2 * Copied from Linux Monitor (LiMon) - Networking.
4 * Copyright 1994 - 2000 Neil Russell.
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
14 * The user interface supports commands for BOOTP, RARP, and TFTP.
15 * Also, we support ARP internally. Depending on available data,
16 * these interact as follows:
20 * Prerequisites: - own ethernet address
21 * We want: - own IP address
22 * - TFTP server IP address
28 * Prerequisites: - own ethernet address
29 * We want: - own IP address
30 * - TFTP server IP address
35 * Prerequisites: - own ethernet address
37 * - TFTP server IP address
38 * We want: - TFTP server ethernet address
43 * Prerequisites: - own ethernet address
44 * We want: - IP, Netmask, ServerIP, Gateway IP
45 * - bootfilename, lease time
50 * Prerequisites: - own ethernet address
52 * - TFTP server IP address
53 * - TFTP server ethernet address
54 * - name of bootfile (if unknown, we use a default name
55 * derived from our own IP address)
56 * We want: - load the boot file
61 * Prerequisites: - own ethernet address
63 * - name of bootfile (if unknown, we use a default name
64 * derived from our own IP address)
65 * We want: - load the boot file
70 * Prerequisites: - own ethernet address
72 * We want: - network time
85 #ifdef CONFIG_STATUS_LED
86 #include <status_led.h>
89 #if defined(CONFIG_CMD_SNTP)
92 #if defined(CONFIG_CDP_VERSION)
93 #include <timestamp.h>
95 #if defined(CONFIG_CMD_DNS)
99 #if defined(CONFIG_CMD_NET)
101 DECLARE_GLOBAL_DATA_PTR;
103 #ifndef CONFIG_ARP_TIMEOUT
104 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
106 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
110 #ifndef CONFIG_NET_RETRY_COUNT
111 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
113 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
116 /** BOOTP EXTENTIONS **/
118 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
119 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
120 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
121 #if defined(CONFIG_BOOTP_DNS2)
122 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
124 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
125 char NetOurHostName[32]={0,}; /* Our hostname */
126 char NetOurRootPath[64]={0,}; /* Our bootpath */
127 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
129 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
133 /** END OF BOOTP EXTENTIONS **/
135 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
136 uchar NetOurEther[6]; /* Our ethernet address */
137 uchar NetServerEther[6] = /* Boot server enet address */
138 { 0, 0, 0, 0, 0, 0 };
139 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
140 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
141 volatile uchar *NetRxPacket; /* Current receive packet */
142 int NetRxPacketLen; /* Current rx packet length */
143 unsigned NetIPID; /* IP packet ID */
144 uchar NetBcastAddr[6] = /* Ethernet bcast address */
145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
146 uchar NetEtherNullAddr[6] =
147 { 0, 0, 0, 0, 0, 0 };
149 void (*push_packet)(volatile void *, int len) = 0;
151 #if defined(CONFIG_CMD_CDP)
152 uchar NetCDPAddr[6] = /* Ethernet bcast address */
153 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
155 int NetState; /* Network loop state */
156 #ifdef CONFIG_NET_MULTI
157 int NetRestartWrap = 0; /* Tried all network devices */
158 static int NetRestarted = 0; /* Network loop restarted */
159 static int NetDevExists = 0; /* At least one device configured */
162 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
163 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
164 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
166 char BootFile[128]; /* Boot File name */
168 #if defined(CONFIG_CMD_PING)
169 IPaddr_t NetPingIP; /* the ip address to ping */
171 static void PingStart(void);
174 #if defined(CONFIG_CMD_CDP)
175 static void CDPStart(void);
178 #if defined(CONFIG_CMD_SNTP)
179 IPaddr_t NetNtpServerIP; /* NTP server IP address */
180 int NetTimeOffset=0; /* offset time from UTC */
183 #ifdef CONFIG_NETCONSOLE
185 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
188 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
190 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
192 static rxhand_f *packetHandler; /* Current RX packet handler */
193 static thand_f *timeHandler; /* Current timeout handler */
194 static ulong timeStart; /* Time base value */
195 static ulong timeDelta; /* Current timeout value */
196 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
198 static int net_check_prereq (proto_t protocol);
200 static int NetTryCount;
202 /**********************************************************************/
204 IPaddr_t NetArpWaitPacketIP;
205 IPaddr_t NetArpWaitReplyIP;
206 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
207 uchar *NetArpWaitTxPacket; /* THE transmit packet */
208 int NetArpWaitTxPacketSize;
209 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
210 ulong NetArpWaitTimerStart;
213 void ArpRequest (void)
219 debug("ARP broadcast %d\n", NetArpWaitTry);
223 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
227 arp->ar_hrd = htons (ARP_ETHER);
228 arp->ar_pro = htons (PROT_IP);
231 arp->ar_op = htons (ARPOP_REQUEST);
233 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
234 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
235 for (i = 10; i < 16; ++i) {
236 arp->ar_data[i] = 0; /* dest ET addr = 0 */
239 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
240 (NetOurIP & NetOurSubnetMask)) {
241 if (NetOurGatewayIP == 0) {
242 puts ("## Warning: gatewayip needed but not set\n");
243 NetArpWaitReplyIP = NetArpWaitPacketIP;
245 NetArpWaitReplyIP = NetOurGatewayIP;
248 NetArpWaitReplyIP = NetArpWaitPacketIP;
251 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
252 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
255 void ArpTimeoutCheck(void)
259 if (!NetArpWaitPacketIP)
264 /* check for arp timeout */
265 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
268 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
269 puts ("\nARP Retry count exceeded; starting again\n");
273 NetArpWaitTimerStart = t;
280 NetInitLoop(proto_t protocol)
282 static int env_changed_id = 0;
284 int env_id = get_env_id ();
286 /* update only when the environment has changed */
287 if (env_changed_id != env_id) {
288 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
289 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
290 NetOurSubnetMask= getenv_IPaddr ("netmask");
291 NetServerIP = getenv_IPaddr ("serverip");
292 NetOurNativeVLAN = getenv_VLAN("nvlan");
293 NetOurVLAN = getenv_VLAN("vlan");
294 #if defined(CONFIG_CMD_DNS)
295 NetOurDNSIP = getenv_IPaddr("dnsip");
297 env_changed_id = env_id;
303 /**********************************************************************/
305 * Main network processing loop.
309 NetLoop(proto_t protocol)
313 #ifdef CONFIG_NET_MULTI
318 /* XXX problem with bss workaround */
319 NetArpWaitPacketMAC = NULL;
320 NetArpWaitTxPacket = NULL;
321 NetArpWaitPacketIP = 0;
322 NetArpWaitReplyIP = 0;
323 NetArpWaitTxPacket = NULL;
330 * Setup packet buffers, aligned correctly.
332 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
333 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
334 for (i = 0; i < PKTBUFSRX; i++) {
335 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
339 if (!NetArpWaitTxPacket) {
340 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
341 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
342 NetArpWaitTxPacketSize = 0;
346 #ifdef CONFIG_NET_MULTI
349 if (eth_init(bd) < 0) {
355 #ifdef CONFIG_NET_MULTI
356 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
358 eth_getenv_enetaddr("ethaddr", NetOurEther);
361 NetState = NETLOOP_CONTINUE;
364 * Start the ball rolling with the given start function. From
365 * here on, this code is a state machine driven by received
366 * packets and timer events.
368 NetInitLoop(protocol);
370 switch (net_check_prereq (protocol)) {
372 /* network not configured */
376 #ifdef CONFIG_NET_MULTI
378 /* network device not configured */
380 #endif /* CONFIG_NET_MULTI */
383 #ifdef CONFIG_NET_MULTI
388 /* always use ARP to get server ethernet address */
392 #if defined(CONFIG_CMD_DHCP)
396 DhcpRequest(); /* Basically same as BOOTP */
411 #if defined(CONFIG_CMD_PING)
416 #if defined(CONFIG_CMD_NFS)
421 #if defined(CONFIG_CMD_CDP)
426 #ifdef CONFIG_NETCONSOLE
431 #if defined(CONFIG_CMD_SNTP)
436 #if defined(CONFIG_CMD_DNS)
445 NetBootFileXferSize = 0;
449 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
450 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
452 * Echo the inverted link state to the fault LED.
454 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
455 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
457 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
459 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
460 #endif /* CONFIG_MII, ... */
463 * Main packet reception loop. Loop receiving packets until
464 * someone sets `NetState' to a state that terminates.
468 #ifdef CONFIG_SHOW_ACTIVITY
470 extern void show_activity(int arg);
475 * Check the ethernet for a new packet. The ethernet
476 * receive routine will process it.
481 * Abort if ctrl-c was pressed.
492 * Check for a timeout, and run the timeout handler
495 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
498 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
499 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
500 defined(CONFIG_STATUS_LED) && \
501 defined(STATUS_LED_RED)
503 * Echo the inverted link state to the fault LED.
505 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
506 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
508 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
510 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
511 #endif /* CONFIG_MII, ... */
513 timeHandler = (thand_f *)0;
520 case NETLOOP_RESTART:
521 #ifdef CONFIG_NET_MULTI
526 case NETLOOP_SUCCESS:
527 if (NetBootFileXferSize > 0) {
529 printf("Bytes transferred = %ld (%lx hex)\n",
531 NetBootFileXferSize);
532 sprintf(buf, "%lX", NetBootFileXferSize);
533 setenv("filesize", buf);
535 sprintf(buf, "%lX", (unsigned long)load_addr);
536 setenv("fileaddr", buf);
539 return NetBootFileXferSize;
547 /**********************************************************************/
550 startAgainTimeout(void)
552 NetState = NETLOOP_RESTART;
556 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
558 /* Totally ignore the packet */
561 void NetStartAgain (void)
564 int retry_forever = 0;
565 unsigned long retrycnt = 0;
567 nretry = getenv("netretry");
569 if (!strcmp(nretry, "yes"))
571 else if (!strcmp(nretry, "no"))
573 else if (!strcmp(nretry, "once"))
576 retrycnt = simple_strtoul(nretry, NULL, 0);
580 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
582 NetState = NETLOOP_FAIL;
588 #ifndef CONFIG_NET_MULTI
589 NetSetTimeout (10000UL, startAgainTimeout);
590 NetSetHandler (startAgainHandler);
591 #else /* !CONFIG_NET_MULTI*/
593 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
594 eth_try_another (!NetRestarted);
597 if (NetRestartWrap) {
600 NetSetTimeout (10000UL, startAgainTimeout);
601 NetSetHandler (startAgainHandler);
603 NetState = NETLOOP_FAIL;
606 NetState = NETLOOP_RESTART;
608 #endif /* CONFIG_NET_MULTI */
611 /**********************************************************************/
617 NetSetHandler(rxhand_f * f)
624 NetSetTimeout(ulong iv, thand_f * f)
627 timeHandler = (thand_f *)0;
630 timeStart = get_timer(0);
637 NetSendPacket(volatile uchar * pkt, int len)
639 (void) eth_send(pkt, len);
643 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
647 /* convert to new style broadcast */
651 /* if broadcast, make the ether address a broadcast and don't do ARP */
652 if (dest == 0xFFFFFFFF)
653 ether = NetBcastAddr;
655 /* if MAC address was not discovered yet, save the packet and do an ARP request */
656 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
658 debug("sending ARP for %08lx\n", dest);
660 NetArpWaitPacketIP = dest;
661 NetArpWaitPacketMAC = ether;
663 pkt = NetArpWaitTxPacket;
664 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
666 NetSetIP (pkt, dest, dport, sport, len);
667 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
669 /* size of the waiting packet */
670 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
672 /* and do the ARP request */
674 NetArpWaitTimerStart = get_timer(0);
676 return 1; /* waiting */
679 debug("sending UDP to %08lx/%pM\n", dest, ether);
681 pkt = (uchar *)NetTxPacket;
682 pkt += NetSetEther (pkt, ether, PROT_IP);
683 NetSetIP (pkt, dest, dport, sport, len);
684 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
686 return 0; /* transmitted */
689 #if defined(CONFIG_CMD_PING)
690 static ushort PingSeqNo;
699 /* XXX always send arp request */
701 memcpy(mac, NetEtherNullAddr, 6);
703 debug("sending ARP for %08lx\n", NetPingIP);
705 NetArpWaitPacketIP = NetPingIP;
706 NetArpWaitPacketMAC = mac;
708 pkt = NetArpWaitTxPacket;
709 pkt += NetSetEther(pkt, mac, PROT_IP);
711 ip = (volatile IP_t *)pkt;
714 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
716 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
718 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
719 ip->ip_id = htons(NetIPID++);
720 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
722 ip->ip_p = 0x01; /* ICMP */
724 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
725 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
726 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
728 s = &ip->udp_src; /* XXX ICMP starts here */
729 s[0] = htons(0x0800); /* echo-request, code */
730 s[1] = 0; /* checksum */
731 s[2] = 0; /* identifier */
732 s[3] = htons(PingSeqNo++); /* sequence number */
733 s[1] = ~NetCksum((uchar *)s, 8/2);
735 /* size of the waiting packet */
736 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
738 /* and do the ARP request */
740 NetArpWaitTimerStart = get_timer(0);
742 return 1; /* waiting */
749 NetState = NETLOOP_FAIL; /* we did not get the reply */
753 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
756 volatile IP_t *ip = (volatile IP_t *)pkt;
758 tmp = NetReadIP((void *)&ip->ip_src);
759 if (tmp != NetPingIP)
762 NetState = NETLOOP_SUCCESS;
765 static void PingStart(void)
767 #if defined(CONFIG_NET_MULTI)
768 printf ("Using %s device\n", eth_get_name());
769 #endif /* CONFIG_NET_MULTI */
770 NetSetTimeout (10000UL, PingTimeout);
771 NetSetHandler (PingHandler);
777 #if defined(CONFIG_CMD_CDP)
779 #define CDP_DEVICE_ID_TLV 0x0001
780 #define CDP_ADDRESS_TLV 0x0002
781 #define CDP_PORT_ID_TLV 0x0003
782 #define CDP_CAPABILITIES_TLV 0x0004
783 #define CDP_VERSION_TLV 0x0005
784 #define CDP_PLATFORM_TLV 0x0006
785 #define CDP_NATIVE_VLAN_TLV 0x000a
786 #define CDP_APPLIANCE_VLAN_TLV 0x000e
787 #define CDP_TRIGGER_TLV 0x000f
788 #define CDP_POWER_CONSUMPTION_TLV 0x0010
789 #define CDP_SYSNAME_TLV 0x0014
790 #define CDP_SYSOBJECT_TLV 0x0015
791 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
793 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
798 ushort CDPNativeVLAN;
799 ushort CDPApplianceVLAN;
801 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
803 static ushort CDP_compute_csum(const uchar *buff, ushort len)
812 odd = 1 & (ulong)buff;
822 if (result & 0x80000000)
823 result = (result & 0xFFFF) + (result >> 16);
827 leftover = (signed short)(*(const signed char *)buff);
828 /* CISCO SUCKS big time! (and blows too):
829 * CDP uses the IP checksum algorithm with a twist;
830 * for the last byte it *sign* extends and sums.
832 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
835 result = (result & 0xFFFF) + (result >> 16);
838 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
841 /* add up 16-bit and 17-bit words for 17+c bits */
842 result = (result & 0xffff) + (result >> 16);
843 /* add up 16-bit and 2-bit for 16+c bit */
844 result = (result & 0xffff) + (result >> 16);
846 result = (result & 0xffff) + (result >> 16);
849 csum = ~(ushort)result;
851 /* run time endian detection */
852 if (csum != htons(csum)) /* little endian */
858 int CDPSendTrigger(void)
866 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
867 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
872 et = (Ethernet_t *)pkt;
874 /* NOTE: trigger sent not on any VLAN */
876 /* form ethernet header */
877 memcpy(et->et_dest, NetCDPAddr, 6);
878 memcpy(et->et_src, NetOurEther, 6);
880 pkt += ETHER_HDR_SIZE;
883 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
884 pkt += sizeof(CDP_SNAP_hdr);
887 *pkt++ = 0x02; /* CDP version 2 */
888 *pkt++ = 180; /* TTL */
889 s = (volatile ushort *)pkt;
891 *s++ = htons(0); /* checksum (0 for later calculation) */
894 #ifdef CONFIG_CDP_DEVICE_ID
895 *s++ = htons(CDP_DEVICE_ID_TLV);
896 *s++ = htons(CONFIG_CDP_DEVICE_ID);
897 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
898 memcpy((uchar *)s, buf, 16);
902 #ifdef CONFIG_CDP_PORT_ID
903 *s++ = htons(CDP_PORT_ID_TLV);
904 memset(buf, 0, sizeof(buf));
905 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
907 if (len & 1) /* make it even */
909 *s++ = htons(len + 4);
910 memcpy((uchar *)s, buf, len);
914 #ifdef CONFIG_CDP_CAPABILITIES
915 *s++ = htons(CDP_CAPABILITIES_TLV);
917 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
921 #ifdef CONFIG_CDP_VERSION
922 *s++ = htons(CDP_VERSION_TLV);
923 memset(buf, 0, sizeof(buf));
924 strcpy(buf, CONFIG_CDP_VERSION);
926 if (len & 1) /* make it even */
928 *s++ = htons(len + 4);
929 memcpy((uchar *)s, buf, len);
933 #ifdef CONFIG_CDP_PLATFORM
934 *s++ = htons(CDP_PLATFORM_TLV);
935 memset(buf, 0, sizeof(buf));
936 strcpy(buf, CONFIG_CDP_PLATFORM);
938 if (len & 1) /* make it even */
940 *s++ = htons(len + 4);
941 memcpy((uchar *)s, buf, len);
945 #ifdef CONFIG_CDP_TRIGGER
946 *s++ = htons(CDP_TRIGGER_TLV);
948 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
952 #ifdef CONFIG_CDP_POWER_CONSUMPTION
953 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
955 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
958 /* length of ethernet packet */
959 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
960 et->et_protlen = htons(len);
962 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
963 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
968 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
978 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
983 /* if not OK try again */
987 NetState = NETLOOP_SUCCESS;
991 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
997 CDPHandler(const uchar * pkt, unsigned len)
1006 if (len < sizeof(CDP_SNAP_hdr) + 4)
1009 /* check for valid CDP SNAP header */
1010 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1013 pkt += sizeof(CDP_SNAP_hdr);
1014 len -= sizeof(CDP_SNAP_hdr);
1016 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1017 if (pkt[0] < 0x02 || pkt[1] == 0)
1020 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1022 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1025 if (CDP_compute_csum(pkt, len) != 0)
1037 ss = (const ushort *)pkt;
1038 type = ntohs(ss[0]);
1039 tlen = ntohs(ss[1]);
1047 ss += 2; /* point ss to the data of the TLV */
1051 case CDP_DEVICE_ID_TLV:
1053 case CDP_ADDRESS_TLV:
1055 case CDP_PORT_ID_TLV:
1057 case CDP_CAPABILITIES_TLV:
1059 case CDP_VERSION_TLV:
1061 case CDP_PLATFORM_TLV:
1063 case CDP_NATIVE_VLAN_TLV:
1066 case CDP_APPLIANCE_VLAN_TLV:
1067 t = (const uchar *)ss;
1073 ss = (const ushort *)(t + 1);
1075 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1076 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1079 vlan = ntohs(*ss); /* XXX will this work; dunno */
1084 case CDP_TRIGGER_TLV:
1086 case CDP_POWER_CONSUMPTION_TLV:
1088 case CDP_SYSNAME_TLV:
1090 case CDP_SYSOBJECT_TLV:
1092 case CDP_MANAGEMENT_ADDRESS_TLV:
1097 CDPApplianceVLAN = vlan;
1098 CDPNativeVLAN = nvlan;
1104 printf("** CDP packet is too short\n");
1108 static void CDPStart(void)
1110 #if defined(CONFIG_NET_MULTI)
1111 printf ("Using %s device\n", eth_get_name());
1116 CDPNativeVLAN = htons(-1);
1117 CDPApplianceVLAN = htons(-1);
1119 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1120 NetSetHandler (CDPDummyHandler);
1126 #ifdef CONFIG_IP_DEFRAG
1128 * This function collects fragments in a single packet, according
1129 * to the algorithm in RFC815. It returns NULL or the pointer to
1130 * a complete packet, in static storage
1132 #ifndef CONFIG_NET_MAXDEFRAG
1133 #define CONFIG_NET_MAXDEFRAG 16384
1136 * MAXDEFRAG, above, is chosen in the config file and is real data
1137 * so we need to add the NFS overhead, which is more than TFTP.
1138 * To use sizeof in the internal unnamed structures, we need a real
1139 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1140 * The compiler doesn't complain nor allocates the actual structure
1142 static struct rpc_t rpc_specimen;
1143 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1145 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1148 * this is the packet being assembled, either data or frag control.
1149 * Fragments go by 8 bytes, so this union must be 8 bytes long
1152 /* first_byte is address of this structure */
1153 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1154 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1155 u16 prev_hole; /* index of prev, 0 == none */
1159 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1161 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1162 static u16 first_hole, total_len;
1163 struct hole *payload, *thisfrag, *h, *newh;
1164 IP_t *localip = (IP_t *)pkt_buff;
1165 uchar *indata = (uchar *)ip;
1166 int offset8, start, len, done = 0;
1167 u16 ip_off = ntohs(ip->ip_off);
1169 /* payload starts after IP header, this fragment is in there */
1170 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1171 offset8 = (ip_off & IP_OFFS);
1172 thisfrag = payload + offset8;
1173 start = offset8 * 8;
1174 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1176 if (start + len > IP_MAXUDP) /* fragment extends too far */
1179 if (!total_len || localip->ip_id != ip->ip_id) {
1180 /* new (or different) packet, reset structs */
1182 payload[0].last_byte = ~0;
1183 payload[0].next_hole = 0;
1184 payload[0].prev_hole = 0;
1186 /* any IP header will work, copy the first we received */
1187 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1191 * What follows is the reassembly algorithm. We use the payload
1192 * array as a linked list of hole descriptors, as each hole starts
1193 * at a multiple of 8 bytes. However, last byte can be whatever value,
1194 * so it is represented as byte count, not as 8-byte blocks.
1197 h = payload + first_hole;
1198 while (h->last_byte < start) {
1199 if (!h->next_hole) {
1200 /* no hole that far away */
1203 h = payload + h->next_hole;
1206 if (offset8 + (len / 8) <= h - payload) {
1207 /* no overlap with holes (dup fragment?) */
1211 if (!(ip_off & IP_FLAGS_MFRAG)) {
1212 /* no more fragmentss: truncate this (last) hole */
1213 total_len = start + len;
1214 h->last_byte = start + len;
1218 * There is some overlap: fix the hole list. This code doesn't
1219 * deal with a fragment that overlaps with two different holes
1220 * (thus being a superset of a previously-received fragment).
1223 if ( (h >= thisfrag) && (h->last_byte <= start + len) ) {
1224 /* complete overlap with hole: remove hole */
1225 if (!h->prev_hole && !h->next_hole) {
1226 /* last remaining hole */
1228 } else if (!h->prev_hole) {
1230 first_hole = h->next_hole;
1231 payload[h->next_hole].prev_hole = 0;
1232 } else if (!h->next_hole) {
1234 payload[h->prev_hole].next_hole = 0;
1236 /* in the middle of the list */
1237 payload[h->next_hole].prev_hole = h->prev_hole;
1238 payload[h->prev_hole].next_hole = h->next_hole;
1241 } else if (h->last_byte <= start + len) {
1242 /* overlaps with final part of the hole: shorten this hole */
1243 h->last_byte = start;
1245 } else if (h >= thisfrag) {
1246 /* overlaps with initial part of the hole: move this hole */
1247 newh = thisfrag + (len / 8);
1251 payload[h->next_hole].prev_hole = (h - payload);
1253 payload[h->prev_hole].next_hole = (h - payload);
1255 first_hole = (h - payload);
1258 /* fragment sits in the middle: split the hole */
1259 newh = thisfrag + (len / 8);
1261 h->last_byte = start;
1262 h->next_hole = (newh - payload);
1263 newh->prev_hole = (h - payload);
1264 if (newh->next_hole)
1265 payload[newh->next_hole].prev_hole = (newh - payload);
1268 /* finally copy this fragment and possibly return whole packet */
1269 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1273 localip->ip_len = htons(total_len);
1274 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1278 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1280 u16 ip_off = ntohs(ip->ip_off);
1281 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1282 return ip; /* not a fragment */
1283 return __NetDefragment(ip, lenp);
1286 #else /* !CONFIG_IP_DEFRAG */
1288 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1290 u16 ip_off = ntohs(ip->ip_off);
1291 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1292 return ip; /* not a fragment */
1298 NetReceive(volatile uchar * inpkt, int len)
1306 #if defined(CONFIG_CMD_CDP)
1309 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1311 debug("packet received\n");
1313 NetRxPacket = inpkt;
1314 NetRxPacketLen = len;
1315 et = (Ethernet_t *)inpkt;
1317 /* too small packet? */
1318 if (len < ETHER_HDR_SIZE)
1323 (*push_packet)(inpkt, len);
1328 #if defined(CONFIG_CMD_CDP)
1329 /* keep track if packet is CDP */
1330 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1333 myvlanid = ntohs(NetOurVLAN);
1334 if (myvlanid == (ushort)-1)
1335 myvlanid = VLAN_NONE;
1336 mynvlanid = ntohs(NetOurNativeVLAN);
1337 if (mynvlanid == (ushort)-1)
1338 mynvlanid = VLAN_NONE;
1340 x = ntohs(et->et_protlen);
1342 debug("packet received\n");
1346 * Got a 802 packet. Check the other protocol field.
1348 x = ntohs(et->et_prot);
1350 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1351 len -= E802_HDR_SIZE;
1353 } else if (x != PROT_VLAN) { /* normal packet */
1354 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1355 len -= ETHER_HDR_SIZE;
1357 } else { /* VLAN packet */
1358 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1360 debug("VLAN packet received\n");
1362 /* too small packet? */
1363 if (len < VLAN_ETHER_HDR_SIZE)
1366 /* if no VLAN active */
1367 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1368 #if defined(CONFIG_CMD_CDP)
1374 cti = ntohs(vet->vet_tag);
1375 vlanid = cti & VLAN_IDMASK;
1376 x = ntohs(vet->vet_type);
1378 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1379 len -= VLAN_ETHER_HDR_SIZE;
1382 debug("Receive from protocol 0x%x\n", x);
1384 #if defined(CONFIG_CMD_CDP)
1386 CDPHandler((uchar *)ip, len);
1391 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1392 if (vlanid == VLAN_NONE)
1393 vlanid = (mynvlanid & VLAN_IDMASK);
1395 if (vlanid != (myvlanid & VLAN_IDMASK))
1403 * We have to deal with two types of ARP packets:
1404 * - REQUEST packets will be answered by sending our
1405 * IP address - if we know it.
1406 * - REPLY packates are expected only after we asked
1407 * for the TFTP server's or the gateway's ethernet
1408 * address; so if we receive such a packet, we set
1409 * the server ethernet address
1414 if (len < ARP_HDR_SIZE) {
1415 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1418 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1421 if (ntohs(arp->ar_pro) != PROT_IP) {
1424 if (arp->ar_hln != 6) {
1427 if (arp->ar_pln != 4) {
1431 if (NetOurIP == 0) {
1435 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1439 switch (ntohs(arp->ar_op)) {
1440 case ARPOP_REQUEST: /* reply with our IP address */
1441 debug("Got ARP REQUEST, return our IP\n");
1443 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1444 arp->ar_op = htons(ARPOP_REPLY);
1445 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1446 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1447 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1448 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1449 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1452 case ARPOP_REPLY: /* arp reply */
1453 /* are we waiting for a reply */
1454 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1457 #ifdef CONFIG_KEEP_SERVERADDR
1458 if (NetServerIP == NetArpWaitPacketIP) {
1460 sprintf(buf, "%pM", arp->ar_data);
1461 setenv("serveraddr", buf);
1465 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1468 tmp = NetReadIP(&arp->ar_data[6]);
1470 /* matched waiting packet's address */
1471 if (tmp == NetArpWaitReplyIP) {
1473 /* save address for later use */
1474 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1476 #ifdef CONFIG_NETCONSOLE
1477 (*packetHandler)(0,0,0,0);
1479 /* modify header, and transmit it */
1480 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1481 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1483 /* no arp request pending now */
1484 NetArpWaitPacketIP = 0;
1485 NetArpWaitTxPacketSize = 0;
1486 NetArpWaitPacketMAC = NULL;
1491 debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1497 debug("Got RARP\n");
1499 if (len < ARP_HDR_SIZE) {
1500 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1504 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1505 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1506 (ntohs(arp->ar_pro) != PROT_IP) ||
1507 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1509 puts ("invalid RARP header\n");
1511 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1512 if (NetServerIP == 0)
1513 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1514 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1516 (*packetHandler)(0,0,0,0);
1522 /* Before we start poking the header, make sure it is there */
1523 if (len < IP_HDR_SIZE) {
1524 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1527 /* Check the packet length */
1528 if (len < ntohs(ip->ip_len)) {
1529 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1532 len = ntohs(ip->ip_len);
1533 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1535 /* Can't deal with anything except IPv4 */
1536 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1539 /* Can't deal with IP options (headers != 20 bytes) */
1540 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1543 /* Check the Checksum of the header */
1544 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1545 puts ("checksum bad\n");
1548 /* If it is not for us, ignore it */
1549 tmp = NetReadIP(&ip->ip_dst);
1550 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1551 #ifdef CONFIG_MCAST_TFTP
1552 if (Mcast_addr != tmp)
1557 * The function returns the unchanged packet if it's not
1558 * a fragment, and either the complete packet or NULL if
1559 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1561 if (!(ip = NetDefragment(ip, &len)))
1564 * watch for ICMP host redirects
1566 * There is no real handler code (yet). We just watch
1567 * for ICMP host redirect messages. In case anybody
1568 * sees these messages: please contact me
1569 * (wd@denx.de), or - even better - send me the
1570 * necessary fixes :-)
1572 * Note: in all cases where I have seen this so far
1573 * it was a problem with the router configuration,
1574 * for instance when a router was configured in the
1575 * BOOTP reply, but the TFTP server was on the same
1576 * subnet. So this is probably a warning that your
1577 * configuration might be wrong. But I'm not really
1578 * sure if there aren't any other situations.
1580 if (ip->ip_p == IPPROTO_ICMP) {
1581 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1583 switch (icmph->type) {
1585 if (icmph->code != ICMP_REDIR_HOST)
1587 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1589 #if defined(CONFIG_CMD_PING)
1590 case ICMP_ECHO_REPLY:
1592 * IP header OK. Pass the packet to the current handler.
1594 /* XXX point to ip packet */
1595 (*packetHandler)((uchar *)ip, 0, 0, 0);
1597 case ICMP_ECHO_REQUEST:
1598 debug("Got ICMP ECHO REQUEST, return %d bytes \n",
1599 ETHER_HDR_SIZE + len);
1601 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1602 memcpy (&et->et_src[ 0], NetOurEther, 6);
1606 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1607 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1608 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1610 icmph->type = ICMP_ECHO_REPLY;
1611 icmph->checksum = 0;
1612 icmph->checksum = ~NetCksum((uchar *)icmph,
1613 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1614 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1620 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1624 #ifdef CONFIG_UDP_CHECKSUM
1625 if (ip->udp_xsum != 0) {
1631 xsum += (ntohs(ip->udp_len));
1632 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1633 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1634 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1635 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1637 sumlen = ntohs(ip->udp_len);
1638 sumptr = (ushort *) &(ip->udp_src);
1640 while (sumlen > 1) {
1643 sumdata = *sumptr++;
1644 xsum += ntohs(sumdata);
1650 sumdata = *(unsigned char *) sumptr;
1651 sumdata = (sumdata << 8) & 0xff00;
1654 while ((xsum >> 16) != 0) {
1655 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1657 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1658 printf(" UDP wrong checksum %08lx %08x\n",
1659 xsum, ntohs(ip->udp_xsum));
1666 #ifdef CONFIG_NETCONSOLE
1667 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1670 ntohs(ip->udp_len) - 8);
1673 * IP header OK. Pass the packet to the current handler.
1675 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1678 ntohs(ip->udp_len) - 8);
1684 /**********************************************************************/
1686 static int net_check_prereq (proto_t protocol)
1690 #if defined(CONFIG_CMD_PING)
1692 if (NetPingIP == 0) {
1693 puts ("*** ERROR: ping address not given\n");
1698 #if defined(CONFIG_CMD_SNTP)
1700 if (NetNtpServerIP == 0) {
1701 puts ("*** ERROR: NTP server address not given\n");
1706 #if defined(CONFIG_CMD_DNS)
1708 if (NetOurDNSIP == 0) {
1709 puts("*** ERROR: DNS server address not given\n");
1714 #if defined(CONFIG_CMD_NFS)
1719 if (NetServerIP == 0) {
1720 puts ("*** ERROR: `serverip' not set\n");
1723 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1727 if (NetOurIP == 0) {
1728 puts ("*** ERROR: `ipaddr' not set\n");
1737 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1738 #ifdef CONFIG_NET_MULTI
1739 extern int eth_get_dev_index (void);
1740 int num = eth_get_dev_index ();
1744 puts ("*** ERROR: No ethernet found.\n");
1747 puts ("*** ERROR: `ethaddr' not set\n");
1750 printf ("*** ERROR: `eth%daddr' not set\n",
1758 puts ("*** ERROR: `ethaddr' not set\n");
1766 return (0); /* OK */
1768 /**********************************************************************/
1771 NetCksumOk(uchar * ptr, int len)
1773 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1778 NetCksum(uchar * ptr, int len)
1781 ushort *p = (ushort *)ptr;
1786 xsum = (xsum & 0xffff) + (xsum >> 16);
1787 xsum = (xsum & 0xffff) + (xsum >> 16);
1788 return (xsum & 0xffff);
1796 myvlanid = ntohs(NetOurVLAN);
1797 if (myvlanid == (ushort)-1)
1798 myvlanid = VLAN_NONE;
1800 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1804 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1806 Ethernet_t *et = (Ethernet_t *)xet;
1809 myvlanid = ntohs(NetOurVLAN);
1810 if (myvlanid == (ushort)-1)
1811 myvlanid = VLAN_NONE;
1813 memcpy (et->et_dest, addr, 6);
1814 memcpy (et->et_src, NetOurEther, 6);
1815 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1816 et->et_protlen = htons(prot);
1817 return ETHER_HDR_SIZE;
1819 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1821 vet->vet_vlan_type = htons(PROT_VLAN);
1822 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1823 vet->vet_type = htons(prot);
1824 return VLAN_ETHER_HDR_SIZE;
1829 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1831 IP_t *ip = (IP_t *)xip;
1834 * If the data is an odd number of bytes, zero the
1835 * byte after the last byte so that the checksum
1839 xip[IP_HDR_SIZE + len] = 0;
1842 * Construct an IP and UDP header.
1843 * (need to set no fragment bit - XXX)
1845 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1847 ip->ip_len = htons(IP_HDR_SIZE + len);
1848 ip->ip_id = htons(NetIPID++);
1849 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1851 ip->ip_p = 17; /* UDP */
1853 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1854 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1855 ip->udp_src = htons(sport);
1856 ip->udp_dst = htons(dport);
1857 ip->udp_len = htons(8 + len);
1859 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1862 void copy_filename (char *dst, char *src, int size)
1864 if (*src && (*src == '"')) {
1869 while ((--size > 0) && *src && (*src != '"')) {
1877 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1879 * make port a little random, but use something trivial to compute
1881 unsigned int random_port(void)
1883 return 1024 + (get_timer(0) % 0x8000);;
1887 void ip_to_string (IPaddr_t x, char *s)
1890 sprintf (s, "%d.%d.%d.%d",
1891 (int) ((x >> 24) & 0xff),
1892 (int) ((x >> 16) & 0xff),
1893 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1897 IPaddr_t string_to_ip(char *s)
1906 for (addr=0, i=0; i<4; ++i) {
1907 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1909 addr |= (val & 0xFF);
1915 return (htonl(addr));
1918 void VLAN_to_string(ushort x, char *s)
1922 if (x == (ushort)-1)
1928 sprintf(s, "%d", x & VLAN_IDMASK);
1931 ushort string_to_VLAN(char *s)
1936 return htons(VLAN_NONE);
1938 if (*s < '0' || *s > '9')
1941 id = (ushort)simple_strtoul(s, NULL, 10);
1946 IPaddr_t getenv_IPaddr (char *var)
1948 return (string_to_ip(getenv(var)));
1951 ushort getenv_VLAN(char *var)
1953 return (string_to_VLAN(getenv(var)));