nexmon – Rev 1
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/*
* 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.
*/
#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:
*/