#include	"icmpd.h"intreadable_listen(void){	int			i, connfd;	socklen_t	clilen;	clilen = addrlen;	connfd = Accept(listenfd, cliaddr, &clilen);		/* 4find first available client[] structure */	for (i = 0; i < FD_SETSIZE; i++)		if (client[i].connfd < 0) {			client[i].connfd = connfd;	/* save descriptor */			break;		}	if (i == FD_SETSIZE)		err_quit("too many clients");	printf("new connection, i = %d, connfd = %d\n", i, connfd);	FD_SET(connfd, &allset);	/* add new descriptor to set */	if (connfd > maxfd)		maxfd = connfd;			/* for select() */	if (i > maxi)		maxi = i;				/* max index in client[] array */	return(--nready);}