lib/tun: split generic network device related stuff to lib/netdev

Change-Id: Ib021e392637a43d5cf1b40e0d50621fe7e854ba5

5 files changed, 842 insertions, 755 deletions

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 632990c..55348ad 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1,7 +1,7 @@
 noinst_LIBRARIES = libmisc.a
 
-noinst_HEADERS = gnugetopt.h ippool.h lookup.h syserr.h tun.h in46_addr.h
+noinst_HEADERS = gnugetopt.h ippool.h lookup.h syserr.h tun.h in46_addr.h netdev.h
 
 AM_CFLAGS = -O2 -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb $(LIBOSMOCORE_CFLAGS)
 
-libmisc_a_SOURCES = getopt1.c getopt.c ippool.c lookup.c tun.c debug.c in46_addr.c
+libmisc_a_SOURCES = getopt1.c getopt.c ippool.c lookup.c tun.c debug.c in46_addr.c netdev.c
diff --git a/lib/netdev.c b/lib/netdev.c
new file mode 100644
index 0000000..eff808d
--- /dev/null
+++ b/lib/netdev.c
@@ -0,0 +1,766 @@
+/*
+ * TUN interface functions.
+ * Copyright (C) 2002, 2003, 2004 Mondru AB.
+ * Copyright (C) 2017-2018 by Harald Welte <laforge@gnumonks.org>
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ */
+
+/*
+ * netdev.c: Contains generic network device related functionality.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <net/route.h>
+#include <net/if.h>
+
+#if defined(__linux__)
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+#elif defined (__FreeBSD__)
+#include <net/if_var.h>
+#include <netinet/in_var.h>
+
+#elif defined (__APPLE__)
+#include <net/if.h>
+
+#else
+#error  "Unknown platform!"
+#endif
+
+#include "netdev.h"
+#include "syserr.h"
+
+#if defined(__linux__)
+
+#include <linux/ipv6.h>
+
+static int netdev_nlattr(struct nlmsghdr *n, int nsize, int type, void *d, int dlen)
+{
+	int len = RTA_LENGTH(dlen);
+	int alen = NLMSG_ALIGN(n->nlmsg_len);
+	struct rtattr *rta = (struct rtattr *)(((void *)n) + alen);
+	if (alen + len > nsize)
+		return -1;
+	rta->rta_len = len;
+	rta->rta_type = type;
+	memcpy(RTA_DATA(rta), d, dlen);
+	n->nlmsg_len = alen + len;
+	return 0;
+}
+#endif
+
+static int netdev_sifflags(const char *devname, int flags)
+{
+	struct ifreq ifr;
+	int fd;
+
+	memset(&ifr, '\0', sizeof(ifr));
+	ifr.ifr_flags = flags;
+	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
+	ifr.ifr_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+	if (ioctl(fd, SIOCSIFFLAGS, &ifr)) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno,
+			"ioctl(SIOCSIFFLAGS) failed");
+		close(fd);
+		return -1;
+	}
+	close(fd);
+	return 0;
+}
+
+int netdev_setaddr4(const char *devname, struct in_addr *addr,
+		    struct in_addr *dstaddr, struct in_addr *netmask)
+{
+	struct ifreq ifr;
+	int fd;
+
+	memset(&ifr, '\0', sizeof(ifr));
+	ifr.ifr_addr.sa_family = AF_INET;
+	ifr.ifr_dstaddr.sa_family = AF_INET;
+
+#if defined(__linux__)
+	ifr.ifr_netmask.sa_family = AF_INET;
+
+#elif defined(__FreeBSD__) || defined (__APPLE__)
+	((struct sockaddr_in *)&ifr.ifr_addr)->sin_len =
+	    sizeof(struct sockaddr_in);
+	((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_len =
+	    sizeof(struct sockaddr_in);
+#endif
+
+	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
+	ifr.ifr_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
+
+	/* Create a channel to the NET kernel. */
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	if (addr) {		/* Set the interface address */
+		memcpy(&((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr, addr,
+		       sizeof(*addr));
+		if (ioctl(fd, SIOCSIFADDR, (void *)&ifr) < 0) {
+			if (errno != EEXIST) {
+				SYS_ERR(DTUN, LOGL_ERROR, errno,
+					"ioctl(SIOCSIFADDR) failed");
+			} else {
+				SYS_ERR(DTUN, LOGL_NOTICE, errno,
+					"ioctl(SIOCSIFADDR): Address already exists");
+			}
+			close(fd);
+			return -1;
+		}
+	}
+
+	if (dstaddr) {		/* Set the destination address */
+		memcpy(&((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_addr,
+		       dstaddr, sizeof(*dstaddr));
+		if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t) & ifr) < 0) {
+			SYS_ERR(DTUN, LOGL_ERROR, errno,
+				"ioctl(SIOCSIFDSTADDR) failed");
+			close(fd);
+			return -1;
+		}
+	}
+
+	if (netmask) {		/* Set the netmask */
+#if defined(__linux__)
+		memcpy(&((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr,
+		       netmask, sizeof(*netmask));
+
+#elif defined(__FreeBSD__) || defined (__APPLE__)
+		((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr =
+		    netmask->s_addr;
+#endif
+
+		if (ioctl(fd, SIOCSIFNETMASK, (void *)&ifr) < 0) {
+			SYS_ERR(DTUN, LOGL_ERROR, errno,
+				"ioctl(SIOCSIFNETMASK) failed");
+			close(fd);
+			return -1;
+		}
+	}
+
+	close(fd);
+
+	/* On linux the route to the interface is set automatically
+	   on FreeBSD we have to do this manually */
+
+	/* TODO: How does it work on Solaris? */
+
+	netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
+
+#if defined(__FreeBSD__) || defined (__APPLE__)
+	netdev_addroute(dstaddr, addr, &this->netmask);
+#endif
+
+	return 0;
+}
+
+int netdev_setaddr6(const char *devname, struct in6_addr *addr, struct in6_addr *dstaddr,
+		    size_t prefixlen)
+{
+	struct in6_ifreq ifr;
+	int fd;
+
+	memset(&ifr, 0, sizeof(ifr));
+
+#if defined(__linux__)
+	ifr.ifr6_prefixlen = prefixlen;
+	ifr.ifr6_ifindex = if_nametoindex(devname);
+	if (ifr.ifr6_ifindex == 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0, "Error getting ifindex for %s\n", devname);
+		return -1;
+	}
+#elif defined(__FreeBSD__) || defined (__APPLE__)
+	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
+#endif
+
+	/* Create a channel to the NET kernel */
+	if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0, "socket() failed");
+		return -1;
+	}
+
+#if defined(__linux__)
+	if (addr) {
+		memcpy(&ifr.ifr6_addr, addr, sizeof(*addr));
+		if (ioctl(fd, SIOCSIFADDR, (void *) &ifr) < 0) {
+			if (errno != EEXIST) {
+				SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR) failed");
+			} else {
+				SYS_ERR(DTUN, LOGL_NOTICE, 0, "ioctl(SIOCSIFADDR): Address already exists");
+			}
+			close(fd);
+			return -1;
+		}
+	}
+
+#if 0
+	/* FIXME: looks like this is not possible/necessary for IPv6? */
+	if (dstaddr) {
+		memcpy(&ifr.ifr6_addr, dstaddr, sizeof(*dstaddr));
+		if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t *) &ifr) < 0) {
+			SYS_ERR(DTUN, LOGL_ERROR, "ioctl(SIOCSIFDSTADDR) failed");
+			close(fd);
+			return -1;
+		}
+	}
+#endif
+
+#elif defined(__FreeBSD__) || defined (__APPLE__)
+	if (addr)
+		memcpy(&ifr.ifr_ifru.ifru_addr, addr, sizeof(ifr.ifr_ifru.ifru_addr));
+	if (dstaddr)
+		memcpy(&ifr.ifr_ifru.ifru_dstaddr, dstaddr, sizeof(ifr.ifr_ifru.ifru_dstaddr));
+
+	if (ioctl(fd, SIOCSIFADDR_IN6, (struct ifreq *)&ifr) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR_IN6) failed");
+		close(fd);
+		return -1;
+	}
+#endif
+
+	close(fd);
+
+	/* On linux the route to the interface is set automatically
+	   on FreeBSD we have to do this manually */
+
+	/* TODO: How does it work on Solaris? */
+
+	netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
+
+#if 0	/* FIXME */
+//#if defined(__FreeBSD__) || defined (__APPLE__)
+	netdev_addroute6(dstaddr, addr, prefixlen);
+#endif
+
+	return 0;
+}
+
+int netdev_addaddr4(const char *devname, struct in_addr *addr,
+		    struct in_addr *dstaddr, struct in_addr *netmask)
+{
+
+#if defined(__linux__)
+	struct {
+		struct nlmsghdr n;
+		struct ifaddrmsg i;
+		char buf[TUN_NLBUFSIZE];
+	} req;
+
+	struct sockaddr_nl local;
+	socklen_t addr_len;
+	int fd;
+	int status;
+
+	struct sockaddr_nl nladdr;
+	struct iovec iov;
+	struct msghdr msg;
+
+	memset(&req, 0, sizeof(req));
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
+	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
+	req.n.nlmsg_type = RTM_NEWADDR;
+	req.i.ifa_family = AF_INET;
+	req.i.ifa_prefixlen = 32;	/* 32 FOR IPv4 */
+	req.i.ifa_flags = 0;
+	req.i.ifa_scope = RT_SCOPE_HOST;	/* TODO or 0 */
+	req.i.ifa_index = if_nametoindex(devname);
+	if (!req.i.ifa_index) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "Unable to get ifindex for %s", devname);
+		return -1;
+	}
+
+	netdev_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(*addr));
+	if (dstaddr)
+		netdev_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(*dstaddr));
+
+	if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	memset(&local, 0, sizeof(local));
+	local.nl_family = AF_NETLINK;
+	local.nl_groups = 0;
+
+	if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "bind() failed");
+		close(fd);
+		return -1;
+	}
+
+	addr_len = sizeof(local);
+	if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno,
+			"getsockname() failed");
+		close(fd);
+		return -1;
+	}
+
+	if (addr_len != sizeof(local)) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0,
+			"Wrong address length %d", addr_len);
+		close(fd);
+		return -1;
+	}
+
+	if (local.nl_family != AF_NETLINK) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0,
+			"Wrong address family %d", local.nl_family);
+		close(fd);
+		return -1;
+	}
+
+	iov.iov_base = (void *)&req.n;
+	iov.iov_len = req.n.nlmsg_len;
+
+	msg.msg_name = (void *)&nladdr;
+	msg.msg_namelen = sizeof(nladdr);
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = NULL;
+	msg.msg_controllen = 0;
+	msg.msg_flags = 0;
+
+	memset(&nladdr, 0, sizeof(nladdr));
+	nladdr.nl_family = AF_NETLINK;
+	nladdr.nl_pid = 0;
+	nladdr.nl_groups = 0;
+
+	req.n.nlmsg_seq = 0;
+	req.n.nlmsg_flags |= NLM_F_ACK;
+
+	status = sendmsg(fd, &msg, 0);
+	if (status != req.n.nlmsg_len) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "sendmsg() failed, returned %d", status);
+		close(fd);
+		return -1;
+	}
+
+	status = netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
+	if (status == -1) {
+		close(fd);
+		return -1;
+	}
+
+
+	close(fd);
+	return 0;
+
+#elif defined (__FreeBSD__) || defined (__APPLE__)
+
+	int fd;
+	struct ifaliasreq areq;
+
+	memset(&areq, 0, sizeof(areq));
+
+	/* Set up interface name */
+	strncpy(areq.ifra_name, devname, IFNAMSIZ);
+	areq.ifra_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
+
+	((struct sockaddr_in *)&areq.ifra_addr)->sin_family = AF_INET;
+	((struct sockaddr_in *)&areq.ifra_addr)->sin_len =
+	    sizeof(areq.ifra_addr);
+	((struct sockaddr_in *)&areq.ifra_addr)->sin_addr.s_addr = addr->s_addr;
+
+	((struct sockaddr_in *)&areq.ifra_mask)->sin_family = AF_INET;
+	((struct sockaddr_in *)&areq.ifra_mask)->sin_len =
+	    sizeof(areq.ifra_mask);
+	((struct sockaddr_in *)&areq.ifra_mask)->sin_addr.s_addr =
+	    netmask->s_addr;
+
+	/* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */
+	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_family = AF_INET;
+	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_len =
+	    sizeof(areq.ifra_broadaddr);
+	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_addr.s_addr =
+	    dstaddr->s_addr;
+
+	/* Create a channel to the NET kernel. */
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno,
+			"ioctl(SIOCAIFADDR) failed");
+		close(fd);
+		return -1;
+	}
+
+	close(fd);
+	return 0;
+
+#endif
+
+}
+
+int netdev_addaddr6(const char *devname, struct in6_addr *addr,
+		    struct in6_addr *dstaddr, int prefixlen)
+{
+
+#if defined(__linux__)
+	struct {
+		struct nlmsghdr n;
+		struct ifaddrmsg i;
+		char buf[TUN_NLBUFSIZE];
+	} req;
+
+	struct sockaddr_nl local;
+	socklen_t addr_len;
+	int fd;
+	int status;
+
+	struct sockaddr_nl nladdr;
+	struct iovec iov;
+	struct msghdr msg;
+
+	memset(&req, 0, sizeof(req));
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
+	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
+	req.n.nlmsg_type = RTM_NEWADDR;
+	req.i.ifa_family = AF_INET6;
+	req.i.ifa_prefixlen = 64;	/* 64 FOR IPv6 */
+	req.i.ifa_flags = 0;
+	req.i.ifa_scope = RT_SCOPE_HOST;	/* TODO or 0 */
+	req.i.ifa_index = if_nametoindex(devname);
+	if (!req.i.ifa_index) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "Unable to get ifindex for %s", devname);
+		return -1;
+	}
+
+	netdev_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(*addr));
+	if (dstaddr)
+		netdev_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(*dstaddr));
+
+	if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	memset(&local, 0, sizeof(local));
+	local.nl_family = AF_NETLINK;
+	local.nl_groups = 0;
+
+	if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "bind() failed");
+		close(fd);
+		return -1;
+	}
+
+	addr_len = sizeof(local);
+	if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno,
+			"getsockname() failed");
+		close(fd);
+		return -1;
+	}
+
+	if (addr_len != sizeof(local)) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0,
+			"Wrong address length %d", addr_len);
+		close(fd);
+		return -1;
+	}
+
+	if (local.nl_family != AF_NETLINK) {
+		SYS_ERR(DTUN, LOGL_ERROR, 0,
+			"Wrong address family %d", local.nl_family);
+		close(fd);
+		return -1;
+	}
+
+	iov.iov_base = (void *)&req.n;
+	iov.iov_len = req.n.nlmsg_len;
+
+	msg.msg_name = (void *)&nladdr;
+	msg.msg_namelen = sizeof(nladdr);
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = NULL;
+	msg.msg_controllen = 0;
+	msg.msg_flags = 0;
+
+	memset(&nladdr, 0, sizeof(nladdr));
+	nladdr.nl_family = AF_NETLINK;
+	nladdr.nl_pid = 0;
+	nladdr.nl_groups = 0;
+
+	req.n.nlmsg_seq = 0;
+	req.n.nlmsg_flags |= NLM_F_ACK;
+
+	status = sendmsg(fd, &msg, 0);
+	if (status != req.n.nlmsg_len) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "sendmsg() failed, returned %d", status);
+		close(fd);
+		return -1;
+	}
+
+	status = netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
+	if (status == -1) {
+		close(fd);
+		return -1;
+	}
+
+
+	close(fd);
+	return 0;
+
+#elif defined (__FreeBSD__) || defined (__APPLE__)
+
+	int fd;
+	struct ifaliasreq areq;
+
+	memset(&areq, 0, sizeof(areq));
+
+	/* Set up interface name */
+	strncpy(areq.ifra_name, devname, IFNAMSIZ);
+	areq.ifra_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
+
+	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_family = AF_INET6;
+	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_len = sizeof(areq.ifra_addr);
+	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_addr.s6_addr = addr->s6_addr;
+
+	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_family = AF_INET6;
+	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_len = sizeof(areq.ifra_mask);
+	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_addr.s6_addr = netmask->s6_addr;
+
+	/* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */
+	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_family = AF_INET6;
+	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_len = sizeof(areq.ifra_broadaddr);
+	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_addr.s6_addr = dstaddr->s6_addr;
+
+	/* Create a channel to the NET kernel. */
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno,
+			"ioctl(SIOCAIFADDR) failed");
+		close(fd);
+		return -1;
+	}
+
+	close(fd);
+	return 0;
+
+#endif
+
+}
+
+static int netdev_route(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask, int delete)
+{
+
+#if defined(__linux__)
+
+	struct rtentry r;
+	int fd;
+
+	memset(&r, '\0', sizeof(r));
+	r.rt_flags = RTF_UP | RTF_GATEWAY;	/* RTF_HOST not set */
+
+	/* Create a channel to the NET kernel. */
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	r.rt_dst.sa_family = AF_INET;
+	r.rt_gateway.sa_family = AF_INET;
+	r.rt_genmask.sa_family = AF_INET;
+	memcpy(&((struct sockaddr_in *)&r.rt_dst)->sin_addr, dst, sizeof(*dst));
+	memcpy(&((struct sockaddr_in *)&r.rt_gateway)->sin_addr, gateway,
+	       sizeof(*gateway));
+	memcpy(&((struct sockaddr_in *)&r.rt_genmask)->sin_addr, mask,
+	       sizeof(*mask));
+
+	if (delete) {
+		if (ioctl(fd, SIOCDELRT, (void *)&r) < 0) {
+			SYS_ERR(DTUN, LOGL_ERROR, errno,
+				"ioctl(SIOCDELRT) failed");
+			close(fd);
+			return -1;
+		}
+	} else {
+		if (ioctl(fd, SIOCADDRT, (void *)&r) < 0) {
+			SYS_ERR(DTUN, LOGL_ERROR, errno,
+				"ioctl(SIOCADDRT) failed");
+			close(fd);
+			return -1;
+		}
+	}
+	close(fd);
+	return 0;
+
+#elif defined(__FreeBSD__) || defined (__APPLE__)
+
+	struct {
+		struct rt_msghdr rt;
+		struct sockaddr_in dst;
+		struct sockaddr_in gate;
+		struct sockaddr_in mask;
+	} req;
+
+	int fd;
+	struct rt_msghdr *rtm;
+
+	if ((fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
+		return -1;
+	}
+
+	memset(&req, 0x00, sizeof(req));
+
+	rtm = &req.rt;
+
+	rtm->rtm_msglen = sizeof(req);
+	rtm->rtm_version = RTM_VERSION;
+	if (delete) {
+		rtm->rtm_type = RTM_DELETE;
+	} else {
+		rtm->rtm_type = RTM_ADD;
+	}
+	rtm->rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;	/* TODO */
+	rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
+	rtm->rtm_pid = getpid();
+	rtm->rtm_seq = 0044;	/* TODO */
+
+	req.dst.sin_family = AF_INET;
+	req.dst.sin_len = sizeof(req.dst);
+	req.mask.sin_family = AF_INET;
+	req.mask.sin_len = sizeof(req.mask);
+	req.gate.sin_family = AF_INET;
+	req.gate.sin_len = sizeof(req.gate);
+
+	req.dst.sin_addr.s_addr = dst->s_addr;
+	req.mask.sin_addr.s_addr = mask->s_addr;
+	req.gate.sin_addr.s_addr = gateway->s_addr;
+
+	if (write(fd, rtm, rtm->rtm_msglen) < 0) {
+		SYS_ERR(DTUN, LOGL_ERROR, errno, "write() failed");
+		close(fd);
+		return -1;
+	}
+	close(fd);
+	return 0;
+#endif
+
+}
+
+int netdev_addroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask)
+{
+	return netdev_route(dst, gateway, mask, 0);
+}
+
+int netdev_delroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask)
+{
+	return netdev_route(dst, gateway, mask, 1);
+}
+
+#include <ifaddrs.h>
+
+/*! Obtain the local address of a network device
+ *  \param[in] devname Target device owning the IP
+ *  \param[out] prefix_list List of prefix structures to fill with each IPv4/6 and prefix length found.
+ *  \param[in] prefix_size Amount of elements allowed to be fill in the prefix_list array.
+ *  \param[in] flags Specify which kind of IP to look for: IP_TYPE_IPv4, IP_TYPE_IPv6_LINK, IP_TYPE_IPv6_NONLINK
+ *  \returns The number of ips found following the criteria specified by flags, -1 on error.
+ *
+ * This function will fill prefix_list with up to prefix_size IPs following the
+ * criteria specified by flags parameter. It returns the number of IPs matching
+ * the criteria. As a result, the number returned can be bigger than
+ * prefix_size. It can be used with prefix_size=0 to get an estimate of the size
+ * needed for prefix_list.
+ */
+int netdev_ip_local_get(const char *devname, struct in46_prefix *prefix_list, size_t prefix_size, int flags)
+{
+	static const uint8_t ll_prefix[] = { 0xfe,0x80, 0,0, 0,0, 0,0 };
+	struct ifaddrs *ifaddr, *ifa;
+	struct in46_addr netmask;
+	size_t count = 0;
+	bool is_ipv6_ll;
+
+	if (getifaddrs(&ifaddr) == -1) {
+		return -1;
+	}
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr == NULL)
+			continue;
+
+		if (strcmp(ifa->ifa_name, devname))
+			continue;
+
+		if (ifa->ifa_addr->sa_family == AF_INET && (flags & IP_TYPE_IPv4)) {
+			struct sockaddr_in *sin4 = (struct sockaddr_in *) ifa->ifa_addr;
+			struct sockaddr_in *netmask4 = (struct sockaddr_in *) ifa->ifa_netmask;
+
+			if (count < prefix_size) {
+				netmask.len = sizeof(netmask4->sin_addr);
+				netmask.v4 = netmask4->sin_addr;
+				prefix_list[count].addr.len = sizeof(sin4->sin_addr);
+				prefix_list[count].addr.v4 = sin4->sin_addr;
+				prefix_list[count].prefixlen = in46a_netmasklen(&netmask);
+			}
+			count++;
+		}
+
+		if (ifa->ifa_addr->sa_family == AF_INET6 && (flags & IP_TYPE_IPv6)) {
+			struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) ifa->ifa_addr;
+			struct sockaddr_in6 *netmask6 = (struct sockaddr_in6 *) ifa->ifa_netmask;
+
+			is_ipv6_ll = !memcmp(sin6->sin6_addr.s6_addr, ll_prefix, sizeof(ll_prefix));
+			if ((flags & IP_TYPE_IPv6_NONLINK) && is_ipv6_ll)
+				continue;
+			if ((flags & IP_TYPE_IPv6_LINK) && !is_ipv6_ll)
+				continue;
+
+			if (count < prefix_size) {
+				netmask.len = sizeof(netmask6->sin6_addr);
+				netmask.v6 = netmask6->sin6_addr;
+				prefix_list[count].addr.len = sizeof(sin6->sin6_addr);
+				prefix_list[count].addr.v6 = sin6->sin6_addr;
+				prefix_list[count].prefixlen = in46a_netmasklen(&netmask);
+			}
+			count++;
+		}
+	}
+
+	freeifaddrs(ifaddr);
+	return count;
+}
diff --git a/lib/netdev.h b/lib/netdev.h
new file mode 100644
index 0000000..74c42da
--- /dev/null
+++ b/lib/netdev.h
@@ -0,0 +1,72 @@
+#pragma once
+/*
+ * TUN interface functions.
+ * Copyright (C) 2002, 2003 Mondru AB.
+ * Copyright (C) 2017-2018 by Harald Welte <laforge@gnumonks.org>
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ */
+
+#include <net/if.h>
+
+#include "../lib/in46_addr.h"
+
+#define TUN_NLBUFSIZE   1024
+
+#include "config.h"
+
+/* ipv6 ip type flags for tun_ipv6_local_get() */
+enum {
+	IP_TYPE_IPv4 = 1,
+	IP_TYPE_IPv6_LINK = 2,
+	IP_TYPE_IPv6_NONLINK = 4,
+};
+#define IP_TYPE_IPv6 (IP_TYPE_IPv6_LINK | IP_TYPE_IPv6_NONLINK)
+
+
+#ifndef HAVE_IPHDR
+struct iphdr
+  {
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+    unsigned int ihl:4;
+    unsigned int version:4;
+#elif __BYTE_ORDER == __BIG_ENDIAN
+    unsigned int version:4;
+    unsigned int ihl:4;
+#else
+# error	"Please fix <bits/endian.h>"
+#endif
+    u_int8_t tos;
+    u_int16_t tot_len;
+    u_int16_t id;
+    u_int16_t frag_off;
+    u_int8_t ttl;
+    u_int8_t protocol;
+    u_int16_t check;
+    u_int32_t saddr;
+    u_int32_t daddr;
+    /*The options start here. */
+  };
+#endif /* !HAVE_IPHDR */
+
+extern int netdev_setaddr4(const char *devname, struct in_addr *addr,
+			   struct in_addr *dstaddr, struct in_addr *netmask);
+
+extern int netdev_setaddr6(const char *devname, struct in6_addr *addr, struct in6_addr *dstaddr,
+			   size_t prefixlen);
+
+extern int netdev_addaddr4(const char *devname, struct in_addr *addr,
+			   struct in_addr *dstaddr, struct in_addr *netmask);
+
+extern int netdev_addaddr6(const char *devname, struct in6_addr *addr,
+			   struct in6_addr *dstaddr, int prefixlen);
+
+extern int netdev_addroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
+extern int netdev_delroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
+
+extern int netdev_ip_local_get(const char *devname, struct in46_prefix *prefix_list,
+				size_t prefix_size, int flags);
diff --git a/lib/tun.c b/lib/tun.c
index d2a80be..122d38c 100644
--- a/lib/tun.c
+++ b/lib/tun.c
@@ -42,8 +42,6 @@
 
 #if defined(__linux__)
 #include <linux/if_tun.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
 
 #elif defined (__FreeBSD__)
 #include <net/if_tun.h>
@@ -60,138 +58,6 @@
 #include "tun.h"
 #include "syserr.h"
 
-#if defined(__linux__)
-
-#include <linux/ipv6.h>
-
-static int tun_nlattr(struct nlmsghdr *n, int nsize, int type, void *d, int dlen)
-{
-	int len = RTA_LENGTH(dlen);
-	int alen = NLMSG_ALIGN(n->nlmsg_len);
-	struct rtattr *rta = (struct rtattr *)(((void *)n) + alen);
-	if (alen + len > nsize)
-		return -1;
-	rta->rta_len = len;
-	rta->rta_type = type;
-	memcpy(RTA_DATA(rta), d, dlen);
-	n->nlmsg_len = alen + len;
-	return 0;
-}
-#endif
-
-static int netdev_sifflags(const char *devname, int flags)
-{
-	struct ifreq ifr;
-	int fd;
-
-	memset(&ifr, '\0', sizeof(ifr));
-	ifr.ifr_flags = flags;
-	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
-	ifr.ifr_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
-	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-	if (ioctl(fd, SIOCSIFFLAGS, &ifr)) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno,
-			"ioctl(SIOCSIFFLAGS) failed");
-		close(fd);
-		return -1;
-	}
-	close(fd);
-	return 0;
-}
-
-static int netdev_setaddr4(const char *devname, struct in_addr *addr,
-			   struct in_addr *dstaddr, struct in_addr *netmask)
-{
-	struct ifreq ifr;
-	int fd;
-
-	memset(&ifr, '\0', sizeof(ifr));
-	ifr.ifr_addr.sa_family = AF_INET;
-	ifr.ifr_dstaddr.sa_family = AF_INET;
-
-#if defined(__linux__)
-	ifr.ifr_netmask.sa_family = AF_INET;
-
-#elif defined(__FreeBSD__) || defined (__APPLE__)
-	((struct sockaddr_in *)&ifr.ifr_addr)->sin_len =
-	    sizeof(struct sockaddr_in);
-	((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_len =
-	    sizeof(struct sockaddr_in);
-#endif
-
-	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
-	ifr.ifr_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
-
-	/* Create a channel to the NET kernel. */
-	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	if (addr) {		/* Set the interface address */
-		memcpy(&((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr, addr,
-		       sizeof(*addr));
-		if (ioctl(fd, SIOCSIFADDR, (void *)&ifr) < 0) {
-			if (errno != EEXIST) {
-				SYS_ERR(DTUN, LOGL_ERROR, errno,
-					"ioctl(SIOCSIFADDR) failed");
-			} else {
-				SYS_ERR(DTUN, LOGL_NOTICE, errno,
-					"ioctl(SIOCSIFADDR): Address already exists");
-			}
-			close(fd);
-			return -1;
-		}
-	}
-
-	if (dstaddr) {		/* Set the destination address */
-		memcpy(&((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_addr,
-		       dstaddr, sizeof(*dstaddr));
-		if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t) & ifr) < 0) {
-			SYS_ERR(DTUN, LOGL_ERROR, errno,
-				"ioctl(SIOCSIFDSTADDR) failed");
-			close(fd);
-			return -1;
-		}
-	}
-
-	if (netmask) {		/* Set the netmask */
-#if defined(__linux__)
-		memcpy(&((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr,
-		       netmask, sizeof(*netmask));
-
-#elif defined(__FreeBSD__) || defined (__APPLE__)
-		((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr =
-		    netmask->s_addr;
-#endif
-
-		if (ioctl(fd, SIOCSIFNETMASK, (void *)&ifr) < 0) {
-			SYS_ERR(DTUN, LOGL_ERROR, errno,
-				"ioctl(SIOCSIFNETMASK) failed");
-			close(fd);
-			return -1;
-		}
-	}
-
-	close(fd);
-
-	/* On linux the route to the interface is set automatically
-	   on FreeBSD we have to do this manually */
-
-	/* TODO: How does it work on Solaris? */
-
-	netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
-
-#if defined(__FreeBSD__) || defined (__APPLE__)
-	netdev_addroute(dstaddr, addr, &this->netmask);
-#endif
-
-	return 0;
-}
-
 static int tun_setaddr4(struct tun_t *this, struct in_addr *addr,
 			struct in_addr *dstaddr, struct in_addr *netmask)
 {
@@ -214,87 +80,6 @@ static int tun_setaddr4(struct tun_t *this, struct in_addr *addr,
 	return rc;
 }
 
-static int netdev_setaddr6(const char *devname, struct in6_addr *addr, struct in6_addr *dstaddr,
-			   size_t prefixlen)
-{
-	struct in6_ifreq ifr;
-	int fd;
-
-	memset(&ifr, 0, sizeof(ifr));
-
-#if defined(__linux__)
-	ifr.ifr6_prefixlen = prefixlen;
-	ifr.ifr6_ifindex = if_nametoindex(devname);
-	if (ifr.ifr6_ifindex == 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0, "Error getting ifindex for %s\n", devname);
-		return -1;
-	}
-#elif defined(__FreeBSD__) || defined (__APPLE__)
-	strncpy(ifr.ifr_name, devname, IFNAMSIZ);
-#endif
-
-	/* Create a channel to the NET kernel */
-	if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0, "socket() failed");
-		return -1;
-	}
-
-#if defined(__linux__)
-	if (addr) {
-		memcpy(&ifr.ifr6_addr, addr, sizeof(*addr));
-		if (ioctl(fd, SIOCSIFADDR, (void *) &ifr) < 0) {
-			if (errno != EEXIST) {
-				SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR) failed");
-			} else {
-				SYS_ERR(DTUN, LOGL_NOTICE, 0, "ioctl(SIOCSIFADDR): Address already exists");
-			}
-			close(fd);
-			return -1;
-		}
-	}
-
-#if 0
-	/* FIXME: looks like this is not possible/necessary for IPv6? */
-	if (dstaddr) {
-		memcpy(&ifr.ifr6_addr, dstaddr, sizeof(*dstaddr));
-		if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t *) &ifr) < 0) {
-			SYS_ERR(DTUN, LOGL_ERROR, "ioctl(SIOCSIFDSTADDR) failed");
-			close(fd);
-			return -1;
-		}
-	}
-#endif
-
-#elif defined(__FreeBSD__) || defined (__APPLE__)
-	if (addr)
-		memcpy(&ifr.ifr_ifru.ifru_addr, addr, sizeof(ifr.ifr_ifru.ifru_addr));
-	if (dstaddr)
-		memcpy(&ifr.ifr_ifru.ifru_dstaddr, dstaddr, sizeof(ifr.ifr_ifru.ifru_dstaddr));
-
-	if (ioctl(fd, SIOCSIFADDR_IN6, (struct ifreq *)&ifr) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR_IN6) failed");
-		close(fd);
-		return -1;
-	}
-#endif
-
-	close(fd);
-
-	/* On linux the route to the interface is set automatically
-	   on FreeBSD we have to do this manually */
-
-	/* TODO: How does it work on Solaris? */
-
-	netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
-
-#if 0	/* FIXME */
-//#if defined(__FreeBSD__) || defined (__APPLE__)
-	netdev_addroute6(dstaddr, addr, prefixlen);
-#endif
-
-	return 0;
-}
-
 static int tun_setaddr6(struct tun_t *this, struct in6_addr *addr, struct in6_addr *dstaddr,
 			size_t prefixlen)
 {
@@ -326,166 +111,6 @@ int tun_setaddr(struct tun_t *this, struct in46_addr *addr, struct in46_addr *ds
 	}
 }
 
-static int netdev_addaddr4(const char *devname, struct in_addr *addr,
-			   struct in_addr *dstaddr, struct in_addr *netmask)
-{
-
-#if defined(__linux__)
-	struct {
-		struct nlmsghdr n;
-		struct ifaddrmsg i;
-		char buf[TUN_NLBUFSIZE];
-	} req;
-
-	struct sockaddr_nl local;
-	socklen_t addr_len;
-	int fd;
-	int status;
-
-	struct sockaddr_nl nladdr;
-	struct iovec iov;
-	struct msghdr msg;
-
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
-	req.n.nlmsg_type = RTM_NEWADDR;
-	req.i.ifa_family = AF_INET;
-	req.i.ifa_prefixlen = 32;	/* 32 FOR IPv4 */
-	req.i.ifa_flags = 0;
-	req.i.ifa_scope = RT_SCOPE_HOST;	/* TODO or 0 */
-	req.i.ifa_index = if_nametoindex(devname);
-	if (!req.i.ifa_index) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "Unable to get ifindex for %s", devname);
-		return -1;
-	}
-
-	tun_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(*addr));
-	if (dstaddr)
-		tun_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(*dstaddr));
-
-	if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	memset(&local, 0, sizeof(local));
-	local.nl_family = AF_NETLINK;
-	local.nl_groups = 0;
-
-	if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "bind() failed");
-		close(fd);
-		return -1;
-	}
-
-	addr_len = sizeof(local);
-	if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno,
-			"getsockname() failed");
-		close(fd);
-		return -1;
-	}
-
-	if (addr_len != sizeof(local)) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0,
-			"Wrong address length %d", addr_len);
-		close(fd);
-		return -1;
-	}
-
-	if (local.nl_family != AF_NETLINK) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0,
-			"Wrong address family %d", local.nl_family);
-		close(fd);
-		return -1;
-	}
-
-	iov.iov_base = (void *)&req.n;
-	iov.iov_len = req.n.nlmsg_len;
-
-	msg.msg_name = (void *)&nladdr;
-	msg.msg_namelen = sizeof(nladdr);
-	msg.msg_iov = &iov;
-	msg.msg_iovlen = 1;
-	msg.msg_control = NULL;
-	msg.msg_controllen = 0;
-	msg.msg_flags = 0;
-
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-	nladdr.nl_pid = 0;
-	nladdr.nl_groups = 0;
-
-	req.n.nlmsg_seq = 0;
-	req.n.nlmsg_flags |= NLM_F_ACK;
-
-	status = sendmsg(fd, &msg, 0);
-	if (status != req.n.nlmsg_len) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "sendmsg() failed, returned %d", status);
-		close(fd);
-		return -1;
-	}
-
-	status = netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
-	if (status == -1) {
-		close(fd);
-		return -1;
-	}
-
-
-	close(fd);
-	return 0;
-
-#elif defined (__FreeBSD__) || defined (__APPLE__)
-
-	int fd;
-	struct ifaliasreq areq;
-
-	memset(&areq, 0, sizeof(areq));
-
-	/* Set up interface name */
-	strncpy(areq.ifra_name, devname, IFNAMSIZ);
-	areq.ifra_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
-
-	((struct sockaddr_in *)&areq.ifra_addr)->sin_family = AF_INET;
-	((struct sockaddr_in *)&areq.ifra_addr)->sin_len =
-	    sizeof(areq.ifra_addr);
-	((struct sockaddr_in *)&areq.ifra_addr)->sin_addr.s_addr = addr->s_addr;
-
-	((struct sockaddr_in *)&areq.ifra_mask)->sin_family = AF_INET;
-	((struct sockaddr_in *)&areq.ifra_mask)->sin_len =
-	    sizeof(areq.ifra_mask);
-	((struct sockaddr_in *)&areq.ifra_mask)->sin_addr.s_addr =
-	    netmask->s_addr;
-
-	/* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */
-	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_family = AF_INET;
-	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_len =
-	    sizeof(areq.ifra_broadaddr);
-	((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_addr.s_addr =
-	    dstaddr->s_addr;
-
-	/* Create a channel to the NET kernel. */
-	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno,
-			"ioctl(SIOCAIFADDR) failed");
-		close(fd);
-		return -1;
-	}
-
-	close(fd);
-	return 0;
-
-#endif
-
-}
-
 static int tun_addaddr4(struct tun_t *this, struct in_addr *addr,
 			struct in_addr *dstaddr, struct in_addr *netmask)
 {
@@ -504,161 +129,6 @@ static int tun_addaddr4(struct tun_t *this, struct in_addr *addr,
 	return rc;
 }
 
-static int netdev_addaddr6(const char *devname, struct in6_addr *addr,
-			   struct in6_addr *dstaddr, int prefixlen)
-{
-
-#if defined(__linux__)
-	struct {
-		struct nlmsghdr n;
-		struct ifaddrmsg i;
-		char buf[TUN_NLBUFSIZE];
-	} req;
-
-	struct sockaddr_nl local;
-	socklen_t addr_len;
-	int fd;
-	int status;
-
-	struct sockaddr_nl nladdr;
-	struct iovec iov;
-	struct msghdr msg;
-
-	memset(&req, 0, sizeof(req));
-	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-	req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
-	req.n.nlmsg_type = RTM_NEWADDR;
-	req.i.ifa_family = AF_INET6;
-	req.i.ifa_prefixlen = 64;	/* 64 FOR IPv6 */
-	req.i.ifa_flags = 0;
-	req.i.ifa_scope = RT_SCOPE_HOST;	/* TODO or 0 */
-	req.i.ifa_index = if_nametoindex(devname);
-	if (!req.i.ifa_index) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "Unable to get ifindex for %s", devname);
-		return -1;
-	}
-
-	tun_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(*addr));
-	if (dstaddr)
-		tun_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(*dstaddr));
-
-	if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	memset(&local, 0, sizeof(local));
-	local.nl_family = AF_NETLINK;
-	local.nl_groups = 0;
-
-	if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "bind() failed");
-		close(fd);
-		return -1;
-	}
-
-	addr_len = sizeof(local);
-	if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno,
-			"getsockname() failed");
-		close(fd);
-		return -1;
-	}
-
-	if (addr_len != sizeof(local)) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0,
-			"Wrong address length %d", addr_len);
-		close(fd);
-		return -1;
-	}
-
-	if (local.nl_family != AF_NETLINK) {
-		SYS_ERR(DTUN, LOGL_ERROR, 0,
-			"Wrong address family %d", local.nl_family);
-		close(fd);
-		return -1;
-	}
-
-	iov.iov_base = (void *)&req.n;
-	iov.iov_len = req.n.nlmsg_len;
-
-	msg.msg_name = (void *)&nladdr;
-	msg.msg_namelen = sizeof(nladdr);
-	msg.msg_iov = &iov;
-	msg.msg_iovlen = 1;
-	msg.msg_control = NULL;
-	msg.msg_controllen = 0;
-	msg.msg_flags = 0;
-
-	memset(&nladdr, 0, sizeof(nladdr));
-	nladdr.nl_family = AF_NETLINK;
-	nladdr.nl_pid = 0;
-	nladdr.nl_groups = 0;
-
-	req.n.nlmsg_seq = 0;
-	req.n.nlmsg_flags |= NLM_F_ACK;
-
-	status = sendmsg(fd, &msg, 0);
-	if (status != req.n.nlmsg_len) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "sendmsg() failed, returned %d", status);
-		close(fd);
-		return -1;
-	}
-
-	status = netdev_sifflags(devname, IFF_UP | IFF_RUNNING);
-	if (status == -1) {
-		close(fd);
-		return -1;
-	}
-
-
-	close(fd);
-	return 0;
-
-#elif defined (__FreeBSD__) || defined (__APPLE__)
-
-	int fd;
-	struct ifaliasreq areq;
-
-	memset(&areq, 0, sizeof(areq));
-
-	/* Set up interface name */
-	strncpy(areq.ifra_name, devname, IFNAMSIZ);
-	areq.ifra_name[IFNAMSIZ - 1] = 0;	/* Make sure to terminate */
-
-	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_family = AF_INET6;
-	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_len = sizeof(areq.ifra_addr);
-	((struct sockaddr_in6 *)&areq.ifra_addr)->sin6_addr.s6_addr = addr->s6_addr;
-
-	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_family = AF_INET6;
-	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_len = sizeof(areq.ifra_mask);
-	((struct sockaddr_in6 *)&areq.ifra_mask)->sin6_addr.s6_addr = netmask->s6_addr;
-
-	/* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */
-	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_family = AF_INET6;
-	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_len = sizeof(areq.ifra_broadaddr);
-	((struct sockaddr_in6 *)&areq.ifra_broadaddr)->sin6_addr.s6_addr = dstaddr->s6_addr;
-
-	/* Create a channel to the NET kernel. */
-	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno,
-			"ioctl(SIOCAIFADDR) failed");
-		close(fd);
-		return -1;
-	}
-
-	close(fd);
-	return 0;
-
-#endif
-
-}
-
 static int tun_addaddr6(struct tun_t *this,
 		struct in6_addr *addr,
 		struct in6_addr *dstaddr, int prefixlen)
@@ -691,115 +161,6 @@ int tun_addaddr(struct tun_t *this, struct in46_addr *addr, struct in46_addr *ds
 	}
 }
 
-static int netdev_route(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask, int delete)
-{
-
-#if defined(__linux__)
-
-	struct rtentry r;
-	int fd;
-
-	memset(&r, '\0', sizeof(r));
-	r.rt_flags = RTF_UP | RTF_GATEWAY;	/* RTF_HOST not set */
-
-	/* Create a channel to the NET kernel. */
-	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	r.rt_dst.sa_family = AF_INET;
-	r.rt_gateway.sa_family = AF_INET;
-	r.rt_genmask.sa_family = AF_INET;
-	memcpy(&((struct sockaddr_in *)&r.rt_dst)->sin_addr, dst, sizeof(*dst));
-	memcpy(&((struct sockaddr_in *)&r.rt_gateway)->sin_addr, gateway,
-	       sizeof(*gateway));
-	memcpy(&((struct sockaddr_in *)&r.rt_genmask)->sin_addr, mask,
-	       sizeof(*mask));
-
-	if (delete) {
-		if (ioctl(fd, SIOCDELRT, (void *)&r) < 0) {
-			SYS_ERR(DTUN, LOGL_ERROR, errno,
-				"ioctl(SIOCDELRT) failed");
-			close(fd);
-			return -1;
-		}
-	} else {
-		if (ioctl(fd, SIOCADDRT, (void *)&r) < 0) {
-			SYS_ERR(DTUN, LOGL_ERROR, errno,
-				"ioctl(SIOCADDRT) failed");
-			close(fd);
-			return -1;
-		}
-	}
-	close(fd);
-	return 0;
-
-#elif defined(__FreeBSD__) || defined (__APPLE__)
-
-	struct {
-		struct rt_msghdr rt;
-		struct sockaddr_in dst;
-		struct sockaddr_in gate;
-		struct sockaddr_in mask;
-	} req;
-
-	int fd;
-	struct rt_msghdr *rtm;
-
-	if ((fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed");
-		return -1;
-	}
-
-	memset(&req, 0x00, sizeof(req));
-
-	rtm = &req.rt;
-
-	rtm->rtm_msglen = sizeof(req);
-	rtm->rtm_version = RTM_VERSION;
-	if (delete) {
-		rtm->rtm_type = RTM_DELETE;
-	} else {
-		rtm->rtm_type = RTM_ADD;
-	}
-	rtm->rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;	/* TODO */
-	rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
-	rtm->rtm_pid = getpid();
-	rtm->rtm_seq = 0044;	/* TODO */
-
-	req.dst.sin_family = AF_INET;
-	req.dst.sin_len = sizeof(req.dst);
-	req.mask.sin_family = AF_INET;
-	req.mask.sin_len = sizeof(req.mask);
-	req.gate.sin_family = AF_INET;
-	req.gate.sin_len = sizeof(req.gate);
-
-	req.dst.sin_addr.s_addr = dst->s_addr;
-	req.mask.sin_addr.s_addr = mask->s_addr;
-	req.gate.sin_addr.s_addr = gateway->s_addr;
-
-	if (write(fd, rtm, rtm->rtm_msglen) < 0) {
-		SYS_ERR(DTUN, LOGL_ERROR, errno, "write() failed");
-		close(fd);
-		return -1;
-	}
-	close(fd);
-	return 0;
-#endif
-
-}
-
-int netdev_addroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask)
-{
-	return netdev_route(dst, gateway, mask, 0);
-}
-
-int netdev_delroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask)
-{
-	return netdev_route(dst, gateway, mask, 1);
-}
-
 int tun_new(struct tun_t **tun, const char *dev_name)
 {
 
@@ -966,79 +327,6 @@ int tun_runscript(struct tun_t *tun, char *script)
 	return 0;
 }
 
-#include <ifaddrs.h>
-
-/*! Obtain the local address of a network device
- *  \param[in] devname Target device owning the IP
- *  \param[out] prefix_list List of prefix structures to fill with each IPv4/6 and prefix length found.
- *  \param[in] prefix_size Amount of elements allowed to be fill in the prefix_list array.
- *  \param[in] flags Specify which kind of IP to look for: IP_TYPE_IPv4, IP_TYPE_IPv6_LINK, IP_TYPE_IPv6_NONLINK
- *  \returns The number of ips found following the criteria specified by flags, -1 on error.
- *
- * This function will fill prefix_list with up to prefix_size IPs following the
- * criteria specified by flags parameter. It returns the number of IPs matching
- * the criteria. As a result, the number returned can be bigger than
- * prefix_size. It can be used with prefix_size=0 to get an estimate of the size
- * needed for prefix_list.
- */
-int netdev_ip_local_get(const char *devname, struct in46_prefix *prefix_list, size_t prefix_size, int flags)
-{
-	static const uint8_t ll_prefix[] = { 0xfe,0x80, 0,0, 0,0, 0,0 };
-	struct ifaddrs *ifaddr, *ifa;
-	struct in46_addr netmask;
-	size_t count = 0;
-	bool is_ipv6_ll;
-
-	if (getifaddrs(&ifaddr) == -1) {
-		return -1;
-	}
-
-	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
-		if (ifa->ifa_addr == NULL)
-			continue;
-
-		if (strcmp(ifa->ifa_name, devname))
-			continue;
-
-		if (ifa->ifa_addr->sa_family == AF_INET && (flags & IP_TYPE_IPv4)) {
-			struct sockaddr_in *sin4 = (struct sockaddr_in *) ifa->ifa_addr;
-			struct sockaddr_in *netmask4 = (struct sockaddr_in *) ifa->ifa_netmask;
-
-			if (count < prefix_size) {
-				netmask.len = sizeof(netmask4->sin_addr);
-				netmask.v4 = netmask4->sin_addr;
-				prefix_list[count].addr.len = sizeof(sin4->sin_addr);
-				prefix_list[count].addr.v4 = sin4->sin_addr;
-				prefix_list[count].prefixlen = in46a_netmasklen(&netmask);
-			}
-			count++;
-		}
-
-		if (ifa->ifa_addr->sa_family == AF_INET6 && (flags & IP_TYPE_IPv6)) {
-			struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) ifa->ifa_addr;
-			struct sockaddr_in6 *netmask6 = (struct sockaddr_in6 *) ifa->ifa_netmask;
-
-			is_ipv6_ll = !memcmp(sin6->sin6_addr.s6_addr, ll_prefix, sizeof(ll_prefix));
-			if ((flags & IP_TYPE_IPv6_NONLINK) && is_ipv6_ll)
-				continue;
-			if ((flags & IP_TYPE_IPv6_LINK) && !is_ipv6_ll)
-				continue;
-
-			if (count < prefix_size) {
-				netmask.len = sizeof(netmask6->sin6_addr);
-				netmask.v6 = netmask6->sin6_addr;
-				prefix_list[count].addr.len = sizeof(sin6->sin6_addr);
-				prefix_list[count].addr.v6 = sin6->sin6_addr;
-				prefix_list[count].prefixlen = in46a_netmasklen(&netmask);
-			}
-			count++;
-		}
-	}
-
-	freeifaddrs(ifaddr);
-	return count;
-}
-
 /*! Obtain the local address of the tun device.
  *  \param[in] tun Target device owning the IP
  *  \param[out] prefix_list List of prefix structures to fill with each IPv4/6 and prefix length found.
diff --git a/lib/tun.h b/lib/tun.h
index af9e9f4..c9e8e34 100644
--- a/lib/tun.h
+++ b/lib/tun.h
@@ -1,7 +1,7 @@
 /*
  * TUN interface functions.
  * Copyright (C) 2002, 2003 Mondru AB.
- * Copyright (C) 2017 by Harald Welte <laforge@gnumonks.org>
+ * Copyright (C) 2017-2018 by Harald Welte <laforge@gnumonks.org>
  *
  * The contents of this file may be used under the terms of the GNU
  * General Public License Version 2, provided that the above copyright
@@ -20,43 +20,9 @@
 #define PACKET_MAX      8196	/* Maximum packet size we receive */
 #define TUN_SCRIPTSIZE   256
 #define TUN_ADDRSIZE     128
-#define TUN_NLBUFSIZE   1024
 
 #include "config.h"
-
-/* ipv6 ip type flags for tun_ipv6_local_get() */
-enum {
-	IP_TYPE_IPv4 = 1,
-	IP_TYPE_IPv6_LINK = 2,
-	IP_TYPE_IPv6_NONLINK = 4,
-};
-#define IP_TYPE_IPv6 (IP_TYPE_IPv6_LINK | IP_TYPE_IPv6_NONLINK)
-
-
-#ifndef HAVE_IPHDR
-struct iphdr
-  {
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-    unsigned int ihl:4;
-    unsigned int version:4;
-#elif __BYTE_ORDER == __BIG_ENDIAN
-    unsigned int version:4;
-    unsigned int ihl:4;
-#else
-# error	"Please fix <bits/endian.h>"
-#endif
-    u_int8_t tos;
-    u_int16_t tot_len;
-    u_int16_t id;
-    u_int16_t frag_off;
-    u_int8_t ttl;
-    u_int8_t protocol;
-    u_int16_t check;
-    u_int32_t saddr;
-    u_int32_t daddr;
-    /*The options start here. */
-  };
-#endif /* !HAVE_IPHDR */
+#include "netdev.h"
 
 /* ***********************************************************
  * Information storage for each tun instance
@@ -86,17 +52,12 @@ extern int tun_addaddr(struct tun_t *this, struct in46_addr *addr,
 extern int tun_setaddr(struct tun_t *this, struct in46_addr *our_adr,
 		       struct in46_addr *his_adr, size_t prefixlen);
 
-int netdev_addroute(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
-
 extern int tun_set_cb_ind(struct tun_t *this,
 			  int (*cb_ind) (struct tun_t * tun, void *pack,
 					 unsigned len));
 
 extern int tun_runscript(struct tun_t *tun, char *script);
 
-int netdev_ip_local_get(const char *devname, struct in46_prefix *prefix_list,
-			size_t prefix_size, int flags);
-
 int tun_ip_local_get(const struct tun_t *tun, struct in46_prefix *prefix_list,
 		     size_t prefix_size, int flags);