diff options
Diffstat (limited to 'plugins/epan/irda/packet-ircomm.c')
| -rw-r--r-- | plugins/epan/irda/packet-ircomm.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/plugins/epan/irda/packet-ircomm.c b/plugins/epan/irda/packet-ircomm.c new file mode 100644 index 0000000..0f46c33 --- /dev/null +++ b/plugins/epan/irda/packet-ircomm.c @@ -0,0 +1,428 @@ +/* packet-ircomm.c + * Routines for IrCOMM dissection + * Copyright 2003 Jan Kiszka <jan.kiszka@web.de> + * + * 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> + +/* + * See + * + * http://www.irdajp.info/specifications.php + * + * or + * + * https://web.archive.org/web/20040405053146/http://www.irda.org/standards/specifications.asp + * + * for various IrDA specifications. + */ + +#include "irda-appl.h" + + +/* Parameters common to all service types */ +#define IRCOMM_SERVICE_TYPE 0x00 +#define IRCOMM_PORT_TYPE 0x01 /* Only used in LM-IAS */ +#define IRCOMM_PORT_NAME 0x02 /* Only used in LM-IAS */ + +/* Parameters for both 3 wire and 9 wire */ +#define IRCOMM_DATA_RATE 0x10 +#define IRCOMM_DATA_FORMAT 0x11 +#define IRCOMM_FLOW_CONTROL 0x12 +#define IRCOMM_XON_XOFF 0x13 +#define IRCOMM_ENQ_ACK 0x14 +#define IRCOMM_LINE_STATUS 0x15 +#define IRCOMM_BREAK 0x16 + +/* Parameters for 9 wire */ +#define IRCOMM_DTE 0x20 +#define IRCOMM_DCE 0x21 +#define IRCOMM_POLL 0x22 + +/* Service type (details) */ +#define IRCOMM_3_WIRE_RAW 0x01 +#define IRCOMM_3_WIRE 0x02 +#define IRCOMM_9_WIRE 0x04 +#define IRCOMM_CENTRONICS 0x08 + +/* Port type (details) */ +#define IRCOMM_SERIAL 0x01 +#define IRCOMM_PARALLEL 0x02 + +/* Data format (details) */ +#define IRCOMM_WSIZE_5 0x00 +#define IRCOMM_WSIZE_6 0x01 +#define IRCOMM_WSIZE_7 0x02 +#define IRCOMM_WSIZE_8 0x03 + +#define IRCOMM_1_STOP_BIT 0x00 +#define IRCOMM_2_STOP_BIT 0x04 /* 1.5 if char len 5 */ + +#define IRCOMM_PARITY_DISABLE 0x00 +#define IRCOMM_PARITY_ENABLE 0x08 + +#define IRCOMM_PARITY_ODD 0x00 +#define IRCOMM_PARITY_EVEN 0x10 +#define IRCOMM_PARITY_MARK 0x20 +#define IRCOMM_PARITY_SPACE 0x30 + +/* Flow control */ +#define IRCOMM_XON_XOFF_IN 0x01 +#define IRCOMM_XON_XOFF_OUT 0x02 +#define IRCOMM_RTS_CTS_IN 0x04 +#define IRCOMM_RTS_CTS_OUT 0x08 +#define IRCOMM_DSR_DTR_IN 0x10 +#define IRCOMM_DSR_DTR_OUT 0x20 +#define IRCOMM_ENQ_ACK_IN 0x40 +#define IRCOMM_ENQ_ACK_OUT 0x80 + +/* Line status */ +#define IRCOMM_OVERRUN_ERROR 0x02 +#define IRCOMM_PARITY_ERROR 0x04 +#define IRCOMM_FRAMING_ERROR 0x08 + +/* DTE (Data terminal equipment) line settings */ +#define IRCOMM_DELTA_DTR 0x01 +#define IRCOMM_DELTA_RTS 0x02 +#define IRCOMM_DTR 0x04 +#define IRCOMM_RTS 0x08 + +/* DCE (Data communications equipment) line settings */ +#define IRCOMM_DELTA_CTS 0x01 /* Clear to send has changed */ +#define IRCOMM_DELTA_DSR 0x02 /* Data set ready has changed */ +#define IRCOMM_DELTA_RI 0x04 /* Ring indicator has changed */ +#define IRCOMM_DELTA_CD 0x08 /* Carrier detect has changed */ +#define IRCOMM_CTS 0x10 /* Clear to send is high */ +#define IRCOMM_DSR 0x20 /* Data set ready is high */ +#define IRCOMM_RI 0x40 /* Ring indicator is high */ +#define IRCOMM_CD 0x80 /* Carrier detect is high */ +#define IRCOMM_DCE_DELTA_ANY 0x0f + +void proto_reg_handoff_ircomm(void); + +/* Initialize the subtree pointers */ +static gint ett_ircomm = -1; +static gint ett_ircomm_ctrl = -1; + +#define MAX_PARAMETERS 32 +static gint ett_param[MAX_IAP_ENTRIES * MAX_PARAMETERS]; + +static dissector_handle_t ircomm_raw_handle; +static dissector_handle_t ircomm_cooked_handle; + +static int proto_ircomm = -1; +static int hf_ircomm_param = -1; +/* static int hf_param_pi = -1; */ +/* static int hf_param_pl = -1; */ +/* static int hf_param_pv = -1; */ +static int hf_control = -1; +static int hf_control_len = -1; + +static gboolean dissect_ircomm_parameters(tvbuff_t* tvb, guint offset, packet_info* pinfo, + proto_tree* tree, guint list_index, guint8 attr_type, guint8 circuit_id); +static gboolean dissect_ircomm_ttp_lsap(tvbuff_t* tvb, guint offset, packet_info* pinfo, + proto_tree* tree, guint list_index, guint8 attr_type, guint8 circuit_id); +static gboolean dissect_ircomm_lmp_lsap(tvbuff_t* tvb, guint offset, packet_info* pinfo, + proto_tree* tree, guint list_index, guint8 attr_type, guint8 circuit_id); + +ias_attr_dissector_t ircomm_attr_dissector[] = { +/* IrDA:IrCOMM attribute dissectors */ + { "Parameters", dissect_ircomm_parameters }, + { "IrDA:TinyTP:LsapSel", dissect_ircomm_ttp_lsap }, + { NULL, NULL } +}; + +ias_attr_dissector_t irlpt_attr_dissector[] = { +/* IrLPT attribute dissectors */ + { "IrDA:IrLMP:LsapSel", dissect_ircomm_lmp_lsap }, + { "IrDA:IrLMP:LSAPSel", dissect_ircomm_lmp_lsap }, /* according to IrCOMM V1.0, p25 */ + { NULL, NULL } +}; + + +/* + * Dissect the cooked IrCOMM protocol + */ +static int dissect_cooked_ircomm(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) +{ + proto_item *ti; + proto_tree *ircomm_tree, *ctrl_tree; + guint offset = 0; + guint clen; + gint len = tvb_reported_length(tvb); + + if (len == 0) + return len; + + /* Make entries in Protocol column on summary display */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "IrCOMM"); + + clen = tvb_get_guint8(tvb, offset); + len -= 1 + clen; + + if (len > 0) + col_add_fstr(pinfo->cinfo, COL_INFO, "Clen=%d, UserData: %d byte%s", clen, len, (len > 1)? "s": ""); + else + col_add_fstr(pinfo->cinfo, COL_INFO, "Clen=%d", clen); + + /* create display subtree for the protocol */ + ti = proto_tree_add_item(tree, proto_ircomm, tvb, 0, -1, ENC_NA); + ircomm_tree = proto_item_add_subtree(ti, ett_ircomm); + + ti = proto_tree_add_item(ircomm_tree, hf_control, tvb, 0, clen + 1, ENC_NA); + ctrl_tree = proto_item_add_subtree(ti, ett_ircomm_ctrl); + proto_tree_add_item(ctrl_tree, hf_control_len, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + call_data_dissector(tvb_new_subset_length(tvb, offset, clen), pinfo, ctrl_tree); + offset += clen; + + call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, ircomm_tree); + + return len; +} + + +/* + * Dissect the raw IrCOMM/IrLPT protocol + */ +static int dissect_raw_ircomm(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) +{ + guint len = tvb_reported_length(tvb); + proto_item* ti; + proto_tree* ircomm_tree; + + if (len == 0) + return 0; + + /* Make entries in Protocol column on summary display */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "IrCOMM"); + + col_add_fstr(pinfo->cinfo, COL_INFO, "User Data: %d byte%s", len, (len > 1)? "s": ""); + + /* create display subtree for the protocol */ + ti = proto_tree_add_item(tree, proto_ircomm, tvb, 0, -1, ENC_NA); + ircomm_tree = proto_item_add_subtree(ti, ett_ircomm); + + call_data_dissector(tvb, pinfo, ircomm_tree); + + return len; +} + + +/* + * Dissect IrCOMM IAS "Parameters" attribute + */ +static gboolean dissect_ircomm_parameters(tvbuff_t* tvb, guint offset, packet_info* pinfo _U_, + proto_tree* tree, guint list_index, guint8 attr_type, guint8 circuit_id _U_) +{ + guint len; + guint n = 0; + proto_item* ti; + proto_tree* p_tree; + char buf[256]; + guint8 pv; + + + if (!check_iap_octet_result(tvb, tree, offset, "Parameters", attr_type)) + return TRUE; + + if (tree) + { + len = tvb_get_ntohs(tvb, offset) + offset + 2; + offset += 2; + + while (offset < len) + { + guint8 p_len = tvb_get_guint8(tvb, offset + 1); + + + ti = proto_tree_add_item(tree, hf_ircomm_param, tvb, offset, p_len + 2, ENC_NA); + p_tree = proto_item_add_subtree(ti, ett_param[list_index * MAX_PARAMETERS + n]); + + buf[0] = 0; + + switch (tvb_get_guint8(tvb, offset)) + { + case IRCOMM_SERVICE_TYPE: + proto_item_append_text(ti, ": Service Type ("); + + pv = tvb_get_guint8(tvb, offset+2); + if (pv & IRCOMM_3_WIRE_RAW) + (void) g_strlcat(buf, ", 3-Wire raw", 256); + if (pv & IRCOMM_3_WIRE) + (void) g_strlcat(buf, ", 3-Wire", 256); + if (pv & IRCOMM_9_WIRE) + (void) g_strlcat(buf, ", 9-Wire", 256); + if (pv & IRCOMM_CENTRONICS) + (void) g_strlcat(buf, ", Centronics", 256); + + (void) g_strlcat(buf, ")", 256); + + if (strlen(buf) > 2) + proto_item_append_text(ti, "%s", buf+2); + else + proto_item_append_text(ti, "unknown)"); + + break; + + case IRCOMM_PORT_TYPE: + proto_item_append_text(ti, ": Port Type ("); + + pv = tvb_get_guint8(tvb, offset+2); + if (pv & IRCOMM_SERIAL) + (void) g_strlcat(buf, ", serial", 256); + if (pv & IRCOMM_PARALLEL) + (void) g_strlcat(buf, ", parallel", 256); + + (void) g_strlcat(buf, ")", 256); + + if (strlen(buf) > 2) + proto_item_append_text(ti, "%s", buf+2); + else + proto_item_append_text(ti, "unknown)"); + + break; + + case IRCOMM_PORT_NAME: + /* XXX - the IrCOMM V1.0 spec says this "Normally + human readable text, but not required". */ + proto_item_append_text(ti, ": Port Name (\"%s\")", + tvb_format_text(pinfo->pool, tvb, offset+2, p_len)); + + break; + + default: + proto_item_append_text(ti, ": unknown"); + } + + offset = dissect_param_tuple(tvb, p_tree, offset); + n++; + } + + } + + return TRUE; +} + + +/* + * Dissect IrCOMM IAS "IrDA:TinyTP:LsapSel" attribute + */ +static gboolean dissect_ircomm_ttp_lsap(tvbuff_t* tvb, guint offset, packet_info* pinfo, + proto_tree* tree, guint list_index _U_, guint8 attr_type, guint8 circuit_id) +{ + guint8 dlsap; + + + if ((dlsap = check_iap_lsap_result(tvb, tree, offset, "IrDA:TinyTP:LsapSel", attr_type)) == 0) + return FALSE; + + add_lmp_conversation(pinfo, dlsap, TRUE, ircomm_cooked_handle, circuit_id); + + return FALSE; +} + + +/* + * Dissect IrCOMM/IrLPT IAS "IrDA:IrLMP:LsapSel" attribute + */ +static gboolean dissect_ircomm_lmp_lsap(tvbuff_t* tvb, guint offset, packet_info* pinfo, + proto_tree* tree, guint list_index _U_, guint8 attr_type, guint8 circuit_id) +{ + guint8 dlsap; + + + if ((dlsap = check_iap_lsap_result(tvb, tree, offset, "IrDA:IrLMP:LsapSel", attr_type)) == 0) + return FALSE; + + add_lmp_conversation(pinfo, dlsap, FALSE, ircomm_raw_handle, circuit_id); + + return FALSE; +} + + +/* + * Register the IrCOMM protocol + */ +void proto_register_ircomm(void) +{ + guint i; + + /* Setup list of header fields */ + static hf_register_info hf_ircomm[] = { + { &hf_ircomm_param, + { "IrCOMM Parameter", "ircomm.parameter", + FT_NONE, BASE_NONE, NULL, 0, + NULL, HFILL }}, +#if 0 + { &hf_param_pi, + { "Parameter Identifier", "ircomm.pi", + FT_UINT8, BASE_HEX, NULL, 0, + NULL, HFILL }}, + { &hf_param_pl, + { "Parameter Length", "ircomm.pl", + FT_UINT8, BASE_HEX, NULL, 0, + NULL, HFILL }}, + { &hf_param_pv, + { "Parameter Value", "ircomm.pv", + FT_BYTES, BASE_NONE, NULL, 0, + NULL, HFILL }}, +#endif + { &hf_control, + { "Control Channel", "ircomm.control", + FT_NONE, BASE_NONE, NULL, 0, + NULL, HFILL }}, + { &hf_control_len, + { "Clen", "ircomm.control.len", + FT_UINT8, BASE_DEC, NULL, 0, + NULL, HFILL }} + }; + + /* Setup protocol subtree arrays */ + static gint* ett[] = { + &ett_ircomm, + &ett_ircomm_ctrl + }; + + gint* ett_p[MAX_IAP_ENTRIES * MAX_PARAMETERS]; + + + /* Register protocol names and descriptions */ + proto_ircomm = proto_register_protocol("IrCOMM Protocol", "IrCOMM", "ircomm"); + ircomm_raw_handle = register_dissector("ircomm_raw", dissect_raw_ircomm, proto_ircomm); + ircomm_cooked_handle = register_dissector("ircomm_cooked", dissect_cooked_ircomm, proto_ircomm); + + /* Required function calls to register the header fields */ + proto_register_field_array(proto_ircomm, hf_ircomm, array_length(hf_ircomm)); + + /* Register subtrees */ + proto_register_subtree_array(ett, array_length(ett)); + for (i = 0; i < MAX_IAP_ENTRIES * MAX_PARAMETERS; i++) + { + ett_param[i] = -1; + ett_p[i] = &ett_param[i]; + } + proto_register_subtree_array(ett_p, MAX_IAP_ENTRIES * MAX_PARAMETERS); +} + +/* + * 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: + */ |