diff options
Diffstat (limited to 'epan/dissectors/packet-idp.c')
| -rw-r--r-- | epan/dissectors/packet-idp.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/epan/dissectors/packet-idp.c b/epan/dissectors/packet-idp.c new file mode 100644 index 00000000..0418e2b9 --- /dev/null +++ b/epan/dissectors/packet-idp.c @@ -0,0 +1,211 @@ +/* packet-idp.c + * Routines for XNS IDP + * Based on the Netware IPX dissector by Gilbert Ramirez <gram@alumni.rice.edu> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> +#include "packet-idp.h" +#include <epan/etypes.h> + +void proto_register_idp(void); +void proto_reg_handoff_idp(void); + +static dissector_handle_t idp_handle; + +static int proto_idp = -1; +static int hf_idp_checksum = -1; +static int hf_idp_len = -1; +/* static int hf_idp_src = -1; */ +/* static int hf_idp_dst = -1; */ +static int hf_idp_hops = -1; +static int hf_idp_packet_type = -1; +static int hf_idp_dnet = -1; +static int hf_idp_dnode = -1; +static int hf_idp_dsocket = -1; +static int hf_idp_snet = -1; +static int hf_idp_snode = -1; +static int hf_idp_ssocket = -1; + +static gint ett_idp = -1; + +static dissector_table_t idp_type_dissector_table; + +/* + * See + * + * "Internet Transport Protocols", XSIS 028112, December 1981 + * + * if you can find it; this is based on the headers in the BSD XNS + * implementation. + */ + +#define IDP_HEADER_LEN 30 /* It's *always* 30 bytes */ + +static const value_string idp_packet_type_vals[] = { + { IDP_PACKET_TYPE_RIP, "RIP" }, + { IDP_PACKET_TYPE_ECHO, "Echo" }, + { IDP_PACKET_TYPE_ERROR, "Error" }, + { IDP_PACKET_TYPE_PEP, "PEP" }, + { IDP_PACKET_TYPE_SPP, "SPP" }, + { 0, NULL } +}; + +static const value_string idp_socket_vals[] = { + { IDP_SOCKET_SMB, "SMB" }, + { 0, NULL } +}; + +static int +dissect_idp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + proto_tree *idp_tree; + proto_item *ti; + guint16 length; + guint8 type; + tvbuff_t *next_tvb; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "IDP"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_idp, tvb, 0, IDP_HEADER_LEN, ENC_NA); + idp_tree = proto_item_add_subtree(ti, ett_idp); + + proto_tree_add_checksum(idp_tree, tvb, 0, hf_idp_checksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS); + length = tvb_get_ntohs(tvb, 2); + proto_tree_add_uint(idp_tree, hf_idp_len, tvb, 2, 2, length); + /* Adjust the tvbuff length to include only the IDP datagram. */ + set_actual_length(tvb, length); + proto_tree_add_item(idp_tree, hf_idp_hops, tvb, 4, 1, ENC_BIG_ENDIAN); + type = tvb_get_guint8(tvb, 5); + proto_tree_add_uint(idp_tree, hf_idp_packet_type, tvb, 5, 1, type); + + pinfo->ptype = PT_IDP; + + /* Destination */ + proto_tree_add_item(idp_tree, hf_idp_dnet, tvb, 6, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(idp_tree, hf_idp_dnode, tvb, 10, 6, ENC_NA); + pinfo->destport = tvb_get_ntohs(tvb, 16); + proto_tree_add_uint(idp_tree, hf_idp_dsocket, tvb, 16, 2, + pinfo->destport); + + /* Source */ + proto_tree_add_item(idp_tree, hf_idp_snet, tvb, 18, 4, ENC_BIG_ENDIAN); + proto_tree_add_item(idp_tree, hf_idp_snode, tvb, 22, 6, ENC_NA); + pinfo->srcport = tvb_get_ntohs(tvb, 28); + proto_tree_add_uint(idp_tree, hf_idp_ssocket, tvb, 28, 2, + pinfo->srcport); + + /* Make the next tvbuff */ + next_tvb = tvb_new_subset_remaining(tvb, IDP_HEADER_LEN); + + /* + * Hand off to the dissector for the packet type. + */ + if (!dissector_try_uint(idp_type_dissector_table, type, next_tvb, + pinfo, tree)) + { + call_data_dissector(next_tvb, pinfo, tree); + } + return tvb_captured_length(tvb); +} + +void +proto_register_idp(void) +{ + static hf_register_info hf_idp[] = { + { &hf_idp_checksum, + { "Checksum", "idp.checksum", FT_UINT16, BASE_HEX, + NULL, 0x0, NULL, HFILL }}, + +#if 0 + { &hf_idp_src, + { "Source Address", "idp.src", FT_STRING, BASE_NONE, + NULL, 0x0, NULL, HFILL }}, +#endif + +#if 0 + { &hf_idp_dst, + { "Destination Address", "idp.dst", FT_STRING, BASE_NONE, + NULL, 0x0, NULL, HFILL }}, +#endif + + { &hf_idp_len, + { "Length", "idp.len", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, + &units_byte_bytes, 0x0, NULL, HFILL }}, + + /* XXX - does this have separate hop count and time subfields? */ + { &hf_idp_hops, + { "Transport Control (Hops)", "idp.hops", FT_UINT8, BASE_DEC, + NULL, 0x0, NULL, HFILL }}, + + { &hf_idp_packet_type, + { "Packet Type", "idp.packet_type", FT_UINT8, BASE_DEC, + VALS(idp_packet_type_vals), 0x0, NULL, HFILL }}, + + { &hf_idp_dnet, + { "Destination Network","idp.dst.net", FT_UINT32, BASE_HEX, + NULL, 0x0, NULL, HFILL }}, + + { &hf_idp_dnode, + { "Destination Node", "idp.dst.node", FT_ETHER, BASE_NONE, + NULL, 0x0, NULL, HFILL }}, + + { &hf_idp_dsocket, + { "Destination Socket", "idp.dst.socket", FT_UINT16, BASE_HEX, + VALS(idp_socket_vals), 0x0, NULL, HFILL }}, + + { &hf_idp_snet, + { "Source Network","idp.src.net", FT_UINT32, BASE_HEX, + NULL, 0x0, NULL, HFILL }}, + + { &hf_idp_snode, + { "Source Node", "idp.src.node", FT_ETHER, BASE_NONE, + NULL, 0x0, NULL, HFILL }}, + + { &hf_idp_ssocket, + { "Source Socket", "idp.src.socket", FT_UINT16, BASE_HEX, + VALS(idp_socket_vals), 0x0, NULL, HFILL }}, + }; + + static gint *ett[] = { + &ett_idp, + }; + + proto_idp = proto_register_protocol("Internetwork Datagram Protocol", + "IDP", "idp"); + proto_register_field_array(proto_idp, hf_idp, array_length(hf_idp)); + proto_register_subtree_array(ett, array_length(ett)); + + idp_type_dissector_table = register_dissector_table("idp.packet_type", + "IDP packet type", proto_idp, FT_UINT8, BASE_DEC); + + idp_handle = register_dissector("idp", dissect_idp, proto_idp); +} + +void +proto_reg_handoff_idp(void) +{ + dissector_add_uint("ethertype", ETHERTYPE_XNS_IDP, idp_handle); + dissector_add_uint("chdlc.protocol", ETHERTYPE_XNS_IDP, idp_handle); +} + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * Local variables: + * c-basic-offset: 8 + * tab-width: 8 + * indent-tabs-mode: t + * End: + * + * vi: set shiftwidth=8 tabstop=8 noexpandtab: + * :indentSize=8:tabSize=8:noTabs=false: + */ |