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- source code documentation improved

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This commit is contained in:
Jan Hutter 2005-11-10 09:54:09 +00:00
parent c3dc6f1aae
commit c08ffafeb6
2 changed files with 110 additions and 56 deletions
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133
Source/charon/generator.c
View file

@ -30,62 +30,91 @@
/**
* Uused for geneartor operations
* Used for generator operations internaly to store a generator context.
*/
typedef struct generator_infos_s generator_infos_t;
struct generator_infos_s {
/**
* Buffer used to generate to
* Buffer used to generate the data into.
*/
u_int8_t *buffer;
/**
* current write position in buffer (one byte alligned)
* Current write position in buffer (one byte aligned).
*/
u_int8_t *out_position;
/**
* position of last byte in buffer
* Position of last byte in buffer.
*/
u_int8_t *roof_position;
/**
* Current bit writing to
* Current bit writing to in current byte (between 0 and 7).
*/
size_t current_bit;
/**
* Associated data struct to read informations from
* Associated data struct to read informations from.
*/
void * data_struct;
/**
* @brief Destroys a generator_infos_t object
* @brief Destroys a generator_infos_t object and its containing buffer
*
* @param generator_infos_t generator_infos_t object
* @return SUCCESSFUL if succeeded, FAILED otherwise
* @return always SUCCESSFUL
*/
status_t (*destroy) (generator_infos_t *this);
/**
* Checks if enough space is available in buffer and if not,
* the buffer size is increased until at least the asked amount of space
* is available
* Makes sure enough space is available in buffer to store amount of bits.
*
* If buffer is to small to hold the specific amount of bits it
* is increased using reallocation function of allocator.
*
* @param bits number of bits to make at leas available in buffer
* @param generator_infos_t generator_infos_t object
* @return SUCCESSFUL if succeeded, OUT_OF_RES otherwise
* @param generator_infos_t calling generator_infos_t object
* @param bits number of bits to make available in buffer
* @return
* - SUCCESSFUL if succeeded
* - OUT_OF_RES otherwise
*/
status_t (*make_space_available) (generator_infos_t *this,size_t bits);
/**
* Writes a specific amount of byte into the buffer.
*
* If buffer is to small to hold the specific amount of bytes it
* is increased.
*
* @param generator_infos_t calling generator_infos_t object
* @param bytes pointer to bytes to write
* @param number_of_bytes number of bytes to write into buffer
* @return
* - SUCCESSFUL if succeeded
* - OUT_OF_RES otherwise
*/
status_t (*write_bytes_to_buffer) (generator_infos_t *this,void * bytes,size_t number_of_bytes);
/**
* Writes the current buffer content into a chunk_t
*
* Memory of specific chunk_t gets allocated.
*
* @param generator_infos_t calling generator_infos_t object
* @param data pointer of chunk_t to write to
* @return
* - SUCCESSFUL if succeeded
* - OUT_OF_RES otherwise
*/
status_t (*write_chunk) (generator_infos_t *this,chunk_t *data);
};
/**
* implements generator_infos_t's increase_buffer function
* Implements generator_infos_t's increase_buffer function.
* See #generator_infos_s.increase_buffer.
*/
static status_t generator_info_make_space_available (generator_infos_t *this, size_t bits)
{
@ -112,6 +141,10 @@ static status_t generator_info_make_space_available (generator_infos_t *this, si
return SUCCESS;
}
/**
* Implements generator_infos_t's write_bytes_to_buffer function.
* See #generator_infos_s.write_bytes_to_buffer.
*/
static status_t generator_info_write_bytes_to_buffer (generator_infos_t *this,void * bytes,size_t number_of_bytes)
{
u_int8_t *read_position = (u_int8_t *) bytes;
@ -134,6 +167,10 @@ static status_t generator_info_write_bytes_to_buffer (generator_infos_t *this,vo
return status;
}
/**
* Implements generator_infos_t's write_chunk function.
* See #generator_infos_s.write_chunk.
*/
static status_t generator_infos_write_chunk (generator_infos_t *this,chunk_t *data)
{
size_t data_length = this->out_position - this->buffer;
@ -151,12 +188,12 @@ static status_t generator_infos_write_chunk (generator_infos_t *this,chunk_t *da
}
/**
* Implements generator_infos_t's destroy function.
* See #generator_infos_s.destroy.
*/
static status_t generator_infos_destroy (generator_infos_t *this)
{
if (this == NULL)
{
return FAILED;
}
allocator_free(this->buffer);
allocator_free(this);
return SUCCESS;
@ -164,9 +201,12 @@ static status_t generator_infos_destroy (generator_infos_t *this)
/**
* Creates a generator_infos_t object holding necessary informations
* for generating (buffer, data_struct, etc)
* for generating (buffer, data_struct, etc).
*
* @param data_struct where to read the data out
* @param data_struct data struct where the specific payload informations are stored
* @return
* - pointer to created generator_infos_t object
* - NULL if memory allocation failed
*/
generator_infos_t * generator_infos_create(void *data_struct)
{
@ -202,36 +242,45 @@ generator_infos_t * generator_infos_create(void *data_struct)
/**
* Private data of a generator_t object
* Private part of a generator_t object
*/
typedef struct private_generator_s private_generator_t;
struct private_generator_s {
/**
* Public part of a generator object
* Public part of a generator_t object
*/
generator_t public;
/* private functions and fields */
/**
* Generates a chunk_t with specific encoding rules
* Generates a chunk_t with specific encoding rules.
*
* items are bytewhise written
* Iems are bytewhise written.
*
* @param this private_generator_t object
* @param data_struct data_struct to read data from
* @param encoding_rules pointer to first encoding_rule of encoding rules array
* @param encoding_rules_count number of encoding rules in encoding rules array
* @param data pointer to chunk where to write the data in
* @param this private_generator_t object
* @param data_struct data_struct to read data from
* @param encoding_rules pointer to first encoding_rule
* of encoding rules array
* @param encoding_rules_count number of encoding rules
* in encoding rules array
* @param data pointer to chunk_t where to write the data in
*
* @return SUCCESS if succeeded,
* OUT_OF_RES if out of ressources
* @return - SUCCESS if succeeded
* - OUT_OF_RES if out of ressources
*/
status_t (*generate) (private_generator_t *this,void * data_struct,encoding_rule_t *encoding_rules, size_t encoding_rules_count, chunk_t *data);
/**
* TODO
* Generates a U_INT-Field type
*
* @param this private_generator_t object
* @param int_type type of U_INT field (U_INT_4, U_INT_8, etc.)
* @param offset offset of value in data struct
* @param generator_infos generator_infos_t object where the context is written or read from
* @return - SUCCESS if succeeded
* - OUT_OF_RES if out of ressources
*/
status_t (*generate_u_int_type) (private_generator_t *this,encoding_type_t int_type,u_int32_t offset, generator_infos_t *generator_infos);
@ -243,7 +292,8 @@ struct private_generator_s {
};
/**
* implements private_generator_t's double_buffer function
* Implements private_generator_t's generate_u_int_type function.
* See #private_generator_s.generate_u_int_type.
*/
static status_t generate_u_int_type (private_generator_t *this,encoding_type_t int_type,u_int32_t offset,generator_infos_t *generator_infos)
{
@ -352,7 +402,8 @@ static status_t generate_u_int_type (private_generator_t *this,encoding_type_t i
}
/**
* implements private_generator_t's generate function
* Implements private_generator_t's generate function.
* See #private_generator_s.generate.
*/
static status_t generate (private_generator_t *this,void * data_struct,encoding_rule_t *encoding_rules, size_t encoding_rules_count, chunk_t *data)
{
@ -444,6 +495,10 @@ static status_t generate (private_generator_t *this,void * data_struct,encoding_
return status;
}
/**
* Implements generator_t's generate_payload function.
* See #generator_s.generate_payload.
*/
static status_t generate_payload (private_generator_t *this,payload_type_t payload_type,void * data_struct, chunk_t *data)
{
int i;
@ -461,15 +516,11 @@ static status_t generate_payload (private_generator_t *this,payload_type_t paylo
}
/**
* Implementation of generator_t's destroy function
* Implements generator_t's destroy function.
* See #generator_s.destroy.
*/
static status_t destroy(private_generator_t *this)
{
if (this == NULL)
{
return FAILED;
}
allocator_free(this);
return SUCCESS;
}

33
Source/charon/generator.h
View file

@ -38,32 +38,34 @@
#define GENERATOR_DATA_BUFFER_INCREASE_VALUE 1000
/**
* @brief A generator_t object which generates payloads of specific type
*A generator_t object which generates payloads of specific type.
*/
typedef struct generator_s generator_t;
struct generator_s {
/**
* @brief Generates a specific payload from given data struct
* @brief Generates a specific payload from given data struct.
*
* Remember: Header and substructures are also seen as payloads
* Remember: Header and substructures are also handled as payloads.
*
* @param generator generator object
* @param payload_type payload type to generate using the given data struct
* @param[in] data_struct Data struct where the needed data for generating are stored
* @param[out] output pointer to a chunk_t where the data are generated to
* @return SUCCESSFUL if succeeded,
* NOT_SUPPORTED if payload_type is not supported
* OUT_OF_RES if out of ressources
* @param generator generator_t object
* @param payload_type payload type to generate using the given data struct
* @param[in] data_struct data struct where the needed data for generating are stored
* @param[out] output pointer to a chunk_t where the data are generated to
* @return
* - SUCCESSFUL if succeeded
* - NOT_SUPPORTED if payload_type is not supported
* - OUT_OF_RES if out of ressources
*/
status_t (*generate_payload) (generator_t *this,payload_type_t payload_type,void * data_struct, chunk_t *data);
/**
* @brief Destroys a generator object
* @brief Destroys a generator_t object.
*
* @param generator generator object
* @return SUCCESSFUL if succeeded, FAILED otherwise
* @param generator generator_t object
*
* @return always success
*/
status_t (*destroy) (generator_t *this);
};
@ -71,8 +73,9 @@ struct generator_s {
/**
* Constructor to create a generator
*
* @param payload_infos pointer to the payload_info_t-array containing
* all the payload informations needed to automatic generate a specific payload
* @param payload_infos pointer to the payload_info_t-array containing
* all the payload informations needed to
* automatic generate a specific payload
*/
generator_t * generator_create(payload_info_t ** payload_infos);