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>
20 #ifdef CONFIG_BOOTP_RANDOM_DELAY
24 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
27 * The timeout for the initial BOOTP/DHCP request used to be described by a
28 * counter of fixed-length timeout periods. TIMEOUT_COUNT represents
31 * Now that the timeout periods are variable (exponential backoff and retry)
32 * we convert the timeout count to the absolute time it would have take to
33 * execute that many retries, and keep sending retry packets until that time
36 #ifndef CONFIG_NET_RETRY_COUNT
37 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
39 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
41 #define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000)
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
50 #ifndef CONFIG_BOOTP_ID_CACHE_SIZE
51 #define CONFIG_BOOTP_ID_CACHE_SIZE 4
54 u32 bootp_ids
[CONFIG_BOOTP_ID_CACHE_SIZE
];
55 unsigned int bootp_num_ids
;
59 char net_nis_domain
[32] = {0,}; /* Our NIS domain */
60 char net_hostname
[32] = {0,}; /* Our hostname */
61 char net_root_path
[64] = {0,}; /* Our bootpath */
63 #if defined(CONFIG_CMD_DHCP)
64 static dhcp_state_t dhcp_state
= INIT
;
65 static u32 dhcp_leasetime
;
66 static struct in_addr dhcp_server_ip
;
67 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
68 unsigned src
, unsigned len
);
72 static char *dhcpmsg2str(int type
)
75 case 1: return "DHCPDISCOVER"; break;
76 case 2: return "DHCPOFFER"; break;
77 case 3: return "DHCPREQUEST"; break;
78 case 4: return "DHCPDECLINE"; break;
79 case 5: return "DHCPACK"; break;
80 case 6: return "DHCPNACK"; break;
81 case 7: return "DHCPRELEASE"; break;
82 default: return "UNKNOWN/INVALID MSG TYPE"; break;
88 static void bootp_add_id(ulong id
)
90 if (bootp_num_ids
>= ARRAY_SIZE(bootp_ids
)) {
91 size_t size
= sizeof(bootp_ids
) - sizeof(id
);
93 memmove(bootp_ids
, &bootp_ids
[1], size
);
94 bootp_ids
[bootp_num_ids
- 1] = id
;
96 bootp_ids
[bootp_num_ids
] = id
;
101 static bool bootp_match_id(ulong id
)
105 for (i
= 0; i
< bootp_num_ids
; i
++)
106 if (bootp_ids
[i
] == id
)
112 static int check_packet(uchar
*pkt
, unsigned dest
, unsigned src
, unsigned len
)
114 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
117 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
119 else if (len
< sizeof(struct bootp_hdr
) - OPT_FIELD_SIZE
)
121 else if (bp
->bp_op
!= OP_BOOTREQUEST
&&
122 bp
->bp_op
!= OP_BOOTREPLY
&&
123 bp
->bp_op
!= DHCP_OFFER
&&
124 bp
->bp_op
!= DHCP_ACK
&&
125 bp
->bp_op
!= DHCP_NAK
)
127 else if (bp
->bp_htype
!= HWT_ETHER
)
129 else if (bp
->bp_hlen
!= HWL_ETHER
)
131 else if (!bootp_match_id(net_read_u32(&bp
->bp_id
)))
134 debug("Filtering pkt = %d\n", retval
);
140 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
142 static void store_net_params(struct bootp_hdr
*bp
)
144 #if !defined(CONFIG_BOOTP_SERVERIP)
145 struct in_addr tmp_ip
;
147 net_copy_ip(&tmp_ip
, &bp
->bp_siaddr
);
148 if (tmp_ip
.s_addr
!= 0)
149 net_copy_ip(&net_server_ip
, &bp
->bp_siaddr
);
150 memcpy(net_server_ethaddr
,
151 ((struct ethernet_hdr
*)net_rx_packet
)->et_src
, 6);
152 if (strlen(bp
->bp_file
) > 0)
153 copy_filename(net_boot_file_name
, bp
->bp_file
,
154 sizeof(net_boot_file_name
));
156 debug("net_boot_file_name: %s\n", net_boot_file_name
);
158 /* Propagate to environment:
159 * don't delete exising entry when BOOTP / DHCP reply does
160 * not contain a new value
162 if (*net_boot_file_name
)
163 setenv("bootfile", net_boot_file_name
);
165 net_copy_ip(&net_ip
, &bp
->bp_yiaddr
);
168 static int truncate_sz(const char *name
, int maxlen
, int curlen
)
170 if (curlen
>= maxlen
) {
171 printf("*** WARNING: %s is too long (%d - max: %d)"
172 " - truncated\n", name
, curlen
, maxlen
);
178 #if !defined(CONFIG_CMD_DHCP)
180 static void bootp_process_vendor_field(u8
*ext
)
182 int size
= *(ext
+ 1);
184 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
187 net_boot_file_expected_size_in_blocks
= 0;
190 /* Fixed length fields */
191 case 1: /* Subnet mask */
192 if (net_netmask
.s_addr
== 0)
193 net_copy_ip(&net_netmask
, (struct in_addr
*)(ext
+ 2));
195 case 2: /* Time offset - Not yet supported */
197 /* Variable length fields */
198 case 3: /* Gateways list */
199 if (net_gateway
.s_addr
== 0)
200 net_copy_ip(&net_gateway
, (struct in_addr
*)(ext
+ 2));
202 case 4: /* Time server - Not yet supported */
204 case 5: /* IEN-116 name server - Not yet supported */
207 if (net_dns_server
.s_addr
== 0)
208 net_copy_ip(&net_dns_server
,
209 (struct in_addr
*)(ext
+ 2));
210 #if defined(CONFIG_BOOTP_DNS2)
211 if ((net_dns_server2
.s_addr
== 0) && (size
> 4))
212 net_copy_ip(&net_dns_server2
,
213 (struct in_addr
*)(ext
+ 2 + 4));
216 case 7: /* Log server - Not yet supported */
218 case 8: /* Cookie/Quote server - Not yet supported */
220 case 9: /* LPR server - Not yet supported */
222 case 10: /* Impress server - Not yet supported */
224 case 11: /* RPL server - Not yet supported */
226 case 12: /* Host name */
227 if (net_hostname
[0] == 0) {
228 size
= truncate_sz("Host Name",
229 sizeof(net_hostname
), size
);
230 memcpy(&net_hostname
, ext
+ 2, size
);
231 net_hostname
[size
] = 0;
234 case 13: /* Boot file size */
236 net_boot_file_expected_size_in_blocks
=
237 ntohs(*(ushort
*)(ext
+ 2));
239 net_boot_file_expected_size_in_blocks
=
240 ntohl(*(ulong
*)(ext
+ 2));
242 case 14: /* Merit dump file - Not yet supported */
244 case 15: /* Domain name - Not yet supported */
246 case 16: /* Swap server - Not yet supported */
248 case 17: /* Root path */
249 if (net_root_path
[0] == 0) {
250 size
= truncate_sz("Root Path",
251 sizeof(net_root_path
), size
);
252 memcpy(&net_root_path
, ext
+ 2, size
);
253 net_root_path
[size
] = 0;
256 case 18: /* Extension path - Not yet supported */
258 * This can be used to send the information of the
259 * vendor area in another file that the client can
263 /* IP host layer fields */
264 case 40: /* NIS Domain name */
265 if (net_nis_domain
[0] == 0) {
266 size
= truncate_sz("NIS Domain Name",
267 sizeof(net_nis_domain
), size
);
268 memcpy(&net_nis_domain
, ext
+ 2, size
);
269 net_nis_domain
[size
] = 0;
272 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
273 case 42: /* NTP server IP */
274 net_copy_ip(&net_ntp_server
, (struct in_addr
*)(ext
+ 2));
277 /* Application layer fields */
278 case 43: /* Vendor specific info - Not yet supported */
280 * Binary information to exchange specific
281 * product information.
284 /* Reserved (custom) fields (128..254) */
288 static void bootp_process_vendor(u8
*ext
, int size
)
290 u8
*end
= ext
+ size
;
292 debug("[BOOTP] Checking extension (%d bytes)...\n", size
);
294 while ((ext
< end
) && (*ext
!= 0xff)) {
302 bootp_process_vendor_field(opt
);
306 debug("[BOOTP] Received fields:\n");
307 if (net_netmask
.s_addr
)
308 debug("net_netmask : %pI4\n", &net_netmask
);
310 if (net_gateway
.s_addr
)
311 debug("net_gateway : %pI4", &net_gateway
);
313 if (net_boot_file_expected_size_in_blocks
)
314 debug("net_boot_file_expected_size_in_blocks : %d\n",
315 net_boot_file_expected_size_in_blocks
);
318 debug("net_hostname : %s\n", net_hostname
);
320 if (net_root_path
[0])
321 debug("net_root_path : %s\n", net_root_path
);
323 if (net_nis_domain
[0])
324 debug("net_nis_domain : %s\n", net_nis_domain
);
326 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
328 debug("net_ntp_server : %pI4\n", &net_ntp_server
);
333 * Handle a BOOTP received packet.
335 static void bootp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
336 unsigned src
, unsigned len
)
338 struct bootp_hdr
*bp
;
340 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
341 src
, dest
, len
, sizeof(struct bootp_hdr
));
343 bp
= (struct bootp_hdr
*)pkt
;
345 /* Filter out pkts we don't want */
346 if (check_packet(pkt
, dest
, src
, len
))
350 * Got a good BOOTP reply. Copy the data into our variables.
352 #ifdef CONFIG_STATUS_LED
353 status_led_set(STATUS_LED_BOOT
, STATUS_LED_OFF
);
356 store_net_params(bp
); /* Store net parameters from reply */
358 /* Retrieve extended information (we must parse the vendor area) */
359 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
360 bootp_process_vendor((uchar
*)&bp
->bp_vend
[4], len
);
362 net_set_timeout_handler(0, (thand_f
*)0);
363 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
, "bootp_stop");
365 debug("Got good BOOTP\n");
372 * Timeout on BOOTP/DHCP request.
374 static void bootp_timeout_handler(void)
376 ulong time_taken
= get_timer(bootp_start
);
378 if (time_taken
>= TIMEOUT_MS
) {
379 #ifdef CONFIG_BOOTP_MAY_FAIL
380 puts("\nRetry time exceeded\n");
381 net_set_state(NETLOOP_FAIL
);
383 puts("\nRetry time exceeded; starting again\n");
388 if (bootp_timeout
> 2000)
389 bootp_timeout
= 2000;
390 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
395 #define put_vci(e, str) \
397 size_t vci_strlen = strlen(str); \
398 *e++ = 60; /* Vendor Class Identifier */ \
400 memcpy(e, str, vci_strlen); \
405 * Initialize BOOTP extension fields in the request.
407 #if defined(CONFIG_CMD_DHCP)
408 static int dhcp_extended(u8
*e
, int message_type
, struct in_addr server_ip
,
409 struct in_addr requested_ip
)
413 #if defined(CONFIG_BOOTP_PXE)
418 #if defined(CONFIG_BOOTP_VENDOREX)
421 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
425 *e
++ = 99; /* RFC1048 Magic Cookie */
430 *e
++ = 53; /* DHCP Message Type */
434 *e
++ = 57; /* Maximum DHCP Message Size */
436 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 8;
437 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
439 if (server_ip
.s_addr
) {
440 int tmp
= ntohl(server_ip
.s_addr
);
442 *e
++ = 54; /* ServerID */
450 if (requested_ip
.s_addr
) {
451 int tmp
= ntohl(requested_ip
.s_addr
);
453 *e
++ = 50; /* Requested IP */
460 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
461 hostname
= getenv("hostname");
463 int hostnamelen
= strlen(hostname
);
465 *e
++ = 12; /* Hostname */
467 memcpy(e
, hostname
, hostnamelen
);
472 #if defined(CONFIG_BOOTP_PXE)
473 clientarch
= CONFIG_BOOTP_PXE_CLIENTARCH
;
474 *e
++ = 93; /* Client System Architecture */
476 *e
++ = (clientarch
>> 8) & 0xff;
477 *e
++ = clientarch
& 0xff;
479 *e
++ = 94; /* Client Network Interface Identifier */
481 *e
++ = 1; /* type field for UNDI */
482 *e
++ = 0; /* major revision */
483 *e
++ = 0; /* minor revision */
485 uuid
= getenv("pxeuuid");
488 if (uuid_str_valid(uuid
)) {
489 *e
++ = 97; /* Client Machine Identifier */
491 *e
++ = 0; /* type 0 - UUID */
493 uuid_str_to_bin(uuid
, e
, UUID_STR_FORMAT_STD
);
496 printf("Invalid pxeuuid: %s\n", uuid
);
501 #ifdef CONFIG_BOOTP_VCI_STRING
502 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
505 #if defined(CONFIG_BOOTP_VENDOREX)
506 x
= dhcp_vendorex_prep(e
);
511 *e
++ = 55; /* Parameter Request List */
512 cnt
= e
++; /* Pointer to count of requested items */
514 #if defined(CONFIG_BOOTP_SUBNETMASK)
515 *e
++ = 1; /* Subnet Mask */
518 #if defined(CONFIG_BOOTP_TIMEOFFSET)
522 #if defined(CONFIG_BOOTP_GATEWAY)
523 *e
++ = 3; /* Router Option */
526 #if defined(CONFIG_BOOTP_DNS)
527 *e
++ = 6; /* DNS Server(s) */
530 #if defined(CONFIG_BOOTP_HOSTNAME)
531 *e
++ = 12; /* Hostname */
534 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
535 *e
++ = 13; /* Boot File Size */
538 #if defined(CONFIG_BOOTP_BOOTPATH)
539 *e
++ = 17; /* Boot path */
542 #if defined(CONFIG_BOOTP_NISDOMAIN)
543 *e
++ = 40; /* NIS Domain name request */
546 #if defined(CONFIG_BOOTP_NTPSERVER)
550 /* no options, so back up to avoid sending an empty request list */
554 *e
++ = 255; /* End of the list */
556 /* Pad to minimal length */
557 #ifdef CONFIG_DHCP_MIN_EXT_LEN
558 while ((e
- start
) < CONFIG_DHCP_MIN_EXT_LEN
)
567 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
569 static int bootp_extended(u8
*e
)
573 *e
++ = 99; /* RFC1048 Magic Cookie */
578 #if defined(CONFIG_CMD_DHCP)
579 *e
++ = 53; /* DHCP Message Type */
581 *e
++ = DHCP_DISCOVER
;
583 *e
++ = 57; /* Maximum DHCP Message Size */
585 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 16;
586 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
589 #if defined(CONFIG_BOOTP_VCI_STRING) || \
590 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING))
591 #ifdef CONFIG_SPL_BUILD
592 put_vci(e
, CONFIG_SPL_NET_VCI_STRING
);
594 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
598 #if defined(CONFIG_BOOTP_SUBNETMASK)
599 *e
++ = 1; /* Subnet mask request */
604 #if defined(CONFIG_BOOTP_GATEWAY)
605 *e
++ = 3; /* Default gateway request */
610 #if defined(CONFIG_BOOTP_DNS)
611 *e
++ = 6; /* Domain Name Server */
616 #if defined(CONFIG_BOOTP_HOSTNAME)
617 *e
++ = 12; /* Host name request */
622 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
623 *e
++ = 13; /* Boot file size */
628 #if defined(CONFIG_BOOTP_BOOTPATH)
629 *e
++ = 17; /* Boot path */
634 #if defined(CONFIG_BOOTP_NISDOMAIN)
635 *e
++ = 40; /* NIS Domain name request */
639 #if defined(CONFIG_BOOTP_NTPSERVER)
645 *e
++ = 255; /* End of the list */
651 void bootp_reset(void)
655 bootp_start
= get_timer(0);
659 void bootp_request(void)
662 struct bootp_hdr
*bp
;
663 int extlen
, pktlen
, iplen
;
665 #ifdef CONFIG_BOOTP_RANDOM_DELAY
669 struct in_addr zero_ip
;
670 struct in_addr bcast_ip
;
672 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START
, "bootp_start");
673 #if defined(CONFIG_CMD_DHCP)
677 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
681 if (bootp_try
<= 2) /* Start with max 1024 * 1ms */
682 rand_ms
= rand() >> (22 - bootp_try
);
683 else /* After 3rd BOOTP request max 8192 * 1ms */
684 rand_ms
= rand() >> 19;
686 printf("Random delay: %ld ms...\n", rand_ms
);
689 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
691 printf("BOOTP broadcast %d\n", ++bootp_try
);
693 memset((void *)pkt
, 0, PKTSIZE
);
695 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
699 * Next line results in incorrect packet size being transmitted,
700 * resulting in errors in some DHCP servers, reporting missing bytes.
701 * Size must be set in packet header after extension length has been
703 * C. Hallinan, DS4.COM, Inc.
705 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
706 sizeof (struct bootp_hdr)); */
707 iphdr
= pkt
; /* We need this later for net_set_udp_header() */
708 pkt
+= IP_UDP_HDR_SIZE
;
710 bp
= (struct bootp_hdr
*)pkt
;
711 bp
->bp_op
= OP_BOOTREQUEST
;
712 bp
->bp_htype
= HWT_ETHER
;
713 bp
->bp_hlen
= HWL_ETHER
;
715 bp
->bp_secs
= htons(get_timer(0) / 1000);
717 net_write_ip(&bp
->bp_ciaddr
, zero_ip
);
718 net_write_ip(&bp
->bp_yiaddr
, zero_ip
);
719 net_write_ip(&bp
->bp_siaddr
, zero_ip
);
720 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
721 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
722 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
724 /* Request additional information from the BOOTP/DHCP server */
725 #if defined(CONFIG_CMD_DHCP)
726 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, zero_ip
,
729 extlen
= bootp_extended((u8
*)bp
->bp_vend
);
733 * Bootp ID is the lower 4 bytes of our ethernet address
734 * plus the current time in ms.
736 bootp_id
= ((u32
)net_ethaddr
[2] << 24)
737 | ((u32
)net_ethaddr
[3] << 16)
738 | ((u32
)net_ethaddr
[4] << 8)
739 | (u32
)net_ethaddr
[5];
740 bootp_id
+= get_timer(0);
741 bootp_id
= htonl(bootp_id
);
742 bootp_add_id(bootp_id
);
743 net_copy_u32(&bp
->bp_id
, &bootp_id
);
746 * Calculate proper packet lengths taking into account the
747 * variable size of the options field
749 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
750 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
751 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
752 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
753 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
755 #if defined(CONFIG_CMD_DHCP)
756 dhcp_state
= SELECTING
;
757 net_set_udp_handler(dhcp_handler
);
759 net_set_udp_handler(bootp_handler
);
761 net_send_packet(net_tx_packet
, pktlen
);
764 #if defined(CONFIG_CMD_DHCP)
765 static void dhcp_process_options(uchar
*popt
, struct bootp_hdr
*bp
)
767 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
769 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
773 while (popt
< end
&& *popt
!= 0xff) {
777 net_copy_ip(&net_netmask
, (popt
+ 2));
779 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
780 case 2: /* Time offset */
781 to_ptr
= &net_ntp_time_offset
;
782 net_copy_u32((u32
*)to_ptr
, (u32
*)(popt
+ 2));
783 net_ntp_time_offset
= ntohl(net_ntp_time_offset
);
787 net_copy_ip(&net_gateway
, (popt
+ 2));
790 net_copy_ip(&net_dns_server
, (popt
+ 2));
791 #if defined(CONFIG_BOOTP_DNS2)
793 net_copy_ip(&net_dns_server2
, (popt
+ 2 + 4));
797 size
= truncate_sz("Host Name",
798 sizeof(net_hostname
), oplen
);
799 memcpy(&net_hostname
, popt
+ 2, size
);
800 net_hostname
[size
] = 0;
802 case 15: /* Ignore Domain Name Option */
805 size
= truncate_sz("Root Path",
806 sizeof(net_root_path
), oplen
);
807 memcpy(&net_root_path
, popt
+ 2, size
);
808 net_root_path
[size
] = 0;
810 case 28: /* Ignore Broadcast Address Option */
812 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
813 case 42: /* NTP server IP */
814 net_copy_ip(&net_ntp_server
, (popt
+ 2));
818 net_copy_u32(&dhcp_leasetime
, (u32
*)(popt
+ 2));
820 case 53: /* Ignore Message Type Option */
823 net_copy_ip(&dhcp_server_ip
, (popt
+ 2));
825 case 58: /* Ignore Renewal Time Option */
827 case 59: /* Ignore Rebinding Time Option */
829 case 66: /* Ignore TFTP server name */
831 case 67: /* vendor opt bootfile */
833 * I can't use dhcp_vendorex_proc here because I need
834 * to write into the bootp packet - even then I had to
835 * pass the bootp packet pointer into here as the
838 size
= truncate_sz("Opt Boot File",
841 if (bp
->bp_file
[0] == '\0' && size
> 0) {
843 * only use vendor boot file if we didn't
844 * receive a boot file in the main non-vendor
845 * part of the packet - god only knows why
846 * some vendors chose not to use this perfectly
847 * good spot to store the boot file (join on
848 * Tru64 Unix) it seems mind bogglingly crazy
851 printf("*** WARNING: using vendor "
852 "optional boot file\n");
853 memcpy(bp
->bp_file
, popt
+ 2, size
);
854 bp
->bp_file
[size
] = '\0';
858 #if defined(CONFIG_BOOTP_VENDOREX)
859 if (dhcp_vendorex_proc(popt
))
862 printf("*** Unhandled DHCP Option in OFFER/ACK:"
866 popt
+= oplen
+ 2; /* Process next option */
870 static int dhcp_message_type(unsigned char *popt
)
872 if (net_read_u32((u32
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
876 while (*popt
!= 0xff) {
877 if (*popt
== 53) /* DHCP Message Type */
879 popt
+= *(popt
+ 1) + 2; /* Scan through all options */
884 static void dhcp_send_request_packet(struct bootp_hdr
*bp_offer
)
887 struct bootp_hdr
*bp
;
888 int pktlen
, iplen
, extlen
;
890 struct in_addr offered_ip
;
891 struct in_addr zero_ip
;
892 struct in_addr bcast_ip
;
894 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
896 memset((void *)pkt
, 0, PKTSIZE
);
898 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
901 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
902 pkt
+= IP_UDP_HDR_SIZE
;
904 bp
= (struct bootp_hdr
*)pkt
;
905 bp
->bp_op
= OP_BOOTREQUEST
;
906 bp
->bp_htype
= HWT_ETHER
;
907 bp
->bp_hlen
= HWL_ETHER
;
909 bp
->bp_secs
= htons(get_timer(0) / 1000);
910 /* Do not set the client IP, your IP, or server IP yet, since it
911 * hasn't been ACK'ed by the server yet */
914 * RFC3046 requires Relay Agents to discard packets with
915 * nonzero and offered giaddr
918 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
920 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
923 * ID is the id of the OFFER packet
926 net_copy_u32(&bp
->bp_id
, &bp_offer
->bp_id
);
929 * Copy options from OFFER packet if present
932 /* Copy offered IP into the parameters request list */
933 net_copy_ip(&offered_ip
, &bp_offer
->bp_yiaddr
);
934 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_REQUEST
,
935 dhcp_server_ip
, offered_ip
);
937 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
938 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
939 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
940 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
942 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
943 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY
);
944 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
945 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
946 net_send_packet(net_tx_packet
, pktlen
);
950 * Handle DHCP received packets.
952 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
953 unsigned src
, unsigned len
)
955 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
957 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
958 src
, dest
, len
, dhcp_state
);
960 /* Filter out pkts we don't want */
961 if (check_packet(pkt
, dest
, src
, len
))
964 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
965 "%d\n", src
, dest
, len
, dhcp_state
);
967 switch (dhcp_state
) {
970 * Wait an appropriate time for any potential DHCPOFFER packets
971 * to arrive. Then select one, and generate DHCPREQUEST
972 * response. If filename is in format we recognize, assume it
973 * is a valid OFFER from a server we want.
975 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
976 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
977 if (strncmp(bp
->bp_file
,
978 CONFIG_SYS_BOOTFILE_PREFIX
,
979 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0) {
980 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
982 debug("TRANSITIONING TO REQUESTING STATE\n");
983 dhcp_state
= REQUESTING
;
985 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) ==
986 htonl(BOOTP_VENDOR_MAGIC
))
987 dhcp_process_options((u8
*)&bp
->bp_vend
[4], bp
);
989 net_set_timeout_handler(5000, bootp_timeout_handler
);
990 dhcp_send_request_packet(bp
);
991 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
993 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
998 debug("DHCP State: REQUESTING\n");
1000 if (dhcp_message_type((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
1001 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) ==
1002 htonl(BOOTP_VENDOR_MAGIC
))
1003 dhcp_process_options((u8
*)&bp
->bp_vend
[4], bp
);
1004 /* Store net params from reply */
1005 store_net_params(bp
);
1007 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1008 &net_ip
, get_timer(bootp_start
));
1009 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
,
1017 /* DHCP client bound to address */
1020 puts("DHCP: INVALID STATE\n");
1025 void dhcp_request(void)
1029 #endif /* CONFIG_CMD_DHCP */