#ifndef _WIN32
void closesocket(int fd);
#endif

int open_tcp_port(short portno);
int open_any_tcp_port(short *portno);
int open_any_udp_port(short *portno);
int connect_to_host(char *hostname, short portno);
int sendall(int sockfd, char *buffer, int bufLen, int flags);
int readall(int sockfd, char *buffer, int bufLen, int flags);
int socket_ready(int sock);