Shin'ichiro TAYA <taya@sm.sony.co.jp> typed:
:Following program failes because there are garbages in in.sin_zero.
:Should I clear in.sin_zero? Is it documented somewhere?

Just remember to clear the struct (see memset() below) before using
it (or manually set all the members).  I thought it was mentioned
in some manual page but can't find it at the moment.

:Or is it a bug of library or kernel?

It's existed on NetBSD this way for a few years - don't know about
other OS's.

Regards,
Geoff

:#include	<stdio.h>
:#include	<sys/types.h>
:#include	<sys/socket.h>
:#include	<netinet/in.h>
:
:main()
:{
:	int	s;
:	struct sockaddr_in	in;
:
:	if((s = socket(PF_INET, SOCK_STREAM, 0)) < 0){
:		perror("socket");
:		exit(1);
:	}

	memset(&in, 0, sizeof(in));

:	in.sin_len = sizeof(in);
:	in.sin_family = AF_INET;
:	in.sin_port = 0;
:	in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
:
:	if(bind(s, (struct sockaddr *)&in, sizeof(in))){
:		perror("bind");
:		exit(1);
:	}
:}