/* * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 * 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-ether.c,v 1.106 2008-02-06 10:47:53 guy Exp $ (LBL)"; #endif #define NETDISSECT_REWORKED #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "interface.h" #include "extract.h" #include "addrtoname.h" #include "ethertype.h" #include "ether.h" const struct tok ethertype_values[] = { { ETHERTYPE_IP, "IPv4" }, { ETHERTYPE_MPLS, "MPLS unicast" }, { ETHERTYPE_MPLS_MULTI, "MPLS multicast" }, { ETHERTYPE_IPV6, "IPv6" }, { ETHERTYPE_8021Q, "802.1Q" }, { ETHERTYPE_8021Q9100, "802.1Q-9100" }, { ETHERTYPE_8021QinQ, "802.1Q-QinQ" }, { ETHERTYPE_8021Q9200, "802.1Q-9200" }, { ETHERTYPE_VMAN, "VMAN" }, { ETHERTYPE_PUP, "PUP" }, { ETHERTYPE_ARP, "ARP"}, { ETHERTYPE_REVARP, "Reverse ARP"}, { ETHERTYPE_NS, "NS" }, { ETHERTYPE_SPRITE, "Sprite" }, { ETHERTYPE_TRAIL, "Trail" }, { ETHERTYPE_MOPDL, "MOP DL" }, { ETHERTYPE_MOPRC, "MOP RC" }, { ETHERTYPE_DN, "DN" }, { ETHERTYPE_LAT, "LAT" }, { ETHERTYPE_SCA, "SCA" }, { ETHERTYPE_TEB, "TEB" }, { ETHERTYPE_LANBRIDGE, "Lanbridge" }, { ETHERTYPE_DECDNS, "DEC DNS" }, { ETHERTYPE_DECDTS, "DEC DTS" }, { ETHERTYPE_VEXP, "VEXP" }, { ETHERTYPE_VPROD, "VPROD" }, { ETHERTYPE_ATALK, "Appletalk" }, { ETHERTYPE_AARP, "Appletalk ARP" }, { ETHERTYPE_IPX, "IPX" }, { ETHERTYPE_PPP, "PPP" }, { ETHERTYPE_MPCP, "MPCP" }, { ETHERTYPE_SLOW, "Slow Protocols" }, { ETHERTYPE_PPPOED, "PPPoE D" }, { ETHERTYPE_PPPOES, "PPPoE S" }, { ETHERTYPE_EAPOL, "EAPOL" }, { ETHERTYPE_RRCP, "RRCP" }, { ETHERTYPE_JUMBO, "Jumbo" }, { ETHERTYPE_LOOPBACK, "Loopback" }, { ETHERTYPE_ISO, "OSI" }, { ETHERTYPE_GRE_ISO, "GRE-OSI" }, { ETHERTYPE_CFM_OLD, "CFM (old)" }, { ETHERTYPE_CFM, "CFM" }, { ETHERTYPE_LLDP, "LLDP" }, { ETHERTYPE_TIPC, "TIPC"}, { 0, NULL} }; static inline void ether_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) { register const struct ether_header *ep; u_int16_t ether_type; ep = (const struct ether_header *)bp; (void)ND_PRINT((ndo, "%s > %s", etheraddr_string(ESRC(ep)), etheraddr_string(EDST(ep)))); ether_type = EXTRACT_16BITS(&ep->ether_type); if (!ndo->ndo_qflag) { if (ether_type <= ETHERMTU) (void)ND_PRINT((ndo, ", 802.3")); else (void)ND_PRINT((ndo, ", ethertype %s (0x%04x)", tok2str(ethertype_values,"Unknown", ether_type), ether_type)); } else { if (ether_type <= ETHERMTU) (void)ND_PRINT((ndo, ", 802.3")); else (void)ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type))); } (void)ND_PRINT((ndo, ", length %u: ", length)); } /* * Print an Ethernet frame. * This might be encapsulated within another frame; we might be passed * a pointer to a function that can print header information for that * frame's protocol, and an argument to pass to that function. */ void ether_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen, void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg) { struct ether_header *ep; u_int orig_length; u_short ether_type; u_short extracted_ether_type; if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) { ND_PRINT((ndo, "[|ether]")); return; } if (ndo->ndo_eflag) { if (print_encap_header != NULL) (*print_encap_header)(ndo, encap_header_arg); ether_hdr_print(ndo, p, length); } orig_length = length; length -= ETHER_HDRLEN; caplen -= ETHER_HDRLEN; ep = (struct ether_header *)p; p += ETHER_HDRLEN; ether_type = EXTRACT_16BITS(&ep->ether_type); recurse: /* * Is it (gag) an 802.3 encapsulation? */ if (ether_type <= ETHERMTU) { /* Try to print the LLC-layer header & higher layers */ if (llc_print(p, length, caplen, ESRC(ep), EDST(ep), &extracted_ether_type) == 0) { /* ether_type not known, print raw packet */ if (!ndo->ndo_eflag) { if (print_encap_header != NULL) (*print_encap_header)(ndo, encap_header_arg); ether_hdr_print(ndo, (u_char *)ep, orig_length); } if (!ndo->ndo_suppress_default_print) ndo->ndo_default_print(ndo, p, caplen); } } else if (ether_type == ETHERTYPE_8021Q || ether_type == ETHERTYPE_8021Q9100 || ether_type == ETHERTYPE_8021Q9200 || ether_type == ETHERTYPE_8021QinQ) { /* * Print VLAN information, and then go back and process * the enclosed type field. */ if (caplen < 4 || length < 4) { ND_PRINT((ndo, "[|vlan]")); return; } if (ndo->ndo_eflag) { u_int16_t tag = EXTRACT_16BITS(p); ND_PRINT((ndo, "vlan %u, p %u%s, ", tag & 0xfff, tag >> 13, (tag & 0x1000) ? ", CFI" : "")); } ether_type = EXTRACT_16BITS(p + 2); if (ndo->ndo_eflag && ether_type > ETHERMTU) ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type))); p += 4; length -= 4; caplen -= 4; goto recurse; } else if (ether_type == ETHERTYPE_JUMBO) { /* * Alteon jumbo frames. * See * * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01 * * which indicates that, following the type field, * there's an LLC header and payload. */ /* Try to print the LLC-layer header & higher layers */ if (llc_print(p, length, caplen, ESRC(ep), EDST(ep), &extracted_ether_type) == 0) { /* ether_type not known, print raw packet */ if (!ndo->ndo_eflag) { if (print_encap_header != NULL) (*print_encap_header)(ndo, encap_header_arg); ether_hdr_print(ndo, (u_char *)ep, orig_length); } if (!ndo->ndo_suppress_default_print) ndo->ndo_default_print(ndo, p, caplen); } } else { if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) { /* ether_type not known, print raw packet */ if (!ndo->ndo_eflag) { if (print_encap_header != NULL) (*print_encap_header)(ndo, encap_header_arg); ether_hdr_print(ndo, (u_char *)ep, orig_length); } if (!ndo->ndo_suppress_default_print) ndo->ndo_default_print(ndo, p, caplen); } } } /* * This is the top level routine of the printer. 'p' points * to the ether 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 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) { ether_print(ndo, p, h->len, h->caplen, NULL, NULL); return (ETHER_HDRLEN); } /* * This is the top level routine of the printer. 'p' points * to the ether 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. * * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header * before the Ethernet header. */ u_int netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) { /* * Fail if we don't have enough data for the Hilscher pseudo-header. */ if (h->len < 4 || h->caplen < 4) { printf("[|netanalyzer]"); return (h->caplen); } /* Skip the pseudo-header. */ ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL); return (4 + ETHER_HDRLEN); } /* * This is the top level routine of the printer. 'p' points * to the ether 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. * * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF * before the Ethernet header. */ u_int netanalyzer_transparent_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) { /* * Fail if we don't have enough data for the Hilscher pseudo-header, * preamble, and SOF. */ if (h->len < 12 || h->caplen < 12) { printf("[|netanalyzer-transparent]"); return (h->caplen); } /* Skip the pseudo-header, preamble, and SOF. */ ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL); return (12 + ETHER_HDRLEN); } /* * Prints the packet payload, given an Ethernet type code for the payload's * protocol. * * Returns non-zero if it can do so, zero if the ethertype is unknown. */ int ethertype_print(netdissect_options *ndo, u_short ether_type, const u_char *p, u_int length, u_int caplen) { switch (ether_type) { case ETHERTYPE_IP: ip_print(ndo, p, length); return (1); #ifdef INET6 case ETHERTYPE_IPV6: ip6_print(ndo, p, length); return (1); #endif /*INET6*/ case ETHERTYPE_ARP: case ETHERTYPE_REVARP: arp_print(ndo, p, length, caplen); return (1); case ETHERTYPE_DN: decnet_print(/*ndo,*/p, length, caplen); return (1); case ETHERTYPE_ATALK: if (ndo->ndo_vflag) fputs("et1 ", stdout); atalk_print(/*ndo,*/p, length); return (1); case ETHERTYPE_AARP: aarp_print(/*ndo,*/p, length); return (1); case ETHERTYPE_IPX: ND_PRINT((ndo, "(NOV-ETHII) ")); ipx_print(/*ndo,*/p, length); return (1); case ETHERTYPE_ISO: isoclns_print(/*ndo,*/p+1, length-1, length-1); return(1); case ETHERTYPE_PPPOED: case ETHERTYPE_PPPOES: case ETHERTYPE_PPPOED2: case ETHERTYPE_PPPOES2: pppoe_print(/*ndo,*/p, length); return (1); case ETHERTYPE_EAPOL: eap_print(ndo, p, length); return (1); case ETHERTYPE_RRCP: rrcp_print(ndo, p - 14 , length + 14); return (1); case ETHERTYPE_PPP: if (length) { printf(": "); ppp_print(/*ndo,*/p, length); } return (1); case ETHERTYPE_MPCP: mpcp_print(/*ndo,*/p, length); return (1); case ETHERTYPE_SLOW: slow_print(/*ndo,*/p, length); return (1); case ETHERTYPE_CFM: case ETHERTYPE_CFM_OLD: cfm_print(/*ndo,*/p, length); return (1); case ETHERTYPE_LLDP: lldp_print(/*ndo,*/p, length); return (1); case ETHERTYPE_LOOPBACK: return (1); case ETHERTYPE_MPLS: case ETHERTYPE_MPLS_MULTI: mpls_print(/*ndo,*/p, length); return (1); case ETHERTYPE_TIPC: tipc_print(ndo, p, length, caplen); return (1); case ETHERTYPE_LAT: case ETHERTYPE_SCA: case ETHERTYPE_MOPRC: case ETHERTYPE_MOPDL: /* default_print for now */ default: return (0); } } /* * Local Variables: * c-style: whitesmith * c-basic-offset: 8 * End: */