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
13 #include <efi_loader.h>
18 #ifdef CONFIG_STATUS_LED
19 #include <status_led.h>
21 #ifdef CONFIG_BOOTP_RANDOM_DELAY
25 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
28 * The timeout for the initial BOOTP/DHCP request used to be described by a
29 * counter of fixed-length timeout periods. TIMEOUT_COUNT represents
32 * Now that the timeout periods are variable (exponential backoff and retry)
33 * we convert the timeout count to the absolute time it would have take to
34 * execute that many retries, and keep sending retry packets until that time
37 #ifndef CONFIG_NET_RETRY_COUNT
38 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
40 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
42 #define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000)
44 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
45 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
47 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
48 #define CONFIG_DHCP_MIN_EXT_LEN 64
51 #ifndef CONFIG_BOOTP_ID_CACHE_SIZE
52 #define CONFIG_BOOTP_ID_CACHE_SIZE 4
55 u32 bootp_ids[CONFIG_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[64] = {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);
145 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
147 static void store_net_params(struct bootp_hdr *bp)
149 #if !defined(CONFIG_BOOTP_SERVERIP)
150 struct in_addr tmp_ip;
152 net_copy_ip(&tmp_ip, &bp->bp_siaddr);
153 if (tmp_ip.s_addr != 0)
154 net_copy_ip(&net_server_ip, &bp->bp_siaddr);
155 memcpy(net_server_ethaddr,
156 ((struct ethernet_hdr *)net_rx_packet)->et_src, 6);
158 #if defined(CONFIG_CMD_DHCP)
159 !(dhcp_option_overload & OVERLOAD_FILE) &&
161 (strlen(bp->bp_file) > 0)) {
162 copy_filename(net_boot_file_name, bp->bp_file,
163 sizeof(net_boot_file_name));
166 debug("net_boot_file_name: %s\n", net_boot_file_name);
168 /* Propagate to environment:
169 * don't delete exising entry when BOOTP / DHCP reply does
170 * not contain a new value
172 if (*net_boot_file_name)
173 setenv("bootfile", net_boot_file_name);
175 net_copy_ip(&net_ip, &bp->bp_yiaddr);
178 static int truncate_sz(const char *name, int maxlen, int curlen)
180 if (curlen >= maxlen) {
181 printf("*** WARNING: %s is too long (%d - max: %d)"
182 " - truncated\n", name, curlen, maxlen);
188 #if !defined(CONFIG_CMD_DHCP)
190 static void bootp_process_vendor_field(u8 *ext)
192 int size = *(ext + 1);
194 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
197 net_boot_file_expected_size_in_blocks = 0;
200 /* Fixed length fields */
201 case 1: /* Subnet mask */
202 if (net_netmask.s_addr == 0)
203 net_copy_ip(&net_netmask, (struct in_addr *)(ext + 2));
205 case 2: /* Time offset - Not yet supported */
207 /* Variable length fields */
208 case 3: /* Gateways list */
209 if (net_gateway.s_addr == 0)
210 net_copy_ip(&net_gateway, (struct in_addr *)(ext + 2));
212 case 4: /* Time server - Not yet supported */
214 case 5: /* IEN-116 name server - Not yet supported */
217 if (net_dns_server.s_addr == 0)
218 net_copy_ip(&net_dns_server,
219 (struct in_addr *)(ext + 2));
220 #if defined(CONFIG_BOOTP_DNS2)
221 if ((net_dns_server2.s_addr == 0) && (size > 4))
222 net_copy_ip(&net_dns_server2,
223 (struct in_addr *)(ext + 2 + 4));
226 case 7: /* Log server - Not yet supported */
228 case 8: /* Cookie/Quote server - Not yet supported */
230 case 9: /* LPR server - Not yet supported */
232 case 10: /* Impress server - Not yet supported */
234 case 11: /* RPL server - Not yet supported */
236 case 12: /* Host name */
237 if (net_hostname[0] == 0) {
238 size = truncate_sz("Host Name",
239 sizeof(net_hostname), size);
240 memcpy(&net_hostname, ext + 2, size);
241 net_hostname[size] = 0;
244 case 13: /* Boot file size */
246 net_boot_file_expected_size_in_blocks =
247 ntohs(*(ushort *)(ext + 2));
249 net_boot_file_expected_size_in_blocks =
250 ntohl(*(ulong *)(ext + 2));
252 case 14: /* Merit dump file - Not yet supported */
254 case 15: /* Domain name - Not yet supported */
256 case 16: /* Swap server - Not yet supported */
258 case 17: /* Root path */
259 if (net_root_path[0] == 0) {
260 size = truncate_sz("Root Path",
261 sizeof(net_root_path), size);
262 memcpy(&net_root_path, ext + 2, size);
263 net_root_path[size] = 0;
266 case 18: /* Extension path - Not yet supported */
268 * This can be used to send the information of the
269 * vendor area in another file that the client can
273 /* IP host layer fields */
274 case 40: /* NIS Domain name */
275 if (net_nis_domain[0] == 0) {
276 size = truncate_sz("NIS Domain Name",
277 sizeof(net_nis_domain), size);
278 memcpy(&net_nis_domain, ext + 2, size);
279 net_nis_domain[size] = 0;
282 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
283 case 42: /* NTP server IP */
284 net_copy_ip(&net_ntp_server, (struct in_addr *)(ext + 2));
287 /* Application layer fields */
288 case 43: /* Vendor specific info - Not yet supported */
290 * Binary information to exchange specific
291 * product information.
294 /* Reserved (custom) fields (128..254) */
298 static void bootp_process_vendor(u8 *ext, int size)
300 u8 *end = ext + size;
302 debug("[BOOTP] Checking extension (%d bytes)...\n", size);
304 while ((ext < end) && (*ext != 0xff)) {
312 bootp_process_vendor_field(opt);
316 debug("[BOOTP] Received fields:\n");
317 if (net_netmask.s_addr)
318 debug("net_netmask : %pI4\n", &net_netmask);
320 if (net_gateway.s_addr)
321 debug("net_gateway : %pI4", &net_gateway);
323 if (net_boot_file_expected_size_in_blocks)
324 debug("net_boot_file_expected_size_in_blocks : %d\n",
325 net_boot_file_expected_size_in_blocks);
328 debug("net_hostname : %s\n", net_hostname);
330 if (net_root_path[0])
331 debug("net_root_path : %s\n", net_root_path);
333 if (net_nis_domain[0])
334 debug("net_nis_domain : %s\n", net_nis_domain);
336 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
338 debug("net_ntp_server : %pI4\n", &net_ntp_server);
343 * Handle a BOOTP received packet.
345 static void bootp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
346 unsigned src, unsigned len)
348 struct bootp_hdr *bp;
350 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
351 src, dest, len, sizeof(struct bootp_hdr));
353 bp = (struct bootp_hdr *)pkt;
355 /* Filter out pkts we don't want */
356 if (check_reply_packet(pkt, dest, src, len))
360 * Got a good BOOTP reply. Copy the data into our variables.
362 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
363 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
366 store_net_params(bp); /* Store net parameters from reply */
368 /* Retrieve extended information (we must parse the vendor area) */
369 if (net_read_u32((u32 *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
370 bootp_process_vendor((uchar *)&bp->bp_vend[4], len);
372 net_set_timeout_handler(0, (thand_f *)0);
373 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
375 debug("Got good BOOTP\n");
382 * Timeout on BOOTP/DHCP request.
384 static void bootp_timeout_handler(void)
386 ulong time_taken = get_timer(bootp_start);
388 if (time_taken >= time_taken_max) {
389 #ifdef CONFIG_BOOTP_MAY_FAIL
390 puts("\nRetry time exceeded\n");
391 net_set_state(NETLOOP_FAIL);
393 puts("\nRetry time exceeded; starting again\n");
398 if (bootp_timeout > 2000)
399 bootp_timeout = 2000;
400 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
405 #define put_vci(e, str) \
407 size_t vci_strlen = strlen(str); \
408 *e++ = 60; /* Vendor Class Identifier */ \
410 memcpy(e, str, vci_strlen); \
415 * Initialize BOOTP extension fields in the request.
417 #if defined(CONFIG_CMD_DHCP)
418 static int dhcp_extended(u8 *e, int message_type, struct in_addr server_ip,
419 struct in_addr requested_ip)
423 #if defined(CONFIG_BOOTP_PXE)
428 #if defined(CONFIG_BOOTP_VENDOREX)
431 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
435 *e++ = 99; /* RFC1048 Magic Cookie */
440 *e++ = 53; /* DHCP Message Type */
444 *e++ = 57; /* Maximum DHCP Message Size */
446 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
447 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
449 if (server_ip.s_addr) {
450 int tmp = ntohl(server_ip.s_addr);
452 *e++ = 54; /* ServerID */
460 if (requested_ip.s_addr) {
461 int tmp = ntohl(requested_ip.s_addr);
463 *e++ = 50; /* Requested IP */
470 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
471 hostname = getenv("hostname");
473 int hostnamelen = strlen(hostname);
475 *e++ = 12; /* Hostname */
477 memcpy(e, hostname, hostnamelen);
482 #if defined(CONFIG_BOOTP_PXE)
483 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
484 *e++ = 93; /* Client System Architecture */
486 *e++ = (clientarch >> 8) & 0xff;
487 *e++ = clientarch & 0xff;
489 *e++ = 94; /* Client Network Interface Identifier */
491 *e++ = 1; /* type field for UNDI */
492 *e++ = 0; /* major revision */
493 *e++ = 0; /* minor revision */
495 uuid = getenv("pxeuuid");
498 if (uuid_str_valid(uuid)) {
499 *e++ = 97; /* Client Machine Identifier */
501 *e++ = 0; /* type 0 - UUID */
503 uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
506 printf("Invalid pxeuuid: %s\n", uuid);
511 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
512 put_vci(e, CONFIG_SPL_NET_VCI_STRING);
513 #elif defined(CONFIG_BOOTP_VCI_STRING)
514 put_vci(e, CONFIG_BOOTP_VCI_STRING);
517 #if defined(CONFIG_BOOTP_VENDOREX)
518 x = dhcp_vendorex_prep(e);
523 *e++ = 55; /* Parameter Request List */
524 cnt = e++; /* Pointer to count of requested items */
526 #if defined(CONFIG_BOOTP_SUBNETMASK)
527 *e++ = 1; /* Subnet Mask */
530 #if defined(CONFIG_BOOTP_TIMEOFFSET)
534 #if defined(CONFIG_BOOTP_GATEWAY)
535 *e++ = 3; /* Router Option */
538 #if defined(CONFIG_BOOTP_DNS)
539 *e++ = 6; /* DNS Server(s) */
542 #if defined(CONFIG_BOOTP_HOSTNAME)
543 *e++ = 12; /* Hostname */
546 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
547 *e++ = 13; /* Boot File Size */
550 #if defined(CONFIG_BOOTP_BOOTPATH)
551 *e++ = 17; /* Boot path */
554 #if defined(CONFIG_BOOTP_NISDOMAIN)
555 *e++ = 40; /* NIS Domain name request */
558 #if defined(CONFIG_BOOTP_NTPSERVER)
562 /* no options, so back up to avoid sending an empty request list */
566 *e++ = 255; /* End of the list */
568 /* Pad to minimal length */
569 #ifdef CONFIG_DHCP_MIN_EXT_LEN
570 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN)
579 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
581 static int bootp_extended(u8 *e)
585 *e++ = 99; /* RFC1048 Magic Cookie */
590 #if defined(CONFIG_CMD_DHCP)
591 *e++ = 53; /* DHCP Message Type */
593 *e++ = DHCP_DISCOVER;
595 *e++ = 57; /* Maximum DHCP Message Size */
597 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
598 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
601 #if defined(CONFIG_BOOTP_VCI_STRING) || \
602 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING))
603 #ifdef CONFIG_SPL_BUILD
604 put_vci(e, CONFIG_SPL_NET_VCI_STRING);
606 put_vci(e, CONFIG_BOOTP_VCI_STRING);
610 #if defined(CONFIG_BOOTP_SUBNETMASK)
611 *e++ = 1; /* Subnet mask request */
616 #if defined(CONFIG_BOOTP_GATEWAY)
617 *e++ = 3; /* Default gateway request */
622 #if defined(CONFIG_BOOTP_DNS)
623 *e++ = 6; /* Domain Name Server */
628 #if defined(CONFIG_BOOTP_HOSTNAME)
629 *e++ = 12; /* Host name request */
634 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
635 *e++ = 13; /* Boot file size */
640 #if defined(CONFIG_BOOTP_BOOTPATH)
641 *e++ = 17; /* Boot path */
646 #if defined(CONFIG_BOOTP_NISDOMAIN)
647 *e++ = 40; /* NIS Domain name request */
651 #if defined(CONFIG_BOOTP_NTPSERVER)
657 *e++ = 255; /* End of the list */
663 void bootp_reset(void)
667 bootp_start = get_timer(0);
671 void bootp_request(void)
674 struct bootp_hdr *bp;
675 int extlen, pktlen, iplen;
677 #ifdef CONFIG_BOOTP_RANDOM_DELAY
681 struct in_addr zero_ip;
682 struct in_addr bcast_ip;
683 char *ep; /* Environment pointer */
685 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
686 #if defined(CONFIG_CMD_DHCP)
690 ep = getenv("bootpretryperiod");
692 time_taken_max = simple_strtoul(ep, NULL, 10);
694 time_taken_max = TIMEOUT_MS;
696 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
700 if (bootp_try <= 2) /* Start with max 1024 * 1ms */
701 rand_ms = rand() >> (22 - bootp_try);
702 else /* After 3rd BOOTP request max 8192 * 1ms */
703 rand_ms = rand() >> 19;
705 printf("Random delay: %ld ms...\n", rand_ms);
708 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
710 printf("BOOTP broadcast %d\n", ++bootp_try);
712 memset((void *)pkt, 0, PKTSIZE);
714 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
718 * Next line results in incorrect packet size being transmitted,
719 * resulting in errors in some DHCP servers, reporting missing bytes.
720 * Size must be set in packet header after extension length has been
722 * C. Hallinan, DS4.COM, Inc.
724 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
725 sizeof (struct bootp_hdr)); */
726 iphdr = pkt; /* We need this later for net_set_udp_header() */
727 pkt += IP_UDP_HDR_SIZE;
729 bp = (struct bootp_hdr *)pkt;
730 bp->bp_op = OP_BOOTREQUEST;
731 bp->bp_htype = HWT_ETHER;
732 bp->bp_hlen = HWL_ETHER;
735 * according to RFC1542, should be 0 on first request, secs since
736 * first request otherwise
738 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
740 net_write_ip(&bp->bp_ciaddr, zero_ip);
741 net_write_ip(&bp->bp_yiaddr, zero_ip);
742 net_write_ip(&bp->bp_siaddr, zero_ip);
743 net_write_ip(&bp->bp_giaddr, zero_ip);
744 memcpy(bp->bp_chaddr, net_ethaddr, 6);
745 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
747 /* Request additional information from the BOOTP/DHCP server */
748 #if defined(CONFIG_CMD_DHCP)
749 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip,
752 extlen = bootp_extended((u8 *)bp->bp_vend);
756 * Bootp ID is the lower 4 bytes of our ethernet address
757 * plus the current time in ms.
759 bootp_id = ((u32)net_ethaddr[2] << 24)
760 | ((u32)net_ethaddr[3] << 16)
761 | ((u32)net_ethaddr[4] << 8)
762 | (u32)net_ethaddr[5];
763 bootp_id += get_timer(0);
764 bootp_id = htonl(bootp_id);
765 bootp_add_id(bootp_id);
766 net_copy_u32(&bp->bp_id, &bootp_id);
769 * Calculate proper packet lengths taking into account the
770 * variable size of the options field
772 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
773 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
774 bcast_ip.s_addr = 0xFFFFFFFFL;
775 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
776 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
778 #if defined(CONFIG_CMD_DHCP)
779 dhcp_state = SELECTING;
780 net_set_udp_handler(dhcp_handler);
782 net_set_udp_handler(bootp_handler);
784 net_send_packet(net_tx_packet, pktlen);
787 #if defined(CONFIG_CMD_DHCP)
788 static void dhcp_process_options(uchar *popt, uchar *end)
791 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
795 while (popt < end && *popt != 0xff) {
799 oplen = -1; /* Pad omits len byte */
802 net_copy_ip(&net_netmask, (popt + 2));
804 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
805 case 2: /* Time offset */
806 to_ptr = &net_ntp_time_offset;
807 net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2));
808 net_ntp_time_offset = ntohl(net_ntp_time_offset);
812 net_copy_ip(&net_gateway, (popt + 2));
815 net_copy_ip(&net_dns_server, (popt + 2));
816 #if defined(CONFIG_BOOTP_DNS2)
818 net_copy_ip(&net_dns_server2, (popt + 2 + 4));
822 size = truncate_sz("Host Name",
823 sizeof(net_hostname), oplen);
824 memcpy(&net_hostname, popt + 2, size);
825 net_hostname[size] = 0;
827 case 15: /* Ignore Domain Name Option */
830 size = truncate_sz("Root Path",
831 sizeof(net_root_path), oplen);
832 memcpy(&net_root_path, popt + 2, size);
833 net_root_path[size] = 0;
835 case 28: /* Ignore Broadcast Address Option */
837 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
838 case 42: /* NTP server IP */
839 net_copy_ip(&net_ntp_server, (popt + 2));
843 net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2));
846 dhcp_option_overload = popt[2];
848 case 53: /* Ignore Message Type Option */
851 net_copy_ip(&dhcp_server_ip, (popt + 2));
853 case 58: /* Ignore Renewal Time Option */
855 case 59: /* Ignore Rebinding Time Option */
857 case 66: /* Ignore TFTP server name */
859 case 67: /* Bootfile option */
860 size = truncate_sz("Bootfile",
861 sizeof(net_boot_file_name), oplen);
862 memcpy(&net_boot_file_name, popt + 2, size);
863 net_boot_file_name[size] = 0;
866 #if defined(CONFIG_BOOTP_VENDOREX)
867 if (dhcp_vendorex_proc(popt))
870 printf("*** Unhandled DHCP Option in OFFER/ACK:"
874 popt += oplen + 2; /* Process next option */
878 static void dhcp_packet_process_options(struct bootp_hdr *bp)
880 uchar *popt = (uchar *)&bp->bp_vend[4];
881 uchar *end = popt + BOOTP_HDR_SIZE;
883 if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC))
886 dhcp_option_overload = 0;
889 * The 'options' field MUST be interpreted first, 'file' next,
892 dhcp_process_options(popt, end);
894 if (dhcp_option_overload & OVERLOAD_FILE) {
895 popt = (uchar *)bp->bp_file;
896 end = popt + sizeof(bp->bp_file);
897 dhcp_process_options(popt, end);
900 if (dhcp_option_overload & OVERLOAD_SNAME) {
901 popt = (uchar *)bp->bp_sname;
902 end = popt + sizeof(bp->bp_sname);
903 dhcp_process_options(popt, end);
907 static int dhcp_message_type(unsigned char *popt)
909 if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC))
913 while (*popt != 0xff) {
914 if (*popt == 53) /* DHCP Message Type */
920 /* Scan through all options */
921 popt += *(popt + 1) + 2;
927 static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
930 struct bootp_hdr *bp;
931 int pktlen, iplen, extlen;
933 struct in_addr offered_ip;
934 struct in_addr zero_ip;
935 struct in_addr bcast_ip;
937 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
939 memset((void *)pkt, 0, PKTSIZE);
941 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
944 iphdr = pkt; /* We'll need this later to set proper pkt size */
945 pkt += IP_UDP_HDR_SIZE;
947 bp = (struct bootp_hdr *)pkt;
948 bp->bp_op = OP_BOOTREQUEST;
949 bp->bp_htype = HWT_ETHER;
950 bp->bp_hlen = HWL_ETHER;
952 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
953 /* Do not set the client IP, your IP, or server IP yet, since it
954 * hasn't been ACK'ed by the server yet */
957 * RFC3046 requires Relay Agents to discard packets with
958 * nonzero and offered giaddr
961 net_write_ip(&bp->bp_giaddr, zero_ip);
963 memcpy(bp->bp_chaddr, net_ethaddr, 6);
964 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
967 * ID is the id of the OFFER packet
970 net_copy_u32(&bp->bp_id, &bp_offer->bp_id);
973 * Copy options from OFFER packet if present
976 /* Copy offered IP into the parameters request list */
977 net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr);
978 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST,
979 dhcp_server_ip, offered_ip);
981 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
982 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
983 bcast_ip.s_addr = 0xFFFFFFFFL;
984 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
986 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
987 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
988 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
989 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
990 net_send_packet(net_tx_packet, pktlen);
994 * Handle DHCP received packets.
996 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
997 unsigned src, unsigned len)
999 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
1001 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1002 src, dest, len, dhcp_state);
1004 /* Filter out pkts we don't want */
1005 if (check_reply_packet(pkt, dest, src, len))
1008 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1009 "%d\n", src, dest, len, dhcp_state);
1011 if (net_read_ip(&bp->bp_yiaddr).s_addr == 0)
1014 switch (dhcp_state) {
1017 * Wait an appropriate time for any potential DHCPOFFER packets
1018 * to arrive. Then select one, and generate DHCPREQUEST
1019 * response. If filename is in format we recognize, assume it
1020 * is a valid OFFER from a server we want.
1022 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
1023 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1024 if (strncmp(bp->bp_file,
1025 CONFIG_SYS_BOOTFILE_PREFIX,
1026 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
1027 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1028 dhcp_packet_process_options(bp);
1029 efi_net_set_dhcp_ack(pkt, len);
1031 debug("TRANSITIONING TO REQUESTING STATE\n");
1032 dhcp_state = REQUESTING;
1034 net_set_timeout_handler(5000, bootp_timeout_handler);
1035 dhcp_send_request_packet(bp);
1036 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1038 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1043 debug("DHCP State: REQUESTING\n");
1045 if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) {
1046 dhcp_packet_process_options(bp);
1047 /* Store net params from reply */
1048 store_net_params(bp);
1050 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1051 &net_ip, get_timer(bootp_start));
1052 net_set_timeout_handler(0, (thand_f *)0);
1053 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
1061 /* DHCP client bound to address */
1064 puts("DHCP: INVALID STATE\n");
1069 void dhcp_request(void)
1073 #endif /* CONFIG_CMD_DHCP */