Commit | Line | Data |
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6d0bfe22 LC |
1 | /* |
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. | |
5 | * | |
6 | * "Ping" sockets | |
7 | * | |
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. | |
12 | * | |
13 | * Based on ipv4/ping.c code. | |
14 | * | |
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) | |
18 | * | |
19 | */ | |
20 | ||
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 | ||
6d0bfe22 | 29 | /* Compatibility glue so we can support IPv6 when it's compiled as a module */ |
85fbaa75 HFS |
30 | static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, |
31 | int *addr_len) | |
6d0bfe22 LC |
32 | { |
33 | return -EAFNOSUPPORT; | |
34 | } | |
4b261c75 | 35 | static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, |
a06a2d37 | 36 | struct sk_buff *skb) |
6d0bfe22 | 37 | { |
6d0bfe22 | 38 | } |
a06a2d37 | 39 | static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err) |
6d0bfe22 LC |
40 | { |
41 | return -EAFNOSUPPORT; | |
42 | } | |
a06a2d37 WF |
43 | static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
44 | __be16 port, u32 info, u8 *payload) {} | |
45 | static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr, | |
46 | const struct net_device *dev, int strict) | |
6d0bfe22 LC |
47 | { |
48 | return 0; | |
49 | } | |
50 | ||
6579a023 | 51 | static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
6d0bfe22 LC |
52 | { |
53 | struct inet_sock *inet = inet_sk(sk); | |
54 | struct ipv6_pinfo *np = inet6_sk(sk); | |
55 | struct icmp6hdr user_icmph; | |
56 | int addr_type; | |
57 | struct in6_addr *daddr; | |
5e457896 | 58 | int oif = 0; |
6d0bfe22 LC |
59 | struct flowi6 fl6; |
60 | int err; | |
6d0bfe22 LC |
61 | struct dst_entry *dst; |
62 | struct rt6_info *rt; | |
63 | struct pingfakehdr pfh; | |
c14ac945 | 64 | struct sockcm_cookie junk = {0}; |
26879da5 | 65 | struct ipcm6_cookie ipc6; |
6d0bfe22 LC |
66 | |
67 | pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); | |
68 | ||
69 | err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph, | |
70 | sizeof(user_icmph)); | |
71 | if (err) | |
72 | return err; | |
73 | ||
74 | if (msg->msg_name) { | |
342dfc30 | 75 | DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name); |
9145736d | 76 | if (msg->msg_namelen < sizeof(*u)) |
6d0bfe22 | 77 | return -EINVAL; |
9145736d LC |
78 | if (u->sin6_family != AF_INET6) { |
79 | return -EAFNOSUPPORT; | |
6d0bfe22 | 80 | } |
6d0bfe22 | 81 | daddr = &(u->sin6_addr); |
5e457896 LC |
82 | if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr))) |
83 | oif = u->sin6_scope_id; | |
6d0bfe22 LC |
84 | } else { |
85 | if (sk->sk_state != TCP_ESTABLISHED) | |
86 | return -EDESTADDRREQ; | |
efe4208f | 87 | daddr = &sk->sk_v6_daddr; |
6d0bfe22 LC |
88 | } |
89 | ||
5e457896 LC |
90 | if (!oif) |
91 | oif = sk->sk_bound_dev_if; | |
92 | ||
93 | if (!oif) | |
94 | oif = np->sticky_pktinfo.ipi6_ifindex; | |
95 | ||
96 | if (!oif && ipv6_addr_is_multicast(daddr)) | |
97 | oif = np->mcast_oif; | |
98 | else if (!oif) | |
99 | oif = np->ucast_oif; | |
6d0bfe22 LC |
100 | |
101 | addr_type = ipv6_addr_type(daddr); | |
5e457896 LC |
102 | if ((__ipv6_addr_needs_scope_id(addr_type) && !oif) || |
103 | (addr_type & IPV6_ADDR_MAPPED) || | |
104 | (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if)) | |
6d0bfe22 LC |
105 | return -EINVAL; |
106 | ||
107 | /* TODO: use ip6_datagram_send_ctl to get options from cmsg */ | |
108 | ||
109 | memset(&fl6, 0, sizeof(fl6)); | |
110 | ||
111 | fl6.flowi6_proto = IPPROTO_ICMPV6; | |
112 | fl6.saddr = np->saddr; | |
113 | fl6.daddr = *daddr; | |
5e457896 | 114 | fl6.flowi6_oif = oif; |
bf439b31 | 115 | fl6.flowi6_mark = sk->sk_mark; |
6d0bfe22 LC |
116 | fl6.fl6_icmp_type = user_icmph.icmp6_type; |
117 | fl6.fl6_icmp_code = user_icmph.icmp6_code; | |
118 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); | |
119 | ||
38b7097b HFS |
120 | ipc6.tclass = np->tclass; |
121 | fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); | |
122 | ||
0e0d44ab | 123 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr); |
6d0bfe22 LC |
124 | if (IS_ERR(dst)) |
125 | return PTR_ERR(dst); | |
126 | rt = (struct rt6_info *) dst; | |
127 | ||
128 | np = inet6_sk(sk); | |
03c2778a DJ |
129 | if (!np) { |
130 | err = -EBADF; | |
131 | goto dst_err_out; | |
132 | } | |
6d0bfe22 LC |
133 | |
134 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) | |
135 | fl6.flowi6_oif = np->mcast_oif; | |
136 | else if (!fl6.flowi6_oif) | |
137 | fl6.flowi6_oif = np->ucast_oif; | |
138 | ||
139 | pfh.icmph.type = user_icmph.icmp6_type; | |
140 | pfh.icmph.code = user_icmph.icmp6_code; | |
141 | pfh.icmph.checksum = 0; | |
142 | pfh.icmph.un.echo.id = inet->inet_sport; | |
143 | pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence; | |
cacdc7d2 | 144 | pfh.msg = msg; |
6d0bfe22 LC |
145 | pfh.wcheck = 0; |
146 | pfh.family = AF_INET6; | |
147 | ||
26879da5 | 148 | ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); |
26879da5 WW |
149 | ipc6.dontfrag = np->dontfrag; |
150 | ipc6.opt = NULL; | |
6d0bfe22 | 151 | |
a1bdc455 | 152 | lock_sock(sk); |
6d0bfe22 | 153 | err = ip6_append_data(sk, ping_getfrag, &pfh, len, |
26879da5 WW |
154 | 0, &ipc6, &fl6, rt, |
155 | MSG_DONTWAIT, &junk); | |
6d0bfe22 LC |
156 | |
157 | if (err) { | |
43a43b60 HFS |
158 | ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev, |
159 | ICMP6_MIB_OUTERRORS); | |
6d0bfe22 LC |
160 | ip6_flush_pending_frames(sk); |
161 | } else { | |
162 | err = icmpv6_push_pending_frames(sk, &fl6, | |
163 | (struct icmp6hdr *) &pfh.icmph, | |
164 | len); | |
165 | } | |
a1bdc455 | 166 | release_sock(sk); |
6d0bfe22 | 167 | |
03c2778a DJ |
168 | dst_err_out: |
169 | dst_release(dst); | |
170 | ||
fbfe80c8 LC |
171 | if (err) |
172 | return err; | |
173 | ||
174 | return len; | |
6d0bfe22 | 175 | } |
d862e546 | 176 | |
6579a023 HY |
177 | struct proto pingv6_prot = { |
178 | .name = "PINGv6", | |
179 | .owner = THIS_MODULE, | |
180 | .init = ping_init_sock, | |
181 | .close = ping_close, | |
182 | .connect = ip6_datagram_connect_v6_only, | |
183 | .disconnect = udp_disconnect, | |
184 | .setsockopt = ipv6_setsockopt, | |
185 | .getsockopt = ipv6_getsockopt, | |
186 | .sendmsg = ping_v6_sendmsg, | |
187 | .recvmsg = ping_recvmsg, | |
188 | .bind = ping_bind, | |
189 | .backlog_rcv = ping_queue_rcv_skb, | |
190 | .hash = ping_hash, | |
191 | .unhash = ping_unhash, | |
192 | .get_port = ping_get_port, | |
193 | .obj_size = sizeof(struct raw6_sock), | |
194 | }; | |
195 | EXPORT_SYMBOL_GPL(pingv6_prot); | |
196 | ||
197 | static struct inet_protosw pingv6_protosw = { | |
198 | .type = SOCK_DGRAM, | |
199 | .protocol = IPPROTO_ICMPV6, | |
200 | .prot = &pingv6_prot, | |
201 | .ops = &inet6_dgram_ops, | |
202 | .flags = INET_PROTOSW_REUSE, | |
203 | }; | |
204 | ||
d862e546 LC |
205 | #ifdef CONFIG_PROC_FS |
206 | static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos) | |
207 | { | |
208 | return ping_seq_start(seq, pos, AF_INET6); | |
209 | } | |
210 | ||
a06a2d37 | 211 | static int ping_v6_seq_show(struct seq_file *seq, void *v) |
d862e546 LC |
212 | { |
213 | if (v == SEQ_START_TOKEN) { | |
214 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
215 | } else { | |
216 | int bucket = ((struct ping_iter_state *) seq->private)->bucket; | |
217 | struct inet_sock *inet = inet_sk(v); | |
218 | __u16 srcp = ntohs(inet->inet_sport); | |
219 | __u16 destp = ntohs(inet->inet_dport); | |
220 | ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); | |
221 | } | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static struct ping_seq_afinfo ping_v6_seq_afinfo = { | |
226 | .name = "icmp6", | |
227 | .family = AF_INET6, | |
228 | .seq_fops = &ping_seq_fops, | |
229 | .seq_ops = { | |
230 | .start = ping_v6_seq_start, | |
231 | .show = ping_v6_seq_show, | |
232 | .next = ping_seq_next, | |
233 | .stop = ping_seq_stop, | |
234 | }, | |
235 | }; | |
236 | ||
237 | static int __net_init ping_v6_proc_init_net(struct net *net) | |
238 | { | |
239 | return ping_proc_register(net, &ping_v6_seq_afinfo); | |
240 | } | |
241 | ||
242 | static void __net_init ping_v6_proc_exit_net(struct net *net) | |
243 | { | |
244 | return ping_proc_unregister(net, &ping_v6_seq_afinfo); | |
245 | } | |
246 | ||
247 | static struct pernet_operations ping_v6_net_ops = { | |
248 | .init = ping_v6_proc_init_net, | |
249 | .exit = ping_v6_proc_exit_net, | |
250 | }; | |
251 | #endif | |
252 | ||
253 | int __init pingv6_init(void) | |
254 | { | |
255 | #ifdef CONFIG_PROC_FS | |
256 | int ret = register_pernet_subsys(&ping_v6_net_ops); | |
257 | if (ret) | |
258 | return ret; | |
259 | #endif | |
260 | pingv6_ops.ipv6_recv_error = ipv6_recv_error; | |
4b261c75 HFS |
261 | pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl; |
262 | pingv6_ops.ip6_datagram_recv_specific_ctl = | |
263 | ip6_datagram_recv_specific_ctl; | |
d862e546 LC |
264 | pingv6_ops.icmpv6_err_convert = icmpv6_err_convert; |
265 | pingv6_ops.ipv6_icmp_error = ipv6_icmp_error; | |
266 | pingv6_ops.ipv6_chk_addr = ipv6_chk_addr; | |
267 | return inet6_register_protosw(&pingv6_protosw); | |
268 | } | |
269 | ||
270 | /* This never gets called because it's not possible to unload the ipv6 module, | |
271 | * but just in case. | |
272 | */ | |
273 | void pingv6_exit(void) | |
274 | { | |
275 | pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error; | |
4b261c75 HFS |
276 | pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl; |
277 | pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl; | |
d862e546 LC |
278 | pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert; |
279 | pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error; | |
280 | pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr; | |
281 | #ifdef CONFIG_PROC_FS | |
282 | unregister_pernet_subsys(&ping_v6_net_ops); | |
283 | #endif | |
284 | inet6_unregister_protosw(&pingv6_protosw); | |
285 | } |