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 static void ping_v6_destroy(struct sock *sk)
31 inet6_destroy_sock(sk);
34 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
35 static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
40 static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
44 static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
48 static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
49 __be16 port, u32 info, u8 *payload) {}
50 static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
51 const struct net_device *dev, int strict)
56 static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
58 struct inet_sock *inet = inet_sk(sk);
59 struct ipv6_pinfo *np = inet6_sk(sk);
60 struct icmp6hdr user_icmph;
62 struct in6_addr *daddr;
66 struct dst_entry *dst;
68 struct pingfakehdr pfh;
69 struct sockcm_cookie junk = {0};
70 struct ipcm6_cookie ipc6;
72 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
74 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
80 DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name);
81 if (msg->msg_namelen < sizeof(*u))
83 if (u->sin6_family != AF_INET6) {
86 daddr = &(u->sin6_addr);
87 if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr)))
88 oif = u->sin6_scope_id;
90 if (sk->sk_state != TCP_ESTABLISHED)
92 daddr = &sk->sk_v6_daddr;
96 oif = sk->sk_bound_dev_if;
99 oif = np->sticky_pktinfo.ipi6_ifindex;
101 if (!oif && ipv6_addr_is_multicast(daddr))
106 addr_type = ipv6_addr_type(daddr);
107 if ((__ipv6_addr_needs_scope_id(addr_type) && !oif) ||
108 (addr_type & IPV6_ADDR_MAPPED) ||
109 (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if))
112 /* TODO: use ip6_datagram_send_ctl to get options from cmsg */
114 memset(&fl6, 0, sizeof(fl6));
116 fl6.flowi6_proto = IPPROTO_ICMPV6;
117 fl6.saddr = np->saddr;
119 fl6.flowi6_oif = oif;
120 fl6.flowi6_mark = sk->sk_mark;
121 fl6.fl6_icmp_type = user_icmph.icmp6_type;
122 fl6.fl6_icmp_code = user_icmph.icmp6_code;
123 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
125 ipc6.tclass = np->tclass;
126 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
128 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr);
131 rt = (struct rt6_info *) dst;
139 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
140 fl6.flowi6_oif = np->mcast_oif;
141 else if (!fl6.flowi6_oif)
142 fl6.flowi6_oif = np->ucast_oif;
144 pfh.icmph.type = user_icmph.icmp6_type;
145 pfh.icmph.code = user_icmph.icmp6_code;
146 pfh.icmph.checksum = 0;
147 pfh.icmph.un.echo.id = inet->inet_sport;
148 pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
151 pfh.family = AF_INET6;
153 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
154 ipc6.dontfrag = np->dontfrag;
158 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
160 MSG_DONTWAIT, &junk);
163 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
164 ICMP6_MIB_OUTERRORS);
165 ip6_flush_pending_frames(sk);
167 err = icmpv6_push_pending_frames(sk, &fl6,
168 (struct icmp6hdr *) &pfh.icmph,
182 struct proto pingv6_prot = {
184 .owner = THIS_MODULE,
185 .init = ping_init_sock,
187 .destroy = ping_v6_destroy,
188 .connect = ip6_datagram_connect_v6_only,
189 .disconnect = __udp_disconnect,
190 .setsockopt = ipv6_setsockopt,
191 .getsockopt = ipv6_getsockopt,
192 .sendmsg = ping_v6_sendmsg,
193 .recvmsg = ping_recvmsg,
195 .backlog_rcv = ping_queue_rcv_skb,
197 .unhash = ping_unhash,
198 .get_port = ping_get_port,
199 .obj_size = sizeof(struct raw6_sock),
201 EXPORT_SYMBOL_GPL(pingv6_prot);
203 static struct inet_protosw pingv6_protosw = {
205 .protocol = IPPROTO_ICMPV6,
206 .prot = &pingv6_prot,
207 .ops = &inet6_sockraw_ops,
208 .flags = INET_PROTOSW_REUSE,
211 #ifdef CONFIG_PROC_FS
212 static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
214 return ping_seq_start(seq, pos, AF_INET6);
217 static int ping_v6_seq_show(struct seq_file *seq, void *v)
219 if (v == SEQ_START_TOKEN) {
220 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
222 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
223 struct inet_sock *inet = inet_sk(v);
224 __u16 srcp = ntohs(inet->inet_sport);
225 __u16 destp = ntohs(inet->inet_dport);
226 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
231 static struct ping_seq_afinfo ping_v6_seq_afinfo = {
234 .seq_fops = &ping_seq_fops,
236 .start = ping_v6_seq_start,
237 .show = ping_v6_seq_show,
238 .next = ping_seq_next,
239 .stop = ping_seq_stop,
243 static int __net_init ping_v6_proc_init_net(struct net *net)
245 return ping_proc_register(net, &ping_v6_seq_afinfo);
248 static void __net_exit ping_v6_proc_exit_net(struct net *net)
250 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
253 static struct pernet_operations ping_v6_net_ops = {
254 .init = ping_v6_proc_init_net,
255 .exit = ping_v6_proc_exit_net,
259 int __init pingv6_init(void)
261 #ifdef CONFIG_PROC_FS
262 int ret = register_pernet_subsys(&ping_v6_net_ops);
266 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
267 pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
268 pingv6_ops.ip6_datagram_recv_specific_ctl =
269 ip6_datagram_recv_specific_ctl;
270 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
271 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
272 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
273 return inet6_register_protosw(&pingv6_protosw);
276 /* This never gets called because it's not possible to unload the ipv6 module,
279 void pingv6_exit(void)
281 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
282 pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl;
283 pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;
284 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
285 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
286 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
287 #ifdef CONFIG_PROC_FS
288 unregister_pernet_subsys(&ping_v6_net_ops);
290 inet6_unregister_protosw(&pingv6_protosw);