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 #include <bootstage.h>
15 #include <efi_loader.h>
20 #include <linux/delay.h>
23 #ifdef CONFIG_LED_STATUS
24 #include <status_led.h>
26 #ifdef CONFIG_BOOTP_RANDOM_DELAY
30 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
33 * The timeout for the initial BOOTP/DHCP request used to be described by a
34 * counter of fixed-length timeout periods. CONFIG_NET_RETRY_COUNT represents
37 * Now that the timeout periods are variable (exponential backoff and retry)
38 * we convert the timeout count to the absolute time it would have take to
39 * execute that many retries, and keep sending retry packets until that time
42 #define TIMEOUT_MS ((3 + (CONFIG_NET_RETRY_COUNT * 5)) * 1000)
44 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
45 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
47 #ifndef CFG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
48 #define CFG_DHCP_MIN_EXT_LEN 64
51 #ifndef CFG_BOOTP_ID_CACHE_SIZE
52 #define CFG_BOOTP_ID_CACHE_SIZE 4
55 u32 bootp_ids
[CFG_BOOTP_ID_CACHE_SIZE
];
56 unsigned int bootp_num_ids
;
60 char net_nis_domain
[32] = {0,}; /* Our NIS domain */
61 char net_hostname
[32] = {0,}; /* Our hostname */
62 char net_root_path
[CONFIG_BOOTP_MAX_ROOT_PATH_LEN
] = {0,}; /* Our bootpath */
64 static ulong time_taken_max
;
66 #if defined(CONFIG_CMD_DHCP)
67 static dhcp_state_t dhcp_state
= INIT
;
68 static u32 dhcp_leasetime
;
69 static struct in_addr dhcp_server_ip
;
70 static u8 dhcp_option_overload
;
71 #define OVERLOAD_FILE 1
72 #define OVERLOAD_SNAME 2
73 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
74 unsigned src
, unsigned len
);
78 static char *dhcpmsg2str(int type
)
81 case 1: return "DHCPDISCOVER"; break;
82 case 2: return "DHCPOFFER"; break;
83 case 3: return "DHCPREQUEST"; break;
84 case 4: return "DHCPDECLINE"; break;
85 case 5: return "DHCPACK"; break;
86 case 6: return "DHCPNACK"; break;
87 case 7: return "DHCPRELEASE"; break;
88 default: return "UNKNOWN/INVALID MSG TYPE"; break;
94 static void bootp_add_id(ulong id
)
96 if (bootp_num_ids
>= ARRAY_SIZE(bootp_ids
)) {
97 size_t size
= sizeof(bootp_ids
) - sizeof(id
);
99 memmove(bootp_ids
, &bootp_ids
[1], size
);
100 bootp_ids
[bootp_num_ids
- 1] = id
;
102 bootp_ids
[bootp_num_ids
] = id
;
107 static bool bootp_match_id(ulong id
)
111 for (i
= 0; i
< bootp_num_ids
; i
++)
112 if (bootp_ids
[i
] == id
)
118 static int check_reply_packet(uchar
*pkt
, unsigned dest
, unsigned src
,
121 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
124 if (dest
!= PORT_BOOTPC
|| src
!= PORT_BOOTPS
)
126 else if (len
< sizeof(struct bootp_hdr
) - OPT_FIELD_SIZE
)
128 else if (bp
->bp_op
!= OP_BOOTREPLY
)
130 else if (bp
->bp_htype
!= HWT_ETHER
)
132 else if (bp
->bp_hlen
!= HWL_ETHER
)
134 else if (!bootp_match_id(net_read_u32(&bp
->bp_id
)))
136 else if (memcmp(bp
->bp_chaddr
, net_ethaddr
, HWL_ETHER
) != 0)
139 debug("Filtering pkt = %d\n", retval
);
144 static void store_bootp_params(struct bootp_hdr
*bp
)
146 struct in_addr tmp_ip
;
147 bool overwrite_serverip
= true;
149 if (IS_ENABLED(CONFIG_BOOTP_SERVERIP
))
152 #if defined(CONFIG_BOOTP_PREFER_SERVERIP)
153 overwrite_serverip
= false;
156 net_copy_ip(&tmp_ip
, &bp
->bp_siaddr
);
157 if (tmp_ip
.s_addr
!= 0 && (overwrite_serverip
|| !net_server_ip
.s_addr
))
158 net_copy_ip(&net_server_ip
, &bp
->bp_siaddr
);
159 memcpy(net_server_ethaddr
,
160 ((struct ethernet_hdr
*)net_rx_packet
)->et_src
, 6);
162 #if defined(CONFIG_CMD_DHCP)
163 !(dhcp_option_overload
& OVERLOAD_FILE
) &&
165 (strlen(bp
->bp_file
) > 0) &&
166 !net_boot_file_name_explicit
) {
167 copy_filename(net_boot_file_name
, bp
->bp_file
,
168 sizeof(net_boot_file_name
));
171 debug("net_boot_file_name: %s\n", net_boot_file_name
);
173 /* Propagate to environment:
174 * don't delete exising entry when BOOTP / DHCP reply does
175 * not contain a new value
177 if (*net_boot_file_name
)
178 env_set("bootfile", net_boot_file_name
);
182 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
184 static void store_net_params(struct bootp_hdr
*bp
)
186 #if !defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
187 store_bootp_params(bp
);
189 net_copy_ip(&net_ip
, &bp
->bp_yiaddr
);
192 static int truncate_sz(const char *name
, int maxlen
, int curlen
)
194 if (curlen
>= maxlen
) {
195 printf("*** WARNING: %s is too long (%d - max: %d)"
196 " - truncated\n", name
, curlen
, maxlen
);
202 #if !defined(CONFIG_CMD_DHCP)
204 static void bootp_process_vendor_field(u8
*ext
)
206 int size
= *(ext
+ 1);
208 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext
,
211 net_boot_file_expected_size_in_blocks
= 0;
214 /* Fixed length fields */
215 case 1: /* Subnet mask */
216 if (net_netmask
.s_addr
== 0)
217 net_copy_ip(&net_netmask
, (struct in_addr
*)(ext
+ 2));
219 case 2: /* Time offset - Not yet supported */
221 /* Variable length fields */
222 case 3: /* Gateways list */
223 if (net_gateway
.s_addr
== 0)
224 net_copy_ip(&net_gateway
, (struct in_addr
*)(ext
+ 2));
226 case 4: /* Time server - Not yet supported */
228 case 5: /* IEN-116 name server - Not yet supported */
231 if (net_dns_server
.s_addr
== 0)
232 net_copy_ip(&net_dns_server
,
233 (struct in_addr
*)(ext
+ 2));
234 #if defined(CONFIG_BOOTP_DNS2)
235 if ((net_dns_server2
.s_addr
== 0) && (size
> 4))
236 net_copy_ip(&net_dns_server2
,
237 (struct in_addr
*)(ext
+ 2 + 4));
240 case 7: /* Log server - Not yet supported */
242 case 8: /* Cookie/Quote server - Not yet supported */
244 case 9: /* LPR server - Not yet supported */
246 case 10: /* Impress server - Not yet supported */
248 case 11: /* RPL server - Not yet supported */
250 case 12: /* Host name */
251 if (net_hostname
[0] == 0) {
252 size
= truncate_sz("Host Name",
253 sizeof(net_hostname
), size
);
254 memcpy(&net_hostname
, ext
+ 2, size
);
255 net_hostname
[size
] = 0;
258 case 13: /* Boot file size */
260 net_boot_file_expected_size_in_blocks
=
261 ntohs(*(ushort
*)(ext
+ 2));
263 net_boot_file_expected_size_in_blocks
=
264 ntohl(*(ulong
*)(ext
+ 2));
266 case 14: /* Merit dump file - Not yet supported */
268 case 15: /* Domain name - Not yet supported */
270 case 16: /* Swap server - Not yet supported */
272 case 17: /* Root path */
273 if (net_root_path
[0] == 0) {
274 size
= truncate_sz("Root Path",
275 sizeof(net_root_path
), size
);
276 memcpy(&net_root_path
, ext
+ 2, size
);
277 net_root_path
[size
] = 0;
280 case 18: /* Extension path - Not yet supported */
282 * This can be used to send the information of the
283 * vendor area in another file that the client can
287 /* IP host layer fields */
288 case 40: /* NIS Domain name */
289 if (net_nis_domain
[0] == 0) {
290 size
= truncate_sz("NIS Domain Name",
291 sizeof(net_nis_domain
), size
);
292 memcpy(&net_nis_domain
, ext
+ 2, size
);
293 net_nis_domain
[size
] = 0;
296 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
297 case 42: /* NTP server IP */
298 net_copy_ip(&net_ntp_server
, (struct in_addr
*)(ext
+ 2));
301 /* Application layer fields */
302 case 43: /* Vendor specific info - Not yet supported */
304 * Binary information to exchange specific
305 * product information.
308 /* Reserved (custom) fields (128..254) */
312 static void bootp_process_vendor(u8
*ext
, int size
)
314 u8
*end
= ext
+ size
;
316 debug("[BOOTP] Checking extension (%d bytes)...\n", size
);
318 while ((ext
< end
) && (*ext
!= 0xff)) {
326 bootp_process_vendor_field(opt
);
330 debug("[BOOTP] Received fields:\n");
331 if (net_netmask
.s_addr
)
332 debug("net_netmask : %pI4\n", &net_netmask
);
334 if (net_gateway
.s_addr
)
335 debug("net_gateway : %pI4", &net_gateway
);
337 if (net_boot_file_expected_size_in_blocks
)
338 debug("net_boot_file_expected_size_in_blocks : %d\n",
339 net_boot_file_expected_size_in_blocks
);
342 debug("net_hostname : %s\n", net_hostname
);
344 if (net_root_path
[0])
345 debug("net_root_path : %s\n", net_root_path
);
347 if (net_nis_domain
[0])
348 debug("net_nis_domain : %s\n", net_nis_domain
);
350 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
351 if (net_ntp_server
.s_addr
)
352 debug("net_ntp_server : %pI4\n", &net_ntp_server
);
357 * Handle a BOOTP received packet.
359 static void bootp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
360 unsigned src
, unsigned len
)
362 struct bootp_hdr
*bp
;
364 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
365 src
, dest
, len
, sizeof(struct bootp_hdr
));
367 bp
= (struct bootp_hdr
*)pkt
;
369 /* Filter out pkts we don't want */
370 if (check_reply_packet(pkt
, dest
, src
, len
))
374 * Got a good BOOTP reply. Copy the data into our variables.
376 #if defined(CONFIG_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE)
377 status_led_set(CONFIG_LED_STATUS_BOOT
, CONFIG_LED_STATUS_OFF
);
380 store_net_params(bp
); /* Store net parameters from reply */
382 /* Retrieve extended information (we must parse the vendor area) */
383 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) == htonl(BOOTP_VENDOR_MAGIC
))
384 bootp_process_vendor((uchar
*)&bp
->bp_vend
[4], len
);
386 net_set_timeout_handler(0, (thand_f
*)0);
387 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
, "bootp_stop");
389 debug("Got good BOOTP\n");
396 * Timeout on BOOTP/DHCP request.
398 static void bootp_timeout_handler(void)
400 ulong time_taken
= get_timer(bootp_start
);
402 if (time_taken
>= time_taken_max
) {
403 #ifdef CONFIG_BOOTP_MAY_FAIL
406 ethrotate
= env_get("ethrotate");
407 if ((ethrotate
&& strcmp(ethrotate
, "no") == 0) ||
409 puts("\nRetry time exceeded\n");
410 net_set_state(NETLOOP_FAIL
);
414 puts("\nRetry time exceeded; starting again\n");
419 if (bootp_timeout
> 2000)
420 bootp_timeout
= 2000;
421 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
426 #define put_vci(e, str) \
428 size_t vci_strlen = strlen(str); \
429 *e++ = 60; /* Vendor Class Identifier */ \
431 memcpy(e, str, vci_strlen); \
435 static u8
*add_vci(u8
*e
)
438 char *env_vci
= env_get("bootp_vci");
440 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
441 vci
= CONFIG_SPL_NET_VCI_STRING
;
442 #elif defined(CONFIG_BOOTP_VCI_STRING)
443 vci
= CONFIG_BOOTP_VCI_STRING
;
456 * Initialize BOOTP extension fields in the request.
458 #if defined(CONFIG_CMD_DHCP)
459 static int dhcp_extended(u8
*e
, int message_type
, struct in_addr server_ip
,
460 struct in_addr requested_ip
)
464 #ifdef CONFIG_LIB_UUID
469 #if defined(CONFIG_BOOTP_VENDOREX)
472 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
476 *e
++ = 99; /* RFC1048 Magic Cookie */
481 *e
++ = 53; /* DHCP Message Type */
485 *e
++ = 57; /* Maximum DHCP Message Size */
487 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 8;
488 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
490 if (server_ip
.s_addr
) {
491 int tmp
= ntohl(server_ip
.s_addr
);
493 *e
++ = 54; /* ServerID */
501 if (requested_ip
.s_addr
) {
502 int tmp
= ntohl(requested_ip
.s_addr
);
504 *e
++ = 50; /* Requested IP */
511 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
512 hostname
= env_get("hostname");
514 int hostnamelen
= strlen(hostname
);
516 *e
++ = 12; /* Hostname */
518 memcpy(e
, hostname
, hostnamelen
);
523 #ifdef CONFIG_BOOTP_PXE_CLIENTARCH
524 clientarch
= CONFIG_BOOTP_PXE_CLIENTARCH
;
527 if (env_get("bootp_arch"))
528 clientarch
= env_get_ulong("bootp_arch", 16, clientarch
);
530 if (clientarch
> 0) {
531 *e
++ = 93; /* Client System Architecture */
533 *e
++ = (clientarch
>> 8) & 0xff;
534 *e
++ = clientarch
& 0xff;
537 *e
++ = 94; /* Client Network Interface Identifier */
539 *e
++ = 1; /* type field for UNDI */
540 *e
++ = 0; /* major revision */
541 *e
++ = 0; /* minor revision */
543 #ifdef CONFIG_LIB_UUID
544 uuid
= env_get("pxeuuid");
547 if (uuid_str_valid(uuid
)) {
548 *e
++ = 97; /* Client Machine Identifier */
550 *e
++ = 0; /* type 0 - UUID */
552 uuid_str_to_bin(uuid
, e
, UUID_STR_FORMAT_STD
);
555 printf("Invalid pxeuuid: %s\n", uuid
);
562 #if defined(CONFIG_BOOTP_VENDOREX)
563 x
= dhcp_vendorex_prep(e
);
568 *e
++ = 55; /* Parameter Request List */
569 cnt
= e
++; /* Pointer to count of requested items */
571 #if defined(CONFIG_BOOTP_SUBNETMASK)
572 *e
++ = 1; /* Subnet Mask */
575 #if defined(CONFIG_BOOTP_TIMEOFFSET)
579 #if defined(CONFIG_BOOTP_GATEWAY)
580 *e
++ = 3; /* Router Option */
583 #if defined(CONFIG_BOOTP_DNS)
584 *e
++ = 6; /* DNS Server(s) */
587 #if defined(CONFIG_BOOTP_HOSTNAME)
588 *e
++ = 12; /* Hostname */
591 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
592 *e
++ = 13; /* Boot File Size */
595 #if defined(CONFIG_BOOTP_BOOTPATH)
596 *e
++ = 17; /* Boot path */
599 #if defined(CONFIG_BOOTP_NISDOMAIN)
600 *e
++ = 40; /* NIS Domain name request */
603 #if defined(CONFIG_BOOTP_NTPSERVER)
607 /* no options, so back up to avoid sending an empty request list */
611 *e
++ = 255; /* End of the list */
613 /* Pad to minimal length */
614 #ifdef CFG_DHCP_MIN_EXT_LEN
615 while ((e
- start
) < CFG_DHCP_MIN_EXT_LEN
)
624 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
626 static int bootp_extended(u8
*e
)
630 *e
++ = 99; /* RFC1048 Magic Cookie */
635 #if defined(CONFIG_CMD_DHCP)
636 *e
++ = 53; /* DHCP Message Type */
638 *e
++ = DHCP_DISCOVER
;
640 *e
++ = 57; /* Maximum DHCP Message Size */
642 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) >> 16;
643 *e
++ = (576 - 312 + OPT_FIELD_SIZE
) & 0xff;
648 #if defined(CONFIG_BOOTP_SUBNETMASK)
649 *e
++ = 1; /* Subnet mask request */
654 #if defined(CONFIG_BOOTP_GATEWAY)
655 *e
++ = 3; /* Default gateway request */
660 #if defined(CONFIG_BOOTP_DNS)
661 *e
++ = 6; /* Domain Name Server */
666 #if defined(CONFIG_BOOTP_HOSTNAME)
667 *e
++ = 12; /* Host name request */
672 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
673 *e
++ = 13; /* Boot file size */
678 #if defined(CONFIG_BOOTP_BOOTPATH)
679 *e
++ = 17; /* Boot path */
684 #if defined(CONFIG_BOOTP_NISDOMAIN)
685 *e
++ = 40; /* NIS Domain name request */
689 #if defined(CONFIG_BOOTP_NTPSERVER)
695 *e
++ = 255; /* End of the list */
698 * If nothing in list, remove it altogether. Some DHCP servers get
699 * upset by this minor faux pas and do not respond at all.
701 if (e
== start
+ 3) {
702 printf("*** Warning: no DHCP options requested\n");
710 void bootp_reset(void)
714 bootp_start
= get_timer(0);
718 void bootp_request(void)
721 struct bootp_hdr
*bp
;
722 int extlen
, pktlen
, iplen
;
724 #ifdef CONFIG_BOOTP_RANDOM_DELAY
728 struct in_addr zero_ip
;
729 struct in_addr bcast_ip
;
730 char *ep
; /* Environment pointer */
732 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START
, "bootp_start");
733 #if defined(CONFIG_CMD_DHCP)
737 ep
= env_get("bootpretryperiod");
739 time_taken_max
= dectoul(ep
, NULL
);
741 time_taken_max
= TIMEOUT_MS
;
743 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
747 if (bootp_try
<= 2) /* Start with max 1024 * 1ms */
748 rand_ms
= rand() >> (22 - bootp_try
);
749 else /* After 3rd BOOTP request max 8192 * 1ms */
750 rand_ms
= rand() >> 19;
752 printf("Random delay: %ld ms...\n", rand_ms
);
755 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
757 printf("BOOTP broadcast %d\n", ++bootp_try
);
759 memset((void *)pkt
, 0, PKTSIZE
);
761 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
765 * Next line results in incorrect packet size being transmitted,
766 * resulting in errors in some DHCP servers, reporting missing bytes.
767 * Size must be set in packet header after extension length has been
769 * C. Hallinan, DS4.COM, Inc.
771 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
772 sizeof (struct bootp_hdr)); */
773 iphdr
= pkt
; /* We need this later for net_set_udp_header() */
774 pkt
+= IP_UDP_HDR_SIZE
;
776 bp
= (struct bootp_hdr
*)pkt
;
777 bp
->bp_op
= OP_BOOTREQUEST
;
778 bp
->bp_htype
= HWT_ETHER
;
779 bp
->bp_hlen
= HWL_ETHER
;
782 * according to RFC1542, should be 0 on first request, secs since
783 * first request otherwise
785 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
787 net_write_ip(&bp
->bp_ciaddr
, zero_ip
);
788 net_write_ip(&bp
->bp_yiaddr
, zero_ip
);
789 net_write_ip(&bp
->bp_siaddr
, zero_ip
);
790 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
791 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
792 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
794 /* Request additional information from the BOOTP/DHCP server */
795 #if defined(CONFIG_CMD_DHCP)
796 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_DISCOVER
, zero_ip
,
799 extlen
= bootp_extended((u8
*)bp
->bp_vend
);
803 * Bootp ID is the lower 4 bytes of our ethernet address
804 * plus the current time in ms.
806 bootp_id
= ((u32
)net_ethaddr
[2] << 24)
807 | ((u32
)net_ethaddr
[3] << 16)
808 | ((u32
)net_ethaddr
[4] << 8)
809 | (u32
)net_ethaddr
[5];
810 bootp_id
+= get_timer(0);
811 bootp_id
= htonl(bootp_id
);
812 bootp_add_id(bootp_id
);
813 net_copy_u32(&bp
->bp_id
, &bootp_id
);
816 * Calculate proper packet lengths taking into account the
817 * variable size of the options field
819 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
820 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
821 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
822 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
823 net_set_timeout_handler(bootp_timeout
, bootp_timeout_handler
);
825 #if defined(CONFIG_CMD_DHCP)
826 dhcp_state
= SELECTING
;
827 net_set_udp_handler(dhcp_handler
);
829 net_set_udp_handler(bootp_handler
);
831 net_send_packet(net_tx_packet
, pktlen
);
834 #if defined(CONFIG_CMD_DHCP)
835 static void dhcp_process_options(uchar
*popt
, uchar
*end
)
838 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
842 while (popt
< end
&& *popt
!= 0xff) {
846 oplen
= -1; /* Pad omits len byte */
849 net_copy_ip(&net_netmask
, (popt
+ 2));
851 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
852 case 2: /* Time offset */
853 to_ptr
= &net_ntp_time_offset
;
854 net_copy_u32((u32
*)to_ptr
, (u32
*)(popt
+ 2));
855 net_ntp_time_offset
= ntohl(net_ntp_time_offset
);
859 net_copy_ip(&net_gateway
, (popt
+ 2));
862 net_copy_ip(&net_dns_server
, (popt
+ 2));
863 #if defined(CONFIG_BOOTP_DNS2)
865 net_copy_ip(&net_dns_server2
, (popt
+ 2 + 4));
869 size
= truncate_sz("Host Name",
870 sizeof(net_hostname
), oplen
);
871 memcpy(&net_hostname
, popt
+ 2, size
);
872 net_hostname
[size
] = 0;
874 case 15: /* Ignore Domain Name Option */
877 size
= truncate_sz("Root Path",
878 sizeof(net_root_path
), oplen
);
879 memcpy(&net_root_path
, popt
+ 2, size
);
880 net_root_path
[size
] = 0;
882 case 28: /* Ignore Broadcast Address Option */
884 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
885 case 42: /* NTP server IP */
886 net_copy_ip(&net_ntp_server
, (popt
+ 2));
890 net_copy_u32(&dhcp_leasetime
, (u32
*)(popt
+ 2));
893 dhcp_option_overload
= popt
[2];
895 case 53: /* Ignore Message Type Option */
898 net_copy_ip(&dhcp_server_ip
, (popt
+ 2));
900 case 58: /* Ignore Renewal Time Option */
902 case 59: /* Ignore Rebinding Time Option */
904 case 66: /* Ignore TFTP server name */
906 case 67: /* Bootfile option */
907 if (!net_boot_file_name_explicit
) {
908 size
= truncate_sz("Bootfile",
909 sizeof(net_boot_file_name
),
911 memcpy(&net_boot_file_name
, popt
+ 2, size
);
912 net_boot_file_name
[size
] = 0;
916 #if defined(CONFIG_BOOTP_VENDOREX)
917 if (dhcp_vendorex_proc(popt
))
920 printf("*** Unhandled DHCP Option in OFFER/ACK:"
924 popt
+= oplen
+ 2; /* Process next option */
928 static void dhcp_packet_process_options(struct bootp_hdr
*bp
)
930 uchar
*popt
= (uchar
*)&bp
->bp_vend
[4];
931 uchar
*end
= popt
+ BOOTP_HDR_SIZE
;
933 if (net_read_u32((u32
*)&bp
->bp_vend
[0]) != htonl(BOOTP_VENDOR_MAGIC
))
936 dhcp_option_overload
= 0;
939 * The 'options' field MUST be interpreted first, 'file' next,
942 dhcp_process_options(popt
, end
);
944 if (dhcp_option_overload
& OVERLOAD_FILE
) {
945 popt
= (uchar
*)bp
->bp_file
;
946 end
= popt
+ sizeof(bp
->bp_file
);
947 dhcp_process_options(popt
, end
);
950 if (dhcp_option_overload
& OVERLOAD_SNAME
) {
951 popt
= (uchar
*)bp
->bp_sname
;
952 end
= popt
+ sizeof(bp
->bp_sname
);
953 dhcp_process_options(popt
, end
);
957 static int dhcp_message_type(unsigned char *popt
)
959 if (net_read_u32((u32
*)popt
) != htonl(BOOTP_VENDOR_MAGIC
))
963 while (*popt
!= 0xff) {
964 if (*popt
== 53) /* DHCP Message Type */
970 /* Scan through all options */
971 popt
+= *(popt
+ 1) + 2;
977 static void dhcp_send_request_packet(struct bootp_hdr
*bp_offer
)
980 struct bootp_hdr
*bp
;
981 int pktlen
, iplen
, extlen
;
983 struct in_addr offered_ip
;
984 struct in_addr zero_ip
;
985 struct in_addr bcast_ip
;
987 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
989 memset((void *)pkt
, 0, PKTSIZE
);
991 eth_hdr_size
= net_set_ether(pkt
, net_bcast_ethaddr
, PROT_IP
);
994 iphdr
= pkt
; /* We'll need this later to set proper pkt size */
995 pkt
+= IP_UDP_HDR_SIZE
;
997 bp
= (struct bootp_hdr
*)pkt
;
998 bp
->bp_op
= OP_BOOTREQUEST
;
999 bp
->bp_htype
= HWT_ETHER
;
1000 bp
->bp_hlen
= HWL_ETHER
;
1002 bp
->bp_secs
= htons(get_timer(bootp_start
) / 1000);
1003 /* Do not set the client IP, your IP, or server IP yet, since it
1004 * hasn't been ACK'ed by the server yet */
1007 * RFC3046 requires Relay Agents to discard packets with
1008 * nonzero and offered giaddr
1011 net_write_ip(&bp
->bp_giaddr
, zero_ip
);
1013 memcpy(bp
->bp_chaddr
, net_ethaddr
, 6);
1014 copy_filename(bp
->bp_file
, net_boot_file_name
, sizeof(bp
->bp_file
));
1017 * ID is the id of the OFFER packet
1020 net_copy_u32(&bp
->bp_id
, &bp_offer
->bp_id
);
1023 * Copy options from OFFER packet if present
1026 /* Copy offered IP into the parameters request list */
1027 net_copy_ip(&offered_ip
, &bp_offer
->bp_yiaddr
);
1028 extlen
= dhcp_extended((u8
*)bp
->bp_vend
, DHCP_REQUEST
,
1029 dhcp_server_ip
, offered_ip
);
1031 iplen
= BOOTP_HDR_SIZE
- OPT_FIELD_SIZE
+ extlen
;
1032 pktlen
= eth_hdr_size
+ IP_UDP_HDR_SIZE
+ iplen
;
1033 bcast_ip
.s_addr
= 0xFFFFFFFFL
;
1034 net_set_udp_header(iphdr
, bcast_ip
, PORT_BOOTPS
, PORT_BOOTPC
, iplen
);
1036 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen
);
1037 net_send_packet(net_tx_packet
, pktlen
);
1041 * Handle DHCP received packets.
1043 static void dhcp_handler(uchar
*pkt
, unsigned dest
, struct in_addr sip
,
1044 unsigned src
, unsigned len
)
1046 struct bootp_hdr
*bp
= (struct bootp_hdr
*)pkt
;
1048 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1049 src
, dest
, len
, dhcp_state
);
1051 /* Filter out pkts we don't want */
1052 if (check_reply_packet(pkt
, dest
, src
, len
))
1055 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1056 "%d\n", src
, dest
, len
, dhcp_state
);
1058 if (net_read_ip(&bp
->bp_yiaddr
).s_addr
== 0) {
1059 #if defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
1060 store_bootp_params(bp
);
1065 switch (dhcp_state
) {
1068 * Wait an appropriate time for any potential DHCPOFFER packets
1069 * to arrive. Then select one, and generate DHCPREQUEST
1070 * response. If filename is in format we recognize, assume it
1071 * is a valid OFFER from a server we want.
1073 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp
->bp_file
);
1074 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1075 if (strncmp(bp
->bp_file
,
1076 CONFIG_SYS_BOOTFILE_PREFIX
,
1077 strlen(CONFIG_SYS_BOOTFILE_PREFIX
)) == 0) {
1078 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1079 dhcp_packet_process_options(bp
);
1080 if (CONFIG_IS_ENABLED(EFI_LOADER
) &&
1081 IS_ENABLED(CONFIG_NETDEVICES
))
1082 efi_net_set_dhcp_ack(pkt
, len
);
1084 #if defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
1085 if (!net_server_ip
.s_addr
)
1086 udelay(CONFIG_SERVERIP_FROM_PROXYDHCP_DELAY_MS
*
1088 #endif /* CONFIG_SERVERIP_FROM_PROXYDHCP */
1090 debug("TRANSITIONING TO REQUESTING STATE\n");
1091 dhcp_state
= REQUESTING
;
1093 net_set_timeout_handler(5000, bootp_timeout_handler
);
1094 dhcp_send_request_packet(bp
);
1095 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1097 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1102 debug("DHCP State: REQUESTING\n");
1104 if (dhcp_message_type((u8
*)bp
->bp_vend
) == DHCP_ACK
) {
1105 dhcp_packet_process_options(bp
);
1106 /* Store net params from reply */
1107 store_net_params(bp
);
1109 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1110 &net_ip
, get_timer(bootp_start
));
1111 net_set_timeout_handler(0, (thand_f
*)0);
1112 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP
,
1120 /* DHCP client bound to address */
1123 puts("DHCP: INVALID STATE\n");
1128 void dhcp_request(void)
1132 #endif /* CONFIG_CMD_DHCP */