1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Bootstrap Protocol (BOOTP).  RFC 951.
30 */
31/*
32 * HISTORY
33 *
34 * 14 May 1992 ? at NeXT
35 *	Added correct padding to struct nextvend.  This is
36 *	needed for the i386 due to alignment differences wrt
37 *	the m68k.  Also adjusted the size of the array fields
38 *	because the NeXT vendor area was overflowing the bootp
39 *	packet.
40 */
41
42#include <netinet/udp.h>
43
44#define iaddr_t struct in_addr
45
46struct bootp {
47	u_char	bp_op;		/* packet opcode type */
48#define	BOOTREQUEST	1
49#define	BOOTREPLY	2
50	u_char	bp_htype;	/* hardware addr type */
51	u_char	bp_hlen;	/* hardware addr length */
52	u_char	bp_hops;	/* gateway hops */
53	u_int32_t bp_xid;	/* transaction ID */
54	u_short	bp_secs;	/* seconds since boot began */
55	u_short	bp_unused;
56	iaddr_t	bp_ciaddr;	/* client IP address */
57	iaddr_t	bp_yiaddr;	/* 'your' IP address */
58	iaddr_t	bp_siaddr;	/* server IP address */
59	iaddr_t	bp_giaddr;	/* gateway IP address */
60	u_char	bp_chaddr[16];	/* client hardware address */
61	u_char	bp_sname[64];	/* server host name */
62	u_char	bp_file[128];	/* boot file name */
63	u_char	bp_vend[64];	/* vendor-specific area */
64};
65
66/*
67 * UDP port numbers, server and client.
68 */
69#define	IPPORT_BOOTPS		67
70#define	IPPORT_BOOTPC		68
71
72/*
73 * "vendor" data permitted for Stanford boot clients.
74 */
75struct vend {
76	u_char	v_magic[4];	/* magic number */
77	u_int32_t v_flags;	/* flags/opcodes, etc. */
78	u_char	v_unused[56];	/* currently unused */
79};
80#define	VM_STANFORD	"STAN"	/* v_magic for Stanford */
81
82/* v_flags values */
83#define	VF_PCBOOT	1	/* an IBMPC or Mac wants environment info */
84#define	VF_HELP		2	/* help me, I'm not registered */
85
86#define	NVMAXTEXT	55	/* don't change this, it just fits RFC951 */
87struct nextvend {
88	u_char nv_magic[4];	/* Magic number for vendor specificity */
89	u_char nv_version;	/* NeXT protocol version */
90	/*
91	 * Round the beginning
92	 * of the union to a 16
93	 * bit boundary due to
94	 * struct/union alignment
95	 * on the m68k.
96	 */
97	unsigned short	:0;
98	union {
99		u_char NV0[58];
100		struct {
101			u_char NV1_opcode;	/* opcode - Version 1 */
102			u_char NV1_xid;	/* transcation id */
103			u_char NV1_text[NVMAXTEXT];	/* text */
104			u_char NV1_null;	/* null terminator */
105		} NV1;
106	} nv_U;
107};
108#define	nv_unused	nv_U.NV0
109#define	nv_opcode	nv_U.NV1.NV1_opcode
110#define	nv_xid		nv_U.NV1.NV1_xid
111#define	nv_text		nv_U.NV1.NV1_text
112#define nv_null		nv_U.NV1.NV1_null
113
114/* Magic number */
115#define VM_NEXT		"NeXT"	/* v_magic for NeXT, Inc. */
116
117/* Opcodes */
118#define	BPOP_OK		0
119#define BPOP_QUERY	1
120#define	BPOP_QUERY_NE	2
121#define	BPOP_ERROR	3
122
123struct bootp_packet {
124    struct ip bp_ip;
125    struct udphdr bp_udp;
126    struct bootp bp_bootp;
127};
128
129#define	BOOTP_PKTSIZE (sizeof (struct bootp_packet))
130
131/* backoffs must be masks */
132#define	BOOTP_MIN_BACKOFF	0x7ff		/* 2.048 sec */
133#define	BOOTP_MAX_BACKOFF	0xffff		/* 65.535 sec */
134#define	BOOTP_RETRY		6		/* # retries */
135
136