Libtrap: Internal development docs  1.16.1
Modules | Functions | Variables
Simple API
Collaboration diagram for Simple API:

Modules

 Message format
 

Functions

int trap_free_ifc_spec (trap_ifc_spec_t ifc_spec)
 
int trap_init (trap_module_info_t *module_info, trap_ifc_spec_t ifc_spec)
 
int trap_terminate ()
 
int trap_finalize ()
 
int trap_send_data (unsigned int ifcidx, const void *data, uint16_t size, int timeout)
 
int trap_recv (uint32_t ifcidx, const void **data, uint16_t *size)
 Receive data from input interface. More...
 
int trap_send (uint32_t ifcidx, const void *data, uint16_t size)
 Send data via output interface. More...
 
void trap_set_verbose_level (int level)
 
int trap_get_verbose_level ()
 
void trap_set_help_section (int level)
 
void trap_print_help (const trap_module_info_t *module_info)
 
void trap_print_ifc_spec_help ()
 
int trap_ifcctl (int8_t type, uint32_t ifcidx, int32_t request,...)
 Control TRAP interface. More...
 
void trap_send_flush (uint32_t ifc)
 Force flush of buffer. More...
 

Variables

int trap_last_error
 Code of last error (one of the codes above) More...
 
const char * trap_last_error_msg
 Human-readable message about last error. More...
 

Detailed Description

Function Documentation

◆ trap_finalize()

int trap_finalize ( )

Cleanup function. Disconnect all interfaces and do all necessary cleanup.

Returns
Error code

Definition at line 578 of file trap.c.

◆ trap_free_ifc_spec()

int trap_free_ifc_spec ( trap_ifc_spec_t  ifc_spec)

Destructor of trap_ifc_spec_t structure.

Parameters
[in]ifc_spectrap_ifc_spec_t structure to clear.
Returns
Error code (0 on success)

Definition at line 497 of file trap.c.

◆ trap_get_verbose_level()

int trap_get_verbose_level ( )

Get verbosity level. See trap_set_verbose_level for list of levels.

Returns
Verbosity level currently set in the library.

Definition at line 663 of file trap.c.

◆ trap_ifcctl()

int trap_ifcctl ( int8_t  type,
uint32_t  ifcidx,
int32_t  request,
  ... 
)

Control TRAP interface.

Note
Type and request types were changed from enum because of python wrapper.
Parameters
[in]typetrap_ifc_type direction of interface
[in]ifcidxindex of TRAP interface
[in]requesttrap_ifcctl_request type of operation
[in,out]...arguments of request, see trap_ifcctl_request for more details on requests and their arguments.

Examples:

Returns
TRAP_E_OK on success

Definition at line 1231 of file trap.c.

◆ trap_init()

int trap_init ( trap_module_info_t *  module_info,
trap_ifc_spec_t  ifc_spec 
)

Initialization function. Create and initialize all interfaces.

Parameters
[in]module_infoPointer to struct containing info about the module.
[in]ifc_specStructure with specification of interface types and their parameters.
Returns
Error code (0 on success)

Definition at line 526 of file trap.c.

◆ trap_print_help()

void trap_print_help ( const trap_module_info_t *  module_info)

Print common TRAP help message. The help message contains information from module_info and describes common TRAP command-line parameters.

Parameters
[in]module_infoPointer to struct containing info about the module.

Definition at line 898 of file trap.c.

◆ trap_print_ifc_spec_help()

void trap_print_ifc_spec_help ( )

Print help about interface specifier. Prints help message about format of interface specifier and description of all available interface types. This message is normally a part of help printed by trap_print_help, this function is useful when you don't use standard TRAP command-line parameters but you still use the same format of interface specifier.

Print help about interface specifier. Prints help message about format of interface specifier and description of all available interface types.

Definition at line 1138 of file trap.c.

◆ trap_recv()

int trap_recv ( uint32_t  ifcidx,
const void **  data,
uint16_t *  size 
)

Receive data from input interface.

Receive a message from interface specified by ifcidx and set pointer to the data. When function returns due to timeout, contents of data and size are undefined.

Parameters
[in]ifcidxIndex of input IFC.
[out]dataPointer to received data.
[out]sizeSize of received data in bytes of data.
Returns
Error code - TRAP_E_OK on success, TRAP_E_TIMEOUT if timeout elapses.
Note
Data must not be freed! Library stores incomming data into static array and rewrites it during every trap_recv() call.
See also
trap_ifcctl() to set timeout (TRAPCTL_SETTIMEOUT)

Definition at line 631 of file trap.c.

◆ trap_send()

int trap_send ( uint32_t  ifcidx,
const void *  data,
uint16_t  size 
)

Send data via output interface.

Send a message given by data pointer of size message size via interface specified by ifcidx that is the index of output interfaces (counted from 0).

Parameters
[in]ifcidxIndex of input IFC.
[out]dataPointer to message to send.
[out]sizeSize of message in bytes.
Returns
Error code - TRAP_E_OK on success, TRAP_E_TIMEOUT if timeout elapses.
See also
trap_ifcctl() to set timeout (TRAPCTL_SETTIMEOUT)

Definition at line 624 of file trap.c.

◆ trap_send_data()

int trap_send_data ( unsigned int  ifcidx,
const void *  data,
uint16_t  size,
int  timeout 
)

Send data to output interface. Write data of size size given by data pointer into interface ifc. If data cannot be written immediately (e.g. because of full buffer or lost connection), wait until write is possible or timeout microseconds elapses. If timeout < 0, wait indefinitely.

Parameters
[in]ifcidxIndex of interface to write into.
[in]dataPointer to data.
[in]sizeNumber of bytes of data.
[in]timeoutTimeout in microseconds for non-blocking mode; timeout can be also: TRAP_WAIT, TRAP_HALFWAIT, or TRAP_NO_WAIT.
Returns
Error code - 0 on success, TRAP_E_TIMEOUT if timeout elapses.
Deprecated:
This function should be replaced by trap_send().

Definition at line 618 of file trap.c.

◆ trap_send_flush()

void trap_send_flush ( uint32_t  ifc)

Force flush of buffer.

Parameters
[in]ifcIFC Index of interface to write into.

Definition at line 1241 of file trap.c.

◆ trap_set_help_section()

void trap_set_help_section ( int  level)

Set section for trap_print_help()

Parameters
[in]level0 for default info about module, 1 for info about IFC specifier

Definition at line 324 of file trap.c.

◆ trap_set_verbose_level()

void trap_set_verbose_level ( int  level)

Set verbosity level of library functions. Verbosity levels may be:

  • -3 - errors
  • -2 - warnings
  • -1 - notices (default)
  • 0 - verbose
  • 1 - more verbose
  • 2 - even more verbose
Parameters
[in]levelDesired level of verbosity.

Set verbosity level. Verbosity levels are:

  • -3 - errors
  • -2 - warnings
  • -1 - notices (default)
  • 0 - verbose
  • 1 - more verbose
  • 2 - even more verbose
Parameters
[in]levelDesired level of verbosity.

Definition at line 654 of file trap.c.

◆ trap_terminate()

int trap_terminate ( )

Function to terminate module's operation. This function stops all read/write operations on all interfaces. Any waiting in trap_recv() and trap_send()_data is interrupted and these functions return immediately with TRAP_E_TERMINATED. Any call of trap_recv() or trap_send() after call of this function returns TRAP_E_TERMINATED.

This function is used to terminate module's operation (asynchronously), e.g. in SIGTERM handler.

Returns
Always TRAP_E_OK (0).

Definition at line 563 of file trap.c.

Variable Documentation

◆ trap_last_error

int trap_last_error

Code of last error (one of the codes above)

Definition at line 123 of file trap.c.

◆ trap_last_error_msg

const char* trap_last_error_msg

Human-readable message about last error.

Definition at line 125 of file trap.c.