diff options
Diffstat (limited to 'net/tipc/netlink.c')
-rw-r--r-- | net/tipc/netlink.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c new file mode 100644 index 00000000000..19b3f402253 --- /dev/null +++ b/net/tipc/netlink.c @@ -0,0 +1,112 @@ +/* + * net/tipc/netlink.c: TIPC configuration handling + * + * Copyright (c) 2005-2006, Ericsson AB + * 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, +}; + +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; + } +} |