#include	"sntp.h"voidbind_ubcast(struct sockaddr *sabind, socklen_t salen, int port,			int alias, int bcast){	int		i, fd;		/* 4first see if we've already bound this address */	for (i = 0; i < naddrs; i++) {		if (sock_cmp_addr(addrs[i].addr_sa, sabind, salen) == 0)			return;	}	fd = Socket(sabind->sa_family, SOCK_DGRAM, 0);	sock_set_port(sabind, salen, port);	Setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));	printf("binding %s\n", Sock_ntop(sabind, salen));	if (bind(fd, sabind, salen) < 0) {		if (errno == EADDRINUSE) {			printf("  (address already in use)\n");			close(fd);			return;		} else			err_sys("bind error");	}	addrs[naddrs].addr_sa = sabind;	/* save ptr to sockaddr{} */	addrs[naddrs].addr_salen = salen;	addrs[naddrs].addr_fd = fd;	if (bcast)		addrs[naddrs].addr_flags = ADDR_BCAST;	naddrs++;}