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 (CONFIG_COMMANDS & CFG_CMD_SNTP)
93 #if (CONFIG_COMMANDS & CFG_CMD_NET)
95 #define ARP_TIMEOUT 5 /* Seconds before trying ARP again */
96 #ifndef CONFIG_NET_RETRY_COUNT
97 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
99 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
106 /** BOOTP EXTENTIONS **/
108 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
109 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
110 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
111 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2)
112 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
114 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
115 char NetOurHostName[32]={0,}; /* Our hostname */
116 char NetOurRootPath[64]={0,}; /* Our bootpath */
117 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
119 /** END OF BOOTP EXTENTIONS **/
121 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
122 uchar NetOurEther[6]; /* Our ethernet address */
123 uchar NetServerEther[6] = /* Boot server enet address */
124 { 0, 0, 0, 0, 0, 0 };
125 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
126 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */
127 volatile uchar *NetRxPkt; /* Current receive packet */
128 int NetRxPktLen; /* Current rx packet length */
129 unsigned NetIPID; /* IP packet ID */
130 uchar NetBcastAddr[6] = /* Ethernet bcast address */
131 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
132 uchar NetEtherNullAddr[6] =
133 { 0, 0, 0, 0, 0, 0 };
134 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
135 uchar NetCDPAddr[6] = /* Ethernet bcast address */
136 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
138 int NetState; /* Network loop state */
139 #ifdef CONFIG_NET_MULTI
140 int NetRestartWrap = 0; /* Tried all network devices */
141 static int NetRestarted = 0; /* Network loop restarted */
142 static int NetDevExists = 0; /* At least one device configured */
145 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
146 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
147 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
149 char BootFile[128]; /* Boot File name */
151 #if (CONFIG_COMMANDS & CFG_CMD_PING)
152 IPaddr_t NetPingIP; /* the ip address to ping */
154 static void PingStart(void);
157 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
158 static void CDPStart(void);
161 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
162 IPaddr_t NetNtpServerIP; /* NTP server IP address */
163 int NetTimeOffset=0; /* offset time from UTC */
166 #ifdef CONFIG_NETCONSOLE
168 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
171 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
173 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
175 static rxhand_f *packetHandler; /* Current RX packet handler */
176 static thand_f *timeHandler; /* Current timeout handler */
177 static ulong timeStart; /* Time base value */
178 static ulong timeDelta; /* Current timeout value */
179 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
181 static int net_check_prereq (proto_t protocol);
183 /**********************************************************************/
185 IPaddr_t NetArpWaitPacketIP;
186 IPaddr_t NetArpWaitReplyIP;
187 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
188 uchar *NetArpWaitTxPacket; /* THE transmit packet */
189 int NetArpWaitTxPacketSize;
190 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
191 ulong NetArpWaitTimerStart;
194 void ArpRequest (void)
201 printf ("ARP broadcast %d\n", NetArpWaitTry);
205 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
209 arp->ar_hrd = htons (ARP_ETHER);
210 arp->ar_pro = htons (PROT_IP);
213 arp->ar_op = htons (ARPOP_REQUEST);
215 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
216 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
217 for (i = 10; i < 16; ++i) {
218 arp->ar_data[i] = 0; /* dest ET addr = 0 */
221 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
222 (NetOurIP & NetOurSubnetMask)) {
223 if (NetOurGatewayIP == 0) {
224 puts ("## Warning: gatewayip needed but not set\n");
225 NetArpWaitReplyIP = NetArpWaitPacketIP;
227 NetArpWaitReplyIP = NetOurGatewayIP;
230 NetArpWaitReplyIP = NetArpWaitPacketIP;
233 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
234 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
237 void ArpTimeoutCheck(void)
241 if (!NetArpWaitPacketIP)
246 /* check for arp timeout */
247 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) {
250 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
251 puts ("\nARP Retry count exceeded; starting again\n");
255 NetArpWaitTimerStart = t;
261 /**********************************************************************/
263 * Main network processing loop.
267 NetLoop(proto_t protocol)
269 DECLARE_GLOBAL_DATA_PTR;
273 #ifdef CONFIG_NET_MULTI
278 /* XXX problem with bss workaround */
279 NetArpWaitPacketMAC = NULL;
280 NetArpWaitTxPacket = NULL;
281 NetArpWaitPacketIP = 0;
282 NetArpWaitReplyIP = 0;
283 NetArpWaitTxPacket = NULL;
289 * Setup packet buffers, aligned correctly.
291 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
292 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
293 for (i = 0; i < PKTBUFSRX; i++) {
294 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
298 if (!NetArpWaitTxPacket) {
299 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
300 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
301 NetArpWaitTxPacketSize = 0;
305 #ifdef CONFIG_NET_MULTI
308 if (eth_init(bd) < 0) {
314 #ifdef CONFIG_NET_MULTI
315 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
317 memcpy (NetOurEther, bd->bi_enetaddr, 6);
320 NetState = NETLOOP_CONTINUE;
323 * Start the ball rolling with the given start function. From
324 * here on, this code is a state machine driven by received
325 * packets and timer events.
329 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
332 #if (CONFIG_COMMANDS & CFG_CMD_PING)
335 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
340 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
341 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
342 NetOurSubnetMask= getenv_IPaddr ("netmask");
343 NetOurVLAN = getenv_VLAN("vlan");
344 NetOurNativeVLAN = getenv_VLAN("nvlan");
347 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
352 NetServerIP = getenv_IPaddr ("serverip");
354 #if (CONFIG_COMMANDS & CFG_CMD_PING)
359 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
372 * initialize our IP addr to 0 in order to accept ANY
373 * IP addr assigned to us by the BOOTP / RARP server
376 NetServerIP = getenv_IPaddr ("serverip");
377 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
378 NetOurNativeVLAN = getenv_VLAN("nvlan");
380 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
381 NetOurNativeVLAN = getenv_VLAN("nvlan");
387 switch (net_check_prereq (protocol)) {
389 /* network not configured */
393 #ifdef CONFIG_NET_MULTI
395 /* network device not configured */
397 #endif /* CONFIG_NET_MULTI */
400 #ifdef CONFIG_NET_MULTI
405 /* always use ARP to get server ethernet address */
409 #if (CONFIG_COMMANDS & CFG_CMD_DHCP)
411 /* Start with a clean slate... */
414 NetServerIP = getenv_IPaddr ("serverip");
415 DhcpRequest(); /* Basically same as BOOTP */
417 #endif /* CFG_CMD_DHCP */
428 #if (CONFIG_COMMANDS & CFG_CMD_PING)
433 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
438 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
443 #ifdef CONFIG_NETCONSOLE
448 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
457 NetBootFileXferSize = 0;
461 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
462 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
464 * Echo the inverted link state to the fault LED.
466 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
467 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
469 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
471 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
472 #endif /* CONFIG_MII, ... */
475 * Main packet reception loop. Loop receiving packets until
476 * someone sets `NetState' to a state that terminates.
480 #ifdef CONFIG_SHOW_ACTIVITY
482 extern void show_activity(int arg);
487 * Check the ethernet for a new packet. The ethernet
488 * receive routine will process it.
493 * Abort if ctrl-c was pressed.
504 * Check for a timeout, and run the timeout handler
507 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
510 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
511 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \
512 defined(CONFIG_STATUS_LED) && \
513 defined(STATUS_LED_RED)
515 * Echo the inverted link state to the fault LED.
517 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
518 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
520 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
522 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
523 #endif /* CONFIG_MII, ... */
525 timeHandler = (thand_f *)0;
532 case NETLOOP_RESTART:
533 #ifdef CONFIG_NET_MULTI
538 case NETLOOP_SUCCESS:
539 if (NetBootFileXferSize > 0) {
541 printf("Bytes transferred = %ld (%lx hex)\n",
543 NetBootFileXferSize);
544 sprintf(buf, "%lx", NetBootFileXferSize);
545 setenv("filesize", buf);
547 sprintf(buf, "%lX", (unsigned long)load_addr);
548 setenv("fileaddr", buf);
551 return NetBootFileXferSize;
559 /**********************************************************************/
562 startAgainTimeout(void)
564 NetState = NETLOOP_RESTART;
568 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
570 /* Totally ignore the packet */
573 void NetStartAgain (void)
575 #ifdef CONFIG_NET_MULTI
576 DECLARE_GLOBAL_DATA_PTR;
579 int noretry = 0, once = 0;
581 if ((nretry = getenv ("netretry")) != NULL) {
582 noretry = (strcmp (nretry, "no") == 0);
583 once = (strcmp (nretry, "once") == 0);
587 NetState = NETLOOP_FAIL;
590 #ifndef CONFIG_NET_MULTI
591 NetSetTimeout (10 * CFG_HZ, startAgainTimeout);
592 NetSetHandler (startAgainHandler);
593 #else /* !CONFIG_NET_MULTI*/
595 eth_try_another (!NetRestarted);
597 if (NetRestartWrap) {
599 if (NetDevExists && !once) {
600 NetSetTimeout (10 * CFG_HZ, 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) {
659 printf("sending ARP for %08lx\n", dest);
661 NetArpWaitPacketIP = dest;
662 NetArpWaitPacketMAC = ether;
664 pkt = NetArpWaitTxPacket;
665 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
667 NetSetIP (pkt, dest, dport, sport, len);
668 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
670 /* size of the waiting packet */
671 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
673 /* and do the ARP request */
675 NetArpWaitTimerStart = get_timer(0);
677 return 1; /* waiting */
681 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
682 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
685 pkt = (uchar *)NetTxPacket;
686 pkt += NetSetEther (pkt, ether, PROT_IP);
687 NetSetIP (pkt, dest, dport, sport, len);
688 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
690 return 0; /* transmitted */
693 #if (CONFIG_COMMANDS & CFG_CMD_PING)
694 static ushort PingSeqNo;
703 /* XXX always send arp request */
705 memcpy(mac, NetEtherNullAddr, 6);
708 printf("sending ARP for %08lx\n", NetPingIP);
711 NetArpWaitPacketIP = NetPingIP;
712 NetArpWaitPacketMAC = mac;
714 pkt = NetArpWaitTxPacket;
715 pkt += NetSetEther(pkt, mac, PROT_IP);
717 ip = (volatile IP_t *)pkt;
720 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
722 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
724 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
725 ip->ip_id = htons(NetIPID++);
726 ip->ip_off = htons(0x4000); /* No fragmentation */
728 ip->ip_p = 0x01; /* ICMP */
730 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
731 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
732 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
734 s = &ip->udp_src; /* XXX ICMP starts here */
735 s[0] = htons(0x0800); /* echo-request, code */
736 s[1] = 0; /* checksum */
737 s[2] = 0; /* identifier */
738 s[3] = htons(PingSeqNo++); /* sequence number */
739 s[1] = ~NetCksum((uchar *)s, 8/2);
741 /* size of the waiting packet */
742 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
744 /* and do the ARP request */
746 NetArpWaitTimerStart = get_timer(0);
748 return 1; /* waiting */
755 NetState = NETLOOP_FAIL; /* we did not get the reply */
759 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
762 volatile IP_t *ip = (volatile IP_t *)pkt;
764 tmp = NetReadIP((void *)&ip->ip_src);
765 if (tmp != NetPingIP)
768 NetState = NETLOOP_SUCCESS;
771 static void PingStart(void)
773 #if defined(CONFIG_NET_MULTI)
774 printf ("Using %s device\n", eth_get_name());
775 #endif /* CONFIG_NET_MULTI */
776 NetSetTimeout (10 * CFG_HZ, PingTimeout);
777 NetSetHandler (PingHandler);
781 #endif /* CFG_CMD_PING */
783 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
785 #define CDP_DEVICE_ID_TLV 0x0001
786 #define CDP_ADDRESS_TLV 0x0002
787 #define CDP_PORT_ID_TLV 0x0003
788 #define CDP_CAPABILITIES_TLV 0x0004
789 #define CDP_VERSION_TLV 0x0005
790 #define CDP_PLATFORM_TLV 0x0006
791 #define CDP_NATIVE_VLAN_TLV 0x000a
792 #define CDP_APPLIANCE_VLAN_TLV 0x000e
793 #define CDP_TRIGGER_TLV 0x000f
794 #define CDP_POWER_CONSUMPTION_TLV 0x0010
795 #define CDP_SYSNAME_TLV 0x0014
796 #define CDP_SYSOBJECT_TLV 0x0015
797 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
799 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */
804 ushort CDPNativeVLAN;
805 ushort CDPApplianceVLAN;
807 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
809 static ushort CDP_compute_csum(const uchar *buff, ushort len)
818 odd = 1 & (ulong)buff;
828 if (result & 0x80000000)
829 result = (result & 0xFFFF) + (result >> 16);
833 leftover = (signed short)(*(const signed char *)buff);
834 /* CISCO SUCKS big time! (and blows too):
835 * CDP uses the IP checksum algorithm with a twist;
836 * for the last byte it *sign* extends and sums.
838 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
841 result = (result & 0xFFFF) + (result >> 16);
844 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
847 /* add up 16-bit and 17-bit words for 17+c bits */
848 result = (result & 0xffff) + (result >> 16);
849 /* add up 16-bit and 2-bit for 16+c bit */
850 result = (result & 0xffff) + (result >> 16);
852 result = (result & 0xffff) + (result >> 16);
855 csum = ~(ushort)result;
857 /* run time endian detection */
858 if (csum != htons(csum)) /* little endian */
864 int CDPSendTrigger(void)
872 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
873 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
878 et = (Ethernet_t *)pkt;
880 /* NOTE: trigger sent not on any VLAN */
882 /* form ethernet header */
883 memcpy(et->et_dest, NetCDPAddr, 6);
884 memcpy(et->et_src, NetOurEther, 6);
886 pkt += ETHER_HDR_SIZE;
889 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
890 pkt += sizeof(CDP_SNAP_hdr);
893 *pkt++ = 0x02; /* CDP version 2 */
894 *pkt++ = 180; /* TTL */
895 s = (volatile ushort *)pkt;
897 *s++ = htons(0); /* checksum (0 for later calculation) */
900 #ifdef CONFIG_CDP_DEVICE_ID
901 *s++ = htons(CDP_DEVICE_ID_TLV);
902 *s++ = htons(CONFIG_CDP_DEVICE_ID);
903 memset(buf, 0, sizeof(buf));
904 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
905 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
906 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
907 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
908 memcpy((uchar *)s, buf, 16);
912 #ifdef CONFIG_CDP_PORT_ID
913 *s++ = htons(CDP_PORT_ID_TLV);
914 memset(buf, 0, sizeof(buf));
915 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
917 if (len & 1) /* make it even */
919 *s++ = htons(len + 4);
920 memcpy((uchar *)s, buf, len);
924 #ifdef CONFIG_CDP_CAPABILITIES
925 *s++ = htons(CDP_CAPABILITIES_TLV);
927 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
931 #ifdef CONFIG_CDP_VERSION
932 *s++ = htons(CDP_VERSION_TLV);
933 memset(buf, 0, sizeof(buf));
934 strcpy(buf, CONFIG_CDP_VERSION);
936 if (len & 1) /* make it even */
938 *s++ = htons(len + 4);
939 memcpy((uchar *)s, buf, len);
943 #ifdef CONFIG_CDP_PLATFORM
944 *s++ = htons(CDP_PLATFORM_TLV);
945 memset(buf, 0, sizeof(buf));
946 strcpy(buf, CONFIG_CDP_PLATFORM);
948 if (len & 1) /* make it even */
950 *s++ = htons(len + 4);
951 memcpy((uchar *)s, buf, len);
955 #ifdef CONFIG_CDP_TRIGGER
956 *s++ = htons(CDP_TRIGGER_TLV);
958 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
962 #ifdef CONFIG_CDP_POWER_CONSUMPTION
963 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
965 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
968 /* length of ethernet packet */
969 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
970 et->et_protlen = htons(len);
972 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
973 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
978 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
988 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
993 /* if not OK try again */
997 NetState = NETLOOP_SUCCESS;
1001 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
1007 CDPHandler(const uchar * pkt, unsigned len)
1016 if (len < sizeof(CDP_SNAP_hdr) + 4)
1019 /* check for valid CDP SNAP header */
1020 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1023 pkt += sizeof(CDP_SNAP_hdr);
1024 len -= sizeof(CDP_SNAP_hdr);
1026 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1027 if (pkt[0] < 0x02 || pkt[1] == 0)
1030 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1032 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1035 if (CDP_compute_csum(pkt, len) != 0)
1047 ss = (const ushort *)pkt;
1048 type = ntohs(ss[0]);
1049 tlen = ntohs(ss[1]);
1057 ss += 2; /* point ss to the data of the TLV */
1061 case CDP_DEVICE_ID_TLV:
1063 case CDP_ADDRESS_TLV:
1065 case CDP_PORT_ID_TLV:
1067 case CDP_CAPABILITIES_TLV:
1069 case CDP_VERSION_TLV:
1071 case CDP_PLATFORM_TLV:
1073 case CDP_NATIVE_VLAN_TLV:
1076 case CDP_APPLIANCE_VLAN_TLV:
1077 t = (const uchar *)ss;
1083 ss = (const ushort *)(t + 1);
1085 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1086 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1089 vlan = ntohs(*ss); /* XXX will this work; dunno */
1094 case CDP_TRIGGER_TLV:
1096 case CDP_POWER_CONSUMPTION_TLV:
1098 case CDP_SYSNAME_TLV:
1100 case CDP_SYSOBJECT_TLV:
1102 case CDP_MANAGEMENT_ADDRESS_TLV:
1107 CDPApplianceVLAN = vlan;
1108 CDPNativeVLAN = nvlan;
1114 printf("** CDP packet is too short\n");
1118 static void CDPStart(void)
1120 #if defined(CONFIG_NET_MULTI)
1121 printf ("Using %s device\n", eth_get_name());
1126 CDPNativeVLAN = htons(-1);
1127 CDPApplianceVLAN = htons(-1);
1129 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1130 NetSetHandler (CDPDummyHandler);
1134 #endif /* CFG_CMD_CDP */
1138 NetReceive(volatile uchar * inpkt, int len)
1146 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
1149 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1152 printf("packet received\n");
1157 et = (Ethernet_t *)inpkt;
1159 /* too small packet? */
1160 if (len < ETHER_HDR_SIZE)
1163 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
1164 /* keep track if packet is CDP */
1165 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1168 myvlanid = ntohs(NetOurVLAN);
1169 if (myvlanid == (ushort)-1)
1170 myvlanid = VLAN_NONE;
1171 mynvlanid = ntohs(NetOurNativeVLAN);
1172 if (mynvlanid == (ushort)-1)
1173 mynvlanid = VLAN_NONE;
1175 x = ntohs(et->et_protlen);
1178 printf("packet received\n");
1183 * Got a 802 packet. Check the other protocol field.
1185 x = ntohs(et->et_prot);
1187 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1188 len -= E802_HDR_SIZE;
1190 } else if (x != PROT_VLAN) { /* normal packet */
1191 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1192 len -= ETHER_HDR_SIZE;
1194 } else { /* VLAN packet */
1195 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1198 printf("VLAN packet received\n");
1200 /* too small packet? */
1201 if (len < VLAN_ETHER_HDR_SIZE)
1204 /* if no VLAN active */
1205 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1206 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
1212 cti = ntohs(vet->vet_tag);
1213 vlanid = cti & VLAN_IDMASK;
1214 x = ntohs(vet->vet_type);
1216 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1217 len -= VLAN_ETHER_HDR_SIZE;
1221 printf("Receive from protocol 0x%x\n", x);
1224 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
1226 CDPHandler((uchar *)ip, len);
1231 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1232 if (vlanid == VLAN_NONE)
1233 vlanid = (mynvlanid & VLAN_IDMASK);
1235 if (vlanid != (myvlanid & VLAN_IDMASK))
1243 * We have to deal with two types of ARP packets:
1244 * - REQUEST packets will be answered by sending our
1245 * IP address - if we know it.
1246 * - REPLY packates are expected only after we asked
1247 * for the TFTP server's or the gateway's ethernet
1248 * address; so if we receive such a packet, we set
1249 * the server ethernet address
1255 if (len < ARP_HDR_SIZE) {
1256 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1259 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1262 if (ntohs(arp->ar_pro) != PROT_IP) {
1265 if (arp->ar_hln != 6) {
1268 if (arp->ar_pln != 4) {
1272 if (NetOurIP == 0) {
1276 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1280 switch (ntohs(arp->ar_op)) {
1281 case ARPOP_REQUEST: /* reply with our IP address */
1283 puts ("Got ARP REQUEST, return our IP\n");
1286 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1287 arp->ar_op = htons(ARPOP_REPLY);
1288 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1289 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1290 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1291 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1292 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1295 case ARPOP_REPLY: /* arp reply */
1296 /* are we waiting for a reply */
1297 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1300 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
1301 arp->ar_data[0], arp->ar_data[1],
1302 arp->ar_data[2], arp->ar_data[3],
1303 arp->ar_data[4], arp->ar_data[5]);
1306 tmp = NetReadIP(&arp->ar_data[6]);
1308 /* matched waiting packet's address */
1309 if (tmp == NetArpWaitReplyIP) {
1313 /* save address for later use */
1314 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1316 #ifdef CONFIG_NETCONSOLE
1317 (*packetHandler)(0,0,0,0);
1319 /* modify header, and transmit it */
1320 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1321 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1323 /* no arp request pending now */
1324 NetArpWaitPacketIP = 0;
1325 NetArpWaitTxPacketSize = 0;
1326 NetArpWaitPacketMAC = NULL;
1332 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1340 puts ("Got RARP\n");
1343 if (len < ARP_HDR_SIZE) {
1344 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1348 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1349 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1350 (ntohs(arp->ar_pro) != PROT_IP) ||
1351 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1353 puts ("invalid RARP header\n");
1355 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1356 if (NetServerIP == 0)
1357 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1358 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1360 (*packetHandler)(0,0,0,0);
1368 if (len < IP_HDR_SIZE) {
1369 debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
1372 if (len < ntohs(ip->ip_len)) {
1373 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1376 len = ntohs(ip->ip_len);
1378 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1380 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1383 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
1386 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1387 puts ("checksum bad\n");
1390 tmp = NetReadIP(&ip->ip_dst);
1391 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1395 * watch for ICMP host redirects
1397 * There is no real handler code (yet). We just watch
1398 * for ICMP host redirect messages. In case anybody
1399 * sees these messages: please contact me
1400 * (wd@denx.de), or - even better - send me the
1401 * necessary fixes :-)
1403 * Note: in all cases where I have seen this so far
1404 * it was a problem with the router configuration,
1405 * for instance when a router was configured in the
1406 * BOOTP reply, but the TFTP server was on the same
1407 * subnet. So this is probably a warning that your
1408 * configuration might be wrong. But I'm not really
1409 * sure if there aren't any other situations.
1411 if (ip->ip_p == IPPROTO_ICMP) {
1412 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1414 switch (icmph->type) {
1416 if (icmph->code != ICMP_REDIR_HOST)
1418 puts (" ICMP Host Redirect to ");
1419 print_IPaddr(icmph->un.gateway);
1422 #if (CONFIG_COMMANDS & CFG_CMD_PING)
1423 case ICMP_ECHO_REPLY:
1425 * IP header OK. Pass the packet to the current handler.
1427 /* XXX point to ip packet */
1428 (*packetHandler)((uchar *)ip, 0, 0, 0);
1434 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1438 #ifdef CONFIG_UDP_CHECKSUM
1439 if (ip->udp_xsum != 0) {
1445 xsum += (ntohs(ip->udp_len));
1446 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1447 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1448 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1449 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1451 sumlen = ntohs(ip->udp_len);
1452 sumptr = (ushort *) &(ip->udp_src);
1454 while (sumlen > 1) {
1457 sumdata = *sumptr++;
1458 xsum += ntohs(sumdata);
1464 sumdata = *(unsigned char *) sumptr;
1465 sumdata = (sumdata << 8) & 0xff00;
1468 while ((xsum >> 16) != 0) {
1469 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1471 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1472 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
1478 #ifdef CONFIG_NETCONSOLE
1479 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1482 ntohs(ip->udp_len) - 8);
1485 * IP header OK. Pass the packet to the current handler.
1487 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1490 ntohs(ip->udp_len) - 8);
1496 /**********************************************************************/
1498 static int net_check_prereq (proto_t protocol)
1502 #if (CONFIG_COMMANDS & CFG_CMD_PING)
1504 if (NetPingIP == 0) {
1505 puts ("*** ERROR: ping address not given\n");
1510 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
1512 if (NetNtpServerIP == 0) {
1513 puts ("*** ERROR: NTP server address not given\n");
1518 #if (CONFIG_COMMANDS & CFG_CMD_NFS)
1523 if (NetServerIP == 0) {
1524 puts ("*** ERROR: `serverip' not set\n");
1527 #if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP))
1531 if (NetOurIP == 0) {
1532 puts ("*** ERROR: `ipaddr' not set\n");
1541 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1542 #ifdef CONFIG_NET_MULTI
1543 extern int eth_get_dev_index (void);
1544 int num = eth_get_dev_index ();
1548 puts ("*** ERROR: No ethernet found.\n");
1551 puts ("*** ERROR: `ethaddr' not set\n");
1554 printf ("*** ERROR: `eth%daddr' not set\n",
1562 puts ("*** ERROR: `ethaddr' not set\n");
1570 return (0); /* OK */
1572 /**********************************************************************/
1575 NetCksumOk(uchar * ptr, int len)
1577 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1582 NetCksum(uchar * ptr, int len)
1585 ushort *p = (ushort *)ptr;
1590 xsum = (xsum & 0xffff) + (xsum >> 16);
1591 xsum = (xsum & 0xffff) + (xsum >> 16);
1592 return (xsum & 0xffff);
1600 myvlanid = ntohs(NetOurVLAN);
1601 if (myvlanid == (ushort)-1)
1602 myvlanid = VLAN_NONE;
1604 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1608 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1610 Ethernet_t *et = (Ethernet_t *)xet;
1613 myvlanid = ntohs(NetOurVLAN);
1614 if (myvlanid == (ushort)-1)
1615 myvlanid = VLAN_NONE;
1617 memcpy (et->et_dest, addr, 6);
1618 memcpy (et->et_src, NetOurEther, 6);
1619 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1620 et->et_protlen = htons(prot);
1621 return ETHER_HDR_SIZE;
1623 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1625 vet->vet_vlan_type = htons(PROT_VLAN);
1626 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1627 vet->vet_type = htons(prot);
1628 return VLAN_ETHER_HDR_SIZE;
1633 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1635 volatile IP_t *ip = (IP_t *)xip;
1638 * If the data is an odd number of bytes, zero the
1639 * byte after the last byte so that the checksum
1643 xip[IP_HDR_SIZE + len] = 0;
1646 * Construct an IP and UDP header.
1647 * (need to set no fragment bit - XXX)
1649 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1651 ip->ip_len = htons(IP_HDR_SIZE + len);
1652 ip->ip_id = htons(NetIPID++);
1653 ip->ip_off = htons(0x4000); /* No fragmentation */
1655 ip->ip_p = 17; /* UDP */
1657 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1658 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1659 ip->udp_src = htons(sport);
1660 ip->udp_dst = htons(dport);
1661 ip->udp_len = htons(8 + len);
1663 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1666 void copy_filename (char *dst, char *src, int size)
1668 if (*src && (*src == '"')) {
1673 while ((--size > 0) && *src && (*src != '"')) {
1679 #endif /* CFG_CMD_NET */
1681 void ip_to_string (IPaddr_t x, char *s)
1684 sprintf (s, "%d.%d.%d.%d",
1685 (int) ((x >> 24) & 0xff),
1686 (int) ((x >> 16) & 0xff),
1687 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1691 IPaddr_t string_to_ip(char *s)
1700 for (addr=0, i=0; i<4; ++i) {
1701 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1703 addr |= (val & 0xFF);
1709 return (htonl(addr));
1712 void VLAN_to_string(ushort x, char *s)
1716 if (x == (ushort)-1)
1722 sprintf(s, "%d", x & VLAN_IDMASK);
1725 ushort string_to_VLAN(char *s)
1730 return htons(VLAN_NONE);
1732 if (*s < '0' || *s > '9')
1735 id = (ushort)simple_strtoul(s, NULL, 10);
1740 void print_IPaddr (IPaddr_t x)
1744 ip_to_string (x, tmp);
1749 IPaddr_t getenv_IPaddr (char *var)
1751 return (string_to_ip(getenv(var)));
1754 ushort getenv_VLAN(char *var)
1756 return (string_to_VLAN(getenv(var)));