mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-24 02:23:27 +08:00
0c93b15d38
It's a follow-up to commit 81dbf4a0b0.
There is no need to update ether_print(), ether_common_print() and
ether_switch_tag_print() to void functions: back to u_int functions.
There is also no need to add a flag parameter to ether_print(),
ether_common_print() and ether_switch_tag_print(): Remove it.
154 lines
4.3 KiB
C
154 lines
4.3 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: Broadcom Ethernet switches tag (4 bytes) printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include "netdissect.h"
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#include "ethertype.h"
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#include "addrtoname.h"
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#include "extract.h"
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#define ETHER_TYPE_LEN 2
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#define BRCM_TAG_LEN 4
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#define BRCM_OPCODE_SHIFT 5
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#define BRCM_OPCODE_MASK 0x7
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/* Ingress fields */
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#define BRCM_IG_TC_SHIFT 2
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#define BRCM_IG_TC_MASK 0x7
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#define BRCM_IG_TE_MASK 0x3
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#define BRCM_IG_TS_SHIFT 7
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#define BRCM_IG_DSTMAP_MASK 0x1ff
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/* Egress fields */
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#define BRCM_EG_CID_MASK 0xff
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#define BRCM_EG_RC_MASK 0xff
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#define BRCM_EG_RC_RSVD (3 << 6)
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#define BRCM_EG_RC_EXCEPTION (1 << 5)
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#define BRCM_EG_RC_PROT_SNOOP (1 << 4)
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#define BRCM_EG_RC_PROT_TERM (1 << 3)
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#define BRCM_EG_RC_SWITCH (1 << 2)
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#define BRCM_EG_RC_MAC_LEARN (1 << 1)
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#define BRCM_EG_RC_MIRROR (1 << 0)
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#define BRCM_EG_TC_SHIFT 5
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#define BRCM_EG_TC_MASK 0x7
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#define BRCM_EG_PID_MASK 0x1f
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static const struct tok brcm_tag_te_values[] = {
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{ 0, "None" },
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{ 1, "Untag" },
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{ 2, "Header"},
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{ 3, "Reserved" },
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{ 0, NULL }
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};
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static const struct tok brcm_tag_rc_values[] = {
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{ 1, "mirror" },
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{ 2, "MAC learning" },
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{ 4, "switching" },
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{ 8, "prot term" },
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{ 16, "prot snoop" },
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{ 32, "exception" },
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{ 0, NULL }
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};
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static void
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brcm_tag_print(netdissect_options *ndo, const u_char *bp)
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{
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uint8_t tag[BRCM_TAG_LEN];
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uint16_t dst_map;
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unsigned int i;
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for (i = 0; i < BRCM_TAG_LEN; i++)
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tag[i] = GET_U_1(bp + i);
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ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG");
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if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) {
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/* Ingress Broadcom tag */
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ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) &
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BRCM_IG_TC_MASK);
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ND_PRINT(", TE: %s",
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tok2str(brcm_tag_te_values, "unknown",
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(tag[1] & BRCM_IG_TE_MASK)));
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ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT);
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dst_map = (uint16_t)tag[2] << 8 | tag[3];
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ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK);
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} else {
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/* Egress Broadcom tag */
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ND_PRINT(", CID: %d", tag[1]);
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ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values,
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"reserved", tag[2]));
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ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) &
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BRCM_EG_TC_MASK);
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ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK);
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}
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ND_PRINT(", ");
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}
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void
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brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
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const u_char *p)
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{
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u_int caplen = h->caplen;
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u_int length = h->len;
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ndo->ndo_protocol = "brcm-tag";
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ndo->ndo_ll_hdr_len +=
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ether_switch_tag_print(ndo, p, length, caplen,
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brcm_tag_print, BRCM_TAG_LEN);
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}
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void
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brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
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const u_char *p)
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{
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u_int caplen = h->caplen;
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u_int length = h->len;
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ndo->ndo_protocol = "brcm-tag-prepend";
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if (caplen < BRCM_TAG_LEN) {
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ndo->ndo_ll_hdr_len += caplen;
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nd_print_trunc(ndo);
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return;
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}
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if (ndo->ndo_eflag) {
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/* Print the prepended Broadcom tag. */
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brcm_tag_print(ndo, p);
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}
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p += BRCM_TAG_LEN;
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length -= BRCM_TAG_LEN;
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caplen -= BRCM_TAG_LEN;
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/*
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* Now print the Ethernet frame following it.
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*/
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ndo->ndo_ll_hdr_len +=
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ether_print(ndo, p, length, caplen, NULL, NULL);
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}
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