+/*-
+ * Copyright (c) 1982, 1986 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
+char copyright[] =
+"@(#) Copyright (c) 1982, 1986 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)query.c 5.13 (Berkeley) 4/16/91";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <netinet/in.h>
+#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>
+
+#define WTIME 5 /* Time to wait for all responses */
+#define STIME 500000 /* usec to wait for another response */
+
+int s;
+int timedout;
+void timeout();
+char packet[MAXPACKETSIZE];
+int nflag;
+
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ extern char *optarg;
+ extern int optind;
+ int ch, cc, count, bits;
+ struct sockaddr from;
+ int fromlen = sizeof(from), size = 32*1024;
+ struct timeval shorttime;
+
+ while ((ch = getopt(argc, argv, "n")) != EOF)
+ switch((char)ch) {
+ case 'n':
+ nflag++;
+ break;
+ case '?':
+ default:
+ goto usage;
+ }
+ argv += optind;
+
+ if (!*argv) {
+usage: printf("usage: query [-n] hosts...\n");
+ exit(1);
+ }
+
+ s = socket(AF_INET, SOCK_DGRAM, 0);
+ if (s < 0) {
+ perror("socket");
+ exit(2);
+ }
+ if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)) < 0)
+ perror("setsockopt SO_RCVBUF");
+
+ while (*argv) {
+ query(*argv++);
+ count++;
+ }
+
+ /*
+ * Listen for returning packets;
+ * may be more than one packet per host.
+ */
+ bits = 1 << s;
+ bzero(&shorttime, sizeof(shorttime));
+ shorttime.tv_usec = STIME;
+ signal(SIGALRM, timeout);
+ alarm(WTIME);
+ while ((count > 0 && !timedout) ||
+ select(20, (fd_set *)&bits, NULL, NULL, &shorttime) > 0) {
+ cc = recvfrom(s, packet, sizeof (packet), 0,
+ &from, &fromlen);
+ if (cc <= 0) {
+ if (cc < 0) {
+ if (errno == EINTR)
+ continue;
+ perror("recvfrom");
+ (void) close(s);
+ exit(1);
+ }
+ continue;
+ }
+ rip_input(&from, cc);
+ count--;
+ }
+ exit (count > 0 ? count : 0);
+}
+
+query(host)
+ char *host;
+{
+ struct sockaddr_in router;
+ register struct rip *msg = (struct rip *)packet;
+ struct hostent *hp;
+ struct servent *sp;
+
+ bzero((char *)&router, sizeof (router));
+ router.sin_family = AF_INET;
+ router.sin_addr.s_addr = inet_addr(host);
+ if (router.sin_addr.s_addr == -1) {
+ hp = gethostbyname(host);
+ if (hp == NULL) {
+ fprintf(stderr, "query: %s: ", host);
+ herror((char *)NULL);
+ exit(1);
+ }
+ bcopy(hp->h_addr, &router.sin_addr, hp->h_length);
+ }
+ sp = getservbyname("router", "udp");
+ if (sp == 0) {
+ printf("udp/router: service unknown\n");
+ exit(1);
+ }
+ router.sin_port = sp->s_port;
+ msg->rip_cmd = RIPCMD_REQUEST;
+ msg->rip_vers = RIPVERSION;
+ msg->rip_nets[0].rip_dst.sa_family = htons(AF_UNSPEC);
+ msg->rip_nets[0].rip_metric = htonl(HOPCNT_INFINITY);
+ if (sendto(s, packet, sizeof (struct rip), 0,
+ (struct sockaddr *)&router, sizeof(router)) < 0)
+ perror(host);
+}
+
+/*
+ * Handle an incoming routing packet.
+ */
+rip_input(from, size)
+ struct sockaddr_in *from;
+ int size;
+{
+ register struct rip *msg = (struct rip *)packet;
+ register struct netinfo *n;
+ char *name;
+ int lna, net, subnet;
+ struct hostent *hp;
+ struct netent *np;
+
+ if (msg->rip_cmd != RIPCMD_RESPONSE)
+ return;
+ printf("%d bytes from ", size);
+ if (nflag)
+ printf("%s:\n", inet_ntoa(from->sin_addr));
+ else {
+ hp = gethostbyaddr((char *)&from->sin_addr,
+ sizeof (struct in_addr), AF_INET);
+ name = hp == 0 ? "???" : hp->h_name;
+ printf("%s(%s):\n", name, inet_ntoa(from->sin_addr));
+ }
+ size -= sizeof (int);
+ n = msg->rip_nets;
+ while (size > 0) {
+ if (size < sizeof (struct netinfo))
+ break;
+ if (msg->rip_vers > 0) {
+ n->rip_dst.sa_family =
+ ntohs(n->rip_dst.sa_family);
+ n->rip_metric = ntohl(n->rip_metric);
+ }
+ switch (n->rip_dst.sa_family) {
+
+ case AF_INET:
+ { register struct sockaddr_in *sin;
+
+ sin = (struct sockaddr_in *)&n->rip_dst;
+ net = inet_netof(sin->sin_addr);
+ subnet = inet_subnetof(sin->sin_addr);
+ lna = inet_lnaof(sin->sin_addr);
+ name = "???";
+ if (!nflag) {
+ if (sin->sin_addr.s_addr == 0)
+ name = "default";
+ else if (lna == INADDR_ANY) {
+ np = getnetbyaddr(net, AF_INET);
+ if (np)
+ name = np->n_name;
+ else if (net == 0)
+ name = "default";
+ } else if ((lna & 0xff) == 0 &&
+ (np = getnetbyaddr(subnet, AF_INET))) {
+ struct in_addr subnaddr, inet_makeaddr();
+
+ subnaddr = inet_makeaddr(subnet, INADDR_ANY);
+ if (bcmp(&sin->sin_addr, &subnaddr,
+ sizeof(subnaddr)) == 0)
+ name = np->n_name;
+ else
+ goto host;
+ } else {
+ host:
+ hp = gethostbyaddr((char *)&sin->sin_addr,
+ sizeof (struct in_addr), AF_INET);
+ if (hp)
+ name = hp->h_name;
+ }
+ printf("\t%-17s metric %2d name %s\n",
+ inet_ntoa(sin->sin_addr), n->rip_metric, name);
+ } else
+ printf("\t%-17s metric %2d\n",
+ inet_ntoa(sin->sin_addr), n->rip_metric);
+ break;
+ }
+
+ default:
+ { u_short *p = (u_short *)n->rip_dst.sa_data;
+
+ printf("\t(af %d) %x %x %x %x %x %x %x, metric %d\n",
+ p[0], p[1], p[2], p[3], p[4], p[5], p[6],
+ n->rip_dst.sa_family,
+ n->rip_metric);
+ break;
+ }
+
+ }
+ size -= sizeof (struct netinfo), n++;
+ }
+}
+
+void
+timeout()
+{
+ timedout = 1;
+}
+
+/*
+ * Return the possible subnetwork number from an internet address.
+ * SHOULD FIND OUT WHETHER THIS IS A LOCAL NETWORK BEFORE LOOKING
+ * INSIDE OF THE HOST PART. We can only believe this if we have other
+ * information (e.g., we can find a name for this number).
+ */
+inet_subnetof(in)
+ struct in_addr in;
+{
+ register u_long i = ntohl(in.s_addr);
+
+ if (IN_CLASSA(i))
+ return ((i & IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
+ else if (IN_CLASSB(i))
+ return ((i & IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
+ else
+ return ((i & 0xffffffc0) >> 28);
+}
projects / unix-history / commitdiff