/* * 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 1.25.2.1 2005/07/07 01:24:34 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #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: */