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>
96 #if defined(CONFIG_CMD_NET)
98 DECLARE_GLOBAL_DATA_PTR;
100 #ifndef CONFIG_ARP_TIMEOUT
101 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
103 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
107 #ifndef CONFIG_NET_RETRY_COUNT
108 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
110 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
117 /** BOOTP EXTENTIONS **/
119 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
120 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
121 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
122 #if defined(CONFIG_BOOTP_DNS2)
123 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
125 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
126 char NetOurHostName[32]={0,}; /* Our hostname */
127 char NetOurRootPath[64]={0,}; /* Our bootpath */
128 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
130 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
134 /** END OF BOOTP EXTENTIONS **/
136 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
137 uchar NetOurEther[6]; /* Our ethernet address */
138 uchar NetServerEther[6] = /* Boot server enet address */
139 { 0, 0, 0, 0, 0, 0 };
140 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
141 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
142 volatile uchar *NetRxPacket; /* Current receive packet */
143 int NetRxPacketLen; /* Current rx packet length */
144 unsigned NetIPID; /* IP packet ID */
145 uchar NetBcastAddr[6] = /* Ethernet bcast address */
146 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
147 uchar NetEtherNullAddr[6] =
148 { 0, 0, 0, 0, 0, 0 };
150 void (*push_packet)(volatile void *, int len) = 0;
152 #if defined(CONFIG_CMD_CDP)
153 uchar NetCDPAddr[6] = /* Ethernet bcast address */
154 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
156 int NetState; /* Network loop state */
157 #ifdef CONFIG_NET_MULTI
158 int NetRestartWrap = 0; /* Tried all network devices */
159 static int NetRestarted = 0; /* Network loop restarted */
160 static int NetDevExists = 0; /* At least one device configured */
163 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
164 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
165 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
167 char BootFile[128]; /* Boot File name */
169 #if defined(CONFIG_CMD_PING)
170 IPaddr_t NetPingIP; /* the ip address to ping */
172 static void PingStart(void);
175 #if defined(CONFIG_CMD_CDP)
176 static void CDPStart(void);
179 #if defined(CONFIG_CMD_SNTP)
180 IPaddr_t NetNtpServerIP; /* NTP server IP address */
181 int NetTimeOffset=0; /* offset time from UTC */
184 #ifdef CONFIG_NETCONSOLE
186 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
189 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
191 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
193 static rxhand_f *packetHandler; /* Current RX packet handler */
194 static thand_f *timeHandler; /* Current timeout handler */
195 static ulong timeStart; /* Time base value */
196 static ulong timeDelta; /* Current timeout value */
197 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
199 static int net_check_prereq (proto_t protocol);
201 /**********************************************************************/
203 IPaddr_t NetArpWaitPacketIP;
204 IPaddr_t NetArpWaitReplyIP;
205 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
206 uchar *NetArpWaitTxPacket; /* THE transmit packet */
207 int NetArpWaitTxPacketSize;
208 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
209 ulong NetArpWaitTimerStart;
212 void ArpRequest (void)
219 printf ("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 env_changed_id = env_id;
300 /**********************************************************************/
302 * Main network processing loop.
306 NetLoop(proto_t protocol)
310 #ifdef CONFIG_NET_MULTI
315 /* XXX problem with bss workaround */
316 NetArpWaitPacketMAC = NULL;
317 NetArpWaitTxPacket = NULL;
318 NetArpWaitPacketIP = 0;
319 NetArpWaitReplyIP = 0;
320 NetArpWaitTxPacket = NULL;
326 * Setup packet buffers, aligned correctly.
328 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
329 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
330 for (i = 0; i < PKTBUFSRX; i++) {
331 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
335 if (!NetArpWaitTxPacket) {
336 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
337 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
338 NetArpWaitTxPacketSize = 0;
342 #ifdef CONFIG_NET_MULTI
345 if (eth_init(bd) < 0) {
351 #ifdef CONFIG_NET_MULTI
352 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
354 eth_getenv_enetaddr("ethaddr", NetOurEther);
357 NetState = NETLOOP_CONTINUE;
360 * Start the ball rolling with the given start function. From
361 * here on, this code is a state machine driven by received
362 * packets and timer events.
364 NetInitLoop(protocol);
366 switch (net_check_prereq (protocol)) {
368 /* network not configured */
372 #ifdef CONFIG_NET_MULTI
374 /* network device not configured */
376 #endif /* CONFIG_NET_MULTI */
379 #ifdef CONFIG_NET_MULTI
384 /* always use ARP to get server ethernet address */
388 #if defined(CONFIG_CMD_DHCP)
391 DhcpRequest(); /* Basically same as BOOTP */
404 #if defined(CONFIG_CMD_PING)
409 #if defined(CONFIG_CMD_NFS)
414 #if defined(CONFIG_CMD_CDP)
419 #ifdef CONFIG_NETCONSOLE
424 #if defined(CONFIG_CMD_SNTP)
433 NetBootFileXferSize = 0;
437 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
438 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
440 * Echo the inverted link state to the fault LED.
442 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
443 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
445 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
447 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
448 #endif /* CONFIG_MII, ... */
451 * Main packet reception loop. Loop receiving packets until
452 * someone sets `NetState' to a state that terminates.
456 #ifdef CONFIG_SHOW_ACTIVITY
458 extern void show_activity(int arg);
463 * Check the ethernet for a new packet. The ethernet
464 * receive routine will process it.
469 * Abort if ctrl-c was pressed.
480 * Check for a timeout, and run the timeout handler
483 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
486 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
487 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
488 defined(CONFIG_STATUS_LED) && \
489 defined(STATUS_LED_RED)
491 * Echo the inverted link state to the fault LED.
493 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
494 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
496 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
498 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
499 #endif /* CONFIG_MII, ... */
501 timeHandler = (thand_f *)0;
508 case NETLOOP_RESTART:
509 #ifdef CONFIG_NET_MULTI
514 case NETLOOP_SUCCESS:
515 if (NetBootFileXferSize > 0) {
517 printf("Bytes transferred = %ld (%lx hex)\n",
519 NetBootFileXferSize);
520 sprintf(buf, "%lX", NetBootFileXferSize);
521 setenv("filesize", buf);
523 sprintf(buf, "%lX", (unsigned long)load_addr);
524 setenv("fileaddr", buf);
527 return NetBootFileXferSize;
535 /**********************************************************************/
538 startAgainTimeout(void)
540 NetState = NETLOOP_RESTART;
544 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
546 /* Totally ignore the packet */
549 void NetStartAgain (void)
552 int noretry = 0, once = 0;
554 if ((nretry = getenv ("netretry")) != NULL) {
555 noretry = (strcmp (nretry, "no") == 0);
556 once = (strcmp (nretry, "once") == 0);
560 NetState = NETLOOP_FAIL;
563 #ifndef CONFIG_NET_MULTI
564 NetSetTimeout (10000UL, startAgainTimeout);
565 NetSetHandler (startAgainHandler);
566 #else /* !CONFIG_NET_MULTI*/
568 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
569 eth_try_another (!NetRestarted);
572 if (NetRestartWrap) {
574 if (NetDevExists && !once) {
575 NetSetTimeout (10000UL, startAgainTimeout);
576 NetSetHandler (startAgainHandler);
578 NetState = NETLOOP_FAIL;
581 NetState = NETLOOP_RESTART;
583 #endif /* CONFIG_NET_MULTI */
586 /**********************************************************************/
592 NetSetHandler(rxhand_f * f)
599 NetSetTimeout(ulong iv, thand_f * f)
602 timeHandler = (thand_f *)0;
605 timeStart = get_timer(0);
612 NetSendPacket(volatile uchar * pkt, int len)
614 (void) eth_send(pkt, len);
618 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
622 /* convert to new style broadcast */
626 /* if broadcast, make the ether address a broadcast and don't do ARP */
627 if (dest == 0xFFFFFFFF)
628 ether = NetBcastAddr;
630 /* if MAC address was not discovered yet, save the packet and do an ARP request */
631 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
634 printf("sending ARP for %08lx\n", dest);
636 NetArpWaitPacketIP = dest;
637 NetArpWaitPacketMAC = ether;
639 pkt = NetArpWaitTxPacket;
640 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
642 NetSetIP (pkt, dest, dport, sport, len);
643 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
645 /* size of the waiting packet */
646 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
648 /* and do the ARP request */
650 NetArpWaitTimerStart = get_timer(0);
652 return 1; /* waiting */
656 printf("sending UDP to %08lx/%pM\n", dest, ether);
659 pkt = (uchar *)NetTxPacket;
660 pkt += NetSetEther (pkt, ether, PROT_IP);
661 NetSetIP (pkt, dest, dport, sport, len);
662 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
664 return 0; /* transmitted */
667 #if defined(CONFIG_CMD_PING)
668 static ushort PingSeqNo;
677 /* XXX always send arp request */
679 memcpy(mac, NetEtherNullAddr, 6);
682 printf("sending ARP for %08lx\n", NetPingIP);
685 NetArpWaitPacketIP = NetPingIP;
686 NetArpWaitPacketMAC = mac;
688 pkt = NetArpWaitTxPacket;
689 pkt += NetSetEther(pkt, mac, PROT_IP);
691 ip = (volatile IP_t *)pkt;
694 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
696 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
698 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
699 ip->ip_id = htons(NetIPID++);
700 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
702 ip->ip_p = 0x01; /* ICMP */
704 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
705 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
706 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
708 s = &ip->udp_src; /* XXX ICMP starts here */
709 s[0] = htons(0x0800); /* echo-request, code */
710 s[1] = 0; /* checksum */
711 s[2] = 0; /* identifier */
712 s[3] = htons(PingSeqNo++); /* sequence number */
713 s[1] = ~NetCksum((uchar *)s, 8/2);
715 /* size of the waiting packet */
716 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
718 /* and do the ARP request */
720 NetArpWaitTimerStart = get_timer(0);
722 return 1; /* waiting */
729 NetState = NETLOOP_FAIL; /* we did not get the reply */
733 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
736 volatile IP_t *ip = (volatile IP_t *)pkt;
738 tmp = NetReadIP((void *)&ip->ip_src);
739 if (tmp != NetPingIP)
742 NetState = NETLOOP_SUCCESS;
745 static void PingStart(void)
747 #if defined(CONFIG_NET_MULTI)
748 printf ("Using %s device\n", eth_get_name());
749 #endif /* CONFIG_NET_MULTI */
750 NetSetTimeout (10000UL, PingTimeout);
751 NetSetHandler (PingHandler);
757 #if defined(CONFIG_CMD_CDP)
759 #define CDP_DEVICE_ID_TLV 0x0001
760 #define CDP_ADDRESS_TLV 0x0002
761 #define CDP_PORT_ID_TLV 0x0003
762 #define CDP_CAPABILITIES_TLV 0x0004
763 #define CDP_VERSION_TLV 0x0005
764 #define CDP_PLATFORM_TLV 0x0006
765 #define CDP_NATIVE_VLAN_TLV 0x000a
766 #define CDP_APPLIANCE_VLAN_TLV 0x000e
767 #define CDP_TRIGGER_TLV 0x000f
768 #define CDP_POWER_CONSUMPTION_TLV 0x0010
769 #define CDP_SYSNAME_TLV 0x0014
770 #define CDP_SYSOBJECT_TLV 0x0015
771 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
773 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
778 ushort CDPNativeVLAN;
779 ushort CDPApplianceVLAN;
781 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
783 static ushort CDP_compute_csum(const uchar *buff, ushort len)
792 odd = 1 & (ulong)buff;
802 if (result & 0x80000000)
803 result = (result & 0xFFFF) + (result >> 16);
807 leftover = (signed short)(*(const signed char *)buff);
808 /* CISCO SUCKS big time! (and blows too):
809 * CDP uses the IP checksum algorithm with a twist;
810 * for the last byte it *sign* extends and sums.
812 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
815 result = (result & 0xFFFF) + (result >> 16);
818 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
821 /* add up 16-bit and 17-bit words for 17+c bits */
822 result = (result & 0xffff) + (result >> 16);
823 /* add up 16-bit and 2-bit for 16+c bit */
824 result = (result & 0xffff) + (result >> 16);
826 result = (result & 0xffff) + (result >> 16);
829 csum = ~(ushort)result;
831 /* run time endian detection */
832 if (csum != htons(csum)) /* little endian */
838 int CDPSendTrigger(void)
846 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
847 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
852 et = (Ethernet_t *)pkt;
854 /* NOTE: trigger sent not on any VLAN */
856 /* form ethernet header */
857 memcpy(et->et_dest, NetCDPAddr, 6);
858 memcpy(et->et_src, NetOurEther, 6);
860 pkt += ETHER_HDR_SIZE;
863 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
864 pkt += sizeof(CDP_SNAP_hdr);
867 *pkt++ = 0x02; /* CDP version 2 */
868 *pkt++ = 180; /* TTL */
869 s = (volatile ushort *)pkt;
871 *s++ = htons(0); /* checksum (0 for later calculation) */
874 #ifdef CONFIG_CDP_DEVICE_ID
875 *s++ = htons(CDP_DEVICE_ID_TLV);
876 *s++ = htons(CONFIG_CDP_DEVICE_ID);
877 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
878 memcpy((uchar *)s, buf, 16);
882 #ifdef CONFIG_CDP_PORT_ID
883 *s++ = htons(CDP_PORT_ID_TLV);
884 memset(buf, 0, sizeof(buf));
885 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
887 if (len & 1) /* make it even */
889 *s++ = htons(len + 4);
890 memcpy((uchar *)s, buf, len);
894 #ifdef CONFIG_CDP_CAPABILITIES
895 *s++ = htons(CDP_CAPABILITIES_TLV);
897 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
901 #ifdef CONFIG_CDP_VERSION
902 *s++ = htons(CDP_VERSION_TLV);
903 memset(buf, 0, sizeof(buf));
904 strcpy(buf, CONFIG_CDP_VERSION);
906 if (len & 1) /* make it even */
908 *s++ = htons(len + 4);
909 memcpy((uchar *)s, buf, len);
913 #ifdef CONFIG_CDP_PLATFORM
914 *s++ = htons(CDP_PLATFORM_TLV);
915 memset(buf, 0, sizeof(buf));
916 strcpy(buf, CONFIG_CDP_PLATFORM);
918 if (len & 1) /* make it even */
920 *s++ = htons(len + 4);
921 memcpy((uchar *)s, buf, len);
925 #ifdef CONFIG_CDP_TRIGGER
926 *s++ = htons(CDP_TRIGGER_TLV);
928 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
932 #ifdef CONFIG_CDP_POWER_CONSUMPTION
933 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
935 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
938 /* length of ethernet packet */
939 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
940 et->et_protlen = htons(len);
942 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
943 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
948 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
958 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
963 /* if not OK try again */
967 NetState = NETLOOP_SUCCESS;
971 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
977 CDPHandler(const uchar * pkt, unsigned len)
986 if (len < sizeof(CDP_SNAP_hdr) + 4)
989 /* check for valid CDP SNAP header */
990 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
993 pkt += sizeof(CDP_SNAP_hdr);
994 len -= sizeof(CDP_SNAP_hdr);
996 /* Version of CDP protocol must be >= 2 and TTL != 0 */
997 if (pkt[0] < 0x02 || pkt[1] == 0)
1000 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1002 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1005 if (CDP_compute_csum(pkt, len) != 0)
1017 ss = (const ushort *)pkt;
1018 type = ntohs(ss[0]);
1019 tlen = ntohs(ss[1]);
1027 ss += 2; /* point ss to the data of the TLV */
1031 case CDP_DEVICE_ID_TLV:
1033 case CDP_ADDRESS_TLV:
1035 case CDP_PORT_ID_TLV:
1037 case CDP_CAPABILITIES_TLV:
1039 case CDP_VERSION_TLV:
1041 case CDP_PLATFORM_TLV:
1043 case CDP_NATIVE_VLAN_TLV:
1046 case CDP_APPLIANCE_VLAN_TLV:
1047 t = (const uchar *)ss;
1053 ss = (const ushort *)(t + 1);
1055 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1056 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1059 vlan = ntohs(*ss); /* XXX will this work; dunno */
1064 case CDP_TRIGGER_TLV:
1066 case CDP_POWER_CONSUMPTION_TLV:
1068 case CDP_SYSNAME_TLV:
1070 case CDP_SYSOBJECT_TLV:
1072 case CDP_MANAGEMENT_ADDRESS_TLV:
1077 CDPApplianceVLAN = vlan;
1078 CDPNativeVLAN = nvlan;
1084 printf("** CDP packet is too short\n");
1088 static void CDPStart(void)
1090 #if defined(CONFIG_NET_MULTI)
1091 printf ("Using %s device\n", eth_get_name());
1096 CDPNativeVLAN = htons(-1);
1097 CDPApplianceVLAN = htons(-1);
1099 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1100 NetSetHandler (CDPDummyHandler);
1108 NetReceive(volatile uchar * inpkt, int len)
1116 #if defined(CONFIG_CMD_CDP)
1119 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1122 printf("packet received\n");
1125 NetRxPacket = inpkt;
1126 NetRxPacketLen = len;
1127 et = (Ethernet_t *)inpkt;
1129 /* too small packet? */
1130 if (len < ETHER_HDR_SIZE)
1135 (*push_packet)(inpkt, len);
1140 #if defined(CONFIG_CMD_CDP)
1141 /* keep track if packet is CDP */
1142 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1145 myvlanid = ntohs(NetOurVLAN);
1146 if (myvlanid == (ushort)-1)
1147 myvlanid = VLAN_NONE;
1148 mynvlanid = ntohs(NetOurNativeVLAN);
1149 if (mynvlanid == (ushort)-1)
1150 mynvlanid = VLAN_NONE;
1152 x = ntohs(et->et_protlen);
1155 printf("packet received\n");
1160 * Got a 802 packet. Check the other protocol field.
1162 x = ntohs(et->et_prot);
1164 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1165 len -= E802_HDR_SIZE;
1167 } else if (x != PROT_VLAN) { /* normal packet */
1168 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1169 len -= ETHER_HDR_SIZE;
1171 } else { /* VLAN packet */
1172 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1175 printf("VLAN packet received\n");
1177 /* too small packet? */
1178 if (len < VLAN_ETHER_HDR_SIZE)
1181 /* if no VLAN active */
1182 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1183 #if defined(CONFIG_CMD_CDP)
1189 cti = ntohs(vet->vet_tag);
1190 vlanid = cti & VLAN_IDMASK;
1191 x = ntohs(vet->vet_type);
1193 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1194 len -= VLAN_ETHER_HDR_SIZE;
1198 printf("Receive from protocol 0x%x\n", x);
1201 #if defined(CONFIG_CMD_CDP)
1203 CDPHandler((uchar *)ip, len);
1208 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1209 if (vlanid == VLAN_NONE)
1210 vlanid = (mynvlanid & VLAN_IDMASK);
1212 if (vlanid != (myvlanid & VLAN_IDMASK))
1220 * We have to deal with two types of ARP packets:
1221 * - REQUEST packets will be answered by sending our
1222 * IP address - if we know it.
1223 * - REPLY packates are expected only after we asked
1224 * for the TFTP server's or the gateway's ethernet
1225 * address; so if we receive such a packet, we set
1226 * the server ethernet address
1232 if (len < ARP_HDR_SIZE) {
1233 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1236 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1239 if (ntohs(arp->ar_pro) != PROT_IP) {
1242 if (arp->ar_hln != 6) {
1245 if (arp->ar_pln != 4) {
1249 if (NetOurIP == 0) {
1253 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1257 switch (ntohs(arp->ar_op)) {
1258 case ARPOP_REQUEST: /* reply with our IP address */
1260 puts ("Got ARP REQUEST, return our IP\n");
1263 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1264 arp->ar_op = htons(ARPOP_REPLY);
1265 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1266 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1267 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1268 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1269 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1272 case ARPOP_REPLY: /* arp reply */
1273 /* are we waiting for a reply */
1274 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1277 printf("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1281 tmp = NetReadIP(&arp->ar_data[6]);
1283 /* matched waiting packet's address */
1284 if (tmp == NetArpWaitReplyIP) {
1288 /* save address for later use */
1289 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1291 #ifdef CONFIG_NETCONSOLE
1292 (*packetHandler)(0,0,0,0);
1294 /* modify header, and transmit it */
1295 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1296 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1298 /* no arp request pending now */
1299 NetArpWaitPacketIP = 0;
1300 NetArpWaitTxPacketSize = 0;
1301 NetArpWaitPacketMAC = NULL;
1307 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1315 puts ("Got RARP\n");
1318 if (len < ARP_HDR_SIZE) {
1319 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1323 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1324 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1325 (ntohs(arp->ar_pro) != PROT_IP) ||
1326 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1328 puts ("invalid RARP header\n");
1330 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1331 if (NetServerIP == 0)
1332 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1333 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1335 (*packetHandler)(0,0,0,0);
1343 if (len < IP_HDR_SIZE) {
1344 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1347 if (len < ntohs(ip->ip_len)) {
1348 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1351 len = ntohs(ip->ip_len);
1353 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1355 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1358 /* Can't deal with fragments */
1359 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) {
1362 /* can't deal with headers > 20 bytes */
1363 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1366 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1367 puts ("checksum bad\n");
1370 tmp = NetReadIP(&ip->ip_dst);
1371 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1372 #ifdef CONFIG_MCAST_TFTP
1373 if (Mcast_addr != tmp)
1378 * watch for ICMP host redirects
1380 * There is no real handler code (yet). We just watch
1381 * for ICMP host redirect messages. In case anybody
1382 * sees these messages: please contact me
1383 * (wd@denx.de), or - even better - send me the
1384 * necessary fixes :-)
1386 * Note: in all cases where I have seen this so far
1387 * it was a problem with the router configuration,
1388 * for instance when a router was configured in the
1389 * BOOTP reply, but the TFTP server was on the same
1390 * subnet. So this is probably a warning that your
1391 * configuration might be wrong. But I'm not really
1392 * sure if there aren't any other situations.
1394 if (ip->ip_p == IPPROTO_ICMP) {
1395 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1397 switch (icmph->type) {
1399 if (icmph->code != ICMP_REDIR_HOST)
1401 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1403 #if defined(CONFIG_CMD_PING)
1404 case ICMP_ECHO_REPLY:
1406 * IP header OK. Pass the packet to the current handler.
1408 /* XXX point to ip packet */
1409 (*packetHandler)((uchar *)ip, 0, 0, 0);
1411 case ICMP_ECHO_REQUEST:
1413 printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
1414 ETHER_HDR_SIZE + len);
1416 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1417 memcpy (&et->et_src[ 0], NetOurEther, 6);
1421 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1422 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1423 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1425 icmph->type = ICMP_ECHO_REPLY;
1426 icmph->checksum = 0;
1427 icmph->checksum = ~NetCksum((uchar *)icmph,
1428 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1429 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1435 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1439 #ifdef CONFIG_UDP_CHECKSUM
1440 if (ip->udp_xsum != 0) {
1446 xsum += (ntohs(ip->udp_len));
1447 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1448 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1449 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1450 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1452 sumlen = ntohs(ip->udp_len);
1453 sumptr = (ushort *) &(ip->udp_src);
1455 while (sumlen > 1) {
1458 sumdata = *sumptr++;
1459 xsum += ntohs(sumdata);
1465 sumdata = *(unsigned char *) sumptr;
1466 sumdata = (sumdata << 8) & 0xff00;
1469 while ((xsum >> 16) != 0) {
1470 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1472 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1473 printf(" UDP wrong checksum %08lx %08x\n",
1474 xsum, ntohs(ip->udp_xsum));
1481 #ifdef CONFIG_NETCONSOLE
1482 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1485 ntohs(ip->udp_len) - 8);
1488 * IP header OK. Pass the packet to the current handler.
1490 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1493 ntohs(ip->udp_len) - 8);
1499 /**********************************************************************/
1501 static int net_check_prereq (proto_t protocol)
1505 #if defined(CONFIG_CMD_PING)
1507 if (NetPingIP == 0) {
1508 puts ("*** ERROR: ping address not given\n");
1513 #if defined(CONFIG_CMD_SNTP)
1515 if (NetNtpServerIP == 0) {
1516 puts ("*** ERROR: NTP server address not given\n");
1521 #if defined(CONFIG_CMD_NFS)
1526 if (NetServerIP == 0) {
1527 puts ("*** ERROR: `serverip' not set\n");
1530 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1534 if (NetOurIP == 0) {
1535 puts ("*** ERROR: `ipaddr' not set\n");
1544 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1545 #ifdef CONFIG_NET_MULTI
1546 extern int eth_get_dev_index (void);
1547 int num = eth_get_dev_index ();
1551 puts ("*** ERROR: No ethernet found.\n");
1554 puts ("*** ERROR: `ethaddr' not set\n");
1557 printf ("*** ERROR: `eth%daddr' not set\n",
1565 puts ("*** ERROR: `ethaddr' not set\n");
1573 return (0); /* OK */
1575 /**********************************************************************/
1578 NetCksumOk(uchar * ptr, int len)
1580 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1585 NetCksum(uchar * ptr, int len)
1588 ushort *p = (ushort *)ptr;
1593 xsum = (xsum & 0xffff) + (xsum >> 16);
1594 xsum = (xsum & 0xffff) + (xsum >> 16);
1595 return (xsum & 0xffff);
1603 myvlanid = ntohs(NetOurVLAN);
1604 if (myvlanid == (ushort)-1)
1605 myvlanid = VLAN_NONE;
1607 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1611 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1613 Ethernet_t *et = (Ethernet_t *)xet;
1616 myvlanid = ntohs(NetOurVLAN);
1617 if (myvlanid == (ushort)-1)
1618 myvlanid = VLAN_NONE;
1620 memcpy (et->et_dest, addr, 6);
1621 memcpy (et->et_src, NetOurEther, 6);
1622 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1623 et->et_protlen = htons(prot);
1624 return ETHER_HDR_SIZE;
1626 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1628 vet->vet_vlan_type = htons(PROT_VLAN);
1629 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1630 vet->vet_type = htons(prot);
1631 return VLAN_ETHER_HDR_SIZE;
1636 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1638 IP_t *ip = (IP_t *)xip;
1641 * If the data is an odd number of bytes, zero the
1642 * byte after the last byte so that the checksum
1646 xip[IP_HDR_SIZE + len] = 0;
1649 * Construct an IP and UDP header.
1650 * (need to set no fragment bit - XXX)
1652 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1654 ip->ip_len = htons(IP_HDR_SIZE + len);
1655 ip->ip_id = htons(NetIPID++);
1656 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1658 ip->ip_p = 17; /* UDP */
1660 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1661 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1662 ip->udp_src = htons(sport);
1663 ip->udp_dst = htons(dport);
1664 ip->udp_len = htons(8 + len);
1666 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1669 void copy_filename (char *dst, char *src, int size)
1671 if (*src && (*src == '"')) {
1676 while ((--size > 0) && *src && (*src != '"')) {
1684 void ip_to_string (IPaddr_t x, char *s)
1687 sprintf (s, "%d.%d.%d.%d",
1688 (int) ((x >> 24) & 0xff),
1689 (int) ((x >> 16) & 0xff),
1690 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1694 IPaddr_t string_to_ip(char *s)
1703 for (addr=0, i=0; i<4; ++i) {
1704 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1706 addr |= (val & 0xFF);
1712 return (htonl(addr));
1715 void VLAN_to_string(ushort x, char *s)
1719 if (x == (ushort)-1)
1725 sprintf(s, "%d", x & VLAN_IDMASK);
1728 ushort string_to_VLAN(char *s)
1733 return htons(VLAN_NONE);
1735 if (*s < '0' || *s > '9')
1738 id = (ushort)simple_strtoul(s, NULL, 10);
1743 IPaddr_t getenv_IPaddr (char *var)
1745 return (string_to_ip(getenv(var)));
1748 ushort getenv_VLAN(char *var)
1750 return (string_to_VLAN(getenv(var)));