TCP is shit

If you're so lazy that you have to rely on a lower level protocol for reliability, rather than implementing your own reliability features at the application layer, it's time to stop programming.

Network programming sucks, especially on Win32 and UNIX.

On UNIX:
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
  ...
struct sockaddr_in sock_in;
struct servent *sp;
struct hostent *host;
  ...
memset(&sock_in, 0, sizeof (sock_in));
sock_in.sin_family = AF_INET;
f = socket(AF_INET, SOCK_STREAM, 0);
if (f < 0)
  error("socket");
if (bind(f, (struct sockaddr*)&sock_in, sizeof sock_in) < 0){
  error("bind");
host = gethostbyname(argv[1]);
if(host){
  sock_in.sin_family = host->h_addrtype;
  memmove(&sock_in.sin_addr, host->h_addr, host->h_length);
}else{
  sock_in.sin_family = AF_INET;
  sock_in.sin_addr.s_addr = inet_addr(argv[1]);
  if (sock_in.sin_addr.s_addr == -1)
    error("unknown host %s", argv[1]);
}
sp = getservbyname("discard", "tcp");
if (sp)
  sock_in.sin_port = sp->s_port;
else
  sock_in.sin_port = htons(9);
if (connect(f, (struct sockaddr*)&sock_in, sizeof sock_in) < 0){
  error("connect:");

On Plan 9:
#include <u.h>
#include <libc.h>
...
fd = dial(netmkaddr(argv[1], "tcp", "discard"), 0, 0, 0);
if(fd < 0)
  sysfatal("can't dial %s: %r", argv[1]);