int main(int argc, char **argv)
{
if (argc != 3 && argc != 4)
{
printf("Usage: %s ip server_port [local_port]\n", argv[0]);
exit(1);
}
printf("Hd udp client\n");
init();
struct sockaddr_in addr;
int sock;
if ( (sock=socket(AF_INET, SOCK_DGRAM, 0)) <0)
{
perror("socket");
exit(1);
}
addr.sin_family = AF_INET;
if(argc == 4)
addr.sin_port = htons(atoi(argv[3]));
else
addr.sin_port = htons(3000);
addr.sin_addr.s_addr = INADDR_ANY;
if(bind(sock, (struct sockaddr *)&addr, sizeof(addr))<0)
{
perror("bind error");
exit(1);
}
pid_t recv_pid = fork();
if(recv_pid == 0)
{
printf("son process\n");
recv_process(sock);
}
else
{
addr.sin_family = AF_INET;
addr.sin_port = htons(atoi(argv[2]));
struct hostent *hostinfo;
// char buff[512]="{'gwid':'1234567890'}";
while (1)
{
// gets(buff);
hostinfo = gethostbyname(argv[1]);
while(hostinfo == NULL)
{
sleep(5);
hostinfo = gethostbyname(argv[1]);
}
addr.sin_addr.s_addr = *(unsigned int *)hostinfo->h_addr_list[0];
int n;
n = sendto(sock, send_buff, 512, 0, (struct sockaddr *)&addr, sizeof(addr));
if (n < 0)
{
perror("sendto");
close(sock);
break;
}
sleep(PING_TIME);
}
}
close(sock);
return 0;
}
int main(){
recv_process(config_with_ctl,send_ok,NULL);
}
