1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdio.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <sys/ethernet.h>
31 #include <sys/vlan.h>
32 #include <net/trill.h>
33
34 #include <snoop.h>
35
36 int
interpret_trill(int flags,struct ether_header ** e,char * data,int * alen)37 interpret_trill(int flags, struct ether_header **e, char *data, int *alen)
38 {
39 trill_header_t *trillhdr;
40 struct ether_header *inner_ethhdr;
41 struct ether_vlan_header *inner_ethvlanhdr;
42 uint16_t ethertype;
43 int dlen = *alen;
44 size_t optslen;
45 size_t trillhdrlen;
46
47 if (dlen < sizeof (trill_header_t)) {
48 (void) snprintf(get_sum_line(), MAXLINE,
49 "TRILL (short packet)");
50 return (0);
51 }
52
53 trillhdr = (trill_header_t *)data;
54 optslen = GET_TRILL_OPTS_LEN(trillhdr) * sizeof (uint32_t);
55
56 if (flags & F_DTAIL) {
57 show_header("TRILL: ", "TRILL Data Frame", dlen);
58 show_space();
59
60 (void) snprintf(get_line(0, 0), get_line_remain(),
61 "Egress nickname = %d",
62 ntohs(trillhdr->th_egressnick));
63 (void) snprintf(get_line(0, 0), get_line_remain(),
64 "Ingress nickname = %d",
65 ntohs(trillhdr->th_ingressnick));
66 (void) snprintf(get_line(0, 0), get_line_remain(),
67 "Hop count = %d", trillhdr->th_hopcount);
68 (void) snprintf(get_line(0, 0), get_line_remain(),
69 "Multi-destination = %d", trillhdr->th_multidest);
70 (void) snprintf(get_line(0, 0), get_line_remain(),
71 "Options Len = %d bytes", optslen);
72 show_trailer();
73 }
74
75 trillhdrlen = sizeof (trill_header_t) + optslen;
76
77 if (dlen < trillhdrlen) {
78 (void) snprintf(get_sum_line(), MAXLINE,
79 "TRILL (options truncated)");
80 return (0);
81 }
82
83 dlen -= trillhdrlen;
84
85 if (dlen < sizeof (struct ether_header)) {
86 (void) snprintf(get_sum_line(), MAXLINE,
87 "TRILL (missing required inner MAC)");
88 return (0);
89 }
90
91 inner_ethhdr = (struct ether_header *)(data + trillhdrlen);
92 if (inner_ethhdr->ether_type != htons(ETHERTYPE_VLAN)) {
93 (void) snprintf(get_sum_line(), MAXLINE,
94 "TRILL (inner VLAN missing; ethertype %X)",
95 ntohs(inner_ethhdr->ether_type));
96 return (0);
97 }
98
99 inner_ethvlanhdr = (struct ether_vlan_header *)inner_ethhdr;
100 ethertype = ntohs(inner_ethvlanhdr->ether_type);
101
102 if (flags & F_SUM) {
103 (void) snprintf(get_sum_line(), MAXLINE,
104 "TRILL D:%d S:%d HC:%d M:%d O:%d L:%d VLAN:%d %s",
105 ntohs(trillhdr->th_egressnick),
106 ntohs(trillhdr->th_ingressnick),
107 trillhdr->th_hopcount,
108 trillhdr->th_multidest,
109 optslen,
110 dlen, VLAN_ID(inner_ethvlanhdr->ether_tci),
111 print_ethertype(ethertype));
112 }
113
114 *alen = dlen;
115 *e = inner_ethhdr;
116 return (ethertype);
117 }
118