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 */
107typedef 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 */
116typedef 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 */
127extern	char	MyHost[];		/* this hosts' name */
128extern	pid_t	MyPid;			/* this processes' ID */
129extern	int	DebugFlg;		/* set true if debugging */
130extern	int	BootAny;		/* set true if we can boot anyone */
131
132extern	char	*ConfigFile;		/* configuration file */
133extern	char	*DfltConfig;		/* default configuration file */
134extern	char	*DbgFile;		/* debug output file */
135extern	char	*PidFile;		/* file containing pid of server */
136extern	char	*BootDir;		/* directory w/boot files */
137
138extern	FILE	*DbgFp;			/* debug file pointer */
139extern	char	*IntfName;		/* interface we are attached to */
140
141extern	u_int16_t SessionID;		/* generated session ID */
142
143extern	char	*BootFiles[];		/* list of boot files */
144
145extern	CLIENT	*Clients;		/* list of addrs we'll accept */
146extern	RMPCONN	*RmpConns;		/* list of active connections */
147
148extern	u_int8_t RmpMcastAddr[];	/* RMP multicast address */
149
150void	 AddConn(RMPCONN *);
151int	 BootDone(RMPCONN *);
152void	 BpfClose(void);
153char	*BpfGetIntfName(char **);
154int	 BpfOpen(void);
155int	 BpfRead(RMPCONN *, int);
156int	 BpfWrite(RMPCONN *);
157void	 DebugOff(int);
158void	 DebugOn(int);
159void	 DispPkt(RMPCONN *, int);
160void	 DoTimeout(void);
161void	 DspFlnm(u_int, char *);
162void	 Exit(int);
163CLIENT	*FindClient(RMPCONN *);
164RMPCONN	*FindConn(RMPCONN *);
165void	 FreeClients(void);
166void	 FreeConn(RMPCONN *);
167void	 FreeConns(void);
168int	 GetBootFiles(void);
169char	*GetEtherAddr(u_int8_t *);
170CLIENT	*NewClient(u_int8_t *);
171RMPCONN	*NewConn(RMPCONN *);
172char	*NewStr(char *);
173u_int8_t *ParseAddr(char *);
174int	 ParseConfig(void);
175void	 ProcessPacket(RMPCONN *, CLIENT *);
176void	 ReConfig(int);
177void	 RemoveConn(RMPCONN *);
178int	 SendBootRepl(struct rmp_packet *, RMPCONN *, char *[]);
179int	 SendFileNo(struct rmp_packet *, RMPCONN *, char *[]);
180int	 SendPacket(RMPCONN *);
181int	 SendReadRepl(RMPCONN *);
182int	 SendServerID(RMPCONN *);
183