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 * 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.
13 * Based on ipv4/ping.c code.
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)
21 #include <net/addrconf.h>
23 #include <net/ip6_route.h>
24 #include <net/protocol.h>
26 #include <net/transp_v6.h>
29 struct proto pingv6_prot = {
32 .init = ping_init_sock,
34 .connect = ip6_datagram_connect,
35 .disconnect = udp_disconnect,
36 .setsockopt = ipv6_setsockopt,
37 .getsockopt = ipv6_getsockopt,
38 .sendmsg = ping_v6_sendmsg,
39 .recvmsg = ping_recvmsg,
41 .backlog_rcv = ping_queue_rcv_skb,
43 .unhash = ping_unhash,
44 .get_port = ping_get_port,
45 .obj_size = sizeof(struct raw6_sock),
47 EXPORT_SYMBOL_GPL(pingv6_prot);
49 static struct inet_protosw pingv6_protosw = {
51 .protocol = IPPROTO_ICMPV6,
53 .ops = &inet6_dgram_ops,
54 .no_check = UDP_CSUM_DEFAULT,
55 .flags = INET_PROTOSW_REUSE,
59 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
60 int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
64 int dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
69 int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
73 void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
74 __be16 port, u32 info, u8 *payload) {}
75 int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
76 const struct net_device *dev, int strict)
81 int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
84 struct inet_sock *inet = inet_sk(sk);
85 struct ipv6_pinfo *np = inet6_sk(sk);
86 struct icmp6hdr user_icmph;
88 struct in6_addr *daddr;
93 struct dst_entry *dst;
95 struct pingfakehdr pfh;
97 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
99 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
105 struct sockaddr_in6 *u = (struct sockaddr_in6 *) msg->msg_name;
106 if (msg->msg_namelen < sizeof(struct sockaddr_in6) ||
107 u->sin6_family != AF_INET6) {
110 if (sk->sk_bound_dev_if &&
111 sk->sk_bound_dev_if != u->sin6_scope_id) {
114 daddr = &(u->sin6_addr);
115 iif = u->sin6_scope_id;
117 if (sk->sk_state != TCP_ESTABLISHED)
118 return -EDESTADDRREQ;
123 iif = sk->sk_bound_dev_if;
125 addr_type = ipv6_addr_type(daddr);
126 if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
128 if (addr_type & IPV6_ADDR_MAPPED)
131 /* TODO: use ip6_datagram_send_ctl to get options from cmsg */
133 memset(&fl6, 0, sizeof(fl6));
135 fl6.flowi6_proto = IPPROTO_ICMPV6;
136 fl6.saddr = np->saddr;
138 fl6.fl6_icmp_type = user_icmph.icmp6_type;
139 fl6.fl6_icmp_code = user_icmph.icmp6_code;
140 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
142 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
143 fl6.flowi6_oif = np->mcast_oif;
144 else if (!fl6.flowi6_oif)
145 fl6.flowi6_oif = np->ucast_oif;
147 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, 1);
150 rt = (struct rt6_info *) dst;
156 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
157 fl6.flowi6_oif = np->mcast_oif;
158 else if (!fl6.flowi6_oif)
159 fl6.flowi6_oif = np->ucast_oif;
161 pfh.icmph.type = user_icmph.icmp6_type;
162 pfh.icmph.code = user_icmph.icmp6_code;
163 pfh.icmph.checksum = 0;
164 pfh.icmph.un.echo.id = inet->inet_sport;
165 pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
166 pfh.iov = msg->msg_iov;
168 pfh.family = AF_INET6;
170 if (ipv6_addr_is_multicast(&fl6.daddr))
171 hlimit = np->mcast_hops;
173 hlimit = np->hop_limit;
175 hlimit = ip6_dst_hoplimit(dst);
177 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
179 np->tclass, NULL, &fl6, rt,
180 MSG_DONTWAIT, np->dontfrag);
183 ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev,
184 ICMP6_MIB_OUTERRORS);
185 ip6_flush_pending_frames(sk);
187 err = icmpv6_push_pending_frames(sk, &fl6,
188 (struct icmp6hdr *) &pfh.icmph,
195 #ifdef CONFIG_PROC_FS
196 static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
198 return ping_seq_start(seq, pos, AF_INET6);
201 int ping_v6_seq_show(struct seq_file *seq, void *v)
203 if (v == SEQ_START_TOKEN) {
204 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
206 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
207 struct inet_sock *inet = inet_sk(v);
208 __u16 srcp = ntohs(inet->inet_sport);
209 __u16 destp = ntohs(inet->inet_dport);
210 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
215 static struct ping_seq_afinfo ping_v6_seq_afinfo = {
218 .seq_fops = &ping_seq_fops,
220 .start = ping_v6_seq_start,
221 .show = ping_v6_seq_show,
222 .next = ping_seq_next,
223 .stop = ping_seq_stop,
227 static int __net_init ping_v6_proc_init_net(struct net *net)
229 return ping_proc_register(net, &ping_v6_seq_afinfo);
232 static void __net_init ping_v6_proc_exit_net(struct net *net)
234 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
237 static struct pernet_operations ping_v6_net_ops = {
238 .init = ping_v6_proc_init_net,
239 .exit = ping_v6_proc_exit_net,
243 int __init pingv6_init(void)
245 #ifdef CONFIG_PROC_FS
246 int ret = register_pernet_subsys(&ping_v6_net_ops);
250 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
251 pingv6_ops.ip6_datagram_recv_ctl = ip6_datagram_recv_ctl;
252 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
253 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
254 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
255 return inet6_register_protosw(&pingv6_protosw);
258 /* This never gets called because it's not possible to unload the ipv6 module,
261 void pingv6_exit(void)
263 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
264 pingv6_ops.ip6_datagram_recv_ctl = dummy_ip6_datagram_recv_ctl;
265 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
266 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
267 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
268 #ifdef CONFIG_PROC_FS
269 unregister_pernet_subsys(&ping_v6_net_ops);
271 inet6_unregister_protosw(&pingv6_protosw);