1
2#include <linux/module.h>
3
4#include <linux/inet_diag.h>
5#include <linux/sock_diag.h>
6
7#include <net/inet_sock.h>
8#include <net/raw.h>
9#include <net/rawv6.h>
10
11#ifdef pr_fmt
12# undef pr_fmt
13#endif
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17static struct raw_hashinfo *
18raw_get_hashinfo(const struct inet_diag_req_v2 *r)
19{
20 if (r->sdiag_family == AF_INET) {
21 return &raw_v4_hashinfo;
22#if IS_ENABLED(CONFIG_IPV6)
23 } else if (r->sdiag_family == AF_INET6) {
24 return &raw_v6_hashinfo;
25#endif
26 } else {
27 return ERR_PTR(-EINVAL);
28 }
29}
30
31
32
33
34
35
36
37static struct sock *raw_lookup(struct net *net, struct sock *from,
38 const struct inet_diag_req_v2 *req)
39{
40 struct inet_diag_req_raw *r = (void *)req;
41 struct sock *sk = NULL;
42
43 if (r->sdiag_family == AF_INET)
44 sk = __raw_v4_lookup(net, from, r->sdiag_raw_protocol,
45 r->id.idiag_dst[0],
46 r->id.idiag_src[0],
47 r->id.idiag_if, 0);
48#if IS_ENABLED(CONFIG_IPV6)
49 else
50 sk = __raw_v6_lookup(net, from, r->sdiag_raw_protocol,
51 (const struct in6_addr *)r->id.idiag_src,
52 (const struct in6_addr *)r->id.idiag_dst,
53 r->id.idiag_if, 0);
54#endif
55 return sk;
56}
57
58static struct sock *raw_sock_get(struct net *net, const struct inet_diag_req_v2 *r)
59{
60 struct raw_hashinfo *hashinfo = raw_get_hashinfo(r);
61 struct sock *sk = NULL, *s;
62 int slot;
63
64 if (IS_ERR(hashinfo))
65 return ERR_CAST(hashinfo);
66
67 read_lock(&hashinfo->lock);
68 for (slot = 0; slot < RAW_HTABLE_SIZE; slot++) {
69 sk_for_each(s, &hashinfo->ht[slot]) {
70 sk = raw_lookup(net, s, r);
71 if (sk) {
72
73
74
75
76
77
78
79 sock_hold(sk);
80 goto out_unlock;
81 }
82 }
83 }
84out_unlock:
85 read_unlock(&hashinfo->lock);
86
87 return sk ? sk : ERR_PTR(-ENOENT);
88}
89
90static int raw_diag_dump_one(struct netlink_callback *cb,
91 const struct inet_diag_req_v2 *r)
92{
93 struct sk_buff *in_skb = cb->skb;
94 struct sk_buff *rep;
95 struct sock *sk;
96 struct net *net;
97 int err;
98
99 net = sock_net(in_skb->sk);
100 sk = raw_sock_get(net, r);
101 if (IS_ERR(sk))
102 return PTR_ERR(sk);
103
104 rep = nlmsg_new(nla_total_size(sizeof(struct inet_diag_msg)) +
105 inet_diag_msg_attrs_size() +
106 nla_total_size(sizeof(struct inet_diag_meminfo)) + 64,
107 GFP_KERNEL);
108 if (!rep) {
109 sock_put(sk);
110 return -ENOMEM;
111 }
112
113 err = inet_sk_diag_fill(sk, NULL, rep, cb, r, 0,
114 netlink_net_capable(in_skb, CAP_NET_ADMIN));
115 sock_put(sk);
116
117 if (err < 0) {
118 kfree_skb(rep);
119 return err;
120 }
121
122 err = netlink_unicast(net->diag_nlsk, rep,
123 NETLINK_CB(in_skb).portid,
124 MSG_DONTWAIT);
125 if (err > 0)
126 err = 0;
127 return err;
128}
129
130static int sk_diag_dump(struct sock *sk, struct sk_buff *skb,
131 struct netlink_callback *cb,
132 const struct inet_diag_req_v2 *r,
133 struct nlattr *bc, bool net_admin)
134{
135 if (!inet_diag_bc_sk(bc, sk))
136 return 0;
137
138 return inet_sk_diag_fill(sk, NULL, skb, cb, r, NLM_F_MULTI, net_admin);
139}
140
141static void raw_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
142 const struct inet_diag_req_v2 *r)
143{
144 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
145 struct raw_hashinfo *hashinfo = raw_get_hashinfo(r);
146 struct net *net = sock_net(skb->sk);
147 struct inet_diag_dump_data *cb_data;
148 int num, s_num, slot, s_slot;
149 struct sock *sk = NULL;
150 struct nlattr *bc;
151
152 if (IS_ERR(hashinfo))
153 return;
154
155 cb_data = cb->data;
156 bc = cb_data->inet_diag_nla_bc;
157 s_slot = cb->args[0];
158 num = s_num = cb->args[1];
159
160 read_lock(&hashinfo->lock);
161 for (slot = s_slot; slot < RAW_HTABLE_SIZE; s_num = 0, slot++) {
162 num = 0;
163
164 sk_for_each(sk, &hashinfo->ht[slot]) {
165 struct inet_sock *inet = inet_sk(sk);
166
167 if (!net_eq(sock_net(sk), net))
168 continue;
169 if (num < s_num)
170 goto next;
171 if (sk->sk_family != r->sdiag_family)
172 goto next;
173 if (r->id.idiag_sport != inet->inet_sport &&
174 r->id.idiag_sport)
175 goto next;
176 if (r->id.idiag_dport != inet->inet_dport &&
177 r->id.idiag_dport)
178 goto next;
179 if (sk_diag_dump(sk, skb, cb, r, bc, net_admin) < 0)
180 goto out_unlock;
181next:
182 num++;
183 }
184 }
185
186out_unlock:
187 read_unlock(&hashinfo->lock);
188
189 cb->args[0] = slot;
190 cb->args[1] = num;
191}
192
193static void raw_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
194 void *info)
195{
196 r->idiag_rqueue = sk_rmem_alloc_get(sk);
197 r->idiag_wqueue = sk_wmem_alloc_get(sk);
198}
199
200#ifdef CONFIG_INET_DIAG_DESTROY
201static int raw_diag_destroy(struct sk_buff *in_skb,
202 const struct inet_diag_req_v2 *r)
203{
204 struct net *net = sock_net(in_skb->sk);
205 struct sock *sk;
206 int err;
207
208 sk = raw_sock_get(net, r);
209 if (IS_ERR(sk))
210 return PTR_ERR(sk);
211 err = sock_diag_destroy(sk, ECONNABORTED);
212 sock_put(sk);
213 return err;
214}
215#endif
216
217static const struct inet_diag_handler raw_diag_handler = {
218 .dump = raw_diag_dump,
219 .dump_one = raw_diag_dump_one,
220 .idiag_get_info = raw_diag_get_info,
221 .idiag_type = IPPROTO_RAW,
222 .idiag_info_size = 0,
223#ifdef CONFIG_INET_DIAG_DESTROY
224 .destroy = raw_diag_destroy,
225#endif
226};
227
228static void __always_unused __check_inet_diag_req_raw(void)
229{
230
231
232
233
234#define __offset_mismatch(m1, m2) \
235 (offsetof(struct inet_diag_req_v2, m1) != \
236 offsetof(struct inet_diag_req_raw, m2))
237
238 BUILD_BUG_ON(sizeof(struct inet_diag_req_v2) !=
239 sizeof(struct inet_diag_req_raw));
240 BUILD_BUG_ON(__offset_mismatch(sdiag_family, sdiag_family));
241 BUILD_BUG_ON(__offset_mismatch(sdiag_protocol, sdiag_protocol));
242 BUILD_BUG_ON(__offset_mismatch(idiag_ext, idiag_ext));
243 BUILD_BUG_ON(__offset_mismatch(pad, sdiag_raw_protocol));
244 BUILD_BUG_ON(__offset_mismatch(idiag_states, idiag_states));
245 BUILD_BUG_ON(__offset_mismatch(id, id));
246#undef __offset_mismatch
247}
248
249static int __init raw_diag_init(void)
250{
251 return inet_diag_register(&raw_diag_handler);
252}
253
254static void __exit raw_diag_exit(void)
255{
256 inet_diag_unregister(&raw_diag_handler);
257}
258
259module_init(raw_diag_init);
260module_exit(raw_diag_exit);
261MODULE_LICENSE("GPL");
262MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-255 );
263MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10-255
264
