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/*
*
* Authors:
* Lars Fenneberg <lf@elemental.net>
* Reuben Hawkins <reubenhwk@gmail.com>
*
* This software is Copyright 1996,1997 by the above mentioned author(s),
* All Rights Reserved.
*
* The license which is distributed with this software in the file COPYRIGHT
* applies to this software. If your distribution is missing this file, you
* may request it from <pekkas@netcore.fi>.
*
*/
#include "config.h"
#include "radvd.h"
#include "log.h"
#include "netlink.h"
#include <asm/types.h>
#include <sys/socket.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <net/if.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
void process_netlink_msg(int sock)
{
int len;
char buf[4096];
struct iovec iov = { buf, sizeof(buf) };
struct sockaddr_nl sa;
struct msghdr msg = { (void *)&sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
struct nlmsghdr *nh;
struct ifinfomsg * ifinfo;
char ifname[IF_NAMESIZE] = {""};
len = recvmsg (sock, &msg, 0);
if (len == -1) {
flog(LOG_ERR, "recvmsg failed: %s", strerror(errno));
}
for (nh = (struct nlmsghdr *) buf; NLMSG_OK (nh, len); nh = NLMSG_NEXT (nh, len)) {
/* The end of multipart message. */
if (nh->nlmsg_type == NLMSG_DONE)
return;
if (nh->nlmsg_type == NLMSG_ERROR) {
flog(LOG_ERR, "%s:%d Some type of netlink error.\n", __FILE__, __LINE__);
abort();
}
/* Continue with parsing payload. */
ifinfo = NLMSG_DATA(nh);
if_indextoname(ifinfo->ifi_index, ifname);
if (ifinfo->ifi_flags & IFF_RUNNING) {
dlog(LOG_DEBUG, 3, "%s, ifindex %d, flags is running", ifname, ifinfo->ifi_index);
}
else {
dlog(LOG_DEBUG, 3, "%s, ifindex %d, flags is *NOT* running", ifname, ifinfo->ifi_index);
}
reload_config();
}
}
int netlink_socket(void)
{
int rc, sock;
struct sockaddr_nl snl;
sock = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1) {
flog(LOG_ERR, "Unable to open netlink socket: %s", strerror(errno));
}
memset(&snl, 0, sizeof(snl));
snl.nl_family = AF_NETLINK;
snl.nl_groups = RTMGRP_LINK;
rc = bind(sock, (struct sockaddr*)&snl, sizeof(snl));
if (rc == -1) {
flog(LOG_ERR, "Unable to bind netlink socket: %s", strerror(errno));
close(sock);
sock = -1;
}
return sock;
}
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