The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Marko Kiiskila carnil@cs.tut.fi |
| 3 | * |
| 4 | * Tampere University of Technology - Telecommunications Laboratory |
| 5 | * |
| 6 | * Permission to use, copy, modify and distribute this |
| 7 | * software and its documentation is hereby granted, |
| 8 | * provided that both the copyright notice and this |
| 9 | * permission notice appear in all copies of the software, |
| 10 | * derivative works or modified versions, and any portions |
| 11 | * thereof, that both notices appear in supporting |
| 12 | * documentation, and that the use of this software is |
| 13 | * acknowledged in any publications resulting from using |
| 14 | * the software. |
| 15 | * |
| 16 | * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| 17 | * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| 18 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS |
| 19 | * SOFTWARE. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #ifndef lint |
| 24 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 25 | "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.26 2005-07-07 01:22:17 guy Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 26 | #endif |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include <string.h> |
| 33 | |
| 34 | #include <tcpdump-stdinc.h> |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | #include <pcap.h> |
| 38 | |
| 39 | #include "interface.h" |
| 40 | #include "addrtoname.h" |
| 41 | #include "ethertype.h" |
| 42 | #include "ether.h" |
| 43 | |
| 44 | #define RFC1483LLC_LEN 8 |
| 45 | |
| 46 | static unsigned char rfcllc[] = { |
| 47 | 0xaa, /* DSAP: non-ISO */ |
| 48 | 0xaa, /* SSAP: non-ISO */ |
| 49 | 0x03, /* Ctrl: Unnumbered Information Command PDU */ |
| 50 | 0x00, /* OUI: EtherType */ |
| 51 | 0x00, |
| 52 | 0x00 }; |
| 53 | |
| 54 | static inline void |
| 55 | cip_print(int length) |
| 56 | { |
| 57 | /* |
| 58 | * There is no MAC-layer header, so just print the length. |
| 59 | */ |
| 60 | printf("%d: ", length); |
| 61 | } |
| 62 | |
| 63 | /* |
| 64 | * This is the top level routine of the printer. 'p' points |
| 65 | * to the LLC/SNAP or raw header of the packet, 'h->ts' is the timestamp, |
| 66 | * 'h->len' is the length of the packet off the wire, and 'h->caplen' |
| 67 | * is the number of bytes actually captured. |
| 68 | */ |
| 69 | u_int |
| 70 | cip_if_print(const struct pcap_pkthdr *h, const u_char *p) |
| 71 | { |
| 72 | u_int caplen = h->caplen; |
| 73 | u_int length = h->len; |
| 74 | u_short extracted_ethertype; |
| 75 | |
| 76 | if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) { |
| 77 | printf("[|cip]"); |
| 78 | return (0); |
| 79 | } |
| 80 | |
| 81 | if (eflag) |
| 82 | cip_print(length); |
| 83 | |
| 84 | if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) { |
| 85 | /* |
| 86 | * LLC header is present. Try to print it & higher layers. |
| 87 | */ |
| 88 | if (llc_print(p, length, caplen, NULL, NULL, |
| 89 | &extracted_ethertype) == 0) { |
| 90 | /* ether_type not known, print raw packet */ |
| 91 | if (!eflag) |
| 92 | cip_print(length); |
| 93 | if (extracted_ethertype) { |
| 94 | printf("(LLC %s) ", |
| 95 | etherproto_string(htons(extracted_ethertype))); |
| 96 | } |
| 97 | if (!suppress_default_print) |
| 98 | default_print(p, caplen); |
| 99 | } |
| 100 | } else { |
| 101 | /* |
| 102 | * LLC header is absent; treat it as just IP. |
| 103 | */ |
| 104 | ip_print(gndo, p, length); |
| 105 | } |
| 106 | |
| 107 | return (0); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | /* |
| 112 | * Local Variables: |
| 113 | * c-style: whitesmith |
| 114 | * c-basic-offset: 8 |
| 115 | * End: |
| 116 | */ |