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net/tipc/netlink.c
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/* * net/tipc/netlink.c: TIPC configuration handling |
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* |
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* Copyright (c) 2005-2006, Ericsson AB |
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* Copyright (c) 2005-2007, Wind River Systems |
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* All rights reserved. * |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: * |
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* 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. |
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* |
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* 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 |
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* 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; |
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int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN); |
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u16 cmd; |
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if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN))) |
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cmd = TIPC_CMD_NOT_NET_ADMIN; |
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else |
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cmd = req_userhdr->cmd; rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd, NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN, NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN), hdr_space); |
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if (rep_buf) { skb_push(rep_buf, hdr_space); |
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rep_nlh = nlmsg_hdr(rep_buf); |
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memcpy(rep_nlh, req_nlh, hdr_space); rep_nlh->nlmsg_len = rep_buf->len; |
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genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).pid); |
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} |
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return 0; |
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} |
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static struct genl_family tipc_genl_family = { |
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.id = GENL_ID_GENERATE, .name = TIPC_GENL_NAME, .version = TIPC_GENL_VERSION, .hdrsize = TIPC_GENL_HDRLEN, .maxattr = 0, |
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}; |
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static struct genl_ops tipc_genl_ops = { |
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.cmd = TIPC_GENL_CMD, .doit = handle_cmd, }; |
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static int tipc_genl_family_registered; |
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int tipc_netlink_start(void) |
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{ |
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int res; |
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res = genl_register_family_with_ops(&tipc_genl_family, &tipc_genl_ops, 1); if (res) { err("Failed to register netlink interface "); return res; } |
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tipc_genl_family_registered = 1; |
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return 0; |
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} |
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void tipc_netlink_stop(void) |
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{ |
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if (!tipc_genl_family_registered) return; genl_unregister_family(&tipc_genl_family); tipc_genl_family_registered = 0; |
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} |