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 defined(CONFIG_CMD_NET)
36 #define TIMEOUT 5000UL /* Milliseconds 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 defined(CONFIG_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 defined(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 */
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 #if !defined(CONFIG_BOOTP_SERVERIP)
124 NetCopyIP(&tmp_ip
, &bp
->bp_siaddr
);
126 NetCopyIP(&NetServerIP
, &bp
->bp_siaddr
);
127 memcpy (NetServerEther
, ((Ethernet_t
*)NetRxPacket
)->et_src
, 6);
129 if (strlen(bp
->bp_file
) > 0)
130 copy_filename (BootFile
, bp
->bp_file
, sizeof(BootFile
));
132 debug ("Bootfile: %s\n", BootFile
);
134 /* Propagate to environment:
135 * don't delete exising entry when BOOTP / DHCP reply does
136 * not contain a new value
139 setenv ("bootfile", BootFile
);
143 static int truncate_sz (const char *name
, int maxlen
, int curlen
)
145 if (curlen
>= maxlen
) {
146 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
147 name
, curlen
, maxlen
);
153 #if !defined(CONFIG_CMD_DHCP)
155 static void BootpVendorFieldProcess (u8
* ext
)
157 int size
= *(ext
+ 1);
159 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
165 /* Fixed length fields */
166 case 1: /* Subnet mask */
167 if (NetOurSubnetMask
== 0)
168 NetCopyIP (&NetOurSubnetMask
, (IPaddr_t
*) (ext
+ 2));
170 case 2: /* Time offset - Not yet supported */
172 /* Variable length fields */
173 case 3: /* Gateways list */
174 if (NetOurGatewayIP
== 0) {
175 NetCopyIP (&NetOurGatewayIP
, (IPaddr_t
*) (ext
+ 2));
178 case 4: /* Time server - Not yet supported */
180 case 5: /* IEN-116 name server - Not yet supported */
183 if (NetOurDNSIP
== 0) {
184 NetCopyIP (&NetOurDNSIP
, (IPaddr_t
*) (ext
+ 2));
186 #if defined(CONFIG_BOOTP_DNS2)
187 if ((NetOurDNS2IP
== 0) && (size
> 4)) {
188 NetCopyIP (&NetOurDNS2IP
, (IPaddr_t
*) (ext
+ 2 + 4));
192 case 7: /* Log server - Not yet supported */
194 case 8: /* Cookie/Quote server - Not yet supported */
196 case 9: /* LPR server - Not yet supported */
198 case 10: /* Impress server - Not yet supported */
200 case 11: /* RPL server - Not yet supported */
202 case 12: /* Host name */
203 if (NetOurHostName
[0] == 0) {
204 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), size
);
205 memcpy (&NetOurHostName
, ext
+ 2, size
);
206 NetOurHostName
[size
] = 0;
209 case 13: /* Boot file size */
211 NetBootFileSize
= ntohs (*(ushort
*) (ext
+ 2));
213 NetBootFileSize
= ntohl (*(ulong
*) (ext
+ 2));
215 case 14: /* Merit dump file - Not yet supported */
217 case 15: /* Domain name - Not yet supported */
219 case 16: /* Swap server - Not yet supported */
221 case 17: /* Root path */
222 if (NetOurRootPath
[0] == 0) {
223 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), size
);
224 memcpy (&NetOurRootPath
, ext
+ 2, size
);
225 NetOurRootPath
[size
] = 0;
228 case 18: /* Extension path - Not yet supported */
230 * This can be used to send the information of the
231 * vendor area in another file that the client can
235 /* IP host layer fields */
236 case 40: /* NIS Domain name */
237 if (NetOurNISDomain
[0] == 0) {
238 size
= truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain
), size
);
239 memcpy (&NetOurNISDomain
, ext
+ 2, size
);
240 NetOurNISDomain
[size
] = 0;
243 /* Application layer fields */
244 case 43: /* Vendor specific info - Not yet supported */
246 * Binary information to exchange specific
247 * product information.
250 /* Reserved (custom) fields (128..254) */
254 static void BootpVendorProcess (u8
* ext
, int size
)
256 u8
*end
= ext
+ size
;
258 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size
);
260 while ((ext
< end
) && (*ext
!= 0xff)) {
268 BootpVendorFieldProcess (opt
);
272 #ifdef DEBUG_BOOTP_EXT
273 puts ("[BOOTP] Received fields: \n");
274 if (NetOurSubnetMask
)
275 printf ("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask
);
278 printf ("NetOurGatewayIP : %pI4", &NetOurGatewayIP
);
280 if (NetBootFileSize
) {
281 printf ("NetBootFileSize : %d\n", NetBootFileSize
);
284 if (NetOurHostName
[0]) {
285 printf ("NetOurHostName : %s\n", NetOurHostName
);
288 if (NetOurRootPath
[0]) {
289 printf ("NetOurRootPath : %s\n", NetOurRootPath
);
292 if (NetOurNISDomain
[0]) {
293 printf ("NetOurNISDomain : %s\n", NetOurNISDomain
);
296 if (NetBootFileSize
) {
297 printf ("NetBootFileSize: %d\n", NetBootFileSize
);
299 #endif /* DEBUG_BOOTP_EXT */
302 * Handle a BOOTP received packet.
305 BootpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
310 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
311 src
, dest
, len
, sizeof (Bootp_t
));
315 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
319 * Got a good BOOTP reply. Copy the data into our variables.
321 #ifdef CONFIG_STATUS_LED
322 status_led_set (STATUS_LED_BOOT
, STATUS_LED_OFF
);
325 BootpCopyNetParams(bp
); /* Store net parameters from reply */
327 /* Retrieve extended information (we must parse the vendor area) */
328 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
329 BootpVendorProcess((uchar
*)&bp
->bp_vend
[4], len
);
331 NetSetTimeout(0, (thand_f
*)0);
333 debug ("Got good BOOTP\n");
335 if ((s
= getenv("autoload")) != NULL
) {
338 * Just use BOOTP to configure system;
339 * Do not use TFTP to load the bootfile.
341 NetState
= NETLOOP_SUCCESS
;
343 #if defined(CONFIG_CMD_NFS)
344 } else if (strcmp(s
, "NFS") == 0) {
346 * Use NFS to load the bootfile.
359 * Timeout on BOOTP/DHCP request.
364 if (BootpTry
>= TIMEOUT_COUNT
) {
365 puts ("\nRetry count exceeded; starting again\n");
368 NetSetTimeout (TIMEOUT
, BootpTimeout
);
374 * Initialize BOOTP extension fields in the request.
376 #if defined(CONFIG_CMD_DHCP)
377 static int DhcpExtended (u8
* e
, int message_type
, IPaddr_t ServerID
, IPaddr_t RequestedIP
)
382 #if defined(CONFIG_BOOTP_VENDOREX)
385 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
389 *e
++ = 99; /* RFC1048 Magic Cookie */
394 *e
++ = 53; /* DHCP Message Type */
398 *e
++ = 57; /* Maximum DHCP Message Size */
400 *e
++ = (576 - 312 + OPT_SIZE
) >> 8;
401 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
404 int tmp
= ntohl (ServerID
);
406 *e
++ = 54; /* ServerID */
415 int tmp
= ntohl (RequestedIP
);
417 *e
++ = 50; /* Requested IP */
424 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
425 if ((hostname
= getenv ("hostname"))) {
426 int hostnamelen
= strlen (hostname
);
428 *e
++ = 12; /* Hostname */
430 memcpy (e
, hostname
, hostnamelen
);
435 #if defined(CONFIG_BOOTP_VENDOREX)
436 if ((x
= dhcp_vendorex_prep (e
)))
440 *e
++ = 55; /* Parameter Request List */
441 cnt
= e
++; /* Pointer to count of requested items */
443 #if defined(CONFIG_BOOTP_SUBNETMASK)
444 *e
++ = 1; /* Subnet Mask */
447 #if defined(CONFIG_BOOTP_TIMEOFFSET)
451 #if defined(CONFIG_BOOTP_GATEWAY)
452 *e
++ = 3; /* Router Option */
455 #if defined(CONFIG_BOOTP_DNS)
456 *e
++ = 6; /* DNS Server(s) */
459 #if defined(CONFIG_BOOTP_HOSTNAME)
460 *e
++ = 12; /* Hostname */
463 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
464 *e
++ = 13; /* Boot File Size */
467 #if defined(CONFIG_BOOTP_BOOTPATH)
468 *e
++ = 17; /* Boot path */
471 #if defined(CONFIG_BOOTP_NISDOMAIN)
472 *e
++ = 40; /* NIS Domain name request */
475 #if defined(CONFIG_BOOTP_NTPSERVER)
479 *e
++ = 255; /* End of the list */
481 /* Pad to minimal length */
482 #ifdef CONFIG_DHCP_MIN_EXT_LEN
483 while ((e
- start
) <= CONFIG_DHCP_MIN_EXT_LEN
)
492 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
494 static int BootpExtended (u8
* e
)
498 *e
++ = 99; /* RFC1048 Magic Cookie */
503 #if defined(CONFIG_CMD_DHCP)
504 *e
++ = 53; /* DHCP Message Type */
506 *e
++ = DHCP_DISCOVER
;
508 *e
++ = 57; /* Maximum DHCP Message Size */
510 *e
++ = (576 - 312 + OPT_SIZE
) >> 16;
511 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
514 #if defined(CONFIG_BOOTP_SUBNETMASK)
515 *e
++ = 1; /* Subnet mask request */
520 #if defined(CONFIG_BOOTP_GATEWAY)
521 *e
++ = 3; /* Default gateway request */
526 #if defined(CONFIG_BOOTP_DNS)
527 *e
++ = 6; /* Domain Name Server */
532 #if defined(CONFIG_BOOTP_HOSTNAME)
533 *e
++ = 12; /* Host name request */
538 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
539 *e
++ = 13; /* Boot file size */
544 #if defined(CONFIG_BOOTP_BOOTPATH)
545 *e
++ = 17; /* Boot path */
550 #if defined(CONFIG_BOOTP_NISDOMAIN)
551 *e
++ = 40; /* NIS Domain name request */
556 *e
++ = 255; /* End of the list */
565 volatile uchar
*pkt
, *iphdr
;
567 int ext_len
, pktlen
, iplen
;
569 #if defined(CONFIG_CMD_DHCP)
573 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
574 unsigned char bi_enetaddr
[6];
576 ulong tst1
, tst2
, sum
, m_mask
, m_value
= 0;
580 eth_getenv_enetaddr("ethaddr", bi_enetaddr
);
583 puts ("BootpRequest => Our Mac: ");
584 for (reg
=0; reg
<6; reg
++) {
587 reg
==5 ? '\n' : ':');
591 /* Mac-Manipulation 2 get seed1 */
594 for (reg
=2; reg
<6; reg
++) {
596 tst1
= tst1
| bi_enetaddr
[reg
];
598 for (reg
=0; reg
<2; reg
++) {
599 tst2
= tst2
| bi_enetaddr
[reg
];
607 for (reg
=1;reg
<=32;reg
++) {
608 m_value
|= (m_mask
& seed1
);
610 m_value
= m_value
<< 1;
616 /* Random Number Generator */
618 for (reg
=0;reg
<=0;reg
++) {
620 if (sum
< seed1
|| sum
< seed2
)
625 if (BootpTry
<=2) { /* Start with max 1024 * 1ms */
626 sum
= sum
>> (22-BootpTry
);
627 } else { /*After 3rd BOOTP request max 8192 * 1ms */
632 printf ("Random delay: %ld ms...\n", sum
);
633 for (reg
=0; reg
<sum
; reg
++) {
634 udelay(1000); /*Wait 1ms*/
636 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
638 printf("BOOTP broadcast %d\n", ++BootpTry
);
640 memset ((void*)pkt
, 0, PKTSIZE
);
642 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
645 * Next line results in incorrect packet size being transmitted, resulting
646 * in errors in some DHCP servers, reporting missing bytes. Size must be
647 * set in packet header after extension length has been determined.
648 * C. Hallinan, DS4.COM, Inc.
650 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
651 iphdr
= pkt
; /* We need this later for NetSetIP() */
655 bp
->bp_op
= OP_BOOTREQUEST
;
656 bp
->bp_htype
= HWT_ETHER
;
657 bp
->bp_hlen
= HWL_ETHER
;
659 bp
->bp_secs
= htons(get_timer(0) / 1000);
660 NetWriteIP(&bp
->bp_ciaddr
, 0);
661 NetWriteIP(&bp
->bp_yiaddr
, 0);
662 NetWriteIP(&bp
->bp_siaddr
, 0);
663 NetWriteIP(&bp
->bp_giaddr
, 0);
664 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
665 copy_filename (bp
->bp_file
, BootFile
, sizeof(bp
->bp_file
));
667 /* Request additional information from the BOOTP/DHCP server */
668 #if defined(CONFIG_CMD_DHCP)
669 ext_len
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, 0, 0);
671 ext_len
= BootpExtended((u8
*)bp
->bp_vend
);
675 * Bootp ID is the lower 4 bytes of our ethernet address
676 * plus the current time in ms.
678 BootpID
= ((ulong
)NetOurEther
[2] << 24)
679 | ((ulong
)NetOurEther
[3] << 16)
680 | ((ulong
)NetOurEther
[4] << 8)
681 | (ulong
)NetOurEther
[5];
682 BootpID
+= get_timer(0);
683 BootpID
= htonl(BootpID
);
684 NetCopyLong(&bp
->bp_id
, &BootpID
);
687 * Calculate proper packet lengths taking into account the
688 * variable size of the options field
690 pktlen
= ((int)(pkt
-NetTxPacket
)) + BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
691 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
692 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
693 NetSetTimeout(SELECT_TIMEOUT
, BootpTimeout
);
695 #if defined(CONFIG_CMD_DHCP)
696 dhcp_state
= SELECTING
;
697 NetSetHandler(DhcpHandler
);
699 NetSetHandler(BootpHandler
);
701 NetSendPacket(NetTxPacket
, pktlen
);
704 #if defined(CONFIG_CMD_DHCP)
705 static void DhcpOptionsProcess (uchar
* popt
, Bootp_t
*bp
)
707 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
710 while (popt
< end
&& *popt
!= 0xff) {
714 NetCopyIP (&NetOurSubnetMask
, (popt
+ 2));
716 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
717 case 2: /* Time offset */
718 NetCopyLong ((ulong
*)&NetTimeOffset
, (ulong
*) (popt
+ 2));
719 NetTimeOffset
= ntohl (NetTimeOffset
);
723 NetCopyIP (&NetOurGatewayIP
, (popt
+ 2));
726 NetCopyIP (&NetOurDNSIP
, (popt
+ 2));
727 #if defined(CONFIG_BOOTP_DNS2)
728 if (*(popt
+ 1) > 4) {
729 NetCopyIP (&NetOurDNS2IP
, (popt
+ 2 + 4));
734 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), oplen
);
735 memcpy (&NetOurHostName
, popt
+ 2, size
);
736 NetOurHostName
[size
] = 0;
738 case 15: /* Ignore Domain Name Option */
741 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), oplen
);
742 memcpy (&NetOurRootPath
, popt
+ 2, size
);
743 NetOurRootPath
[size
] = 0;
745 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
746 case 42: /* NTP server IP */
747 NetCopyIP (&NetNtpServerIP
, (popt
+ 2));
751 NetCopyLong (&dhcp_leasetime
, (ulong
*) (popt
+ 2));
753 case 53: /* Ignore Message Type Option */
756 NetCopyIP (&NetDHCPServerIP
, (popt
+ 2));
758 case 58: /* Ignore Renewal Time Option */
760 case 59: /* Ignore Rebinding Time Option */
762 case 66: /* Ignore TFTP server name */
764 case 67: /* vendor opt bootfile */
766 * I can't use dhcp_vendorex_proc here because I need
767 * to write into the bootp packet - even then I had to
768 * pass the bootp packet pointer into here as the
771 size
= truncate_sz ("Opt Boot File",
774 if (bp
->bp_file
[0] == '\0' && size
> 0) {
776 * only use vendor boot file if we didn't
777 * receive a boot file in the main non-vendor
778 * part of the packet - god only knows why
779 * some vendors chose not to use this perfectly
780 * good spot to store the boot file (join on
781 * Tru64 Unix) it seems mind bogglingly crazy
784 printf("*** WARNING: using vendor "
785 "optional boot file\n");
786 memcpy(bp
->bp_file
, popt
+ 2, size
);
787 bp
->bp_file
[size
] = '\0';
791 #if defined(CONFIG_BOOTP_VENDOREX)
792 if (dhcp_vendorex_proc (popt
))
795 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt
);
798 popt
+= oplen
+ 2; /* Process next option */
802 static int DhcpMessageType(unsigned char *popt
)
804 if (NetReadLong((ulong
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
808 while ( *popt
!= 0xff ) {
809 if ( *popt
== 53 ) /* DHCP Message Type */
811 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
816 static void DhcpSendRequestPkt(Bootp_t
*bp_offer
)
818 volatile uchar
*pkt
, *iphdr
;
820 int pktlen
, iplen
, extlen
;
823 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
825 memset ((void*)pkt
, 0, PKTSIZE
);
827 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
829 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
833 bp
->bp_op
= OP_BOOTREQUEST
;
834 bp
->bp_htype
= HWT_ETHER
;
835 bp
->bp_hlen
= HWL_ETHER
;
837 bp
->bp_secs
= htons(get_timer(0) / 1000);
838 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
842 * RFC3046 requires Relay Agents to discard packets with
843 * nonzero and offered giaddr
845 NetWriteIP(&bp
->bp_giaddr
, 0);
847 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
850 * ID is the id of the OFFER packet
853 NetCopyLong(&bp
->bp_id
, &bp_offer
->bp_id
);
856 * Copy options from OFFER packet if present
859 /* Copy offered IP into the parameters request list */
860 NetCopyIP(&OfferedIP
, &bp_offer
->bp_yiaddr
);
861 extlen
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_REQUEST
, NetDHCPServerIP
, OfferedIP
);
863 pktlen
= ((int)(pkt
-NetTxPacket
)) + BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
864 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
865 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
867 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
868 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
869 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY
);
870 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
871 NetSendPacket(NetTxPacket
, pktlen
);
875 * Handle DHCP received packets.
878 DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
880 Bootp_t
*bp
= (Bootp_t
*)pkt
;
882 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
883 src
, dest
, len
, dhcp_state
);
885 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
888 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
889 src
, dest
, len
, dhcp_state
);
891 switch (dhcp_state
) {
894 * Wait an appropriate time for any potential DHCPOFFER packets
895 * to arrive. Then select one, and generate DHCPREQUEST response.
896 * If filename is in format we recognize, assume it is a valid
897 * OFFER from a server we want.
899 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
900 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
901 if (strncmp(bp
->bp_file
,
902 CONFIG_SYS_BOOTFILE_PREFIX
,
903 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0 ) {
904 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
906 debug ("TRANSITIONING TO REQUESTING STATE\n");
907 dhcp_state
= REQUESTING
;
909 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
910 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
912 NetSetTimeout(TIMEOUT
, BootpTimeout
);
913 DhcpSendRequestPkt(bp
);
914 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
916 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
921 debug ("DHCP State: REQUESTING\n");
923 if ( DhcpMessageType((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
926 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
927 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
928 BootpCopyNetParams(bp
); /* Store net params from reply */
930 printf ("DHCP client bound to address %pI4\n", &NetOurIP
);
932 /* Obey the 'autoload' setting */
933 if ((s
= getenv("autoload")) != NULL
) {
936 * Just use BOOTP to configure system;
937 * Do not use TFTP to load the bootfile.
939 NetState
= NETLOOP_SUCCESS
;
941 #if defined(CONFIG_CMD_NFS)
942 } else if (strcmp(s
, "NFS") == 0) {
944 * Use NFS to load the bootfile.
956 /* DHCP client bound to address */
959 puts ("DHCP: INVALID STATE\n");
965 void DhcpRequest(void)
969 #endif /* CONFIG_CMD_DHCP */
971 #endif /* CONFIG_CMD_NET */