d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
1d36c8992d
freebsd-nq/sbin/route/route.c
Ruslan Ermilov 1d36c8992d When changing an indirect route, kernel routing code allocates 
a route to the gateway and caches it in the route structure.
It may happen (if the routing table is screwed) that the gateway
route is the same route as the one being modified, in which case
a kernel reports EDQUOT.  Be more verbose about this:

# route add -net 10 192.168.4.65
add net 10: gateway 192.168.4.65
# netstat -rn -finet
Routing tables

Internet:
Destination        Gateway            Flags     Refs     Use     Netif Expire
default            192.168.4.65       UGSc        1        7      rl0
10                 192.168.4.65       UGSc        0        0      rl0
127.0.0.1          127.0.0.1          UH          0      178      lo0
192.168.4          link#1             UC          2        0      rl0 =>
192.168.4.65       0:d0:b7:16:9c:c6   UHLW        2        0      rl0   1123

Before:

# route change -net 10 10.0.0.1
route: writing to routing socket: Disc quota exceeded
change net 10: gateway 10.0.0.1: Disc quota exceeded

After:

# ./route change -net 10 10.0.0.1
route: writing to routing socket: Disc quota exceeded
change net 10: gateway 10.0.0.1: gateway uses the same route

PR:		bin/1093, misc/26833
2001-06-08 12:44:25 +00:00

1669 lines
37 KiB
C
Raw Blame History

/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)route.c 8.3 (Berkeley) 3/19/94";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netatalk/at.h>
#ifdef NS
#include <netns/ns.h>
#endif
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
/* wrapper for KAME-special getnameinfo() */
#ifndef NI_WITHSCOPEID
#define NI_WITHSCOPEID 0
#endif
struct keytab {
char *kt_cp;
int kt_i;
} keywords[] = {
#include "keywords.h"
{0, 0}
};
struct ortentry route;
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_at sat;
#ifdef NS
struct sockaddr_ns sns;
#endif
struct sockaddr_dl sdl;
} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
typedef union sockunion *sup;
int pid, rtm_addrs, uid;
int s;
int forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
int iflag, verbose, aflen = sizeof (struct sockaddr_in);
int locking, lockrest, debugonly;
struct rt_metrics rt_metrics;
u_long rtm_inits;
int atalk_aton __P((const char *, struct at_addr *));
char *atalk_ntoa __P((struct at_addr));
#ifdef INET6
char *inet6_ntoa __P((struct sockaddr *sa));
#endif
char *routename(), *netname();
void flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
void print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
int getaddr(), rtmsg(), x25_makemask();
int prefixlen();
extern char *iso_ntoa();
void usage __P((const char *)) __dead2;
#ifdef INET6
char name_buf[MAXHOSTNAMELEN * 2 + 1]; /*for getnameinfo()*/
#endif
void
usage(cp)
const char *cp;
{
if (cp)
warnx("bad keyword: %s", cp);
(void) fprintf(stderr,
"usage: route [-dnqtv] command [[modifiers] args]\n");
exit(EX_USAGE);
/* NOTREACHED */
}
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
int
main(argc, argv)
int argc;
char **argv;
{
int ch;
if (argc < 2)
usage((char *)NULL);
while ((ch = getopt(argc, argv, "nqdtv")) != -1)
switch(ch) {
case 'n':
nflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'v':
verbose = 1;
break;
case 't':
tflag = 1;
break;
case 'd':
debugonly = 1;
break;
case '?':
default:
usage((char *)NULL);
}
argc -= optind;
argv += optind;
pid = getpid();
uid = getuid();
if (tflag)
s = open(_PATH_DEVNULL, O_WRONLY, 0);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0)
err(EX_OSERR, "socket");
setuid(uid);
if (*argv)
switch (keyword(*argv)) {
case K_GET:
uid = 0;
/* FALLTHROUGH */
case K_CHANGE:
case K_ADD:
case K_DELETE:
newroute(argc, argv);
/* NOTREACHED */
case K_MONITOR:
monitor();
/* NOTREACHED */
case K_FLUSH:
flushroutes(argc, argv);
exit(0);
/* NOTREACHED */
}
usage(*argv);
/* NOTREACHED */
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
void
flushroutes(argc, argv)
int argc;
char *argv[];
{
size_t needed;
int mib[6], rlen, seqno;
char *buf, *next, *lim;
register struct rt_msghdr *rtm;
if (uid) {
errx(EX_NOPERM, "must be root to alter routing table");
}
shutdown(s, 0); /* Don't want to read back our messages */
if (argc > 1) {
argv++;
if (argc == 2 && **argv == '-')
switch (keyword(*argv + 1)) {
case K_INET:
af = AF_INET;
break;
#ifdef INET6
case K_INET6:
af = AF_INET6;
break;
#endif
case K_ATALK:
af = AF_APPLETALK;
break;
#ifdef NS
case K_XNS:
af = AF_NS;
break;
#endif
case K_LINK:
af = AF_LINK;
break;
default:
goto bad;
} else
bad: 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 */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(EX_OSERR, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
errx(EX_OSERR, "malloc failed");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(EX_OSERR, "route-sysctl-get");
lim = buf + needed;
if (verbose)
(void) printf("Examining routing table from sysctl\n");
seqno = 0; /* ??? */
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (verbose)
print_rtmsg(rtm, rtm->rtm_msglen);
if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
continue;
if (af) {
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
if (sa->sa_family != af)
continue;
}
if (debugonly)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
rlen = write(s, next, rtm->rtm_msglen);
if (rlen < (int)rtm->rtm_msglen) {
warn("write to routing socket");
(void) 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 *)(rtm + 1);
(void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
routename(sa) : netname(sa));
sa = (struct sockaddr *)(sa->sa_len + (char *)sa);
(void) printf("%-20.20s ", routename(sa));
(void) printf("done\n");
}
}
}
char *
routename(sa)
struct sockaddr *sa;
{
register char *cp;
static char line[MAXHOSTNAMELEN + 1];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
#ifdef NS
char *ns_print();
#endif
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.'))) {
domain[MAXHOSTNAMELEN] = '\0';
(void) strcpy(domain, cp + 1);
} else
domain[0] = 0;
}
if (sa->sa_len == 0)
strcpy(line, "default");
else switch (sa->sa_family) {
case AF_INET:
{ struct in_addr in;
in = ((struct sockaddr_in *)sa)->sin_addr;
cp = 0;
if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
cp = "default";
if (cp == 0 && !nflag) {
hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
AF_INET);
if (hp) {
if ((cp = index(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = 0;
cp = hp->h_name;
}
}
if (cp) {
strncpy(line, cp, sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
} else
(void) sprintf(line, "%s", inet_ntoa(in));
break;
}
#ifdef INET6
case AF_INET6:
(void) snprintf(line, sizeof(line), "%s", inet6_ntoa(sa));
break;
#endif
case AF_APPLETALK:
(void) snprintf(line, sizeof(line), "atalk %s",
atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
break;
#ifdef NS
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
#endif
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
default:
{ u_short *s = (u_short *)sa;
u_short *slim = s + ((sa->sa_len + 1) >> 1);
char *cp = line + sprintf(line, "(%d)", sa->sa_family);
char *cpe = line + sizeof(line);
while (++s < slim && cp < cpe) /* start with sa->sa_data */
cp += snprintf(cp, cpe - cp, " %x", *s);
break;
}
}
return (line);
}
/*
* Return the name of the network whose address is given.
* The address is assumed to be that of a net or subnet, not a host.
*/
char *
netname(sa)
struct sockaddr *sa;
{
char *cp = 0;
static char line[MAXHOSTNAMELEN + 1];
struct netent *np = 0;
u_long net, mask;
register u_long i;
int subnetshift;
#ifdef NS
char *ns_print();
#endif
switch (sa->sa_family) {
case AF_INET:
{ struct in_addr in;
in = ((struct sockaddr_in *)sa)->sin_addr;
i = in.s_addr = ntohl(in.s_addr);
if (in.s_addr == 0)
cp = "default";
else if (!nflag) {
if (IN_CLASSA(i)) {
mask = IN_CLASSA_NET;
subnetshift = 8;
} else if (IN_CLASSB(i)) {
mask = IN_CLASSB_NET;
subnetshift = 8;
} else {
mask = IN_CLASSC_NET;
subnetshift = 4;
}
/*
* If there are more bits than the standard mask
* would suggest, subnets must be in use.
* Guess at the subnet mask, assuming reasonable
* width subnet fields.
*/
while (in.s_addr &~ mask)
mask = (long)mask >> subnetshift;
net = in.s_addr & mask;
while ((mask & 1) == 0)
mask >>= 1, net >>= 1;
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
#define C(x) (unsigned)((x) & 0xff)
if (cp)
strncpy(line, cp, sizeof(line));
else if ((in.s_addr & 0xffffff) == 0)
(void) sprintf(line, "%u", C(in.s_addr >> 24));
else if ((in.s_addr & 0xffff) == 0)
(void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16));
else if ((in.s_addr & 0xff) == 0)
(void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8));
else
(void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8),
C(in.s_addr));
#undef C
break;
}
#ifdef INET6
case AF_INET6:
(void) snprintf(line, sizeof(line), "%s", inet6_ntoa(sa));
break;
#endif
case AF_APPLETALK:
(void) snprintf(line, sizeof(line), "atalk %s",
atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
break;
#ifdef NS
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
break;
#endif
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
default:
{ u_short *s = (u_short *)sa->sa_data;
u_short *slim = s + ((sa->sa_len + 1)>>1);
char *cp = line + sprintf(line, "af %d:", sa->sa_family);
char *cpe = line + sizeof(line);
while (s < slim && cp < cpe)
cp += snprintf(cp, cpe - cp, " %x", *s++);
break;
}
}
return (line);
}
void
set_metric(value, key)
char *value;
int key;
{
int flag = 0;
u_long noval, *valp = &noval;
switch (key) {
#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
caseof(K_MTU, RTV_MTU, rmx_mtu);
caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
caseof(K_RTT, RTV_RTT, rmx_rtt);
caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
}
rtm_inits |= flag;
if (lockrest || locking)
rt_metrics.rmx_locks |= flag;
if (locking)
locking = 0;
*valp = atoi(value);
}
void
newroute(argc, argv)
int argc;
register char **argv;
{
char *cmd, *dest = "", *gateway = "", *err;
int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
int key;
struct hostent *hp = 0;
if (uid) {
errx(EX_NOPERM, "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;
#ifdef INET6
case K_INET6:
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
break;
#endif
case K_ATALK:
af = AF_APPLETALK;
aflen = sizeof(struct sockaddr_at);
break;
case K_SA:
af = PF_ROUTE;
aflen = sizeof(union sockunion);
break;
#ifdef NS
case K_XNS:
af = AF_NS;
aflen = sizeof(struct sockaddr_ns);
break;
#endif
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((char *)NULL);
(void) getaddr(RTA_IFA, *++argv, 0);
break;
case K_IFP:
if (!--argc)
usage((char *)NULL);
(void) getaddr(RTA_IFP, *++argv, 0);
break;
case K_GENMASK:
if (!--argc)
usage((char *)NULL);
(void) getaddr(RTA_GENMASK, *++argv, 0);
break;
case K_GATEWAY:
if (!--argc)
usage((char *)NULL);
(void) getaddr(RTA_GATEWAY, *++argv, 0);
break;
case K_DST:
if (!--argc)
usage((char *)NULL);
ishost = getaddr(RTA_DST, *++argv, &hp);
dest = *argv;
break;
case K_NETMASK:
if (!--argc)
usage((char *)NULL);
(void) getaddr(RTA_NETMASK, *++argv, 0);
/* FALLTHROUGH */
case K_NET:
forcenet++;
break;
case K_PREFIXLEN:
if (!--argc)
usage((char *)NULL);
if (prefixlen(*++argv) == -1) {
forcenet = 0;
ishost = 1;
} else {
forcenet = 1;
ishost = 0;
}
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((char *)NULL);
set_metric(*++argv, key);
break;
default:
usage(1+*argv);
}
} else {
if ((rtm_addrs & RTA_DST) == 0) {
dest = *argv;
ishost = getaddr(RTA_DST, *argv, &hp);
} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
gateway = *argv;
(void) getaddr(RTA_GATEWAY, *argv, &hp);
} else {
(void) getaddr(RTA_NETMASK, *argv, 0);
}
}
}
if (forcehost) {
ishost = 1;
#ifdef INET6
if (af == AF_INET6) {
rtm_addrs &= ~RTA_NETMASK;
memset((void *)&so_mask, 0, sizeof(so_mask));
}
#endif
}
if (forcenet)
ishost = 0;
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)) == 0)
break;
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr,
MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
} else
break;
}
if (*cmd == 'g')
exit(0);
oerrno = errno;
(void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
if (*gateway) {
(void) printf(": gateway %s", gateway);
if (attempts > 1 && ret == 0 && af == AF_INET)
(void) printf(" (%s)",
inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
}
if (ret == 0) {
(void) printf("\n");
exit(0);
} else {
switch (oerrno) {
case ESRCH:
err = "not in table";
break;
case EBUSY:
err = "entry in use";
break;
case ENOBUFS:
err = "routing table overflow";
break;
case EDQUOT: /* handle recursion avoidance in rt_setgate() */
err = "gateway uses the same route";
break;
default:
err = strerror(oerrno);
break;
}
(void) printf(": %s\n", err);
exit(1);
}
}
void
inet_makenetandmask(net, sin, bits)
u_long net, bits;
register struct sockaddr_in *sin;
{
u_long addr, mask = 0;
register char *cp;
rtm_addrs |= RTA_NETMASK;
if (net == 0)
mask = addr = 0;
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 = -1;
}
if (bits)
mask = 0xffffffff << (32 - bits);
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;
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
int
getaddr(which, s, hpp)
int which;
char *s;
struct hostent **hpp;
{
register sup su;
struct hostent *hp;
struct netent *np;
u_long val;
char *q;
int afamily; /* local copy of af so we can change it */
if (af == 0) {
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
}
afamily = af;
rtm_addrs |= which;
switch (which) {
case RTA_DST:
su = &so_dst;
break;
case RTA_GATEWAY:
su = &so_gate;
if (iflag) {
#define MAX_IFACES 400
int sock;
struct ifreq iflist[MAX_IFACES];
struct ifconf ifconf;
struct ifreq *ifr, *ifr_end;
struct sockaddr_dl *dl, *sdl = NULL;
/* Get socket */
if ((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
err(1, "socket");
/* Get interface list */
ifconf.ifc_req = iflist;
ifconf.ifc_len = sizeof(iflist);
if (ioctl(sock, SIOCGIFCONF, &ifconf) < 0)
err(1, "ioctl(SIOCGIFCONF)");
close(sock);
/* Look for this interface in the list */
for (ifr = ifconf.ifc_req,
ifr_end = (struct ifreq *)
(ifconf.ifc_buf + ifconf.ifc_len);
ifr < ifr_end;
ifr = (struct ifreq *) ((char *) &ifr->ifr_addr
+ MAX(ifr->ifr_addr.sa_len,
sizeof(ifr->ifr_addr)))) {
dl = (struct sockaddr_dl *)&ifr->ifr_addr;
if (ifr->ifr_addr.sa_family == AF_LINK
&& (ifr->ifr_flags & IFF_POINTOPOINT)
&& !strncmp(s, dl->sdl_data, dl->sdl_nlen)
&& s[dl->sdl_nlen] == 0) {
sdl = dl;
break;
}
}
/* If we found it, then use it */
if (sdl) {
su->sdl = *sdl;
return(1);
}
}
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:
usage("internal error");
/*NOTREACHED*/
}
su->sa.sa_len = aflen;
su->sa.sa_family = afamily; /* cases that don't want it have left already */
if (strcmp(s, "default") == 0) {
/*
* Default is net 0.0.0.0/0
*/
switch (which) {
case RTA_DST:
forcenet++;
/* bzero(su, sizeof(*su)); *//* for readability */
(void) getaddr(RTA_NETMASK, s, 0);
break;
case RTA_NETMASK:
case RTA_GENMASK:
/* bzero(su, sizeof(*su)); *//* for readability */
}
return (0);
}
switch (afamily) {
#ifdef INET6
case AF_INET6:
{
struct addrinfo hints, *res;
int error;
bzero(&hints, sizeof(struct addrinfo));
hints.ai_family = AF_INET6;
error = getaddrinfo(s, NULL, &hints, &res);
if (error != 0) {
(void) fprintf(stderr, "%s: bad value\n",
gai_strerror(error));
if (error == EAI_SYSTEM)
(void) fprintf(stderr, "%s\n",
strerror(errno));
exit(1);
}
bcopy(res->ai_addr, &su->sa, res->ai_addrlen);
/* XXX: embedded link local addr check */
if (IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr))
*(u_short *)&su->sin6.sin6_addr.s6_addr[2] =
ntohs(su->sin6.sin6_scope_id);
su->sin6.sin6_scope_id = 0;
return 0;
}
#endif
#ifdef NS
case AF_NS:
if (which == RTA_DST) {
extern short ns_bh[3];
struct sockaddr_ns *sms = &(so_mask.sns);
bzero((char *)sms, sizeof(*sms));
sms->sns_family = 0;
sms->sns_len = 6;
sms->sns_addr.x_net = *(union ns_net *)ns_bh;
rtm_addrs |= RTA_NETMASK;
}
su->sns.sns_addr = ns_addr(s);
return (!ns_nullhost(su->sns.sns_addr));
#endif
case AF_APPLETALK:
if (!atalk_aton(s, &su->sat.sat_addr))
errx(EX_NOHOST, "bad address: %s", s);
rtm_addrs |= RTA_NETMASK;
return(forcehost || su->sat.sat_addr.s_node != 0);
case AF_LINK:
link_addr(s, &su->sdl);
return (1);
case PF_ROUTE:
su->sa.sa_len = sizeof(*su);
sockaddr(s, &su->sa);
return (1);
case AF_INET:
default:
break;
}
if (hpp == NULL)
hpp = &hp;
*hpp = NULL;
q = strchr(s,'/');
if (q && which == RTA_DST) {
*q = '\0';
if ((val = inet_network(s)) != INADDR_NONE) {
inet_makenetandmask(
val, &su->sin, strtoul(q+1, 0, 0));
return (0);
}
*q = '/';
}
if ((which != RTA_DST || forcenet == 0) &&
(val = inet_addr(s)) != INADDR_NONE) {
su->sin.sin_addr.s_addr = val;
if (which != RTA_DST ||
inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
return (1);
else {
val = ntohl(val);
goto netdone;
}
}
if (which == RTA_DST && forcehost == 0 &&
((val = inet_network(s)) != INADDR_NONE ||
((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
netdone:
inet_makenetandmask(val, &su->sin, 0);
return (0);
}
hp = gethostbyname(s);
if (hp) {
*hpp = hp;
su->sin.sin_family = hp->h_addrtype;
bcopy(hp->h_addr, (char *)&su->sin.sin_addr,
MIN(hp->h_length, sizeof(su->sin.sin_addr)));
return (1);
}
errx(EX_NOHOST, "bad address: %s", s);
}
int
prefixlen(s)
char *s;
{
int len = atoi(s), q, r;
int max;
char *p;
rtm_addrs |= RTA_NETMASK;
switch (af) {
#ifdef INET6
case AF_INET6:
max = 128;
p = (char *)&so_mask.sin6.sin6_addr;
break;
#endif
case AF_INET:
max = 32;
p = (char *)&so_mask.sin.sin_addr;
break;
default:
(void) fprintf(stderr, "prefixlen not supported in this af\n");
exit(1);
/*NOTREACHED*/
}
if (len < 0 || max < len) {
(void) fprintf(stderr, "%s: bad value\n", s);
exit(1);
}
q = len >> 3;
r = len & 7;
so_mask.sa.sa_family = af;
so_mask.sa.sa_len = aflen;
memset((void *)p, 0, max / 8);
if (q > 0)
memset((void *)p, 0xff, q);
if (r > 0)
*((u_char *)p + q) = (0xff00 >> r) & 0xff;
if (len == max)
return -1;
else
return len;
}
#ifdef NS
short ns_nullh[] = {0,0,0};
short ns_bh[] = {-1,-1,-1};
char *
ns_print(sns)
struct sockaddr_ns *sns;
{
struct ns_addr work;
union { union ns_net net_e; u_long long_e; } net;
u_short port;
static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
char *host = "";
register char *p;
register u_char *q;
work = sns->sns_addr;
port = ntohs(work.x_port);
work.x_port = 0;
net.net_e = work.x_net;
if (ns_nullhost(work) && net.long_e == 0) {
if (!port)
return ("*.*");
(void) sprintf(mybuf, "*.%XH", port);
return (mybuf);
}
if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0)
host = "any";
else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0)
host = "*";
else {
q = work.x_host.c_host;
(void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
q[0], q[1], q[2], q[3], q[4], q[5]);
for (p = chost; *p == '0' && p < chost + 12; p++)
/* void */;
host = p;
}
if (port)
(void) sprintf(cport, ".%XH", htons(port));
else
*cport = 0;
(void) snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
(unsigned long)ntohl(net.long_e),
host, cport);
return (mybuf);
}
#endif
void
interfaces()
{
size_t needed;
int mib[6];
char *buf, *lim, *next;
register 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(EX_OSERR, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
errx(EX_OSERR, "malloc failed");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(EX_OSERR, "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);
}
}
void
monitor()
{
int n;
char msg[2048];
verbose = 1;
if (debugonly) {
interfaces();
exit(0);
}
for(;;) {
time_t now;
n = read(s, msg, 2048);
now = time(NULL);
(void) printf("\ngot 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(cmd, flags)
int cmd, flags;
{
static int seq;
int rlen;
register char *cp = m_rtmsg.m_space;
register int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) {\
l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\
if (verbose) sodump(&(u),"u");\
}
errno = 0;
bzero((char *)&m_rtmsg, 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_version = RTM_VERSION;
rtm.rtm_seq = ++seq;
rtm.rtm_addrs = rtm_addrs;
rtm.rtm_rmx = rt_metrics;
rtm.rtm_inits = rtm_inits;
if (rtm_addrs & RTA_NETMASK)
mask_addr();
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);
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
if (verbose)
print_rtmsg(&rtm, l);
if (debugonly)
return (0);
if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
warn("writing to routing socket");
return (-1);
}
if (cmd == RTM_GET) {
do {
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
if (l < 0)
warn("read from routing socket");
else
print_getmsg(&rtm, l);
}
#undef rtm
return (0);
}
void
mask_addr()
{
int olen = so_mask.sa.sa_len;
register char *cp1 = olen + (char *)&so_mask, *cp2;
for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
if (*--cp1 != 0) {
so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
break;
}
if ((rtm_addrs & RTA_DST) == 0)
return;
switch (so_dst.sa.sa_family) {
#ifdef NS
case AF_NS:
#endif
case AF_INET:
#ifdef INET6
case AF_INET6:
#endif
case AF_APPLETALK:
case 0:
return;
}
cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
while (cp2 > cp1)
*--cp2 = 0;
cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
while (cp1 > so_dst.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_NEWMADDR: new multicast group membership on iface",
"RTM_DELMADDR: multicast group membership removed from iface",
0,
};
char metricnames[] =
"\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
"\1mtu";
char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
"\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
"\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
"\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
char ifnetflags[] =
"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
"\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
"\017LINK2\020MULTICAST";
char addrnames[] =
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
void
print_rtmsg(rtm, msglen)
register struct rt_msghdr *rtm;
int msglen;
{
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
#ifdef RTM_NEWMADDR
struct ifma_msghdr *ifmam;
#endif
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
(void) printf("routing message version %d not understood\n",
rtm->rtm_version);
return;
}
(void)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, flags:", ifm->ifm_index);
bprintf(stdout, ifm->ifm_flags, ifnetflags);
pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
ifam = (struct ifa_msghdr *)rtm;
(void) printf("metric %d, flags:", ifam->ifam_metric);
bprintf(stdout, ifam->ifam_flags, routeflags);
pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
break;
#ifdef RTM_NEWMADDR
case RTM_NEWMADDR:
case RTM_DELMADDR:
ifmam = (struct ifma_msghdr *)rtm;
pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
break;
#endif
default:
(void) printf("pid: %ld, seq %d, errno %d, flags:",
(long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags, routeflags);
pmsg_common(rtm);
}
}
void
print_getmsg(rtm, msglen)
register struct rt_msghdr *rtm;
int msglen;
{
struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
struct sockaddr_dl *ifp = NULL;
register struct sockaddr *sa;
register char *cp;
register int i;
(void) printf(" route to: %s\n", routename(&so_dst));
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) {
errno = rtm->rtm_errno;
warn("message indicates error %d", errno);
return;
}
cp = ((char *)(rtm + 1));
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_IFP:
if (sa->sa_family == AF_LINK &&
((struct sockaddr_dl *)sa)->sdl_nlen)
ifp = (struct sockaddr_dl *)sa;
break;
}
ADVANCE(cp, sa);
}
if (dst && mask)
mask->sa_family = dst->sa_family; /* XXX */
if (dst)
(void)printf("destination: %s\n", routename(dst));
if (mask) {
int savenflag = nflag;
nflag = 1;
(void)printf(" mask: %s\n", routename(mask));
nflag = savenflag;
}
if (gate && rtm->rtm_flags & RTF_GATEWAY)
(void)printf(" gateway: %s\n", routename(gate));
if (ifp)
(void)printf(" interface: %.*s\n",
ifp->sdl_nlen, ifp->sdl_data);
(void)printf(" flags: ");
bprintf(stdout, rtm->rtm_flags, routeflags);
#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
#define msec(u) (((u) + 500) / 1000) /* usec to msec */
(void) printf("\n%s\n", "\
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
if (rtm->rtm_rmx.rmx_expire)
rtm->rtm_rmx.rmx_expire -= time(0);
printf("%8ld%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) {
(void) printf("sockaddrs: ");
bprintf(stdout, rtm->rtm_addrs, addrnames);
putchar('\n');
}
#undef RTA_IGN
}
void
pmsg_common(rtm)
register struct rt_msghdr *rtm;
{
(void) printf("\nlocks: ");
bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
(void) printf(" inits: ");
bprintf(stdout, rtm->rtm_inits, metricnames);
pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
}
void
pmsg_addrs(cp, addrs)
char *cp;
int addrs;
{
register struct sockaddr *sa;
int i;
if (addrs == 0) {
(void) putchar('\n');
return;
}
(void) printf("\nsockaddrs: ");
bprintf(stdout, addrs, addrnames);
(void) putchar('\n');
for (i = 1; i; i <<= 1)
if (i & addrs) {
sa = (struct sockaddr *)cp;
(void) printf(" %s", routename(sa));
ADVANCE(cp, sa);
}
(void) putchar('\n');
(void) fflush(stdout);
}
void
bprintf(fp, b, s)
register FILE *fp;
register int b;
register u_char *s;
{
register int i;
int gotsome = 0;
if (b == 0)
return;
while ((i = *s++) != 0) {
if (b & (1 << (i-1))) {
if (gotsome == 0)
i = '<';
else
i = ',';
(void) putc(i, fp);
gotsome = 1;
for (; (i = *s) > 32; s++)
(void) putc(i, fp);
} else
while (*s > 32)
s++;
}
if (gotsome)
(void) putc('>', fp);
}
int
keyword(cp)
char *cp;
{
register struct keytab *kt = keywords;
while (kt->kt_cp && strcmp(kt->kt_cp, cp))
kt++;
return kt->kt_i;
}
void
sodump(su, which)
register sup su;
char *which;
{
switch (su->sa.sa_family) {
case AF_LINK:
(void) printf("%s: link %s; ",
which, link_ntoa(&su->sdl));
break;
case AF_INET:
(void) printf("%s: inet %s; ",
which, inet_ntoa(su->sin.sin_addr));
break;
case AF_APPLETALK:
(void) printf("%s: atalk %s; ",
which, atalk_ntoa(su->sat.sat_addr));
break;
#ifdef NS
case AF_NS:
(void) printf("%s: xns %s; ",
which, ns_ntoa(su->sns.sns_addr));
break;
#endif
}
(void) 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(addr, sa)
register char *addr;
register struct sockaddr *sa;
{
register char *cp = (char *)sa;
int size = sa->sa_len;
char *cplim = cp + size;
register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
bzero(cp, 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;
}
int
atalk_aton(const char *text, struct at_addr *addr)
{
u_int net, node;
if (sscanf(text, "%u.%u", &net, &node) != 2
|| net > 0xffff || node > 0xff)
return(0);
addr->s_net = htons(net);
addr->s_node = node;
return(1);
}
char *
atalk_ntoa(struct at_addr at)
{
static char buf[20];
(void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
return(buf);
}
#ifdef INET6
char *
inet6_ntoa(struct sockaddr *sa)
{
char *cp;
struct sockaddr_in6 *sin6;
int error = -1, gap;
cp = NULL;
sin6 = (struct sockaddr_in6 *)sa;
gap = sizeof(struct sockaddr_in6) - sin6->sin6_len;
if (gap > 0)
bzero((char *)(sin6) + sin6->sin6_len, gap);
/* XXX: embedded link local addr check */
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
*(u_short *)&sin6->sin6_addr.s6_addr[2] != 0) {
u_short index;
index = *(u_short *)&sin6->sin6_addr.s6_addr[2];
*(u_short *)&sin6->sin6_addr.s6_addr[2] = 0;
if (sin6->sin6_scope_id == 0)
sin6->sin6_scope_id = ntohs(index);
}
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || sa->sa_len < 4)
cp = "default";
if (cp == 0 && !nflag)
error = getnameinfo(sa, sa->sa_len, name_buf, sizeof(name_buf),
NULL, 0, NI_NAMEREQD);
if (error != 0)
error = getnameinfo(sa, sa->sa_len, name_buf,
sizeof(name_buf), NULL, 0,
NI_NUMERICHOST|NI_WITHSCOPEID);
if (error != 0)
inet_ntop(AF_INET6, &sin6->sin6_addr, name_buf,
sizeof(name_buf));
return (cp != NULL) ? cp : name_buf;
}
#endif
Reference in New Issue View Git Blame Copy Permalink