#ifndef _ip_utils_h_defined_
#define _ip_utils_h_defined_

// Connect to the tcp server on the given host at the given port.

   extern int tcp_connect(const char * host, const char * service);

// Connect to the udp server on the given host at the given port.

   extern int udp_connect(const char * host, const char * service);

// Print the given error message and die.

   extern void errexit(const char * format, ...);

// Read at most bsize bytes from s into buffer.  Return the number of bytes
// actually read.

   extern unsigned tcp_read(int s, char * buffer, unsigned bsize);

// Open a server-side udp socekt at the given port.

   extern int passive_udp(const char * service);

// Open a server-side tcp socket at the given port with the given
// listener-queue length.

  extern int passive_tcp(const char * service, unsigned qlen = 10);

// Return the next client connecting to the given server-side socket.

  extern int accept_tcp(int);


#endif