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Diffstat (limited to 'contrib/tcpdump/print-ether.c')
| -rw-r--r-- | contrib/tcpdump/print-ether.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-ether.c b/contrib/tcpdump/print-ether.c new file mode 100644 index 0000000..b96620f --- /dev/null +++ b/contrib/tcpdump/print-ether.c @@ -0,0 +1,447 @@ +/* + * 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. + * + * $FreeBSD$ + */ + +#define NETDISSECT_REWORKED +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#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_MS_NLB_HB, "MS NLB heartbeat" }, + { ETHERTYPE_JUMBO, "Jumbo" }, + { ETHERTYPE_LOOPBACK, "Loopback" }, + { ETHERTYPE_ISO, "OSI" }, + { ETHERTYPE_GRE_ISO, "GRE-OSI" }, + { ETHERTYPE_CFM_OLD, "CFM (old)" }, + { ETHERTYPE_CFM, "CFM" }, + { ETHERTYPE_IEEE1905_1, "IEEE1905.1" }, + { ETHERTYPE_LLDP, "LLDP" }, + { ETHERTYPE_TIPC, "TIPC"}, + { ETHERTYPE_GEONET_OLD, "GeoNet (old)"}, + { ETHERTYPE_GEONET, "GeoNet"}, + { ETHERTYPE_CALM_FAST, "CALM FAST"}, + { ETHERTYPE_AOE, "AoE" }, + { 0, NULL} +}; + +static inline void +ether_hdr_print(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + register const struct ether_header *ep; + uint16_t ether_type; + + ep = (const struct ether_header *)bp; + + ND_PRINT((ndo, "%s > %s", + etheraddr_string(ndo, ESRC(ep)), + etheraddr_string(ndo, EDST(ep)))); + + ether_type = EXTRACT_16BITS(&ep->ether_type); + if (!ndo->ndo_qflag) { + if (ether_type <= ETHERMTU) + ND_PRINT((ndo, ", 802.3")); + else + ND_PRINT((ndo, ", ethertype %s (0x%04x)", + tok2str(ethertype_values,"Unknown", ether_type), + ether_type)); + } else { + if (ether_type <= ETHERMTU) + ND_PRINT((ndo, ", 802.3")); + else + ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type))); + } + + 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(ndo, 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) + ND_DEFAULTPRINT(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) { + uint16_t tag = EXTRACT_16BITS(p); + + ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag))); + } + + 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(ndo, 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) + ND_DEFAULTPRINT(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) + ND_DEFAULTPRINT(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) { + ND_PRINT((ndo, "[|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) { + ND_PRINT((ndo, "[|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); + + case ETHERTYPE_IPV6: + ip6_print(ndo, p, length); + return (1); + + 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) + ND_PRINT((ndo, "et1 ")); + 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) { + ND_PRINT((ndo, ": ")); + 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: + loopback_print(ndo, p, length); + 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_MS_NLB_HB: + msnlb_print(ndo, p); + return (1); + + case ETHERTYPE_GEONET_OLD: + case ETHERTYPE_GEONET: + geonet_print(ndo, p-14, p, length); + return (1); + + case ETHERTYPE_CALM_FAST: + calm_fast_print(ndo, p-14, p, length); + return (1); + + case ETHERTYPE_AOE: + aoe_print(ndo, p, length); + return (1); + + case ETHERTYPE_LAT: + case ETHERTYPE_SCA: + case ETHERTYPE_MOPRC: + case ETHERTYPE_MOPDL: + case ETHERTYPE_IEEE1905_1: + /* default_print for now */ + default: + return (0); + } +} + + +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */ + |
