1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1992 The University of Utah and the Center 5 * for Software Science (CSS). 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Center for Software Science of the University of Utah Computer 11 * Science Department. CSS requests users of this software to return 12 * to css-dist@cs.utah.edu any improvements that they make and grant 13 * CSS redistribution rights. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * From: Utah Hdr: defs.h 3.1 92/07/06 40 * Author: Jeff Forys, University of Utah CSS 41 */ 42 43#include "rmp.h" 44#include "rmp_var.h" 45 46/* 47** Common #define's and external variables. All other files should 48** include this. 49*/ 50 51/* 52 * This may be defined in <sys/param.h>, if not, it's defined here. 53 */ 54#ifndef MAXHOSTNAMELEN 55#define MAXHOSTNAMELEN 256 56#endif 57 58/* 59 * SIGUSR1 and SIGUSR2 are defined in <signal.h> for 4.3BSD systems. 60 */ 61#ifndef SIGUSR1 62#define SIGUSR1 SIGEMT 63#endif 64#ifndef SIGUSR2 65#define SIGUSR2 SIGFPE 66#endif 67 68/* 69 * These can be faster & more efficient than strcmp()/strncmp()... 70 */ 71#define STREQN(s1,s2) ((*s1 == *s2) && (strcmp(s1,s2) == 0)) 72#define STRNEQN(s1,s2,n) ((*s1 == *s2) && (strncmp(s1,s2,n) == 0)) 73 74/* 75 * Configuration file limitations. 76 */ 77#define C_MAXFILE 10 /* max number of boot-able files */ 78#define C_LINELEN 1024 /* max length of line */ 79 80/* 81 * Direction of packet (used as argument to DispPkt). 82 */ 83#define DIR_RCVD 0 84#define DIR_SENT 1 85#define DIR_NONE 2 86 87/* 88 * These need not be functions, so... 89 */ 90#define FreeStr(str) free(str) 91#define FreeClient(cli) free(cli) 92#define GenSessID() (++SessionID ? SessionID: ++SessionID) 93 94/* 95 * Converting an Ethernet address to a string is done in many routines. 96 * Using `rmp.hp_hdr.saddr' works because this field is *never* changed; 97 * it will *always* contain the source address of the packet. 98 */ 99#define EnetStr(rptr) GetEtherAddr(&(rptr)->rmp.hp_hdr.saddr[0]) 100 101/* 102 * Every machine we can boot will have one of these allocated for it 103 * (unless there are no restrictions on who we can boot). 104 */ 105typedef struct client_s { 106 u_int8_t addr[RMP_ADDRLEN]; /* addr of machine */ 107 char *files[C_MAXFILE]; /* boot-able files */ 108 struct client_s *next; /* ptr to next */ 109} CLIENT; 110 111/* 112 * Every active connection has one of these allocated for it. 113 */ 114typedef struct rmpconn_s { 115 struct rmp_packet rmp; /* RMP packet */ 116 int rmplen; /* length of packet */ 117 struct timeval tstamp; /* last time active */ 118 int bootfd; /* open boot file */ 119 struct rmpconn_s *next; /* ptr to next */ 120} RMPCONN; 121 122/* 123 * All these variables are defined in "conf.c". 124 */ 125extern char MyHost[]; /* this hosts' name */ 126extern pid_t MyPid; /* this processes' ID */ 127extern int DebugFlg; /* set true if debugging */ 128extern int BootAny; /* set true if we can boot anyone */ 129 130extern char *ConfigFile; /* configuration file */ 131extern char *DfltConfig; /* default configuration file */ 132extern char *DbgFile; /* debug output file */ 133extern char *PidFile; /* file containing pid of server */ 134extern char *BootDir; /* directory w/boot files */ 135 136extern FILE *DbgFp; /* debug file pointer */ 137extern char *IntfName; /* interface we are attached to */ 138 139extern u_int16_t SessionID; /* generated session ID */ 140 141extern char *BootFiles[]; /* list of boot files */ 142 143extern CLIENT *Clients; /* list of addrs we'll accept */ 144extern RMPCONN *RmpConns; /* list of active connections */ 145 146extern u_int8_t RmpMcastAddr[]; /* RMP multicast address */ 147 148void AddConn(RMPCONN *); 149int BootDone(RMPCONN *); 150void BpfClose(void); 151char *BpfGetIntfName(char **); 152int BpfOpen(void); 153int BpfRead(RMPCONN *, int); 154int BpfWrite(RMPCONN *); 155void DebugOff(int); 156void DebugOn(int); 157void DispPkt(RMPCONN *, int); 158void DoTimeout(void); 159void DspFlnm(u_int, char *); 160void Exit(int); 161CLIENT *FindClient(RMPCONN *); 162RMPCONN *FindConn(RMPCONN *); 163void FreeClients(void); 164void FreeConn(RMPCONN *); 165void FreeConns(void); 166int GetBootFiles(void); 167char *GetEtherAddr(u_int8_t *); 168CLIENT *NewClient(u_int8_t *); 169RMPCONN *NewConn(RMPCONN *); 170char *NewStr(char *); 171u_int8_t *ParseAddr(char *); 172int ParseConfig(void); 173void ProcessPacket(RMPCONN *, CLIENT *); 174void ReConfig(int); 175void RemoveConn(RMPCONN *); 176int SendBootRepl(struct rmp_packet *, RMPCONN *, char *[]); 177int SendFileNo(struct rmp_packet *, RMPCONN *, char *[]); 178int SendPacket(RMPCONN *); 179int SendReadRepl(RMPCONN *); 180int SendServerID(RMPCONN *); 181