mcr | f555c16 | 1999-10-07 23:47:09 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1996 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that: (1) source code distributions |
| 7 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| 8 | * distributions including binary code include the above copyright notice and |
| 9 | * this paragraph in its entirety in the documentation or other materials |
| 10 | * provided with the distribution, and (3) all advertising materials mentioning |
| 11 | * features or use of this software display the following acknowledgement: |
| 12 | * ``This product includes software developed by the University of California, |
| 13 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| 14 | * the University nor the names of its contributors may be used to endorse |
| 15 | * or promote products derived from this software without specific prior |
| 16 | * written permission. |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static const char rcsid[] = |
| 24 | "@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.36 1999-10-07 23:47:12 mcr Exp $ (LBL)"; |
| 25 | #endif |
| 26 | |
| 27 | #include <sys/param.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <sys/socket.h> |
| 30 | |
| 31 | #include <netinet/in.h> |
| 32 | #include <netinet/in_systm.h> |
| 33 | #include <netinet/ip.h> |
| 34 | #include <netinet/ip_var.h> |
| 35 | #include <netinet/udp.h> |
| 36 | #include <netinet/udp_var.h> |
| 37 | |
| 38 | #include <stdio.h> |
| 39 | |
| 40 | #include "interface.h" |
| 41 | #include "addrtoname.h" |
| 42 | #include "extract.h" /* must come after interface.h */ |
| 43 | |
| 44 | struct rip { |
| 45 | u_char rip_cmd; /* request/response */ |
| 46 | u_char rip_vers; /* protocol version # */ |
| 47 | u_short rip_zero2; /* unused */ |
| 48 | }; |
| 49 | #define RIPCMD_REQUEST 1 /* want info */ |
| 50 | #define RIPCMD_RESPONSE 2 /* responding to request */ |
| 51 | #define RIPCMD_TRACEON 3 /* turn tracing on */ |
| 52 | #define RIPCMD_TRACEOFF 4 /* turn it off */ |
| 53 | #define RIPCMD_POLL 5 /* want info from everybody */ |
| 54 | #define RIPCMD_POLLENTRY 6 /* poll for entry */ |
| 55 | |
| 56 | struct rip_netinfo { |
| 57 | u_short rip_family; |
| 58 | u_short rip_tag; |
| 59 | u_int32_t rip_dest; |
| 60 | u_int32_t rip_dest_mask; |
| 61 | u_int32_t rip_router; |
| 62 | u_int32_t rip_metric; /* cost of route */ |
| 63 | }; |
| 64 | |
| 65 | static void |
| 66 | rip_entry_print(register int vers, register const struct rip_netinfo *ni) |
| 67 | { |
| 68 | register u_char *cp, *ep; |
| 69 | |
| 70 | if (EXTRACT_16BITS(&ni->rip_family) != AF_INET) { |
| 71 | |
| 72 | printf(" [family %d:", EXTRACT_16BITS(&ni->rip_family)); |
| 73 | cp = (u_char *)&ni->rip_tag; |
| 74 | ep = (u_char *)&ni->rip_metric + sizeof(ni->rip_metric); |
| 75 | for (; cp < ep; cp += 2) |
| 76 | printf(" %04x", EXTRACT_16BITS(cp)); |
| 77 | printf("]"); |
| 78 | } else if (vers < 2) { |
| 79 | /* RFC 1058 */ |
| 80 | printf(" %s", ipaddr_string(&ni->rip_dest)); |
| 81 | } else { |
| 82 | /* RFC 1723 */ |
| 83 | printf(" {%s", ipaddr_string(&ni->rip_dest)); |
| 84 | if (ni->rip_dest_mask) |
| 85 | printf("/%s", ipaddr_string(&ni->rip_dest_mask)); |
| 86 | if (ni->rip_router) |
| 87 | printf("->%s", ipaddr_string(&ni->rip_router)); |
| 88 | if (ni->rip_tag) |
| 89 | printf(" tag %04x", EXTRACT_16BITS(&ni->rip_tag)); |
| 90 | printf("}"); |
| 91 | } |
| 92 | printf("(%d)", EXTRACT_32BITS(&ni->rip_metric)); |
| 93 | } |
| 94 | |
| 95 | void |
| 96 | rip_print(const u_char *dat, u_int length) |
| 97 | { |
| 98 | register const struct rip *rp; |
| 99 | register const struct rip_netinfo *ni; |
| 100 | register int i, j, trunc; |
| 101 | |
| 102 | i = min(length, snapend - dat) - sizeof(*rp); |
| 103 | if (i < 0) |
| 104 | return; |
| 105 | |
| 106 | rp = (struct rip *)dat; |
| 107 | switch (rp->rip_cmd) { |
| 108 | |
| 109 | case RIPCMD_REQUEST: |
| 110 | printf(" rip-req %d", length); |
| 111 | break; |
| 112 | |
| 113 | case RIPCMD_RESPONSE: |
| 114 | j = length / sizeof(*ni); |
| 115 | if (j * sizeof(*ni) != length - 4) |
| 116 | printf(" rip-resp %d[%d]:", j, length); |
| 117 | else |
| 118 | printf(" rip-resp %d:", j); |
| 119 | trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); |
| 120 | ni = (struct rip_netinfo *)(rp + 1); |
| 121 | for (; (i -= sizeof(*ni)) >= 0; ++ni) |
| 122 | rip_entry_print(rp->rip_vers, ni); |
| 123 | if (trunc) |
| 124 | printf("[|rip]"); |
| 125 | break; |
| 126 | |
| 127 | case RIPCMD_TRACEON: |
| 128 | printf(" rip-traceon %d: \"", length); |
| 129 | (void)fn_print((const u_char *)(rp + 1), snapend); |
| 130 | fputs("\"\n", stdout); |
| 131 | break; |
| 132 | |
| 133 | case RIPCMD_TRACEOFF: |
| 134 | printf(" rip-traceoff %d", length); |
| 135 | break; |
| 136 | |
| 137 | case RIPCMD_POLL: |
| 138 | printf(" rip-poll %d", length); |
| 139 | break; |
| 140 | |
| 141 | case RIPCMD_POLLENTRY: |
| 142 | printf(" rip-pollentry %d", length); |
| 143 | break; |
| 144 | |
| 145 | default: |
| 146 | printf(" rip-#%d %d", rp->rip_cmd, length); |
| 147 | break; |
| 148 | } |
| 149 | switch (rp->rip_vers) { |
| 150 | |
| 151 | case 1: |
| 152 | case 2: |
| 153 | break; |
| 154 | |
| 155 | default: |
| 156 | printf(" [vers %d]", rp->rip_vers); |
| 157 | break; |
| 158 | } |
| 159 | } |