1 #include <linux/module.h>
4 #include <linux/netlink.h>
5 #include <linux/sock_diag.h>
6 #include <linux/netlink_diag.h>
7 #include <linux/rhashtable.h>
9 #include "af_netlink.h"
11 static int sk_diag_dump_groups(struct sock *sk, struct sk_buff *nlskb)
13 struct netlink_sock *nlk = nlk_sk(sk);
15 if (nlk->groups == NULL)
18 return nla_put(nlskb, NETLINK_DIAG_GROUPS, NLGRPSZ(nlk->ngroups),
22 static int sk_diag_put_flags(struct sock *sk, struct sk_buff *skb)
24 struct netlink_sock *nlk = nlk_sk(sk);
28 flags |= NDIAG_FLAG_CB_RUNNING;
29 if (nlk->flags & NETLINK_F_RECV_PKTINFO)
30 flags |= NDIAG_FLAG_PKTINFO;
31 if (nlk->flags & NETLINK_F_BROADCAST_SEND_ERROR)
32 flags |= NDIAG_FLAG_BROADCAST_ERROR;
33 if (nlk->flags & NETLINK_F_RECV_NO_ENOBUFS)
34 flags |= NDIAG_FLAG_NO_ENOBUFS;
35 if (nlk->flags & NETLINK_F_LISTEN_ALL_NSID)
36 flags |= NDIAG_FLAG_LISTEN_ALL_NSID;
37 if (nlk->flags & NETLINK_F_CAP_ACK)
38 flags |= NDIAG_FLAG_CAP_ACK;
40 return nla_put_u32(skb, NETLINK_DIAG_FLAGS, flags);
43 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
44 struct netlink_diag_req *req,
45 u32 portid, u32 seq, u32 flags, int sk_ino)
48 struct netlink_diag_msg *rep;
49 struct netlink_sock *nlk = nlk_sk(sk);
51 nlh = nlmsg_put(skb, portid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rep),
56 rep = nlmsg_data(nlh);
57 rep->ndiag_family = AF_NETLINK;
58 rep->ndiag_type = sk->sk_type;
59 rep->ndiag_protocol = sk->sk_protocol;
60 rep->ndiag_state = sk->sk_state;
62 rep->ndiag_ino = sk_ino;
63 rep->ndiag_portid = nlk->portid;
64 rep->ndiag_dst_portid = nlk->dst_portid;
65 rep->ndiag_dst_group = nlk->dst_group;
66 sock_diag_save_cookie(sk, rep->ndiag_cookie);
68 if ((req->ndiag_show & NDIAG_SHOW_GROUPS) &&
69 sk_diag_dump_groups(sk, skb))
72 if ((req->ndiag_show & NDIAG_SHOW_MEMINFO) &&
73 sock_diag_put_meminfo(sk, skb, NETLINK_DIAG_MEMINFO))
76 if ((req->ndiag_show & NDIAG_SHOW_FLAGS) &&
77 sk_diag_put_flags(sk, skb))
84 nlmsg_cancel(skb, nlh);
88 static int __netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
89 int protocol, int s_num)
91 struct rhashtable_iter *hti = (void *)cb->args[2];
92 struct netlink_table *tbl = &nl_table[protocol];
93 struct net *net = sock_net(skb->sk);
94 struct netlink_diag_req *req;
95 struct netlink_sock *nlsk;
101 req = nlmsg_data(cb->nlh);
109 hti = kmalloc(sizeof(*hti), GFP_KERNEL);
113 cb->args[2] = (long)hti;
117 rhashtable_walk_enter(&tbl->hash, hti);
119 ret = rhashtable_walk_start(hti);
125 while ((nlsk = rhashtable_walk_next(hti))) {
128 if (ret == -EAGAIN) {
135 sk = (struct sock *)nlsk;
137 if (!net_eq(sock_net(sk), net))
140 if (sk_diag_fill(sk, skb, req,
141 NETLINK_CB(cb->skb).portid,
144 sock_i_ino(sk)) < 0) {
151 rhashtable_walk_stop(hti);
155 rhashtable_walk_exit(hti);
159 read_lock_irqsave(&nl_table_lock, flags);
160 sk_for_each_bound(sk, &tbl->mc_list) {
163 if (!net_eq(sock_net(sk), net))
170 if (sk_diag_fill(sk, skb, req,
171 NETLINK_CB(cb->skb).portid,
174 __sock_i_ino(sk)) < 0) {
180 read_unlock_irqrestore(&nl_table_lock, flags);
188 static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
190 struct netlink_diag_req *req;
191 int s_num = cb->args[0];
194 req = nlmsg_data(cb->nlh);
196 if (req->sdiag_protocol == NDIAG_PROTO_ALL) {
199 for (i = cb->args[1]; i < MAX_LINKS; i++) {
200 err = __netlink_diag_dump(skb, cb, i, s_num);
207 if (req->sdiag_protocol >= MAX_LINKS)
210 err = __netlink_diag_dump(skb, cb, req->sdiag_protocol, s_num);
213 return err < 0 ? err : skb->len;
216 static int netlink_diag_dump_done(struct netlink_callback *cb)
218 struct rhashtable_iter *hti = (void *)cb->args[2];
220 if (cb->args[0] == 1)
221 rhashtable_walk_exit(hti);
228 static int netlink_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
230 int hdrlen = sizeof(struct netlink_diag_req);
231 struct net *net = sock_net(skb->sk);
233 if (nlmsg_len(h) < hdrlen)
236 if (h->nlmsg_flags & NLM_F_DUMP) {
237 struct netlink_dump_control c = {
238 .dump = netlink_diag_dump,
239 .done = netlink_diag_dump_done,
241 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
246 static const struct sock_diag_handler netlink_diag_handler = {
247 .family = AF_NETLINK,
248 .dump = netlink_diag_handler_dump,
251 static int __init netlink_diag_init(void)
253 return sock_diag_register(&netlink_diag_handler);
256 static void __exit netlink_diag_exit(void)
258 sock_diag_unregister(&netlink_diag_handler);
261 module_init(netlink_diag_init);
262 module_exit(netlink_diag_exit);
263 MODULE_LICENSE("GPL");
264 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 16 /* AF_NETLINK */);