This source file includes following definitions.
- raw_get_hashinfo
- raw_lookup
- raw_sock_get
- raw_diag_dump_one
- sk_diag_dump
- raw_diag_dump
- raw_diag_get_info
- raw_diag_destroy
- __check_inet_diag_req_raw
- raw_diag_init
- raw_diag_exit
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
17 static struct raw_hashinfo *
18 raw_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
37 static 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
58 static 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 }
84 out_unlock:
85 read_unlock(&hashinfo->lock);
86
87 return sk ? sk : ERR_PTR(-ENOENT);
88 }
89
90 static int raw_diag_dump_one(struct sk_buff *in_skb,
91 const struct nlmsghdr *nlh,
92 const struct inet_diag_req_v2 *r)
93 {
94 struct net *net = sock_net(in_skb->sk);
95 struct sk_buff *rep;
96 struct sock *sk;
97 int err;
98
99 sk = raw_sock_get(net, r);
100 if (IS_ERR(sk))
101 return PTR_ERR(sk);
102
103 rep = nlmsg_new(nla_total_size(sizeof(struct inet_diag_msg)) +
104 inet_diag_msg_attrs_size() +
105 nla_total_size(sizeof(struct inet_diag_meminfo)) + 64,
106 GFP_KERNEL);
107 if (!rep) {
108 sock_put(sk);
109 return -ENOMEM;
110 }
111
112 err = inet_sk_diag_fill(sk, NULL, rep, r,
113 sk_user_ns(NETLINK_CB(in_skb).sk),
114 NETLINK_CB(in_skb).portid,
115 nlh->nlmsg_seq, 0, nlh,
116 netlink_net_capable(in_skb, CAP_NET_ADMIN));
117 sock_put(sk);
118
119 if (err < 0) {
120 kfree_skb(rep);
121 return err;
122 }
123
124 err = netlink_unicast(net->diag_nlsk, rep,
125 NETLINK_CB(in_skb).portid,
126 MSG_DONTWAIT);
127 if (err > 0)
128 err = 0;
129 return err;
130 }
131
132 static int sk_diag_dump(struct sock *sk, struct sk_buff *skb,
133 struct netlink_callback *cb,
134 const struct inet_diag_req_v2 *r,
135 struct nlattr *bc, bool net_admin)
136 {
137 if (!inet_diag_bc_sk(bc, sk))
138 return 0;
139
140 return inet_sk_diag_fill(sk, NULL, skb, r,
141 sk_user_ns(NETLINK_CB(cb->skb).sk),
142 NETLINK_CB(cb->skb).portid,
143 cb->nlh->nlmsg_seq, NLM_F_MULTI,
144 cb->nlh, net_admin);
145 }
146
147 static void raw_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
148 const struct inet_diag_req_v2 *r, struct nlattr *bc)
149 {
150 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
151 struct raw_hashinfo *hashinfo = raw_get_hashinfo(r);
152 struct net *net = sock_net(skb->sk);
153 int num, s_num, slot, s_slot;
154 struct sock *sk = NULL;
155
156 if (IS_ERR(hashinfo))
157 return;
158
159 s_slot = cb->args[0];
160 num = s_num = cb->args[1];
161
162 read_lock(&hashinfo->lock);
163 for (slot = s_slot; slot < RAW_HTABLE_SIZE; s_num = 0, slot++) {
164 num = 0;
165
166 sk_for_each(sk, &hashinfo->ht[slot]) {
167 struct inet_sock *inet = inet_sk(sk);
168
169 if (!net_eq(sock_net(sk), net))
170 continue;
171 if (num < s_num)
172 goto next;
173 if (sk->sk_family != r->sdiag_family)
174 goto next;
175 if (r->id.idiag_sport != inet->inet_sport &&
176 r->id.idiag_sport)
177 goto next;
178 if (r->id.idiag_dport != inet->inet_dport &&
179 r->id.idiag_dport)
180 goto next;
181 if (sk_diag_dump(sk, skb, cb, r, bc, net_admin) < 0)
182 goto out_unlock;
183 next:
184 num++;
185 }
186 }
187
188 out_unlock:
189 read_unlock(&hashinfo->lock);
190
191 cb->args[0] = slot;
192 cb->args[1] = num;
193 }
194
195 static void raw_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
196 void *info)
197 {
198 r->idiag_rqueue = sk_rmem_alloc_get(sk);
199 r->idiag_wqueue = sk_wmem_alloc_get(sk);
200 }
201
202 #ifdef CONFIG_INET_DIAG_DESTROY
203 static int raw_diag_destroy(struct sk_buff *in_skb,
204 const struct inet_diag_req_v2 *r)
205 {
206 struct net *net = sock_net(in_skb->sk);
207 struct sock *sk;
208 int err;
209
210 sk = raw_sock_get(net, r);
211 if (IS_ERR(sk))
212 return PTR_ERR(sk);
213 err = sock_diag_destroy(sk, ECONNABORTED);
214 sock_put(sk);
215 return err;
216 }
217 #endif
218
219 static const struct inet_diag_handler raw_diag_handler = {
220 .dump = raw_diag_dump,
221 .dump_one = raw_diag_dump_one,
222 .idiag_get_info = raw_diag_get_info,
223 .idiag_type = IPPROTO_RAW,
224 .idiag_info_size = 0,
225 #ifdef CONFIG_INET_DIAG_DESTROY
226 .destroy = raw_diag_destroy,
227 #endif
228 };
229
230 static void __always_unused __check_inet_diag_req_raw(void)
231 {
232
233
234
235
236 #define __offset_mismatch(m1, m2) \
237 (offsetof(struct inet_diag_req_v2, m1) != \
238 offsetof(struct inet_diag_req_raw, m2))
239
240 BUILD_BUG_ON(sizeof(struct inet_diag_req_v2) !=
241 sizeof(struct inet_diag_req_raw));
242 BUILD_BUG_ON(__offset_mismatch(sdiag_family, sdiag_family));
243 BUILD_BUG_ON(__offset_mismatch(sdiag_protocol, sdiag_protocol));
244 BUILD_BUG_ON(__offset_mismatch(idiag_ext, idiag_ext));
245 BUILD_BUG_ON(__offset_mismatch(pad, sdiag_raw_protocol));
246 BUILD_BUG_ON(__offset_mismatch(idiag_states, idiag_states));
247 BUILD_BUG_ON(__offset_mismatch(id, id));
248 #undef __offset_mismatch
249 }
250
251 static int __init raw_diag_init(void)
252 {
253 return inet_diag_register(&raw_diag_handler);
254 }
255
256 static void __exit raw_diag_exit(void)
257 {
258 inet_diag_unregister(&raw_diag_handler);
259 }
260
261 module_init(raw_diag_init);
262 module_exit(raw_diag_exit);
263 MODULE_LICENSE("GPL");
264 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-255 );
265 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10-255 );