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server.c File Reference

ADC-ZESOI protocol server. More...

#include <server.h>

Go to the source code of this file.

Defines
#define	TEST_MODE
Functions
int	main (int argc, char *argv[])
char*	readcommand (int fd)
	Read command form file. More...
command_t	parsecommand (const char *input, command_t status)
	Parse command. More...
command_t	executecommand (command_t c, command_t status, int fd)
	Executes command. More...
void	lostconnection (int sig)
	SIGPIPE handler. More...
int	acquireandsendsamples (int fd, int no_of_samples, int channel, char resolution)
	Acquires and sends samples. More...
void	stopstream (int sig)
	SIGTERM handler. More...
void	cleanallchildren (int sig)
	SIGCHLD handler. More...
Variables
const char*	help

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Detailed Description

ADC-ZESOI protocol server.

Author(s):

Tomislav Petković , Darko Vasić

Date:

2001-12-09

Definition in file server.c.

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Define Documentation

#define TEST_MODE

Value: Definition at line 19 of file server.c.

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Function Documentation

int acquireandsendsamples ( int fd, int no_of_samples, int channel, char resolution )

Acquires and sends samples. Acquire and send samples. TODO: This function should be replaced with a call to new program that continously stores data samples and proviedes them at request. That project layer is not yet completly implemented (Why? Ask project coordinator Zvonko Kostanjcar at zkostanj@diana.zesoi.fer.hr). Parameters: fd   File descriptor. no_of_samples   Number of samples to send. channel   Requested channel number. resolution   Requested resolution. Returns: Returns ACQUIRE_SUCCESS if successful. Definition at line 1436 of file server.c.

void cleanallchildren ( int sig )

SIGCHLD handler. Cleans all child processes. Parameters: sig   Signal number. Definition at line 1564 of file server.c.

command_t executecommand ( command_t c, command_t status, int fd )

Executes command. Executes command and prints useful messages about execution. Parameters: c   Command to execute. status   Server status. fd   File descriptor. Returns: Returns new server status. Definition at line 843 of file server.c.

void lostconnection ( int sig )

SIGPIPE handler. Handles SIGPIPE signal (broken pipe). This signal is received when client terminates connection. Terminates child proces and cleans up everything. Parameters: sig   Signal number. Definition at line 1406 of file server.c.

command_t parsecommand ( const char * input, command_t status )

Parse command. Input buffer is parsed for ADC-ZESOI protocol commands. Parameters: input   Input buffer. status   Status of the server. Returns: Returns a structure which contains command number and additional parameters. It's a copy of command_t status with command_no and error_code changed appropriately. Other parameters are changed if specified by parsed command. Definition at line 503 of file server.c.

char * readcommand ( int fd )

Read command form file. Reads an aribtrary length command form file specified by file descriptor. Parameters: fd   A file descriptor. Returns: Returns a pointer to a uninterpreted command, or NULL pointer if unsuccessful. Definition at line 451 of file server.c.

void stopstream ( int sig )

SIGTERM handler. Handles SIGTERM signal for child process when child process is sending data stream. Parameters: sig   Signal number. Definition at line 1531 of file server.c.

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Variable Documentation

const char * help

Initial value: "ADC-ZESOI server v" VERSION ".\n" "Usage:\n" " server [options]\n" "Options are:\n" " -h --help Prints this help message.\n" " -t --test Test mode - server creates random data (default).\n" " --notest Test mode disabled. Can't be used together with -t.\n" " -p <port>, --port=<port> Sets port to <port>. If ommited default port\n" " for ADC-ZESOI protocol (port 7777) is used.\n" " -a --auth Requires authentification. Default is no\n" " authentfication required (option -n).\n" " -n --noauth Disable authentification (default). Can't be\n" " used together with -a.\n" " --nullok Allow access for passwordless accounts.\n" " --maxretries=<retries> Sets maximum number of login attempts to\n" " given number. Default value is 3 login attempts.\n" " -v --version Show version number.\n" Definition at line 26 of file server.c.

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