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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.flowi6_uid = sk->sk_uid;
117 fl6.fl6_icmp_type = user_icmph.icmp6_type;
118 fl6.fl6_icmp_code = user_icmph.icmp6_code;
119 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
120
121 ipc6.tclass = np->tclass;
122 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
123
124 dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, false);
125 if (IS_ERR(dst))
126 return PTR_ERR(dst);
127 rt = (struct rt6_info *) dst;
128
129 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
130 fl6.flowi6_oif = np->mcast_oif;
131 else if (!fl6.flowi6_oif)
132 fl6.flowi6_oif = np->ucast_oif;
133
134 pfh.icmph.type = user_icmph.icmp6_type;
135 pfh.icmph.code = user_icmph.icmp6_code;
136 pfh.icmph.checksum = 0;
137 pfh.icmph.un.echo.id = inet->inet_sport;
138 pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
139 pfh.msg = msg;
140 pfh.wcheck = 0;
141 pfh.family = AF_INET6;
142
143 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
144 ipc6.dontfrag = np->dontfrag;
145 ipc6.opt = NULL;
146
147 lock_sock(sk);
148 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
149 0, &ipc6, &fl6, rt,
150 MSG_DONTWAIT, &junk);
151
152 if (err) {
153 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
154 ICMP6_MIB_OUTERRORS);
155 ip6_flush_pending_frames(sk);
156 } else {
157 icmpv6_push_pending_frames(sk, &fl6,
158 (struct icmp6hdr *)&pfh.icmph, len);
159 }
160 release_sock(sk);
161
162 dst_release(dst);
163
164 if (err)
165 return err;
166
167 return len;
168}
169
170struct proto pingv6_prot = {
171 .name = "PINGv6",
172 .owner = THIS_MODULE,
173 .init = ping_init_sock,
174 .close = ping_close,
175 .connect = ip6_datagram_connect_v6_only,
176 .disconnect = __udp_disconnect,
177 .setsockopt = ipv6_setsockopt,
178 .getsockopt = ipv6_getsockopt,
179 .sendmsg = ping_v6_sendmsg,
180 .recvmsg = ping_recvmsg,
181 .bind = ping_bind,
182 .backlog_rcv = ping_queue_rcv_skb,
183 .hash = ping_hash,
184 .unhash = ping_unhash,
185 .get_port = ping_get_port,
186 .obj_size = sizeof(struct raw6_sock),
187};
188EXPORT_SYMBOL_GPL(pingv6_prot);
189
190static struct inet_protosw pingv6_protosw = {
191 .type = SOCK_DGRAM,
192 .protocol = IPPROTO_ICMPV6,
193 .prot = &pingv6_prot,
194 .ops = &inet6_sockraw_ops,
195 .flags = INET_PROTOSW_REUSE,
196};
197
198#ifdef CONFIG_PROC_FS
199static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
200{
201 return ping_seq_start(seq, pos, AF_INET6);
202}
203
204static int ping_v6_seq_show(struct seq_file *seq, void *v)
205{
206 if (v == SEQ_START_TOKEN) {
207 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
208 } else {
209 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
210 struct inet_sock *inet = inet_sk(v);
211 __u16 srcp = ntohs(inet->inet_sport);
212 __u16 destp = ntohs(inet->inet_dport);
213 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
214 }
215 return 0;
216}
217
218static struct ping_seq_afinfo ping_v6_seq_afinfo = {
219 .name = "icmp6",
220 .family = AF_INET6,
221 .seq_fops = &ping_seq_fops,
222 .seq_ops = {
223 .start = ping_v6_seq_start,
224 .show = ping_v6_seq_show,
225 .next = ping_seq_next,
226 .stop = ping_seq_stop,
227 },
228};
229
230static int __net_init ping_v6_proc_init_net(struct net *net)
231{
232 return ping_proc_register(net, &ping_v6_seq_afinfo);
233}
234
235static void __net_init ping_v6_proc_exit_net(struct net *net)
236{
237 return ping_proc_unregister(net, &ping_v6_seq_afinfo);
238}
239
240static struct pernet_operations ping_v6_net_ops = {
241 .init = ping_v6_proc_init_net,
242 .exit = ping_v6_proc_exit_net,
243};
244#endif
245
246int __init pingv6_init(void)
247{
248#ifdef CONFIG_PROC_FS
249 int ret = register_pernet_subsys(&ping_v6_net_ops);
250 if (ret)
251 return ret;
252#endif
253 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
254 pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
255 pingv6_ops.ip6_datagram_recv_specific_ctl =
256 ip6_datagram_recv_specific_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_common_ctl = dummy_ip6_datagram_recv_ctl;
270 pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;
271 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
272 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
273 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
274#ifdef CONFIG_PROC_FS
275 unregister_pernet_subsys(&ping_v6_net_ops);
276#endif
277 inet6_unregister_protosw(&pingv6_protosw);
278}
279
