projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
This works with new routing message headers.
[unix-history] / usr / src / sbin / route / route.c
/*
* Copyright (c) 1983, 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)route.c 5.19 (Berkeley) %G%";
#endif /* not lint */
#include <paths.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/mbuf.h>
#include <sys/kinfo.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netns/ns.h>
#include <netiso/iso.h>
#include <netdb.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
struct ortentry route;
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_ns sns;
struct sockaddr_iso siso;
} so_dst, so_gate, so_mask;
int s;
int forcehost, forcenet, doflush, nflag, xnsflag, qflag, Cflag;
int iflag, osiflag, verbose;
int pid;
struct sockaddr_in sin = { sizeof(sin), AF_INET };
struct in_addr inet_makeaddr();
char *malloc(), *vmunix = _PATH_UNIX;
#define kget(p, d) \
(lseek(kmem, (off_t)(p), 0), read(kmem, (char *)&(d), sizeof (d)))
main(argc, argv)
int argc;
char *argv[];
{
char *argvp;
if (argc < 2)
usage:
fprintf(stderr,
"usage: route [ -n ] [ -f ] [ cmd [ net | host ] args ]\n"),
exit(1);
argc--, argv++;
for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
for (argvp = argv[0]++; *argvp; argvp++)
switch (*argv[0]) {
case 'f':
doflush++;
break;
case 'n':
nflag++;
break;
case 'x':
xnsflag++;
break;
case 'q':
qflag++;
break;
case 'C':
Cflag++; /* Use old ioctls */
break;
case 'k':
vmunix = *++argv;
argc--;
break;
case 'i':
iflag++;
break;
case 'o':
osiflag++;
break;
case 'v':
verbose++;
}
}
pid = getpid();
if (Cflag)
s = socket(AF_INET, SOCK_RAW, 0);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0) {
perror("route: socket");
exit(1);
}
if (doflush) {
flushroutes();
exit(0);
}
if (argc > 0) {
if (strcmp(*argv, "add") == 0)
newroute(argc, argv);
else if (strcmp(*argv, "delete") == 0)
newroute(argc, argv);
else if (strcmp(*argv, "change") == 0)
changeroute(argc-1, argv+1);
else if (strcmp(*argv, "monitor") == 0)
monitor();
else
fprintf(stderr, "%s: huh?\n", *argv);
} else
goto usage;
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
#include <nlist.h>
struct nlist nl[] = {
#define N_RTHOST 0
{ "_rthost" },
#define N_RTNET 1
{ "_rtnet" },
#define N_RTHASHSIZE 2
{ "_rthashsize" },
#define N_RTREE 3
{ "_radix_node_head" },
"",
};
int kmem;
flushroutes()
{
extern int errno;
register struct ortentry *rt;
register struct mbuf *m;
struct mbuf mb, **routehash;
int rthashsize, i, doinghost = 1;
char *routename(), *netname(), *strerror();
nlist(vmunix, nl);
kmem = open(_PATH_KMEM, O_RDONLY, 0);
if (kmem < 0) {
(void)fprintf(stderr,
"route: %s: %s\n", _PATH_KMEM, strerror(errno));
exit(1);
}
if (nl[N_RTREE].n_value)
return (treefree());
if (nl[N_RTHOST].n_value == 0) {
fprintf(stderr,
"route: \"rthost\", symbol not in namelist\n");
exit(1);
}
if (nl[N_RTNET].n_value == 0) {
fprintf(stderr,
"route: \"rtnet\", symbol not in namelist\n");
exit(1);
}
if (nl[N_RTHASHSIZE].n_value == 0) {
fprintf(stderr,
"route: \"rthashsize\", symbol not in namelist\n");
exit(1);
}
kget(nl[N_RTHASHSIZE].n_value, rthashsize);
routehash = (struct mbuf **)malloc(rthashsize*sizeof (struct mbuf *));
lseek(kmem, nl[N_RTHOST].n_value, 0);
read(kmem, routehash, rthashsize*sizeof (struct mbuf *));
printf("Flushing routing tables:\n");
again:
for (i = 0; i < rthashsize; i++) {
if (routehash[i] == 0)
continue;
m = routehash[i];
while (m) {
kget(m, mb);
d_ortentry((struct ortentry *)(mb.m_dat), doinghost);
m = mb.m_next;
}
}
if (doinghost) {
lseek(kmem, nl[N_RTNET].n_value, 0);
read(kmem, routehash, rthashsize*sizeof (struct mbuf *));
doinghost = 0;
goto again;
}
close(kmem);
free(routehash);
return;
}
treefree()
{
int bufsize, needed, seqno, rlen;
char *buf, *next, *lim;
register struct rt_msghdr *rtm;
struct {
struct rt_msghdr m_rtm;
union {
char u_saddrs[200];
struct sockaddr u_sa;
} m_u;
} m;
if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0)
{ perror("route-getkerninfo-estimate"); exit(1);}
if ((buf = malloc(needed)) == 0)
{ printf("out of space\n");; exit(1);}
if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0)
{ perror("actual retrieval of routing table"); exit(1);}
lim = buf + rlen;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if ((rtm->rtm_flags & (RTF_GATEWAY|RTF_HOST)) == 0)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
if ((rlen = write(s, next, rtm->rtm_msglen)) < 0) {
perror("writing to routing socket");
printf("got only %d for rlen\n", rlen);
return (-1);
}
again:
if ((rlen = read(s, (char *)&m, sizeof (m))) < 0) {
perror("reading from routing socket");
printf("got only %d for rlen\n", rlen);
return (-1);
}
if ((m.m_rtm.rtm_pid != pid) || (m.m_rtm.rtm_seq != seqno)) {
printf("Got response for somebody else's request");
goto again;
}
seqno++;
if (qflag)
continue;
if (verbose) {
print_rtmsg(rtm);
} else {
struct sockaddr *sa = &m.m_u.u_sa;
printf("%-20.20s ", (rtm->rtm_flags & RTF_HOST) ?
routename(sa) : netname(sa));
sa = (struct sockaddr *)(sa->sa_len + (char *)sa);
printf("%-20.20s ", routename(sa));
printf("done\n");
}
}
}
d_ortentry(rt)
register struct ortentry *rt;
{
int doinghost = rt->rt_flags & RTF_HOST;
if (rt->rt_flags & RTF_GATEWAY) {
if (qflag == 0) {
printf("%-20.20s ", doinghost ?
routename(&rt->rt_dst) :
netname(&rt->rt_dst));
printf("%-20.20s ", routename(&rt->rt_gateway));
if (ioctl(s, SIOCDELRT, (caddr_t)rt) < 0) {
fflush(stdout);
error("delete");
} else
printf("done\n");
} else
(void) ioctl(s, SIOCDELRT, (caddr_t)rt);
}
}
struct ortentry ortentry;
d_rtentry(rt)
register struct rtentry *rt;
{
int doinghost = rt->rt_flags & RTF_HOST;
int result;
ortentry.rt_flags = rt->rt_flags;
ortentry.rt_dst = *(rt_key(rt));
ortentry.rt_gateway = *(rt->rt_gateway);
if (rt->rt_flags & RTF_GATEWAY) {
if (Cflag == 0)
result = rtmsg('d', rt_key(rt), rt->rt_gateway,
rt_mask(rt), rt->rt_flags);
else
result = ioctl(s, SIOCDELRT, (caddr_t)&ortentry);
if (qflag == 0) {
printf("%-20.20s ", doinghost ?
routename(rt_key(rt)) : netname(rt_key(rt)));
printf("%-20.20s ", routename(rt->rt_gateway));
if (result < 0) {
fflush(stdout);
error("delete");
} else
printf("done\n");
}
}
}
char *
routename(sa)
struct sockaddr *sa;
{
register char *cp;
static char line[50];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
char *index();
char *ns_print();
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.')))
(void) strcpy(domain, cp + 1);
else
domain[0] = 0;
}
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)
cp = "default";
if (cp == 0 && !nflag) {
hp = gethostbyaddr(&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)
strcpy(line, cp);
else {
#define C(x) ((x) & 0xff)
in.s_addr = ntohl(in.s_addr);
(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));
}
break;
}
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
default:
{ u_short *s = (u_short *)sa->sa_data;
(void)sprintf(line, "(%d) %x %x %x %x %x %x %x",
sa->sa_family, s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
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[50];
struct netent *np = 0;
u_long net, mask;
register u_long i;
int subnetshift;
char *ns_print();
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;
}
if (cp)
strcpy(line, cp);
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));
break;
}
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
break;
default:
{ u_short *s = (u_short *)sa->sa_data;
(void)sprintf(line, "af %d: %x %x %x %x %x %x %x",
sa->sa_family, s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
break;
}
}
return (line);
}
newroute(argc, argv)
int argc;
char *argv[];
{
struct sockaddr_in *sin;
char *cmd, *dest, *gateway, *mask;
int ishost, metric = 0, ret, attempts, oerrno, flags = 0;
struct hostent *hp;
extern int errno;
cmd = argv[0];
if ((strcmp(argv[1], "host")) == 0) {
forcehost++;
argc--, argv++;
} else if ((strcmp(argv[1], "net")) == 0) {
forcenet++;
argc--, argv++;
}
ishost = getaddr(argv[1], &so_dst.sa, &so_mask.sa,
&hp, &dest, forcenet);
if (forcehost)
ishost = 1;
if (forcenet)
ishost = 0;
(void) getaddr(argv[2], &so_gate.sa, 0, &hp, &gateway, 0);
if ((Cflag == 0) && argc == 4) {
ret = atoi(argv[3]);
if (ret == 0) {
printf("old usage of trailing 0, assuming route to if\n");
iflag = 1;
} else if (ret > 0 && ret < 10) {
printf("old usage of trailing digit, ");
printf("assuming route via gateway\n");
iflag = 0;
} else
(void) getaddr(argv[3], &so_mask.sa, 0, &hp, &mask, 0);
}
flags = RTF_UP;
if (ishost)
flags |= RTF_HOST;
if (iflag == 0)
flags |= RTF_GATEWAY;
for (attempts = 1; ; attempts++) {
errno = 0;
if (Cflag) {
route.rt_flags = flags;
route.rt_dst = so_dst.sa;
route.rt_gateway = so_gate.sa;
if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT,
(caddr_t)&route)) == 0)
break;
} else {
if ((ret = rtmsg(*cmd, &so_dst.sa, &so_gate.sa,
(ishost ? 0 : &so_mask.sa), flags)) == 0)
break;
}
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr,
hp->h_length);
} else
break;
}
oerrno = errno;
printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net",
dest, gateway);
if (attempts > 1 && ret == 0)
printf(" (%s)",
inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
if (ret == 0)
printf("\n");
else {
printf(": ");
fflush(stdout);
errno = oerrno;
error(0);
}
}
changeroute(argc, argv)
int argc;
char *argv[];
{
printf("not supported\n");
}
error(cmd)
char *cmd;
{
extern int errno;
switch(errno) {
case ESRCH:
printf("not in table\n");
break;
case EBUSY:
printf("entry in use\n");
break;
case ENOBUFS:
printf("routing table overflow\n");
break;
default:
printf("ioctl returns %d\n", errno);
perror(cmd);
}
fflush(stdout);
errno = 0;
}
char *
savestr(s)
char *s;
{
char *sav;
sav = malloc(strlen(s) + 1);
if (sav == NULL) {
fprintf("route: out of memory\n");
exit(1);
}
strcpy(sav, s);
return (sav);
}
inet_makenetandmask(net, sin, sockmask)
u_long net;
struct sockaddr_in *sin, *sockmask;
{
u_long addr;
u_long mask = 0;
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;
}
sin->sin_addr.s_addr = (htonl(addr));
if (sockmask) {
register char *cp = (char *)&(sockmask->sin_port);
register char *cpbase = (char *)&(sockmask->sin_addr);
sockmask->sin_addr.s_addr = htonl(mask);
sockmask->sin_len = 0;
sockmask->sin_family = 0;
while (--cp >= cpbase)
if (*cp) {
sockmask->sin_len = 1 + cp - (caddr_t)sockmask;
break;
}
}
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
getaddr(s, sin, sockmask, hpp, name, isnet)
char *s;
struct sockaddr_in *sin, *sockmask;
struct hostent **hpp;
char **name;
int isnet;
{
struct sockaddr_ns *sns = (struct sockaddr_ns *)sin;
struct ns_addr ns_addr();
struct hostent *hp;
struct netent *np;
u_long val = 1;
if (strcmp(s, "default") == 0) {
val = 0;
*name = "default";
}
if (xnsflag)
goto do_xns;
if (osiflag)
goto do_osi;
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
if (val == 0)
goto out;
*hpp = 0;
if (isnet == 0) {
val = inet_addr(s);
if (val != -1) {
sin->sin_addr.s_addr = val;
*name = s;
if (inet_lnaof(sin->sin_addr) != INADDR_ANY)
return (1);
else
goto out;
}
}
val = inet_network(s);
if (val != -1) {
*name = s;
goto out;
}
np = getnetbyname(s);
if (np) {
val = np->n_net;
*name = savestr(np->n_name);
goto out;
}
hp = gethostbyname(s);
if (hp) {
*hpp = hp;
sin->sin_family = hp->h_addrtype;
bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
*name = savestr(hp->h_name);
return (1);
}
fprintf(stderr, "%s: bad value\n", s);
exit(1);
out:
inet_makenetandmask(val, sin, sockmask);
return (0);
do_xns:
bzero((char *)sns, sizeof(*sns));
sns->sns_family = AF_NS;
sns->sns_len = sizeof (*sns);
if (val == 0)
return(0);
if (sockmask) {
extern short ns_bh[3];
struct sockaddr_ns *sms = (struct sockaddr_ns *)sockmask;
bzero((char *)sms, sizeof(*sns));
sms->sns_family = 0;
sms->sns_len = 6;
sms->sns_addr.x_net = *(union ns_net *)ns_bh;
}
*name = s;
sns->sns_addr = ns_addr(s);
return (!ns_nullhost(sns->sns_addr));
do_osi:
{
struct sockaddr_iso *siso = (struct sockaddr_iso *)sin;
struct iso_addr iso_addr();
siso->siso_family = AF_ISO;
siso->siso_len = sizeof(*siso);
if (val == 0)
return (0);
*name = s;
siso->siso_addr = iso_addr(s);
return (1);
}
}
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], cport[10], chost[25];
char *host = "";
register char *p; register u_char *q; u_char *q_lim;
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 ) {
(void)sprintf(mybuf, "*.%xH", port);
upHex(mybuf);
} else
(void)sprintf(mybuf, "*.*");
return (mybuf);
}
if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
host = "any";
} else if (bcmp(ns_nullh, 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++);
host = p;
}
if (port)
(void)sprintf(cport, ".%xH", htons(port));
else
*cport = 0;
(void)sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport);
upHex(mybuf);
return(mybuf);
}
upHex(p0)
char *p0;
{
register char *p = p0;
for (; *p; p++) switch (*p) {
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
*p += ('A' - 'a');
}
}
monitor()
{
int n;
char msg[2048];
verbose = 1;
for(;;) {
n = read(s, msg, 2048);
printf("got message of size %d\n", n);
print_rtmsg((struct rt_msghdr *)msg, n);
}
}
struct {
struct rt_msghdr m_rtm;
struct sockaddr_in m_dst, m_gateway, m_mask;
} m_rtmsg;
rtmsg(cmd, dst, gateway, mask, flags)
struct sockaddr_in *dst, *gateway, *mask;
{
static int seq;
int len = sizeof(m_rtmsg), rlen;
extern int errno;
errno = 0;
bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
if (cmd == 'a')
cmd = RTM_ADD;
else if (cmd == 'c')
cmd = RTM_CHANGE;
else
cmd = RTM_DELETE;
m_rtmsg.m_rtm.rtm_flags = flags;
m_rtmsg.m_rtm.rtm_version = RTM_VERSION;
m_rtmsg.m_rtm.rtm_seq = ++seq;
m_rtmsg.m_dst = *dst;
m_rtmsg.m_gateway = *gateway;
m_rtmsg.m_rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
if (mask) {
m_rtmsg.m_mask = *mask;
m_rtmsg.m_rtm.rtm_addrs = RTA_NETMASK;
} else {
len -= sizeof (*mask);
}
m_rtmsg.m_rtm.rtm_msglen = len;
m_rtmsg.m_rtm.rtm_type = cmd;
if ((rlen = write(s, (char *)&m_rtmsg, len)) < 0) {
perror("writing to routing socket");
printf("got only %d for rlen\n", rlen);
return (-1);
}
again:
if ((rlen = read(s, (char *)&m_rtmsg, len)) < 0) {
perror("reading from routing socket");
printf("got only %d for rlen\n", rlen);
return (-1);
}
if ((m_rtmsg.m_rtm.rtm_pid != pid) ||
(m_rtmsg.m_rtm.rtm_seq != seq)) {
printf("Got response for somebody else's request");
goto again;
}
if (qflag == 0)
print_rtmsg( &m_rtmsg.m_rtm, rlen);
if ((m_rtmsg.m_rtm.rtm_flags & RTF_DONE) == 0) {
errno = m_rtmsg.m_rtm.rtm_errno;
perror("response from routing socket turned down");
return (-1);
}
return (0);
}
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",
0, };
char metricnames[] =
"\010rttvar\7rtt\6ssthresh\7sendpipe\4recvpipe\3expire\2hopcount\1mtu";
#define ROUNDUP(a) ((char *)(1 + (((((int)a)) - 1) | (sizeof(long) - 1))))
print_rtmsg(rtm, n)
register struct rt_msghdr *rtm;
{
char *cp;
register struct sockaddr *sa;
int i;
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
printf("routing message version %d not understood\n",
rtm->rtm_version);
} else {
printf("%s\npid: %d, len %d, seq %d, errno %d, flags:",
msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen,
rtm->rtm_seq, rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags,
"\1UP\2GATEWAY\3HOST\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT");
printf("\nlocks: "); bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
printf(" inits: "); bprintf(stdout, rtm->rtm_inits, metricnames);
printf("\n%d sockaddrs: ", i);
bprintf(stdout, rtm->rtm_addrs,
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR");
putchar('\n');
cp = ((char *)(rtm + 1));
if (rtm->rtm_addrs)
for (i = 1; i; i <<= 1)
if (i & rtm->rtm_addrs) {
sa = (struct sockaddr *)cp;
printf(" %s", routename(sa));
cp = ROUNDUP(cp + sa->sa_len);
}
putchar('\n');
}
fflush(stdout);
}
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++) {
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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.