/* * Copyright (c) 1988, 1992 The University of Utah and the Center *	for Software Science (CSS). * Copyright (c) 1992, 1993 *	The Regents of the University of California.  All rights reserved. * * This code is derived from software contributed to Berkeley by * the Center for Software Science of the University of Utah Computer * Science Department.  CSS requests users of this software to return * to css-dist@cs.utah.edu any improvements that they make and grant * CSS redistribution rights. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *	@(#)rmpproto.c	8.1 (Berkeley) 6/4/93 * * Utah $Hdr: rmpproto.c 3.1 92/07/06$ * Author: Jeff Forys, University of Utah CSS */#ifndef lintstatic char sccsid[] = "@(#)rmpproto.c	8.1 (Berkeley) 6/4/93";#endif /* not lint */#include <sys/param.h>#include <sys/time.h>#include <errno.h>#include <fcntl.h>#include <stdio.h>#include <string.h>#include <syslog.h>#include <unistd.h>#include "defs.h"/***  ProcessPacket -- determine packet type and do what's required.****	An RMP BOOT packet has been received.  Look at the type field**	and process Boot Requests, Read Requests, and Boot Complete**	packets.  Any other type will be dropped with a warning msg.****	Parameters:**		rconn - the new connection**		client - list of files available to this host****	Returns:**		Nothing.****	Side Effects:**		- If this is a valid boot request, it will be added to**		  the linked list of outstanding requests (RmpConns).**		- If this is a valid boot complete, its associated**		  entry in RmpConns will be deleted.**		- Also, unless we run out of memory, a reply will be**		  sent to the host that sent the packet.*/voidProcessPacket(rconn, client)	RMPCONN *rconn;	CLIENT *client;{	struct rmp_packet *rmp;	RMPCONN *rconnout;	rmp = &rconn->rmp;		/* cache pointer to RMP packet */	switch(rmp->r_type) {		/* do what we came here to do */		case RMP_BOOT_REQ:		/* boot request */			if ((rconnout = NewConn(rconn)) == NULL)				return;			/*			 *  If the Session ID is 0xffff, this is a "probe"			 *  packet and we do not want to add the connection			 *  to the linked list of active connections.  There			 *  are two types of probe packets, if the Sequence			 *  Number is 0 they want to know our host name, o/w			 *  they want the name of the file associated with			 *  the number spec'd by the Sequence Number.			 *			 *  If this is an actual boot request, open the file			 *  and send a reply.  If SendBootRepl() does not			 *  return 0, add the connection to the linked list			 *  of active connections, otherwise delete it since			 *  an error was encountered.			 */			if (rmp->r_brq.rmp_session == RMP_PROBESID) {				if (WORDZE(rmp->r_brq.rmp_seqno))					(void) SendServerID(rconnout);				else					(void) SendFileNo(rmp, rconnout,					                  client? client->files:					                          BootFiles);				FreeConn(rconnout);			} else {				if (SendBootRepl(rmp, rconnout,				    client? client->files: BootFiles))					AddConn(rconnout);				else					FreeConn(rconnout);			}			break;		case RMP_BOOT_REPL:		/* boot reply (not valid) */			syslog(LOG_WARNING, "%s: sent a boot reply",			       EnetStr(rconn));			break;		case RMP_READ_REQ:		/* read request */			/*			 *  Send a portion of the boot file.			 */			(void) SendReadRepl(rconn);			break;		case RMP_READ_REPL:		/* read reply (not valid) */			syslog(LOG_WARNING, "%s: sent a read reply",			       EnetStr(rconn));			break;		case RMP_BOOT_DONE:		/* boot complete */			/*			 *  Remove the entry from the linked list of active			 *  connections.			 */			(void) BootDone(rconn);			break;		default:			/* unknown RMP packet type */			syslog(LOG_WARNING, "%s: unknown packet type (%u)",			       EnetStr(rconn), rmp->r_type);	}}/***  SendServerID -- send our host name to who ever requested it.****	Parameters:**		rconn - the reply packet to be formatted.****	Returns:**		1 on success, 0 on failure.****	Side Effects:**		none.*/intSendServerID(rconn)	RMPCONN *rconn;{	register struct rmp_packet *rpl;	register char *src, *dst;	register u_char *size;	rpl = &rconn->rmp;			/* cache ptr to RMP packet */	/*	 *  Set up assorted fields in reply packet.	 */	rpl->r_brpl.rmp_type = RMP_BOOT_REPL;	rpl->r_brpl.rmp_retcode = RMP_E_OKAY;	ZEROWORD(rpl->r_brpl.rmp_seqno);	rpl->r_brpl.rmp_session = 0;	rpl->r_brpl.rmp_version = RMP_VERSION;	size = &rpl->r_brpl.rmp_flnmsize;	/* ptr to length of host name */	/*	 *  Copy our host name into the reply packet incrementing the	 *  length as we go.  Stop at RMP_HOSTLEN or the first dot.	 */	src = MyHost;	dst = (char *) &rpl->r_brpl.rmp_flnm;	for (*size = 0; *size < RMP_HOSTLEN; (*size)++) {		if (*src == '.' || *src == '\0')			break;		*dst++ = *src++;	}	rconn->rmplen = RMPBOOTSIZE(*size);	/* set packet length */	return(SendPacket(rconn));		/* send packet */}/***  SendFileNo -- send the name of a bootable file to the requester.****	Parameters:**		req - RMP BOOT packet containing the request.**		rconn - the reply packet to be formatted.**		filelist - list of files available to the requester.****	Returns:**		1 on success, 0 on failure.****	Side Effects:**		none.*/intSendFileNo(req, rconn, filelist)	struct rmp_packet *req;	RMPCONN *rconn;	char *filelist[];{	register struct rmp_packet *rpl;	register char *src, *dst;	register u_char *size, i;	GETWORD(req->r_brpl.rmp_seqno, i);	/* SeqNo is really FileNo */	rpl = &rconn->rmp;			/* cache ptr to RMP packet */	/*	 *  Set up assorted fields in reply packet.	 */	rpl->r_brpl.rmp_type = RMP_BOOT_REPL;	PUTWORD(i, rpl->r_brpl.rmp_seqno);	i--;	rpl->r_brpl.rmp_session = 0;	rpl->r_brpl.rmp_version = RMP_VERSION;	size = &rpl->r_brpl.rmp_flnmsize;	/* ptr to length of filename */	*size = 0;				/* init length to zero */	/*	 *  Copy the file name into the reply packet incrementing the	 *  length as we go.  Stop at end of string or when RMPBOOTDATA	 *  characters have been copied.  Also, set return code to	 *  indicate success or "no more files".	 */	if (i < C_MAXFILE && filelist[i] != NULL) {		src = filelist[i];		dst = (char *)&rpl->r_brpl.rmp_flnm;		for (; *src && *size < RMPBOOTDATA; (*size)++) {			if (*src == '\0')				break;			*dst++ = *src++;		}		rpl->r_brpl.rmp_retcode = RMP_E_OKAY;	} else		rpl->r_brpl.rmp_retcode = RMP_E_NODFLT;	rconn->rmplen = RMPBOOTSIZE(*size);	/* set packet length */	return(SendPacket(rconn));		/* send packet */}/***  SendBootRepl -- open boot file and respond to boot request.****	Parameters:**		req - RMP BOOT packet containing the request.**		rconn - the reply packet to be formatted.**		filelist - list of files available to the requester.****	Returns:**		1 on success, 0 on failure.****	Side Effects:**		none.*/intSendBootRepl(req, rconn, filelist)	struct rmp_packet *req;	RMPCONN *rconn;	char *filelist[];{	int retval;	char *filename, filepath[RMPBOOTDATA+1];	RMPCONN *oldconn;	register struct rmp_packet *rpl;