]>
git.ipfire.org Git - people/ms/u-boot.git/blob - net/bootp.c
2 * Based on LiMon - BOOTP.
4 * Copyright 1994, 1995, 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2004 Wolfgang Denk, wd@denx.de
12 #define DEBUG 1 /* general debug */
13 #define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */
16 #ifdef DEBUG_BOOTP_EXT
17 #define debug_ext(fmt,args...) printf (fmt ,##args)
19 #define debug_ext(fmt,args...)
28 #ifdef CONFIG_STATUS_LED
29 #include <status_led.h>
32 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
34 #if (CONFIG_COMMANDS & CFG_CMD_NET)
36 #define TIMEOUT 5 /* Seconds before trying BOOTP again */
37 #ifndef CONFIG_NET_RETRY_COUNT
38 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
40 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
43 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
44 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
46 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
47 #define CONFIG_DHCP_MIN_EXT_LEN 64
52 #ifdef CONFIG_BOOTP_RANDOM_DELAY
56 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
57 dhcp_state_t dhcp_state
= INIT
;
58 unsigned long dhcp_leasetime
= 0;
59 IPaddr_t NetDHCPServerIP
= 0;
60 static void DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
);
64 static char *dhcpmsg2str(int type
)
67 case 1: return "DHCPDISCOVER"; break;
68 case 2: return "DHCPOFFER"; break;
69 case 3: return "DHCPREQUEST"; break;
70 case 4: return "DHCPDECLINE"; break;
71 case 5: return "DHCPACK"; break;
72 case 6: return "DHCPNACK"; break;
73 case 7: return "DHCPRELEASE"; break;
74 default: return "UNKNOWN/INVALID MSG TYPE"; break;
79 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
80 extern u8
*dhcp_vendorex_prep (u8
*e
); /*rtn new e after add own opts. */
81 extern u8
*dhcp_vendorex_proc (u8
*e
); /*rtn next e if mine,else NULL */
84 #endif /* CFG_CMD_DHCP */
86 static int BootpCheckPkt(uchar
*pkt
, unsigned dest
, unsigned src
, unsigned len
)
88 Bootp_t
*bp
= (Bootp_t
*) pkt
;
91 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
93 else if (len
< sizeof (Bootp_t
) - OPT_SIZE
)
95 else if (bp
->bp_op
!= OP_BOOTREQUEST
&&
96 bp
->bp_op
!= OP_BOOTREPLY
&&
97 bp
->bp_op
!= DHCP_OFFER
&&
98 bp
->bp_op
!= DHCP_ACK
&&
99 bp
->bp_op
!= DHCP_NAK
) {
102 else if (bp
->bp_htype
!= HWT_ETHER
)
104 else if (bp
->bp_hlen
!= HWL_ETHER
)
106 else if (NetReadLong((ulong
*)&bp
->bp_id
) != BootpID
) {
110 debug ("Filtering pkt = %d\n", retval
);
116 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
118 static void BootpCopyNetParams(Bootp_t
*bp
)
122 NetCopyIP(&NetOurIP
, &bp
->bp_yiaddr
);
123 NetCopyIP(&tmp_ip
, &bp
->bp_siaddr
);
125 NetCopyIP(&NetServerIP
, &bp
->bp_siaddr
);
126 memcpy (NetServerEther
, ((Ethernet_t
*)NetRxPkt
)->et_src
, 6);
127 if (strlen(bp
->bp_file
) > 0)
128 copy_filename (BootFile
, bp
->bp_file
, sizeof(BootFile
));
130 debug ("Bootfile: %s\n", BootFile
);
132 /* Propagate to environment:
133 * don't delete exising entry when BOOTP / DHCP reply does
134 * not contain a new value
137 setenv ("bootfile", BootFile
);
141 static int truncate_sz (const char *name
, int maxlen
, int curlen
)
143 if (curlen
>= maxlen
) {
144 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
145 name
, curlen
, maxlen
);
151 #if !(CONFIG_COMMANDS & CFG_CMD_DHCP)
153 static void BootpVendorFieldProcess (u8
* ext
)
155 int size
= *(ext
+ 1);
157 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
163 /* Fixed length fields */
164 case 1: /* Subnet mask */
165 if (NetOurSubnetMask
== 0)
166 NetCopyIP (&NetOurSubnetMask
, (IPaddr_t
*) (ext
+ 2));
168 case 2: /* Time offset - Not yet supported */
170 /* Variable length fields */
171 case 3: /* Gateways list */
172 if (NetOurGatewayIP
== 0) {
173 NetCopyIP (&NetOurGatewayIP
, (IPaddr_t
*) (ext
+ 2));
176 case 4: /* Time server - Not yet supported */
178 case 5: /* IEN-116 name server - Not yet supported */
181 if (NetOurDNSIP
== 0) {
182 NetCopyIP (&NetOurDNSIP
, (IPaddr_t
*) (ext
+ 2));
184 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2)
185 if ((NetOurDNS2IP
== 0) && (size
> 4)) {
186 NetCopyIP (&NetOurDNS2IP
, (IPaddr_t
*) (ext
+ 2 + 4));
190 case 7: /* Log server - Not yet supported */
192 case 8: /* Cookie/Quote server - Not yet supported */
194 case 9: /* LPR server - Not yet supported */
196 case 10: /* Impress server - Not yet supported */
198 case 11: /* RPL server - Not yet supported */
200 case 12: /* Host name */
201 if (NetOurHostName
[0] == 0) {
202 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), size
);
203 memcpy (&NetOurHostName
, ext
+ 2, size
);
204 NetOurHostName
[size
] = 0;
207 case 13: /* Boot file size */
209 NetBootFileSize
= ntohs (*(ushort
*) (ext
+ 2));
211 NetBootFileSize
= ntohl (*(ulong
*) (ext
+ 2));
213 case 14: /* Merit dump file - Not yet supported */
215 case 15: /* Domain name - Not yet supported */
217 case 16: /* Swap server - Not yet supported */
219 case 17: /* Root path */
220 if (NetOurRootPath
[0] == 0) {
221 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), size
);
222 memcpy (&NetOurRootPath
, ext
+ 2, size
);
223 NetOurRootPath
[size
] = 0;
226 case 18: /* Extension path - Not yet supported */
228 * This can be used to send the information of the
229 * vendor area in another file that the client can
233 /* IP host layer fields */
234 case 40: /* NIS Domain name */
235 if (NetOurNISDomain
[0] == 0) {
236 size
= truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain
), size
);
237 memcpy (&NetOurNISDomain
, ext
+ 2, size
);
238 NetOurNISDomain
[size
] = 0;
241 /* Application layer fields */
242 case 43: /* Vendor specific info - Not yet supported */
244 * Binary information to exchange specific
245 * product information.
248 /* Reserved (custom) fields (128..254) */
252 static void BootpVendorProcess (u8
* ext
, int size
)
254 u8
*end
= ext
+ size
;
256 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size
);
258 while ((ext
< end
) && (*ext
!= 0xff)) {
266 BootpVendorFieldProcess (opt
);
270 #ifdef DEBUG_BOOTP_EXT
271 puts ("[BOOTP] Received fields: \n");
272 if (NetOurSubnetMask
) {
273 puts ("NetOurSubnetMask : ");
274 print_IPaddr (NetOurSubnetMask
);
278 if (NetOurGatewayIP
) {
279 puts ("NetOurGatewayIP : ");
280 print_IPaddr (NetOurGatewayIP
);
284 if (NetBootFileSize
) {
285 printf ("NetBootFileSize : %d\n", NetBootFileSize
);
288 if (NetOurHostName
[0]) {
289 printf ("NetOurHostName : %s\n", NetOurHostName
);
292 if (NetOurRootPath
[0]) {
293 printf ("NetOurRootPath : %s\n", NetOurRootPath
);
296 if (NetOurNISDomain
[0]) {
297 printf ("NetOurNISDomain : %s\n", NetOurNISDomain
);
300 if (NetBootFileSize
) {
301 printf ("NetBootFileSize: %d\n", NetBootFileSize
);
303 #endif /* DEBUG_BOOTP_EXT */
306 * Handle a BOOTP received packet.
309 BootpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
314 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n",
315 src
, dest
, len
, sizeof (Bootp_t
));
319 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
323 * Got a good BOOTP reply. Copy the data into our variables.
325 #ifdef CONFIG_STATUS_LED
326 status_led_set (STATUS_LED_BOOT
, STATUS_LED_OFF
);
329 BootpCopyNetParams(bp
); /* Store net parameters from reply */
331 /* Retrieve extended information (we must parse the vendor area) */
332 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
333 BootpVendorProcess((uchar
*)&bp
->bp_vend
[4], len
);
335 NetSetTimeout(0, (thand_f
*)0);
337 debug ("Got good BOOTP\n");
339 if ((s
= getenv("autoload")) != NULL
) {
342 * Just use BOOTP to configure system;
343 * Do not use TFTP to load the bootfile.
345 NetState
= NETLOOP_SUCCESS
;
347 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
348 } else if (strcmp(s
, "NFS") == 0) {
350 * Use NFS to load the bootfile.
360 #endif /* !CFG_CMD_DHCP */
363 * Timeout on BOOTP/DHCP request.
368 if (BootpTry
>= TIMEOUT_COUNT
) {
369 puts ("\nRetry count exceeded; starting again\n");
372 NetSetTimeout (TIMEOUT
* CFG_HZ
, BootpTimeout
);
378 * Initialize BOOTP extension fields in the request.
380 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
381 static int DhcpExtended (u8
* e
, int message_type
, IPaddr_t ServerID
, IPaddr_t RequestedIP
)
386 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
389 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SEND_HOSTNAME)
393 *e
++ = 99; /* RFC1048 Magic Cookie */
398 *e
++ = 53; /* DHCP Message Type */
402 *e
++ = 57; /* Maximum DHCP Message Size */
404 *e
++ = (576 - 312 + OPT_SIZE
) >> 8;
405 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
408 int tmp
= ntohl (ServerID
);
410 *e
++ = 54; /* ServerID */
419 int tmp
= ntohl (RequestedIP
);
421 *e
++ = 50; /* Requested IP */
428 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SEND_HOSTNAME)
429 if ((hostname
= getenv ("hostname"))) {
430 int hostnamelen
= strlen (hostname
);
432 *e
++ = 12; /* Hostname */
434 memcpy (e
, hostname
, hostnamelen
);
439 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
440 if ((x
= dhcp_vendorex_prep (e
)))
444 *e
++ = 55; /* Parameter Request List */
445 cnt
= e
++; /* Pointer to count of requested items */
447 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
448 *e
++ = 1; /* Subnet Mask */
451 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_TIMEOFFSET)
455 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
456 *e
++ = 3; /* Router Option */
459 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
460 *e
++ = 6; /* DNS Server(s) */
463 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
464 *e
++ = 12; /* Hostname */
467 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
468 *e
++ = 13; /* Boot File Size */
471 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
472 *e
++ = 17; /* Boot path */
475 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
476 *e
++ = 40; /* NIS Domain name request */
479 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NTPSERVER)
483 *e
++ = 255; /* End of the list */
485 /* Pad to minimal length */
486 #ifdef CONFIG_DHCP_MIN_EXT_LEN
487 while ((e
- start
) <= CONFIG_DHCP_MIN_EXT_LEN
)
494 #else /* CFG_CMD_DHCP */
496 * Warning: no field size check - change CONFIG_BOOTP_MASK at your own risk!
498 static int BootpExtended (u8
* e
)
502 *e
++ = 99; /* RFC1048 Magic Cookie */
507 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
508 *e
++ = 53; /* DHCP Message Type */
510 *e
++ = DHCP_DISCOVER
;
512 *e
++ = 57; /* Maximum DHCP Message Size */
514 *e
++ = (576 - 312 + OPT_SIZE
) >> 16;
515 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
516 #endif /* CFG_CMD_DHCP */
518 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
519 *e
++ = 1; /* Subnet mask request */
524 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
525 *e
++ = 3; /* Default gateway request */
530 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
531 *e
++ = 6; /* Domain Name Server */
536 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
537 *e
++ = 12; /* Host name request */
542 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
543 *e
++ = 13; /* Boot file size */
548 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
549 *e
++ = 17; /* Boot path */
554 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
555 *e
++ = 40; /* NIS Domain name request */
560 *e
++ = 255; /* End of the list */
564 #endif /* CFG_CMD_DHCP */
569 volatile uchar
*pkt
, *iphdr
;
571 int ext_len
, pktlen
, iplen
;
573 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
577 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
578 unsigned char bi_enetaddr
[6];
582 ulong tst1
, tst2
, sum
, m_mask
, m_value
= 0;
586 reg
= getenv_r ("ethaddr", tmp
, sizeof(tmp
));
587 s
= (reg
> 0) ? tmp
: NULL
;
589 for (reg
=0; reg
<6; ++reg
) {
590 bi_enetaddr
[reg
] = s
? simple_strtoul(s
, &e
, 16) : 0;
596 puts ("BootpRequest => Our Mac: ");
597 for (reg
=0; reg
<6; reg
++) {
600 reg
==5 ? '\n' : ':');
604 /* Mac-Manipulation 2 get seed1 */
607 for (reg
=2; reg
<6; reg
++) {
609 tst1
= tst1
| bi_enetaddr
[reg
];
611 for (reg
=0; reg
<2; reg
++) {
612 tst2
= tst2
| bi_enetaddr
[reg
];
620 for (reg
=1;reg
<=32;reg
++) {
621 m_value
|= (m_mask
& seed1
);
623 m_value
= m_value
<< 1;
629 /* Random Number Generator */
631 for (reg
=0;reg
<=0;reg
++) {
633 if (sum
< seed1
|| sum
< seed2
)
638 if (BootpTry
<=2) { /* Start with max 1024 * 1ms */
639 sum
= sum
>> (22-BootpTry
);
640 } else { /*After 3rd BOOTP request max 8192 * 1ms */
645 printf ("Random delay: %ld ms...\n", sum
);
646 for (reg
=0; reg
<sum
; reg
++) {
647 udelay(1000); /*Wait 1ms*/
649 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
651 printf("BOOTP broadcast %d\n", ++BootpTry
);
653 memset ((void*)pkt
, 0, PKTSIZE
);
655 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
658 * Next line results in incorrect packet size being transmitted, resulting
659 * in errors in some DHCP servers, reporting missing bytes. Size must be
660 * set in packet header after extension length has been determined.
661 * C. Hallinan, DS4.COM, Inc.
663 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
664 iphdr
= pkt
; /* We need this later for NetSetIP() */
668 bp
->bp_op
= OP_BOOTREQUEST
;
669 bp
->bp_htype
= HWT_ETHER
;
670 bp
->bp_hlen
= HWL_ETHER
;
672 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
673 NetWriteIP(&bp
->bp_ciaddr
, 0);
674 NetWriteIP(&bp
->bp_yiaddr
, 0);
675 NetWriteIP(&bp
->bp_siaddr
, 0);
676 NetWriteIP(&bp
->bp_giaddr
, 0);
677 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
678 copy_filename (bp
->bp_file
, BootFile
, sizeof(bp
->bp_file
));
680 /* Request additional information from the BOOTP/DHCP server */
681 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
682 ext_len
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, 0, 0);
684 ext_len
= BootpExtended((u8
*)bp
->bp_vend
);
685 #endif /* CFG_CMD_DHCP */
688 * Bootp ID is the lower 4 bytes of our ethernet address
689 * plus the current time in HZ.
691 BootpID
= ((ulong
)NetOurEther
[2] << 24)
692 | ((ulong
)NetOurEther
[3] << 16)
693 | ((ulong
)NetOurEther
[4] << 8)
694 | (ulong
)NetOurEther
[5];
695 BootpID
+= get_timer(0);
696 BootpID
= htonl(BootpID
);
697 NetCopyLong(&bp
->bp_id
, &BootpID
);
700 * Calculate proper packet lengths taking into account the
701 * variable size of the options field
703 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
704 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
705 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
706 NetSetTimeout(SELECT_TIMEOUT
* CFG_HZ
, BootpTimeout
);
708 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
709 dhcp_state
= SELECTING
;
710 NetSetHandler(DhcpHandler
);
712 NetSetHandler(BootpHandler
);
713 #endif /* CFG_CMD_DHCP */
714 NetSendPacket(NetTxPacket
, pktlen
);
717 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
718 static void DhcpOptionsProcess (uchar
* popt
)
720 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
723 while (popt
< end
&& *popt
!= 0xff) {
727 NetCopyIP (&NetOurSubnetMask
, (popt
+ 2));
729 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) && (CONFIG_BOOTP_MASK & CONFIG_BOOTP_TIMEOFFSET)
730 case 2: /* Time offset */
731 NetCopyLong (&NetTimeOffset
, (ulong
*) (popt
+ 2));
732 NetTimeOffset
= ntohl (NetTimeOffset
);
736 NetCopyIP (&NetOurGatewayIP
, (popt
+ 2));
739 NetCopyIP (&NetOurDNSIP
, (popt
+ 2));
740 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2)
741 if (*(popt
+ 1) > 4) {
742 NetCopyIP (&NetOurDNS2IP
, (popt
+ 2 + 4));
747 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), oplen
);
748 memcpy (&NetOurHostName
, popt
+ 2, size
);
749 NetOurHostName
[size
] = 0;
751 case 15: /* Ignore Domain Name Option */
754 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), oplen
);
755 memcpy (&NetOurRootPath
, popt
+ 2, size
);
756 NetOurRootPath
[size
] = 0;
758 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) && (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NTPSERVER)
759 case 42: /* NTP server IP */
760 NetCopyIP (&NetNtpServerIP
, (popt
+ 2));
764 NetCopyLong (&dhcp_leasetime
, (ulong
*) (popt
+ 2));
766 case 53: /* Ignore Message Type Option */
769 NetCopyIP (&NetDHCPServerIP
, (popt
+ 2));
771 case 58: /* Ignore Renewal Time Option */
773 case 59: /* Ignore Rebinding Time Option */
776 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
777 if (dhcp_vendorex_proc (popt
))
780 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt
);
783 popt
+= oplen
+ 2; /* Process next option */
787 static int DhcpMessageType(unsigned char *popt
)
789 if (NetReadLong((ulong
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
793 while ( *popt
!= 0xff ) {
794 if ( *popt
== 53 ) /* DHCP Message Type */
796 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
801 static void DhcpSendRequestPkt(Bootp_t
*bp_offer
)
803 volatile uchar
*pkt
, *iphdr
;
805 int pktlen
, iplen
, extlen
;
808 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
810 memset ((void*)pkt
, 0, PKTSIZE
);
812 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
814 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
818 bp
->bp_op
= OP_BOOTREQUEST
;
819 bp
->bp_htype
= HWT_ETHER
;
820 bp
->bp_hlen
= HWL_ETHER
;
822 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
823 NetCopyIP(&bp
->bp_ciaddr
, &bp_offer
->bp_ciaddr
); /* both in network byte order */
824 NetCopyIP(&bp
->bp_yiaddr
, &bp_offer
->bp_yiaddr
);
825 NetCopyIP(&bp
->bp_siaddr
, &bp_offer
->bp_siaddr
);
826 NetCopyIP(&bp
->bp_giaddr
, &bp_offer
->bp_giaddr
);
827 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
830 * ID is the id of the OFFER packet
833 NetCopyLong(&bp
->bp_id
, &bp_offer
->bp_id
);
836 * Copy options from OFFER packet if present
838 NetCopyIP(&OfferedIP
, &bp
->bp_yiaddr
);
839 extlen
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_REQUEST
, NetDHCPServerIP
, OfferedIP
);
841 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
842 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
843 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
845 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
846 NetSendPacket(NetTxPacket
, pktlen
);
850 * Handle DHCP received packets.
853 DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
855 Bootp_t
*bp
= (Bootp_t
*)pkt
;
857 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
858 src
, dest
, len
, dhcp_state
);
860 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
863 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
864 src
, dest
, len
, dhcp_state
);
866 switch (dhcp_state
) {
869 * Wait an appropriate time for any potential DHCPOFFER packets
870 * to arrive. Then select one, and generate DHCPREQUEST response.
871 * If filename is in format we recognize, assume it is a valid
872 * OFFER from a server we want.
874 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
875 #ifdef CFG_BOOTFILE_PREFIX
876 if (strncmp(bp
->bp_file
,
878 strlen(CFG_BOOTFILE_PREFIX
)) == 0 ) {
879 #endif /* CFG_BOOTFILE_PREFIX */
881 debug ("TRANSITIONING TO REQUESTING STATE\n");
882 dhcp_state
= REQUESTING
;
884 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
885 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4]);
887 BootpCopyNetParams(bp
); /* Store net params from reply */
889 NetSetTimeout(TIMEOUT
* CFG_HZ
, BootpTimeout
);
890 DhcpSendRequestPkt(bp
);
891 #ifdef CFG_BOOTFILE_PREFIX
893 #endif /* CFG_BOOTFILE_PREFIX */
898 debug ("DHCP State: REQUESTING\n");
900 if ( DhcpMessageType((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
903 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
904 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4]);
905 BootpCopyNetParams(bp
); /* Store net params from reply */
907 puts ("DHCP client bound to address ");
908 print_IPaddr(NetOurIP
);
911 /* Obey the 'autoload' setting */
912 if ((s
= getenv("autoload")) != NULL
) {
915 * Just use BOOTP to configure system;
916 * Do not use TFTP to load the bootfile.
918 NetState
= NETLOOP_SUCCESS
;
920 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
921 } else if (strcmp(s
, "NFS") == 0) {
923 * Use NFS to load the bootfile.
935 puts ("DHCP: INVALID STATE\n");
941 void DhcpRequest(void)
945 #endif /* CFG_CMD_DHCP */
947 #endif /* CFG_CMD_NET */