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 */ 105 typedef 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 */ 114 typedef 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 */ 125 extern char MyHost[]; /* this hosts' name */ 126 extern pid_t MyPid; /* this processes' ID */ 127 extern int DebugFlg; /* set true if debugging */ 128 extern int BootAny; /* set true if we can boot anyone */ 129 130 extern char *ConfigFile; /* configuration file */ 131 extern char *DfltConfig; /* default configuration file */ 132 extern char *DbgFile; /* debug output file */ 133 extern char *PidFile; /* file containing pid of server */ 134 extern char *BootDir; /* directory w/boot files */ 135 136 extern FILE *DbgFp; /* debug file pointer */ 137 extern char *IntfName; /* interface we are attached to */ 138 139 extern u_int16_t SessionID; /* generated session ID */ 140 141 extern char *BootFiles[]; /* list of boot files */ 142 143 extern CLIENT *Clients; /* list of addrs we'll accept */ 144 extern RMPCONN *RmpConns; /* list of active connections */ 145 146 extern u_int8_t RmpMcastAddr[]; /* RMP multicast address */ 147 148 void AddConn(RMPCONN *); 149 int BootDone(RMPCONN *); 150 void BpfClose(void); 151 char *BpfGetIntfName(char **); 152 int BpfOpen(void); 153 int BpfRead(RMPCONN *, int); 154 int BpfWrite(RMPCONN *); 155 void DebugOff(int); 156 void DebugOn(int); 157 void DispPkt(RMPCONN *, int); 158 void DoTimeout(void); 159 void DspFlnm(u_int, char *); 160 void Exit(int); 161 CLIENT *FindClient(RMPCONN *); 162 RMPCONN *FindConn(RMPCONN *); 163 void FreeClients(void); 164 void FreeConn(RMPCONN *); 165 void FreeConns(void); 166 int GetBootFiles(void); 167 char *GetEtherAddr(u_int8_t *); 168 CLIENT *NewClient(u_int8_t *); 169 RMPCONN *NewConn(RMPCONN *); 170 char *NewStr(char *); 171 u_int8_t *ParseAddr(char *); 172 int ParseConfig(void); 173 void ProcessPacket(RMPCONN *, CLIENT *); 174 void ReConfig(int); 175 void RemoveConn(RMPCONN *); 176 int SendBootRepl(struct rmp_packet *, RMPCONN *, char *[]); 177 int SendFileNo(struct rmp_packet *, RMPCONN *, char *[]); 178 int SendPacket(RMPCONN *); 179 int SendReadRepl(RMPCONN *); 180 int SendServerID(RMPCONN *); 181