diff options
| -rw-r--r-- | ethertype.h | 8 | ||||
| -rw-r--r-- | gencode.c | 72 | ||||
| -rw-r--r-- | gencode.h | 3 | ||||
| -rw-r--r-- | grammar.y | 6 | ||||
| -rw-r--r-- | ppp.h | 5 | ||||
| -rw-r--r-- | scanner.l | 3 |
6 files changed, 89 insertions, 8 deletions
diff --git a/ethertype.h b/ethertype.h index 3e75a96..9344e2c 100644 --- a/ethertype.h +++ b/ethertype.h @@ -18,7 +18,7 @@ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * - * @(#) $Header: /tcpdump/master/libpcap/ethertype.h,v 1.12 2001-01-14 21:26:52 guy Exp $ (LBL) + * @(#) $Header: /tcpdump/master/libpcap/ethertype.h,v 1.13 2004-06-16 08:20:28 hannes Exp $ (LBL) */ /* @@ -102,6 +102,12 @@ #ifndef ETHERTYPE_IPV6 #define ETHERTYPE_IPV6 0x86dd #endif +#ifndef ETHERTYPE_MPLS +#define ETHERTYPE_MPLS 0x8847 +#endif +#ifndef ETHERTYPE_MPLS_MULTI +#define ETHERTYPE_MPLS_MULTI 0x8848 +#endif #ifndef ETHERTYPE_LOOPBACK #define ETHERTYPE_LOOPBACK 0x9000 #endif @@ -21,7 +21,7 @@ */ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.204 2004-04-07 18:43:29 guy Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.205 2004-06-16 08:20:29 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -97,7 +97,7 @@ static const char rcsid[] _U_ = static jmp_buf top_ctx; static pcap_t *bpf_pcap; -/* Hack for updating VLAN offsets. */ +/* Hack for updating VLAN, MPLS offsets. */ static u_int orig_linktype = -1U, orig_nl = -1U, orig_nl_nosnap = -1U; /* XXX */ @@ -5279,6 +5279,74 @@ gen_vlan(vlan_num) return (b0); } +/* + * support for MPLS + */ +struct block * +gen_mpls(label_num) + int label_num; +{ + struct block *b0; + + /* + * Change the offsets to point to the type and data fields within + * the MPLS packet. This is somewhat of a kludge. + */ + if (orig_nl == (u_int)-1) { + orig_linktype = off_linktype; /* save original values */ + orig_nl = off_nl; + orig_nl_nosnap = off_nl_nosnap; + + switch (linktype) { + + case DLT_EN10MB: + off_linktype = 16; + off_nl_nosnap = 18; + off_nl = 18; + + b0 = gen_cmp(orig_linktype, BPF_H, (bpf_int32)ETHERTYPE_MPLS); + break; + + case DLT_PPP: + off_linktype = 6; + off_nl_nosnap = 8; + off_nl = 8; + + b0 = gen_cmp(orig_linktype, BPF_H, (bpf_int32)PPP_MPLS_UCAST); + break; + + case DLT_C_HDLC: + off_linktype = 6; + off_nl_nosnap = 8; + off_nl = 8; + + b0 = gen_cmp(orig_linktype, BPF_H, (bpf_int32)ETHERTYPE_MPLS); + break; + + /* FIXME add other DLT_s ... + * for Frame-Relay/and ATM this may get messy due to SNAP headers + * leave it for now */ + + default: + bpf_error("no MPLS support for data link type %d", + linktype); + /*NOTREACHED*/ + } + } + + /* If a specific MPLS label is requested, check it */ + if (label_num >= 0) { + struct block *b1; + + label_num = label_num << 12; /* label is shifted 12 bits on the wire */ + b1 = gen_mcmp(orig_nl, BPF_H, (bpf_int32)label_num, 0xfffff000); /* only compare the first 20 bits */ + gen_and(b0, b1); + b0 = b1; + } + + return (b0); +} + struct block * gen_atmfield_code(atmfield, jvalue, jtype, reverse) int atmfield; @@ -18,7 +18,7 @@ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * - * @(#) $Header: /tcpdump/master/libpcap/gencode.h,v 1.59 2004-03-28 20:27:14 fenner Exp $ (LBL) + * @(#) $Header: /tcpdump/master/libpcap/gencode.h,v 1.60 2004-06-16 08:20:30 hannes Exp $ (LBL) */ /* @@ -273,6 +273,7 @@ struct block *gen_multicast(int); struct block *gen_inbound(int); struct block *gen_vlan(int); +struct block *gen_mpls(int); struct block *gen_atmfield_code(int atmfield, bpf_u_int32 jvalue, bpf_u_int32 jtype, int reverse); struct block *gen_atmtype_abbrev(int type); @@ -22,7 +22,7 @@ */ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/grammar.y,v 1.82 2004-03-28 20:27:14 fenner Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/grammar.y,v 1.83 2004-06-16 08:20:29 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -128,7 +128,7 @@ pcap_parse() %token LSH RSH %token LEN %token IPV6 ICMPV6 AH ESP -%token VLAN +%token VLAN MPLS %token ISO ESIS CLNP ISIS L1 L2 IIH LSP SNP CSNP PSNP %token STP %token IPX @@ -324,6 +324,8 @@ other: pqual TK_BROADCAST { $$ = gen_broadcast($1); } | OUTBOUND { $$ = gen_inbound(1); } | VLAN pnum { $$ = gen_vlan($2); } | VLAN { $$ = gen_vlan(-1); } + | MPLS pnum { $$ = gen_mpls($2); } + | MPLS { $$ = gen_mpls(-1); } | pfvar { $$ = $1; } ; @@ -1,4 +1,4 @@ -/* @(#) $Header: /tcpdump/master/libpcap/ppp.h,v 1.8 1999-10-19 15:18:31 itojun Exp $ (LBL) */ +/* @(#) $Header: /tcpdump/master/libpcap/ppp.h,v 1.9 2004-06-16 08:20:28 hannes Exp $ (LBL) */ /* * Point to Point Protocol (PPP) RFC1331 * @@ -35,6 +35,8 @@ #define PPP_HELLO 0x0201 /* 802.1d Hello Packets */ #define PPP_LUXCOM 0x0231 /* Luxcom */ #define PPP_SNS 0x0233 /* Sigma Network Systems */ +#define PPP_MPLS_UCAST 0x0281 /* rfc 3032 */ +#define PPP_MPLS_MCAST 0x0283 /* rfc 3022 */ #define PPP_IPCP 0x8021 /* IP Control Protocol */ #define PPP_OSICP 0x8023 /* OSI Network Layer Control Protocol */ @@ -45,6 +47,7 @@ #define PPP_STIICP 0x8033 /* Strean Protocol Control Protocol */ #define PPP_VINESCP 0x8035 /* Banyan Vines Control Protocol */ #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ +#define PPP_MPLSCP 0x8281 /* rfc 3022 */ #define PPP_LCP 0xc021 /* Link Control Protocol */ #define PPP_PAP 0xc023 /* Password Authentication Protocol */ @@ -22,7 +22,7 @@ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.98 2004-03-28 20:27:16 fenner Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.99 2004-06-16 08:20:28 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -260,6 +260,7 @@ inbound return INBOUND; outbound return OUTBOUND; vlan return VLAN; +mpls return MPLS; lane return LANE; llc return LLC; |