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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ethernet.h>
#include <sys/vlan.h>
#include <net/trill.h>
#include <snoop.h>
int
interpret_trill(int flags, struct ether_header **e, char *data, int *alen)
{
trill_header_t *trillhdr;
struct ether_header *inner_ethhdr;
struct ether_vlan_header *inner_ethvlanhdr;
uint16_t ethertype;
int dlen = *alen;
size_t optslen;
size_t trillhdrlen;
if (dlen < sizeof (trill_header_t)) {
(void) snprintf(get_sum_line(), MAXLINE,
"TRILL (short packet)");
return (0);
}
trillhdr = (trill_header_t *)data;
optslen = GET_TRILL_OPTS_LEN(trillhdr) * sizeof (uint32_t);
if (flags & F_DTAIL) {
show_header("TRILL: ", "TRILL Data Frame", dlen);
show_space();
(void) snprintf(get_line(0, 0), get_line_remain(),
"Egress nickname = %d",
ntohs(trillhdr->th_egressnick));
(void) snprintf(get_line(0, 0), get_line_remain(),
"Ingress nickname = %d",
ntohs(trillhdr->th_ingressnick));
(void) snprintf(get_line(0, 0), get_line_remain(),
"Hop count = %d", trillhdr->th_hopcount);
(void) snprintf(get_line(0, 0), get_line_remain(),
"Multi-destination = %d", trillhdr->th_multidest);
(void) snprintf(get_line(0, 0), get_line_remain(),
"Options Len = %d bytes", optslen);
show_trailer();
}
trillhdrlen = sizeof (trill_header_t) + optslen;
if (dlen < trillhdrlen) {
(void) snprintf(get_sum_line(), MAXLINE,
"TRILL (options truncated)");
return (0);
}
dlen -= trillhdrlen;
if (dlen < sizeof (struct ether_header)) {
(void) snprintf(get_sum_line(), MAXLINE,
"TRILL (missing required inner MAC)");
return (0);
}
inner_ethhdr = (struct ether_header *)(data + trillhdrlen);
if (inner_ethhdr->ether_type != htons(ETHERTYPE_VLAN)) {
(void) snprintf(get_sum_line(), MAXLINE,
"TRILL (inner VLAN missing; ethertype %X)",
ntohs(inner_ethhdr->ether_type));
return (0);
}
inner_ethvlanhdr = (struct ether_vlan_header *)inner_ethhdr;
ethertype = ntohs(inner_ethvlanhdr->ether_type);
if (flags & F_SUM) {
(void) snprintf(get_sum_line(), MAXLINE,
"TRILL D:%d S:%d HC:%d M:%d O:%d L:%d VLAN:%d %s",
ntohs(trillhdr->th_egressnick),
ntohs(trillhdr->th_ingressnick),
trillhdr->th_hopcount,
trillhdr->th_multidest,
optslen,
dlen, VLAN_ID(inner_ethvlanhdr->ether_tci),
print_ethertype(ethertype));
}
*alen = dlen;
*e = inner_ethhdr;
return (ethertype);
}
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