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 u8 dhcp_option_overload
;
68 #define OVERLOAD_FILE 1
69 #define OVERLOAD_SNAME 2
70 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
71 unsigned src
, unsigned len
);
75 static char *dhcpmsg2str(int type
)
78 case 1: return "DHCPDISCOVER"; break;
79 case 2: return "DHCPOFFER"; break;
80 case 3: return "DHCPREQUEST"; break;
81 case 4: return "DHCPDECLINE"; break;
82 case 5: return "DHCPACK"; break;
83 case 6: return "DHCPNACK"; break;
84 case 7: return "DHCPRELEASE"; break;
85 default: return "UNKNOWN/INVALID MSG TYPE"; break;
91 static void bootp_add_id(ulong id
)
93 if (bootp_num_ids
>= ARRAY_SIZE(bootp_ids
)) {
94 size_t size
= sizeof(bootp_ids
) - sizeof(id
);
96 memmove(bootp_ids
, &bootp_ids
[1], size
);
97 bootp_ids
[bootp_num_ids
- 1] = id
;
99 bootp_ids
[bootp_num_ids
] = id
;
104 static bool bootp_match_id(ulong id
)
108 for (i
= 0; i
< bootp_num_ids
; i
++)
109 if (bootp_ids
[i
] == id
)
115 static int check_reply_packet(uchar
*pkt
, unsigned dest
, unsigned src
,
118 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
121 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
123 else if (len
< sizeof(struct bootp_hdr
) - OPT_FIELD_SIZE
)
125 else if (bp
->bp_op
!= OP_BOOTREPLY
)
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);
153 #if defined(CONFIG_CMD_DHCP)
154 !(dhcp_option_overload
& OVERLOAD_FILE
) &&
156 (strlen(bp
->bp_file
) > 0)) {
157 copy_filename(net_boot_file_name
, bp
->bp_file
,
158 sizeof(net_boot_file_name
));
161 debug("net_boot_file_name: %s\n", net_boot_file_name
);
163 /* Propagate to environment:
164 * don't delete exising entry when BOOTP / DHCP reply does
165 * not contain a new value
167 if (*net_boot_file_name
)
168 setenv("bootfile", net_boot_file_name
);
170 net_copy_ip(&net_ip
, &bp
->bp_yiaddr
);
173 static int truncate_sz(const char *name
, int maxlen
, int curlen
)
175 if (curlen
>= maxlen
) {
176 printf("*** WARNING: %s is too long (%d - max: %d)"
177 " - truncated\n", name
, curlen
, maxlen
);
183 #if !defined(CONFIG_CMD_DHCP)
185 static void bootp_process_vendor_field(u8
*ext
)
187 int size
= *(ext
+ 1);
189 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
192 net_boot_file_expected_size_in_blocks
= 0;
195 /* Fixed length fields */
196 case 1: /* Subnet mask */
197 if (net_netmask
.s_addr
== 0)
198 net_copy_ip(&net_netmask
, (struct in_addr
*)(ext
+ 2));
200 case 2: /* Time offset - Not yet supported */
202 /* Variable length fields */
203 case 3: /* Gateways list */
204 if (net_gateway
.s_addr
== 0)
205 net_copy_ip(&net_gateway
, (struct in_addr
*)(ext
+ 2));
207 case 4: /* Time server - Not yet supported */
209 case 5: /* IEN-116 name server - Not yet supported */
212 if (net_dns_server
.s_addr
== 0)
213 net_copy_ip(&net_dns_server
,
214 (struct in_addr
*)(ext
+ 2));
215 #if defined(CONFIG_BOOTP_DNS2)
216 if ((net_dns_server2
.s_addr
== 0) && (size
> 4))
217 net_copy_ip(&net_dns_server2
,
218 (struct in_addr
*)(ext
+ 2 + 4));
221 case 7: /* Log server - Not yet supported */
223 case 8: /* Cookie/Quote server - Not yet supported */
225 case 9: /* LPR server - Not yet supported */
227 case 10: /* Impress server - Not yet supported */
229 case 11: /* RPL server - Not yet supported */
231 case 12: /* Host name */
232 if (net_hostname
[0] == 0) {
233 size
= truncate_sz("Host Name",
234 sizeof(net_hostname
), size
);
235 memcpy(&net_hostname
, ext
+ 2, size
);
236 net_hostname
[size
] = 0;
239 case 13: /* Boot file size */
241 net_boot_file_expected_size_in_blocks
=
242 ntohs(*(ushort
*)(ext
+ 2));
244 net_boot_file_expected_size_in_blocks
=
245 ntohl(*(ulong
*)(ext
+ 2));
247 case 14: /* Merit dump file - Not yet supported */
249 case 15: /* Domain name - Not yet supported */
251 case 16: /* Swap server - Not yet supported */
253 case 17: /* Root path */
254 if (net_root_path
[0] == 0) {
255 size
= truncate_sz("Root Path",
256 sizeof(net_root_path
), size
);
257 memcpy(&net_root_path
, ext
+ 2, size
);
258 net_root_path
[size
] = 0;
261 case 18: /* Extension path - Not yet supported */
263 * This can be used to send the information of the
264 * vendor area in another file that the client can
268 /* IP host layer fields */
269 case 40: /* NIS Domain name */
270 if (net_nis_domain
[0] == 0) {
271 size
= truncate_sz("NIS Domain Name",
272 sizeof(net_nis_domain
), size
);
273 memcpy(&net_nis_domain
, ext
+ 2, size
);
274 net_nis_domain
[size
] = 0;
277 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
278 case 42: /* NTP server IP */
279 net_copy_ip(&net_ntp_server
, (struct in_addr
*)(ext
+ 2));
282 /* Application layer fields */
283 case 43: /* Vendor specific info - Not yet supported */
285 * Binary information to exchange specific
286 * product information.
289 /* Reserved (custom) fields (128..254) */
293 static void bootp_process_vendor(u8
*ext
, int size
)
295 u8
*end
= ext
+ size
;
297 debug("[BOOTP] Checking extension (%d bytes)...\n", size
);
299 while ((ext
< end
) && (*ext
!= 0xff)) {
307 bootp_process_vendor_field(opt
);
311 debug("[BOOTP] Received fields:\n");
312 if (net_netmask
.s_addr
)
313 debug("net_netmask : %pI4\n", &net_netmask
);
315 if (net_gateway
.s_addr
)
316 debug("net_gateway : %pI4", &net_gateway
);
318 if (net_boot_file_expected_size_in_blocks
)
319 debug("net_boot_file_expected_size_in_blocks : %d\n",
320 net_boot_file_expected_size_in_blocks
);
323 debug("net_hostname : %s\n", net_hostname
);
325 if (net_root_path
[0])
326 debug("net_root_path : %s\n", net_root_path
);
328 if (net_nis_domain
[0])
329 debug("net_nis_domain : %s\n", net_nis_domain
);
331 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
333 debug("net_ntp_server : %pI4\n", &net_ntp_server
);
338 * Handle a BOOTP received packet.
340 static void bootp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
341 unsigned src
, unsigned len
)
343 struct bootp_hdr
*bp
;
345 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
346 src
, dest
, len
, sizeof(struct bootp_hdr
));
348 bp
= (struct bootp_hdr
*)pkt
;
350 /* Filter out pkts we don't want */
351 if (check_reply_packet(pkt
, dest
, src
, len
))
355 * Got a good BOOTP reply. Copy the data into our variables.
357 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
358 status_led_set(STATUS_LED_BOOT
, STATUS_LED_OFF
);
361 store_net_params(bp
); /* Store net parameters from reply */
363 /* Retrieve extended information (we must parse the vendor area) */
364 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
365 bootp_process_vendor((uchar
*)&bp
->bp_vend
[4], len
);
367 net_set_timeout_handler(0, (thand_f
*)0);
368 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
, "bootp_stop");
370 debug("Got good BOOTP\n");
377 * Timeout on BOOTP/DHCP request.
379 static void bootp_timeout_handler(void)
381 ulong time_taken
= get_timer(bootp_start
);
383 if (time_taken
>= TIMEOUT_MS
) {
384 #ifdef CONFIG_BOOTP_MAY_FAIL
385 puts("\nRetry time exceeded\n");
386 net_set_state(NETLOOP_FAIL
);
388 puts("\nRetry time exceeded; starting again\n");
393 if (bootp_timeout
> 2000)
394 bootp_timeout
= 2000;
395 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
400 #define put_vci(e, str) \
402 size_t vci_strlen = strlen(str); \
403 *e++ = 60; /* Vendor Class Identifier */ \
405 memcpy(e, str, vci_strlen); \
410 * Initialize BOOTP extension fields in the request.
412 #if defined(CONFIG_CMD_DHCP)
413 static int dhcp_extended(u8
*e
, int message_type
, struct in_addr server_ip
,
414 struct in_addr requested_ip
)
418 #if defined(CONFIG_BOOTP_PXE)
423 #if defined(CONFIG_BOOTP_VENDOREX)
426 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
430 *e
++ = 99; /* RFC1048 Magic Cookie */
435 *e
++ = 53; /* DHCP Message Type */
439 *e
++ = 57; /* Maximum DHCP Message Size */
441 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 8;
442 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
444 if (server_ip
.s_addr
) {
445 int tmp
= ntohl(server_ip
.s_addr
);
447 *e
++ = 54; /* ServerID */
455 if (requested_ip
.s_addr
) {
456 int tmp
= ntohl(requested_ip
.s_addr
);
458 *e
++ = 50; /* Requested IP */
465 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
466 hostname
= getenv("hostname");
468 int hostnamelen
= strlen(hostname
);
470 *e
++ = 12; /* Hostname */
472 memcpy(e
, hostname
, hostnamelen
);
477 #if defined(CONFIG_BOOTP_PXE)
478 clientarch
= CONFIG_BOOTP_PXE_CLIENTARCH
;
479 *e
++ = 93; /* Client System Architecture */
481 *e
++ = (clientarch
>> 8) & 0xff;
482 *e
++ = clientarch
& 0xff;
484 *e
++ = 94; /* Client Network Interface Identifier */
486 *e
++ = 1; /* type field for UNDI */
487 *e
++ = 0; /* major revision */
488 *e
++ = 0; /* minor revision */
490 uuid
= getenv("pxeuuid");
493 if (uuid_str_valid(uuid
)) {
494 *e
++ = 97; /* Client Machine Identifier */
496 *e
++ = 0; /* type 0 - UUID */
498 uuid_str_to_bin(uuid
, e
, UUID_STR_FORMAT_STD
);
501 printf("Invalid pxeuuid: %s\n", uuid
);
506 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
507 put_vci(e
, CONFIG_SPL_NET_VCI_STRING
);
508 #elif defined(CONFIG_BOOTP_VCI_STRING)
509 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
512 #if defined(CONFIG_BOOTP_VENDOREX)
513 x
= dhcp_vendorex_prep(e
);
518 *e
++ = 55; /* Parameter Request List */
519 cnt
= e
++; /* Pointer to count of requested items */
521 #if defined(CONFIG_BOOTP_SUBNETMASK)
522 *e
++ = 1; /* Subnet Mask */
525 #if defined(CONFIG_BOOTP_TIMEOFFSET)
529 #if defined(CONFIG_BOOTP_GATEWAY)
530 *e
++ = 3; /* Router Option */
533 #if defined(CONFIG_BOOTP_DNS)
534 *e
++ = 6; /* DNS Server(s) */
537 #if defined(CONFIG_BOOTP_HOSTNAME)
538 *e
++ = 12; /* Hostname */
541 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
542 *e
++ = 13; /* Boot File Size */
545 #if defined(CONFIG_BOOTP_BOOTPATH)
546 *e
++ = 17; /* Boot path */
549 #if defined(CONFIG_BOOTP_NISDOMAIN)
550 *e
++ = 40; /* NIS Domain name request */
553 #if defined(CONFIG_BOOTP_NTPSERVER)
557 /* no options, so back up to avoid sending an empty request list */
561 *e
++ = 255; /* End of the list */
563 /* Pad to minimal length */
564 #ifdef CONFIG_DHCP_MIN_EXT_LEN
565 while ((e
- start
) < CONFIG_DHCP_MIN_EXT_LEN
)
574 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
576 static int bootp_extended(u8
*e
)
580 *e
++ = 99; /* RFC1048 Magic Cookie */
585 #if defined(CONFIG_CMD_DHCP)
586 *e
++ = 53; /* DHCP Message Type */
588 *e
++ = DHCP_DISCOVER
;
590 *e
++ = 57; /* Maximum DHCP Message Size */
592 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 16;
593 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
596 #if defined(CONFIG_BOOTP_VCI_STRING) || \
597 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING))
598 #ifdef CONFIG_SPL_BUILD
599 put_vci(e
, CONFIG_SPL_NET_VCI_STRING
);
601 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
605 #if defined(CONFIG_BOOTP_SUBNETMASK)
606 *e
++ = 1; /* Subnet mask request */
611 #if defined(CONFIG_BOOTP_GATEWAY)
612 *e
++ = 3; /* Default gateway request */
617 #if defined(CONFIG_BOOTP_DNS)
618 *e
++ = 6; /* Domain Name Server */
623 #if defined(CONFIG_BOOTP_HOSTNAME)
624 *e
++ = 12; /* Host name request */
629 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
630 *e
++ = 13; /* Boot file size */
635 #if defined(CONFIG_BOOTP_BOOTPATH)
636 *e
++ = 17; /* Boot path */
641 #if defined(CONFIG_BOOTP_NISDOMAIN)
642 *e
++ = 40; /* NIS Domain name request */
646 #if defined(CONFIG_BOOTP_NTPSERVER)
652 *e
++ = 255; /* End of the list */
658 void bootp_reset(void)
662 bootp_start
= get_timer(0);
666 void bootp_request(void)
669 struct bootp_hdr
*bp
;
670 int extlen
, pktlen
, iplen
;
672 #ifdef CONFIG_BOOTP_RANDOM_DELAY
676 struct in_addr zero_ip
;
677 struct in_addr bcast_ip
;
679 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START
, "bootp_start");
680 #if defined(CONFIG_CMD_DHCP)
684 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
688 if (bootp_try
<= 2) /* Start with max 1024 * 1ms */
689 rand_ms
= rand() >> (22 - bootp_try
);
690 else /* After 3rd BOOTP request max 8192 * 1ms */
691 rand_ms
= rand() >> 19;
693 printf("Random delay: %ld ms...\n", rand_ms
);
696 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
698 printf("BOOTP broadcast %d\n", ++bootp_try
);
700 memset((void *)pkt
, 0, PKTSIZE
);
702 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
706 * Next line results in incorrect packet size being transmitted,
707 * resulting in errors in some DHCP servers, reporting missing bytes.
708 * Size must be set in packet header after extension length has been
710 * C. Hallinan, DS4.COM, Inc.
712 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
713 sizeof (struct bootp_hdr)); */
714 iphdr
= pkt
; /* We need this later for net_set_udp_header() */
715 pkt
+= IP_UDP_HDR_SIZE
;
717 bp
= (struct bootp_hdr
*)pkt
;
718 bp
->bp_op
= OP_BOOTREQUEST
;
719 bp
->bp_htype
= HWT_ETHER
;
720 bp
->bp_hlen
= HWL_ETHER
;
723 * according to RFC1542, should be 0 on first request, secs since
724 * first request otherwise
726 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
728 net_write_ip(&bp
->bp_ciaddr
, zero_ip
);
729 net_write_ip(&bp
->bp_yiaddr
, zero_ip
);
730 net_write_ip(&bp
->bp_siaddr
, zero_ip
);
731 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
732 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
733 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
735 /* Request additional information from the BOOTP/DHCP server */
736 #if defined(CONFIG_CMD_DHCP)
737 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, zero_ip
,
740 extlen
= bootp_extended((u8
*)bp
->bp_vend
);
744 * Bootp ID is the lower 4 bytes of our ethernet address
745 * plus the current time in ms.
747 bootp_id
= ((u32
)net_ethaddr
[2] << 24)
748 | ((u32
)net_ethaddr
[3] << 16)
749 | ((u32
)net_ethaddr
[4] << 8)
750 | (u32
)net_ethaddr
[5];
751 bootp_id
+= get_timer(0);
752 bootp_id
= htonl(bootp_id
);
753 bootp_add_id(bootp_id
);
754 net_copy_u32(&bp
->bp_id
, &bootp_id
);
757 * Calculate proper packet lengths taking into account the
758 * variable size of the options field
760 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
761 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
762 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
763 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
764 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
766 #if defined(CONFIG_CMD_DHCP)
767 dhcp_state
= SELECTING
;
768 net_set_udp_handler(dhcp_handler
);
770 net_set_udp_handler(bootp_handler
);
772 net_send_packet(net_tx_packet
, pktlen
);
775 #if defined(CONFIG_CMD_DHCP)
776 static void dhcp_process_options(uchar
*popt
, uchar
*end
)
779 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
783 while (popt
< end
&& *popt
!= 0xff) {
787 oplen
= -1; /* Pad omits len byte */
790 net_copy_ip(&net_netmask
, (popt
+ 2));
792 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
793 case 2: /* Time offset */
794 to_ptr
= &net_ntp_time_offset
;
795 net_copy_u32((u32
*)to_ptr
, (u32
*)(popt
+ 2));
796 net_ntp_time_offset
= ntohl(net_ntp_time_offset
);
800 net_copy_ip(&net_gateway
, (popt
+ 2));
803 net_copy_ip(&net_dns_server
, (popt
+ 2));
804 #if defined(CONFIG_BOOTP_DNS2)
806 net_copy_ip(&net_dns_server2
, (popt
+ 2 + 4));
810 size
= truncate_sz("Host Name",
811 sizeof(net_hostname
), oplen
);
812 memcpy(&net_hostname
, popt
+ 2, size
);
813 net_hostname
[size
] = 0;
815 case 15: /* Ignore Domain Name Option */
818 size
= truncate_sz("Root Path",
819 sizeof(net_root_path
), oplen
);
820 memcpy(&net_root_path
, popt
+ 2, size
);
821 net_root_path
[size
] = 0;
823 case 28: /* Ignore Broadcast Address Option */
825 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
826 case 42: /* NTP server IP */
827 net_copy_ip(&net_ntp_server
, (popt
+ 2));
831 net_copy_u32(&dhcp_leasetime
, (u32
*)(popt
+ 2));
834 dhcp_option_overload
= popt
[2];
836 case 53: /* Ignore Message Type Option */
839 net_copy_ip(&dhcp_server_ip
, (popt
+ 2));
841 case 58: /* Ignore Renewal Time Option */
843 case 59: /* Ignore Rebinding Time Option */
845 case 66: /* Ignore TFTP server name */
847 case 67: /* Bootfile option */
848 size
= truncate_sz("Bootfile",
849 sizeof(net_boot_file_name
), oplen
);
850 memcpy(&net_boot_file_name
, popt
+ 2, size
);
851 net_boot_file_name
[size
] = 0;
854 #if defined(CONFIG_BOOTP_VENDOREX)
855 if (dhcp_vendorex_proc(popt
))
858 printf("*** Unhandled DHCP Option in OFFER/ACK:"
862 popt
+= oplen
+ 2; /* Process next option */
866 static void dhcp_packet_process_options(struct bootp_hdr
*bp
)
868 uchar
*popt
= (uchar
*)&bp
->bp_vend
[4];
869 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
871 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) != htonl(BOOTP_VENDOR_MAGIC
))
874 dhcp_option_overload
= 0;
877 * The 'options' field MUST be interpreted first, 'file' next,
880 dhcp_process_options(popt
, end
);
882 if (dhcp_option_overload
& OVERLOAD_FILE
) {
883 popt
= (uchar
*)bp
->bp_file
;
884 end
= popt
+ sizeof(bp
->bp_file
);
885 dhcp_process_options(popt
, end
);
888 if (dhcp_option_overload
& OVERLOAD_SNAME
) {
889 popt
= (uchar
*)bp
->bp_sname
;
890 end
= popt
+ sizeof(bp
->bp_sname
);
891 dhcp_process_options(popt
, end
);
895 static int dhcp_message_type(unsigned char *popt
)
897 if (net_read_u32((u32
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
901 while (*popt
!= 0xff) {
902 if (*popt
== 53) /* DHCP Message Type */
908 /* Scan through all options */
909 popt
+= *(popt
+ 1) + 2;
915 static void dhcp_send_request_packet(struct bootp_hdr
*bp_offer
)
918 struct bootp_hdr
*bp
;
919 int pktlen
, iplen
, extlen
;
921 struct in_addr offered_ip
;
922 struct in_addr zero_ip
;
923 struct in_addr bcast_ip
;
925 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
927 memset((void *)pkt
, 0, PKTSIZE
);
929 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
932 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
933 pkt
+= IP_UDP_HDR_SIZE
;
935 bp
= (struct bootp_hdr
*)pkt
;
936 bp
->bp_op
= OP_BOOTREQUEST
;
937 bp
->bp_htype
= HWT_ETHER
;
938 bp
->bp_hlen
= HWL_ETHER
;
940 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
941 /* Do not set the client IP, your IP, or server IP yet, since it
942 * hasn't been ACK'ed by the server yet */
945 * RFC3046 requires Relay Agents to discard packets with
946 * nonzero and offered giaddr
949 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
951 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
954 * ID is the id of the OFFER packet
957 net_copy_u32(&bp
->bp_id
, &bp_offer
->bp_id
);
960 * Copy options from OFFER packet if present
963 /* Copy offered IP into the parameters request list */
964 net_copy_ip(&offered_ip
, &bp_offer
->bp_yiaddr
);
965 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_REQUEST
,
966 dhcp_server_ip
, offered_ip
);
968 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
969 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
970 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
971 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
973 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
974 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY
);
975 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
976 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
977 net_send_packet(net_tx_packet
, pktlen
);
981 * Handle DHCP received packets.
983 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
984 unsigned src
, unsigned len
)
986 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
988 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
989 src
, dest
, len
, dhcp_state
);
991 /* Filter out pkts we don't want */
992 if (check_reply_packet(pkt
, dest
, src
, len
))
995 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
996 "%d\n", src
, dest
, len
, dhcp_state
);
998 switch (dhcp_state
) {
1001 * Wait an appropriate time for any potential DHCPOFFER packets
1002 * to arrive. Then select one, and generate DHCPREQUEST
1003 * response. If filename is in format we recognize, assume it
1004 * is a valid OFFER from a server we want.
1006 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
1007 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1008 if (strncmp(bp
->bp_file
,
1009 CONFIG_SYS_BOOTFILE_PREFIX
,
1010 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0) {
1011 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1012 dhcp_packet_process_options(bp
);
1014 debug("TRANSITIONING TO REQUESTING STATE\n");
1015 dhcp_state
= REQUESTING
;
1017 net_set_timeout_handler(5000, bootp_timeout_handler
);
1018 dhcp_send_request_packet(bp
);
1019 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1021 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1026 debug("DHCP State: REQUESTING\n");
1028 if (dhcp_message_type((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
1029 dhcp_packet_process_options(bp
);
1030 /* Store net params from reply */
1031 store_net_params(bp
);
1033 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1034 &net_ip
, get_timer(bootp_start
));
1035 net_set_timeout_handler(0, (thand_f
*)0);
1036 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
,
1044 /* DHCP client bound to address */
1047 puts("DHCP: INVALID STATE\n");
1052 void dhcp_request(void)
1056 #endif /* CONFIG_CMD_DHCP */