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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
* 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.
*/
/* \summary: Broadcom Ethernet switches tag (4 bytes) printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "ethertype.h"
#include "addrtoname.h"
#include "extract.h"
#define ETHER_TYPE_LEN 2
#define BRCM_TAG_LEN 4
#define BRCM_OPCODE_SHIFT 5
#define BRCM_OPCODE_MASK 0x7
/* Ingress fields */
#define BRCM_IG_TC_SHIFT 2
#define BRCM_IG_TC_MASK 0x7
#define BRCM_IG_TE_MASK 0x3
#define BRCM_IG_TS_SHIFT 7
#define BRCM_IG_DSTMAP_MASK 0x1ff
/* Egress fields */
#define BRCM_EG_CID_MASK 0xff
#define BRCM_EG_RC_MASK 0xff
#define BRCM_EG_RC_RSVD (3 << 6)
#define BRCM_EG_RC_EXCEPTION (1 << 5)
#define BRCM_EG_RC_PROT_SNOOP (1 << 4)
#define BRCM_EG_RC_PROT_TERM (1 << 3)
#define BRCM_EG_RC_SWITCH (1 << 2)
#define BRCM_EG_RC_MAC_LEARN (1 << 1)
#define BRCM_EG_RC_MIRROR (1 << 0)
#define BRCM_EG_TC_SHIFT 5
#define BRCM_EG_TC_MASK 0x7
#define BRCM_EG_PID_MASK 0x1f
static const struct tok brcm_tag_te_values[] = {
{ 0, "None" },
{ 1, "Untag" },
{ 2, "Header"},
{ 3, "Reserved" },
{ 0, NULL }
};
static const struct tok brcm_tag_rc_values[] = {
{ 1, "mirror" },
{ 2, "MAC learning" },
{ 4, "switching" },
{ 8, "prot term" },
{ 16, "prot snoop" },
{ 32, "exception" },
{ 0, NULL }
};
static void
brcm_tag_print(netdissect_options *ndo, const u_char *bp)
{
uint8_t tag[BRCM_TAG_LEN];
uint16_t dst_map;
unsigned int i;
for (i = 0; i < BRCM_TAG_LEN; i++)
tag[i] = GET_U_1(bp + i);
ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG");
if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) {
/* Ingress Broadcom tag */
ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) &
BRCM_IG_TC_MASK);
ND_PRINT(", TE: %s",
tok2str(brcm_tag_te_values, "unknown",
(tag[1] & BRCM_IG_TE_MASK)));
ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT);
dst_map = (uint16_t)tag[2] << 8 | tag[3];
ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK);
} else {
/* Egress Broadcom tag */
ND_PRINT(", CID: %d", tag[1]);
ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values,
"reserved", tag[2]));
ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) &
BRCM_EG_TC_MASK);
ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK);
}
ND_PRINT(", ");
}
void
brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
ndo->ndo_protocol = "brcm-tag";
ndo->ndo_ll_hdr_len +=
ether_switch_tag_print(ndo, p, length, caplen,
brcm_tag_print, BRCM_TAG_LEN);
}
void
brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
ndo->ndo_protocol = "brcm-tag-prepend";
ND_TCHECK_LEN(p, BRCM_TAG_LEN);
ndo->ndo_ll_hdr_len += BRCM_TAG_LEN;
if (ndo->ndo_eflag) {
/* Print the prepended Broadcom tag. */
brcm_tag_print(ndo, p);
}
p += BRCM_TAG_LEN;
length -= BRCM_TAG_LEN;
caplen -= BRCM_TAG_LEN;
/*
* Now print the Ethernet frame following it.
*/
ndo->ndo_ll_hdr_len +=
ether_print(ndo, p, length, caplen, NULL, NULL);
}
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