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Diffstat (limited to 'epan/dissectors/packet-ppp.c')
| -rw-r--r-- | epan/dissectors/packet-ppp.c | 3767 |
1 files changed, 3767 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ppp.c b/epan/dissectors/packet-ppp.c new file mode 100644 index 0000000000..66962677a8 --- /dev/null +++ b/epan/dissectors/packet-ppp.c @@ -0,0 +1,3767 @@ +/* packet-ppp.c + * Routines for ppp packet disassembly + * RFC 1661, RFC 1662 + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * + * This file created and by Mike Hall <mlh@io.com> + * Copyright 1998 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <string.h> +#include <glib.h> +#include "prefs.h" +#include <epan/packet.h> +#include "packet-ppp.h" +#include "ppptypes.h" +#include "etypes.h" +#include "ip_opts.h" +#include <epan/atalk-utils.h> +#include "packet-chdlc.h" +#include "packet-ip.h" +#include "packet-ipx.h" +#include "packet-vines.h" +#include "nlpid.h" +#include "crc16.h" +#include "crc32.h" + +#define ppp_min(a, b) ((a<b) ? a : b) + +static int proto_ppp = -1; +static int hf_ppp_address = -1; +static int hf_ppp_control = -1; +static int hf_ppp_protocol = -1; + +static gint ett_ppp = -1; + +static int proto_lcp = -1; + +static gint ett_lcp = -1; +static gint ett_lcp_options = -1; +static gint ett_lcp_authprot_opt = -1; +static gint ett_lcp_qualprot_opt = -1; +static gint ett_lcp_fcs_alternatives_opt = -1; +static gint ett_lcp_numbered_mode_opt = -1; +static gint ett_lcp_callback_opt = -1; +static gint ett_lcp_multilink_ep_disc_opt = -1; +static gint ett_lcp_internationalization_opt = -1; + +static int proto_ipcp = -1; + +static gint ett_ipcp = -1; +static gint ett_ipcp_options = -1; +static gint ett_ipcp_ipaddrs_opt = -1; +static gint ett_ipcp_compressprot_opt = -1; + +static int proto_osicp = -1; + +static gint ett_osicp = -1; +static gint ett_osicp_options = -1; +static gint ett_osicp_align_npdu_opt = -1; + +static int proto_ccp = -1; + +static gint ett_ccp = -1; +static gint ett_ccp_options = -1; +static gint ett_ccp_stac_opt = -1; +static gint ett_ccp_mppc_opt = -1; +static gint ett_ccp_bsdcomp_opt = -1; +static gint ett_ccp_lzsdcp_opt = -1; +static gint ett_ccp_mvrca_opt = -1; +static gint ett_ccp_deflate_opt = -1; + +static int proto_cbcp = -1; + +static gint ett_cbcp = -1; +static gint ett_cbcp_options = -1; +static gint ett_cbcp_callback_opt = -1; +static gint ett_cbcp_callback_opt_addr = -1; + +static int proto_bacp = -1; + +static gint ett_bacp = -1; +static gint ett_bacp_options = -1; +static gint ett_bacp_favored_peer_opt = -1; + +static int proto_bap = -1; + +static gint ett_bap = -1; +static gint ett_bap_options = -1; +static gint ett_bap_link_type_opt = -1; +static gint ett_bap_phone_delta_opt = -1; +static gint ett_bap_phone_delta_subopt = -1; +static gint ett_bap_call_status_opt = -1; + +static int proto_comp_data = -1; + +static gint ett_comp_data = -1; + +static int proto_pppmuxcp = -1; + +static gint ett_pppmuxcp = -1; +static gint ett_pppmuxcp_options = -1; + +static int proto_pppmux = -1; + +static gint ett_pppmux = -1; +static gint ett_pppmux_subframe = -1; +static gint ett_pppmux_subframe_hdr = -1; +static gint ett_pppmux_subframe_flags = -1; +static gint ett_pppmux_subframe_info = -1; + +static int proto_mp = -1; +static int hf_mp_frag_first = -1; +static int hf_mp_frag_last = -1; +static int hf_mp_sequence_num = -1; + +static int ett_mp = -1; +static int ett_mp_flags = -1; + +static int proto_mplscp = -1; +static gint ett_mplscp = -1; +static gint ett_mplscp_options = -1; + +static int proto_cdpcp = -1; +static gint ett_cdpcp = -1; +static gint ett_cdpcp_options = -1; + +static int proto_pap = -1; /* PAP vars */ +static gint ett_pap = -1; +static gint ett_pap_data = -1; +static gint ett_pap_peer_id = -1; +static gint ett_pap_password = -1; +static gint ett_pap_message = -1; + +static int proto_chap = -1; /* CHAP vars */ +static gint ett_chap = -1; +static gint ett_chap_data = -1; +static gint ett_chap_value = -1; +static gint ett_chap_name = -1; +static gint ett_chap_message = -1; + +static int proto_ipv6cp = -1; /* IPv6CP vars */ + +static gint ett_ipv6cp = -1; +static gint ett_ipv6cp_options = -1; +static gint ett_ipv6cp_if_id_opt = -1; +static gint ett_ipv6cp_compressprot_opt = -1; + +static dissector_table_t ppp_subdissector_table; +static dissector_handle_t chdlc_handle; +static dissector_handle_t data_handle; + +/* options */ +static gint ppp_fcs_decode = 0; /* 0 = No FCS, 1 = 16 bit FCS, 2 = 32 bit FCS */ +#define NO_FCS 0 +#define FCS_16 1 +#define FCS_32 2 + +const enum_val_t fcs_options[] = { + {"none", "None", NO_FCS}, + {"16-bit", "16-Bit", FCS_16}, + {"32-bit", "32-Bit", FCS_32}, + {NULL, NULL, -1} +}; + +gboolean ppp_vj_decomp = TRUE; /* Default to VJ header decompression */ + +/* + * For Default Protocol ID negotiated with PPPMuxCP. We need to + * this ID so that if the first subframe doesn't have protocol + * ID, we can use it + */ + +static guint pppmux_def_prot_id = 0; + +/* PPP definitions */ + +/* + * Used by the GTP dissector as well. + */ +const value_string ppp_vals[] = { + {PPP_PADDING, "Padding Protocol" }, + {PPP_ROHC_SCID, "ROHC small-CID" }, + {PPP_ROHC_LCID, "ROHC large-CID" }, + {PPP_IP, "IP" }, + {PPP_OSI, "OSI" }, + {PPP_DEC4, "DECnet Phase IV" }, + {PPP_AT, "Appletalk" }, + {PPP_IPX, "Netware IPX/SPX"}, + {PPP_VJC_COMP, "VJ compressed TCP"}, + {PPP_VJC_UNCOMP,"VJ uncompressed TCP"}, + {PPP_BPDU, "Bridging PDU"}, + {PPP_ST, "Stream Protocol (ST-II)" }, + {PPP_VINES, "Vines" }, + {PPP_AT_EDDP, "AppleTalk EDDP" }, + {PPP_AT_SB, "AppleTalk SmartBuffered" }, + {PPP_MP, "Multilink"}, + {PPP_NB, "NETBIOS Framing" }, + {PPP_CISCO, "Cisco Systems" }, + {PPP_ASCOM, "Ascom Timeplex" }, + {PPP_LBLB, "Fujitsu Link Backup and Load Balancing" }, + {PPP_RL, "DCA Remote Lan" }, + {PPP_SDTP, "Serial Data Transport Protocol" }, + {PPP_LLC, "SNA over LLC" }, + {PPP_SNA, "SNA" }, + {PPP_IPV6HC, "IPv6 Header Compression " }, + {PPP_KNX, "KNX Bridging Data" }, + {PPP_ENCRYPT, "Encryption" }, + {PPP_ILE, "Individual Link Encryption" }, + {PPP_IPV6, "IPv6" }, + {PPP_MUX, "PPP Multiplexing"}, + {PPP_RTP_FH, "RTP IPHC Full Header" }, + {PPP_RTP_CTCP, "RTP IPHC Compressed TCP" }, + {PPP_RTP_CNTCP, "RTP IPHC Compressed Non TCP" }, + {PPP_RTP_CUDP8, "RTP IPHC Compressed UDP 8" }, + {PPP_RTP_CRTP8, "RTP IPHC Compressed RTP 8" }, + {PPP_STAMPEDE, "Stampede Bridging" }, + {PPP_MPPLUS, "MP+ Protocol" }, + {PPP_NTCITS_IPI,"NTCITS IPI" }, + {PPP_ML_SLCOMP, "single link compression in multilink" }, + {PPP_COMP, "compressed packet" }, + {PPP_STP_HELLO, "802.1d Hello Packet" }, + {PPP_IBM_SR, "IBM Source Routing BPDU" }, + {PPP_DEC_LB, "DEC LANBridge100 Spanning Tree"}, + {PPP_CDP, "Cisco Discovery Protocol" }, + {PPP_NETCS, "Netcs Twin Routing" }, + {PPP_STP, "Scheduled Transfer Protocol" }, + {PPP_EDP, "Extreme Discovery Protocol" }, + {PPP_OSCP, "Optical Supervisory Channel Protocol" }, + {PPP_OSCP2, "Optical Supervisory Channel Protocol" }, + {PPP_LUXCOM, "Luxcom" }, + {PPP_SIGMA, "Sigma Network Systems" }, + {PPP_ACSP, "Apple Client Server Protocol" }, + {PPP_MPLS_UNI, "MPLS Unicast"}, + {PPP_MPLS_MULTI, "MPLS Multicast"}, + {PPP_P12844, "IEEE p1284.4 standard - data packets" }, + {PPP_ETSI, "ETSI TETRA Networks Procotol Type 1" }, + {PPP_MFTP, "Multichannel Flow Treatment Protocol" }, + {PPP_RTP_CTCPND,"RTP IPHC Compressed TCP No Delta" }, + {PPP_RTP_CS, "RTP IPHC Context State" }, + {PPP_RTP_CUDP16,"RTP IPHC Compressed UDP 16" }, + {PPP_RTP_CRDP16,"RTP IPHC Compressed RTP 16" }, + {PPP_CCCP, "Cray Communications Control Protocol" }, + {PPP_CDPD_MNRP, "CDPD Mobile Network Registration Protocol" }, + {PPP_EXPANDAP, "Expand accelarator protocol" }, + {PPP_ODSICP, "ODSICP NCP" }, + {PPP_DOCSIS, "DOCSIS DLL" }, + {PPP_LZS, "Stacker LZS" }, + {PPP_REFTEK, "RefTek Protocol" }, + {PPP_FC, "Fibre Channel" }, + {PPP_EMIT, "EMIT Protocols" }, + {PPP_IPCP, "IP Control Protocol" }, + {PPP_OSICP, "OSI Control Protocol" }, + {PPP_XNSIDPCP, "Xerox NS IDP Control Protocol" }, + {PPP_DECNETCP, "DECnet Phase IV Control Protocol" }, + {PPP_ATCP, "AppleTalk Control Protocol" }, + {PPP_IPXCP, "IPX Control Protocol" }, + {PPP_BRIDGENCP, "Bridging NCP" }, + {PPP_SPCP, "Stream Protocol Control Protocol" }, + {PPP_BVCP, "Banyan Vines Control Protocol" }, + {PPP_MLCP, "Multi-Link Control Protocol" }, + {PPP_NBCP, "NETBIOS Framing Control Protocol" }, + {PPP_CISCOCP, "Cisco Systems Control Protocol" }, + {PPP_ASCOMCP, "Ascom Timeplex" }, + {PPP_LBLBCP, "Fujitsu LBLB Control Protocol" }, + {PPP_RLNCP, "DCA Remote Lan Network Control Protocol" }, + {PPP_SDCP, "Serial Data Control Protocol" }, + {PPP_LLCCP, "SNA over LLC Control Protocol" }, + {PPP_SNACP, "SNA Control Protocol" }, + {PPP_KNXCP, "KNX Bridging Control Protocol" }, + {PPP_ECP, "Encryption Control Protocol" }, + {PPP_ILECP, "Individual Encryption Control Protocol" }, + {PPP_IPV6CP, "IPv6 Control Protocol" }, + {PPP_MUXCP, "PPPMux Control Protocol"}, + {PPP_STAMPEDECP,"Stampede Bridging Control Protocol" }, + {PPP_MPPCP, "MP+ Contorol Protocol" }, + {PPP_IPICP, "NTCITS IPI Control Protocol" }, + {PPP_SLCC, "single link compression in multilink control" }, + {PPP_CCP, "Compression Control Protocol" }, + {PPP_CDPCP, "CDP Control Protocol" }, + {PPP_NETCSCP, "Netcs Twin Routing" }, + {PPP_STPCP, "STP - Control Protocol" }, + {PPP_EDPCP, "EDP Control Protocol" }, + {PPP_ACSPC, "Apple Client Server Protocol Control" }, + {PPP_MPLSCP, "MPLS Control Protocol" }, + {PPP_P12844CP, "IEEE p1284.4 standard - Protocol Control" }, + {PPP_ETSICP, "ETSI TETRA TNP1 Control Protocol" }, + {PPP_MFTPCP, "Multichannel Flow Treatment Protocol" }, + {PPP_LCP, "Link Control Protocol" }, + {PPP_PAP, "Password Authentication Protocol" }, + {PPP_LQR, "Link Quality Report protocol" }, + {PPP_SPAP, "Shiva Password Authentication Protocol" }, + {PPP_CBCP, "Callback Control Protocol" }, + {PPP_BACP, "Bandwidth Allocation Control Protocol" }, + {PPP_BAP, "Bandwidth Allocation Protocol" }, + {PPP_CONTCP, "Container Control Protocol" }, + {PPP_CHAP, "Challenge Handshake Authentication Protocol" }, + {PPP_RSAAP, "RSA Authentication Protocol" }, + {PPP_EAP, "Extensible Authentication Protocol" }, + {PPP_SIEP, "Mitsubishi Security Information Exchange Protocol"}, + {PPP_SBAP, "Stampede Bridging Authorization Protocol" }, + {PPP_PRPAP, "Proprietary Authentication Protocol" }, + {PPP_PRPAP2, "Proprietary Authentication Protocol" }, + {PPP_PRPNIAP, "Proprietary Node ID Authentication Protocol" }, + {0, NULL } +}; + +/* CP (LCP, IPCP, etc.) codes. + * from pppd fsm.h + */ +#define CONFREQ 1 /* Configuration Request */ +#define CONFACK 2 /* Configuration Ack */ +#define CONFNAK 3 /* Configuration Nak */ +#define CONFREJ 4 /* Configuration Reject */ +#define TERMREQ 5 /* Termination Request */ +#define TERMACK 6 /* Termination Ack */ +#define CODEREJ 7 /* Code Reject */ + +static const value_string cp_vals[] = { + {CONFREQ, "Configuration Request" }, + {CONFACK, "Configuration Ack" }, + {CONFNAK, "Configuration Nak" }, + {CONFREJ, "Configuration Reject" }, + {TERMREQ, "Termination Request" }, + {TERMACK, "Termination Ack" }, + {CODEREJ, "Code Reject" }, + {0, NULL } }; + +/* + * LCP-specific packet types. + */ +#define PROTREJ 8 /* Protocol Reject */ +#define ECHOREQ 9 /* Echo Request */ +#define ECHOREP 10 /* Echo Reply */ +#define DISCREQ 11 /* Discard Request */ +#define IDENT 12 /* Identification */ +#define TIMEREMAIN 13 /* Time remaining */ + +/* + * CCP-specific packet types. + */ +#define RESETREQ 14 /* Reset Request */ +#define RESETACK 15 /* Reset Ack */ + +/* + * CBCP-specific packet types. + */ +#define CBREQ 1 /* Callback Request */ +#define CBRES 2 /* Callback Response */ +#define CBACK 3 /* Callback Ack */ + +#define CBCP_OPT 6 /* Use callback control protocol */ + +/* + * BAP-specific packet types. + */ +#define BAP_CREQ 1 /* Call Request */ +#define BAP_CRES 2 /* Call Response */ +#define BAP_CBREQ 3 /* Callback Request */ +#define BAP_CBRES 4 /* Callback Response */ +#define BAP_LDQREQ 5 /* Link Drop Query Request */ +#define BAP_LDQRES 6 /* Link Drop Query Response */ +#define BAP_CSI 7 /* Call Status Indication */ +#define BAP_CSRES 8 /* Call Status Response */ + +static const value_string lcp_vals[] = { + {CONFREQ, "Configuration Request" }, + {CONFACK, "Configuration Ack" }, + {CONFNAK, "Configuration Nak" }, + {CONFREJ, "Configuration Reject" }, + {TERMREQ, "Termination Request" }, + {TERMACK, "Termination Ack" }, + {CODEREJ, "Code Reject" }, + {PROTREJ, "Protocol Reject" }, + {ECHOREQ, "Echo Request" }, + {ECHOREP, "Echo Reply" }, + {DISCREQ, "Discard Request" }, + {IDENT, "Identification" }, + {TIMEREMAIN, "Time Remaining" }, + {0, NULL } +}; + +static const value_string ccp_vals[] = { + {CONFREQ, "Configuration Request" }, + {CONFACK, "Configuration Ack" }, + {CONFNAK, "Configuration Nak" }, + {CONFREJ, "Configuration Reject" }, + {TERMREQ, "Termination Request" }, + {TERMACK, "Termination Ack" }, + {CODEREJ, "Code Reject" }, + {RESETREQ, "Reset Request" }, + {RESETACK, "Reset Ack" }, + {0, NULL } +}; + +static const value_string cbcp_vals[] = { + {CBREQ, "Callback Request" }, + {CBRES, "Callback Response" }, + {CBACK, "Callback Ack" }, + {0, NULL } +}; + +static const value_string bap_vals[] = { + {BAP_CREQ, "Call Request" }, + {BAP_CRES, "Call Response" }, + {BAP_CBREQ, "Callback Request" }, + {BAP_CBRES, "Callback Response" }, + {BAP_LDQREQ, "Link Drop Query Request" }, + {BAP_LDQRES, "Link Drop Query Response" }, + {BAP_CSI, "Call Status Indication" }, + {BAP_CSRES, "Call Status Response" }, + {0, NULL } +}; + +#define BAP_RESP_CODE_REQACK 0x00 +#define BAP_RESP_CODE_REQNAK 0x01 +#define BAP_RESP_CODE_REQREJ 0x02 +#define BAP_RESP_CODE_REQFULLNAK 0x03 +static const value_string bap_resp_code_vals[] = { + {BAP_RESP_CODE_REQACK, "Request Ack" }, + {BAP_RESP_CODE_REQNAK, "Request Nak" }, + {BAP_RESP_CODE_REQREJ, "Request Rej" }, + {BAP_RESP_CODE_REQFULLNAK, "Request Full Nak" }, + {0, NULL } +}; + +#define BAP_LINK_TYPE_ISDN 0 /* ISDN */ +#define BAP_LINK_TYPE_X25 1 /* X.25 */ +#define BAP_LINK_TYPE_ANALOG 2 /* Analog */ +#define BAP_LINK_TYPE_SD 3 /* Switched Digital (non-ISDN) */ +#define BAP_LINK_TYPE_ISDNOV 4 /* ISDN data over voice */ +#define BAP_LINK_TYPE_RESV5 5 /* Reserved */ +#define BAP_LINK_TYPE_RESV6 6 /* Reserved */ +#define BAP_LINK_TYPE_RESV7 7 /* Reserved */ +static const value_string bap_link_type_vals[] = { + {BAP_LINK_TYPE_ISDN, "ISDN" }, + {BAP_LINK_TYPE_X25, "X.25" }, + {BAP_LINK_TYPE_ANALOG, "Analog" }, + {BAP_LINK_TYPE_SD, "Switched Digital (non-ISDN)" }, + {BAP_LINK_TYPE_ISDNOV, "ISDN data over voice" }, + {BAP_LINK_TYPE_RESV5, "Reserved" }, + {BAP_LINK_TYPE_RESV6, "Reserved" }, + {BAP_LINK_TYPE_RESV7, "Reserved" }, + {0, NULL } +}; + +#define BAP_PHONE_DELTA_SUBOPT_UNIQ_DIGIT 1 /* Unique Digit */ +#define BAP_PHONE_DELTA_SUBOPT_SUBSC_NUM 2 /* Subscriber Number */ +#define BAP_PHONE_DELTA_SUBOPT_PHONENUM_SUBADDR 3 /* Phone Number Sub Address */ +static const value_string bap_phone_delta_subopt_vals[] = { + {BAP_PHONE_DELTA_SUBOPT_UNIQ_DIGIT, "Unique Digit" }, + {BAP_PHONE_DELTA_SUBOPT_SUBSC_NUM, "Subscriber Number" }, + {BAP_PHONE_DELTA_SUBOPT_PHONENUM_SUBADDR, "Phone Number Sub Address" }, + {0, NULL } +}; + +/* + * Cause codes for Cause. + * + * The following code table is taken from packet-q931.c but is slightly + * adapted to BAP protocol. + */ +static const value_string q931_cause_code_vals[] = { + { 0x00, "Call successful" }, + { 0x01, "Unallocated (unassigned) number" }, + { 0x02, "No route to specified transit network" }, + { 0x03, "No route to destination" }, + { 0x04, "Send special information tone" }, + { 0x05, "Misdialled trunk prefix" }, + { 0x06, "Channel unacceptable" }, + { 0x07, "Call awarded and being delivered in an established channel" }, + { 0x08, "Prefix 0 dialed but not allowed" }, + { 0x09, "Prefix 1 dialed but not allowed" }, + { 0x0A, "Prefix 1 dialed but not required" }, + { 0x0B, "More digits received than allowed, call is proceeding" }, + { 0x10, "Normal call clearing" }, + { 0x11, "User busy" }, + { 0x12, "No user responding" }, + { 0x13, "No answer from user (user alerted)" }, + { 0x14, "Subscriber absent" }, + { 0x15, "Call rejected" }, + { 0x16, "Number changed" }, + { 0x17, "Reverse charging rejected" }, + { 0x18, "Call suspended" }, + { 0x19, "Call resumed" }, + { 0x1A, "Non-selected user clearing" }, + { 0x1B, "Destination out of order" }, + { 0x1C, "Invalid number format (incomplete number)" }, + { 0x1D, "Facility rejected" }, + { 0x1E, "Response to STATUS ENQUIRY" }, + { 0x1F, "Normal unspecified" }, + { 0x21, "Circuit out of order" }, + { 0x22, "No circuit/channel available" }, + { 0x23, "Destination unattainable" }, + { 0x25, "Degraded service" }, + { 0x26, "Network out of order" }, + { 0x27, "Transit delay range cannot be achieved" }, + { 0x28, "Throughput range cannot be achieved" }, + { 0x29, "Temporary failure" }, + { 0x2A, "Switching equipment congestion" }, + { 0x2B, "Access information discarded" }, + { 0x2C, "Requested circuit/channel not available" }, + { 0x2D, "Pre-empted" }, + { 0x2E, "Precedence call blocked" }, + { 0x2F, "Resources unavailable, unspecified" }, + { 0x31, "Quality of service unavailable" }, + { 0x32, "Requested facility not subscribed" }, + { 0x33, "Reverse charging not allowed" }, + { 0x34, "Outgoing calls barred" }, + { 0x35, "Outgoing calls barred within CUG" }, + { 0x36, "Incoming calls barred" }, + { 0x37, "Incoming calls barred within CUG" }, + { 0x38, "Call waiting not subscribed" }, + { 0x39, "Bearer capability not authorized" }, + { 0x3A, "Bearer capability not presently available" }, + { 0x3E, "Inconsistency in designated outgoing access information and subscriber class" }, + { 0x3F, "Service or option not available, unspecified" }, + { 0x41, "Bearer capability not implemented" }, + { 0x42, "Channel type not implemented" }, + { 0x43, "Transit network selection not implemented" }, + { 0x44, "Message not implemented" }, + { 0x45, "Requested facility not implemented" }, + { 0x46, "Only restricted digital information bearer capability is available" }, + { 0x4F, "Service or option not implemented, unspecified" }, + { 0x51, "Invalid call reference value" }, + { 0x52, "Identified channel does not exist" }, + { 0x53, "Call identity does not exist for suspended call" }, + { 0x54, "Call identity in use" }, + { 0x55, "No call suspended" }, + { 0x56, "Call having the requested call identity has been cleared" }, + { 0x57, "Called user not member of CUG" }, + { 0x58, "Incompatible destination" }, + { 0x59, "Non-existent abbreviated address entry" }, + { 0x5A, "Destination address missing, and direct call not subscribed" }, + { 0x5B, "Invalid transit network selection (national use)" }, + { 0x5C, "Invalid facility parameter" }, + { 0x5D, "Mandatory information element is missing" }, + { 0x5F, "Invalid message, unspecified" }, + { 0x60, "Mandatory information element is missing" }, + { 0x61, "Message type non-existent or not implemented" }, + { 0x62, "Message not compatible with call state or message type non-existent or not implemented" }, + { 0x63, "Information element nonexistant or not implemented" }, + { 0x64, "Invalid information element contents" }, + { 0x65, "Message not compatible with call state" }, + { 0x66, "Recovery on timer expiry" }, + { 0x67, "Parameter non-existent or not implemented - passed on" }, + { 0x6E, "Message with unrecognized parameter discarded" }, + { 0x6F, "Protocol error, unspecified" }, + { 0x7F, "Internetworking, unspecified" }, + { 0xFF, "Non-specific failure" }, + { 0, NULL } +}; + +static const value_string bap_call_status_opt_action_vals[] = { + {0, "No retry" }, + {1, "Retry" }, + {0, NULL } +}; + +#define STAC_CM_NONE 0 +#define STAC_CM_LCB 1 +#define STAC_CM_CRC 2 +#define STAC_CM_SN 3 +#define STAC_CM_EXTMODE 4 +static const value_string stac_checkmode_vals[] = { + {STAC_CM_NONE, "None" }, + {STAC_CM_LCB, "LCB" }, + {STAC_CM_CRC, "CRC" }, + {STAC_CM_SN, "Sequence Number" }, + {STAC_CM_EXTMODE, "Extended Mode" }, + {0, NULL } +}; + +#define LZSDCP_CM_NONE 0 +#define LZSDCP_CM_LCB 1 +#define LZSDCP_CM_SN 2 +#define LZSDCP_CM_SN_LCB 3 +static const value_string lzsdcp_checkmode_vals[] = { + {LZSDCP_CM_NONE, "None" }, + {LZSDCP_CM_LCB, "LCB" }, + {LZSDCP_CM_SN, "Sequence Number" }, + {LZSDCP_CM_SN_LCB, "Sequence Number + LCB" }, + {0, NULL } +}; + +#define LZSDCP_PM_NONE 0 +#define LZSDCP_PM_PROC_UNCOMP 1 +static const value_string lzsdcp_processmode_vals[] = { + {LZSDCP_PM_NONE, "None" }, + {LZSDCP_PM_PROC_UNCOMP, "Process-Uncompressed" }, + {0, NULL } +}; + +/* + * Options. (LCP) + */ +#define CI_MRU 1 /* Maximum Receive Unit */ +#define CI_ASYNCMAP 2 /* Async Control Character Map */ +#define CI_AUTHTYPE 3 /* Authentication Type */ +#define CI_QUALITY 4 /* Quality Protocol */ +#define CI_MAGICNUMBER 5 /* Magic Number */ +#define CI_PCOMPRESSION 7 /* Protocol Field Compression */ +#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */ +#define CI_FCS_ALTERNATIVES 9 /* FCS Alternatives (RFC 1570) */ +#define CI_SELF_DESCRIBING_PAD 10 /* Self-Describing Pad (RFC 1570) */ +#define CI_NUMBERED_MODE 11 /* Numbered Mode (RFC 1663) */ +#define CI_CALLBACK 13 /* Callback (RFC 1570) */ +#define CI_COMPOUND_FRAMES 15 /* Compound frames (RFC 1570) */ +#define CI_MULTILINK_MRRU 17 /* Multilink MRRU (RFC 1717) */ +#define CI_MULTILINK_SSNH 18 /* Multilink Short Sequence Number + Header (RFC 1717) */ +#define CI_MULTILINK_EP_DISC 19 /* Multilink Endpoint Discriminator + (RFC 1717) */ +#define CI_DCE_IDENTIFIER 21 /* DCE Identifier */ +#define CI_MULTILINK_PLUS_PROC 22 /* Multilink Plus Procedure */ +#define CI_LINK_DISC_FOR_BACP 23 /* Link Discriminator for BACP + (RFC 2125) */ +#define CI_LCP_AUTHENTICATION 24 /* LCP Authentication Option */ +#define CI_COBS 25 /* Consistent Overhead Byte + Stuffing */ +#define CI_PREFIX_ELISION 26 /* Prefix elision */ +#define CI_MULTILINK_HDR_FMT 27 /* Multilink header format */ +#define CI_INTERNATIONALIZATION 28 /* Internationalization (RFC 2484) */ +#define CI_SDL_ON_SONET_SDH 29 /* Simple Data Link on SONET/SDH */ + +static void dissect_lcp_mru_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_lcp_async_map_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_lcp_protocol_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_lcp_authprot_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_lcp_magicnumber_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_fcs_alternatives_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_numbered_mode_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_self_describing_pad_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_lcp_multilink_mrru_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_multilink_ep_disc_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_bap_link_discriminator_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_lcp_internationalization_opt(const ip_tcp_opt *optp, + tvbuff_t *tvb, int offset, guint length, + packet_info *pinfo, proto_tree *tree); +static void dissect_mp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static const ip_tcp_opt lcp_opts[] = { + { + CI_MRU, + "Maximum Receive Unit", + NULL, + FIXED_LENGTH, + 4, + dissect_lcp_mru_opt + }, + { + CI_ASYNCMAP, + "Async Control Character Map", + NULL, + FIXED_LENGTH, + 6, + dissect_lcp_async_map_opt + }, + { + CI_AUTHTYPE, + "Authentication protocol", + &ett_lcp_authprot_opt, + VARIABLE_LENGTH, + 4, + dissect_lcp_authprot_opt + }, + { + CI_QUALITY, + "Quality protocol", + &ett_lcp_qualprot_opt, + VARIABLE_LENGTH, + 4, + dissect_lcp_protocol_opt + }, + { + CI_MAGICNUMBER, + "Magic number", + NULL, + FIXED_LENGTH, + 6, + dissect_lcp_magicnumber_opt + }, + { + CI_PCOMPRESSION, + "Protocol field compression", + NULL, + FIXED_LENGTH, + 2, + NULL + }, + { + CI_ACCOMPRESSION, + "Address/control field compression", + NULL, + FIXED_LENGTH, + 2, + NULL + }, + { + CI_FCS_ALTERNATIVES, + "FCS alternatives", + &ett_lcp_fcs_alternatives_opt, + FIXED_LENGTH, + 3, + dissect_lcp_fcs_alternatives_opt + }, + { + CI_SELF_DESCRIBING_PAD, + "Maximum octets of self-describing padding", + NULL, + FIXED_LENGTH, + 3, + dissect_lcp_self_describing_pad_opt + }, + { + CI_NUMBERED_MODE, + "Numbered mode", + &ett_lcp_numbered_mode_opt, + VARIABLE_LENGTH, + 4, + dissect_lcp_numbered_mode_opt + }, + { + CI_CALLBACK, + "Callback", + &ett_lcp_callback_opt, + VARIABLE_LENGTH, + 3, + dissect_lcp_callback_opt, + }, + { + CI_COMPOUND_FRAMES, + "Compound frames", + NULL, + FIXED_LENGTH, + 2, + NULL + }, + { + CI_MULTILINK_MRRU, + "Multilink MRRU", + NULL, + FIXED_LENGTH, + 4, + dissect_lcp_multilink_mrru_opt + }, + { + CI_MULTILINK_SSNH, + "Use short sequence number headers", + NULL, + FIXED_LENGTH, + 2, + NULL + }, + { + CI_MULTILINK_EP_DISC, + "Multilink endpoint discriminator", + &ett_lcp_multilink_ep_disc_opt, + VARIABLE_LENGTH, + 3, + dissect_lcp_multilink_ep_disc_opt, + }, + { + CI_DCE_IDENTIFIER, + "DCE identifier", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_MULTILINK_PLUS_PROC, + "Multilink Plus Procedure", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_LINK_DISC_FOR_BACP, + "Link discriminator for BAP", + NULL, + FIXED_LENGTH, + 4, + dissect_lcp_bap_link_discriminator_opt + }, + { + CI_LCP_AUTHENTICATION, + "LCP authentication", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_COBS, + "Consistent Overhead Byte Stuffing", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_PREFIX_ELISION, + "Prefix elision", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_MULTILINK_HDR_FMT, + "Multilink header format", + NULL, + VARIABLE_LENGTH, + 2, + NULL + }, + { + CI_INTERNATIONALIZATION, + "Internationalization", + &ett_lcp_internationalization_opt, + VARIABLE_LENGTH, + 7, + dissect_lcp_internationalization_opt + }, + { + CI_SDL_ON_SONET_SDH, + "Simple data link on SONET/SDH", + NULL, + VARIABLE_LENGTH, + 2, + NULL + } +}; + +#define N_LCP_OPTS (sizeof lcp_opts / sizeof lcp_opts[0]) + +/* + * CHAP Algorithms + */ +#define CHAP_ALG_MD5 0x05 /* CHAP with MD5 */ +#define CHAP_ALG_MSV1 0x80 /* MS-CHAPv1 */ +#define CHAP_ALG_MSV2 0x81 /* MS-CHAPv2 */ + +static const value_string chap_alg_vals[] = { + {CHAP_ALG_MD5, "CHAP with MD5" }, + {CHAP_ALG_MSV1, "MS-CHAP" }, + {CHAP_ALG_MSV2, "MS-CHAP-2" }, + {0, NULL } +}; + + +/* + * Options. (IPCP) + */ +#define CI_ADDRS 1 /* IP Addresses (deprecated) (RFC 1172) */ +#define CI_COMPRESSTYPE 2 /* Compression Type (RFC 1332) */ +#define CI_ADDR 3 /* IP Address (RFC 1332) */ +#define CI_MOBILE_IPv4 4 /* Mobile IPv4 (RFC 2290) */ +#define CI_MS_DNS1 129 /* Primary DNS value (RFC 1877) */ +#define CI_MS_WINS1 130 /* Primary WINS value (RFC 1877) */ +#define CI_MS_DNS2 131 /* Secondary DNS value (RFC 1877) */ +#define CI_MS_WINS2 132 /* Secondary WINS value (RFC 1877) */ + +static void dissect_ipcp_addrs_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); +static void dissect_ipcp_addr_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt ipcp_opts[] = { + { + CI_ADDRS, + "IP addresses (deprecated)", + &ett_ipcp_ipaddrs_opt, + FIXED_LENGTH, + 10, + dissect_ipcp_addrs_opt + }, + { + CI_COMPRESSTYPE, + "IP compression protocol", + &ett_ipcp_compressprot_opt, + VARIABLE_LENGTH, + 4, + dissect_lcp_protocol_opt + }, + { + CI_ADDR, + "IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + }, + { + CI_MOBILE_IPv4, + "Mobile node's home IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + }, + { + CI_MS_DNS1, + "Primary DNS server IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + }, + { + CI_MS_WINS1, + "Primary WINS server IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + }, + { + CI_MS_DNS2, + "Secondary DNS server IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + }, + { + CI_MS_WINS2, + "Secondary WINS server IP address", + NULL, + FIXED_LENGTH, + 6, + dissect_ipcp_addr_opt + } +}; + +#define N_IPCP_OPTS (sizeof ipcp_opts / sizeof ipcp_opts[0]) + +/* + * Options. (OSICP) + */ +#define CI_OSICP_ALIGN_NPDU 1 /* Alignment of the OSI NPDU (RFC 1377) */ + +static void dissect_osicp_align_npdu_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt osicp_opts[] = { + { + CI_OSICP_ALIGN_NPDU, + "Align-NPDU", + &ett_osicp_align_npdu_opt, + FIXED_LENGTH, + 3, + dissect_osicp_align_npdu_opt + } +}; + +#define N_OSICP_OPTS (sizeof osicp_opts / sizeof osicp_opts[0]) + +/* + * Options. (CCP) + */ +#define CI_CCP_OUI 0 /* OUI (RFC1962) */ +#define CI_CCP_PREDICT1 1 /* Predictor type 1 (RFC1962) */ +#define CI_CCP_PREDICT2 2 /* Predictor type 2 (RFC1962) */ +#define CI_CCP_PUDDLE 3 /* Puddle Jumper (RFC1962) */ +#define CI_CCP_HPPPC 16 /* Hewlett-Packard PPC (RFC1962) */ +#define CI_CCP_STAC 17 /* stac Electronics LZS (RFC1974) */ +#define CI_CCP_MPPC 18 /* Microsoft PPC (RFC2218/3078) */ +#define CI_CCP_GFZA 19 /* Gandalf FZA (RFC1962) */ +#define CI_CCP_V42BIS 20 /* V.42bis compression */ +#define CI_CCP_BSDLZW 21 /* BSD LZW Compress (RFC1977) */ +#define CI_CCP_LZSDCP 23 /* LZS-DCP (RFC1967) */ +#define CI_CCP_MVRCA 24 /* MVRCA (Magnalink) (RFC1975) */ +#define CI_CCP_DEFLATE 26 /* Deflate (RFC1979) */ +#define CI_CCP_RESERVED 255 /* Reserved (RFC1962) */ + +/* + * Microsoft Point-To-Point Compression (MPPC) and Encryption (MPPE) + * supported bits. + */ +#define MPPC_SUPPORTED_BITS_C 0x00000001 /* MPPC negotiation */ +#define MPPE_SUPPORTED_BITS_D 0x00000010 /* Obsolete */ +#define MPPE_SUPPORTED_BITS_L 0x00000020 /* 40-bit encryption */ +#define MPPE_SUPPORTED_BITS_S 0x00000040 /* 128-bit encryption */ +#define MPPE_SUPPORTED_BITS_M 0x00000080 /* 56-bit encryption */ +#define MPPE_SUPPORTED_BITS_H 0x01000000 /* stateless mode */ + +static void dissect_ccp_stac_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_ccp_mppc_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_ccp_bsdcomp_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_ccp_lzsdcp_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_ccp_mvrca_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_ccp_deflate_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt ccp_opts[] = { + { + CI_CCP_STAC, + "Stac Electronics LZS", + &ett_ccp_stac_opt, + VARIABLE_LENGTH, + 5, + /* In RFC 1974, this is a fixed-length field of size 5, + but in Ascend Proprietary STAC compression this field + is 6 octets. Sigh... */ + dissect_ccp_stac_opt + }, + { + CI_CCP_MPPC, + "Microsoft PPC", + &ett_ccp_mppc_opt, + FIXED_LENGTH, + 6, + dissect_ccp_mppc_opt + }, + { + CI_CCP_BSDLZW, + "BSD Compress", + &ett_ccp_bsdcomp_opt, + FIXED_LENGTH, + 3, + dissect_ccp_bsdcomp_opt + }, + { + CI_CCP_LZSDCP, + "LZS-DCP", + &ett_ccp_lzsdcp_opt, + FIXED_LENGTH, + 6, + dissect_ccp_lzsdcp_opt + }, + { + CI_CCP_MVRCA, + "MVRCA (Magnalink)", + &ett_ccp_mvrca_opt, + FIXED_LENGTH, + 4, + dissect_ccp_mvrca_opt + }, + { + CI_CCP_DEFLATE, + "Deflate", + &ett_ccp_deflate_opt, + FIXED_LENGTH, + 4, /* RFC1979 says the length is 3 but it's actually 4. */ + dissect_ccp_deflate_opt + }, +}; + +#define N_CCP_OPTS (sizeof ccp_opts / sizeof ccp_opts[0]) + +/* + * Options. (CBCP) + */ +#define CI_CBCP_NO_CALLBACK 1 /* No callback */ +#define CI_CBCP_CB_USER 2 /* Callback to a user-specified number */ +#define CI_CBCP_CB_PRE 3 /* Callback to a pre-specified or + administrator specified number */ +#define CI_CBCP_CB_ANY 4 /* Callback to any of a list of numbers */ + +static void dissect_cbcp_no_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_cbcp_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt cbcp_opts[] = { + { + CI_CBCP_NO_CALLBACK, + "No callback", + NULL, + FIXED_LENGTH, + 2, + dissect_cbcp_no_callback_opt + }, + { + CI_CBCP_CB_USER, + "Callback to a user-specified number", + &ett_cbcp_callback_opt, + VARIABLE_LENGTH, + 4, + dissect_cbcp_callback_opt + }, + { + CI_CBCP_CB_PRE, + "Callback to a pre-specified or admin-specified number", + &ett_cbcp_callback_opt, + FIXED_LENGTH, + 3, + dissect_cbcp_callback_opt + }, + { + CI_CBCP_CB_ANY, + "Callback to any of a list of numbers", + &ett_cbcp_callback_opt, + VARIABLE_LENGTH, + 4, + dissect_cbcp_callback_opt + } + +}; + +#define N_CBCP_OPTS (sizeof cbcp_opts / sizeof cbcp_opts[0]) + +/* + * Options. (BACP) + */ +#define CI_BACP_FAVORED_PEER 1 /* Favored-Peer */ + +static void dissect_bacp_favored_peer_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt bacp_opts[] = { + { + CI_BACP_FAVORED_PEER, + "Favored-Peer", + &ett_bacp_favored_peer_opt, + FIXED_LENGTH, + 6, + dissect_bacp_favored_peer_opt + } +}; + +#define N_BACP_OPTS (sizeof bacp_opts / sizeof bacp_opts[0]) + +/* + * Options. (BAP) + */ +#define CI_BAP_LINK_TYPE 1 /* Link Type */ +#define CI_BAP_PHONE_DELTA 2 /* Phone-Delta */ +#define CI_BAP_NO_PHONE_NUM_NEEDED 3 /* No Phone Number Needed */ +#define CI_BAP_REASON 4 /* Reason */ +#define CI_BAP_LINK_DISC 5 /* Link Discriminator */ +#define CI_BAP_CALL_STATUS 6 /* Call Status */ + +static void dissect_bap_link_type_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_bap_phone_delta_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_bap_link_disc_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_bap_reason_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static void dissect_bap_call_status_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt bap_opts[] = { + { + CI_BAP_LINK_TYPE, + "Link Type", + &ett_bap_link_type_opt, + FIXED_LENGTH, + 5, + dissect_bap_link_type_opt + }, + { + CI_BAP_PHONE_DELTA, + "Phone Delta", + &ett_bap_phone_delta_opt, + VARIABLE_LENGTH, + 4, + dissect_bap_phone_delta_opt + }, + { + CI_BAP_NO_PHONE_NUM_NEEDED, + "No Phone Number Needed", + NULL, + FIXED_LENGTH, + 2, + NULL + }, + { + CI_BAP_REASON, + "Reason", + NULL, + VARIABLE_LENGTH, + 2, + dissect_bap_reason_opt + }, + { + CI_BAP_LINK_DISC, + "Link Discriminator", + NULL, + FIXED_LENGTH, + 4, + dissect_bap_link_disc_opt + }, + { + CI_BAP_CALL_STATUS, + "Call Status", + &ett_bap_call_status_opt, + FIXED_LENGTH, + 4, + dissect_bap_call_status_opt + } +}; + +#define N_BAP_OPTS (sizeof bap_opts / sizeof bap_opts[0]) + +static void dissect_ppp(tvbuff_t *tvb, packet_info *pinfo, + proto_tree *tree); + +static const value_string pap_vals[] = { + {CONFREQ, "Authenticate-Request" }, + {CONFACK, "Authenticate-Ack" }, + {CONFNAK, "Authenticate-Nak" }, + {0, NULL } }; + +static void dissect_pap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +#define CHAP_CHAL 1 /* CHAP Challenge */ +#define CHAP_RESP 2 /* CHAP Response */ +#define CHAP_SUCC 3 /* CHAP Success */ +#define CHAP_FAIL 4 /* CHAP Failure */ + +static const value_string chap_vals[] = { + {CHAP_CHAL, "Challenge" }, + {CHAP_RESP, "Response" }, + {CHAP_SUCC, "Success" }, + {CHAP_FAIL, "Failure" }, + {0, NULL } }; + +static void dissect_chap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); + +static const value_string pppmuxcp_vals[] = { + {CONFREQ, "Configuration Request" }, + {CONFACK, "Configuration Ack" }, + {0, NULL} +}; + +/* + * PPPMuxCP options + */ + +#define CI_DEFAULT_PID 1 + +static void dissect_pppmuxcp_def_pid_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, proto_tree *tree); + + +static const ip_tcp_opt pppmuxcp_opts[] = { + { + CI_DEFAULT_PID, + "Default Protocol ID", + NULL, + FIXED_LENGTH, + 4, + dissect_pppmuxcp_def_pid_opt + } +}; + +#define N_PPPMUXCP_OPTS (sizeof pppmuxcp_opts / sizeof pppmuxcp_opts[0]) + +/* + * Options. (IPv6CP) + */ +#define CI_IPV6CP_IF_ID 1 /* Interface Identifier (RFC 2472) */ +#define CI_IPV6CP_COMPRESSTYPE 2 /* Compression Type (RFC 2472) */ + +static void dissect_ipv6cp_if_id_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo, + proto_tree *tree); + +static const ip_tcp_opt ipv6cp_opts[] = { + { + CI_IPV6CP_IF_ID, + "Interface Identifier", + &ett_ipv6cp_if_id_opt, + FIXED_LENGTH, + 10, + dissect_ipv6cp_if_id_opt + }, + { + CI_COMPRESSTYPE, + "IPv6 compression protocol", + &ett_ipcp_compressprot_opt, + VARIABLE_LENGTH, + 4, + dissect_lcp_protocol_opt + }, +}; + +#define N_IPV6CP_OPTS (sizeof ipv6cp_opts / sizeof ipv6cp_opts[0]) + +/* +******************************************************************************* +* DETAILS : Calculate a new FCS-16 given the current FCS-16 and the new data. +******************************************************************************* +*/ +static guint16 +fcs16(tvbuff_t * tvbuff) +{ + guint len = tvb_length(tvbuff)-2; + + /* Check for Invalid Length */ + if (len == 0) + return (0x0000); + return crc16_ccitt_tvb(tvbuff, len); +} + +/* +******************************************************************************* +* DETAILS : Calculate a new FCS-32 given the current FCS-32 and the new data. +******************************************************************************* +*/ +static guint32 +fcs32(tvbuff_t * tvbuff) +{ + guint len = tvb_length(tvbuff)-4; + + /* Check for invalid Length */ + if (len == 0) + return (0x00000000); + return crc32_ccitt_tvb(tvbuff, len); +} + +tvbuff_t * +decode_fcs(tvbuff_t *tvb, proto_tree *fh_tree, int fcs_decode, int proto_offset) +{ + tvbuff_t *next_tvb; + gint len, reported_len; + int rx_fcs_offset; + guint32 rx_fcs_exp; + guint32 rx_fcs_got; + + /* + * Remove the FCS, if any, from the packet data. + */ + switch (fcs_decode) { + + case NO_FCS: + next_tvb = tvb_new_subset(tvb, proto_offset, -1, -1); + break; + + case FCS_16: + /* + * Do we have the entire packet, and does it include a 2-byte FCS? + */ + len = tvb_length_remaining(tvb, proto_offset); + reported_len = tvb_reported_length_remaining(tvb, proto_offset); + if (reported_len < 2 || len < 0) { + /* + * The packet is claimed not to even have enough data for a 2-byte FCS, + * or we're already past the end of the captured data. + * Don't slice anything off. + */ + next_tvb = tvb_new_subset(tvb, proto_offset, -1, -1); + } else if (len < reported_len) { + /* + * The packet is claimed to have enough data for a 2-byte FCS, but + * we didn't capture all of the packet. + * Slice off the 2-byte FCS from the reported length, and trim the + * captured length so it's no more than the reported length; that + * will slice off what of the FCS, if any, is in the captured + * length. + */ + reported_len -= 2; + if (len > reported_len) + len = reported_len; + next_tvb = tvb_new_subset(tvb, proto_offset, len, reported_len); + } else { + /* + * We have the entire packet, and it includes a 2-byte FCS. + * Slice it off. + */ + len -= 2; + reported_len -= 2; + next_tvb = tvb_new_subset(tvb, proto_offset, len, reported_len); + + /* + * Compute the FCS and put it into the tree. + */ + rx_fcs_offset = proto_offset + len; + rx_fcs_exp = fcs16(tvb); + rx_fcs_got = tvb_get_letohs(tvb, rx_fcs_offset); + if (rx_fcs_got != rx_fcs_exp) { + proto_tree_add_text(fh_tree, tvb, rx_fcs_offset, 2, + "FCS 16: 0x%04x (incorrect, should be 0x%04x)", + rx_fcs_got, rx_fcs_exp); + } else { + proto_tree_add_text(fh_tree, tvb, rx_fcs_offset, 2, + "FCS 16: 0x%04x (correct)", + rx_fcs_got); + } + } + break; + + case FCS_32: + /* + * Do we have the entire packet, and does it include a 4-byte FCS? + */ + len = tvb_length_remaining(tvb, proto_offset); + reported_len = tvb_reported_length_remaining(tvb, proto_offset); + if (reported_len < 4) { + /* + * The packet is claimed not to even have enough data for a 4-byte FCS. + * Just pass on the tvbuff as is. + */ + next_tvb = tvb_new_subset(tvb, proto_offset, -1, -1); + } else if (len < reported_len) { + /* + * The packet is claimed to have enough data for a 4-byte FCS, but + * we didn't capture all of the packet. + * Slice off the 4-byte FCS from the reported length, and trim the + * captured length so it's no more than the reported length; that + * will slice off what of the FCS, if any, is in the captured + * length. + */ + reported_len -= 4; + if (len > reported_len) + len = reported_len; + next_tvb = tvb_new_subset(tvb, proto_offset, len, reported_len); + } else { + /* + * We have the entire packet, and it includes a 4-byte FCS. + * Slice it off. + */ + len -= 4; + reported_len -= 4; + next_tvb = tvb_new_subset(tvb, proto_offset, len, reported_len); + + /* + * Compute the FCS and put it into the tree. + */ + rx_fcs_offset = proto_offset + len; + rx_fcs_exp = fcs32(tvb); + rx_fcs_got = tvb_get_letohl(tvb, rx_fcs_offset); + if (rx_fcs_got != rx_fcs_exp) { + proto_tree_add_text(fh_tree, tvb, rx_fcs_offset, 4, + "FCS 32: 0x%08x (incorrect, should be 0x%08x)", + rx_fcs_got, rx_fcs_exp); + } else { + proto_tree_add_text(fh_tree, tvb, rx_fcs_offset, 4, + "FCS 32: 0x%08x (correct)", + rx_fcs_got); + } + } + break; + + default: + g_assert_not_reached(); + next_tvb = NULL; + } + + return next_tvb; +} + +void +capture_ppp_hdlc( const guchar *pd, int offset, int len, packet_counts *ld ) { + if (!BYTES_ARE_IN_FRAME(offset, len, 2)) { + ld->other++; + return; + } + if (pd[0] == CHDLC_ADDR_UNICAST || pd[0] == CHDLC_ADDR_MULTICAST) { + capture_chdlc(pd, offset, len, ld); + return; + } + if (!BYTES_ARE_IN_FRAME(offset, len, 4)) { + ld->other++; + return; + } + switch (pntohs(&pd[offset + 2])) { + case PPP_IP: + capture_ip(pd, offset + 4, len, ld); + break; + case PPP_IPX: + capture_ipx(ld); + break; + case PPP_VINES: + capture_vines(ld); + break; + default: + ld->other++; + break; + } +} + +static void +dissect_lcp_mru_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, int offset, + guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: %u", optp->name, + tvb_get_ntohs(tvb, offset + 2)); +} + +static void +dissect_lcp_async_map_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, int offset, + guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + guint32 map; + char *mapstr; + static const char *ctrlchars[32] = { + "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL", + "BS", "HT", "NL", "VT", "NP (FF)", "CR", "SO", "SI", + "DLE", "DC1 (XON)", "DC2", "DC3 (XOFF)", "DC4", "NAK", "SYN", "ETB", + "CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US" + }; + char mapbuf[32*(10+2)+1]; + char *mapp; + int i; + + /* + * XXX - walk through the map and show the characters to map? + * Put them in a subtree of this item, and have the top-level item + * either say "None", "All", or give a list of the characters?) + */ + map = tvb_get_ntohl(tvb, offset + 2); + if (map == 0x00000000) + mapstr = "None"; /* don't map any control characters */ + else if (map == 0xffffffff) + mapstr = "All"; /* map all control characters */ + else { + /* + * Show the names of the control characters being mapped. + */ + mapp = &mapbuf[0]; + for (i = 0; i < 32; i++) { + if (map & (1 << i)) { + if (mapp != &mapbuf[0]) { + strcpy(mapp, ", "); + mapp += 2; + } + strcpy(mapp, ctrlchars[i]); + mapp += strlen(ctrlchars[i]); + } + } + mapstr = mapbuf; + } + proto_tree_add_text(tree, tvb, offset, length, "%s: 0x%08x (%s)", optp->name, + map, mapstr); +} + +static void +dissect_lcp_protocol_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, int offset, + guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + guint16 protocol; + proto_item *tf; + proto_tree *field_tree = NULL; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + protocol = tvb_get_ntohs(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, 2, "%s: %s (0x%02x)", optp->name, + val_to_str(protocol, ppp_vals, "Unknown"), protocol); + offset += 2; + length -= 2; + if (length > 0) + proto_tree_add_text(field_tree, tvb, offset, length, "Data (%d byte%s)", length, + plurality(length, "", "s")); +} + +static void +dissect_lcp_authprot_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, int offset, + guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + guint16 protocol; + guint8 algorithm; + proto_item *tf; + proto_tree *field_tree = NULL; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + protocol = tvb_get_ntohs(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, 2, "%s: %s (0x%02x)", optp->name, + val_to_str(protocol, ppp_vals, "Unknown"), protocol); + offset += 2; + length -= 2; + if (length > 0) { + if (protocol == PPP_CHAP) { + algorithm = tvb_get_guint8(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, length, + "Algorithm: %s (0x%02x)", + val_to_str(algorithm, chap_alg_vals, "Unknown"), + algorithm); + offset++; + } else { + proto_tree_add_text(field_tree, tvb, offset, length, "Data (%d byte%s)", length, + plurality(length, "", "s")); + } + } +} + +static void +dissect_lcp_magicnumber_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: 0x%08x", optp->name, + tvb_get_ntohl(tvb, offset + 2)); +} + +static void +dissect_lcp_fcs_alternatives_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + guint8 alternatives; + + alternatives = tvb_get_guint8(tvb, offset + 2); + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: 0x%02x", + optp->name, alternatives); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + if (alternatives & 0x1) + proto_tree_add_text(field_tree, tvb, offset + 2, 1, "%s", + decode_boolean_bitfield(alternatives, 0x1, 8, "Null FCS", NULL)); + if (alternatives & 0x2) + proto_tree_add_text(field_tree, tvb, offset + 2, 1, "%s", + decode_boolean_bitfield(alternatives, 0x2, 8, "CCITT 16-bit FCS", NULL)); + if (alternatives & 0x4) + proto_tree_add_text(field_tree, tvb, offset + 2, 1, "%s", + decode_boolean_bitfield(alternatives, 0x4, 8, "CCITT 32-bit FCS", NULL)); +} + +static void +dissect_lcp_self_describing_pad_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: %u", optp->name, + tvb_get_guint8(tvb, offset + 2)); +} + +static void +dissect_lcp_numbered_mode_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + proto_tree_add_text(field_tree, tvb, offset, 1, "Window: %u", + tvb_get_guint8(tvb, offset)); + offset += 1; + length -= 1; + if (length > 0) + proto_tree_add_text(field_tree, tvb, offset, length, "Address (%d byte%s)", + length, plurality(length, "", "s")); +} + +static const value_string callback_op_vals[] = { + {0, "Location is determined by user authentication" }, + {1, "Message is dialing string" }, + {2, "Message is location identifier" }, + {3, "Message is E.164" }, + {4, "Message is distinguished name" }, + {5, "unassigned"}, + {6, "Location is determined during CBCP negotiation" }, + {0, NULL } +}; + +static void +dissect_lcp_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, int offset, + guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + guint8 operation; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + operation = tvb_get_guint8(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, 1, "Operation: %s (0x%02x)", + val_to_str(operation, callback_op_vals, "Unknown"), + operation); + offset += 1; + length -= 1; + if (length > 0) + proto_tree_add_text(field_tree, tvb, offset, length, "Message (%d byte%s)", + length, plurality(length, "", "s")); +} + +static void +dissect_lcp_multilink_mrru_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: %u", optp->name, + tvb_get_ntohs(tvb, offset + 2)); +} + +#define CLASS_NULL 0 +#define CLASS_LOCAL 1 +#define CLASS_IP 2 +#define CLASS_IEEE_802_1 3 +#define CLASS_PPP_MAGIC_NUMBER 4 +#define CLASS_PSDN_DIRECTORY_NUMBER 5 + +static const value_string multilink_ep_disc_class_vals[] = { + {CLASS_NULL, "Null" }, + {CLASS_LOCAL, "Locally assigned address" }, + {CLASS_IP, "IP address" }, + {CLASS_IEEE_802_1, "IEEE 802.1 globally assigned MAC address" }, + {CLASS_PPP_MAGIC_NUMBER, "PPP magic-number block" }, + {CLASS_PSDN_DIRECTORY_NUMBER, "Public switched network directory number" }, + {0, NULL } +}; + +static void +dissect_lcp_multilink_ep_disc_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + guint8 ep_disc_class; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + ep_disc_class = tvb_get_guint8(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, 1, "Class: %s (%u)", + val_to_str(ep_disc_class, multilink_ep_disc_class_vals, "Unknown"), + ep_disc_class); + offset += 1; + length -= 1; + if (length > 0) { + switch (ep_disc_class) { + + case CLASS_NULL: + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been empty", + length, plurality(length, "", "s")); + break; + + case CLASS_LOCAL: + if (length > 20) { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been <20", + length, plurality(length, "", "s")); + } else { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s)", + length, plurality(length, "", "s")); + } + break; + + case CLASS_IP: + if (length != 4) { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been 4", + length, plurality(length, "", "s")); + } else { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address: %s", ip_to_str(tvb_get_ptr(tvb, offset, 4))); + } + break; + + case CLASS_IEEE_802_1: + if (length != 6) { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been 6", + length, plurality(length, "", "s")); + } else { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address: %s", ether_to_str(tvb_get_ptr(tvb, offset, 6))); + } + break; + + case CLASS_PPP_MAGIC_NUMBER: + /* XXX - dissect as 32-bit magic numbers */ + if (length > 20) { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been <20", + length, plurality(length, "", "s")); + } else { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s)", + length, plurality(length, "", "s")); + } + break; + + case CLASS_PSDN_DIRECTORY_NUMBER: + if (length > 15) { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s), should have been <20", + length, plurality(length, "", "s")); + } else { + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s)", + length, plurality(length, "", "s")); + } + break; + + default: + proto_tree_add_text(field_tree, tvb, offset, length, + "Address (%d byte%s)", + length, plurality(length, "", "s")); + break; + } + } +} + +static void +dissect_lcp_bap_link_discriminator_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, + "%s: 0x%04x", optp->name, + tvb_get_ntohs(tvb, offset + 2)); +} + +/* Character set numbers from the IANA charset registry. */ +static const value_string charset_num_vals[] = { + {105, "UTF-8" }, + {0, NULL } +}; + +static void +dissect_lcp_internationalization_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + guint32 charset; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + charset = tvb_get_ntohl(tvb, offset); + proto_tree_add_text(field_tree, tvb, offset, 4, "Character set: %s (0x%04x)", + val_to_str(charset, charset_num_vals, "Unknown"), + charset); + offset += 4; + length -= 4; + if (length > 0) { + /* XXX - should be displayed as an ASCII string */ + proto_tree_add_text(field_tree, tvb, offset, length, "Language tag (%d byte%s)", + length, plurality(length, "", "s")); + } +} + +static void +dissect_ipcp_addrs_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree = NULL; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s: %u byte%s", + optp->name, length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + offset += 2; + length -= 2; + proto_tree_add_text(field_tree, tvb, offset, 4, + "Source IP address: %s", + ip_to_str(tvb_get_ptr(tvb, offset, 4))); + offset += 4; + length -= 4; + proto_tree_add_text(field_tree, tvb, offset, 4, + "Destination IP address: %s", + ip_to_str(tvb_get_ptr(tvb, offset, 4))); +} + +static void dissect_ipcp_addr_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: %s", optp->name, + ip_to_str(tvb_get_ptr(tvb, offset + 2, 4))); +} + +static void dissect_osicp_align_npdu_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 alignment; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + alignment = tvb_get_guint8(tvb, offset + 2); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Alignment: %u", alignment); +} + +static void dissect_pppmuxcp_def_pid_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + pppmux_def_prot_id = tvb_get_ntohs(tvb, offset + 2); + proto_tree_add_text(tree, tvb, offset + 2, length - 2, "%s: %s (0x%02x)",optp->name, + val_to_str(pppmux_def_prot_id, ppp_vals, "Unknown"), pppmux_def_prot_id); +} + + +static void +dissect_ccp_stac_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 check_mode; + + if (length == 6) { + proto_tree_add_text(tree, tvb, offset, length, + "%s (Ascend Proprietary version)", optp->name); + /* We don't know how to decode the following 4 octets, since + there's no public document that describe their usage. */ + } else { + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 2, + "History Count: %u", tvb_get_ntohs(tvb, offset + 2)); + check_mode = tvb_get_guint8(tvb, offset + 4); + proto_tree_add_text(field_tree, tvb, offset + 4, 1, + "Check Mode: %s (0x%02X)", + val_to_str(check_mode, stac_checkmode_vals, "Unknown"), + check_mode); + } +} + +static void +dissect_ccp_mppc_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *flags_tree; + guint32 supported_bits; + + supported_bits = tvb_get_ntohl(tvb, offset + 2); + tf = proto_tree_add_text(tree, tvb, offset, length, + "%s: Supported Bits: 0x%08X", optp->name, supported_bits); + flags_tree = proto_item_add_subtree(tf, *optp->subtree_index); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPC_SUPPORTED_BITS_C, 8*4, + "Desire to negotiate MPPC", "NO Desire to negotiate MPPC")); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPE_SUPPORTED_BITS_D, 8*4, + "Obsolete (should NOT be 1)", "Obsolete (should ALWAYS be 0)")); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPE_SUPPORTED_BITS_L, 8*4, + "40-bit encryption ON", "40-bit encryption OFF")); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPE_SUPPORTED_BITS_S, 8*4, + "128-bit encryption ON", "128-bit encryption OFF")); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPE_SUPPORTED_BITS_M, 8*4, + "56-bit encryption ON", "56-bit encryption OFF")); + proto_tree_add_text(flags_tree, tvb, offset + 2, 4, "%s", + decode_boolean_bitfield(supported_bits, MPPE_SUPPORTED_BITS_H, 8*4, + "Stateless mode ON", "Stateless mode OFF")); +} + +static void +dissect_ccp_bsdcomp_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Version: %u", tvb_get_guint8(tvb, offset + 2) >> 5); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Dict: %u bits", + tvb_get_guint8(tvb, offset + 2) & 0x1f); +} + +static void +dissect_ccp_lzsdcp_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 check_mode; + guint8 process_mode; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 2, + "History Count: %u", tvb_get_ntohs(tvb, offset + 2)); + check_mode = tvb_get_guint8(tvb, offset + 4); + proto_tree_add_text(field_tree, tvb, offset + 4, 1, + "Check Mode: %s (0x%02X)", + val_to_str(check_mode, lzsdcp_checkmode_vals, "Unknown"), + check_mode); + process_mode = tvb_get_guint8(tvb, offset + 5); + proto_tree_add_text(field_tree, tvb, offset + 5, 1, + "Process Mode: %s (0x%02X)", + val_to_str(process_mode, lzsdcp_processmode_vals, "Unkown"), + process_mode); +} + +static void +dissect_ccp_mvrca_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Features: %u", tvb_get_guint8(tvb, offset + 2) >> 5); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Packet by Packet flag: %s", + tvb_get_guint8(tvb, offset + 2) & 0x20 ? "true" : "false"); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "History: %u", tvb_get_guint8(tvb, offset + 2) & 0x20); + proto_tree_add_text(field_tree, tvb, offset + 3, 1, + "Number of contexts: %u", tvb_get_guint8(tvb, offset + 3)); +} + +static void +dissect_ccp_deflate_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 method; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Window: %u", hi_nibble(tvb_get_guint8(tvb, offset + 2))); + method = lo_nibble(tvb_get_guint8(tvb, offset + 2)); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Method: %s (0x%02x)", + method == 0x08 ? "zlib compression" : "other", method); + proto_tree_add_text(field_tree, tvb, offset + 3, 1, + "Sequence number check method: %u", + tvb_get_guint8(tvb, offset + 2) & 0x03); +} + +static void +dissect_cbcp_no_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); +} + +static void +dissect_cbcp_callback_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + proto_item *ta; + proto_tree *addr_tree; + guint8 addr_type; + guint addr_len; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Callback delay: %u", tvb_get_guint8(tvb, offset + 2)); + offset += 3; + length -= 3; + + while (length > 0) { + ta = proto_tree_add_text(field_tree, tvb, offset, length, + "Callback Address"); + addr_type = tvb_get_guint8(tvb, offset); + addr_tree = proto_item_add_subtree(tf, ett_cbcp_callback_opt_addr); + proto_tree_add_text(addr_tree, tvb, offset, 1, + "Address Type: %s (%u)", + ((addr_type == 1) ? "PSTN/ISDN" : "Other"), addr_type); + offset++; + length--; + addr_len = tvb_strsize(tvb, offset); + proto_tree_add_text(addr_tree, tvb, offset, addr_len, + "Address: %s", + tvb_format_text(tvb, offset, addr_len - 1)); + offset += (addr_len + 1); + length -= (addr_len + 1); + } +} + +static void +dissect_bacp_favored_peer_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 4, + "Magic number: 0x%08x", tvb_get_ntohl(tvb, offset + 2)); +} + +static void +dissect_bap_link_type_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 link_type; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + proto_tree_add_text(field_tree, tvb, offset + 2, 2, + "Link Speed: %u kbps", tvb_get_ntohs(tvb, offset + 2)); + link_type = tvb_get_guint8(tvb, offset + 4); + proto_tree_add_text(field_tree, tvb, offset + 4, 1, + "Link Type: %s (%u)", val_to_str(link_type, bap_link_type_vals, + "Unknown"), link_type); +} + +static void +dissect_bap_phone_delta_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + proto_item *ti; + proto_tree *suboption_tree; + guint8 subopt_type; + guint8 subopt_len; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + offset += 2; + length -= 2; + + while (length > 0) { + subopt_type = tvb_get_guint8(tvb, offset); + subopt_len = tvb_get_guint8(tvb, offset + 1); + ti = proto_tree_add_text(field_tree, tvb, offset, subopt_len, + "Sub-Option (%d byte%s)", + subopt_len, plurality(subopt_len, "", "s")); + suboption_tree = proto_item_add_subtree(ti, ett_bap_phone_delta_subopt); + + proto_tree_add_text(suboption_tree, tvb, offset, 1, + "Sub-Option Type: %s (%u)", + val_to_str(subopt_type, bap_phone_delta_subopt_vals, "Unknown"), + subopt_type); + + proto_tree_add_text(suboption_tree, tvb, offset + 1, 1, + "Sub-Option Length: %u", subopt_len); + + switch (subopt_type) { + case BAP_PHONE_DELTA_SUBOPT_UNIQ_DIGIT: + proto_tree_add_text(suboption_tree, tvb, offset + 2, 1, "Uniq Digit: %u", + tvb_get_guint8(tvb, offset + 2)); + break; + case BAP_PHONE_DELTA_SUBOPT_SUBSC_NUM: + if (subopt_len > 2) { + proto_tree_add_text(suboption_tree, tvb, offset + 2, subopt_len - 2, + "Subscriber Number: %s", + tvb_format_text(tvb, offset + 2, subopt_len - 2)); + } else { + proto_tree_add_text(suboption_tree, tvb, offset + 1, 1, + "Invalid suboption length: %u", subopt_len); + } + break; + case BAP_PHONE_DELTA_SUBOPT_PHONENUM_SUBADDR: + if (subopt_len > 2) { + proto_tree_add_text(suboption_tree, tvb, offset + 2, subopt_len - 2, + "Phone Number Sub Address: %s", + tvb_format_text(tvb, offset + 2, subopt_len - 2)); + } + break; + default: + proto_tree_add_text(suboption_tree, tvb, offset + 2, subopt_len - 2, + "Unknown"); + break; + } + offset += subopt_len; + length -= subopt_len; + } +} + +static void +dissect_bap_reason_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + if (length > 2) { + proto_tree_add_text(tree, tvb, offset, length, "%s: %s", + optp->name, + tvb_format_text(tvb, offset + 2, length - 2)); + } +} + +static void +dissect_bap_link_disc_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: 0x%04x", + optp->name, tvb_get_ntohs(tvb, offset + 2)); +} + +static void +dissect_bap_call_status_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_item *tf; + proto_tree *field_tree; + guint8 status, action; + + tf = proto_tree_add_text(tree, tvb, offset, length, "%s", optp->name); + field_tree = proto_item_add_subtree(tf, *optp->subtree_index); + + status = tvb_get_guint8(tvb, offset + 2); + proto_tree_add_text(field_tree, tvb, offset + 2, 1, + "Status: %s (0x%02x)", + val_to_str(status, q931_cause_code_vals, "Unknown"), status); + + action = tvb_get_guint8(tvb, offset + 3); + proto_tree_add_text(field_tree, tvb, offset + 3, 1, + "Action: %s (0x%02x)", + val_to_str(action, bap_call_status_opt_action_vals, "Unknown"), action); +} + +static void +dissect_cp( tvbuff_t *tvb, int proto_id, int proto_subtree_index, + const value_string *proto_vals, int options_subtree_index, + const ip_tcp_opt *opts, int nopts, packet_info *pinfo, + proto_tree *tree ) +{ + proto_item *ti; + proto_tree *fh_tree = NULL; + proto_item *tf; + proto_tree *field_tree; + + guint8 code; + guint8 id; + int length, offset; + guint16 protocol; + + code = tvb_get_guint8(tvb, 0); + id = tvb_get_guint8(tvb, 1); + length = tvb_get_ntohs(tvb, 2); + + if(check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, + proto_get_protocol_short_name(find_protocol_by_id(proto_id))); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(code, proto_vals, "Unknown")); + + if(tree) { + ti = proto_tree_add_item(tree, proto_id, tvb, 0, length, FALSE); + fh_tree = proto_item_add_subtree(ti, proto_subtree_index); + proto_tree_add_text(fh_tree, tvb, 0, 1, "Code: %s (0x%02x)", + val_to_str(code, proto_vals, "Unknown"), code); + proto_tree_add_text(fh_tree, tvb, 1, 1, "Identifier: 0x%02x", + id); + proto_tree_add_text(fh_tree, tvb, 2, 2, "Length: %u", + length); + } + offset = 4; + length -= 4; + + switch (code) { + case CONFREQ: + case CONFACK: + case CONFNAK: + case CONFREJ: + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Options: (%d byte%s)", length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, options_subtree_index); + dissect_ip_tcp_options(tvb, offset, length, opts, nopts, -1, + pinfo, field_tree); + } + } + break; + + case ECHOREQ: + case ECHOREP: + case DISCREQ: + case IDENT: + if(tree) { + proto_tree_add_text(fh_tree, tvb, offset, 4, "Magic number: 0x%08x", + tvb_get_ntohl(tvb, offset)); + offset += 4; + length -= 4; + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Message (%d byte%s)", + length, plurality(length, "", "s")); + } + break; + + case TIMEREMAIN: + if(tree) { + proto_tree_add_text(fh_tree, tvb, offset, 4, "Magic number: 0x%08x", + tvb_get_ntohl(tvb, offset)); + offset += 4; + length -= 4; + proto_tree_add_text(fh_tree, tvb, offset, 4, "Seconds remaining: %u", + tvb_get_ntohl(tvb, offset)); + offset += 4; + length -= 4; + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Message (%d byte%s)", + length, plurality(length, "", "s")); + } + break; + + case PROTREJ: + if(tree) { + gboolean save_in_error_pkt; + tvbuff_t *next_tvb; + + protocol = tvb_get_ntohs(tvb, offset); + proto_tree_add_text(fh_tree, tvb, offset, 2, + "Rejected protocol: %s (0x%04x)", + val_to_str(protocol, ppp_vals, "Unknown"), + protocol); + offset += 2; + length -= 2; + if (length > 0) { + proto_tree_add_text(fh_tree, tvb, offset, length, + "Rejected packet (%d byte%s)", + length, plurality(length, "", "s")); + + /* Save the current value of the "we're inside an error packet" + flag, and set that flag; subdissectors may treat packets + that are the payload of error packets differently from + "real" packets. */ + save_in_error_pkt = pinfo->in_error_pkt; + pinfo->in_error_pkt = TRUE; + + /* Decode the rejected packet. */ + next_tvb = tvb_new_subset(tvb, offset, length, length); + if (!dissector_try_port(ppp_subdissector_table, protocol, + next_tvb, pinfo, fh_tree)) { + call_dissector(data_handle, next_tvb, pinfo, fh_tree); + } + + /* Restore the "we're inside an error packet" flag. */ + pinfo->in_error_pkt = save_in_error_pkt; + } + } + break; + + case CODEREJ: + /* decode the rejected LCP packet here. */ + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Rejected packet (%d byte%s)", + length, plurality(length, "", "s")); + break; + + case TERMREQ: + case TERMACK: + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Data (%d byte%s)", + length, plurality(length, "", "s")); + break; + + default: + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Stuff (%d byte%s)", + length, plurality(length, "", "s")); + break; + } +} + +/* Protocol field compression */ +#define PFC_BIT 0x01 + +static void +dissect_ppp_common( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + proto_tree *fh_tree, proto_item *ti ) +{ + guint16 ppp_prot; + int proto_len; + tvbuff_t *next_tvb; + + ppp_prot = tvb_get_guint8(tvb, 0); + if (ppp_prot & PFC_BIT) { + /* Compressed protocol field - just the byte we fetched. */ + proto_len = 1; + } else { + /* Uncompressed protocol field - fetch all of it. */ + ppp_prot = tvb_get_ntohs(tvb, 0); + proto_len = 2; + } + + /* If "ti" is not null, it refers to the top-level "proto_ppp" item + for PPP, and was given a length equal to the length of any + stuff in the header preceding the protocol type, e.g. an HDLC + header; add the length of the protocol type field to it. */ + if (ti != NULL) + proto_item_set_len(ti, proto_item_get_len(ti) + proto_len); + + if (tree) + proto_tree_add_uint(fh_tree, hf_ppp_protocol, tvb, 0, proto_len, ppp_prot); + + next_tvb = tvb_new_subset(tvb, proto_len, -1, -1); + + /* do lookup with the subdissector table */ + if (!dissector_try_port(ppp_subdissector_table, ppp_prot, next_tvb, pinfo, tree)) { + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "0x%04x", ppp_prot); + if (check_col(pinfo->cinfo, COL_INFO)) + col_add_fstr(pinfo->cinfo, COL_INFO, "PPP %s (0x%04x)", + val_to_str(ppp_prot, ppp_vals, "Unknown"), ppp_prot); + call_dissector(data_handle,next_tvb, pinfo, tree); + } +} + +static void +dissect_lcp_options(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_ip_tcp_options(tvb, 0, tvb_reported_length(tvb), lcp_opts, N_LCP_OPTS, + -1, pinfo, tree); +} + +/* + * RFC 1661. + */ +static void +dissect_lcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_lcp, ett_lcp, lcp_vals, ett_lcp_options, + lcp_opts, N_LCP_OPTS, pinfo, tree); +} + +/* + * RFC 1332. + */ +static void +dissect_ipcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_ipcp, ett_ipcp, cp_vals, ett_ipcp_options, + ipcp_opts, N_IPCP_OPTS, pinfo, tree); +} + +/* + * RFC 1377. + */ +static void +dissect_osicp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_osicp, ett_osicp, cp_vals, ett_osicp_options, + osicp_opts, N_OSICP_OPTS, pinfo, tree); +} + +/* + * RFC 1962. + */ +static void +dissect_ccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_ccp, ett_ccp, ccp_vals, ett_ccp_options, + ccp_opts, N_CCP_OPTS, pinfo, tree); +} + +/* + * Callback Control Protocol - see + * + * http://www.linet.gr.jp/~manabe/PPxP/doc/Standards/draft-gidwani-ppp-callback-cp-00.txt + */ +static void +dissect_cbcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_cbcp, ett_cbcp, cbcp_vals, ett_cbcp_options, + cbcp_opts, N_CBCP_OPTS, pinfo, tree); +} + +/* + * RFC 2125 (BACP and BAP). + */ +static void +dissect_bacp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_bacp, ett_bacp, cp_vals, ett_bacp_options, + bacp_opts, N_BACP_OPTS, pinfo, tree); +} + +static void +dissect_bap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *ti; + proto_tree *fh_tree = NULL; + proto_item *tf; + proto_tree *field_tree; + + guint8 type; + guint8 id; + int length, offset; + guint8 resp_code; + + type = tvb_get_guint8(tvb, 0); + id = tvb_get_guint8(tvb, 1); + length = tvb_get_ntohs(tvb, 2); + + if(check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP BAP"); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(type, bap_vals, "Unknown")); + + if(tree) { + ti = proto_tree_add_item(tree, proto_bap, tvb, 0, length, FALSE); + fh_tree = proto_item_add_subtree(ti, ett_bap_options); + proto_tree_add_text(fh_tree, tvb, 0, 1, "Type: %s (0x%02x)", + val_to_str(type, bap_vals, "Unknown"), type); + proto_tree_add_text(fh_tree, tvb, 1, 1, "Identifier: 0x%02x", + id); + proto_tree_add_text(fh_tree, tvb, 2, 2, "Length: %u", + length); + } + offset = 4; + length -= 4; + + if (type == BAP_CRES || type == BAP_CBRES || + type == BAP_LDQRES || type == BAP_CSRES) { + resp_code = tvb_get_guint8(tvb, offset); + proto_tree_add_text(fh_tree, tvb, offset, 1, "Response Code: %s (0x%02x)", + val_to_str(resp_code, bap_resp_code_vals, "Unknown"), resp_code); + offset++; + length--; + } + + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Data (%d byte%s)", length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, ett_bap_options); + dissect_ip_tcp_options(tvb, offset, length, bap_opts, N_BAP_OPTS, -1, + pinfo, field_tree); + } + } +} + +static void +dissect_comp_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *ti; + proto_tree *comp_data_tree; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP Comp"); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_set_str(pinfo->cinfo, COL_INFO, "Compressed data"); + + if (tree) { + ti = proto_tree_add_item(tree, proto_comp_data, tvb, 0, -1, FALSE); + comp_data_tree = proto_item_add_subtree(ti, ett_comp_data); + } +} + +/* + * RFC 3153 (both PPPMuxCP and PPPMux). + */ +static void +dissect_pppmuxcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb,proto_pppmuxcp,ett_pppmuxcp,pppmuxcp_vals, + ett_pppmuxcp_options,pppmuxcp_opts,N_PPPMUXCP_OPTS,pinfo,tree); +} + +#define PPPMUX_FLAGS_MASK 0xc0 +#define PPPMUX_PFF_BIT_SET 0x80 +#define PPPMUX_LXT_BIT_SET 0x40 + +static void +dissect_pppmux(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_tree *mux_tree, *hdr_tree, *sub_tree, *flag_tree; + proto_tree *info_tree; + proto_item *ti = NULL,*sub_ti = NULL; + guint8 flags, byte; + guint16 length; + static guint16 pid; + tvbuff_t *next_tvb; + int offset = 0, length_remaining; + int length_field = 0, pid_field = 0,hdr_length = 0; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo,COL_PROTOCOL, "PPP PPPMux"); + + if (check_col(pinfo->cinfo, COL_INFO)) + col_set_str(pinfo->cinfo, COL_INFO, "PPP Multiplexing"); + + length_remaining = tvb_reported_length(tvb); + + if (tree) { + ti = proto_tree_add_item(tree, proto_pppmux, tvb, 0, -1, FALSE); + mux_tree = proto_item_add_subtree(ti,ett_pppmux); + + while (length_remaining > 0) { + + flags = tvb_get_guint8(tvb,offset) & PPPMUX_FLAGS_MASK; + + if (flags && PPPMUX_LXT_BIT_SET ) { + length = tvb_get_ntohs(tvb,offset) & 0x3fff; + length_field = 2; + } else { + length = tvb_get_guint8(tvb,offset) & 0x3f; + length_field = 1; + } + + if (flags && PPPMUX_PFF_BIT_SET) { + byte = tvb_get_guint8(tvb,offset + length_field); + if (byte && PFC_BIT) { /* Compressed PID field*/ + pid = byte; + pid_field = 1; + } else { /*PID field is 2 bytes*/ + pid = tvb_get_ntohs(tvb,offset + length_field); + pid_field = 2; + } + } else { + if (!pid){ /*No Last PID, hence use the default */ + if (pppmux_def_prot_id) + pid = pppmux_def_prot_id; + } + } + + hdr_length = length_field + pid_field; + + ti = proto_tree_add_text(mux_tree, tvb, offset, length + length_field, + "PPPMux Sub-frame"); + sub_tree = proto_item_add_subtree(ti,ett_pppmux_subframe); + sub_ti = proto_tree_add_text(sub_tree, tvb, offset, + hdr_length,"Header field"); + + hdr_tree = proto_item_add_subtree(sub_ti,ett_pppmux_subframe_hdr); + ti = proto_tree_add_text(hdr_tree, tvb, offset, length_field, "PFF/LXT: 0x%02X", + flags); + + flag_tree = proto_item_add_subtree(ti,ett_pppmux_subframe_flags); + proto_tree_add_text(flag_tree,tvb,offset,length_field,"%s", + decode_boolean_bitfield(flags,0x80,8,"PID Present","PID not present")); + proto_tree_add_text(flag_tree,tvb,offset,length_field,"%s", + decode_boolean_bitfield(flags,0x40,8,"2 bytes ength field ","1 byte length field")); + + ti = proto_tree_add_text(hdr_tree,tvb,offset,length_field,"Sub-frame Length = %u",length); + + if (flags && PPPMUX_PFF_BIT_SET) + proto_tree_add_text(hdr_tree,tvb,offset + length_field,pid_field,"%s: %s(0x%02x)", + "Protocol ID",val_to_str(pid,ppp_vals,"Unknown"), pid); + + offset += hdr_length; + length_remaining -= hdr_length; + length -= pid_field; + + sub_ti = proto_tree_add_text(sub_tree,tvb,offset,length,"Information Field"); + info_tree = proto_item_add_subtree(sub_ti,ett_pppmux_subframe_info); + + next_tvb = tvb_new_subset(tvb,offset,length,-1); + + if (!dissector_try_port(ppp_subdissector_table, pid, next_tvb, pinfo, info_tree)) { + call_dissector(data_handle, next_tvb, pinfo, info_tree); + } + offset += length; + length_remaining -= length; + } /* While length_remaining */ + pid = 0; + } /* if tree */ +} + +/* + * RFC 3032. + */ +static void +dissect_mplscp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_mplscp, ett_mplscp, cp_vals, ett_mplscp_options, + NULL, 0, pinfo, tree); +} + +/* + * Cisco Discovery Protocol Control Protocol. + * XXX - where is this documented? + */ +static void +dissect_cdpcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_cdpcp, ett_cdpcp, cp_vals, ett_cdpcp_options, + NULL, 0, pinfo, tree); +} + +#define MP_FRAG_MASK 0xC0 +#define MP_FRAG(bits) ((bits) & MP_FRAG_MASK) +#define MP_FRAG_FIRST 0x80 +#define MP_FRAG_LAST 0x40 +#define MP_FRAG_RESERVED 0x3f + +static const true_false_string frag_truth = { + "Yes", + "No" +}; + +/* According to RFC 1717, the length the MP header isn't indicated anywhere + in the header itself. It starts out at four bytes and can be + negotiated down to two using LCP. We currently assume that all + headers are four bytes. - gcc + */ +static void +dissect_mp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_tree *mp_tree, *hdr_tree; + proto_item *ti = NULL; + guint8 flags; + gchar *flag_str; + tvbuff_t *next_tvb; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP MP"); + + if (check_col(pinfo->cinfo, COL_INFO)) + col_set_str(pinfo->cinfo, COL_INFO, "PPP Multilink"); + + flags = tvb_get_guint8(tvb, 0); + + if (tree) { + switch (flags) { + case MP_FRAG_FIRST: + flag_str = "First"; + break; + case MP_FRAG_LAST: + flag_str = "Last"; + break; + case MP_FRAG_FIRST|MP_FRAG_LAST: + flag_str = "First, Last"; + break; + default: + flag_str = "Unknown"; + break; + } + ti = proto_tree_add_item(tree, proto_mp, tvb, 0, 4, FALSE); + mp_tree = proto_item_add_subtree(ti, ett_mp); + ti = proto_tree_add_text(mp_tree, tvb, 0, 1, "Fragment: 0x%2X (%s)", + flags, flag_str); + hdr_tree = proto_item_add_subtree(ti, ett_mp_flags); + proto_tree_add_boolean(hdr_tree, hf_mp_frag_first, tvb, 0, 1, flags); + proto_tree_add_boolean(hdr_tree, hf_mp_frag_last, tvb, 0, 1, flags), + proto_tree_add_text(hdr_tree, tvb, 0, 1, "%s", + decode_boolean_bitfield(flags, MP_FRAG_RESERVED, sizeof(flags) * 8, + "reserved", "reserved")); + proto_tree_add_item(mp_tree, hf_mp_sequence_num, tvb, 1, 3, FALSE); + } + + if (tvb_reported_length_remaining(tvb, 4) > 0) { + next_tvb = tvb_new_subset(tvb, 4, -1, -1); + dissect_ppp(next_tvb, pinfo, tree); + } +} + +/* + * Handles PPP without HDLC framing, just a protocol field (RFC 1661). + */ +static void +dissect_ppp( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree ) { + proto_item *ti = NULL; + proto_tree *fh_tree = NULL; + + if(tree) { + ti = proto_tree_add_item(tree, proto_ppp, tvb, 0, -1, FALSE); + fh_tree = proto_item_add_subtree(ti, ett_ppp); + } + + dissect_ppp_common(tvb, pinfo, tree, fh_tree, ti); +} + +/* + * Handles link-layer encapsulations where the frame might be + * a PPP in HDLC-like Framing frame (RFC 1662) or a Cisco HDLC frame. + */ +static void +dissect_ppp_hdlc( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree ) +{ + proto_item *ti = NULL; + proto_tree *fh_tree = NULL; + guint8 byte0; + int proto_offset; + tvbuff_t *next_tvb; + + byte0 = tvb_get_guint8(tvb, 0); + if (byte0 == CHDLC_ADDR_UNICAST || byte0 == CHDLC_ADDR_MULTICAST) { + /* Cisco HDLC encapsulation */ + call_dissector(chdlc_handle, tvb, pinfo, tree); + return; + } + + /* + * XXX - should we have a routine that always dissects PPP, for use + * when we know the packets are PPP, not CHDLC? + */ + + /* PPP HDLC encapsulation */ + if (byte0 == 0xff) + proto_offset = 2; + else { + /* address and control are compressed (NULL) */ + proto_offset = 0; + } + + /* load the top pane info. This should be overwritten by + the next protocol in the stack */ + + if(check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP" ); + + switch (pinfo->p2p_dir) { + + case P2P_DIR_SENT: + if(check_col(pinfo->cinfo, COL_RES_DL_SRC)) + col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DTE"); + if(check_col(pinfo->cinfo, COL_RES_DL_DST)) + col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DCE"); + break; + + case P2P_DIR_RECV: + if(check_col(pinfo->cinfo, COL_RES_DL_SRC)) + col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DCE"); + if(check_col(pinfo->cinfo, COL_RES_DL_DST)) + col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DTE"); + break; + + default: + if(check_col(pinfo->cinfo, COL_RES_DL_SRC)) + col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A"); + if(check_col(pinfo->cinfo, COL_RES_DL_DST)) + col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A"); + break; + } + + if(tree) { + ti = proto_tree_add_item(tree, proto_ppp, tvb, 0, proto_offset, FALSE); + fh_tree = proto_item_add_subtree(ti, ett_ppp); + if (byte0 == 0xff) { + proto_tree_add_item(fh_tree, hf_ppp_address, tvb, 0, 1, FALSE); + proto_tree_add_item(fh_tree, hf_ppp_control, tvb, 1, 1, FALSE); + } + } + + next_tvb = decode_fcs(tvb, fh_tree, ppp_fcs_decode, proto_offset); + + dissect_ppp_common(next_tvb, pinfo, tree, fh_tree, ti); +} + +/* + * Handles PAP just as a protocol field + */ +static void +dissect_pap( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree ) { + proto_item *ti; + proto_tree *fh_tree = NULL; + proto_item *tf; + proto_tree *field_tree; + proto_item *tm; + proto_tree *message_tree; + proto_item *tp; + proto_tree *peer_id_tree; + proto_item *tpw; + proto_tree *passwd_tree; + + guint8 code; + guint8 id, peer_id_length, password_length, msg_length; + int length, offset; + + code = tvb_get_guint8(tvb, 0); + id = tvb_get_guint8(tvb, 1); + length = tvb_get_ntohs(tvb, 2); + + if(check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP PAP"); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(code, pap_vals, "Unknown")); + + if(tree) { + ti = proto_tree_add_item(tree, proto_pap, tvb, 0, length, FALSE); + fh_tree = proto_item_add_subtree(ti, ett_pap); + proto_tree_add_text(fh_tree, tvb, 0, 1, "Code: %s (0x%02x)", + val_to_str(code, pap_vals, "Unknown"), code); + proto_tree_add_text(fh_tree, tvb, 1, 1, "Identifier: 0x%02x", + id); + proto_tree_add_text(fh_tree, tvb, 2, 2, "Length: %u", + length); + } + offset = 4; + length -= 4; + + switch (code) { + case CONFREQ: + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Data (%d byte%s)", length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, ett_pap_data); + peer_id_length = tvb_get_guint8(tvb, offset); + tp = proto_tree_add_text(field_tree, tvb, offset, 1, + "Peer ID length: %d byte%s", peer_id_length, plurality(peer_id_length, "", "s")); + if (--length > 0) { + peer_id_tree = proto_item_add_subtree(tp, ett_pap_peer_id); + proto_tree_add_text(peer_id_tree, tvb, ++offset, ppp_min(peer_id_length, length), + "Peer-ID (%d byte%s)", peer_id_length, plurality(peer_id_length, "", "s")); + offset+=peer_id_length; + length-=peer_id_length; + if (length > 0) { + password_length = tvb_get_guint8(tvb, offset); + if (--length > 0) { + tpw = proto_tree_add_text(field_tree, tvb, offset, 1, + "Password length: %d byte%s", password_length, plurality(password_length, "", "s")); + passwd_tree = proto_item_add_subtree(tpw, ett_pap_password); + proto_tree_add_text(passwd_tree, tvb, ++offset, ppp_min(password_length, length), + "Password (%d byte%s)", password_length, plurality(password_length, "", "s")); + } + } + } + } + } + break; + + case CONFACK: + case CONFNAK: + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Data (%d byte%s)", length, plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, ett_pap_data); + msg_length = tvb_get_guint8(tvb, offset); + tm = proto_tree_add_text(field_tree, tvb, offset, 1, + "Message length: %d byte%s", msg_length, plurality(msg_length, "", "s")); + if (--length > 0) { + message_tree = proto_item_add_subtree(tm, ett_pap_message); + proto_tree_add_text(message_tree, tvb, ++offset, ppp_min(msg_length, length), + "Message (%d byte%s)", msg_length, plurality(msg_length, "", "s")); + } + } + } + break; + default: + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Stuff (%d byte%s)", + length, plurality(length, "", "s")); + break; + } +} + +/* + * Handles CHAP just as a protocol field + */ +static void +dissect_chap( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree ) { + proto_item *ti; + proto_tree *fh_tree = NULL; + proto_item *tf; + proto_tree *field_tree; + proto_item *tv; + proto_tree *value_tree; + + guint8 code, id, value_size; + guint16 length; + int offset; + int name_length; + + code = tvb_get_guint8(tvb, 0); + id = tvb_get_guint8(tvb, 1); + length = tvb_get_ntohs(tvb, 2); + + if(check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP CHAP"); + + if(check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(code, chap_vals, "Unknown")); + + if(tree) { + ti = proto_tree_add_item(tree, proto_chap, tvb, 0, length, FALSE); + fh_tree = proto_item_add_subtree(ti, ett_chap); + proto_tree_add_text(fh_tree, tvb, 0, 1, "Code: %s (0x%02x)", + val_to_str(code, chap_vals, "Unknown"), code); + proto_tree_add_text(fh_tree, tvb, 1, 1, "Identifier: 0x%02x", + id); + proto_tree_add_text(fh_tree, tvb, 2, 2, "Length: %u", + length); + } + offset = 4; + length -= 4; + + switch (code) { + case CHAP_CHAL: + case CHAP_RESP: + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Data (%d byte%s)", length, + plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, ett_chap_data); + value_size = tvb_get_guint8(tvb, offset); + name_length = length - value_size - 1; + tv = proto_tree_add_text(field_tree, tvb, offset, 1, + "Value Size: %d byte%s", + value_size, plurality(value_size, "", "s")); + if (--length > 0) { + value_tree = proto_item_add_subtree(tv, ett_chap_value); + proto_tree_add_text(value_tree, tvb, ++offset, + ppp_min(value_size, length), + "Value (%d byte%s)", + value_size, plurality(value_size, "", "s")); + offset+=value_size; + length-=value_size; + if (length > 0) { + proto_tree_add_text(field_tree, tvb, offset, + ppp_min(name_length, length), + "Name (%d byte%s)", name_length, + plurality(name_length, "", "s")); + } + } + } + } + break; + + case CHAP_SUCC: + case CHAP_FAIL: + if(tree) { + if (length > 0) { + tf = proto_tree_add_text(fh_tree, tvb, offset, length, + "Data (%d byte%s)", length, + plurality(length, "", "s")); + field_tree = proto_item_add_subtree(tf, ett_chap_data); + tv = proto_tree_add_text(field_tree, tvb, offset, length, + "Message: %d byte%s", + length, plurality(length, "", "s")); + } + } + break; + default: + if (length > 0) + proto_tree_add_text(fh_tree, tvb, offset, length, "Stuff (%d byte%s)", + length, plurality(length, "", "s")); + break; + } +} + +/* + * RFC 2472. + */ +static void +dissect_ipv6cp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + dissect_cp(tvb, proto_ipv6cp, ett_ipv6cp, cp_vals, ett_ipv6cp_options, + ipv6cp_opts, N_IPV6CP_OPTS, pinfo, tree); +} + +static void dissect_ipv6cp_if_id_opt(const ip_tcp_opt *optp, tvbuff_t *tvb, + int offset, guint length, packet_info *pinfo _U_, + proto_tree *tree) +{ + proto_tree_add_text(tree, tvb, offset, length, "%s: %02x%02x:%02x%02x:%02x%x:%02x%02x", + optp->name, + tvb_get_guint8(tvb, offset + 2), + tvb_get_guint8(tvb, offset + 3), + tvb_get_guint8(tvb, offset + 4), + tvb_get_guint8(tvb, offset + 5), + tvb_get_guint8(tvb, offset + 6), + tvb_get_guint8(tvb, offset + 7), + tvb_get_guint8(tvb, offset + 8), + tvb_get_guint8(tvb, offset + 9) + ); +} + +void +proto_register_ppp(void) +{ + static hf_register_info hf[] = { + { &hf_ppp_address, + { "Address", "ppp.address", FT_UINT8, BASE_HEX, + NULL, 0x0, "", HFILL }}, + + { &hf_ppp_control, + { "Control", "ppp.control", FT_UINT8, BASE_HEX, + NULL, 0x0, "", HFILL }}, + + { &hf_ppp_protocol, + { "Protocol", "ppp.protocol", FT_UINT16, BASE_HEX, + VALS(ppp_vals), 0x0, "", HFILL }}, + }; + static gint *ett[] = { + &ett_ppp, + }; + + module_t *ppp_module; + + proto_ppp = proto_register_protocol("Point-to-Point Protocol", "PPP", "ppp"); + proto_register_field_array(proto_ppp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + +/* subdissector code */ + ppp_subdissector_table = register_dissector_table("ppp.protocol", + "PPP protocol", FT_UINT16, BASE_HEX); + + register_dissector("ppp_hdlc", dissect_ppp_hdlc, proto_ppp); + register_dissector("ppp_lcp_options", dissect_lcp_options, proto_ppp); + register_dissector("ppp", dissect_ppp, proto_ppp); + + /* Register the preferences for the ppp protocol */ + ppp_module = prefs_register_protocol(proto_ppp, NULL); + + prefs_register_enum_preference(ppp_module, + "fcs_type", + "PPP Frame Checksum Type", + "The type of PPP frame checksum (none, 16-bit, 32-bit)", + &ppp_fcs_decode, + fcs_options, FALSE); + prefs_register_bool_preference(ppp_module, + "decompress_vj", + "Decompress Van Jacobson-compressed frames", + "Whether Van Jacobson-compressed PPP frames should be decompressed", + &ppp_vj_decomp); + prefs_register_uint_preference(ppp_module, + "default_proto_id", + "PPPMuxCP Default PID", + "Default Protocol ID to be used for PPPMuxCP", + 16, &pppmux_def_prot_id); +} + +void +proto_reg_handoff_ppp(void) +{ + dissector_handle_t ppp_hdlc_handle, ppp_handle; + + /* + * Get a handle for the CHDLC dissector. + */ + chdlc_handle = find_dissector("chdlc"); + data_handle = find_dissector("data"); + + ppp_hdlc_handle = find_dissector("ppp_hdlc"); + ppp_handle = find_dissector("ppp"); + dissector_add("wtap_encap", WTAP_ENCAP_PPP, ppp_hdlc_handle); + dissector_add("wtap_encap", WTAP_ENCAP_PPP_WITH_PHDR, ppp_hdlc_handle); + dissector_add("fr.ietf", NLPID_PPP, ppp_handle); + dissector_add("gre.proto", ETHERTYPE_PPP, ppp_hdlc_handle); +} + +void +proto_register_mp(void) +{ + static hf_register_info hf[] = { + { &hf_mp_frag_first, + { "First fragment", "mp.first", FT_BOOLEAN, 8, + TFS(&frag_truth), MP_FRAG_FIRST, "", HFILL }}, + + { &hf_mp_frag_last, + { "Last fragment", "mp.last", FT_BOOLEAN, 8, + TFS(&frag_truth), MP_FRAG_LAST, "", HFILL }}, + + { &hf_mp_sequence_num, + { "Sequence number", "mp.seq", FT_UINT24, BASE_DEC, NULL, 0x0, + "", HFILL }} + }; + static gint *ett[] = { + &ett_mp, + &ett_mp_flags, + }; + + proto_mp = proto_register_protocol("PPP Multilink Protocol", "PPP MP", "mp"); + proto_register_field_array(proto_mp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_mp(void) +{ + dissector_handle_t mp_handle; + + mp_handle = create_dissector_handle(dissect_mp, proto_mp); + dissector_add("ppp.protocol", PPP_MP, mp_handle); +} + +void +proto_register_lcp(void) +{ + static gint *ett[] = { + &ett_lcp, + &ett_lcp_options, + &ett_lcp_authprot_opt, + &ett_lcp_qualprot_opt, + &ett_lcp_fcs_alternatives_opt, + &ett_lcp_numbered_mode_opt, + &ett_lcp_callback_opt, + &ett_lcp_multilink_ep_disc_opt, + &ett_lcp_internationalization_opt, + }; + + proto_lcp = proto_register_protocol("PPP Link Control Protocol", "PPP LCP", + "lcp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_lcp(void) +{ + dissector_handle_t lcp_handle; + + lcp_handle = create_dissector_handle(dissect_lcp, proto_lcp); + dissector_add("ppp.protocol", PPP_LCP, lcp_handle); + + /* + * NDISWAN on Windows translates Ethernet frames from higher-level + * protocols into PPP frames to hand to the PPP driver, and translates + * PPP frames from the PPP driver to hand to the higher-level protocols. + * + * Apparently the PPP driver, on at least some versions of Windows, + * passes frames for internal-to-PPP protocols up through NDISWAN; + * the protocol type field appears to be passed through unchanged + * (unlike what's done with, for example, the protocol type field + * for IP, which is mapped from its PPP value to its Ethernet value). + * + * This means that we may see, on Ethernet captures, frames for + * protocols internal to PPP, so we register PPP_LCP with the + * "ethertype" dissector table as well as the PPP protocol dissector + * table. + */ + dissector_add("ethertype", PPP_LCP, lcp_handle); +} + +void +proto_register_ipcp(void) +{ + static gint *ett[] = { + &ett_ipcp, + &ett_ipcp_options, + &ett_ipcp_ipaddrs_opt, + &ett_ipcp_compressprot_opt, + }; + + proto_ipcp = proto_register_protocol("PPP IP Control Protocol", "PPP IPCP", + "ipcp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_ipcp(void) +{ + dissector_handle_t ipcp_handle; + + ipcp_handle = create_dissector_handle(dissect_ipcp, proto_ipcp); + dissector_add("ppp.protocol", PPP_IPCP, ipcp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_IPCP, ipcp_handle); +} + +void +proto_register_osicp(void) +{ + static gint *ett[] = { + &ett_osicp, + &ett_osicp_options, + &ett_osicp_align_npdu_opt, + }; + + proto_osicp = proto_register_protocol("PPP OSI Control Protocol", "PPP OSICP", + "osicp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_osicp(void) +{ + dissector_handle_t osicp_handle; + + osicp_handle = create_dissector_handle(dissect_osicp, proto_osicp); + dissector_add("ppp.protocol", PPP_OSICP, osicp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_OSICP, osicp_handle); +} + +void +proto_register_ccp(void) +{ + static gint *ett[] = { + &ett_ccp, + &ett_ccp_options, + &ett_ccp_stac_opt, + &ett_ccp_mppc_opt, + &ett_ccp_bsdcomp_opt, + &ett_ccp_lzsdcp_opt, + &ett_ccp_mvrca_opt, + &ett_ccp_deflate_opt, + }; + + proto_ccp = proto_register_protocol("PPP Compression Control Protocol", + "PPP CCP", "ccp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_ccp(void) +{ + dissector_handle_t ccp_handle; + + ccp_handle = create_dissector_handle(dissect_ccp, proto_ccp); + dissector_add("ppp.protocol", PPP_CCP, ccp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_CCP, ccp_handle); +} + +void +proto_register_cbcp(void) +{ + static gint *ett[] = { + &ett_cbcp, + &ett_cbcp_options, + &ett_cbcp_callback_opt, + &ett_cbcp_callback_opt_addr + }; + + proto_cbcp = proto_register_protocol("PPP Callback Control Protocol", + "PPP CBCP", "cbcp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_cbcp(void) +{ + dissector_handle_t cbcp_handle; + + cbcp_handle = create_dissector_handle(dissect_cbcp, proto_cbcp); + dissector_add("ppp.protocol", PPP_CBCP, cbcp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_CBCP, cbcp_handle); +} + +void +proto_register_bacp(void) +{ + static gint *ett[] = { + &ett_bacp, + &ett_bacp_options, + &ett_bacp_favored_peer_opt + }; + + proto_bacp = proto_register_protocol("PPP Bandwidth Allocation Control Protocol", + "PPP BACP", "bacp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_bacp(void) +{ + dissector_handle_t bacp_handle; + + bacp_handle = create_dissector_handle(dissect_bacp, proto_bacp); + dissector_add("ppp.protocol", PPP_BACP, bacp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_BACP, bacp_handle); +} + +void +proto_register_bap(void) +{ + static gint *ett[] = { + &ett_bap, + &ett_bap_options, + &ett_bap_link_type_opt, + &ett_bap_phone_delta_opt, + &ett_bap_phone_delta_subopt, + &ett_bap_call_status_opt + }; + + proto_bap = proto_register_protocol("PPP Bandwidth Allocation Protocol", + "PPP BAP", "bap"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_bap(void) +{ + dissector_handle_t bap_handle; + + bap_handle = create_dissector_handle(dissect_bap, proto_bap); + dissector_add("ppp.protocol", PPP_BAP, bap_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_BAP, bap_handle); +} + +void +proto_register_comp_data(void) +{ + static gint *ett[] = { + &ett_comp_data + }; + + proto_comp_data = proto_register_protocol("PPP Compressed Datagram", + "PPP Comp", "comp_data"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_comp_data(void) +{ + dissector_handle_t comp_data_handle; + + comp_data_handle = create_dissector_handle(dissect_comp_data, + proto_comp_data); + dissector_add("ppp.protocol", PPP_COMP, comp_data_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_COMP, comp_data_handle); +} + +void +proto_register_pap(void) +{ + static gint *ett[] = { + &ett_pap, + &ett_pap_data, + &ett_pap_peer_id, + &ett_pap_password, + &ett_pap_message, + }; + + proto_pap = proto_register_protocol("PPP Password Authentication Protocol", "PPP PAP", + "pap"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_pap(void) +{ + dissector_handle_t pap_handle; + + pap_handle = create_dissector_handle(dissect_pap, proto_pap); + dissector_add("ppp.protocol", PPP_PAP, pap_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_PAP, pap_handle); +} + +void +proto_register_chap(void) +{ + static gint *ett[] = { + &ett_chap, + &ett_chap_data, + &ett_chap_value, + &ett_chap_name, + &ett_chap_message, + }; + + proto_chap = proto_register_protocol("PPP Challenge Handshake Authentication Protocol", "PPP CHAP", + "chap"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_chap(void) +{ + dissector_handle_t chap_handle; + + chap_handle = create_dissector_handle(dissect_chap, proto_chap); + dissector_add("ppp.protocol", PPP_CHAP, chap_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_CHAP, chap_handle); +} + +void +proto_register_pppmuxcp(void) +{ + static gint *ett[] = { + &ett_pppmuxcp, + &ett_pppmuxcp_options, + }; + + proto_pppmuxcp = proto_register_protocol("PPPMux Control Protocol", + "PPP PPPMuxCP", + "pppmuxcp"); + proto_register_subtree_array(ett, array_length(ett)); +} + + +void +proto_reg_handoff_pppmuxcp(void) +{ + dissector_handle_t muxcp_handle; + + muxcp_handle = create_dissector_handle(dissect_pppmuxcp, proto_pppmuxcp); + dissector_add("ppp.protocol", PPP_MUXCP, muxcp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_MUXCP, muxcp_handle); +} + + +void +proto_register_pppmux(void) +{ + static gint *ett[] = { + &ett_pppmux, + &ett_pppmux_subframe, + &ett_pppmux_subframe_hdr, + &ett_pppmux_subframe_flags, + &ett_pppmux_subframe_info, + }; + + proto_pppmux = proto_register_protocol("PPP Multiplexing", + "PPP PPPMux", + "pppmux"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_pppmux(void) +{ + dissector_handle_t pppmux_handle; + + pppmux_handle = create_dissector_handle(dissect_pppmux, proto_pppmux); + dissector_add("ppp.protocol", PPP_MUX, pppmux_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_MUX, pppmux_handle); +} + +void +proto_register_mplscp(void) +{ + static gint *ett[] = { + &ett_mplscp, + &ett_mplscp_options, + }; + + proto_mplscp = proto_register_protocol("PPP MPLS Control Protocol", + "PPP MPLSCP", "mplscp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_mplscp(void) +{ + dissector_handle_t mplscp_handle; + + mplscp_handle = create_dissector_handle(dissect_mplscp, proto_mplscp); + dissector_add("ppp.protocol", PPP_MPLSCP, mplscp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_MPLSCP, mplscp_handle); +} + +void +proto_register_cdpcp(void) +{ + static gint *ett[] = { + &ett_cdpcp, + &ett_cdpcp_options, + }; + + proto_cdpcp = proto_register_protocol("PPP CDP Control Protocol", + "PPP CDPCP", "cdpcp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_cdpcp(void) +{ + dissector_handle_t cdpcp_handle; + + cdpcp_handle = create_dissector_handle(dissect_cdpcp, proto_cdpcp); + dissector_add("ppp.protocol", PPP_CDPCP, cdpcp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_CDPCP, cdpcp_handle); +} + +void +proto_register_ipv6cp(void) +{ + static gint *ett[] = { + &ett_ipv6cp, + &ett_ipv6cp_options, + &ett_ipv6cp_if_id_opt, + &ett_ipv6cp_compressprot_opt, + }; + + proto_ipv6cp = proto_register_protocol("PPP IPv6 Control Protocol", + "PPP IPV6CP", "ipv6cp"); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_ipv6cp(void) +{ + dissector_handle_t ipv6cp_handle; + + ipv6cp_handle = create_dissector_handle(dissect_ipv6cp, proto_ipv6cp); + dissector_add("ppp.protocol", PPP_IPV6CP, ipv6cp_handle); + + /* + * See above comment about NDISWAN for an explanation of why we're + * registering with the "ethertype" dissector table. + */ + dissector_add("ethertype", PPP_IPV6CP, ipv6cp_handle); +} |