* 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 1.88 2004-02-18 14:23:27 hannes Exp $ (LBL)";
-#endif
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
-#include <pcap.h>
#include "interface.h"
+#include "extract.h"
#include "addrtoname.h"
#include "ethertype.h"
-
#include "ether.h"
-const u_char *snapend;
-
-const struct tok ethertype_values[] = {
+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_REVARP, "Reverse ARP"},
{ ETHERTYPE_NS, "NS" },
{ ETHERTYPE_SPRITE, "Sprite" },
{ ETHERTYPE_TRAIL, "Trail" },
{ ETHERTYPE_DN, "DN" },
{ ETHERTYPE_LAT, "LAT" },
{ ETHERTYPE_SCA, "SCA" },
+ { ETHERTYPE_TEB, "TEB" },
{ ETHERTYPE_LANBRIDGE, "Lanbridge" },
{ ETHERTYPE_DECDNS, "DEC DNS" },
{ ETHERTYPE_DECDTS, "DEC DTS" },
{ 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_LLDP, "LLDP" },
+ { ETHERTYPE_TIPC, "TIPC"},
+ { ETHERTYPE_GEONET_OLD, "GeoNet (old)"},
+ { ETHERTYPE_GEONET, "GeoNet"},
+ { ETHERTYPE_CALM_FAST, "CALM FAST"},
{ 0, NULL}
};
static inline void
-ether_hdr_print(register const u_char *bp, u_int length)
+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)printf("%s > %s",
+ (void)ND_PRINT((ndo, "%s > %s",
etheraddr_string(ESRC(ep)),
- etheraddr_string(EDST(ep)));
-
- if (!qflag) {
- if (ntohs(ep->ether_type) <= ETHERMTU)
- (void)printf(", 802.3");
- else
- (void)printf(", ethertype %s (0x%04x)",
- tok2str(ethertype_values,"Unknown", ntohs(ep->ether_type)),
- ntohs(ep->ether_type));
+ 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 (ntohs(ep->ether_type) <= ETHERMTU)
- (void)printf(", 802.3");
- else
- (void)printf(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ntohs(ep->ether_type)));
+ 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)printf(", length %u: ", length);
+ (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(const u_char *p, u_int length, u_int caplen)
+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) {
- printf("[|ether]");
+ if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) {
+ ND_PRINT((ndo, "[|ether]"));
return;
}
- if (eflag)
- ether_hdr_print(p, length);
+ 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 = ntohs(ep->ether_type);
+ ether_type = EXTRACT_16BITS(&ep->ether_type);
+recurse:
/*
* Is it (gag) an 802.3 encapsulation?
*/
- extracted_ether_type = 0;
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 (!eflag)
- ether_hdr_print((u_char *)ep, length + ETHER_HDRLEN);
+ 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);
- if (!xflag && !qflag)
- default_print(p, caplen);
+ ND_PRINT((ndo, "vlan %u, p %u%s, ",
+ tag & 0xfff,
+ tag >> 13,
+ (tag & 0x1000) ? ", CFI" : ""));
}
- } else if (ether_encap_print(ether_type, p, length, caplen,
- &extracted_ether_type) == 0) {
- /* ether_type not known, print raw packet */
- if (!eflag)
- ether_hdr_print((u_char *)ep, length + ETHER_HDRLEN);
-
- if (!xflag && !qflag)
- default_print(p, caplen);
- }
+
+ 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->length' is the length of the packet off the wire, and 'h->caplen'
+ * '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(const struct pcap_pkthdr *h, const u_char *p)
+ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
+ const u_char *p)
{
- ether_print(p, h->len, h->caplen);
+ ether_print(ndo, p, h->len, h->caplen, NULL, NULL);
return (ETHER_HDRLEN);
}
/*
- * Prints the packet encapsulated in an Ethernet data segment
- * (or an equivalent encapsulation), given the Ethernet type code.
+ * 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.
*
- * Returns non-zero if it can do so, zero if the ethertype is unknown.
+ * 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.
*
- * The Ethernet type code is passed through a pointer; if it was
- * ETHERTYPE_8021Q, it gets updated to be the Ethernet type of
- * the 802.1Q payload, for the benefit of lower layers that might
- * want to know what it is.
+ * 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
-ether_encap_print(u_short ether_type, const u_char *p,
- u_int length, u_int caplen, u_short *extracted_ether_type)
+ethertype_print(netdissect_options *ndo,
+ u_short ether_type, const u_char *p,
+ u_int length, u_int caplen)
{
- recurse:
- *extracted_ether_type = ether_type;
-
switch (ether_type) {
case ETHERTYPE_IP:
- ip_print(p, length);
+ ip_print(ndo, p, length);
return (1);
#ifdef INET6
case ETHERTYPE_IPV6:
- ip6_print(p, length);
+ ip6_print(ndo, p, length);
return (1);
#endif /*INET6*/
case ETHERTYPE_ARP:
case ETHERTYPE_REVARP:
- arp_print(p, length, caplen);
+ arp_print(ndo, p, length, caplen);
return (1);
case ETHERTYPE_DN:
- decnet_print(p, length, caplen);
+ decnet_print(/*ndo,*/p, length, caplen);
return (1);
case ETHERTYPE_ATALK:
- if (vflag)
+ if (ndo->ndo_vflag)
fputs("et1 ", stdout);
- atalk_print(p, length);
+ atalk_print(/*ndo,*/p, length);
return (1);
case ETHERTYPE_AARP:
- aarp_print(p, length);
+ aarp_print(/*ndo,*/p, length);
return (1);
case ETHERTYPE_IPX:
- printf("(NOV-ETHII) ");
- ipx_print(p, length);
+ ND_PRINT((ndo, "(NOV-ETHII) "));
+ ipx_print(/*ndo,*/p, length);
return (1);
- case ETHERTYPE_8021Q:
- if (eflag)
- printf("vlan %u, p %u%s, ",
- ntohs(*(u_int16_t *)p) & 0xfff,
- ntohs(*(u_int16_t *)p) >> 13,
- (ntohs(*(u_int16_t *)p) & 0x1000) ? ", CFI" : "");
+ case ETHERTYPE_ISO:
+ isoclns_print(/*ndo,*/p+1, length-1, length-1);
+ return(1);
- ether_type = ntohs(*(u_int16_t *)(p + 2));
- p += 4;
- length -= 4;
- caplen -= 4;
+ case ETHERTYPE_PPPOED:
+ case ETHERTYPE_PPPOES:
+ case ETHERTYPE_PPPOED2:
+ case ETHERTYPE_PPPOES2:
+ pppoe_print(/*ndo,*/p, length);
+ return (1);
- if (ether_type > ETHERMTU) {
- if (eflag)
- printf("ethertype %s, ",
- tok2str(ethertype_values,"0x%04x", ether_type));
- goto recurse;
- }
+ case ETHERTYPE_EAPOL:
+ eap_print(ndo, p, length);
+ return (1);
- *extracted_ether_type = 0;
+ case ETHERTYPE_RRCP:
+ rrcp_print(ndo, p - 14 , length + 14);
+ return (1);
- if (llc_print(p, length, caplen, p - 18, p - 12,
- extracted_ether_type) == 0) {
- ether_hdr_print(p - 18, length + 4);
+ case ETHERTYPE_PPP:
+ if (length) {
+ printf(": ");
+ ppp_print(/*ndo,*/p, length);
}
-
- if (!xflag && !qflag)
- default_print(p - 18, caplen + 4);
-
return (1);
- case ETHERTYPE_JUMBO:
- ether_type = ntohs(*(u_int16_t *)(p));
- p += 2;
- length -= 2;
- caplen -= 2;
-
- if (ether_type > ETHERMTU) {
- if (eflag)
- printf("ethertype %s, ",
- tok2str(ethertype_values,"0x%04x", ether_type));
- goto recurse;
- }
+ case ETHERTYPE_MPCP:
+ mpcp_print(/*ndo,*/p, length);
+ return (1);
- *extracted_ether_type = 0;
+ case ETHERTYPE_SLOW:
+ slow_print(/*ndo,*/p, length);
+ return (1);
- if (llc_print(p, length, caplen, p - 16, p - 10,
- extracted_ether_type) == 0) {
- ether_hdr_print(p - 16, length + 2);
- }
+ case ETHERTYPE_CFM:
+ case ETHERTYPE_CFM_OLD:
+ cfm_print(/*ndo,*/p, length);
+ return (1);
- if (!xflag && !qflag)
- default_print(p - 16, caplen + 2);
+ case ETHERTYPE_LLDP:
+ lldp_print(/*ndo,*/p, length);
+ return (1);
+ case ETHERTYPE_LOOPBACK:
+ loopback_print(ndo, p, length);
return (1);
- case ETHERTYPE_ISO:
- isoclns_print(p+1, length-1, length-1);
- return(1);
+ case ETHERTYPE_MPLS:
+ case ETHERTYPE_MPLS_MULTI:
+ mpls_print(/*ndo,*/p, length);
+ return (1);
- case ETHERTYPE_PPPOED:
- case ETHERTYPE_PPPOES:
- pppoe_print(p, length);
+ case ETHERTYPE_TIPC:
+ tipc_print(ndo, p, length, caplen);
return (1);
- case ETHERTYPE_PPP:
- if (length) {
- printf(": ");
- ppp_print(p, length);
- }
+ case ETHERTYPE_MS_NLB_HB:
+ msnlb_print(ndo, p);
return (1);
- case ETHERTYPE_LOOPBACK:
- return (0);
+ case ETHERTYPE_GEONET_OLD:
+ case ETHERTYPE_GEONET:
+ geonet_print(ndo, p-14, p, length);
+ return (1);
- case ETHERTYPE_MPLS:
- case ETHERTYPE_MPLS_MULTI:
- mpls_print(p, length);
- return (1);
+ case ETHERTYPE_CALM_FAST:
+ calm_fast_print(ndo, p-14, p, length);
+ return (1);
case ETHERTYPE_LAT:
case ETHERTYPE_SCA:
return (0);
}
}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
+
projects / tcpdump / blobdiff