dev-libs/libdnet: Add ndisc patch

Package-Manager: Portage-3.0.8, Repoman-3.0.1
Bug: https://bugs.gentoo.org/744484
Signed-off-by: Jeroen Roovers <jer@gentoo.org>

2 files changed, 874 insertions, 0 deletions

diff --git a/dev-libs/libdnet/files/libdnet-1.14-ndisc.patch b/dev-libs/libdnet/files/libdnet-1.14-ndisc.patch
new file mode 100644
index 000000000000..439ffb7cb927
--- /dev/null
+++ b/dev-libs/libdnet/files/libdnet-1.14-ndisc.patch
@@ -0,0 +1,796 @@
+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);
diff --git a/dev-libs/libdnet/libdnet-1.14-r1.ebuild b/dev-libs/libdnet/libdnet-1.14-r1.ebuild
new file mode 100644
index 000000000000..a709c3f636c7
--- /dev/null
+++ b/dev-libs/libdnet/libdnet-1.14-r1.ebuild
@@ -0,0 +1,78 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+AT_M4DIR="config"
+PYTHON_COMPAT=( python3_{6,7,8} )
+DISTUTILS_OPTIONAL=1
+inherit autotools distutils-r1
+
+DESCRIPTION="simplified, portable interface to several low-level networking routines"
+HOMEPAGE="https://github.com/ofalk/libdnet"
+SRC_URI="https://github.com/ofalk/${PN}/archive/${P}.tar.gz"
+LICENSE="LGPL-2"
+
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86"
+IUSE="python static-libs test"
+
+DEPEND="
+	python? ( ${PYTHON_DEPS} )
+"
+RDEPEND="
+	${DEPEND}
+"
+RESTRICT="test"
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+DOCS=( README.md THANKS TODO )
+S=${WORKDIR}/${PN}-${P}
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.14-ndisc.patch
+	"${FILESDIR}"/${PN}-1.14-strlcpy.patch
+)
+
+src_prepare() {
+	default
+
+	sed -i \
+		-e 's/libcheck.a/libcheck.so/g' \
+		-e 's|AM_CONFIG_HEADER|AC_CONFIG_HEADERS|g' \
+		configure.ac || die
+	sed -i \
+		-e 's|-L$libdir ||g' \
+		dnet-config.in || die
+	sed -i \
+		-e '/^SUBDIRS/s|python||g' \
+		Makefile.am || die
+
+	eautoreconf
+
+	if use python; then
+		cd python
+		distutils-r1_src_prepare
+	fi
+}
+
+src_configure() {
+	econf \
+		$(use_with python) \
+		$(use_enable static-libs static)
+}
+
+src_compile() {
+	default
+	if use python; then
+		cd python
+		distutils-r1_src_compile
+	fi
+}
+
+src_install() {
+	default
+	if use python; then
+		cd python
+		unset DOCS
+		distutils-r1_src_install
+	fi
+	find "${D}" -name '*.la' -delete || die
+}