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 /**********************************************************************/
202 IPaddr_t NetArpWaitPacketIP;
203 IPaddr_t NetArpWaitReplyIP;
204 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
205 uchar *NetArpWaitTxPacket; /* THE transmit packet */
206 int NetArpWaitTxPacketSize;
207 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
208 ulong NetArpWaitTimerStart;
211 void ArpRequest (void)
217 debug("ARP broadcast %d\n", NetArpWaitTry);
221 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
225 arp->ar_hrd = htons (ARP_ETHER);
226 arp->ar_pro = htons (PROT_IP);
229 arp->ar_op = htons (ARPOP_REQUEST);
231 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
232 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
233 for (i = 10; i < 16; ++i) {
234 arp->ar_data[i] = 0; /* dest ET addr = 0 */
237 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
238 (NetOurIP & NetOurSubnetMask)) {
239 if (NetOurGatewayIP == 0) {
240 puts ("## Warning: gatewayip needed but not set\n");
241 NetArpWaitReplyIP = NetArpWaitPacketIP;
243 NetArpWaitReplyIP = NetOurGatewayIP;
246 NetArpWaitReplyIP = NetArpWaitPacketIP;
249 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
250 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
253 void ArpTimeoutCheck(void)
257 if (!NetArpWaitPacketIP)
262 /* check for arp timeout */
263 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
266 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
267 puts ("\nARP Retry count exceeded; starting again\n");
271 NetArpWaitTimerStart = t;
278 NetInitLoop(proto_t protocol)
280 static int env_changed_id = 0;
282 int env_id = get_env_id ();
284 /* update only when the environment has changed */
285 if (env_changed_id != env_id) {
286 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
287 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
288 NetOurSubnetMask= getenv_IPaddr ("netmask");
289 NetServerIP = getenv_IPaddr ("serverip");
290 NetOurNativeVLAN = getenv_VLAN("nvlan");
291 NetOurVLAN = getenv_VLAN("vlan");
292 #if defined(CONFIG_CMD_DNS)
293 NetOurDNSIP = getenv_IPaddr("dnsip");
295 env_changed_id = env_id;
301 /**********************************************************************/
303 * Main network processing loop.
307 NetLoop(proto_t protocol)
311 #ifdef CONFIG_NET_MULTI
316 /* XXX problem with bss workaround */
317 NetArpWaitPacketMAC = NULL;
318 NetArpWaitTxPacket = NULL;
319 NetArpWaitPacketIP = 0;
320 NetArpWaitReplyIP = 0;
321 NetArpWaitTxPacket = NULL;
327 * Setup packet buffers, aligned correctly.
329 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
330 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
331 for (i = 0; i < PKTBUFSRX; i++) {
332 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
336 if (!NetArpWaitTxPacket) {
337 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
338 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
339 NetArpWaitTxPacketSize = 0;
343 #ifdef CONFIG_NET_MULTI
346 if (eth_init(bd) < 0) {
352 #ifdef CONFIG_NET_MULTI
353 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
355 eth_getenv_enetaddr("ethaddr", NetOurEther);
358 NetState = NETLOOP_CONTINUE;
361 * Start the ball rolling with the given start function. From
362 * here on, this code is a state machine driven by received
363 * packets and timer events.
365 NetInitLoop(protocol);
367 switch (net_check_prereq (protocol)) {
369 /* network not configured */
373 #ifdef CONFIG_NET_MULTI
375 /* network device not configured */
377 #endif /* CONFIG_NET_MULTI */
380 #ifdef CONFIG_NET_MULTI
385 /* always use ARP to get server ethernet address */
389 #if defined(CONFIG_CMD_DHCP)
393 DhcpRequest(); /* Basically same as BOOTP */
408 #if defined(CONFIG_CMD_PING)
413 #if defined(CONFIG_CMD_NFS)
418 #if defined(CONFIG_CMD_CDP)
423 #ifdef CONFIG_NETCONSOLE
428 #if defined(CONFIG_CMD_SNTP)
433 #if defined(CONFIG_CMD_DNS)
442 NetBootFileXferSize = 0;
446 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
447 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
449 * Echo the inverted link state to the fault LED.
451 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
452 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
454 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
456 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
457 #endif /* CONFIG_MII, ... */
460 * Main packet reception loop. Loop receiving packets until
461 * someone sets `NetState' to a state that terminates.
465 #ifdef CONFIG_SHOW_ACTIVITY
467 extern void show_activity(int arg);
472 * Check the ethernet for a new packet. The ethernet
473 * receive routine will process it.
478 * Abort if ctrl-c was pressed.
489 * Check for a timeout, and run the timeout handler
492 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
495 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
496 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
497 defined(CONFIG_STATUS_LED) && \
498 defined(STATUS_LED_RED)
500 * Echo the inverted link state to the fault LED.
502 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
503 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
505 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
507 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
508 #endif /* CONFIG_MII, ... */
510 timeHandler = (thand_f *)0;
517 case NETLOOP_RESTART:
518 #ifdef CONFIG_NET_MULTI
523 case NETLOOP_SUCCESS:
524 if (NetBootFileXferSize > 0) {
526 printf("Bytes transferred = %ld (%lx hex)\n",
528 NetBootFileXferSize);
529 sprintf(buf, "%lX", NetBootFileXferSize);
530 setenv("filesize", buf);
532 sprintf(buf, "%lX", (unsigned long)load_addr);
533 setenv("fileaddr", buf);
536 return NetBootFileXferSize;
544 /**********************************************************************/
547 startAgainTimeout(void)
549 NetState = NETLOOP_RESTART;
553 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
555 /* Totally ignore the packet */
558 void NetStartAgain (void)
561 int noretry = 0, once = 0;
563 if ((nretry = getenv ("netretry")) != NULL) {
564 noretry = (strcmp (nretry, "no") == 0);
565 once = (strcmp (nretry, "once") == 0);
569 NetState = NETLOOP_FAIL;
572 #ifndef CONFIG_NET_MULTI
573 NetSetTimeout (10000UL, startAgainTimeout);
574 NetSetHandler (startAgainHandler);
575 #else /* !CONFIG_NET_MULTI*/
577 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
578 eth_try_another (!NetRestarted);
581 if (NetRestartWrap) {
583 if (NetDevExists && !once) {
584 NetSetTimeout (10000UL, startAgainTimeout);
585 NetSetHandler (startAgainHandler);
587 NetState = NETLOOP_FAIL;
590 NetState = NETLOOP_RESTART;
592 #endif /* CONFIG_NET_MULTI */
595 /**********************************************************************/
601 NetSetHandler(rxhand_f * f)
608 NetSetTimeout(ulong iv, thand_f * f)
611 timeHandler = (thand_f *)0;
614 timeStart = get_timer(0);
621 NetSendPacket(volatile uchar * pkt, int len)
623 (void) eth_send(pkt, len);
627 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
631 /* convert to new style broadcast */
635 /* if broadcast, make the ether address a broadcast and don't do ARP */
636 if (dest == 0xFFFFFFFF)
637 ether = NetBcastAddr;
639 /* if MAC address was not discovered yet, save the packet and do an ARP request */
640 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
642 debug("sending ARP for %08lx\n", dest);
644 NetArpWaitPacketIP = dest;
645 NetArpWaitPacketMAC = ether;
647 pkt = NetArpWaitTxPacket;
648 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
650 NetSetIP (pkt, dest, dport, sport, len);
651 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
653 /* size of the waiting packet */
654 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
656 /* and do the ARP request */
658 NetArpWaitTimerStart = get_timer(0);
660 return 1; /* waiting */
663 debug("sending UDP to %08lx/%pM\n", dest, ether);
665 pkt = (uchar *)NetTxPacket;
666 pkt += NetSetEther (pkt, ether, PROT_IP);
667 NetSetIP (pkt, dest, dport, sport, len);
668 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
670 return 0; /* transmitted */
673 #if defined(CONFIG_CMD_PING)
674 static ushort PingSeqNo;
683 /* XXX always send arp request */
685 memcpy(mac, NetEtherNullAddr, 6);
687 debug("sending ARP for %08lx\n", NetPingIP);
689 NetArpWaitPacketIP = NetPingIP;
690 NetArpWaitPacketMAC = mac;
692 pkt = NetArpWaitTxPacket;
693 pkt += NetSetEther(pkt, mac, PROT_IP);
695 ip = (volatile IP_t *)pkt;
698 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
700 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
702 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
703 ip->ip_id = htons(NetIPID++);
704 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
706 ip->ip_p = 0x01; /* ICMP */
708 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
709 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
710 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
712 s = &ip->udp_src; /* XXX ICMP starts here */
713 s[0] = htons(0x0800); /* echo-request, code */
714 s[1] = 0; /* checksum */
715 s[2] = 0; /* identifier */
716 s[3] = htons(PingSeqNo++); /* sequence number */
717 s[1] = ~NetCksum((uchar *)s, 8/2);
719 /* size of the waiting packet */
720 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
722 /* and do the ARP request */
724 NetArpWaitTimerStart = get_timer(0);
726 return 1; /* waiting */
733 NetState = NETLOOP_FAIL; /* we did not get the reply */
737 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
740 volatile IP_t *ip = (volatile IP_t *)pkt;
742 tmp = NetReadIP((void *)&ip->ip_src);
743 if (tmp != NetPingIP)
746 NetState = NETLOOP_SUCCESS;
749 static void PingStart(void)
751 #if defined(CONFIG_NET_MULTI)
752 printf ("Using %s device\n", eth_get_name());
753 #endif /* CONFIG_NET_MULTI */
754 NetSetTimeout (10000UL, PingTimeout);
755 NetSetHandler (PingHandler);
761 #if defined(CONFIG_CMD_CDP)
763 #define CDP_DEVICE_ID_TLV 0x0001
764 #define CDP_ADDRESS_TLV 0x0002
765 #define CDP_PORT_ID_TLV 0x0003
766 #define CDP_CAPABILITIES_TLV 0x0004
767 #define CDP_VERSION_TLV 0x0005
768 #define CDP_PLATFORM_TLV 0x0006
769 #define CDP_NATIVE_VLAN_TLV 0x000a
770 #define CDP_APPLIANCE_VLAN_TLV 0x000e
771 #define CDP_TRIGGER_TLV 0x000f
772 #define CDP_POWER_CONSUMPTION_TLV 0x0010
773 #define CDP_SYSNAME_TLV 0x0014
774 #define CDP_SYSOBJECT_TLV 0x0015
775 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
777 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
782 ushort CDPNativeVLAN;
783 ushort CDPApplianceVLAN;
785 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
787 static ushort CDP_compute_csum(const uchar *buff, ushort len)
796 odd = 1 & (ulong)buff;
806 if (result & 0x80000000)
807 result = (result & 0xFFFF) + (result >> 16);
811 leftover = (signed short)(*(const signed char *)buff);
812 /* CISCO SUCKS big time! (and blows too):
813 * CDP uses the IP checksum algorithm with a twist;
814 * for the last byte it *sign* extends and sums.
816 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
819 result = (result & 0xFFFF) + (result >> 16);
822 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
825 /* add up 16-bit and 17-bit words for 17+c bits */
826 result = (result & 0xffff) + (result >> 16);
827 /* add up 16-bit and 2-bit for 16+c bit */
828 result = (result & 0xffff) + (result >> 16);
830 result = (result & 0xffff) + (result >> 16);
833 csum = ~(ushort)result;
835 /* run time endian detection */
836 if (csum != htons(csum)) /* little endian */
842 int CDPSendTrigger(void)
850 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
851 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
856 et = (Ethernet_t *)pkt;
858 /* NOTE: trigger sent not on any VLAN */
860 /* form ethernet header */
861 memcpy(et->et_dest, NetCDPAddr, 6);
862 memcpy(et->et_src, NetOurEther, 6);
864 pkt += ETHER_HDR_SIZE;
867 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
868 pkt += sizeof(CDP_SNAP_hdr);
871 *pkt++ = 0x02; /* CDP version 2 */
872 *pkt++ = 180; /* TTL */
873 s = (volatile ushort *)pkt;
875 *s++ = htons(0); /* checksum (0 for later calculation) */
878 #ifdef CONFIG_CDP_DEVICE_ID
879 *s++ = htons(CDP_DEVICE_ID_TLV);
880 *s++ = htons(CONFIG_CDP_DEVICE_ID);
881 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
882 memcpy((uchar *)s, buf, 16);
886 #ifdef CONFIG_CDP_PORT_ID
887 *s++ = htons(CDP_PORT_ID_TLV);
888 memset(buf, 0, sizeof(buf));
889 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
891 if (len & 1) /* make it even */
893 *s++ = htons(len + 4);
894 memcpy((uchar *)s, buf, len);
898 #ifdef CONFIG_CDP_CAPABILITIES
899 *s++ = htons(CDP_CAPABILITIES_TLV);
901 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
905 #ifdef CONFIG_CDP_VERSION
906 *s++ = htons(CDP_VERSION_TLV);
907 memset(buf, 0, sizeof(buf));
908 strcpy(buf, CONFIG_CDP_VERSION);
910 if (len & 1) /* make it even */
912 *s++ = htons(len + 4);
913 memcpy((uchar *)s, buf, len);
917 #ifdef CONFIG_CDP_PLATFORM
918 *s++ = htons(CDP_PLATFORM_TLV);
919 memset(buf, 0, sizeof(buf));
920 strcpy(buf, CONFIG_CDP_PLATFORM);
922 if (len & 1) /* make it even */
924 *s++ = htons(len + 4);
925 memcpy((uchar *)s, buf, len);
929 #ifdef CONFIG_CDP_TRIGGER
930 *s++ = htons(CDP_TRIGGER_TLV);
932 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
936 #ifdef CONFIG_CDP_POWER_CONSUMPTION
937 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
939 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
942 /* length of ethernet packet */
943 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
944 et->et_protlen = htons(len);
946 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
947 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
952 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
962 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
967 /* if not OK try again */
971 NetState = NETLOOP_SUCCESS;
975 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
981 CDPHandler(const uchar * pkt, unsigned len)
990 if (len < sizeof(CDP_SNAP_hdr) + 4)
993 /* check for valid CDP SNAP header */
994 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
997 pkt += sizeof(CDP_SNAP_hdr);
998 len -= sizeof(CDP_SNAP_hdr);
1000 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1001 if (pkt[0] < 0x02 || pkt[1] == 0)
1004 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1006 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1009 if (CDP_compute_csum(pkt, len) != 0)
1021 ss = (const ushort *)pkt;
1022 type = ntohs(ss[0]);
1023 tlen = ntohs(ss[1]);
1031 ss += 2; /* point ss to the data of the TLV */
1035 case CDP_DEVICE_ID_TLV:
1037 case CDP_ADDRESS_TLV:
1039 case CDP_PORT_ID_TLV:
1041 case CDP_CAPABILITIES_TLV:
1043 case CDP_VERSION_TLV:
1045 case CDP_PLATFORM_TLV:
1047 case CDP_NATIVE_VLAN_TLV:
1050 case CDP_APPLIANCE_VLAN_TLV:
1051 t = (const uchar *)ss;
1057 ss = (const ushort *)(t + 1);
1059 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1060 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1063 vlan = ntohs(*ss); /* XXX will this work; dunno */
1068 case CDP_TRIGGER_TLV:
1070 case CDP_POWER_CONSUMPTION_TLV:
1072 case CDP_SYSNAME_TLV:
1074 case CDP_SYSOBJECT_TLV:
1076 case CDP_MANAGEMENT_ADDRESS_TLV:
1081 CDPApplianceVLAN = vlan;
1082 CDPNativeVLAN = nvlan;
1088 printf("** CDP packet is too short\n");
1092 static void CDPStart(void)
1094 #if defined(CONFIG_NET_MULTI)
1095 printf ("Using %s device\n", eth_get_name());
1100 CDPNativeVLAN = htons(-1);
1101 CDPApplianceVLAN = htons(-1);
1103 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1104 NetSetHandler (CDPDummyHandler);
1112 NetReceive(volatile uchar * inpkt, int len)
1120 #if defined(CONFIG_CMD_CDP)
1123 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1125 debug("packet received\n");
1127 NetRxPacket = inpkt;
1128 NetRxPacketLen = len;
1129 et = (Ethernet_t *)inpkt;
1131 /* too small packet? */
1132 if (len < ETHER_HDR_SIZE)
1137 (*push_packet)(inpkt, len);
1142 #if defined(CONFIG_CMD_CDP)
1143 /* keep track if packet is CDP */
1144 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1147 myvlanid = ntohs(NetOurVLAN);
1148 if (myvlanid == (ushort)-1)
1149 myvlanid = VLAN_NONE;
1150 mynvlanid = ntohs(NetOurNativeVLAN);
1151 if (mynvlanid == (ushort)-1)
1152 mynvlanid = VLAN_NONE;
1154 x = ntohs(et->et_protlen);
1156 debug("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;
1174 debug("VLAN packet received\n");
1176 /* too small packet? */
1177 if (len < VLAN_ETHER_HDR_SIZE)
1180 /* if no VLAN active */
1181 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1182 #if defined(CONFIG_CMD_CDP)
1188 cti = ntohs(vet->vet_tag);
1189 vlanid = cti & VLAN_IDMASK;
1190 x = ntohs(vet->vet_type);
1192 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1193 len -= VLAN_ETHER_HDR_SIZE;
1196 debug("Receive from protocol 0x%x\n", x);
1198 #if defined(CONFIG_CMD_CDP)
1200 CDPHandler((uchar *)ip, len);
1205 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1206 if (vlanid == VLAN_NONE)
1207 vlanid = (mynvlanid & VLAN_IDMASK);
1209 if (vlanid != (myvlanid & VLAN_IDMASK))
1217 * We have to deal with two types of ARP packets:
1218 * - REQUEST packets will be answered by sending our
1219 * IP address - if we know it.
1220 * - REPLY packates are expected only after we asked
1221 * for the TFTP server's or the gateway's ethernet
1222 * address; so if we receive such a packet, we set
1223 * the server ethernet address
1228 if (len < ARP_HDR_SIZE) {
1229 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1232 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1235 if (ntohs(arp->ar_pro) != PROT_IP) {
1238 if (arp->ar_hln != 6) {
1241 if (arp->ar_pln != 4) {
1245 if (NetOurIP == 0) {
1249 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1253 switch (ntohs(arp->ar_op)) {
1254 case ARPOP_REQUEST: /* reply with our IP address */
1255 debug("Got ARP REQUEST, return our IP\n");
1257 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1258 arp->ar_op = htons(ARPOP_REPLY);
1259 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1260 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1261 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1262 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1263 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1266 case ARPOP_REPLY: /* arp reply */
1267 /* are we waiting for a reply */
1268 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1271 #ifdef CONFIG_KEEP_SERVERADDR
1272 if (NetServerIP == NetArpWaitPacketIP) {
1274 sprintf(buf, "%pM", arp->ar_data);
1275 setenv("serveraddr", buf);
1279 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1282 tmp = NetReadIP(&arp->ar_data[6]);
1284 /* matched waiting packet's address */
1285 if (tmp == NetArpWaitReplyIP) {
1287 /* save address for later use */
1288 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1290 #ifdef CONFIG_NETCONSOLE
1291 (*packetHandler)(0,0,0,0);
1293 /* modify header, and transmit it */
1294 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1295 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1297 /* no arp request pending now */
1298 NetArpWaitPacketIP = 0;
1299 NetArpWaitTxPacketSize = 0;
1300 NetArpWaitPacketMAC = NULL;
1305 debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1311 debug("Got RARP\n");
1313 if (len < ARP_HDR_SIZE) {
1314 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1318 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1319 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1320 (ntohs(arp->ar_pro) != PROT_IP) ||
1321 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1323 puts ("invalid RARP header\n");
1325 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1326 if (NetServerIP == 0)
1327 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1328 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1330 (*packetHandler)(0,0,0,0);
1336 if (len < IP_HDR_SIZE) {
1337 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1340 if (len < ntohs(ip->ip_len)) {
1341 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1344 len = ntohs(ip->ip_len);
1345 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1347 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1350 /* Can't deal with fragments */
1351 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) {
1354 /* can't deal with headers > 20 bytes */
1355 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1358 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1359 puts ("checksum bad\n");
1362 tmp = NetReadIP(&ip->ip_dst);
1363 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1364 #ifdef CONFIG_MCAST_TFTP
1365 if (Mcast_addr != tmp)
1370 * watch for ICMP host redirects
1372 * There is no real handler code (yet). We just watch
1373 * for ICMP host redirect messages. In case anybody
1374 * sees these messages: please contact me
1375 * (wd@denx.de), or - even better - send me the
1376 * necessary fixes :-)
1378 * Note: in all cases where I have seen this so far
1379 * it was a problem with the router configuration,
1380 * for instance when a router was configured in the
1381 * BOOTP reply, but the TFTP server was on the same
1382 * subnet. So this is probably a warning that your
1383 * configuration might be wrong. But I'm not really
1384 * sure if there aren't any other situations.
1386 if (ip->ip_p == IPPROTO_ICMP) {
1387 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1389 switch (icmph->type) {
1391 if (icmph->code != ICMP_REDIR_HOST)
1393 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1395 #if defined(CONFIG_CMD_PING)
1396 case ICMP_ECHO_REPLY:
1398 * IP header OK. Pass the packet to the current handler.
1400 /* XXX point to ip packet */
1401 (*packetHandler)((uchar *)ip, 0, 0, 0);
1403 case ICMP_ECHO_REQUEST:
1404 debug("Got ICMP ECHO REQUEST, return %d bytes \n",
1405 ETHER_HDR_SIZE + len);
1407 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1408 memcpy (&et->et_src[ 0], NetOurEther, 6);
1412 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1413 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1414 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1416 icmph->type = ICMP_ECHO_REPLY;
1417 icmph->checksum = 0;
1418 icmph->checksum = ~NetCksum((uchar *)icmph,
1419 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1420 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1426 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1430 #ifdef CONFIG_UDP_CHECKSUM
1431 if (ip->udp_xsum != 0) {
1437 xsum += (ntohs(ip->udp_len));
1438 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1439 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1440 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1441 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1443 sumlen = ntohs(ip->udp_len);
1444 sumptr = (ushort *) &(ip->udp_src);
1446 while (sumlen > 1) {
1449 sumdata = *sumptr++;
1450 xsum += ntohs(sumdata);
1456 sumdata = *(unsigned char *) sumptr;
1457 sumdata = (sumdata << 8) & 0xff00;
1460 while ((xsum >> 16) != 0) {
1461 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1463 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1464 printf(" UDP wrong checksum %08lx %08x\n",
1465 xsum, ntohs(ip->udp_xsum));
1472 #ifdef CONFIG_NETCONSOLE
1473 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1476 ntohs(ip->udp_len) - 8);
1479 * IP header OK. Pass the packet to the current handler.
1481 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1484 ntohs(ip->udp_len) - 8);
1490 /**********************************************************************/
1492 static int net_check_prereq (proto_t protocol)
1496 #if defined(CONFIG_CMD_PING)
1498 if (NetPingIP == 0) {
1499 puts ("*** ERROR: ping address not given\n");
1504 #if defined(CONFIG_CMD_SNTP)
1506 if (NetNtpServerIP == 0) {
1507 puts ("*** ERROR: NTP server address not given\n");
1512 #if defined(CONFIG_CMD_DNS)
1514 if (NetOurDNSIP == 0) {
1515 puts("*** ERROR: DNS server address not given\n");
1520 #if defined(CONFIG_CMD_NFS)
1525 if (NetServerIP == 0) {
1526 puts ("*** ERROR: `serverip' not set\n");
1529 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1533 if (NetOurIP == 0) {
1534 puts ("*** ERROR: `ipaddr' not set\n");
1543 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1544 #ifdef CONFIG_NET_MULTI
1545 extern int eth_get_dev_index (void);
1546 int num = eth_get_dev_index ();
1550 puts ("*** ERROR: No ethernet found.\n");
1553 puts ("*** ERROR: `ethaddr' not set\n");
1556 printf ("*** ERROR: `eth%daddr' not set\n",
1564 puts ("*** ERROR: `ethaddr' not set\n");
1572 return (0); /* OK */
1574 /**********************************************************************/
1577 NetCksumOk(uchar * ptr, int len)
1579 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1584 NetCksum(uchar * ptr, int len)
1587 ushort *p = (ushort *)ptr;
1592 xsum = (xsum & 0xffff) + (xsum >> 16);
1593 xsum = (xsum & 0xffff) + (xsum >> 16);
1594 return (xsum & 0xffff);
1602 myvlanid = ntohs(NetOurVLAN);
1603 if (myvlanid == (ushort)-1)
1604 myvlanid = VLAN_NONE;
1606 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1610 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1612 Ethernet_t *et = (Ethernet_t *)xet;
1615 myvlanid = ntohs(NetOurVLAN);
1616 if (myvlanid == (ushort)-1)
1617 myvlanid = VLAN_NONE;
1619 memcpy (et->et_dest, addr, 6);
1620 memcpy (et->et_src, NetOurEther, 6);
1621 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1622 et->et_protlen = htons(prot);
1623 return ETHER_HDR_SIZE;
1625 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1627 vet->vet_vlan_type = htons(PROT_VLAN);
1628 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1629 vet->vet_type = htons(prot);
1630 return VLAN_ETHER_HDR_SIZE;
1635 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1637 IP_t *ip = (IP_t *)xip;
1640 * If the data is an odd number of bytes, zero the
1641 * byte after the last byte so that the checksum
1645 xip[IP_HDR_SIZE + len] = 0;
1648 * Construct an IP and UDP header.
1649 * (need to set no fragment bit - XXX)
1651 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1653 ip->ip_len = htons(IP_HDR_SIZE + len);
1654 ip->ip_id = htons(NetIPID++);
1655 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1657 ip->ip_p = 17; /* UDP */
1659 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1660 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1661 ip->udp_src = htons(sport);
1662 ip->udp_dst = htons(dport);
1663 ip->udp_len = htons(8 + len);
1665 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1668 void copy_filename (char *dst, char *src, int size)
1670 if (*src && (*src == '"')) {
1675 while ((--size > 0) && *src && (*src != '"')) {
1683 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1685 * make port a little random, but use something trivial to compute
1687 unsigned int random_port(void)
1689 return 1024 + (get_timer(0) % 0x8000);;
1693 void ip_to_string (IPaddr_t x, char *s)
1696 sprintf (s, "%d.%d.%d.%d",
1697 (int) ((x >> 24) & 0xff),
1698 (int) ((x >> 16) & 0xff),
1699 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1703 IPaddr_t string_to_ip(char *s)
1712 for (addr=0, i=0; i<4; ++i) {
1713 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1715 addr |= (val & 0xFF);
1721 return (htonl(addr));
1724 void VLAN_to_string(ushort x, char *s)
1728 if (x == (ushort)-1)
1734 sprintf(s, "%d", x & VLAN_IDMASK);
1737 ushort string_to_VLAN(char *s)
1742 return htons(VLAN_NONE);
1744 if (*s < '0' || *s > '9')
1747 id = (ushort)simple_strtoul(s, NULL, 10);
1752 IPaddr_t getenv_IPaddr (char *var)
1754 return (string_to_ip(getenv(var)));
1757 ushort getenv_VLAN(char *var)
1759 return (string_to_VLAN(getenv(var)));