| /* |
| * 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); |
| } |