/* packet-juniper.c * Routines for Juniper Networks, Inc. packet disassembly * Copyright 2005 Hannes Gredler * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include #include #include #include "packet-ppp.h" #include "packet-juniper.h" #include void proto_register_juniper(void); void proto_reg_handoff_juniper(void); #define JUNIPER_FLAG_PKT_OUT 0x00 /* Outgoing packet */ #define JUNIPER_FLAG_PKT_IN 0x01 /* Incoming packet */ #define JUNIPER_FLAG_NO_L2 0x02 /* L2 header stripped */ #define JUNIPER_FLAG_EXT 0x80 /* extensions present */ #define EXT_TLV_HEADER_SIZE 2 #define JUNIPER_ATM2_PKT_TYPE_MASK 0x70 #define JUNIPER_ATM2_GAP_COUNT_MASK 0x3F #define JUNIPER_PCAP_MAGIC 0x4d4743 #define JUNIPER_PIC_ATM1 1 #define JUNIPER_PIC_ATM2 2 #define JUNIPER_PIC_MLPPP 3 #define JUNIPER_PIC_MLFR 4 #define JUNIPER_HDR_SNAP 0xaaaa03 #define JUNIPER_HDR_NLPID 0xfefe03 #define JUNIPER_HDR_LLC_UI 0x03 #define JUNIPER_HDR_PPP 0xff03 #define ML_PIC_COOKIE_LEN 2 #define LS_PIC_COOKIE_LEN 4 #define AS_PIC_COOKIE_LEN 8 #define GSP_SVC_REQ_APOLLO 0x40 #define GSP_SVC_REQ_LSQ 0x47 #define LSQ_COOKIE_RE 0x2 #define LSQ_COOKIE_DIR 0x1 #define LSQ_L3_PROTO_SHIFT 4 #define LSQ_L3_PROTO_MASK 0xf0 #define LSQ_L3_PROTO_IPV4 (0 << LSQ_L3_PROTO_SHIFT) #define LSQ_L3_PROTO_IPV6 (1 << LSQ_L3_PROTO_SHIFT) #define LSQ_L3_PROTO_MPLS (2 << LSQ_L3_PROTO_SHIFT) #define LSQ_L3_PROTO_ISO (3 << LSQ_L3_PROTO_SHIFT) #define EXT_TLV_IFD_IDX 1 #define EXT_TLV_IFD_NAME 2 #define EXT_TLV_IFD_MEDIATYPE 3 #define EXT_TLV_IFL_IDX 4 #define EXT_TLV_IFL_UNIT 5 #define EXT_TLV_IFL_ENCAPS 6 #define EXT_TLV_TTP_IFD_MEDIATYPE 7 #define EXT_TLV_TTP_IFL_ENCAPS 8 static const value_string ext_tlv_vals[] = { { EXT_TLV_IFD_IDX, "Device Interface Index" }, { EXT_TLV_IFD_NAME, "Device Interface Name" }, { EXT_TLV_IFD_MEDIATYPE, "Device Media Type" }, { EXT_TLV_IFL_IDX, "Logical Interface Index" }, { EXT_TLV_IFL_UNIT, "Logical Unit Number" }, { EXT_TLV_IFL_ENCAPS, "Logical Interface Encapsulation" }, { EXT_TLV_TTP_IFD_MEDIATYPE, "TTP derived Device Media Type" }, { EXT_TLV_TTP_IFL_ENCAPS, "TTP derived Logical Interface Encapsulation" }, { 0, NULL } }; static const value_string juniper_direction_vals[] = { {JUNIPER_FLAG_PKT_OUT, "Out"}, {JUNIPER_FLAG_PKT_IN, "In"}, {0, NULL} }; static const value_string juniper_l2hdr_presence_vals[] = { { 0, "Present"}, { 2, "none"}, {0, NULL} }; #define JUNIPER_IFML_ETHER 1 #define JUNIPER_IFML_FDDI 2 #define JUNIPER_IFML_TOKENRING 3 #define JUNIPER_IFML_PPP 4 #define JUNIPER_IFML_FRAMERELAY 5 #define JUNIPER_IFML_CISCOHDLC 6 #define JUNIPER_IFML_SMDSDXI 7 #define JUNIPER_IFML_ATMPVC 8 #define JUNIPER_IFML_PPP_CCC 9 #define JUNIPER_IFML_FRAMERELAY_CCC 10 #define JUNIPER_IFML_IPIP 11 #define JUNIPER_IFML_GRE 12 #define JUNIPER_IFML_PIM 13 #define JUNIPER_IFML_PIMD 14 #define JUNIPER_IFML_CISCOHDLC_CCC 15 #define JUNIPER_IFML_VLAN_CCC 16 #define JUNIPER_IFML_MLPPP 17 #define JUNIPER_IFML_MLFR 18 #define JUNIPER_IFML_ML 19 #define JUNIPER_IFML_LSI 20 #define JUNIPER_IFML_DFE 21 #define JUNIPER_IFML_ATM_CELLRELAY_CCC 22 #define JUNIPER_IFML_CRYPTO 23 #define JUNIPER_IFML_GGSN 24 #define JUNIPER_IFML_LSI_PPP 25 #define JUNIPER_IFML_LSI_CISCOHDLC 26 #define JUNIPER_IFML_PPP_TCC 27 #define JUNIPER_IFML_FRAMERELAY_TCC 28 #define JUNIPER_IFML_CISCOHDLC_TCC 29 #define JUNIPER_IFML_ETHERNET_CCC 30 #define JUNIPER_IFML_VT 31 #define JUNIPER_IFML_EXTENDED_VLAN_CCC 32 #define JUNIPER_IFML_ETHER_OVER_ATM 33 #define JUNIPER_IFML_MONITOR 34 #define JUNIPER_IFML_ETHERNET_TCC 35 #define JUNIPER_IFML_VLAN_TCC 36 #define JUNIPER_IFML_EXTENDED_VLAN_TCC 37 #define JUNIPER_IFML_CONTROLLER 38 #define JUNIPER_IFML_MFR 39 #define JUNIPER_IFML_LS 40 #define JUNIPER_IFML_ETHERNET_VPLS 41 #define JUNIPER_IFML_ETHERNET_VLAN_VPLS 42 #define JUNIPER_IFML_ETHERNET_EXTENDED_VLAN_VPLS 43 #define JUNIPER_IFML_LT 44 #define JUNIPER_IFML_SERVICES 45 #define JUNIPER_IFML_ETHER_VPLS_OVER_ATM 46 #define JUNIPER_IFML_FR_PORT_CCC 47 #define JUNIPER_IFML_FRAMERELAY_EXT_CCC 48 #define JUNIPER_IFML_FRAMERELAY_EXT_TCC 49 #define JUNIPER_IFML_FRAMERELAY_FLEX 50 #define JUNIPER_IFML_GGSNI 51 #define JUNIPER_IFML_ETHERNET_FLEX 52 #define JUNIPER_IFML_COLLECTOR 53 #define JUNIPER_IFML_AGGREGATOR 54 #define JUNIPER_IFML_LAPD 55 #define JUNIPER_IFML_PPPOE 56 #define JUNIPER_IFML_PPP_SUBORDINATE 57 #define JUNIPER_IFML_CISCOHDLC_SUBORDINATE 58 #define JUNIPER_IFML_DFC 59 #define JUNIPER_IFML_PICPEER 60 static const value_string juniper_ifmt_vals[] = { { JUNIPER_IFML_ETHER, "Ethernet" }, { JUNIPER_IFML_FDDI, "FDDI" }, { JUNIPER_IFML_TOKENRING, "Token-Ring" }, { JUNIPER_IFML_PPP, "PPP" }, { JUNIPER_IFML_PPP_SUBORDINATE, "PPP-Subordinate" }, { JUNIPER_IFML_FRAMERELAY, "Frame-Relay" }, { JUNIPER_IFML_CISCOHDLC, "Cisco-HDLC" }, { JUNIPER_IFML_SMDSDXI, "SMDS-DXI" }, { JUNIPER_IFML_ATMPVC, "ATM-PVC" }, { JUNIPER_IFML_PPP_CCC, "PPP-CCC" }, { JUNIPER_IFML_FRAMERELAY_CCC, "Frame-Relay-CCC" }, { JUNIPER_IFML_FRAMERELAY_EXT_CCC, "Extended FR-CCC" }, { JUNIPER_IFML_IPIP, "IP-over-IP" }, { JUNIPER_IFML_GRE, "GRE" }, { JUNIPER_IFML_PIM, "PIM-Encapsulator" }, { JUNIPER_IFML_PIMD, "PIM-Decapsulator" }, { JUNIPER_IFML_CISCOHDLC_CCC, "Cisco-HDLC-CCC" }, { JUNIPER_IFML_VLAN_CCC, "VLAN-CCC" }, { JUNIPER_IFML_EXTENDED_VLAN_CCC, "Extended-VLAN-CCC" }, { JUNIPER_IFML_MLPPP, "Multilink-PPP" }, { JUNIPER_IFML_MLFR, "Multilink-FR" }, { JUNIPER_IFML_MFR, "Multilink-FR-UNI-NNI" }, { JUNIPER_IFML_ML, "Multilink" }, { JUNIPER_IFML_LS, "LinkService" }, { JUNIPER_IFML_LSI, "LSI" }, { JUNIPER_IFML_ATM_CELLRELAY_CCC, "ATM-CCC-Cell-Relay" }, { JUNIPER_IFML_CRYPTO, "IPSEC-over-IP" }, { JUNIPER_IFML_GGSN, "GGSN" }, { JUNIPER_IFML_PPP_TCC, "PPP-TCC" }, { JUNIPER_IFML_FRAMERELAY_TCC, "Frame-Relay-TCC" }, { JUNIPER_IFML_FRAMERELAY_EXT_TCC, "Extended FR-TCC" }, { JUNIPER_IFML_CISCOHDLC_TCC, "Cisco-HDLC-TCC" }, { JUNIPER_IFML_ETHERNET_CCC, "Ethernet-CCC" }, { JUNIPER_IFML_VT, "VPN-Loopback-tunnel" }, { JUNIPER_IFML_ETHER_OVER_ATM, "Ethernet-over-ATM" }, { JUNIPER_IFML_ETHER_VPLS_OVER_ATM, "Ethernet-VPLS-over-ATM" }, { JUNIPER_IFML_MONITOR, "Monitor" }, { JUNIPER_IFML_ETHERNET_TCC, "Ethernet-TCC" }, { JUNIPER_IFML_VLAN_TCC, "VLAN-TCC" }, { JUNIPER_IFML_EXTENDED_VLAN_TCC, "Extended-VLAN-TCC" }, { JUNIPER_IFML_CONTROLLER, "Controller" }, { JUNIPER_IFML_ETHERNET_VPLS, "VPLS" }, { JUNIPER_IFML_ETHERNET_VLAN_VPLS, "VLAN-VPLS" }, { JUNIPER_IFML_ETHERNET_EXTENDED_VLAN_VPLS, "Extended-VLAN-VPLS" }, { JUNIPER_IFML_LT, "Logical-tunnel" }, { JUNIPER_IFML_SERVICES, "General-Services" }, { JUNIPER_IFML_PPPOE, "PPPoE" }, { JUNIPER_IFML_ETHERNET_FLEX, "Flexible-Ethernet-Services" }, { JUNIPER_IFML_FRAMERELAY_FLEX, "Flexible-FrameRelay" }, { JUNIPER_IFML_COLLECTOR, "Flow-collection" }, { JUNIPER_IFML_PICPEER, "PIC Peer" }, { JUNIPER_IFML_DFC, "Dynamic-Flow-Capture" }, {0, NULL} }; #define JUNIPER_IFLE_ATM_SNAP 2 #define JUNIPER_IFLE_ATM_NLPID 3 #define JUNIPER_IFLE_ATM_VCMUX 4 #define JUNIPER_IFLE_ATM_LLC 5 #define JUNIPER_IFLE_ATM_PPP_VCMUX 6 #define JUNIPER_IFLE_ATM_PPP_LLC 7 #define JUNIPER_IFLE_ATM_PPP_FUNI 8 #define JUNIPER_IFLE_ATM_CCC 9 #define JUNIPER_IFLE_FR_NLPID 10 #define JUNIPER_IFLE_FR_SNAP 11 #define JUNIPER_IFLE_FR_PPP 12 #define JUNIPER_IFLE_FR_CCC 13 #define JUNIPER_IFLE_ENET2 14 #define JUNIPER_IFLE_IEEE8023_SNAP 15 #define JUNIPER_IFLE_IEEE8023_LLC 16 #define JUNIPER_IFLE_PPP 17 #define JUNIPER_IFLE_CISCOHDLC 18 #define JUNIPER_IFLE_PPP_CCC 19 #define JUNIPER_IFLE_IPIP_NULL 20 #define JUNIPER_IFLE_PIM_NULL 21 #define JUNIPER_IFLE_GRE_NULL 22 #define JUNIPER_IFLE_GRE_PPP 23 #define JUNIPER_IFLE_PIMD_DECAPS 24 #define JUNIPER_IFLE_CISCOHDLC_CCC 25 #define JUNIPER_IFLE_ATM_CISCO_NLPID 26 #define JUNIPER_IFLE_VLAN_CCC 27 #define JUNIPER_IFLE_MLPPP 28 #define JUNIPER_IFLE_MLFR 29 #define JUNIPER_IFLE_LSI_NULL 30 #define JUNIPER_IFLE_AGGREGATE_UNUSED 31 #define JUNIPER_IFLE_ATM_CELLRELAY_CCC 32 #define JUNIPER_IFLE_CRYPTO 33 #define JUNIPER_IFLE_GGSN 34 #define JUNIPER_IFLE_ATM_TCC 35 #define JUNIPER_IFLE_FR_TCC 36 #define JUNIPER_IFLE_PPP_TCC 37 #define JUNIPER_IFLE_CISCOHDLC_TCC 38 #define JUNIPER_IFLE_ETHERNET_CCC 39 #define JUNIPER_IFLE_VT 40 #define JUNIPER_IFLE_ATM_EOA_LLC 41 #define JUNIPER_IFLE_EXTENDED_VLAN_CCC 42 #define JUNIPER_IFLE_ATM_SNAP_TCC 43 #define JUNIPER_IFLE_MONITOR 44 #define JUNIPER_IFLE_ETHERNET_TCC 45 #define JUNIPER_IFLE_VLAN_TCC 46 #define JUNIPER_IFLE_EXTENDED_VLAN_TCC 47 #define JUNIPER_IFLE_MFR 48 #define JUNIPER_IFLE_ETHERNET_VPLS 49 #define JUNIPER_IFLE_ETHERNET_VLAN_VPLS 50 #define JUNIPER_IFLE_ETHERNET_EXTENDED_VLAN_VPLS 51 #define JUNIPER_IFLE_SERVICES 52 #define JUNIPER_IFLE_ATM_ETHER_VPLS_ATM_LLC 53 #define JUNIPER_IFLE_FR_PORT_CCC 54 #define JUNIPER_IFLE_ATM_MLPPP_LLC 55 #define JUNIPER_IFLE_ATM_EOA_CCC 56 #define JUNIPER_IFLE_LT_VLAN 57 #define JUNIPER_IFLE_COLLECTOR 58 #define JUNIPER_IFLE_AGGREGATOR 59 #define JUNIPER_IFLE_LAPD 60 #define JUNIPER_IFLE_ATM_PPPOE_LLC 61 #define JUNIPER_IFLE_ETHERNET_PPPOE 62 #define JUNIPER_IFLE_PPPOE 63 #define JUNIPER_IFLE_PPP_SUBORDINATE 64 #define JUNIPER_IFLE_CISCOHDLC_SUBORDINATE 65 #define JUNIPER_IFLE_DFC 66 #define JUNIPER_IFLE_PICPEER 67 static const value_string juniper_ifle_vals[] = { { JUNIPER_IFLE_AGGREGATOR, "Aggregator" }, { JUNIPER_IFLE_ATM_CCC, "CCC over ATM" }, { JUNIPER_IFLE_ATM_CELLRELAY_CCC, "ATM CCC Cell Relay" }, { JUNIPER_IFLE_ATM_CISCO_NLPID, "CISCO compatible NLPID" }, { JUNIPER_IFLE_ATM_EOA_CCC, "Ethernet over ATM CCC" }, { JUNIPER_IFLE_ATM_EOA_LLC, "Ethernet over ATM LLC" }, { JUNIPER_IFLE_ATM_ETHER_VPLS_ATM_LLC, "Ethernet VPLS over ATM LLC" }, { JUNIPER_IFLE_ATM_LLC, "ATM LLC" }, { JUNIPER_IFLE_ATM_MLPPP_LLC, "MLPPP over ATM LLC" }, { JUNIPER_IFLE_ATM_NLPID, "ATM NLPID" }, { JUNIPER_IFLE_ATM_PPPOE_LLC, "PPPoE over ATM LLC" }, { JUNIPER_IFLE_ATM_PPP_FUNI, "PPP over FUNI" }, { JUNIPER_IFLE_ATM_PPP_LLC, "PPP over ATM LLC" }, { JUNIPER_IFLE_ATM_PPP_VCMUX, "PPP over ATM VCMUX" }, { JUNIPER_IFLE_ATM_SNAP, "ATM SNAP" }, { JUNIPER_IFLE_ATM_SNAP_TCC, "ATM SNAP TCC" }, { JUNIPER_IFLE_ATM_TCC, "ATM VCMUX TCC" }, { JUNIPER_IFLE_ATM_VCMUX, "ATM VCMUX" }, { JUNIPER_IFLE_CISCOHDLC, "C-HDLC" }, { JUNIPER_IFLE_CISCOHDLC_CCC, "C-HDLC CCC" }, { JUNIPER_IFLE_CISCOHDLC_SUBORDINATE, "C-HDLC via dialer" }, { JUNIPER_IFLE_CISCOHDLC_TCC, "C-HDLC TCC" }, { JUNIPER_IFLE_COLLECTOR, "Collector" }, { JUNIPER_IFLE_CRYPTO, "Crypto" }, { JUNIPER_IFLE_ENET2, "Ethernet" }, { JUNIPER_IFLE_ETHERNET_CCC, "Ethernet CCC" }, { JUNIPER_IFLE_ETHERNET_EXTENDED_VLAN_VPLS, "Extended VLAN VPLS" }, { JUNIPER_IFLE_ETHERNET_PPPOE, "PPPoE over Ethernet" }, { JUNIPER_IFLE_ETHERNET_TCC, "Ethernet TCC" }, { JUNIPER_IFLE_ETHERNET_VLAN_VPLS, "VLAN VPLS" }, { JUNIPER_IFLE_ETHERNET_VPLS, "VPLS" }, { JUNIPER_IFLE_EXTENDED_VLAN_CCC, "Extended VLAN CCC" }, { JUNIPER_IFLE_EXTENDED_VLAN_TCC, "Extended VLAN TCC" }, { JUNIPER_IFLE_FR_CCC, "FR CCC" }, { JUNIPER_IFLE_FR_NLPID, "FR NLPID" }, { JUNIPER_IFLE_FR_PORT_CCC, "FR CCC" }, { JUNIPER_IFLE_FR_PPP, "FR PPP" }, { JUNIPER_IFLE_FR_SNAP, "FR SNAP" }, { JUNIPER_IFLE_FR_TCC, "FR TCC" }, { JUNIPER_IFLE_GGSN, "GGSN" }, { JUNIPER_IFLE_GRE_NULL, "GRE NULL" }, { JUNIPER_IFLE_GRE_PPP, "PPP over GRE" }, { JUNIPER_IFLE_IPIP_NULL, "IPIP" }, { JUNIPER_IFLE_LAPD, "LAPD" }, { JUNIPER_IFLE_LSI_NULL, "LSI Null" }, { JUNIPER_IFLE_LT_VLAN, "LT VLAN" }, { JUNIPER_IFLE_MFR, "MFR" }, { JUNIPER_IFLE_MLFR, "MLFR" }, { JUNIPER_IFLE_MLPPP, "MLPPP" }, { JUNIPER_IFLE_MONITOR, "Monitor" }, { JUNIPER_IFLE_PIMD_DECAPS, "PIMd" }, { JUNIPER_IFLE_PIM_NULL, "PIM Null" }, { JUNIPER_IFLE_PPP, "PPP" }, { JUNIPER_IFLE_PPPOE, "PPPoE" }, { JUNIPER_IFLE_PPP_CCC, "PPP CCC" }, { JUNIPER_IFLE_PPP_SUBORDINATE, "" }, { JUNIPER_IFLE_PPP_TCC, "PPP TCC" }, { JUNIPER_IFLE_SERVICES, "General Services" }, { JUNIPER_IFLE_VLAN_CCC, "VLAN CCC" }, { JUNIPER_IFLE_VLAN_TCC, "VLAN TCC" }, { JUNIPER_IFLE_VT, "VT" }, {0, NULL} }; static int proto_juniper = -1; static int hf_juniper_magic = -1; static int hf_juniper_direction = -1; static int hf_juniper_l2hdr_presence = -1; static int hf_juniper_ext_total_len = -1; static int hf_juniper_cookie_len = -1; static int hf_juniper_atm1_cookie = -1; static int hf_juniper_atm2_cookie = -1; static int hf_juniper_mlpic_cookie = -1; static int hf_juniper_lspic_cookie = -1; static int hf_juniper_aspic_cookie = -1; static int hf_juniper_vlan = -1; static int hf_juniper_proto = -1; static int hf_juniper_payload_type = -1; static int hf_juniper_encap_type = -1; static int hf_juniper_ext_ifd = -1; static int hf_juniper_ext_ifl = -1; static int hf_juniper_ext_unit = -1; static int hf_juniper_ext_ifmt = -1; static int hf_juniper_ext_ifle = -1; static int hf_juniper_ext_ttp_ifmt = -1; static int hf_juniper_ext_ttp_ifle = -1; static int hf_juniper_unknown_data = -1; static expert_field ei_juniper_no_magic = EI_INIT; static gint ett_juniper = -1; static dissector_handle_t ipv4_handle; static dissector_handle_t data_handle; static dissector_table_t payload_table; static int dissect_juniper_payload_proto(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *juniper_subtree, guint proto, guint offset); static void dissect_juniper_atm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 atm_pictype); static gboolean ppp_heuristic_guess(guint16 proto); static guint ip_heuristic_guess(guint8 ip_header_byte); static guint juniper_svc_cookie_len (guint64 cookie); static guint juniper_svc_cookie_proto (guint64 cookie, guint16 pictype, guint8 flags); static const value_string juniper_proto_vals[] = { {JUNIPER_PROTO_IP, "IPv4"}, {JUNIPER_PROTO_MPLS_IP, "MPLS->IPv4"}, {JUNIPER_PROTO_IP_MPLS, "IPv4->MPLS"}, {JUNIPER_PROTO_IP6, "IPv6"}, {JUNIPER_PROTO_MPLS_IP6, "MPLS->IPv6"}, {JUNIPER_PROTO_IP6_MPLS, "IPv6->MPLS"}, {JUNIPER_PROTO_PPP, "PPP"}, {JUNIPER_PROTO_CLNP, "CLNP"}, {JUNIPER_PROTO_MPLS_CLNP, "MPLS->CLNP"}, {JUNIPER_PROTO_CLNP_MPLS, "CLNP->MPLS"}, {JUNIPER_PROTO_ISO, "OSI"}, {JUNIPER_PROTO_MPLS, "MPLS"}, {JUNIPER_PROTO_LLC, "LLC"}, {JUNIPER_PROTO_LLC_SNAP, "LLC/SNAP"}, {JUNIPER_PROTO_ETHER, "Ethernet"}, {JUNIPER_PROTO_OAM, "ATM OAM Cell"}, {JUNIPER_PROTO_Q933, "Q.933"}, {JUNIPER_PROTO_FRELAY, "Frame-Relay"}, {JUNIPER_PROTO_CHDLC, "C-HDLC"}, {0, NULL} }; /* return a TLV value based on TLV length and TLV type (host/network order) */ static int juniper_ext_get_tlv_value(tvbuff_t *tvb, guint tlv_type, guint tlv_len, guint offset) { int tlv_value; if (tlv_type < 128) { /* TLVs < 128 are little-endian / host order encoded */ switch (tlv_len) { case 1: tlv_value = tvb_get_guint8(tvb, offset); break; case 2: tlv_value = tvb_get_letohs(tvb, offset); break; case 3: tlv_value = tvb_get_letoh24(tvb, offset); break; case 4: tlv_value = tvb_get_letohl(tvb, offset); break; default: tlv_value = -1; break; } } else { /* TLVs >= 128 are big-endian / network order encoded */ switch (tlv_len) { case 1: tlv_value = tvb_get_guint8(tvb, offset); break; case 2: tlv_value = tvb_get_ntohs(tvb, offset); break; case 3: tlv_value = tvb_get_ntoh24(tvb, offset); break; case 4: tlv_value = tvb_get_ntohl(tvb, offset); break; default: tlv_value = -1; break; } } return tlv_value; } /* generic juniper header dissector */ static int dissect_juniper_header(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *juniper_subtree, guint8 *flags) { proto_item *tisub, *magic_item; guint8 l2hdr_presence,proto,ext_type,ext_len; guint16 ext_total_len,ext_offset=6,hdr_len; guint32 magic_number,ext_val; proto_tree *juniper_ext_subtree = NULL, *juniper_ext_subtree_item = NULL; magic_number = tvb_get_ntoh24(tvb, 0); *flags = tvb_get_guint8(tvb, 3); l2hdr_presence = *flags & JUNIPER_FLAG_NO_L2; magic_item = proto_tree_add_item(juniper_subtree, hf_juniper_magic, tvb, 0, 3, ENC_BIG_ENDIAN); /* be liberal with magic-number detection - * some older JUNOS releases (e.g. 6.4), * which are still in the field do not generate magic-numbers */ if (magic_number != JUNIPER_PCAP_MAGIC) { expert_add_info(pinfo, magic_item, &ei_juniper_no_magic); return 0; } proto_tree_add_item(juniper_subtree, hf_juniper_direction, tvb, 3, 1, ENC_NA); proto_tree_add_uint(juniper_subtree, hf_juniper_l2hdr_presence, tvb, 3, 1, l2hdr_presence); /* calculate hdr_len before cookie, payload */ /* meta-info extensions (JUNOS >= 7.5) ? */ if ((*flags & JUNIPER_FLAG_EXT) == JUNIPER_FLAG_EXT) { ext_total_len = tvb_get_ntohs(tvb,4); hdr_len = 6 + ext_total_len; /* MGC,flags,ext_total_len */ tisub = proto_tree_add_uint (juniper_subtree, hf_juniper_ext_total_len, tvb, 4, 2, ext_total_len); juniper_ext_subtree = proto_item_add_subtree(tisub, ett_juniper); while (ext_total_len > EXT_TLV_HEADER_SIZE) { ext_type = tvb_get_guint8(tvb, ext_offset); ext_len = tvb_get_guint8(tvb, ext_offset+1); if (ext_len == 0 || ext_len > (ext_total_len - EXT_TLV_HEADER_SIZE)) /* a few sanity checks */ break; juniper_ext_subtree_item = proto_tree_add_subtree_format(juniper_ext_subtree, tvb, ext_offset, EXT_TLV_HEADER_SIZE + ext_len, ett_juniper, &tisub, "%s Extension TLV #%u, length: %u", val_to_str_const(ext_type, ext_tlv_vals, "Unknown"), ext_type, ext_len); ext_val = juniper_ext_get_tlv_value(tvb, ext_type, ext_len, ext_offset+EXT_TLV_HEADER_SIZE); switch (ext_type) { case EXT_TLV_IFD_MEDIATYPE: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ifmt, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_TTP_IFD_MEDIATYPE: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ttp_ifmt, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_IFL_ENCAPS: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ifle, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_TTP_IFL_ENCAPS: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ttp_ifle, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_IFL_IDX: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ifl, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_IFL_UNIT: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_unit, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_IFD_IDX: proto_tree_add_uint(juniper_ext_subtree_item, hf_juniper_ext_ifd, tvb, ext_offset+EXT_TLV_HEADER_SIZE, ext_len, ext_val); break; case EXT_TLV_IFD_NAME: /* FIXME print ifname string - lets fall-through for now */ default: proto_item_append_text(tisub, "Unknown"); break; } ext_offset += EXT_TLV_HEADER_SIZE + ext_len; ext_total_len -= EXT_TLV_HEADER_SIZE + ext_len; } } else hdr_len = 4; /* MGC,flags */ if ((*flags & JUNIPER_FLAG_NO_L2) == JUNIPER_FLAG_NO_L2) { /* no link header present ? */ proto = tvb_get_letohl(tvb,hdr_len); /* proto is stored in host-order */ dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, proto, hdr_len + 4); return -1; } return hdr_len; /* bytes parsed */ } /* print the payload protocol */ static int dissect_juniper_payload_proto(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *juniper_subtree, guint proto, guint offset) { proto_item *ti; tvbuff_t *next_tvb; ti = proto_tree_add_uint(juniper_subtree, hf_juniper_payload_type, tvb, offset, 0, proto); PROTO_ITEM_SET_GENERATED(ti); if (proto == 0xa248) { proto_tree_add_item(juniper_subtree, hf_juniper_unknown_data, tvb, offset, 4, ENC_NA); next_tvb = tvb_new_subset_remaining(tvb, offset+4); call_dissector(ipv4_handle, next_tvb, pinfo, tree); } else { next_tvb = tvb_new_subset_remaining(tvb, offset); if (!dissector_try_uint(payload_table, proto, next_tvb, pinfo, tree)) { /* XXX - left in for posterity, dissection was never done */ /* case JUNIPER_PROTO_OAM: FIXME call OAM disector without leading HEC byte */ call_dissector(data_handle, next_tvb, pinfo, tree); } } return 0; } /* MLFR dissector */ static int dissect_juniper_mlfr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_item *ti; proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; guint64 aspic_cookie; guint32 lspic_cookie; guint16 mlpic_cookie; guint proto,cookie_len; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper MLFR"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper Multi-Link Frame-Relay (FRF.15)"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; aspic_cookie = tvb_get_ntoh64(tvb,offset); proto = juniper_svc_cookie_proto(aspic_cookie, JUNIPER_PIC_MLFR, flags); cookie_len = juniper_svc_cookie_len(aspic_cookie); if (cookie_len == AS_PIC_COOKIE_LEN) proto_tree_add_uint64(juniper_subtree, hf_juniper_aspic_cookie, tvb, offset, AS_PIC_COOKIE_LEN, aspic_cookie); if (cookie_len == LS_PIC_COOKIE_LEN) { lspic_cookie = tvb_get_ntohl(tvb,offset); proto_tree_add_uint(juniper_subtree, hf_juniper_lspic_cookie, tvb, offset, LS_PIC_COOKIE_LEN, lspic_cookie); } offset += cookie_len; mlpic_cookie = tvb_get_ntohs(tvb, offset); /* AS-PIC IS-IS */ if (cookie_len == AS_PIC_COOKIE_LEN && proto == JUNIPER_PROTO_UNKNOWN && tvb_get_guint8(tvb,offset) == JUNIPER_HDR_LLC_UI) { offset += 1; proto = JUNIPER_PROTO_ISO; } /* LS-PIC IS-IS */ if (cookie_len == LS_PIC_COOKIE_LEN) { if ( tvb_get_ntohs(tvb,offset) == JUNIPER_HDR_LLC_UI || tvb_get_ntohs(tvb,offset) == (JUNIPER_HDR_LLC_UI<<8)) { offset += 2; } } /* LS-PIC ? */ if (cookie_len == LS_PIC_COOKIE_LEN && tvb_get_guint8(tvb,offset) == JUNIPER_HDR_LLC_UI) { offset += 1; } /* child link of an LS-PIC bundle ? */ if (cookie_len == 0 && tvb_get_ntohs(tvb,offset+ML_PIC_COOKIE_LEN) == (JUNIPER_HDR_LLC_UI<<8 | NLPID_Q_933)) { cookie_len = ML_PIC_COOKIE_LEN; proto_tree_add_uint(juniper_subtree, hf_juniper_mlpic_cookie, tvb, offset, ML_PIC_COOKIE_LEN, mlpic_cookie); offset += 3; proto = JUNIPER_PROTO_Q933; } /* child link of an ML-, LS-, AS-PIC bundle / ML-PIC bundle ? */ if (cookie_len == 0) { if (tvb_get_ntohs(tvb,offset+ML_PIC_COOKIE_LEN) == JUNIPER_HDR_LLC_UI || tvb_get_ntohs(tvb,offset+ML_PIC_COOKIE_LEN) == (JUNIPER_HDR_LLC_UI<<8)) { cookie_len = ML_PIC_COOKIE_LEN; proto_tree_add_uint(juniper_subtree, hf_juniper_mlpic_cookie, tvb, offset, ML_PIC_COOKIE_LEN, mlpic_cookie); offset += 4; proto = JUNIPER_PROTO_ISO; } } /* ML-PIC bundle ? */ if (cookie_len == 0 && tvb_get_guint8(tvb,offset+ML_PIC_COOKIE_LEN) == JUNIPER_HDR_LLC_UI) { cookie_len = ML_PIC_COOKIE_LEN; proto_tree_add_uint(juniper_subtree, hf_juniper_mlpic_cookie, tvb, offset, ML_PIC_COOKIE_LEN, mlpic_cookie); offset += 3; proto = JUNIPER_PROTO_ISO; } ti = proto_tree_add_uint(juniper_subtree, hf_juniper_cookie_len, tvb, offset, 0, cookie_len); PROTO_ITEM_SET_GENERATED(ti); dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, proto, offset); return tvb_captured_length(tvb); } /* MLPPP dissector */ static int dissect_juniper_mlppp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_item *ti; proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; guint64 aspic_cookie; guint32 lspic_cookie; guint16 mlpic_cookie; guint proto,cookie_len; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper MLPPP"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper MLPPP"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; aspic_cookie = tvb_get_ntoh64(tvb,offset); proto = juniper_svc_cookie_proto(aspic_cookie, JUNIPER_PIC_MLPPP, flags); cookie_len = juniper_svc_cookie_len(aspic_cookie); if (cookie_len == AS_PIC_COOKIE_LEN) proto_tree_add_uint64(juniper_subtree, hf_juniper_aspic_cookie, tvb, offset, AS_PIC_COOKIE_LEN, aspic_cookie); if (cookie_len == LS_PIC_COOKIE_LEN) { lspic_cookie = tvb_get_ntohl(tvb,offset); proto_tree_add_uint(juniper_subtree, hf_juniper_lspic_cookie, tvb, offset, LS_PIC_COOKIE_LEN, lspic_cookie); } /* no cookie pattern identified - lets guess from now on */ /* child link of an LS-PIC bundle ? */ if (cookie_len == 0 && tvb_get_ntohs(tvb, offset) == JUNIPER_HDR_PPP) { proto = JUNIPER_PROTO_PPP; offset += 2; } /* ML-PIC ? */ if (cookie_len == 0 && ppp_heuristic_guess(tvb_get_ntohs(tvb, offset+2))) { proto = JUNIPER_PROTO_PPP; cookie_len = 2; mlpic_cookie = tvb_get_ntohs(tvb, offset); proto_tree_add_uint(juniper_subtree, hf_juniper_mlpic_cookie, tvb, offset, ML_PIC_COOKIE_LEN, mlpic_cookie); } /* child link of an ML-PIC bundle ? */ if (cookie_len == 0 && ppp_heuristic_guess(tvb_get_ntohs(tvb, offset))) { proto = JUNIPER_PROTO_PPP; } ti = proto_tree_add_uint(juniper_subtree, hf_juniper_cookie_len, tvb, offset, 0, cookie_len); PROTO_ITEM_SET_GENERATED(ti); offset += cookie_len; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, proto, offset); return tvb_captured_length(tvb); } /* PPPoE dissector */ static int dissect_juniper_pppoe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper PPPoE"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper PPPoE PIC"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_ETHER, offset); return tvb_captured_length(tvb); } /* Ethernet dissector */ static int dissect_juniper_ether(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper Ethernet"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper Ethernet"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_ETHER, offset); return tvb_captured_length(tvb); } /* PPP dissector */ static int dissect_juniper_ppp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper PPP"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper PPP"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_PPP, offset+2); return tvb_captured_length(tvb); } /* Frame-Relay dissector */ static int dissect_juniper_frelay(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper Frame-Relay"); col_clear(pinfo->cinfo, COL_INFO); offset = 0; juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper Frame-Relay"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_FRELAY, offset); return tvb_captured_length(tvb); } /* C-HDLC dissector */ static int dissect_juniper_chdlc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset = 0; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper C-HDLC"); col_clear(pinfo->cinfo, COL_INFO); juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper C-HDLC"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_CHDLC, offset); return tvb_captured_length(tvb); } /* wrapper for passing the PIC type to the generic ATM dissector */ static int dissect_juniper_atm1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { dissect_juniper_atm(tvb,pinfo,tree, JUNIPER_PIC_ATM1); return tvb_captured_length(tvb); } /* wrapper for passing the PIC type to the generic ATM dissector */ static int dissect_juniper_atm2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { dissect_juniper_atm(tvb,pinfo,tree, JUNIPER_PIC_ATM2); return tvb_captured_length(tvb); } /* generic ATM dissector */ static void dissect_juniper_atm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 atm_pictype) { proto_item *ti; proto_tree* juniper_subtree; guint8 next_proto = JUNIPER_PROTO_UNKNOWN,atm1_header_len,atm2_header_len,flags; guint32 cookie1, proto; guint64 cookie2; guint offset = 0; int bytes_processed; tvbuff_t *next_tvb; col_clear(pinfo->cinfo, COL_INFO); switch (atm_pictype) { case JUNIPER_PIC_ATM1: col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper ATM1"); juniper_subtree = proto_tree_add_subtree(tree, tvb, 0, 0 , ett_juniper, NULL, "Juniper ATM1 PIC"); break; case JUNIPER_PIC_ATM2: col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper ATM2"); juniper_subtree = proto_tree_add_subtree(tree, tvb, 0, 0 , ett_juniper, NULL, "Juniper ATM2 PIC"); break; default: /* should not happen */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper ATM unknown"); proto_tree_add_subtree(tree, tvb, 0, 0 , ett_juniper, NULL, "Juniper unknown ATM PIC"); return; } /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return; else offset+=bytes_processed; if ((flags & JUNIPER_FLAG_NO_L2) == JUNIPER_FLAG_NO_L2) { atm1_header_len = 4; atm2_header_len = 4; } else { atm1_header_len = 4; atm2_header_len = 8; } cookie1 = tvb_get_ntohl(tvb, offset); cookie2 = tvb_get_ntoh64(tvb, offset); if (atm_pictype == JUNIPER_PIC_ATM1) { proto_tree_add_uint(juniper_subtree, hf_juniper_atm1_cookie, tvb, offset, 4, cookie1); offset += atm1_header_len; if ((cookie1 >> 24) == 0x80) /* OAM cell ? */ next_proto = JUNIPER_PROTO_OAM; } else { /* JUNIPER_PIC_ATM2 */ proto_tree_add_uint64(juniper_subtree, hf_juniper_atm2_cookie, tvb, offset, 8, cookie2); offset += atm2_header_len; if (cookie2 & 0x70) /* OAM cell ? */ next_proto = JUNIPER_PROTO_OAM; } next_tvb = tvb_new_subset_remaining(tvb, offset); if (next_proto == JUNIPER_PROTO_OAM) { dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_OAM, offset); return; } proto = tvb_get_ntoh24(tvb, offset); /* first try: 24-Bit guess */ if (proto == JUNIPER_HDR_NLPID) { /* * This begins with something that appears to be an LLC header for * OSI; is this LLC-multiplexed traffic? */ dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_LLC, offset); return; } if (proto == JUNIPER_HDR_SNAP) { /* * This begins with something that appears to be an LLC header for * SNAP; is this LLC-multiplexed traffic? */ dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_LLC_SNAP, offset); return; } if ((flags & JUNIPER_FLAG_PKT_IN) != JUNIPER_FLAG_PKT_IN && /* ether-over-1483 encaps ? */ (cookie1 & JUNIPER_ATM2_GAP_COUNT_MASK) && atm_pictype != JUNIPER_PIC_ATM1) { dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_ETHER, offset); return; } proto = tvb_get_ntohs(tvb, offset); /* second try: 16-Bit guess */ if ( ppp_heuristic_guess( (guint16) proto) && atm_pictype != JUNIPER_PIC_ATM1) { /* * This begins with something that appears to be a PPP protocol * type; is this VC-multiplexed PPPoA? * That's not supported on ATM1 PICs. */ proto_tree_add_uint_format_value(juniper_subtree, hf_juniper_encap_type, tvb, offset, 0, 0, "VC-MUX"); dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_PPP, offset); return; } proto = tvb_get_guint8(tvb, offset); /* third try: 8-Bit guess */ if ( proto == JUNIPER_HDR_LLC_UI ) { /* * Cisco style NLPID encaps? * Is the 0x03 an LLC UI control field? */ proto_tree_add_uint_format_value(juniper_subtree, hf_juniper_encap_type, tvb, offset, 1, 1, "Cisco NLPID"); dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_ISO, offset+1); return; } next_proto = ip_heuristic_guess( (guint8) proto); if (next_proto != JUNIPER_PROTO_UNKNOWN) { /* last resort: VC-MUX encaps ? */ /* * This begins with something that might be the first byte of * an IPv4 or IPv6 packet; is this VC-multiplexed IP? */ proto_tree_add_uint_format_value(juniper_subtree, hf_juniper_encap_type, tvb, offset, 0, 2, "VC-MUX"); dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, next_proto, offset); return; } /* could not figure what it is */ ti = proto_tree_add_uint_format_value(juniper_subtree, hf_juniper_payload_type, tvb, offset, 0, 0xFFFF, "Unknown"); proto_item_set_len(ti, tvb_reported_length_remaining(tvb, offset)); call_dissector(data_handle, next_tvb, pinfo, tree); } static int dissect_juniper_ggsn(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) { proto_tree* juniper_subtree; guint offset = 0; int bytes_processed; guint8 flags; guint16 proto; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper GGSN"); col_clear(pinfo->cinfo, COL_INFO); juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper GGSN"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; proto = tvb_get_letohs(tvb, offset); /* fetch protocol */ proto_tree_add_uint(juniper_subtree, hf_juniper_proto, tvb, offset, 2, proto); proto_tree_add_item(juniper_subtree, hf_juniper_vlan, tvb, offset+2, 2, ENC_LITTLE_ENDIAN); offset += 4; dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, proto, offset); return tvb_captured_length(tvb); } static int dissect_juniper_vp(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) { proto_tree* juniper_subtree; guint offset = 0; int bytes_processed; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper Voice PIC"); col_clear(pinfo->cinfo, COL_INFO); juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper Voice PIC"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if(bytes_processed == -1) return 4; else offset+=bytes_processed; /* * Right know IPv4 is the only protocol we may encounter. * For the future there should be sufficient space in the 18-byte * empty header before payload starts. */ dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_IP, offset+18); return tvb_captured_length(tvb); } /* Wrapper for Juniper service PIC coookie dissector */ static int dissect_juniper_svcs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree* juniper_subtree; guint offset = 0; int bytes_processed = 0; guint8 flags; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Juniper Services"); col_clear(pinfo->cinfo, COL_INFO); juniper_subtree = proto_tree_add_subtree(tree, tvb, offset, 4, ett_juniper, NULL, "Juniper Services cookie"); /* parse header, match mgc, extract flags and build first tree */ bytes_processed = dissect_juniper_header(tvb, pinfo, tree, juniper_subtree, &flags); if (bytes_processed == -1) return 4; else offset+=bytes_processed; if (flags & JUNIPER_FLAG_PKT_IN) { proto_tree_add_uint(juniper_subtree, hf_juniper_proto, tvb, offset, 2, JUNIPER_PROTO_IP); offset += 16; } else { offset += 12; } dissect_juniper_payload_proto(tvb, pinfo, tree, juniper_subtree, JUNIPER_PROTO_IP, offset); return tvb_captured_length(tvb); } /* list of Juniper supported PPP proto IDs */ static gboolean ppp_heuristic_guess(guint16 proto) { switch(proto) { case PPP_IP : case PPP_OSI : case PPP_MPLS_UNI : case PPP_MPLS_MULTI : case PPP_IPCP : case PPP_OSINLCP : case PPP_MPLSCP : case PPP_LCP : case PPP_PAP : case PPP_CHAP : case PPP_MP : case PPP_IPV6 : case PPP_IPV6CP : return TRUE; default: return FALSE; /* did not find a ppp header */ } } /* * return the IP version number based on the first byte of the IP header * returns 0 if it does not match a valid first IPv4/IPv6 header byte */ static guint ip_heuristic_guess(guint8 ip_header_byte) { switch(ip_header_byte) { case 0x45: case 0x46: case 0x47: case 0x48: case 0x49: case 0x4a: case 0x4b: case 0x4c: case 0x4d: case 0x4e: case 0x4f: return JUNIPER_PROTO_IP; case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x65: case 0x66: case 0x67: case 0x68: case 0x69: case 0x6a: case 0x6b: case 0x6c: case 0x6d: case 0x6e: case 0x6f: return JUNIPER_PROTO_IP6; default: return JUNIPER_PROTO_UNKNOWN; /* did not find a ip header */ } } /* return cookie length dep. on cookie SVC id */ static guint juniper_svc_cookie_len (guint64 cookie) { guint8 svc_cookie_id; svc_cookie_id = (guint8)(cookie >> 56) & 0xff; switch(svc_cookie_id) { case 0x54: return LS_PIC_COOKIE_LEN; case GSP_SVC_REQ_APOLLO: case GSP_SVC_REQ_LSQ: return AS_PIC_COOKIE_LEN; default: return 0; } } /* return the next-level protocol based on cookie input */ static guint juniper_svc_cookie_proto (guint64 cookie, guint16 pictype, guint8 flags) { guint8 svc_cookie_id; guint16 lsq_proto; guint8 lsq_dir; svc_cookie_id = (guint8)(cookie >> 56) & 0xff; lsq_proto = (guint16)((cookie >> 16) & LSQ_L3_PROTO_MASK); lsq_dir = (guint8)(cookie >> 24) & 0x3; switch (svc_cookie_id) { case 0x54: switch (pictype) { case JUNIPER_PIC_MLPPP: return JUNIPER_PROTO_PPP; case JUNIPER_PIC_MLFR: return JUNIPER_PROTO_ISO; default: return JUNIPER_PROTO_UNKNOWN; } case GSP_SVC_REQ_APOLLO: case GSP_SVC_REQ_LSQ: switch(lsq_proto) { case LSQ_L3_PROTO_IPV4: switch(pictype) { case JUNIPER_PIC_MLPPP: /* incoming traffic would have the direction bits set * -> this must be IS-IS over PPP */ if ((flags & JUNIPER_FLAG_PKT_IN) == JUNIPER_FLAG_PKT_IN && lsq_dir != (LSQ_COOKIE_RE|LSQ_COOKIE_DIR)) return JUNIPER_PROTO_PPP; else return JUNIPER_PROTO_IP; case JUNIPER_PIC_MLFR: if (lsq_dir == (LSQ_COOKIE_RE|LSQ_COOKIE_DIR)) return JUNIPER_PROTO_UNKNOWN; else return JUNIPER_PROTO_IP; default: return JUNIPER_PROTO_UNKNOWN; } case LSQ_L3_PROTO_IPV6: return JUNIPER_PROTO_IP6; case LSQ_L3_PROTO_MPLS: return JUNIPER_PROTO_MPLS; case LSQ_L3_PROTO_ISO: return JUNIPER_PROTO_ISO; default: return JUNIPER_PROTO_UNKNOWN; } default: return JUNIPER_PROTO_UNKNOWN; } } void proto_register_juniper(void) { static hf_register_info hf[] = { { &hf_juniper_magic, { "Magic Number", "juniper.magic-number", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_direction, { "Direction", "juniper.direction", FT_UINT8, BASE_HEX, VALS(juniper_direction_vals), 0x0, NULL, HFILL }}, { &hf_juniper_l2hdr_presence, { "L2 header presence", "juniper.l2hdr", FT_UINT8, BASE_HEX, VALS(juniper_l2hdr_presence_vals), 0x0, NULL, HFILL }}, { &hf_juniper_ext_total_len, { "Extension(s) Total length", "juniper.ext_total_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_cookie_len, { "Cookie length", "juniper.cookie_len", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_atm2_cookie, { "Cookie", "juniper.atm2.cookie", FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_atm1_cookie, { "Cookie", "juniper.atm1.cookie", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_mlpic_cookie, { "Cookie", "juniper.mlpic.cookie", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_lspic_cookie, { "Cookie", "juniper.lspic.cookie", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_aspic_cookie, { "Cookie", "juniper.aspic.cookie", FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_vlan, { "VLan ID", "juniper.vlan", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_proto, { "Protocol", "juniper.proto", FT_UINT16, BASE_DEC, VALS(juniper_proto_vals), 0x0, NULL, HFILL }}, { &hf_juniper_payload_type, { "Payload Type", "juniper.payload_type", FT_UINT16, BASE_DEC, VALS(juniper_proto_vals), 0x0, NULL, HFILL }}, { &hf_juniper_encap_type, { "Encapsulation Type", "juniper.encap_type", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_ext_ifd, /* Juniper PCAP extensions */ { "Device Interface Index", "juniper.ext.ifd", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_ext_ifl, { "Logical Interface Index", "juniper.ext.ifl", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_ext_unit, { "Logical Unit Number", "juniper.ext.unit", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_juniper_ext_ifmt, { "Device Media Type", "juniper.ext.ifmt", FT_UINT16, BASE_DEC, VALS(juniper_ifmt_vals), 0x0, NULL, HFILL }}, { &hf_juniper_ext_ifle, { "Logical Interface Encapsulation", "juniper.ext.ifle", FT_UINT16, BASE_DEC, VALS(juniper_ifle_vals), 0x0, NULL, HFILL }}, { &hf_juniper_ext_ttp_ifmt, { "TTP derived Device Media Type", "juniper.ext.ttp_ifmt", FT_UINT16, BASE_DEC, VALS(juniper_ifmt_vals), 0x0, NULL, HFILL }}, { &hf_juniper_ext_ttp_ifle, { "TTP derived Logical Interface Encapsulation", "juniper.ext.ttp_ifle", FT_UINT16, BASE_DEC, VALS(juniper_ifle_vals), 0x0, NULL, HFILL }}, { &hf_juniper_unknown_data, { "Unknown data", "juniper.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, }; static gint *ett[] = { &ett_juniper, }; static ei_register_info ei[] = { { &ei_juniper_no_magic, { "juniper.magic-number.none", PI_PROTOCOL, PI_WARN, "No Magic-Number found!", EXPFILL }}, }; expert_module_t* expert_juniper; proto_juniper = proto_register_protocol("Juniper", "Juniper", "juniper"); proto_register_field_array(proto_juniper, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_juniper = expert_register_protocol(proto_juniper); expert_register_field_array(expert_juniper, ei, array_length(ei)); payload_table = register_dissector_table("juniper.proto", "Juniper payload dissectors", FT_UINT32, BASE_HEX, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE); } void proto_reg_handoff_juniper(void) { dissector_handle_t juniper_atm1_handle; dissector_handle_t juniper_atm2_handle; dissector_handle_t juniper_pppoe_handle; dissector_handle_t juniper_mlppp_handle; dissector_handle_t juniper_mlfr_handle; dissector_handle_t juniper_ether_handle; dissector_handle_t juniper_ppp_handle; dissector_handle_t juniper_frelay_handle; dissector_handle_t juniper_chdlc_handle; dissector_handle_t juniper_ggsn_handle; dissector_handle_t juniper_vp_handle; dissector_handle_t juniper_svcs_handle; ipv4_handle = find_dissector("ip"); data_handle = find_dissector("data"); juniper_atm2_handle = create_dissector_handle(dissect_juniper_atm2, proto_juniper); juniper_atm1_handle = create_dissector_handle(dissect_juniper_atm1, proto_juniper); juniper_pppoe_handle = create_dissector_handle(dissect_juniper_pppoe, proto_juniper); juniper_mlppp_handle = create_dissector_handle(dissect_juniper_mlppp, proto_juniper); juniper_mlfr_handle = create_dissector_handle(dissect_juniper_mlfr, proto_juniper); juniper_ether_handle = create_dissector_handle(dissect_juniper_ether, proto_juniper); juniper_ppp_handle = create_dissector_handle(dissect_juniper_ppp, proto_juniper); juniper_frelay_handle = create_dissector_handle(dissect_juniper_frelay, proto_juniper); juniper_chdlc_handle = create_dissector_handle(dissect_juniper_chdlc, proto_juniper); juniper_ggsn_handle = create_dissector_handle(dissect_juniper_ggsn, proto_juniper); juniper_vp_handle = create_dissector_handle(dissect_juniper_vp, proto_juniper); juniper_svcs_handle = create_dissector_handle(dissect_juniper_svcs, proto_juniper); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_ATM2, juniper_atm2_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_ATM1, juniper_atm1_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_PPPOE, juniper_pppoe_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_MLPPP, juniper_mlppp_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_MLFR, juniper_mlfr_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_ETHER, juniper_ether_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_PPP, juniper_ppp_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_FRELAY, juniper_frelay_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_CHDLC, juniper_chdlc_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_GGSN, juniper_ggsn_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_VP, juniper_vp_handle); dissector_add_uint("wtap_encap", WTAP_ENCAP_JUNIPER_SVCS, juniper_svcs_handle); } /* * Editor modelines * * Local Variables: * c-basic-offset: 2 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=2 tabstop=8 expandtab: * :indentSize=2:tabSize=8:noTabs=true: */