src/lxc/rtnl.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <daniel.lezcano at free.fr>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #ifndef _GNU_SOURCE
  25 #define _GNU_SOURCE 1
  26 #endif
  27 #include <errno.h>
  28 #include <linux/netlink.h>
  29 #include <linux/rtnetlink.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <sys/socket.h>
  34 #include <unistd.h>
  35
  36 #include "config.h"
  37 #include "nl.h"
  38 #include "rtnl.h"
  39
  40 extern int rtnetlink_open(struct rtnl_handler *handler)
  41 {
  42         return netlink_open(&handler->nlh, NETLINK_ROUTE);
  43 }
  44
  45 extern int rtnetlink_close(struct rtnl_handler *handler)
  46 {
  47         return netlink_close(&handler->nlh);
  48 }
  49
  50 #pragma GCC diagnostic push
  51 #pragma GCC diagnostic ignored "-Wcast-align"
  52
  53 extern int rtnetlink_rcv(struct rtnl_handler *handler, struct rtnlmsg *rtnlmsg)
  54 {
  55         return netlink_rcv(&handler->nlh, (struct nlmsg *)&rtnlmsg->nlmsghdr);
  56 }
  57
  58 extern int rtnetlink_send(struct rtnl_handler *handler, struct rtnlmsg *rtnlmsg)
  59 {
  60
  61         return netlink_send(&handler->nlh, (struct nlmsg *)&rtnlmsg->nlmsghdr);
  62 }
  63
  64 extern int rtnetlink_transaction(struct rtnl_handler *handler,
  65                                  struct rtnlmsg *request,
  66                                  struct rtnlmsg *answer)
  67 {
  68         return netlink_transaction(&handler->nlh,
  69                                    (struct nlmsg *)&request->nlmsghdr,
  70                                    (struct nlmsg *)&answer->nlmsghdr);
  71 }
  72
  73 #pragma GCC diagnostic pop
  74
  75 extern struct rtnlmsg *rtnlmsg_alloc(size_t size)
  76 {
  77         /*
  78         size_t len;
  79
  80         len = NLMSG_LENGTH(NLMSG_ALIGN(sizeof(struct rtnlmsghdr))) + size;
  81         return (struct rtnlmsg *)nlmsg_alloc(len);
  82         */
  83
  84         return NULL;
  85 }
  86
  87 extern void rtnlmsg_free(struct rtnlmsg *rtnlmsg) { free(rtnlmsg); }