1 #include <linux/module.h>
2 #include <linux/sock_diag.h>
4 #include <linux/packet_diag.h>
5 #include <net/net_namespace.h>
10 static int pdiag_put_info(const struct packet_sock *po, struct sk_buff *nlskb)
12 struct packet_diag_info pinfo;
14 pinfo.pdi_index = po->ifindex;
15 pinfo.pdi_version = po->tp_version;
16 pinfo.pdi_reserve = po->tp_reserve;
17 pinfo.pdi_copy_thresh = po->copy_thresh;
18 pinfo.pdi_tstamp = po->tp_tstamp;
22 pinfo.pdi_flags |= PDI_RUNNING;
24 pinfo.pdi_flags |= PDI_AUXDATA;
26 pinfo.pdi_flags |= PDI_ORIGDEV;
28 pinfo.pdi_flags |= PDI_VNETHDR;
30 pinfo.pdi_flags |= PDI_LOSS;
32 return nla_put(nlskb, PACKET_DIAG_INFO, sizeof(pinfo), &pinfo);
35 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag_req *req,
36 u32 pid, u32 seq, u32 flags, int sk_ino)
39 struct packet_diag_msg *rp;
40 const struct packet_sock *po = pkt_sk(sk);
42 nlh = nlmsg_put(skb, pid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rp), flags);
47 rp->pdiag_family = AF_PACKET;
48 rp->pdiag_type = sk->sk_type;
49 rp->pdiag_num = ntohs(po->num);
50 rp->pdiag_ino = sk_ino;
51 sock_diag_save_cookie(sk, rp->pdiag_cookie);
53 if ((req->pdiag_show & PACKET_SHOW_INFO) &&
54 pdiag_put_info(po, skb))
57 return nlmsg_end(skb, nlh);
60 nlmsg_cancel(skb, nlh);
64 static int packet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
66 int num = 0, s_num = cb->args[0];
67 struct packet_diag_req *req;
70 struct hlist_node *node;
72 net = sock_net(skb->sk);
73 req = nlmsg_data(cb->nlh);
76 sk_for_each_rcu(sk, node, &net->packet.sklist) {
77 if (!net_eq(sock_net(sk), net))
82 if (sk_diag_fill(sk, skb, req, NETLINK_CB(cb->skb).pid,
83 cb->nlh->nlmsg_seq, NLM_F_MULTI,
96 static int packet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
98 int hdrlen = sizeof(struct packet_diag_req);
99 struct net *net = sock_net(skb->sk);
100 struct packet_diag_req *req;
102 if (nlmsg_len(h) < hdrlen)
106 /* Make it possible to support protocol filtering later */
107 if (req->sdiag_protocol)
110 if (h->nlmsg_flags & NLM_F_DUMP) {
111 struct netlink_dump_control c = {
112 .dump = packet_diag_dump,
114 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
119 static const struct sock_diag_handler packet_diag_handler = {
121 .dump = packet_diag_handler_dump,
124 static int __init packet_diag_init(void)
126 return sock_diag_register(&packet_diag_handler);
129 static void __exit packet_diag_exit(void)
131 sock_diag_unregister(&packet_diag_handler);
134 module_init(packet_diag_init);
135 module_exit(packet_diag_exit);
136 MODULE_LICENSE("GPL");
137 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 17 /* AF_PACKET */);