/* Do not modify this file. Changes will be overwritten. */ /* Generated automatically by the ASN.1 to Wireshark dissector compiler */ /* packet-rtse.c */ /* asn2wrs.py -b -q -L -p rtse -c ./rtse.cnf -s ./packet-rtse-template -D . -O ../.. rtse.asn */ /* packet-rtse-template.c * Routines for RTSE packet dissection * Graeme Lunt 2005 * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #include #include #include #include #include "packet-ber.h" #include "packet-pres.h" #include "packet-acse.h" #include "packet-ros.h" #include "packet-rtse.h" #define PNAME "X.228 OSI Reliable Transfer Service" #define PSNAME "RTSE" #define PFNAME "rtse" void proto_register_rtse(void); void proto_reg_handoff_rtse(void); /* Initialize the protocol and registered fields */ static int proto_rtse; static bool open_request=false; static uint32_t app_proto=0; static proto_tree *top_tree; /* Preferences */ static bool rtse_reassemble = true; static int hf_rtse_rtorq_apdu; /* RTORQapdu */ static int hf_rtse_rtoac_apdu; /* RTOACapdu */ static int hf_rtse_rtorj_apdu; /* RTORJapdu */ static int hf_rtse_rttp_apdu; /* RTTPapdu */ static int hf_rtse_rttr_apdu; /* RTTRapdu */ static int hf_rtse_rtab_apdu; /* RTABapdu */ static int hf_rtse_checkpointSize; /* INTEGER */ static int hf_rtse_windowSize; /* INTEGER */ static int hf_rtse_dialogueMode; /* T_dialogueMode */ static int hf_rtse_connectionDataRQ; /* ConnectionData */ static int hf_rtse_applicationProtocol; /* T_applicationProtocol */ static int hf_rtse_connectionDataAC; /* ConnectionData */ static int hf_rtse_refuseReason; /* RefuseReason */ static int hf_rtse_userDataRJ; /* T_userDataRJ */ static int hf_rtse_abortReason; /* AbortReason */ static int hf_rtse_reflectedParameter; /* BIT_STRING */ static int hf_rtse_userdataAB; /* T_userdataAB */ static int hf_rtse_open; /* T_open */ static int hf_rtse_recover; /* SessionConnectionIdentifier */ static int hf_rtse_callingSSuserReference; /* CallingSSuserReference */ static int hf_rtse_commonReference; /* CommonReference */ static int hf_rtse_additionalReferenceInformation; /* AdditionalReferenceInformation */ static int hf_rtse_t61String; /* T_t61String */ static int hf_rtse_octetString; /* T_octetString */ /* Initialize the subtree pointers */ static int ett_rtse; static int ett_rtse_RTSE_apdus; static int ett_rtse_RTORQapdu; static int ett_rtse_RTOACapdu; static int ett_rtse_RTORJapdu; static int ett_rtse_RTABapdu; static int ett_rtse_ConnectionData; static int ett_rtse_SessionConnectionIdentifier; static int ett_rtse_CallingSSuserReference; static expert_field ei_rtse_dissector_oid_not_implemented; static expert_field ei_rtse_unknown_rtse_pdu; static expert_field ei_rtse_abstract_syntax; static dissector_table_t rtse_oid_dissector_table; static dissector_handle_t rtse_handle; static int ett_rtse_unknown; static reassembly_table rtse_reassembly_table; static int hf_rtse_segment_data; static int hf_rtse_fragments; static int hf_rtse_fragment; static int hf_rtse_fragment_overlap; static int hf_rtse_fragment_overlap_conflicts; static int hf_rtse_fragment_multiple_tails; static int hf_rtse_fragment_too_long_fragment; static int hf_rtse_fragment_error; static int hf_rtse_fragment_count; static int hf_rtse_reassembled_in; static int hf_rtse_reassembled_length; static int ett_rtse_fragment; static int ett_rtse_fragments; static const fragment_items rtse_frag_items = { /* Fragment subtrees */ &ett_rtse_fragment, &ett_rtse_fragments, /* Fragment fields */ &hf_rtse_fragments, &hf_rtse_fragment, &hf_rtse_fragment_overlap, &hf_rtse_fragment_overlap_conflicts, &hf_rtse_fragment_multiple_tails, &hf_rtse_fragment_too_long_fragment, &hf_rtse_fragment_error, &hf_rtse_fragment_count, /* Reassembled in field */ &hf_rtse_reassembled_in, /* Reassembled length field */ &hf_rtse_reassembled_length, /* Reassembled data field */ NULL, /* Tag */ "RTSE fragments" }; void register_rtse_oid_dissector_handle(const char *oid, dissector_handle_t dissector, int proto, const char *name, bool uses_ros) { /* XXX: Note that this fcn is called from proto_reg_handoff in *other* dissectors ... */ static dissector_handle_t ros_handle = NULL; if (ros_handle == NULL) ros_handle = find_dissector("ros"); /* register RTSE with the BER (ACSE) */ register_ber_oid_dissector_handle(oid, rtse_handle, proto, name); if (uses_ros) { /* make sure we call ROS ... */ dissector_add_string("rtse.oid", oid, ros_handle); /* and then tell ROS how to dissect the AS*/ if (dissector != NULL) register_ros_oid_dissector_handle(oid, dissector, proto, name, true); } else { /* otherwise we just remember how to dissect the AS */ dissector_add_string("rtse.oid", oid, dissector); } } static int call_rtse_oid_callback(const char *oid, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, void* data) { tvbuff_t *next_tvb; int len; next_tvb = tvb_new_subset_remaining(tvb, offset); if ((len = dissector_try_string(rtse_oid_dissector_table, oid, next_tvb, pinfo, tree, data)) == 0) { proto_item *item; proto_tree *next_tree; next_tree = proto_tree_add_subtree_format(tree, next_tvb, 0, -1, ett_rtse_unknown, &item, "RTSE: Dissector for OID:%s not implemented. Contact Wireshark developers if you want this supported", oid); expert_add_info_format(pinfo, item, &ei_rtse_dissector_oid_not_implemented, "RTSE: Dissector for OID %s not implemented", oid); len = dissect_unknown_ber(pinfo, next_tvb, offset, next_tree); } offset += len; return offset; } static int call_rtse_external_type_callback(bool implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { const char *oid = NULL; if (actx->external.indirect_ref_present) { oid = (const char *)find_oid_by_pres_ctx_id(actx->pinfo, actx->external.indirect_reference); if (!oid) proto_tree_add_expert_format(tree, actx->pinfo, &ei_rtse_abstract_syntax, tvb, offset, tvb_captured_length_remaining(tvb, offset), "Unable to determine abstract syntax for indirect reference: %d.", actx->external.indirect_reference); } else if (actx->external.direct_ref_present) { oid = actx->external.direct_reference; } if (oid) offset = call_rtse_oid_callback(oid, tvb, offset, actx->pinfo, top_tree ? top_tree : tree, actx->private_data); return offset; } static int dissect_rtse_INTEGER(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, NULL); return offset; } static const value_string rtse_T_dialogueMode_vals[] = { { 0, "monologue" }, { 1, "twa" }, { 0, NULL } }; static int dissect_rtse_T_dialogueMode(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, NULL); return offset; } static int dissect_rtse_T_open(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { struct SESSION_DATA_STRUCTURE* session = (struct SESSION_DATA_STRUCTURE*)actx->private_data; const char *oid = NULL; switch(app_proto) { case 1: /* mts-transfer-protocol-1984 */ oid = "applicationProtocol.1"; break; case 12: /* mts-transfer-protocol */ oid = "applicationProtocol.12"; break; default: if(session && session->pres_ctx_id) oid = find_oid_by_pres_ctx_id(actx->pinfo, session->pres_ctx_id); break; } if(!oid) /* XXX: problem here is we haven't decoded the applicationProtocol yet - so we make assumptions! */ oid = "applicationProtocol.12"; if(oid) { offset = call_rtse_oid_callback(oid, tvb, offset, actx->pinfo, top_tree ? top_tree : tree, session); } /* else XXX: need to flag we can't find the presentation context */ return offset; } static int dissect_rtse_T_t61String(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { tvbuff_t *string = NULL; offset = dissect_ber_restricted_string(implicit_tag, BER_UNI_TAG_TeletexString, actx, tree, tvb, offset, hf_index, &string); if(open_request && string) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " %s", tvb_get_string_enc(actx->pinfo->pool, string, 0, tvb_reported_length(string), ENC_T61)); return offset; } static int dissect_rtse_T_octetString(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { tvbuff_t *string = NULL; offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &string); if(open_request && string) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " %s", tvb_format_text(actx->pinfo->pool, string, 0, tvb_reported_length(string))); return offset; } static const value_string rtse_CallingSSuserReference_vals[] = { { 0, "t61String" }, { 1, "octetString" }, { 0, NULL } }; static const ber_choice_t CallingSSuserReference_choice[] = { { 0, &hf_rtse_t61String , BER_CLASS_UNI, BER_UNI_TAG_TeletexString, BER_FLAGS_NOOWNTAG, dissect_rtse_T_t61String }, { 1, &hf_rtse_octetString , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_rtse_T_octetString }, { 0, NULL, 0, 0, 0, NULL } }; static int dissect_rtse_CallingSSuserReference(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_choice(actx, tree, tvb, offset, CallingSSuserReference_choice, hf_index, ett_rtse_CallingSSuserReference, NULL); return offset; } static int dissect_rtse_CommonReference(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { tvbuff_t *string = NULL; offset = dissect_ber_UTCTime(implicit_tag, actx, tree, tvb, offset, hf_index, NULL, NULL); if(open_request && string) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " %s", tvb_format_text(actx->pinfo->pool, string, 0, tvb_reported_length(string))); return offset; } static int dissect_rtse_AdditionalReferenceInformation(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_restricted_string(implicit_tag, BER_UNI_TAG_TeletexString, actx, tree, tvb, offset, hf_index, NULL); return offset; } static const ber_sequence_t SessionConnectionIdentifier_sequence[] = { { &hf_rtse_callingSSuserReference, BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_rtse_CallingSSuserReference }, { &hf_rtse_commonReference, BER_CLASS_UNI, BER_UNI_TAG_UTCTime, BER_FLAGS_NOOWNTAG, dissect_rtse_CommonReference }, { &hf_rtse_additionalReferenceInformation, BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_AdditionalReferenceInformation }, { NULL, 0, 0, 0, NULL } }; static int dissect_rtse_SessionConnectionIdentifier(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { if(open_request){ col_append_str(actx->pinfo->cinfo, COL_INFO, "Recover"); } offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset, SessionConnectionIdentifier_sequence, hf_index, ett_rtse_SessionConnectionIdentifier); return offset; } static const value_string rtse_ConnectionData_vals[] = { { 0, "open" }, { 1, "recover" }, { 0, NULL } }; static const ber_choice_t ConnectionData_choice[] = { { 0, &hf_rtse_open , BER_CLASS_CON, 0, 0, dissect_rtse_T_open }, { 1, &hf_rtse_recover , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_rtse_SessionConnectionIdentifier }, { 0, NULL, 0, 0, 0, NULL } }; static int dissect_rtse_ConnectionData(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_choice(actx, tree, tvb, offset, ConnectionData_choice, hf_index, ett_rtse_ConnectionData, NULL); return offset; } static const value_string rtse_T_applicationProtocol_vals[] = { { 12, "mts-transfer-protocol" }, { 1, "mts-transfer-protocol-1984" }, { 0, NULL } }; static int dissect_rtse_T_applicationProtocol(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_integer(true, actx, tree, tvb, offset, hf_index, &app_proto); return offset; } static const ber_sequence_t RTORQapdu_set[] = { { &hf_rtse_checkpointSize , BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_INTEGER }, { &hf_rtse_windowSize , BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_INTEGER }, { &hf_rtse_dialogueMode , BER_CLASS_CON, 2, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_T_dialogueMode }, { &hf_rtse_connectionDataRQ, BER_CLASS_CON, 3, BER_FLAGS_NOTCHKTAG, dissect_rtse_ConnectionData }, { &hf_rtse_applicationProtocol, BER_CLASS_CON, 4, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_T_applicationProtocol }, { NULL, 0, 0, 0, NULL } }; int dissect_rtse_RTORQapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { struct SESSION_DATA_STRUCTURE* session = (struct SESSION_DATA_STRUCTURE*)actx->private_data; if(session != NULL) session->ros_op = (ROS_OP_BIND | ROS_OP_ARGUMENT); open_request=true; offset = dissect_ber_set(implicit_tag, actx, tree, tvb, offset, RTORQapdu_set, hf_index, ett_rtse_RTORQapdu); open_request=false; return offset; } static const ber_sequence_t RTOACapdu_set[] = { { &hf_rtse_checkpointSize , BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_INTEGER }, { &hf_rtse_windowSize , BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_INTEGER }, { &hf_rtse_connectionDataAC, BER_CLASS_CON, 2, BER_FLAGS_NOTCHKTAG, dissect_rtse_ConnectionData }, { NULL, 0, 0, 0, NULL } }; int dissect_rtse_RTOACapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { struct SESSION_DATA_STRUCTURE* session = (struct SESSION_DATA_STRUCTURE*)actx->private_data; if(session != NULL) session->ros_op = (ROS_OP_BIND | ROS_OP_RESULT); offset = dissect_ber_set(implicit_tag, actx, tree, tvb, offset, RTOACapdu_set, hf_index, ett_rtse_RTOACapdu); return offset; } static const value_string rtse_RefuseReason_vals[] = { { 0, "rtsBusy" }, { 1, "cannotRecover" }, { 2, "validationFailure" }, { 3, "unacceptableDialogueMode" }, { 0, NULL } }; static int dissect_rtse_RefuseReason(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { int reason = -1; offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, &reason); if(reason != -1) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " (%s)", val_to_str(reason, rtse_RefuseReason_vals, "reason(%d)")); return offset; } static int dissect_rtse_T_userDataRJ(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { struct SESSION_DATA_STRUCTURE* session = (struct SESSION_DATA_STRUCTURE*)actx->private_data; const char *oid = NULL; switch(app_proto) { case 1: /* mts-transfer-protocol-1984 */ oid = "applicationProtocol.1"; break; case 12: /* mts-transfer-protocol */ oid = "applicationProtocol.12"; break; default: if(session && session->pres_ctx_id) oid = find_oid_by_pres_ctx_id(actx->pinfo, session->pres_ctx_id); break; } if(!oid) /* XXX: problem here is we haven't decoded the applicationProtocol yet - so we make assumptions! */ oid = "applicationProtocol.12"; if(oid) { if(session != NULL) session->ros_op = (ROS_OP_BIND | ROS_OP_ERROR); offset = call_rtse_oid_callback(oid, tvb, offset, actx->pinfo, top_tree ? top_tree : tree, session); } return offset; } static const ber_sequence_t RTORJapdu_set[] = { { &hf_rtse_refuseReason , BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_RefuseReason }, { &hf_rtse_userDataRJ , BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_rtse_T_userDataRJ }, { NULL, 0, 0, 0, NULL } }; int dissect_rtse_RTORJapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { col_append_str(actx->pinfo->cinfo, COL_INFO, "Refuse"); offset = dissect_ber_set(implicit_tag, actx, tree, tvb, offset, RTORJapdu_set, hf_index, ett_rtse_RTORJapdu); return offset; } static int dissect_rtse_RTTPapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { int priority = -1; col_append_str(actx->pinfo->cinfo, COL_INFO, "Turn-Please"); offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, &priority); if(priority != -1) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " (%d)", priority); return offset; } static int dissect_rtse_RTTRapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { tvbuff_t *next_tvb = NULL; struct SESSION_DATA_STRUCTURE* session = (struct SESSION_DATA_STRUCTURE*)actx->private_data; offset = dissect_ber_octet_string(false, actx, tree, tvb, offset, hf_index, &next_tvb); if(next_tvb) { /* XXX: we should check is this is an EXTERNAL first */ /* ROS won't do this for us */ if(session) session->ros_op = (ROS_OP_INVOKE | ROS_OP_ARGUMENT); offset = dissect_ber_external_type(false, tree, next_tvb, 0, actx, -1, call_rtse_external_type_callback); } return offset; } static const value_string rtse_AbortReason_vals[] = { { 0, "localSystemProblem" }, { 1, "invalidParameter" }, { 2, "unrecognizedActivity" }, { 3, "temporaryProblem" }, { 4, "protocolError" }, { 5, "permanentProblem" }, { 6, "userError" }, { 7, "transferCompleted" }, { 0, NULL } }; static int dissect_rtse_AbortReason(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { int reason = -1; offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, &reason); if(reason != -1) col_append_fstr(actx->pinfo->cinfo, COL_INFO, " (%s)", val_to_str(reason, rtse_AbortReason_vals, "reason(%d)")); return offset; } static int dissect_rtse_BIT_STRING(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_bitstring(implicit_tag, actx, tree, tvb, offset, NULL, 0, hf_index, -1, NULL); return offset; } static int dissect_rtse_T_userdataAB(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { /*XXX not implemented yet */ return offset; } static const ber_sequence_t RTABapdu_set[] = { { &hf_rtse_abortReason , BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_AbortReason }, { &hf_rtse_reflectedParameter, BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_rtse_BIT_STRING }, { &hf_rtse_userdataAB , BER_CLASS_CON, 2, BER_FLAGS_OPTIONAL, dissect_rtse_T_userdataAB }, { NULL, 0, 0, 0, NULL } }; int dissect_rtse_RTABapdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { col_append_str(actx->pinfo->cinfo, COL_INFO, "Abort"); offset = dissect_ber_set(implicit_tag, actx, tree, tvb, offset, RTABapdu_set, hf_index, ett_rtse_RTABapdu); return offset; } static const ber_choice_t RTSE_apdus_choice[] = { { 0, &hf_rtse_rtorq_apdu , BER_CLASS_CON, 16, BER_FLAGS_IMPLTAG, dissect_rtse_RTORQapdu }, { 1, &hf_rtse_rtoac_apdu , BER_CLASS_CON, 17, BER_FLAGS_IMPLTAG, dissect_rtse_RTOACapdu }, { 2, &hf_rtse_rtorj_apdu , BER_CLASS_CON, 18, BER_FLAGS_IMPLTAG, dissect_rtse_RTORJapdu }, { 3, &hf_rtse_rttp_apdu , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_rtse_RTTPapdu }, { 4, &hf_rtse_rttr_apdu , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_rtse_RTTRapdu }, { 5, &hf_rtse_rtab_apdu , BER_CLASS_CON, 22, BER_FLAGS_IMPLTAG, dissect_rtse_RTABapdu }, { 0, NULL, 0, 0, 0, NULL } }; static int dissect_rtse_RTSE_apdus(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_ber_choice(actx, tree, tvb, offset, RTSE_apdus_choice, hf_index, ett_rtse_RTSE_apdus, NULL); return offset; } /* * Dissect RTSE PDUs inside a PPDU. */ static int dissect_rtse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data) { int offset = 0; int old_offset; proto_item *item; proto_tree *tree; proto_tree *next_tree=NULL; tvbuff_t *next_tvb = NULL; tvbuff_t *data_tvb = NULL; fragment_head *frag_msg = NULL; uint32_t fragment_length; uint32_t rtse_id = 0; bool data_handled = false; struct SESSION_DATA_STRUCTURE* session; conversation_t *conversation = NULL; asn1_ctx_t asn1_ctx; asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo); /* do we have application context from the acse dissector? */ if (data == NULL) return 0; session = (struct SESSION_DATA_STRUCTURE*)data; /* save parent_tree so subdissectors can create new top nodes */ top_tree=parent_tree; asn1_ctx.private_data = session; col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTSE"); col_clear(pinfo->cinfo, COL_INFO); if (rtse_reassemble && ((session->spdu_type == SES_DATA_TRANSFER) || (session->spdu_type == SES_MAJOR_SYNC_POINT))) { /* Use conversation index as fragment id */ conversation = find_conversation_pinfo(pinfo, 0); if (conversation != NULL) { rtse_id = conversation->conv_index; } session->rtse_reassemble = true; } if (rtse_reassemble && session->spdu_type == SES_MAJOR_SYNC_POINT) { frag_msg = fragment_end_seq_next (&rtse_reassembly_table, pinfo, rtse_id, NULL); next_tvb = process_reassembled_data (tvb, offset, pinfo, "Reassembled RTSE", frag_msg, &rtse_frag_items, NULL, parent_tree); } item = proto_tree_add_item(parent_tree, proto_rtse, next_tvb ? next_tvb : tvb, 0, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_rtse); if (rtse_reassemble && session->spdu_type == SES_DATA_TRANSFER) { /* strip off the OCTET STRING encoding - including any CONSTRUCTED OCTET STRING */ dissect_ber_octet_string(false, &asn1_ctx, tree, tvb, offset, hf_rtse_segment_data, &data_tvb); if (data_tvb) { fragment_length = tvb_captured_length_remaining (data_tvb, 0); proto_item_append_text(asn1_ctx.created_item, " (%u byte%s)", fragment_length, plurality(fragment_length, "", "s")); frag_msg = fragment_add_seq_next (&rtse_reassembly_table, data_tvb, 0, pinfo, rtse_id, NULL, fragment_length, true); if (frag_msg && pinfo->num != frag_msg->reassembled_in) { /* Add a "Reassembled in" link if not reassembled in this frame */ proto_tree_add_uint (tree, *(rtse_frag_items.hf_reassembled_in), data_tvb, 0, 0, frag_msg->reassembled_in); } pinfo->fragmented = true; data_handled = true; } else { fragment_length = tvb_captured_length_remaining (tvb, offset); } col_append_fstr(pinfo->cinfo, COL_INFO, "[RTSE fragment, %u byte%s]", fragment_length, plurality(fragment_length, "", "s")); } else if (rtse_reassemble && session->spdu_type == SES_MAJOR_SYNC_POINT) { if (next_tvb) { /* ROS won't do this for us */ session->ros_op = (ROS_OP_INVOKE | ROS_OP_ARGUMENT); /*offset=*/dissect_ber_external_type(false, tree, next_tvb, 0, &asn1_ctx, -1, call_rtse_external_type_callback); top_tree = NULL; /* Return other than 0 to indicate that we handled this packet */ return 1; } else { offset = tvb_captured_length (tvb); } pinfo->fragmented = false; data_handled = true; } if (!data_handled) { while (tvb_reported_length_remaining(tvb, offset) > 0) { old_offset=offset; offset=dissect_rtse_RTSE_apdus(true, tvb, offset, &asn1_ctx, tree, -1); if (offset == old_offset) { next_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_rtse_unknown, &item, "Unknown RTSE PDU"); expert_add_info (pinfo, item, &ei_rtse_unknown_rtse_pdu); dissect_unknown_ber(pinfo, tvb, offset, next_tree); break; } } } top_tree = NULL; return tvb_captured_length(tvb); } /*--- proto_register_rtse -------------------------------------------*/ void proto_register_rtse(void) { /* List of fields */ static hf_register_info hf[] = { /* Fragment entries */ { &hf_rtse_segment_data, { "RTSE segment data", "rtse.segment", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_rtse_fragments, { "RTSE fragments", "rtse.fragments", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_rtse_fragment, { "RTSE fragment", "rtse.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_rtse_fragment_overlap, { "RTSE fragment overlap", "rtse.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_rtse_fragment_overlap_conflicts, { "RTSE fragment overlapping with conflicting data", "rtse.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_rtse_fragment_multiple_tails, { "RTSE has multiple tail fragments", "rtse.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_rtse_fragment_too_long_fragment, { "RTSE fragment too long", "rtse.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_rtse_fragment_error, { "RTSE defragmentation error", "rtse.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_rtse_fragment_count, { "RTSE fragment count", "rtse.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_rtse_reassembled_in, { "Reassembled RTSE in frame", "rtse.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, "This RTSE packet is reassembled in this frame", HFILL } }, { &hf_rtse_reassembled_length, { "Reassembled RTSE length", "rtse.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x00, "The total length of the reassembled payload", HFILL } }, { &hf_rtse_rtorq_apdu, { "rtorq-apdu", "rtse.rtorq_apdu_element", FT_NONE, BASE_NONE, NULL, 0, "RTORQapdu", HFILL }}, { &hf_rtse_rtoac_apdu, { "rtoac-apdu", "rtse.rtoac_apdu_element", FT_NONE, BASE_NONE, NULL, 0, "RTOACapdu", HFILL }}, { &hf_rtse_rtorj_apdu, { "rtorj-apdu", "rtse.rtorj_apdu_element", FT_NONE, BASE_NONE, NULL, 0, "RTORJapdu", HFILL }}, { &hf_rtse_rttp_apdu, { "rttp-apdu", "rtse.rttp_apdu", FT_INT32, BASE_DEC, NULL, 0, "RTTPapdu", HFILL }}, { &hf_rtse_rttr_apdu, { "rttr-apdu", "rtse.rttr_apdu", FT_BYTES, BASE_NONE, NULL, 0, "RTTRapdu", HFILL }}, { &hf_rtse_rtab_apdu, { "rtab-apdu", "rtse.rtab_apdu_element", FT_NONE, BASE_NONE, NULL, 0, "RTABapdu", HFILL }}, { &hf_rtse_checkpointSize, { "checkpointSize", "rtse.checkpointSize", FT_INT32, BASE_DEC, NULL, 0, "INTEGER", HFILL }}, { &hf_rtse_windowSize, { "windowSize", "rtse.windowSize", FT_INT32, BASE_DEC, NULL, 0, "INTEGER", HFILL }}, { &hf_rtse_dialogueMode, { "dialogueMode", "rtse.dialogueMode", FT_INT32, BASE_DEC, VALS(rtse_T_dialogueMode_vals), 0, NULL, HFILL }}, { &hf_rtse_connectionDataRQ, { "connectionDataRQ", "rtse.connectionDataRQ", FT_UINT32, BASE_DEC, VALS(rtse_ConnectionData_vals), 0, "ConnectionData", HFILL }}, { &hf_rtse_applicationProtocol, { "applicationProtocol", "rtse.applicationProtocol", FT_INT32, BASE_DEC, VALS(rtse_T_applicationProtocol_vals), 0, NULL, HFILL }}, { &hf_rtse_connectionDataAC, { "connectionDataAC", "rtse.connectionDataAC", FT_UINT32, BASE_DEC, VALS(rtse_ConnectionData_vals), 0, "ConnectionData", HFILL }}, { &hf_rtse_refuseReason, { "refuseReason", "rtse.refuseReason", FT_INT32, BASE_DEC, VALS(rtse_RefuseReason_vals), 0, NULL, HFILL }}, { &hf_rtse_userDataRJ, { "userDataRJ", "rtse.userDataRJ_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_abortReason, { "abortReason", "rtse.abortReason", FT_INT32, BASE_DEC, VALS(rtse_AbortReason_vals), 0, NULL, HFILL }}, { &hf_rtse_reflectedParameter, { "reflectedParameter", "rtse.reflectedParameter", FT_BYTES, BASE_NONE, NULL, 0, "BIT_STRING", HFILL }}, { &hf_rtse_userdataAB, { "userdataAB", "rtse.userdataAB_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_open, { "open", "rtse.open_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_recover, { "recover", "rtse.recover_element", FT_NONE, BASE_NONE, NULL, 0, "SessionConnectionIdentifier", HFILL }}, { &hf_rtse_callingSSuserReference, { "callingSSuserReference", "rtse.callingSSuserReference", FT_UINT32, BASE_DEC, VALS(rtse_CallingSSuserReference_vals), 0, NULL, HFILL }}, { &hf_rtse_commonReference, { "commonReference", "rtse.commonReference", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_additionalReferenceInformation, { "additionalReferenceInformation", "rtse.additionalReferenceInformation", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_t61String, { "t61String", "rtse.t61String", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_rtse_octetString, { "octetString", "rtse.octetString", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, }; /* List of subtrees */ static int *ett[] = { &ett_rtse, &ett_rtse_unknown, &ett_rtse_fragment, &ett_rtse_fragments, &ett_rtse_RTSE_apdus, &ett_rtse_RTORQapdu, &ett_rtse_RTOACapdu, &ett_rtse_RTORJapdu, &ett_rtse_RTABapdu, &ett_rtse_ConnectionData, &ett_rtse_SessionConnectionIdentifier, &ett_rtse_CallingSSuserReference, }; static ei_register_info ei[] = { { &ei_rtse_dissector_oid_not_implemented, { "rtse.dissector_oid_not_implemented", PI_UNDECODED, PI_WARN, "RTSE: Dissector for OID not implemented", EXPFILL }}, { &ei_rtse_unknown_rtse_pdu, { "rtse.unknown_rtse_pdu", PI_UNDECODED, PI_WARN, "Unknown RTSE PDU", EXPFILL }}, { &ei_rtse_abstract_syntax, { "rtse.bad_abstract_syntax", PI_PROTOCOL, PI_WARN, "Unable to determine abstract syntax for indirect reference", EXPFILL }}, }; expert_module_t* expert_rtse; module_t *rtse_module; /* Register protocol */ proto_rtse = proto_register_protocol(PNAME, PSNAME, PFNAME); rtse_handle = register_dissector("rtse", dissect_rtse, proto_rtse); /* Register fields and subtrees */ proto_register_field_array(proto_rtse, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_rtse = expert_register_protocol(proto_rtse); expert_register_field_array(expert_rtse, ei, array_length(ei)); reassembly_table_register (&rtse_reassembly_table, &addresses_reassembly_table_functions); rtse_module = prefs_register_protocol_subtree("OSI", proto_rtse, NULL); prefs_register_bool_preference(rtse_module, "reassemble", "Reassemble segmented RTSE datagrams", "Whether segmented RTSE datagrams should be reassembled." " To use this option, you must also enable" " \"Allow subdissectors to reassemble TCP streams\"" " in the TCP protocol settings.", &rtse_reassemble); rtse_oid_dissector_table = register_dissector_table("rtse.oid", "RTSE OID Dissectors", proto_rtse, FT_STRING, STRING_CASE_SENSITIVE); } /*--- proto_reg_handoff_rtse --- */ void proto_reg_handoff_rtse(void) { } /* * Editor modelines - https://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */