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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright 2019 Conrad Meyer <cem@FreeBSD.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/ctype.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/rmlock.h>
#include <ddb/ddb.h>
#include <ddb/db_lex.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/route/route_ctl.h>
#include <net/route/route_var.h>
/*
* Unfortunately, RTF_ values are expressed as raw masks rather than powers of
* 2, so we cannot use them as nice C99 initializer indices below.
*/
static const char * const rtf_flag_strings[] = {
"UP",
"GATEWAY",
"HOST",
"REJECT",
"DYNAMIC",
"MODIFIED",
"DONE",
"UNUSED_0x80",
"UNUSED_0x100",
"XRESOLVE",
"LLDATA",
"STATIC",
"BLACKHOLE",
"UNUSED_0x2000",
"PROTO2",
"PROTO1",
"UNUSED_0x10000",
"UNUSED_0x20000",
"PROTO3",
"FIXEDMTU",
"PINNED",
"LOCAL",
"BROADCAST",
"MULTICAST",
/* Big gap. */
[28] = "STICKY",
[30] = "RNH_LOCKED",
[31] = "GWFLAG_COMPAT",
};
static const char * __pure
rt_flag_name(unsigned idx)
{
if (idx >= nitems(rtf_flag_strings))
return ("INVALID_FLAG");
if (rtf_flag_strings[idx] == NULL)
return ("UNKNOWN");
return (rtf_flag_strings[idx]);
}
static void
rt_dumpaddr_ddb(const char *name, const struct sockaddr *sa)
{
char buf[INET6_ADDRSTRLEN], *res;
res = NULL;
if (sa == NULL)
res = "NULL";
else if (sa->sa_family == AF_INET) {
res = inet_ntop(AF_INET,
&((const struct sockaddr_in *)sa)->sin_addr,
buf, sizeof(buf));
} else if (sa->sa_family == AF_INET6) {
res = inet_ntop(AF_INET6,
&((const struct sockaddr_in6 *)sa)->sin6_addr,
buf, sizeof(buf));
} else if (sa->sa_family == AF_LINK) {
res = "on link";
}
if (res != NULL) {
db_printf("%s <%s> ", name, res);
return;
}
db_printf("%s <af:%d> ", name, sa->sa_family);
}
static int
rt_dumpentry_ddb(struct radix_node *rn, void *arg __unused)
{
struct sockaddr_storage ss;
struct rtentry *rt;
struct nhop_object *nh;
int flags, idx;
/* If RNTORT is important, put it in a header. */
rt = (void *)rn;
nh = (struct nhop_object *)rt->rt_nhop;
rt_dumpaddr_ddb("dst", rt_key(rt));
rt_dumpaddr_ddb("gateway", &rt->rt_nhop->gw_sa);
rt_dumpaddr_ddb("netmask", rtsock_fix_netmask(rt_key(rt), rt_mask(rt),
&ss));
if ((nh->nh_ifp->if_flags & IFF_DYING) == 0) {
rt_dumpaddr_ddb("ifp", nh->nh_ifp->if_addr->ifa_addr);
rt_dumpaddr_ddb("ifa", nh->nh_ifa->ifa_addr);
}
db_printf("flags ");
flags = rt->rte_flags | nhop_get_rtflags(nh);
if (flags == 0)
db_printf("none");
while ((idx = ffs(flags)) > 0) {
idx--;
db_printf("%s", rt_flag_name(idx));
flags &= ~(1ul << idx);
if (flags != 0)
db_printf(",");
}
db_printf("\n");
return (0);
}
DB_SHOW_COMMAND(routetable, db_show_routetable_cmd)
{
struct rib_head *rnh;
int error, i, lim;
if (have_addr)
i = lim = addr;
else {
i = 1;
lim = AF_MAX;
}
for (; i <= lim; i++) {
rnh = rt_tables_get_rnh(0, i);
if (rnh == NULL) {
if (have_addr) {
db_printf("%s: AF %d not supported?\n",
__func__, i);
break;
}
continue;
}
if (!have_addr && i > 1)
db_printf("\n");
db_printf("Route table for AF %d%s%s%s:\n", i,
(i == AF_INET || i == AF_INET6) ? " (" : "",
(i == AF_INET) ? "INET" : (i == AF_INET6) ? "INET6" : "",
(i == AF_INET || i == AF_INET6) ? ")" : "");
error = rnh->rnh_walktree(&rnh->head, rt_dumpentry_ddb, NULL);
if (error != 0)
db_printf("%s: walktree(%d): %d\n", __func__, i,
error);
}
}
DB_SHOW_COMMAND_FLAGS(route, db_show_route_cmd, CS_OWN)
{
char abuf[INET6_ADDRSTRLEN], *buf, *end;
struct rib_head *rh;
struct radix_node *rn;
void *dst_addrp;
struct rtentry *rt;
union {
struct sockaddr_in dest_sin;
struct sockaddr_in6 dest_sin6;
} u;
int af;
buf = db_get_line();
/* Remove whitespaces from both ends */
end = buf + strlen(buf) - 1;
for (; (end >= buf) && (*end=='\n' || isspace(*end)); end--)
*end = '\0';
while (isspace(*buf))
buf++;
/* Determine AF */
if (strchr(buf, ':') != NULL) {
af = AF_INET6;
u.dest_sin6.sin6_family = af;
u.dest_sin6.sin6_len = sizeof(struct sockaddr_in6);
dst_addrp = &u.dest_sin6.sin6_addr;
} else {
af = AF_INET;
u.dest_sin.sin_family = af;
u.dest_sin.sin_len = sizeof(struct sockaddr_in);
dst_addrp = &u.dest_sin.sin_addr;
}
if (inet_pton(af, buf, dst_addrp) != 1)
goto usage;
if (inet_ntop(af, dst_addrp, abuf, sizeof(abuf)) != NULL)
db_printf("Looking up route to destination '%s'\n", abuf);
rt = NULL;
CURVNET_SET(vnet0);
rh = rt_tables_get_rnh(RT_DEFAULT_FIB, af);
rn = rh->rnh_matchaddr(&u, &rh->head);
if (rn && ((rn->rn_flags & RNF_ROOT) == 0))
rt = (struct rtentry *)rn;
CURVNET_RESTORE();
if (rt == NULL) {
db_printf("Could not get route for that server.\n");
return;
}
rt_dumpentry_ddb((void *)rt, NULL);
return;
usage:
db_printf("Usage: 'show route <address>'\n"
" Currently accepts only IPv4 and IPv6 addresses\n");
db_skip_to_eol();
}
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