int mqtt_network_connect(mqtt_network_t* n, const char* host, int port)
{
struct sockaddr_in addr;
int ret;
if (host2addr(host, &(addr.sin_addr)) != 0)
{
return -1;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
n->my_socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if( n->my_socket < 0 )
{
// error
return -1;
}
ret = connect(n->my_socket, ( struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if( ret < 0 )
{
// error
close(n->my_socket);
return ret;
}
return ret;
}
int send_wol_packet(unsigned char *broadcast_addr, unsigned char *mac_addr)
{
int sd;
int optval;
char unsigned buf[BUFMAX];
size_t len;
struct sockaddr_in sin;
unsigned char mac[MACLEN];
unsigned char *p;
int i, j;
bzero((char *)&sin, sizeof(sin));
sin.sin_family = AF_INET;
host2addr((char *)broadcast_addr, &sin.sin_addr, &sin.sin_family);
sin.sin_port = htons(9);
if ((sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
fprintf(stderr, "Can't get socket.\n");
return 1;
}
optval = 1;
if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) < 0) {
fprintf(stderr, "Can't set sockopt: %d.\n", errno);
return 1;
}
p = mac_addr;
j = hex2(p);
if (j < 0) {
MACerror: fprintf(stderr,"Illegal MAC address: %s.\n", mac_addr);
return 1;
}
mac[0] = j;
p += 2;
for (i = 1; i < MACLEN; i++) {
if (*p++ != ':') goto MACerror;
j = hex2(p);
if (j < 0) goto MACerror;
mac[i] = j;
p += 2;
}
p = buf;
for (i = 0; i < 6; i++) {
*p++ = 0xFF;
}
for (i = 0; i < 16; i++) {
for (j = 0; j < MACLEN; j++) {
*p++ = mac[j];
}
}
len = p - buf;
if (sendto(sd, buf, len, 0, (struct sockaddr*)&sin, sizeof(sin)) != len) {
fprintf(stderr, "Failed to send: %d.\n", errno);
}
return 0;
}
