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
17 #ifdef CONFIG_STATUS_LED
18 #include <status_led.h>
21 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
23 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
24 #ifndef CONFIG_NET_RETRY_COUNT
25 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
27 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
30 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
31 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
33 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
34 #define CONFIG_DHCP_MIN_EXT_LEN 64
39 #ifdef CONFIG_BOOTP_RANDOM_DELAY
43 #if defined(CONFIG_CMD_DHCP)
44 dhcp_state_t dhcp_state
= INIT
;
45 unsigned long dhcp_leasetime
= 0;
46 IPaddr_t NetDHCPServerIP
= 0;
47 static void DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
);
51 static char *dhcpmsg2str(int type
)
54 case 1: return "DHCPDISCOVER"; break;
55 case 2: return "DHCPOFFER"; break;
56 case 3: return "DHCPREQUEST"; break;
57 case 4: return "DHCPDECLINE"; break;
58 case 5: return "DHCPACK"; break;
59 case 6: return "DHCPNACK"; break;
60 case 7: return "DHCPRELEASE"; break;
61 default: return "UNKNOWN/INVALID MSG TYPE"; break;
66 #if defined(CONFIG_BOOTP_VENDOREX)
67 extern u8
*dhcp_vendorex_prep (u8
*e
); /*rtn new e after add own opts. */
68 extern u8
*dhcp_vendorex_proc (u8
*e
); /*rtn next e if mine,else NULL */
73 static int BootpCheckPkt(uchar
*pkt
, unsigned dest
, unsigned src
, unsigned len
)
75 Bootp_t
*bp
= (Bootp_t
*) pkt
;
78 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
80 else if (len
< sizeof (Bootp_t
) - OPT_SIZE
)
82 else if (bp
->bp_op
!= OP_BOOTREQUEST
&&
83 bp
->bp_op
!= OP_BOOTREPLY
&&
84 bp
->bp_op
!= DHCP_OFFER
&&
85 bp
->bp_op
!= DHCP_ACK
&&
86 bp
->bp_op
!= DHCP_NAK
) {
89 else if (bp
->bp_htype
!= HWT_ETHER
)
91 else if (bp
->bp_hlen
!= HWL_ETHER
)
93 else if (NetReadLong((ulong
*)&bp
->bp_id
) != BootpID
) {
97 debug("Filtering pkt = %d\n", retval
);
103 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
105 static void BootpCopyNetParams(Bootp_t
*bp
)
109 NetCopyIP(&NetOurIP
, &bp
->bp_yiaddr
);
110 #if !defined(CONFIG_BOOTP_SERVERIP)
111 NetCopyIP(&tmp_ip
, &bp
->bp_siaddr
);
113 NetCopyIP(&NetServerIP
, &bp
->bp_siaddr
);
114 memcpy (NetServerEther
, ((Ethernet_t
*)NetRxPacket
)->et_src
, 6);
116 if (strlen(bp
->bp_file
) > 0)
117 copy_filename (BootFile
, bp
->bp_file
, sizeof(BootFile
));
119 debug("Bootfile: %s\n", BootFile
);
121 /* Propagate to environment:
122 * don't delete exising entry when BOOTP / DHCP reply does
123 * not contain a new value
126 setenv ("bootfile", BootFile
);
130 static int truncate_sz (const char *name
, int maxlen
, int curlen
)
132 if (curlen
>= maxlen
) {
133 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
134 name
, curlen
, maxlen
);
140 #if !defined(CONFIG_CMD_DHCP)
142 static void BootpVendorFieldProcess (u8
* ext
)
144 int size
= *(ext
+ 1);
146 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
152 /* Fixed length fields */
153 case 1: /* Subnet mask */
154 if (NetOurSubnetMask
== 0)
155 NetCopyIP (&NetOurSubnetMask
, (IPaddr_t
*) (ext
+ 2));
157 case 2: /* Time offset - Not yet supported */
159 /* Variable length fields */
160 case 3: /* Gateways list */
161 if (NetOurGatewayIP
== 0) {
162 NetCopyIP (&NetOurGatewayIP
, (IPaddr_t
*) (ext
+ 2));
165 case 4: /* Time server - Not yet supported */
167 case 5: /* IEN-116 name server - Not yet supported */
170 if (NetOurDNSIP
== 0) {
171 NetCopyIP (&NetOurDNSIP
, (IPaddr_t
*) (ext
+ 2));
173 #if defined(CONFIG_BOOTP_DNS2)
174 if ((NetOurDNS2IP
== 0) && (size
> 4)) {
175 NetCopyIP (&NetOurDNS2IP
, (IPaddr_t
*) (ext
+ 2 + 4));
179 case 7: /* Log server - Not yet supported */
181 case 8: /* Cookie/Quote server - Not yet supported */
183 case 9: /* LPR server - Not yet supported */
185 case 10: /* Impress server - Not yet supported */
187 case 11: /* RPL server - Not yet supported */
189 case 12: /* Host name */
190 if (NetOurHostName
[0] == 0) {
191 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), size
);
192 memcpy (&NetOurHostName
, ext
+ 2, size
);
193 NetOurHostName
[size
] = 0;
196 case 13: /* Boot file size */
198 NetBootFileSize
= ntohs (*(ushort
*) (ext
+ 2));
200 NetBootFileSize
= ntohl (*(ulong
*) (ext
+ 2));
202 case 14: /* Merit dump file - Not yet supported */
204 case 15: /* Domain name - Not yet supported */
206 case 16: /* Swap server - Not yet supported */
208 case 17: /* Root path */
209 if (NetOurRootPath
[0] == 0) {
210 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), size
);
211 memcpy (&NetOurRootPath
, ext
+ 2, size
);
212 NetOurRootPath
[size
] = 0;
215 case 18: /* Extension path - Not yet supported */
217 * This can be used to send the information of the
218 * vendor area in another file that the client can
222 /* IP host layer fields */
223 case 40: /* NIS Domain name */
224 if (NetOurNISDomain
[0] == 0) {
225 size
= truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain
), size
);
226 memcpy (&NetOurNISDomain
, ext
+ 2, size
);
227 NetOurNISDomain
[size
] = 0;
230 /* Application layer fields */
231 case 43: /* Vendor specific info - Not yet supported */
233 * Binary information to exchange specific
234 * product information.
237 /* Reserved (custom) fields (128..254) */
241 static void BootpVendorProcess (u8
* ext
, int size
)
243 u8
*end
= ext
+ size
;
245 debug("[BOOTP] Checking extension (%d bytes)...\n", size
);
247 while ((ext
< end
) && (*ext
!= 0xff)) {
255 BootpVendorFieldProcess (opt
);
259 debug("[BOOTP] Received fields: \n");
260 if (NetOurSubnetMask
)
261 debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask
);
264 debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP
);
267 debug("NetBootFileSize : %d\n", NetBootFileSize
);
269 if (NetOurHostName
[0])
270 debug("NetOurHostName : %s\n", NetOurHostName
);
272 if (NetOurRootPath
[0])
273 debug("NetOurRootPath : %s\n", NetOurRootPath
);
275 if (NetOurNISDomain
[0])
276 debug("NetOurNISDomain : %s\n", NetOurNISDomain
);
279 debug("NetBootFileSize: %d\n", NetBootFileSize
);
282 * Handle a BOOTP received packet.
285 BootpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
290 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
291 src
, dest
, len
, sizeof (Bootp_t
));
295 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
299 * Got a good BOOTP reply. Copy the data into our variables.
301 #ifdef CONFIG_STATUS_LED
302 status_led_set (STATUS_LED_BOOT
, STATUS_LED_OFF
);
305 BootpCopyNetParams(bp
); /* Store net parameters from reply */
307 /* Retrieve extended information (we must parse the vendor area) */
308 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
309 BootpVendorProcess((uchar
*)&bp
->bp_vend
[4], len
);
311 NetSetTimeout(0, (thand_f
*)0);
313 debug("Got good BOOTP\n");
315 if ((s
= getenv("autoload")) != NULL
) {
318 * Just use BOOTP to configure system;
319 * Do not use TFTP to load the bootfile.
321 NetState
= NETLOOP_SUCCESS
;
323 #if defined(CONFIG_CMD_NFS)
324 } else if (strcmp(s
, "NFS") == 0) {
326 * Use NFS to load the bootfile.
339 * Timeout on BOOTP/DHCP request.
344 if (BootpTry
>= TIMEOUT_COUNT
) {
345 puts ("\nRetry count exceeded; starting again\n");
348 NetSetTimeout (TIMEOUT
, BootpTimeout
);
354 * Initialize BOOTP extension fields in the request.
356 #if defined(CONFIG_CMD_DHCP)
357 static int DhcpExtended (u8
* e
, int message_type
, IPaddr_t ServerID
, IPaddr_t RequestedIP
)
362 #if defined(CONFIG_BOOTP_VENDOREX)
365 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
369 *e
++ = 99; /* RFC1048 Magic Cookie */
374 *e
++ = 53; /* DHCP Message Type */
378 *e
++ = 57; /* Maximum DHCP Message Size */
380 *e
++ = (576 - 312 + OPT_SIZE
) >> 8;
381 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
384 int tmp
= ntohl (ServerID
);
386 *e
++ = 54; /* ServerID */
395 int tmp
= ntohl (RequestedIP
);
397 *e
++ = 50; /* Requested IP */
404 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
405 if ((hostname
= getenv ("hostname"))) {
406 int hostnamelen
= strlen (hostname
);
408 *e
++ = 12; /* Hostname */
410 memcpy (e
, hostname
, hostnamelen
);
415 #if defined(CONFIG_BOOTP_VENDOREX)
416 if ((x
= dhcp_vendorex_prep (e
)))
420 *e
++ = 55; /* Parameter Request List */
421 cnt
= e
++; /* Pointer to count of requested items */
423 #if defined(CONFIG_BOOTP_SUBNETMASK)
424 *e
++ = 1; /* Subnet Mask */
427 #if defined(CONFIG_BOOTP_TIMEOFFSET)
431 #if defined(CONFIG_BOOTP_GATEWAY)
432 *e
++ = 3; /* Router Option */
435 #if defined(CONFIG_BOOTP_DNS)
436 *e
++ = 6; /* DNS Server(s) */
439 #if defined(CONFIG_BOOTP_HOSTNAME)
440 *e
++ = 12; /* Hostname */
443 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
444 *e
++ = 13; /* Boot File Size */
447 #if defined(CONFIG_BOOTP_BOOTPATH)
448 *e
++ = 17; /* Boot path */
451 #if defined(CONFIG_BOOTP_NISDOMAIN)
452 *e
++ = 40; /* NIS Domain name request */
455 #if defined(CONFIG_BOOTP_NTPSERVER)
459 *e
++ = 255; /* End of the list */
461 /* Pad to minimal length */
462 #ifdef CONFIG_DHCP_MIN_EXT_LEN
463 while ((e
- start
) <= CONFIG_DHCP_MIN_EXT_LEN
)
472 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
474 static int BootpExtended (u8
* e
)
478 *e
++ = 99; /* RFC1048 Magic Cookie */
483 #if defined(CONFIG_CMD_DHCP)
484 *e
++ = 53; /* DHCP Message Type */
486 *e
++ = DHCP_DISCOVER
;
488 *e
++ = 57; /* Maximum DHCP Message Size */
490 *e
++ = (576 - 312 + OPT_SIZE
) >> 16;
491 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
494 #if defined(CONFIG_BOOTP_SUBNETMASK)
495 *e
++ = 1; /* Subnet mask request */
500 #if defined(CONFIG_BOOTP_GATEWAY)
501 *e
++ = 3; /* Default gateway request */
506 #if defined(CONFIG_BOOTP_DNS)
507 *e
++ = 6; /* Domain Name Server */
512 #if defined(CONFIG_BOOTP_HOSTNAME)
513 *e
++ = 12; /* Host name request */
518 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
519 *e
++ = 13; /* Boot file size */
524 #if defined(CONFIG_BOOTP_BOOTPATH)
525 *e
++ = 17; /* Boot path */
530 #if defined(CONFIG_BOOTP_NISDOMAIN)
531 *e
++ = 40; /* NIS Domain name request */
536 *e
++ = 255; /* End of the list */
545 volatile uchar
*pkt
, *iphdr
;
547 int ext_len
, pktlen
, iplen
;
549 #if defined(CONFIG_CMD_DHCP)
553 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
554 unsigned char bi_enetaddr
[6];
556 ulong tst1
, tst2
, sum
, m_mask
, m_value
= 0;
560 eth_getenv_enetaddr("ethaddr", bi_enetaddr
);
562 debug("BootpRequest => Our Mac: ");
563 for (reg
=0; reg
<6; reg
++)
564 debug("%x%c", bi_enetaddr
[reg
], reg
==5 ? '\n' : ':');
566 /* Mac-Manipulation 2 get seed1 */
569 for (reg
=2; reg
<6; reg
++) {
571 tst1
= tst1
| bi_enetaddr
[reg
];
573 for (reg
=0; reg
<2; reg
++) {
574 tst2
= tst2
| bi_enetaddr
[reg
];
582 for (reg
=1;reg
<=32;reg
++) {
583 m_value
|= (m_mask
& seed1
);
585 m_value
= m_value
<< 1;
591 /* Random Number Generator */
593 for (reg
=0;reg
<=0;reg
++) {
595 if (sum
< seed1
|| sum
< seed2
)
600 if (BootpTry
<=2) { /* Start with max 1024 * 1ms */
601 sum
= sum
>> (22-BootpTry
);
602 } else { /*After 3rd BOOTP request max 8192 * 1ms */
607 printf ("Random delay: %ld ms...\n", sum
);
608 for (reg
=0; reg
<sum
; reg
++) {
609 udelay(1000); /*Wait 1ms*/
611 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
613 printf("BOOTP broadcast %d\n", ++BootpTry
);
615 memset ((void*)pkt
, 0, PKTSIZE
);
617 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
620 * Next line results in incorrect packet size being transmitted, resulting
621 * in errors in some DHCP servers, reporting missing bytes. Size must be
622 * set in packet header after extension length has been determined.
623 * C. Hallinan, DS4.COM, Inc.
625 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
626 iphdr
= pkt
; /* We need this later for NetSetIP() */
630 bp
->bp_op
= OP_BOOTREQUEST
;
631 bp
->bp_htype
= HWT_ETHER
;
632 bp
->bp_hlen
= HWL_ETHER
;
634 bp
->bp_secs
= htons(get_timer(0) / 1000);
635 NetWriteIP(&bp
->bp_ciaddr
, 0);
636 NetWriteIP(&bp
->bp_yiaddr
, 0);
637 NetWriteIP(&bp
->bp_siaddr
, 0);
638 NetWriteIP(&bp
->bp_giaddr
, 0);
639 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
640 copy_filename (bp
->bp_file
, BootFile
, sizeof(bp
->bp_file
));
642 /* Request additional information from the BOOTP/DHCP server */
643 #if defined(CONFIG_CMD_DHCP)
644 ext_len
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, 0, 0);
646 ext_len
= BootpExtended((u8
*)bp
->bp_vend
);
650 * Bootp ID is the lower 4 bytes of our ethernet address
651 * plus the current time in ms.
653 BootpID
= ((ulong
)NetOurEther
[2] << 24)
654 | ((ulong
)NetOurEther
[3] << 16)
655 | ((ulong
)NetOurEther
[4] << 8)
656 | (ulong
)NetOurEther
[5];
657 BootpID
+= get_timer(0);
658 BootpID
= htonl(BootpID
);
659 NetCopyLong(&bp
->bp_id
, &BootpID
);
662 * Calculate proper packet lengths taking into account the
663 * variable size of the options field
665 pktlen
= ((int)(pkt
-NetTxPacket
)) + BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
666 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
667 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
668 NetSetTimeout(SELECT_TIMEOUT
, BootpTimeout
);
670 #if defined(CONFIG_CMD_DHCP)
671 dhcp_state
= SELECTING
;
672 NetSetHandler(DhcpHandler
);
674 NetSetHandler(BootpHandler
);
676 NetSendPacket(NetTxPacket
, pktlen
);
679 #if defined(CONFIG_CMD_DHCP)
680 static void DhcpOptionsProcess (uchar
* popt
, Bootp_t
*bp
)
682 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
684 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
688 while (popt
< end
&& *popt
!= 0xff) {
692 NetCopyIP (&NetOurSubnetMask
, (popt
+ 2));
694 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
695 case 2: /* Time offset */
696 to_ptr
= &NetTimeOffset
;
697 NetCopyLong ((ulong
*)to_ptr
, (ulong
*)(popt
+ 2));
698 NetTimeOffset
= ntohl (NetTimeOffset
);
702 NetCopyIP (&NetOurGatewayIP
, (popt
+ 2));
705 NetCopyIP (&NetOurDNSIP
, (popt
+ 2));
706 #if defined(CONFIG_BOOTP_DNS2)
707 if (*(popt
+ 1) > 4) {
708 NetCopyIP (&NetOurDNS2IP
, (popt
+ 2 + 4));
713 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), oplen
);
714 memcpy (&NetOurHostName
, popt
+ 2, size
);
715 NetOurHostName
[size
] = 0;
717 case 15: /* Ignore Domain Name Option */
720 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), oplen
);
721 memcpy (&NetOurRootPath
, popt
+ 2, size
);
722 NetOurRootPath
[size
] = 0;
724 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
725 case 42: /* NTP server IP */
726 NetCopyIP (&NetNtpServerIP
, (popt
+ 2));
730 NetCopyLong (&dhcp_leasetime
, (ulong
*) (popt
+ 2));
732 case 53: /* Ignore Message Type Option */
735 NetCopyIP (&NetDHCPServerIP
, (popt
+ 2));
737 case 58: /* Ignore Renewal Time Option */
739 case 59: /* Ignore Rebinding Time Option */
741 case 66: /* Ignore TFTP server name */
743 case 67: /* vendor opt bootfile */
745 * I can't use dhcp_vendorex_proc here because I need
746 * to write into the bootp packet - even then I had to
747 * pass the bootp packet pointer into here as the
750 size
= truncate_sz ("Opt Boot File",
753 if (bp
->bp_file
[0] == '\0' && size
> 0) {
755 * only use vendor boot file if we didn't
756 * receive a boot file in the main non-vendor
757 * part of the packet - god only knows why
758 * some vendors chose not to use this perfectly
759 * good spot to store the boot file (join on
760 * Tru64 Unix) it seems mind bogglingly crazy
763 printf("*** WARNING: using vendor "
764 "optional boot file\n");
765 memcpy(bp
->bp_file
, popt
+ 2, size
);
766 bp
->bp_file
[size
] = '\0';
770 #if defined(CONFIG_BOOTP_VENDOREX)
771 if (dhcp_vendorex_proc (popt
))
774 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt
);
777 popt
+= oplen
+ 2; /* Process next option */
781 static int DhcpMessageType(unsigned char *popt
)
783 if (NetReadLong((ulong
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
787 while ( *popt
!= 0xff ) {
788 if ( *popt
== 53 ) /* DHCP Message Type */
790 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
795 static void DhcpSendRequestPkt(Bootp_t
*bp_offer
)
797 volatile uchar
*pkt
, *iphdr
;
799 int pktlen
, iplen
, extlen
;
802 debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
804 memset ((void*)pkt
, 0, PKTSIZE
);
806 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
808 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
812 bp
->bp_op
= OP_BOOTREQUEST
;
813 bp
->bp_htype
= HWT_ETHER
;
814 bp
->bp_hlen
= HWL_ETHER
;
816 bp
->bp_secs
= htons(get_timer(0) / 1000);
817 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
821 * RFC3046 requires Relay Agents to discard packets with
822 * nonzero and offered giaddr
824 NetWriteIP(&bp
->bp_giaddr
, 0);
826 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
829 * ID is the id of the OFFER packet
832 NetCopyLong(&bp
->bp_id
, &bp_offer
->bp_id
);
835 * Copy options from OFFER packet if present
838 /* Copy offered IP into the parameters request list */
839 NetCopyIP(&OfferedIP
, &bp_offer
->bp_yiaddr
);
840 extlen
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_REQUEST
, NetDHCPServerIP
, OfferedIP
);
842 pktlen
= ((int)(pkt
-NetTxPacket
)) + BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
843 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
844 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
846 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
847 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
848 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY
);
849 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
850 NetSendPacket(NetTxPacket
, pktlen
);
854 * Handle DHCP received packets.
857 DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
859 Bootp_t
*bp
= (Bootp_t
*)pkt
;
861 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
862 src
, dest
, len
, dhcp_state
);
864 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
867 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
868 src
, dest
, len
, dhcp_state
);
870 switch (dhcp_state
) {
873 * Wait an appropriate time for any potential DHCPOFFER packets
874 * to arrive. Then select one, and generate DHCPREQUEST response.
875 * If filename is in format we recognize, assume it is a valid
876 * OFFER from a server we want.
878 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
879 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
880 if (strncmp(bp
->bp_file
,
881 CONFIG_SYS_BOOTFILE_PREFIX
,
882 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0 ) {
883 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
885 debug("TRANSITIONING TO REQUESTING STATE\n");
886 dhcp_state
= REQUESTING
;
888 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
889 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
891 NetSetTimeout(TIMEOUT
, BootpTimeout
);
892 DhcpSendRequestPkt(bp
);
893 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
895 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
900 debug("DHCP State: REQUESTING\n");
902 if ( DhcpMessageType((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
905 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
906 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
907 BootpCopyNetParams(bp
); /* Store net params from reply */
909 printf ("DHCP client bound to address %pI4\n", &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 defined(CONFIG_CMD_NFS)
921 } else if (strcmp(s
, "NFS") == 0) {
923 * Use NFS to load the bootfile.
935 /* DHCP client bound to address */
938 puts ("DHCP: INVALID STATE\n");
944 void DhcpRequest(void)
948 #endif /* CONFIG_CMD_DHCP */