| /* |
| * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 |
| * 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: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-chdlc.c,v 1.34 2005-04-09 09:40:32 hannes Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <pcap.h> |
| #include <stdio.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "ethertype.h" |
| #include "extract.h" |
| #include "ppp.h" |
| #include "chdlc.h" |
| |
| static void chdlc_slarp_print(const u_char *, u_int); |
| |
| /* Standard CHDLC printer */ |
| u_int |
| chdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p) |
| { |
| register u_int length = h->len; |
| register u_int caplen = h->caplen; |
| const struct ip *ip; |
| u_int proto; |
| |
| if (caplen < CHDLC_HDRLEN) { |
| printf("[|chdlc]"); |
| return (caplen); |
| } |
| |
| proto = EXTRACT_16BITS(&p[2]); |
| if (eflag) { |
| switch (p[0]) { |
| case CHDLC_UNICAST: |
| printf("unicast "); |
| break; |
| case CHDLC_BCAST: |
| printf("bcast "); |
| break; |
| default: |
| printf("0x%02x ", p[0]); |
| break; |
| } |
| printf("%d %04x: ", length, proto); |
| } |
| |
| length -= CHDLC_HDRLEN; |
| ip = (const struct ip *)(p + CHDLC_HDRLEN); |
| switch (proto) { |
| case ETHERTYPE_IP: |
| ip_print(gndo, (const u_char *)ip, length); |
| break; |
| #ifdef INET6 |
| case ETHERTYPE_IPV6: |
| ip6_print((const u_char *)ip, length); |
| break; |
| #endif |
| case CHDLC_TYPE_SLARP: |
| chdlc_slarp_print((const u_char *)ip, length); |
| break; |
| #if 0 |
| case CHDLC_TYPE_CDP: |
| chdlc_cdp_print((const u_char *)ip, length); |
| break; |
| #endif |
| case ETHERTYPE_MPLS: |
| case ETHERTYPE_MPLS_MULTI: |
| mpls_print((const u_char *)(ip), length); |
| break; |
| case ETHERTYPE_ISO: |
| /* is the fudge byte set ? lets verify by spotting ISO headers */ |
| if (*(p+CHDLC_HDRLEN+1) == 0x81 || |
| *(p+CHDLC_HDRLEN+1) == 0x82 || |
| *(p+CHDLC_HDRLEN+1) == 0x83) |
| isoclns_print(p+CHDLC_HDRLEN+1, length-1, length-1); |
| else |
| isoclns_print(p+CHDLC_HDRLEN, length, length); |
| break; |
| default: |
| printf("unknown CHDLC protocol (0x%04x)", proto); |
| break; |
| } |
| |
| return (CHDLC_HDRLEN); |
| } |
| |
| struct cisco_slarp { |
| u_int8_t code[4]; |
| #define SLARP_REQUEST 0 |
| #define SLARP_REPLY 1 |
| #define SLARP_KEEPALIVE 2 |
| union { |
| struct { |
| u_int8_t addr[4]; |
| u_int8_t mask[4]; |
| } addr; |
| struct { |
| u_int8_t myseq[4]; |
| u_int8_t yourseq[4]; |
| u_int8_t rel[2]; |
| u_int8_t time[0]; |
| } keep; |
| } un; |
| }; |
| |
| #define SLARP_LEN 18 |
| |
| static void |
| chdlc_slarp_print(const u_char *cp, u_int length) |
| { |
| const struct cisco_slarp *slarp; |
| u_int sec,min,hrs,days; |
| |
| printf("SLARP (length: %u), ",length); |
| if (length < SLARP_LEN) |
| goto trunc; |
| |
| slarp = (const struct cisco_slarp *)cp; |
| TCHECK(*slarp); |
| switch (EXTRACT_32BITS(&slarp->code)) { |
| case SLARP_REQUEST: |
| printf("request"); |
| /* ok we do not know it - but lets at least dump it */ |
| print_unknown_data(cp+4,"\n\t",length-4); |
| break; |
| case SLARP_REPLY: |
| printf("reply %s/%s", |
| ipaddr_string(&slarp->un.addr.addr), |
| ipaddr_string(&slarp->un.addr.mask)); |
| break; |
| case SLARP_KEEPALIVE: |
| printf("keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x", |
| EXTRACT_32BITS(&slarp->un.keep.myseq), |
| EXTRACT_32BITS(&slarp->un.keep.yourseq), |
| EXTRACT_16BITS(&slarp->un.keep.rel)); |
| |
| if (length >= SLARP_LEN) { /* uptime-stamp is optional */ |
| sec = EXTRACT_32BITS(&slarp->un.keep.time) / 1000; |
| min = sec / 60; sec -= min * 60; |
| hrs = min / 60; min -= hrs * 60; |
| days = hrs / 24; hrs -= days * 24; |
| printf(", link uptime=%ud%uh%um%us",days,hrs,min,sec); |
| } |
| break; |
| default: |
| printf("0x%02x unknown", EXTRACT_32BITS(&slarp->code)); |
| if (vflag <= 1) |
| print_unknown_data(cp+4,"\n\t",length-4); |
| break; |
| } |
| |
| if (SLARP_LEN < length && vflag) |
| printf(", (trailing junk: %d bytes)", length - SLARP_LEN); |
| if (vflag > 1) |
| print_unknown_data(cp+4,"\n\t",length-4); |
| return; |
| |
| trunc: |
| printf("[|slarp]"); |
| } |
| |
| |
| /* |
| * Local Variables: |
| * c-style: whitesmith |
| * c-basic-offset: 8 |
| * End: |
| */ |