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