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Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
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;
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|