| /* |
| * Marko Kiiskila carnil@cs.tut.fi |
| * |
| * Tampere University of Technology - Telecommunications Laboratory |
| * |
| * Permission to use, copy, modify and distribute this |
| * software and its documentation is hereby granted, |
| * provided that both the copyright notice and this |
| * permission notice appear in all copies of the software, |
| * derivative works or modified versions, and any portions |
| * thereof, that both notices appear in supporting |
| * documentation, and that the use of this software is |
| * acknowledged in any publications resulting from using |
| * the software. |
| * |
| * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS |
| * SOFTWARE. |
| * |
| */ |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.26 2005-07-07 01:22:17 guy Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| #include <pcap.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "ethertype.h" |
| #include "ether.h" |
| |
| #define RFC1483LLC_LEN 8 |
| |
| static unsigned char rfcllc[] = { |
| 0xaa, /* DSAP: non-ISO */ |
| 0xaa, /* SSAP: non-ISO */ |
| 0x03, /* Ctrl: Unnumbered Information Command PDU */ |
| 0x00, /* OUI: EtherType */ |
| 0x00, |
| 0x00 }; |
| |
| static inline void |
| cip_print(int length) |
| { |
| /* |
| * There is no MAC-layer header, so just print the length. |
| */ |
| printf("%d: ", length); |
| } |
| |
| /* |
| * This is the top level routine of the printer. 'p' points |
| * to the LLC/SNAP or raw header of the packet, 'h->ts' is the timestamp, |
| * 'h->len' is the length of the packet off the wire, and 'h->caplen' |
| * is the number of bytes actually captured. |
| */ |
| u_int |
| cip_if_print(const struct pcap_pkthdr *h, const u_char *p) |
| { |
| u_int caplen = h->caplen; |
| u_int length = h->len; |
| u_short extracted_ethertype; |
| |
| if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) { |
| printf("[|cip]"); |
| return (0); |
| } |
| |
| if (eflag) |
| cip_print(length); |
| |
| if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) { |
| /* |
| * LLC header is present. Try to print it & higher layers. |
| */ |
| if (llc_print(p, length, caplen, NULL, NULL, |
| &extracted_ethertype) == 0) { |
| /* ether_type not known, print raw packet */ |
| if (!eflag) |
| cip_print(length); |
| if (extracted_ethertype) { |
| printf("(LLC %s) ", |
| etherproto_string(htons(extracted_ethertype))); |
| } |
| if (!suppress_default_print) |
| default_print(p, caplen); |
| } |
| } else { |
| /* |
| * LLC header is absent; treat it as just IP. |
| */ |
| ip_print(gndo, p, length); |
| } |
| |
| return (0); |
| } |
| |
| |
| /* |
| * Local Variables: |
| * c-style: whitesmith |
| * c-basic-offset: 8 |
| * End: |
| */ |
