xref: /openbmc/u-boot/net/bootp.h (revision 7237d22b)
1 /*
2  *	Copied from LiMon - BOOTP.
3  *
4  *	Copyright 1994, 1995, 2000 Neil Russell.
5  *	(See License)
6  *	Copyright 2000 Paolo Scaffardi
7  */
8 
9 #ifndef __BOOTP_H__
10 #define __BOOTP_H__
11 
12 #ifndef __NET_H__
13 #include <net.h>
14 #endif /* __NET_H__ */
15 
16 /**********************************************************************/
17 
18 /*
19  *	BOOTP header.
20  */
21 #if defined(CONFIG_CMD_DHCP)
22 /* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */
23 #define OPT_FIELD_SIZE 312
24 #if defined(CONFIG_BOOTP_VENDOREX)
25 extern u8 *dhcp_vendorex_prep(u8 *e); /*rtn new e after add own opts. */
26 extern u8 *dhcp_vendorex_proc(u8 *e); /*rtn next e if mine,else NULL  */
27 #endif
28 #else
29 #define OPT_FIELD_SIZE 64
30 #endif
31 
32 struct Bootp_t {
33 	uchar		bp_op;		/* Operation			*/
34 # define OP_BOOTREQUEST	1
35 # define OP_BOOTREPLY	2
36 	uchar		bp_htype;	/* Hardware type		*/
37 # define HWT_ETHER	1
38 	uchar		bp_hlen;	/* Hardware address length	*/
39 # define HWL_ETHER	6
40 	uchar		bp_hops;	/* Hop count (gateway thing)	*/
41 	ulong		bp_id;		/* Transaction ID		*/
42 	ushort		bp_secs;	/* Seconds since boot		*/
43 	ushort		bp_spare1;	/* Alignment			*/
44 	IPaddr_t	bp_ciaddr;	/* Client IP address		*/
45 	IPaddr_t	bp_yiaddr;	/* Your (client) IP address	*/
46 	IPaddr_t	bp_siaddr;	/* Server IP address		*/
47 	IPaddr_t	bp_giaddr;	/* Gateway IP address		*/
48 	uchar		bp_chaddr[16];	/* Client hardware address	*/
49 	char		bp_sname[64];	/* Server host name		*/
50 	char		bp_file[128];	/* Boot file name		*/
51 	char		bp_vend[OPT_FIELD_SIZE]; /* Vendor information	*/
52 };
53 
54 #define BOOTP_HDR_SIZE	sizeof(struct Bootp_t)
55 
56 /**********************************************************************/
57 /*
58  *	Global functions and variables.
59  */
60 
61 /* bootp.c */
62 extern ulong	BootpID;		/* ID of cur BOOTP request	*/
63 extern char	BootFile[128];		/* Boot file name		*/
64 extern int	BootpTry;
65 
66 
67 /* Send a BOOTP request */
68 extern void BootpRequest(void);
69 
70 /****************** DHCP Support *********************/
71 extern void DhcpRequest(void);
72 
73 /* DHCP States */
74 typedef enum { INIT,
75 	       INIT_REBOOT,
76 	       REBOOTING,
77 	       SELECTING,
78 	       REQUESTING,
79 	       REBINDING,
80 	       BOUND,
81 	       RENEWING } dhcp_state_t;
82 
83 #define DHCP_DISCOVER 1
84 #define DHCP_OFFER    2
85 #define DHCP_REQUEST  3
86 #define DHCP_DECLINE  4
87 #define DHCP_ACK      5
88 #define DHCP_NAK      6
89 #define DHCP_RELEASE  7
90 
91 #define SELECT_TIMEOUT 3000UL	/* Milliseconds to wait for offers */
92 
93 /**********************************************************************/
94 
95 #endif /* __BOOTP_H__ */
96