mirror of
https://git.rtems.org/rtems-libbsd/
synced 2025-05-14 10:47:58 +08:00
8440506ee8
- Update the file builder generator to handle generator specific cflags and includes. The tcpdump and libpcap have localised headers and need specific headers paths to see them. There are also module specific flags and these need to be passed to the lex and yacc generators. - Add the tcpdump support.
372 lines
8.1 KiB
C
372 lines
8.1 KiB
C
#include <machine/rtems-bsd-user-space.h>
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/*
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* Copyright (c) 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-dvmrp.c,v 1.27 2003-11-19 09:42:04 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "interface.h"
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#include "extract.h"
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#include "addrtoname.h"
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/*
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* DVMRP message types and flag values shamelessly stolen from
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* mrouted/dvmrp.h.
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*/
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#define DVMRP_PROBE 1 /* for finding neighbors */
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#define DVMRP_REPORT 2 /* for reporting some or all routes */
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#define DVMRP_ASK_NEIGHBORS 3 /* sent by mapper, asking for a list */
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/* of this router's neighbors */
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#define DVMRP_NEIGHBORS 4 /* response to such a request */
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#define DVMRP_ASK_NEIGHBORS2 5 /* as above, want new format reply */
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#define DVMRP_NEIGHBORS2 6
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#define DVMRP_PRUNE 7 /* prune message */
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#define DVMRP_GRAFT 8 /* graft message */
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#define DVMRP_GRAFT_ACK 9 /* graft acknowledgement */
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/*
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* 'flags' byte values in DVMRP_NEIGHBORS2 reply.
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*/
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#define DVMRP_NF_TUNNEL 0x01 /* neighbors reached via tunnel */
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#define DVMRP_NF_SRCRT 0x02 /* tunnel uses IP source routing */
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#define DVMRP_NF_DOWN 0x10 /* kernel state of interface */
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#define DVMRP_NF_DISABLED 0x20 /* administratively disabled */
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#define DVMRP_NF_QUERIER 0x40 /* I am the subnet's querier */
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static int print_probe(const u_char *, const u_char *, u_int);
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static int print_report(const u_char *, const u_char *, u_int);
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static int print_neighbors(const u_char *, const u_char *, u_int);
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static int print_neighbors2(const u_char *, const u_char *, u_int);
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static int print_prune(const u_char *);
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static int print_graft(const u_char *);
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static int print_graft_ack(const u_char *);
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static u_int32_t target_level;
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void
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dvmrp_print(register const u_char *bp, register u_int len)
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{
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register const u_char *ep;
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register u_char type;
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ep = (const u_char *)snapend;
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if (bp >= ep)
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return;
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TCHECK(bp[1]);
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type = bp[1];
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/* Skip IGMP header */
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bp += 8;
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len -= 8;
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switch (type) {
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case DVMRP_PROBE:
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printf(" Probe");
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if (vflag) {
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if (print_probe(bp, ep, len) < 0)
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goto trunc;
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}
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break;
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case DVMRP_REPORT:
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printf(" Report");
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if (vflag > 1) {
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if (print_report(bp, ep, len) < 0)
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goto trunc;
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}
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break;
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case DVMRP_ASK_NEIGHBORS:
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printf(" Ask-neighbors(old)");
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break;
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case DVMRP_NEIGHBORS:
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printf(" Neighbors(old)");
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if (print_neighbors(bp, ep, len) < 0)
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goto trunc;
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break;
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case DVMRP_ASK_NEIGHBORS2:
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printf(" Ask-neighbors2");
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break;
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case DVMRP_NEIGHBORS2:
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printf(" Neighbors2");
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/*
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* extract version and capabilities from IGMP group
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* address field
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*/
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bp -= 4;
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TCHECK2(bp[0], 4);
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target_level = (bp[0] << 24) | (bp[1] << 16) |
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(bp[2] << 8) | bp[3];
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bp += 4;
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if (print_neighbors2(bp, ep, len) < 0)
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goto trunc;
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break;
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case DVMRP_PRUNE:
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printf(" Prune");
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if (print_prune(bp) < 0)
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goto trunc;
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break;
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case DVMRP_GRAFT:
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printf(" Graft");
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if (print_graft(bp) < 0)
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goto trunc;
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break;
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case DVMRP_GRAFT_ACK:
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printf(" Graft-ACK");
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if (print_graft_ack(bp) < 0)
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goto trunc;
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break;
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default:
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printf(" [type %d]", type);
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break;
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}
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return;
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trunc:
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printf("[|dvmrp]");
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return;
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}
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static int
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print_report(register const u_char *bp, register const u_char *ep,
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register u_int len)
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{
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register u_int32_t mask, origin;
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register int metric, done;
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register u_int i, width;
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while (len > 0) {
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if (len < 3) {
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printf(" [|]");
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return (0);
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}
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TCHECK2(bp[0], 3);
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mask = (u_int32_t)0xff << 24 | bp[0] << 16 | bp[1] << 8 | bp[2];
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width = 1;
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if (bp[0])
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width = 2;
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if (bp[1])
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width = 3;
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if (bp[2])
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width = 4;
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printf("\n\tMask %s", intoa(htonl(mask)));
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bp += 3;
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len -= 3;
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do {
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if (bp + width + 1 > ep) {
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printf(" [|]");
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return (0);
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}
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if (len < width + 1) {
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printf("\n\t [Truncated Report]");
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return (0);
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}
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origin = 0;
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for (i = 0; i < width; ++i) {
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TCHECK(*bp);
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origin = origin << 8 | *bp++;
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}
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for ( ; i < 4; ++i)
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origin <<= 8;
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TCHECK(*bp);
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metric = *bp++;
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done = metric & 0x80;
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metric &= 0x7f;
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printf("\n\t %s metric %d", intoa(htonl(origin)),
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metric);
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len -= width + 1;
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} while (!done);
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}
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_probe(register const u_char *bp, register const u_char *ep,
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register u_int len)
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{
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register u_int32_t genid;
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TCHECK2(bp[0], 4);
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if ((len < 4) || ((bp + 4) > ep)) {
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/* { (ctags) */
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printf(" [|}");
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return (0);
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}
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genid = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3];
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bp += 4;
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len -= 4;
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if (vflag > 1)
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printf("\n\t");
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else
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printf(" ");
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printf("genid %u", genid);
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if (vflag < 2)
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return (0);
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while ((len > 0) && (bp < ep)) {
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TCHECK2(bp[0], 4);
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printf("\n\tneighbor %s", ipaddr_string(bp));
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bp += 4; len -= 4;
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}
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_neighbors(register const u_char *bp, register const u_char *ep,
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register u_int len)
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{
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const u_char *laddr;
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register u_char metric;
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register u_char thresh;
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register int ncount;
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while (len > 0 && bp < ep) {
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TCHECK2(bp[0], 7);
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laddr = bp;
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bp += 4;
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metric = *bp++;
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thresh = *bp++;
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ncount = *bp++;
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len -= 7;
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while (--ncount >= 0) {
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TCHECK2(bp[0], 4);
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printf(" [%s ->", ipaddr_string(laddr));
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printf(" %s, (%d/%d)]",
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ipaddr_string(bp), metric, thresh);
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bp += 4;
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len -= 4;
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}
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}
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_neighbors2(register const u_char *bp, register const u_char *ep,
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register u_int len)
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{
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const u_char *laddr;
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register u_char metric, thresh, flags;
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register int ncount;
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printf(" (v %d.%d):",
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(int)target_level & 0xff,
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(int)(target_level >> 8) & 0xff);
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while (len > 0 && bp < ep) {
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TCHECK2(bp[0], 8);
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laddr = bp;
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bp += 4;
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metric = *bp++;
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thresh = *bp++;
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flags = *bp++;
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ncount = *bp++;
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len -= 8;
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while (--ncount >= 0 && (len >= 4) && (bp + 4) <= ep) {
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printf(" [%s -> ", ipaddr_string(laddr));
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printf("%s (%d/%d", ipaddr_string(bp),
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metric, thresh);
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if (flags & DVMRP_NF_TUNNEL)
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printf("/tunnel");
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if (flags & DVMRP_NF_SRCRT)
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printf("/srcrt");
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if (flags & DVMRP_NF_QUERIER)
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printf("/querier");
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if (flags & DVMRP_NF_DISABLED)
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printf("/disabled");
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if (flags & DVMRP_NF_DOWN)
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printf("/down");
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printf(")]");
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bp += 4;
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len -= 4;
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}
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if (ncount != -1) {
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printf(" [|]");
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return (0);
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}
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}
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_prune(register const u_char *bp)
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{
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TCHECK2(bp[0], 12);
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printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
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bp += 8;
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(void)printf(" timer ");
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relts_print(EXTRACT_32BITS(bp));
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_graft(register const u_char *bp)
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{
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TCHECK2(bp[0], 8);
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printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
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return (0);
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trunc:
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return (-1);
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}
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static int
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print_graft_ack(register const u_char *bp)
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{
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TCHECK2(bp[0], 8);
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printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
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return (0);
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trunc:
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return (-1);
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}
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