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 5UL /* 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 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
*)NetRxPkt
)->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 puts ("NetOurSubnetMask : ");
276 print_IPaddr (NetOurSubnetMask
);
280 if (NetOurGatewayIP
) {
281 puts ("NetOurGatewayIP : ");
282 print_IPaddr (NetOurGatewayIP
);
286 if (NetBootFileSize
) {
287 printf ("NetBootFileSize : %d\n", NetBootFileSize
);
290 if (NetOurHostName
[0]) {
291 printf ("NetOurHostName : %s\n", NetOurHostName
);
294 if (NetOurRootPath
[0]) {
295 printf ("NetOurRootPath : %s\n", NetOurRootPath
);
298 if (NetOurNISDomain
[0]) {
299 printf ("NetOurNISDomain : %s\n", NetOurNISDomain
);
302 if (NetBootFileSize
) {
303 printf ("NetBootFileSize: %d\n", NetBootFileSize
);
305 #endif /* DEBUG_BOOTP_EXT */
308 * Handle a BOOTP received packet.
311 BootpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
316 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n",
317 src
, dest
, len
, sizeof (Bootp_t
));
321 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
325 * Got a good BOOTP reply. Copy the data into our variables.
327 #ifdef CONFIG_STATUS_LED
328 status_led_set (STATUS_LED_BOOT
, STATUS_LED_OFF
);
331 BootpCopyNetParams(bp
); /* Store net parameters from reply */
333 /* Retrieve extended information (we must parse the vendor area) */
334 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
335 BootpVendorProcess((uchar
*)&bp
->bp_vend
[4], len
);
337 NetSetTimeout(0, (thand_f
*)0);
339 debug ("Got good BOOTP\n");
341 if ((s
= getenv("autoload")) != NULL
) {
344 * Just use BOOTP to configure system;
345 * Do not use TFTP to load the bootfile.
347 NetState
= NETLOOP_SUCCESS
;
349 #if defined(CONFIG_CMD_NFS)
350 } else if (strcmp(s
, "NFS") == 0) {
352 * Use NFS to load the bootfile.
365 * Timeout on BOOTP/DHCP request.
370 if (BootpTry
>= TIMEOUT_COUNT
) {
371 puts ("\nRetry count exceeded; starting again\n");
374 NetSetTimeout (TIMEOUT
* CFG_HZ
, BootpTimeout
);
380 * Initialize BOOTP extension fields in the request.
382 #if defined(CONFIG_CMD_DHCP)
383 static int DhcpExtended (u8
* e
, int message_type
, IPaddr_t ServerID
, IPaddr_t RequestedIP
)
388 #if defined(CONFIG_BOOTP_VENDOREX)
391 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
395 *e
++ = 99; /* RFC1048 Magic Cookie */
400 *e
++ = 53; /* DHCP Message Type */
404 *e
++ = 57; /* Maximum DHCP Message Size */
406 *e
++ = (576 - 312 + OPT_SIZE
) >> 8;
407 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
410 int tmp
= ntohl (ServerID
);
412 *e
++ = 54; /* ServerID */
421 int tmp
= ntohl (RequestedIP
);
423 *e
++ = 50; /* Requested IP */
430 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
431 if ((hostname
= getenv ("hostname"))) {
432 int hostnamelen
= strlen (hostname
);
434 *e
++ = 12; /* Hostname */
436 memcpy (e
, hostname
, hostnamelen
);
441 #if defined(CONFIG_BOOTP_VENDOREX)
442 if ((x
= dhcp_vendorex_prep (e
)))
446 *e
++ = 55; /* Parameter Request List */
447 cnt
= e
++; /* Pointer to count of requested items */
449 #if defined(CONFIG_BOOTP_SUBNETMASK)
450 *e
++ = 1; /* Subnet Mask */
453 #if defined(CONFIG_BOOTP_TIMEOFFSET)
457 #if defined(CONFIG_BOOTP_GATEWAY)
458 *e
++ = 3; /* Router Option */
461 #if defined(CONFIG_BOOTP_DNS)
462 *e
++ = 6; /* DNS Server(s) */
465 #if defined(CONFIG_BOOTP_HOSTNAME)
466 *e
++ = 12; /* Hostname */
469 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
470 *e
++ = 13; /* Boot File Size */
473 #if defined(CONFIG_BOOTP_BOOTPATH)
474 *e
++ = 17; /* Boot path */
477 #if defined(CONFIG_BOOTP_NISDOMAIN)
478 *e
++ = 40; /* NIS Domain name request */
481 #if defined(CONFIG_BOOTP_NTPSERVER)
485 *e
++ = 255; /* End of the list */
487 /* Pad to minimal length */
488 #ifdef CONFIG_DHCP_MIN_EXT_LEN
489 while ((e
- start
) <= CONFIG_DHCP_MIN_EXT_LEN
)
498 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
500 static int BootpExtended (u8
* e
)
504 *e
++ = 99; /* RFC1048 Magic Cookie */
509 #if defined(CONFIG_CMD_DHCP)
510 *e
++ = 53; /* DHCP Message Type */
512 *e
++ = DHCP_DISCOVER
;
514 *e
++ = 57; /* Maximum DHCP Message Size */
516 *e
++ = (576 - 312 + OPT_SIZE
) >> 16;
517 *e
++ = (576 - 312 + OPT_SIZE
) & 0xff;
520 #if defined(CONFIG_BOOTP_SUBNETMASK)
521 *e
++ = 1; /* Subnet mask request */
526 #if defined(CONFIG_BOOTP_GATEWAY)
527 *e
++ = 3; /* Default gateway request */
532 #if defined(CONFIG_BOOTP_DNS)
533 *e
++ = 6; /* Domain Name Server */
538 #if defined(CONFIG_BOOTP_HOSTNAME)
539 *e
++ = 12; /* Host name request */
544 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
545 *e
++ = 13; /* Boot file size */
550 #if defined(CONFIG_BOOTP_BOOTPATH)
551 *e
++ = 17; /* Boot path */
556 #if defined(CONFIG_BOOTP_NISDOMAIN)
557 *e
++ = 40; /* NIS Domain name request */
562 *e
++ = 255; /* End of the list */
571 volatile uchar
*pkt
, *iphdr
;
573 int ext_len
, pktlen
, iplen
;
575 #if defined(CONFIG_CMD_DHCP)
579 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
580 unsigned char bi_enetaddr
[6];
584 ulong tst1
, tst2
, sum
, m_mask
, m_value
= 0;
588 reg
= getenv_r ("ethaddr", tmp
, sizeof(tmp
));
589 s
= (reg
> 0) ? tmp
: NULL
;
591 for (reg
=0; reg
<6; ++reg
) {
592 bi_enetaddr
[reg
] = s
? simple_strtoul(s
, &e
, 16) : 0;
598 puts ("BootpRequest => Our Mac: ");
599 for (reg
=0; reg
<6; reg
++) {
602 reg
==5 ? '\n' : ':');
606 /* Mac-Manipulation 2 get seed1 */
609 for (reg
=2; reg
<6; reg
++) {
611 tst1
= tst1
| bi_enetaddr
[reg
];
613 for (reg
=0; reg
<2; reg
++) {
614 tst2
= tst2
| bi_enetaddr
[reg
];
622 for (reg
=1;reg
<=32;reg
++) {
623 m_value
|= (m_mask
& seed1
);
625 m_value
= m_value
<< 1;
631 /* Random Number Generator */
633 for (reg
=0;reg
<=0;reg
++) {
635 if (sum
< seed1
|| sum
< seed2
)
640 if (BootpTry
<=2) { /* Start with max 1024 * 1ms */
641 sum
= sum
>> (22-BootpTry
);
642 } else { /*After 3rd BOOTP request max 8192 * 1ms */
647 printf ("Random delay: %ld ms...\n", sum
);
648 for (reg
=0; reg
<sum
; reg
++) {
649 udelay(1000); /*Wait 1ms*/
651 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
653 printf("BOOTP broadcast %d\n", ++BootpTry
);
655 memset ((void*)pkt
, 0, PKTSIZE
);
657 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
660 * Next line results in incorrect packet size being transmitted, resulting
661 * in errors in some DHCP servers, reporting missing bytes. Size must be
662 * set in packet header after extension length has been determined.
663 * C. Hallinan, DS4.COM, Inc.
665 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
666 iphdr
= pkt
; /* We need this later for NetSetIP() */
670 bp
->bp_op
= OP_BOOTREQUEST
;
671 bp
->bp_htype
= HWT_ETHER
;
672 bp
->bp_hlen
= HWL_ETHER
;
674 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
675 NetWriteIP(&bp
->bp_ciaddr
, 0);
676 NetWriteIP(&bp
->bp_yiaddr
, 0);
677 NetWriteIP(&bp
->bp_siaddr
, 0);
678 NetWriteIP(&bp
->bp_giaddr
, 0);
679 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
680 copy_filename (bp
->bp_file
, BootFile
, sizeof(bp
->bp_file
));
682 /* Request additional information from the BOOTP/DHCP server */
683 #if defined(CONFIG_CMD_DHCP)
684 ext_len
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, 0, 0);
686 ext_len
= BootpExtended((u8
*)bp
->bp_vend
);
690 * Bootp ID is the lower 4 bytes of our ethernet address
691 * plus the current time in HZ.
693 BootpID
= ((ulong
)NetOurEther
[2] << 24)
694 | ((ulong
)NetOurEther
[3] << 16)
695 | ((ulong
)NetOurEther
[4] << 8)
696 | (ulong
)NetOurEther
[5];
697 BootpID
+= get_timer(0);
698 BootpID
= htonl(BootpID
);
699 NetCopyLong(&bp
->bp_id
, &BootpID
);
702 * Calculate proper packet lengths taking into account the
703 * variable size of the options field
705 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
706 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
707 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
708 NetSetTimeout(SELECT_TIMEOUT
* CFG_HZ
, BootpTimeout
);
710 #if defined(CONFIG_CMD_DHCP)
711 dhcp_state
= SELECTING
;
712 NetSetHandler(DhcpHandler
);
714 NetSetHandler(BootpHandler
);
716 NetSendPacket(NetTxPacket
, pktlen
);
719 #if defined(CONFIG_CMD_DHCP)
720 static void DhcpOptionsProcess (uchar
* popt
, Bootp_t
*bp
)
722 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
725 while (popt
< end
&& *popt
!= 0xff) {
729 NetCopyIP (&NetOurSubnetMask
, (popt
+ 2));
731 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
732 case 2: /* Time offset */
733 NetCopyLong ((ulong
*)&NetTimeOffset
, (ulong
*) (popt
+ 2));
734 NetTimeOffset
= ntohl (NetTimeOffset
);
738 NetCopyIP (&NetOurGatewayIP
, (popt
+ 2));
741 NetCopyIP (&NetOurDNSIP
, (popt
+ 2));
742 #if defined(CONFIG_BOOTP_DNS2)
743 if (*(popt
+ 1) > 4) {
744 NetCopyIP (&NetOurDNS2IP
, (popt
+ 2 + 4));
749 size
= truncate_sz ("Host Name", sizeof (NetOurHostName
), oplen
);
750 memcpy (&NetOurHostName
, popt
+ 2, size
);
751 NetOurHostName
[size
] = 0;
753 case 15: /* Ignore Domain Name Option */
756 size
= truncate_sz ("Root Path", sizeof (NetOurRootPath
), oplen
);
757 memcpy (&NetOurRootPath
, popt
+ 2, size
);
758 NetOurRootPath
[size
] = 0;
760 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
761 case 42: /* NTP server IP */
762 NetCopyIP (&NetNtpServerIP
, (popt
+ 2));
766 NetCopyLong (&dhcp_leasetime
, (ulong
*) (popt
+ 2));
768 case 53: /* Ignore Message Type Option */
771 NetCopyIP (&NetDHCPServerIP
, (popt
+ 2));
773 case 58: /* Ignore Renewal Time Option */
775 case 59: /* Ignore Rebinding Time Option */
777 case 66: /* Ignore TFTP server name */
779 case 67: /* vendor opt bootfile */
781 * I can't use dhcp_vendorex_proc here because I need
782 * to write into the bootp packet - even then I had to
783 * pass the bootp packet pointer into here as the
786 size
= truncate_sz ("Opt Boot File",
789 if (bp
->bp_file
[0] == '\0' && size
> 0) {
791 * only use vendor boot file if we didn't
792 * receive a boot file in the main non-vendor
793 * part of the packet - god only knows why
794 * some vendors chose not to use this perfectly
795 * good spot to store the boot file (join on
796 * Tru64 Unix) it seems mind bogglingly crazy
799 printf("*** WARNING: using vendor "
800 "optional boot file\n");
801 memcpy(bp
->bp_file
, popt
+ 2, size
);
802 bp
->bp_file
[size
] = '\0';
806 #if defined(CONFIG_BOOTP_VENDOREX)
807 if (dhcp_vendorex_proc (popt
))
810 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt
);
813 popt
+= oplen
+ 2; /* Process next option */
817 static int DhcpMessageType(unsigned char *popt
)
819 if (NetReadLong((ulong
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
823 while ( *popt
!= 0xff ) {
824 if ( *popt
== 53 ) /* DHCP Message Type */
826 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
831 static void DhcpSendRequestPkt(Bootp_t
*bp_offer
)
833 volatile uchar
*pkt
, *iphdr
;
835 int pktlen
, iplen
, extlen
;
838 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
840 memset ((void*)pkt
, 0, PKTSIZE
);
842 pkt
+= NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
844 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
848 bp
->bp_op
= OP_BOOTREQUEST
;
849 bp
->bp_htype
= HWT_ETHER
;
850 bp
->bp_hlen
= HWL_ETHER
;
852 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
853 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
857 * RFC3046 requires Relay Agents to discard packets with
858 * nonzero and offered giaddr
860 NetWriteIP(&bp
->bp_giaddr
, 0);
862 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
865 * ID is the id of the OFFER packet
868 NetCopyLong(&bp
->bp_id
, &bp_offer
->bp_id
);
871 * Copy options from OFFER packet if present
874 /* Copy offered IP into the parameters request list */
875 NetCopyIP(&OfferedIP
, &bp_offer
->bp_yiaddr
);
876 extlen
= DhcpExtended((u8
*)bp
->bp_vend
, DHCP_REQUEST
, NetDHCPServerIP
, OfferedIP
);
878 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
879 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
880 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
882 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
883 NetSendPacket(NetTxPacket
, pktlen
);
887 * Handle DHCP received packets.
890 DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
892 Bootp_t
*bp
= (Bootp_t
*)pkt
;
894 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
895 src
, dest
, len
, dhcp_state
);
897 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
900 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
901 src
, dest
, len
, dhcp_state
);
903 switch (dhcp_state
) {
906 * Wait an appropriate time for any potential DHCPOFFER packets
907 * to arrive. Then select one, and generate DHCPREQUEST response.
908 * If filename is in format we recognize, assume it is a valid
909 * OFFER from a server we want.
911 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
912 #ifdef CFG_BOOTFILE_PREFIX
913 if (strncmp(bp
->bp_file
,
915 strlen(CFG_BOOTFILE_PREFIX
)) == 0 ) {
916 #endif /* CFG_BOOTFILE_PREFIX */
918 debug ("TRANSITIONING TO REQUESTING STATE\n");
919 dhcp_state
= REQUESTING
;
921 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
922 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
924 BootpCopyNetParams(bp
); /* Store net params from reply */
926 NetSetTimeout(TIMEOUT
* CFG_HZ
, BootpTimeout
);
927 DhcpSendRequestPkt(bp
);
928 #ifdef CFG_BOOTFILE_PREFIX
930 #endif /* CFG_BOOTFILE_PREFIX */
935 debug ("DHCP State: REQUESTING\n");
937 if ( DhcpMessageType((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
940 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
941 DhcpOptionsProcess((u8
*)&bp
->bp_vend
[4], bp
);
942 BootpCopyNetParams(bp
); /* Store net params from reply */
944 puts ("DHCP client bound to address ");
945 print_IPaddr(NetOurIP
);
948 /* Obey the 'autoload' setting */
949 if ((s
= getenv("autoload")) != NULL
) {
952 * Just use BOOTP to configure system;
953 * Do not use TFTP to load the bootfile.
955 NetState
= NETLOOP_SUCCESS
;
957 #if defined(CONFIG_CMD_NFS)
958 } else if (strcmp(s
, "NFS") == 0) {
960 * Use NFS to load the bootfile.
972 puts ("DHCP: INVALID STATE\n");
978 void DhcpRequest(void)
982 #endif /* CONFIG_CMD_DHCP */
984 #endif /* CONFIG_CMD_NET */