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irmc/src/cwprotocol.c

86 lines
2.1 KiB

#include <stdio.h>
#include <sys/socket.h>
#include "cwprotocol.h"
/* Global variables */
struct command_packet_format connect_packet = {CON, DEFAULT_CHANNEL};
struct command_packet_format disconnect_packet = {DIS, 0};
struct data_packet_format id_packet;
struct data_packet_format rx_data_packet;
struct data_packet_format tx_data_packet;
int tx_sequence = 0, rx_sequence;
int fd_socket;
int prepare_id (struct data_packet_format *id_packet, char *id)
{
id_packet->command = DAT;
id_packet->length = SIZE_DATA_PACKET_PAYLOAD;
snprintf(id_packet->id, SIZE_ID, id, "%s");
id_packet->sequence = 0;
id_packet->n = 0;
snprintf(id_packet->status, SIZE_ID, INTERFACE_VERSION);
id_packet->a21 = 1; /* These magic numbers was provided by Les Kerr */
id_packet->a22 = 755;
id_packet->a23 = 65535;
return 0;
}
int prepare_tx (struct data_packet_format *tx_packet, char *id)
{
int i;
tx_packet->command = DAT;
tx_packet->length = SIZE_DATA_PACKET_PAYLOAD;
snprintf(tx_packet->id, SIZE_ID, id, "%s");
tx_packet->sequence = 0;
tx_packet->n = 0;
for(i = 1; i < 51; i++)tx_packet->code[i] = 0;
tx_packet->a21 = 0; /* These magic numbers was provided by Les Kerr */
tx_packet->a22 = 755;
tx_packet->a23 = 16777215;
snprintf(tx_packet->status, SIZE_STATUS, "?"); // this shall include the sent character
return 0;
}
// connect to server and send my id.
void identifyclient(void)
{
tx_sequence++;
id_packet.sequence = tx_sequence;
send(fd_socket, &connect_packet, SIZE_COMMAND_PACKET, 0);
send(fd_socket, &id_packet, SIZE_DATA_PACKET, 0);
}
int send_latch (void)
{
int i;
tx_sequence++;
tx_data_packet.sequence = tx_sequence;
tx_data_packet.code[0] = -1;
tx_data_packet.code[1] = 1;
tx_data_packet.n = 2;
for(i = 0; i < 5; i++) send(fd_socket, &tx_data_packet, SIZE_DATA_PACKET, 0);
tx_data_packet.n = 0;
return 0;
}
int send_unlatch (void)
{
int i;
tx_sequence++;
tx_data_packet.sequence = tx_sequence;
tx_data_packet.code[0] = -1;
tx_data_packet.code[1] = 2;
tx_data_packet.n = 2;
for(i = 0; i < 5; i++) send(fd_socket, &tx_data_packet, SIZE_DATA_PACKET, 0);
tx_data_packet.n = 0;
return 0;
}