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/**** POSIX *******************************************************************/
/*
* To get the POSIX 'getline' function.
* We don't know what POSIX version is set by default.
*/
#define _POSIX_C_SOURCE 200809L
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/**** RELABSD *****************************************************************/
#include <relabsd/debug.h>
#include <relabsd/server.h>
#include <relabsd/util/string.h>
#include <relabsd/config/parameters.h>
/******************************************************************************/
/**** TYPES *******************************************************************/
/******************************************************************************/
struct relabsd_parameters_client_input
{
FILE * socket_as_file;
ssize_t size;
char * buffer;
size_t buffer_size;
};
/******************************************************************************/
/**** LOCAL FUNCTIONS *********************************************************/
/******************************************************************************/
static int get_next_argument
(
struct relabsd_parameters_client_input input [const restrict static 1]
)
{
errno = 0;
input->size =
getline
(
&(input->buffer),
&(input->buffer_size),
input->socket_as_file
);
if (input->size < 1)
{
RELABSD_ERROR
(
"Unable to read line from client socket: %s.",
strerror(errno)
);
return -1;
}
input->buffer[(input->size - 1)] = '\0';
return 0;
}
static void initialize_client_input
(
FILE socket_as_file [const static 1],
struct relabsd_parameters_client_input input [const restrict static 1]
)
{
input->socket_as_file = socket_as_file;
input->size = 0;
input->buffer = (char *) NULL;
input->buffer_size = 0;
}
static void finalize_client_input
(
struct relabsd_parameters_client_input input [const restrict static 1]
)
{
free((void *) input->buffer);
input->buffer = (char *) NULL;
input->buffer_size = 0;
}
static int handle_timeout_change
(
struct relabsd_parameters_client_input input [const restrict static 1],
struct relabsd_parameters parameters [const static 1]
)
{
int timeout_msec;
if (get_next_argument(input) < 0)
{
RELABSD_S_ERROR("Could not get timeout value from client.");
return -1;
}
if (relabsd_util_parse_int(input->buffer, 0, INT_MAX, &timeout_msec) < 0)
{
RELABSD_S_ERROR("Invalid timeout value from client.");
return -1;
}
relabsd_parameters_set_timeout(timeout_msec, parameters);
return 0;
}
static int handle_inputs
(
struct relabsd_parameters_client_input input [const restrict static 1],
struct relabsd_parameters parameters [const static 1]
)
{
for (;;)
{
if (get_next_argument(input) < 0)
{
RELABSD_S_ERROR("Could not get next client command.");
return -1;
}
if ((input->buffer[0] == '\n') || (input->buffer[0] == '\0'))
{
return 0;
}
else if
(
RELABSD_STRING_EQUALS("-q", input->buffer)
|| RELABSD_STRING_EQUALS("--quit", input->buffer)
)
{
relabsd_server_interrupt();
}
else if
(
RELABSD_STRING_EQUALS("-t", input->buffer)
|| RELABSD_STRING_EQUALS("--timeout", input->buffer)
)
{
if (handle_timeout_change(input, parameters) < 0)
{
return 0;
}
}
else if
(
RELABSD_STRING_EQUALS("-n", input->buffer)
|| RELABSD_STRING_EQUALS("--name", input->buffer)
)
{
/* TODO: implement */
RELABSD_PROG_ERROR("Unimplemented command \"%s\".", input->buffer);
}
else if
(
RELABSD_STRING_EQUALS("-m", input->buffer)
|| RELABSD_STRING_EQUALS("--mod-axis", input->buffer)
)
{
/* TODO: implement */
RELABSD_PROG_ERROR("Unimplemented command \"%s\".", input->buffer);
}
else
{
RELABSD_ERROR("Unknown client command \"%s\"", input->buffer);
return -1;
}
}
}
/******************************************************************************/
/**** EXPORTED FUNCTIONS ******************************************************/
/******************************************************************************/
int relabsd_parameters_handle_remote_client
(
FILE socket_as_file [const static 1],
struct relabsd_parameters parameters [const restrict static 1]
)
{
struct relabsd_parameters_client_input input;
initialize_client_input(socket_as_file, &input);
(void) handle_inputs(&input, parameters);
finalize_client_input(&input);
return 0;
}
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