diff options
Diffstat (limited to 'epan/dissectors/packet-shicp.c')
| -rw-r--r-- | epan/dissectors/packet-shicp.c | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/epan/dissectors/packet-shicp.c b/epan/dissectors/packet-shicp.c new file mode 100644 index 0000000000..c22412c9d4 --- /dev/null +++ b/epan/dissectors/packet-shicp.c @@ -0,0 +1,634 @@ +/* packet-shicp.c + * Routines for Secure Host IP Configuration Protocol dissection + * Copyright 2021, Filip Kågesson <exfik@hms.se> + * + * 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 <epan/expert.h> +#include <epan/addr_resolv.h> +#include "packet-udp.h" + +void proto_reg_handoff_shicp(void); +void proto_register_shicp(void); + +/* Protocols and header fields */ +static int proto_shicp; +static int hf_shicp_header; +static int hf_shicp_protocol_version; +static int hf_shicp_dst; +static int hf_shicp_src; +static int hf_shicp_flags; +static int hf_shicp_msgclass_flag; +static int hf_shicp_error_flag; +static int hf_shicp_reserved_flag; +static int hf_shicp_msgtype; +static int hf_shicp_error; +static int hf_shicp_error_string; +static int hf_shicp_auth_req; +static int hf_shicp_module_version; +static int hf_shicp_module_desc; +static int hf_shicp_supported_msg; +static int hf_shicp_ip; +static int hf_shicp_sn; +static int hf_shicp_gw; +static int hf_shicp_dns1; +static int hf_shicp_dns2; +static int hf_shicp_dhcp; +static int hf_shicp_hn; +static int hf_shicp_hn_max_len; +static int hf_shicp_pswd_max_len; +static int hf_shicp_challenge; +static int hf_shicp_validity_period; +static int hf_shicp_token; +static int hf_shicp_pswd; +static int hf_shicp_wink_type; +static int hf_shicp_restart_mode; + +static gint ett_shicp; +static gint ett_shicp_flags; + +static expert_field ei_shicp_error; +static expert_field ei_shicp_malformed; + +#define SHICP_UDP_PORT 3250 + +#define SHICP_MIN_LENGTH 2 +#define SHICP_MAX_LENGTH 548 +#define SHICP_HEADER_SIZE 2 +#define SHICP_ADDRESS_SIZE 6 +#define SHICP_FLAGS_SIZE 1 +#define SHICP_MSG_TYPE_SIZE 1 +#define SHICP_ERROR_SIZE 1 +#define SHICP_CHALLENGE_SIZE 4 +#define SHICP_VALIDITY_PERIOD_SIZE 1 +#define SHICP_TOKEN_SIZE 36 +#define SHICP_WINK_TYPE_SIZE 1 +#define SHICP_RESTART_MODE_SIZE 1 +#define SHICP_FIXED_LEN 18 +#define SHICP_MSG_CLASS_FLAG 0x01 +#define SHICP_ERROR_FLAG 0x02 +#define SHICP_RESERVED_FLAG 0xFC + +/* Values of the supported message types. */ +#define SHICP_DISCOVER_MSG_TYPE 0x00 +#define SHICP_AUTH_CHALLENGE_MSG_TYPE 0x01 +#define SHICP_CONFIG_MSG_TYPE 0x02 +#define SHICP_WINK_MSG_TYPE 0x03 +#define SHICP_RESTART_MSG_TYPE 0x04 +#define SHICP_MASS_RESTART_MSG_TYPE 0x05 + +/* Keys of the parameters associated with discover messages. */ +#define SHICP_DISCOVER_AUTH_REQ_KEY 0x00 +#define SHICP_DISCOVER_MODULE_VERSION_KEY 0x01 +#define SHICP_DISCOVER_MODULE_DESC_KEY 0x02 +#define SHICP_DISCOVER_SUPPORTED_MSG_KEY 0x03 +#define SHICP_DISCOVER_IP_KEY 0x04 +#define SHICP_DISCOVER_SN_KEY 0x05 +#define SHICP_DISCOVER_GW_KEY 0x06 +#define SHICP_DISCOVER_DNS1_KEY 0x07 +#define SHICP_DISCOVER_DNS2_KEY 0x08 +#define SHICP_DISCOVER_DHCP_KEY 0x09 +#define SHICP_DISCOVER_HN_KEY 0x0A +#define SHICP_DISCOVER_HN_MAX_LEN_KEY 0x0B +#define SHICP_DISCOVER_PSWD_MAX_LEN_KEY 0x0C + +/* Keys of the parameters associated with configuration messages. */ +#define SHICP_CONFIG_IP_KEY 0x00 +#define SHICP_CONFIG_SN_KEY 0x01 +#define SHICP_CONFIG_GW_KEY 0x02 +#define SHICP_CONFIG_DNS1_KEY 0x03 +#define SHICP_CONFIG_DNS2_KEY 0x04 +#define SHICP_CONFIG_DHCP_KEY 0x05 +#define SHICP_CONFIG_HN_KEY 0x06 +#define SHICP_CONFIG_PSWD_KEY 0x07 + +/* The types of messages supported. */ +static const value_string message_types[] = { + {SHICP_DISCOVER_MSG_TYPE, "Discover"}, + {SHICP_AUTH_CHALLENGE_MSG_TYPE, "Authentication challenge"}, + {SHICP_CONFIG_MSG_TYPE, "Configuration"}, + {SHICP_WINK_MSG_TYPE, "Wink"}, + {SHICP_RESTART_MSG_TYPE, "Restart"}, + {SHICP_MASS_RESTART_MSG_TYPE, "Mass-restart"}, + {0, NULL} +}; +/* The error codes that are supported. */ +static const value_string error_types[] = { + {0x00, "Request was rejected"}, + {0x01, "Authentication failed"}, + {0x02, "Authentication required"}, + {0x03, "Unsupported message type"}, + {0x1F, "Hostname too long"}, + {0x20, "Password too long"}, + {0x21, "Bad config"}, + {0, NULL} +}; +/* The types of restart mode that are supported. */ +static const value_string restart_mode_types[] = { + {0x00, "Immediate restart"}, + {0x01, "Delayed restart"}, + {0, NULL} +}; + +static gboolean +test_shicp(packet_info* pinfo, tvbuff_t* tvb, int offset, void* data _U_) +{ + /* Check that the port matches the port used by SHICP. */ + if (pinfo->destport != SHICP_UDP_PORT) { + return FALSE; + } + + /* Check that the length of the message is within allowed boundaries. */ + if (tvb_reported_length(tvb) < SHICP_MIN_LENGTH || tvb_reported_length(tvb) > SHICP_MAX_LENGTH) { + return FALSE; + } + + /* Check that the header tag starts with 0xABC0. */ + if ((tvb_get_guint16(tvb, offset, ENC_LITTLE_ENDIAN) & 0xFFF8) != 0xABC0) { + return FALSE; + } + + return TRUE; +} + +static int +dissect_shicp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + void *data _U_) +{ + proto_item* ti; + proto_item* flags_pi; + proto_item* error_pi; + proto_tree* shicp_tree; + guint offset = 0; + guint payload_end; + guint keyvalue_key = 0; + guint keyvalue_length = 0; + guint keyvalue_offset = 0; + guint keyvalue_end = 0; + guint8 supported_message_value = 0; + guint16 payload_length = 0; + guint32 version = 0; + guint32 msgtype_value = 0; + guint32 error_value = 0; + guint64 flags_value = 0; + + wmem_strbuf_t* supported_messages = wmem_strbuf_new(pinfo->pool, ""); + wmem_strbuf_t* module_addr_strbuf = wmem_strbuf_new(pinfo->pool, ""); + + static int* flags[] = { + &hf_shicp_reserved_flag, + &hf_shicp_error_flag, + &hf_shicp_msgclass_flag, + NULL + }; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "SHICP"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_shicp, tvb, offset, -1, ENC_NA); + + shicp_tree = proto_item_add_subtree(ti, ett_shicp); + proto_item_append_text(ti, + ", Src:%s, Dst:%s", + address_with_resolution_to_str(pinfo->pool, &pinfo->dl_src), + address_with_resolution_to_str(pinfo->pool, &pinfo->dl_dst)); + proto_tree_add_item_ret_uint(shicp_tree, hf_shicp_header, tvb, offset, SHICP_HEADER_SIZE, ENC_LITTLE_ENDIAN, &version); + proto_tree_add_uint(shicp_tree, hf_shicp_protocol_version, tvb, offset, SHICP_HEADER_SIZE, version & 0x07); + offset += SHICP_HEADER_SIZE; + proto_tree_add_item(shicp_tree, hf_shicp_dst, tvb, offset, SHICP_ADDRESS_SIZE, ENC_NA); + gchar* dst = tvb_address_to_str(pinfo->pool, tvb, AT_ETHER, offset); + offset += SHICP_ADDRESS_SIZE; + proto_tree_add_item(shicp_tree, hf_shicp_src, tvb, offset, SHICP_ADDRESS_SIZE, ENC_NA); + gchar* src = tvb_address_to_str(pinfo->pool, tvb, AT_ETHER, offset); + offset += SHICP_ADDRESS_SIZE; + flags_pi = proto_tree_add_bitmask_ret_uint64(shicp_tree, tvb, offset, hf_shicp_flags, ett_shicp_flags, flags, ENC_LITTLE_ENDIAN, &flags_value); + offset += SHICP_FLAGS_SIZE; + proto_tree_add_item_ret_uint(shicp_tree, hf_shicp_msgtype, tvb, offset, SHICP_MSG_TYPE_SIZE, ENC_LITTLE_ENDIAN, &msgtype_value); + offset += SHICP_MSG_TYPE_SIZE; + payload_length = tvb_get_guint16(tvb, offset, ENC_LITTLE_ENDIAN); + offset += 1; + if (flags_value & SHICP_ERROR_FLAG) { + proto_item_set_text(flags_pi, + "Message flags: 0x%02x (%s, %s)", + (guint)flags_value, + tfs_get_string(flags_value & SHICP_MSG_CLASS_FLAG, &tfs_response_request), "Error"); + if (payload_length != 1) { + error_pi = proto_tree_add_string(shicp_tree, hf_shicp_error_string, tvb, offset, 0, "Malformed message"); + expert_add_info(pinfo, error_pi, &ei_shicp_malformed); + col_append_str(pinfo->cinfo, COL_INFO, "Error: Malformed message"); + } + else { + error_pi = proto_tree_add_item_ret_uint(shicp_tree, hf_shicp_error, tvb, offset, SHICP_ERROR_SIZE, ENC_LITTLE_ENDIAN, &error_value); + expert_add_info(pinfo, error_pi, &ei_shicp_error); + col_append_fstr(pinfo->cinfo, COL_INFO, "Error: %s", val_to_str(error_value, error_types, "%d")); + } + } + else { + proto_item_set_text(flags_pi, + "Message flags: 0x%02x (%s)", + (guint)flags_value, + tfs_get_string(flags_value & SHICP_MSG_CLASS_FLAG, &tfs_response_request)); + col_append_fstr(pinfo->cinfo, + COL_INFO, + "%s, Type: %s", + tfs_get_string(flags_value & SHICP_MSG_CLASS_FLAG, &tfs_response_request), + val_to_str(msgtype_value, message_types, "%d")); + payload_end = offset + payload_length; + switch (msgtype_value) + { + case SHICP_DISCOVER_MSG_TYPE: + while (offset < payload_end) { + keyvalue_key = tvb_get_guint8(tvb, offset); + offset += 1; + keyvalue_length = tvb_get_guint8(tvb, offset); + offset += 1; + switch (keyvalue_key) + { + case SHICP_DISCOVER_AUTH_REQ_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_auth_req, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_MODULE_VERSION_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_module_version, tvb, offset, keyvalue_length, ENC_ASCII | ENC_NA); + break; + case SHICP_DISCOVER_MODULE_DESC_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_module_desc, tvb, offset, keyvalue_length, ENC_ASCII | ENC_NA); + break; + case SHICP_DISCOVER_SUPPORTED_MSG_KEY: + keyvalue_end = offset + keyvalue_length; + keyvalue_offset = offset; + supported_message_value = tvb_get_guint8(tvb, keyvalue_offset); + wmem_strbuf_append(supported_messages, val_to_str(supported_message_value, message_types, "%d")); + keyvalue_offset += 1; + while (keyvalue_offset < keyvalue_end) { + supported_message_value = tvb_get_guint8(tvb, keyvalue_offset); + wmem_strbuf_append_printf(supported_messages, ", %s", val_to_str(supported_message_value, message_types, "%d")); + keyvalue_offset += 1; + } + proto_tree_add_string(shicp_tree, hf_shicp_supported_msg, tvb, offset, keyvalue_length, wmem_strbuf_get_str(supported_messages)); + break; + case SHICP_DISCOVER_IP_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_ip, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_SN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_sn, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_GW_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_gw, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_DNS1_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dns1, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_DNS2_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dns2, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_DHCP_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dhcp, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_HN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_hn, tvb, offset, keyvalue_length, ENC_ASCII | ENC_NA); + break; + case SHICP_DISCOVER_HN_MAX_LEN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_hn_max_len, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_DISCOVER_PSWD_MAX_LEN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_pswd_max_len, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + default: + break; + } + offset += keyvalue_length; + } + break; + case SHICP_AUTH_CHALLENGE_MSG_TYPE: + if (payload_length >= 5) { + proto_tree_add_item(shicp_tree, hf_shicp_challenge, tvb, offset, SHICP_CHALLENGE_SIZE, ENC_LITTLE_ENDIAN); + offset += SHICP_CHALLENGE_SIZE; + proto_tree_add_item(shicp_tree, hf_shicp_validity_period, tvb, offset, SHICP_VALIDITY_PERIOD_SIZE, ENC_LITTLE_ENDIAN); + } + break; + case SHICP_CONFIG_MSG_TYPE: + if (payload_length >= SHICP_TOKEN_SIZE) { + proto_tree_add_item(shicp_tree, hf_shicp_token, tvb, offset, SHICP_TOKEN_SIZE, ENC_NA); + offset += SHICP_TOKEN_SIZE; + } + else if (payload_length == SHICP_ERROR_SIZE) { + proto_tree_add_item(shicp_tree, hf_shicp_error, tvb, offset, SHICP_ERROR_SIZE, ENC_ASCII | ENC_NA); + break; + } + while (offset < payload_end) { + keyvalue_key = tvb_get_guint8(tvb, offset); + offset += 1; + keyvalue_length = tvb_get_guint8(tvb, offset); + offset += 1; + switch (keyvalue_key) + { + case SHICP_CONFIG_IP_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_ip, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_SN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_sn, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_GW_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_gw, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_DNS1_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dns1, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_DNS2_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dns2, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_DHCP_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_dhcp, tvb, offset, keyvalue_length, ENC_LITTLE_ENDIAN); + break; + case SHICP_CONFIG_HN_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_hn, tvb, offset, keyvalue_length, ENC_ASCII | ENC_NA); + break; + case SHICP_CONFIG_PSWD_KEY: + proto_tree_add_item(shicp_tree, hf_shicp_pswd, tvb, offset, keyvalue_length, ENC_ASCII | ENC_NA); + break; + default: + break; + } + offset += keyvalue_length; + } + break; + case SHICP_WINK_MSG_TYPE: + if (payload_length >= SHICP_TOKEN_SIZE + SHICP_WINK_TYPE_SIZE) { + proto_tree_add_item(shicp_tree, hf_shicp_token, tvb, offset, SHICP_TOKEN_SIZE, ENC_NA); + offset += SHICP_TOKEN_SIZE; + proto_tree_add_item(shicp_tree, hf_shicp_wink_type, tvb, offset, SHICP_WINK_TYPE_SIZE, ENC_LITTLE_ENDIAN); + } + break; + case SHICP_RESTART_MSG_TYPE: + if (payload_length >= SHICP_TOKEN_SIZE + SHICP_RESTART_MODE_SIZE) { + proto_tree_add_item(shicp_tree, hf_shicp_token, tvb, offset, SHICP_TOKEN_SIZE, ENC_NA); + offset += SHICP_TOKEN_SIZE; + proto_tree_add_item(shicp_tree, hf_shicp_restart_mode, tvb, offset, SHICP_RESTART_MODE_SIZE, ENC_LITTLE_ENDIAN); + } + break; + default: + break; + } + } + + wmem_strbuf_append(module_addr_strbuf, (flags_value & SHICP_MSG_CLASS_FLAG) ? src : dst); + if (strcmp(wmem_strbuf_get_str(module_addr_strbuf), "ff:ff:ff:ff:ff:ff") != 0) { + col_append_fstr(pinfo->cinfo, COL_INFO, ", Module MAC address: %s", wmem_strbuf_get_str(module_addr_strbuf)); + } + + return tvb_captured_length(tvb); +} + +static guint +get_shicp_len(packet_info* pinfo _U_, tvbuff_t* tvb, int offset _U_, void* data _U_) +{ + return (guint)tvb_reported_length(tvb); +} + +static gboolean +dissect_shicp_heur_udp(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data) +{ + return (udp_dissect_pdus(tvb, pinfo, tree, SHICP_FIXED_LEN, test_shicp, + get_shicp_len, dissect_shicp, data) != 0); +} + +void +proto_register_shicp(void) +{ + expert_module_t* expert_shicp; + + static hf_register_info hf[] = { + { &hf_shicp_header, + { "Header", "shicp.header", + FT_UINT16, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_protocol_version, + { "Protocol version", "shicp.protocolversion", + FT_UINT8, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_dst, + { "Destination", "shicp.dst", + FT_ETHER, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_src, + { "Source", "shicp.src", + FT_ETHER, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_flags, + { "Message flags", "shicp.flags", + FT_UINT8, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_reserved_flag, + { "Reserved", "shicp.flags.reserved", + FT_BOOLEAN, 8, + TFS(&tfs_set_notset), 0xFC, + NULL, HFILL } + }, + { &hf_shicp_error_flag, + { "Error", "shicp.flags.error", + FT_BOOLEAN, 8, + TFS(&tfs_set_notset), 0x02, + NULL, HFILL } + }, + { &hf_shicp_msgclass_flag, + { "Class", "shicp.flags.msgclass", + FT_BOOLEAN, 8, + TFS(&tfs_response_request), 0x01, + NULL, HFILL } + }, + { &hf_shicp_msgtype, + { "Message type", "shicp.msgtype", + FT_UINT8, BASE_HEX, + VALS(message_types), 0x0, + NULL, HFILL } + }, + { &hf_shicp_error, + { "Error", "shicp.error", + FT_UINT8, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_error_string, + { "Error", "shicp.error.string", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_auth_req, + { "Authentication required", "shicp.authreq", + FT_BOOLEAN, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_module_version, + { "Module version", "shicp.moduleversion", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_module_desc, + { "Module description", "shicp.moduledesc", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_supported_msg, + { "Supported messages", "shicp.supportedmsg", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_ip, + { "IP address", "shicp.ip", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_sn, + { "Subnet mask", "shicp.sn", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_gw, + { "Gateway address", "shicp.gw", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_dns1, + { "Primary DNS address", "shicp.dns1", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_dns2, + { "Secondary DNS address", "shicp.dns2", + FT_IPv4, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_dhcp, + { "DHCP", "shicp.dhcp", + FT_BOOLEAN, BASE_NONE, + TFS(&tfs_enabled_disabled), 0x0, + NULL, HFILL } + }, + { &hf_shicp_hn, + { "Hostname", "shicp.hn", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_hn_max_len, + { "Hostname max length", "shicp.hnmaxlen", + FT_UINT8, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_pswd_max_len, + { "Password max length", "shicp.pswdmaxlen", + FT_UINT8, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_challenge, + { "Challenge", "shicp.challenge", + FT_UINT32, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_validity_period, + { "Validity period (seconds)", "shicp.validityperiod", + FT_UINT8, BASE_DEC, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_token, + { "Authentication token", "shicp.token", + FT_BYTES, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_pswd, + { "Password", "shicp.pswd", + FT_STRINGZ, BASE_NONE, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_wink_type, + { "Wink type", "shicp.winktype", + FT_UINT8, BASE_HEX, + NULL, 0x0, + NULL, HFILL } + }, + { &hf_shicp_restart_mode, + { "Restart mode", "shicp.restartmode", + FT_UINT8, BASE_HEX, + VALS(restart_mode_types), 0x0, + NULL, HFILL } + } + }; + + static gint *ett[] = { + &ett_shicp, + &ett_shicp_flags + }; + + /* Setup protocol expert items */ + static ei_register_info ei[] = { + { &ei_shicp_error, + { "shicp.expert.error", PI_RESPONSE_CODE, PI_NOTE, + "Message contains an error code", EXPFILL } + }, + { &ei_shicp_malformed, + { "shicp.malformed", PI_MALFORMED, PI_WARN, + "Malformed message", EXPFILL } + } + }; + + proto_shicp = proto_register_protocol("Secure Host IP Configuration Protocol", "SHICP", "shicp"); + + proto_register_field_array(proto_shicp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + expert_shicp = expert_register_protocol(proto_shicp); + expert_register_field_array(expert_shicp, ei, array_length(ei)); +} + +void +proto_reg_handoff_shicp(void) +{ + heur_dissector_add("udp", dissect_shicp_heur_udp, "SHICP over UDP", "shicp_udp", proto_shicp, HEURISTIC_ENABLE); +} + +/* + * 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: + */ |