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.
8 * Version: $Id: ip_sockglue.c,v 1.62 2002/02/01 22:01:04 davem Exp $
13 * Many : Split from ip.c , see ip.c for history.
14 * Martin Mares : TOS setting fixed.
15 * Alan Cox : Fixed a couple of oopses in Martin's
17 * Mike McLagan : Routing by source
20 #include <linux/config.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
24 #include <linux/sched.h>
25 #include <linux/skbuff.h>
27 #include <linux/icmp.h>
28 #include <linux/netdevice.h>
32 #include <net/tcp_states.h>
33 #include <linux/udp.h>
34 #include <linux/igmp.h>
35 #include <linux/netfilter.h>
36 #include <linux/route.h>
37 #include <linux/mroute.h>
38 #include <net/route.h>
40 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
41 #include <net/transp_v6.h>
44 #include <linux/errqueue.h>
45 #include <asm/uaccess.h>
47 #define IP_CMSG_PKTINFO 1
50 #define IP_CMSG_RECVOPTS 8
51 #define IP_CMSG_RETOPTS 16
54 * SOL_IP control messages.
57 static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
59 struct in_pktinfo info;
60 struct rtable *rt = (struct rtable *)skb->dst;
62 info.ipi_addr.s_addr = skb->nh.iph->daddr;
64 info.ipi_ifindex = rt->rt_iif;
65 info.ipi_spec_dst.s_addr = rt->rt_spec_dst;
68 info.ipi_spec_dst.s_addr = 0;
71 put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
74 static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb)
76 int ttl = skb->nh.iph->ttl;
77 put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl);
80 static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb)
82 put_cmsg(msg, SOL_IP, IP_TOS, 1, &skb->nh.iph->tos);
85 static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
87 if (IPCB(skb)->opt.optlen == 0)
90 put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, skb->nh.iph+1);
94 static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
96 unsigned char optbuf[sizeof(struct ip_options) + 40];
97 struct ip_options * opt = (struct ip_options*)optbuf;
99 if (IPCB(skb)->opt.optlen == 0)
102 if (ip_options_echo(opt, skb)) {
103 msg->msg_flags |= MSG_CTRUNC;
106 ip_options_undo(opt);
108 put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data);
112 void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
114 struct inet_sock *inet = inet_sk(skb->sk);
115 unsigned flags = inet->cmsg_flags;
117 /* Ordered by supposed usage frequency */
119 ip_cmsg_recv_pktinfo(msg, skb);
120 if ((flags>>=1) == 0)
124 ip_cmsg_recv_ttl(msg, skb);
125 if ((flags>>=1) == 0)
129 ip_cmsg_recv_tos(msg, skb);
130 if ((flags>>=1) == 0)
134 ip_cmsg_recv_opts(msg, skb);
135 if ((flags>>=1) == 0)
139 ip_cmsg_recv_retopts(msg, skb);
142 int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
145 struct cmsghdr *cmsg;
147 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
148 if (!CMSG_OK(msg, cmsg))
150 if (cmsg->cmsg_level != SOL_IP)
152 switch (cmsg->cmsg_type) {
154 err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
155 err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40);
161 struct in_pktinfo *info;
162 if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo)))
164 info = (struct in_pktinfo *)CMSG_DATA(cmsg);
165 ipc->oif = info->ipi_ifindex;
166 ipc->addr = info->ipi_spec_dst.s_addr;
177 /* Special input handler for packets caught by router alert option.
178 They are selected only by protocol field, and then processed likely
179 local ones; but only if someone wants them! Otherwise, router
180 not running rsvpd will kill RSVP.
182 It is user level problem, what it will make with them.
183 I have no idea, how it will masquearde or NAT them (it is joke, joke :-)),
184 but receiver should be enough clever f.e. to forward mtrace requests,
185 sent to multicast group to reach destination designated router.
187 struct ip_ra_chain *ip_ra_chain;
188 DEFINE_RWLOCK(ip_ra_lock);
190 int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *))
192 struct ip_ra_chain *ra, *new_ra, **rap;
194 if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW)
197 new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL;
199 write_lock_bh(&ip_ra_lock);
200 for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) {
203 write_unlock_bh(&ip_ra_lock);
208 write_unlock_bh(&ip_ra_lock);
217 if (new_ra == NULL) {
218 write_unlock_bh(&ip_ra_lock);
222 new_ra->destructor = destructor;
227 write_unlock_bh(&ip_ra_lock);
232 void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
233 u16 port, u32 info, u8 *payload)
235 struct inet_sock *inet = inet_sk(sk);
236 struct sock_exterr_skb *serr;
241 skb = skb_clone(skb, GFP_ATOMIC);
245 serr = SKB_EXT_ERR(skb);
246 serr->ee.ee_errno = err;
247 serr->ee.ee_origin = SO_EE_ORIGIN_ICMP;
248 serr->ee.ee_type = skb->h.icmph->type;
249 serr->ee.ee_code = skb->h.icmph->code;
251 serr->ee.ee_info = info;
252 serr->ee.ee_data = 0;
253 serr->addr_offset = (u8*)&(((struct iphdr*)(skb->h.icmph+1))->daddr) - skb->nh.raw;
256 skb->h.raw = payload;
257 if (!skb_pull(skb, payload - skb->data) ||
258 sock_queue_err_skb(sk, skb))
262 void ip_local_error(struct sock *sk, int err, u32 daddr, u16 port, u32 info)
264 struct inet_sock *inet = inet_sk(sk);
265 struct sock_exterr_skb *serr;
272 skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC);
276 iph = (struct iphdr*)skb_put(skb, sizeof(struct iphdr));
280 serr = SKB_EXT_ERR(skb);
281 serr->ee.ee_errno = err;
282 serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
283 serr->ee.ee_type = 0;
284 serr->ee.ee_code = 0;
286 serr->ee.ee_info = info;
287 serr->ee.ee_data = 0;
288 serr->addr_offset = (u8*)&iph->daddr - skb->nh.raw;
291 skb->h.raw = skb->tail;
292 __skb_pull(skb, skb->tail - skb->data);
294 if (sock_queue_err_skb(sk, skb))
299 * Handle MSG_ERRQUEUE
301 int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
303 struct sock_exterr_skb *serr;
304 struct sk_buff *skb, *skb2;
305 struct sockaddr_in *sin;
307 struct sock_extended_err ee;
308 struct sockaddr_in offender;
314 skb = skb_dequeue(&sk->sk_error_queue);
320 msg->msg_flags |= MSG_TRUNC;
323 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
327 sock_recv_timestamp(msg, sk, skb);
329 serr = SKB_EXT_ERR(skb);
331 sin = (struct sockaddr_in *)msg->msg_name;
333 sin->sin_family = AF_INET;
334 sin->sin_addr.s_addr = *(u32*)(skb->nh.raw + serr->addr_offset);
335 sin->sin_port = serr->port;
336 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
339 memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
340 sin = &errhdr.offender;
341 sin->sin_family = AF_UNSPEC;
342 if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) {
343 struct inet_sock *inet = inet_sk(sk);
345 sin->sin_family = AF_INET;
346 sin->sin_addr.s_addr = skb->nh.iph->saddr;
348 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
349 if (inet->cmsg_flags)
350 ip_cmsg_recv(msg, skb);
353 put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr);
355 /* Now we could try to dump offended packet options */
357 msg->msg_flags |= MSG_ERRQUEUE;
360 /* Reset and regenerate socket error */
361 spin_lock_bh(&sk->sk_error_queue.lock);
363 if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
364 sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
365 spin_unlock_bh(&sk->sk_error_queue.lock);
366 sk->sk_error_report(sk);
368 spin_unlock_bh(&sk->sk_error_queue.lock);
378 * Socket option code for IP. This is the end of the line after any TCP,UDP etc options on
382 int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen)
384 struct inet_sock *inet = inet_sk(sk);
390 if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
391 (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
392 (1<<IP_RETOPTS) | (1<<IP_TOS) |
393 (1<<IP_TTL) | (1<<IP_HDRINCL) |
394 (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
395 (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND))) ||
396 optname == IP_MULTICAST_TTL ||
397 optname == IP_MULTICAST_LOOP) {
398 if (optlen >= sizeof(int)) {
399 if (get_user(val, (int __user *) optval))
401 } else if (optlen >= sizeof(char)) {
404 if (get_user(ucval, (unsigned char __user *) optval))
410 /* If optlen==0, it is equivalent to val == 0 */
412 #ifdef CONFIG_IP_MROUTE
413 if (optname >= MRT_BASE && optname <= (MRT_BASE + 10))
414 return ip_mroute_setsockopt(sk,optname,optval,optlen);
423 struct ip_options * opt = NULL;
424 if (optlen > 40 || optlen < 0)
426 err = ip_options_get_from_user(&opt, optval, optlen);
430 struct inet_connection_sock *icsk = inet_csk(sk);
431 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
432 if (sk->sk_family == PF_INET ||
433 (!((1 << sk->sk_state) &
434 (TCPF_LISTEN | TCPF_CLOSE)) &&
435 inet->daddr != LOOPBACK4_IPV6)) {
438 icsk->icsk_ext_hdr_len -= inet->opt->optlen;
440 icsk->icsk_ext_hdr_len += opt->optlen;
441 icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
442 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
446 opt = xchg(&inet->opt, opt);
452 inet->cmsg_flags |= IP_CMSG_PKTINFO;
454 inet->cmsg_flags &= ~IP_CMSG_PKTINFO;
458 inet->cmsg_flags |= IP_CMSG_TTL;
460 inet->cmsg_flags &= ~IP_CMSG_TTL;
464 inet->cmsg_flags |= IP_CMSG_TOS;
466 inet->cmsg_flags &= ~IP_CMSG_TOS;
470 inet->cmsg_flags |= IP_CMSG_RECVOPTS;
472 inet->cmsg_flags &= ~IP_CMSG_RECVOPTS;
476 inet->cmsg_flags |= IP_CMSG_RETOPTS;
478 inet->cmsg_flags &= ~IP_CMSG_RETOPTS;
480 case IP_TOS: /* This sets both TOS and Precedence */
481 if (sk->sk_type == SOCK_STREAM) {
483 val |= inet->tos & 3;
485 if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP &&
486 !capable(CAP_NET_ADMIN)) {
490 if (inet->tos != val) {
492 sk->sk_priority = rt_tos2priority(val);
499 if (val != -1 && (val < 1 || val>255))
504 if (sk->sk_type != SOCK_RAW) {
508 inet->hdrincl = val ? 1 : 0;
510 case IP_MTU_DISCOVER:
513 inet->pmtudisc = val;
516 inet->recverr = !!val;
518 skb_queue_purge(&sk->sk_error_queue);
520 case IP_MULTICAST_TTL:
521 if (sk->sk_type == SOCK_STREAM)
527 if (val < 0 || val > 255)
531 case IP_MULTICAST_LOOP:
534 inet->mc_loop = !!val;
536 case IP_MULTICAST_IF:
538 struct ip_mreqn mreq;
539 struct net_device *dev = NULL;
541 if (sk->sk_type == SOCK_STREAM)
544 * Check the arguments are allowable
548 if (optlen >= sizeof(struct ip_mreqn)) {
549 if (copy_from_user(&mreq,optval,sizeof(mreq)))
552 memset(&mreq, 0, sizeof(mreq));
553 if (optlen >= sizeof(struct in_addr) &&
554 copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr)))
558 if (!mreq.imr_ifindex) {
559 if (mreq.imr_address.s_addr == INADDR_ANY) {
565 dev = ip_dev_find(mreq.imr_address.s_addr);
567 mreq.imr_ifindex = dev->ifindex;
571 dev = __dev_get_by_index(mreq.imr_ifindex);
574 err = -EADDRNOTAVAIL;
579 if (sk->sk_bound_dev_if &&
580 mreq.imr_ifindex != sk->sk_bound_dev_if)
583 inet->mc_index = mreq.imr_ifindex;
584 inet->mc_addr = mreq.imr_address.s_addr;
589 case IP_ADD_MEMBERSHIP:
590 case IP_DROP_MEMBERSHIP:
592 struct ip_mreqn mreq;
594 if (optlen < sizeof(struct ip_mreq))
597 if (optlen >= sizeof(struct ip_mreqn)) {
598 if(copy_from_user(&mreq,optval,sizeof(mreq)))
601 memset(&mreq, 0, sizeof(mreq));
602 if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq)))
606 if (optname == IP_ADD_MEMBERSHIP)
607 err = ip_mc_join_group(sk, &mreq);
609 err = ip_mc_leave_group(sk, &mreq);
614 extern int sysctl_igmp_max_msf;
615 struct ip_msfilter *msf;
617 if (optlen < IP_MSFILTER_SIZE(0))
619 if (optlen > sysctl_optmem_max) {
623 msf = (struct ip_msfilter *)kmalloc(optlen, GFP_KERNEL);
629 if (copy_from_user(msf, optval, optlen)) {
633 /* numsrc >= (1G-4) overflow in 32 bits */
634 if (msf->imsf_numsrc >= 0x3ffffffcU ||
635 msf->imsf_numsrc > sysctl_igmp_max_msf) {
640 if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) {
645 err = ip_mc_msfilter(sk, msf, 0);
649 case IP_BLOCK_SOURCE:
650 case IP_UNBLOCK_SOURCE:
651 case IP_ADD_SOURCE_MEMBERSHIP:
652 case IP_DROP_SOURCE_MEMBERSHIP:
654 struct ip_mreq_source mreqs;
657 if (optlen != sizeof(struct ip_mreq_source))
659 if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
663 if (optname == IP_BLOCK_SOURCE) {
664 omode = MCAST_EXCLUDE;
666 } else if (optname == IP_UNBLOCK_SOURCE) {
667 omode = MCAST_EXCLUDE;
669 } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) {
670 struct ip_mreqn mreq;
672 mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
673 mreq.imr_address.s_addr = mreqs.imr_interface;
674 mreq.imr_ifindex = 0;
675 err = ip_mc_join_group(sk, &mreq);
676 if (err && err != -EADDRINUSE)
678 omode = MCAST_INCLUDE;
680 } else /* IP_DROP_SOURCE_MEMBERSHIP */ {
681 omode = MCAST_INCLUDE;
684 err = ip_mc_source(add, omode, sk, &mreqs, 0);
687 case MCAST_JOIN_GROUP:
688 case MCAST_LEAVE_GROUP:
690 struct group_req greq;
691 struct sockaddr_in *psin;
692 struct ip_mreqn mreq;
694 if (optlen < sizeof(struct group_req))
697 if(copy_from_user(&greq, optval, sizeof(greq)))
699 psin = (struct sockaddr_in *)&greq.gr_group;
700 if (psin->sin_family != AF_INET)
702 memset(&mreq, 0, sizeof(mreq));
703 mreq.imr_multiaddr = psin->sin_addr;
704 mreq.imr_ifindex = greq.gr_interface;
706 if (optname == MCAST_JOIN_GROUP)
707 err = ip_mc_join_group(sk, &mreq);
709 err = ip_mc_leave_group(sk, &mreq);
712 case MCAST_JOIN_SOURCE_GROUP:
713 case MCAST_LEAVE_SOURCE_GROUP:
714 case MCAST_BLOCK_SOURCE:
715 case MCAST_UNBLOCK_SOURCE:
717 struct group_source_req greqs;
718 struct ip_mreq_source mreqs;
719 struct sockaddr_in *psin;
722 if (optlen != sizeof(struct group_source_req))
724 if (copy_from_user(&greqs, optval, sizeof(greqs))) {
728 if (greqs.gsr_group.ss_family != AF_INET ||
729 greqs.gsr_source.ss_family != AF_INET) {
730 err = -EADDRNOTAVAIL;
733 psin = (struct sockaddr_in *)&greqs.gsr_group;
734 mreqs.imr_multiaddr = psin->sin_addr.s_addr;
735 psin = (struct sockaddr_in *)&greqs.gsr_source;
736 mreqs.imr_sourceaddr = psin->sin_addr.s_addr;
737 mreqs.imr_interface = 0; /* use index for mc_source */
739 if (optname == MCAST_BLOCK_SOURCE) {
740 omode = MCAST_EXCLUDE;
742 } else if (optname == MCAST_UNBLOCK_SOURCE) {
743 omode = MCAST_EXCLUDE;
745 } else if (optname == MCAST_JOIN_SOURCE_GROUP) {
746 struct ip_mreqn mreq;
748 psin = (struct sockaddr_in *)&greqs.gsr_group;
749 mreq.imr_multiaddr = psin->sin_addr;
750 mreq.imr_address.s_addr = 0;
751 mreq.imr_ifindex = greqs.gsr_interface;
752 err = ip_mc_join_group(sk, &mreq);
753 if (err && err != -EADDRINUSE)
755 greqs.gsr_interface = mreq.imr_ifindex;
756 omode = MCAST_INCLUDE;
758 } else /* MCAST_LEAVE_SOURCE_GROUP */ {
759 omode = MCAST_INCLUDE;
762 err = ip_mc_source(add, omode, sk, &mreqs,
763 greqs.gsr_interface);
768 extern int sysctl_igmp_max_msf;
769 struct sockaddr_in *psin;
770 struct ip_msfilter *msf = NULL;
771 struct group_filter *gsf = NULL;
772 int msize, i, ifindex;
774 if (optlen < GROUP_FILTER_SIZE(0))
776 if (optlen > sysctl_optmem_max) {
780 gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL);
786 if (copy_from_user(gsf, optval, optlen)) {
789 /* numsrc >= (4G-140)/128 overflow in 32 bits */
790 if (gsf->gf_numsrc >= 0x1ffffff ||
791 gsf->gf_numsrc > sysctl_igmp_max_msf) {
795 if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
799 msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
800 msf = (struct ip_msfilter *)kmalloc(msize,GFP_KERNEL);
805 ifindex = gsf->gf_interface;
806 psin = (struct sockaddr_in *)&gsf->gf_group;
807 if (psin->sin_family != AF_INET) {
808 err = -EADDRNOTAVAIL;
811 msf->imsf_multiaddr = psin->sin_addr.s_addr;
812 msf->imsf_interface = 0;
813 msf->imsf_fmode = gsf->gf_fmode;
814 msf->imsf_numsrc = gsf->gf_numsrc;
815 err = -EADDRNOTAVAIL;
816 for (i=0; i<gsf->gf_numsrc; ++i) {
817 psin = (struct sockaddr_in *)&gsf->gf_slist[i];
819 if (psin->sin_family != AF_INET)
821 msf->imsf_slist[i] = psin->sin_addr.s_addr;
826 err = ip_mc_msfilter(sk, msf, ifindex);
832 case IP_ROUTER_ALERT:
833 err = ip_ra_control(sk, val ? 1 : 0, NULL);
839 inet->freebind = !!val;
842 case IP_IPSEC_POLICY:
845 if (!capable(CAP_NET_ADMIN))
847 err = xfrm_user_policy(sk, optname, optval, optlen);
851 #ifdef CONFIG_NETFILTER
852 err = nf_setsockopt(sk, PF_INET, optname, optval,
868 * Get the options. Note for future reference. The GET of IP options gets the
869 * _received_ ones. The set sets the _sent_ ones.
872 int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen)
874 struct inet_sock *inet = inet_sk(sk);
881 #ifdef CONFIG_IP_MROUTE
882 if(optname>=MRT_BASE && optname <=MRT_BASE+10)
884 return ip_mroute_getsockopt(sk,optname,optval,optlen);
888 if(get_user(len,optlen))
898 unsigned char optbuf[sizeof(struct ip_options)+40];
899 struct ip_options * opt = (struct ip_options*)optbuf;
902 memcpy(optbuf, inet->opt,
903 sizeof(struct ip_options)+
907 if (opt->optlen == 0)
908 return put_user(0, optlen);
910 ip_options_undo(opt);
912 len = min_t(unsigned int, len, opt->optlen);
913 if(put_user(len, optlen))
915 if(copy_to_user(optval, opt->__data, len))
920 val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0;
923 val = (inet->cmsg_flags & IP_CMSG_TTL) != 0;
926 val = (inet->cmsg_flags & IP_CMSG_TOS) != 0;
929 val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0;
932 val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0;
938 val = (inet->uc_ttl == -1 ?
939 sysctl_ip_default_ttl :
945 case IP_MTU_DISCOVER:
946 val = inet->pmtudisc;
950 struct dst_entry *dst;
952 dst = sk_dst_get(sk);
966 case IP_MULTICAST_TTL:
969 case IP_MULTICAST_LOOP:
972 case IP_MULTICAST_IF:
975 len = min_t(unsigned int, len, sizeof(struct in_addr));
976 addr.s_addr = inet->mc_addr;
979 if(put_user(len, optlen))
981 if(copy_to_user(optval, &addr, len))
987 struct ip_msfilter msf;
990 if (len < IP_MSFILTER_SIZE(0)) {
994 if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) {
998 err = ip_mc_msfget(sk, &msf,
999 (struct ip_msfilter __user *)optval, optlen);
1003 case MCAST_MSFILTER:
1005 struct group_filter gsf;
1008 if (len < GROUP_FILTER_SIZE(0)) {
1012 if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) {
1016 err = ip_mc_gsfget(sk, &gsf,
1017 (struct group_filter __user *)optval, optlen);
1027 if (sk->sk_type != SOCK_STREAM)
1028 return -ENOPROTOOPT;
1030 msg.msg_control = optval;
1031 msg.msg_controllen = len;
1034 if (inet->cmsg_flags & IP_CMSG_PKTINFO) {
1035 struct in_pktinfo info;
1037 info.ipi_addr.s_addr = inet->rcv_saddr;
1038 info.ipi_spec_dst.s_addr = inet->rcv_saddr;
1039 info.ipi_ifindex = inet->mc_index;
1040 put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info);
1042 if (inet->cmsg_flags & IP_CMSG_TTL) {
1043 int hlim = inet->mc_ttl;
1044 put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
1046 len -= msg.msg_controllen;
1047 return put_user(len, optlen);
1050 val = inet->freebind;
1053 #ifdef CONFIG_NETFILTER
1054 val = nf_getsockopt(sk, PF_INET, optname, optval,
1058 val = put_user(len, optlen);
1062 return -ENOPROTOOPT;
1067 if (len < sizeof(int) && len > 0 && val>=0 && val<255) {
1068 unsigned char ucval = (unsigned char)val;
1070 if(put_user(len, optlen))
1072 if(copy_to_user(optval,&ucval,1))
1075 len = min_t(unsigned int, sizeof(int), len);
1076 if(put_user(len, optlen))
1078 if(copy_to_user(optval,&val,len))
1084 EXPORT_SYMBOL(ip_cmsg_recv);
1086 EXPORT_SYMBOL(ip_getsockopt);
1087 EXPORT_SYMBOL(ip_setsockopt);