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)
{
const struct ether_header *ehp;
uint16_t length_type;
ehp = (const struct ether_header *)bp;
ND_PRINT("%s > %s",
- etheraddr_string(ndo, ehp->ether_shost),
- etheraddr_string(ndo, ehp->ether_dhost));
+ etheraddr_string(ndo, ehp->ether_shost),
+ etheraddr_string(ndo, ehp->ether_dhost));
- length_type = EXTRACT_BE_U_2(ehp->ether_length_type);
+ length_type = GET_BE_U_2(bp + (hdrlen - sizeof(ehp->ether_length_type)));
if (!ndo->ndo_qflag) {
- if (length_type <= MAX_ETHERNET_LENGTH_VAL) {
- ND_PRINT(", 802.3");
+ 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");
+ 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(", %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.
*/
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)
+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)
{
const struct ether_header *ehp;
u_int orig_length;
u_short length_type;
- u_int hdrlen;
int llc_hdrlen;
struct lladdr_info src, dst;
- ndo->ndo_protocol = "ether";
- if (caplen < ETHER_HDRLEN) {
+ /* Unless specified otherwise, assume a standard Ethernet header */
+ if (hdrlen == ETHER_HDRLEN)
+ ndo->ndo_protocol = "ether";
+
+ if (caplen < hdrlen) {
nd_print_trunc(ndo);
return (caplen);
}
- if (length < ETHER_HDRLEN) {
+ 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;
+ length -= hdrlen;
+ caplen -= hdrlen;
ehp = (const struct ether_header *)p;
- p += ETHER_HDRLEN;
- hdrlen = ETHER_HDRLEN;
+ p += hdrlen;
src.addr = ehp->ether_shost;
src.addr_string = etheraddr_string;
dst.addr = ehp->ether_dhost;
dst.addr_string = etheraddr_string;
- length_type = EXTRACT_BE_U_2(ehp->ether_length_type);
+ length_type = GET_BE_U_2((const u_char *)ehp + (hdrlen - sizeof(ehp->ether_length_type)));
recurse:
/*
}
hdrlen += llc_hdrlen;
} else if (length_type == ETHERTYPE_8021Q ||
- length_type == ETHERTYPE_8021Q9100 ||
- length_type == ETHERTYPE_8021Q9200 ||
- length_type == ETHERTYPE_8021QinQ) {
+ 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.
nd_print_trunc(ndo);
return (hdrlen + length);
}
- if (ndo->ndo_eflag) {
- uint16_t tag = EXTRACT_BE_U_2(p);
+ if (ndo->ndo_eflag) {
+ uint16_t tag = GET_BE_U_2(p);
ND_PRINT("%s, ", ieee8021q_tci_string(tag));
}
- length_type = EXTRACT_BE_U_2(p + 2);
+ 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;
if (!ndo->ndo_eflag) {
if (print_encap_header != NULL)
(*print_encap_header)(ndo, encap_header_arg);
- ether_hdr_print(ndo, (const u_char *)ehp, orig_length);
+ ether_hdr_print(ndo, (const u_char *)ehp, orig_length,
+ hdrlen);
}
if (!ndo->ndo_suppress_default_print)
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->len' is the length
*/
u_int
ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
- const u_char *p)
+ const u_char *p)
{
ndo->ndo_protocol = "ether_if";
return (ether_print(ndo, p, h->len, h->caplen, NULL, NULL));
*/
u_int
netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
- const u_char *p)
+ const u_char *p)
{
/*
* Fail if we don't have enough data for the Hilscher pseudo-header.
*/
u_int
netanalyzer_transparent_if_print(netdissect_options *ndo,
- const struct pcap_pkthdr *h,
- const u_char *p)
+ const struct pcap_pkthdr *h,
+ const u_char *p)
{
/*
* Fail if we don't have enough data for the Hilscher pseudo-header,
int
ethertype_print(netdissect_options *ndo,
- u_short ether_type, const u_char *p,
- u_int length, u_int caplen,
- const struct lladdr_info *src, const struct lladdr_info *dst)
+ 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);
case ETHERTYPE_IPV6:
case ETHERTYPE_ARP:
case ETHERTYPE_REVARP:
- arp_print(ndo, p, length, caplen);
+ arp_print(ndo, p, length, caplen);
return (1);
case ETHERTYPE_DN:
return (1);
case ETHERTYPE_EAPOL:
- eap_print(ndo, p, length);
+ eap_print(ndo, p, length);
return (1);
case ETHERTYPE_RRCP:
- rrcp_print(ndo, p, length, src, dst);
+ rrcp_print(ndo, p, length, src, dst);
return (1);
case ETHERTYPE_PPP:
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:
lldp_print(ndo, p, length);
return (1);
- case ETHERTYPE_NSH:
- nsh_print(ndo, p, length);
- return (1);
+ case ETHERTYPE_NSH:
+ nsh_print(ndo, p, length);
+ return (1);
- case ETHERTYPE_LOOPBACK:
+ case ETHERTYPE_LOOPBACK:
loopback_print(ndo, p, length);
- return (1);
+ return (1);
case ETHERTYPE_MPLS:
case ETHERTYPE_MPLS_MULTI:
msnlb_print(ndo, p);
return (1);
- case ETHERTYPE_GEONET_OLD:
- case ETHERTYPE_GEONET:
- geonet_print(ndo, p, length, src);
- 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_CALM_FAST:
+ calm_fast_print(ndo, p, length, src);
+ return (1);
case ETHERTYPE_AOE:
aoe_print(ndo, p, length);
projects / tcpdump / blobdiff