Add RA-handling support

[odhcp6c.git] / src / rtnetlink.c

diff --git a/src/rtnetlink.c b/src/rtnetlink.c
deleted file mode 100644 (file)
index 6017aab..0000000
--- a/src/rtnetlink.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/**
- * Copyright (C) 2012 Steven Barth <steven@midlink.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License v2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <time.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <stdbool.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <linux/rtnetlink.h>
-
-#include "odhcp6c.h"
-
-
-static int sock = -1;
-static unsigned seq = 0;
-
-
-// Init rtnetlink socket
-int init_rtnetlink(void)
-{
-       sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
-       struct sockaddr_nl rtnl_kernel = { .nl_family = AF_NETLINK };
-       if (connect(sock, (struct sockaddr*)&rtnl_kernel, sizeof(rtnl_kernel)))
-               return -1;
-
-       return 0;
-}
-
-
-// CRUD addresses to interface
-int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
-               uint32_t pref, uint32_t valid)
-{
-       int flags = NLM_F_REQUEST | NLM_F_ACK;
-       int cmd = RTM_DELADDR;
-
-       if (valid) {
-               flags |= NLM_F_CREATE | NLM_F_REPLACE;
-               cmd = RTM_NEWADDR;
-       }
-
-       struct {
-               struct nlmsghdr nhm;
-               struct ifaddrmsg ifa;
-               struct rtattr rta_addr;
-               struct in6_addr addr;
-               struct rtattr rta_local;
-               struct in6_addr local;
-               struct rtattr rta_info;
-               struct ifa_cacheinfo info;
-       } req = {
-               {sizeof(req), cmd, flags, ++seq, 0},
-               {AF_INET6, 128, 0, RT_SCOPE_UNIVERSE, ifindex},
-               {sizeof(req.rta_addr) + sizeof(req.addr), IFA_ADDRESS},
-               *addr,
-               {sizeof(req.rta_local) + sizeof(req.local), IFA_LOCAL},
-               *addr,
-               {sizeof(req.rta_info) + sizeof(req.info), IFA_CACHEINFO},
-               {pref, valid, 0, 0}
-       };
-       send(sock, &req, sizeof(req), 0);
-
-       struct {
-               struct nlmsghdr nhm;
-               struct nlmsgerr err;
-       } reply;
-       recv(sock, &reply, sizeof(reply), 0);
-
-       char buf[INET6_ADDRSTRLEN];
-       inet_ntop(AF_INET6, addr, buf, sizeof(buf));
-       syslog(LOG_WARNING, "%s address %s/128 for iface %i: %s",
-                       (valid) ? "assigning" : "removing", buf,
-                       ifindex, strerror(-reply.err.error));
-
-       if (reply.err.error < 0 || valid == 0)
-               return reply.err.error;
-
-       // Check for duplicate addresses
-       struct timespec ts = {1, 0};
-       nanosleep(&ts, NULL);
-
-       req.nhm.nlmsg_type = RTM_GETADDR;
-       req.nhm.nlmsg_seq = ++seq;
-       req.nhm.nlmsg_flags = NLM_F_REQUEST;
-       send(sock, &req, sizeof(req), 0);
-
-       struct {
-               struct nlmsghdr nhm;
-               struct ifaddrmsg ifa;
-               uint8_t buf[1024];
-       } dad_reply;
-       recv(sock, &dad_reply, sizeof(dad_reply), 0);
-
-       if (dad_reply.nhm.nlmsg_type != RTM_NEWADDR ||
-                       (dad_reply.ifa.ifa_flags & IFA_F_DADFAILED)) {
-               syslog(LOG_WARNING, "Removing duplicate address %s", buf);
-               set_rtnetlink_addr(ifindex, addr, 0, 0);
-               return -EADDRNOTAVAIL;
-       }
-       return 0;
-}