| /* |
| * net/tipc/netlink.c: TIPC configuration handling |
| * |
| * Copyright (c) 2005, Wind River Systems |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the names of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core.h" |
| #include "config.h" |
| #include <net/genetlink.h> |
| |
| static int handle_cmd(struct sk_buff *skb, struct genl_info *info) |
| { |
| struct sk_buff *rep_buf; |
| struct nlmsghdr *rep_nlh; |
| struct nlmsghdr *req_nlh = info->nlhdr; |
| struct tipc_genlmsghdr *req_userhdr = info->userhdr; |
| int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN); |
| |
| if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN))) |
| rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN); |
| else |
| rep_buf = cfg_do_cmd(req_userhdr->dest, |
| req_userhdr->cmd, |
| NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN, |
| NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN), |
| hdr_space); |
| |
| if (rep_buf) { |
| skb_push(rep_buf, hdr_space); |
| rep_nlh = (struct nlmsghdr *)rep_buf->data; |
| memcpy(rep_nlh, req_nlh, hdr_space); |
| rep_nlh->nlmsg_len = rep_buf->len; |
| genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid); |
| } |
| |
| return 0; |
| } |
| |
| static struct genl_family family = { |
| .id = GENL_ID_GENERATE, |
| .name = TIPC_GENL_NAME, |
| .version = TIPC_GENL_VERSION, |
| .hdrsize = TIPC_GENL_HDRLEN, |
| .maxattr = 0, |
| .owner = THIS_MODULE, |
| }; |
| |
| static struct genl_ops ops = { |
| .cmd = TIPC_GENL_CMD, |
| .doit = handle_cmd, |
| }; |
| |
| static int family_registered = 0; |
| |
| int netlink_start(void) |
| { |
| |
| |
| if (genl_register_family(&family)) |
| goto err; |
| |
| family_registered = 1; |
| |
| if (genl_register_ops(&family, &ops)) |
| goto err_unregister; |
| |
| return 0; |
| |
| err_unregister: |
| genl_unregister_family(&family); |
| family_registered = 0; |
| err: |
| err("Failed to register netlink interface\n"); |
| return -EFAULT; |
| } |
| |
| void netlink_stop(void) |
| { |
| if (family_registered) { |
| genl_unregister_family(&family); |
| family_registered = 0; |
| } |
| } |