head     1.1;branch   ;access   ;symbols  ;locks    ;comment  @ * @;1.1date     94.01.17.14.59.31;  author rstevens;  state Exp;branches ;next     ;desc@@1.1log@08Dec93 version for tcpipi@text@/* * Copyright (c) 1993 W. Richard Stevens.  All rights reserved. * Permission to use or modify this software and its documentation only for * educational purposes and without fee is hereby granted, provided that * the above copyright notice appear in all copies.  The author makes no * representations about the suitability of this software for any purpose. * It is provided "as is" without express or implied warranty. */#include	"sock.h"voidsockopts(int sockfd, int doall){    int 			option, optlen;	struct linger	ling;	/* "doall" is 0 for a server's listening socket (i.e., before	   accept() has returned.)  Some socket options such as SO_KEEPALIVE	   don't make sense at this point, while others like SO_DEBUG do. */    if (debug) {        option = 1;        if (setsockopt(sockfd, SOL_SOCKET, SO_DEBUG,								(char *) &option, sizeof(option)) < 0)            err_sys("SO_DEBUG setsockopt error");        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, SOL_SOCKET, SO_DEBUG,								(char *) &option, &optlen) < 0)            err_sys("SO_DEBUG getsockopt error");		if (option == 0)			err_quit("SO_DEBUG not set (%d)", option);		if (verbose)			fprintf(stderr, "SO_DEBUG set\n");    }    if (broadcast && doall) {        option = 1;        if (setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST,								(char *) &option, sizeof(option)) < 0)            err_sys("SO_BROADCAST setsockopt error");        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, SOL_SOCKET, SO_BROADCAST,								(char *) &option, &optlen) < 0)            err_sys("SO_BROADCAST getsockopt error");		if (option == 0)			err_quit("SO_BROADCAST not set (%d)", option);		if (verbose)			fprintf(stderr, "SO_BROADCAST set\n");    }    if (keepalive && doall && udp == 0) {        option = 1;        if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,								(char *) &option, sizeof(option)) < 0)            err_sys("SO_KEEPALIVE setsockopt error");        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,								(char *) &option, &optlen) < 0)            err_sys("SO_KEEPALIVE getsockopt error");		if (option == 0)			err_quit("SO_KEEPALIVE not set (%d)", option);		if (verbose)			fprintf(stderr, "SO_KEEPALIVE set\n");    }    if (nodelay && doall && udp == 0) {        option = 1;        if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,								(char *) &option, sizeof(option)) < 0)            err_sys("TCP_NODELAY setsockopt error");        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,								(char *) &option, &optlen) < 0)            err_sys("TCP_NODELAY getsockopt error");		if (option == 0)			err_quit("TCP_NODELAY not set (%d)", option);		if (verbose)			fprintf(stderr, "TCP_NODELAY set\n");    }    if (doall && verbose && udp == 0) {	/* just print MSS if verbose */        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, IPPROTO_TCP, TCP_MAXSEG,								(char *) &option, &optlen) < 0)            err_sys("TCP_MAXSEG getsockopt error");		fprintf(stderr, "TCP_MAXSEG = %d\n", option);    }    if (linger >= 0 && doall && udp == 0) {        ling.l_onoff = 1;        ling.l_linger = linger;		/* 0 for abortive disconnect */        if (setsockopt(sockfd, SOL_SOCKET, SO_LINGER,								(char *) &ling, sizeof(ling)) < 0)            err_sys("SO_LINGER setsockopt error");		ling.l_onoff = 0;		ling.l_linger = -1;        optlen = sizeof(struct linger);        if (getsockopt(sockfd, SOL_SOCKET, SO_LINGER,								(char *) &ling, &optlen) < 0)            err_sys("SO_LINGER getsockopt error");		if (ling.l_onoff == 0 || ling.l_linger != linger)			err_quit("SO_LINGER not set (%d, %d)", ling.l_onoff, ling.l_linger);        if (verbose)            fprintf(stderr, "linger %s, time = %d\n",                            ling.l_onoff ? "on" : "off", ling.l_linger);    }    if (recvdstaddr && udp) {#ifdef	IP_RECVDSTADDR        option = 1;        if (setsockopt(sockfd, IPPROTO_IP, IP_RECVDSTADDR,								(char *) &option, sizeof(option)) < 0)            err_sys("IP_RECVDSTADDR setsockopt error");        option = 0;		optlen = sizeof(option);        if (getsockopt(sockfd, IPPROTO_IP, IP_RECVDSTADDR,								(char *) &option, &optlen) < 0)            err_sys("IP_RECVDSTADDR getsockopt error");		if (option == 0)			err_quit("IP_RECVDSTADDR not set (%d)", option);		if (verbose)			fprintf(stderr, "IP_RECVDSTADDR set\n");#else		fprintf(stderr, "warning: IP_RECVDSTADDR not supported by host\n");#endif    }}@