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USB: EHCI: fix remote-wakeup support for ARC/TDI core
[linux-2.6/linux-2.6-openrd.git] / net / ipv4 / ip_sockglue.c
blob465abf0a9869c768ab7b7f0832050a2a0812f05c
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 <net/sock.h>
27 #include <net/ip.h>
28 #include <net/icmp.h>
29 #include <net/tcp_states.h>
30 #include <linux/udp.h>
31 #include <linux/igmp.h>
32 #include <linux/netfilter.h>
33 #include <linux/route.h>
34 #include <linux/mroute.h>
35 #include <net/route.h>
36 #include <net/xfrm.h>
37 #include <net/compat.h>
38 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
39 #include <net/transp_v6.h>
40 #endif
41
42 #include <linux/errqueue.h>
43 #include <asm/uaccess.h>
44
45 #define IP_CMSG_PKTINFO 1
46 #define IP_CMSG_TTL 2
47 #define IP_CMSG_TOS 4
48 #define IP_CMSG_RECVOPTS 8
49 #define IP_CMSG_RETOPTS 16
50 #define IP_CMSG_PASSSEC 32
51
52 /*
53 * SOL_IP control messages.
54 */
55
56 static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
57 {
58 struct in_pktinfo info;
59 struct rtable *rt = skb->rtable;
60
61 info.ipi_addr.s_addr = ip_hdr(skb)->daddr;
62 if (rt) {
63 info.ipi_ifindex = rt->rt_iif;
64 info.ipi_spec_dst.s_addr = rt->rt_spec_dst;
65 } else {
66 info.ipi_ifindex = 0;
67 info.ipi_spec_dst.s_addr = 0;
68 }
69
70 put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
71 }
72
73 static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
74 {
75 int ttl = ip_hdr(skb)->ttl;
76 put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
77 }
78
79 static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
80 {
81 put_cmsg(msg, SOL_IP, IP_TOS, 1, &ip_hdr(skb)->tos);
82 }
83
84 static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
85 {
86 if (IPCB(skb)->opt.optlen == 0)
87 return;
88
89 put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen,
90 ip_hdr(skb) + 1);
91 }
92
93
94 static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
95 {
96 unsigned char optbuf[sizeof(struct ip_options) + 40];
97 struct ip_options * opt = (struct ip_options*)optbuf;
98
99 if (IPCB(skb)->opt.optlen == 0)
100 return;
101
102 if (ip_options_echo(opt, skb)) {
103 msg->msg_flags |= MSG_CTRUNC;
104 return;
105 }
106 ip_options_undo(opt);
107
108 put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
109 }
110
111 static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
112 {
113 char *secdata;
114 u32 seclen, secid;
115 int err;
116
117 err = security_socket_getpeersec_dgram(NULL, skb, &secid);
118 if (err)
119 return;
120
121 err = security_secid_to_secctx(secid, &secdata, &seclen);
122 if (err)
123 return;
124
125 put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata);
126 security_release_secctx(secdata, seclen);
127 }
128
129
130 void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
131 {
132 struct inet_sock *inet = inet_sk(skb->sk);
133 unsigned flags = inet->cmsg_flags;
134
135 /* Ordered by supposed usage frequency */
136 if (flags & 1)
137 ip_cmsg_recv_pktinfo(msg, skb);
138 if ((flags>>=1) == 0)
139 return;
140
141 if (flags & 1)
142 ip_cmsg_recv_ttl(msg, skb);
143 if ((flags>>=1) == 0)
144 return;
145
146 if (flags & 1)
147 ip_cmsg_recv_tos(msg, skb);
148 if ((flags>>=1) == 0)
149 return;
150
151 if (flags & 1)
152 ip_cmsg_recv_opts(msg, skb);
153 if ((flags>>=1) == 0)
154 return;
155
156 if (flags & 1)
157 ip_cmsg_recv_retopts(msg, skb);
158 if ((flags>>=1) == 0)
159 return;
160
161 if (flags & 1)
162 ip_cmsg_recv_security(msg, skb);
163 }
164
165 int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc)
166 {
167 int err;
168 struct cmsghdr *cmsg;
169
170 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
171 if (!CMSG_OK(msg, cmsg))
172 return -EINVAL;
173 if (cmsg->cmsg_level != SOL_IP)
174 continue;
175 switch (cmsg->cmsg_type) {
176 case IP_RETOPTS:
177 err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
178 err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40);
179 if (err)
180 return err;
181 break;
182 case IP_PKTINFO:
183 {
184 struct in_pktinfo *info;
185 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
186 return -EINVAL;
187 info = (struct in_pktinfo *)CMSG_DATA(cmsg);
188 ipc->oif = info->ipi_ifindex;
189 ipc->addr = info->ipi_spec_dst.s_addr;
190 break;
191 }
192 default:
193 return -EINVAL;
194 }
195 }
196 return 0;
197 }
198
199
200 /* Special input handler for packets caught by router alert option.
201 They are selected only by protocol field, and then processed likely
202 local ones; but only if someone wants them! Otherwise, router
203 not running rsvpd will kill RSVP.
204
205 It is user level problem, what it will make with them.
206 I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
207 but receiver should be enough clever f.e. to forward mtrace requests,
208 sent to multicast group to reach destination designated router.
209 */
210 struct ip_ra_chain *ip_ra_chain;
211 DEFINE_RWLOCK(ip_ra_lock);
212
213 int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *))
214 {
215 struct ip_ra_chain *ra, *new_ra, **rap;
216
217 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW)
218 return -EINVAL;
219
220 new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
221
222 write_lock_bh(&ip_ra_lock);
223 for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
224 if (ra->sk == sk) {
225 if (on) {
226 write_unlock_bh(&ip_ra_lock);
227 kfree(new_ra);
228 return -EADDRINUSE;
229 }
230 *rap = ra->next;
231 write_unlock_bh(&ip_ra_lock);
232
233 if (ra->destructor)
234 ra->destructor(sk);
235 sock_put(sk);
236 kfree(ra);
237 return 0;
238 }
239 }
240 if (new_ra == NULL) {
241 write_unlock_bh(&ip_ra_lock);
242 return -ENOBUFS;
243 }
244 new_ra->sk = sk;
245 new_ra->destructor = destructor;
246
247 new_ra->next = ra;
248 *rap = new_ra;
249 sock_hold(sk);
250 write_unlock_bh(&ip_ra_lock);
251
252 return 0;
253 }
254
255 void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
256 __be16 port, u32 info, u8 *payload)
257 {
258 struct inet_sock *inet = inet_sk(sk);
259 struct sock_exterr_skb *serr;
260
261 if (!inet->recverr)
262 return;
263
264 skb = skb_clone(skb, GFP_ATOMIC);
265 if (!skb)
266 return;
267
268 serr = SKB_EXT_ERR(skb);
269 serr->ee.ee_errno = err;
270 serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
271 serr->ee.ee_type = icmp_hdr(skb)->type;
272 serr->ee.ee_code = icmp_hdr(skb)->code;
273 serr->ee.ee_pad = 0;
274 serr->ee.ee_info = info;
275 serr->ee.ee_data = 0;
276 serr->addr_offset = (u8 *)&(((struct iphdr *)(icmp_hdr(skb) + 1))->daddr) -
277 skb_network_header(skb);
278 serr->port = port;
279
280 if (skb_pull(skb, payload - skb->data) != NULL) {
281 skb_reset_transport_header(skb);
282 if (sock_queue_err_skb(sk, skb) == 0)
283 return;
284 }
285 kfree_skb(skb);
286 }
287
288 void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 port, u32 info)
289 {
290 struct inet_sock *inet = inet_sk(sk);
291 struct sock_exterr_skb *serr;
292 struct iphdr *iph;
293 struct sk_buff *skb;
294
295 if (!inet->recverr)
296 return;
297
298 skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
299 if (!skb)
300 return;
301
302 skb_put(skb, sizeof(struct iphdr));
303 skb_reset_network_header(skb);
304 iph = ip_hdr(skb);
305 iph->daddr = daddr;
306
307 serr = SKB_EXT_ERR(skb);
308 serr->ee.ee_errno = err;
309 serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
310 serr->ee.ee_type = 0;
311 serr->ee.ee_code = 0;
312 serr->ee.ee_pad = 0;
313 serr->ee.ee_info = info;
314 serr->ee.ee_data = 0;
315 serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb);
316 serr->port = port;
317
318 __skb_pull(skb, skb_tail_pointer(skb) - skb->data);
319 skb_reset_transport_header(skb);
320
321 if (sock_queue_err_skb(sk, skb))
322 kfree_skb(skb);
323 }
324
325 /*
326 * Handle MSG_ERRQUEUE
327 */
328 int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
329 {
330 struct sock_exterr_skb *serr;
331 struct sk_buff *skb, *skb2;
332 struct sockaddr_in *sin;
333 struct {
334 struct sock_extended_err ee;
335 struct sockaddr_in offender;
336 } errhdr;
337 int err;
338 int copied;
339
340 err = -EAGAIN;
341 skb = skb_dequeue(&sk->sk_error_queue);
342 if (skb == NULL)
343 goto out;
344
345 copied = skb->len;
346 if (copied > len) {
347 msg->msg_flags |= MSG_TRUNC;
348 copied = len;
349 }
350 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
351 if (err)
352 goto out_free_skb;
353
354 sock_recv_timestamp(msg, sk, skb);
355
356 serr = SKB_EXT_ERR(skb);
357
358 sin = (struct sockaddr_in *)msg->msg_name;
359 if (sin) {
360 sin->sin_family = AF_INET;
361 sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) +
362 serr->addr_offset);
363 sin->sin_port = serr->port;
364 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
365 }
366
367 memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
368 sin = &errhdr.offender;
369 sin->sin_family = AF_UNSPEC;
370 if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
371 struct inet_sock *inet = inet_sk(sk);
372
373 sin->sin_family = AF_INET;
374 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
375 sin->sin_port = 0;
376 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
377 if (inet->cmsg_flags)
378 ip_cmsg_recv(msg, skb);
379 }
380
381 put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
382
383 /* Now we could try to dump offended packet options */
384
385 msg->msg_flags |= MSG_ERRQUEUE;
386 err = copied;
387
388 /* Reset and regenerate socket error */
389 spin_lock_bh(&sk->sk_error_queue.lock);
390 sk->sk_err = 0;
391 if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
392 sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
393 spin_unlock_bh(&sk->sk_error_queue.lock);
394 sk->sk_error_report(sk);
395 } else
396 spin_unlock_bh(&sk->sk_error_queue.lock);
397
398 out_free_skb:
399 kfree_skb(skb);
400 out:
401 return err;
402 }
403
404
405 /*
406 * Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
407 * an IP socket.
408 */
409
410 static int do_ip_setsockopt(struct sock *sk, int level,
411 int optname, char __user *optval, int optlen)
412 {
413 struct inet_sock *inet = inet_sk(sk);
414 int val=0,err;
415
416 if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
417 (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
418 (1<<IP_RETOPTS) | (1<<IP_TOS) |
419 (1<<IP_TTL) | (1<<IP_HDRINCL) |
420 (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
421 (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) |
422 (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT))) ||
423 optname == IP_MULTICAST_TTL ||
424 optname == IP_MULTICAST_LOOP) {
425 if (optlen >= sizeof(int)) {
426 if (get_user(val, (int __user *) optval))
427 return -EFAULT;
428 } else if (optlen >= sizeof(char)) {
429 unsigned char ucval;
430
431 if (get_user(ucval, (unsigned char __user *) optval))
432 return -EFAULT;
433 val = (int) ucval;
434 }
435 }
436
437 /* If optlen==0, it is equivalent to val == 0 */
438
439 if (ip_mroute_opt(optname))
440 return ip_mroute_setsockopt(sk,optname,optval,optlen);
441
442 err = 0;
443 lock_sock(sk);
444
445 switch (optname) {
446 case IP_OPTIONS:
447 {
448 struct ip_options * opt = NULL;
449 if (optlen > 40 || optlen < 0)
450 goto e_inval;
451 err = ip_options_get_from_user(sock_net(sk), &opt,
452 optval, optlen);
453 if (err)
454 break;
455 if (inet->is_icsk) {
456 struct inet_connection_sock *icsk = inet_csk(sk);
457 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
458 if (sk->sk_family == PF_INET ||
459 (!((1 << sk->sk_state) &
460 (TCPF_LISTEN | TCPF_CLOSE)) &&
461 inet->daddr != LOOPBACK4_IPV6)) {
462 #endif
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);
468 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
469 }
470 #endif
471 }
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 (inet->tos != val) {
518 inet->tos = val;
519 sk->sk_priority = rt_tos2priority(val);
520 sk_dst_reset(sk);
521 }
522 break;
523 case IP_TTL:
524 if (optlen<1)
525 goto e_inval;
526 if (val != -1 && (val < 1 || val>255))
527 goto e_inval;
528 inet->uc_ttl = val;
529 break;
530 case IP_HDRINCL:
531 if (sk->sk_type != SOCK_RAW) {
532 err = -ENOPROTOOPT;
533 break;
534 }
535 inet->hdrincl = val ? 1 : 0;
536 break;
537 case IP_MTU_DISCOVER:
538 if (val<0 || val>3)
539 goto e_inval;
540 inet->pmtudisc = val;
541 break;
542 case IP_RECVERR:
543 inet->recverr = !!val;
544 if (!val)
545 skb_queue_purge(&sk->sk_error_queue);
546 break;
547 case IP_MULTICAST_TTL:
548 if (sk->sk_type == SOCK_STREAM)
549 goto e_inval;
550 if (optlen<1)
551 goto e_inval;
552 if (val==-1)
553 val = 1;
554 if (val < 0 || val > 255)
555 goto e_inval;
556 inet->mc_ttl = val;
557 break;
558 case IP_MULTICAST_LOOP:
559 if (optlen<1)
560 goto e_inval;
561 inet->mc_loop = !!val;
562 break;
563 case IP_MULTICAST_IF:
564 {
565 struct ip_mreqn mreq;
566 struct net_device *dev = NULL;
567
568 if (sk->sk_type == SOCK_STREAM)
569 goto e_inval;
570 /*
571 * Check the arguments are allowable
572 */
573
574 err = -EFAULT;
575 if (optlen >= sizeof(struct ip_mreqn)) {
576 if (copy_from_user(&mreq,optval,sizeof(mreq)))
577 break;
578 } else {
579 memset(&mreq, 0, sizeof(mreq));
580 if (optlen >= sizeof(struct in_addr) &&
581 copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr)))
582 break;
583 }
584
585 if (!mreq.imr_ifindex) {
586 if (mreq.imr_address.s_addr == htonl(INADDR_ANY)) {
587 inet->mc_index = 0;
588 inet->mc_addr = 0;
589 err = 0;
590 break;
591 }
592 dev = ip_dev_find(sock_net(sk), mreq.imr_address.s_addr);
593 if (dev) {
594 mreq.imr_ifindex = dev->ifindex;
595 dev_put(dev);
596 }
597 } else
598 dev = __dev_get_by_index(sock_net(sk), mreq.imr_ifindex);
599
600
601 err = -EADDRNOTAVAIL;
602 if (!dev)
603 break;
604
605 err = -EINVAL;
606 if (sk->sk_bound_dev_if &&
607 mreq.imr_ifindex != sk->sk_bound_dev_if)
608 break;
609
610 inet->mc_index = mreq.imr_ifindex;
611 inet->mc_addr = mreq.imr_address.s_addr;
612 err = 0;
613 break;
614 }
615
616 case IP_ADD_MEMBERSHIP:
617 case IP_DROP_MEMBERSHIP:
618 {
619 struct ip_mreqn mreq;
620
621 err = -EPROTO;
622 if (inet_sk(sk)->is_icsk)
623 break;
624
625 if (optlen < sizeof(struct ip_mreq))
626 goto e_inval;
627 err = -EFAULT;
628 if (optlen >= sizeof(struct ip_mreqn)) {
629 if (copy_from_user(&mreq,optval,sizeof(mreq)))
630 break;
631 } else {
632 memset(&mreq, 0, sizeof(mreq));
633 if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq)))
634 break;
635 }
636
637 if (optname == IP_ADD_MEMBERSHIP)
638 err = ip_mc_join_group(sk, &mreq);
639 else
640 err = ip_mc_leave_group(sk, &mreq);
641 break;
642 }
643 case IP_MSFILTER:
644 {
645 extern int sysctl_igmp_max_msf;
646 struct ip_msfilter *msf;
647
648 if (optlen < IP_MSFILTER_SIZE(0))
649 goto e_inval;
650 if (optlen > sysctl_optmem_max) {
651 err = -ENOBUFS;
652 break;
653 }
654 msf = kmalloc(optlen, GFP_KERNEL);
655 if (!msf) {
656 err = -ENOBUFS;
657 break;
658 }
659 err = -EFAULT;
660 if (copy_from_user(msf, optval, optlen)) {
661 kfree(msf);
662 break;
663 }
664 /* numsrc >= (1G-4) overflow in 32 bits */
665 if (msf->imsf_numsrc >= 0x3ffffffcU ||
666 msf->imsf_numsrc > sysctl_igmp_max_msf) {
667 kfree(msf);
668 err = -ENOBUFS;
669 break;
670 }
671 if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
672 kfree(msf);
673 err = -EINVAL;
674 break;
675 }
676 err = ip_mc_msfilter(sk, msf, 0);
677 kfree(msf);
678 break;
679 }
680 case IP_BLOCK_SOURCE:
681 case IP_UNBLOCK_SOURCE:
682 case IP_ADD_SOURCE_MEMBERSHIP:
683 case IP_DROP_SOURCE_MEMBERSHIP:
684 {
685 struct ip_mreq_source mreqs;
686 int omode, add;
687
688 if (optlen != sizeof(struct ip_mreq_source))
689 goto e_inval;
690 if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
691 err = -EFAULT;
692 break;
693 }
694 if (optname == IP_BLOCK_SOURCE) {
695 omode = MCAST_EXCLUDE;
696 add = 1;
697 } else if (optname == IP_UNBLOCK_SOURCE) {
698 omode = MCAST_EXCLUDE;
699 add = 0;
700 } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
701 struct ip_mreqn mreq;
702
703 mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
704 mreq.imr_address.s_addr = mreqs.imr_interface;
705 mreq.imr_ifindex = 0;
706 err = ip_mc_join_group(sk, &mreq);
707 if (err && err != -EADDRINUSE)
708 break;
709 omode = MCAST_INCLUDE;
710 add = 1;
711 } else /* IP_DROP_SOURCE_MEMBERSHIP */ {
712 omode = MCAST_INCLUDE;
713 add = 0;
714 }
715 err = ip_mc_source(add, omode, sk, &mreqs, 0);
716 break;
717 }
718 case MCAST_JOIN_GROUP:
719 case MCAST_LEAVE_GROUP:
720 {
721 struct group_req greq;
722 struct sockaddr_in *psin;
723 struct ip_mreqn mreq;
724
725 if (optlen < sizeof(struct group_req))
726 goto e_inval;
727 err = -EFAULT;
728 if (copy_from_user(&greq, optval, sizeof(greq)))
729 break;
730 psin = (struct sockaddr_in *)&greq.gr_group;
731 if (psin->sin_family != AF_INET)
732 goto e_inval;
733 memset(&mreq, 0, sizeof(mreq));
734 mreq.imr_multiaddr = psin->sin_addr;
735 mreq.imr_ifindex = greq.gr_interface;
736
737 if (optname == MCAST_JOIN_GROUP)
738 err = ip_mc_join_group(sk, &mreq);
739 else
740 err = ip_mc_leave_group(sk, &mreq);
741 break;
742 }
743 case MCAST_JOIN_SOURCE_GROUP:
744 case MCAST_LEAVE_SOURCE_GROUP:
745 case MCAST_BLOCK_SOURCE:
746 case MCAST_UNBLOCK_SOURCE:
747 {
748 struct group_source_req greqs;
749 struct ip_mreq_source mreqs;
750 struct sockaddr_in *psin;
751 int omode, add;
752
753 if (optlen != sizeof(struct group_source_req))
754 goto e_inval;
755 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
756 err = -EFAULT;
757 break;
758 }
759 if (greqs.gsr_group.ss_family != AF_INET ||
760 greqs.gsr_source.ss_family != AF_INET) {
761 err = -EADDRNOTAVAIL;
762 break;
763 }
764 psin = (struct sockaddr_in *)&greqs.gsr_group;
765 mreqs.imr_multiaddr = psin->sin_addr.s_addr;
766 psin = (struct sockaddr_in *)&greqs.gsr_source;
767 mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
768 mreqs.imr_interface = 0; /* use index for mc_source */
769
770 if (optname == MCAST_BLOCK_SOURCE) {
771 omode = MCAST_EXCLUDE;
772 add = 1;
773 } else if (optname == MCAST_UNBLOCK_SOURCE) {
774 omode = MCAST_EXCLUDE;
775 add = 0;
776 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
777 struct ip_mreqn mreq;
778
779 psin = (struct sockaddr_in *)&greqs.gsr_group;
780 mreq.imr_multiaddr = psin->sin_addr;
781 mreq.imr_address.s_addr = 0;
782 mreq.imr_ifindex = greqs.gsr_interface;
783 err = ip_mc_join_group(sk, &mreq);
784 if (err && err != -EADDRINUSE)
785 break;
786 greqs.gsr_interface = mreq.imr_ifindex;
787 omode = MCAST_INCLUDE;
788 add = 1;
789 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
790 omode = MCAST_INCLUDE;
791 add = 0;
792 }
793 err = ip_mc_source(add, omode, sk, &mreqs,
794 greqs.gsr_interface);
795 break;
796 }
797 case MCAST_MSFILTER:
798 {
799 extern int sysctl_igmp_max_msf;
800 struct sockaddr_in *psin;
801 struct ip_msfilter *msf = NULL;
802 struct group_filter *gsf = NULL;
803 int msize, i, ifindex;
804
805 if (optlen < GROUP_FILTER_SIZE(0))
806 goto e_inval;
807 if (optlen > sysctl_optmem_max) {
808 err = -ENOBUFS;
809 break;
810 }
811 gsf = kmalloc(optlen,GFP_KERNEL);
812 if (!gsf) {
813 err = -ENOBUFS;
814 break;
815 }
816 err = -EFAULT;
817 if (copy_from_user(gsf, optval, optlen)) {
818 goto mc_msf_out;
819 }
820 /* numsrc >= (4G-140)/128 overflow in 32 bits */
821 if (gsf->gf_numsrc >= 0x1ffffff ||
822 gsf->gf_numsrc > sysctl_igmp_max_msf) {
823 err = -ENOBUFS;
824 goto mc_msf_out;
825 }
826 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
827 err = -EINVAL;
828 goto mc_msf_out;
829 }
830 msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
831 msf = kmalloc(msize,GFP_KERNEL);
832 if (!msf) {
833 err = -ENOBUFS;
834 goto mc_msf_out;
835 }
836 ifindex = gsf->gf_interface;
837 psin = (struct sockaddr_in *)&gsf->gf_group;
838 if (psin->sin_family != AF_INET) {
839 err = -EADDRNOTAVAIL;
840 goto mc_msf_out;
841 }
842 msf->imsf_multiaddr = psin->sin_addr.s_addr;
843 msf->imsf_interface = 0;
844 msf->imsf_fmode = gsf->gf_fmode;
845 msf->imsf_numsrc = gsf->gf_numsrc;
846 err = -EADDRNOTAVAIL;
847 for (i=0; i<gsf->gf_numsrc; ++i) {
848 psin = (struct sockaddr_in *)&gsf->gf_slist[i];
849
850 if (psin->sin_family != AF_INET)
851 goto mc_msf_out;
852 msf->imsf_slist[i] = psin->sin_addr.s_addr;
853 }
854 kfree(gsf);
855 gsf = NULL;
856
857 err = ip_mc_msfilter(sk, msf, ifindex);
858 mc_msf_out:
859 kfree(msf);
860 kfree(gsf);
861 break;
862 }
863 case IP_ROUTER_ALERT:
864 err = ip_ra_control(sk, val ? 1 : 0, NULL);
865 break;
866
867 case IP_FREEBIND:
868 if (optlen<1)
869 goto e_inval;
870 inet->freebind = !!val;
871 break;
872
873 case IP_IPSEC_POLICY:
874 case IP_XFRM_POLICY:
875 err = -EPERM;
876 if (!capable(CAP_NET_ADMIN))
877 break;
878 err = xfrm_user_policy(sk, optname, optval, optlen);
879 break;
880
881 case IP_TRANSPARENT:
882 if (!capable(CAP_NET_ADMIN)) {
883 err = -EPERM;
884 break;
885 }
886 if (optlen < 1)
887 goto e_inval;
888 inet->transparent = !!val;
889 break;
890
891 default:
892 err = -ENOPROTOOPT;
893 break;
894 }
895 release_sock(sk);
896 return err;
897
898 e_inval:
899 release_sock(sk);
900 return -EINVAL;
901 }
902
903 int ip_setsockopt(struct sock *sk, int level,
904 int optname, char __user *optval, int optlen)
905 {
906 int err;
907
908 if (level != SOL_IP)
909 return -ENOPROTOOPT;
910
911 err = do_ip_setsockopt(sk, level, optname, optval, optlen);
912 #ifdef CONFIG_NETFILTER
913 /* we need to exclude all possible ENOPROTOOPTs except default case */
914 if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
915 optname != IP_IPSEC_POLICY &&
916 optname != IP_XFRM_POLICY &&
917 !ip_mroute_opt(optname)) {
918 lock_sock(sk);
919 err = nf_setsockopt(sk, PF_INET, optname, optval, optlen);
920 release_sock(sk);
921 }
922 #endif
923 return err;
924 }
925
926 #ifdef CONFIG_COMPAT
927 int compat_ip_setsockopt(struct sock *sk, int level, int optname,
928 char __user *optval, int optlen)
929 {
930 int err;
931
932 if (level != SOL_IP)
933 return -ENOPROTOOPT;
934
935 if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
936 return compat_mc_setsockopt(sk, level, optname, optval, optlen,
937 ip_setsockopt);
938
939 err = do_ip_setsockopt(sk, level, optname, optval, optlen);
940 #ifdef CONFIG_NETFILTER
941 /* we need to exclude all possible ENOPROTOOPTs except default case */
942 if (err == -ENOPROTOOPT && optname != IP_HDRINCL &&
943 optname != IP_IPSEC_POLICY &&
944 optname != IP_XFRM_POLICY &&
945 !ip_mroute_opt(optname)) {
946 lock_sock(sk);
947 err = compat_nf_setsockopt(sk, PF_INET, optname,
948 optval, optlen);
949 release_sock(sk);
950 }
951 #endif
952 return err;
953 }
954
955 EXPORT_SYMBOL(compat_ip_setsockopt);
956 #endif
957
958 /*
959 * Get the options. Note for future reference. The GET of IP options gets the
960 * _received_ ones. The set sets the _sent_ ones.
961 */
962
963 static int do_ip_getsockopt(struct sock *sk, int level, int optname,
964 char __user *optval, int __user *optlen)
965 {
966 struct inet_sock *inet = inet_sk(sk);
967 int val;
968 int len;
969
970 if (level != SOL_IP)
971 return -EOPNOTSUPP;
972
973 if (ip_mroute_opt(optname))
974 return ip_mroute_getsockopt(sk,optname,optval,optlen);
975
976 if (get_user(len,optlen))
977 return -EFAULT;
978 if (len < 0)
979 return -EINVAL;
980
981 lock_sock(sk);
982
983 switch (optname) {
984 case IP_OPTIONS:
985 {
986 unsigned char optbuf[sizeof(struct ip_options)+40];
987 struct ip_options * opt = (struct ip_options*)optbuf;
988 opt->optlen = 0;
989 if (inet->opt)
990 memcpy(optbuf, inet->opt,
991 sizeof(struct ip_options)+
992 inet->opt->optlen);
993 release_sock(sk);
994
995 if (opt->optlen == 0)
996 return put_user(0, optlen);
997
998 ip_options_undo(opt);
999
1000 len = min_t(unsigned int, len, opt->optlen);
1001 if (put_user(len, optlen))
1002 return -EFAULT;
1003 if (copy_to_user(optval, opt->__data, len))
1004 return -EFAULT;
1005 return 0;
1006 }
1007 case IP_PKTINFO:
1008 val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
1009 break;
1010 case IP_RECVTTL:
1011 val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
1012 break;
1013 case IP_RECVTOS:
1014 val = (inet->cmsg_flags & IP_CMSG_TOS) != 0;
1015 break;
1016 case IP_RECVOPTS:
1017 val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0;
1018 break;
1019 case IP_RETOPTS:
1020 val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0;
1021 break;
1022 case IP_PASSSEC:
1023 val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0;
1024 break;
1025 case IP_TOS:
1026 val = inet->tos;
1027 break;
1028 case IP_TTL:
1029 val = (inet->uc_ttl == -1 ?
1030 sysctl_ip_default_ttl :
1031 inet->uc_ttl);
1032 break;
1033 case IP_HDRINCL:
1034 val = inet->hdrincl;
1035 break;
1036 case IP_MTU_DISCOVER:
1037 val = inet->pmtudisc;
1038 break;
1039 case IP_MTU:
1040 {
1041 struct dst_entry *dst;
1042 val = 0;
1043 dst = sk_dst_get(sk);
1044 if (dst) {
1045 val = dst_mtu(dst);
1046 dst_release(dst);
1047 }
1048 if (!val) {
1049 release_sock(sk);
1050 return -ENOTCONN;
1051 }
1052 break;
1053 }
1054 case IP_RECVERR:
1055 val = inet->recverr;
1056 break;
1057 case IP_MULTICAST_TTL:
1058 val = inet->mc_ttl;
1059 break;
1060 case IP_MULTICAST_LOOP:
1061 val = inet->mc_loop;
1062 break;
1063 case IP_MULTICAST_IF:
1064 {
1065 struct in_addr addr;
1066 len = min_t(unsigned int, len, sizeof(struct in_addr));
1067 addr.s_addr = inet->mc_addr;
1068 release_sock(sk);
1069
1070 if (put_user(len, optlen))
1071 return -EFAULT;
1072 if (copy_to_user(optval, &addr, len))
1073 return -EFAULT;
1074 return 0;
1075 }
1076 case IP_MSFILTER:
1077 {
1078 struct ip_msfilter msf;
1079 int err;
1080
1081 if (len < IP_MSFILTER_SIZE(0)) {
1082 release_sock(sk);
1083 return -EINVAL;
1084 }
1085 if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
1086 release_sock(sk);
1087 return -EFAULT;
1088 }
1089 err = ip_mc_msfget(sk, &msf,
1090 (struct ip_msfilter __user *)optval, optlen);
1091 release_sock(sk);
1092 return err;
1093 }
1094 case MCAST_MSFILTER:
1095 {
1096 struct group_filter gsf;
1097 int err;
1098
1099 if (len < GROUP_FILTER_SIZE(0)) {
1100 release_sock(sk);
1101 return -EINVAL;
1102 }
1103 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
1104 release_sock(sk);
1105 return -EFAULT;
1106 }
1107 err = ip_mc_gsfget(sk, &gsf,
1108 (struct group_filter __user *)optval, optlen);
1109 release_sock(sk);
1110 return err;
1111 }
1112 case IP_PKTOPTIONS:
1113 {
1114 struct msghdr msg;
1115
1116 release_sock(sk);
1117
1118 if (sk->sk_type != SOCK_STREAM)
1119 return -ENOPROTOOPT;
1120
1121 msg.msg_control = optval;
1122 msg.msg_controllen = len;
1123 msg.msg_flags = 0;
1124
1125 if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
1126 struct in_pktinfo info;
1127
1128 info.ipi_addr.s_addr = inet->rcv_saddr;
1129 info.ipi_spec_dst.s_addr = inet->rcv_saddr;
1130 info.ipi_ifindex = inet->mc_index;
1131 put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
1132 }
1133 if (inet->cmsg_flags & IP_CMSG_TTL) {
1134 int hlim = inet->mc_ttl;
1135 put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
1136 }
1137 len -= msg.msg_controllen;
1138 return put_user(len, optlen);
1139 }
1140 case IP_FREEBIND:
1141 val = inet->freebind;
1142 break;
1143 case IP_TRANSPARENT:
1144 val = inet->transparent;
1145 break;
1146 default:
1147 release_sock(sk);
1148 return -ENOPROTOOPT;
1149 }
1150 release_sock(sk);
1151
1152 if (len < sizeof(int) && len > 0 && val>=0 && val<=255) {
1153 unsigned char ucval = (unsigned char)val;
1154 len = 1;
1155 if (put_user(len, optlen))
1156 return -EFAULT;
1157 if (copy_to_user(optval,&ucval,1))
1158 return -EFAULT;
1159 } else {
1160 len = min_t(unsigned int, sizeof(int), len);
1161 if (put_user(len, optlen))
1162 return -EFAULT;
1163 if (copy_to_user(optval,&val,len))
1164 return -EFAULT;
1165 }
1166 return 0;
1167 }
1168
1169 int ip_getsockopt(struct sock *sk, int level,
1170 int optname, char __user *optval, int __user *optlen)
1171 {
1172 int err;
1173
1174 err = do_ip_getsockopt(sk, level, optname, optval, optlen);
1175 #ifdef CONFIG_NETFILTER
1176 /* we need to exclude all possible ENOPROTOOPTs except default case */
1177 if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
1178 !ip_mroute_opt(optname)) {
1179 int len;
1180
1181 if (get_user(len,optlen))
1182 return -EFAULT;
1183
1184 lock_sock(sk);
1185 err = nf_getsockopt(sk, PF_INET, optname, optval,
1186 &len);
1187 release_sock(sk);
1188 if (err >= 0)
1189 err = put_user(len, optlen);
1190 return err;
1191 }
1192 #endif
1193 return err;
1194 }
1195
1196 #ifdef CONFIG_COMPAT
1197 int compat_ip_getsockopt(struct sock *sk, int level, int optname,
1198 char __user *optval, int __user *optlen)
1199 {
1200 int err;
1201
1202 if (optname == MCAST_MSFILTER)
1203 return compat_mc_getsockopt(sk, level, optname, optval, optlen,
1204 ip_getsockopt);
1205
1206 err = do_ip_getsockopt(sk, level, optname, optval, optlen);
1207
1208 #ifdef CONFIG_NETFILTER
1209 /* we need to exclude all possible ENOPROTOOPTs except default case */
1210 if (err == -ENOPROTOOPT && optname != IP_PKTOPTIONS &&
1211 !ip_mroute_opt(optname)) {
1212 int len;
1213
1214 if (get_user(len, optlen))
1215 return -EFAULT;
1216
1217 lock_sock(sk);
1218 err = compat_nf_getsockopt(sk, PF_INET, optname, optval, &len);
1219 release_sock(sk);
1220 if (err >= 0)
1221 err = put_user(len, optlen);
1222 return err;
1223 }
1224 #endif
1225 return err;
1226 }
1227
1228 EXPORT_SYMBOL(compat_ip_getsockopt);
1229 #endif
1230
1231 EXPORT_SYMBOL(ip_cmsg_recv);
1232
1233 EXPORT_SYMBOL(ip_getsockopt);
1234 EXPORT_SYMBOL(ip_setsockopt);
linux 2.6 git repository for openrd