1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 /* \summary: Broadcom Ethernet switches tag (4 bytes) printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include <config.h> 26 #endif 27 28 #include "netdissect-stdinc.h" 29 30 #define ND_LONGJMP_FROM_TCHECK 31 #include "netdissect.h" 32 #include "ethertype.h" 33 #include "addrtoname.h" 34 #include "extract.h" 35 36 #define ETHER_TYPE_LEN 2 37 38 #define BRCM_TAG_LEN 4 39 #define BRCM_OPCODE_SHIFT 5 40 #define BRCM_OPCODE_MASK 0x7 41 42 /* Ingress fields */ 43 #define BRCM_IG_TC_SHIFT 2 44 #define BRCM_IG_TC_MASK 0x7 45 #define BRCM_IG_TE_MASK 0x3 46 #define BRCM_IG_TS_SHIFT 7 47 #define BRCM_IG_DSTMAP_MASK 0x1ff 48 49 /* Egress fields */ 50 #define BRCM_EG_CID_MASK 0xff 51 #define BRCM_EG_RC_MASK 0xff 52 #define BRCM_EG_RC_RSVD (3 << 6) 53 #define BRCM_EG_RC_EXCEPTION (1 << 5) 54 #define BRCM_EG_RC_PROT_SNOOP (1 << 4) 55 #define BRCM_EG_RC_PROT_TERM (1 << 3) 56 #define BRCM_EG_RC_SWITCH (1 << 2) 57 #define BRCM_EG_RC_MAC_LEARN (1 << 1) 58 #define BRCM_EG_RC_MIRROR (1 << 0) 59 #define BRCM_EG_TC_SHIFT 5 60 #define BRCM_EG_TC_MASK 0x7 61 #define BRCM_EG_PID_MASK 0x1f 62 63 static const struct tok brcm_tag_te_values[] = { 64 { 0, "None" }, 65 { 1, "Untag" }, 66 { 2, "Header"}, 67 { 3, "Reserved" }, 68 { 0, NULL } 69 }; 70 71 static const struct tok brcm_tag_rc_values[] = { 72 { 1, "mirror" }, 73 { 2, "MAC learning" }, 74 { 4, "switching" }, 75 { 8, "prot term" }, 76 { 16, "prot snoop" }, 77 { 32, "exception" }, 78 { 0, NULL } 79 }; 80 81 static void 82 brcm_tag_print(netdissect_options *ndo, const u_char *bp) 83 { 84 uint8_t tag[BRCM_TAG_LEN]; 85 uint16_t dst_map; 86 unsigned int i; 87 88 for (i = 0; i < BRCM_TAG_LEN; i++) 89 tag[i] = GET_U_1(bp + i); 90 91 ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG"); 92 if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) { 93 /* Ingress Broadcom tag */ 94 ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) & 95 BRCM_IG_TC_MASK); 96 ND_PRINT(", TE: %s", 97 tok2str(brcm_tag_te_values, "unknown", 98 (tag[1] & BRCM_IG_TE_MASK))); 99 ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT); 100 dst_map = (uint16_t)tag[2] << 8 | tag[3]; 101 ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK); 102 } else { 103 /* Egress Broadcom tag */ 104 ND_PRINT(", CID: %d", tag[1]); 105 ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values, 106 "reserved", tag[2])); 107 ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) & 108 BRCM_EG_TC_MASK); 109 ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK); 110 } 111 ND_PRINT(", "); 112 } 113 114 void 115 brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 116 const u_char *p) 117 { 118 u_int caplen = h->caplen; 119 u_int length = h->len; 120 121 ndo->ndo_protocol = "brcm-tag"; 122 ndo->ndo_ll_hdr_len += 123 ether_switch_tag_print(ndo, p, length, caplen, 124 brcm_tag_print, BRCM_TAG_LEN); 125 } 126 127 void 128 brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 129 const u_char *p) 130 { 131 u_int caplen = h->caplen; 132 u_int length = h->len; 133 134 ndo->ndo_protocol = "brcm-tag-prepend"; 135 ND_TCHECK_LEN(p, BRCM_TAG_LEN); 136 ndo->ndo_ll_hdr_len += BRCM_TAG_LEN; 137 138 if (ndo->ndo_eflag) { 139 /* Print the prepended Broadcom tag. */ 140 brcm_tag_print(ndo, p); 141 } 142 p += BRCM_TAG_LEN; 143 length -= BRCM_TAG_LEN; 144 caplen -= BRCM_TAG_LEN; 145 146 /* 147 * Now print the Ethernet frame following it. 148 */ 149 ndo->ndo_ll_hdr_len += 150 ether_print(ndo, p, length, caplen, NULL, NULL); 151 } 152