.gsr_interface = mreq.imr_ifindex;
894 omode = MCAST_INCLUDE;
895 add = 1;
896 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
897 omode = MCAST_INCLUDE;
898 add = 0;
899 }
900 err = ip_mc_source(add, omode, sk, &mreqs,
901 greqs.gsr_interface);
902 break;
903 }
904 case MCAST_MSFILTER:
905 {
906 struct sockaddr_in *psin;
907 struct ip_msfilter *msf = NULL;
908 struct group_filter *gsf = NULL;
909 int msize, i, ifindex;
910
911 if (optlen < GROUP_FILTER_SIZE(0))
912 goto e_inval;
913 if (optlen > sysctl_optmem_max) {
914 err = -ENOBUFS;
915 break;
916 }
917 gsf = kmalloc(optlen, GFP_KERNEL);
918 if (!gsf) {
919 err = -ENOBUFS;
920 break;
921 }
922 err = -EFAULT;
923 if (copy_from_user(gsf, optval, optlen))
924 goto mc_msf_out;
925
926 /* numsrc >= (4G-140)/128 overflow in 32 bits */
927 if (gsf->gf_numsrc >= 0x1ffffff ||
928 gsf->gf_numsrc > sysctl_igmp_max_msf) {
929 err = -ENOBUFS;
930 goto mc_msf_out;
931 }
932 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
933 err = -EINVAL;
934 goto mc_msf_out;
935 }
936 msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
937 msf = kmalloc(msize, GFP_KERNEL);
938 if (!msf) {
939 err = -ENOBUFS;
940 goto mc_msf_out;
941 }
942 ifindex = gsf->gf_interface;
943 psin = (struct sockaddr_in *)&gsf->gf_group;
944 if (psin->sin_family != AF_INET) {
945 err = -EADDRNOTAVAIL;
946 goto mc_msf_out;
947 }
948 msf->imsf_multiaddr = psin->sin_addr.s_addr;
949 msf->imsf_interface = 0;
950 msf->imsf_fmode = gsf->gf_fmode;
951 msf->imsf_numsrc = gsf->gf_numsrc;
952 err = -EADDRNOTAVAIL;
953 for (i = 0; i < gsf->gf_numsrc; ++i) {
954 psin = (struct sockaddr_in *)&gsf->gf_slist[i];
955
956 if (psin->sin_family != AF_INET)
957 goto mc_msf_out;
958 msf->imsf_slist[i] = psin->sin_addr.s_addr;
959 }
960 kfree(gsf);
961 gsf = NULL;
962
963 err = ip_mc_msfilter(sk, msf, ifindex);
964 mc_msf_out:
965 kfree(msf);
966 kfree(gsf);
967 break;
968 }
969 case IP_MULTICAST_ALL:
970 if (optlen < 1)
971 goto e_inval;
972 if (val != 0 && val != 1)
973 goto e_inval;
974 inet->mc_all = val;
975 break;
976 case IP_ROUTER_ALERT:
977 err = ip_ra_control(sk, val ? 1 : 0, NULL);
978 break;
979
980 case IP_FREEBIND:
981 if (optlen < 1)
982 goto e_inval;
983 inet->freebind = !!val;
984 break;
985
986 case IP_IPSEC_POLICY:
987 case IP_XFRM_POLICY:
988 err = -EPERM;
989 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
990 break;
991 err = xfrm_user_policy(sk, optname, optval, optlen);
992 break;
993
994 case IP_TRANSPARENT:
995 if (!!val && !ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
996 !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
997 err = -EPERM;
998 break;
999 }
1000 if (optlen < 1)
1001 goto e_inval;
1002 inet->transparent = !!val;
1003 break;
1004
1005 case IP_MINTTL:
1006 if (optlen < 1)
1007 goto e_inval;
1008 if (val < 0 || val > 255)
1009 goto e_inval;
1010 inet->min_ttl = val;
1011 break;
1012
1013 default:
1014 err = -ENOPROTOOPT;
1015 break;
1016 }
1017 release_sock(sk);
1018 return err;
1019
1020 e_inval:
1021 release_sock(sk);
1022 return -EINVAL;
1023 }
1024
1025 /**
1026 * ipv4_pktinfo_prepare - transfert some info from rtable to skb
1027 * @sk: socket
1028 * @skb: buffer
1029 *
1030 * To support IP_CMSG_PKTINFO option, we store rt_iif and specific
1031 * destination in skb->cb[] before dst drop.
1032 * This way, receiver doesnt make cache line misses to read rtable.
1033 */
1034 void ipv4_pktinfo_prepare(struct sk_buff *skb)
1035 {
1036 struct in_pktinfo *pktinfo = PKTINFO_SKB_CB(skb);
1037
1038 if (skb_rtable(skb)) {
1039 pktinfo->ipi_ifindex = inet_iif(skb);
1040 pktinfo->ipi_spec_dst.s_addr = fib_compute_spec_dst(skb);
1041 } else {
1042 pktinfo->ipi_ifindex = 0;
1043 pktinfo->ipi_spec_dst.s_addr = 0;
1044 }
1045 /* We need to keep the dst for __ip_options_echo()
1046 * We could restrict the test to opt.ts_needtime || opt.srr,
1047 * but the following is good enough as IP options are not often used.
1048 */
1049 if (unlikely(IPCB(skb)->opt.optlen))
1050 skb_dst_force(skb);
1051 else
1052 skb_dst_drop(skb);
1053 }
1054
1055 int ip_setsockopt(struct sock *sk, int level,
1056 int optname, char __user *optval, unsigned int optlen)
1057 {
1058 int err;
1059
1060 if (level != SOL_IP)
1061 return -ENOPROTOOPT;
1062
1063 err = do_ip_setsockopt(sk, level, optname, optval, optlen);
1064 #ifdef CONFIG_NETFILTER
1065 /* we need to exclude all possible ENOPROTOOPTs except default case */
1066 if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
1067 optname != IP_IPSEC_POLICY &&
1068 optname != IP_XFRM_POLICY &&
1069 !ip_mroute_opt(optname)) {
1070 lock_sock(sk);
1071 err = nf_setsockopt(sk, PF_INET, optname, optval, optlen);
1072 release_sock(sk);
1073 }
1074 #endif
1075 return err;
1076 }
1077 EXPORT_SYMBOL(ip_setsockopt);
1078
1079 #ifdef CONFIG_COMPAT
1080 int compat_ip_setsockopt(struct sock *sk, int level, int optname,
1081 char __user *optval, unsigned int optlen)
1082 {
1083 int err;
1084
1085 if (level != SOL_IP)
1086 return -ENOPROTOOPT;
1087
1088 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
1089 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
1090 ip_setsockopt);
1091
1092 err = do_ip_setsockopt(sk, level, optname, optval, optlen);
1093 #ifdef CONFIG_NETFILTER
1094 /* we need to exclude all possible ENOPROTOOPTs except default case */
1095 if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
1096 optname != IP_IPSEC_POLICY &&
1097 optname != IP_XFRM_POLICY &&
1098 !ip_mroute_opt(optname)) {
1099 lock_sock(sk);
1100 err = compat_nf_setsockopt(sk, PF_INET, optname,
1101 optval, optlen);
1102 release_sock(sk);
1103 }
1104 #endif
1105 return err;
1106 }
1107 EXPORT_SYMBOL(compat_ip_setsockopt);
1108 #endif
1109
1110 /*
1111 * Get the options. Note for future reference. The GET of IP options gets
1112 * the _received_ ones. The set sets the _sent_ ones.
1113 */
1114
1115 static int do_ip_getsockopt(struct sock *sk, int level, int optname,
1116 char __user *optval, int __user *optlen, unsigned int flags)
1117 {
1118 struct inet_sock *inet = inet_sk(sk);
1119 int val;
1120 int len;
1121
1122 if (level != SOL_IP)
1123 return -EOPNOTSUPP;
1124
1125 if (ip_mroute_opt(optname))
1126 return ip_mroute_getsockopt(sk, optname, optval, optlen);
1127
1128 if (get_user(len, optlen))
1129 return -EFAULT;
1130 if (len < 0)
1131 return -EINVAL;
1132
1133 lock_sock(sk);
1134
1135 switch (optname) {
1136 case IP_OPTIONS:
1137 {
1138 unsigned char optbuf[sizeof(struct ip_options)+40];
1139 struct ip_options *opt = (struct ip_options *)optbuf;
1140 struct ip_options_rcu *inet_opt;
1141
1142 inet_opt = rcu_dereference_protected(inet->inet_opt,
1143 sock_owned_by_user(sk));
1144 opt->optlen = 0;
1145 if (inet_opt)
1146 memcpy(optbuf, &inet_opt->opt,
1147 sizeof(struct ip_options) +
1148 inet_opt->opt.optlen);
1149 release_sock(sk);
1150
1151 if (opt->optlen == 0)
1152 return put_user(0, optlen);
1153
1154 ip_options_undo(opt);
1155
1156 len = min_t(unsigned int, len, opt->optlen);
1157 if (put_user(len, optlen))
1158 return -EFAULT;
1159 if (copy_to_user(optval, opt->__data, len))
1160 return -EFAULT;
1161 return 0;
1162 }
1163 case IP_PKTINFO:
1164 val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
1165 break;
1166 case IP_RECVTTL:
1167 val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
1168 break;
1169 case IP_RECVTOS:
1170 val = (inet->cmsg_flags & IP_CMSG_TOS) != 0;
1171 break;
1172 case IP_RECVOPTS:
1173 val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0;
1174 break;
1175 case IP_RETOPTS:
1176 val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0;
1177 break;
1178 case IP_PASSSEC:
1179 val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0;
1180 break;
1181 case IP_RECVORIGDSTADDR:
1182 val = (inet->cmsg_flags & IP_CMSG_ORIGDSTADDR) != 0;
1183 break;
1184 case IP_TOS:
1185 val = inet->tos;
1186 break;
1187 case IP_TTL:
1188 val = (inet->uc_ttl == -1 ?
1189 sysctl_ip_default_ttl :
1190 inet->uc_ttl);
1191 break;
1192 case IP_HDRINCL:
1193 val = inet->hdrincl;
1194 break;
1195 case IP_NODEFRAG:
1196 val = inet->nodefrag;
1197 break;
1198 case IP_MTU_DISCOVER:
1199 val = inet->pmtudisc;
1200 break;
1201 case IP_MTU:
1202 {
1203 struct dst_entry *dst;
1204 val = 0;
1205 dst = sk_dst_get(sk);
1206 if (dst) {
1207 val = dst_mtu(dst);
1208 dst_release(dst);
1209 }
1210 if (!val) {
1211 release_sock(sk);
1212 return -ENOTCONN;
1213 }
1214 break;
1215 }
1216 case IP_RECVERR:
1217 val = inet->recverr;
1218 break;
1219 case IP_MULTICAST_TTL:
1220 val = inet->mc_ttl;
1221 break;
1222 case IP_MULTICAST_LOOP:
1223 val = inet->mc_loop;
1224 break;
1225 case IP_UNICAST_IF:
1226 val = (__force int)htonl((__u32) inet->uc_index);
1227 break;
1228 case IP_MULTICAST_IF:
1229 {
1230 struct in_addr addr;
1231 len = min_t(unsigned int, len, sizeof(struct in_addr));
1232 addr.s_addr = inet->mc_addr;
1233 release_sock(sk);
1234
1235 if (put_user(len, optlen))
1236 return -EFAULT;
1237 if (copy_to_user(optval, &addr, len))
1238 return -EFAULT;
1239 return 0;
1240 }
1241 case IP_MSFILTER:
1242 {
1243 struct ip_msfilter msf;
1244 int err;
1245
1246 if (len < IP_MSFILTER_SIZE(0)) {
1247 release_sock(sk);
1248 return -EINVAL;
1249 }
1250 if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
1251 release_sock(sk);
1252 return -EFAULT;
1253 }
1254 err = ip_mc_msfget(sk, &msf,
1255 (struct ip_msfilter __user *)optval, optlen);
1256 release_sock(sk);
1257 return err;
1258 }
1259 case MCAST_MSFILTER:
1260 {
1261 struct group_filter gsf;
1262 int err;
1263
1264 if (len < GROUP_FILTER_SIZE(0)) {
1265 release_sock(sk);
1266 return -EINVAL;
1267 }
1268 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
1269 release_sock(sk);
1270 return -EFAULT;
1271 }
1272 err = ip_mc_gsfget(sk, &gsf,
1273 (struct group_filter __user *)optval,
1274 optlen);
1275 release_sock(sk);
1276 return err;
1277 }
1278 case IP_MULTICAST_ALL:
1279 val = inet->mc_all;
1280 break;
1281 case IP_PKTOPTIONS:
1282 {
1283 struct msghdr msg;
1284
1285 release_sock(sk);
1286
1287 if (sk->sk_type != SOCK_STREAM)
1288 return -ENOPROTOOPT;
1289
1290 msg.msg_control = optval;
1291 msg.msg_controllen = len;
1292 msg.msg_flags = flags;
1293
1294 if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
1295 struct in_pktinfo info;
1296
1297 info.ipi_addr.s_addr = inet->inet_rcv_saddr;
1298 info.ipi_spec_dst.s_addr = inet->inet_rcv_saddr;
1299 info.ipi_ifindex = inet->mc_index;
1300 put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
1301 }
1302 if (inet->cmsg_flags & IP_CMSG_TTL) {
1303 int hlim = inet->mc_ttl;
1304 put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
1305 }
1306 if (inet->cmsg_flags & IP_CMSG_TOS) {
1307 int tos = inet->rcv_tos;
1308 put_cmsg(&msg, SOL_IP, IP_TOS, sizeof(tos), &tos);
1309 }
1310 len -= msg.msg_controllen;
1311 return put_user(len, optlen);
1312 }
1313 case IP_FREEBIND:
1314 val = inet->freebind;
1315 break;
1316 case IP_TRANSPARENT:
1317 val = inet->transparent;
1318 break;
1319 case IP_MINTTL:
1320 val = inet->min_ttl;
1321 break;
1322 default:
1323 release_sock(sk);
1324 return -ENOPROTOOPT;
1325 }
1326 release_sock(sk);
1327
1328 if (len < sizeof(int) && len > 0 && val >= 0 && val <= 255) {
1329 unsigned char ucval = (unsigned char)val;
1330 len = 1;
1331 if (put_user(len, optlen))
1332 return -EFAULT;
1333 if (copy_to_user(optval, &ucval, 1))
1334 return -EFAULT;
1335 } else {
1336 len = min_t(unsigned int, sizeof(int), len);
1337 if (put_user(len, optlen))
1338 return -EFAULT;
1339 if (copy_to_user(optval, &val, len))
1340 return -EFAULT;
1341 }
1342 return 0;
1343 }
1344
1345 int ip_getsockopt(struct sock *sk, int level,
1346 int optname, char __user *optval, int __user *optlen)
1347 {
1348 int err;
1349
1350 err = do_ip_getsockopt(sk, level, optname, optval, optlen, 0);
1351 #ifdef CONFIG_NETFILTER
1352 /* we need to exclude all possible ENOPROTOOPTs except default case */
1353 if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
1354 !ip_mroute_opt(optname)) {
1355 int len;
1356
1357 if (get_user(len, optlen))
1358 return -EFAULT;
1359
1360 lock_sock(sk);
1361 err = nf_getsockopt(sk, PF_INET, optname, optval,
1362 &len);
1363 release_sock(sk);
1364 if (err >= 0)
1365 err = put_user(len, optlen);
1366 return err;
1367 }
1368 #endif
1369 return err;
1370 }
1371 EXPORT_SYMBOL(ip_getsockopt);
1372
1373 #ifdef CONFIG_COMPAT
1374 int compat_ip_getsockopt(struct sock *sk, int level, int optname,
1375 char __user *optval, int __user *optlen)
1376 {
1377 int err;
1378
1379 if (optname == MCAST_MSFILTER)
1380 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1381 ip_getsockopt);
1382
1383 err = do_ip_getsockopt(sk, level, optname, optval, optlen,
1384 MSG_CMSG_COMPAT);
1385
1386 #ifdef CONFIG_NETFILTER
1387 /* we need to exclude all possible ENOPROTOOPTs except default case */
1388 if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
1389 !ip_mroute_opt(optname)) {
1390 int len;
1391
1392 if (get_user(len, optlen))
1393 return -EFAULT;
1394
1395 lock_sock(sk);
1396 err = compat_nf_getsockopt(sk, PF_INET, optname, optval, &len);
1397 release_sock(sk);
1398 if (err >= 0)
1399 err = put_user(len, optlen);
1400 return err;
1401 }
1402 #endif
1403 return err;
1404 }
1405 EXPORT_SYMBOL(compat_ip_getsockopt);
1406 #endif
kernel source for telekom puls (alcatel/mediatek)