diff options
Diffstat (limited to 'src/libcharon/encoding/payloads/unknown_payload.c')
| -rw-r--r-- | src/libcharon/encoding/payloads/unknown_payload.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/unknown_payload.c b/src/libcharon/encoding/payloads/unknown_payload.c new file mode 100644 index 000000000..dd5547dc3 --- /dev/null +++ b/src/libcharon/encoding/payloads/unknown_payload.c @@ -0,0 +1,201 @@ +/* + * 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 <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 <stddef.h> + +#include "unknown_payload.h" + + + +typedef struct private_unknown_payload_t private_unknown_payload_t; + +/** + * Private data of an unknown_payload_t object. + */ +struct private_unknown_payload_t { + + /** + * Public unknown_payload_t interface. + */ + unknown_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 data. + */ + chunk_t data; +}; + +/** + * Encoding rules to parse an payload which is not further specified. + * + * The defined offsets are the positions in a object of type + * private_unknown_payload_t. + * + */ +encoding_rule_t unknown_payload_encodings[] = { + /* 1 Byte next payload type, stored in the field next_payload */ + { U_INT_8, offsetof(private_unknown_payload_t, next_payload)}, + /* the critical bit */ + { FLAG, offsetof(private_unknown_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_unknown_payload_t, payload_length)}, + /* some unknown data bytes, length is defined in PAYLOAD_LENGTH */ + { UNKNOWN_DATA, offsetof(private_unknown_payload_t, 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 ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! ! + ~ Data of any type ~ + ! ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ + +/** + * Implementation of payload_t.verify. + */ +static status_t verify(private_unknown_payload_t *this) +{ + /* can't do any checks, so we assume its good */ + return SUCCESS; +} + +/** + * Implementation of payload_t.get_encoding_rules. + */ +static void get_encoding_rules(private_unknown_payload_t *this, encoding_rule_t **rules, size_t *rule_count) +{ + *rules = unknown_payload_encodings; + *rule_count = sizeof(unknown_payload_encodings) / sizeof(encoding_rule_t); +} + +/** + * Implementation of payload_t.get_type. + */ +static payload_type_t get_payload_type(private_unknown_payload_t *this) +{ + return UNKNOWN_PAYLOAD; +} + +/** + * Implementation of payload_t.get_next_type. + */ +static payload_type_t get_next_type(private_unknown_payload_t *this) +{ + return (this->next_payload); +} + +/** + * Implementation of payload_t.set_next_type. + */ +static void set_next_type(private_unknown_payload_t *this,payload_type_t type) +{ + this->next_payload = type; +} + +/** + * Implementation of payload_t.get_length. + */ +static size_t get_length(private_unknown_payload_t *this) +{ + return this->payload_length; +} + +/** + * Implementation of unknown_payload_t.get_data. + */ +static bool is_critical(private_unknown_payload_t *this) +{ + return this->critical; +} + +/** + * Implementation of unknown_payload_t.get_data. + */ +static chunk_t get_data (private_unknown_payload_t *this) +{ + return (this->data); +} + +/** + * Implementation of payload_t.destroy and unknown_payload_t.destroy. + */ +static void destroy(private_unknown_payload_t *this) +{ + if (this->data.ptr != NULL) + { + chunk_free(&(this->data)); + } + + free(this); +} + +/* + * Described in header + */ +unknown_payload_t *unknown_payload_create() +{ + private_unknown_payload_t *this = malloc_thing(private_unknown_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 (*) (unknown_payload_t *)) destroy; + this->public.is_critical = (bool (*) (unknown_payload_t *)) is_critical; + this->public.get_data = (chunk_t (*) (unknown_payload_t *)) get_data; + + /* private variables */ + this->critical = FALSE; + this->next_payload = NO_PAYLOAD; + this->payload_length = UNKNOWN_PAYLOAD_HEADER_LENGTH; + this->data = chunk_empty; + + return (&(this->public)); +} |