OpenBSD-4.6/sbin/route/route.c
/* $OpenBSD: route.c,v 1.135 2009/06/27 11:35:57 michele Exp $ */
/* $NetBSD: route.c,v 1.16 1996/04/15 18:27:05 cgd Exp $ */
/*
* Copyright (c) 1983, 1989, 1991, 1993
* The Regents of the University of California. 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.
* 3. 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.
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <err.h>
#include <net/if_media.h>
#include <netmpls/mpls.h>
#include "keywords.h"
#include "show.h"
const int ifm_status_valid_list[] = IFM_STATUS_VALID_LIST;
const struct ifmedia_status_description
ifm_status_descriptions[] = IFM_STATUS_DESCRIPTIONS;
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr_dl sdl;
struct sockaddr_rtlabel rtlabel;
struct sockaddr_mpls smpls;
} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_label, so_src;
typedef union sockunion *sup;
pid_t pid;
int rtm_addrs, s;
int forcehost, forcenet, Fflag, nflag, af, qflag, tflag;
int iflag, verbose, aflen = sizeof(struct sockaddr_in);
int locking, lockrest, debugonly;
u_long mpls_flags = MPLS_OP_LOCAL;
u_long rtm_inits;
uid_t uid;
u_int tableid = 0;
struct rt_metrics rt_metrics;
void flushroutes(int, char **);
int newroute(int, char **);
void show(int, char *[]);
int keyword(char *);
void monitor(int, char *[]);
int prefixlen(char *);
void sockaddr(char *, struct sockaddr *);
void sodump(sup, char *);
char *priorityname(u_int8_t);
void print_getmsg(struct rt_msghdr *, int);
void print_rtmsg(struct rt_msghdr *, int);
void pmsg_common(struct rt_msghdr *);
void pmsg_addrs(char *, int);
void bprintf(FILE *, int, char *);
void mask_addr(union sockunion *, union sockunion *, int);
int inet6_makenetandmask(struct sockaddr_in6 *);
int getaddr(int, char *, struct hostent **);
void getmplslabel(char *, int);
int rtmsg(int, int, int, u_char);
__dead void usage(char *);
void set_metric(char *, int);
void inet_makenetandmask(u_int32_t, struct sockaddr_in *, int);
void interfaces(void);
void getlabel(char *);
void gettable(const char *);
__dead void
usage(char *cp)
{
extern char *__progname;
if (cp)
warnx("botched keyword: %s", cp);
fprintf(stderr,
"usage: %s [-dnqtv] [-T tableid] command [[modifiers] args]\n",
__progname);
fprintf(stderr,
"commands: add, change, delete, flush, get, monitor, show\n");
exit(1);
}
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
int
main(int argc, char **argv)
{
int ch;
int rval = 0;
if (argc < 2)
usage(NULL);
while ((ch = getopt(argc, argv, "dnqtT:v")) != -1)
switch (ch) {
case 'n':
nflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'v':
verbose = 1;
break;
case 't':
tflag = 1;
break;
case 'T':
gettable(optarg);
break;
case 'd':
debugonly = 1;
break;
default:
usage(NULL);
/* NOTREACHED */
}
argc -= optind;
argv += optind;
pid = getpid();
uid = geteuid();
if (*argv == NULL)
usage(NULL);
if (keyword(*argv) == K_MONITOR)
monitor(argc, argv);
if (tflag)
s = open(_PATH_DEVNULL, O_WRONLY);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s == -1)
err(1, "socket");
switch (keyword(*argv)) {
case K_GET:
uid = 0;
/* FALLTHROUGH */
case K_CHANGE:
case K_ADD:
case K_DELETE:
rval = newroute(argc, argv);
break;
case K_SHOW:
uid = 0;
show(argc, argv);
break;
case K_MONITOR:
/* handled above */
break;
case K_FLUSH:
flushroutes(argc, argv);
break;
default:
usage(*argv);
/* NOTREACHED */
}
exit(rval);
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
void
flushroutes(int argc, char **argv)
{
const char *errstr;
size_t needed;
int mib[7], rlen, seqno;
char *buf = NULL, *next, *lim = NULL;
struct rt_msghdr *rtm;
struct sockaddr *sa;
u_char prio = 0;
unsigned int ifindex = 0;
if (uid)
errx(1, "must be root to alter routing table");
shutdown(s, 0); /* Don't want to read back our messages */
while (--argc > 0) {
if (**(++argv) == '-')
switch (keyword(*argv + 1)) {
case K_INET:
af = AF_INET;
break;
case K_INET6:
af = AF_INET6;
break;
case K_LINK:
af = AF_LINK;
break;
case K_MPLS:
af = AF_MPLS;
break;
case K_IFACE:
case K_INTERFACE:
if (!--argc)
usage(1+*argv);
ifindex = if_nametoindex(*++argv);
if (ifindex == 0)
errx(1, "no such interface %s", *argv);
break;
case K_PRIORITY:
if (!--argc)
usage(1+*argv);
prio = strtonum(*++argv, 0, RTP_MAX, &errstr);
if (errstr)
errx(1, "priority is %s: %s", errstr,
*argv);
break;
default:
usage(*argv);
/* NOTREACHED */
}
else
usage(*argv);
}
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_DUMP;
mib[5] = 0; /* no flags */
mib[6] = tableid;
if (sysctl(mib, 7, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if (needed) {
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, 7, buf, &needed, NULL, 0) < 0)
err(1, "actual retrieval of routing table");
lim = buf + needed;
}
if (verbose) {
printf("Examining routing table from sysctl\n");
if (af)
printf("(address family %s)\n", (*argv + 1));
}
if (buf == NULL)
return;
seqno = 0;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION)
continue;
if (verbose)
print_rtmsg(rtm, rtm->rtm_msglen);
if ((rtm->rtm_flags & (RTF_GATEWAY|RTF_STATIC|RTF_LLINFO)) == 0)
continue;
sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
if (af && sa->sa_family != af)
continue;
if (ifindex && rtm->rtm_index != ifindex)
continue;
if (prio && rtm->rtm_priority != prio)
continue;
if (sa->sa_family == AF_KEY)
continue; /* Don't flush SPD */
if (debugonly)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
rtm->rtm_tableid = tableid;
rlen = write(s, next, rtm->rtm_msglen);
if (rlen < (int)rtm->rtm_msglen) {
warn("write to routing socket");
printf("got only %d for rlen\n", rlen);
break;
}
seqno++;
if (qflag)
continue;
if (verbose)
print_rtmsg(rtm, rlen);
else {
struct sockaddr *sa = (struct sockaddr *)(next +
rtm->rtm_hdrlen);
printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
routename(sa) : netname(sa, NULL)); /* XXX extract
netmask */
sa = (struct sockaddr *)
(ROUNDUP(sa->sa_len) + (char *)sa);
printf("%-20.20s ", routename(sa));
printf("done\n");
}
}
free(buf);
}
void
set_metric(char *value, int key)
{
int flag = 0;
u_int noval, *valp = &noval;
switch (key) {
case K_MTU:
valp = &rt_metrics.rmx_mtu;
flag = RTV_MTU;
break;
case K_EXPIRE:
valp = &rt_metrics.rmx_expire;
flag = RTV_EXPIRE;
break;
case K_HOPCOUNT:
case K_RECVPIPE:
case K_SENDPIPE:
case K_SSTHRESH:
case K_RTT:
case K_RTTVAR:
/* no longer used, only for compatibility */
return;
default:
errx(1, "king bula sez: set_metric with invalid key");
}
rtm_inits |= flag;
if (lockrest || locking)
rt_metrics.rmx_locks |= flag;
if (locking)
locking = 0;
*valp = atoi(value);
}
int
newroute(int argc, char **argv)
{
const char *errstr;
char *cmd, *dest = "", *gateway = "", *error;
int ishost = 0, ret = 0, attempts, oerrno, flags = RTF_STATIC;
int fmask = 0;
int key;
u_char prio = 0;
struct hostent *hp = NULL;
if (uid)
errx(1, "must be root to alter routing table");
cmd = argv[0];
if (*cmd != 'g')
shutdown(s, 0); /* Don't want to read back our messages */
while (--argc > 0) {
if (**(++argv)== '-') {
switch (key = keyword(1 + *argv)) {
case K_LINK:
af = AF_LINK;
aflen = sizeof(struct sockaddr_dl);
break;
case K_INET:
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
break;
case K_INET6:
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
break;
case K_SA:
af = PF_ROUTE;
aflen = sizeof(union sockunion);
break;
case K_MPLS:
af = AF_MPLS;
aflen = sizeof(struct sockaddr_mpls);
break;
case K_MPLSLABEL:
if (!--argc)
usage(1+*argv);
if (af != AF_INET && af != AF_INET6)
errx(1, "-mplslabel requires "
"-inet or -inet6");
getmplslabel(*++argv, 0);
mpls_flags = MPLS_OP_PUSH;
break;
case K_IN:
if (!--argc)
usage(1+*argv);
if (af != AF_MPLS)
errx(1, "-in requires -mpls");
getmplslabel(*++argv, 1);
break;
case K_OUT:
if (!--argc)
usage(1+*argv);
if (af != AF_MPLS)
errx(1, "-out requires -mpls");
if (mpls_flags == MPLS_OP_LOCAL)
errx(1, "-out requires -push, -pop, "
"-swap");
getmplslabel(*++argv, 0);
break;
case K_POP:
if (af != AF_MPLS)
errx(1, "-pop requires -mpls");
mpls_flags = MPLS_OP_POP;
break;
case K_PUSH:
if (af != AF_MPLS)
errx(1, "-push requires -mpls");
mpls_flags = MPLS_OP_PUSH;
break;
case K_SWAP:
if (af != AF_MPLS)
errx(1, "-swap requires -mpls");
mpls_flags = MPLS_OP_SWAP;
break;
case K_IFACE:
case K_INTERFACE:
iflag++;
break;
case K_NOSTATIC:
flags &= ~RTF_STATIC;
break;
case K_LLINFO:
flags |= RTF_LLINFO;
break;
case K_LOCK:
locking = 1;
break;
case K_LOCKREST:
lockrest = 1;
break;
case K_HOST:
forcehost++;
break;
case K_REJECT:
flags |= RTF_REJECT;
break;
case K_BLACKHOLE:
flags |= RTF_BLACKHOLE;
break;
case K_PROTO1:
flags |= RTF_PROTO1;
break;
case K_PROTO2:
flags |= RTF_PROTO2;
break;
case K_CLONING:
flags |= RTF_CLONING;
break;
case K_XRESOLVE:
flags |= RTF_XRESOLVE;
break;
case K_STATIC:
flags |= RTF_STATIC;
break;
case K_IFA:
if (!--argc)
usage(1+*argv);
getaddr(RTA_IFA, *++argv, NULL);
break;
case K_IFP:
if (!--argc)
usage(1+*argv);
getaddr(RTA_IFP, *++argv, NULL);
break;
case K_GENMASK:
if (!--argc)
usage(1+*argv);
getaddr(RTA_GENMASK, *++argv, NULL);
break;
case K_GATEWAY:
if (!--argc)
usage(1+*argv);
getaddr(RTA_GATEWAY, *++argv, NULL);
gateway = *argv;
break;
case K_DST:
if (!--argc)
usage(1+*argv);
ishost = getaddr(RTA_DST, *++argv, &hp);
dest = *argv;
break;
case K_LABEL:
if (!--argc)
usage(1+*argv);
getlabel(*++argv);
break;
case K_NETMASK:
if (!--argc)
usage(1+*argv);
getaddr(RTA_NETMASK, *++argv, NULL);
/* FALLTHROUGH */
case K_NET:
forcenet++;
break;
case K_PREFIXLEN:
if (!--argc)
usage(1+*argv);
ishost = prefixlen(*++argv);
break;
case K_MPATH:
flags |= RTF_MPATH;
break;
case K_JUMBO:
flags |= RTF_JUMBO;
fmask |= RTF_JUMBO;
break;
case K_NOJUMBO:
flags &= ~RTF_JUMBO;
fmask |= RTF_JUMBO;
break;
case K_MTU:
case K_HOPCOUNT:
case K_EXPIRE:
case K_RECVPIPE:
case K_SENDPIPE:
case K_SSTHRESH:
case K_RTT:
case K_RTTVAR:
if (!--argc)
usage(1+*argv);
set_metric(*++argv, key);
break;
case K_PRIORITY:
if (!--argc)
usage(1+*argv);
prio = strtonum(*++argv, 0, RTP_MAX, &errstr);
if (errstr)
errx(1, "priority is %s: %s", errstr,
*argv);
break;
default:
usage(1+*argv);
/* NOTREACHED */
}
} else {
if ((rtm_addrs & RTA_DST) == 0) {
dest = *argv;
ishost = getaddr(RTA_DST, *argv, &hp);
} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
gateway = *argv;
getaddr(RTA_GATEWAY, *argv, &hp);
} else {
int hops = atoi(*argv);
if (hops == 0) {
if (!qflag && strcmp(*argv, "0") == 0)
printf("%s,%s",
"old usage of trailing 0",
"assuming route to if\n");
else
usage(NULL);
iflag = 1;
continue;
} else if (hops > 0 && hops < 10) {
if (!qflag) {
printf("old usage of trailing digit, ");
printf("assuming route via gateway\n");
}
iflag = 0;
continue;
}
getaddr(RTA_NETMASK, *argv, NULL);
}
}
}
if (forcehost)
ishost = 1;
if (forcenet)
ishost = 0;
if (forcenet && !(rtm_addrs & RTA_NETMASK))
errx(1, "netmask missing");
flags |= RTF_UP;
if (ishost)
flags |= RTF_HOST;
if (iflag == 0)
flags |= RTF_GATEWAY;
for (attempts = 1; ; attempts++) {
errno = 0;
if ((ret = rtmsg(*cmd, flags, fmask, prio)) == 0)
break;
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
memcpy(&so_gate.sin.sin_addr, hp->h_addr_list[0],
hp->h_length);
} else
break;
}
if (*cmd == 'g')
exit(0);
oerrno = errno;
if (!qflag) {
printf("%s %s %s", cmd, ishost ? "host" : "net", dest);
if (*gateway) {
printf(": gateway %s", gateway);
if (attempts > 1 && ret == 0 && af == AF_INET)
printf(" (%s)", inet_ntoa(so_gate.sin.sin_addr));
}
if (ret == 0)
printf("\n");
if (ret != 0) {
switch (oerrno) {
case ESRCH:
error = "not in table";
break;
case EBUSY:
error = "entry in use";
break;
case ENOBUFS:
error = "routing table overflow";
break;
default:
error = strerror(oerrno);
break;
}
printf(": %s\n", error);
}
}
return (ret != 0);
}
void
show(int argc, char *argv[])
{
int af = 0;
while (--argc > 0) {
if (**(++argv)== '-')
switch (keyword(*argv + 1)) {
case K_INET:
af = AF_INET;
break;
case K_INET6:
af = AF_INET6;
break;
case K_LINK:
af = AF_LINK;
break;
case K_MPLS:
af = AF_MPLS;
break;
case K_ENCAP:
af = PF_KEY;
break;
case K_GATEWAY:
Fflag = 1;
break;
default:
usage(*argv);
/* NOTREACHED */
}
else
usage(*argv);
}
p_rttables(af, tableid);
}
void
inet_makenetandmask(u_int32_t net, struct sockaddr_in *sin, int bits)
{
u_int32_t addr, mask = 0;
char *cp;
rtm_addrs |= RTA_NETMASK;
if (net == 0)
mask = addr = 0;
else if (bits) {
addr = net;
mask = 0xffffffff << (32 - bits);
} else if (net < 128) {
addr = net << IN_CLASSA_NSHIFT;
mask = IN_CLASSA_NET;
} else if (net < 65536) {
addr = net << IN_CLASSB_NSHIFT;
mask = IN_CLASSB_NET;
} else if (net < 16777216L) {
addr = net << IN_CLASSC_NSHIFT;
mask = IN_CLASSC_NET;
} else {
addr = net;
if ((addr & IN_CLASSA_HOST) == 0)
mask = IN_CLASSA_NET;
else if ((addr & IN_CLASSB_HOST) == 0)
mask = IN_CLASSB_NET;
else if ((addr & IN_CLASSC_HOST) == 0)
mask = IN_CLASSC_NET;
else
mask = 0xffffffff;
}
addr &= mask;
sin->sin_addr.s_addr = htonl(addr);
sin = &so_mask.sin;
sin->sin_addr.s_addr = htonl(mask);
sin->sin_len = 0;
sin->sin_family = 0;
cp = (char *)(&sin->sin_addr + 1);
while (*--cp == '\0' && cp > (char *)sin)
;
sin->sin_len = 1 + cp - (char *)sin;
}
/*
* XXX the function may need more improvement...
*/
int
inet6_makenetandmask(struct sockaddr_in6 *sin6)
{
char *plen = NULL;
struct in6_addr in6;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
sin6->sin6_scope_id == 0) {
plen = "0";
} else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
/* aggregatable global unicast - RFC2374 */
memset(&in6, 0, sizeof(in6));
if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8))
plen = "64";
}
if (!plen || strcmp(plen, "128") == 0)
return (1);
else {
rtm_addrs |= RTA_NETMASK;
prefixlen(plen);
return (0);
}
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
int
getaddr(int which, char *s, struct hostent **hpp)
{
sup su = NULL;
struct hostent *hp;
struct netent *np;
int afamily, bits;
if (af == 0) {
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
}
afamily = af; /* local copy of af so we can change it */
rtm_addrs |= which;
switch (which) {
case RTA_DST:
su = &so_dst;
break;
case RTA_GATEWAY:
su = &so_gate;
break;
case RTA_NETMASK:
su = &so_mask;
break;
case RTA_GENMASK:
su = &so_genmask;
break;
case RTA_IFP:
su = &so_ifp;
afamily = AF_LINK;
break;
case RTA_IFA:
su = &so_ifa;
break;
default:
errx(1, "internal error");
/* NOTREACHED */
}
su->sa.sa_len = aflen;
su->sa.sa_family = afamily;
if (strcmp(s, "default") == 0) {
switch (which) {
case RTA_DST:
forcenet++;
getaddr(RTA_NETMASK, s, NULL);
break;
case RTA_NETMASK:
case RTA_GENMASK:
su->sa.sa_len = 0;
}
return (0);
}
switch (afamily) {
case AF_INET6:
{
struct addrinfo hints, *res;
memset(&hints, 0, sizeof(hints));
hints.ai_family = afamily; /*AF_INET6*/
hints.ai_flags = AI_NUMERICHOST;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
if (getaddrinfo(s, "0", &hints, &res) != 0) {
hints.ai_flags = 0;
if (getaddrinfo(s, "0", &hints, &res) != 0)
errx(1, "%s: bad value", s);
}
if (sizeof(su->sin6) != res->ai_addrlen)
errx(1, "%s: bad value", s);
if (res->ai_next)
errx(1, "%s: resolved to multiple values", s);
memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
freeaddrinfo(res);
if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr) ||
IN6_IS_ADDR_MC_INTFACELOCAL(&su->sin6.sin6_addr)) &&
su->sin6.sin6_scope_id) {
*(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
htons(su->sin6.sin6_scope_id);
su->sin6.sin6_scope_id = 0;
}
if (hints.ai_flags == AI_NUMERICHOST) {
if (which == RTA_DST)
return (inet6_makenetandmask(&su->sin6));
return (0);
} else
return (1);
}
case AF_LINK:
link_addr(s, &su->sdl);
return (1);
case AF_MPLS:
errx(1, "mpls labels require -in or -out switch");
case PF_ROUTE:
su->sa.sa_len = sizeof(*su);
sockaddr(s, &su->sa);
return (1);
case AF_INET:
if (hpp != NULL)
*hpp = NULL;
if (which == RTA_DST && !forcehost) {
bits = inet_net_pton(AF_INET, s, &su->sin.sin_addr,
sizeof(su->sin.sin_addr));
if (bits == 32)
return (1);
if (bits >= 0) {
inet_makenetandmask(ntohl(
su->sin.sin_addr.s_addr),
&su->sin, bits);
return (0);
}
np = getnetbyname(s);
if (np != NULL && np->n_net != 0) {
inet_makenetandmask(np->n_net, &su->sin, 0);
return (0);
}
if (forcenet)
errx(1, "%s: not a network", s);
}
if (inet_pton(AF_INET, s, &su->sin.sin_addr) == 1)
return (1);
hp = gethostbyname(s);
if (hp != NULL) {
if (hpp != NULL)
*hpp = hp;
su->sin.sin_addr = *(struct in_addr *)hp->h_addr;
return (1);
}
errx(1, "%s: bad address", s);
/* NOTREACHED */
default:
errx(1, "%d: bad address family", afamily);
/* NOTREACHED */
}
}
void
getmplslabel(char *s, int in)
{
sup su = NULL;
const char *errstr;
u_int32_t label;
label = strtonum(s, 0, 0x000fffff, &errstr);
if (errstr)
errx(1, "bad label: %s is %s", s, errstr);
if (in) {
rtm_addrs |= RTA_DST;
su = &so_dst;
su->smpls.smpls_label = htonl(label << MPLS_LABEL_OFFSET);
} else {
rtm_addrs |= RTA_SRC;
su = &so_src;
su->smpls.smpls_label = htonl(label << MPLS_LABEL_OFFSET);
}
su->sa.sa_len = sizeof(struct sockaddr_mpls);
su->sa.sa_family = AF_MPLS;
}
int
prefixlen(char *s)
{
int len = atoi(s), q, r;
int max;
switch (af) {
case AF_INET:
max = sizeof(struct in_addr) * 8;
break;
case AF_INET6:
max = sizeof(struct in6_addr) * 8;
break;
default:
errx(1, "prefixlen is not supported with af %d", af);
/* NOTREACHED */
}
rtm_addrs |= RTA_NETMASK;
if (len < 0 || len > max)
errx(1, "%s: bad value", s);
q = len >> 3;
r = len & 7;
switch (af) {
case AF_INET:
memset(&so_mask, 0, sizeof(so_mask));
so_mask.sin.sin_family = AF_INET;
so_mask.sin.sin_len = sizeof(struct sockaddr_in);
so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len));
break;
case AF_INET6:
so_mask.sin6.sin6_family = AF_INET6;
so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6);
memset((void *)&so_mask.sin6.sin6_addr, 0,
sizeof(so_mask.sin6.sin6_addr));
if (q > 0)
memset((void *)&so_mask.sin6.sin6_addr, 0xff, q);
if (r > 0)
*((u_char *)&so_mask.sin6.sin6_addr + q) =
(0xff00 >> r) & 0xff;
break;
}
return (len == max);
}
void
interfaces(void)
{
size_t needed;
int mib[6];
char *buf = NULL, *lim, *next;
struct rt_msghdr *rtm;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_IFLIST;
mib[5] = 0; /* no flags */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if (needed) {
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(1, "actual retrieval of interface table");
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
print_rtmsg(rtm, rtm->rtm_msglen);
}
free(buf);
}
}
void
monitor(int argc, char *argv[])
{
int af = 0;
unsigned int filter = 0;
int n;
char msg[2048];
time_t now;
while (--argc > 0) {
if (**(++argv)== '-')
switch (keyword(*argv + 1)) {
case K_INET:
af = AF_INET;
break;
case K_INET6:
af = AF_INET6;
break;
case K_IFACE:
filter = ROUTE_FILTER(RTM_IFINFO) |
ROUTE_FILTER(RTM_IFANNOUNCE);
break;
default:
usage(*argv);
/* NOTREACHED */
}
else
usage(*argv);
}
s = socket(PF_ROUTE, SOCK_RAW, af);
if (s == -1)
err(1, "socket");
if (setsockopt(s, AF_ROUTE, ROUTE_MSGFILTER, &filter,
sizeof(filter)) == -1)
err(1, "setsockopt");
verbose = 1;
if (debugonly) {
interfaces();
exit(0);
}
for (;;) {
if ((n = read(s, msg, sizeof(msg))) == -1) {
if (errno == EINTR)
continue;
err(1, "read");
}
now = time(NULL);
printf("got message of size %d on %s", n, ctime(&now));
print_rtmsg((struct rt_msghdr *)msg, n);
}
}
struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
int
rtmsg(int cmd, int flags, int fmask, u_char prio)
{
static int seq;
char *cp = m_rtmsg.m_space;
int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) { \
l = ROUNDUP(u.sa.sa_len); \
memcpy(cp, &(u), l); \
cp += l; \
if (verbose) \
sodump(&(u), #u); \
}
errno = 0;
memset(&m_rtmsg, 0, sizeof(m_rtmsg));
if (cmd == 'a')
cmd = RTM_ADD;
else if (cmd == 'c')
cmd = RTM_CHANGE;
else if (cmd == 'g') {
cmd = RTM_GET;
if (so_ifp.sa.sa_family == 0) {
so_ifp.sa.sa_family = AF_LINK;
so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
rtm_addrs |= RTA_IFP;
}
} else
cmd = RTM_DELETE;
#define rtm m_rtmsg.m_rtm
rtm.rtm_type = cmd;
rtm.rtm_flags = flags;
rtm.rtm_fmask = fmask;
rtm.rtm_version = RTM_VERSION;
rtm.rtm_seq = ++seq;
rtm.rtm_addrs = rtm_addrs;
rtm.rtm_rmx = rt_metrics;
rtm.rtm_inits = rtm_inits;
rtm.rtm_tableid = tableid;
rtm.rtm_priority = prio;
rtm.rtm_mpls = mpls_flags;
rtm.rtm_hdrlen = sizeof(rtm);
if (rtm_addrs & RTA_NETMASK)
mask_addr(&so_dst, &so_mask, RTA_DST);
NEXTADDR(RTA_DST, so_dst);
NEXTADDR(RTA_GATEWAY, so_gate);
NEXTADDR(RTA_NETMASK, so_mask);
NEXTADDR(RTA_GENMASK, so_genmask);
NEXTADDR(RTA_IFP, so_ifp);
NEXTADDR(RTA_IFA, so_ifa);
NEXTADDR(RTA_LABEL, so_label);
NEXTADDR(RTA_SRC, so_src);
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
if (verbose)
print_rtmsg(&rtm, l);
if (debugonly)
return (0);
if (write(s, &m_rtmsg, l) != l) {
if (qflag == 0)
warn("writing to routing socket");
return (-1);
}
if (cmd == RTM_GET) {
do {
l = read(s, &m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm.rtm_version != RTM_VERSION ||
rtm.rtm_seq != seq || rtm.rtm_pid != pid));
if (l == -1)
warn("read from routing socket");
else
print_getmsg(&rtm, l);
}
#undef rtm
return (0);
}
void
mask_addr(union sockunion *addr, union sockunion *mask, int which)
{
int olen = mask->sa.sa_len;
char *cp1 = olen + (char *)mask, *cp2;
for (mask->sa.sa_len = 0; cp1 > (char *)mask; )
if (*--cp1 != '\0') {
mask->sa.sa_len = 1 + cp1 - (char *)mask;
break;
}
if ((rtm_addrs & which) == 0)
return;
switch (addr->sa.sa_family) {
case AF_INET:
case AF_INET6:
case 0:
return;
}
cp1 = mask->sa.sa_len + 1 + (char *)addr;
cp2 = addr->sa.sa_len + 1 + (char *)addr;
while (cp2 > cp1)
*--cp2 = '\0';
cp2 = mask->sa.sa_len + 1 + (char *)mask;
while (cp1 > addr->sa.sa_data)
*--cp1 &= *--cp2;
}
char *msgtypes[] = {
"",
"RTM_ADD: Add Route",
"RTM_DELETE: Delete Route",
"RTM_CHANGE: Change Metrics or flags",
"RTM_GET: Report Metrics",
"RTM_LOSING: Kernel Suspects Partitioning",
"RTM_REDIRECT: Told to use different route",
"RTM_MISS: Lookup failed on this address",
"RTM_LOCK: fix specified metrics",
"RTM_OLDADD: caused by SIOCADDRT",
"RTM_OLDDEL: caused by SIOCDELRT",
"RTM_RESOLVE: Route created by cloning",
"RTM_NEWADDR: address being added to iface",
"RTM_DELADDR: address being removed from iface",
"RTM_IFINFO: iface status change",
"RTM_IFANNOUNCE: iface arrival/departure",
NULL
};
char metricnames[] =
"\011priority\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu";
char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING"
"\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016PROTO3\017PROTO2\020PROTO1\021CLONED\022SOURCE\023MPATH\024JUMBO\025MPLS";
char ifnetflags[] =
"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC"
"\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST";
char addrnames[] =
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD\013LABEL";
const char *
get_linkstate(int mt, int link_state)
{
const struct ifmedia_status_description *p;
int i, media_type;
switch (mt) {
case IFT_ETHER:
media_type = IFM_ETHER;
break;
case IFT_FDDI:
media_type = IFM_FDDI;
break;
case IFT_CARP:
media_type = IFM_CARP;
break;
case IFT_IEEE80211:
media_type = IFM_IEEE80211;
break;
default:
media_type = 0;
break;
}
if (link_state == LINK_STATE_UNKNOWN)
return ("unknown");
for (i = 0; ifm_status_valid_list[i] != 0; i++) {
for (p = ifm_status_descriptions; p->ifms_valid != 0; p++) {
if (p->ifms_type != media_type ||
p->ifms_valid != ifm_status_valid_list[i])
continue;
if (LINK_STATE_IS_UP(link_state))
return (p->ifms_string[1]);
return (p->ifms_string[0]);
}
}
return ("unknown");
}
void
print_rtmsg(struct rt_msghdr *rtm, int msglen)
{
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
struct if_announcemsghdr *ifan;
char ifname[IF_NAMESIZE];
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
warnx("routing message version %d not understood",
rtm->rtm_version);
return;
}
printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen);
switch (rtm->rtm_type) {
case RTM_IFINFO:
ifm = (struct if_msghdr *)rtm;
(void) printf("if# %d, ", ifm->ifm_index);
if (!nflag && if_indextoname(ifm->ifm_index, ifname) != NULL)
printf("name: %s, ", ifname);
printf("link: %s, flags:",
get_linkstate(ifm->ifm_data.ifi_type,
ifm->ifm_data.ifi_link_state));
bprintf(stdout, ifm->ifm_flags, ifnetflags);
pmsg_addrs((char *)ifm + ifm->ifm_hdrlen, ifm->ifm_addrs);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
ifam = (struct ifa_msghdr *)rtm;
printf("metric %d, flags:", ifam->ifam_metric);
bprintf(stdout, ifam->ifam_flags, routeflags);
pmsg_addrs((char *)ifam + ifam->ifam_hdrlen, ifam->ifam_addrs);
break;
case RTM_IFANNOUNCE:
ifan = (struct if_announcemsghdr *)rtm;
printf("if# %d, name %s, what: ",
ifan->ifan_index, ifan->ifan_name);
switch (ifan->ifan_what) {
case IFAN_ARRIVAL:
printf("arrival");
break;
case IFAN_DEPARTURE:
printf("departure");
break;
default:
printf("#%d", ifan->ifan_what);
break;
}
printf("\n");
break;
default:
printf("priority %d, ", rtm->rtm_priority);
printf("table %u, pid: %ld, seq %d, errno %d\nflags:",
rtm->rtm_tableid, (long)rtm->rtm_pid, rtm->rtm_seq,
rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags, routeflags);
pmsg_common(rtm);
}
}
char *
priorityname(u_int8_t prio)
{
switch (prio) {
case RTP_NONE:
return ("none");
case RTP_CONNECTED:
return ("connected");
case RTP_STATIC:
return ("static");
case RTP_OSPF:
return ("ospf");
case RTP_ISIS:
return ("is-is");
case RTP_RIP:
return ("rip");
case RTP_BGP:
return ("bgp");
case RTP_DEFAULT:
return ("default");
default:
return ("");
}
}
void
print_getmsg(struct rt_msghdr *rtm, int msglen)
{
struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL;
struct sockaddr_dl *ifp = NULL;
struct sockaddr_rtlabel *sa_rl = NULL;
struct sockaddr *sa;
char *cp;
int i;
printf(" route to: %s\n", routename(&so_dst.sa));
if (rtm->rtm_version != RTM_VERSION) {
warnx("routing message version %d not understood",
rtm->rtm_version);
return;
}
if (rtm->rtm_msglen > msglen)
warnx("message length mismatch, in packet %d, returned %d",
rtm->rtm_msglen, msglen);
if (rtm->rtm_errno) {
warnx("RTM_GET: %s (errno %d)",
strerror(rtm->rtm_errno), rtm->rtm_errno);
return;
}
cp = ((char *)rtm + rtm->rtm_hdrlen);
if (rtm->rtm_addrs)
for (i = 1; i; i <<= 1)
if (i & rtm->rtm_addrs) {
sa = (struct sockaddr *)cp;
switch (i) {
case RTA_DST:
dst = sa;
break;
case RTA_GATEWAY:
gate = sa;
break;
case RTA_NETMASK:
mask = sa;
break;
case RTA_IFA:
ifa = sa;
break;
case RTA_IFP:
if (sa->sa_family == AF_LINK &&
((struct sockaddr_dl *)sa)->sdl_nlen)
ifp = (struct sockaddr_dl *)sa;
break;
case RTA_LABEL:
sa_rl = (struct sockaddr_rtlabel *)sa;
break;
}
ADVANCE(cp, sa);
}
if (dst && mask)
mask->sa_family = dst->sa_family; /* XXX */
if (dst)
printf("destination: %s\n", routename(dst));
if (mask) {
int savenflag = nflag;
nflag = 1;
printf(" mask: %s\n", routename(mask));
nflag = savenflag;
}
if (gate && rtm->rtm_flags & RTF_GATEWAY)
printf(" gateway: %s\n", routename(gate));
if (ifp)
printf(" interface: %.*s\n",
ifp->sdl_nlen, ifp->sdl_data);
if (ifa)
printf(" if address: %s\n", routename(ifa));
printf(" priority: %u (%s)\n", rtm->rtm_priority,
priorityname(rtm->rtm_priority));
printf(" flags: ");
bprintf(stdout, rtm->rtm_flags, routeflags);
printf("\n");
if (sa_rl != NULL)
printf(" label: %s\n", sa_rl->sr_label);
#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
#define msec(u) (((u) + 500) / 1000) /* usec to msec */
printf("%s\n", " use mtu expire");
printf("%8llu ", rtm->rtm_rmx.rmx_pksent);
printf("%8u%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
if (rtm->rtm_rmx.rmx_expire)
rtm->rtm_rmx.rmx_expire -= time(NULL);
printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
#undef lock
#undef msec
#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
if (verbose)
pmsg_common(rtm);
else if (rtm->rtm_addrs &~ RTA_IGN) {
printf("sockaddrs: ");
bprintf(stdout, rtm->rtm_addrs, addrnames);
putchar('\n');
}
#undef RTA_IGN
}
void
pmsg_common(struct rt_msghdr *rtm)
{
printf("\nlocks: ");
bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
printf(" inits: ");
bprintf(stdout, rtm->rtm_inits, metricnames);
pmsg_addrs(((char *)rtm + rtm->rtm_hdrlen), rtm->rtm_addrs);
}
void
pmsg_addrs(char *cp, int addrs)
{
struct sockaddr *sa;
int family = AF_UNSPEC;
int i;
char *p;
if (addrs != 0) {
printf("\nsockaddrs: ");
bprintf(stdout, addrs, addrnames);
putchar('\n');
/* first run, search for address family */
p = cp;
for (i = 1; i; i <<= 1)
if (i & addrs) {
sa = (struct sockaddr *)p;
if (family == AF_UNSPEC)
switch (i) {
case RTA_DST:
case RTA_IFA:
family = sa->sa_family;
}
ADVANCE(p, sa);
}
/* second run, set address family for mask and print */
p = cp;
for (i = 1; i; i <<= 1)
if (i & addrs) {
sa = (struct sockaddr *)p;
if (family != AF_UNSPEC)
switch (i) {
case RTA_NETMASK:
case RTA_GENMASK:
sa->sa_family = family;
}
printf(" %s", routename(sa));
ADVANCE(p, sa);
}
}
putchar('\n');
fflush(stdout);
}
void
bprintf(FILE *fp, int b, char *s)
{
int i;
int gotsome = 0;
if (b == 0)
return;
while ((i = *s++)) {
if ((b & (1 << (i-1)))) {
if (gotsome == 0)
i = '<';
else
i = ',';
putc(i, fp);
gotsome = 1;
for (; (i = *s) > 32; s++)
putc(i, fp);
} else
while (*s > 32)
s++;
}
if (gotsome)
putc('>', fp);
}
int
keyword(char *cp)
{
struct keytab *kt = keywords;
while (kt->kt_cp && strcmp(kt->kt_cp, cp))
kt++;
return (kt->kt_i);
}
void
sodump(sup su, char *which)
{
switch (su->sa.sa_family) {
case AF_LINK:
printf("%s: link %s; ", which, link_ntoa(&su->sdl));
break;
case AF_INET:
printf("%s: inet %s; ", which, inet_ntoa(su->sin.sin_addr));
break;
case AF_INET6:
{
char ntop_buf[NI_MAXHOST];
printf("%s: inet6 %s; ",
which, inet_ntop(AF_INET6, &su->sin6.sin6_addr,
ntop_buf, sizeof(ntop_buf)));
break;
}
}
fflush(stdout);
}
/* States*/
#define VIRGIN 0
#define GOTONE 1
#define GOTTWO 2
/* Inputs */
#define DIGIT (4*0)
#define END (4*1)
#define DELIM (4*2)
void
sockaddr(char *addr, struct sockaddr *sa)
{
char *cp = (char *)sa;
int size = sa->sa_len;
char *cplim = cp + size;
int byte = 0, state = VIRGIN, new = 0;
memset(cp, 0, size);
cp++;
do {
if ((*addr >= '0') && (*addr <= '9')) {
new = *addr - '0';
} else if ((*addr >= 'a') && (*addr <= 'f')) {
new = *addr - 'a' + 10;
} else if ((*addr >= 'A') && (*addr <= 'F')) {
new = *addr - 'A' + 10;
} else if (*addr == '\0')
state |= END;
else
state |= DELIM;
addr++;
switch (state /* | INPUT */) {
case GOTTWO | DIGIT:
*cp++ = byte; /*FALLTHROUGH*/
case VIRGIN | DIGIT:
state = GOTONE; byte = new; continue;
case GOTONE | DIGIT:
state = GOTTWO; byte = new + (byte << 4); continue;
default: /* | DELIM */
state = VIRGIN; *cp++ = byte; byte = 0; continue;
case GOTONE | END:
case GOTTWO | END:
*cp++ = byte; /* FALLTHROUGH */
case VIRGIN | END:
break;
}
break;
} while (cp < cplim);
sa->sa_len = cp - (char *)sa;
}
void
getlabel(char *name)
{
so_label.rtlabel.sr_len = sizeof(so_label.rtlabel);
so_label.rtlabel.sr_family = AF_UNSPEC;
if (strlcpy(so_label.rtlabel.sr_label, name,
sizeof(so_label.rtlabel.sr_label)) >=
sizeof(so_label.rtlabel.sr_label))
errx(1, "label too long");
rtm_addrs |= RTA_LABEL;
}
void
gettable(const char *s)
{
const char *errstr;
tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
if (errstr)
errx(1, "invalid table id: %s", errstr);
}