gentoo-overlay/dev-libs/libdnet/files/libdnet-1.14-ndisc.patch

From 1c324828f4c6c64c9340f169bc059152dba1f998 Mon Sep 17 00:00:00 2001
From: Stas Grabois <finpushack@gmail.com>
Date: Sat, 5 Sep 2020 13:15:32 +0300
Subject: [PATCH] IPv6 support

---
 configure                |  20 ++++
 configure.ac             |   7 ++
 include/dnet.h           |   1 +
 include/dnet/Makefile.am |   2 +-
 include/dnet/Makefile.in |   2 +-
 include/dnet/ip6.h       |   3 +
 include/dnet/ndisc.h     |  35 +++++++
 include/dnet/route.h     |   3 +
 src/Makefile.in          |   2 +-
 src/intf.c               | 101 +++++++++++++-------
 src/ip6.c                |  56 +++++++++++
 src/ndisc-linux.c        | 197 +++++++++++++++++++++++++++++++++++++++
 src/ndisc-none.c         |  55 +++++++++++
 src/route-linux.c        |  95 ++++++++++++++++++-
 14 files changed, 541 insertions(+), 38 deletions(-)
 create mode 100644 include/dnet/ndisc.h
 create mode 100644 src/ndisc-linux.c
 create mode 100644 src/ndisc-none.c

--- a/configure
+++ b/configure
@@ -22025,6 +22025,26 @@
 
 fi
 
+if test "$ac_cv_dnet_linux_procfs" = yes ; then
+	case $LIBOBJS in
+    "ndisc-linux.$ac_objext"   | \
+  *" ndisc-linux.$ac_objext"   | \
+    "ndisc-linux.$ac_objext "* | \
+  *" ndisc-linux.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS ndisc-linux.$ac_objext" ;;
+esac
+
+else
+	case $LIBOBJS in
+    "ndisc-none.$ac_objext"   | \
+  *" ndisc-none.$ac_objext"   | \
+    "ndisc-none.$ac_objext "* | \
+  *" ndisc-none.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS ndisc-none.$ac_objext" ;;
+esac
+
+fi
+
 if test "$ac_cv_header_linux_if_tun_h" = yes ; then
 	case $LIBOBJS in
     "tun-linux.$ac_objext"   | \
--- a/configure.ac
+++ b/configure.ac
@@ -303,6 +303,13 @@
 	AC_LIBOBJ([route-none])
 fi
 
+dnl Check for ndisc interface.
+if test "$ac_cv_dnet_linux_procfs" = yes ; then
+    AC_LIBOBJ([ndisc-linux])
+else
+    AC_LIBOBJ([ndisc-none])
+fi
+
 dnl Check for tun interface.
 if test "$ac_cv_header_linux_if_tun_h" = yes ; then
 	AC_LIBOBJ([tun-linux])
--- a/include/dnet.h
+++ b/include/dnet.h
@@ -16,6 +16,7 @@
 #include <dnet/ip6.h>
 #include <dnet/addr.h>
 #include <dnet/arp.h>
+#include <dnet/ndisc.h>
 #include <dnet/icmp.h>
 #include <dnet/tcp.h>
 #include <dnet/udp.h>
--- a/include/dnet/Makefile.am
+++ b/include/dnet/Makefile.am
@@ -5,4 +5,4 @@
 dnetincludedir = $(includedir)/dnet
 
 dnetinclude_HEADERS = addr.h arp.h blob.h eth.h fw.h icmp.h intf.h ip.h \
-	ip6.h os.h rand.h route.h tcp.h tun.h udp.h sctp.h
+	ip6.h os.h rand.h route.h tcp.h tun.h udp.h sctp.h ndisc.h
--- a/include/dnet/Makefile.in
+++ b/include/dnet/Makefile.in
@@ -106,7 +106,7 @@
 dnetincludedir = $(includedir)/dnet
 
 dnetinclude_HEADERS = addr.h arp.h blob.h eth.h fw.h icmp.h intf.h ip.h \
-	ip6.h os.h rand.h route.h tcp.h tun.h udp.h sctp.h
+	ip6.h os.h rand.h route.h tcp.h tun.h udp.h sctp.h ndisc.h
 
 subdir = include/dnet
 mkinstalldirs = $(SHELL) $(top_srcdir)/config/mkinstalldirs
--- a/include/dnet/ip6.h
+++ b/include/dnet/ip6.h
@@ -179,6 +179,9 @@
 char	*ip6_ntoa(const ip6_addr_t *ip6);
 #define	 ip6_aton ip6_pton
 
+ssize_t	 ip6_add_option(void *buf, size_t len,
+           int proto, const void *optbuf, size_t optlen);
+
 void	 ip6_checksum(void *buf, size_t len);
 __END_DECLS
 
new file mode 100644
--- a//dev/null
+++ b/include/dnet/ndisc.h
@@ -0,0 +1,35 @@
+/*
+ * ndisc.c
+ *
+ * Kernel arp/ndisc table operations.
+ *
+ * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
+ *
+ */
+
+#ifndef DNET_NDISC_H
+#define DNET_NDISC_H
+
+/*
+ * NDISC cache entry
+ */
+struct ndisc_entry {
+    int    intf_index;
+	struct addr	ndisc_pa;			/* protocol address */
+	struct addr	ndisc_ha;			/* hardware address */
+};
+
+typedef struct ndisc_handle ndisc_t;
+
+typedef int (*ndisc_handler)(const struct ndisc_entry *entry, void *arg);
+
+__BEGIN_DECLS
+ndisc_t	*ndisc_open(void);
+int	 ndisc_add(ndisc_t *n, const struct ndisc_entry *entry);
+int	 ndisc_delete(ndisc_t *n, const struct ndisc_entry *entry);
+int	 ndisc_get(ndisc_t *n, struct ndisc_entry *entry);
+int	 ndisc_loop(ndisc_t *n, ndisc_handler callback, void *arg);
+ndisc_t	*ndisc_close(ndisc_t *r);
+__END_DECLS
+
+#endif /* DNET_NDISC_H */
--- a/include/dnet/route.h
+++ b/include/dnet/route.h
@@ -26,7 +26,10 @@
 __BEGIN_DECLS
 route_t	*route_open(void);
 int	 route_add(route_t *r, const struct route_entry *entry);
+int	 route_add_dev(route_t *r, const struct route_entry *entry, const char* dev);
+int	 route6_add(route_t *r, const struct route_entry *entry, int intf_index);
 int	 route_delete(route_t *r, const struct route_entry *entry);
+int	 route6_delete(route_t *r, const struct route_entry *entry, int intf_index);
 int	 route_get(route_t *r, struct route_entry *entry);
 int	 route_loop(route_t *r, route_handler callback, void *arg);
 route_t	*route_close(route_t *r);
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -144,7 +144,7 @@
 	intf-win32.c intf.c ip-cooked.c ip-win32.c ip.c memcmp.c \
 	route-bsd.c route-hpux.c route-linux.c route-none.c \
 	route-win32.c strlcat.c strlcpy.c strsep.c tun-bsd.c \
-	tun-linux.c tun-none.c tun-solaris.c
+	tun-linux.c tun-none.c tun-solaris.c ndisc-linux.c ndisc-none.c
 SOURCES = $(libdnet_la_SOURCES)
 
 all: all-am
--- a/src/intf.c
+++ b/src/intf.c
@@ -20,6 +20,9 @@
 # define IP_MULTICAST
 #endif
 #include <net/if.h>
+#ifdef HAVE_NET_IF_DL_H
+# include <net/if_dl.h>
+#endif
 #ifdef HAVE_NET_IF_VAR_H
 # include <net/if_var.h>
 #endif
@@ -79,6 +82,21 @@
 	u_char		ifcbuf[4192];
 };
 
+/* TODO: move to .h */
+union sockunion {
+#ifdef HAVE_NET_IF_DL_H
+       struct sockaddr_dl      sdl;
+#endif
+       struct sockaddr_in      sin;
+#ifdef HAVE_SOCKADDR_IN6
+       struct sockaddr_in6     sin6;
+#endif
+       struct sockaddr         sa;
+#ifdef AF_RAW
+       struct sockaddr_raw     sr;
+#endif
+};
+
 static int
 intf_flags_to_iff(u_short flags, int iff)
 {
@@ -129,14 +147,10 @@
 
 		setsockopt(intf->fd, SOL_SOCKET, SO_BROADCAST,
 						(const char *) &one, sizeof(one));
-#ifdef SIOCGIFNETMASK_IN6
 		if ((intf->fd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
-#  ifdef EPROTONOSUPPORT
 			if (errno != EPROTONOSUPPORT)
-#  endif
 				return (intf_close(intf));
 		}
-#endif
 	}
 	return (intf);
 }
@@ -586,34 +600,50 @@
 	return (_intf_get_aliases(intf, entry));
 }
 
+static int
+get_max_bits(const struct addr *a)
+{
+	if (a->addr_type == ADDR_TYPE_IP) {
+		return IP_ADDR_BITS;
+	} else if (a->addr_type == ADDR_TYPE_IP6) {
+		return IP6_ADDR_BITS;
+	} else {
+		return 0;
+	}
+}
+
 static int
 _match_intf_src(const struct intf_entry *entry, void *arg)
 {
-	int matched = 0;
-	int cnt;
 	struct intf_entry *save = (struct intf_entry *)arg;
-	
-	if (entry->intf_addr.addr_type == ADDR_TYPE_IP &&
-		entry->intf_addr.addr_ip == save->intf_addr.addr_ip) {
-		matched = 1; 
-	} else {
-		for (cnt = 0; !matched && cnt < (int) entry->intf_alias_num; cnt++) {
-			if (entry->intf_alias_addrs[cnt].addr_type != ADDR_TYPE_IP)
-				continue;
-			if (entry->intf_alias_addrs[cnt].addr_ip == save->intf_addr.addr_ip)
-				matched = 1;
-		}
+	int len = save->intf_len < entry->intf_len ? save->intf_len : entry->intf_len;
+	int i;
+
+	struct addr a, saved_addr;
+
+	saved_addr = save->intf_addr;
+	saved_addr.addr_bits = get_max_bits(&saved_addr);
+
+	a = entry->intf_addr;
+	a.addr_bits = get_max_bits(&a);
+
+	if (addr_cmp(&a, &saved_addr) == 0) {
+		memcpy(save, entry, len);
+		return 1;
 	}
 
-	if (matched) {
-		/* XXX - truncated result if entry is too small. */
-		if (save->intf_len < entry->intf_len)
-			memcpy(save, entry, save->intf_len);
-		else
-			memcpy(save, entry, entry->intf_len);
-		return (1);
+	for (i = 0; i < (int)entry->intf_alias_num; i++) {
+		a = entry->intf_alias_addrs[i];
+		a.addr_bits = get_max_bits(&a);
+
+		if (addr_cmp(&a, &saved_addr) == 0) {
+			memcpy(save, entry, len);
+			save->intf_addr = entry->intf_alias_addrs[i];
+			return 1;
+		}
 	}
-	return (0);
+
+	return 0;
 }
 
 int
@@ -631,24 +661,27 @@
 int
 intf_get_dst(intf_t *intf, struct intf_entry *entry, struct addr *dst)
 {
-	struct sockaddr_in sin;
+	union sockunion sun;
 	socklen_t n;
 
-	if (dst->addr_type != ADDR_TYPE_IP) {
+	int fd;
+
+	if (dst->addr_type != ADDR_TYPE_IP && dst->addr_type != ADDR_TYPE_IP6) {
 		errno = EINVAL;
 		return (-1);
 	}
-	addr_ntos(dst, (struct sockaddr *)&sin);
-	sin.sin_port = htons(666);
-	
-	if (connect(intf->fd, (struct sockaddr *)&sin, sizeof(sin)) < 0)
+	addr_ntos(dst, (struct sockaddr *)&sun);
+	sun.sin.sin_port = htons(666);
+
+	fd = dst->addr_type == ADDR_TYPE_IP6 ? intf->fd6 : intf->fd;
+	if (connect(fd, (struct sockaddr *)&sun, sizeof(sun)) < 0)
 		return (-1);
 	
-	n = sizeof(sin);
-	if (getsockname(intf->fd, (struct sockaddr *)&sin, &n) < 0)
+	n = sizeof(sun);
+	if (getsockname(fd, (struct sockaddr *)&sun, &n) < 0)
 		return (-1);
 	
-	addr_ston((struct sockaddr *)&sin, &entry->intf_addr);
+	addr_ston((struct sockaddr *)&sun, &entry->intf_addr);
 	
 	if (intf_loop(intf, _match_intf_src, entry) != 1)
 		return (-1);
--- a/src/ip6.c
+++ b/src/ip6.c
@@ -9,6 +9,8 @@
 #include "config.h"
 
 #include "dnet.h"
+#include <string.h>
+#include <errno.h>
 
 #define IP6_IS_EXT(n)	\
 	((n) == IP_PROTO_HOPOPTS || (n) == IP_PROTO_DSTOPTS || \
@@ -70,3 +72,57 @@
 		}
 	}
 }
+
+ssize_t
+ip6_add_option(void *buf, size_t len, int proto,
+    const void *optbuf, size_t optlen)
+{
+	struct ip6_hdr *ip6;
+	struct tcp_hdr *tcp = NULL;
+	u_char *p;
+	int hl, datalen, padlen;
+
+	if (proto != IP_PROTO_TCP) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	ip6 = (struct ip6_hdr *)buf;
+	p = (u_char *)buf + IP6_HDR_LEN;
+
+	tcp = (struct tcp_hdr *)p;
+	hl = tcp->th_off << 2;
+	p = (u_char *)tcp + hl;
+
+	datalen = ntohs(ip6->ip6_plen) + IP6_HDR_LEN - (p - (u_char *)buf);
+
+	/* Compute padding to next word boundary. */
+	if ((padlen = 4 - (optlen % 4)) == 4)
+		padlen = 0;
+
+	/* XXX - IP_HDR_LEN_MAX == TCP_HDR_LEN_MAX */
+	if (hl + optlen + padlen > IP_HDR_LEN_MAX ||
+	    ntohs(ip6->ip6_plen) + IP6_HDR_LEN + optlen + padlen > len) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	/* Shift any existing data. */
+	if (datalen) {
+		memmove(p + optlen + padlen, p, datalen);
+	}
+	/* XXX - IP_OPT_NOP == TCP_OPT_NOP */
+	if (padlen) {
+		memset(p, IP_OPT_NOP, padlen);
+		p += padlen;
+	}
+	memmove(p, optbuf, optlen);
+	p += optlen;
+	optlen += padlen;
+
+	tcp->th_off = (p - (u_char *)tcp) >> 2;
+
+	ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) + optlen);
+
+	return (optlen);
+}
new file mode 100644
--- a//dev/null
+++ b/src/ndisc-linux.c
@@ -0,0 +1,197 @@
+/*
+ * ndisc-linux.c
+ *
+ * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
+ *
+ */
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+
+#include <asm/types.h>
+#include <netinet/in.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+#include <net/route.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "dnet.h"
+
+struct ndisc_handle 
+{
+	int nlfd;
+	int seq;
+};
+
+ndisc_t *
+ndisc_open(void)
+{
+	struct sockaddr_nl snl;
+	ndisc_t *n;
+
+	if ((n = calloc(1, sizeof(*n))) != NULL) {
+		n->nlfd = -1;
+
+		if ((n->nlfd = socket(AF_NETLINK, SOCK_RAW,
+			 NETLINK_ROUTE)) < 0)
+			return (ndisc_close(n));
+		
+		memset(&snl, 0, sizeof(snl));
+		snl.nl_family = AF_NETLINK;
+		
+		if (bind(n->nlfd, (struct sockaddr *)&snl, sizeof(snl)) < 0)
+			return (ndisc_close(n));
+	}
+	return (n);
+}
+
+static int
+netlink_addattr(struct nlmsghdr *n, int type, const void *data, int data_len)
+{
+	int len = RTA_LENGTH(data_len);
+	struct rtattr *rta;
+
+	rta = (struct rtattr *)((uint8_t*)n + NLMSG_ALIGN(n->nlmsg_len));
+	rta->rta_type = type;
+	rta->rta_len = len;
+	memcpy(RTA_DATA(rta), data, data_len);
+	n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len);
+	return 0;
+}
+
+int
+ndisc_modify(ndisc_t *n, const struct ndisc_entry *entry, int type, int flags)
+{
+	struct nlmsghdr *nmsg;
+	struct ndmsg *ndm;
+	struct rtattr *rta;
+	struct sockaddr_nl snl;
+	struct iovec iov;
+	struct msghdr msg;
+	u_char buf[512];
+	int i, af, alen;
+
+	switch (entry->ndisc_pa.addr_type) {
+	case ADDR_TYPE_IP:
+		af = AF_INET;
+		alen = IP_ADDR_LEN;
+		break;
+	case ADDR_TYPE_IP6:
+		af = AF_INET6;
+		alen = IP6_ADDR_LEN;
+		break;
+	default:
+		errno = EINVAL;
+		return (-1);
+	}
+	memset(buf, 0, sizeof(buf));
+
+	nmsg = (struct nlmsghdr *)buf;
+	nmsg->nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
+	nmsg->nlmsg_flags = NLM_F_REQUEST | flags;
+	nmsg->nlmsg_type = type;
+	nmsg->nlmsg_seq = ++n->seq;
+
+	nmsg->nlmsg_flags |= NLM_F_ACK;
+
+	ndm = (struct ndmsg *)(nmsg + 1);
+	ndm->ndm_family = af;
+	ndm->ndm_state = NUD_PERMANENT; 
+	ndm->ndm_ifindex = entry->intf_index;
+	
+	netlink_addattr(nmsg, NDA_DST, &entry->ndisc_pa.addr_data8[0],
+			alen);
+
+	if (type == RTM_NEWNEIGH) {
+		netlink_addattr(nmsg, NDA_LLADDR, 
+				&entry->ndisc_ha.addr_data8[0], ETH_ADDR_LEN);
+	}
+
+	memset(&snl, 0, sizeof(snl));
+	snl.nl_family = AF_NETLINK;
+
+	iov.iov_base = nmsg;
+	iov.iov_len = nmsg->nlmsg_len;
+	
+	memset(&msg, 0, sizeof(msg));
+	msg.msg_name = &snl;
+	msg.msg_namelen = sizeof(snl);
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	
+	if (sendmsg(n->nlfd, &msg, 0) < 0)
+		return (-1);
+
+	iov.iov_base = buf;
+	iov.iov_len = sizeof(buf);
+	
+	if ((i = recvmsg(n->nlfd, &msg, 0)) <= 0)
+		return (-1);
+
+	if (nmsg->nlmsg_len < (int)sizeof(*nmsg) || nmsg->nlmsg_len > i ||
+	    nmsg->nlmsg_seq != n->seq) {
+		errno = EINVAL;
+		return (-1);
+	}
+	if (nmsg->nlmsg_type == NLMSG_ERROR) {
+		struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(nmsg);
+		errno = -err->error;
+		if (errno == 0) {
+			return 0;
+		}
+
+		return (-1);
+	}
+
+	return (-1);
+}
+
+int
+ndisc_add(ndisc_t *n, const struct ndisc_entry *entry)
+{
+	return ndisc_modify(n, entry, RTM_NEWNEIGH, NLM_F_CREATE | NLM_F_EXCL);
+}
+
+int
+ndisc_delete(ndisc_t *n, const struct ndisc_entry *entry)
+{
+	return ndisc_modify(n, entry, RTM_DELNEIGH, 0);
+}
+
+int
+ndisc_get(ndisc_t *n, struct ndisc_entry *entry)
+{
+	/* TBD */
+	errno = ENOSYS;
+	return (-1);
+}
+
+int
+nsidc_loop(ndisc_t *n, ndisc_handler callback, void *arg)
+{
+	/* TBD */
+	errno = ENOSYS;
+	return (-1);
+}
+
+ndisc_t *
+ndisc_close(ndisc_t *n)
+{
+	if (n != NULL) {
+		if (n->nlfd >= 0)
+			close(n->nlfd);
+		free(n);
+	}
+	return (NULL);
+}
new file mode 100644
--- a//dev/null
+++ b/src/ndisc-none.c
@@ -0,0 +1,55 @@
+/*
+ * ndisc-linux.c
+ *
+ * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
+ *
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "dnet.h"
+
+ndisc_t *
+ndisc_open(void)
+{
+	errno = ENOSYS;
+	return (NULL);
+}
+
+int
+ndisc_add(ndisc_t *n, const struct ndisc_entry *entry)
+{
+	errno = ENOSYS;
+	return (-1);
+}
+
+int
+ndisc_delete(ndisc_t *n, const struct ndisc_entry *entry)
+{
+	errno = ENOSYS;
+	return (-1);
+}
+
+int
+ndisc_get(ndisc_t *n, struct ndisc_entry *entry)
+{
+	errno = ENOSYS;
+	return (-1);
+}
+
+int
+nsidc_loop(ndisc_t *n, ndisc_handler callback, void *arg)
+{
+	errno = ENOSYS;
+	return (-1);
+}
+
+ndisc_t *
+ndisc_close(ndisc_t *n)
+{
+	return (NULL);
+}
--- a/src/route-linux.c
+++ b/src/route-linux.c
@@ -39,6 +39,7 @@
 
 struct route_handle {
 	int	 fd;
+	int	 fd6;
 	int	 nlfd;
 };
 
@@ -49,10 +50,13 @@
 	route_t *r;
 
 	if ((r = calloc(1, sizeof(*r))) != NULL) {
-		r->fd = r->nlfd = -1;
+		r->fd = r->fd6 = r->nlfd = -1;
 		
 		if ((r->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 			return (route_close(r));
+
+		if ((r->fd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
+			return (route_close(r));
 		
 		if ((r->nlfd = socket(AF_NETLINK, SOCK_RAW,
 			 NETLINK_ROUTE)) < 0)
@@ -90,6 +94,67 @@
 	return (ioctl(r->fd, SIOCADDRT, &rt));
 }
 
+int
+route_add_dev(route_t *r, const struct route_entry *entry, const char* dev)
+{
+	struct rtentry rt;
+	struct addr dst;
+
+	memset(&rt, 0, sizeof(rt));
+	rt.rt_flags = RTF_UP;
+	rt.rt_dev = (char*)dev;
+
+	if (ADDR_ISHOST(&entry->route_dst)) {
+		rt.rt_flags |= RTF_HOST;
+		memcpy(&dst, &entry->route_dst, sizeof(dst));
+	} else
+		addr_net(&entry->route_dst, &dst);
+
+	if (entry->route_gw.addr_ip != 0) {
+		rt.rt_flags |= RTF_GATEWAY;
+	}
+
+	if (addr_ntos(&dst, &rt.rt_dst) < 0 ||
+	    addr_ntos(&entry->route_gw, &rt.rt_gateway) < 0 ||
+	    addr_btos(entry->route_dst.addr_bits, &rt.rt_genmask) < 0)
+		return (-1);
+
+	int ret = (ioctl(r->fd, SIOCADDRT, &rt));
+	return ret;
+}
+
+int
+route6_add(route_t *r, const struct route_entry *entry, int intf_index)
+{
+	struct in6_rtmsg rt;
+	struct addr dst;
+
+	memset(&rt, 0, sizeof(rt));
+	rt.rtmsg_flags = RTF_UP;
+
+	if (ADDR_ISHOST(&entry->route_dst)) {
+		rt.rtmsg_flags |= RTF_HOST;
+		memcpy(&dst, &entry->route_dst, sizeof(dst));
+	} else {
+		addr_net(&entry->route_dst, &dst);
+	}
+
+	rt.rtmsg_dst_len = entry->route_dst.addr_bits;
+	rt.rtmsg_ifindex = intf_index;
+	rt.rtmsg_metric = 1;
+
+	memcpy(&rt.rtmsg_dst, &dst.addr_ip6, sizeof(rt.rtmsg_dst));
+
+	if (!IN6_IS_ADDR_UNSPECIFIED(&entry->route_gw.addr_ip6)) {
+		rt.rtmsg_flags |= RTF_GATEWAY;
+		memcpy(&rt.rtmsg_gateway, &entry->route_gw.addr_ip6,
+				sizeof(rt.rtmsg_gateway));
+	}
+
+	int ret = (ioctl(r->fd6, SIOCADDRT, &rt));
+	return ret;
+}
+
 int
 route_delete(route_t *r, const struct route_entry *entry)
 {
@@ -112,6 +177,32 @@
 	return (ioctl(r->fd, SIOCDELRT, &rt));
 }
 
+int
+route6_delete(route_t *r, const struct route_entry *entry, int intf_index)
+{
+	struct in6_rtmsg rt;
+	struct addr dst;
+
+	memset(&rt, 0, sizeof(rt));
+	rt.rtmsg_flags = RTF_UP;
+
+	if (ADDR_ISHOST(&entry->route_dst)) {
+		rt.rtmsg_flags |= RTF_HOST;
+		memcpy(&dst, &entry->route_dst, sizeof(dst));
+	} else
+		addr_net(&entry->route_dst, &dst);
+
+	rt.rtmsg_dst_len = entry->route_dst.addr_bits;
+	rt.rtmsg_ifindex = intf_index;
+	rt.rtmsg_metric = 1;
+
+	memcpy(&rt.rtmsg_dst, &dst, sizeof(rt.rtmsg_dst));
+	memcpy(&rt.rtmsg_gateway, &entry->route_gw, sizeof(rt.rtmsg_gateway));
+
+	int ret = (ioctl(r->fd6, SIOCDELRT, &rt));
+	return ret;
+}
+
 int
 route_get(route_t *r, struct route_entry *entry)
 {
@@ -278,6 +369,8 @@
 	if (r != NULL) {
 		if (r->fd >= 0)
 			close(r->fd);
+		if (r->fd6 >= 0)
+			close(r->fd6);
 		if (r->nlfd >= 0)
 			close(r->nlfd);
 		free(r);