SYNTAX

#include <socket.h>

ssize_t socket_recv4(int s, char* buf, size_t len,
                 char ip[4],uint16* port);

DESCRIPTION

socket_recv4 receives up to len bytes starting at buf from a UDP datagram coming in on the socket s. It writes the UDP port to port and the IP address to ip, and returns the number of bytes actually received (or -1 if anything went wrong).

RETURN VALUE

socket_recv4 returns the number of bytes in the datagram if one was received. If not, it returns -1 and sets errno appropriately.

EXAMPLE

  #include <socket.h>

  int s;
  char ip[4];
  uint16 p;
  char buf[1000];
  int len;

  s = socket_tcp4();
  socket_bind4(s,ip,p);
  len = socket_recv4(s,buf,sizeof(buf),ip,&p);