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- /*
- * 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.
- *
- * 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
- */
-
- #ifndef lint
- #if 0
- static const char sccsid[] = "@(#)utils.c 8.1 (Berkeley) 6/4/93";
- #endif
- static const char rcsid[] =
- "$Id: utils.c,v 1.4 1997/11/24 07:33:42 charnier Exp $";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/time.h>
-
- #include <fcntl.h>
- #include <signal.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(rconn, direct)
- RMPCONN *rconn;
- int direct;
- {
- static char BootFmt[] = "\t\tRetCode:%u SeqNo:%lx SessID:%x Vers:%u";
- static char ReadFmt[] = "\t\tRetCode:%u Offset:%lx SessID:%x\n";
-
- struct tm *tmp;
- struct rmp_packet *rmp;
- int i, omask;
- u_int32_t t;
-
- /*
- * Since we will be working with RmpConns as well as DbgFp, we
- * must block signals that can affect either.
- */
- omask = sigblock(sigmask(SIGHUP)|sigmask(SIGUSR1)|sigmask(SIGUSR2));
-
- if (DbgFp == NULL) { /* sanity */
- (void) sigsetmask(omask);
- return;
- }
-
- /* display direction packet is going using '>>>' or '<<<' */
- fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp);
-
- /* display packet timestamp */
- tmp = localtime((time_t *)&rconn->tstamp.tv_sec);
- 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: %d\n",
- 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);
- }
- (void) fputc('\n', DbgFp);
- (void) fflush(DbgFp);
-
- (void) sigsetmask(omask); /* reset old signal mask */
- }
-
-
- /*
- ** 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(addr)
- 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(size, flnm)
- u_int size;
- char *flnm;
- {
- 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(addr)
- u_int8_t *addr;
- {
- CLIENT *ctmp;
-
- if ((ctmp = (CLIENT *) malloc(sizeof(CLIENT))) == NULL) {
- syslog(LOG_ERR, "NewClient: out of memory (%s)",
- GetEtherAddr(addr));
- return(NULL);
- }
-
- memset(ctmp, 0, sizeof(CLIENT));
- memmove(&ctmp->addr[0], addr, 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()
- {
- 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(str)
- char *str;
- {
- char *stmp;
-
- if ((stmp = (char *)malloc((unsigned) (strlen(str)+1))) == NULL) {
- syslog(LOG_ERR, "NewStr: out of memory (%s)", str);
- return(NULL);
- }
-
- (void) strcpy(stmp, str);
- 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(rconn)
- RMPCONN *rconn;
- {
- RMPCONN *rtmp;
-
- if (LastFree == NULL) { /* nothing cached; make a new one */
- if ((rtmp = (RMPCONN *) 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.
- */
- memmove((char *)rtmp, (char *)rconn, 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(rtmp)
- 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()
- {
- 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(rconn)
- 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(rconn)
- 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(rconn)
- 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;
- }
- }
- }
-