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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/rbootd/utils.c	Lines:	0	123	0.0 %
Date:	2017-11-13	Branches:	0	50	0.0 %


/*	$OpenBSD: utils.c,v 1.17 2017/01/20 03:47:31 krw Exp $	*/
/*	$NetBSD: utils.c,v 1.5.2.1 1995/11/14 08:45:46 thorpej Exp $	*/

/*
 * 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. 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.
 *
 *	from: @(#)utils.c	8.1 (Berkeley) 6/4/93
 *
 * From: Utah Hdr: utils.c 3.1 92/07/06
 * Author: Jeff Forys, University of Utah CSS
 */

#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include "defs.h"

/*
**  DispPkt -- Display the contents of an RMPCONN packet.
**
**	Parameters:
**		rconn - packet to be displayed.
**		direct - direction packet is going (DIR_*).
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		None.
*/
void
DispPkt(RMPCONN *rconn, int direct)
{
	static const char BootFmt[] =
	    "\t\tRetCode:%u SeqNo:%x SessID:%x Vers:%u";
	static const char ReadFmt[] =
	    "\t\tRetCode:%u Offset:%x SessID:%x\n";
	struct tm *tmp;
	struct rmp_packet *rmp;
	int i;
	u_int32_t t;
	time_t tim;

	/* display direction packet is going using '>>>' or '<<<' */
	fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp);

	/* display packet timestamp */

	tim = rconn->tstamp.tv_sec;
	tmp = localtime(&tim);
	fprintf(DbgFp, "%02d:%02d:%02d.%06ld   ", tmp->tm_hour, tmp->tm_min,
	    tmp->tm_sec, rconn->tstamp.tv_usec);

	/* display src or dst addr and information about network interface */
	fprintf(DbgFp, "Addr: %s   Intf: %s\n", EnetStr(rconn), IntfName);

	rmp = &rconn->rmp;

	/* display IEEE 802.2 Logical Link Control header */
	(void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n",
	    rmp->hp_llc.dsap, rmp->hp_llc.ssap, ntohs(rmp->hp_llc.cntrl));

	/* display HP extensions to 802.2 Logical Link Control header */
	(void) fprintf(DbgFp, "\tHP Ext:    DXSAP:%x SXSAP:%x\n",
	    ntohs(rmp->hp_llc.dxsap), ntohs(rmp->hp_llc.sxsap));

	/*
	 *  Display information about RMP packet using type field to
	 *  determine what kind of packet this is.
	 */
	switch (rmp->r_type) {
	case RMP_BOOT_REQ:		/* boot request */
		(void) fprintf(DbgFp, "\tBoot Request:");
		GETWORD(rmp->r_brq.rmp_seqno, t);
		if (ntohs(rmp->r_brq.rmp_session) == RMP_PROBESID) {
			if (WORDZE(rmp->r_brq.rmp_seqno))
				fputs(" (Send Server ID)", DbgFp);
			else
				fprintf(DbgFp," (Send Filename #%u)",t);
		}
		(void) fputc('\n', DbgFp);
		(void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode,
		    t, ntohs(rmp->r_brq.rmp_session),
		    ntohs(rmp->r_brq.rmp_version));
		(void) fprintf(DbgFp, "\n\t\tMachine Type: ");
		for (i = 0; i < RMP_MACHLEN; i++)
			(void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp);
		DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm);
		break;
	case RMP_BOOT_REPL:		/* boot reply */
		fprintf(DbgFp, "\tBoot Reply:\n");
		GETWORD(rmp->r_brpl.rmp_seqno, t);
		(void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode,
		    t, ntohs(rmp->r_brpl.rmp_session),
		    ntohs(rmp->r_brpl.rmp_version));
		DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm);
		break;
	case RMP_READ_REQ:		/* read request */
		(void) fprintf(DbgFp, "\tRead Request:\n");
		GETWORD(rmp->r_rrq.rmp_offset, t);
		(void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode,
		    t, ntohs(rmp->r_rrq.rmp_session));
		(void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n",
		    ntohs(rmp->r_rrq.rmp_size));
		break;
	case RMP_READ_REPL:		/* read reply */
		(void) fprintf(DbgFp, "\tRead Reply:\n");
		GETWORD(rmp->r_rrpl.rmp_offset, t);
		(void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode,
		    t, ntohs(rmp->r_rrpl.rmp_session));
		(void) fprintf(DbgFp, "\t\tNoOfBytesSent: %ld\n",
		    (long)(rconn->rmplen - RMPREADSIZE(0)));
		break;
	case RMP_BOOT_DONE:		/* boot complete */
		(void) fprintf(DbgFp, "\tBoot Complete:\n");
		(void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n",
		    rmp->r_done.rmp_retcode,
		    ntohs(rmp->r_done.rmp_session));
		break;
	default:			/* ??? */
		(void) fprintf(DbgFp, "\tUnknown Type:(%d)\n",
		    rmp->r_type);
		break;
	}
	(void) fputc('\n', DbgFp);
	(void) fflush(DbgFp);
}


/*
**  GetEtherAddr -- convert an RMP (Ethernet) address into a string.
**
**	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:
**		addr - array of RMP_ADDRLEN bytes.
**
**	Returns:
**		Pointer to static string representation of `addr'.
**
**	Side Effects:
**		None.
**
**	Warnings:
**		- The return value points to a static buffer; it must
**		  be copied if it's to be saved.
*/
char *
GetEtherAddr(u_int8_t *addr)
{
	static char Hex[] = "0123456789abcdef";
	static char etherstr[RMP_ADDRLEN*3];
	int i;
	char *cp;

	/*
	 *  For each byte in `addr', convert it to "<hexchar><hexchar>:".
	 *  The last byte does not get a trailing `:' appended.
	 */
	i = 0;
	cp = etherstr;
	for(;;) {
		*cp++ = Hex[*addr >> 4 & 0xf];
		*cp++ = Hex[*addr++ & 0xf];
		if (++i == RMP_ADDRLEN)
			break;
		*cp++ = ':';
	}
	*cp = '\0';

	return(etherstr);
}


/*
**  DispFlnm -- Print a string of bytes to DbgFp (often, a file name).
**
**	Parameters:
**		size - number of bytes to print.
**		flnm - address of first byte.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- Characters are sent to `DbgFp'.
*/
void
DspFlnm(u_int size, char *flnm)
{
	u_int i;

	(void) fprintf(DbgFp, "\n\t\tFile Name (%u): <", size);
	for (i = 0; i < size; i++)
		(void) fputc(*flnm++, DbgFp);
	(void) fputs(">\n", DbgFp);
}


/*
**  NewClient -- allocate memory for a new CLIENT.
**
**	Parameters:
**		addr - RMP (Ethernet) address of new client.
**
**	Returns:
**		Ptr to new CLIENT or NULL if we ran out of memory.
**
**	Side Effects:
**		- Memory will be malloc'd for the new CLIENT.
**		- If malloc() fails, a log message will be generated.
*/
CLIENT *
NewClient(u_int8_t *addr)
{
	CLIENT *ctmp;

	if ((ctmp = malloc(sizeof(CLIENT))) == NULL) {
		syslog(LOG_ERR, "NewClient: out of memory (%s)",
		    GetEtherAddr(addr));
		return(NULL);
	}

	bzero(ctmp, sizeof(CLIENT));
	bcopy(addr, &ctmp->addr[0], RMP_ADDRLEN);
	return(ctmp);
}

/*
**  FreeClient -- free linked list of Clients.
**
**	Parameters:
**		None.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- All malloc'd memory associated with the linked list of
**		  CLIENTS will be free'd; `Clients' will be set to NULL.
**
**	Warnings:
**		- This routine must be called with SIGHUP blocked.
*/
void
FreeClients(void)
{
	CLIENT *ctmp;

	while (Clients != NULL) {
		ctmp = Clients;
		Clients = Clients->next;
		FreeClient(ctmp);
	}
}

/*
**  NewStr -- allocate memory for a character array.
**
**	Parameters:
**		str - null terminated character array.
**
**	Returns:
**		Ptr to new character array or NULL if we ran out of memory.
**
**	Side Effects:
**		- Memory will be malloc'd for the new character array.
**		- If malloc() fails, a log message will be generated.
*/
char *
NewStr(char *str)
{
	char *stmp;

	stmp = strdup(str);
	if (stmp == NULL) {
		syslog(LOG_ERR, "NewStr: out of memory (%s)", str);
		return(NULL);
	}
	return(stmp);
}

/*
**  To save time, NewConn and FreeConn maintain a cache of one RMPCONN
**  in `LastFree' (defined below).
*/

static RMPCONN *LastFree = NULL;

/*
**  NewConn -- allocate memory for a new RMPCONN connection.
**
**	Parameters:
**		rconn - initialization template for new connection.
**
**	Returns:
**		Ptr to new RMPCONN or NULL if we ran out of memory.
**
**	Side Effects:
**		- Memory may be malloc'd for the new RMPCONN (if not cached).
**		- If malloc() fails, a log message will be generated.
*/
RMPCONN *
NewConn(RMPCONN *rconn)
{
	RMPCONN *rtmp;

	if (LastFree == NULL) {		/* nothing cached; make a new one */
		if ((rtmp = malloc(sizeof(RMPCONN))) == NULL) {
			syslog(LOG_ERR, "NewConn: out of memory (%s)",
			    EnetStr(rconn));
			return(NULL);
		}
	} else {			/* use the cached RMPCONN */
		rtmp = LastFree;
		LastFree = NULL;
	}

	/*
	 *  Copy template into `rtmp', init file descriptor to `-1' and
	 *  set ptr to next elem NULL.
	 */
	bcopy((char *)rconn, (char *)rtmp, sizeof(RMPCONN));
	rtmp->bootfd = -1;
	rtmp->next = NULL;

	return(rtmp);
}

/*
**  FreeConn -- Free memory associated with an RMPCONN connection.
**
**	Parameters:
**		rtmp - ptr to RMPCONN to be free'd.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- Memory associated with `rtmp' may be free'd (or cached).
**		- File desc associated with `rtmp->bootfd' will be closed.
*/
void
FreeConn(RMPCONN *rtmp)
{
	/*
	 *  If the file descriptor is in use, close the file.
	 */
	if (rtmp->bootfd >= 0) {
		(void) close(rtmp->bootfd);
		rtmp->bootfd = -1;
	}

	if (LastFree == NULL)		/* cache for next time */
		rtmp = LastFree;
	else				/* already one cached; free this one */
		free((char *)rtmp);
}

/*
**  FreeConns -- free linked list of RMPCONN connections.
**
**	Parameters:
**		None.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- All malloc'd memory associated with the linked list of
**		  connections will be free'd; `RmpConns' will be set to NULL.
**		- If LastFree is != NULL, it too will be free'd & NULL'd.
**
**	Warnings:
**		- This routine must be called with SIGHUP blocked.
*/
void
FreeConns(void)
{
	RMPCONN *rtmp;

	while (RmpConns != NULL) {
		rtmp = RmpConns;
		RmpConns = RmpConns->next;
		FreeConn(rtmp);
	}

	if (LastFree != NULL) {
		free((char *)LastFree);
		LastFree = NULL;
	}
}

/*
**  AddConn -- Add a connection to the linked list of connections.
**
**	Parameters:
**		rconn - connection to be added.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- RmpConn will point to new connection.
**
**	Warnings:
**		- This routine must be called with SIGHUP blocked.
*/
void
AddConn(RMPCONN *rconn)
{
	if (RmpConns != NULL)
		rconn->next = RmpConns;
	RmpConns = rconn;
}

/*
**  FindConn -- Find a connection in the linked list of connections.
**
**	We use the RMP (Ethernet) address as the basis for determining
**	if this is the same connection.  According to the Remote Maint
**	Protocol, we can only have one connection with any machine.
**
**	Parameters:
**		rconn - connection to be found.
**
**	Returns:
**		Matching connection from linked list or NULL if not found.
**
**	Side Effects:
**		None.
**
**	Warnings:
**		- This routine must be called with SIGHUP blocked.
*/
RMPCONN *
FindConn(RMPCONN *rconn)
{
	RMPCONN *rtmp;

	for (rtmp = RmpConns; rtmp != NULL; rtmp = rtmp->next)
		if (bcmp((char *)&rconn->rmp.hp_hdr.saddr[0],
		    (char *)&rtmp->rmp.hp_hdr.saddr[0], RMP_ADDRLEN) == 0)
			break;

	return(rtmp);
}

/*
**  RemoveConn -- Remove a connection from the linked list of connections.
**
**	Parameters:
**		rconn - connection to be removed.
**
**	Returns:
**		Nothing.
**
**	Side Effects:
**		- If found, an RMPCONN will cease to exist and it will
**		  be removed from the linked list.
**
**	Warnings:
**		- This routine must be called with SIGHUP blocked.
*/
void
RemoveConn(RMPCONN *rconn)
{
	RMPCONN *thisrconn, *lastrconn;

	if (RmpConns == rconn) {		/* easy case */
		RmpConns = RmpConns->next;
		FreeConn(rconn);
	} else {				/* must traverse linked list */
		lastrconn = RmpConns;			/* set back ptr */
		thisrconn = lastrconn->next;		/* set current ptr */
		while (thisrconn != NULL) {
			if (rconn == thisrconn) {		/* found it */
				lastrconn->next = thisrconn->next;
				FreeConn(thisrconn);
				break;
			}
			lastrconn = thisrconn;
			thisrconn = thisrconn->next;
		}
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: utils.c,v 1.17 2017/01/20 03:47:31 krw Exp $ */
2			/* $NetBSD: utils.c,v 1.5.2.1 1995/11/14 08:45:46 thorpej Exp $ */
3
4			/*
5			* Copyright (c) 1988, 1992 The University of Utah and the Center
6			* for Software Science (CSS).
7			* Copyright (c) 1992, 1993
8			* The Regents of the University of California. All rights reserved.
9			*
10			* This code is derived from software contributed to Berkeley by
11			* the Center for Software Science of the University of Utah Computer
12			* Science Department. CSS requests users of this software to return
13			* to css-dist@cs.utah.edu any improvements that they make and grant
14			* CSS redistribution rights.
15			*
16			* Redistribution and use in source and binary forms, with or without
17			* modification, are permitted provided that the following conditions
18			* are met:
19			* 1. Redistributions of source code must retain the above copyright
20			* notice, this list of conditions and the following disclaimer.
21			* 2. Redistributions in binary form must reproduce the above copyright
22			* notice, this list of conditions and the following disclaimer in the
23			* documentation and/or other materials provided with the distribution.
24			* 3. Neither the name of the University nor the names of its contributors
25			* may be used to endorse or promote products derived from this software
26			* without specific prior written permission.
27			*
28			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38			* SUCH DAMAGE.
39			*
40			* from: @(#)utils.c 8.1 (Berkeley) 6/4/93
41			*
42			* From: Utah Hdr: utils.c 3.1 92/07/06
43			* Author: Jeff Forys, University of Utah CSS
44			*/
45
46			#include <sys/time.h>
47			#include <stdio.h>
48			#include <stdlib.h>
49			#include <string.h>
50			#include <syslog.h>
51			#include <time.h>
52			#include <unistd.h>
53			#include "defs.h"
54
55			/*
56			** DispPkt -- Display the contents of an RMPCONN packet.
57			**
58			** Parameters:
59			** rconn - packet to be displayed.
60			** direct - direction packet is going (DIR_*).
61			**
62			** Returns:
63			** Nothing.
64			**
65			** Side Effects:
66			** None.
67			*/
68			void
69			DispPkt(RMPCONN *rconn, int direct)
70			{
71			static const char BootFmt[] =
72			"\t\tRetCode:%u SeqNo:%x SessID:%x Vers:%u";
73			static const char ReadFmt[] =
74			"\t\tRetCode:%u Offset:%x SessID:%x\n";
75			struct tm *tmp;
76			struct rmp_packet *rmp;
77			int i;
78			u_int32_t t;
79			time_t tim;
80
81			/* display direction packet is going using '>>>' or '<<<' */
82			fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp);
83
84			/* display packet timestamp */
85
86			tim = rconn->tstamp.tv_sec;
87			tmp = localtime(&tim);
88			fprintf(DbgFp, "%02d:%02d:%02d.%06ld ", tmp->tm_hour, tmp->tm_min,
89			tmp->tm_sec, rconn->tstamp.tv_usec);
90
91			/* display src or dst addr and information about network interface */
92			fprintf(DbgFp, "Addr: %s Intf: %s\n", EnetStr(rconn), IntfName);
93
94			rmp = &rconn->rmp;
95
96			/* display IEEE 802.2 Logical Link Control header */
97			(void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n",
98			rmp->hp_llc.dsap, rmp->hp_llc.ssap, ntohs(rmp->hp_llc.cntrl));
99
100			/* display HP extensions to 802.2 Logical Link Control header */
101			(void) fprintf(DbgFp, "\tHP Ext: DXSAP:%x SXSAP:%x\n",
102			ntohs(rmp->hp_llc.dxsap), ntohs(rmp->hp_llc.sxsap));
103
104			/*
105			* Display information about RMP packet using type field to
106			* determine what kind of packet this is.
107			*/
108			switch (rmp->r_type) {
109			case RMP_BOOT_REQ: /* boot request */
110			(void) fprintf(DbgFp, "\tBoot Request:");
111			GETWORD(rmp->r_brq.rmp_seqno, t);
112			if (ntohs(rmp->r_brq.rmp_session) == RMP_PROBESID) {
113			if (WORDZE(rmp->r_brq.rmp_seqno))
114			fputs(" (Send Server ID)", DbgFp);
115			else
116			fprintf(DbgFp," (Send Filename #%u)",t);
117			}
118			(void) fputc('\n', DbgFp);
119			(void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode,
120			t, ntohs(rmp->r_brq.rmp_session),
121			ntohs(rmp->r_brq.rmp_version));
122			(void) fprintf(DbgFp, "\n\t\tMachine Type: ");
123			for (i = 0; i < RMP_MACHLEN; i++)
124			(void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp);
125			DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm);
126			break;
127			case RMP_BOOT_REPL: /* boot reply */
128			fprintf(DbgFp, "\tBoot Reply:\n");
129			GETWORD(rmp->r_brpl.rmp_seqno, t);
130			(void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode,
131			t, ntohs(rmp->r_brpl.rmp_session),
132			ntohs(rmp->r_brpl.rmp_version));
133			DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm);
134			break;
135			case RMP_READ_REQ: /* read request */
136			(void) fprintf(DbgFp, "\tRead Request:\n");
137			GETWORD(rmp->r_rrq.rmp_offset, t);
138			(void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode,
139			t, ntohs(rmp->r_rrq.rmp_session));
140			(void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n",
141			ntohs(rmp->r_rrq.rmp_size));
142			break;
143			case RMP_READ_REPL: /* read reply */
144			(void) fprintf(DbgFp, "\tRead Reply:\n");
145			GETWORD(rmp->r_rrpl.rmp_offset, t);
146			(void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode,
147			t, ntohs(rmp->r_rrpl.rmp_session));
148			(void) fprintf(DbgFp, "\t\tNoOfBytesSent: %ld\n",
149			(long)(rconn->rmplen - RMPREADSIZE(0)));
150			break;
151			case RMP_BOOT_DONE: /* boot complete */
152			(void) fprintf(DbgFp, "\tBoot Complete:\n");
153			(void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n",
154			rmp->r_done.rmp_retcode,
155			ntohs(rmp->r_done.rmp_session));
156			break;
157			default: /* ??? */
158			(void) fprintf(DbgFp, "\tUnknown Type:(%d)\n",
159			rmp->r_type);
160			break;
161			}
162			(void) fputc('\n', DbgFp);
163			(void) fflush(DbgFp);
164			}
165
166
167			/*
168			** GetEtherAddr -- convert an RMP (Ethernet) address into a string.
169			**
170			** An RMP BOOT packet has been received. Look at the type field
171			** and process Boot Requests, Read Requests, and Boot Complete
172			** packets. Any other type will be dropped with a warning msg.
173			**
174			** Parameters:
175			** addr - array of RMP_ADDRLEN bytes.
176			**
177			** Returns:
178			** Pointer to static string representation of `addr'.
179			**
180			** Side Effects:
181			** None.
182			**
183			** Warnings:
184			** - The return value points to a static buffer; it must
185			** be copied if it's to be saved.
186			*/
187			char *
188			GetEtherAddr(u_int8_t *addr)
189			{
190			static char Hex[] = "0123456789abcdef";
191			static char etherstr[RMP_ADDRLEN*3];
192			int i;
193			char *cp;
194
195			/*
196			* For each byte in `addr', convert it to "<hexchar><hexchar>:".
197			* The last byte does not get a trailing `:' appended.
198			*/
199			i = 0;
200			cp = etherstr;
201			for(;;) {
202			cp++ = Hex[addr >> 4 & 0xf];
203			cp++ = Hex[addr++ & 0xf];
204			if (++i == RMP_ADDRLEN)
205			break;
206			*cp++ = ':';
207			}
208			*cp = '\0';
209
210			return(etherstr);
211			}
212
213
214			/*
215			** DispFlnm -- Print a string of bytes to DbgFp (often, a file name).
216			**
217			** Parameters:
218			** size - number of bytes to print.
219			** flnm - address of first byte.
220			**
221			** Returns:
222			** Nothing.
223			**
224			** Side Effects:
225			** - Characters are sent to `DbgFp'.
226			*/
227			void
228			DspFlnm(u_int size, char *flnm)
229			{
230			u_int i;
231
232			(void) fprintf(DbgFp, "\n\t\tFile Name (%u): <", size);
233			for (i = 0; i < size; i++)
234			(void) fputc(*flnm++, DbgFp);
235			(void) fputs(">\n", DbgFp);
236			}
237
238
239			/*
240			** NewClient -- allocate memory for a new CLIENT.
241			**
242			** Parameters:
243			** addr - RMP (Ethernet) address of new client.
244			**
245			** Returns:
246			** Ptr to new CLIENT or NULL if we ran out of memory.
247			**
248			** Side Effects:
249			** - Memory will be malloc'd for the new CLIENT.
250			** - If malloc() fails, a log message will be generated.
251			*/
252			CLIENT *
253			NewClient(u_int8_t *addr)
254			{
255			CLIENT *ctmp;
256
257			if ((ctmp = malloc(sizeof(CLIENT))) == NULL) {
258			syslog(LOG_ERR, "NewClient: out of memory (%s)",
259			GetEtherAddr(addr));
260			return(NULL);
261			}
262
263			bzero(ctmp, sizeof(CLIENT));
264			bcopy(addr, &ctmp->addr[0], RMP_ADDRLEN);
265			return(ctmp);
266			}
267
268			/*
269			** FreeClient -- free linked list of Clients.
270			**
271			** Parameters:
272			** None.
273			**
274			** Returns:
275			** Nothing.
276			**
277			** Side Effects:
278			** - All malloc'd memory associated with the linked list of
279			** CLIENTS will be free'd; `Clients' will be set to NULL.
280			**
281			** Warnings:
282			** - This routine must be called with SIGHUP blocked.
283			*/
284			void
285			FreeClients(void)
286			{
287			CLIENT *ctmp;
288
289			while (Clients != NULL) {
290			ctmp = Clients;
291			Clients = Clients->next;
292			FreeClient(ctmp);
293			}
294			}
295
296			/*
297			** NewStr -- allocate memory for a character array.
298			**
299			** Parameters:
300			** str - null terminated character array.
301			**
302			** Returns:
303			** Ptr to new character array or NULL if we ran out of memory.
304			**
305			** Side Effects:
306			** - Memory will be malloc'd for the new character array.
307			** - If malloc() fails, a log message will be generated.
308			*/
309			char *
310			NewStr(char *str)
311			{
312			char *stmp;
313
314			stmp = strdup(str);
315			if (stmp == NULL) {
316			syslog(LOG_ERR, "NewStr: out of memory (%s)", str);
317			return(NULL);
318			}
319			return(stmp);
320			}
321
322			/*
323			** To save time, NewConn and FreeConn maintain a cache of one RMPCONN
324			** in `LastFree' (defined below).
325			*/
326
327			static RMPCONN *LastFree = NULL;
328
329			/*
330			** NewConn -- allocate memory for a new RMPCONN connection.
331			**
332			** Parameters:
333			** rconn - initialization template for new connection.
334			**
335			** Returns:
336			** Ptr to new RMPCONN or NULL if we ran out of memory.
337			**
338			** Side Effects:
339			** - Memory may be malloc'd for the new RMPCONN (if not cached).
340			** - If malloc() fails, a log message will be generated.
341			*/
342			RMPCONN *
343			NewConn(RMPCONN *rconn)
344			{
345			RMPCONN *rtmp;
346
347			if (LastFree == NULL) { /* nothing cached; make a new one */
348			if ((rtmp = malloc(sizeof(RMPCONN))) == NULL) {
349			syslog(LOG_ERR, "NewConn: out of memory (%s)",
350			EnetStr(rconn));
351			return(NULL);
352			}
353			} else { /* use the cached RMPCONN */
354			rtmp = LastFree;
355			LastFree = NULL;
356			}
357
358			/*
359			* Copy template into `rtmp', init file descriptor to `-1' and
360			* set ptr to next elem NULL.
361			*/
362			bcopy((char )rconn, (char )rtmp, sizeof(RMPCONN));
363			rtmp->bootfd = -1;
364			rtmp->next = NULL;
365
366			return(rtmp);
367			}
368
369			/*
370			** FreeConn -- Free memory associated with an RMPCONN connection.
371			**
372			** Parameters:
373			** rtmp - ptr to RMPCONN to be free'd.
374			**
375			** Returns:
376			** Nothing.
377			**
378			** Side Effects:
379			** - Memory associated with `rtmp' may be free'd (or cached).
380			** - File desc associated with `rtmp->bootfd' will be closed.
381			*/
382			void
383			FreeConn(RMPCONN *rtmp)
384			{
385			/*
386			* If the file descriptor is in use, close the file.
387			*/
388			if (rtmp->bootfd >= 0) {
389			(void) close(rtmp->bootfd);
390			rtmp->bootfd = -1;
391			}
392
393			if (LastFree == NULL) /* cache for next time */
394			rtmp = LastFree;
395			else /* already one cached; free this one */
396			free((char *)rtmp);
397			}
398
399			/*
400			** FreeConns -- free linked list of RMPCONN connections.
401			**
402			** Parameters:
403			** None.
404			**
405			** Returns:
406			** Nothing.
407			**
408			** Side Effects:
409			** - All malloc'd memory associated with the linked list of
410			** connections will be free'd; `RmpConns' will be set to NULL.
411			** - If LastFree is != NULL, it too will be free'd & NULL'd.
412			**
413			** Warnings:
414			** - This routine must be called with SIGHUP blocked.
415			*/
416			void
417			FreeConns(void)
418			{
419			RMPCONN *rtmp;
420
421			while (RmpConns != NULL) {
422			rtmp = RmpConns;
423			RmpConns = RmpConns->next;
424			FreeConn(rtmp);
425			}
426
427			if (LastFree != NULL) {
428			free((char *)LastFree);
429			LastFree = NULL;
430			}
431			}
432
433			/*
434			** AddConn -- Add a connection to the linked list of connections.
435			**
436			** Parameters:
437			** rconn - connection to be added.
438			**
439			** Returns:
440			** Nothing.
441			**
442			** Side Effects:
443			** - RmpConn will point to new connection.
444			**
445			** Warnings:
446			** - This routine must be called with SIGHUP blocked.
447			*/
448			void
449			AddConn(RMPCONN *rconn)
450			{
451			if (RmpConns != NULL)
452			rconn->next = RmpConns;
453			RmpConns = rconn;
454			}
455
456			/*
457			** FindConn -- Find a connection in the linked list of connections.
458			**
459			** We use the RMP (Ethernet) address as the basis for determining
460			** if this is the same connection. According to the Remote Maint
461			** Protocol, we can only have one connection with any machine.
462			**
463			** Parameters:
464			** rconn - connection to be found.
465			**
466			** Returns:
467			** Matching connection from linked list or NULL if not found.
468			**
469			** Side Effects:
470			** None.
471			**
472			** Warnings:
473			** - This routine must be called with SIGHUP blocked.
474			*/
475			RMPCONN *
476			FindConn(RMPCONN *rconn)
477			{
478			RMPCONN *rtmp;
479
480			for (rtmp = RmpConns; rtmp != NULL; rtmp = rtmp->next)
481			if (bcmp((char *)&rconn->rmp.hp_hdr.saddr[0],
482			(char *)&rtmp->rmp.hp_hdr.saddr[0], RMP_ADDRLEN) == 0)
483			break;
484
485			return(rtmp);
486			}
487
488			/*
489			** RemoveConn -- Remove a connection from the linked list of connections.
490			**
491			** Parameters:
492			** rconn - connection to be removed.
493			**
494			** Returns:
495			** Nothing.
496			**
497			** Side Effects:
498			** - If found, an RMPCONN will cease to exist and it will
499			** be removed from the linked list.
500			**
501			** Warnings:
502			** - This routine must be called with SIGHUP blocked.
503			*/
504			void
505			RemoveConn(RMPCONN *rconn)
506			{
507			RMPCONN thisrconn, lastrconn;
508
509			if (RmpConns == rconn) { /* easy case */
510			RmpConns = RmpConns->next;
511			FreeConn(rconn);
512			} else { /* must traverse linked list */
513			lastrconn = RmpConns; /* set back ptr */
514			thisrconn = lastrconn->next; /* set current ptr */
515			while (thisrconn != NULL) {
516			if (rconn == thisrconn) { /* found it */
517			lastrconn->next = thisrconn->next;
518			FreeConn(thisrconn);
519			break;
520			}
521			lastrconn = thisrconn;
522			thisrconn = thisrconn->next;
523			}
524			}
525			}