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547 lines
14 KiB
C
547 lines
14 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988, 1992 The University of Utah and the Center
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* for Software Science (CSS).
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Center for Software Science of the University of Utah Computer
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* Science Department. CSS requests users of this software to return
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* to css-dist@cs.utah.edu any improvements that they make and grant
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* CSS redistribution rights.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)utils.c 8.1 (Berkeley) 6/4/93
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*
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* From: Utah Hdr: utils.c 3.1 92/07/06
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* Author: Jeff Forys, University of Utah CSS
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*/
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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)utils.c 8.1 (Berkeley) 6/4/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#include "defs.h"
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/*
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** DispPkt -- Display the contents of an RMPCONN packet.
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**
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** Parameters:
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** rconn - packet to be displayed.
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** direct - direction packet is going (DIR_*).
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** None.
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*/
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void
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DispPkt(RMPCONN *rconn, int direct)
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{
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static const char BootFmt[] = "\t\tRetCode:%u SeqNo:%x SessID:%x Vers:%u";
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static const char ReadFmt[] = "\t\tRetCode:%u Offset:%x SessID:%x\n";
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struct tm *tmp;
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struct rmp_packet *rmp;
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int i, omask;
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u_int32_t t;
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/*
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* Since we will be working with RmpConns as well as DbgFp, we
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* must block signals that can affect either.
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*/
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omask = sigblock(sigmask(SIGHUP)|sigmask(SIGUSR1)|sigmask(SIGUSR2));
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if (DbgFp == NULL) { /* sanity */
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(void) sigsetmask(omask);
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return;
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}
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/* display direction packet is going using '>>>' or '<<<' */
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fputs((direct==DIR_RCVD)?"<<< ":(direct==DIR_SENT)?">>> ":"", DbgFp);
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/* display packet timestamp */
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tmp = localtime((time_t *)&rconn->tstamp.tv_sec);
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fprintf(DbgFp, "%02d:%02d:%02d.%06ld ", tmp->tm_hour, tmp->tm_min,
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tmp->tm_sec, rconn->tstamp.tv_usec);
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/* display src or dst addr and information about network interface */
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fprintf(DbgFp, "Addr: %s Intf: %s\n", EnetStr(rconn), IntfName);
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rmp = &rconn->rmp;
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/* display IEEE 802.2 Logical Link Control header */
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(void) fprintf(DbgFp, "\t802.2 LLC: DSAP:%x SSAP:%x CTRL:%x\n",
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rmp->hp_llc.dsap, rmp->hp_llc.ssap, ntohs(rmp->hp_llc.cntrl));
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/* display HP extensions to 802.2 Logical Link Control header */
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(void) fprintf(DbgFp, "\tHP Ext: DXSAP:%x SXSAP:%x\n",
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ntohs(rmp->hp_llc.dxsap), ntohs(rmp->hp_llc.sxsap));
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/*
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* Display information about RMP packet using type field to
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* determine what kind of packet this is.
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*/
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switch(rmp->r_type) {
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case RMP_BOOT_REQ: /* boot request */
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(void) fprintf(DbgFp, "\tBoot Request:");
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GETWORD(rmp->r_brq.rmp_seqno, t);
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if (ntohs(rmp->r_brq.rmp_session) == RMP_PROBESID) {
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if (WORDZE(rmp->r_brq.rmp_seqno))
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fputs(" (Send Server ID)", DbgFp);
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else
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fprintf(DbgFp," (Send Filename #%u)",t);
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}
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(void) fputc('\n', DbgFp);
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(void) fprintf(DbgFp, BootFmt, rmp->r_brq.rmp_retcode,
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t, ntohs(rmp->r_brq.rmp_session),
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ntohs(rmp->r_brq.rmp_version));
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(void) fprintf(DbgFp, "\n\t\tMachine Type: ");
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for (i = 0; i < RMP_MACHLEN; i++)
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(void) fputc(rmp->r_brq.rmp_machtype[i], DbgFp);
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DspFlnm(rmp->r_brq.rmp_flnmsize, &rmp->r_brq.rmp_flnm);
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break;
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case RMP_BOOT_REPL: /* boot reply */
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fprintf(DbgFp, "\tBoot Reply:\n");
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GETWORD(rmp->r_brpl.rmp_seqno, t);
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(void) fprintf(DbgFp, BootFmt, rmp->r_brpl.rmp_retcode,
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t, ntohs(rmp->r_brpl.rmp_session),
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ntohs(rmp->r_brpl.rmp_version));
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DspFlnm(rmp->r_brpl.rmp_flnmsize,&rmp->r_brpl.rmp_flnm);
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break;
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case RMP_READ_REQ: /* read request */
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(void) fprintf(DbgFp, "\tRead Request:\n");
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GETWORD(rmp->r_rrq.rmp_offset, t);
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(void) fprintf(DbgFp, ReadFmt, rmp->r_rrq.rmp_retcode,
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t, ntohs(rmp->r_rrq.rmp_session));
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(void) fprintf(DbgFp, "\t\tNoOfBytes: %u\n",
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ntohs(rmp->r_rrq.rmp_size));
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break;
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case RMP_READ_REPL: /* read reply */
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(void) fprintf(DbgFp, "\tRead Reply:\n");
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GETWORD(rmp->r_rrpl.rmp_offset, t);
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(void) fprintf(DbgFp, ReadFmt, rmp->r_rrpl.rmp_retcode,
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t, ntohs(rmp->r_rrpl.rmp_session));
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(void) fprintf(DbgFp, "\t\tNoOfBytesSent: %zu\n",
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rconn->rmplen - RMPREADSIZE(0));
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break;
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case RMP_BOOT_DONE: /* boot complete */
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(void) fprintf(DbgFp, "\tBoot Complete:\n");
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(void) fprintf(DbgFp, "\t\tRetCode:%u SessID:%x\n",
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rmp->r_done.rmp_retcode,
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ntohs(rmp->r_done.rmp_session));
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break;
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default: /* ??? */
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(void) fprintf(DbgFp, "\tUnknown Type:(%d)\n",
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rmp->r_type);
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}
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(void) fputc('\n', DbgFp);
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(void) fflush(DbgFp);
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(void) sigsetmask(omask); /* reset old signal mask */
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}
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/*
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** GetEtherAddr -- convert an RMP (Ethernet) address into a string.
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**
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** An RMP BOOT packet has been received. Look at the type field
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** and process Boot Requests, Read Requests, and Boot Complete
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** packets. Any other type will be dropped with a warning msg.
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**
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** Parameters:
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** addr - array of RMP_ADDRLEN bytes.
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**
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** Returns:
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** Pointer to static string representation of `addr'.
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**
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** Side Effects:
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** None.
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**
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** Warnings:
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** - The return value points to a static buffer; it must
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** be copied if it's to be saved.
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*/
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char *
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GetEtherAddr(u_int8_t *addr)
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{
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static char Hex[] = "0123456789abcdef";
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static char etherstr[RMP_ADDRLEN*3];
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int i;
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char *cp;
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/*
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* For each byte in `addr', convert it to "<hexchar><hexchar>:".
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* The last byte does not get a trailing `:' appended.
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*/
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i = 0;
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cp = etherstr;
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for(;;) {
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*cp++ = Hex[*addr >> 4 & 0xf];
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*cp++ = Hex[*addr++ & 0xf];
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if (++i == RMP_ADDRLEN)
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break;
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*cp++ = ':';
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}
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*cp = '\0';
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return(etherstr);
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}
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/*
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** DispFlnm -- Print a string of bytes to DbgFp (often, a file name).
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**
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** Parameters:
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** size - number of bytes to print.
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** flnm - address of first byte.
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** - Characters are sent to `DbgFp'.
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*/
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void
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DspFlnm(u_int size, char *flnm)
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{
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int i;
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(void) fprintf(DbgFp, "\n\t\tFile Name (%u): <", size);
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for (i = 0; i < size; i++)
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(void) fputc(*flnm++, DbgFp);
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(void) fputs(">\n", DbgFp);
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}
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/*
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** NewClient -- allocate memory for a new CLIENT.
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**
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** Parameters:
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** addr - RMP (Ethernet) address of new client.
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**
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** Returns:
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** Ptr to new CLIENT or NULL if we ran out of memory.
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**
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** Side Effects:
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** - Memory will be malloc'd for the new CLIENT.
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** - If malloc() fails, a log message will be generated.
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*/
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CLIENT *
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NewClient(u_int8_t *addr)
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{
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CLIENT *ctmp;
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if ((ctmp = (CLIENT *) malloc(sizeof(CLIENT))) == NULL) {
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syslog(LOG_ERR, "NewClient: out of memory (%s)",
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GetEtherAddr(addr));
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return(NULL);
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}
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memset(ctmp, 0, sizeof(CLIENT));
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memmove(&ctmp->addr[0], addr, RMP_ADDRLEN);
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return(ctmp);
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}
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/*
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** FreeClient -- free linked list of Clients.
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**
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** Parameters:
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** None.
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** - All malloc'd memory associated with the linked list of
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** CLIENTS will be free'd; `Clients' will be set to NULL.
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**
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** Warnings:
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** - This routine must be called with SIGHUP blocked.
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*/
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void
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FreeClients(void)
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{
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CLIENT *ctmp;
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while (Clients != NULL) {
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ctmp = Clients;
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Clients = Clients->next;
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FreeClient(ctmp);
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}
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}
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/*
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** NewStr -- allocate memory for a character array.
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**
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** Parameters:
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** str - null terminated character array.
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**
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** Returns:
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** Ptr to new character array or NULL if we ran out of memory.
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**
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** Side Effects:
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** - Memory will be malloc'd for the new character array.
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** - If malloc() fails, a log message will be generated.
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*/
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char *
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NewStr(char *str)
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{
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char *stmp;
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if ((stmp = (char *)malloc((unsigned) (strlen(str)+1))) == NULL) {
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syslog(LOG_ERR, "NewStr: out of memory (%s)", str);
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return(NULL);
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}
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(void) strcpy(stmp, str);
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return(stmp);
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}
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/*
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** To save time, NewConn and FreeConn maintain a cache of one RMPCONN
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** in `LastFree' (defined below).
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*/
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static RMPCONN *LastFree = NULL;
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/*
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** NewConn -- allocate memory for a new RMPCONN connection.
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**
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** Parameters:
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** rconn - initialization template for new connection.
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**
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** Returns:
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** Ptr to new RMPCONN or NULL if we ran out of memory.
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**
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** Side Effects:
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** - Memory may be malloc'd for the new RMPCONN (if not cached).
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** - If malloc() fails, a log message will be generated.
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*/
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RMPCONN *
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NewConn(RMPCONN *rconn)
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{
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RMPCONN *rtmp;
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if (LastFree == NULL) { /* nothing cached; make a new one */
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if ((rtmp = (RMPCONN *) malloc(sizeof(RMPCONN))) == NULL) {
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syslog(LOG_ERR, "NewConn: out of memory (%s)",
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EnetStr(rconn));
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return(NULL);
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}
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} else { /* use the cached RMPCONN */
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rtmp = LastFree;
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LastFree = NULL;
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}
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/*
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* Copy template into `rtmp', init file descriptor to `-1' and
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* set ptr to next elem NULL.
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*/
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memmove((char *)rtmp, (char *)rconn, sizeof(RMPCONN));
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rtmp->bootfd = -1;
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rtmp->next = NULL;
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return(rtmp);
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}
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/*
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** FreeConn -- Free memory associated with an RMPCONN connection.
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**
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** Parameters:
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** rtmp - ptr to RMPCONN to be free'd.
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** - Memory associated with `rtmp' may be free'd (or cached).
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** - File desc associated with `rtmp->bootfd' will be closed.
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*/
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void
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FreeConn(RMPCONN *rtmp)
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{
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/*
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* If the file descriptor is in use, close the file.
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*/
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if (rtmp->bootfd >= 0) {
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(void) close(rtmp->bootfd);
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rtmp->bootfd = -1;
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}
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if (LastFree == NULL) /* cache for next time */
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rtmp = LastFree;
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else /* already one cached; free this one */
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free((char *)rtmp);
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}
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/*
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** FreeConns -- free linked list of RMPCONN connections.
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**
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** Parameters:
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** None.
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** - All malloc'd memory associated with the linked list of
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** connections will be free'd; `RmpConns' will be set to NULL.
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** - If LastFree is != NULL, it too will be free'd & NULL'd.
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**
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** Warnings:
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** - This routine must be called with SIGHUP blocked.
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*/
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void
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FreeConns(void)
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{
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RMPCONN *rtmp;
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while (RmpConns != NULL) {
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rtmp = RmpConns;
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RmpConns = RmpConns->next;
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FreeConn(rtmp);
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}
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if (LastFree != NULL) {
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free((char *)LastFree);
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LastFree = NULL;
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}
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}
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/*
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** AddConn -- Add a connection to the linked list of connections.
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**
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** Parameters:
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** rconn - connection to be added.
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**
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** Returns:
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** Nothing.
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**
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** Side Effects:
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** - RmpConn will point to new connection.
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**
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** Warnings:
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** - This routine must be called with SIGHUP blocked.
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*/
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void
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AddConn(RMPCONN *rconn)
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{
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if (RmpConns != NULL)
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rconn->next = RmpConns;
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RmpConns = rconn;
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}
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/*
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** FindConn -- Find a connection in the linked list of connections.
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**
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** We use the RMP (Ethernet) address as the basis for determining
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** if this is the same connection. According to the Remote Maint
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** Protocol, we can only have one connection with any machine.
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**
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** Parameters:
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** rconn - connection to be found.
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**
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** Returns:
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** Matching connection from linked list or NULL if not found.
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**
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** Side Effects:
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** None.
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**
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** Warnings:
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** - This routine must be called with SIGHUP blocked.
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*/
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RMPCONN *
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FindConn(RMPCONN *rconn)
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{
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RMPCONN *rtmp;
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for (rtmp = RmpConns; rtmp != NULL; rtmp = rtmp->next)
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if (bcmp((char *)&rconn->rmp.hp_hdr.saddr[0],
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(char *)&rtmp->rmp.hp_hdr.saddr[0], RMP_ADDRLEN) == 0)
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break;
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|
|
|
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;
|
|
}
|
|
}
|
|
}
|