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#include <stdio.h>
#include <stdint.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <uuid/uuid.h>
#include "alarmd_proto.h"
/* Helper function */
int8_t recv_string(int sock, char (*buffer)[128])
{
uint8_t length = 0;
if (recv(sock, &length, sizeof(uint8_t), 0) < sizeof(uint8_t)) {
return -1;
}
if (length >= 128) {
return -1;
}
if (recv(sock, buffer, length, 0) < 0) {
return -1;
}
(*buffer)[length] = '\0';
return length;
}
/* Helper function */
int send_string(int sock, char *buffer)
{
ssize_t sent = 0;
size_t length = 0;
uint8_t length8 = 0;
/* Protocol allows strings of length < 128 */
if (length >= 128) {
return 1;
}
/* bitmasking is unnecessary by now aside from clarity */
length8 = length8 & 0xFF;
if (send(sock, &length8, sizeof(length8), 0) < sizeof(length8)) {
return 1;
}
sent = send(sock, buffer, length8, 0);
if (sent < 0) {
perror("send");
return 1;
} else if (sent < length8) {
return 1;
}
return 0;
}
/* Helper function */
int send_packet_uuid(int sock, uint32_t packet_type, uuid_t uuid)
{
return (send(sock, &packet_type, sizeof(packet_type), 0) != sizeof(packet_type)
|| send(sock, uuid, sizeof(uuid_t), 0) != 16);
}
/** End helper functions ***********/
int alarmd_register(int sock, char *desc, uuid_t *uuid)
{
uint8_t length = 0;
uint32_t packet_type = 0;
packet_type = ALARMD_PACKET_TYPE_REGISTER;
if (send(sock, &packet_type, sizeof(packet_type), 0) != sizeof(packet_type)) {
perror("send");
return 1;
}
length = strlen(desc);
if (send(sock, &length, sizeof(length), 0) != sizeof(length)) {
perror("send");
return 1;
}
if (send(sock, desc, strlen(desc), 0) != strlen(desc)) {
perror("send");
return 1;
}
if (recv(sock, uuid, sizeof(*uuid), 0) != sizeof(*uuid)) {
perror("recv");
return 1;
}
return 0;
}
int alarmd_deregister(int sock, uuid_t uuid)
{
return send_packet_uuid(sock, ALARMD_PACKET_TYPE_DEREGISTER, uuid);
}
int alarmd_raise(int sock, uuid_t uuid)
{
return send_packet_uuid(sock, ALARMD_PACKET_TYPE_RAISE, uuid);
}
int alarmd_clear(int sock, uuid_t uuid)
{
return send_packet_uuid(sock, ALARMD_PACKET_TYPE_CLEAR, uuid);
}
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