projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| c8cf0f94 PA |
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_ = | |
| 25 | "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.25.2.1 2005/07/07 01:24:34 guy Exp $ (LBL)"; | |
| 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 | */ |