/* * Copyright (C) 2005-2006 Martin Willi * Copyright (C) 2005 Jan Hutter * Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. */ #include #include "vendor_id_payload.h" typedef struct private_vendor_id_payload_t private_vendor_id_payload_t; /** * Private data of an vendor_id_payload_t object. * */ struct private_vendor_id_payload_t { /** * Public vendor_id_payload_t interface. */ vendor_id_payload_t public; /** * Next payload type. */ u_int8_t next_payload; /** * Critical flag. */ bool critical; /** * Length of this payload. */ u_int16_t payload_length; /** * The contained vendor_id data value. */ chunk_t vendor_id_data; }; /** * Encoding rules to parse or generate a VENDOR ID payload * * The defined offsets are the positions in a object of type * private_vendor_id_payload_t. * */ encoding_rule_t vendor_id_payload_encodings[] = { /* 1 Byte next payload type, stored in the field next_payload */ { U_INT_8, offsetof(private_vendor_id_payload_t, next_payload) }, /* the critical bit */ { FLAG, offsetof(private_vendor_id_payload_t, critical) }, /* 7 Bit reserved bits, nowhere stored */ { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, { RESERVED_BIT, 0 }, /* Length of the whole payload*/ { PAYLOAD_LENGTH, offsetof(private_vendor_id_payload_t, payload_length)}, /* some vendor_id data bytes, length is defined in PAYLOAD_LENGTH */ { VID_DATA, offsetof(private_vendor_id_payload_t, vendor_id_data) } }; /* 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ! Next Payload !C! RESERVED ! Payload Length ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! ~ VID Data ~ ! ! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /** * Implementation of payload_t.verify. */ static status_t verify(private_vendor_id_payload_t *this) { return SUCCESS; } /** * Implementation of vendor_id_payload_t.get_encoding_rules. */ static void get_encoding_rules(private_vendor_id_payload_t *this, encoding_rule_t **rules, size_t *rule_count) { *rules = vendor_id_payload_encodings; *rule_count = sizeof(vendor_id_payload_encodings) / sizeof(encoding_rule_t); } /** * Implementation of payload_t.get_type. */ static payload_type_t get_payload_type(private_vendor_id_payload_t *this) { return VENDOR_ID; } /** * Implementation of payload_t.get_next_type. */ static payload_type_t get_next_type(private_vendor_id_payload_t *this) { return (this->next_payload); } /** * Implementation of payload_t.set_next_type. */ static void set_next_type(private_vendor_id_payload_t *this,payload_type_t type) { this->next_payload = type; } /** * Implementation of payload_t.get_length. */ static size_t get_length(private_vendor_id_payload_t *this) { return this->payload_length; } /** * Implementation of vendor_id_payload_t.set_data. */ static void set_data (private_vendor_id_payload_t *this, chunk_t data) { if (this->vendor_id_data.ptr != NULL) { chunk_free(&(this->vendor_id_data)); } this->vendor_id_data.ptr = clalloc(data.ptr,data.len); this->vendor_id_data.len = data.len; this->payload_length = VENDOR_ID_PAYLOAD_HEADER_LENGTH + this->vendor_id_data.len; } /** * Implementation of vendor_id_payload_t.get_data. */ static chunk_t get_data (private_vendor_id_payload_t *this) { return (this->vendor_id_data); } /** * Implementation of vendor_id_payload_t.get_data_clone. */ static chunk_t get_data_clone (private_vendor_id_payload_t *this) { chunk_t cloned_data; if (this->vendor_id_data.ptr == NULL) { return (this->vendor_id_data); } cloned_data.ptr = clalloc(this->vendor_id_data.ptr,this->vendor_id_data.len); cloned_data.len = this->vendor_id_data.len; return cloned_data; } /** * Implementation of payload_t.destroy and vendor_id_payload_t.destroy. */ static void destroy(private_vendor_id_payload_t *this) { if (this->vendor_id_data.ptr != NULL) { chunk_free(&(this->vendor_id_data)); } free(this); } /* * Described in header */ vendor_id_payload_t *vendor_id_payload_create() { private_vendor_id_payload_t *this = malloc_thing(private_vendor_id_payload_t); /* interface functions */ this->public.payload_interface.verify = (status_t (*) (payload_t *))verify; this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules; this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length; this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type; this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type; this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type; this->public.payload_interface.destroy = (void (*) (payload_t *))destroy; /* public functions */ this->public.destroy = (void (*) (vendor_id_payload_t *)) destroy; this->public.set_data = (void (*) (vendor_id_payload_t *,chunk_t)) set_data; this->public.get_data_clone = (chunk_t (*) (vendor_id_payload_t *)) get_data_clone; this->public.get_data = (chunk_t (*) (vendor_id_payload_t *)) get_data; /* private variables */ this->critical = FALSE; this->next_payload = NO_PAYLOAD; this->payload_length = VENDOR_ID_PAYLOAD_HEADER_LENGTH; this->vendor_id_data = chunk_empty; return (&(this->public)); }