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 #include <config.h> 25 26 #include "netdissect-stdinc.h" 27 28 #define ND_LONGJMP_FROM_TCHECK 29 #include "netdissect.h" 30 #include "addrtoname.h" 31 #include "extract.h" 32 33 #define ETHER_TYPE_LEN 2 34 35 #define BRCM_TAG_LEN 4 36 #define BRCM_OPCODE_SHIFT 5 37 #define BRCM_OPCODE_MASK 0x7 38 39 /* Ingress fields */ 40 #define BRCM_IG_TC_SHIFT 2 41 #define BRCM_IG_TC_MASK 0x7 42 #define BRCM_IG_TE_MASK 0x3 43 #define BRCM_IG_TS_SHIFT 7 44 #define BRCM_IG_DSTMAP_MASK 0x1ff 45 46 /* Egress fields */ 47 #define BRCM_EG_CID_MASK 0xff 48 #define BRCM_EG_RC_MASK 0xff 49 #define BRCM_EG_RC_RSVD (3 << 6) 50 #define BRCM_EG_RC_EXCEPTION (1 << 5) 51 #define BRCM_EG_RC_PROT_SNOOP (1 << 4) 52 #define BRCM_EG_RC_PROT_TERM (1 << 3) 53 #define BRCM_EG_RC_SWITCH (1 << 2) 54 #define BRCM_EG_RC_MAC_LEARN (1 << 1) 55 #define BRCM_EG_RC_MIRROR (1 << 0) 56 #define BRCM_EG_TC_SHIFT 5 57 #define BRCM_EG_TC_MASK 0x7 58 #define BRCM_EG_PID_MASK 0x1f 59 60 static const struct tok brcm_tag_te_values[] = { 61 { 0, "None" }, 62 { 1, "Untag" }, 63 { 2, "Header"}, 64 { 3, "Reserved" }, 65 { 0, NULL } 66 }; 67 68 static const struct tok brcm_tag_rc_values[] = { 69 { 1, "mirror" }, 70 { 2, "MAC learning" }, 71 { 4, "switching" }, 72 { 8, "prot term" }, 73 { 16, "prot snoop" }, 74 { 32, "exception" }, 75 { 0, NULL } 76 }; 77 78 static void 79 brcm_tag_print(netdissect_options *ndo, const u_char *bp) 80 { 81 uint8_t tag[BRCM_TAG_LEN]; 82 uint16_t dst_map; 83 unsigned int i; 84 85 for (i = 0; i < BRCM_TAG_LEN; i++) 86 tag[i] = GET_U_1(bp + i); 87 88 ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG"); 89 if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) { 90 /* Ingress Broadcom tag */ 91 ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) & 92 BRCM_IG_TC_MASK); 93 ND_PRINT(", TE: %s", 94 tok2str(brcm_tag_te_values, "unknown", 95 (tag[1] & BRCM_IG_TE_MASK))); 96 ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT); 97 dst_map = (uint16_t)tag[2] << 8 | tag[3]; 98 ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK); 99 } else { 100 /* Egress Broadcom tag */ 101 ND_PRINT(", CID: %d", tag[1]); 102 ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values, 103 "reserved", tag[2])); 104 ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) & 105 BRCM_EG_TC_MASK); 106 ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK); 107 } 108 ND_PRINT(", "); 109 } 110 111 void 112 brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 113 const u_char *p) 114 { 115 u_int caplen = h->caplen; 116 u_int length = h->len; 117 118 ndo->ndo_protocol = "brcm-tag"; 119 ndo->ndo_ll_hdr_len += 120 ether_switch_tag_print(ndo, p, length, caplen, 121 brcm_tag_print, BRCM_TAG_LEN); 122 } 123 124 void 125 brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 126 const u_char *p) 127 { 128 u_int caplen = h->caplen; 129 u_int length = h->len; 130 131 ndo->ndo_protocol = "brcm-tag-prepend"; 132 ND_TCHECK_LEN(p, BRCM_TAG_LEN); 133 ndo->ndo_ll_hdr_len += BRCM_TAG_LEN; 134 135 if (ndo->ndo_eflag) { 136 /* Print the prepended Broadcom tag. */ 137 brcm_tag_print(ndo, p); 138 } 139 p += BRCM_TAG_LEN; 140 length -= BRCM_TAG_LEN; 141 caplen -= BRCM_TAG_LEN; 142 143 /* 144 * Now print the Ethernet frame following it. 145 */ 146 ndo->ndo_ll_hdr_len += 147 ether_print(ndo, p, length, caplen, NULL, NULL); 148 } 149