1*ed775ee7SAntonio Huete Jimenez /*
2*ed775ee7SAntonio Huete Jimenez * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3*ed775ee7SAntonio Huete Jimenez * The Regents of the University of California. All rights reserved.
4*ed775ee7SAntonio Huete Jimenez *
5*ed775ee7SAntonio Huete Jimenez * Redistribution and use in source and binary forms, with or without
6*ed775ee7SAntonio Huete Jimenez * modification, are permitted provided that: (1) source code distributions
7*ed775ee7SAntonio Huete Jimenez * retain the above copyright notice and this paragraph in its entirety, (2)
8*ed775ee7SAntonio Huete Jimenez * distributions including binary code include the above copyright notice and
9*ed775ee7SAntonio Huete Jimenez * this paragraph in its entirety in the documentation or other materials
10*ed775ee7SAntonio Huete Jimenez * provided with the distribution, and (3) all advertising materials mentioning
11*ed775ee7SAntonio Huete Jimenez * features or use of this software display the following acknowledgement:
12*ed775ee7SAntonio Huete Jimenez * ``This product includes software developed by the University of California,
13*ed775ee7SAntonio Huete Jimenez * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14*ed775ee7SAntonio Huete Jimenez * the University nor the names of its contributors may be used to endorse
15*ed775ee7SAntonio Huete Jimenez * or promote products derived from this software without specific prior
16*ed775ee7SAntonio Huete Jimenez * written permission.
17*ed775ee7SAntonio Huete Jimenez * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18*ed775ee7SAntonio Huete Jimenez * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19*ed775ee7SAntonio Huete Jimenez * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20*ed775ee7SAntonio Huete Jimenez */
21*ed775ee7SAntonio Huete Jimenez
22*ed775ee7SAntonio Huete Jimenez /* \summary: Broadcom Ethernet switches tag (4 bytes) printer */
23*ed775ee7SAntonio Huete Jimenez
24*ed775ee7SAntonio Huete Jimenez #ifdef HAVE_CONFIG_H
25*ed775ee7SAntonio Huete Jimenez #include <config.h>
26*ed775ee7SAntonio Huete Jimenez #endif
27*ed775ee7SAntonio Huete Jimenez
28*ed775ee7SAntonio Huete Jimenez #include "netdissect-stdinc.h"
29*ed775ee7SAntonio Huete Jimenez
30*ed775ee7SAntonio Huete Jimenez #define ND_LONGJMP_FROM_TCHECK
31*ed775ee7SAntonio Huete Jimenez #include "netdissect.h"
32*ed775ee7SAntonio Huete Jimenez #include "ethertype.h"
33*ed775ee7SAntonio Huete Jimenez #include "addrtoname.h"
34*ed775ee7SAntonio Huete Jimenez #include "extract.h"
35*ed775ee7SAntonio Huete Jimenez
36*ed775ee7SAntonio Huete Jimenez #define ETHER_TYPE_LEN 2
37*ed775ee7SAntonio Huete Jimenez
38*ed775ee7SAntonio Huete Jimenez #define BRCM_TAG_LEN 4
39*ed775ee7SAntonio Huete Jimenez #define BRCM_OPCODE_SHIFT 5
40*ed775ee7SAntonio Huete Jimenez #define BRCM_OPCODE_MASK 0x7
41*ed775ee7SAntonio Huete Jimenez
42*ed775ee7SAntonio Huete Jimenez /* Ingress fields */
43*ed775ee7SAntonio Huete Jimenez #define BRCM_IG_TC_SHIFT 2
44*ed775ee7SAntonio Huete Jimenez #define BRCM_IG_TC_MASK 0x7
45*ed775ee7SAntonio Huete Jimenez #define BRCM_IG_TE_MASK 0x3
46*ed775ee7SAntonio Huete Jimenez #define BRCM_IG_TS_SHIFT 7
47*ed775ee7SAntonio Huete Jimenez #define BRCM_IG_DSTMAP_MASK 0x1ff
48*ed775ee7SAntonio Huete Jimenez
49*ed775ee7SAntonio Huete Jimenez /* Egress fields */
50*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_CID_MASK 0xff
51*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_MASK 0xff
52*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_RSVD (3 << 6)
53*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_EXCEPTION (1 << 5)
54*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_PROT_SNOOP (1 << 4)
55*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_PROT_TERM (1 << 3)
56*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_SWITCH (1 << 2)
57*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_MAC_LEARN (1 << 1)
58*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_RC_MIRROR (1 << 0)
59*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_TC_SHIFT 5
60*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_TC_MASK 0x7
61*ed775ee7SAntonio Huete Jimenez #define BRCM_EG_PID_MASK 0x1f
62*ed775ee7SAntonio Huete Jimenez
63*ed775ee7SAntonio Huete Jimenez static const struct tok brcm_tag_te_values[] = {
64*ed775ee7SAntonio Huete Jimenez { 0, "None" },
65*ed775ee7SAntonio Huete Jimenez { 1, "Untag" },
66*ed775ee7SAntonio Huete Jimenez { 2, "Header"},
67*ed775ee7SAntonio Huete Jimenez { 3, "Reserved" },
68*ed775ee7SAntonio Huete Jimenez { 0, NULL }
69*ed775ee7SAntonio Huete Jimenez };
70*ed775ee7SAntonio Huete Jimenez
71*ed775ee7SAntonio Huete Jimenez static const struct tok brcm_tag_rc_values[] = {
72*ed775ee7SAntonio Huete Jimenez { 1, "mirror" },
73*ed775ee7SAntonio Huete Jimenez { 2, "MAC learning" },
74*ed775ee7SAntonio Huete Jimenez { 4, "switching" },
75*ed775ee7SAntonio Huete Jimenez { 8, "prot term" },
76*ed775ee7SAntonio Huete Jimenez { 16, "prot snoop" },
77*ed775ee7SAntonio Huete Jimenez { 32, "exception" },
78*ed775ee7SAntonio Huete Jimenez { 0, NULL }
79*ed775ee7SAntonio Huete Jimenez };
80*ed775ee7SAntonio Huete Jimenez
81*ed775ee7SAntonio Huete Jimenez static void
brcm_tag_print(netdissect_options * ndo,const u_char * bp)82*ed775ee7SAntonio Huete Jimenez brcm_tag_print(netdissect_options *ndo, const u_char *bp)
83*ed775ee7SAntonio Huete Jimenez {
84*ed775ee7SAntonio Huete Jimenez uint8_t tag[BRCM_TAG_LEN];
85*ed775ee7SAntonio Huete Jimenez uint16_t dst_map;
86*ed775ee7SAntonio Huete Jimenez unsigned int i;
87*ed775ee7SAntonio Huete Jimenez
88*ed775ee7SAntonio Huete Jimenez for (i = 0; i < BRCM_TAG_LEN; i++)
89*ed775ee7SAntonio Huete Jimenez tag[i] = GET_U_1(bp + i);
90*ed775ee7SAntonio Huete Jimenez
91*ed775ee7SAntonio Huete Jimenez ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG");
92*ed775ee7SAntonio Huete Jimenez if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) {
93*ed775ee7SAntonio Huete Jimenez /* Ingress Broadcom tag */
94*ed775ee7SAntonio Huete Jimenez ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) &
95*ed775ee7SAntonio Huete Jimenez BRCM_IG_TC_MASK);
96*ed775ee7SAntonio Huete Jimenez ND_PRINT(", TE: %s",
97*ed775ee7SAntonio Huete Jimenez tok2str(brcm_tag_te_values, "unknown",
98*ed775ee7SAntonio Huete Jimenez (tag[1] & BRCM_IG_TE_MASK)));
99*ed775ee7SAntonio Huete Jimenez ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT);
100*ed775ee7SAntonio Huete Jimenez dst_map = (uint16_t)tag[2] << 8 | tag[3];
101*ed775ee7SAntonio Huete Jimenez ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK);
102*ed775ee7SAntonio Huete Jimenez } else {
103*ed775ee7SAntonio Huete Jimenez /* Egress Broadcom tag */
104*ed775ee7SAntonio Huete Jimenez ND_PRINT(", CID: %d", tag[1]);
105*ed775ee7SAntonio Huete Jimenez ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values,
106*ed775ee7SAntonio Huete Jimenez "reserved", tag[2]));
107*ed775ee7SAntonio Huete Jimenez ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) &
108*ed775ee7SAntonio Huete Jimenez BRCM_EG_TC_MASK);
109*ed775ee7SAntonio Huete Jimenez ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK);
110*ed775ee7SAntonio Huete Jimenez }
111*ed775ee7SAntonio Huete Jimenez ND_PRINT(", ");
112*ed775ee7SAntonio Huete Jimenez }
113*ed775ee7SAntonio Huete Jimenez
114*ed775ee7SAntonio Huete Jimenez void
brcm_tag_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)115*ed775ee7SAntonio Huete Jimenez brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
116*ed775ee7SAntonio Huete Jimenez const u_char *p)
117*ed775ee7SAntonio Huete Jimenez {
118*ed775ee7SAntonio Huete Jimenez u_int caplen = h->caplen;
119*ed775ee7SAntonio Huete Jimenez u_int length = h->len;
120*ed775ee7SAntonio Huete Jimenez
121*ed775ee7SAntonio Huete Jimenez ndo->ndo_protocol = "brcm-tag";
122*ed775ee7SAntonio Huete Jimenez ndo->ndo_ll_hdr_len +=
123*ed775ee7SAntonio Huete Jimenez ether_switch_tag_print(ndo, p, length, caplen,
124*ed775ee7SAntonio Huete Jimenez brcm_tag_print, BRCM_TAG_LEN);
125*ed775ee7SAntonio Huete Jimenez }
126*ed775ee7SAntonio Huete Jimenez
127*ed775ee7SAntonio Huete Jimenez void
brcm_tag_prepend_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)128*ed775ee7SAntonio Huete Jimenez brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
129*ed775ee7SAntonio Huete Jimenez const u_char *p)
130*ed775ee7SAntonio Huete Jimenez {
131*ed775ee7SAntonio Huete Jimenez u_int caplen = h->caplen;
132*ed775ee7SAntonio Huete Jimenez u_int length = h->len;
133*ed775ee7SAntonio Huete Jimenez
134*ed775ee7SAntonio Huete Jimenez ndo->ndo_protocol = "brcm-tag-prepend";
135*ed775ee7SAntonio Huete Jimenez ND_TCHECK_LEN(p, BRCM_TAG_LEN);
136*ed775ee7SAntonio Huete Jimenez ndo->ndo_ll_hdr_len += BRCM_TAG_LEN;
137*ed775ee7SAntonio Huete Jimenez
138*ed775ee7SAntonio Huete Jimenez if (ndo->ndo_eflag) {
139*ed775ee7SAntonio Huete Jimenez /* Print the prepended Broadcom tag. */
140*ed775ee7SAntonio Huete Jimenez brcm_tag_print(ndo, p);
141*ed775ee7SAntonio Huete Jimenez }
142*ed775ee7SAntonio Huete Jimenez p += BRCM_TAG_LEN;
143*ed775ee7SAntonio Huete Jimenez length -= BRCM_TAG_LEN;
144*ed775ee7SAntonio Huete Jimenez caplen -= BRCM_TAG_LEN;
145*ed775ee7SAntonio Huete Jimenez
146*ed775ee7SAntonio Huete Jimenez /*
147*ed775ee7SAntonio Huete Jimenez * Now print the Ethernet frame following it.
148*ed775ee7SAntonio Huete Jimenez */
149*ed775ee7SAntonio Huete Jimenez ndo->ndo_ll_hdr_len +=
150*ed775ee7SAntonio Huete Jimenez ether_print(ndo, p, length, caplen, NULL, NULL);
151*ed775ee7SAntonio Huete Jimenez }
152