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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
commit | e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch) | |
tree | 68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-cdt.c | |
parent | Initial commit. (diff) | |
download | wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip |
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-cdt.c')
-rw-r--r-- | epan/dissectors/packet-cdt.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/epan/dissectors/packet-cdt.c b/epan/dissectors/packet-cdt.c new file mode 100644 index 00000000..863bdd5b --- /dev/null +++ b/epan/dissectors/packet-cdt.c @@ -0,0 +1,396 @@ +/* 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 -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 <stig@bjorlykke.org>, Thales Norway AS + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + * + * Ref: STANAG 4406 Annex E + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/oids.h> +#include <epan/expert.h> +#include <epan/asn1.h> + +#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 = NULL; +static proto_item *cdt_item = NULL; + +static guint32 content_type = 0; + +/* Initialize the protocol and registered fields */ +static int proto_cdt = -1; +static int hf_cdt_CompressedData_PDU = -1; /* CompressedData */ +static int hf_cdt_compressionAlgorithm = -1; /* CompressionAlgorithmIdentifier */ +static int hf_cdt_compressedContentInfo = -1; /* CompressedContentInfo */ +static int hf_cdt_algorithmID_ShortForm = -1; /* AlgorithmID_ShortForm */ +static int hf_cdt_algorithmID_OID = -1; /* OBJECT_IDENTIFIER */ +static int hf_cdt_contentType = -1; /* T_contentType */ +static int hf_cdt_contentType_ShortForm = -1; /* ContentType_ShortForm */ +static int hf_cdt_contentType_OID = -1; /* T_contentType_OID */ +static int hf_cdt_compressedContent = -1; /* CompressedContent */ + +/* Initialize the subtree pointers */ +static gint ett_cdt_CompressedData = -1; +static gint ett_cdt_CompressionAlgorithmIdentifier = -1; +static gint ett_cdt_CompressedContentInfo = -1; +static gint ett_cdt_T_contentType = -1; + +static expert_field ei_cdt_unable_compress_content = EI_INIT; +static expert_field ei_cdt_unable_uncompress_content = EI_INIT; + + +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_) { + guint32 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 (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 gint *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"); + +} |