diff options
author | fenner <fenner@FreeBSD.org> | 2002-06-21 00:43:23 +0000 |
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committer | fenner <fenner@FreeBSD.org> | 2002-06-21 00:43:23 +0000 |
commit | 91fc581e384bca8ae8831d23b70ab73ab0dc1a21 (patch) | |
tree | 89431945035dbd4a9ce74e63c4a1f65ed4166a1a /contrib/tcpdump/print-mpls.c | |
parent | f815ae37f4671c581fdc1c6f99a8490a6dfbb4f6 (diff) | |
download | FreeBSD-src-91fc581e384bca8ae8831d23b70ab73ab0dc1a21.zip FreeBSD-src-91fc581e384bca8ae8831d23b70ab73ab0dc1a21.tar.gz |
Import tcpdump 3.7.1, from
http://www.tcpdump.org/release/tcpdump-3.7.1.tar.gz
Diffstat (limited to 'contrib/tcpdump/print-mpls.c')
-rw-r--r-- | contrib/tcpdump/print-mpls.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-mpls.c b/contrib/tcpdump/print-mpls.c new file mode 100644 index 0000000..eb03705 --- /dev/null +++ b/contrib/tcpdump/print-mpls.c @@ -0,0 +1,123 @@ +/* + * Copyright (C) 2001 WIDE Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /tcpdump/master/tcpdump/print-mpls.c,v 1.2 2001/06/26 06:24:57 guy Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> + +#include <netinet/in.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "addrtoname.h" +#include "interface.h" +#include "extract.h" /* must come after interface.h */ + +#define LABEL_MASK 0xfffff000 +#define LABEL_SHIFT 12 +#define EXP_MASK 0x00000e00 +#define EXP_SHIFT 9 +#define STACK_MASK 0x00000100 +#define STACK_SHIFT 8 +#define TTL_MASK 0x000000ff +#define TTL_SHIFT 0 + +#define MPLS_LABEL(x) (((x) & LABEL_MASK) >> LABEL_SHIFT) +#define MPLS_EXP(x) (((x) & EXP_MASK) >> EXP_SHIFT) +#define MPLS_STACK(x) (((x) & STACK_MASK) >> STACK_SHIFT) +#define MPLS_TTL(x) (((x) & TTL_MASK) >> TTL_SHIFT) + +static const char *mpls_labelname[] = { +/*0*/ "IPv4 explicit NULL", "router alert", "IPv6 explicit NULL", + "implicit NULL", "rsvd", +/*5*/ "rsvd", "rsvd", "rsvd", "rsvd", "rsvd", +/*10*/ "rsvd", "rsvd", "rsvd", "rsvd", "rsvd", +/*15*/ "rsvd", +}; + +/* + * RFC3032: MPLS label stack encoding + */ +void +mpls_print(const u_char *bp, u_int length) +{ + const u_char *p; + u_int32_t v; + + p = bp; + printf("MPLS"); + TCHECK2(*p, sizeof(v)); + memcpy(&v, p, sizeof(v)); + v = (u_int32_t)ntohl(v); + printf(" ("); /*)*/ + printf("label 0x%x", MPLS_LABEL(v)); + if (vflag && + MPLS_LABEL(v) < sizeof(mpls_labelname) / sizeof(mpls_labelname[0])) + printf("(%s)", mpls_labelname[MPLS_LABEL(v)]); + if (MPLS_EXP(v)) + printf(" exp 0x%x", MPLS_EXP(v)); + if (MPLS_STACK(v)) + printf("[S]"); + printf(" TTL %u", MPLS_TTL(v)); + /*(*/ + printf(")"); + + p += sizeof(v); + + switch (MPLS_LABEL(v)) { + case 0: /* IPv4 explicit NULL label */ + ip_print(p, length - (p - bp)); + break; +#ifdef INET6 + case 2: /* IPv6 explicit NULL label */ + ip6_print(p, length - (p - bp)); + break; +#endif + default: + /* + * Since there's no indication of protocol in MPLS label + * encoding, we can print nothing further. + */ + return; + } + +trunc: + printf("[|MPLS]"); +} |