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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 <linux/proc_fs.h>
28#include <net/ping.h>
29
30
31static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
32 int *addr_len)
33{
34 return -EAFNOSUPPORT;
35}
36static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
37 struct sk_buff *skb)
38{
39}
40static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
41{
42 return -EAFNOSUPPORT;
43}
44static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
45 __be16 port, u32 info, u8 *payload) {}
46static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
47 const struct net_device *dev, int strict)
48{
49 return 0;
50}
51
52static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
53{
54 struct inet_sock *inet = inet_sk(sk);
55 struct ipv6_pinfo *np = inet6_sk(sk);
56 struct icmp6hdr user_icmph;
57 int addr_type;
58 struct in6_addr *daddr;
59 int oif = 0;
60 struct flowi6 fl6;
61 int err;
62 struct dst_entry *dst;
63 struct rt6_info *rt;
64 struct pingfakehdr pfh;
65 struct sockcm_cookie junk = {0};
66 struct ipcm6_cookie ipc6;
67
68 pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
69
70 err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
71 sizeof(user_icmph));
72 if (err)
73 return err;
74
75 if (msg->msg_name) {
76 DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name);
77 if (msg->msg_namelen < sizeof(*u))
78 return -EINVAL;
79 if (u->sin6_family != AF_INET6) {
80 return -EAFNOSUPPORT;
81 }
82 daddr = &(u->sin6_addr);
83 if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr)))
84 oif = u->sin6_scope_id;
85 } else {
86 if (sk->sk_state != TCP_ESTABLISHED)
87 return -EDESTADDRREQ;
88 daddr = &sk->sk_v6_daddr;
89 }
90
91 if (!oif)
92 oif = sk->sk_bound_dev_if;
93
94 if (!oif)
95 oif = np->sticky_pktinfo.ipi6_ifindex;
96
97 if (!oif && ipv6_addr_is_multicast(daddr))
98 oif = np->mcast_oif;
99 else if (!oif)
100 oif = np->ucast_oif;
101
102 addr_type = ipv6_addr_type(daddr);
103 if ((__ipv6_addr_needs_scope_id(addr_type) && !oif) ||
104 (addr_type & IPV6_ADDR_MAPPED) ||
105 (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if))
106 return -EINVAL;
107
108
109
110 memset(&fl6, 0, sizeof(fl6));
111
112 fl6.flowi6_proto = IPPROTO_ICMPV6;
113 fl6.saddr = np->saddr;
114 fl6.daddr = *daddr;
115 fl6.flowi6_oif = oif;
116 fl6.flowi6_mark = sk->sk_mark;
117 fl6.flowi6_uid = sk->sk_uid;
118 fl6.fl6_icmp_type = user_icmph.icmp6_type;
119 fl6.fl6_icmp_code = user_icmph.icmp6_code;
120 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
121
122 ipc6.tclass = np->tclass;
123 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
124
125 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, false);
126 if (IS_ERR(dst))
127 return PTR_ERR(dst);
128 rt = (struct rt6_info *) dst;
129
130 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
131 fl6.flowi6_oif = np->mcast_oif;
132 else if (!fl6.flowi6_oif)
133 fl6.flowi6_oif = np->ucast_oif;
134
135 pfh.icmph.type = user_icmph.icmp6_type;
136 pfh.icmph.code = user_icmph.icmp6_code;
137 pfh.icmph.checksum = 0;
138 pfh.icmph.un.echo.id = inet->inet_sport;
139 pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
140 pfh.msg = msg;
141 pfh.wcheck = 0;
142 pfh.family = AF_INET6;
143
144 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
145 ipc6.dontfrag = np->dontfrag;
146 ipc6.opt = NULL;
147
148 lock_sock(sk);
149 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
150 0, &ipc6, &fl6, rt,
151 MSG_DONTWAIT, &junk);
152
153 if (err) {
154 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
155 ICMP6_MIB_OUTERRORS);
156 ip6_flush_pending_frames(sk);
157 } else {
158 icmpv6_push_pending_frames(sk, &fl6,
159 (struct icmp6hdr *)&pfh.icmph, len);
160 }
161 release_sock(sk);
162
163 dst_release(dst);
164
165 if (err)
166 return err;
167
168 return len;
169}
170
171struct proto pingv6_prot = {
172 .name = "PINGv6",
173 .owner = THIS_MODULE,
174 .init = ping_init_sock,
175 .close = ping_close,
176 .connect = ip6_datagram_connect_v6_only,
177 .disconnect = __udp_disconnect,
178 .setsockopt = ipv6_setsockopt,
179 .getsockopt = ipv6_getsockopt,
180 .sendmsg = ping_v6_sendmsg,
181 .recvmsg = ping_recvmsg,
182 .bind = ping_bind,
183 .backlog_rcv = ping_queue_rcv_skb,
184 .hash = ping_hash,
185 .unhash = ping_unhash,
186 .get_port = ping_get_port,
187 .obj_size = sizeof(struct raw6_sock),
188};
189EXPORT_SYMBOL_GPL(pingv6_prot);
190
191static struct inet_protosw pingv6_protosw = {
192 .type = SOCK_DGRAM,
193 .protocol = IPPROTO_ICMPV6,
194 .prot = &pingv6_prot,
195 .ops = &inet6_sockraw_ops,
196 .flags = INET_PROTOSW_REUSE,
197};
198
199#ifdef CONFIG_PROC_FS
200static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
201{
202 return ping_seq_start(seq, pos, AF_INET6);
203}
204
205static int ping_v6_seq_show(struct seq_file *seq, void *v)
206{
207 if (v == SEQ_START_TOKEN) {
208 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
209 } else {
210 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
211 struct inet_sock *inet = inet_sk(v);
212 __u16 srcp = ntohs(inet->inet_sport);
213 __u16 destp = ntohs(inet->inet_dport);
214 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
215 }
216 return 0;
217}
218
219static const struct seq_operations ping_v6_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
226static int __net_init ping_v6_proc_init_net(struct net *net)
227{
228 if (!proc_create_net("icmp6", 0444, net->proc_net, &ping_v6_seq_ops,
229 sizeof(struct ping_iter_state)))
230 return -ENOMEM;
231 return 0;
232}
233
234static void __net_exit ping_v6_proc_exit_net(struct net *net)
235{
236 remove_proc_entry("icmp6", net->proc_net);
237}
238
239static struct pernet_operations ping_v6_net_ops = {
240 .init = ping_v6_proc_init_net,
241 .exit = ping_v6_proc_exit_net,
242};
243#endif
244
245int __init pingv6_init(void)
246{
247#ifdef CONFIG_PROC_FS
248 int ret = register_pernet_subsys(&ping_v6_net_ops);
249 if (ret)
250 return ret;
251#endif
252 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
253 pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
254 pingv6_ops.ip6_datagram_recv_specific_ctl =
255 ip6_datagram_recv_specific_ctl;
256 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
257 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
258 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
259 return inet6_register_protosw(&pingv6_protosw);
260}
261
262
263
264
265void pingv6_exit(void)
266{
267 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
268 pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl;
269 pingv6_ops.ip6_datagram_recv_specific_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
