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

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

Version: ~ [ linux-5.4-rc3 ] ~ [ linux-5.3.6 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.79 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.149 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.196 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.196 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.75 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ 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 /*
  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  *              "Ping" sockets
  7  *
  8  *              This program is free software; you can redistribute it and/or
  9  *              modify it under the terms of the GNU General Public License
 10  *              as published by the Free Software Foundation; either version
 11  *              2 of the License, or (at your option) any later version.
 12  *
 13  * Based on ipv4/ping.c code.
 14  *
 15  * Authors:     Lorenzo Colitti (IPv6 support)
 16  *              Vasiliy Kulikov / Openwall (IPv4 implementation, for Linux 2.6),
 17  *              Pavel Kankovsky (IPv4 implementation, for Linux 2.4.32)
 18  *
 19  */
 20 
 21 #include <net/addrconf.h>
 22 #include <net/ipv6.h>
 23 #include <net/ip6_route.h>
 24 #include <net/protocol.h>
 25 #include <net/udp.h>
 26 #include <net/transp_v6.h>
 27 #include <net/ping.h>
 28 
 29 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
 30 static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
 31                                  int *addr_len)
 32 {
 33         return -EAFNOSUPPORT;
 34 }
 35 static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
 36                                        struct sk_buff *skb)
 37 {
 38 }
 39 static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
 40 {
 41         return -EAFNOSUPPORT;
 42 }
 43 static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
 44                                   __be16 port, u32 info, u8 *payload) {}
 45 static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
 46                                const struct net_device *dev, int strict)
 47 {
 48         return 0;
 49 }
 50 
 51 static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 52 {
 53         struct inet_sock *inet = inet_sk(sk);
 54         struct ipv6_pinfo *np = inet6_sk(sk);
 55         struct icmp6hdr user_icmph;
 56         int addr_type;
 57         struct in6_addr *daddr;
 58         int oif = 0;
 59         struct flowi6 fl6;
 60         int err;
 61         struct dst_entry *dst;
 62         struct rt6_info *rt;
 63         struct pingfakehdr pfh;
 64         struct sockcm_cookie junk = {0};
 65         struct ipcm6_cookie ipc6;
 66 
 67         pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
 68 
 69         err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
 70                                   sizeof(user_icmph));
 71         if (err)
 72                 return err;
 73 
 74         if (msg->msg_name) {
 75                 DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name);
 76                 if (msg->msg_namelen < sizeof(*u))
 77                         return -EINVAL;
 78                 if (u->sin6_family != AF_INET6) {
 79                         return -EAFNOSUPPORT;
 80                 }
 81                 daddr = &(u->sin6_addr);
 82                 if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr)))
 83                         oif = u->sin6_scope_id;
 84         } else {
 85                 if (sk->sk_state != TCP_ESTABLISHED)
 86                         return -EDESTADDRREQ;
 87                 daddr = &sk->sk_v6_daddr;
 88         }
 89 
 90         if (!oif)
 91                 oif = sk->sk_bound_dev_if;
 92 
 93         if (!oif)
 94                 oif = np->sticky_pktinfo.ipi6_ifindex;
 95 
 96         if (!oif && ipv6_addr_is_multicast(daddr))
 97                 oif = np->mcast_oif;
 98         else if (!oif)
 99                 oif = np->ucast_oif;
100 
101         addr_type = ipv6_addr_type(daddr);
102         if ((__ipv6_addr_needs_scope_id(addr_type) && !oif) ||
103             (addr_type & IPV6_ADDR_MAPPED) ||
104             (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if))
105                 return -EINVAL;
106 
107         /* TODO: use ip6_datagram_send_ctl to get options from cmsg */
108 
109         memset(&fl6, 0, sizeof(fl6));
110 
111         fl6.flowi6_proto = IPPROTO_ICMPV6;
112         fl6.saddr = np->saddr;
113         fl6.daddr = *daddr;
114         fl6.flowi6_oif = oif;
115         fl6.flowi6_mark = sk->sk_mark;
116         fl6.flowi6_uid = sk->sk_uid;
117         fl6.fl6_icmp_type = user_icmph.icmp6_type;
118         fl6.fl6_icmp_code = user_icmph.icmp6_code;
119         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
120 
121         ipc6.tclass = np->tclass;
122         fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
123 
124         dst = ip6_sk_dst_lookup_flow(sk, &fl6,  daddr);
125         if (IS_ERR(dst))
126                 return PTR_ERR(dst);
127         rt = (struct rt6_info *) dst;
128 
129         if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
130                 fl6.flowi6_oif = np->mcast_oif;
131         else if (!fl6.flowi6_oif)
132                 fl6.flowi6_oif = np->ucast_oif;
133 
134         pfh.icmph.type = user_icmph.icmp6_type;
135         pfh.icmph.code = user_icmph.icmp6_code;
136         pfh.icmph.checksum = 0;
137         pfh.icmph.un.echo.id = inet->inet_sport;
138         pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
139         pfh.msg = msg;
140         pfh.wcheck = 0;
141         pfh.family = AF_INET6;
142 
143         ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
144         ipc6.dontfrag = np->dontfrag;
145         ipc6.opt = NULL;
146 
147         lock_sock(sk);
148         err = ip6_append_data(sk, ping_getfrag, &pfh, len,
149                               0, &ipc6, &fl6, rt,
150                               MSG_DONTWAIT, &junk);
151 
152         if (err) {
153                 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
154                                 ICMP6_MIB_OUTERRORS);
155                 ip6_flush_pending_frames(sk);
156         } else {
157                 icmpv6_push_pending_frames(sk, &fl6,
158                                            (struct icmp6hdr *)&pfh.icmph, len);
159         }
160         release_sock(sk);
161 
162         dst_release(dst);
163 
164         if (err)
165                 return err;
166 
167         return len;
168 }
169 
170 struct proto pingv6_prot = {
171         .name =         "PINGv6",
172         .owner =        THIS_MODULE,
173         .init =         ping_init_sock,
174         .close =        ping_close,
175         .connect =      ip6_datagram_connect_v6_only,
176         .disconnect =   __udp_disconnect,
177         .setsockopt =   ipv6_setsockopt,
178         .getsockopt =   ipv6_getsockopt,
179         .sendmsg =      ping_v6_sendmsg,
180         .recvmsg =      ping_recvmsg,
181         .bind =         ping_bind,
182         .backlog_rcv =  ping_queue_rcv_skb,
183         .hash =         ping_hash,
184         .unhash =       ping_unhash,
185         .get_port =     ping_get_port,
186         .obj_size =     sizeof(struct raw6_sock),
187 };
188 EXPORT_SYMBOL_GPL(pingv6_prot);
189 
190 static struct inet_protosw pingv6_protosw = {
191         .type =      SOCK_DGRAM,
192         .protocol =  IPPROTO_ICMPV6,
193         .prot =      &pingv6_prot,
194         .ops =       &inet6_sockraw_ops,
195         .flags =     INET_PROTOSW_REUSE,
196 };
197 
198 #ifdef CONFIG_PROC_FS
199 static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
200 {
201         return ping_seq_start(seq, pos, AF_INET6);
202 }
203 
204 static int ping_v6_seq_show(struct seq_file *seq, void *v)
205 {
206         if (v == SEQ_START_TOKEN) {
207                 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
208         } else {
209                 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
210                 struct inet_sock *inet = inet_sk(v);
211                 __u16 srcp = ntohs(inet->inet_sport);
212                 __u16 destp = ntohs(inet->inet_dport);
213                 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
214         }
215         return 0;
216 }
217 
218 static struct ping_seq_afinfo ping_v6_seq_afinfo = {
219         .name           = "icmp6",
220         .family         = AF_INET6,
221         .seq_fops       = &ping_seq_fops,
222         .seq_ops        = {
223                 .start          = ping_v6_seq_start,
224                 .show           = ping_v6_seq_show,
225                 .next           = ping_seq_next,
226                 .stop           = ping_seq_stop,
227         },
228 };
229 
230 static int __net_init ping_v6_proc_init_net(struct net *net)
231 {
232         return ping_proc_register(net, &ping_v6_seq_afinfo);
233 }
234 
235 static void __net_init ping_v6_proc_exit_net(struct net *net)
236 {
237         return ping_proc_unregister(net, &ping_v6_seq_afinfo);
238 }
239 
240 static struct pernet_operations ping_v6_net_ops = {
241         .init = ping_v6_proc_init_net,
242         .exit = ping_v6_proc_exit_net,
243 };
244 #endif
245 
246 int __init pingv6_init(void)
247 {
248 #ifdef CONFIG_PROC_FS
249         int ret = register_pernet_subsys(&ping_v6_net_ops);
250         if (ret)
251                 return ret;
252 #endif
253         pingv6_ops.ipv6_recv_error = ipv6_recv_error;
254         pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
255         pingv6_ops.ip6_datagram_recv_specific_ctl =
256                 ip6_datagram_recv_specific_ctl;
257         pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
258         pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
259         pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
260         return inet6_register_protosw(&pingv6_protosw);
261 }
262 
263 /* This never gets called because it's not possible to unload the ipv6 module,
264  * but just in case.
265  */
266 void pingv6_exit(void)
267 {
268         pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
269         pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl;
270         pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;
271         pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
272         pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
273         pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
274 #ifdef CONFIG_PROC_FS
275         unregister_pernet_subsys(&ping_v6_net_ops);
276 #endif
277         inet6_unregister_protosw(&pingv6_protosw);
278 }
279 

~ [ 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