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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,
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 .no_check = UDP_CSUM_DEFAULT,
55 .flags = INET_PROTOSW_REUSE,
56};
57
58
59
60static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
61{
62 return -EAFNOSUPPORT;
63}
64static int dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
65 struct sk_buff *skb)
66{
67 return -EAFNOSUPPORT;
68}
69static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
70{
71 return -EAFNOSUPPORT;
72}
73static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
74 __be16 port, u32 info, u8 *payload) {}
75static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
76 const struct net_device *dev, int strict)
77{
78 return 0;
79}
80
81int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
82 size_t len)
83{
84 struct inet_sock *inet = inet_sk(sk);
85 struct ipv6_pinfo *np = inet6_sk(sk);
86 struct icmp6hdr user_icmph;
87 int addr_type;
88 struct in6_addr *daddr;
89 int iif = 0;
90 struct flowi6 fl6;
91 int err;
92 int hlimit;
93 struct dst_entry *dst;
94 struct rt6_info *rt;
95 struct pingfakehdr pfh;
96
97 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
98
99 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
100 sizeof(user_icmph));
101 if (err)
102 return err;
103
104 if (msg->msg_name) {
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) {
108 return -EINVAL;
109 }
110 if (sk->sk_bound_dev_if &&
111 sk->sk_bound_dev_if != u->sin6_scope_id) {
112 return -EINVAL;
113 }
114 daddr = &(u->sin6_addr);
115 iif = u->sin6_scope_id;
116 } else {
117 if (sk->sk_state != TCP_ESTABLISHED)
118 return -EDESTADDRREQ;
119 daddr = &np->daddr;
120 }
121
122 if (!iif)
123 iif = sk->sk_bound_dev_if;
124
125 addr_type = ipv6_addr_type(daddr);
126 if (__ipv6_addr_needs_scope_id(addr_type) && !iif)
127 return -EINVAL;
128 if (addr_type & IPV6_ADDR_MAPPED)
129 return -EINVAL;
130
131
132
133 memset(&fl6, 0, sizeof(fl6));
134
135 fl6.flowi6_proto = IPPROTO_ICMPV6;
136 fl6.saddr = np->saddr;
137 fl6.daddr = *daddr;
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, 1);
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.iov = msg->msg_iov;
167 pfh.wcheck = 0;
168 pfh.family = AF_INET6;
169
170 if (ipv6_addr_is_multicast(&fl6.daddr))
171 hlimit = np->mcast_hops;
172 else
173 hlimit = np->hop_limit;
174 if (hlimit < 0)
175 hlimit = ip6_dst_hoplimit(dst);
176
177 lock_sock(sk);
178 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
179 0, hlimit,
180 np->tclass, NULL, &fl6, rt,
181 MSG_DONTWAIT, np->dontfrag);
182
183 if (err) {
184 ICMP6_INC_STATS_BH(sock_net(sk), rt->rt6i_idev,
185 ICMP6_MIB_OUTERRORS);
186 ip6_flush_pending_frames(sk);
187 } else {
188 err = icmpv6_push_pending_frames(sk, &fl6,
189 (struct icmp6hdr *) &pfh.icmph,
190 len);
191 }
192 release_sock(sk);
193
194 if (err)
195 return err;
196
197 return len;
198}
199
200#ifdef CONFIG_PROC_FS
201static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
202{
203 return ping_seq_start(seq, pos, AF_INET6);
204}
205
206static int ping_v6_seq_show(struct seq_file *seq, void *v)
207{
208 if (v == SEQ_START_TOKEN) {
209 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
210 } else {
211 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
212 struct inet_sock *inet = inet_sk(v);
213 __u16 srcp = ntohs(inet->inet_sport);
214 __u16 destp = ntohs(inet->inet_dport);
215 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
216 }
217 return 0;
218}
219
220static struct ping_seq_afinfo ping_v6_seq_afinfo = {
221 .name = "icmp6",
222 .family = AF_INET6,
223 .seq_fops = &ping_seq_fops,
224 .seq_ops = {
225 .start = ping_v6_seq_start,
226 .show = ping_v6_seq_show,
227 .next = ping_seq_next,
228 .stop = ping_seq_stop,
229 },
230};
231
232static int __net_init ping_v6_proc_init_net(struct net *net)
233{
234 return ping_proc_register(net, &ping_v6_seq_afinfo);
235}
236
237static void __net_init ping_v6_proc_exit_net(struct net *net)
238{
239 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
240}
241
242static struct pernet_operations ping_v6_net_ops = {
243 .init = ping_v6_proc_init_net,
244 .exit = ping_v6_proc_exit_net,
245};
246#endif
247
248int __init pingv6_init(void)
249{
250#ifdef CONFIG_PROC_FS
251 int ret = register_pernet_subsys(&ping_v6_net_ops);
252 if (ret)
253 return ret;
254#endif
255 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
256 pingv6_ops.ip6_datagram_recv_ctl = ip6_datagram_recv_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
264
265
266void pingv6_exit(void)
267{
268 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
269 pingv6_ops.ip6_datagram_recv_ctl = dummy_ip6_datagram_recv_ctl;
270 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
271 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
272 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
273#ifdef CONFIG_PROC_FS
274 unregister_pernet_subsys(&ping_v6_net_ops);
275#endif
276 inet6_unregister_protosw(&pingv6_protosw);
277}
278
