/* Do not modify this file. Changes will be overwritten. */ /* Generated automatically by the ASN.1 to Wireshark dissector compiler */ /* packet-cdt.c */ /* asn2wrs.py -b -q -L -p cdt -c ./cdt.cnf -s ./packet-cdt-template -D . -O ../.. cdt.asn */ /* packet-cdt.c * * Routines for Compressed Data Type packet dissection. * * Copyright 2005, Stig Bjorlykke , Thales Norway AS * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later * * Ref: STANAG 4406 Annex E */ #include "config.h" #include #include #include #include #include #include "packet-ber.h" #include "packet-p1.h" #include "packet-cdt.h" #define CDT_UNDEFINED 0 #define CDT_EXTERNAL 1 #define CDT_P1 2 #define CDT_P3 3 #define CDT_P7 4 #define PNAME "Compressed Data Type" #define PSNAME "CDT" #define PFNAME "cdt" void proto_register_cdt(void); void proto_reg_handoff_cdt(void); static proto_tree *top_tree; static proto_item *cdt_item; static uint32_t content_type; /* Initialize the protocol and registered fields */ static int proto_cdt; static int hf_cdt_CompressedData_PDU; /* CompressedData */ static int hf_cdt_compressionAlgorithm; /* CompressionAlgorithmIdentifier */ static int hf_cdt_compressedContentInfo; /* CompressedContentInfo */ static int hf_cdt_algorithmID_ShortForm; /* AlgorithmID_ShortForm */ static int hf_cdt_algorithmID_OID; /* OBJECT_IDENTIFIER */ static int hf_cdt_contentType; /* T_contentType */ static int hf_cdt_contentType_ShortForm; /* ContentType_ShortForm */ static int hf_cdt_contentType_OID; /* T_contentType_OID */ static int hf_cdt_compressedContent; /* CompressedContent */ /* Initialize the subtree pointers */ static int ett_cdt_CompressedData; static int ett_cdt_CompressionAlgorithmIdentifier; static int ett_cdt_CompressedContentInfo; static int ett_cdt_T_contentType; static expert_field ei_cdt_unable_compress_content; static expert_field ei_cdt_unable_uncompress_content; static const value_string cdt_AlgorithmID_ShortForm_vals[] = { { 0, "zlibCompress" }, { 0, NULL } }; static int dissect_cdt_AlgorithmID_ShortForm(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { uint32_t value; offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index, &value); proto_item_append_text (cdt_item, ", %s", val_to_str (value, cdt_AlgorithmID_ShortForm_vals, "unknown")); col_append_fstr (actx->pinfo->cinfo, COL_INFO, "%s ", val_to_str (value, cdt_AlgorithmID_ShortForm_vals, "unknown")); return offset; } static int dissect_cdt_OBJECT_IDENTIFIER(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_object_identifier(implicit_tag, actx, tree, tvb, offset, hf_index, NULL); return offset; } static const value_string cdt_CompressionAlgorithmIdentifier_vals[] = { { 0, "algorithmID-ShortForm" }, { 1, "algorithmID-OID" }, { 0, NULL } }; static const ber_choice_t CompressionAlgorithmIdentifier_choice[] = { { 0, &hf_cdt_algorithmID_ShortForm, BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_cdt_AlgorithmID_ShortForm }, { 1, &hf_cdt_algorithmID_OID , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_cdt_OBJECT_IDENTIFIER }, { 0, NULL, 0, 0, 0, NULL } }; static int dissect_cdt_CompressionAlgorithmIdentifier(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, CompressionAlgorithmIdentifier_choice, hf_index, ett_cdt_CompressionAlgorithmIdentifier, NULL); return offset; } static const value_string cdt_ContentType_ShortForm_vals[] = { { 0, "unidentified" }, { 1, "external" }, { 2, "p1" }, { 3, "p3" }, { 4, "p7" }, { 0, NULL } }; static int dissect_cdt_ContentType_ShortForm(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, &content_type); proto_item_append_text (cdt_item, ", %s", val_to_str (content_type, cdt_ContentType_ShortForm_vals, "unknown")); col_append_fstr (actx->pinfo->cinfo, COL_INFO, "%s ", val_to_str (content_type, cdt_ContentType_ShortForm_vals, "unknown")); return offset; } static int dissect_cdt_T_contentType_OID(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { const char *obj_id = NULL; offset = dissect_ber_object_identifier_str(implicit_tag, actx, tree, tvb, offset, hf_index, &obj_id); if (obj_id) { const char *name = oid_resolved_from_string (actx->pinfo->pool, obj_id); if (!name) { name = obj_id; } proto_item_append_text (cdt_item, ", %s", name); col_append_fstr (actx->pinfo->cinfo, COL_INFO, "%s ", name); } return offset; } static const value_string cdt_T_contentType_vals[] = { { 0, "contentType-ShortForm" }, { 1, "contentType-OID" }, { 0, NULL } }; static const ber_choice_t T_contentType_choice[] = { { 0, &hf_cdt_contentType_ShortForm, BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_cdt_ContentType_ShortForm }, { 1, &hf_cdt_contentType_OID , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_cdt_T_contentType_OID }, { 0, NULL, 0, 0, 0, NULL } }; static int dissect_cdt_T_contentType(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, T_contentType_choice, hf_index, ett_cdt_T_contentType, NULL); return offset; } static int dissect_cdt_CompressedContent(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, *compr_tvb = NULL; int save_offset = offset; offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &compr_tvb); if (compr_tvb == NULL) { proto_tree_add_expert(top_tree, actx->pinfo, &ei_cdt_unable_compress_content, tvb, save_offset, -1); col_append_str (actx->pinfo->cinfo, COL_INFO, "[Error: Unable to get compressed content]"); return offset; } next_tvb = tvb_child_uncompress_zlib(tvb, compr_tvb, 0, tvb_reported_length (compr_tvb)); if (next_tvb == NULL) { proto_tree_add_expert(top_tree, actx->pinfo, &ei_cdt_unable_uncompress_content, tvb, save_offset, -1); col_append_str (actx->pinfo->cinfo, COL_INFO, "[Error: Unable to uncompress content]"); return offset; } add_new_data_source (actx->pinfo, next_tvb, "Uncompressed Content"); switch (content_type) { case CDT_UNDEFINED: call_data_dissector(next_tvb, actx->pinfo, top_tree); break; case CDT_EXTERNAL: dissect_unknown_ber (actx->pinfo, next_tvb, 0, top_tree); break; case CDT_P1: dissect_p1_mts_apdu (next_tvb, actx->pinfo, top_tree, NULL); break; default: call_data_dissector(next_tvb, actx->pinfo, top_tree); break; } return offset; } static const ber_sequence_t CompressedContentInfo_sequence[] = { { &hf_cdt_contentType , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_cdt_T_contentType }, { &hf_cdt_compressedContent, BER_CLASS_CON, 0, 0, dissect_cdt_CompressedContent }, { NULL, 0, 0, 0, NULL } }; static int dissect_cdt_CompressedContentInfo(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_sequence(implicit_tag, actx, tree, tvb, offset, CompressedContentInfo_sequence, hf_index, ett_cdt_CompressedContentInfo); return offset; } static const ber_sequence_t CompressedData_sequence[] = { { &hf_cdt_compressionAlgorithm, BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_cdt_CompressionAlgorithmIdentifier }, { &hf_cdt_compressedContentInfo, BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_cdt_CompressedContentInfo }, { NULL, 0, 0, 0, NULL } }; int dissect_cdt_CompressedData(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { content_type = 0; offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset, CompressedData_sequence, hf_index, ett_cdt_CompressedData); return offset; } /*--- PDUs ---*/ static int dissect_CompressedData_PDU(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_) { int offset = 0; asn1_ctx_t asn1_ctx; asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo); offset = dissect_cdt_CompressedData(false, tvb, offset, &asn1_ctx, tree, hf_cdt_CompressedData_PDU); return offset; } /*--- proto_register_cdt -------------------------------------------*/ /* ** Dissect Compressed Data Type */ void dissect_cdt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree) { proto_tree *tree = NULL; /* save parent_tree so subdissectors can create new top nodes */ top_tree = parent_tree; if (parent_tree) { cdt_item = proto_tree_add_item (parent_tree, proto_cdt, tvb, 0, -1, ENC_NA); tree = proto_item_add_subtree (cdt_item, ett_cdt_CompressedData); } else { cdt_item = NULL; } col_set_str (pinfo->cinfo, COL_PROTOCOL, "CDT"); col_clear (pinfo->cinfo, COL_INFO); dissect_CompressedData_PDU (tvb, pinfo, tree, NULL); } void proto_register_cdt (void) { /* List of fields */ static hf_register_info hf[] = { { &hf_cdt_CompressedData_PDU, { "CompressedData", "cdt.CompressedData_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_cdt_compressionAlgorithm, { "compressionAlgorithm", "cdt.compressionAlgorithm", FT_UINT32, BASE_DEC, VALS(cdt_CompressionAlgorithmIdentifier_vals), 0, "CompressionAlgorithmIdentifier", HFILL }}, { &hf_cdt_compressedContentInfo, { "compressedContentInfo", "cdt.compressedContentInfo_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_cdt_algorithmID_ShortForm, { "algorithmID-ShortForm", "cdt.algorithmID_ShortForm", FT_INT32, BASE_DEC, VALS(cdt_AlgorithmID_ShortForm_vals), 0, NULL, HFILL }}, { &hf_cdt_algorithmID_OID, { "algorithmID-OID", "cdt.algorithmID_OID", FT_OID, BASE_NONE, NULL, 0, "OBJECT_IDENTIFIER", HFILL }}, { &hf_cdt_contentType, { "contentType", "cdt.contentType", FT_UINT32, BASE_DEC, VALS(cdt_T_contentType_vals), 0, NULL, HFILL }}, { &hf_cdt_contentType_ShortForm, { "contentType-ShortForm", "cdt.contentType_ShortForm", FT_INT32, BASE_DEC, VALS(cdt_ContentType_ShortForm_vals), 0, NULL, HFILL }}, { &hf_cdt_contentType_OID, { "contentType-OID", "cdt.contentType_OID", FT_OID, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_cdt_compressedContent, { "compressedContent", "cdt.compressedContent", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, }; /* List of subtrees */ static int *ett[] = { &ett_cdt_CompressedData, &ett_cdt_CompressionAlgorithmIdentifier, &ett_cdt_CompressedContentInfo, &ett_cdt_T_contentType, }; static ei_register_info ei[] = { { &ei_cdt_unable_compress_content, { "cdt.unable_compress_content", PI_UNDECODED, PI_ERROR, "Unable to get compressed content", EXPFILL }}, { &ei_cdt_unable_uncompress_content, { "cdt.unable_uncompress_content", PI_UNDECODED, PI_ERROR, "Unable to get uncompressed content", EXPFILL }}, }; expert_module_t* expert_cdt; /* Register protocol */ proto_cdt = proto_register_protocol (PNAME, PSNAME, PFNAME); /* Register fields and subtrees */ proto_register_field_array (proto_cdt, hf, array_length(hf)); proto_register_subtree_array (ett, array_length(ett)); expert_cdt = expert_register_protocol(proto_cdt); expert_register_field_array(expert_cdt, ei, array_length(ei)); } /*--- proto_reg_handoff_cdt ---------------------------------------*/ void proto_reg_handoff_cdt (void) { register_ber_oid_dissector("1.3.26.0.4406.0.4.2", dissect_CompressedData_PDU, proto_cdt, "cdt"); }