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>
17 #ifdef CONFIG_LED_STATUS
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 env_set("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_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE)
362 status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_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); \
413 static u8 *add_vci(u8 *e)
416 char *env_vci = env_get("bootp_vci");
418 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
419 vci = CONFIG_SPL_NET_VCI_STRING;
420 #elif defined(CONFIG_BOOTP_VCI_STRING)
421 vci = CONFIG_BOOTP_VCI_STRING;
434 * Initialize BOOTP extension fields in the request.
436 #if defined(CONFIG_CMD_DHCP)
437 static int dhcp_extended(u8 *e, int message_type, struct in_addr server_ip,
438 struct in_addr requested_ip)
442 #ifdef CONFIG_LIB_UUID
447 #if defined(CONFIG_BOOTP_VENDOREX)
450 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
454 *e++ = 99; /* RFC1048 Magic Cookie */
459 *e++ = 53; /* DHCP Message Type */
463 *e++ = 57; /* Maximum DHCP Message Size */
465 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
466 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
468 if (server_ip.s_addr) {
469 int tmp = ntohl(server_ip.s_addr);
471 *e++ = 54; /* ServerID */
479 if (requested_ip.s_addr) {
480 int tmp = ntohl(requested_ip.s_addr);
482 *e++ = 50; /* Requested IP */
489 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
490 hostname = env_get("hostname");
492 int hostnamelen = strlen(hostname);
494 *e++ = 12; /* Hostname */
496 memcpy(e, hostname, hostnamelen);
501 #ifdef CONFIG_BOOTP_PXE_CLIENTARCH
502 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
505 if (env_get("bootp_arch"))
506 clientarch = env_get_ulong("bootp_arch", 16, clientarch);
508 if (clientarch > 0) {
509 *e++ = 93; /* Client System Architecture */
511 *e++ = (clientarch >> 8) & 0xff;
512 *e++ = clientarch & 0xff;
515 *e++ = 94; /* Client Network Interface Identifier */
517 *e++ = 1; /* type field for UNDI */
518 *e++ = 0; /* major revision */
519 *e++ = 0; /* minor revision */
521 #ifdef CONFIG_LIB_UUID
522 uuid = env_get("pxeuuid");
525 if (uuid_str_valid(uuid)) {
526 *e++ = 97; /* Client Machine Identifier */
528 *e++ = 0; /* type 0 - UUID */
530 uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
533 printf("Invalid pxeuuid: %s\n", uuid);
540 #if defined(CONFIG_BOOTP_VENDOREX)
541 x = dhcp_vendorex_prep(e);
546 *e++ = 55; /* Parameter Request List */
547 cnt = e++; /* Pointer to count of requested items */
549 #if defined(CONFIG_BOOTP_SUBNETMASK)
550 *e++ = 1; /* Subnet Mask */
553 #if defined(CONFIG_BOOTP_TIMEOFFSET)
557 #if defined(CONFIG_BOOTP_GATEWAY)
558 *e++ = 3; /* Router Option */
561 #if defined(CONFIG_BOOTP_DNS)
562 *e++ = 6; /* DNS Server(s) */
565 #if defined(CONFIG_BOOTP_HOSTNAME)
566 *e++ = 12; /* Hostname */
569 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
570 *e++ = 13; /* Boot File Size */
573 #if defined(CONFIG_BOOTP_BOOTPATH)
574 *e++ = 17; /* Boot path */
577 #if defined(CONFIG_BOOTP_NISDOMAIN)
578 *e++ = 40; /* NIS Domain name request */
581 #if defined(CONFIG_BOOTP_NTPSERVER)
585 /* no options, so back up to avoid sending an empty request list */
589 *e++ = 255; /* End of the list */
591 /* Pad to minimal length */
592 #ifdef CONFIG_DHCP_MIN_EXT_LEN
593 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN)
602 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
604 static int bootp_extended(u8 *e)
608 *e++ = 99; /* RFC1048 Magic Cookie */
613 #if defined(CONFIG_CMD_DHCP)
614 *e++ = 53; /* DHCP Message Type */
616 *e++ = DHCP_DISCOVER;
618 *e++ = 57; /* Maximum DHCP Message Size */
620 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
621 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
626 #if defined(CONFIG_BOOTP_SUBNETMASK)
627 *e++ = 1; /* Subnet mask request */
632 #if defined(CONFIG_BOOTP_GATEWAY)
633 *e++ = 3; /* Default gateway request */
638 #if defined(CONFIG_BOOTP_DNS)
639 *e++ = 6; /* Domain Name Server */
644 #if defined(CONFIG_BOOTP_HOSTNAME)
645 *e++ = 12; /* Host name request */
650 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
651 *e++ = 13; /* Boot file size */
656 #if defined(CONFIG_BOOTP_BOOTPATH)
657 *e++ = 17; /* Boot path */
662 #if defined(CONFIG_BOOTP_NISDOMAIN)
663 *e++ = 40; /* NIS Domain name request */
667 #if defined(CONFIG_BOOTP_NTPSERVER)
673 *e++ = 255; /* End of the list */
676 * If nothing in list, remove it altogether. Some DHCP servers get
677 * upset by this minor faux pas and do not respond at all.
679 if (e == start + 3) {
680 printf("*** Warning: no DHCP options requested\n");
688 void bootp_reset(void)
692 bootp_start = get_timer(0);
696 void bootp_request(void)
699 struct bootp_hdr *bp;
700 int extlen, pktlen, iplen;
702 #ifdef CONFIG_BOOTP_RANDOM_DELAY
706 struct in_addr zero_ip;
707 struct in_addr bcast_ip;
708 char *ep; /* Environment pointer */
710 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
711 #if defined(CONFIG_CMD_DHCP)
715 ep = env_get("bootpretryperiod");
717 time_taken_max = simple_strtoul(ep, NULL, 10);
719 time_taken_max = TIMEOUT_MS;
721 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
725 if (bootp_try <= 2) /* Start with max 1024 * 1ms */
726 rand_ms = rand() >> (22 - bootp_try);
727 else /* After 3rd BOOTP request max 8192 * 1ms */
728 rand_ms = rand() >> 19;
730 printf("Random delay: %ld ms...\n", rand_ms);
733 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
735 printf("BOOTP broadcast %d\n", ++bootp_try);
737 memset((void *)pkt, 0, PKTSIZE);
739 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
743 * Next line results in incorrect packet size being transmitted,
744 * resulting in errors in some DHCP servers, reporting missing bytes.
745 * Size must be set in packet header after extension length has been
747 * C. Hallinan, DS4.COM, Inc.
749 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
750 sizeof (struct bootp_hdr)); */
751 iphdr = pkt; /* We need this later for net_set_udp_header() */
752 pkt += IP_UDP_HDR_SIZE;
754 bp = (struct bootp_hdr *)pkt;
755 bp->bp_op = OP_BOOTREQUEST;
756 bp->bp_htype = HWT_ETHER;
757 bp->bp_hlen = HWL_ETHER;
760 * according to RFC1542, should be 0 on first request, secs since
761 * first request otherwise
763 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
765 net_write_ip(&bp->bp_ciaddr, zero_ip);
766 net_write_ip(&bp->bp_yiaddr, zero_ip);
767 net_write_ip(&bp->bp_siaddr, zero_ip);
768 net_write_ip(&bp->bp_giaddr, zero_ip);
769 memcpy(bp->bp_chaddr, net_ethaddr, 6);
770 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
772 /* Request additional information from the BOOTP/DHCP server */
773 #if defined(CONFIG_CMD_DHCP)
774 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip,
777 extlen = bootp_extended((u8 *)bp->bp_vend);
781 * Bootp ID is the lower 4 bytes of our ethernet address
782 * plus the current time in ms.
784 bootp_id = ((u32)net_ethaddr[2] << 24)
785 | ((u32)net_ethaddr[3] << 16)
786 | ((u32)net_ethaddr[4] << 8)
787 | (u32)net_ethaddr[5];
788 bootp_id += get_timer(0);
789 bootp_id = htonl(bootp_id);
790 bootp_add_id(bootp_id);
791 net_copy_u32(&bp->bp_id, &bootp_id);
794 * Calculate proper packet lengths taking into account the
795 * variable size of the options field
797 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
798 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
799 bcast_ip.s_addr = 0xFFFFFFFFL;
800 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
801 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
803 #if defined(CONFIG_CMD_DHCP)
804 dhcp_state = SELECTING;
805 net_set_udp_handler(dhcp_handler);
807 net_set_udp_handler(bootp_handler);
809 net_send_packet(net_tx_packet, pktlen);
812 #if defined(CONFIG_CMD_DHCP)
813 static void dhcp_process_options(uchar *popt, uchar *end)
816 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
820 while (popt < end && *popt != 0xff) {
824 oplen = -1; /* Pad omits len byte */
827 net_copy_ip(&net_netmask, (popt + 2));
829 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
830 case 2: /* Time offset */
831 to_ptr = &net_ntp_time_offset;
832 net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2));
833 net_ntp_time_offset = ntohl(net_ntp_time_offset);
837 net_copy_ip(&net_gateway, (popt + 2));
840 net_copy_ip(&net_dns_server, (popt + 2));
841 #if defined(CONFIG_BOOTP_DNS2)
843 net_copy_ip(&net_dns_server2, (popt + 2 + 4));
847 size = truncate_sz("Host Name",
848 sizeof(net_hostname), oplen);
849 memcpy(&net_hostname, popt + 2, size);
850 net_hostname[size] = 0;
852 case 15: /* Ignore Domain Name Option */
855 size = truncate_sz("Root Path",
856 sizeof(net_root_path), oplen);
857 memcpy(&net_root_path, popt + 2, size);
858 net_root_path[size] = 0;
860 case 28: /* Ignore Broadcast Address Option */
862 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
863 case 42: /* NTP server IP */
864 net_copy_ip(&net_ntp_server, (popt + 2));
868 net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2));
871 dhcp_option_overload = popt[2];
873 case 53: /* Ignore Message Type Option */
876 net_copy_ip(&dhcp_server_ip, (popt + 2));
878 case 58: /* Ignore Renewal Time Option */
880 case 59: /* Ignore Rebinding Time Option */
882 case 66: /* Ignore TFTP server name */
884 case 67: /* Bootfile option */
885 size = truncate_sz("Bootfile",
886 sizeof(net_boot_file_name), oplen);
887 memcpy(&net_boot_file_name, popt + 2, size);
888 net_boot_file_name[size] = 0;
891 #if defined(CONFIG_BOOTP_VENDOREX)
892 if (dhcp_vendorex_proc(popt))
895 printf("*** Unhandled DHCP Option in OFFER/ACK:"
899 popt += oplen + 2; /* Process next option */
903 static void dhcp_packet_process_options(struct bootp_hdr *bp)
905 uchar *popt = (uchar *)&bp->bp_vend[4];
906 uchar *end = popt + BOOTP_HDR_SIZE;
908 if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC))
911 dhcp_option_overload = 0;
914 * The 'options' field MUST be interpreted first, 'file' next,
917 dhcp_process_options(popt, end);
919 if (dhcp_option_overload & OVERLOAD_FILE) {
920 popt = (uchar *)bp->bp_file;
921 end = popt + sizeof(bp->bp_file);
922 dhcp_process_options(popt, end);
925 if (dhcp_option_overload & OVERLOAD_SNAME) {
926 popt = (uchar *)bp->bp_sname;
927 end = popt + sizeof(bp->bp_sname);
928 dhcp_process_options(popt, end);
932 static int dhcp_message_type(unsigned char *popt)
934 if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC))
938 while (*popt != 0xff) {
939 if (*popt == 53) /* DHCP Message Type */
945 /* Scan through all options */
946 popt += *(popt + 1) + 2;
952 static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
955 struct bootp_hdr *bp;
956 int pktlen, iplen, extlen;
958 struct in_addr offered_ip;
959 struct in_addr zero_ip;
960 struct in_addr bcast_ip;
962 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
964 memset((void *)pkt, 0, PKTSIZE);
966 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
969 iphdr = pkt; /* We'll need this later to set proper pkt size */
970 pkt += IP_UDP_HDR_SIZE;
972 bp = (struct bootp_hdr *)pkt;
973 bp->bp_op = OP_BOOTREQUEST;
974 bp->bp_htype = HWT_ETHER;
975 bp->bp_hlen = HWL_ETHER;
977 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
978 /* Do not set the client IP, your IP, or server IP yet, since it
979 * hasn't been ACK'ed by the server yet */
982 * RFC3046 requires Relay Agents to discard packets with
983 * nonzero and offered giaddr
986 net_write_ip(&bp->bp_giaddr, zero_ip);
988 memcpy(bp->bp_chaddr, net_ethaddr, 6);
989 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
992 * ID is the id of the OFFER packet
995 net_copy_u32(&bp->bp_id, &bp_offer->bp_id);
998 * Copy options from OFFER packet if present
1001 /* Copy offered IP into the parameters request list */
1002 net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr);
1003 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST,
1004 dhcp_server_ip, offered_ip);
1006 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
1007 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
1008 bcast_ip.s_addr = 0xFFFFFFFFL;
1009 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
1011 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
1012 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
1013 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
1014 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
1015 net_send_packet(net_tx_packet, pktlen);
1019 * Handle DHCP received packets.
1021 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
1022 unsigned src, unsigned len)
1024 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
1026 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1027 src, dest, len, dhcp_state);
1029 /* Filter out pkts we don't want */
1030 if (check_reply_packet(pkt, dest, src, len))
1033 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1034 "%d\n", src, dest, len, dhcp_state);
1036 if (net_read_ip(&bp->bp_yiaddr).s_addr == 0)
1039 switch (dhcp_state) {
1042 * Wait an appropriate time for any potential DHCPOFFER packets
1043 * to arrive. Then select one, and generate DHCPREQUEST
1044 * response. If filename is in format we recognize, assume it
1045 * is a valid OFFER from a server we want.
1047 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
1048 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1049 if (strncmp(bp->bp_file,
1050 CONFIG_SYS_BOOTFILE_PREFIX,
1051 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
1052 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1053 dhcp_packet_process_options(bp);
1054 efi_net_set_dhcp_ack(pkt, len);
1056 debug("TRANSITIONING TO REQUESTING STATE\n");
1057 dhcp_state = REQUESTING;
1059 net_set_timeout_handler(5000, bootp_timeout_handler);
1060 dhcp_send_request_packet(bp);
1061 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1063 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1068 debug("DHCP State: REQUESTING\n");
1070 if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) {
1071 dhcp_packet_process_options(bp);
1072 /* Store net params from reply */
1073 store_net_params(bp);
1075 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1076 &net_ip, get_timer(bootp_start));
1077 net_set_timeout_handler(0, (thand_f *)0);
1078 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
1086 /* DHCP client bound to address */
1089 puts("DHCP: INVALID STATE\n");
1094 void dhcp_request(void)
1098 #endif /* CONFIG_CMD_DHCP */