2 * net/tipc/netlink.c: TIPC configuration handling
4 * Copyright (c) 2005, Wind River Systems
5 * Copyright (c) 2005-2006, Ericsson AB
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9 * modification, are permitted provided that the following conditions are met:
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18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
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39 #include <net/genetlink.h>
41 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
43 struct sk_buff *rep_buf;
44 struct nlmsghdr *rep_nlh;
45 struct nlmsghdr *req_nlh = info->nlhdr;
46 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
47 int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
49 if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
50 rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
52 rep_buf = cfg_do_cmd(req_userhdr->dest,
54 NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
55 NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
59 skb_push(rep_buf, hdr_space);
60 rep_nlh = (struct nlmsghdr *)rep_buf->data;
61 memcpy(rep_nlh, req_nlh, hdr_space);
62 rep_nlh->nlmsg_len = rep_buf->len;
63 genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid);
69 static struct genl_family family = {
70 .id = GENL_ID_GENERATE,
71 .name = TIPC_GENL_NAME,
72 .version = TIPC_GENL_VERSION,
73 .hdrsize = TIPC_GENL_HDRLEN,
78 static struct genl_ops ops = {
83 static int family_registered = 0;
85 int netlink_start(void)
89 if (genl_register_family(&family))
92 family_registered = 1;
94 if (genl_register_ops(&family, &ops))
100 genl_unregister_family(&family);
101 family_registered = 0;
103 err("Failed to register netlink interface");
107 void netlink_stop(void)
109 if (family_registered) {
110 genl_unregister_family(&family);
111 family_registered = 0;