2 * Based on LiMon - BOOTP.
4 * Copyright 1994, 1995, 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
12 #define DEBUG 1 /* general debug */
13 #define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */
16 #ifdef DEBUG_BOOTP_EXT
17 #define debug_ext(fmt,args...) printf (fmt ,##args)
19 #define debug_ext(fmt,args...)
28 #ifdef CONFIG_STATUS_LED
29 #include <status_led.h>
32 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
34 #if (CONFIG_COMMANDS & CFG_CMD_NET)
36 #define TIMEOUT 5 /* Seconds before trying BOOTP again */
37 #ifndef CONFIG_NET_RETRY_COUNT
38 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
40 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
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
52 #ifdef CONFIG_BOOTP_RANDOM_DELAY
56 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
57 dhcp_state_t dhcp_state = INIT;
58 unsigned int dhcp_leasetime = 0;
59 static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len);
62 char *dhcpmsg2str(int type)
65 case 1: return "DHCPDISCOVER"; break;
66 case 2: return "DHCPOFFER"; break;
67 case 3: return "DHCPREQUEST"; break;
68 case 4: return "DHCPDECLINE"; break;
69 case 5: return "DHCPACK"; break;
70 case 6: return "DHCPNACK"; break;
71 case 7: return "DHCPRELEASE"; break;
72 default: return "UNKNOWN/INVALID MSG TYPE"; break;
76 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
77 extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */
78 extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */
81 #endif /* CFG_CMD_DHCP */
83 static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len)
85 Bootp_t *bp = (Bootp_t *) pkt;
88 if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
90 else if (len < sizeof (Bootp_t) - OPT_SIZE)
92 else if (bp->bp_op != OP_BOOTREQUEST &&
93 bp->bp_op != OP_BOOTREPLY &&
94 bp->bp_op != DHCP_OFFER &&
95 bp->bp_op != DHCP_ACK &&
96 bp->bp_op != DHCP_NAK ) {
99 else if (bp->bp_htype != HWT_ETHER)
101 else if (bp->bp_hlen != HWL_ETHER)
103 else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) {
107 debug ("Filtering pkt = %d\n", retval);
113 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
115 void BootpCopyNetParams(Bootp_t *bp)
117 NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
118 NetCopyIP(&NetServerIP, &bp->bp_siaddr);
119 memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6);
120 copy_filename (BootFile, bp->bp_file, sizeof(BootFile));
122 debug ("Bootfile: %s\n", BootFile);
124 /* Propagate to environment:
125 * don't delete exising entry when BOOTP / DHCP reply does
126 * not contain a new value
129 setenv ("bootfile", BootFile);
133 static int truncate_sz (const char *name, int maxlen, int curlen)
135 if (curlen >= maxlen) {
136 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
137 name, curlen, maxlen);
143 #if !(CONFIG_COMMANDS & CFG_CMD_DHCP)
145 static void BootpVendorFieldProcess(u8 *ext)
147 int size = *(ext+1) ;
149 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, *(ext+1));
154 /* Fixed length fields */
155 case 1: /* Subnet mask */
156 if (NetOurSubnetMask == 0)
157 NetCopyIP(&NetOurSubnetMask, (IPaddr_t*)(ext+2));
159 case 2: /* Time offset - Not yet supported */
161 /* Variable length fields */
162 case 3: /* Gateways list */
163 if (NetOurGatewayIP == 0) {
164 NetCopyIP(&NetOurGatewayIP, (IPaddr_t*)(ext+2));
167 case 4: /* Time server - Not yet supported */
169 case 5: /* IEN-116 name server - Not yet supported */
172 if (NetOurDNSIP == 0) {
173 NetCopyIP(&NetOurDNSIP, (IPaddr_t*)(ext+2));
176 case 7: /* Log server - Not yet supported */
178 case 8: /* Cookie/Quote server - Not yet supported */
180 case 9: /* LPR server - Not yet supported */
182 case 10: /* Impress server - Not yet supported */
184 case 11: /* RPL server - Not yet supported */
186 case 12: /* Host name */
187 if (NetOurHostName[0] == 0) {
188 size = truncate_sz("Host Name", sizeof(NetOurHostName), size);
189 memcpy(&NetOurHostName, ext+2, size);
190 NetOurHostName[size] = 0 ;
193 case 13: /* Boot file size */
195 NetBootFileSize = ntohs(*(ushort*)(ext+2));
197 NetBootFileSize = ntohl(*(ulong*)(ext+2));
199 case 14: /* Merit dump file - Not yet supported */
201 case 15: /* Domain name - Not yet supported */
203 case 16: /* Swap server - Not yet supported */
205 case 17: /* Root path */
206 if (NetOurRootPath[0] == 0) {
207 size = truncate_sz("Root Path", sizeof(NetOurRootPath), size);
208 memcpy(&NetOurRootPath, ext+2, size);
209 NetOurRootPath[size] = 0 ;
212 case 18: /* Extension path - Not yet supported */
214 * This can be used to send the informations of the
215 * vendor area in another file that the client can
219 /* IP host layer fields */
220 case 40: /* NIS Domain name */
221 if (NetOurNISDomain[0] == 0) {
222 size = truncate_sz ("NIS Domain Name",
223 sizeof(NetOurNISDomain),
225 memcpy(&NetOurNISDomain, ext+2, size);
226 NetOurNISDomain[size] = 0 ;
229 /* Application layer fields */
230 case 43: /* Vendor specific info - Not yet supported */
232 * Binary informations to exchange specific
233 * product information.
236 /* Reserved (custom) fields (128..254) */
240 static void BootpVendorProcess(u8 *ext, int size)
242 u8 *end = ext + size ;
244 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size);
246 while ((ext < end) && (*ext != 0xff)) {
253 BootpVendorFieldProcess (opt) ;
257 #ifdef DEBUG_BOOTP_EXT
258 printf("[BOOTP] Received fields: \n");
259 if (NetOurSubnetMask) {
260 puts ("NetOurSubnetMask : ");
261 print_IPaddr (NetOurSubnetMask);
265 if (NetOurGatewayIP) {
266 puts ("NetOurGatewayIP : ");
267 print_IPaddr (NetOurGatewayIP);
271 if (NetBootFileSize) {
272 printf("NetBootFileSize : %d\n", NetBootFileSize);
275 if (NetOurHostName[0]) {
276 printf("NetOurHostName : %s\n", NetOurHostName);
279 if (NetOurRootPath[0]) {
280 printf("NetOurRootPath : %s\n", NetOurRootPath);
283 if (NetOurNISDomain[0]) {
284 printf("NetOurNISDomain : %s\n", NetOurNISDomain);
287 if (NetBootFileSize) {
288 printf("NetBootFileSize: %d\n", NetBootFileSize);
290 #endif /* DEBUG_BOOTP_EXT */
294 * Handle a BOOTP received packet.
297 BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
302 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n",
303 src, dest, len, sizeof (Bootp_t));
307 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
311 * Got a good BOOTP reply. Copy the data into our variables.
313 #ifdef CONFIG_STATUS_LED
314 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
317 BootpCopyNetParams(bp); /* Store net parameters from reply */
319 /* Retrieve extended information (we must parse the vendor area) */
320 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
321 BootpVendorProcess(&bp->bp_vend[4], len);
323 NetSetTimeout(0, (thand_f *)0);
325 debug ("Got good BOOTP\n");
327 if (((s = getenv("autoload")) != NULL) && (*s == 'n')) {
329 * Just use BOOTP to configure system;
330 * Do not use TFTP to load the bootfile.
332 NetState = NETLOOP_SUCCESS;
336 /* Send ARP request to get TFTP server ethernet address.
337 * This automagically starts TFTP, too.
341 #endif /* !CFG_CMD_DHCP */
344 * Timeout on BOOTP/DHCP request.
349 if (BootpTry >= TIMEOUT_COUNT) {
350 puts ("\nRetry count exceeded; starting again\n");
353 NetSetTimeout (TIMEOUT * CFG_HZ, BootpTimeout);
359 * Initialize BOOTP extension fields in the request.
361 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
362 static int DhcpExtended(u8 *e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP)
366 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
370 *e++ = 99; /* RFC1048 Magic Cookie */
375 *e++ = 53; /* DHCP Message Type */
379 *e++ = 57; /* Maximum DHCP Message Size */
381 *e++ = (576-312+OPT_SIZE) >> 8;
382 *e++ = (576-312+OPT_SIZE) & 0xff;
385 int tmp = ntohl(ServerID);
387 *e++ = 54; /* ServerID */
396 int tmp = ntohl(RequestedIP);
398 *e++ = 50; /* Requested IP */
406 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
407 if ((x = dhcp_vendorex_prep (e)))
411 *e++ = 55; /* Parameter Request List */
412 cnt = e++; /* Pointer to count of requested items */
414 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
415 *e++ = 1; /* Subnet Mask */
418 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
419 *e++ = 3; /* Router Option */
422 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
423 *e++ = 6; /* DNS Server(s) */
426 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
427 *e++ = 12; /* Hostname */
430 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
431 *e++ = 13; /* Boot File Size */
434 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
435 *e++ = 17; /* Boot path */
438 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
439 *e++ = 40; /* NIS Domain name request */
442 *e++ = 255; /* End of the list */
444 /* Pad to minimal length */
445 #ifdef CONFIG_DHCP_MIN_EXT_LEN
446 while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN)
453 #else /* CFG_CMD_DHCP */
455 * Warning: no field size check - change CONFIG_BOOTP_MASK at your own risk!
457 static int BootpExtended (u8 *e)
461 *e++ = 99; /* RFC1048 Magic Cookie */
466 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
467 *e++ = 53; /* DHCP Message Type */
469 *e++ = DHCP_DISCOVER;
471 *e++ = 57; /* Maximum DHCP Message Size */
473 *e++ = (576-312+OPT_SIZE) >> 16;
474 *e++ = (576-312+OPT_SIZE) & 0xff;
475 #endif /* CFG_CMD_DHCP */
477 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK)
478 *e++ = 1; /* Subnet mask request */
483 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY)
484 *e++ = 3; /* Default gateway request */
489 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS)
490 *e++ = 6; /* Domain Name Server */
495 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME)
496 *e++ = 12; /* Host name request */
501 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE)
502 *e++ = 13; /* Boot file size */
507 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH)
508 *e++ = 17; /* Boot path */
513 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN)
514 *e++ = 40; /* NIS Domain name request */
519 *e++ = 255; /* End of the list */
523 #endif /* CFG_CMD_DHCP */
528 volatile uchar *pkt, *iphdr;
530 int ext_len, pktlen, iplen;
532 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
536 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
537 unsigned char bi_enetaddr[6];
541 ulong tst1, tst2, sum, m_mask, m_value = 0;
545 reg = getenv_r ("ethaddr", tmp, sizeof(tmp));
546 s = (reg > 0) ? tmp : NULL;
548 for (reg=0; reg<6; ++reg) {
549 bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0;
555 printf("BootpRequest => Our Mac: ");
556 for (reg=0; reg<6; reg++) {
559 reg==5 ? '\n' : ':');
563 /* Mac-Manipulation 2 get seed1 */
566 for (reg=2; reg<6; reg++) {
568 tst1 = tst1 | bi_enetaddr[reg];
570 for (reg=0; reg<2; reg++) {
571 tst2 = tst2 | bi_enetaddr[reg];
579 for (reg=1;reg<=32;reg++) {
580 m_value |= (m_mask & seed1);
582 m_value = m_value << 1;
588 /* Random Number Generator */
590 for (reg=0;reg<=0;reg++) {
592 if (sum < seed1 || sum < seed2)
597 if (BootpTry<=2) { /* Start with max 1024 * 1ms */
598 sum = sum >> (22-BootpTry);
599 } else { /*After 3rd BOOTP request max 8192 * 1ms */
604 printf ("Random delay: %ld ms...\n", sum);
605 for (reg=0; reg <sum; reg++) {
606 udelay(1000); /*Wait 1ms*/
608 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
610 printf("BOOTP broadcast %d\n", ++BootpTry);
612 memset ((void*)pkt, 0, PKTSIZE);
614 NetSetEther(pkt, NetBcastAddr, PROT_IP);
615 pkt += ETHER_HDR_SIZE;
618 * Next line results in incorrect packet size being transmitted, resulting
619 * in errors in some DHCP servers, reporting missing bytes. Size must be
620 * set in packet header after extension length has been determined.
621 * C. Hallinan, DS4.COM, Inc.
623 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
624 iphdr = pkt; /* We need this later for NetSetIP() */
628 bp->bp_op = OP_BOOTREQUEST;
629 bp->bp_htype = HWT_ETHER;
630 bp->bp_hlen = HWL_ETHER;
632 bp->bp_secs = htons(get_timer(0) / CFG_HZ);
633 NetWriteIP(&bp->bp_ciaddr, 0);
634 NetWriteIP(&bp->bp_yiaddr, 0);
635 NetWriteIP(&bp->bp_siaddr, 0);
636 NetWriteIP(&bp->bp_giaddr, 0);
637 memcpy (bp->bp_chaddr, NetOurEther, 6);
638 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file));
640 /* Request additional information from the BOOTP/DHCP server */
641 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
642 ext_len = DhcpExtended(bp->bp_vend, DHCP_DISCOVER, 0, 0);
644 ext_len = BootpExtended(bp->bp_vend);
645 #endif /* CFG_CMD_DHCP */
648 * Bootp ID is the lower 4 bytes of our ethernet address
649 * plus the current time in HZ.
651 BootpID = ((ulong)NetOurEther[2] << 24)
652 | ((ulong)NetOurEther[3] << 16)
653 | ((ulong)NetOurEther[4] << 8)
654 | (ulong)NetOurEther[5];
655 BootpID += get_timer(0);
656 BootpID = htonl(BootpID);
657 NetCopyLong(&bp->bp_id, &BootpID);
660 * Calculate proper packet lengths taking into account the
661 * variable size of the options field
663 pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + ext_len;
664 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
665 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
666 NetSetTimeout(SELECT_TIMEOUT * CFG_HZ, BootpTimeout);
668 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
669 dhcp_state = SELECTING;
670 NetSetHandler(DhcpHandler);
672 NetSetHandler(BootpHandler);
673 #endif /* CFG_CMD_DHCP */
674 NetSendPacket(NetTxPacket, pktlen);
677 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
678 void DhcpOptionsProcess(char *popt)
680 char *end = popt + BOOTP_HDR_SIZE;
683 while ( popt < end && *popt != 0xff ) {
687 NetCopyIP(&NetOurSubnetMask, (popt+2));
690 NetCopyIP(&NetOurGatewayIP, (popt+2));
693 NetCopyIP(&NetOurDNSIP, (popt+2));
696 size = truncate_sz ("Host Name",
697 sizeof(NetOurHostName),
699 memcpy(&NetOurHostName, popt+2, size);
700 NetOurHostName[size] = 0 ;
702 case 15: /* Ignore Domain Name Option */
705 size = truncate_sz ("Root Path",
706 sizeof(NetOurRootPath),
708 memcpy(&NetOurRootPath, popt+2, size);
709 NetOurRootPath[size] = 0 ;
712 dhcp_leasetime = *(unsigned int *)(popt + 2);
714 case 53: /* Ignore Message Type Option */
717 NetCopyIP(&NetServerIP, (popt+2));
719 case 58: /* Ignore Renewal Time Option */
721 case 59: /* Ignore Rebinding Time Option */
724 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX)
725 if (dhcp_vendorex_proc(popt))
728 printf("*** Unhandled DHCP Option in OFFER/ACK: %d\n",
732 popt += oplen + 2; /* Process next option */
736 static int DhcpMessageType(unsigned char *popt)
738 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC))
742 while ( *popt != 0xff ) {
743 if ( *popt == 53 ) /* DHCP Message Type */
745 popt += *(popt + 1) + 2; /* Scan through all options */
750 void DhcpSendRequestPkt(Bootp_t *bp_offer)
752 volatile uchar *pkt, *iphdr;
754 int pktlen, iplen, extlen;
756 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
758 memset ((void*)pkt, 0, PKTSIZE);
760 NetSetEther(pkt, NetBcastAddr, PROT_IP);
761 pkt += ETHER_HDR_SIZE;
763 iphdr = pkt; /* We'll need this later to set proper pkt size */
767 bp->bp_op = OP_BOOTREQUEST;
768 bp->bp_htype = HWT_ETHER;
769 bp->bp_hlen = HWL_ETHER;
771 bp->bp_secs = htons(get_timer(0) / CFG_HZ);
772 NetCopyIP(&bp->bp_ciaddr, &bp_offer->bp_ciaddr); /* both in network byte order */
773 NetCopyIP(&bp->bp_yiaddr, &bp_offer->bp_yiaddr);
774 NetCopyIP(&bp->bp_siaddr, &bp_offer->bp_siaddr);
775 NetCopyIP(&bp->bp_giaddr, &bp_offer->bp_giaddr);
776 memcpy (bp->bp_chaddr, NetOurEther, 6);
779 * ID is the id of the OFFER packet
782 NetCopyLong(&bp->bp_id, &bp_offer->bp_id);
785 * Copy options from OFFER packet if present
787 extlen = DhcpExtended(bp->bp_vend, DHCP_REQUEST, NetServerIP, bp->bp_yiaddr);
789 pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + extlen;
790 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
791 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
793 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
794 NetSendPacket(NetTxPacket, pktlen);
798 * Handle DHCP received packets.
801 DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
803 Bootp_t *bp = (Bootp_t *)pkt;
805 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
806 src, dest, len, dhcp_state);
808 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
811 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
812 src, dest, len, dhcp_state);
814 switch (dhcp_state) {
817 * Wait an appropriate time for any potential DHCPOFFER packets
818 * to arrive. Then select one, and generate DHCPREQUEST response.
819 * If filename is in format we recognize, assume it is a valid
820 * OFFER from a server we want.
822 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
823 #ifdef CFG_BOOTFILE_PREFIX
824 if (strncmp(bp->bp_file,
826 strlen(CFG_BOOTFILE_PREFIX)) == 0 ) {
827 #endif /* CFG_BOOTFILE_PREFIX */
829 debug ("TRANSITIONING TO REQUESTING STATE\n");
830 dhcp_state = REQUESTING;
832 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
833 DhcpOptionsProcess(&bp->bp_vend[4]);
836 BootpCopyNetParams(bp); /* Store net params from reply */
838 NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout);
839 DhcpSendRequestPkt(bp);
840 #ifdef CFG_BOOTFILE_PREFIX
842 #endif /* CFG_BOOTFILE_PREFIX */
847 debug ("DHCP State: REQUESTING\n");
849 if ( DhcpMessageType(bp->bp_vend) == DHCP_ACK ) {
852 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
853 DhcpOptionsProcess(&bp->bp_vend[4]);
854 BootpCopyNetParams(bp); /* Store net params from reply */
856 printf("DHCP client bound to address ");
857 print_IPaddr(NetOurIP);
860 /* Obey the 'autoload' setting */
861 if (((s = getenv("autoload")) != NULL) && (*s == 'n')) {
862 NetState = NETLOOP_SUCCESS;
865 /* Send ARP request to get TFTP server ethernet address.
866 * This automagically starts TFTP, too.
873 printf("DHCP: INVALID STATE\n");
879 void DhcpRequest(void)
883 #endif /* CFG_CMD_DHCP */
885 #endif /* CFG_CMD_NET */