* 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
+/* \summary: Ethernet printer */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <pcap.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "ethertype.h"
-#include "ether.h"
+/*
+ * Structure of an Ethernet header.
+ */
+struct ether_header {
+ nd_mac_addr ether_dhost;
+ nd_mac_addr ether_shost;
+ nd_uint16_t ether_length_type;
+};
-const struct tok ethertype_values[] = {
+/*
+ * Length of an Ethernet header; note that some compilers may pad
+ * "struct ether_header" to a multiple of 4 bytes, for example, so
+ * "sizeof (struct ether_header)" may not give the right answer.
+ */
+#define ETHER_HDRLEN 14
+
+const struct tok ethertype_values[] = {
{ ETHERTYPE_IP, "IPv4" },
{ ETHERTYPE_MPLS, "MPLS unicast" },
{ ETHERTYPE_MPLS_MULTI, "MPLS multicast" },
{ ETHERTYPE_PPPOES, "PPPoE S" },
{ ETHERTYPE_EAPOL, "EAPOL" },
{ ETHERTYPE_RRCP, "RRCP" },
+ { ETHERTYPE_MS_NLB_HB, "MS NLB heartbeat" },
{ ETHERTYPE_JUMBO, "Jumbo" },
+ { ETHERTYPE_NSH, "NSH" },
{ 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" },
+ { ETHERTYPE_MEDSA, "MEDSA" },
{ 0, NULL}
};
-static inline void
+static void
ether_hdr_print(netdissect_options *ndo,
- const u_char *bp, u_int length)
+ const u_char *bp, u_int length,
+ u_int hdrlen)
{
- register const struct ether_header *ep;
- u_int16_t ether_type;
+ const struct ether_header *ehp;
+ uint16_t length_type;
- ep = (const struct ether_header *)bp;
+ ehp = (const struct ether_header *)bp;
- (void)ND_PRINT((ndo, "%s > %s",
- etheraddr_string(ESRC(ep)),
- etheraddr_string(EDST(ep))));
+ ND_PRINT("%s > %s",
+ etheraddr_string(ndo, ehp->ether_shost),
+ etheraddr_string(ndo, ehp->ether_dhost));
- ether_type = EXTRACT_16BITS(&ep->ether_type);
+ length_type = GET_BE_U_2(bp + (hdrlen - sizeof(ehp->ether_length_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));
+ if (length_type <= MAX_ETHERNET_LENGTH_VAL) {
+ ND_PRINT(", 802.3");
+ length = length_type;
+ } else
+ ND_PRINT(", ethertype %s (0x%04x)",
+ tok2str(ethertype_values,"Unknown", length_type),
+ length_type);
+ } else {
+ if (length_type <= MAX_ETHERNET_LENGTH_VAL) {
+ ND_PRINT(", 802.3");
+ length = length_type;
+ } else
+ ND_PRINT(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", length_type));
+ }
+
+ ND_PRINT(", length %u: ", length);
}
/*
- * Print an Ethernet frame.
+ * Print an Ethernet frame while specyfing a non-standard Ethernet header
+ * length.
* 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.
+ *
+ * FIXME: caplen can and should be derived from ndo->ndo_snapend and p.
*/
-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)
+u_int
+ether_print_hdr_len(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, u_int hdrlen)
{
- struct ether_header *ep;
+ const struct ether_header *ehp;
u_int orig_length;
- u_short ether_type;
- u_short extracted_ether_type;
+ u_short length_type;
+ int llc_hdrlen;
+ struct lladdr_info src, dst;
+
+ /* Unless specified otherwise, assume a standard Ethernet header */
+ if (hdrlen == ETHER_HDRLEN)
+ ndo->ndo_protocol = "ether";
- if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) {
- ND_PRINT((ndo, "[|ether]"));
- return;
+ if (caplen < hdrlen) {
+ nd_print_trunc(ndo);
+ return (caplen);
+ }
+ if (length < hdrlen) {
+ nd_print_trunc(ndo);
+ return (length);
}
+ /* If the offset is set, then the upper printer is responsible for
+ * printing the relevant part of the Ethernet header.
+ */
if (ndo->ndo_eflag) {
if (print_encap_header != NULL)
(*print_encap_header)(ndo, encap_header_arg);
- ether_hdr_print(ndo, p, length);
+ ether_hdr_print(ndo, p, length, hdrlen);
}
+
orig_length = length;
- length -= ETHER_HDRLEN;
- caplen -= ETHER_HDRLEN;
- ep = (struct ether_header *)p;
- p += ETHER_HDRLEN;
+ length -= hdrlen;
+ caplen -= hdrlen;
+ ehp = (const struct ether_header *)p;
+ p += hdrlen;
- ether_type = EXTRACT_16BITS(&ep->ether_type);
+ src.addr = ehp->ether_shost;
+ src.addr_string = etheraddr_string;
+ dst.addr = ehp->ether_dhost;
+ dst.addr_string = etheraddr_string;
+ length_type = GET_BE_U_2((const u_char *)ehp + (hdrlen - sizeof(ehp->ether_length_type)));
recurse:
/*
* Is it (gag) an 802.3 encapsulation?
*/
- if (ether_type <= ETHERMTU) {
+ if (length_type <= MAX_ETHERNET_LENGTH_VAL) {
/* 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);
- }
-
+ llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
+ if (llc_hdrlen < 0) {
+ /* packet type not known, print raw packet */
if (!ndo->ndo_suppress_default_print)
- ndo->ndo_default_print(ndo, p, caplen);
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = -llc_hdrlen;
}
- } else if (ether_type == ETHERTYPE_8021Q ||
- ether_type == ETHERTYPE_8021Q9100 ||
- ether_type == ETHERTYPE_8021Q9200 ||
- ether_type == ETHERTYPE_8021QinQ) {
+ hdrlen += llc_hdrlen;
+ } else if (length_type == ETHERTYPE_8021Q ||
+ length_type == ETHERTYPE_8021Q9100 ||
+ length_type == ETHERTYPE_8021Q9200 ||
+ length_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 (caplen < 4) {
+ ndo->ndo_protocol = "vlan";
+ nd_print_trunc(ndo);
+ return (hdrlen + caplen);
}
- if (ndo->ndo_eflag) {
- u_int16_t tag = EXTRACT_16BITS(p);
+ if (length < 4) {
+ ndo->ndo_protocol = "vlan";
+ nd_print_trunc(ndo);
+ return (hdrlen + length);
+ }
+ if (ndo->ndo_eflag) {
+ uint16_t tag = GET_BE_U_2(p);
- ND_PRINT((ndo, "vlan %u, p %u%s, ",
- tag & 0xfff,
- tag >> 13,
- (tag & 0x1000) ? ", CFI" : ""));
+ ND_PRINT("%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)));
+ length_type = GET_BE_U_2(p + 2);
+ if (ndo->ndo_eflag && length_type > MAX_ETHERNET_LENGTH_VAL)
+ ND_PRINT("ethertype %s, ", tok2str(ethertype_values,"0x%04x", length_type));
p += 4;
length -= 4;
caplen -= 4;
+ hdrlen += 4;
goto recurse;
- } else if (ether_type == ETHERTYPE_JUMBO) {
+ } else if (length_type == ETHERTYPE_JUMBO) {
/*
* Alteon jumbo frames.
* See
* 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);
- }
-
+ llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
+ if (llc_hdrlen < 0) {
+ /* packet type not known, print raw packet */
if (!ndo->ndo_suppress_default_print)
- ndo->ndo_default_print(ndo, p, caplen);
+ ND_DEFAULTPRINT(p, caplen);
+ llc_hdrlen = -llc_hdrlen;
}
+ hdrlen += llc_hdrlen;
} else {
- if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
- /* ether_type not known, print raw packet */
+ if (ethertype_print(ndo, length_type, p, length, caplen, &src, &dst) == 0) {
+ /* 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);
+ ether_hdr_print(ndo, (const u_char *)ehp, orig_length,
+ hdrlen);
}
if (!ndo->ndo_suppress_default_print)
- ndo->ndo_default_print(ndo, p, caplen);
+ ND_DEFAULTPRINT(p, caplen);
}
}
+ return (hdrlen);
+}
+
+/*
+ * 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.
+ *
+ * FIXME: caplen can and should be derived from ndo->ndo_snapend and p.
+ */
+u_int
+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)
+{
+ return (ether_print_hdr_len(ndo, p, length, caplen,
+ print_encap_header, encap_header_arg,
+ 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.
+ * to the ether header of the packet, '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)
+ const u_char *p)
{
- ether_print(ndo, p, h->len, h->caplen, NULL, NULL);
+ ndo->ndo_protocol = "ether_if";
+ return (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->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.
+ */
+ ndo->ndo_protocol = "netanalyzer_if";
+ if (h->caplen < 4) {
+ nd_print_trunc(ndo);
+ return (h->caplen);
+ }
+
+ /* Skip the pseudo-header. */
+ return (4 + ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL));
+}
+
+/*
+ * This is the top level routine of the printer. 'p' points
+ * to the ether header of the packet, '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.
+ */
+ ndo->ndo_protocol = "netanalyzer_transparent_if";
+ if (h->caplen < 12) {
+ nd_print_trunc(ndo);
+ return (h->caplen);
+ }
+
+ /* Skip the pseudo-header, preamble, and SOF. */
+ return (12 + ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL));
}
/*
int
ethertype_print(netdissect_options *ndo,
- u_short ether_type, const u_char *p,
- u_int length, u_int caplen)
+ u_short ether_type, const u_char *p,
+ u_int length, u_int caplen,
+ const struct lladdr_info *src, const struct lladdr_info *dst)
{
switch (ether_type) {
case ETHERTYPE_IP:
- ip_print(ndo, p, length);
+ 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);
+ arp_print(ndo, p, length, caplen);
return (1);
case ETHERTYPE_DN:
- decnet_print(/*ndo,*/p, length, caplen);
+ decnet_print(ndo, p, length, caplen);
return (1);
case ETHERTYPE_ATALK:
if (ndo->ndo_vflag)
- fputs("et1 ", stdout);
- atalk_print(/*ndo,*/p, length);
+ ND_PRINT("et1 ");
+ atalk_print(ndo, p, length);
return (1);
case ETHERTYPE_AARP:
- aarp_print(/*ndo,*/p, length);
+ aarp_print(ndo, p, length);
return (1);
case ETHERTYPE_IPX:
- ND_PRINT((ndo, "(NOV-ETHII) "));
- ipx_print(/*ndo,*/p, length);
+ ND_PRINT("(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_ISO:
+ if (length == 0 || caplen == 0) {
+ ndo->ndo_protocol = "isoclns";
+ nd_print_trunc(ndo);
+ return (1);
+ }
+ isoclns_print(ndo, p + 1, length - 1);
+ return(1);
case ETHERTYPE_PPPOED:
case ETHERTYPE_PPPOES:
case ETHERTYPE_PPPOED2:
case ETHERTYPE_PPPOES2:
- pppoe_print(/*ndo,*/p, length);
+ pppoe_print(ndo, p, length);
return (1);
case ETHERTYPE_EAPOL:
- eap_print(ndo, p, length);
+ eap_print(ndo, p, length);
return (1);
case ETHERTYPE_RRCP:
- rrcp_print(ndo, p - 14 , length + 14);
+ rrcp_print(ndo, p, length, src, dst);
return (1);
case ETHERTYPE_PPP:
if (length) {
- printf(": ");
- ppp_print(/*ndo,*/p, length);
+ ND_PRINT(": ");
+ ppp_print(ndo, p, length);
}
return (1);
case ETHERTYPE_MPCP:
- mpcp_print(/*ndo,*/p, length);
+ mpcp_print(ndo, p, length);
return (1);
case ETHERTYPE_SLOW:
- slow_print(/*ndo,*/p, length);
+ slow_print(ndo, p, length);
return (1);
case ETHERTYPE_CFM:
case ETHERTYPE_CFM_OLD:
- cfm_print(/*ndo,*/p, length);
+ cfm_print(ndo, p, length);
return (1);
case ETHERTYPE_LLDP:
- lldp_print(/*ndo,*/p, length);
+ lldp_print(ndo, p, length);
+ return (1);
+
+ case ETHERTYPE_NSH:
+ nsh_print(ndo, p, length);
return (1);
- case ETHERTYPE_LOOPBACK:
- return (1);
+ case ETHERTYPE_LOOPBACK:
+ loopback_print(ndo, p, length);
+ return (1);
case ETHERTYPE_MPLS:
case ETHERTYPE_MPLS_MULTI:
- mpls_print(/*ndo,*/p, length);
+ 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, length, src);
+ return (1);
+
+ case ETHERTYPE_CALM_FAST:
+ calm_fast_print(ndo, p, length, src);
+ return (1);
+
+ case ETHERTYPE_AOE:
+ aoe_print(ndo, p, length);
+ return (1);
+
+ case ETHERTYPE_MEDSA:
+ medsa_print(ndo, p, length, caplen, src, dst);
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:
- */
-
projects / tcpdump / blobdiff