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 static ulong time_taken_max
;
65 #if defined(CONFIG_CMD_DHCP)
66 static dhcp_state_t dhcp_state
= INIT
;
67 static u32 dhcp_leasetime
;
68 static struct in_addr dhcp_server_ip
;
69 static u8 dhcp_option_overload
;
70 #define OVERLOAD_FILE 1
71 #define OVERLOAD_SNAME 2
72 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
73 unsigned src
, unsigned len
);
77 static char *dhcpmsg2str(int type
)
80 case 1: return "DHCPDISCOVER"; break;
81 case 2: return "DHCPOFFER"; break;
82 case 3: return "DHCPREQUEST"; break;
83 case 4: return "DHCPDECLINE"; break;
84 case 5: return "DHCPACK"; break;
85 case 6: return "DHCPNACK"; break;
86 case 7: return "DHCPRELEASE"; break;
87 default: return "UNKNOWN/INVALID MSG TYPE"; break;
93 static void bootp_add_id(ulong id
)
95 if (bootp_num_ids
>= ARRAY_SIZE(bootp_ids
)) {
96 size_t size
= sizeof(bootp_ids
) - sizeof(id
);
98 memmove(bootp_ids
, &bootp_ids
[1], size
);
99 bootp_ids
[bootp_num_ids
- 1] = id
;
101 bootp_ids
[bootp_num_ids
] = id
;
106 static bool bootp_match_id(ulong id
)
110 for (i
= 0; i
< bootp_num_ids
; i
++)
111 if (bootp_ids
[i
] == id
)
117 static int check_reply_packet(uchar
*pkt
, unsigned dest
, unsigned src
,
120 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
123 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
125 else if (len
< sizeof(struct bootp_hdr
) - OPT_FIELD_SIZE
)
127 else if (bp
->bp_op
!= OP_BOOTREPLY
)
129 else if (bp
->bp_htype
!= HWT_ETHER
)
131 else if (bp
->bp_hlen
!= HWL_ETHER
)
133 else if (!bootp_match_id(net_read_u32(&bp
->bp_id
)))
135 else if (memcmp(bp
->bp_chaddr
, net_ethaddr
, HWL_ETHER
) != 0)
138 debug("Filtering pkt = %d\n", retval
);
144 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
146 static void store_net_params(struct bootp_hdr
*bp
)
148 #if !defined(CONFIG_BOOTP_SERVERIP)
149 struct in_addr tmp_ip
;
151 net_copy_ip(&tmp_ip
, &bp
->bp_siaddr
);
152 if (tmp_ip
.s_addr
!= 0)
153 net_copy_ip(&net_server_ip
, &bp
->bp_siaddr
);
154 memcpy(net_server_ethaddr
,
155 ((struct ethernet_hdr
*)net_rx_packet
)->et_src
, 6);
157 #if defined(CONFIG_CMD_DHCP)
158 !(dhcp_option_overload
& OVERLOAD_FILE
) &&
160 (strlen(bp
->bp_file
) > 0)) {
161 copy_filename(net_boot_file_name
, bp
->bp_file
,
162 sizeof(net_boot_file_name
));
165 debug("net_boot_file_name: %s\n", net_boot_file_name
);
167 /* Propagate to environment:
168 * don't delete exising entry when BOOTP / DHCP reply does
169 * not contain a new value
171 if (*net_boot_file_name
)
172 setenv("bootfile", net_boot_file_name
);
174 net_copy_ip(&net_ip
, &bp
->bp_yiaddr
);
177 static int truncate_sz(const char *name
, int maxlen
, int curlen
)
179 if (curlen
>= maxlen
) {
180 printf("*** WARNING: %s is too long (%d - max: %d)"
181 " - truncated\n", name
, curlen
, maxlen
);
187 #if !defined(CONFIG_CMD_DHCP)
189 static void bootp_process_vendor_field(u8
*ext
)
191 int size
= *(ext
+ 1);
193 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
196 net_boot_file_expected_size_in_blocks
= 0;
199 /* Fixed length fields */
200 case 1: /* Subnet mask */
201 if (net_netmask
.s_addr
== 0)
202 net_copy_ip(&net_netmask
, (struct in_addr
*)(ext
+ 2));
204 case 2: /* Time offset - Not yet supported */
206 /* Variable length fields */
207 case 3: /* Gateways list */
208 if (net_gateway
.s_addr
== 0)
209 net_copy_ip(&net_gateway
, (struct in_addr
*)(ext
+ 2));
211 case 4: /* Time server - Not yet supported */
213 case 5: /* IEN-116 name server - Not yet supported */
216 if (net_dns_server
.s_addr
== 0)
217 net_copy_ip(&net_dns_server
,
218 (struct in_addr
*)(ext
+ 2));
219 #if defined(CONFIG_BOOTP_DNS2)
220 if ((net_dns_server2
.s_addr
== 0) && (size
> 4))
221 net_copy_ip(&net_dns_server2
,
222 (struct in_addr
*)(ext
+ 2 + 4));
225 case 7: /* Log server - Not yet supported */
227 case 8: /* Cookie/Quote server - Not yet supported */
229 case 9: /* LPR server - Not yet supported */
231 case 10: /* Impress server - Not yet supported */
233 case 11: /* RPL server - Not yet supported */
235 case 12: /* Host name */
236 if (net_hostname
[0] == 0) {
237 size
= truncate_sz("Host Name",
238 sizeof(net_hostname
), size
);
239 memcpy(&net_hostname
, ext
+ 2, size
);
240 net_hostname
[size
] = 0;
243 case 13: /* Boot file size */
245 net_boot_file_expected_size_in_blocks
=
246 ntohs(*(ushort
*)(ext
+ 2));
248 net_boot_file_expected_size_in_blocks
=
249 ntohl(*(ulong
*)(ext
+ 2));
251 case 14: /* Merit dump file - Not yet supported */
253 case 15: /* Domain name - Not yet supported */
255 case 16: /* Swap server - Not yet supported */
257 case 17: /* Root path */
258 if (net_root_path
[0] == 0) {
259 size
= truncate_sz("Root Path",
260 sizeof(net_root_path
), size
);
261 memcpy(&net_root_path
, ext
+ 2, size
);
262 net_root_path
[size
] = 0;
265 case 18: /* Extension path - Not yet supported */
267 * This can be used to send the information of the
268 * vendor area in another file that the client can
272 /* IP host layer fields */
273 case 40: /* NIS Domain name */
274 if (net_nis_domain
[0] == 0) {
275 size
= truncate_sz("NIS Domain Name",
276 sizeof(net_nis_domain
), size
);
277 memcpy(&net_nis_domain
, ext
+ 2, size
);
278 net_nis_domain
[size
] = 0;
281 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
282 case 42: /* NTP server IP */
283 net_copy_ip(&net_ntp_server
, (struct in_addr
*)(ext
+ 2));
286 /* Application layer fields */
287 case 43: /* Vendor specific info - Not yet supported */
289 * Binary information to exchange specific
290 * product information.
293 /* Reserved (custom) fields (128..254) */
297 static void bootp_process_vendor(u8
*ext
, int size
)
299 u8
*end
= ext
+ size
;
301 debug("[BOOTP] Checking extension (%d bytes)...\n", size
);
303 while ((ext
< end
) && (*ext
!= 0xff)) {
311 bootp_process_vendor_field(opt
);
315 debug("[BOOTP] Received fields:\n");
316 if (net_netmask
.s_addr
)
317 debug("net_netmask : %pI4\n", &net_netmask
);
319 if (net_gateway
.s_addr
)
320 debug("net_gateway : %pI4", &net_gateway
);
322 if (net_boot_file_expected_size_in_blocks
)
323 debug("net_boot_file_expected_size_in_blocks : %d\n",
324 net_boot_file_expected_size_in_blocks
);
327 debug("net_hostname : %s\n", net_hostname
);
329 if (net_root_path
[0])
330 debug("net_root_path : %s\n", net_root_path
);
332 if (net_nis_domain
[0])
333 debug("net_nis_domain : %s\n", net_nis_domain
);
335 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
337 debug("net_ntp_server : %pI4\n", &net_ntp_server
);
342 * Handle a BOOTP received packet.
344 static void bootp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
345 unsigned src
, unsigned len
)
347 struct bootp_hdr
*bp
;
349 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
350 src
, dest
, len
, sizeof(struct bootp_hdr
));
352 bp
= (struct bootp_hdr
*)pkt
;
354 /* Filter out pkts we don't want */
355 if (check_reply_packet(pkt
, dest
, src
, len
))
359 * Got a good BOOTP reply. Copy the data into our variables.
361 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
362 status_led_set(STATUS_LED_BOOT
, STATUS_LED_OFF
);
365 store_net_params(bp
); /* Store net parameters from reply */
367 /* Retrieve extended information (we must parse the vendor area) */
368 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
369 bootp_process_vendor((uchar
*)&bp
->bp_vend
[4], len
);
371 net_set_timeout_handler(0, (thand_f
*)0);
372 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
, "bootp_stop");
374 debug("Got good BOOTP\n");
381 * Timeout on BOOTP/DHCP request.
383 static void bootp_timeout_handler(void)
385 ulong time_taken
= get_timer(bootp_start
);
387 if (time_taken
>= time_taken_max
) {
388 #ifdef CONFIG_BOOTP_MAY_FAIL
389 puts("\nRetry time exceeded\n");
390 net_set_state(NETLOOP_FAIL
);
392 puts("\nRetry time exceeded; starting again\n");
397 if (bootp_timeout
> 2000)
398 bootp_timeout
= 2000;
399 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
404 #define put_vci(e, str) \
406 size_t vci_strlen = strlen(str); \
407 *e++ = 60; /* Vendor Class Identifier */ \
409 memcpy(e, str, vci_strlen); \
414 * Initialize BOOTP extension fields in the request.
416 #if defined(CONFIG_CMD_DHCP)
417 static int dhcp_extended(u8
*e
, int message_type
, struct in_addr server_ip
,
418 struct in_addr requested_ip
)
422 #if defined(CONFIG_BOOTP_PXE)
427 #if defined(CONFIG_BOOTP_VENDOREX)
430 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
434 *e
++ = 99; /* RFC1048 Magic Cookie */
439 *e
++ = 53; /* DHCP Message Type */
443 *e
++ = 57; /* Maximum DHCP Message Size */
445 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 8;
446 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
448 if (server_ip
.s_addr
) {
449 int tmp
= ntohl(server_ip
.s_addr
);
451 *e
++ = 54; /* ServerID */
459 if (requested_ip
.s_addr
) {
460 int tmp
= ntohl(requested_ip
.s_addr
);
462 *e
++ = 50; /* Requested IP */
469 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
470 hostname
= getenv("hostname");
472 int hostnamelen
= strlen(hostname
);
474 *e
++ = 12; /* Hostname */
476 memcpy(e
, hostname
, hostnamelen
);
481 #if defined(CONFIG_BOOTP_PXE)
482 clientarch
= CONFIG_BOOTP_PXE_CLIENTARCH
;
483 *e
++ = 93; /* Client System Architecture */
485 *e
++ = (clientarch
>> 8) & 0xff;
486 *e
++ = clientarch
& 0xff;
488 *e
++ = 94; /* Client Network Interface Identifier */
490 *e
++ = 1; /* type field for UNDI */
491 *e
++ = 0; /* major revision */
492 *e
++ = 0; /* minor revision */
494 uuid
= getenv("pxeuuid");
497 if (uuid_str_valid(uuid
)) {
498 *e
++ = 97; /* Client Machine Identifier */
500 *e
++ = 0; /* type 0 - UUID */
502 uuid_str_to_bin(uuid
, e
, UUID_STR_FORMAT_STD
);
505 printf("Invalid pxeuuid: %s\n", uuid
);
510 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
511 put_vci(e
, CONFIG_SPL_NET_VCI_STRING
);
512 #elif defined(CONFIG_BOOTP_VCI_STRING)
513 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
516 #if defined(CONFIG_BOOTP_VENDOREX)
517 x
= dhcp_vendorex_prep(e
);
522 *e
++ = 55; /* Parameter Request List */
523 cnt
= e
++; /* Pointer to count of requested items */
525 #if defined(CONFIG_BOOTP_SUBNETMASK)
526 *e
++ = 1; /* Subnet Mask */
529 #if defined(CONFIG_BOOTP_TIMEOFFSET)
533 #if defined(CONFIG_BOOTP_GATEWAY)
534 *e
++ = 3; /* Router Option */
537 #if defined(CONFIG_BOOTP_DNS)
538 *e
++ = 6; /* DNS Server(s) */
541 #if defined(CONFIG_BOOTP_HOSTNAME)
542 *e
++ = 12; /* Hostname */
545 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
546 *e
++ = 13; /* Boot File Size */
549 #if defined(CONFIG_BOOTP_BOOTPATH)
550 *e
++ = 17; /* Boot path */
553 #if defined(CONFIG_BOOTP_NISDOMAIN)
554 *e
++ = 40; /* NIS Domain name request */
557 #if defined(CONFIG_BOOTP_NTPSERVER)
561 /* no options, so back up to avoid sending an empty request list */
565 *e
++ = 255; /* End of the list */
567 /* Pad to minimal length */
568 #ifdef CONFIG_DHCP_MIN_EXT_LEN
569 while ((e
- start
) < CONFIG_DHCP_MIN_EXT_LEN
)
578 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
580 static int bootp_extended(u8
*e
)
584 *e
++ = 99; /* RFC1048 Magic Cookie */
589 #if defined(CONFIG_CMD_DHCP)
590 *e
++ = 53; /* DHCP Message Type */
592 *e
++ = DHCP_DISCOVER
;
594 *e
++ = 57; /* Maximum DHCP Message Size */
596 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 16;
597 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
600 #if defined(CONFIG_BOOTP_VCI_STRING) || \
601 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING))
602 #ifdef CONFIG_SPL_BUILD
603 put_vci(e
, CONFIG_SPL_NET_VCI_STRING
);
605 put_vci(e
, CONFIG_BOOTP_VCI_STRING
);
609 #if defined(CONFIG_BOOTP_SUBNETMASK)
610 *e
++ = 1; /* Subnet mask request */
615 #if defined(CONFIG_BOOTP_GATEWAY)
616 *e
++ = 3; /* Default gateway request */
621 #if defined(CONFIG_BOOTP_DNS)
622 *e
++ = 6; /* Domain Name Server */
627 #if defined(CONFIG_BOOTP_HOSTNAME)
628 *e
++ = 12; /* Host name request */
633 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
634 *e
++ = 13; /* Boot file size */
639 #if defined(CONFIG_BOOTP_BOOTPATH)
640 *e
++ = 17; /* Boot path */
645 #if defined(CONFIG_BOOTP_NISDOMAIN)
646 *e
++ = 40; /* NIS Domain name request */
650 #if defined(CONFIG_BOOTP_NTPSERVER)
656 *e
++ = 255; /* End of the list */
662 void bootp_reset(void)
666 bootp_start
= get_timer(0);
670 void bootp_request(void)
673 struct bootp_hdr
*bp
;
674 int extlen
, pktlen
, iplen
;
676 #ifdef CONFIG_BOOTP_RANDOM_DELAY
680 struct in_addr zero_ip
;
681 struct in_addr bcast_ip
;
682 char *ep
; /* Environment pointer */
684 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START
, "bootp_start");
685 #if defined(CONFIG_CMD_DHCP)
689 ep
= getenv("bootpretryperiod");
691 time_taken_max
= simple_strtoul(ep
, NULL
, 10);
693 time_taken_max
= TIMEOUT_MS
;
695 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
699 if (bootp_try
<= 2) /* Start with max 1024 * 1ms */
700 rand_ms
= rand() >> (22 - bootp_try
);
701 else /* After 3rd BOOTP request max 8192 * 1ms */
702 rand_ms
= rand() >> 19;
704 printf("Random delay: %ld ms...\n", rand_ms
);
707 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
709 printf("BOOTP broadcast %d\n", ++bootp_try
);
711 memset((void *)pkt
, 0, PKTSIZE
);
713 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
717 * Next line results in incorrect packet size being transmitted,
718 * resulting in errors in some DHCP servers, reporting missing bytes.
719 * Size must be set in packet header after extension length has been
721 * C. Hallinan, DS4.COM, Inc.
723 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
724 sizeof (struct bootp_hdr)); */
725 iphdr
= pkt
; /* We need this later for net_set_udp_header() */
726 pkt
+= IP_UDP_HDR_SIZE
;
728 bp
= (struct bootp_hdr
*)pkt
;
729 bp
->bp_op
= OP_BOOTREQUEST
;
730 bp
->bp_htype
= HWT_ETHER
;
731 bp
->bp_hlen
= HWL_ETHER
;
734 * according to RFC1542, should be 0 on first request, secs since
735 * first request otherwise
737 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
739 net_write_ip(&bp
->bp_ciaddr
, zero_ip
);
740 net_write_ip(&bp
->bp_yiaddr
, zero_ip
);
741 net_write_ip(&bp
->bp_siaddr
, zero_ip
);
742 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
743 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
744 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
746 /* Request additional information from the BOOTP/DHCP server */
747 #if defined(CONFIG_CMD_DHCP)
748 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, zero_ip
,
751 extlen
= bootp_extended((u8
*)bp
->bp_vend
);
755 * Bootp ID is the lower 4 bytes of our ethernet address
756 * plus the current time in ms.
758 bootp_id
= ((u32
)net_ethaddr
[2] << 24)
759 | ((u32
)net_ethaddr
[3] << 16)
760 | ((u32
)net_ethaddr
[4] << 8)
761 | (u32
)net_ethaddr
[5];
762 bootp_id
+= get_timer(0);
763 bootp_id
= htonl(bootp_id
);
764 bootp_add_id(bootp_id
);
765 net_copy_u32(&bp
->bp_id
, &bootp_id
);
768 * Calculate proper packet lengths taking into account the
769 * variable size of the options field
771 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
772 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
773 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
774 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
775 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
777 #if defined(CONFIG_CMD_DHCP)
778 dhcp_state
= SELECTING
;
779 net_set_udp_handler(dhcp_handler
);
781 net_set_udp_handler(bootp_handler
);
783 net_send_packet(net_tx_packet
, pktlen
);
786 #if defined(CONFIG_CMD_DHCP)
787 static void dhcp_process_options(uchar
*popt
, uchar
*end
)
790 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
794 while (popt
< end
&& *popt
!= 0xff) {
798 oplen
= -1; /* Pad omits len byte */
801 net_copy_ip(&net_netmask
, (popt
+ 2));
803 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
804 case 2: /* Time offset */
805 to_ptr
= &net_ntp_time_offset
;
806 net_copy_u32((u32
*)to_ptr
, (u32
*)(popt
+ 2));
807 net_ntp_time_offset
= ntohl(net_ntp_time_offset
);
811 net_copy_ip(&net_gateway
, (popt
+ 2));
814 net_copy_ip(&net_dns_server
, (popt
+ 2));
815 #if defined(CONFIG_BOOTP_DNS2)
817 net_copy_ip(&net_dns_server2
, (popt
+ 2 + 4));
821 size
= truncate_sz("Host Name",
822 sizeof(net_hostname
), oplen
);
823 memcpy(&net_hostname
, popt
+ 2, size
);
824 net_hostname
[size
] = 0;
826 case 15: /* Ignore Domain Name Option */
829 size
= truncate_sz("Root Path",
830 sizeof(net_root_path
), oplen
);
831 memcpy(&net_root_path
, popt
+ 2, size
);
832 net_root_path
[size
] = 0;
834 case 28: /* Ignore Broadcast Address Option */
836 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
837 case 42: /* NTP server IP */
838 net_copy_ip(&net_ntp_server
, (popt
+ 2));
842 net_copy_u32(&dhcp_leasetime
, (u32
*)(popt
+ 2));
845 dhcp_option_overload
= popt
[2];
847 case 53: /* Ignore Message Type Option */
850 net_copy_ip(&dhcp_server_ip
, (popt
+ 2));
852 case 58: /* Ignore Renewal Time Option */
854 case 59: /* Ignore Rebinding Time Option */
856 case 66: /* Ignore TFTP server name */
858 case 67: /* Bootfile option */
859 size
= truncate_sz("Bootfile",
860 sizeof(net_boot_file_name
), oplen
);
861 memcpy(&net_boot_file_name
, popt
+ 2, size
);
862 net_boot_file_name
[size
] = 0;
865 #if defined(CONFIG_BOOTP_VENDOREX)
866 if (dhcp_vendorex_proc(popt
))
869 printf("*** Unhandled DHCP Option in OFFER/ACK:"
873 popt
+= oplen
+ 2; /* Process next option */
877 static void dhcp_packet_process_options(struct bootp_hdr
*bp
)
879 uchar
*popt
= (uchar
*)&bp
->bp_vend
[4];
880 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
882 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) != htonl(BOOTP_VENDOR_MAGIC
))
885 dhcp_option_overload
= 0;
888 * The 'options' field MUST be interpreted first, 'file' next,
891 dhcp_process_options(popt
, end
);
893 if (dhcp_option_overload
& OVERLOAD_FILE
) {
894 popt
= (uchar
*)bp
->bp_file
;
895 end
= popt
+ sizeof(bp
->bp_file
);
896 dhcp_process_options(popt
, end
);
899 if (dhcp_option_overload
& OVERLOAD_SNAME
) {
900 popt
= (uchar
*)bp
->bp_sname
;
901 end
= popt
+ sizeof(bp
->bp_sname
);
902 dhcp_process_options(popt
, end
);
906 static int dhcp_message_type(unsigned char *popt
)
908 if (net_read_u32((u32
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
912 while (*popt
!= 0xff) {
913 if (*popt
== 53) /* DHCP Message Type */
919 /* Scan through all options */
920 popt
+= *(popt
+ 1) + 2;
926 static void dhcp_send_request_packet(struct bootp_hdr
*bp_offer
)
929 struct bootp_hdr
*bp
;
930 int pktlen
, iplen
, extlen
;
932 struct in_addr offered_ip
;
933 struct in_addr zero_ip
;
934 struct in_addr bcast_ip
;
936 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
938 memset((void *)pkt
, 0, PKTSIZE
);
940 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
943 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
944 pkt
+= IP_UDP_HDR_SIZE
;
946 bp
= (struct bootp_hdr
*)pkt
;
947 bp
->bp_op
= OP_BOOTREQUEST
;
948 bp
->bp_htype
= HWT_ETHER
;
949 bp
->bp_hlen
= HWL_ETHER
;
951 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
952 /* Do not set the client IP, your IP, or server IP yet, since it
953 * hasn't been ACK'ed by the server yet */
956 * RFC3046 requires Relay Agents to discard packets with
957 * nonzero and offered giaddr
960 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
962 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
963 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
966 * ID is the id of the OFFER packet
969 net_copy_u32(&bp
->bp_id
, &bp_offer
->bp_id
);
972 * Copy options from OFFER packet if present
975 /* Copy offered IP into the parameters request list */
976 net_copy_ip(&offered_ip
, &bp_offer
->bp_yiaddr
);
977 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_REQUEST
,
978 dhcp_server_ip
, offered_ip
);
980 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
981 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
982 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
983 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
985 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
986 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY
);
987 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
988 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
989 net_send_packet(net_tx_packet
, pktlen
);
993 * Handle DHCP received packets.
995 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
996 unsigned src
, unsigned len
)
998 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
1000 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1001 src
, dest
, len
, dhcp_state
);
1003 /* Filter out pkts we don't want */
1004 if (check_reply_packet(pkt
, dest
, src
, len
))
1007 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1008 "%d\n", src
, dest
, len
, dhcp_state
);
1010 if (net_read_ip(&bp
->bp_yiaddr
).s_addr
== 0)
1013 switch (dhcp_state
) {
1016 * Wait an appropriate time for any potential DHCPOFFER packets
1017 * to arrive. Then select one, and generate DHCPREQUEST
1018 * response. If filename is in format we recognize, assume it
1019 * is a valid OFFER from a server we want.
1021 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
1022 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1023 if (strncmp(bp
->bp_file
,
1024 CONFIG_SYS_BOOTFILE_PREFIX
,
1025 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0) {
1026 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1027 dhcp_packet_process_options(bp
);
1029 debug("TRANSITIONING TO REQUESTING STATE\n");
1030 dhcp_state
= REQUESTING
;
1032 net_set_timeout_handler(5000, bootp_timeout_handler
);
1033 dhcp_send_request_packet(bp
);
1034 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1036 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1041 debug("DHCP State: REQUESTING\n");
1043 if (dhcp_message_type((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
1044 dhcp_packet_process_options(bp
);
1045 /* Store net params from reply */
1046 store_net_params(bp
);
1048 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1049 &net_ip
, get_timer(bootp_start
));
1050 net_set_timeout_handler(0, (thand_f
*)0);
1051 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
,
1059 /* DHCP client bound to address */
1062 puts("DHCP: INVALID STATE\n");
1067 void dhcp_request(void)
1071 #endif /* CONFIG_CMD_DHCP */