/*
* Copyright (c) 1988, 1991, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (C) 2017-2021 THL A29 Limited, a Tencent company.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copied part from FreeBSD rtsock.c.
*
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/domain.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/priv.h>
#include <sys/rmlock.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_llatbl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/route/route_var.h>
#include <net/route/route_ctl.h>
#include <net/route/nhgrp_var.h>
#include <netinet/if_ether.h>
#ifdef INET6
#include <netinet6/scope6_var.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_var.h>
#endif
#include "ff_api.h"
#include "ff_host_interface.h"
#ifndef _SOCKADDR_UNION_DEFINED
#define _SOCKADDR_UNION_DEFINED
/*
* The union of all possible address formats we handle.
*/
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
#endif /* _SOCKADDR_UNION_DEFINED */
static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
struct walkarg {
int w_tmemsize;
int w_op, w_arg;
caddr_t w_tmem;
struct sysctl_req *w_req;
};
/*
* Extract the addresses of the passed sockaddrs.
* Do a little sanity checking so as to avoid bad memory references.
* This data is derived straight from userland.
*/
static int
rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
{
struct sockaddr *sa;
int i;
for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
if ((rtinfo->rti_addrs & (1 << i)) == 0)
continue;
sa = (struct sockaddr *)cp;
/*
* It won't fit.
*/
if (cp + sa->sa_len > cplim)
return (EINVAL);
/*
* there are no more.. quit now
* If there are more bits, they are in error.
* I've seen this. route(1) can evidently generate these.
* This causes kernel to core dump.
* for compatibility, If we see this, point to a safe address.
*/
if (sa->sa_len == 0) {
rtinfo->rti_info[i] = &sa_zero;
return (0); /* should be EINVAL but for compat */
}
/* accept it */
#ifdef INET6
if (sa->sa_family == AF_INET6)
sa6_embedscope((struct sockaddr_in6 *)sa,
V_ip6_use_defzone);
#endif
rtinfo->rti_info[i] = sa;
cp += SA_SIZE(sa);
}
return (0);
}
static inline void
fill_sockaddr_inet(struct sockaddr_in *sin, struct in_addr addr)
{
const struct sockaddr_in nsin = {
.sin_family = AF_INET,
.sin_len = sizeof(struct sockaddr_in),
.sin_addr = addr,
};
*sin = nsin;
}
#ifdef INET6
static inline void
fill_sockaddr_inet6(struct sockaddr_in6 *sin6, const struct in6_addr *addr6,
uint32_t scopeid)
{
const struct sockaddr_in6 nsin6 = {
.sin6_family = AF_INET6,
.sin6_len = sizeof(struct sockaddr_in6),
.sin6_addr = *addr6,
.sin6_scope_id = scopeid,
};
*sin6 = nsin6;
}
#endif
/*
* Checks if gateway is suitable for lltable operations.
* Lltable code requires AF_LINK gateway with ifindex
* and mac address specified.
* Returns 0 on success.
*/
static int
cleanup_xaddrs_lladdr(struct rt_addrinfo *info)
{
struct sockaddr_dl *sdl = (struct sockaddr_dl *)info->rti_info[RTAX_GATEWAY];
if (sdl->sdl_family != AF_LINK)
return (EINVAL);
if (sdl->sdl_index == 0)
return (EINVAL);
if (offsetof(struct sockaddr_dl, sdl_data) + sdl->sdl_nlen + sdl->sdl_alen > sdl->sdl_len)
return (EINVAL);
return (0);
}
static int
cleanup_xaddrs_gateway(struct rt_addrinfo *info)
{
struct sockaddr *gw = info->rti_info[RTAX_GATEWAY];
if (info->rti_flags & RTF_LLDATA)
return (cleanup_xaddrs_lladdr(info));
switch (gw->sa_family) {
case AF_INET:
{
struct sockaddr_in *gw_sin = (struct sockaddr_in *)gw;
if (gw_sin->sin_len < sizeof(struct sockaddr_in)) {
printf("gw sin_len too small\n");
return (EINVAL);
}
fill_sockaddr_inet(gw_sin, gw_sin->sin_addr);
}
break;
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *gw_sin6 = (struct sockaddr_in6 *)gw;
if (gw_sin6->sin6_len < sizeof(struct sockaddr_in6)) {
printf("gw sin6_len too small\n");
return (EINVAL);
}
fill_sockaddr_inet6(gw_sin6, &gw_sin6->sin6_addr, 0);
break;
}
#endif
case AF_LINK:
{
struct sockaddr_dl_short *gw_sdl;
gw_sdl = (struct sockaddr_dl_short *)gw;
if (gw_sdl->sdl_len < sizeof(struct sockaddr_dl_short)) {
printf("gw sdl_len too small\n");
return (EINVAL);
}
const struct sockaddr_dl_short sdl = {
.sdl_family = AF_LINK,
.sdl_len = sizeof(struct sockaddr_dl_short),
.sdl_index = gw_sdl->sdl_index,
};
*gw_sdl = sdl;
break;
}
}
return (0);
}
static void
remove_netmask(struct rt_addrinfo *info)
{
info->rti_info[RTAX_NETMASK] = NULL;
info->rti_flags |= RTF_HOST;
info->rti_addrs &= ~RTA_NETMASK;
}
static int
cleanup_xaddrs_inet(struct rt_addrinfo *info)
{
struct sockaddr_in *dst_sa, *mask_sa;
/* Check & fixup dst/netmask combination first */
dst_sa = (struct sockaddr_in *)info->rti_info[RTAX_DST];
mask_sa = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK];
struct in_addr mask = {
.s_addr = mask_sa ? mask_sa->sin_addr.s_addr : INADDR_BROADCAST,
};
struct in_addr dst = {
.s_addr = htonl(ntohl(dst_sa->sin_addr.s_addr) & ntohl(mask.s_addr))
};
if (dst_sa->sin_len < sizeof(struct sockaddr_in)) {
printf("dst sin_len too small\n");
return (EINVAL);
}
if (mask_sa && mask_sa->sin_len < sizeof(struct sockaddr_in)) {
printf("mask sin_len too small\n");
return (EINVAL);
}
fill_sockaddr_inet(dst_sa, dst);
if (mask.s_addr != INADDR_BROADCAST)
fill_sockaddr_inet(mask_sa, mask);
else
remove_netmask(info);
/* Check gateway */
if (info->rti_info[RTAX_GATEWAY] != NULL)
return (cleanup_xaddrs_gateway(info));
return (0);
}
#ifdef INET6
static int
cleanup_xaddrs_inet6(struct rt_addrinfo *info)
{
struct sockaddr_in6 *dst_sa, *mask_sa;
struct in6_addr mask;
/* Check & fixup dst/netmask combination first */
dst_sa = (struct sockaddr_in6 *)info->rti_info[RTAX_DST];
mask_sa = (struct sockaddr_in6 *)info->rti_info[RTAX_NETMASK];
mask = mask_sa ? mask_sa->sin6_addr : in6mask128;
IN6_MASK_ADDR(&dst_sa->sin6_addr, &mask);
if (dst_sa->sin6_len < sizeof(struct sockaddr_in6)) {
printf("dst sin6_len too small\n");
return (EINVAL);
}
if (mask_sa && mask_sa->sin6_len < sizeof(struct sockaddr_in6)) {
printf("mask sin6_len too small\n");
return (EINVAL);
}
fill_sockaddr_inet6(dst_sa, &dst_sa->sin6_addr, 0);
if (!IN6_ARE_ADDR_EQUAL(&mask, &in6mask128))
fill_sockaddr_inet6(mask_sa, &mask, 0);
else
remove_netmask(info);
/* Check gateway */
if (info->rti_info[RTAX_GATEWAY] != NULL)
return (cleanup_xaddrs_gateway(info));
return (0);
}
#endif
static int
cleanup_xaddrs(struct rt_addrinfo *info)
{
int error = EAFNOSUPPORT;
if (info->rti_info[RTAX_DST] == NULL)
return (EINVAL);
if (info->rti_flags & RTF_LLDATA) {
/*
* arp(8)/ndp(8) sends RTA_NETMASK for the associated
* prefix along with the actual address in RTA_DST.
* Remove netmask to avoid unnecessary address masking.
*/
remove_netmask(info);
}
switch (info->rti_info[RTAX_DST]->sa_family) {
case AF_INET:
error = cleanup_xaddrs_inet(info);
break;
#ifdef INET6
case AF_INET6:
error = cleanup_xaddrs_inet6(info);
break;
#endif
}
return (error);
}
static int
rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
struct nhop_object *nh, union sockaddr_union *saun, struct ucred *cred)
{
#if defined(INET) || defined(INET6)
struct epoch_tracker et;
#endif
/* First, see if the returned address is part of the jail. */
if (prison_if(cred, nh->nh_ifa->ifa_addr) == 0) {
info->rti_info[RTAX_IFA] = nh->nh_ifa->ifa_addr;
return (0);
}
switch (info->rti_info[RTAX_DST]->sa_family) {
case AF_INET:
{
struct in_addr ia;
struct ifaddr *ifa;
int found;
found = 0;
/*
* Try to find an address on the given outgoing interface
* that belongs to the jail.
*/
NET_EPOCH_ENTER(et);
CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
struct sockaddr *sa;
sa = ifa->ifa_addr;
if (sa->sa_family != AF_INET)
continue;
ia = ((struct sockaddr_in *)sa)->sin_addr;
if (prison_check_ip4(cred, &ia) == 0) {
found = 1;
break;
}
}
NET_EPOCH_EXIT(et);
if (!found) {
/*
* As a last resort return the 'default' jail address.
*/
ia = ((struct sockaddr_in *)nh->nh_ifa->ifa_addr)->
sin_addr;
if (prison_get_ip4(cred, &ia) != 0)
return (ESRCH);
}
bzero(&saun->sin, sizeof(struct sockaddr_in));
saun->sin.sin_len = sizeof(struct sockaddr_in);
saun->sin.sin_family = AF_INET;
saun->sin.sin_addr.s_addr = ia.s_addr;
info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
break;
}
#ifdef INET6
case AF_INET6:
{
struct in6_addr ia6;
struct ifaddr *ifa;
int found;
found = 0;
/*
* Try to find an address on the given outgoing interface
* that belongs to the jail.
*/
NET_EPOCH_ENTER(et);
CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
struct sockaddr *sa;
sa = ifa->ifa_addr;
if (sa->sa_family != AF_INET6)
continue;
bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
&ia6, sizeof(struct in6_addr));
if (prison_check_ip6(cred, &ia6) == 0) {
found = 1;
break;
}
}
NET_EPOCH_EXIT(et);
if (!found) {
/*
* As a last resort return the 'default' jail address.
*/
ia6 = ((struct sockaddr_in6 *)nh->nh_ifa->ifa_addr)->
sin6_addr;
if (prison_get_ip6(cred, &ia6) != 0)
return (ESRCH);
}
bzero(&saun->sin6, sizeof(struct sockaddr_in6));
saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
saun->sin6.sin6_family = AF_INET6;
bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
if (sa6_recoverscope(&saun->sin6) != 0)
return (ESRCH);
info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
break;
}
#endif
default:
return (ESRCH);
}
return (0);
}
static int
fill_blackholeinfo(struct rt_addrinfo *info, union sockaddr_union *saun)
{
struct ifaddr *ifa;
sa_family_t saf;
if (V_loif == NULL) {
printf("Unable to add blackhole/reject nhop without loopback");
return (ENOTSUP);
}
info->rti_ifp = V_loif;
saf = info->rti_info[RTAX_DST]->sa_family;
CK_STAILQ_FOREACH(ifa, &info->rti_ifp->if_addrhead, ifa_link) {
if (ifa->ifa_addr->sa_family == saf) {
info->rti_ifa = ifa;
break;
}
}
if (info->rti_ifa == NULL)
return (ENOTSUP);
bzero(saun, sizeof(union sockaddr_union));
switch (saf) {
case AF_INET:
saun->sin.sin_family = AF_INET;
saun->sin.sin_len = sizeof(struct sockaddr_in);
saun->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
break;
#ifdef INET6
case AF_INET6:
saun->sin6.sin6_family = AF_INET6;
saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
saun->sin6.sin6_addr = in6addr_loopback;
break;
#endif
default:
return (ENOTSUP);
}
info->rti_info[RTAX_GATEWAY] = &saun->sa;
info->rti_flags |= RTF_GATEWAY;
return (0);
}
/*
* Fills in @info based on userland-provided @rtm message.
*
* Returns 0 on success.
*/
static int
fill_addrinfo(struct rt_msghdr *rtm, int len, u_int fibnum, struct rt_addrinfo *info)
{
int error;
sa_family_t saf;
rtm->rtm_pid = curproc->p_pid;
info->rti_addrs = rtm->rtm_addrs;
info->rti_mflags = rtm->rtm_inits;
info->rti_rmx = &rtm->rtm_rmx;
/*
* rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6
* link-local address because rtrequest requires addresses with
* embedded scope id.
*/
if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, info))
return (EINVAL);
if (rtm->rtm_flags & RTF_RNH_LOCKED)
return (EINVAL);
info->rti_flags = rtm->rtm_flags;
error = cleanup_xaddrs(info);
if (error != 0)
return (error);
saf = info->rti_info[RTAX_DST]->sa_family;
/*
* Verify that the caller has the appropriate privilege; RTM_GET
* is the only operation the non-superuser is allowed.
*/
if (rtm->rtm_type != RTM_GET) {
error = priv_check(curthread, PRIV_NET_ROUTE);
if (error != 0)
return (error);
}
/*
* The given gateway address may be an interface address.
* For example, issuing a "route change" command on a route
* entry that was created from a tunnel, and the gateway
* address given is the local end point. In this case the
* RTF_GATEWAY flag must be cleared or the destination will
* not be reachable even though there is no error message.
*/
if (info->rti_info[RTAX_GATEWAY] != NULL &&
info->rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
struct rt_addrinfo ginfo;
struct sockaddr *gdst;
struct sockaddr_storage ss;
bzero(&ginfo, sizeof(ginfo));
bzero(&ss, sizeof(ss));
ss.ss_len = sizeof(ss);
ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss;
gdst = info->rti_info[RTAX_GATEWAY];
/*
* A host route through the loopback interface is
* installed for each interface adddress. In pre 8.0
* releases the interface address of a PPP link type
* is not reachable locally. This behavior is fixed as
* part of the new L2/L3 redesign and rewrite work. The
* signature of this interface address route is the
* AF_LINK sa_family type of the gateway, and the
* rt_ifp has the IFF_LOOPBACK flag set.
*/
if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) {
if (ss.ss_family == AF_LINK &&
ginfo.rti_ifp->if_flags & IFF_LOOPBACK) {
info->rti_flags &= ~RTF_GATEWAY;
info->rti_flags |= RTF_GWFLAG_COMPAT;
}
rib_free_info(&ginfo);
}
}
return (0);
}
/*
* Returns pointer to array of nexthops with weights for
* given @nhg. Stores number of items in the array into @pnum_nhops.
*/
struct weightened_nhop *
nhgrp_get_nhops(struct nhgrp_object *nhg, uint32_t *pnum_nhops)
{
struct nhgrp_priv *nhg_priv;
KASSERT(((nhg->nhg_flags & MPF_MULTIPATH) != 0), ("nhop is not mpath"));
nhg_priv = NHGRP_PRIV(nhg);
*pnum_nhops = nhg_priv->nhg_nh_count;
return (nhg_priv->nhg_nh_weights);
}
static struct nhop_object *
select_nhop(struct nhop_object *nh, const struct sockaddr *gw)
{
if (!NH_IS_NHGRP(nh))
return (nh);
#ifdef ROUTE_MPATH
struct weightened_nhop *wn;
uint32_t num_nhops;
wn = nhgrp_get_nhops((struct nhgrp_object *)nh, &num_nhops);
if (gw == NULL)
return (wn[0].nh);
for (int i = 0; i < num_nhops; i++) {
if (match_nhop_gw(wn[i].nh, gw))
return (wn[i].nh);
}
#endif
return (NULL);
}
/*
* Handles RTM_GET message from routing socket, returning matching rt.
*
* Returns:
* 0 on success, with locked and referenced matching rt in @rt_nrt
* errno of failure
*/
static int
handle_rtm_get(struct rt_addrinfo *info, u_int fibnum,
struct rt_msghdr *rtm, struct rib_cmd_info *rc)
{
RIB_RLOCK_TRACKER;
struct rib_head *rnh;
struct nhop_object *nh;
sa_family_t saf;
saf = info->rti_info[RTAX_DST]->sa_family;
rnh = rt_tables_get_rnh(fibnum, saf);
if (rnh == NULL)
return (EAFNOSUPPORT);
RIB_RLOCK(rnh);
/*
* By (implicit) convention host route (one without netmask)
* means longest-prefix-match request and the route with netmask
* means exact-match lookup.
* As cleanup_xaddrs() cleans up info flags&addrs for the /32,/128
* prefixes, use original data to check for the netmask presence.
*/
if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
/*
* Provide longest prefix match for
* address lookup (no mask).
* 'route -n get addr'
*/
rc->rc_rt = (struct rtentry *) rnh->rnh_matchaddr(
info->rti_info[RTAX_DST], &rnh->head);
} else
rc->rc_rt = (struct rtentry *) rnh->rnh_lookup(
info->rti_info[RTAX_DST],
info->rti_info[RTAX_NETMASK], &rnh->head);
if (rc->rc_rt == NULL) {
RIB_RUNLOCK(rnh);
return (ESRCH);
}
nh = select_nhop(rt_get_raw_nhop(rc->rc_rt), info->rti_info[RTAX_GATEWAY]);
if (nh == NULL) {
RIB_RUNLOCK(rnh);
return (ESRCH);
}
/*
* If performing proxied L2 entry insertion, and
* the actual PPP host entry is found, perform
* another search to retrieve the prefix route of
* the local end point of the PPP link.
* TODO: move this logic to userland.
*/
if (rtm->rtm_flags & RTF_ANNOUNCE) {
struct sockaddr laddr;
if (nh->nh_ifp != NULL &&
nh->nh_ifp->if_type == IFT_PROPVIRTUAL) {
struct ifaddr *ifa;
ifa = ifa_ifwithnet(info->rti_info[RTAX_DST], 1,
RT_ALL_FIBS);
if (ifa != NULL)
rt_maskedcopy(ifa->ifa_addr,
&laddr,
ifa->ifa_netmask);
} else
rt_maskedcopy(nh->nh_ifa->ifa_addr,
&laddr,
nh->nh_ifa->ifa_netmask);
/*
* refactor rt and no lock operation necessary
*/
rc->rc_rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr,
&rnh->head);
if (rc->rc_rt == NULL) {
RIB_RUNLOCK(rnh);
return (ESRCH);
}
nh = select_nhop(rt_get_raw_nhop(rc->rc_rt), info->rti_info[RTAX_GATEWAY]);
if (nh == NULL) {
RIB_RUNLOCK(rnh);
return (ESRCH);
}
}
rc->rc_nh_new = nh;
rc->rc_nh_weight = rc->rc_rt->rt_weight;
RIB_RUNLOCK(rnh);
return (0);
}
/*
* Writes information related to @rtinfo object to preallocated buffer.
* Stores needed size in @plen. If @w is NULL, calculates size without
* writing.
* Used for sysctl dumps and rtsock answers (RTM_DEL/RTM_GET) generation.
*
* Returns 0 on success.
*
*/
static int
rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, struct walkarg *w, int *plen)
{
int i;
int len, buflen = 0, dlen;
caddr_t cp = NULL;
struct rt_msghdr *rtm = NULL;
#ifdef INET6
struct sockaddr_storage ss;
struct sockaddr_in6 *sin6;
#endif
switch (type) {
case RTM_DELADDR:
case RTM_NEWADDR:
if (w != NULL && w->w_op == NET_RT_IFLISTL) {
#ifdef COMPAT_FREEBSD32
if (w->w_req->flags & SCTL_MASK32)
len = sizeof(struct ifa_msghdrl32);
else
#endif
len = sizeof(struct ifa_msghdrl);
} else
len = sizeof(struct ifa_msghdr);
break;
case RTM_IFINFO:
#ifdef COMPAT_FREEBSD32
if (w != NULL && w->w_req->flags & SCTL_MASK32) {
if (w->w_op == NET_RT_IFLISTL)
len = sizeof(struct if_msghdrl32);
else
len = sizeof(struct if_msghdr32);
break;
}
#endif
if (w != NULL && w->w_op == NET_RT_IFLISTL)
len = sizeof(struct if_msghdrl);
else
len = sizeof(struct if_msghdr);
break;
case RTM_NEWMADDR:
len = sizeof(struct ifma_msghdr);
break;
default:
len = sizeof(struct rt_msghdr);
}
if (w != NULL) {
rtm = (struct rt_msghdr *)w->w_tmem;
buflen = w->w_tmemsize - len;
cp = (caddr_t)w->w_tmem + len;
}
rtinfo->rti_addrs = 0;
for (i = 0; i < RTAX_MAX; i++) {
struct sockaddr *sa;
if ((sa = rtinfo->rti_info[i]) == NULL)
continue;
rtinfo->rti_addrs |= (1 << i);
dlen = SA_SIZE(sa);
if (cp != NULL && buflen >= dlen) {
#ifdef INET6
if (sa->sa_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)&ss;
bcopy(sa, sin6, sizeof(*sin6));
if (sa6_recoverscope(sin6) == 0)
sa = (struct sockaddr *)sin6;
}
#endif
bcopy((caddr_t)sa, cp, (unsigned)dlen);
cp += dlen;
buflen -= dlen;
} else if (cp != NULL) {
/*
* Buffer too small. Count needed size
* and return with error.
*/
cp = NULL;
}
len += dlen;
}
if (cp != NULL) {
dlen = ALIGN(len) - len;
if (buflen < dlen)
cp = NULL;
else
buflen -= dlen;
}
len = ALIGN(len);
if (cp != NULL) {
/* fill header iff buffer is large enough */
rtm->rtm_version = RTM_VERSION;
rtm->rtm_type = type;
rtm->rtm_msglen = len;
}
*plen = len;
if (w != NULL && cp == NULL)
return (ENOBUFS);
return (0);
}
#if 0
/*
* Fill in @dmask with valid netmask leaving original @smask
* intact. Mostly used with radix netmasks.
*/
struct sockaddr *
rtsock_fix_netmask(const struct sockaddr *dst, const struct sockaddr *smask,
struct sockaddr_storage *dmask)
{
if (dst == NULL || smask == NULL)
return (NULL);
memset(dmask, 0, dst->sa_len);
memcpy(dmask, smask, smask->sa_len);
dmask->ss_len = dst->sa_len;
dmask->ss_family = dst->sa_family;
return ((struct sockaddr *)dmask);
}
#endif
static void
rt_getmetrics(const struct rtentry *rt, const struct nhop_object *nh,
struct rt_metrics *out)
{
bzero(out, sizeof(*out));
out->rmx_mtu = nh->nh_mtu;
out->rmx_weight = rt->rt_weight;
out->rmx_nhidx = nhop_get_idx(nh);
/* Kernel -> userland timebase conversion. */
out->rmx_expire = rt->rt_expire ?
rt->rt_expire - time_uptime + time_second : 0;
}
static void
init_sockaddrs_family(int family, union sockaddr_union *dst, union sockaddr_union *mask)
{
if (family == AF_INET) {
struct sockaddr_in *dst4 = &(dst->sin);
struct sockaddr_in *mask4 = &(mask->sin);
bzero(dst4, sizeof(struct sockaddr_in));
bzero(mask4, sizeof(struct sockaddr_in));
dst4->sin_family = AF_INET;
dst4->sin_len = sizeof(struct sockaddr_in);
mask4->sin_family = AF_INET;
mask4->sin_len = sizeof(struct sockaddr_in);
}
#ifdef INET6
if (family == AF_INET6) {
struct sockaddr_in6 *dst6 = &(dst->sin6);
struct sockaddr_in6 *mask6 = &(mask->sin6);
bzero(dst6, sizeof(struct sockaddr_in6));
bzero(mask6, sizeof(struct sockaddr_in6));
dst6->sin6_family = AF_INET6;
dst6->sin6_len = sizeof(struct sockaddr_in6);
mask6->sin6_family = AF_INET6;
mask6->sin6_len = sizeof(struct sockaddr_in6);
}
#endif
}
static void
export_rtaddrs(const struct rtentry *rt, struct sockaddr *dst,
struct sockaddr *mask)
{
if (dst->sa_family == AF_INET) {
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
struct sockaddr_in *mask4 = (struct sockaddr_in *)mask;
uint32_t scopeid = 0;
rt_get_inet_prefix_pmask(rt, &dst4->sin_addr, &mask4->sin_addr,
&scopeid);
return;
}
#ifdef INET6
if (dst->sa_family == AF_INET6) {
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask;
uint32_t scopeid = 0;
rt_get_inet6_prefix_pmask(rt, &dst6->sin6_addr,
&mask6->sin6_addr, &scopeid);
dst6->sin6_scope_id = scopeid;
return;
}
#endif
}
static int
update_rtm_from_rc(struct rt_addrinfo *info, struct rt_msghdr **prtm,
int alloc_len, struct rib_cmd_info *rc, struct nhop_object *nh, unsigned maxlen)
{
struct walkarg w;
union sockaddr_union saun;
struct rt_msghdr *rtm, *orig_rtm = NULL;
struct ifnet *ifp;
int error, len;
rtm = *prtm;
union sockaddr_union sa_dst, sa_mask;
int family = info->rti_info[RTAX_DST]->sa_family;
init_sockaddrs_family(family, &sa_dst, &sa_mask);
export_rtaddrs(rc->rc_rt, &sa_dst.sa, &sa_mask.sa);
info->rti_info[RTAX_DST] = &sa_dst.sa;
info->rti_info[RTAX_NETMASK] = rt_is_host(rc->rc_rt) ? NULL : &sa_mask.sa;
info->rti_info[RTAX_GATEWAY] = &nh->gw_sa;
info->rti_info[RTAX_GENMASK] = 0;
ifp = nh->nh_ifp;
if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
if (ifp) {
info->rti_info[RTAX_IFP] =
ifp->if_addr->ifa_addr;
error = rtm_get_jailed(info, ifp, nh,
&saun, curthread->td_ucred);
if (error != 0)
return (error);
if (ifp->if_flags & IFF_POINTOPOINT)
info->rti_info[RTAX_BRD] =
nh->nh_ifa->ifa_dstaddr;
rtm->rtm_index = ifp->if_index;
} else {
info->rti_info[RTAX_IFP] = NULL;
info->rti_info[RTAX_IFA] = NULL;
}
} else if (ifp != NULL)
rtm->rtm_index = ifp->if_index;
/* Check if we need to realloc storage */
rtsock_msg_buffer(rtm->rtm_type, info, NULL, &len);
if (len > maxlen) {
return (ENOBUFS);
}
if (len > alloc_len) {
struct rt_msghdr *tmp_rtm;
tmp_rtm = malloc(len, M_TEMP, M_NOWAIT);
if (tmp_rtm == NULL)
return (ENOBUFS);
bcopy(rtm, tmp_rtm, rtm->rtm_msglen);
orig_rtm = rtm;
rtm = tmp_rtm;
alloc_len = len;
/*
* Delay freeing original rtm as info contains
* data referencing it.
*/
}
w.w_tmem = (caddr_t)rtm;
w.w_tmemsize = alloc_len;
rtsock_msg_buffer(rtm->rtm_type, info, &w, &len);
rtm->rtm_flags = rc->rc_rt->rte_flags | nhop_get_rtflags(nh);
if (rtm->rtm_flags & RTF_GWFLAG_COMPAT)
rtm->rtm_flags = RTF_GATEWAY |
(rtm->rtm_flags & ~RTF_GWFLAG_COMPAT);
rt_getmetrics(rc->rc_rt, nh, &rtm->rtm_rmx);
rtm->rtm_rmx.rmx_weight = rc->rc_nh_weight;
rtm->rtm_addrs = info->rti_addrs;
if (orig_rtm != NULL)
free(orig_rtm, M_TEMP);
*prtm = rtm;
return (0);
}
/*
* Checks if rte can be exported v.r.t jails/vnets.
*
* Returns 1 if it can, 0 otherwise.
*/
static bool
can_export_rte(struct ucred *td_ucred, bool rt_is_host,
const struct sockaddr *rt_dst)
{
if ((!rt_is_host) ? jailed_without_vnet(td_ucred)
: prison_if(td_ucred, rt_dst) != 0)
return (false);
return (true);
}
int
ff_rtioctl(int fibnum, void *data, unsigned *plen, unsigned maxlen)
{
struct rt_msghdr *rtm = NULL;
struct rtentry *rt = NULL;
struct rt_addrinfo info;
struct epoch_tracker et;
#ifdef INET6
struct sockaddr_storage ss;
struct sockaddr_in6 *sin6;
int i, rti_need_deembed = 0;
#endif
int alloc_len = 0, len, error = 0;
sa_family_t saf = AF_UNSPEC;
struct rib_cmd_info rc;
struct nhop_object *nh;
#define senderr(e) { error = e; goto flush;}
len = *plen;
/*
* Most of current messages are in range 200-240 bytes,
* minimize possible re-allocation on reply using larger size
* buffer aligned on 1k boundaty.
*/
alloc_len = roundup2(len, 1024);
if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL)
senderr(ENOBUFS);
bcopy(data, (caddr_t)rtm, len);
if (len < sizeof(*rtm) || len != rtm->rtm_msglen)
senderr(EINVAL);
bzero(&info, sizeof(info));
nh = NULL;
if (rtm->rtm_version != RTM_VERSION) {
/* Do not touch message since format is unknown */
free(rtm, M_TEMP);
rtm = NULL;
senderr(EPROTONOSUPPORT);
}
/*
* Starting from here, it is possible
* to alter original message and insert
* caller PID and error value.
*/
if ((error = fill_addrinfo(rtm, len, fibnum, &info)) != 0) {
senderr(error);
}
saf = info.rti_info[RTAX_DST]->sa_family;
/* support for new ARP code */
if (rtm->rtm_flags & RTF_LLDATA) {
error = lla_rt_output(rtm, &info);
#ifdef INET6
if (error == 0)
rti_need_deembed = 1;
#endif
goto flush;
}
union sockaddr_union gw_saun;
int blackhole_flags = rtm->rtm_flags & (RTF_BLACKHOLE|RTF_REJECT);
if (blackhole_flags != 0) {
if (blackhole_flags != (RTF_BLACKHOLE | RTF_REJECT))
error = fill_blackholeinfo(&info, &gw_saun);
else
error = EINVAL;
if (error != 0)
senderr(error);
/* TODO: rebuild rtm from scratch */
}
switch (rtm->rtm_type) {
case RTM_ADD:
case RTM_CHANGE:
if (rtm->rtm_type == RTM_ADD) {
if (info.rti_info[RTAX_GATEWAY] == NULL)
senderr(EINVAL);
}
error = rib_action(fibnum, rtm->rtm_type, &info, &rc);
if (error == 0) {
#ifdef INET6
rti_need_deembed = 1;
#endif
#ifdef ROUTE_MPATH
if (NH_IS_NHGRP(rc.rc_nh_new) ||
(rc.rc_nh_old && NH_IS_NHGRP(rc.rc_nh_old))) {
struct rib_cmd_info rc_simple = {};
rib_decompose_notification(&rc,
save_add_notification, (void *)&rc_simple);
rc = rc_simple;
}
#endif
nh = rc.rc_nh_new;
rtm->rtm_index = nh->nh_ifp->if_index;
rtm->rtm_flags = rc.rc_rt->rte_flags | nhop_get_rtflags(nh);
}
break;
case RTM_DELETE:
error = rib_action(fibnum, RTM_DELETE, &info, &rc);
if (error == 0) {
#ifdef ROUTE_MPATH
if (NH_IS_NHGRP(rc.rc_nh_old) ||
(rc.rc_nh_new && NH_IS_NHGRP(rc.rc_nh_new))) {
struct rib_cmd_info rc_simple = {};
rib_decompose_notification(&rc,
save_del_notification, (void *)&rc_simple);
rc = rc_simple;
}
#endif
nh = rc.rc_nh_old;
goto report;
}
#ifdef INET6
/* rt_msg2() will not be used when RTM_DELETE fails. */
rti_need_deembed = 1;
#endif
break;
case RTM_GET:
error = handle_rtm_get(&info, fibnum, rtm, &rc);
if (error != 0)
senderr(error);
nh = rc.rc_nh_new;
report:
if (!can_export_rte(curthread->td_ucred,
info.rti_info[RTAX_NETMASK] == NULL,
info.rti_info[RTAX_DST])) {
senderr(ESRCH);
}
error = update_rtm_from_rc(&info, &rtm, alloc_len, &rc, nh, maxlen);
/*
* Note that some sockaddr pointers may have changed to
* point to memory outsize @rtm. Some may be pointing
* to the on-stack variables.
* Given that, any pointer in @info CANNOT BE USED.
*/
/*
* scopeid deembedding has been performed while
* writing updated rtm in rtsock_msg_buffer().
* With that in mind, skip deembedding procedure below.
*/
#ifdef INET6
rti_need_deembed = 0;
#endif
if (error != 0)
senderr(error);
break;
default:
senderr(EOPNOTSUPP);
}
flush:
NET_EPOCH_EXIT(et);
rt = NULL;
if (rtm != NULL) {
#ifdef INET6
if (rti_need_deembed) {
/* sin6_scope_id is recovered before sending rtm. */
sin6 = (struct sockaddr_in6 *)&ss;
for (i = 0; i < RTAX_MAX; i++) {
if (info.rti_info[i] == NULL)
continue;
if (info.rti_info[i]->sa_family != AF_INET6)
continue;
bcopy(info.rti_info[i], sin6, sizeof(*sin6));
if (sa6_recoverscope(sin6) == 0)
bcopy(sin6, info.rti_info[i],
sizeof(*sin6));
}
}
#endif
if (error != 0)
rtm->rtm_errno = error;
else
rtm->rtm_flags |= RTF_DONE;
bcopy((caddr_t)rtm, data, rtm->rtm_msglen);
*plen = rtm->rtm_msglen;
free(rtm, M_TEMP);
}
if (error != 0) {
ff_os_errno(error);
return (-1);
}
return (error);
}
#if 0
int
ff_rtioctl_old(int fibnum, void *data, unsigned *plen, unsigned maxlen)
{
struct rt_msghdr *rtm = NULL;
struct rtentry *rt = NULL;
struct rib_head *rnh;
struct rt_addrinfo info;
union sockaddr_union saun;
sa_family_t saf = AF_UNSPEC;
struct sockaddr_storage ss;
struct walkarg w;
int error = 0, alloc_len = 0, len;
struct ifnet *ifp = NULL;
#ifdef INET6
struct sockaddr_in6 *sin6;
int i, rti_need_deembed = 0;
#endif
#define senderr(e) { error = e; goto flush;}
len = *plen;
/*
* Most of current messages are in range 200-240 bytes,
* minimize possible re-allocation on reply using larger size
* buffer aligned on 1k boundaty.
*/
alloc_len = roundup2(len, 1024);
if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL)
senderr(ENOBUFS);
bcopy(data, (caddr_t)rtm, len);
if (len < sizeof(*rtm) || len != rtm->rtm_msglen)
senderr(EINVAL);
bzero(&info, sizeof(info));
bzero(&w, sizeof(w));
if (rtm->rtm_version != RTM_VERSION)
senderr(EPROTONOSUPPORT);
/*
* Starting from here, it is possible
* to alter original message and insert
* caller PID and error value.
*/
rtm->rtm_pid = curproc->p_pid;
info.rti_addrs = rtm->rtm_addrs;
info.rti_mflags = rtm->rtm_inits;
info.rti_rmx = &rtm->rtm_rmx;
/*
* rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6
* link-local address because rtrequest requires addresses with
* embedded scope id.
*/
if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info))
senderr(EINVAL);
info.rti_flags = rtm->rtm_flags;
if (info.rti_info[RTAX_DST] == NULL ||
info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
(info.rti_info[RTAX_GATEWAY] != NULL &&
info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
senderr(EINVAL);
saf = info.rti_info[RTAX_DST]->sa_family;
/*
* The given gateway address may be an interface address.
* For example, issuing a "route change" command on a route
* entry that was created from a tunnel, and the gateway
* address given is the local end point. In this case the
* RTF_GATEWAY flag must be cleared or the destination will
* not be reachable even though there is no error message.
*/
if (info.rti_info[RTAX_GATEWAY] != NULL &&
info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
struct rt_addrinfo ginfo;
struct sockaddr *gdst;
bzero(&ginfo, sizeof(ginfo));
bzero(&ss, sizeof(ss));
ss.ss_len = sizeof(ss);
ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss;
gdst = info.rti_info[RTAX_GATEWAY];
/*
* A host route through the loopback interface is
* installed for each interface adddress. In pre 8.0
* releases the interface address of a PPP link type
* is not reachable locally. This behavior is fixed as
* part of the new L2/L3 redesign and rewrite work. The
* signature of this interface address route is the
* AF_LINK sa_family type of the rt_gateway, and the
* rt_ifp has the IFF_LOOPBACK flag set.
*/
if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) {
if (ss.ss_family == AF_LINK &&
ginfo.rti_ifp->if_flags & IFF_LOOPBACK) {
info.rti_flags &= ~RTF_GATEWAY;
info.rti_flags |= RTF_GWFLAG_COMPAT;
}
rib_free_info(&ginfo);
}
}
switch (rtm->rtm_type) {
struct rtentry *saved_nrt;
case RTM_ADD:
case RTM_CHANGE:
if (info.rti_info[RTAX_GATEWAY] == NULL)
senderr(EINVAL);
saved_nrt = NULL;
/* support for new ARP code */
if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
(rtm->rtm_flags & RTF_LLDATA) != 0) {
error = lla_rt_output(rtm, &info);
#ifdef INET6
if (error == 0)
rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
#endif
break;
}
error = rtrequest1_fib(rtm->rtm_type, &info, &saved_nrt,
fibnum);
if (error == 0 && saved_nrt != NULL) {
#ifdef INET6
rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
#endif
RT_LOCK(saved_nrt);
rtm->rtm_index = saved_nrt->rt_ifp->if_index;
RT_REMREF(saved_nrt);
RT_UNLOCK(saved_nrt);
}
break;
case RTM_DELETE:
saved_nrt = NULL;
/* support for new ARP code */
if (info.rti_info[RTAX_GATEWAY] &&
(info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
(rtm->rtm_flags & RTF_LLDATA) != 0) {
error = lla_rt_output(rtm, &info);
#ifdef INET6
if (error == 0)
rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
#endif
break;
}
error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, fibnum);
if (error == 0) {
RT_LOCK(saved_nrt);
rt = saved_nrt;
goto report;
}
#ifdef INET6
/* rt_msg2() will not be used when RTM_DELETE fails. */
rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
#endif
break;
case RTM_GET:
rnh = rt_tables_get_rnh(fibnum, saf);
if (rnh == NULL)
senderr(EAFNOSUPPORT);
RIB_RLOCK(rnh);
if (info.rti_info[RTAX_NETMASK] == NULL &&
rtm->rtm_type == RTM_GET) {
/*
* Provide logest prefix match for
* address lookup (no mask).
* 'route -n get addr'
*/
rt = (struct rtentry *) rnh->rnh_matchaddr(
info.rti_info[RTAX_DST], &rnh->head);
} else
rt = (struct rtentry *) rnh->rnh_lookup(
info.rti_info[RTAX_DST],
info.rti_info[RTAX_NETMASK], &rnh->head);
if (rt == NULL) {
RIB_RUNLOCK(rnh);
senderr(ESRCH);
}
#ifdef RADIX_MPATH
/*
* for RTM_CHANGE/LOCK, if we got multipath routes,
* we require users to specify a matching RTAX_GATEWAY.
*
* for RTM_GET, gate is optional even with multipath.
* if gate == NULL the first match is returned.
* (no need to call rt_mpath_matchgate if gate == NULL)
*/
if (rt_mpath_capable(rnh) &&
(rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
if (!rt) {
RIB_RUNLOCK(rnh);
senderr(ESRCH);
}
}
#endif
/*
* If performing proxied L2 entry insertion, and
* the actual PPP host entry is found, perform
* another search to retrieve the prefix route of
* the local end point of the PPP link.
*/
if (rtm->rtm_flags & RTF_ANNOUNCE) {
struct sockaddr laddr;
if (rt->rt_ifp != NULL &&
rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
struct ifaddr *ifa;
ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1,
RT_ALL_FIBS);
if (ifa != NULL)
rt_maskedcopy(ifa->ifa_addr,
&laddr,
ifa->ifa_netmask);
} else
rt_maskedcopy(rt->rt_ifa->ifa_addr,
&laddr,
rt->rt_ifa->ifa_netmask);
/*
* refactor rt and no lock operation necessary
*/
rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr,
&rnh->head);
if (rt == NULL) {
RIB_RUNLOCK(rnh);
senderr(ESRCH);
}
}
RT_LOCK(rt);
RT_ADDREF(rt);
RIB_RUNLOCK(rnh);
report:
RT_LOCK_ASSERT(rt);
if ((rt->rt_flags & RTF_HOST) == 0
? jailed_without_vnet(curthread->td_ucred)
: prison_if(curthread->td_ucred,
rt_key(rt)) != 0) {
RT_UNLOCK(rt);
senderr(ESRCH);
}
info.rti_info[RTAX_DST] = rt_key(rt);
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt),
rt_mask(rt), &ss);
info.rti_info[RTAX_GENMASK] = 0;
if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
ifp = rt->rt_ifp;
if (ifp) {
info.rti_info[RTAX_IFP] =
ifp->if_addr->ifa_addr;
error = rtm_get_jailed(&info, ifp, rt,
&saun, curthread->td_ucred);
if (error != 0) {
RT_UNLOCK(rt);
senderr(error);
}
if (ifp->if_flags & IFF_POINTOPOINT)
info.rti_info[RTAX_BRD] =
rt->rt_ifa->ifa_dstaddr;
rtm->rtm_index = ifp->if_index;
} else {
info.rti_info[RTAX_IFP] = NULL;
info.rti_info[RTAX_IFA] = NULL;
}
} else if ((ifp = rt->rt_ifp) != NULL) {
rtm->rtm_index = ifp->if_index;
}
/* Check if we need to realloc storage */
rtsock_msg_buffer(rtm->rtm_type, &info, NULL, &len);
if (len > maxlen) {
RT_UNLOCK(rt);
senderr(ENOBUFS);
}
if (len > alloc_len) {
struct rt_msghdr *new_rtm;
new_rtm = malloc(len, M_TEMP, M_NOWAIT);
if (new_rtm == NULL) {
RT_UNLOCK(rt);
senderr(ENOBUFS);
}
bcopy(rtm, new_rtm, rtm->rtm_msglen);
free(rtm, M_TEMP);
rtm = new_rtm;
alloc_len = len;
}
w.w_tmem = (caddr_t)rtm;
w.w_tmemsize = alloc_len;
rtsock_msg_buffer(rtm->rtm_type, &info, &w, &len);
if (rt->rt_flags & RTF_GWFLAG_COMPAT)
rtm->rtm_flags = RTF_GATEWAY |
(rt->rt_flags & ~RTF_GWFLAG_COMPAT);
else
rtm->rtm_flags = rt->rt_flags;
rt_getmetrics(rt, &rtm->rtm_rmx);
rtm->rtm_addrs = info.rti_addrs;
RT_UNLOCK(rt);
break;
default:
senderr(EOPNOTSUPP);
}
flush:
if (rt != NULL)
RTFREE(rt);
if (rtm != NULL) {
#ifdef INET6
if (rti_need_deembed) {
/* sin6_scope_id is recovered before sending rtm. */
sin6 = (struct sockaddr_in6 *)&ss;
for (i = 0; i < RTAX_MAX; i++) {
if (info.rti_info[i] == NULL)
continue;
if (info.rti_info[i]->sa_family != AF_INET6)
continue;
bcopy(info.rti_info[i], sin6, sizeof(*sin6));
if (sa6_recoverscope(sin6) == 0)
bcopy(sin6, info.rti_info[i],
sizeof(*sin6));
}
}
#endif
if (error != 0)
rtm->rtm_errno = error;
else
rtm->rtm_flags |= RTF_DONE;
bcopy((caddr_t)rtm, data, rtm->rtm_msglen);
*plen = rtm->rtm_msglen;
free(rtm, M_TEMP);
}
if (error != 0) {
ff_os_errno(error);
return (-1);
}
return (error);
}
#endif