//
// UDP Client Connect
//

#include "netlib.h"

int udp_client( const char *host, const char *service )
{
  int     sock;       /* tcp socket */
  struct addrinfo     hints, *res, *ressave;
  
  /* default IPv6 localhost */
  if ( !host || !strlen(host) )
    host = "ip6-localhost";
  
  /* get address information */   
  bzero(&hints, sizeof(struct addrinfo));
  hints.ai_family = AF_UNSPEC;
  hints.ai_socktype = SOCK_DGRAM;
  if ( getaddrinfo(host, service, &hints, &res) )
  {
    log_error("getaddrinfo");
    return -1;
  }
  ressave = res;
  
  while (res)
  {
    sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
    if (sock < 0)
      continue;   // ignore
      
      // connected (allows send()/write() to be used)
      if ( connect(sock, res->ai_addr, res->ai_addrlen) == 0 )
        break;      // success
        
        // next    
        close(sock);
      res = res->ai_next;
  }
  
  if ( !res )
  {
    log_error("udp_client");
    return -1;
  }
  
  freeaddrinfo(ressave);
  
  return sock;
}