1 /* 2 * Copyright (c) 1988, 1992 The University of Utah and the Center 3 * for Software Science (CSS). 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Center for Software Science of the University of Utah Computer 9 * Science Department. CSS requests users of this software to return 10 * to css-dist@cs.utah.edu any improvements that they make and grant 11 * CSS redistribution rights. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: @(#)defs.h 8.1 (Berkeley) 6/4/93 42 * 43 * From: Utah Hdr: defs.h 3.1 92/07/06 44 * Author: Jeff Forys, University of Utah CSS 45 * 46 * $FreeBSD$ 47 */ 48 49 #include "rmp.h" 50 #include "rmp_var.h" 51 52 /* 53 ** Common #define's and external variables. All other files should 54 ** include this. 55 */ 56 57 /* 58 * This may be defined in <sys/param.h>, if not, it's defined here. 59 */ 60 #ifndef MAXHOSTNAMELEN 61 #define MAXHOSTNAMELEN 256 62 #endif 63 64 /* 65 * SIGUSR1 and SIGUSR2 are defined in <signal.h> for 4.3BSD systems. 66 */ 67 #ifndef SIGUSR1 68 #define SIGUSR1 SIGEMT 69 #endif 70 #ifndef SIGUSR2 71 #define SIGUSR2 SIGFPE 72 #endif 73 74 /* 75 * These can be faster & more efficient than strcmp()/strncmp()... 76 */ 77 #define STREQN(s1,s2) ((*s1 == *s2) && (strcmp(s1,s2) == 0)) 78 #define STRNEQN(s1,s2,n) ((*s1 == *s2) && (strncmp(s1,s2,n) == 0)) 79 80 /* 81 * Configuration file limitations. 82 */ 83 #define C_MAXFILE 10 /* max number of boot-able files */ 84 #define C_LINELEN 1024 /* max length of line */ 85 86 /* 87 * Direction of packet (used as argument to DispPkt). 88 */ 89 #define DIR_RCVD 0 90 #define DIR_SENT 1 91 #define DIR_NONE 2 92 93 /* 94 * These need not be functions, so... 95 */ 96 #define FreeStr(str) free(str) 97 #define FreeClient(cli) free(cli) 98 #define GenSessID() (++SessionID ? SessionID: ++SessionID) 99 100 /* 101 * Converting an Ethernet address to a string is done in many routines. 102 * Using `rmp.hp_hdr.saddr' works because this field is *never* changed; 103 * it will *always* contain the source address of the packet. 104 */ 105 #define EnetStr(rptr) GetEtherAddr(&(rptr)->rmp.hp_hdr.saddr[0]) 106 107 /* 108 * Every machine we can boot will have one of these allocated for it 109 * (unless there are no restrictions on who we can boot). 110 */ 111 typedef struct client_s { 112 u_int8_t addr[RMP_ADDRLEN]; /* addr of machine */ 113 char *files[C_MAXFILE]; /* boot-able files */ 114 struct client_s *next; /* ptr to next */ 115 } CLIENT; 116 117 /* 118 * Every active connection has one of these allocated for it. 119 */ 120 typedef struct rmpconn_s { 121 struct rmp_packet rmp; /* RMP packet */ 122 int rmplen; /* length of packet */ 123 struct timeval tstamp; /* last time active */ 124 int bootfd; /* open boot file */ 125 struct rmpconn_s *next; /* ptr to next */ 126 } RMPCONN; 127 128 /* 129 * All these variables are defined in "conf.c". 130 */ 131 extern char MyHost[]; /* this hosts' name */ 132 extern pid_t MyPid; /* this processes' ID */ 133 extern int DebugFlg; /* set true if debugging */ 134 extern int BootAny; /* set true if we can boot anyone */ 135 136 extern char *ConfigFile; /* configuration file */ 137 extern char *DfltConfig; /* default configuration file */ 138 extern char *DbgFile; /* debug output file */ 139 extern char *PidFile; /* file containing pid of server */ 140 extern char *BootDir; /* directory w/boot files */ 141 142 extern FILE *DbgFp; /* debug file pointer */ 143 extern char *IntfName; /* interface we are attached to */ 144 145 extern u_int16_t SessionID; /* generated session ID */ 146 147 extern char *BootFiles[]; /* list of boot files */ 148 149 extern CLIENT *Clients; /* list of addrs we'll accept */ 150 extern RMPCONN *RmpConns; /* list of active connections */ 151 152 extern u_int8_t RmpMcastAddr[]; /* RMP multicast address */ 153 154 void AddConn(RMPCONN *); 155 int BootDone(RMPCONN *); 156 void BpfClose(void); 157 char *BpfGetIntfName(char **); 158 int BpfOpen(void); 159 int BpfRead(RMPCONN *, int); 160 int BpfWrite(RMPCONN *); 161 void DebugOff(int); 162 void DebugOn(int); 163 void DispPkt(RMPCONN *, int); 164 void DoTimeout(void); 165 void DspFlnm(u_int, char *); 166 void Exit(int); 167 CLIENT *FindClient(RMPCONN *); 168 RMPCONN *FindConn(RMPCONN *); 169 void FreeClients(void); 170 void FreeConn(RMPCONN *); 171 void FreeConns(void); 172 int GetBootFiles(void); 173 char *GetEtherAddr(u_int8_t *); 174 CLIENT *NewClient(u_int8_t *); 175 RMPCONN *NewConn(RMPCONN *); 176 char *NewStr(char *); 177 u_int8_t *ParseAddr(char *); 178 int ParseConfig(void); 179 void ProcessPacket(RMPCONN *, CLIENT *); 180 void ReConfig(int); 181 void RemoveConn(RMPCONN *); 182 int SendBootRepl(struct rmp_packet *, RMPCONN *, char *[]); 183 int SendFileNo(struct rmp_packet *, RMPCONN *, char *[]); 184 int SendPacket(RMPCONN *); 185 int SendReadRepl(RMPCONN *); 186 int SendServerID(RMPCONN *); 187