mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-19 01:11:05 +01:00
460 lines
9.0 KiB
C
460 lines
9.0 KiB
C
#include <netdb.h>
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#include <sys/time.h>
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#include "defs.h"
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#define DEFAULT_TIMEOUT 10 /* How long to wait before retrying requests */
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int timeout = DEFAULT_TIMEOUT;
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vifi_t numvifs; /* to keep loader happy */
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/* (see COPY_TABLES macro called in kern.c) */
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char *
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inet_name(addr)
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u_long addr;
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{
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struct hostent *e;
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e = gethostbyaddr(&addr, sizeof(addr), AF_INET);
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return e ? e->h_name : "?";
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}
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u_long
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host_addr(name)
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char *name;
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{
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struct hostent *e = gethostbyname(name);
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int addr;
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if (e)
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memcpy(&addr, e->h_addr_list[0], e->h_length);
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else {
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addr = inet_addr(name);
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if (addr == -1)
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addr = 0;
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}
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return addr;
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}
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char *
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proto_type(type)
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u_char type;
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{
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switch (type) {
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case PROTO_DVMRP:
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return ("PROTO_DVMRP");
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case PROTO_MOSPF:
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return ("PROTO_MOSPF");
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case PROTO_PIM:
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return ("PROTO_PIM");
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case PROTO_CBT:
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return ("PROTO_CBT");
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default:
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return ("PROTO_UNKNOWN");
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}
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}
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char *
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flag_type(type)
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u_char type;
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{
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switch (type) {
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case TR_NO_ERR:
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return ("NO_ERR");
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case TR_WRONG_IF:
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return ("WRONG_IF");
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case TR_PRUNED:
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return ("PRUNED");
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case TR_SCOPED:
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return ("SCOPED");
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case TR_NO_RTE:
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return ("NO_RTE");
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default:
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return ("INVALID ERR");
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}
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}
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int
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t_diff(a_sec, a_usec, b_sec, b_usec)
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u_long a_sec, a_usec, b_sec, b_usec;
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{
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int d = a_sec - b_sec;
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int ms = a_usec - b_usec;
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if ((d < 0) ||
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((d == 0) && (ms < 0))) {
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d = b_sec - a_sec;
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ms = b_usec - a_usec;
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}
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switch (d) {
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case 0:
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break;
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case 2:
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ms += 1000000;
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case 1:
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ms += 1000000;
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break;
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default:
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ms += (1000000) * d;
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}
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return (ms/1000);
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}
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct timeval tq;
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struct timezone tzp;
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u_long resptime;
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int udp;
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struct sockaddr_in addr;
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int addrlen = sizeof(addr);
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u_long lcl_addr = 0; /* in NET order */
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u_long qid = ((u_long)random() >> 8);
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u_long qsrc = NULL;
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u_long qgrp = NULL;
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u_long qdst = NULL;
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u_char qno = 0;
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u_long raddr = NULL;
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u_char qttl = 1;
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u_char rttl = 1;
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u_long dst = NULL;
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struct tr_query *query;
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struct tr_rlist *tr_rlist = NULL;
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char *p;
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int datalen = 0;
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int i;
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int done = 0;
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argv++, argc--;
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while (argc > 0 && *argv[0] == '-') {
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switch (argv[0][1]) {
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case 's':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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qsrc = host_addr(argv[0]);
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break;
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} else
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goto usage;
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case 'g':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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qgrp = host_addr(argv[0]);
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break;
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} else
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goto usage;
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case 'd':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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qdst = host_addr(argv[0]);
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break;
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} else
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goto usage;
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case 'x':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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dst = host_addr(argv[0]);
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break;
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} else
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goto usage;
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case 't':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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qttl = atoi(argv[0]);
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if (qttl < 1)
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qttl = 1;
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break;
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} else
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goto usage;
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case 'n':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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qno = atoi(argv[0]);
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break;
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} else
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goto usage;
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case 'l':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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rttl = atoi(argv[0]);
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break;
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} else
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goto usage;
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case 'r':
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if (argc > 1 && isdigit(*(argv + 1)[0])) {
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argv++, argc--;
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raddr = host_addr(argv[0]);
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break;
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} else
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goto usage;
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default:
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goto usage;
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}
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argv++, argc--;
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}
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if (argc > 0) {
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usage: printf("usage: mtrace -s <src> -g <grp> -d <dst> -n <# reports> \n");
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printf(" -t <ttl> [-x <qdst>] [-r <rdst>] [-l <rttl>]\n");
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exit(1);
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}
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printf("Mtrace src %s grp %s dst %s #%d\n", inet_fmt(qsrc, s1),
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inet_fmt(qgrp, s2), inet_fmt(qdst, s3), qno);
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printf(" resp ttl %d resp addr %s\n", rttl, inet_fmt(raddr, s1));
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init_igmp();
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/* Obtain the local address from which to send out packets */
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = qgrp;
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addr.sin_port = htons(2000);
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if (((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0) ||
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(connect(udp, (struct sockaddr *) &addr, sizeof(addr)) < 0) ||
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getsockname(udp, (struct sockaddr *) &addr, &addrlen) < 0) {
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perror("Determining local address");
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exit(-1);
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}
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close(udp);
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lcl_addr = addr.sin_addr.s_addr;
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/* Got the local address now */
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/* Now, make up the IGMP packet to send */
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query = (struct tr_query *)(send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
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query->tr_src = qsrc;
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query->tr_dst = qdst;
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query->tr_qid = qid;
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if (raddr)
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query->tr_raddr = raddr;
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else
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query->tr_raddr = lcl_addr;
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query->tr_rttl = rttl;
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datalen += sizeof(struct tr_query);
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if (IN_MULTICAST(ntohl(qgrp)))
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k_set_ttl(qttl);
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else
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k_set_ttl(1);
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if (dst == NULL)
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dst = qgrp;
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/*
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* set timer to calculate delays & send query
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*/
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gettimeofday(&tq, &tzp);
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send_igmp(lcl_addr, dst, IGMP_MTRACE, qno,
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qgrp, datalen);
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/*
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* If the response is to be a multicast address, make sure we
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* are listening on that multicast address.
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*/
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if (IN_MULTICAST(ntohl(raddr)))
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k_join(raddr, lcl_addr);
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/* Wait for our reply now */
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while (!done) {
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fd_set fds;
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struct timeval tv;
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struct timezone tzp;
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int count, recvlen, dummy = 0;
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register u_long src, dst, group, smask;
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struct ip *ip;
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struct igmp *igmp;
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struct tr_resp *resp;
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int ipdatalen, iphdrlen, igmpdatalen;
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int rno;
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FD_ZERO(&fds);
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FD_SET(igmp_socket, &fds);
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/* need to input timeout as optional argument */
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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count = select(igmp_socket + 1, &fds, 0, 0, &tv);
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if (count < 0) {
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if (errno != EINTR)
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perror("select");
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continue;
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} else if (count == 0) {
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printf("Timed out receiving responses\n");
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exit(1);
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}
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recvlen = recvfrom(igmp_socket, recv_buf, sizeof(recv_buf),
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0, NULL, &dummy);
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if (recvlen <= 0) {
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if (recvlen && errno != EINTR)
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perror("recvfrom");
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continue;
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}
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if (recvlen < sizeof(struct ip)) {
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log(LOG_WARNING, 0,
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"packet too short (%u bytes) for IP header",
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recvlen);
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continue;
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}
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ip = (struct ip *) recv_buf;
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iphdrlen = ip->ip_hl << 2;
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ipdatalen = ip->ip_len;
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if (iphdrlen + ipdatalen != recvlen) {
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printf("packet shorter (%u bytes) than hdr+data length (%u+%u)\n",
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recvlen, iphdrlen, ipdatalen);
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continue;
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}
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igmp = (struct igmp *) (recv_buf + iphdrlen);
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group = igmp->igmp_group.s_addr;
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igmpdatalen = ipdatalen - IGMP_MINLEN;
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if (igmpdatalen < 0) {
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printf("IP data field too short (%u bytes) for IGMP, from %s\n",
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ipdatalen, inet_fmt(src, s1));
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continue;
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}
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if (igmp->igmp_type != IGMP_MTRACE &&
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igmp->igmp_type != IGMP_MTRACE_RESP)
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continue;
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if (igmpdatalen == QLEN)
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continue;
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if ((igmpdatalen - QLEN)%RLEN) {
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printf("packet with incorrect datalen\n");
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continue;
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}
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query = (struct tr_query *)(igmp + 1);
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/* If this is query with a different id, ignore! */
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if (query->tr_qid != qid)
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continue;
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/*
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* Most of the sanity checking done at this point.
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* This is the packet we have been waiting for all this time
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*/
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resp = (struct tr_resp *)(query + 1);
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rno = (igmpdatalen - QLEN)/RLEN;
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/*
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* print the responses out in reverse order (from src to dst)
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*/
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printf("src: <%s> grp: <%s> dst: <%s>\n\n", inet_fmt(qsrc, s1),
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inet_fmt(qgrp, s2), inet_fmt(qdst, s3));
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VAL_TO_MASK(smask, (resp+rno-1)->tr_smask);
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if (((resp+rno-1)->tr_inaddr & smask) == (qsrc & smask))
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printf(" %-15s \n", inet_fmt(qsrc, s1));
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else
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printf(" * * *\n");
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resptime = 0;
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while (rno--) {
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struct tr_resp *r = resp + rno;
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printf(" | \n");
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printf(" %-15s ", inet_fmt(r->tr_inaddr, s1));
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printf("ttl %d ", r->tr_fttl);
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printf("cum: %d ms ",
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t_diff(r->tr_qarr >> 16, (r->tr_qarr & 0xffff) << 4,
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tq.tv_sec & 0xffff, tq.tv_usec));
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printf("hop: %d ms ",
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t_diff(resptime >> 16, (resptime & 0xffff) << 4,
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r->tr_qarr >> 16, (r->tr_qarr & 0xffff) << 4));
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printf("%s ", proto_type(r->tr_rproto));
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printf("%s\n", flag_type(r->tr_rflags));
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printf(" %-15s ", inet_fmt(r->tr_outaddr, s1));
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printf("v_in: %ld ", r->tr_vifin);
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printf("v_out: %ld ", r->tr_vifout);
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printf("pkts: %ld\n", r->tr_pktcnt);
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resptime = r->tr_qarr;
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}
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printf(" | \n");
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printf(" %-15s \n", inet_fmt(qdst, s1));
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/*
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* if the response was multicast back, leave the group
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*/
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if (IN_MULTICAST(ntohl(raddr)))
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k_leave(raddr, lcl_addr);
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/* If I don't expect any more replies, exit here */
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exit(0);
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}
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}
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/* dummies */
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void log()
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{
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}
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void accept_probe()
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{
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}
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void accept_group_report()
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{
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}
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void accept_neighbors()
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{
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}
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void accept_neighbors2()
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{
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}
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void accept_neighbor_request2()
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{
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}
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void accept_report()
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{
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}
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void accept_neighbor_request()
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{
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}
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void accept_prune()
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{
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}
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void accept_graft()
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{
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}
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void accept_g_ack()
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{
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}
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void add_table_entry()
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{
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}
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void check_vif_state()
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{
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}
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void mtrace()
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{
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}
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void leave_group_message()
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{
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}
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