~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/ipv6/af_inet6.c

Version: ~ [ linux-5.17-rc1 ] ~ [ linux-5.16.2 ] ~ [ linux-5.15.16 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.93 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.173 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.225 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.262 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.297 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.299 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  *      PF_INET6 socket protocol family
  4  *      Linux INET6 implementation
  5  *
  6  *      Authors:
  7  *      Pedro Roque             <roque@di.fc.ul.pt>
  8  *
  9  *      Adapted from linux/net/ipv4/af_inet.c
 10  *
 11  *      Fixes:
 12  *      piggy, Karl Knutson     :       Socket protocol table
 13  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
 14  *      Arnaldo Melo            :       check proc_net_create return, cleanups
 15  */
 16 
 17 #define pr_fmt(fmt) "IPv6: " fmt
 18 
 19 #include <linux/module.h>
 20 #include <linux/capability.h>
 21 #include <linux/errno.h>
 22 #include <linux/types.h>
 23 #include <linux/socket.h>
 24 #include <linux/in.h>
 25 #include <linux/kernel.h>
 26 #include <linux/timer.h>
 27 #include <linux/string.h>
 28 #include <linux/sockios.h>
 29 #include <linux/net.h>
 30 #include <linux/fcntl.h>
 31 #include <linux/mm.h>
 32 #include <linux/interrupt.h>
 33 #include <linux/proc_fs.h>
 34 #include <linux/stat.h>
 35 #include <linux/init.h>
 36 #include <linux/slab.h>
 37 
 38 #include <linux/inet.h>
 39 #include <linux/netdevice.h>
 40 #include <linux/icmpv6.h>
 41 #include <linux/netfilter_ipv6.h>
 42 
 43 #include <net/ip.h>
 44 #include <net/ipv6.h>
 45 #include <net/udp.h>
 46 #include <net/udplite.h>
 47 #include <net/tcp.h>
 48 #include <net/ping.h>
 49 #include <net/protocol.h>
 50 #include <net/inet_common.h>
 51 #include <net/route.h>
 52 #include <net/transp_v6.h>
 53 #include <net/ip6_route.h>
 54 #include <net/addrconf.h>
 55 #include <net/ipv6_stubs.h>
 56 #include <net/ndisc.h>
 57 #ifdef CONFIG_IPV6_TUNNEL
 58 #include <net/ip6_tunnel.h>
 59 #endif
 60 #include <net/calipso.h>
 61 #include <net/seg6.h>
 62 #include <net/rpl.h>
 63 #include <net/compat.h>
 64 #include <net/xfrm.h>
 65 
 66 #include <linux/uaccess.h>
 67 #include <linux/mroute6.h>
 68 
 69 #include "ip6_offload.h"
 70 
 71 MODULE_AUTHOR("Cast of dozens");
 72 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
 73 MODULE_LICENSE("GPL");
 74 
 75 /* The inetsw6 table contains everything that inet6_create needs to
 76  * build a new socket.
 77  */
 78 static struct list_head inetsw6[SOCK_MAX];
 79 static DEFINE_SPINLOCK(inetsw6_lock);
 80 
 81 struct ipv6_params ipv6_defaults = {
 82         .disable_ipv6 = 0,
 83         .autoconf = 1,
 84 };
 85 
 86 static int disable_ipv6_mod;
 87 
 88 module_param_named(disable, disable_ipv6_mod, int, 0444);
 89 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
 90 
 91 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
 92 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
 93 
 94 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
 95 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
 96 
 97 bool ipv6_mod_enabled(void)
 98 {
 99         return disable_ipv6_mod == 0;
100 }
101 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
102 
103 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
104 {
105         const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
106 
107         return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
108 }
109 
110 static int inet6_create(struct net *net, struct socket *sock, int protocol,
111                         int kern)
112 {
113         struct inet_sock *inet;
114         struct ipv6_pinfo *np;
115         struct sock *sk;
116         struct inet_protosw *answer;
117         struct proto *answer_prot;
118         unsigned char answer_flags;
119         int try_loading_module = 0;
120         int err;
121 
122         if (protocol < 0 || protocol >= IPPROTO_MAX)
123                 return -EINVAL;
124 
125         /* Look for the requested type/protocol pair. */
126 lookup_protocol:
127         err = -ESOCKTNOSUPPORT;
128         rcu_read_lock();
129         list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
130 
131                 err = 0;
132                 /* Check the non-wild match. */
133                 if (protocol == answer->protocol) {
134                         if (protocol != IPPROTO_IP)
135                                 break;
136                 } else {
137                         /* Check for the two wild cases. */
138                         if (IPPROTO_IP == protocol) {
139                                 protocol = answer->protocol;
140                                 break;
141                         }
142                         if (IPPROTO_IP == answer->protocol)
143                                 break;
144                 }
145                 err = -EPROTONOSUPPORT;
146         }
147 
148         if (err) {
149                 if (try_loading_module < 2) {
150                         rcu_read_unlock();
151                         /*
152                          * Be more specific, e.g. net-pf-10-proto-132-type-1
153                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
154                          */
155                         if (++try_loading_module == 1)
156                                 request_module("net-pf-%d-proto-%d-type-%d",
157                                                 PF_INET6, protocol, sock->type);
158                         /*
159                          * Fall back to generic, e.g. net-pf-10-proto-132
160                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
161                          */
162                         else
163                                 request_module("net-pf-%d-proto-%d",
164                                                 PF_INET6, protocol);
165                         goto lookup_protocol;
166                 } else
167                         goto out_rcu_unlock;
168         }
169 
170         err = -EPERM;
171         if (sock->type == SOCK_RAW && !kern &&
172             !ns_capable(net->user_ns, CAP_NET_RAW))
173                 goto out_rcu_unlock;
174 
175         sock->ops = answer->ops;
176         answer_prot = answer->prot;
177         answer_flags = answer->flags;
178         rcu_read_unlock();
179 
180         WARN_ON(!answer_prot->slab);
181 
182         err = -ENOBUFS;
183         sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
184         if (!sk)
185                 goto out;
186 
187         sock_init_data(sock, sk);
188 
189         err = 0;
190         if (INET_PROTOSW_REUSE & answer_flags)
191                 sk->sk_reuse = SK_CAN_REUSE;
192 
193         inet = inet_sk(sk);
194         inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
195 
196         if (SOCK_RAW == sock->type) {
197                 inet->inet_num = protocol;
198                 if (IPPROTO_RAW == protocol)
199                         inet->hdrincl = 1;
200         }
201 
202         sk->sk_destruct         = inet_sock_destruct;
203         sk->sk_family           = PF_INET6;
204         sk->sk_protocol         = protocol;
205 
206         sk->sk_backlog_rcv      = answer->prot->backlog_rcv;
207 
208         inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
209         np->hop_limit   = -1;
210         np->mcast_hops  = IPV6_DEFAULT_MCASTHOPS;
211         np->mc_loop     = 1;
212         np->mc_all      = 1;
213         np->pmtudisc    = IPV6_PMTUDISC_WANT;
214         np->repflow     = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
215         sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
216 
217         /* Init the ipv4 part of the socket since we can have sockets
218          * using v6 API for ipv4.
219          */
220         inet->uc_ttl    = -1;
221 
222         inet->mc_loop   = 1;
223         inet->mc_ttl    = 1;
224         inet->mc_index  = 0;
225         RCU_INIT_POINTER(inet->mc_list, NULL);
226         inet->rcv_tos   = 0;
227 
228         if (net->ipv4.sysctl_ip_no_pmtu_disc)
229                 inet->pmtudisc = IP_PMTUDISC_DONT;
230         else
231                 inet->pmtudisc = IP_PMTUDISC_WANT;
232         /*
233          * Increment only the relevant sk_prot->socks debug field, this changes
234          * the previous behaviour of incrementing both the equivalent to
235          * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
236          *
237          * This allows better debug granularity as we'll know exactly how many
238          * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
239          * transport protocol socks. -acme
240          */
241         sk_refcnt_debug_inc(sk);
242 
243         if (inet->inet_num) {
244                 /* It assumes that any protocol which allows
245                  * the user to assign a number at socket
246                  * creation time automatically shares.
247                  */
248                 inet->inet_sport = htons(inet->inet_num);
249                 err = sk->sk_prot->hash(sk);
250                 if (err) {
251                         sk_common_release(sk);
252                         goto out;
253                 }
254         }
255         if (sk->sk_prot->init) {
256                 err = sk->sk_prot->init(sk);
257                 if (err) {
258                         sk_common_release(sk);
259                         goto out;
260                 }
261         }
262 
263         if (!kern) {
264                 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
265                 if (err) {
266                         sk_common_release(sk);
267                         goto out;
268                 }
269         }
270 out:
271         return err;
272 out_rcu_unlock:
273         rcu_read_unlock();
274         goto out;
275 }
276 
277 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
278                         u32 flags)
279 {
280         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
281         struct inet_sock *inet = inet_sk(sk);
282         struct ipv6_pinfo *np = inet6_sk(sk);
283         struct net *net = sock_net(sk);
284         __be32 v4addr = 0;
285         unsigned short snum;
286         bool saved_ipv6only;
287         int addr_type = 0;
288         int err = 0;
289 
290         if (addr->sin6_family != AF_INET6)
291                 return -EAFNOSUPPORT;
292 
293         addr_type = ipv6_addr_type(&addr->sin6_addr);
294         if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
295                 return -EINVAL;
296 
297         snum = ntohs(addr->sin6_port);
298         if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
299             snum && inet_port_requires_bind_service(net, snum) &&
300             !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
301                 return -EACCES;
302 
303         if (flags & BIND_WITH_LOCK)
304                 lock_sock(sk);
305 
306         /* Check these errors (active socket, double bind). */
307         if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
308                 err = -EINVAL;
309                 goto out;
310         }
311 
312         /* Check if the address belongs to the host. */
313         if (addr_type == IPV6_ADDR_MAPPED) {
314                 struct net_device *dev = NULL;
315                 int chk_addr_ret;
316 
317                 /* Binding to v4-mapped address on a v6-only socket
318                  * makes no sense
319                  */
320                 if (sk->sk_ipv6only) {
321                         err = -EINVAL;
322                         goto out;
323                 }
324 
325                 rcu_read_lock();
326                 if (sk->sk_bound_dev_if) {
327                         dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
328                         if (!dev) {
329                                 err = -ENODEV;
330                                 goto out_unlock;
331                         }
332                 }
333 
334                 /* Reproduce AF_INET checks to make the bindings consistent */
335                 v4addr = addr->sin6_addr.s6_addr32[3];
336                 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
337                 rcu_read_unlock();
338 
339                 if (!inet_can_nonlocal_bind(net, inet) &&
340                     v4addr != htonl(INADDR_ANY) &&
341                     chk_addr_ret != RTN_LOCAL &&
342                     chk_addr_ret != RTN_MULTICAST &&
343                     chk_addr_ret != RTN_BROADCAST) {
344                         err = -EADDRNOTAVAIL;
345                         goto out;
346                 }
347         } else {
348                 if (addr_type != IPV6_ADDR_ANY) {
349                         struct net_device *dev = NULL;
350 
351                         rcu_read_lock();
352                         if (__ipv6_addr_needs_scope_id(addr_type)) {
353                                 if (addr_len >= sizeof(struct sockaddr_in6) &&
354                                     addr->sin6_scope_id) {
355                                         /* Override any existing binding, if another one
356                                          * is supplied by user.
357                                          */
358                                         sk->sk_bound_dev_if = addr->sin6_scope_id;
359                                 }
360 
361                                 /* Binding to link-local address requires an interface */
362                                 if (!sk->sk_bound_dev_if) {
363                                         err = -EINVAL;
364                                         goto out_unlock;
365                                 }
366                         }
367 
368                         if (sk->sk_bound_dev_if) {
369                                 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
370                                 if (!dev) {
371                                         err = -ENODEV;
372                                         goto out_unlock;
373                                 }
374                         }
375 
376                         /* ipv4 addr of the socket is invalid.  Only the
377                          * unspecified and mapped address have a v4 equivalent.
378                          */
379                         v4addr = LOOPBACK4_IPV6;
380                         if (!(addr_type & IPV6_ADDR_MULTICAST)) {
381                                 if (!ipv6_can_nonlocal_bind(net, inet) &&
382                                     !ipv6_chk_addr(net, &addr->sin6_addr,
383                                                    dev, 0)) {
384                                         err = -EADDRNOTAVAIL;
385                                         goto out_unlock;
386                                 }
387                         }
388                         rcu_read_unlock();
389                 }
390         }
391 
392         inet->inet_rcv_saddr = v4addr;
393         inet->inet_saddr = v4addr;
394 
395         sk->sk_v6_rcv_saddr = addr->sin6_addr;
396 
397         if (!(addr_type & IPV6_ADDR_MULTICAST))
398                 np->saddr = addr->sin6_addr;
399 
400         saved_ipv6only = sk->sk_ipv6only;
401         if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
402                 sk->sk_ipv6only = 1;
403 
404         /* Make sure we are allowed to bind here. */
405         if (snum || !(inet->bind_address_no_port ||
406                       (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
407                 if (sk->sk_prot->get_port(sk, snum)) {
408                         sk->sk_ipv6only = saved_ipv6only;
409                         inet_reset_saddr(sk);
410                         err = -EADDRINUSE;
411                         goto out;
412                 }
413                 if (!(flags & BIND_FROM_BPF)) {
414                         err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
415                         if (err) {
416                                 sk->sk_ipv6only = saved_ipv6only;
417                                 inet_reset_saddr(sk);
418                                 goto out;
419                         }
420                 }
421         }
422 
423         if (addr_type != IPV6_ADDR_ANY)
424                 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
425         if (snum)
426                 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
427         inet->inet_sport = htons(inet->inet_num);
428         inet->inet_dport = 0;
429         inet->inet_daddr = 0;
430 out:
431         if (flags & BIND_WITH_LOCK)
432                 release_sock(sk);
433         return err;
434 out_unlock:
435         rcu_read_unlock();
436         goto out;
437 }
438 
439 /* bind for INET6 API */
440 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
441 {
442         struct sock *sk = sock->sk;
443         u32 flags = BIND_WITH_LOCK;
444         int err = 0;
445 
446         /* If the socket has its own bind function then use it. */
447         if (sk->sk_prot->bind)
448                 return sk->sk_prot->bind(sk, uaddr, addr_len);
449 
450         if (addr_len < SIN6_LEN_RFC2133)
451                 return -EINVAL;
452 
453         /* BPF prog is run before any checks are done so that if the prog
454          * changes context in a wrong way it will be caught.
455          */
456         err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr,
457                                                  BPF_CGROUP_INET6_BIND, &flags);
458         if (err)
459                 return err;
460 
461         return __inet6_bind(sk, uaddr, addr_len, flags);
462 }
463 EXPORT_SYMBOL(inet6_bind);
464 
465 int inet6_release(struct socket *sock)
466 {
467         struct sock *sk = sock->sk;
468 
469         if (!sk)
470                 return -EINVAL;
471 
472         /* Free mc lists */
473         ipv6_sock_mc_close(sk);
474 
475         /* Free ac lists */
476         ipv6_sock_ac_close(sk);
477 
478         return inet_release(sock);
479 }
480 EXPORT_SYMBOL(inet6_release);
481 
482 void inet6_destroy_sock(struct sock *sk)
483 {
484         struct ipv6_pinfo *np = inet6_sk(sk);
485         struct sk_buff *skb;
486         struct ipv6_txoptions *opt;
487 
488         /* Release rx options */
489 
490         skb = xchg(&np->pktoptions, NULL);
491         kfree_skb(skb);
492 
493         skb = xchg(&np->rxpmtu, NULL);
494         kfree_skb(skb);
495 
496         /* Free flowlabels */
497         fl6_free_socklist(sk);
498 
499         /* Free tx options */
500 
501         opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
502         if (opt) {
503                 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
504                 txopt_put(opt);
505         }
506 }
507 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
508 
509 /*
510  *      This does both peername and sockname.
511  */
512 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
513                   int peer)
514 {
515         struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
516         struct sock *sk = sock->sk;
517         struct inet_sock *inet = inet_sk(sk);
518         struct ipv6_pinfo *np = inet6_sk(sk);
519 
520         sin->sin6_family = AF_INET6;
521         sin->sin6_flowinfo = 0;
522         sin->sin6_scope_id = 0;
523         if (peer) {
524                 if (!inet->inet_dport)
525                         return -ENOTCONN;
526                 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
527                     peer == 1)
528                         return -ENOTCONN;
529                 sin->sin6_port = inet->inet_dport;
530                 sin->sin6_addr = sk->sk_v6_daddr;
531                 if (np->sndflow)
532                         sin->sin6_flowinfo = np->flow_label;
533                 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
534                                             BPF_CGROUP_INET6_GETPEERNAME,
535                                             NULL);
536         } else {
537                 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
538                         sin->sin6_addr = np->saddr;
539                 else
540                         sin->sin6_addr = sk->sk_v6_rcv_saddr;
541                 sin->sin6_port = inet->inet_sport;
542                 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
543                                             BPF_CGROUP_INET6_GETSOCKNAME,
544                                             NULL);
545         }
546         sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
547                                                  sk->sk_bound_dev_if);
548         return sizeof(*sin);
549 }
550 EXPORT_SYMBOL(inet6_getname);
551 
552 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
553 {
554         void __user *argp = (void __user *)arg;
555         struct sock *sk = sock->sk;
556         struct net *net = sock_net(sk);
557 
558         switch (cmd) {
559         case SIOCADDRT:
560         case SIOCDELRT: {
561                 struct in6_rtmsg rtmsg;
562 
563                 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
564                         return -EFAULT;
565                 return ipv6_route_ioctl(net, cmd, &rtmsg);
566         }
567         case SIOCSIFADDR:
568                 return addrconf_add_ifaddr(net, argp);
569         case SIOCDIFADDR:
570                 return addrconf_del_ifaddr(net, argp);
571         case SIOCSIFDSTADDR:
572                 return addrconf_set_dstaddr(net, argp);
573         default:
574                 if (!sk->sk_prot->ioctl)
575                         return -ENOIOCTLCMD;
576                 return sk->sk_prot->ioctl(sk, cmd, arg);
577         }
578         /*NOTREACHED*/
579         return 0;
580 }
581 EXPORT_SYMBOL(inet6_ioctl);
582 
583 #ifdef CONFIG_COMPAT
584 struct compat_in6_rtmsg {
585         struct in6_addr         rtmsg_dst;
586         struct in6_addr         rtmsg_src;
587         struct in6_addr         rtmsg_gateway;
588         u32                     rtmsg_type;
589         u16                     rtmsg_dst_len;
590         u16                     rtmsg_src_len;
591         u32                     rtmsg_metric;
592         u32                     rtmsg_info;
593         u32                     rtmsg_flags;
594         s32                     rtmsg_ifindex;
595 };
596 
597 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
598                 struct compat_in6_rtmsg __user *ur)
599 {
600         struct in6_rtmsg rt;
601 
602         if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
603                         3 * sizeof(struct in6_addr)) ||
604             get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
605             get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
606             get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
607             get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
608             get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
609             get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
610             get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
611                 return -EFAULT;
612 
613 
614         return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
615 }
616 
617 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
618 {
619         void __user *argp = compat_ptr(arg);
620         struct sock *sk = sock->sk;
621 
622         switch (cmd) {
623         case SIOCADDRT:
624         case SIOCDELRT:
625                 return inet6_compat_routing_ioctl(sk, cmd, argp);
626         default:
627                 return -ENOIOCTLCMD;
628         }
629 }
630 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
631 #endif /* CONFIG_COMPAT */
632 
633 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
634                                             size_t));
635 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
636 {
637         struct sock *sk = sock->sk;
638 
639         if (unlikely(inet_send_prepare(sk)))
640                 return -EAGAIN;
641 
642         return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
643                                sk, msg, size);
644 }
645 
646 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
647                                             size_t, int, int, int *));
648 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
649                   int flags)
650 {
651         struct sock *sk = sock->sk;
652         int addr_len = 0;
653         int err;
654 
655         if (likely(!(flags & MSG_ERRQUEUE)))
656                 sock_rps_record_flow(sk);
657 
658         err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
659                               sk, msg, size, flags & MSG_DONTWAIT,
660                               flags & ~MSG_DONTWAIT, &addr_len);
661         if (err >= 0)
662                 msg->msg_namelen = addr_len;
663         return err;
664 }
665 
666 const struct proto_ops inet6_stream_ops = {
667         .family            = PF_INET6,
668         .owner             = THIS_MODULE,
669         .release           = inet6_release,
670         .bind              = inet6_bind,
671         .connect           = inet_stream_connect,       /* ok           */
672         .socketpair        = sock_no_socketpair,        /* a do nothing */
673         .accept            = inet_accept,               /* ok           */
674         .getname           = inet6_getname,
675         .poll              = tcp_poll,                  /* ok           */
676         .ioctl             = inet6_ioctl,               /* must change  */
677         .gettstamp         = sock_gettstamp,
678         .listen            = inet_listen,               /* ok           */
679         .shutdown          = inet_shutdown,             /* ok           */
680         .setsockopt        = sock_common_setsockopt,    /* ok           */
681         .getsockopt        = sock_common_getsockopt,    /* ok           */
682         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
683         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
684 #ifdef CONFIG_MMU
685         .mmap              = tcp_mmap,
686 #endif
687         .sendpage          = inet_sendpage,
688         .sendmsg_locked    = tcp_sendmsg_locked,
689         .sendpage_locked   = tcp_sendpage_locked,
690         .splice_read       = tcp_splice_read,
691         .read_sock         = tcp_read_sock,
692         .peek_len          = tcp_peek_len,
693 #ifdef CONFIG_COMPAT
694         .compat_ioctl      = inet6_compat_ioctl,
695 #endif
696         .set_rcvlowat      = tcp_set_rcvlowat,
697 };
698 
699 const struct proto_ops inet6_dgram_ops = {
700         .family            = PF_INET6,
701         .owner             = THIS_MODULE,
702         .release           = inet6_release,
703         .bind              = inet6_bind,
704         .connect           = inet_dgram_connect,        /* ok           */
705         .socketpair        = sock_no_socketpair,        /* a do nothing */
706         .accept            = sock_no_accept,            /* a do nothing */
707         .getname           = inet6_getname,
708         .poll              = udp_poll,                  /* ok           */
709         .ioctl             = inet6_ioctl,               /* must change  */
710         .gettstamp         = sock_gettstamp,
711         .listen            = sock_no_listen,            /* ok           */
712         .shutdown          = inet_shutdown,             /* ok           */
713         .setsockopt        = sock_common_setsockopt,    /* ok           */
714         .getsockopt        = sock_common_getsockopt,    /* ok           */
715         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
716         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
717         .read_sock         = udp_read_sock,
718         .mmap              = sock_no_mmap,
719         .sendpage          = sock_no_sendpage,
720         .set_peek_off      = sk_set_peek_off,
721 #ifdef CONFIG_COMPAT
722         .compat_ioctl      = inet6_compat_ioctl,
723 #endif
724 };
725 
726 static const struct net_proto_family inet6_family_ops = {
727         .family = PF_INET6,
728         .create = inet6_create,
729         .owner  = THIS_MODULE,
730 };
731 
732 int inet6_register_protosw(struct inet_protosw *p)
733 {
734         struct list_head *lh;
735         struct inet_protosw *answer;
736         struct list_head *last_perm;
737         int protocol = p->protocol;
738         int ret;
739 
740         spin_lock_bh(&inetsw6_lock);
741 
742         ret = -EINVAL;
743         if (p->type >= SOCK_MAX)
744                 goto out_illegal;
745 
746         /* If we are trying to override a permanent protocol, bail. */
747         answer = NULL;
748         ret = -EPERM;
749         last_perm = &inetsw6[p->type];
750         list_for_each(lh, &inetsw6[p->type]) {
751                 answer = list_entry(lh, struct inet_protosw, list);
752 
753                 /* Check only the non-wild match. */
754                 if (INET_PROTOSW_PERMANENT & answer->flags) {
755                         if (protocol == answer->protocol)
756                                 break;
757                         last_perm = lh;
758                 }
759 
760                 answer = NULL;
761         }
762         if (answer)
763                 goto out_permanent;
764 
765         /* Add the new entry after the last permanent entry if any, so that
766          * the new entry does not override a permanent entry when matched with
767          * a wild-card protocol. But it is allowed to override any existing
768          * non-permanent entry.  This means that when we remove this entry, the
769          * system automatically returns to the old behavior.
770          */
771         list_add_rcu(&p->list, last_perm);
772         ret = 0;
773 out:
774         spin_unlock_bh(&inetsw6_lock);
775         return ret;
776 
777 out_permanent:
778         pr_err("Attempt to override permanent protocol %d\n", protocol);
779         goto out;
780 
781 out_illegal:
782         pr_err("Ignoring attempt to register invalid socket type %d\n",
783                p->type);
784         goto out;
785 }
786 EXPORT_SYMBOL(inet6_register_protosw);
787 
788 void
789 inet6_unregister_protosw(struct inet_protosw *p)
790 {
791         if (INET_PROTOSW_PERMANENT & p->flags) {
792                 pr_err("Attempt to unregister permanent protocol %d\n",
793                        p->protocol);
794         } else {
795                 spin_lock_bh(&inetsw6_lock);
796                 list_del_rcu(&p->list);
797                 spin_unlock_bh(&inetsw6_lock);
798 
799                 synchronize_net();
800         }
801 }
802 EXPORT_SYMBOL(inet6_unregister_protosw);
803 
804 int inet6_sk_rebuild_header(struct sock *sk)
805 {
806         struct ipv6_pinfo *np = inet6_sk(sk);
807         struct dst_entry *dst;
808 
809         dst = __sk_dst_check(sk, np->dst_cookie);
810 
811         if (!dst) {
812                 struct inet_sock *inet = inet_sk(sk);
813                 struct in6_addr *final_p, final;
814                 struct flowi6 fl6;
815 
816                 memset(&fl6, 0, sizeof(fl6));
817                 fl6.flowi6_proto = sk->sk_protocol;
818                 fl6.daddr = sk->sk_v6_daddr;
819                 fl6.saddr = np->saddr;
820                 fl6.flowlabel = np->flow_label;
821                 fl6.flowi6_oif = sk->sk_bound_dev_if;
822                 fl6.flowi6_mark = sk->sk_mark;
823                 fl6.fl6_dport = inet->inet_dport;
824                 fl6.fl6_sport = inet->inet_sport;
825                 fl6.flowi6_uid = sk->sk_uid;
826                 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
827 
828                 rcu_read_lock();
829                 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
830                                          &final);
831                 rcu_read_unlock();
832 
833                 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
834                 if (IS_ERR(dst)) {
835                         sk->sk_route_caps = 0;
836                         sk->sk_err_soft = -PTR_ERR(dst);
837                         return PTR_ERR(dst);
838                 }
839 
840                 ip6_dst_store(sk, dst, NULL, NULL);
841         }
842 
843         return 0;
844 }
845 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
846 
847 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
848                        const struct inet6_skb_parm *opt)
849 {
850         const struct ipv6_pinfo *np = inet6_sk(sk);
851 
852         if (np->rxopt.all) {
853                 if (((opt->flags & IP6SKB_HOPBYHOP) &&
854                      (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
855                     (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
856                      np->rxopt.bits.rxflow) ||
857                     (opt->srcrt && (np->rxopt.bits.srcrt ||
858                      np->rxopt.bits.osrcrt)) ||
859                     ((opt->dst1 || opt->dst0) &&
860                      (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
861                         return true;
862         }
863         return false;
864 }
865 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
866 
867 static struct packet_type ipv6_packet_type __read_mostly = {
868         .type = cpu_to_be16(ETH_P_IPV6),
869         .func = ipv6_rcv,
870         .list_func = ipv6_list_rcv,
871 };
872 
873 static int __init ipv6_packet_init(void)
874 {
875         dev_add_pack(&ipv6_packet_type);
876         return 0;
877 }
878 
879 static void ipv6_packet_cleanup(void)
880 {
881         dev_remove_pack(&ipv6_packet_type);
882 }
883 
884 static int __net_init ipv6_init_mibs(struct net *net)
885 {
886         int i;
887 
888         net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
889         if (!net->mib.udp_stats_in6)
890                 return -ENOMEM;
891         net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
892         if (!net->mib.udplite_stats_in6)
893                 goto err_udplite_mib;
894         net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
895         if (!net->mib.ipv6_statistics)
896                 goto err_ip_mib;
897 
898         for_each_possible_cpu(i) {
899                 struct ipstats_mib *af_inet6_stats;
900                 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
901                 u64_stats_init(&af_inet6_stats->syncp);
902         }
903 
904 
905         net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
906         if (!net->mib.icmpv6_statistics)
907                 goto err_icmp_mib;
908         net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
909                                                 GFP_KERNEL);
910         if (!net->mib.icmpv6msg_statistics)
911                 goto err_icmpmsg_mib;
912         return 0;
913 
914 err_icmpmsg_mib:
915         free_percpu(net->mib.icmpv6_statistics);
916 err_icmp_mib:
917         free_percpu(net->mib.ipv6_statistics);
918 err_ip_mib:
919         free_percpu(net->mib.udplite_stats_in6);
920 err_udplite_mib:
921         free_percpu(net->mib.udp_stats_in6);
922         return -ENOMEM;
923 }
924 
925 static void ipv6_cleanup_mibs(struct net *net)
926 {
927         free_percpu(net->mib.udp_stats_in6);
928         free_percpu(net->mib.udplite_stats_in6);
929         free_percpu(net->mib.ipv6_statistics);
930         free_percpu(net->mib.icmpv6_statistics);
931         kfree(net->mib.icmpv6msg_statistics);
932 }
933 
934 static int __net_init inet6_net_init(struct net *net)
935 {
936         int err = 0;
937 
938         net->ipv6.sysctl.bindv6only = 0;
939         net->ipv6.sysctl.icmpv6_time = 1*HZ;
940         net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
941         net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
942         net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
943 
944         /* By default, rate limit error messages.
945          * Except for pmtu discovery, it would break it.
946          * proc_do_large_bitmap needs pointer to the bitmap.
947          */
948         bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
949         bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
950         net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
951 
952         net->ipv6.sysctl.flowlabel_consistency = 1;
953         net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
954         net->ipv6.sysctl.idgen_retries = 3;
955         net->ipv6.sysctl.idgen_delay = 1 * HZ;
956         net->ipv6.sysctl.flowlabel_state_ranges = 0;
957         net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
958         net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
959         net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
960         net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
961         net->ipv6.sysctl.fib_notify_on_flag_change = 0;
962         atomic_set(&net->ipv6.fib6_sernum, 1);
963 
964         err = ipv6_init_mibs(net);
965         if (err)
966                 return err;
967 #ifdef CONFIG_PROC_FS
968         err = udp6_proc_init(net);
969         if (err)
970                 goto out;
971         err = tcp6_proc_init(net);
972         if (err)
973                 goto proc_tcp6_fail;
974         err = ac6_proc_init(net);
975         if (err)
976                 goto proc_ac6_fail;
977 #endif
978         return err;
979 
980 #ifdef CONFIG_PROC_FS
981 proc_ac6_fail:
982         tcp6_proc_exit(net);
983 proc_tcp6_fail:
984         udp6_proc_exit(net);
985 out:
986         ipv6_cleanup_mibs(net);
987         return err;
988 #endif
989 }
990 
991 static void __net_exit inet6_net_exit(struct net *net)
992 {
993 #ifdef CONFIG_PROC_FS
994         udp6_proc_exit(net);
995         tcp6_proc_exit(net);
996         ac6_proc_exit(net);
997 #endif
998         ipv6_cleanup_mibs(net);
999 }
1000 
1001 static struct pernet_operations inet6_net_ops = {
1002         .init = inet6_net_init,
1003         .exit = inet6_net_exit,
1004 };
1005 
1006 static int ipv6_route_input(struct sk_buff *skb)
1007 {
1008         ip6_route_input(skb);
1009         return skb_dst(skb)->error;
1010 }
1011 
1012 static const struct ipv6_stub ipv6_stub_impl = {
1013         .ipv6_sock_mc_join = ipv6_sock_mc_join,
1014         .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1015         .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1016         .ipv6_route_input  = ipv6_route_input,
1017         .fib6_get_table    = fib6_get_table,
1018         .fib6_table_lookup = fib6_table_lookup,
1019         .fib6_lookup       = fib6_lookup,
1020         .fib6_select_path  = fib6_select_path,
1021         .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1022         .fib6_nh_init      = fib6_nh_init,
1023         .fib6_nh_release   = fib6_nh_release,
1024         .fib6_update_sernum = fib6_update_sernum_stub,
1025         .fib6_rt_update    = fib6_rt_update,
1026         .ip6_del_rt        = ip6_del_rt,
1027         .udpv6_encap_enable = udpv6_encap_enable,
1028         .ndisc_send_na = ndisc_send_na,
1029 #if IS_ENABLED(CONFIG_XFRM)
1030         .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1031         .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1032         .xfrm6_rcv_encap = xfrm6_rcv_encap,
1033 #endif
1034         .nd_tbl = &nd_tbl,
1035         .ipv6_fragment = ip6_fragment,
1036         .ipv6_dev_find = ipv6_dev_find,
1037 };
1038 
1039 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1040         .inet6_bind = __inet6_bind,
1041         .udp6_lib_lookup = __udp6_lib_lookup,
1042 };
1043 
1044 static int __init inet6_init(void)
1045 {
1046         struct list_head *r;
1047         int err = 0;
1048 
1049         sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1050 
1051         /* Register the socket-side information for inet6_create.  */
1052         for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1053                 INIT_LIST_HEAD(r);
1054 
1055         if (disable_ipv6_mod) {
1056                 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1057                 goto out;
1058         }
1059 
1060         err = proto_register(&tcpv6_prot, 1);
1061         if (err)
1062                 goto out;
1063 
1064         err = proto_register(&udpv6_prot, 1);
1065         if (err)
1066                 goto out_unregister_tcp_proto;
1067 
1068         err = proto_register(&udplitev6_prot, 1);
1069         if (err)
1070                 goto out_unregister_udp_proto;
1071 
1072         err = proto_register(&rawv6_prot, 1);
1073         if (err)
1074                 goto out_unregister_udplite_proto;
1075 
1076         err = proto_register(&pingv6_prot, 1);
1077         if (err)
1078                 goto out_unregister_raw_proto;
1079 
1080         /* We MUST register RAW sockets before we create the ICMP6,
1081          * IGMP6, or NDISC control sockets.
1082          */
1083         err = rawv6_init();
1084         if (err)
1085                 goto out_unregister_ping_proto;
1086 
1087         /* Register the family here so that the init calls below will
1088          * be able to create sockets. (?? is this dangerous ??)
1089          */
1090         err = sock_register(&inet6_family_ops);
1091         if (err)
1092                 goto out_sock_register_fail;
1093 
1094         /*
1095          *      ipngwg API draft makes clear that the correct semantics
1096          *      for TCP and UDP is to consider one TCP and UDP instance
1097          *      in a host available by both INET and INET6 APIs and
1098          *      able to communicate via both network protocols.
1099          */
1100 
1101         err = register_pernet_subsys(&inet6_net_ops);
1102         if (err)
1103                 goto register_pernet_fail;
1104         err = ip6_mr_init();
1105         if (err)
1106                 goto ipmr_fail;
1107         err = icmpv6_init();
1108         if (err)
1109                 goto icmp_fail;
1110         err = ndisc_init();
1111         if (err)
1112                 goto ndisc_fail;
1113         err = igmp6_init();
1114         if (err)
1115                 goto igmp_fail;
1116 
1117         err = ipv6_netfilter_init();
1118         if (err)
1119                 goto netfilter_fail;
1120         /* Create /proc/foo6 entries. */
1121 #ifdef CONFIG_PROC_FS
1122         err = -ENOMEM;
1123         if (raw6_proc_init())
1124                 goto proc_raw6_fail;
1125         if (udplite6_proc_init())
1126                 goto proc_udplite6_fail;
1127         if (ipv6_misc_proc_init())
1128                 goto proc_misc6_fail;
1129         if (if6_proc_init())
1130                 goto proc_if6_fail;
1131 #endif
1132         err = ip6_route_init();
1133         if (err)
1134                 goto ip6_route_fail;
1135         err = ndisc_late_init();
1136         if (err)
1137                 goto ndisc_late_fail;
1138         err = ip6_flowlabel_init();
1139         if (err)
1140                 goto ip6_flowlabel_fail;
1141         err = ipv6_anycast_init();
1142         if (err)
1143                 goto ipv6_anycast_fail;
1144         err = addrconf_init();
1145         if (err)
1146                 goto addrconf_fail;
1147 
1148         /* Init v6 extension headers. */
1149         err = ipv6_exthdrs_init();
1150         if (err)
1151                 goto ipv6_exthdrs_fail;
1152 
1153         err = ipv6_frag_init();
1154         if (err)
1155                 goto ipv6_frag_fail;
1156 
1157         /* Init v6 transport protocols. */
1158         err = udpv6_init();
1159         if (err)
1160                 goto udpv6_fail;
1161 
1162         err = udplitev6_init();
1163         if (err)
1164                 goto udplitev6_fail;
1165 
1166         err = udpv6_offload_init();
1167         if (err)
1168                 goto udpv6_offload_fail;
1169 
1170         err = tcpv6_init();
1171         if (err)
1172                 goto tcpv6_fail;
1173 
1174         err = ipv6_packet_init();
1175         if (err)
1176                 goto ipv6_packet_fail;
1177 
1178         err = pingv6_init();
1179         if (err)
1180                 goto pingv6_fail;
1181 
1182         err = calipso_init();
1183         if (err)
1184                 goto calipso_fail;
1185 
1186         err = seg6_init();
1187         if (err)
1188                 goto seg6_fail;
1189 
1190         err = rpl_init();
1191         if (err)
1192                 goto rpl_fail;
1193 
1194         err = igmp6_late_init();
1195         if (err)
1196                 goto igmp6_late_err;
1197 
1198 #ifdef CONFIG_SYSCTL
1199         err = ipv6_sysctl_register();
1200         if (err)
1201                 goto sysctl_fail;
1202 #endif
1203 
1204         /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1205         wmb();
1206         ipv6_stub = &ipv6_stub_impl;
1207         ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1208 out:
1209         return err;
1210 
1211 #ifdef CONFIG_SYSCTL
1212 sysctl_fail:
1213         igmp6_late_cleanup();
1214 #endif
1215 igmp6_late_err:
1216         rpl_exit();
1217 rpl_fail:
1218         seg6_exit();
1219 seg6_fail:
1220         calipso_exit();
1221 calipso_fail:
1222         pingv6_exit();
1223 pingv6_fail:
1224         ipv6_packet_cleanup();
1225 ipv6_packet_fail:
1226         tcpv6_exit();
1227 tcpv6_fail:
1228         udpv6_offload_exit();
1229 udpv6_offload_fail:
1230         udplitev6_exit();
1231 udplitev6_fail:
1232         udpv6_exit();
1233 udpv6_fail:
1234         ipv6_frag_exit();
1235 ipv6_frag_fail:
1236         ipv6_exthdrs_exit();
1237 ipv6_exthdrs_fail:
1238         addrconf_cleanup();
1239 addrconf_fail:
1240         ipv6_anycast_cleanup();
1241 ipv6_anycast_fail:
1242         ip6_flowlabel_cleanup();
1243 ip6_flowlabel_fail:
1244         ndisc_late_cleanup();
1245 ndisc_late_fail:
1246         ip6_route_cleanup();
1247 ip6_route_fail:
1248 #ifdef CONFIG_PROC_FS
1249         if6_proc_exit();
1250 proc_if6_fail:
1251         ipv6_misc_proc_exit();
1252 proc_misc6_fail:
1253         udplite6_proc_exit();
1254 proc_udplite6_fail:
1255         raw6_proc_exit();
1256 proc_raw6_fail:
1257 #endif
1258         ipv6_netfilter_fini();
1259 netfilter_fail:
1260         igmp6_cleanup();
1261 igmp_fail:
1262         ndisc_cleanup();
1263 ndisc_fail:
1264         icmpv6_cleanup();
1265 icmp_fail:
1266         ip6_mr_cleanup();
1267 ipmr_fail:
1268         unregister_pernet_subsys(&inet6_net_ops);
1269 register_pernet_fail:
1270         sock_unregister(PF_INET6);
1271         rtnl_unregister_all(PF_INET6);
1272 out_sock_register_fail:
1273         rawv6_exit();
1274 out_unregister_ping_proto:
1275         proto_unregister(&pingv6_prot);
1276 out_unregister_raw_proto:
1277         proto_unregister(&rawv6_prot);
1278 out_unregister_udplite_proto:
1279         proto_unregister(&udplitev6_prot);
1280 out_unregister_udp_proto:
1281         proto_unregister(&udpv6_prot);
1282 out_unregister_tcp_proto:
1283         proto_unregister(&tcpv6_prot);
1284         goto out;
1285 }
1286 module_init(inet6_init);
1287 
1288 MODULE_ALIAS_NETPROTO(PF_INET6);
1289 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp