]>
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 2000-2002 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...)
27 #ifdef CONFIG_STATUS_LED
28 #include <status_led.h>
31 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
33 #if (CONFIG_COMMANDS & CFG_CMD_NET)
35 #define TIMEOUT 5 /* Seconds before trying BOOTP again */
36 #ifndef CONFIG_NET_RETRY_COUNT
37 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
39 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
42 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
43 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
45 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
46 #define CONFIG_DHCP_MIN_EXT_LEN 64
51 #ifdef CONFIG_BOOTP_RANDOM_DELAY
55 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
56 dhcp_state_t dhcp_state
= INIT
;
57 unsigned long dhcp_leasetime
= 0;
58 IPaddr_t NetDHCPServerIP
= 0;
59 static void DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
);
63 static char *dhcpmsg2str(int type
)
66 case 1: return "DHCPDISCOVER"; break;
67 case 2: return "DHCPOFFER"; break;
68 case 3: return "DHCPREQUEST"; break;
69 case 4: return "DHCPDECLINE"; break;
70 case 5: return "DHCPACK"; break;
71 case 6: return "DHCPNACK"; break;
72 case 7: return "DHCPRELEASE"; break;
73 default: return "UNKNOWN/INVALID MSG TYPE"; break;
78 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
79 extern u8
*dhcp_vendorex_prep (u8
*e
); /*rtn new e after add own opts. */
80 extern u8
*dhcp_vendorex_proc (u8
*e
); /*rtn next e if mine,else NULL */
83 #endif /* CFG_CMD_DHCP */
85 static int BootpCheckPkt(uchar
*pkt
, unsigned dest
, unsigned src
, unsigned len
)
87 Bootp_t
*bp
= (Bootp_t
*) pkt
;
90 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
92 else if (len
< sizeof (Bootp_t
) - OPT_SIZE
)
94 else if (bp
->bp_op
!= OP_BOOTREQUEST
&&
95 bp
->bp_op
!= OP_BOOTREPLY
&&
96 bp
->bp_op
!= DHCP_OFFER
&&
97 bp
->bp_op
!= DHCP_ACK
&&
98 bp
->bp_op
!= DHCP_NAK
) {
101 else if (bp
->bp_htype
!= HWT_ETHER
)
103 else if (bp
->bp_hlen
!= HWL_ETHER
)
105 else if (NetReadLong((ulong
*)&bp
->bp_id
) != BootpID
) {
109 debug ("Filtering pkt = %d\n", retval
);
115 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
117 static void BootpCopyNetParams(Bootp_t
*bp
)
119 NetCopyIP(&NetOurIP
, &bp
->bp_yiaddr
);
120 NetCopyIP(&NetServerIP
, &bp
->bp_siaddr
);
121 memcpy (NetServerEther
, ((Ethernet_t
*)NetRxPkt
)->et_src
, 6);
122 copy_filename (BootFile
, bp
->bp_file
, sizeof(BootFile
));
124 debug ("Bootfile: %s\n", BootFile
);
126 /* Propagate to environment:
127 * don't delete exising entry when BOOTP / DHCP reply does
128 * not contain a new value
131 setenv ("bootfile", BootFile
);
135 static int truncate_sz (const char *name
, int maxlen
, int curlen
)
137 if (curlen
>= maxlen
) {
138 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
139 name
, curlen
, maxlen
);
145 #if !(CONFIG_COMMANDS & CFG_CMD_DHCP)
147 static void BootpVendorFieldProcess(u8
*ext
)
149 int size
= *(ext
+1) ;
151 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
, *(ext
+1));
156 /* Fixed length fields */
157 case 1: /* Subnet mask */
158 if (NetOurSubnetMask
== 0)
159 NetCopyIP(&NetOurSubnetMask
, (IPaddr_t
*)(ext
+2));
161 case 2: /* Time offset - Not yet supported */
163 /* Variable length fields */
164 case 3: /* Gateways list */
165 if (NetOurGatewayIP
== 0) {
166 NetCopyIP(&NetOurGatewayIP
, (IPaddr_t
*)(ext
+2));
169 case 4: /* Time server - Not yet supported */
171 case 5: /* IEN-116 name server - Not yet supported */
174 if (NetOurDNSIP
== 0) {
175 NetCopyIP(&NetOurDNSIP
, (IPaddr_t
*)(ext
+2));
178 case 7: /* Log server - Not yet supported */
180 case 8: /* Cookie/Quote server - Not yet supported */
182 case 9: /* LPR server - Not yet supported */
184 case 10: /* Impress server - Not yet supported */
186 case 11: /* RPL server - Not yet supported */
188 case 12: /* Host name */
189 if (NetOurHostName
[0] == 0) {
190 size
= truncate_sz("Host Name", sizeof(NetOurHostName
), size
);
191 memcpy(&NetOurHostName
, ext
+2, size
);
192 NetOurHostName
[size
] = 0 ;
195 case 13: /* Boot file size */
197 NetBootFileSize
= ntohs(*(ushort
*)(ext
+2));
199 NetBootFileSize
= ntohl(*(ulong
*)(ext
+2));
201 case 14: /* Merit dump file - Not yet supported */
203 case 15: /* Domain name - Not yet supported */
205 case 16: /* Swap server - Not yet supported */
207 case 17: /* Root path */
208 if (NetOurRootPath
[0] == 0) {
209 size
= truncate_sz("Root Path", sizeof(NetOurRootPath
), size
);
210 memcpy(&NetOurRootPath
, ext
+2, size
);
211 NetOurRootPath
[size
] = 0 ;
214 case 18: /* Extension path - Not yet supported */
216 * This can be used to send the information of the
217 * vendor area in another file that the client can
221 /* IP host layer fields */
222 case 40: /* NIS Domain name */
223 if (NetOurNISDomain
[0] == 0) {
224 size
= truncate_sz ("NIS Domain Name",
225 sizeof(NetOurNISDomain
),
227 memcpy(&NetOurNISDomain
, ext
+2, size
);
228 NetOurNISDomain
[size
] = 0 ;
231 /* Application layer fields */
232 case 43: /* Vendor specific info - Not yet supported */
234 * Binary information to exchange specific
235 * product information.
238 /* Reserved (custom) fields (128..254) */
242 static void BootpVendorProcess(u8
*ext
, int size
)
244 u8
*end
= ext
+ size
;
246 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size
);
248 while ((ext
< end
) && (*ext
!= 0xff)) {
255 BootpVendorFieldProcess (opt
) ;
259 #ifdef DEBUG_BOOTP_EXT
260 printf("[BOOTP] Received fields: \n");
261 if (NetOurSubnetMask
) {
262 puts ("NetOurSubnetMask : ");
263 print_IPaddr (NetOurSubnetMask
);
267 if (NetOurGatewayIP
) {
268 puts ("NetOurGatewayIP : ");
269 print_IPaddr (NetOurGatewayIP
);
273 if (NetBootFileSize
) {
274 printf("NetBootFileSize : %d\n", NetBootFileSize
);
277 if (NetOurHostName
[0]) {
278 printf("NetOurHostName : %s\n", NetOurHostName
);
281 if (NetOurRootPath
[0]) {
282 printf("NetOurRootPath : %s\n", NetOurRootPath
);
285 if (NetOurNISDomain
[0]) {
286 printf("NetOurNISDomain : %s\n", NetOurNISDomain
);
289 if (NetBootFileSize
) {
290 printf("NetBootFileSize: %d\n", NetBootFileSize
);
292 #endif /* DEBUG_BOOTP_EXT */
296 * Handle a BOOTP received packet.
299 BootpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
304 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n",
305 src
, dest
, len
, sizeof (Bootp_t
));
309 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
313 * Got a good BOOTP reply. Copy the data into our variables.
315 #ifdef CONFIG_STATUS_LED
316 status_led_set (STATUS_LED_BOOT
, STATUS_LED_OFF
);
319 BootpCopyNetParams(bp
); /* Store net parameters from reply */
321 /* Retrieve extended information (we must parse the vendor area) */
322 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
323 BootpVendorProcess(&bp
->bp_vend
[4], len
);
325 NetSetTimeout(0, (thand_f
*)0);
327 debug ("Got good BOOTP\n");
329 if (((s
= getenv("autoload")) != NULL
) && (*s
== 'n')) {
331 * Just use BOOTP to configure system;
332 * Do not use TFTP to load the bootfile.
334 NetState
= NETLOOP_SUCCESS
;
340 #endif /* !CFG_CMD_DHCP */
343 * Timeout on BOOTP/DHCP request.
348 if (BootpTry
>= TIMEOUT_COUNT
) {
349 puts ("\nRetry count exceeded; starting again\n");
352 NetSetTimeout (TIMEOUT
* CFG_HZ
, BootpTimeout
);
358 * Initialize BOOTP extension fields in the request.
360 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
361 static int DhcpExtended(u8
*e
, int message_type
, IPaddr_t ServerID
, IPaddr_t RequestedIP
)
365 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
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 */
405 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
406 if ((x
= dhcp_vendorex_prep (e
)))
410 *e
++ = 55; /* Parameter Request List */
411 cnt
= e
++; /* Pointer to count of requested items */
413 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
414 *e
++ = 1; /* Subnet Mask */
417 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
418 *e
++ = 3; /* Router Option */
421 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
422 *e
++ = 6; /* DNS Server(s) */
425 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
426 *e
++ = 12; /* Hostname */
429 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
430 *e
++ = 13; /* Boot File Size */
433 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
434 *e
++ = 17; /* Boot path */
437 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
438 *e
++ = 40; /* NIS Domain name request */
441 *e
++ = 255; /* End of the list */
443 /* Pad to minimal length */
444 #ifdef CONFIG_DHCP_MIN_EXT_LEN
445 while ((e
- start
) <= CONFIG_DHCP_MIN_EXT_LEN
)
452 #else /* CFG_CMD_DHCP */
454 * Warning: no field size check - change CONFIG_BOOTP_MASK at your own risk!
456 static int BootpExtended (u8
*e
)
460 *e
++ = 99; /* RFC1048 Magic Cookie */
465 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
466 *e
++ = 53; /* DHCP Message Type */
468 *e
++ = DHCP_DISCOVER
;
470 *e
++ = 57; /* Maximum DHCP Message Size */
472 *e
++ = (576-312+OPT_SIZE
) >> 16;
473 *e
++ = (576-312+OPT_SIZE
) & 0xff;
474 #endif /* CFG_CMD_DHCP */
476 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
477 *e
++ = 1; /* Subnet mask request */
482 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
483 *e
++ = 3; /* Default gateway request */
488 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
489 *e
++ = 6; /* Domain Name Server */
494 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
495 *e
++ = 12; /* Host name request */
500 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
501 *e
++ = 13; /* Boot file size */
506 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
507 *e
++ = 17; /* Boot path */
512 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
513 *e
++ = 40; /* NIS Domain name request */
518 *e
++ = 255; /* End of the list */
522 #endif /* CFG_CMD_DHCP */
527 volatile uchar
*pkt
, *iphdr
;
529 int ext_len
, pktlen
, iplen
;
531 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
535 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
536 unsigned char bi_enetaddr
[6];
540 ulong tst1
, tst2
, sum
, m_mask
, m_value
= 0;
544 reg
= getenv_r ("ethaddr", tmp
, sizeof(tmp
));
545 s
= (reg
> 0) ? tmp
: NULL
;
547 for (reg
=0; reg
<6; ++reg
) {
548 bi_enetaddr
[reg
] = s
? simple_strtoul(s
, &e
, 16) : 0;
554 printf("BootpRequest => Our Mac: ");
555 for (reg
=0; reg
<6; reg
++) {
558 reg
==5 ? '\n' : ':');
562 /* Mac-Manipulation 2 get seed1 */
565 for (reg
=2; reg
<6; reg
++) {
567 tst1
= tst1
| bi_enetaddr
[reg
];
569 for (reg
=0; reg
<2; reg
++) {
570 tst2
= tst2
| bi_enetaddr
[reg
];
578 for (reg
=1;reg
<=32;reg
++) {
579 m_value
|= (m_mask
& seed1
);
581 m_value
= m_value
<< 1;
587 /* Random Number Generator */
589 for (reg
=0;reg
<=0;reg
++) {
591 if (sum
< seed1
|| sum
< seed2
)
596 if (BootpTry
<=2) { /* Start with max 1024 * 1ms */
597 sum
= sum
>> (22-BootpTry
);
598 } else { /*After 3rd BOOTP request max 8192 * 1ms */
603 printf ("Random delay: %ld ms...\n", sum
);
604 for (reg
=0; reg
<sum
; reg
++) {
605 udelay(1000); /*Wait 1ms*/
607 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
609 printf("BOOTP broadcast %d\n", ++BootpTry
);
611 memset ((void*)pkt
, 0, PKTSIZE
);
613 NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
614 pkt
+= ETHER_HDR_SIZE
;
617 * Next line results in incorrect packet size being transmitted, resulting
618 * in errors in some DHCP servers, reporting missing bytes. Size must be
619 * set in packet header after extension length has been determined.
620 * C. Hallinan, DS4.COM, Inc.
622 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
623 iphdr
= pkt
; /* We need this later for NetSetIP() */
627 bp
->bp_op
= OP_BOOTREQUEST
;
628 bp
->bp_htype
= HWT_ETHER
;
629 bp
->bp_hlen
= HWL_ETHER
;
631 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
632 NetWriteIP(&bp
->bp_ciaddr
, 0);
633 NetWriteIP(&bp
->bp_yiaddr
, 0);
634 NetWriteIP(&bp
->bp_siaddr
, 0);
635 NetWriteIP(&bp
->bp_giaddr
, 0);
636 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
637 copy_filename (bp
->bp_file
, BootFile
, sizeof(bp
->bp_file
));
639 /* Request additional information from the BOOTP/DHCP server */
640 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
641 ext_len
= DhcpExtended(bp
->bp_vend
, DHCP_DISCOVER
, 0, 0);
643 ext_len
= BootpExtended(bp
->bp_vend
);
644 #endif /* CFG_CMD_DHCP */
647 * Bootp ID is the lower 4 bytes of our ethernet address
648 * plus the current time in HZ.
650 BootpID
= ((ulong
)NetOurEther
[2] << 24)
651 | ((ulong
)NetOurEther
[3] << 16)
652 | ((ulong
)NetOurEther
[4] << 8)
653 | (ulong
)NetOurEther
[5];
654 BootpID
+= get_timer(0);
655 BootpID
= htonl(BootpID
);
656 NetCopyLong(&bp
->bp_id
, &BootpID
);
659 * Calculate proper packet lengths taking into account the
660 * variable size of the options field
662 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
663 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + ext_len
;
664 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
665 NetSetTimeout(SELECT_TIMEOUT
* CFG_HZ
, BootpTimeout
);
667 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
668 dhcp_state
= SELECTING
;
669 NetSetHandler(DhcpHandler
);
671 NetSetHandler(BootpHandler
);
672 #endif /* CFG_CMD_DHCP */
673 NetSendPacket(NetTxPacket
, pktlen
);
676 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
677 static void DhcpOptionsProcess(uchar
*popt
)
679 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
682 while ( popt
< end
&& *popt
!= 0xff ) {
686 NetCopyIP(&NetOurSubnetMask
, (popt
+2));
689 NetCopyIP(&NetOurGatewayIP
, (popt
+2));
692 NetCopyIP(&NetOurDNSIP
, (popt
+2));
695 size
= truncate_sz ("Host Name",
696 sizeof(NetOurHostName
),
698 memcpy(&NetOurHostName
, popt
+2, size
);
699 NetOurHostName
[size
] = 0 ;
701 case 15: /* Ignore Domain Name Option */
704 size
= truncate_sz ("Root Path",
705 sizeof(NetOurRootPath
),
707 memcpy(&NetOurRootPath
, popt
+2, size
);
708 NetOurRootPath
[size
] = 0 ;
711 NetCopyLong (&dhcp_leasetime
, (ulong
*)(popt
+ 2));
713 case 53: /* Ignore Message Type Option */
716 NetCopyIP(&NetDHCPServerIP
, (popt
+2));
718 case 58: /* Ignore Renewal Time Option */
720 case 59: /* Ignore Rebinding Time Option */
723 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
724 if (dhcp_vendorex_proc(popt
))
727 printf("*** Unhandled DHCP Option in OFFER/ACK: %d\n",
731 popt
+= oplen
+ 2; /* Process next option */
735 static int DhcpMessageType(unsigned char *popt
)
737 if (NetReadLong((ulong
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
741 while ( *popt
!= 0xff ) {
742 if ( *popt
== 53 ) /* DHCP Message Type */
744 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
749 static void DhcpSendRequestPkt(Bootp_t
*bp_offer
)
751 volatile uchar
*pkt
, *iphdr
;
753 int pktlen
, iplen
, extlen
;
756 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
758 memset ((void*)pkt
, 0, PKTSIZE
);
760 NetSetEther(pkt
, NetBcastAddr
, PROT_IP
);
761 pkt
+= ETHER_HDR_SIZE
;
763 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
767 bp
->bp_op
= OP_BOOTREQUEST
;
768 bp
->bp_htype
= HWT_ETHER
;
769 bp
->bp_hlen
= HWL_ETHER
;
771 bp
->bp_secs
= htons(get_timer(0) / CFG_HZ
);
772 NetCopyIP(&bp
->bp_ciaddr
, &bp_offer
->bp_ciaddr
); /* both in network byte order */
773 NetCopyIP(&bp
->bp_yiaddr
, &bp_offer
->bp_yiaddr
);
774 NetCopyIP(&bp
->bp_siaddr
, &bp_offer
->bp_siaddr
);
775 NetCopyIP(&bp
->bp_giaddr
, &bp_offer
->bp_giaddr
);
776 memcpy (bp
->bp_chaddr
, NetOurEther
, 6);
779 * ID is the id of the OFFER packet
782 NetCopyLong(&bp
->bp_id
, &bp_offer
->bp_id
);
785 * Copy options from OFFER packet if present
787 NetCopyIP(&OfferedIP
, &bp
->bp_yiaddr
);
788 extlen
= DhcpExtended(bp
->bp_vend
, DHCP_REQUEST
, NetDHCPServerIP
, OfferedIP
);
790 pktlen
= BOOTP_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
791 iplen
= BOOTP_HDR_SIZE
- sizeof(bp
->bp_vend
) + extlen
;
792 NetSetIP(iphdr
, 0xFFFFFFFFL
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
794 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
795 NetSendPacket(NetTxPacket
, pktlen
);
799 * Handle DHCP received packets.
802 DhcpHandler(uchar
* pkt
, unsigned dest
, unsigned src
, unsigned len
)
804 Bootp_t
*bp
= (Bootp_t
*)pkt
;
806 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
807 src
, dest
, len
, dhcp_state
);
809 if (BootpCheckPkt(pkt
, dest
, src
, len
)) /* Filter out pkts we don't want */
812 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
813 src
, dest
, len
, dhcp_state
);
815 switch (dhcp_state
) {
818 * Wait an appropriate time for any potential DHCPOFFER packets
819 * to arrive. Then select one, and generate DHCPREQUEST response.
820 * If filename is in format we recognize, assume it is a valid
821 * OFFER from a server we want.
823 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
824 #ifdef CFG_BOOTFILE_PREFIX
825 if (strncmp(bp
->bp_file
,
827 strlen(CFG_BOOTFILE_PREFIX
)) == 0 ) {
828 #endif /* CFG_BOOTFILE_PREFIX */
830 debug ("TRANSITIONING TO REQUESTING STATE\n");
831 dhcp_state
= REQUESTING
;
833 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
834 DhcpOptionsProcess(&bp
->bp_vend
[4]);
836 BootpCopyNetParams(bp
); /* Store net params from reply */
838 NetSetTimeout(TIMEOUT
* CFG_HZ
, BootpTimeout
);
839 DhcpSendRequestPkt(bp
);
840 #ifdef CFG_BOOTFILE_PREFIX
842 #endif /* CFG_BOOTFILE_PREFIX */
847 debug ("DHCP State: REQUESTING\n");
849 if ( DhcpMessageType(bp
->bp_vend
) == DHCP_ACK
) {
852 if (NetReadLong((ulong
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
853 DhcpOptionsProcess(&bp
->bp_vend
[4]);
854 BootpCopyNetParams(bp
); /* Store net params from reply */
856 printf("DHCP client bound to address ");
857 print_IPaddr(NetOurIP
);
860 /* Obey the 'autoload' setting */
861 if (((s
= getenv("autoload")) != NULL
) && (*s
== 'n')) {
862 NetState
= NETLOOP_SUCCESS
;
870 printf("DHCP: INVALID STATE\n");
876 void DhcpRequest(void)
880 #endif /* CFG_CMD_DHCP */
882 #endif /* CFG_CMD_NET */