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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
29struct proto pingv6_prot = {
30 .name = "PINGv6",
31 .owner = THIS_MODULE,
32 .init = ping_init_sock,
33 .close = ping_close,
34 .connect = ip6_datagram_connect_v6_only,
35 .disconnect = udp_disconnect,
36 .setsockopt = ipv6_setsockopt,
37 .getsockopt = ipv6_getsockopt,
38 .sendmsg = ping_v6_sendmsg,
39 .recvmsg = ping_recvmsg,
40 .bind = ping_bind,
41 .backlog_rcv = ping_queue_rcv_skb,
42 .hash = ping_hash,
43 .unhash = ping_unhash,
44 .get_port = ping_get_port,
45 .obj_size = sizeof(struct raw6_sock),
46};
47EXPORT_SYMBOL_GPL(pingv6_prot);
48
49static struct inet_protosw pingv6_protosw = {
50 .type = SOCK_DGRAM,
51 .protocol = IPPROTO_ICMPV6,
52 .prot = &pingv6_prot,
53 .ops = &inet6_dgram_ops,
54 .flags = INET_PROTOSW_REUSE,
55};
56
57
58
59static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
60 int *addr_len)
61{
62 return -EAFNOSUPPORT;
63}
64static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
65 struct sk_buff *skb)
66{
67}
68static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
69{
70 return -EAFNOSUPPORT;
71}
72static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
73 __be16 port, u32 info, u8 *payload) {}
74static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
75 const struct net_device *dev, int strict)
76{
77 return 0;
78}
79
80int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
81{
82 struct inet_sock *inet = inet_sk(sk);
83 struct ipv6_pinfo *np = inet6_sk(sk);
84 struct icmp6hdr user_icmph;
85 int addr_type;
86 struct in6_addr *daddr;
87 int iif = 0;
88 struct flowi6 fl6;
89 int err;
90 int hlimit;
91 struct dst_entry *dst;
92 struct rt6_info *rt;
93 struct pingfakehdr pfh;
94
95 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
96
97 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
98 sizeof(user_icmph));
99 if (err)
100 return err;
101
102 if (msg->msg_name) {
103 DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name);
104 if (msg->msg_namelen < sizeof(*u))
105 return -EINVAL;
106 if (u->sin6_family != AF_INET6) {
107 return -EAFNOSUPPORT;
108 }
109 if (sk->sk_bound_dev_if &&
110 sk->sk_bound_dev_if != u->sin6_scope_id) {
111 return -EINVAL;
112 }
113 daddr = &(u->sin6_addr);
114 iif = u->sin6_scope_id;
115 } else {
116 if (sk->sk_state != TCP_ESTABLISHED)
117 return -EDESTADDRREQ;
118 daddr = &sk->sk_v6_daddr;
119 }
120
121 if (!iif)
122 iif = sk->sk_bound_dev_if;
123
124 addr_type = ipv6_addr_type(daddr);
125 if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
126 return -EINVAL;
127 if (addr_type & IPV6_ADDR_MAPPED)
128 return -EINVAL;
129
130
131
132 memset(&fl6, 0, sizeof(fl6));
133
134 fl6.flowi6_proto = IPPROTO_ICMPV6;
135 fl6.saddr = np->saddr;
136 fl6.daddr = *daddr;
137 fl6.flowi6_mark = sk->sk_mark;
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));
141
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;
146
147 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr);
148 if (IS_ERR(dst))
149 return PTR_ERR(dst);
150 rt = (struct rt6_info *) dst;
151
152 np = inet6_sk(sk);
153 if (!np)
154 return -EBADF;
155
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;
160
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.msg = msg;
167 pfh.wcheck = 0;
168 pfh.family = AF_INET6;
169
170 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
171
172 lock_sock(sk);
173 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
174 0, hlimit,
175 np->tclass, NULL, &fl6, rt,
176 MSG_DONTWAIT, np->dontfrag);
177
178 if (err) {
179 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
180 ICMP6_MIB_OUTERRORS);
181 ip6_flush_pending_frames(sk);
182 } else {
183 err = icmpv6_push_pending_frames(sk, &fl6,
184 (struct icmp6hdr *) &pfh.icmph,
185 len);
186 }
187 release_sock(sk);
188
189 if (err)
190 return err;
191
192 return len;
193}
194
195#ifdef CONFIG_PROC_FS
196static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
197{
198 return ping_seq_start(seq, pos, AF_INET6);
199}
200
201static int ping_v6_seq_show(struct seq_file *seq, void *v)
202{
203 if (v == SEQ_START_TOKEN) {
204 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
205 } else {
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);
211 }
212 return 0;
213}
214
215static struct ping_seq_afinfo ping_v6_seq_afinfo = {
216 .name = "icmp6",
217 .family = AF_INET6,
218 .seq_fops = &ping_seq_fops,
219 .seq_ops = {
220 .start = ping_v6_seq_start,
221 .show = ping_v6_seq_show,
222 .next = ping_seq_next,
223 .stop = ping_seq_stop,
224 },
225};
226
227static int __net_init ping_v6_proc_init_net(struct net *net)
228{
229 return ping_proc_register(net, &ping_v6_seq_afinfo);
230}
231
232static void __net_init ping_v6_proc_exit_net(struct net *net)
233{
234 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
235}
236
237static struct pernet_operations ping_v6_net_ops = {
238 .init = ping_v6_proc_init_net,
239 .exit = ping_v6_proc_exit_net,
240};
241#endif
242
243int __init pingv6_init(void)
244{
245#ifdef CONFIG_PROC_FS
246 int ret = register_pernet_subsys(&ping_v6_net_ops);
247 if (ret)
248 return ret;
249#endif
250 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
251 pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
252 pingv6_ops.ip6_datagram_recv_specific_ctl =
253 ip6_datagram_recv_specific_ctl;
254 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
255 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
256 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
257 return inet6_register_protosw(&pingv6_protosw);
258}
259
260
261
262
263void pingv6_exit(void)
264{
265 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
266 pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl;
267 pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;
268 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
269 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
270 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
271#ifdef CONFIG_PROC_FS
272 unregister_pernet_subsys(&ping_v6_net_ops);
273#endif
274 inet6_unregister_protosw(&pingv6_protosw);
275}
276
