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Diffstat (limited to 'contrib/tcpdump/print-ppp.c')
-rw-r--r-- | contrib/tcpdump/print-ppp.c | 1757 |
1 files changed, 0 insertions, 1757 deletions
diff --git a/contrib/tcpdump/print-ppp.c b/contrib/tcpdump/print-ppp.c deleted file mode 100644 index 1e99c15..0000000 --- a/contrib/tcpdump/print-ppp.c +++ /dev/null @@ -1,1757 +0,0 @@ -/* - * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that: (1) source code distributions - * retain the above copyright notice and this paragraph in its entirety, (2) - * distributions including binary code include the above copyright notice and - * this paragraph in its entirety in the documentation or other materials - * provided with the distribution, and (3) all advertising materials mentioning - * features or use of this software display the following acknowledgement: - * ``This product includes software developed by the University of California, - * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of - * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - * - * Extensively modified by Motonori Shindo (mshindo@mshindo.net) for more - * complete PPP support. - */ - -/* - * TODO: - * o resolve XXX as much as possible - * o MP support - * o BAP support - */ - -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.108.2.6 2005/12/05 11:40:36 hannes Exp $ (LBL)"; -#endif - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <tcpdump-stdinc.h> - -#ifdef __bsdi__ -#include <net/slcompress.h> -#include <net/if_ppp.h> -#endif - -#include <pcap.h> -#include <stdio.h> -#include <stdlib.h> - -#include "interface.h" -#include "extract.h" -#include "addrtoname.h" -#include "ppp.h" -#include "chdlc.h" -#include "ethertype.h" -#include "oui.h" - -/* - * The following constatns are defined by IANA. Please refer to - * http://www.isi.edu/in-notes/iana/assignments/ppp-numbers - * for the up-to-date information. - */ - -/* Protocol Codes defined in ppp.h */ - -struct tok ppptype2str[] = { - { PPP_IP, "IP" }, - { PPP_OSI, "OSI" }, - { PPP_NS, "NS" }, - { PPP_DECNET, "DECNET" }, - { PPP_APPLE, "APPLE" }, - { PPP_IPX, "IPX" }, - { PPP_VJC, "VJC IP" }, - { PPP_VJNC, "VJNC IP" }, - { PPP_BRPDU, "BRPDU" }, - { PPP_STII, "STII" }, - { PPP_VINES, "VINES" }, - { PPP_MPLS_UCAST, "MPLS" }, - { PPP_MPLS_MCAST, "MPLS" }, - { PPP_COMP, "Compressed"}, - { PPP_ML, "MLPPP"}, - { PPP_IPV6, "IP6"}, - - { PPP_HELLO, "HELLO" }, - { PPP_LUXCOM, "LUXCOM" }, - { PPP_SNS, "SNS" }, - { PPP_IPCP, "IPCP" }, - { PPP_OSICP, "OSICP" }, - { PPP_NSCP, "NSCP" }, - { PPP_DECNETCP, "DECNETCP" }, - { PPP_APPLECP, "APPLECP" }, - { PPP_IPXCP, "IPXCP" }, - { PPP_STIICP, "STIICP" }, - { PPP_VINESCP, "VINESCP" }, - { PPP_IPV6CP, "IP6CP" }, - { PPP_MPLSCP, "MPLSCP" }, - - { PPP_LCP, "LCP" }, - { PPP_PAP, "PAP" }, - { PPP_LQM, "LQM" }, - { PPP_CHAP, "CHAP" }, - { PPP_EAP, "EAP" }, - { PPP_SPAP, "SPAP" }, - { PPP_SPAP_OLD, "Old-SPAP" }, - { PPP_BACP, "BACP" }, - { PPP_BAP, "BAP" }, - { PPP_MPCP, "MLPPP-CP" }, - { 0, NULL } -}; - -/* Control Protocols (LCP/IPCP/CCP etc.) Codes defined in RFC 1661 */ - -#define CPCODES_VEXT 0 /* Vendor-Specific (RFC2153) */ -#define CPCODES_CONF_REQ 1 /* Configure-Request */ -#define CPCODES_CONF_ACK 2 /* Configure-Ack */ -#define CPCODES_CONF_NAK 3 /* Configure-Nak */ -#define CPCODES_CONF_REJ 4 /* Configure-Reject */ -#define CPCODES_TERM_REQ 5 /* Terminate-Request */ -#define CPCODES_TERM_ACK 6 /* Terminate-Ack */ -#define CPCODES_CODE_REJ 7 /* Code-Reject */ -#define CPCODES_PROT_REJ 8 /* Protocol-Reject (LCP only) */ -#define CPCODES_ECHO_REQ 9 /* Echo-Request (LCP only) */ -#define CPCODES_ECHO_RPL 10 /* Echo-Reply (LCP only) */ -#define CPCODES_DISC_REQ 11 /* Discard-Request (LCP only) */ -#define CPCODES_ID 12 /* Identification (LCP only) RFC1570 */ -#define CPCODES_TIME_REM 13 /* Time-Remaining (LCP only) RFC1570 */ -#define CPCODES_RESET_REQ 14 /* Reset-Request (CCP only) RFC1962 */ -#define CPCODES_RESET_REP 15 /* Reset-Reply (CCP only) */ - -struct tok cpcodes[] = { - {CPCODES_VEXT, "Vendor-Extension"}, /* RFC2153 */ - {CPCODES_CONF_REQ, "Conf-Request"}, - {CPCODES_CONF_ACK, "Conf-Ack"}, - {CPCODES_CONF_NAK, "Conf-Nack"}, - {CPCODES_CONF_REJ, "Conf-Reject"}, - {CPCODES_TERM_REQ, "Term-Request"}, - {CPCODES_TERM_ACK, "Term-Ack"}, - {CPCODES_CODE_REJ, "Code-Reject"}, - {CPCODES_PROT_REJ, "Prot-Reject"}, - {CPCODES_ECHO_REQ, "Echo-Request"}, - {CPCODES_ECHO_RPL, "Echo-Reply"}, - {CPCODES_DISC_REQ, "Disc-Req"}, - {CPCODES_ID, "Ident"}, /* RFC1570 */ - {CPCODES_TIME_REM, "Time-Rem"}, /* RFC1570 */ - {CPCODES_RESET_REQ, "Reset-Req"}, /* RFC1962 */ - {CPCODES_RESET_REP, "Reset-Ack"}, /* RFC1962 */ - {0, NULL} -}; - -/* LCP Config Options */ - -#define LCPOPT_VEXT 0 -#define LCPOPT_MRU 1 -#define LCPOPT_ACCM 2 -#define LCPOPT_AP 3 -#define LCPOPT_QP 4 -#define LCPOPT_MN 5 -#define LCPOPT_DEP6 6 -#define LCPOPT_PFC 7 -#define LCPOPT_ACFC 8 -#define LCPOPT_FCSALT 9 -#define LCPOPT_SDP 10 -#define LCPOPT_NUMMODE 11 -#define LCPOPT_DEP12 12 -#define LCPOPT_CBACK 13 -#define LCPOPT_DEP14 14 -#define LCPOPT_DEP15 15 -#define LCPOPT_DEP16 16 -#define LCPOPT_MLMRRU 17 -#define LCPOPT_MLSSNHF 18 -#define LCPOPT_MLED 19 -#define LCPOPT_PROP 20 -#define LCPOPT_DCEID 21 -#define LCPOPT_MPP 22 -#define LCPOPT_LD 23 -#define LCPOPT_LCPAOPT 24 -#define LCPOPT_COBS 25 -#define LCPOPT_PE 26 -#define LCPOPT_MLHF 27 -#define LCPOPT_I18N 28 -#define LCPOPT_SDLOS 29 -#define LCPOPT_PPPMUX 30 - -#define LCPOPT_MIN LCPOPT_VEXT -#define LCPOPT_MAX LCPOPT_PPPMUX - -static const char *lcpconfopts[] = { - "Vend-Ext", /* (0) */ - "MRU", /* (1) */ - "ACCM", /* (2) */ - "Auth-Prot", /* (3) */ - "Qual-Prot", /* (4) */ - "Magic-Num", /* (5) */ - "deprecated(6)", /* used to be a Quality Protocol */ - "PFC", /* (7) */ - "ACFC", /* (8) */ - "FCS-Alt", /* (9) */ - "SDP", /* (10) */ - "Num-Mode", /* (11) */ - "deprecated(12)", /* used to be a Multi-Link-Procedure*/ - "Call-Back", /* (13) */ - "deprecated(14)", /* used to be a Connect-Time */ - "deprecated(15)", /* used to be a Compund-Frames */ - "deprecated(16)", /* used to be a Nominal-Data-Encap */ - "MRRU", /* (17) */ - "12-Bit seq #", /* (18) */ - "End-Disc", /* (19) */ - "Proprietary", /* (20) */ - "DCE-Id", /* (21) */ - "MP+", /* (22) */ - "Link-Disc", /* (23) */ - "LCP-Auth-Opt", /* (24) */ - "COBS", /* (25) */ - "Prefix-elision", /* (26) */ - "Multilink-header-Form",/* (27) */ - "I18N", /* (28) */ - "SDL-over-SONET/SDH", /* (29) */ - "PPP-Muxing", /* (30) */ -}; - -/* ECP - to be supported */ - -/* CCP Config Options */ - -#define CCPOPT_OUI 0 /* RFC1962 */ -#define CCPOPT_PRED1 1 /* RFC1962 */ -#define CCPOPT_PRED2 2 /* RFC1962 */ -#define CCPOPT_PJUMP 3 /* RFC1962 */ -/* 4-15 unassigned */ -#define CCPOPT_HPPPC 16 /* RFC1962 */ -#define CCPOPT_STACLZS 17 /* RFC1974 */ -#define CCPOPT_MPPC 18 /* RFC2118 */ -#define CCPOPT_GFZA 19 /* RFC1962 */ -#define CCPOPT_V42BIS 20 /* RFC1962 */ -#define CCPOPT_BSDCOMP 21 /* RFC1977 */ -/* 22 unassigned */ -#define CCPOPT_LZSDCP 23 /* RFC1967 */ -#define CCPOPT_MVRCA 24 /* RFC1975 */ -#define CCPOPT_DEC 25 /* RFC1976 */ -#define CCPOPT_DEFLATE 26 /* RFC1979 */ -/* 27-254 unassigned */ -#define CCPOPT_RESV 255 /* RFC1962 */ - -const struct tok ccpconfopts_values[] = { - { CCPOPT_OUI, "OUI" }, - { CCPOPT_PRED1, "Pred-1" }, - { CCPOPT_PRED2, "Pred-2" }, - { CCPOPT_PJUMP, "Puddle" }, - { CCPOPT_HPPPC, "HP-PPC" }, - { CCPOPT_STACLZS, "Stac-LZS" }, - { CCPOPT_MPPC, "MPPC" }, - { CCPOPT_GFZA, "Gand-FZA" }, - { CCPOPT_V42BIS, "V.42bis" }, - { CCPOPT_BSDCOMP, "BSD-Comp" }, - { CCPOPT_LZSDCP, "LZS-DCP" }, - { CCPOPT_MVRCA, "MVRCA" }, - { CCPOPT_DEC, "DEC" }, - { CCPOPT_DEFLATE, "Deflate" }, - { CCPOPT_RESV, "Reserved"}, - {0, NULL} -}; - -/* BACP Config Options */ - -#define BACPOPT_FPEER 1 /* RFC2125 */ - -const struct tok bacconfopts_values[] = { - { BACPOPT_FPEER, "Favored-Peer" }, - {0, NULL} -}; - - -/* SDCP - to be supported */ - -/* IPCP Config Options */ -#define IPCPOPT_2ADDR 1 /* RFC1172, RFC1332 (deprecated) */ -#define IPCPOPT_IPCOMP 2 /* RFC1332 */ -#define IPCPOPT_ADDR 3 /* RFC1332 */ -#define IPCPOPT_MOBILE4 4 /* RFC2290 */ -#define IPCPOPT_PRIDNS 129 /* RFC1877 */ -#define IPCPOPT_PRINBNS 130 /* RFC1877 */ -#define IPCPOPT_SECDNS 131 /* RFC1877 */ -#define IPCPOPT_SECNBNS 132 /* RFC1877 */ - -struct tok ipcpopt_values[] = { - { IPCPOPT_2ADDR, "IP-Addrs" }, - { IPCPOPT_IPCOMP, "IP-Comp" }, - { IPCPOPT_ADDR, "IP-Addr" }, - { IPCPOPT_MOBILE4, "Home-Addr" }, - { IPCPOPT_PRIDNS, "Pri-DNS" }, - { IPCPOPT_PRINBNS, "Pri-NBNS" }, - { IPCPOPT_SECDNS, "Sec-DNS" }, - { IPCPOPT_SECNBNS, "Sec-NBNS" }, - { 0, NULL } -}; - -#define IPCPOPT_IPCOMP_HDRCOMP 0x61 /* rfc3544 */ -#define IPCPOPT_IPCOMP_MINLEN 14 - -struct tok ipcpopt_compproto_values[] = { - { PPP_VJC, "VJ-Comp" }, - { IPCPOPT_IPCOMP_HDRCOMP, "IP Header Compression" }, - { 0, NULL } -}; - -struct tok ipcpopt_compproto_subopt_values[] = { - { 1, "RTP-Compression" }, - { 2, "Enhanced RTP-Compression" }, - { 0, NULL } -}; - -/* IP6CP Config Options */ -#define IP6CP_IFID 1 - -struct tok ip6cpopt_values[] = { - { IP6CP_IFID, "Interface-ID" }, - { 0, NULL } -}; - -/* ATCP - to be supported */ -/* OSINLCP - to be supported */ -/* BVCP - to be supported */ -/* BCP - to be supported */ -/* IPXCP - to be supported */ -/* MPLSCP - to be supported */ - -/* Auth Algorithms */ - -/* 0-4 Reserved (RFC1994) */ -#define AUTHALG_CHAPMD5 5 /* RFC1994 */ -#define AUTHALG_MSCHAP1 128 /* RFC2433 */ -#define AUTHALG_MSCHAP2 129 /* RFC2795 */ - -struct tok authalg_values[] = { - { AUTHALG_CHAPMD5, "MD5" }, - { AUTHALG_MSCHAP1, "MS-CHAPv1" }, - { AUTHALG_MSCHAP2, "MS-CHAPv2" }, - { 0, NULL } -}; - -/* FCS Alternatives - to be supported */ - -/* Multilink Endpoint Discriminator (RFC1717) */ -#define MEDCLASS_NULL 0 /* Null Class */ -#define MEDCLASS_LOCAL 1 /* Locally Assigned */ -#define MEDCLASS_IPV4 2 /* Internet Protocol (IPv4) */ -#define MEDCLASS_MAC 3 /* IEEE 802.1 global MAC address */ -#define MEDCLASS_MNB 4 /* PPP Magic Number Block */ -#define MEDCLASS_PSNDN 5 /* Public Switched Network Director Number */ - -/* PPP LCP Callback */ -#define CALLBACK_AUTH 0 /* Location determined by user auth */ -#define CALLBACK_DSTR 1 /* Dialing string */ -#define CALLBACK_LID 2 /* Location identifier */ -#define CALLBACK_E164 3 /* E.164 number */ -#define CALLBACK_X500 4 /* X.500 distinguished name */ -#define CALLBACK_CBCP 6 /* Location is determined during CBCP nego */ - -struct tok ppp_callback_values[] = { - { CALLBACK_AUTH, "UserAuth" }, - { CALLBACK_DSTR, "DialString" }, - { CALLBACK_LID, "LocalID" }, - { CALLBACK_E164, "E.164" }, - { CALLBACK_X500, "X.500" }, - { CALLBACK_CBCP, "CBCP" }, - { 0, NULL } -}; - -/* CHAP */ - -#define CHAP_CHAL 1 -#define CHAP_RESP 2 -#define CHAP_SUCC 3 -#define CHAP_FAIL 4 - -struct tok chapcode_values[] = { - { CHAP_CHAL, "Challenge" }, - { CHAP_RESP, "Response" }, - { CHAP_SUCC, "Success" }, - { CHAP_FAIL, "Fail" }, - { 0, NULL} -}; - -/* PAP */ - -#define PAP_AREQ 1 -#define PAP_AACK 2 -#define PAP_ANAK 3 - -struct tok papcode_values[] = { - { PAP_AREQ, "Auth-Req" }, - { PAP_AACK, "Auth-ACK" }, - { PAP_ANAK, "Auth-NACK" }, - { 0, NULL } -}; - -/* BAP */ -#define BAP_CALLREQ 1 -#define BAP_CALLRES 2 -#define BAP_CBREQ 3 -#define BAP_CBRES 4 -#define BAP_LDQREQ 5 -#define BAP_LDQRES 6 -#define BAP_CSIND 7 -#define BAP_CSRES 8 - -static void handle_ctrl_proto (u_int proto,const u_char *p, int length); -static void handle_chap (const u_char *p, int length); -static void handle_pap (const u_char *p, int length); -static void handle_bap (const u_char *p, int length); -static void handle_mlppp(const u_char *p, int length); -static int print_lcp_config_options (const u_char *p, int); -static int print_ipcp_config_options (const u_char *p, int); -static int print_ip6cp_config_options (const u_char *p, int); -static int print_ccp_config_options (const u_char *p, int); -static int print_bacp_config_options (const u_char *p, int); -static void handle_ppp (u_int proto, const u_char *p, int length); -static void ppp_hdlc(const u_char *p, int length); - -/* generic Control Protocol (e.g. LCP, IPCP, CCP, etc.) handler */ -static void -handle_ctrl_proto(u_int proto, const u_char *pptr, int length) -{ - const char *typestr; - u_int code, len; - int (*pfunc)(const u_char *, int); - int x, j; - const u_char *tptr; - - tptr=pptr; - - typestr = tok2str(ppptype2str, "unknown ctrl-proto (0x%04x)", proto); - printf("%s, ",typestr); - - if (length < 4) /* FIXME weak boundary checking */ - goto trunc; - TCHECK2(*tptr, 2); - - code = *tptr++; - - printf("%s (0x%02x), id %u, length %u", - tok2str(cpcodes, "Unknown Opcode",code), - code, - *tptr++, /* ID */ - length+2); - - if (!vflag) - return; - - if (length <= 4) - return; /* there may be a NULL confreq etc. */ - - TCHECK2(*tptr, 2); - len = EXTRACT_16BITS(tptr); - tptr += 2; - - printf("\n\tencoded length %u (=Option(s) length %u)",len,len-4); - - if (vflag>1) - print_unknown_data(pptr-2,"\n\t",6); - - - switch (code) { - case CPCODES_VEXT: - if (length < 11) - break; - TCHECK2(*tptr, 4); - printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)); - tptr += 4; - TCHECK2(*tptr, 3); - printf(" Vendor: %s (%u)", - tok2str(oui_values,"Unknown",EXTRACT_24BITS(tptr)), - EXTRACT_24BITS(tptr)); - /* XXX: need to decode Kind and Value(s)? */ - break; - case CPCODES_CONF_REQ: - case CPCODES_CONF_ACK: - case CPCODES_CONF_NAK: - case CPCODES_CONF_REJ: - x = len - 4; /* Code(1), Identifier(1) and Length(2) */ - do { - switch (proto) { - case PPP_LCP: - pfunc = print_lcp_config_options; - break; - case PPP_IPCP: - pfunc = print_ipcp_config_options; - break; - case PPP_IPV6CP: - pfunc = print_ip6cp_config_options; - break; - case PPP_CCP: - pfunc = print_ccp_config_options; - break; - case PPP_BACP: - pfunc = print_bacp_config_options; - break; - default: - /* - * No print routine for the options for - * this protocol. - */ - pfunc = NULL; - break; - } - - if (pfunc == NULL) /* catch the above null pointer if unknown CP */ - break; - - if ((j = (*pfunc)(tptr, len)) == 0) - break; - x -= j; - tptr += j; - } while (x > 0); - break; - - case CPCODES_TERM_REQ: - case CPCODES_TERM_ACK: - /* XXX: need to decode Data? */ - break; - case CPCODES_CODE_REJ: - /* XXX: need to decode Rejected-Packet? */ - break; - case CPCODES_PROT_REJ: - if (length < 6) - break; - TCHECK2(*tptr, 2); - printf("\n\t Rejected %s Protocol (0x%04x)", - tok2str(ppptype2str,"unknown", EXTRACT_16BITS(tptr)), - EXTRACT_16BITS(tptr)); - /* XXX: need to decode Rejected-Information? - hexdump for now */ - if (len > 6) { - printf("\n\t Rejected Packet"); - print_unknown_data(tptr+2,"\n\t ",len-2); - } - break; - case CPCODES_ECHO_REQ: - case CPCODES_ECHO_RPL: - case CPCODES_DISC_REQ: - if (length < 8) - break; - TCHECK2(*tptr, 4); - printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)); - /* XXX: need to decode Data? - hexdump for now */ - if (len > 8) { - printf("\n\t -----trailing data-----"); - TCHECK2(tptr[4], len-8); - print_unknown_data(tptr+4,"\n\t ",len-8); - } - break; - case CPCODES_ID: - if (length < 8) - break; - TCHECK2(*tptr, 4); - printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)); - /* RFC 1661 says this is intended to be human readable */ - if (len > 8) { - printf("\n\t Message\n\t "); - fn_printn(tptr+4,len-4,snapend); - } - break; - case CPCODES_TIME_REM: - if (length < 12) - break; - TCHECK2(*tptr, 4); - printf("\n\t Magic-Num 0x%08x", EXTRACT_32BITS(tptr)); - TCHECK2(*(tptr + 4), 4); - printf(", Seconds-Remaining %us", EXTRACT_32BITS(tptr + 4)); - /* XXX: need to decode Message? */ - break; - default: - /* XXX this is dirty but we do not get the - * original pointer passed to the begin - * the PPP packet */ - if (vflag <= 1) - print_unknown_data(pptr-2,"\n\t ",length+2); - break; - } - return; - -trunc: - printf("[|%s]", typestr); -} - -/* LCP config options */ -static int -print_lcp_config_options(const u_char *p, int length) -{ - int len, opt; - - if (length < 2) - return 0; - TCHECK2(*p, 2); - len = p[1]; - opt = p[0]; - if (length < len) - return 0; - if (len < 2) { - if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX)) - printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", lcpconfopts[opt],opt,len); - else - printf("\n\tunknown LCP option 0x%02x", opt); - return 0; - } - if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX)) - printf("\n\t %s Option (0x%02x), length %u: ", lcpconfopts[opt],opt,len); - else { - printf("\n\tunknown LCP option 0x%02x", opt); - return len; - } - - switch (opt) { - case LCPOPT_VEXT: - if (len >= 6) { - TCHECK2(*(p + 2), 3); - printf("Vendor: %s (%u)", - tok2str(oui_values,"Unknown",EXTRACT_24BITS(p+2)), - EXTRACT_24BITS(p+2)); -#if 0 - TCHECK(p[5]); - printf(", kind: 0x%02x", p[5]); - printf(", Value: 0x") - for (i = 0; i < len - 6; i++) { - TCHECK(p[6 + i]); - printf("%02x", p[6 + i]); - } -#endif - } - break; - case LCPOPT_MRU: - if (len == 4) { - TCHECK2(*(p + 2), 2); - printf("%u", EXTRACT_16BITS(p + 2)); - } - break; - case LCPOPT_ACCM: - if (len == 6) { - TCHECK2(*(p + 2), 4); - printf("0x%08x", EXTRACT_32BITS(p + 2)); - } - break; - case LCPOPT_AP: - if (len >= 4) { - TCHECK2(*(p + 2), 2); - printf("%s", tok2str(ppptype2str,"Unknown Auth Proto (0x04x)",EXTRACT_16BITS(p+2))); - - switch (EXTRACT_16BITS(p+2)) { - case PPP_CHAP: - TCHECK(p[4]); - printf(", %s",tok2str(authalg_values,"Unknown Auth Alg %u",p[4])); - break; - case PPP_PAP: /* fall through */ - case PPP_EAP: - case PPP_SPAP: - case PPP_SPAP_OLD: - break; - default: - print_unknown_data(p,"\n\t",len); - } - } - break; - case LCPOPT_QP: - if (len >= 4) { - TCHECK2(*(p + 2), 2); - if (EXTRACT_16BITS(p+2) == PPP_LQM) - printf(" LQR"); - else - printf(" unknown"); - } - break; - case LCPOPT_MN: - if (len == 6) { - TCHECK2(*(p + 2), 4); - printf("0x%08x", EXTRACT_32BITS(p + 2)); - } - break; - case LCPOPT_PFC: - break; - case LCPOPT_ACFC: - break; - case LCPOPT_LD: - if (len == 4) { - TCHECK2(*(p + 2), 2); - printf("0x%04x", EXTRACT_16BITS(p + 2)); - } - break; - case LCPOPT_CBACK: - if (len < 3) - break; - TCHECK(p[2]); - printf("Callback Operation %s (%u)", - tok2str(ppp_callback_values,"Unknown",p[2]), - p[2]); - break; - case LCPOPT_MLMRRU: - if (len == 4) { - TCHECK2(*(p + 2), 2); - printf("%u", EXTRACT_16BITS(p + 2)); - } - break; - case LCPOPT_MLED: - if (len < 3) - break; - TCHECK(p[2]); - switch (p[2]) { /* class */ - case MEDCLASS_NULL: - printf("Null"); - break; - case MEDCLASS_LOCAL: - printf("Local"); /* XXX */ - break; - case MEDCLASS_IPV4: - if (len != 7) - break; - TCHECK2(*(p + 3), 4); - printf("IPv4 %s", ipaddr_string(p + 3)); - break; - case MEDCLASS_MAC: - if (len != 9) - break; - TCHECK(p[8]); - printf("MAC %02x:%02x:%02x:%02x:%02x:%02x", - p[3], p[4], p[5], p[6], p[7], p[8]); - break; - case MEDCLASS_MNB: - printf("Magic-Num-Block"); /* XXX */ - break; - case MEDCLASS_PSNDN: - printf("PSNDN"); /* XXX */ - break; - } - break; - -/* XXX: to be supported */ -#if 0 - case LCPOPT_DEP6: - case LCPOPT_FCSALT: - case LCPOPT_SDP: - case LCPOPT_NUMMODE: - case LCPOPT_DEP12: - case LCPOPT_DEP14: - case LCPOPT_DEP15: - case LCPOPT_DEP16: - case LCPOPT_MLSSNHF: - case LCPOPT_PROP: - case LCPOPT_DCEID: - case LCPOPT_MPP: - case LCPOPT_LCPAOPT: - case LCPOPT_COBS: - case LCPOPT_PE: - case LCPOPT_MLHF: - case LCPOPT_I18N: - case LCPOPT_SDLOS: - case LCPOPT_PPPMUX: - break; -#endif - default: - if(vflag<2) - print_unknown_data(&p[2],"\n\t ",len-2); - break; - } - - if (vflag>1) - print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */ - - return len; - -trunc: - printf("[|lcp]"); - return 0; -} - -/* ML-PPP*/ -struct tok ppp_ml_flag_values[] = { - { 0x80, "begin" }, - { 0x40, "end" }, - { 0, NULL } -}; - -static void -handle_mlppp(const u_char *p, int length) { - - if (!eflag) - printf("MLPPP, "); - - printf("seq 0x%03x, Flags [%s], length %u", - (EXTRACT_16BITS(p))&0x0fff, /* only support 12-Bit sequence space for now */ - bittok2str(ppp_ml_flag_values, "none", *p & 0xc0), - length); - - return; -} - -/* CHAP */ -static void -handle_chap(const u_char *p, int length) -{ - u_int code, len; - int val_size, name_size, msg_size; - const u_char *p0; - int i; - - p0 = p; - if (length < 1) { - printf("[|chap]"); - return; - } else if (length < 4) { - TCHECK(*p); - printf("[|chap 0x%02x]", *p); - return; - } - - TCHECK(*p); - code = *p; - printf("CHAP, %s (0x%02x)", - tok2str(chapcode_values,"unknown",code), - code); - p++; - - TCHECK(*p); - printf(", id %u", *p); /* ID */ - p++; - - TCHECK2(*p, 2); - len = EXTRACT_16BITS(p); - p += 2; - - /* - * Note that this is a generic CHAP decoding routine. Since we - * don't know which flavor of CHAP (i.e. CHAP-MD5, MS-CHAPv1, - * MS-CHAPv2) is used at this point, we can't decode packet - * specifically to each algorithms. Instead, we simply decode - * the GCD (Gratest Common Denominator) for all algorithms. - */ - switch (code) { - case CHAP_CHAL: - case CHAP_RESP: - if (length - (p - p0) < 1) - return; - TCHECK(*p); - val_size = *p; /* value size */ - p++; - if (length - (p - p0) < val_size) - return; - printf(", Value "); - for (i = 0; i < val_size; i++) { - TCHECK(*p); - printf("%02x", *p++); - } - name_size = len - (p - p0); - printf(", Name "); - for (i = 0; i < name_size; i++) { - TCHECK(*p); - safeputchar(*p++); - } - break; - case CHAP_SUCC: - case CHAP_FAIL: - msg_size = len - (p - p0); - printf(", Msg "); - for (i = 0; i< msg_size; i++) { - TCHECK(*p); - safeputchar(*p++); - } - break; - } - return; - -trunc: - printf("[|chap]"); -} - -/* PAP (see RFC 1334) */ -static void -handle_pap(const u_char *p, int length) -{ - u_int code, len; - int peerid_len, passwd_len, msg_len; - const u_char *p0; - int i; - - p0 = p; - if (length < 1) { - printf("[|pap]"); - return; - } else if (length < 4) { - TCHECK(*p); - printf("[|pap 0x%02x]", *p); - return; - } - - TCHECK(*p); - code = *p; - printf("PAP, %s (0x%02x)", - tok2str(papcode_values,"unknown",code), - code); - p++; - - TCHECK(*p); - printf(", id %u", *p); /* ID */ - p++; - - TCHECK2(*p, 2); - len = EXTRACT_16BITS(p); - p += 2; - - if ((int)len > length) { - printf(", length %u > packet size", len); - return; - } - length = len; - if (length < (p - p0)) { - printf(", length %u < PAP header length", length); - return; - } - - switch (code) { - case PAP_AREQ: - if (length - (p - p0) < 1) - return; - TCHECK(*p); - peerid_len = *p; /* Peer-ID Length */ - p++; - if (length - (p - p0) < peerid_len) - return; - printf(", Peer "); - for (i = 0; i < peerid_len; i++) { - TCHECK(*p); - safeputchar(*p++); - } - - if (length - (p - p0) < 1) - return; - TCHECK(*p); - passwd_len = *p; /* Password Length */ - p++; - if (length - (p - p0) < passwd_len) - return; - printf(", Name "); - for (i = 0; i < passwd_len; i++) { - TCHECK(*p); - safeputchar(*p++); - } - break; - case PAP_AACK: - case PAP_ANAK: - if (length - (p - p0) < 1) - return; - TCHECK(*p); - msg_len = *p; /* Msg-Length */ - p++; - if (length - (p - p0) < msg_len) - return; - printf(", Msg "); - for (i = 0; i< msg_len; i++) { - TCHECK(*p); - safeputchar(*p++); - } - break; - } - return; - -trunc: - printf("[|pap]"); -} - -/* BAP */ -static void -handle_bap(const u_char *p _U_, int length _U_) -{ - /* XXX: to be supported!! */ -} - - -/* IPCP config options */ -static int -print_ipcp_config_options(const u_char *p, int length) -{ - int len, opt; - u_int compproto, ipcomp_subopttotallen, ipcomp_subopt, ipcomp_suboptlen; - - if (length < 2) - return 0; - TCHECK2(*p, 2); - len = p[1]; - opt = p[0]; - if (length < len) - return 0; - if (len < 2) { - printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", - tok2str(ipcpopt_values,"unknown",opt), - opt, - len); - return 0; - } - - printf("\n\t %s Option (0x%02x), length %u: ", - tok2str(ipcpopt_values,"unknown",opt), - opt, - len); - - switch (opt) { - case IPCPOPT_2ADDR: /* deprecated */ - if (len != 10) - goto invlen; - TCHECK2(*(p + 6), 4); - printf("src %s, dst %s", - ipaddr_string(p + 2), - ipaddr_string(p + 6)); - break; - case IPCPOPT_IPCOMP: - if (len < 4) - goto invlen; - TCHECK2(*(p + 2), 2); - compproto = EXTRACT_16BITS(p+2); - - printf("%s (0x%02x):", - tok2str(ipcpopt_compproto_values,"Unknown",compproto), - compproto); - - switch (compproto) { - case PPP_VJC: - /* XXX: VJ-Comp parameters should be decoded */ - break; - case IPCPOPT_IPCOMP_HDRCOMP: - if (len < IPCPOPT_IPCOMP_MINLEN) - goto invlen; - - TCHECK2(*(p + 2), IPCPOPT_IPCOMP_MINLEN); - printf("\n\t TCP Space %u, non-TCP Space %u" \ - ", maxPeriod %u, maxTime %u, maxHdr %u", - EXTRACT_16BITS(p+4), - EXTRACT_16BITS(p+6), - EXTRACT_16BITS(p+8), - EXTRACT_16BITS(p+10), - EXTRACT_16BITS(p+12)); - - /* suboptions present ? */ - if (len > IPCPOPT_IPCOMP_MINLEN) { - ipcomp_subopttotallen = len - IPCPOPT_IPCOMP_MINLEN; - p += IPCPOPT_IPCOMP_MINLEN; - - printf("\n\t Suboptions, length %u", ipcomp_subopttotallen); - - while (ipcomp_subopttotallen >= 2) { - TCHECK2(*p, 2); - ipcomp_subopt = *p; - ipcomp_suboptlen = *(p+1); - - /* sanity check */ - if (ipcomp_subopt == 0 || - ipcomp_suboptlen == 0 ) - break; - - /* XXX: just display the suboptions for now */ - printf("\n\t\t%s Suboption #%u, length %u", - tok2str(ipcpopt_compproto_subopt_values, - "Unknown", - ipcomp_subopt), - ipcomp_subopt, - ipcomp_suboptlen); - - ipcomp_subopttotallen -= ipcomp_suboptlen; - p += ipcomp_suboptlen; - } - } - break; - default: - break; - } - break; - - case IPCPOPT_ADDR: /* those options share the same format - fall through */ - case IPCPOPT_MOBILE4: - case IPCPOPT_PRIDNS: - case IPCPOPT_PRINBNS: - case IPCPOPT_SECDNS: - case IPCPOPT_SECNBNS: - if (len != 6) - goto invlen; - TCHECK2(*(p + 2), 4); - printf("%s", ipaddr_string(p + 2)); - break; - default: - if(vflag<2) - print_unknown_data(&p[2],"\n\t ",len-2); - break; - } - if (vflag>1) - print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */ - return len; - -invlen: - printf(", invalid-length-%d", opt); - return 0; - -trunc: - printf("[|ipcp]"); - return 0; -} - -/* IP6CP config options */ -static int -print_ip6cp_config_options(const u_char *p, int length) -{ - int len, opt; - - if (length < 2) - return 0; - TCHECK2(*p, 2); - len = p[1]; - opt = p[0]; - if (length < len) - return 0; - if (len < 2) { - printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", - tok2str(ip6cpopt_values,"unknown",opt), - opt, - len); - return 0; - } - - printf("\n\t %s Option (0x%02x), length %u: ", - tok2str(ip6cpopt_values,"unknown",opt), - opt, - len); - - switch (opt) { - case IP6CP_IFID: - if (len != 10) - goto invlen; - TCHECK2(*(p + 2), 8); - printf("%04x:%04x:%04x:%04x", - EXTRACT_16BITS(p + 2), - EXTRACT_16BITS(p + 4), - EXTRACT_16BITS(p + 6), - EXTRACT_16BITS(p + 8)); - break; - default: - if(vflag<2) - print_unknown_data(&p[2],"\n\t ",len-2); - break; - } - if (vflag>1) - print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */ - - return len; - -invlen: - printf(", invalid-length-%d", opt); - return 0; - -trunc: - printf("[|ip6cp]"); - return 0; -} - - -/* CCP config options */ -static int -print_ccp_config_options(const u_char *p, int length) -{ - int len, opt; - - if (length < 2) - return 0; - TCHECK2(*p, 2); - len = p[1]; - opt = p[0]; - if (length < len) - return 0; - if (len < 2) { - printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", - tok2str(ccpconfopts_values, "Unknown", opt), - opt, - len); - return 0; - } - - printf("\n\t %s Option (0x%02x), length %u:", - tok2str(ccpconfopts_values, "Unknown", opt), - opt, - len); - - switch (opt) { - /* fall through --> default: nothing supported yet */ - case CCPOPT_OUI: - case CCPOPT_PRED1: - case CCPOPT_PRED2: - case CCPOPT_PJUMP: - case CCPOPT_HPPPC: - case CCPOPT_STACLZS: - case CCPOPT_MPPC: - case CCPOPT_GFZA: - case CCPOPT_V42BIS: - case CCPOPT_BSDCOMP: - case CCPOPT_LZSDCP: - case CCPOPT_MVRCA: - case CCPOPT_DEC: - case CCPOPT_DEFLATE: - case CCPOPT_RESV: - default: - if(vflag<2) - print_unknown_data(&p[2],"\n\t ",len-2); - break; - } - if (vflag>1) - print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */ - - return len; - -trunc: - printf("[|ccp]"); - return 0; -} - -/* BACP config options */ -static int -print_bacp_config_options(const u_char *p, int length) -{ - int len, opt; - - if (length < 2) - return 0; - TCHECK2(*p, 2); - len = p[1]; - opt = p[0]; - if (length < len) - return 0; - if (len < 2) { - printf("\n\t %s Option (0x%02x), length %u (bogus, should be >= 2)", - tok2str(bacconfopts_values, "Unknown", opt), - opt, - len); - return 0; - } - - printf("\n\t %s Option (0x%02x), length %u:", - tok2str(bacconfopts_values, "Unknown", opt), - opt, - len); - - switch (opt) { - case BACPOPT_FPEER: - TCHECK2(*(p + 2), 4); - printf(", Magic-Num 0x%08x", EXTRACT_32BITS(p + 2)); - break; - default: - if(vflag<2) - print_unknown_data(&p[2],"\n\t ",len-2); - break; - } - if (vflag>1) - print_unknown_data(&p[2],"\n\t ",len-2); /* exclude TLV header */ - - return len; - -trunc: - printf("[|bacp]"); - return 0; -} - - -static void -ppp_hdlc(const u_char *p, int length) -{ - u_char *b, *s, *t, c; - int i, proto; - const void *se; - - b = (u_int8_t *)malloc(length); - if (b == NULL) - return; - - /* - * Unescape all the data into a temporary, private, buffer. - * Do this so that we dont overwrite the original packet - * contents. - */ - for (s = (u_char *)p, t = b, i = length; i > 0; i--) { - c = *s++; - if (c == 0x7d) { - if (i > 1) { - i--; - c = *s++ ^ 0x20; - } else - continue; - } - *t++ = c; - } - - se = snapend; - snapend = t; - - /* now lets guess about the payload codepoint format */ - proto = *b; /* start with a one-octet codepoint guess */ - - switch (proto) { - case PPP_IP: - ip_print(gndo, b+1, t - b - 1); - goto cleanup; -#ifdef INET6 - case PPP_IPV6: - ip6_print(b+1, t - b - 1); - goto cleanup; -#endif - default: /* no luck - try next guess */ - break; - } - - proto = EXTRACT_16BITS(b); /* next guess - load two octets */ - - switch (proto) { - case (PPP_ADDRESS << 8 | PPP_CONTROL): /* looks like a PPP frame */ - proto = EXTRACT_16BITS(b+2); /* load the PPP proto-id */ - handle_ppp(proto, b+4, t - b - 4); - break; - default: /* last guess - proto must be a PPP proto-id */ - handle_ppp(proto, b+2, t - b - 2); - break; - } - -cleanup: - snapend = se; - free(b); - return; -} - - -/* PPP */ -static void -handle_ppp(u_int proto, const u_char *p, int length) -{ - if ((proto & 0xff00) == 0x7e00) {/* is this an escape code ? */ - ppp_hdlc(p-1, length); - return; - } - - switch (proto) { - case PPP_LCP: /* fall through */ - case PPP_IPCP: - case PPP_OSICP: - case PPP_MPLSCP: - case PPP_IPV6CP: - case PPP_CCP: - case PPP_BACP: - handle_ctrl_proto(proto, p, length); - break; - case PPP_ML: - handle_mlppp(p, length); - break; - case PPP_CHAP: - handle_chap(p, length); - break; - case PPP_PAP: - handle_pap(p, length); - break; - case PPP_BAP: /* XXX: not yet completed */ - handle_bap(p, length); - break; - case ETHERTYPE_IP: /*XXX*/ - case PPP_VJNC: - case PPP_IP: - ip_print(gndo, p, length); - break; -#ifdef INET6 - case ETHERTYPE_IPV6: /*XXX*/ - case PPP_IPV6: - ip6_print(p, length); - break; -#endif - case ETHERTYPE_IPX: /*XXX*/ - case PPP_IPX: - ipx_print(p, length); - break; - case PPP_OSI: - isoclns_print(p, length, length); - break; - case PPP_MPLS_UCAST: - case PPP_MPLS_MCAST: - mpls_print(p, length); - break; - case PPP_COMP: - printf("compressed PPP data"); - break; - default: - printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto)); - print_unknown_data(p,"\n\t",length); - break; - } -} - -/* Standard PPP printer */ -u_int -ppp_print(register const u_char *p, u_int length) -{ - u_int proto,ppp_header; - u_int olen = length; /* _o_riginal length */ - u_int hdr_len = 0; - - /* - * Here, we assume that p points to the Address and Control - * field (if they present). - */ - if (length < 2) - goto trunc; - TCHECK2(*p, 2); - ppp_header = EXTRACT_16BITS(p); - - switch(ppp_header) { - case (PPP_WITHDIRECTION_IN << 8 | PPP_CONTROL): - if (eflag) printf("In "); - p += 2; - length -= 2; - hdr_len += 2; - break; - case (PPP_WITHDIRECTION_OUT << 8 | PPP_CONTROL): - if (eflag) printf("Out "); - p += 2; - length -= 2; - hdr_len += 2; - break; - case (PPP_ADDRESS << 8 | PPP_CONTROL): - p += 2; /* ACFC not used */ - length -= 2; - hdr_len += 2; - break; - - default: - break; - } - - if (length < 2) - goto trunc; - TCHECK(*p); - if (*p % 2) { - proto = *p; /* PFC is used */ - p++; - length--; - hdr_len++; - } else { - TCHECK2(*p, 2); - proto = EXTRACT_16BITS(p); - p += 2; - length -= 2; - hdr_len += 2; - } - - if (eflag) - printf("%s (0x%04x), length %u: ", - tok2str(ppptype2str, "unknown", proto), - proto, - olen); - - handle_ppp(proto, p, length); - return (hdr_len); -trunc: - printf("[|ppp]"); - return (0); -} - - -/* PPP I/F printer */ -u_int -ppp_if_print(const struct pcap_pkthdr *h, register const u_char *p) -{ - register u_int length = h->len; - register u_int caplen = h->caplen; - - if (caplen < PPP_HDRLEN) { - printf("[|ppp]"); - return (caplen); - } - -#if 0 - /* - * XXX: seems to assume that there are 2 octets prepended to an - * actual PPP frame. The 1st octet looks like Input/Output flag - * while 2nd octet is unknown, at least to me - * (mshindo@mshindo.net). - * - * That was what the original tcpdump code did. - * - * FreeBSD's "if_ppp.c" *does* set the first octet to 1 for outbound - * packets and 0 for inbound packets - but only if the - * protocol field has the 0x8000 bit set (i.e., it's a network - * control protocol); it does so before running the packet through - * "bpf_filter" to see if it should be discarded, and to see - * if we should update the time we sent the most recent packet... - * - * ...but it puts the original address field back after doing - * so. - * - * NetBSD's "if_ppp.c" doesn't set the first octet in that fashion. - * - * I don't know if any PPP implementation handed up to a BPF - * device packets with the first octet being 1 for outbound and - * 0 for inbound packets, so I (guy@alum.mit.edu) don't know - * whether that ever needs to be checked or not. - * - * Note that NetBSD has a DLT_PPP_SERIAL, which it uses for PPP, - * and its tcpdump appears to assume that the frame always - * begins with an address field and a control field, and that - * the address field might be 0x0f or 0x8f, for Cisco - * point-to-point with HDLC framing as per section 4.3.1 of RFC - * 1547, as well as 0xff, for PPP in HDLC-like framing as per - * RFC 1662. - * - * (Is the Cisco framing in question what DLT_C_HDLC, in - * BSD/OS, is?) - */ - if (eflag) - printf("%c %4d %02x ", p[0] ? 'O' : 'I', length, p[1]); -#endif - - ppp_print(p, length); - - return (0); -} - -/* - * PPP I/F printer to use if we know that RFC 1662-style PPP in HDLC-like - * framing, or Cisco PPP with HDLC framing as per section 4.3.1 of RFC 1547, - * is being used (i.e., we don't check for PPP_ADDRESS and PPP_CONTROL, - * discard them *if* those are the first two octets, and parse the remaining - * packet as a PPP packet, as "ppp_print()" does). - * - * This handles, for example, DLT_PPP_SERIAL in NetBSD. - */ -u_int -ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p) -{ - register u_int length = h->len; - register u_int caplen = h->caplen; - u_int proto; - u_int hdrlen = 0; - - if (caplen < 2) { - printf("[|ppp]"); - return (caplen); - } - - switch (p[0]) { - - case PPP_ADDRESS: - if (caplen < 4) { - printf("[|ppp]"); - return (caplen); - } - - if (eflag) - printf("%02x %02x %d ", p[0], p[1], length); - p += 2; - length -= 2; - hdrlen += 2; - - proto = EXTRACT_16BITS(p); - p += 2; - length -= 2; - hdrlen += 2; - printf("%s: ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto)); - - handle_ppp(proto, p, length); - break; - - case CHDLC_UNICAST: - case CHDLC_BCAST: - return (chdlc_if_print(h, p)); - - default: - if (eflag) - printf("%02x %02x %d ", p[0], p[1], length); - p += 2; - length -= 2; - hdrlen += 2; - - /* - * XXX - NetBSD's "ppp_netbsd_serial_if_print()" treats - * the next two octets as an Ethernet type; does that - * ever happen? - */ - printf("unknown addr %02x; ctrl %02x", p[0], p[1]); - break; - } - - return (hdrlen); -} - -#define PPP_BSDI_HDRLEN 24 - -/* BSD/OS specific PPP printer */ -u_int -ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_) -{ - register int hdrlength; -#ifdef __bsdi__ - register u_int length = h->len; - register u_int caplen = h->caplen; - u_int16_t ptype; - const u_char *q; - int i; - - if (caplen < PPP_BSDI_HDRLEN) { - printf("[|ppp]"); - return (caplen) - } - - hdrlength = 0; - -#if 0 - if (p[0] == PPP_ADDRESS && p[1] == PPP_CONTROL) { - if (eflag) - printf("%02x %02x ", p[0], p[1]); - p += 2; - hdrlength = 2; - } - - if (eflag) - printf("%d ", length); - /* Retrieve the protocol type */ - if (*p & 01) { - /* Compressed protocol field */ - ptype = *p; - if (eflag) - printf("%02x ", ptype); - p++; - hdrlength += 1; - } else { - /* Un-compressed protocol field */ - ptype = ntohs(*(u_int16_t *)p); - if (eflag) - printf("%04x ", ptype); - p += 2; - hdrlength += 2; - } -#else - ptype = 0; /*XXX*/ - if (eflag) - printf("%c ", p[SLC_DIR] ? 'O' : 'I'); - if (p[SLC_LLHL]) { - /* link level header */ - struct ppp_header *ph; - - q = p + SLC_BPFHDRLEN; - ph = (struct ppp_header *)q; - if (ph->phdr_addr == PPP_ADDRESS - && ph->phdr_ctl == PPP_CONTROL) { - if (eflag) - printf("%02x %02x ", q[0], q[1]); - ptype = ntohs(ph->phdr_type); - if (eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) { - printf("%s ", tok2str(ppptype2str, - "proto-#%d", ptype)); - } - } else { - if (eflag) { - printf("LLH=["); - for (i = 0; i < p[SLC_LLHL]; i++) - printf("%02x", q[i]); - printf("] "); - } - } - } - if (eflag) - printf("%d ", length); - if (p[SLC_CHL]) { - q = p + SLC_BPFHDRLEN + p[SLC_LLHL]; - - switch (ptype) { - case PPP_VJC: - ptype = vjc_print(q, ptype); - hdrlength = PPP_BSDI_HDRLEN; - p += hdrlength; - switch (ptype) { - case PPP_IP: - ip_print(p, length); - break; -#ifdef INET6 - case PPP_IPV6: - ip6_print(p, length); - break; -#endif - case PPP_MPLS_UCAST: - case PPP_MPLS_MCAST: - mpls_print(p, length); - break; - } - goto printx; - case PPP_VJNC: - ptype = vjc_print(q, ptype); - hdrlength = PPP_BSDI_HDRLEN; - p += hdrlength; - switch (ptype) { - case PPP_IP: - ip_print(p, length); - break; -#ifdef INET6 - case PPP_IPV6: - ip6_print(p, length); - break; -#endif - case PPP_MPLS_UCAST: - case PPP_MPLS_MCAST: - mpls_print(p, length); - break; - } - goto printx; - default: - if (eflag) { - printf("CH=["); - for (i = 0; i < p[SLC_LLHL]; i++) - printf("%02x", q[i]); - printf("] "); - } - break; - } - } - - hdrlength = PPP_BSDI_HDRLEN; -#endif - - length -= hdrlength; - p += hdrlength; - - switch (ptype) { - case PPP_IP: - ip_print(p, length); - break; -#ifdef INET6 - case PPP_IPV6: - ip6_print(p, length); - break; -#endif - case PPP_MPLS_UCAST: - case PPP_MPLS_MCAST: - mpls_print(p, length); - break; - default: - printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", ptype)); - } - -printx: -#else /* __bsdi */ - hdrlength = 0; -#endif /* __bsdi__ */ - return (hdrlength); -} - - -/* - * Local Variables: - * c-style: whitesmith - * c-basic-offset: 8 - * End: - */ |