Move route-specific ddb commands to route/route_ddb.c
Currently functionality resides in rtsock.c, which is a controlling interface, partially external to the routing subsystem. Additionally, DDB-supporting functionality is > 100SLOC, which deserves a separate file. Given that, move this functionality to a newly-created net/route/ subdir. Reviewed by: cem Differential Revision: https://reviews.freebsd.org/D24561
This commit is contained in:
melifaro
parent
7c1be85b66
commit
ba5c497845
@ -4095,6 +4095,7 @@ net/route/nhop.c standard
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net/route/nhop_ctl.c standard
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net/route/nhop_utils.c standard
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net/route/route_ctl.c standard
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net/route/route_ddb.c optional ddb
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net/route/route_helpers.c standard
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net/route/route_temporal.c standard
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net/rss_config.c optional inet rss | inet6 rss
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@ -388,6 +388,8 @@ int rtsock_addrmsg(int, struct ifaddr *, int);
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int rtsock_routemsg(int, struct rtentry *, struct ifnet *ifp, int, int);
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int rtsock_routemsg_info(int, struct rt_addrinfo *, int);
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struct sockaddr *rtsock_fix_netmask(const struct sockaddr *dst,
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const struct sockaddr *smask, struct sockaddr_storage *dmask);
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/*
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* Note the following locking behavior:
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*
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458
sys/net/route/route_ddb.c
Normal file
458
sys/net/route/route_ddb.c
Normal file
@ -0,0 +1,458 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright 2019 Conrad Meyer <cem@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/rmlock.h>
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#include <ddb/ddb.h>
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#include <ddb/db_lex.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/vnet.h>
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#include <net/route.h>
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#include <net/route/route_var.h>
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#include <net/route/nhop.h>
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#include <netinet/in.h>
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/*
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* Unfortunately, RTF_ values are expressed as raw masks rather than powers of
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* 2, so we cannot use them as nice C99 initializer indices below.
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*/
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static const char * const rtf_flag_strings[] = {
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"UP",
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"GATEWAY",
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"HOST",
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"REJECT",
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"DYNAMIC",
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"MODIFIED",
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"DONE",
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"UNUSED_0x80",
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"UNUSED_0x100",
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"XRESOLVE",
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"LLDATA",
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"STATIC",
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"BLACKHOLE",
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"UNUSED_0x2000",
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"PROTO2",
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"PROTO1",
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"UNUSED_0x10000",
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"UNUSED_0x20000",
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"PROTO3",
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"FIXEDMTU",
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"PINNED",
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"LOCAL",
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"BROADCAST",
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"MULTICAST",
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/* Big gap. */
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[28] = "STICKY",
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[30] = "RNH_LOCKED",
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[31] = "GWFLAG_COMPAT",
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};
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static const char * __pure
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rt_flag_name(unsigned idx)
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{
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if (idx >= nitems(rtf_flag_strings))
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return ("INVALID_FLAG");
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if (rtf_flag_strings[idx] == NULL)
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return ("UNKNOWN");
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return (rtf_flag_strings[idx]);
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}
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static void
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rt_dumpaddr_ddb(const char *name, const struct sockaddr *sa)
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{
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char buf[INET6_ADDRSTRLEN], *res;
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res = NULL;
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if (sa == NULL)
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res = "NULL";
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else if (sa->sa_family == AF_INET) {
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res = inet_ntop(AF_INET,
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&((const struct sockaddr_in *)sa)->sin_addr,
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buf, sizeof(buf));
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} else if (sa->sa_family == AF_INET6) {
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res = inet_ntop(AF_INET6,
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&((const struct sockaddr_in6 *)sa)->sin6_addr,
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buf, sizeof(buf));
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} else if (sa->sa_family == AF_LINK) {
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res = "on link";
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}
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if (res != NULL) {
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db_printf("%s <%s> ", name, res);
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return;
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}
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db_printf("%s <af:%d> ", name, sa->sa_family);
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}
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static int
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rt_dumpentry_ddb(struct radix_node *rn, void *arg __unused)
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{
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struct sockaddr_storage ss;
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struct rtentry *rt;
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int flags, idx;
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/* If RNTORT is important, put it in a header. */
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rt = (void *)rn;
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rt_dumpaddr_ddb("dst", rt_key(rt));
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rt_dumpaddr_ddb("gateway", &rt->rt_nhop->gw_sa);
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rt_dumpaddr_ddb("netmask", rtsock_fix_netmask(rt_key(rt), rt_mask(rt),
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&ss));
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if (rt->rt_ifp != NULL && (rt->rt_ifp->if_flags & IFF_DYING) == 0) {
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rt_dumpaddr_ddb("ifp", rt->rt_ifp->if_addr->ifa_addr);
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rt_dumpaddr_ddb("ifa", rt->rt_ifa->ifa_addr);
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}
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db_printf("flags ");
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flags = rt->rt_flags;
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if (flags == 0)
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db_printf("none");
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while ((idx = ffs(flags)) > 0) {
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idx--;
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if (flags != rt->rt_flags)
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db_printf(",");
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db_printf("%s", rt_flag_name(idx));
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flags &= ~(1ul << idx);
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}
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db_printf("\n");
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return (0);
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}
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DB_SHOW_COMMAND(routetable, db_show_routetable_cmd)
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{
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struct rib_head *rnh;
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int error, i, lim;
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if (have_addr)
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i = lim = addr;
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else {
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i = 1;
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lim = AF_MAX;
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}
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for (; i <= lim; i++) {
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rnh = rt_tables_get_rnh(0, i);
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if (rnh == NULL) {
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if (have_addr) {
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db_printf("%s: AF %d not supported?\n",
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__func__, i);
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break;
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}
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continue;
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}
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if (!have_addr && i > 1)
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db_printf("\n");
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db_printf("Route table for AF %d%s%s%s:\n", i,
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(i == AF_INET || i == AF_INET6) ? " (" : "",
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(i == AF_INET) ? "INET" : (i == AF_INET6) ? "INET6" : "",
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(i == AF_INET || i == AF_INET6) ? ")" : "");
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error = rnh->rnh_walktree(&rnh->head, rt_dumpentry_ddb, NULL);
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if (error != 0)
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db_printf("%s: walktree(%d): %d\n", __func__, i,
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error);
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}
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}
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_DB_FUNC(_show, route, db_show_route_cmd, db_show_table, CS_OWN, NULL)
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{
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char buf[INET6_ADDRSTRLEN], *bp;
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const void *dst_addrp;
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struct sockaddr *dstp;
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struct rtentry *rt;
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union {
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struct sockaddr_in dest_sin;
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struct sockaddr_in6 dest_sin6;
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} u;
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uint16_t hextets[8];
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unsigned i, tets;
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int t, af, exp, tokflags;
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/*
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* Undecoded address family. No double-colon expansion seen yet.
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*/
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af = -1;
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exp = -1;
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/* Assume INET6 to start; we can work back if guess was wrong. */
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tokflags = DRT_WSPACE | DRT_HEX | DRT_HEXADECIMAL;
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/*
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* db_command has lexed 'show route' for us.
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*/
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t = db_read_token_flags(tokflags);
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if (t == tWSPACE)
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t = db_read_token_flags(tokflags);
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/*
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* tEOL: Just 'show route' isn't a valid mode.
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* tMINUS: It's either '-h' or some invalid option. Regardless, usage.
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*/
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if (t == tEOL || t == tMINUS)
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goto usage;
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db_unread_token(t);
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tets = nitems(hextets);
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/*
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* Each loop iteration, we expect to read one octet (v4) or hextet
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* (v6), followed by an appropriate field separator ('.' or ':' or
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* '::').
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*
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* At the start of each loop, we're looking for a number (octet or
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* hextet).
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*
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* INET6 addresses have a special case where they may begin with '::'.
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*/
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for (i = 0; i < tets; i++) {
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t = db_read_token_flags(tokflags);
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if (t == tCOLONCOLON) {
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/* INET6 with leading '::' or invalid. */
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if (i != 0) {
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db_printf("Parse error: unexpected extra "
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"colons.\n");
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goto exit;
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}
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af = AF_INET6;
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exp = i;
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hextets[i] = 0;
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continue;
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} else if (t == tNUMBER) {
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/*
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* Lexer separates out '-' as tMINUS, but make the
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* assumption explicit here.
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*/
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MPASS(db_tok_number >= 0);
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if (af == AF_INET && db_tok_number > UINT8_MAX) {
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db_printf("Not a valid v4 octet: %ld\n",
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(long)db_tok_number);
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goto exit;
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}
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hextets[i] = db_tok_number;
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} else if (t == tEOL) {
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/*
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* We can only detect the end of an IPv6 address in
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* compact representation with EOL.
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*/
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if (af != AF_INET6 || exp < 0) {
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db_printf("Parse failed. Got unexpected EOF "
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"when the address is not a compact-"
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"representation IPv6 address.\n");
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goto exit;
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}
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break;
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} else {
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db_printf("Parse failed. Unexpected token %d.\n", t);
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goto exit;
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}
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/* Next, look for a separator, if appropriate. */
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if (i == tets - 1)
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continue;
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t = db_read_token_flags(tokflags);
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if (af < 0) {
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if (t == tCOLON) {
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af = AF_INET6;
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continue;
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}
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if (t == tCOLONCOLON) {
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af = AF_INET6;
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i++;
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hextets[i] = 0;
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exp = i;
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continue;
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}
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if (t == tDOT) {
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unsigned hn, dn;
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af = AF_INET;
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/* Need to fixup the first parsed number. */
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if (hextets[0] > 0x255 ||
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(hextets[0] & 0xf0) > 0x90 ||
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(hextets[0] & 0xf) > 9) {
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db_printf("Not a valid v4 octet: %x\n",
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hextets[0]);
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goto exit;
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}
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hn = hextets[0];
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dn = (hn >> 8) * 100 +
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((hn >> 4) & 0xf) * 10 +
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(hn & 0xf);
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hextets[0] = dn;
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/* Switch to decimal for remaining octets. */
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tokflags &= ~DRT_RADIX_MASK;
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tokflags |= DRT_DECIMAL;
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tets = 4;
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continue;
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}
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db_printf("Parse error. Unexpected token %d.\n", t);
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goto exit;
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} else if (af == AF_INET) {
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if (t == tDOT)
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continue;
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db_printf("Expected '.' (%d) between octets but got "
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"(%d).\n", tDOT, t);
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goto exit;
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} else if (af == AF_INET6) {
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if (t == tCOLON)
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continue;
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if (t == tCOLONCOLON) {
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if (exp < 0) {
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i++;
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hextets[i] = 0;
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exp = i;
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continue;
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}
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db_printf("Got bogus second '::' in v6 "
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"address.\n");
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goto exit;
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}
|
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if (t == tEOL) {
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/*
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* Handle in the earlier part of the loop
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* because we need to handle trailing :: too.
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*/
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db_unread_token(t);
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continue;
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}
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db_printf("Expected ':' (%d) or '::' (%d) between "
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"hextets but got (%d).\n", tCOLON, tCOLONCOLON, t);
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goto exit;
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}
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}
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|
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/* Check for trailing garbage. */
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if (i == tets) {
|
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t = db_read_token_flags(tokflags);
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if (t != tEOL) {
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db_printf("Got unexpected garbage after address "
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"(%d).\n", t);
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goto exit;
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}
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}
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|
||||
/*
|
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* Need to expand compact INET6 addresses.
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*
|
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* Technically '::' for a single ':0:' is MUST NOT but just in case,
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* don't bother expanding that form (exp >= 0 && i == tets case).
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*/
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if (af == AF_INET6 && exp >= 0 && i < tets) {
|
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if (exp + 1 < i) {
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memmove(&hextets[exp + 1 + (nitems(hextets) - i)],
|
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&hextets[exp + 1],
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(i - (exp + 1)) * sizeof(hextets[0]));
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}
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memset(&hextets[exp + 1], 0, (nitems(hextets) - i) *
|
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sizeof(hextets[0]));
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}
|
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memset(&u, 0, sizeof(u));
|
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if (af == AF_INET) {
|
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u.dest_sin.sin_family = AF_INET;
|
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u.dest_sin.sin_len = sizeof(u.dest_sin);
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u.dest_sin.sin_addr.s_addr = htonl(
|
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((uint32_t)hextets[0] << 24) |
|
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((uint32_t)hextets[1] << 16) |
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((uint32_t)hextets[2] << 8) |
|
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(uint32_t)hextets[3]);
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dstp = (void *)&u.dest_sin;
|
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dst_addrp = &u.dest_sin.sin_addr;
|
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} else if (af == AF_INET6) {
|
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u.dest_sin6.sin6_family = AF_INET6;
|
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u.dest_sin6.sin6_len = sizeof(u.dest_sin6);
|
||||
for (i = 0; i < nitems(hextets); i++)
|
||||
u.dest_sin6.sin6_addr.s6_addr16[i] = htons(hextets[i]);
|
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dstp = (void *)&u.dest_sin6;
|
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dst_addrp = &u.dest_sin6.sin6_addr;
|
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} else {
|
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MPASS(false);
|
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/* UNREACHABLE */
|
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/* Appease Clang false positive: */
|
||||
dstp = NULL;
|
||||
}
|
||||
|
||||
bp = inet_ntop(af, dst_addrp, buf, sizeof(buf));
|
||||
if (bp != NULL)
|
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db_printf("Looking up route to destination '%s'\n", bp);
|
||||
|
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CURVNET_SET(vnet0);
|
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rt = rtalloc1(dstp, 0, RTF_RNH_LOCKED);
|
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CURVNET_RESTORE();
|
||||
|
||||
if (rt == NULL) {
|
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db_printf("Could not get route for that server.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
rt_dumpentry_ddb((void *)rt, NULL);
|
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RTFREE_LOCKED(rt);
|
||||
|
||||
return;
|
||||
usage:
|
||||
db_printf("Usage: 'show route <address>'\n"
|
||||
" Currently accepts only dotted-decimal INET or colon-separated\n"
|
||||
" hextet INET6 addresses.\n");
|
||||
exit:
|
||||
db_skip_to_eol();
|
||||
}
|
||||
|
||||
418
sys/net/rtsock.c
418
sys/net/rtsock.c
@ -54,11 +54,6 @@
|
||||
#include <sys/sysctl.h>
|
||||
#include <sys/systm.h>
|
||||
|
||||
#ifdef DDB
|
||||
#include <ddb/ddb.h>
|
||||
#include <ddb/db_lex.h>
|
||||
#endif
|
||||
|
||||
#include <net/if.h>
|
||||
#include <net/if_var.h>
|
||||
#include <net/if_dl.h>
|
||||
@ -68,6 +63,9 @@
|
||||
#include <net/raw_cb.h>
|
||||
#include <net/route.h>
|
||||
#include <net/route/route_var.h>
|
||||
#ifdef RADIX_MPATH
|
||||
#include <net/radix_mpath.h>
|
||||
#endif
|
||||
#include <net/vnet.h>
|
||||
|
||||
#include <netinet/in.h>
|
||||
@ -182,8 +180,6 @@ static int sysctl_ifmalist(int af, struct walkarg *w);
|
||||
static int route_output(struct mbuf *m, struct socket *so, ...);
|
||||
static void rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out);
|
||||
static void rt_dispatch(struct mbuf *, sa_family_t);
|
||||
static struct sockaddr *rtsock_fix_netmask(struct sockaddr *dst,
|
||||
struct sockaddr *smask, struct sockaddr_storage *dmask);
|
||||
static int handle_rtm_get(struct rt_addrinfo *info, u_int fibnum,
|
||||
struct rt_msghdr *rtm, struct rtentry **ret_nrt);
|
||||
static int update_rtm_from_rte(struct rt_addrinfo *info,
|
||||
@ -1136,8 +1132,8 @@ rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
|
||||
* Fill in @dmask with valid netmask leaving original @smask
|
||||
* intact. Mostly used with radix netmasks.
|
||||
*/
|
||||
static struct sockaddr *
|
||||
rtsock_fix_netmask(struct sockaddr *dst, struct sockaddr *smask,
|
||||
struct sockaddr *
|
||||
rtsock_fix_netmask(const struct sockaddr *dst, const struct sockaddr *smask,
|
||||
struct sockaddr_storage *dmask)
|
||||
{
|
||||
if (dst == NULL || smask == NULL)
|
||||
@ -2164,407 +2160,3 @@ static struct domain routedomain = {
|
||||
|
||||
VNET_DOMAIN_SET(route);
|
||||
|
||||
#ifdef DDB
|
||||
/*
|
||||
* 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;
|
||||
int flags, idx;
|
||||
|
||||
/* If RNTORT is important, put it in a header. */
|
||||
rt = (void *)rn;
|
||||
|
||||
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 (rt->rt_ifp != NULL && (rt->rt_ifp->if_flags & IFF_DYING) == 0) {
|
||||
rt_dumpaddr_ddb("ifp", rt->rt_ifp->if_addr->ifa_addr);
|
||||
rt_dumpaddr_ddb("ifa", rt->rt_ifa->ifa_addr);
|
||||
}
|
||||
|
||||
db_printf("flags ");
|
||||
flags = rt->rt_flags;
|
||||
if (flags == 0)
|
||||
db_printf("none");
|
||||
|
||||
while ((idx = ffs(flags)) > 0) {
|
||||
idx--;
|
||||
|
||||
if (flags != rt->rt_flags)
|
||||
db_printf(",");
|
||||
db_printf("%s", rt_flag_name(idx));
|
||||
|
||||
flags &= ~(1ul << idx);
|
||||
}
|
||||
|
||||
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_FUNC(_show, route, db_show_route_cmd, db_show_table, CS_OWN, NULL)
|
||||
{
|
||||
char buf[INET6_ADDRSTRLEN], *bp;
|
||||
const void *dst_addrp;
|
||||
struct sockaddr *dstp;
|
||||
struct rtentry *rt;
|
||||
union {
|
||||
struct sockaddr_in dest_sin;
|
||||
struct sockaddr_in6 dest_sin6;
|
||||
} u;
|
||||
uint16_t hextets[8];
|
||||
unsigned i, tets;
|
||||
int t, af, exp, tokflags;
|
||||
|
||||
/*
|
||||
* Undecoded address family. No double-colon expansion seen yet.
|
||||
*/
|
||||
af = -1;
|
||||
exp = -1;
|
||||
/* Assume INET6 to start; we can work back if guess was wrong. */
|
||||
tokflags = DRT_WSPACE | DRT_HEX | DRT_HEXADECIMAL;
|
||||
|
||||
/*
|
||||
* db_command has lexed 'show route' for us.
|
||||
*/
|
||||
t = db_read_token_flags(tokflags);
|
||||
if (t == tWSPACE)
|
||||
t = db_read_token_flags(tokflags);
|
||||
|
||||
/*
|
||||
* tEOL: Just 'show route' isn't a valid mode.
|
||||
* tMINUS: It's either '-h' or some invalid option. Regardless, usage.
|
||||
*/
|
||||
if (t == tEOL || t == tMINUS)
|
||||
goto usage;
|
||||
|
||||
db_unread_token(t);
|
||||
|
||||
tets = nitems(hextets);
|
||||
|
||||
/*
|
||||
* Each loop iteration, we expect to read one octet (v4) or hextet
|
||||
* (v6), followed by an appropriate field separator ('.' or ':' or
|
||||
* '::').
|
||||
*
|
||||
* At the start of each loop, we're looking for a number (octet or
|
||||
* hextet).
|
||||
*
|
||||
* INET6 addresses have a special case where they may begin with '::'.
|
||||
*/
|
||||
for (i = 0; i < tets; i++) {
|
||||
t = db_read_token_flags(tokflags);
|
||||
|
||||
if (t == tCOLONCOLON) {
|
||||
/* INET6 with leading '::' or invalid. */
|
||||
if (i != 0) {
|
||||
db_printf("Parse error: unexpected extra "
|
||||
"colons.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
af = AF_INET6;
|
||||
exp = i;
|
||||
hextets[i] = 0;
|
||||
continue;
|
||||
} else if (t == tNUMBER) {
|
||||
/*
|
||||
* Lexer separates out '-' as tMINUS, but make the
|
||||
* assumption explicit here.
|
||||
*/
|
||||
MPASS(db_tok_number >= 0);
|
||||
|
||||
if (af == AF_INET && db_tok_number > UINT8_MAX) {
|
||||
db_printf("Not a valid v4 octet: %ld\n",
|
||||
(long)db_tok_number);
|
||||
goto exit;
|
||||
}
|
||||
hextets[i] = db_tok_number;
|
||||
} else if (t == tEOL) {
|
||||
/*
|
||||
* We can only detect the end of an IPv6 address in
|
||||
* compact representation with EOL.
|
||||
*/
|
||||
if (af != AF_INET6 || exp < 0) {
|
||||
db_printf("Parse failed. Got unexpected EOF "
|
||||
"when the address is not a compact-"
|
||||
"representation IPv6 address.\n");
|
||||
goto exit;
|
||||
}
|
||||
break;
|
||||
} else {
|
||||
db_printf("Parse failed. Unexpected token %d.\n", t);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* Next, look for a separator, if appropriate. */
|
||||
if (i == tets - 1)
|
||||
continue;
|
||||
|
||||
t = db_read_token_flags(tokflags);
|
||||
if (af < 0) {
|
||||
if (t == tCOLON) {
|
||||
af = AF_INET6;
|
||||
continue;
|
||||
}
|
||||
if (t == tCOLONCOLON) {
|
||||
af = AF_INET6;
|
||||
i++;
|
||||
hextets[i] = 0;
|
||||
exp = i;
|
||||
continue;
|
||||
}
|
||||
if (t == tDOT) {
|
||||
unsigned hn, dn;
|
||||
|
||||
af = AF_INET;
|
||||
/* Need to fixup the first parsed number. */
|
||||
if (hextets[0] > 0x255 ||
|
||||
(hextets[0] & 0xf0) > 0x90 ||
|
||||
(hextets[0] & 0xf) > 9) {
|
||||
db_printf("Not a valid v4 octet: %x\n",
|
||||
hextets[0]);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
hn = hextets[0];
|
||||
dn = (hn >> 8) * 100 +
|
||||
((hn >> 4) & 0xf) * 10 +
|
||||
(hn & 0xf);
|
||||
|
||||
hextets[0] = dn;
|
||||
|
||||
/* Switch to decimal for remaining octets. */
|
||||
tokflags &= ~DRT_RADIX_MASK;
|
||||
tokflags |= DRT_DECIMAL;
|
||||
|
||||
tets = 4;
|
||||
continue;
|
||||
}
|
||||
|
||||
db_printf("Parse error. Unexpected token %d.\n", t);
|
||||
goto exit;
|
||||
} else if (af == AF_INET) {
|
||||
if (t == tDOT)
|
||||
continue;
|
||||
db_printf("Expected '.' (%d) between octets but got "
|
||||
"(%d).\n", tDOT, t);
|
||||
goto exit;
|
||||
|
||||
} else if (af == AF_INET6) {
|
||||
if (t == tCOLON)
|
||||
continue;
|
||||
if (t == tCOLONCOLON) {
|
||||
if (exp < 0) {
|
||||
i++;
|
||||
hextets[i] = 0;
|
||||
exp = i;
|
||||
continue;
|
||||
}
|
||||
db_printf("Got bogus second '::' in v6 "
|
||||
"address.\n");
|
||||
goto exit;
|
||||
}
|
||||
if (t == tEOL) {
|
||||
/*
|
||||
* Handle in the earlier part of the loop
|
||||
* because we need to handle trailing :: too.
|
||||
*/
|
||||
db_unread_token(t);
|
||||
continue;
|
||||
}
|
||||
|
||||
db_printf("Expected ':' (%d) or '::' (%d) between "
|
||||
"hextets but got (%d).\n", tCOLON, tCOLONCOLON, t);
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check for trailing garbage. */
|
||||
if (i == tets) {
|
||||
t = db_read_token_flags(tokflags);
|
||||
if (t != tEOL) {
|
||||
db_printf("Got unexpected garbage after address "
|
||||
"(%d).\n", t);
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Need to expand compact INET6 addresses.
|
||||
*
|
||||
* Technically '::' for a single ':0:' is MUST NOT but just in case,
|
||||
* don't bother expanding that form (exp >= 0 && i == tets case).
|
||||
*/
|
||||
if (af == AF_INET6 && exp >= 0 && i < tets) {
|
||||
if (exp + 1 < i) {
|
||||
memmove(&hextets[exp + 1 + (nitems(hextets) - i)],
|
||||
&hextets[exp + 1],
|
||||
(i - (exp + 1)) * sizeof(hextets[0]));
|
||||
}
|
||||
memset(&hextets[exp + 1], 0, (nitems(hextets) - i) *
|
||||
sizeof(hextets[0]));
|
||||
}
|
||||
|
||||
memset(&u, 0, sizeof(u));
|
||||
if (af == AF_INET) {
|
||||
u.dest_sin.sin_family = AF_INET;
|
||||
u.dest_sin.sin_len = sizeof(u.dest_sin);
|
||||
u.dest_sin.sin_addr.s_addr = htonl(
|
||||
((uint32_t)hextets[0] << 24) |
|
||||
((uint32_t)hextets[1] << 16) |
|
||||
((uint32_t)hextets[2] << 8) |
|
||||
(uint32_t)hextets[3]);
|
||||
dstp = (void *)&u.dest_sin;
|
||||
dst_addrp = &u.dest_sin.sin_addr;
|
||||
} else if (af == AF_INET6) {
|
||||
u.dest_sin6.sin6_family = AF_INET6;
|
||||
u.dest_sin6.sin6_len = sizeof(u.dest_sin6);
|
||||
for (i = 0; i < nitems(hextets); i++)
|
||||
u.dest_sin6.sin6_addr.s6_addr16[i] = htons(hextets[i]);
|
||||
dstp = (void *)&u.dest_sin6;
|
||||
dst_addrp = &u.dest_sin6.sin6_addr;
|
||||
} else {
|
||||
MPASS(false);
|
||||
/* UNREACHABLE */
|
||||
/* Appease Clang false positive: */
|
||||
dstp = NULL;
|
||||
}
|
||||
|
||||
bp = inet_ntop(af, dst_addrp, buf, sizeof(buf));
|
||||
if (bp != NULL)
|
||||
db_printf("Looking up route to destination '%s'\n", bp);
|
||||
|
||||
CURVNET_SET(vnet0);
|
||||
rt = rtalloc1(dstp, 0, RTF_RNH_LOCKED);
|
||||
CURVNET_RESTORE();
|
||||
|
||||
if (rt == NULL) {
|
||||
db_printf("Could not get route for that server.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
rt_dumpentry_ddb((void *)rt, NULL);
|
||||
RTFREE_LOCKED(rt);
|
||||
|
||||
return;
|
||||
usage:
|
||||
db_printf("Usage: 'show route <address>'\n"
|
||||
" Currently accepts only dotted-decimal INET or colon-separated\n"
|
||||
" hextet INET6 addresses.\n");
|
||||
exit:
|
||||
db_skip_to_eol();
|
||||
}
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user