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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 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 ipcm6_init_sk(&ipc6, np);
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
145 lock_sock(sk);
146 err = ip6_append_data(sk, ping_getfrag, &pfh, len,
147 0, &ipc6, &fl6, rt,
148 MSG_DONTWAIT);
149
150 if (err) {
151 ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev,
152 ICMP6_MIB_OUTERRORS);
153 ip6_flush_pending_frames(sk);
154 } else {
155 icmpv6_push_pending_frames(sk, &fl6,
156 (struct icmp6hdr *)&pfh.icmph, len);
157 }
158 release_sock(sk);
159
160 dst_release(dst);
161
162 if (err)
163 return err;
164
165 return len;
166}
167
168struct proto pingv6_prot = {
169 .name = "PINGv6",
170 .owner = THIS_MODULE,
171 .init = ping_init_sock,
172 .close = ping_close,
173 .connect = ip6_datagram_connect_v6_only,
174 .disconnect = __udp_disconnect,
175 .setsockopt = ipv6_setsockopt,
176 .getsockopt = ipv6_getsockopt,
177 .sendmsg = ping_v6_sendmsg,
178 .recvmsg = ping_recvmsg,
179 .bind = ping_bind,
180 .backlog_rcv = ping_queue_rcv_skb,
181 .hash = ping_hash,
182 .unhash = ping_unhash,
183 .get_port = ping_get_port,
184 .obj_size = sizeof(struct raw6_sock),
185};
186EXPORT_SYMBOL_GPL(pingv6_prot);
187
188static struct inet_protosw pingv6_protosw = {
189 .type = SOCK_DGRAM,
190 .protocol = IPPROTO_ICMPV6,
191 .prot = &pingv6_prot,
192 .ops = &inet6_sockraw_ops,
193 .flags = INET_PROTOSW_REUSE,
194};
195
196#ifdef CONFIG_PROC_FS
197static void *ping_v6_seq_start(struct seq_file *seq, loff_t *pos)
198{
199 return ping_seq_start(seq, pos, AF_INET6);
200}
201
202static int ping_v6_seq_show(struct seq_file *seq, void *v)
203{
204 if (v == SEQ_START_TOKEN) {
205 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
206 } else {
207 int bucket = ((struct ping_iter_state *) seq->private)->bucket;
208 struct inet_sock *inet = inet_sk(v);
209 __u16 srcp = ntohs(inet->inet_sport);
210 __u16 destp = ntohs(inet->inet_dport);
211 ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket);
212 }
213 return 0;
214}
215
216static const struct seq_operations ping_v6_seq_ops = {
217 .start = ping_v6_seq_start,
218 .show = ping_v6_seq_show,
219 .next = ping_seq_next,
220 .stop = ping_seq_stop,
221};
222
223static int __net_init ping_v6_proc_init_net(struct net *net)
224{
225 if (!proc_create_net("icmp6", 0444, net->proc_net, &ping_v6_seq_ops,
226 sizeof(struct ping_iter_state)))
227 return -ENOMEM;
228 return 0;
229}
230
231static void __net_init ping_v6_proc_exit_net(struct net *net)
232{
233 remove_proc_entry("icmp6", net->proc_net);
234}
235
236static struct pernet_operations ping_v6_net_ops = {
237 .init = ping_v6_proc_init_net,
238 .exit = ping_v6_proc_exit_net,
239};
240#endif
241
242int __init pingv6_init(void)
243{
244#ifdef CONFIG_PROC_FS
245 int ret = register_pernet_subsys(&ping_v6_net_ops);
246 if (ret)
247 return ret;
248#endif
249 pingv6_ops.ipv6_recv_error = ipv6_recv_error;
250 pingv6_ops.ip6_datagram_recv_common_ctl = ip6_datagram_recv_common_ctl;
251 pingv6_ops.ip6_datagram_recv_specific_ctl =
252 ip6_datagram_recv_specific_ctl;
253 pingv6_ops.icmpv6_err_convert = icmpv6_err_convert;
254 pingv6_ops.ipv6_icmp_error = ipv6_icmp_error;
255 pingv6_ops.ipv6_chk_addr = ipv6_chk_addr;
256 return inet6_register_protosw(&pingv6_protosw);
257}
258
259
260
261
262void pingv6_exit(void)
263{
264 pingv6_ops.ipv6_recv_error = dummy_ipv6_recv_error;
265 pingv6_ops.ip6_datagram_recv_common_ctl = dummy_ip6_datagram_recv_ctl;
266 pingv6_ops.ip6_datagram_recv_specific_ctl = dummy_ip6_datagram_recv_ctl;
267 pingv6_ops.icmpv6_err_convert = dummy_icmpv6_err_convert;
268 pingv6_ops.ipv6_icmp_error = dummy_ipv6_icmp_error;
269 pingv6_ops.ipv6_chk_addr = dummy_ipv6_chk_addr;
270#ifdef CONFIG_PROC_FS
271 unregister_pernet_subsys(&ping_v6_net_ops);
272#endif
273 inet6_unregister_protosw(&pingv6_protosw);
274}
275