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 */
26
#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
27
#ifndef CONFIG_NET_RETRY_COUNT
28
# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
30
# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
33
#define PORT_BOOTPS 67 /* BOOTP server UDP port */
34
#define PORT_BOOTPC 68 /* BOOTP client UDP port */
36
#ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
37
#define CONFIG_DHCP_MIN_EXT_LEN 64
43
#if defined(CONFIG_CMD_DHCP)
44
static dhcp_state_t dhcp_state = INIT;
45
static unsigned long dhcp_leasetime;
46
static IPaddr_t NetDHCPServerIP;
47
static void DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
52
static char *dhcpmsg2str(int type)
55
case 1: return "DHCPDISCOVER"; break;
56
case 2: return "DHCPOFFER"; break;
57
case 3: return "DHCPREQUEST"; break;
58
case 4: return "DHCPDECLINE"; break;
59
case 5: return "DHCPACK"; break;
60
case 6: return "DHCPNACK"; break;
61
case 7: return "DHCPRELEASE"; break;
62
default: return "UNKNOWN/INVALID MSG TYPE"; break;
68
static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len)
70
struct Bootp_t *bp = (struct Bootp_t *) pkt;
73
if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
75
else if (len < sizeof(struct Bootp_t) - OPT_FIELD_SIZE)
77
else if (bp->bp_op != OP_BOOTREQUEST &&
78
bp->bp_op != OP_BOOTREPLY &&
79
bp->bp_op != DHCP_OFFER &&
80
bp->bp_op != DHCP_ACK &&
81
bp->bp_op != DHCP_NAK)
83
else if (bp->bp_htype != HWT_ETHER)
85
else if (bp->bp_hlen != HWL_ETHER)
87
else if (NetReadLong((ulong *)&bp->bp_id) != BootpID)
90
debug("Filtering pkt = %d\n", retval);
96
* Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
98
static void BootpCopyNetParams(struct Bootp_t *bp)
100
#if !defined(CONFIG_BOOTP_SERVERIP)
103
NetCopyIP(&tmp_ip, &bp->bp_siaddr);
105
NetCopyIP(&NetServerIP, &bp->bp_siaddr);
106
memcpy(NetServerEther, ((struct ethernet_hdr *)NetRxPacket)->et_src, 6);
108
NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
109
if (strlen(bp->bp_file) > 0)
110
copy_filename(BootFile, bp->bp_file, sizeof(BootFile));
112
debug("Bootfile: %s\n", BootFile);
114
/* Propagate to environment:
115
* don't delete exising entry when BOOTP / DHCP reply does
116
* not contain a new value
119
setenv("bootfile", BootFile);
122
static int truncate_sz(const char *name, int maxlen, int curlen)
124
if (curlen >= maxlen) {
125
printf("*** WARNING: %s is too long (%d - max: %d)"
126
" - truncated\n", name, curlen, maxlen);
132
#if !defined(CONFIG_CMD_DHCP)
134
static void BootpVendorFieldProcess(u8 *ext)
136
int size = *(ext + 1);
138
debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
144
/* Fixed length fields */
145
case 1: /* Subnet mask */
146
if (NetOurSubnetMask == 0)
147
NetCopyIP(&NetOurSubnetMask, (IPaddr_t *) (ext + 2));
149
case 2: /* Time offset - Not yet supported */
151
/* Variable length fields */
152
case 3: /* Gateways list */
153
if (NetOurGatewayIP == 0)
154
NetCopyIP(&NetOurGatewayIP, (IPaddr_t *) (ext + 2));
156
case 4: /* Time server - Not yet supported */
158
case 5: /* IEN-116 name server - Not yet supported */
161
if (NetOurDNSIP == 0)
162
NetCopyIP(&NetOurDNSIP, (IPaddr_t *) (ext + 2));
163
#if defined(CONFIG_BOOTP_DNS2)
164
if ((NetOurDNS2IP == 0) && (size > 4))
165
NetCopyIP(&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4));
168
case 7: /* Log server - Not yet supported */
170
case 8: /* Cookie/Quote server - Not yet supported */
172
case 9: /* LPR server - Not yet supported */
174
case 10: /* Impress server - Not yet supported */
176
case 11: /* RPL server - Not yet supported */
178
case 12: /* Host name */
179
if (NetOurHostName[0] == 0) {
180
size = truncate_sz("Host Name",
181
sizeof(NetOurHostName), size);
182
memcpy(&NetOurHostName, ext + 2, size);
183
NetOurHostName[size] = 0;
186
case 13: /* Boot file size */
188
NetBootFileSize = ntohs(*(ushort *) (ext + 2));
190
NetBootFileSize = ntohl(*(ulong *) (ext + 2));
192
case 14: /* Merit dump file - Not yet supported */
194
case 15: /* Domain name - Not yet supported */
196
case 16: /* Swap server - Not yet supported */
198
case 17: /* Root path */
199
if (NetOurRootPath[0] == 0) {
200
size = truncate_sz("Root Path",
201
sizeof(NetOurRootPath), size);
202
memcpy(&NetOurRootPath, ext + 2, size);
203
NetOurRootPath[size] = 0;
206
case 18: /* Extension path - Not yet supported */
208
* This can be used to send the information of the
209
* vendor area in another file that the client can
213
/* IP host layer fields */
214
case 40: /* NIS Domain name */
215
if (NetOurNISDomain[0] == 0) {
216
size = truncate_sz("NIS Domain Name",
217
sizeof(NetOurNISDomain), size);
218
memcpy(&NetOurNISDomain, ext + 2, size);
219
NetOurNISDomain[size] = 0;
222
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
223
case 42: /* NTP server IP */
224
NetCopyIP(&NetNtpServerIP, (IPaddr_t *) (ext + 2));
227
/* Application layer fields */
228
case 43: /* Vendor specific info - Not yet supported */
230
* Binary information to exchange specific
231
* product information.
234
/* Reserved (custom) fields (128..254) */
238
static void BootpVendorProcess(u8 *ext, int size)
240
u8 *end = ext + size;
242
debug("[BOOTP] Checking extension (%d bytes)...\n", size);
244
while ((ext < end) && (*ext != 0xff)) {
252
BootpVendorFieldProcess(opt);
256
debug("[BOOTP] Received fields:\n");
257
if (NetOurSubnetMask)
258
debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask);
261
debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP);
264
debug("NetBootFileSize : %d\n", NetBootFileSize);
266
if (NetOurHostName[0])
267
debug("NetOurHostName : %s\n", NetOurHostName);
269
if (NetOurRootPath[0])
270
debug("NetOurRootPath : %s\n", NetOurRootPath);
272
if (NetOurNISDomain[0])
273
debug("NetOurNISDomain : %s\n", NetOurNISDomain);
276
debug("NetBootFileSize: %d\n", NetBootFileSize);
278
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
280
debug("NetNtpServerIP : %pI4\n", &NetNtpServerIP);
285
* Handle a BOOTP received packet.
288
BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
293
debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
294
src, dest, len, sizeof(struct Bootp_t));
296
bp = (struct Bootp_t *)pkt;
298
/* Filter out pkts we don't want */
299
if (BootpCheckPkt(pkt, dest, src, len))
303
* Got a good BOOTP reply. Copy the data into our variables.
305
#ifdef CONFIG_STATUS_LED
306
status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
309
BootpCopyNetParams(bp); /* Store net parameters from reply */
311
/* Retrieve extended information (we must parse the vendor area) */
312
if (NetReadLong((ulong *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
313
BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
315
NetSetTimeout(0, (thand_f *)0);
316
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
318
debug("Got good BOOTP\n");
325
* Timeout on BOOTP/DHCP request.
330
if (BootpTry >= TIMEOUT_COUNT) {
331
#ifdef CONFIG_BOOTP_MAY_FAIL
332
puts("\nRetry count exceeded\n");
333
net_set_state(NETLOOP_FAIL);
335
puts("\nRetry count exceeded; starting again\n");
339
NetSetTimeout(TIMEOUT, BootpTimeout);
344
#define put_vci(e, str) \
346
size_t vci_strlen = strlen(str); \
347
*e++ = 60; /* Vendor Class Identifier */ \
349
memcpy(e, str, vci_strlen); \
354
* Initialize BOOTP extension fields in the request.
356
#if defined(CONFIG_CMD_DHCP)
357
static int DhcpExtended(u8 *e, int message_type, IPaddr_t ServerID,
358
IPaddr_t RequestedIP)
362
#if defined(CONFIG_BOOTP_PXE)
367
#if defined(CONFIG_BOOTP_VENDOREX)
370
#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
374
*e++ = 99; /* RFC1048 Magic Cookie */
379
*e++ = 53; /* DHCP Message Type */
383
*e++ = 57; /* Maximum DHCP Message Size */
385
*e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
386
*e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
389
int tmp = ntohl(ServerID);
391
*e++ = 54; /* ServerID */
400
int tmp = ntohl(RequestedIP);
402
*e++ = 50; /* Requested IP */
409
#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
410
hostname = getenv("hostname");
412
int hostnamelen = strlen(hostname);
414
*e++ = 12; /* Hostname */
416
memcpy(e, hostname, hostnamelen);
421
#if defined(CONFIG_BOOTP_PXE)
422
clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
423
*e++ = 93; /* Client System Architecture */
425
*e++ = (clientarch >> 8) & 0xff;
426
*e++ = clientarch & 0xff;
428
*e++ = 94; /* Client Network Interface Identifier */
430
*e++ = 1; /* type field for UNDI */
431
*e++ = 0; /* major revision */
432
*e++ = 0; /* minor revision */
434
uuid = getenv("pxeuuid");
437
if (uuid_str_valid(uuid)) {
438
*e++ = 97; /* Client Machine Identifier */
440
*e++ = 0; /* type 0 - UUID */
442
uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
445
printf("Invalid pxeuuid: %s\n", uuid);
450
#ifdef CONFIG_BOOTP_VCI_STRING
451
put_vci(e, CONFIG_BOOTP_VCI_STRING);
454
#if defined(CONFIG_BOOTP_VENDOREX)
455
x = dhcp_vendorex_prep(e);
460
*e++ = 55; /* Parameter Request List */
461
cnt = e++; /* Pointer to count of requested items */
463
#if defined(CONFIG_BOOTP_SUBNETMASK)
464
*e++ = 1; /* Subnet Mask */
467
#if defined(CONFIG_BOOTP_TIMEOFFSET)
471
#if defined(CONFIG_BOOTP_GATEWAY)
472
*e++ = 3; /* Router Option */
475
#if defined(CONFIG_BOOTP_DNS)
476
*e++ = 6; /* DNS Server(s) */
479
#if defined(CONFIG_BOOTP_HOSTNAME)
480
*e++ = 12; /* Hostname */
483
#if defined(CONFIG_BOOTP_BOOTFILESIZE)
484
*e++ = 13; /* Boot File Size */
487
#if defined(CONFIG_BOOTP_BOOTPATH)
488
*e++ = 17; /* Boot path */
491
#if defined(CONFIG_BOOTP_NISDOMAIN)
492
*e++ = 40; /* NIS Domain name request */
495
#if defined(CONFIG_BOOTP_NTPSERVER)
499
/* no options, so back up to avoid sending an empty request list */
503
*e++ = 255; /* End of the list */
505
/* Pad to minimal length */
506
#ifdef CONFIG_DHCP_MIN_EXT_LEN
507
while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN)
516
* Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
518
static int BootpExtended(u8 *e)
522
*e++ = 99; /* RFC1048 Magic Cookie */
527
#if defined(CONFIG_CMD_DHCP)
528
*e++ = 53; /* DHCP Message Type */
530
*e++ = DHCP_DISCOVER;
532
*e++ = 57; /* Maximum DHCP Message Size */
534
*e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
535
*e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
538
#if defined(CONFIG_BOOTP_VCI_STRING) || \
539
(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING))
540
#ifdef CONFIG_SPL_BUILD
541
put_vci(e, CONFIG_SPL_NET_VCI_STRING);
543
put_vci(e, CONFIG_BOOTP_VCI_STRING);
547
#if defined(CONFIG_BOOTP_SUBNETMASK)
548
*e++ = 1; /* Subnet mask request */
553
#if defined(CONFIG_BOOTP_GATEWAY)
554
*e++ = 3; /* Default gateway request */
559
#if defined(CONFIG_BOOTP_DNS)
560
*e++ = 6; /* Domain Name Server */
565
#if defined(CONFIG_BOOTP_HOSTNAME)
566
*e++ = 12; /* Host name request */
571
#if defined(CONFIG_BOOTP_BOOTFILESIZE)
572
*e++ = 13; /* Boot file size */
577
#if defined(CONFIG_BOOTP_BOOTPATH)
578
*e++ = 17; /* Boot path */
583
#if defined(CONFIG_BOOTP_NISDOMAIN)
584
*e++ = 40; /* NIS Domain name request */
588
#if defined(CONFIG_BOOTP_NTPSERVER)
594
*e++ = 255; /* End of the list */
605
int extlen, pktlen, iplen;
607
#ifdef CONFIG_BOOTP_RANDOM_DELAY
611
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
612
#if defined(CONFIG_CMD_DHCP)
616
#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
620
if (BootpTry <= 2) /* Start with max 1024 * 1ms */
621
rand_ms = rand() >> (22 - BootpTry);
622
else /* After 3rd BOOTP request max 8192 * 1ms */
623
rand_ms = rand() >> 19;
625
printf("Random delay: %ld ms...\n", rand_ms);
626
for (i = 0; i < rand_ms; i++)
627
udelay(1000); /*Wait 1ms*/
629
#endif /* CONFIG_BOOTP_RANDOM_DELAY */
631
printf("BOOTP broadcast %d\n", ++BootpTry);
633
memset((void *)pkt, 0, PKTSIZE);
635
eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_IP);
639
* Next line results in incorrect packet size being transmitted,
640
* resulting in errors in some DHCP servers, reporting missing bytes.
641
* Size must be set in packet header after extension length has been
643
* C. Hallinan, DS4.COM, Inc.
645
/* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
646
sizeof (struct Bootp_t)); */
647
iphdr = pkt; /* We need this later for net_set_udp_header() */
648
pkt += IP_UDP_HDR_SIZE;
650
bp = (struct Bootp_t *)pkt;
651
bp->bp_op = OP_BOOTREQUEST;
652
bp->bp_htype = HWT_ETHER;
653
bp->bp_hlen = HWL_ETHER;
655
bp->bp_secs = htons(get_timer(0) / 1000);
656
NetWriteIP(&bp->bp_ciaddr, 0);
657
NetWriteIP(&bp->bp_yiaddr, 0);
658
NetWriteIP(&bp->bp_siaddr, 0);
659
NetWriteIP(&bp->bp_giaddr, 0);
660
memcpy(bp->bp_chaddr, NetOurEther, 6);
661
copy_filename(bp->bp_file, BootFile, sizeof(bp->bp_file));
663
/* Request additional information from the BOOTP/DHCP server */
664
#if defined(CONFIG_CMD_DHCP)
665
extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0);
667
extlen = BootpExtended((u8 *)bp->bp_vend);
671
* Bootp ID is the lower 4 bytes of our ethernet address
672
* plus the current time in ms.
674
BootpID = ((ulong)NetOurEther[2] << 24)
675
| ((ulong)NetOurEther[3] << 16)
676
| ((ulong)NetOurEther[4] << 8)
677
| (ulong)NetOurEther[5];
678
BootpID += get_timer(0);
679
BootpID = htonl(BootpID);
680
NetCopyLong(&bp->bp_id, &BootpID);
683
* Calculate proper packet lengths taking into account the
684
* variable size of the options field
686
iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
687
pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
688
net_set_udp_header(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
689
NetSetTimeout(SELECT_TIMEOUT, BootpTimeout);
691
#if defined(CONFIG_CMD_DHCP)
692
dhcp_state = SELECTING;
693
net_set_udp_handler(DhcpHandler);
695
net_set_udp_handler(BootpHandler);
697
NetSendPacket(NetTxPacket, pktlen);
700
#if defined(CONFIG_CMD_DHCP)
701
static void DhcpOptionsProcess(uchar *popt, struct Bootp_t *bp)
703
uchar *end = popt + BOOTP_HDR_SIZE;
705
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
709
while (popt < end && *popt != 0xff) {
713
NetCopyIP(&NetOurSubnetMask, (popt + 2));
715
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
716
case 2: /* Time offset */
717
to_ptr = &NetTimeOffset;
718
NetCopyLong((ulong *)to_ptr, (ulong *)(popt + 2));
719
NetTimeOffset = ntohl(NetTimeOffset);
723
NetCopyIP(&NetOurGatewayIP, (popt + 2));
726
NetCopyIP(&NetOurDNSIP, (popt + 2));
727
#if defined(CONFIG_BOOTP_DNS2)
729
NetCopyIP(&NetOurDNS2IP, (popt + 2 + 4));
733
size = truncate_sz("Host Name",
734
sizeof(NetOurHostName), oplen);
735
memcpy(&NetOurHostName, popt + 2, size);
736
NetOurHostName[size] = 0;
738
case 15: /* Ignore Domain Name Option */
741
size = truncate_sz("Root Path",
742
sizeof(NetOurRootPath), oplen);
743
memcpy(&NetOurRootPath, popt + 2, size);
744
NetOurRootPath[size] = 0;
746
case 28: /* Ignore Broadcast Address Option */
748
#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
749
case 42: /* NTP server IP */
750
NetCopyIP(&NetNtpServerIP, (popt + 2));
754
NetCopyLong(&dhcp_leasetime, (ulong *) (popt + 2));
756
case 53: /* Ignore Message Type Option */
759
NetCopyIP(&NetDHCPServerIP, (popt + 2));
761
case 58: /* Ignore Renewal Time Option */
763
case 59: /* Ignore Rebinding Time Option */
765
case 66: /* Ignore TFTP server name */
767
case 67: /* vendor opt bootfile */
769
* I can't use dhcp_vendorex_proc here because I need
770
* to write into the bootp packet - even then I had to
771
* pass the bootp packet pointer into here as the
774
size = truncate_sz("Opt Boot File",
777
if (bp->bp_file[0] == '\0' && size > 0) {
779
* only use vendor boot file if we didn't
780
* receive a boot file in the main non-vendor
781
* part of the packet - god only knows why
782
* some vendors chose not to use this perfectly
783
* good spot to store the boot file (join on
784
* Tru64 Unix) it seems mind bogglingly crazy
787
printf("*** WARNING: using vendor "
788
"optional boot file\n");
789
memcpy(bp->bp_file, popt + 2, size);
790
bp->bp_file[size] = '\0';
794
#if defined(CONFIG_BOOTP_VENDOREX)
795
if (dhcp_vendorex_proc(popt))
798
printf("*** Unhandled DHCP Option in OFFER/ACK:"
802
popt += oplen + 2; /* Process next option */
806
static int DhcpMessageType(unsigned char *popt)
808
if (NetReadLong((ulong *)popt) != htonl(BOOTP_VENDOR_MAGIC))
812
while (*popt != 0xff) {
813
if (*popt == 53) /* DHCP Message Type */
815
popt += *(popt + 1) + 2; /* Scan through all options */
820
static void DhcpSendRequestPkt(struct Bootp_t *bp_offer)
824
int pktlen, iplen, extlen;
828
debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
830
memset((void *)pkt, 0, PKTSIZE);
832
eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_IP);
835
iphdr = pkt; /* We'll need this later to set proper pkt size */
836
pkt += IP_UDP_HDR_SIZE;
838
bp = (struct Bootp_t *)pkt;
839
bp->bp_op = OP_BOOTREQUEST;
840
bp->bp_htype = HWT_ETHER;
841
bp->bp_hlen = HWL_ETHER;
843
bp->bp_secs = htons(get_timer(0) / 1000);
844
/* Do not set the client IP, your IP, or server IP yet, since it
845
* hasn't been ACK'ed by the server yet */
848
* RFC3046 requires Relay Agents to discard packets with
849
* nonzero and offered giaddr
851
NetWriteIP(&bp->bp_giaddr, 0);
853
memcpy(bp->bp_chaddr, NetOurEther, 6);
856
* ID is the id of the OFFER packet
859
NetCopyLong(&bp->bp_id, &bp_offer->bp_id);
862
* Copy options from OFFER packet if present
865
/* Copy offered IP into the parameters request list */
866
NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr);
867
extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST,
868
NetDHCPServerIP, OfferedIP);
870
iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
871
pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
872
net_set_udp_header(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
874
#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
875
udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
876
#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
877
debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
878
NetSendPacket(NetTxPacket, pktlen);
882
* Handle DHCP received packets.
885
DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
888
struct Bootp_t *bp = (struct Bootp_t *)pkt;
890
debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
891
src, dest, len, dhcp_state);
893
/* Filter out pkts we don't want */
894
if (BootpCheckPkt(pkt, dest, src, len))
897
debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state:"
898
" %d\n", src, dest, len, dhcp_state);
900
switch (dhcp_state) {
903
* Wait an appropriate time for any potential DHCPOFFER packets
904
* to arrive. Then select one, and generate DHCPREQUEST
905
* response. If filename is in format we recognize, assume it
906
* is a valid OFFER from a server we want.
908
debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
909
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
910
if (strncmp(bp->bp_file,
911
CONFIG_SYS_BOOTFILE_PREFIX,
912
strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
913
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
915
debug("TRANSITIONING TO REQUESTING STATE\n");
916
dhcp_state = REQUESTING;
918
if (NetReadLong((ulong *)&bp->bp_vend[0]) ==
919
htonl(BOOTP_VENDOR_MAGIC))
920
DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
922
NetSetTimeout(TIMEOUT, BootpTimeout);
923
DhcpSendRequestPkt(bp);
924
#ifdef CONFIG_SYS_BOOTFILE_PREFIX
926
#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
931
debug("DHCP State: REQUESTING\n");
933
if (DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK) {
934
if (NetReadLong((ulong *)&bp->bp_vend[0]) ==
935
htonl(BOOTP_VENDOR_MAGIC))
936
DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
937
/* Store net params from reply */
938
BootpCopyNetParams(bp);
940
printf("DHCP client bound to address %pI4\n",
942
bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
950
/* DHCP client bound to address */
953
puts("DHCP: INVALID STATE\n");
959
void DhcpRequest(void)
963
#endif /* CONFIG_CMD_DHCP */