diff options
Diffstat (limited to 'epan/dissectors/packet-ascend.c')
| -rw-r--r-- | epan/dissectors/packet-ascend.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ascend.c b/epan/dissectors/packet-ascend.c new file mode 100644 index 00000000..ed683dd5 --- /dev/null +++ b/epan/dissectors/packet-ascend.c @@ -0,0 +1,197 @@ +/* packet-ascend.c + * Routines for decoding Lucent/Ascend packet traces + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> +#include <wiretap/wtap.h> + +void proto_register_ascend(void); +void proto_reg_handoff_ascend(void); + +static int proto_ascend = -1; +static int hf_link_type = -1; +static int hf_session_id = -1; +static int hf_called_number = -1; +static int hf_chunk = -1; +static int hf_task = -1; +static int hf_user_name = -1; + +static gint ett_raw = -1; + +static const value_string encaps_vals[] = { + {ASCEND_PFX_WDS_X, "PPP Transmit" }, + {ASCEND_PFX_WDS_R, "PPP Receive" }, + {ASCEND_PFX_WDD, "Ethernet triggering dialout"}, + {ASCEND_PFX_ISDN_X, "ISDN Transmit" }, + {ASCEND_PFX_ISDN_R, "ISDN Receive" }, + {ASCEND_PFX_ETHER, "Ethernet" }, + {0, NULL } +}; + +static dissector_handle_t ascend_handle; +static dissector_handle_t eth_withoutfcs_handle; +static dissector_handle_t ppp_hdlc_handle; +static dissector_handle_t lapd_phdr_handle; + +static int +dissect_ascend(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + proto_tree *fh_tree; + proto_item *ti, *hidden_item; + union wtap_pseudo_header *pseudo_header = pinfo->pseudo_header; + struct isdn_phdr isdn; + + /* load the top pane info. This should be overwritten by + the next protocol in the stack */ + col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A"); + col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A"); + col_set_str(pinfo->cinfo, COL_PROTOCOL, "N/A"); + col_set_str(pinfo->cinfo, COL_INFO, "Lucent/Ascend packet trace"); + + /* If this is a transmitted or received PPP frame, set the PPP direction. */ + switch (pseudo_header->ascend.type) { + + case ASCEND_PFX_WDS_X: + pinfo->p2p_dir = P2P_DIR_SENT; + break; + + case ASCEND_PFX_WDS_R: + pinfo->p2p_dir = P2P_DIR_RECV; + break; + } + + /* populate a tree in the second pane with the status of the link + layer (ie none) */ + if(tree) { + ti = proto_tree_add_protocol_format(tree, proto_ascend, tvb, 0, 0, + "Lucent/Ascend packet trace"); + fh_tree = proto_item_add_subtree(ti, ett_raw); + proto_tree_add_uint(fh_tree, hf_link_type, tvb, 0, 0, + pseudo_header->ascend.type); + switch (pseudo_header->ascend.type) { + + case ASCEND_PFX_WDD: + /* Ethernet packet forcing a call */ + proto_tree_add_string(fh_tree, hf_called_number, tvb, 0, 0, + pseudo_header->ascend.call_num); + proto_tree_add_uint(fh_tree, hf_chunk, tvb, 0, 0, + pseudo_header->ascend.chunk); + hidden_item = proto_tree_add_uint(fh_tree, hf_session_id, tvb, 0, 0, 0); + proto_item_set_hidden(hidden_item); + break; + + case ASCEND_PFX_WDS_X: + case ASCEND_PFX_WDS_R: + /* wandsession data */ + proto_tree_add_string(fh_tree, hf_user_name, tvb, 0, 0, + pseudo_header->ascend.user); + proto_tree_add_uint(fh_tree, hf_session_id, tvb, 0, 0, + pseudo_header->ascend.sess); + hidden_item = proto_tree_add_uint(fh_tree, hf_chunk, tvb, 0, 0, 0); + proto_item_set_hidden(hidden_item); + break; + + default: + break; + } + proto_tree_add_uint(fh_tree, hf_task, tvb, 0, 0, pseudo_header->ascend.task); + } + + switch (pseudo_header->ascend.type) { + case ASCEND_PFX_WDS_X: + case ASCEND_PFX_WDS_R: + call_dissector(ppp_hdlc_handle, tvb, pinfo, tree); + break; + case ASCEND_PFX_WDD: + case ASCEND_PFX_ETHER: + call_dissector(eth_withoutfcs_handle, tvb, pinfo, tree); + break; + case ASCEND_PFX_ISDN_X: + isdn.uton = TRUE; + isdn.channel = 0; + call_dissector_with_data(lapd_phdr_handle, tvb, pinfo, tree, &isdn); + break; + case ASCEND_PFX_ISDN_R: + isdn.uton = FALSE; + isdn.channel = 0; + call_dissector_with_data(lapd_phdr_handle, tvb, pinfo, tree, &isdn); + break; + default: + break; + } + return tvb_captured_length(tvb); +} + +void +proto_register_ascend(void) +{ + static hf_register_info hf[] = { + { &hf_link_type, + { "Link type", "ascend.type", FT_UINT32, BASE_DEC, VALS(encaps_vals), 0x0, + NULL, HFILL }}, + + { &hf_session_id, + { "Session ID", "ascend.sess", FT_UINT32, BASE_DEC, NULL, 0x0, + NULL, HFILL }}, + + { &hf_called_number, + { "Called number", "ascend.number", FT_STRING, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + + { &hf_chunk, + { "WDD Chunk", "ascend.chunk", FT_UINT32, BASE_HEX, NULL, 0x0, + NULL, HFILL }}, + + { &hf_task, + { "Task", "ascend.task", FT_UINT32, BASE_HEX, NULL, 0x0, + NULL, HFILL }}, + + { &hf_user_name, + { "User name", "ascend.user", FT_STRING, BASE_NONE, NULL, 0x0, + NULL, HFILL }}, + }; + static gint *ett[] = { + &ett_raw, + }; + + proto_ascend = proto_register_protocol("Lucent/Ascend debug output", + "Lucent/Ascend", "ascend"); + proto_register_field_array(proto_ascend, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + ascend_handle = register_dissector("ascend", dissect_ascend, proto_ascend); +} + +void +proto_reg_handoff_ascend(void) +{ + /* + * Get handles for the Ethernet, PPP-in-HDLC-like-framing, and + * LAPD-with-pseudoheader dissectors. + */ + eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_ascend); + ppp_hdlc_handle = find_dissector_add_dependency("ppp_hdlc", proto_ascend); + lapd_phdr_handle = find_dissector_add_dependency("lapd-phdr", proto_ascend); + + dissector_add_uint("wtap_encap", WTAP_ENCAP_ASCEND, ascend_handle); +} + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * 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: + */ |