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3 * The Regents of the University of California. All rights reserved.
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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
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15 * or promote products derived from this software without specific prior
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.
22 /* \summary: Broadcom Ethernet switches tag (4 bytes) printer */
28 #include "netdissect-stdinc.h"
30 #define ND_LONGJMP_FROM_TCHECK
31 #include "netdissect.h"
32 #include "ethertype.h"
33 #include "addrtoname.h"
36 #define ETHER_TYPE_LEN 2
38 #define BRCM_TAG_LEN 4
39 #define BRCM_OPCODE_SHIFT 5
40 #define BRCM_OPCODE_MASK 0x7
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
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
63 static const struct tok brcm_tag_te_values[] = {
71 static const struct tok brcm_tag_rc_values[] = {
73 { 2, "MAC learning" },
82 brcm_tag_print(netdissect_options *ndo, const u_char *bp)
84 uint8_t tag[BRCM_TAG_LEN];
88 for (i = 0; i < BRCM_TAG_LEN; i++)
89 tag[i] = GET_U_1(bp + i);
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) &
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);
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) &
109 ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK);
115 brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
118 u_int caplen = h->caplen;
119 u_int length = h->len;
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);
128 brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
131 u_int caplen = h->caplen;
132 u_int length = h->len;
134 ndo->ndo_protocol = "brcm-tag-prepend";
135 ND_TCHECK_LEN(p, BRCM_TAG_LEN);
136 ndo->ndo_ll_hdr_len += BRCM_TAG_LEN;
138 if (ndo->ndo_eflag) {
139 /* Print the prepended Broadcom tag. */
140 brcm_tag_print(ndo, p);
143 length -= BRCM_TAG_LEN;
144 caplen -= BRCM_TAG_LEN;
147 * Now print the Ethernet frame following it.
149 ndo->ndo_ll_hdr_len +=
150 ether_print(ndo, p, length, caplen, NULL, NULL);