diff options
author | Jan Hutter <jhutter@hsr.ch> | 2005-11-29 15:23:04 +0000 |
---|---|---|
committer | Jan Hutter <jhutter@hsr.ch> | 2005-11-29 15:23:04 +0000 |
commit | 7da522ba73ed0a42445c1fb48efa18a85338b600 (patch) | |
tree | 3080e0997aecf127647e419605a24dfd69a2891c /Source/charon/encoding/payloads/traffic_selector_substructure.c | |
parent | 346af6f3de4735b2c7c8b6abf824bd0258c4be6c (diff) | |
download | strongswan-7da522ba73ed0a42445c1fb48efa18a85338b600.tar.bz2 strongswan-7da522ba73ed0a42445c1fb48efa18a85338b600.tar.xz |
- implemented and tested ts_payload_t
Diffstat (limited to 'Source/charon/encoding/payloads/traffic_selector_substructure.c')
-rw-r--r-- | Source/charon/encoding/payloads/traffic_selector_substructure.c | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/Source/charon/encoding/payloads/traffic_selector_substructure.c b/Source/charon/encoding/payloads/traffic_selector_substructure.c new file mode 100644 index 000000000..d2c9af54d --- /dev/null +++ b/Source/charon/encoding/payloads/traffic_selector_substructure.c @@ -0,0 +1,338 @@ +/** + * @file traffic_selector_substructure.c + * + * @brief Interface of traffic_selector_substructure_t. + * + */ + +/* + * Copyright (C) 2005 Jan Hutter, Martin Willi + * 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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 "traffic_selector_substructure.h" + +#include <encoding/payloads/encodings.h> +#include <utils/allocator.h> +#include <utils/linked_list.h> + +/** + * String mappings for ts_type_t. + */ +mapping_t ts_type_m[] = { +{TS_IPV4_ADDR_RANGE, "TS_IPV4_ADDR_RANGE"}, +{TS_IPV6_ADDR_RANGE, "TS_IPV6_ADDR_RANGE"}, +{MAPPING_END, NULL} +}; + + +typedef struct private_traffic_selector_substructure_t private_traffic_selector_substructure_t; + +/** + * Private data of an traffic_selector_substructure_t object. + * + */ +struct private_traffic_selector_substructure_t { + /** + * Public traffic_selector_substructure_t interface. + */ + traffic_selector_substructure_t public; + + /** + * Type of traffic selector. + */ + u_int8_t ts_type; + + /** + * IP Protocol ID. + */ + u_int8_t ip_protocol_id; + + /** + * Length of this payload. + */ + u_int16_t payload_length; + + /** + * Start port number. + */ + u_int16_t start_port; + + /** + * End port number. + */ + u_int16_t end_port; + + /** + * Starting address. + */ + chunk_t starting_address; + + /** + * Ending address. + */ + chunk_t ending_address; +}; + +/** + * Encoding rules to parse or generate a TS payload + * + * The defined offsets are the positions in a object of type + * private_traffic_selector_substructure_t. + * + */ +encoding_rule_t traffic_selector_substructure_encodings[] = { + /* 1 Byte next ts type*/ + { TS_TYPE, offsetof(private_traffic_selector_substructure_t, ts_type) }, + /* 1 Byte IP protocol id*/ + { U_INT_8, offsetof(private_traffic_selector_substructure_t, ip_protocol_id) }, + /* Length of the whole payload*/ + { PAYLOAD_LENGTH, offsetof(private_traffic_selector_substructure_t, payload_length) }, + /* 2 Byte start port*/ + { U_INT_16, offsetof(private_traffic_selector_substructure_t, start_port) }, + /* 2 Byte end port*/ + { U_INT_16, offsetof(private_traffic_selector_substructure_t, end_port) }, + /* starting address is either 4 or 16 byte */ + { ADDRESS, offsetof(private_traffic_selector_substructure_t, starting_address) }, + /* ending address is either 4 or 16 byte */ + { ADDRESS, offsetof(private_traffic_selector_substructure_t, ending_address) } + +}; + +/* + 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 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! TS Type !IP Protocol ID*| Selector Length | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Start Port* | End Port* | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! ! + ~ Starting Address* ~ + ! ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! ! + ~ Ending Address* ~ + ! ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ + +/** + * Implementation of payload_t.verify. + */ +static status_t verify(private_traffic_selector_substructure_t *this) +{ + + if (this->start_port > this->end_port) + { + return FAILED; + } + switch (this->ts_type) + { + case TS_IPV4_ADDR_RANGE: + { + if ((this->starting_address.len != 4) || + (this->ending_address.len != 4)) + { + /* ipv4 address must be 4 bytes long */ + return FAILED; + } + break; + } + case TS_IPV6_ADDR_RANGE: + default: + { + /* not supported ts type */ + return FAILED; + } + } + + + return SUCCESS; +} + +/** + * Implementation of traffic_selector_substructure_t.get_encoding_rules. + */ +static void get_encoding_rules(private_traffic_selector_substructure_t *this, encoding_rule_t **rules, size_t *rule_count) +{ + *rules = traffic_selector_substructure_encodings; + *rule_count = sizeof(traffic_selector_substructure_encodings) / sizeof(encoding_rule_t); +} + +/** + * Implementation of payload_t.get_type. + */ +static payload_type_t get_payload_type(private_traffic_selector_substructure_t *this) +{ + return TRAFFIC_SELECTOR_SUBSTRUCTURE; +} + +/** + * Implementation of payload_t.get_next_type. + */ +static payload_type_t get_next_type(private_traffic_selector_substructure_t *this) +{ + return 0; +} + +/** + * Implementation of payload_t.set_next_type. + */ +static void set_next_type(private_traffic_selector_substructure_t *this,payload_type_t type) +{ +} + +/** + * Implementation of payload_t.get_length. + */ +static size_t get_length(private_traffic_selector_substructure_t *this) +{ + return this->payload_length; +} + +/** + * Implementation of traffic_selector_substructure_t.get_ts_type. + */ +static ts_type_t get_ts_type (private_traffic_selector_substructure_t *this) +{ + return this->ts_type; +} + +/** + * Implementation of traffic_selector_substructure_t.set_ts_type. + */ +static void set_ts_type (private_traffic_selector_substructure_t *this,ts_type_t ts_type) +{ + this->ts_type = ts_type; +} + +/** + * Implementation of traffic_selector_substructure_t.get_protocol_id. + */ +static u_int8_t get_protocol_id (private_traffic_selector_substructure_t *this) +{ + return this->ip_protocol_id; +} + +/** + * Implementation of traffic_selector_substructure_t.set_protocol_id. + */ +static void set_protocol_id (private_traffic_selector_substructure_t *this,u_int8_t protocol_id) +{ + this->ip_protocol_id = protocol_id; +} + +/** + * Implementation of traffic_selector_substructure_t.get_start_host. + */ +static host_t * get_start_host (private_traffic_selector_substructure_t *this) +{ + return (host_create_from_chunk(AF_INET,this->starting_address, this->start_port)); +} + +/** + * Implementation of traffic_selector_substructure_t.set_start_host. + */ +static void set_start_host (private_traffic_selector_substructure_t *this,host_t *start_host) +{ + this->start_port = start_host->get_port(start_host); + if (this->starting_address.ptr != NULL) + { + allocator_free_chunk(&(this->starting_address)); + } + this->starting_address = start_host->get_address_as_chunk(start_host); + this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH + this->starting_address.len + this->ending_address.len; +} + +/** + * Implementation of traffic_selector_substructure_t.get_end_host. + */ +static host_t *get_end_host (private_traffic_selector_substructure_t *this) +{ + return (host_create_from_chunk(AF_INET,this->ending_address, this->end_port)); +} + +/** + * Implementation of traffic_selector_substructure_t.set_end_host. + */ +static void set_end_host (private_traffic_selector_substructure_t *this,host_t *end_host) +{ + this->end_port = end_host->get_port(end_host); + if (this->ending_address.ptr != NULL) + { + allocator_free_chunk(&(this->ending_address)); + } + this->ending_address = end_host->get_address_as_chunk(end_host); + this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH + this->starting_address.len + this->ending_address.len; +} + +/** + * Implementation of payload_t.destroy and traffic_selector_substructure_t.destroy. + */ +static void destroy(private_traffic_selector_substructure_t *this) +{ + + if (this->starting_address.ptr != NULL) + { + allocator_free_chunk(&(this->starting_address)); + } + + if (this->ending_address.ptr != NULL) + { + allocator_free_chunk(&(this->ending_address)); + } + + allocator_free(this); +} + +/* + * Described in header + */ +traffic_selector_substructure_t *traffic_selector_substructure_create(bool is_initiator) +{ + private_traffic_selector_substructure_t *this = allocator_alloc_thing(private_traffic_selector_substructure_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 (*) (traffic_selector_substructure_t *)) destroy; + this->public.get_ts_type = (ts_type_t (*) (traffic_selector_substructure_t *)) get_ts_type; + this->public.set_ts_type = (void (*) (traffic_selector_substructure_t *,ts_type_t)) set_ts_type; + this->public.get_protocol_id = (u_int8_t (*) (traffic_selector_substructure_t *)) get_protocol_id; + this->public.set_protocol_id = (void (*) (traffic_selector_substructure_t *,u_int8_t)) set_protocol_id; + this->public.get_start_host = (host_t * (*) (traffic_selector_substructure_t *))get_start_host; + this->public.set_start_host = (void (*) (traffic_selector_substructure_t *, host_t *))set_start_host; + this->public.get_end_host = (host_t * (*) (traffic_selector_substructure_t *))get_end_host; + this->public.set_end_host = (void (*) (traffic_selector_substructure_t *, host_t *))set_end_host; + + + /* private variables */ + this->payload_length =TRAFFIC_SELECTOR_HEADER_LENGTH; + this->start_port = 0; + this->end_port = 0; + this->starting_address = CHUNK_INITIALIZER; + this->ending_address = CHUNK_INITIALIZER; + this->ip_protocol_id = 0; + /* must be set to be valid */ + this->ts_type = TS_IPV4_ADDR_RANGE; + + return (&(this->public)); +} |