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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
29
30static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
31 int *addr_len)
32{
33 return -EAFNOSUPPORT;
34}
35static void dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
36 struct sk_buff *skb)
37{
38}
39static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
40{
41 return -EAFNOSUPPORT;
42}
43static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
44 __be16 port, u32 info, u8 *payload) {}
45static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
46 const struct net_device *dev, int strict)
47{
48 return 0;
49}
50
51static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
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;
58 int oif = 0;
59 struct flowi6 fl6;
60 int err;
61 struct dst_entry *dst;
62 struct rt6_info *rt;
63 struct pingfakehdr pfh;
64 struct sockcm_cookie junk = {0};
65 struct ipcm6_cookie ipc6;
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) {
75 DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name);
76 if (msg->msg_namelen < sizeof(*u))
77 return -EINVAL;
78 if (u->sin6_family != AF_INET6) {
79 return -EAFNOSUPPORT;
80 }
81 daddr = &(u->sin6_addr);
82 if (__ipv6_addr_needs_scope_id(ipv6_addr_type(daddr)))
83 oif = u->sin6_scope_id;
84 } else {
85 if (sk->sk_state != TCP_ESTABLISHED)
86 return -EDESTADDRREQ;
87 daddr = &sk->sk_v6_daddr;
88 }
89
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;
100
101 addr_type = ipv6_addr_type(daddr);
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))
105 return -EINVAL;
106
107
108
109 memset(&fl6, 0, sizeof(fl6));
110
111 fl6.flowi6_proto = IPPROTO_ICMPV6;
112 fl6.saddr = np->saddr;
113 fl6.daddr = *daddr;
114 fl6.flowi6_oif = oif;
115 fl6.flowi6_mark = sk->sk_mark;
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
120 ipc6.tclass = np->tclass;
121 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
122
123 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr);
124 if (IS_ERR(dst))
125 return PTR_ERR(dst);
126 rt = (struct rt6_info *) dst;
127
128 np = inet6_sk(sk);
129 if (!np) {
130 err = -EBADF;
131 goto dst_err_out;
132 }
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;
144 pfh.msg = msg;
145 pfh.wcheck = 0;
146 pfh.family = AF_INET6;
147
148 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
149 ipc6.dontfrag = np->dontfrag;
150 ipc6.opt = NULL;
151
152 lock_sock(sk);
153 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
154 0, &ipc6, &fl6, rt,
155 MSG_DONTWAIT, &junk);
156
157 if (err) {
158 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
159 ICMP6_MIB_OUTERRORS);
160 ip6_flush_pending_frames(sk);
161 } else {
162 err = icmpv6_push_pending_frames(sk, &fl6,
163 (struct icmp6hdr *) &pfh.icmph,
164 len);
165 }
166 release_sock(sk);
167
168dst_err_out:
169 dst_release(dst);
170
171 if (err)
172 return err;
173
174 return len;
175}
176
177struct 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};
195EXPORT_SYMBOL_GPL(pingv6_prot);
196
197static 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
205#ifdef CONFIG_PROC_FS
206static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
207{
208 return ping_seq_start(seq, pos, AF_INET6);
209}
210
211static int ping_v6_seq_show(struct seq_file *seq, void *v)
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
225static 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
237static int __net_init ping_v6_proc_init_net(struct net *net)
238{
239 return ping_proc_register(net, &ping_v6_seq_afinfo);
240}
241
242static void __net_init ping_v6_proc_exit_net(struct net *net)
243{
244 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
245}
246
247static 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
253int __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;
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;
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
271
272
273void pingv6_exit(void)
274{
275 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
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;
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}
286
