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 __init pingv6_init(void)
83 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
84 pingv6_ops.ip6_datagram_recv_ctl = ip6_datagram_recv_ctl;
85 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
86 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
87 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
88 return inet6_register_protosw(&pingv6_protosw);
91 /* This never gets called because it's not possible to unload the ipv6 module,
94 void pingv6_exit(void)
96 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
97 pingv6_ops.ip6_datagram_recv_ctl = dummy_ip6_datagram_recv_ctl;
98 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
99 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
100 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
101 inet6_unregister_protosw(&pingv6_protosw);
104 int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
107 struct inet_sock *inet = inet_sk(sk);
108 struct ipv6_pinfo *np = inet6_sk(sk);
109 struct icmp6hdr user_icmph;
111 struct in6_addr *daddr;
116 struct dst_entry *dst;
118 struct pingfakehdr pfh;
120 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
122 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
128 struct sockaddr_in6 *u = (struct sockaddr_in6 *) msg->msg_name;
129 if (msg->msg_namelen < sizeof(struct sockaddr_in6) ||
130 u->sin6_family != AF_INET6) {
133 if (sk->sk_bound_dev_if &&
134 sk->sk_bound_dev_if != u->sin6_scope_id) {
137 daddr = &(u->sin6_addr);
138 iif = u->sin6_scope_id;
140 if (sk->sk_state != TCP_ESTABLISHED)
141 return -EDESTADDRREQ;
146 iif = sk->sk_bound_dev_if;
148 addr_type = ipv6_addr_type(daddr);
149 if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
151 if (addr_type & IPV6_ADDR_MAPPED)
154 /* TODO: use ip6_datagram_send_ctl to get options from cmsg */
156 memset(&fl6, 0, sizeof(fl6));
158 fl6.flowi6_proto = IPPROTO_ICMPV6;
159 fl6.saddr = np->saddr;
161 fl6.flowi6_mark = sk->sk_mark;
162 fl6.fl6_icmp_type = user_icmph.icmp6_type;
163 fl6.fl6_icmp_code = user_icmph.icmp6_code;
164 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
166 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
167 fl6.flowi6_oif = np->mcast_oif;
168 else if (!fl6.flowi6_oif)
169 fl6.flowi6_oif = np->ucast_oif;
171 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, 1);
174 rt = (struct rt6_info *) dst;
180 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
181 fl6.flowi6_oif = np->mcast_oif;
182 else if (!fl6.flowi6_oif)
183 fl6.flowi6_oif = np->ucast_oif;
185 pfh.icmph.type = user_icmph.icmp6_type;
186 pfh.icmph.code = user_icmph.icmp6_code;
187 pfh.icmph.checksum = 0;
188 pfh.icmph.un.echo.id = inet->inet_sport;
189 pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
190 pfh.iov = msg->msg_iov;
192 pfh.family = AF_INET6;
194 if (ipv6_addr_is_multicast(&fl6.daddr))
195 hlimit = np->mcast_hops;
197 hlimit = np->hop_limit;
199 hlimit = ip6_dst_hoplimit(dst);
202 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
204 np->tclass, NULL, &fl6, rt,
205 MSG_DONTWAIT, np->dontfrag);
208 ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev,
209 ICMP6_MIB_OUTERRORS);
210 ip6_flush_pending_frames(sk);
212 err = icmpv6_push_pending_frames(sk, &fl6,
213 (struct icmp6hdr *) &pfh.icmph,