freebsd-skq/sbin/routed/rtquery/rtquery.c
Mike Barcroft fd8e4ebc8c o Move NTOHL() and associated macros into <sys/param.h>. These are
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
  source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
  Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
  POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
  and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
  complexities associated with having MD (asm and inline) versions, and
  having to prevent exposure of these functions in other headers that
  happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
  third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.

Tested on:	alpha, i386
Reviewed by:	bde, jake, tmm
2002-02-18 20:35:27 +00:00

911 lines
20 KiB
C

/*-
* Copyright (c) 1982, 1986, 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 acknowledgment:
* 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.
*
* $FreeBSD$
*/
char copyright[] =
"@(#) Copyright (c) 1982, 1986, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#define RIPVERSION RIPv2
#include <protocols/routed.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef sgi
#include <strings.h>
#include <bstring.h>
#endif
#if !defined(sgi) && !defined(__NetBSD__)
static char sccsid[] __attribute__((unused))= "@(#)query.c 8.1 (Berkeley) 6/5/93";
#elif defined(__NetBSD__)
__RCSID("$NetBSD: rtquery.c,v 1.10 1999/02/23 10:47:41 christos Exp $");
#endif
#ident "$Revision: 1.12 $"
#ifndef sgi
#define _HAVE_SIN_LEN
#endif
#define MD5_DIGEST_LEN 16
typedef struct {
u_int32_t state[4]; /* state (ABCD) */
u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */
unsigned char buffer[64]; /* input buffer */
} MD5_CTX;
extern void MD5Init(MD5_CTX*);
extern void MD5Update(MD5_CTX*, u_char*, u_int);
extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*);
#define WTIME 15 /* Time to wait for all responses */
#define STIME (250*1000) /* usec to wait for another response */
int soc;
const char *pgmname;
union {
struct rip rip;
char packet[MAXPACKETSIZE+MAXPATHLEN];
} omsg_buf;
#define OMSG omsg_buf.rip
int omsg_len = sizeof(struct rip);
union {
struct rip rip;
char packet[MAXPACKETSIZE+1024];
} imsg_buf;
#define IMSG imsg_buf.rip
int nflag; /* numbers, no names */
int pflag; /* play the `gated` game */
int ripv2 = 1; /* use RIP version 2 */
int wtime = WTIME;
int rflag; /* 1=ask about a particular route */
int trace, not_trace; /* send trace command or not */
int auth_type = RIP_AUTH_NONE;
char passwd[RIP_AUTH_PW_LEN];
u_long keyid;
struct timeval sent; /* when query sent */
static char localhost_str[] = "localhost";
static char *default_argv[] = {localhost_str, 0};
static void rip_input(struct sockaddr_in*, int);
static int out(const char *);
static void trace_loop(char *argv[]) __attribute((__noreturn__));
static void query_loop(char *argv[], int) __attribute((__noreturn__));
static int getnet(char *, struct netinfo *);
static u_int std_mask(u_int);
static int parse_quote(char **, const char *, char *, char *, int);
static void usage(void);
int
main(int argc,
char *argv[])
{
int ch, bsize;
char *p, *options, *value, delim;
const char *result;
OMSG.rip_nets[0].n_dst = RIP_DEFAULT;
OMSG.rip_nets[0].n_family = RIP_AF_UNSPEC;
OMSG.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY);
pgmname = argv[0];
while ((ch = getopt(argc, argv, "np1w:r:t:a:")) != -1)
switch (ch) {
case 'n':
not_trace = 1;
nflag = 1;
break;
case 'p':
not_trace = 1;
pflag = 1;
break;
case '1':
ripv2 = 0;
break;
case 'w':
not_trace = 1;
wtime = (int)strtoul(optarg, &p, 0);
if (*p != '\0'
|| wtime <= 0)
usage();
break;
case 'r':
not_trace = 1;
if (rflag)
usage();
rflag = getnet(optarg, &OMSG.rip_nets[0]);
if (!rflag) {
struct hostent *hp = gethostbyname(optarg);
if (hp == 0) {
fprintf(stderr, "%s: %s:",
pgmname, optarg);
herror(0);
exit(1);
}
memcpy(&OMSG.rip_nets[0].n_dst, hp->h_addr,
sizeof(OMSG.rip_nets[0].n_dst));
OMSG.rip_nets[0].n_family = RIP_AF_INET;
OMSG.rip_nets[0].n_mask = -1;
rflag = 1;
}
break;
case 't':
trace = 1;
options = optarg;
while (*options != '\0') {
/* messy complications to make -W -Wall happy */
static char on_str[] = "on";
static char more_str[] = "more";
static char off_str[] = "off";
static char dump_str[] = "dump";
static char *traceopts[] = {
# define TRACE_ON 0
on_str,
# define TRACE_MORE 1
more_str,
# define TRACE_OFF 2
off_str,
# define TRACE_DUMP 3
dump_str,
0
};
result = "";
switch (getsubopt(&options,traceopts,&value)) {
case TRACE_ON:
OMSG.rip_cmd = RIPCMD_TRACEON;
if (!value
|| strlen(value) > MAXPATHLEN)
usage();
result = value;
break;
case TRACE_MORE:
if (value)
usage();
OMSG.rip_cmd = RIPCMD_TRACEON;
break;
case TRACE_OFF:
if (value)
usage();
OMSG.rip_cmd = RIPCMD_TRACEOFF;
break;
case TRACE_DUMP:
if (value)
usage();
OMSG.rip_cmd = RIPCMD_TRACEON;
result = "dump/../table";
break;
default:
usage();
}
strcpy((char*)OMSG.rip_tracefile, result);
omsg_len += strlen(result) - sizeof(OMSG.ripun);
}
break;
case 'a':
not_trace = 1;
p = strchr(optarg,'=');
if (!p)
usage();
*p++ = '\0';
if (!strcasecmp("passwd",optarg))
auth_type = RIP_AUTH_PW;
else if (!strcasecmp("md5_passwd",optarg))
auth_type = RIP_AUTH_MD5;
else
usage();
if (0 > parse_quote(&p,"|",&delim,
passwd, sizeof(passwd)))
usage();
if (auth_type == RIP_AUTH_MD5
&& delim == '|') {
keyid = strtoul(p+1,&p,0);
if (keyid > 255 || *p != '\0')
usage();
} else if (delim != '\0') {
usage();
}
break;
default:
usage();
}
argv += optind;
argc -= optind;
if (not_trace && trace)
usage();
if (argc == 0) {
argc = 1;
argv = default_argv;
}
soc = socket(AF_INET, SOCK_DGRAM, 0);
if (soc < 0) {
perror("socket");
exit(2);
}
/* be prepared to receive a lot of routes */
for (bsize = 127*1024; ; bsize -= 1024) {
if (setsockopt(soc, SOL_SOCKET, SO_RCVBUF,
&bsize, sizeof(bsize)) == 0)
break;
if (bsize <= 4*1024) {
perror("setsockopt SO_RCVBUF");
break;
}
}
if (trace)
trace_loop(argv);
else
query_loop(argv, argc);
/* NOTREACHED */
return 0;
}
static void
usage(void)
{
fprintf(stderr,
"usage: rtquery [-np1] [-r tgt_rt] [-w wtime]"
" [-a type=passwd] host1 [host2 ...]\n"
"\trtquery -t {on=filename|more|off|dump}"
" host1 [host2 ...]\n");
exit(1);
}
/* tell the target hosts about tracing
*/
static void
trace_loop(char *argv[])
{
struct sockaddr_in myaddr;
int res;
if (geteuid() != 0) {
(void)fprintf(stderr, "-t requires UID 0\n");
exit(1);
}
if (ripv2) {
OMSG.rip_vers = RIPv2;
} else {
OMSG.rip_vers = RIPv1;
}
memset(&myaddr, 0, sizeof(myaddr));
myaddr.sin_family = AF_INET;
#ifdef _HAVE_SIN_LEN
myaddr.sin_len = sizeof(myaddr);
#endif
myaddr.sin_port = htons(IPPORT_RESERVED-1);
while (bind(soc, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
if (errno != EADDRINUSE
|| myaddr.sin_port == 0) {
perror("bind");
exit(2);
}
myaddr.sin_port = htons(ntohs(myaddr.sin_port)-1);
}
res = 1;
while (*argv != 0) {
if (out(*argv++) <= 0)
res = 0;
}
exit(res);
}
/* query all of the listed hosts
*/
static void
query_loop(char *argv[], int argc)
{
# define NA0 (OMSG.rip_auths[0])
# define NA2 (OMSG.rip_auths[2])
struct seen {
struct seen *next;
struct in_addr addr;
} *seen, *sp;
int answered = 0;
int cc;
fd_set bits;
struct timeval now, delay;
struct sockaddr_in from;
int fromlen;
MD5_CTX md5_ctx;
OMSG.rip_cmd = (pflag) ? RIPCMD_POLL : RIPCMD_REQUEST;
if (ripv2) {
OMSG.rip_vers = RIPv2;
if (auth_type == RIP_AUTH_PW) {
OMSG.rip_nets[1] = OMSG.rip_nets[0];
NA0.a_family = RIP_AF_AUTH;
NA0.a_type = RIP_AUTH_PW;
memcpy(NA0.au.au_pw, passwd, RIP_AUTH_PW_LEN);
omsg_len += sizeof(OMSG.rip_nets[0]);
} else if (auth_type == RIP_AUTH_MD5) {
OMSG.rip_nets[1] = OMSG.rip_nets[0];
NA0.a_family = RIP_AF_AUTH;
NA0.a_type = RIP_AUTH_MD5;
NA0.au.a_md5.md5_keyid = (int8_t)keyid;
NA0.au.a_md5.md5_auth_len = RIP_AUTH_MD5_LEN;
NA0.au.a_md5.md5_seqno = 0;
cc = (char *)&NA2-(char *)&OMSG;
NA0.au.a_md5.md5_pkt_len = htons(cc);
NA2.a_family = RIP_AF_AUTH;
NA2.a_type = htons(1);
MD5Init(&md5_ctx);
MD5Update(&md5_ctx,
(u_char *)&OMSG, cc);
MD5Update(&md5_ctx,
(u_char *)passwd, RIP_AUTH_MD5_LEN);
MD5Final(NA2.au.au_pw, &md5_ctx);
omsg_len += 2*sizeof(OMSG.rip_nets[0]);
}
} else {
OMSG.rip_vers = RIPv1;
OMSG.rip_nets[0].n_mask = 0;
}
/* ask the first (valid) host */
seen = 0;
while (0 > out(*argv++)) {
if (*argv == 0)
exit(-1);
answered++;
}
FD_ZERO(&bits);
for (;;) {
FD_SET(soc, &bits);
delay.tv_sec = 0;
delay.tv_usec = STIME;
cc = select(soc+1, &bits, 0,0, &delay);
if (cc > 0) {
fromlen = sizeof(from);
cc = recvfrom(soc, imsg_buf.packet,
sizeof(imsg_buf.packet), 0,
(struct sockaddr *)&from, &fromlen);
if (cc < 0) {
perror("recvfrom");
exit(1);
}
/* count the distinct responding hosts.
* You cannot match responding hosts with
* addresses to which queries were transmitted,
* because a router might respond with a
* different source address.
*/
for (sp = seen; sp != 0; sp = sp->next) {
if (sp->addr.s_addr == from.sin_addr.s_addr)
break;
}
if (sp == 0) {
sp = malloc(sizeof(*sp));
if (sp == 0) {
fprintf(stderr,
"rtquery: malloc failed\n");
exit(1);
}
sp->addr = from.sin_addr;
sp->next = seen;
seen = sp;
answered++;
}
rip_input(&from, cc);
continue;
}
if (cc < 0) {
if (errno == EINTR)
continue;
perror("select");
exit(1);
}
/* After a pause in responses, probe another host.
* This reduces the intermingling of answers.
*/
while (*argv != 0 && 0 > out(*argv++))
answered++;
/* continue until no more packets arrive
* or we have heard from all hosts
*/
if (answered >= argc)
break;
/* or until we have waited a long time
*/
if (gettimeofday(&now, 0) < 0) {
perror("gettimeofday(now)");
exit(1);
}
if (sent.tv_sec + wtime <= now.tv_sec)
break;
}
/* fail if there was no answer */
exit (answered >= argc ? 0 : 1);
}
/* send to one host
*/
static int
out(const char *host)
{
struct sockaddr_in router;
struct hostent *hp;
if (gettimeofday(&sent, 0) < 0) {
perror("gettimeofday(sent)");
return -1;
}
memset(&router, 0, sizeof(router));
router.sin_family = AF_INET;
#ifdef _HAVE_SIN_LEN
router.sin_len = sizeof(router);
#endif
if (!inet_aton(host, &router.sin_addr)) {
hp = gethostbyname(host);
if (hp == 0) {
herror(host);
return -1;
}
memcpy(&router.sin_addr, hp->h_addr, sizeof(router.sin_addr));
}
router.sin_port = htons(RIP_PORT);
if (sendto(soc, &omsg_buf, omsg_len, 0,
(struct sockaddr *)&router, sizeof(router)) < 0) {
perror(host);
return -1;
}
return 0;
}
/*
* Convert string to printable characters
*/
static char *
qstring(u_char *s, int len)
{
static char buf[8*20+1];
char *p;
u_char *s2, c;
for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
c = *s++;
if (c == '\0') {
for (s2 = s+1; s2 < &s[len]; s2++) {
if (*s2 != '\0')
break;
}
if (s2 >= &s[len])
goto exit;
}
if (c >= ' ' && c < 0x7f && c != '\\') {
*p++ = c;
continue;
}
*p++ = '\\';
switch (c) {
case '\\':
*p++ = '\\';
break;
case '\n':
*p++= 'n';
break;
case '\r':
*p++= 'r';
break;
case '\t':
*p++ = 't';
break;
case '\b':
*p++ = 'b';
break;
default:
p += sprintf(p,"%o",c);
break;
}
}
exit:
*p = '\0';
return buf;
}
/*
* Handle an incoming RIP packet.
*/
static void
rip_input(struct sockaddr_in *from,
int size)
{
struct netinfo *n, *lim;
struct in_addr in;
const char *name;
char net_buf[80];
u_char hash[RIP_AUTH_MD5_LEN];
MD5_CTX md5_ctx;
u_char md5_authed = 0;
u_int mask, dmask;
char *sp;
int i;
struct hostent *hp;
struct netent *np;
struct netauth *na;
if (nflag) {
printf("%s:", inet_ntoa(from->sin_addr));
} else {
hp = gethostbyaddr((char*)&from->sin_addr,
sizeof(struct in_addr), AF_INET);
if (hp == 0) {
printf("%s:",
inet_ntoa(from->sin_addr));
} else {
printf("%s (%s):", hp->h_name,
inet_ntoa(from->sin_addr));
}
}
if (IMSG.rip_cmd != RIPCMD_RESPONSE) {
printf("\n unexpected response type %d\n", IMSG.rip_cmd);
return;
}
printf(" RIPv%d%s %d bytes\n", IMSG.rip_vers,
(IMSG.rip_vers != RIPv1 && IMSG.rip_vers != RIPv2) ? " ?" : "",
size);
if (size > MAXPACKETSIZE) {
if (size > (int)sizeof(imsg_buf) - (int)sizeof(*n)) {
printf(" at least %d bytes too long\n",
size-MAXPACKETSIZE);
size = (int)sizeof(imsg_buf) - (int)sizeof(*n);
} else {
printf(" %d bytes too long\n",
size-MAXPACKETSIZE);
}
} else if (size%sizeof(*n) != sizeof(struct rip)%sizeof(*n)) {
printf(" response of bad length=%d\n", size);
}
n = IMSG.rip_nets;
lim = (struct netinfo *)((char*)n + size) - 1;
for (; n <= lim; n++) {
name = "";
if (n->n_family == RIP_AF_INET) {
in.s_addr = n->n_dst;
(void)strcpy(net_buf, inet_ntoa(in));
mask = ntohl(n->n_mask);
dmask = mask & -mask;
if (mask != 0) {
sp = &net_buf[strlen(net_buf)];
if (IMSG.rip_vers == RIPv1) {
(void)sprintf(sp," mask=%#x ? ",mask);
mask = 0;
} else if (mask + dmask == 0) {
for (i = 0;
(i != 32
&& ((1<<i)&mask) == 0);
i++)
continue;
(void)sprintf(sp, "/%d",32-i);
} else {
(void)sprintf(sp," (mask %#x)", mask);
}
}
if (!nflag) {
if (mask == 0) {
mask = std_mask(in.s_addr);
if ((ntohl(in.s_addr) & ~mask) != 0)
mask = 0;
}
/* Without a netmask, do not worry about
* whether the destination is a host or a
* network. Try both and use the first name
* we get.
*
* If we have a netmask we can make a
* good guess.
*/
if ((in.s_addr & ~mask) == 0) {
np = getnetbyaddr((long)in.s_addr,
AF_INET);
if (np != 0)
name = np->n_name;
else if (in.s_addr == 0)
name = "default";
}
if (name[0] == '\0'
&& ((in.s_addr & ~mask) != 0
|| mask == 0xffffffff)) {
hp = gethostbyaddr((char*)&in,
sizeof(in),
AF_INET);
if (hp != 0)
name = hp->h_name;
}
}
} else if (n->n_family == RIP_AF_AUTH) {
na = (struct netauth*)n;
if (na->a_type == RIP_AUTH_PW
&& n == IMSG.rip_nets) {
(void)printf(" Password Authentication:"
" \"%s\"\n",
qstring(na->au.au_pw,
RIP_AUTH_PW_LEN));
continue;
}
if (na->a_type == RIP_AUTH_MD5
&& n == IMSG.rip_nets) {
(void)printf(" MD5 Auth"
" len=%d KeyID=%d"
" auth_len=%d"
" seqno=%#x"
" rsvd=%#x,%#x\n",
ntohs(na->au.a_md5.md5_pkt_len),
na->au.a_md5.md5_keyid,
na->au.a_md5.md5_auth_len,
(int)ntohl(na->au.a_md5.md5_seqno),
na->au.a_md5.rsvd[0],
na->au.a_md5.rsvd[1]);
md5_authed = 1;
continue;
}
(void)printf(" Authentication type %d: ",
ntohs(na->a_type));
for (i = 0; i < (int)sizeof(na->au.au_pw); i++)
(void)printf("%02x ", na->au.au_pw[i]);
putc('\n', stdout);
if (md5_authed && n+1 > lim
&& na->a_type == ntohs(1)) {
MD5Init(&md5_ctx);
MD5Update(&md5_ctx, (u_char *)&IMSG,
(char *)na-(char *)&IMSG);
MD5Update(&md5_ctx, (u_char *)passwd,
RIP_AUTH_MD5_LEN);
MD5Final(hash, &md5_ctx);
(void)printf(" %s hash\n",
memcmp(hash, na->au.au_pw,
sizeof(hash))
? "WRONG" : "correct");
}
continue;
} else {
(void)sprintf(net_buf, "(af %#x) %d.%d.%d.%d",
ntohs(n->n_family),
(char)(n->n_dst >> 24),
(char)(n->n_dst >> 16),
(char)(n->n_dst >> 8),
(char)n->n_dst);
}
(void)printf(" %-18s metric %2d %-10s",
net_buf, (int)ntohl(n->n_metric), name);
if (n->n_nhop != 0) {
in.s_addr = n->n_nhop;
if (nflag)
hp = 0;
else
hp = gethostbyaddr((char*)&in, sizeof(in),
AF_INET);
(void)printf(" nhop=%-15s%s",
(hp != 0) ? hp->h_name : inet_ntoa(in),
(IMSG.rip_vers == RIPv1) ? " ?" : "");
}
if (n->n_tag != 0)
(void)printf(" tag=%#x%s", n->n_tag,
(IMSG.rip_vers == RIPv1) ? " ?" : "");
putc('\n', stdout);
}
}
/* Return the classical netmask for an IP address.
*/
static u_int
std_mask(u_int addr) /* in network order */
{
addr = ntohl(addr); /* was a host, not a network */
if (addr == 0) /* default route has mask 0 */
return 0;
if (IN_CLASSA(addr))
return IN_CLASSA_NET;
if (IN_CLASSB(addr))
return IN_CLASSB_NET;
return IN_CLASSC_NET;
}
/* get a network number as a name or a number, with an optional "/xx"
* netmask.
*/
static int /* 0=bad */
getnet(char *name,
struct netinfo *rt)
{
int i;
struct netent *nentp;
u_int mask;
struct in_addr in;
char hname[MAXHOSTNAMELEN+1];
char *mname, *p;
/* Detect and separate "1.2.3.4/24"
*/
if (0 != (mname = strrchr(name,'/'))) {
i = (int)(mname - name);
if (i > (int)sizeof(hname)-1) /* name too long */
return 0;
memmove(hname, name, i);
hname[i] = '\0';
mname++;
name = hname;
}
nentp = getnetbyname(name);
if (nentp != 0) {
in.s_addr = nentp->n_net;
} else if (inet_aton(name, &in) == 1) {
in.s_addr = ntohl(in.s_addr);
} else {
return 0;
}
if (mname == 0) {
mask = std_mask(in.s_addr);
if ((~mask & in.s_addr) != 0)
mask = 0xffffffff;
} else {
mask = (u_int)strtoul(mname, &p, 0);
if (*p != '\0' || mask > 32)
return 0;
mask = 0xffffffff << (32-mask);
}
rt->n_dst = htonl(in.s_addr);
rt->n_family = RIP_AF_INET;
rt->n_mask = htonl(mask);
return 1;
}
/* strtok(), but honoring backslash
*/
static int /* -1=bad */
parse_quote(char **linep,
const char *delims,
char *delimp,
char *buf,
int lim)
{
char c, *pc;
const char *p;
pc = *linep;
if (*pc == '\0')
return -1;
for (;;) {
if (lim == 0)
return -1;
c = *pc++;
if (c == '\0')
break;
if (c == '\\' && *pc != '\0') {
if ((c = *pc++) == 'n') {
c = '\n';
} else if (c == 'r') {
c = '\r';
} else if (c == 't') {
c = '\t';
} else if (c == 'b') {
c = '\b';
} else if (c >= '0' && c <= '7') {
c -= '0';
if (*pc >= '0' && *pc <= '7') {
c = (c<<3)+(*pc++ - '0');
if (*pc >= '0' && *pc <= '7')
c = (c<<3)+(*pc++ - '0');
}
}
} else {
for (p = delims; *p != '\0'; ++p) {
if (*p == c)
goto exit;
}
}
*buf++ = c;
--lim;
}
exit:
if (delimp != 0)
*delimp = c;
*linep = pc-1;
if (lim != 0)
*buf = '\0';
return 0;
}