--- /dev/null
+/*
+ * Copied from Linux Monitor (LiMon) - Networking.
+ *
+ * Copyright 1994 - 2000 Neil Russell.
+ * (See License)
+ * Copyright 2000 Roland Borde
+ * Copyright 2000 Paolo Scaffardi
+ * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
+ */
+
+/*
+ * General Desription:
+ *
+ * The user interface supports commands for BOOTP, RARP, and TFTP.
+ * Also, we support ARP internally. Depending on available data,
+ * these interact as follows:
+ *
+ * BOOTP:
+ *
+ * Prerequisites: - own ethernet address
+ * We want: - own IP address
+ * - TFTP server IP address
+ * - name of bootfile
+ * Next step: ARP
+ *
+ * RARP:
+ *
+ * Prerequisites: - own ethernet address
+ * We want: - own IP address
+ * - TFTP server IP address
+ * Next step: ARP
+ *
+ * ARP:
+ *
+ * Prerequisites: - own ethernet address
+ * - own IP address
+ * - TFTP server IP address
+ * We want: - TFTP server ethernet address
+ * Next step: TFTP
+ *
+ * DHCP:
+ *
+ * Prerequisites: - own ethernet address
+ * We want: - IP, Netmask, ServerIP, Gateway IP
+ * - bootfilename, lease time
+ * Next step: - TFTP
+ *
+ * TFTP:
+ *
+ * Prerequisites: - own ethernet address
+ * - own IP address
+ * - TFTP server IP address
+ * - TFTP server ethernet address
+ * - name of bootfile (if unknown, we use a default name
+ * derived from our own IP address)
+ * We want: - load the boot file
+ * Next step: none
+ *
+ * NFS:
+ *
+ * Prerequisites: - own ethernet address
+ * - own IP address
+ * - name of bootfile (if unknown, we use a default name
+ * derived from our own IP address)
+ * We want: - load the boot file
+ * Next step: none
+ *
+ * SNTP:
+ *
+ * Prerequisites: - own ethernet address
+ * - own IP address
+ * We want: - network time
+ * Next step: none
+ */
+
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <net.h>
+#include "bootp.h"
+#include "tftp.h"
+#include "rarp.h"
+#include "nfs.h"
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#include <miiphy.h>
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+#include "sntp.h"
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define ARP_TIMEOUT 5 /* Seconds before trying ARP again */
+#ifndef CONFIG_NET_RETRY_COUNT
+# define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
+#else
+# define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
+#endif
+
+#if 0
+#define ET_DEBUG
+#endif
+
+/** BOOTP EXTENTIONS **/
+
+IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
+IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
+IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
+#if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2)
+IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
+#endif
+char NetOurNISDomain[32]={0,}; /* Our NIS domain */
+char NetOurHostName[32]={0,}; /* Our hostname */
+char NetOurRootPath[64]={0,}; /* Our bootpath */
+ushort NetBootFileSize=0; /* Our bootfile size in blocks */
+
+/** END OF BOOTP EXTENTIONS **/
+
+ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
+uchar NetOurEther[6]; /* Our ethernet address */
+uchar NetServerEther[6] = /* Boot server enet address */
+ { 0, 0, 0, 0, 0, 0 };
+IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
+IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */
+volatile uchar *NetRxPkt; /* Current receive packet */
+int NetRxPktLen; /* Current rx packet length */
+unsigned NetIPID; /* IP packet ID */
+uchar NetBcastAddr[6] = /* Ethernet bcast address */
+ { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+uchar NetEtherNullAddr[6] =
+ { 0, 0, 0, 0, 0, 0 };
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+uchar NetCDPAddr[6] = /* Ethernet bcast address */
+ { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
+#endif
+int NetState; /* Network loop state */
+#ifdef CONFIG_NET_MULTI
+int NetRestartWrap = 0; /* Tried all network devices */
+static int NetRestarted = 0; /* Network loop restarted */
+static int NetDevExists = 0; /* At least one device configured */
+#endif
+
+/* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
+ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
+ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
+
+char BootFile[128]; /* Boot File name */
+
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+IPaddr_t NetPingIP; /* the ip address to ping */
+
+static void PingStart(void);
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+static void CDPStart(void);
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+IPaddr_t NetNtpServerIP; /* NTP server IP address */
+int NetTimeOffset=0; /* offset time from UTC */
+#endif
+
+#ifdef CONFIG_NETCONSOLE
+void NcStart(void);
+int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
+#endif
+
+volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
+
+volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
+
+static rxhand_f *packetHandler; /* Current RX packet handler */
+static thand_f *timeHandler; /* Current timeout handler */
+static ulong timeStart; /* Time base value */
+static ulong timeDelta; /* Current timeout value */
+volatile uchar *NetTxPacket = 0; /* THE transmit packet */
+
+static int net_check_prereq (proto_t protocol);
+
+/**********************************************************************/
+
+IPaddr_t NetArpWaitPacketIP;
+IPaddr_t NetArpWaitReplyIP;
+uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
+uchar *NetArpWaitTxPacket; /* THE transmit packet */
+int NetArpWaitTxPacketSize;
+uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
+ulong NetArpWaitTimerStart;
+int NetArpWaitTry;
+
+void ArpRequest (void)
+{
+ int i;
+ volatile uchar *pkt;
+ ARP_t *arp;
+
+#ifdef ET_DEBUG
+ printf ("ARP broadcast %d\n", NetArpWaitTry);
+#endif
+ pkt = NetTxPacket;
+
+ pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
+
+ arp = (ARP_t *) pkt;
+
+ arp->ar_hrd = htons (ARP_ETHER);
+ arp->ar_pro = htons (PROT_IP);
+ arp->ar_hln = 6;
+ arp->ar_pln = 4;
+ arp->ar_op = htons (ARPOP_REQUEST);
+
+ memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
+ NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
+ for (i = 10; i < 16; ++i) {
+ arp->ar_data[i] = 0; /* dest ET addr = 0 */
+ }
+
+ if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
+ (NetOurIP & NetOurSubnetMask)) {
+ if (NetOurGatewayIP == 0) {
+ puts ("## Warning: gatewayip needed but not set\n");
+ NetArpWaitReplyIP = NetArpWaitPacketIP;
+ } else {
+ NetArpWaitReplyIP = NetOurGatewayIP;
+ }
+ } else {
+ NetArpWaitReplyIP = NetArpWaitPacketIP;
+ }
+
+ NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
+ (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
+}
+
+void ArpTimeoutCheck(void)
+{
+ ulong t;
+
+ if (!NetArpWaitPacketIP)
+ return;
+
+ t = get_timer(0);
+
+ /* check for arp timeout */
+ if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) {
+ NetArpWaitTry++;
+
+ if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
+ puts ("\nARP Retry count exceeded; starting again\n");
+ NetArpWaitTry = 0;
+ NetStartAgain();
+ } else {
+ NetArpWaitTimerStart = t;
+ ArpRequest();
+ }
+ }
+}
+
+/**********************************************************************/
+/*
+ * Main network processing loop.
+ */
+
+int
+NetLoop(proto_t protocol)
+{
+ bd_t *bd = gd->bd;
+
+#ifdef CONFIG_NET_MULTI
+ NetRestarted = 0;
+ NetDevExists = 0;
+#endif
+
+ /* XXX problem with bss workaround */
+ NetArpWaitPacketMAC = NULL;
+ NetArpWaitTxPacket = NULL;
+ NetArpWaitPacketIP = 0;
+ NetArpWaitReplyIP = 0;
+ NetArpWaitTxPacket = NULL;
+ NetTxPacket = NULL;
+
+ if (!NetTxPacket) {
+ int i;
+ /*
+ * Setup packet buffers, aligned correctly.
+ */
+ NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
+ NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
+ for (i = 0; i < PKTBUFSRX; i++) {
+ NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
+ }
+ }
+
+ if (!NetArpWaitTxPacket) {
+ NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
+ NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
+ NetArpWaitTxPacketSize = 0;
+ }
+
+ eth_halt();
+#ifdef CONFIG_NET_MULTI
+ eth_set_current();
+#endif
+ if (eth_init(bd) < 0) {
+ eth_halt();
+ return(-1);
+ }
+
+restart:
+#ifdef CONFIG_NET_MULTI
+ memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
+#else
+ memcpy (NetOurEther, bd->bi_enetaddr, 6);
+#endif
+
+ NetState = NETLOOP_CONTINUE;
+
+ /*
+ * Start the ball rolling with the given start function. From
+ * here on, this code is a state machine driven by received
+ * packets and timer events.
+ */
+
+ switch (protocol) {
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+ case NFS:
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+ case PING:
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+ case SNTP:
+#endif
+ case NETCONS:
+ case TFTP:
+ NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
+ NetOurGatewayIP = getenv_IPaddr ("gatewayip");
+ NetOurSubnetMask= getenv_IPaddr ("netmask");
+ NetOurVLAN = getenv_VLAN("vlan");
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+
+ switch (protocol) {
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+ case NFS:
+#endif
+ case NETCONS:
+ case TFTP:
+ NetServerIP = getenv_IPaddr ("serverip");
+ break;
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+ case PING:
+ /* nothing */
+ break;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+ case SNTP:
+ /* nothing */
+ break;
+#endif
+ default:
+ break;
+ }
+
+ break;
+ case BOOTP:
+ case RARP:
+ /*
+ * initialize our IP addr to 0 in order to accept ANY
+ * IP addr assigned to us by the BOOTP / RARP server
+ */
+ NetOurIP = 0;
+ NetServerIP = getenv_IPaddr ("serverip");
+ NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+ case CDP:
+ NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+ break;
+ default:
+ break;
+ }
+
+ switch (net_check_prereq (protocol)) {
+ case 1:
+ /* network not configured */
+ eth_halt();
+ return (-1);
+
+#ifdef CONFIG_NET_MULTI
+ case 2:
+ /* network device not configured */
+ break;
+#endif /* CONFIG_NET_MULTI */
+
+ case 0:
+#ifdef CONFIG_NET_MULTI
+ NetDevExists = 1;
+#endif
+ switch (protocol) {
+ case TFTP:
+ /* always use ARP to get server ethernet address */
+ TftpStart();
+ break;
+
+#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
+ case DHCP:
+ /* Start with a clean slate... */
+ BootpTry = 0;
+ NetOurIP = 0;
+ NetServerIP = getenv_IPaddr ("serverip");
+ DhcpRequest(); /* Basically same as BOOTP */
+ break;
+#endif /* CFG_CMD_DHCP */
+
+ case BOOTP:
+ BootpTry = 0;
+ BootpRequest ();
+ break;
+
+ case RARP:
+ RarpTry = 0;
+ RarpRequest ();
+ break;
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+ case PING:
+ PingStart();
+ break;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+ case NFS:
+ NfsStart();
+ break;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+ case CDP:
+ CDPStart();
+ break;
+#endif
+#ifdef CONFIG_NETCONSOLE
+ case NETCONS:
+ NcStart();
+ break;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+ case SNTP:
+ SntpStart();
+ break;
+#endif
+ default:
+ break;
+ }
+
+ NetBootFileXferSize = 0;
+ break;
+ }
+
+#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
+#if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
+ /*
+ * Echo the inverted link state to the fault LED.
+ */
+ if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
+ status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
+ } else {
+ status_led_set (STATUS_LED_RED, STATUS_LED_ON);
+ }
+#endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
+#endif /* CONFIG_MII, ... */
+
+ /*
+ * Main packet reception loop. Loop receiving packets until
+ * someone sets `NetState' to a state that terminates.
+ */
+ for (;;) {
+ WATCHDOG_RESET();
+#ifdef CONFIG_SHOW_ACTIVITY
+ {
+ extern void show_activity(int arg);
+ show_activity(1);
+ }
+#endif
+ /*
+ * Check the ethernet for a new packet. The ethernet
+ * receive routine will process it.
+ */
+ eth_rx();
+
+ /*
+ * Abort if ctrl-c was pressed.
+ */
+ if (ctrlc()) {
+ eth_halt();
+ puts ("\nAbort\n");
+ return (-1);
+ }
+
+ ArpTimeoutCheck();
+
+ /*
+ * Check for a timeout, and run the timeout handler
+ * if we have one.
+ */
+ if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
+ thand_f *x;
+
+#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
+# if defined(CFG_FAULT_ECHO_LINK_DOWN) && \
+ defined(CONFIG_STATUS_LED) && \
+ defined(STATUS_LED_RED)
+ /*
+ * Echo the inverted link state to the fault LED.
+ */
+ if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
+ status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
+ } else {
+ status_led_set (STATUS_LED_RED, STATUS_LED_ON);
+ }
+# endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
+#endif /* CONFIG_MII, ... */
+ x = timeHandler;
+ timeHandler = (thand_f *)0;
+ (*x)();
+ }
+
+
+ switch (NetState) {
+
+ case NETLOOP_RESTART:
+#ifdef CONFIG_NET_MULTI
+ NetRestarted = 1;
+#endif
+ goto restart;
+
+ case NETLOOP_SUCCESS:
+ if (NetBootFileXferSize > 0) {
+ char buf[10];
+ printf("Bytes transferred = %ld (%lx hex)\n",
+ NetBootFileXferSize,
+ NetBootFileXferSize);
+ sprintf(buf, "%lx", NetBootFileXferSize);
+ setenv("filesize", buf);
+
+ sprintf(buf, "%lX", (unsigned long)load_addr);
+ setenv("fileaddr", buf);
+ }
+ eth_halt();
+ return NetBootFileXferSize;
+
+ case NETLOOP_FAIL:
+ return (-1);
+ }
+ }
+}
+
+/**********************************************************************/
+
+static void
+startAgainTimeout(void)
+{
+ NetState = NETLOOP_RESTART;
+}
+
+static void
+startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
+{
+ /* Totally ignore the packet */
+}
+
+void NetStartAgain (void)
+{
+ char *nretry;
+ int noretry = 0, once = 0;
+
+ if ((nretry = getenv ("netretry")) != NULL) {
+ noretry = (strcmp (nretry, "no") == 0);
+ once = (strcmp (nretry, "once") == 0);
+ }
+ if (noretry) {
+ eth_halt ();
+ NetState = NETLOOP_FAIL;
+ return;
+ }
+#ifndef CONFIG_NET_MULTI
+ NetSetTimeout (10 * CFG_HZ, startAgainTimeout);
+ NetSetHandler (startAgainHandler);
+#else /* !CONFIG_NET_MULTI*/
+ eth_halt ();
+ eth_try_another (!NetRestarted);
+ eth_init (gd->bd);
+ if (NetRestartWrap) {
+ NetRestartWrap = 0;
+ if (NetDevExists && !once) {
+ NetSetTimeout (10 * CFG_HZ, startAgainTimeout);
+ NetSetHandler (startAgainHandler);
+ } else {
+ NetState = NETLOOP_FAIL;
+ }
+ } else {
+ NetState = NETLOOP_RESTART;
+ }
+#endif /* CONFIG_NET_MULTI */
+}
+
+/**********************************************************************/
+/*
+ * Miscelaneous bits.
+ */
+
+void
+NetSetHandler(rxhand_f * f)
+{
+ packetHandler = f;
+}
+
+
+void
+NetSetTimeout(ulong iv, thand_f * f)
+{
+ if (iv == 0) {
+ timeHandler = (thand_f *)0;
+ } else {
+ timeHandler = f;
+ timeStart = get_timer(0);
+ timeDelta = iv;
+ }
+}
+
+
+void
+NetSendPacket(volatile uchar * pkt, int len)
+{
+ (void) eth_send(pkt, len);
+}
+
+int
+NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
+{
+ uchar *pkt;
+
+ /* convert to new style broadcast */
+ if (dest == 0)
+ dest = 0xFFFFFFFF;
+
+ /* if broadcast, make the ether address a broadcast and don't do ARP */
+ if (dest == 0xFFFFFFFF)
+ ether = NetBcastAddr;
+
+ /* if MAC address was not discovered yet, save the packet and do an ARP request */
+ if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
+
+#ifdef ET_DEBUG
+ printf("sending ARP for %08lx\n", dest);
+#endif
+ NetArpWaitPacketIP = dest;
+ NetArpWaitPacketMAC = ether;
+
+ pkt = NetArpWaitTxPacket;
+ pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
+
+ NetSetIP (pkt, dest, dport, sport, len);
+ memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
+
+ /* size of the waiting packet */
+ NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
+
+ /* and do the ARP request */
+ NetArpWaitTry = 1;
+ NetArpWaitTimerStart = get_timer(0);
+ ArpRequest();
+ return 1; /* waiting */
+ }
+
+#ifdef ET_DEBUG
+ printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
+ dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
+#endif
+
+ pkt = (uchar *)NetTxPacket;
+ pkt += NetSetEther (pkt, ether, PROT_IP);
+ NetSetIP (pkt, dest, dport, sport, len);
+ (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
+
+ return 0; /* transmitted */
+}
+
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+static ushort PingSeqNo;
+
+int PingSend(void)
+{
+ static uchar mac[6];
+ volatile IP_t *ip;
+ volatile ushort *s;
+ uchar *pkt;
+
+ /* XXX always send arp request */
+
+ memcpy(mac, NetEtherNullAddr, 6);
+
+#ifdef ET_DEBUG
+ printf("sending ARP for %08lx\n", NetPingIP);
+#endif
+
+ NetArpWaitPacketIP = NetPingIP;
+ NetArpWaitPacketMAC = mac;
+
+ pkt = NetArpWaitTxPacket;
+ pkt += NetSetEther(pkt, mac, PROT_IP);
+
+ ip = (volatile IP_t *)pkt;
+
+ /*
+ * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
+ */
+ ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
+ ip->ip_tos = 0;
+ ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
+ ip->ip_id = htons(NetIPID++);
+ ip->ip_off = htons(0x4000); /* No fragmentation */
+ ip->ip_ttl = 255;
+ ip->ip_p = 0x01; /* ICMP */
+ ip->ip_sum = 0;
+ NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
+ NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
+ ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
+
+ s = &ip->udp_src; /* XXX ICMP starts here */
+ s[0] = htons(0x0800); /* echo-request, code */
+ s[1] = 0; /* checksum */
+ s[2] = 0; /* identifier */
+ s[3] = htons(PingSeqNo++); /* sequence number */
+ s[1] = ~NetCksum((uchar *)s, 8/2);
+
+ /* size of the waiting packet */
+ NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
+
+ /* and do the ARP request */
+ NetArpWaitTry = 1;
+ NetArpWaitTimerStart = get_timer(0);
+ ArpRequest();
+ return 1; /* waiting */
+}
+
+static void
+PingTimeout (void)
+{
+ eth_halt();
+ NetState = NETLOOP_FAIL; /* we did not get the reply */
+}
+
+static void
+PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
+{
+ IPaddr_t tmp;
+ volatile IP_t *ip = (volatile IP_t *)pkt;
+
+ tmp = NetReadIP((void *)&ip->ip_src);
+ if (tmp != NetPingIP)
+ return;
+
+ NetState = NETLOOP_SUCCESS;
+}
+
+static void PingStart(void)
+{
+#if defined(CONFIG_NET_MULTI)
+ printf ("Using %s device\n", eth_get_name());
+#endif /* CONFIG_NET_MULTI */
+ NetSetTimeout (10 * CFG_HZ, PingTimeout);
+ NetSetHandler (PingHandler);
+
+ PingSend();
+}
+#endif /* CFG_CMD_PING */
+
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+
+#define CDP_DEVICE_ID_TLV 0x0001
+#define CDP_ADDRESS_TLV 0x0002
+#define CDP_PORT_ID_TLV 0x0003
+#define CDP_CAPABILITIES_TLV 0x0004
+#define CDP_VERSION_TLV 0x0005
+#define CDP_PLATFORM_TLV 0x0006
+#define CDP_NATIVE_VLAN_TLV 0x000a
+#define CDP_APPLIANCE_VLAN_TLV 0x000e
+#define CDP_TRIGGER_TLV 0x000f
+#define CDP_POWER_CONSUMPTION_TLV 0x0010
+#define CDP_SYSNAME_TLV 0x0014
+#define CDP_SYSOBJECT_TLV 0x0015
+#define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
+
+#define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */
+
+static int CDPSeq;
+static int CDPOK;
+
+ushort CDPNativeVLAN;
+ushort CDPApplianceVLAN;
+
+static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
+
+static ushort CDP_compute_csum(const uchar *buff, ushort len)
+{
+ ushort csum;
+ int odd;
+ ulong result = 0;
+ ushort leftover;
+ ushort *p;
+
+ if (len > 0) {
+ odd = 1 & (ulong)buff;
+ if (odd) {
+ result = *buff << 8;
+ len--;
+ buff++;
+ }
+ while (len > 1) {
+ p = (ushort *)buff;
+ result += *p++;
+ buff = (uchar *)p;
+ if (result & 0x80000000)
+ result = (result & 0xFFFF) + (result >> 16);
+ len -= 2;
+ }
+ if (len) {
+ leftover = (signed short)(*(const signed char *)buff);
+ /* CISCO SUCKS big time! (and blows too):
+ * CDP uses the IP checksum algorithm with a twist;
+ * for the last byte it *sign* extends and sums.
+ */
+ result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
+ }
+ while (result >> 16)
+ result = (result & 0xFFFF) + (result >> 16);
+
+ if (odd)
+ result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
+ }
+
+ /* add up 16-bit and 17-bit words for 17+c bits */
+ result = (result & 0xffff) + (result >> 16);
+ /* add up 16-bit and 2-bit for 16+c bit */
+ result = (result & 0xffff) + (result >> 16);
+ /* add up carry.. */
+ result = (result & 0xffff) + (result >> 16);
+
+ /* negate */
+ csum = ~(ushort)result;
+
+ /* run time endian detection */
+ if (csum != htons(csum)) /* little endian */
+ csum = htons(csum);
+
+ return csum;
+}
+
+int CDPSendTrigger(void)
+{
+ volatile uchar *pkt;
+ volatile ushort *s;
+ volatile ushort *cp;
+ Ethernet_t *et;
+ int len;
+ ushort chksum;
+#if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
+ defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
+ char buf[32];
+#endif
+
+ pkt = NetTxPacket;
+ et = (Ethernet_t *)pkt;
+
+ /* NOTE: trigger sent not on any VLAN */
+
+ /* form ethernet header */
+ memcpy(et->et_dest, NetCDPAddr, 6);
+ memcpy(et->et_src, NetOurEther, 6);
+
+ pkt += ETHER_HDR_SIZE;
+
+ /* SNAP header */
+ memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
+ pkt += sizeof(CDP_SNAP_hdr);
+
+ /* CDP header */
+ *pkt++ = 0x02; /* CDP version 2 */
+ *pkt++ = 180; /* TTL */
+ s = (volatile ushort *)pkt;
+ cp = s;
+ *s++ = htons(0); /* checksum (0 for later calculation) */
+
+ /* CDP fields */
+#ifdef CONFIG_CDP_DEVICE_ID
+ *s++ = htons(CDP_DEVICE_ID_TLV);
+ *s++ = htons(CONFIG_CDP_DEVICE_ID);
+ memset(buf, 0, sizeof(buf));
+ sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
+ NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
+ NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
+ NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
+ memcpy((uchar *)s, buf, 16);
+ s += 16 / 2;
+#endif
+
+#ifdef CONFIG_CDP_PORT_ID
+ *s++ = htons(CDP_PORT_ID_TLV);
+ memset(buf, 0, sizeof(buf));
+ sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
+ len = strlen(buf);
+ if (len & 1) /* make it even */
+ len++;
+ *s++ = htons(len + 4);
+ memcpy((uchar *)s, buf, len);
+ s += len / 2;
+#endif
+
+#ifdef CONFIG_CDP_CAPABILITIES
+ *s++ = htons(CDP_CAPABILITIES_TLV);
+ *s++ = htons(8);
+ *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
+ s += 2;
+#endif
+
+#ifdef CONFIG_CDP_VERSION
+ *s++ = htons(CDP_VERSION_TLV);
+ memset(buf, 0, sizeof(buf));
+ strcpy(buf, CONFIG_CDP_VERSION);
+ len = strlen(buf);
+ if (len & 1) /* make it even */
+ len++;
+ *s++ = htons(len + 4);
+ memcpy((uchar *)s, buf, len);
+ s += len / 2;
+#endif
+
+#ifdef CONFIG_CDP_PLATFORM
+ *s++ = htons(CDP_PLATFORM_TLV);
+ memset(buf, 0, sizeof(buf));
+ strcpy(buf, CONFIG_CDP_PLATFORM);
+ len = strlen(buf);
+ if (len & 1) /* make it even */
+ len++;
+ *s++ = htons(len + 4);
+ memcpy((uchar *)s, buf, len);
+ s += len / 2;
+#endif
+
+#ifdef CONFIG_CDP_TRIGGER
+ *s++ = htons(CDP_TRIGGER_TLV);
+ *s++ = htons(8);
+ *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
+ s += 2;
+#endif
+
+#ifdef CONFIG_CDP_POWER_CONSUMPTION
+ *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
+ *s++ = htons(6);
+ *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
+#endif
+
+ /* length of ethernet packet */
+ len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
+ et->et_protlen = htons(len);
+
+ len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
+ chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
+ if (chksum == 0)
+ chksum = 0xFFFF;
+ *cp = htons(chksum);
+
+ (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
+ return 0;
+}
+
+static void
+CDPTimeout (void)
+{
+ CDPSeq++;
+
+ if (CDPSeq < 3) {
+ NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
+ CDPSendTrigger();
+ return;
+ }
+
+ /* if not OK try again */
+ if (!CDPOK)
+ NetStartAgain();
+ else
+ NetState = NETLOOP_SUCCESS;
+}
+
+static void
+CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
+{
+ /* nothing */
+}
+
+static void
+CDPHandler(const uchar * pkt, unsigned len)
+{
+ const uchar *t;
+ const ushort *ss;
+ ushort type, tlen;
+ uchar applid;
+ ushort vlan, nvlan;
+
+ /* minimum size? */
+ if (len < sizeof(CDP_SNAP_hdr) + 4)
+ goto pkt_short;
+
+ /* check for valid CDP SNAP header */
+ if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
+ return;
+
+ pkt += sizeof(CDP_SNAP_hdr);
+ len -= sizeof(CDP_SNAP_hdr);
+
+ /* Version of CDP protocol must be >= 2 and TTL != 0 */
+ if (pkt[0] < 0x02 || pkt[1] == 0)
+ return;
+
+ /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
+ if (pkt[0] != 0x02)
+ printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
+ pkt[0] & 0xff);
+
+ if (CDP_compute_csum(pkt, len) != 0)
+ return;
+
+ pkt += 4;
+ len -= 4;
+
+ vlan = htons(-1);
+ nvlan = htons(-1);
+ while (len > 0) {
+ if (len < 4)
+ goto pkt_short;
+
+ ss = (const ushort *)pkt;
+ type = ntohs(ss[0]);
+ tlen = ntohs(ss[1]);
+ if (tlen > len) {
+ goto pkt_short;
+ }
+
+ pkt += tlen;
+ len -= tlen;
+
+ ss += 2; /* point ss to the data of the TLV */
+ tlen -= 4;
+
+ switch (type) {
+ case CDP_DEVICE_ID_TLV:
+ break;
+ case CDP_ADDRESS_TLV:
+ break;
+ case CDP_PORT_ID_TLV:
+ break;
+ case CDP_CAPABILITIES_TLV:
+ break;
+ case CDP_VERSION_TLV:
+ break;
+ case CDP_PLATFORM_TLV:
+ break;
+ case CDP_NATIVE_VLAN_TLV:
+ nvlan = *ss;
+ break;
+ case CDP_APPLIANCE_VLAN_TLV:
+ t = (const uchar *)ss;
+ while (tlen > 0) {
+ if (tlen < 3)
+ goto pkt_short;
+
+ applid = t[0];
+ ss = (const ushort *)(t + 1);
+
+#ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
+ if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
+ vlan = *ss;
+#else
+ vlan = ntohs(*ss); /* XXX will this work; dunno */
+#endif
+ t += 3; tlen -= 3;
+ }
+ break;
+ case CDP_TRIGGER_TLV:
+ break;
+ case CDP_POWER_CONSUMPTION_TLV:
+ break;
+ case CDP_SYSNAME_TLV:
+ break;
+ case CDP_SYSOBJECT_TLV:
+ break;
+ case CDP_MANAGEMENT_ADDRESS_TLV:
+ break;
+ }
+ }
+
+ CDPApplianceVLAN = vlan;
+ CDPNativeVLAN = nvlan;
+
+ CDPOK = 1;
+ return;
+
+ pkt_short:
+ printf("** CDP packet is too short\n");
+ return;
+}
+
+static void CDPStart(void)
+{
+#if defined(CONFIG_NET_MULTI)
+ printf ("Using %s device\n", eth_get_name());
+#endif
+ CDPSeq = 0;
+ CDPOK = 0;
+
+ CDPNativeVLAN = htons(-1);
+ CDPApplianceVLAN = htons(-1);
+
+ NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
+ NetSetHandler (CDPDummyHandler);
+
+ CDPSendTrigger();
+}
+#endif /* CFG_CMD_CDP */
+
+
+void
+NetReceive(volatile uchar * inpkt, int len)
+{
+ Ethernet_t *et;
+ IP_t *ip;
+ ARP_t *arp;
+ IPaddr_t tmp;
+ int x;
+ uchar *pkt;
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+ int iscdp;
+#endif
+ ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
+
+#ifdef ET_DEBUG
+ printf("packet received\n");
+#endif
+
+ NetRxPkt = inpkt;
+ NetRxPktLen = len;
+ et = (Ethernet_t *)inpkt;
+
+ /* too small packet? */
+ if (len < ETHER_HDR_SIZE)
+ return;
+
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+ /* keep track if packet is CDP */
+ iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
+#endif
+
+ myvlanid = ntohs(NetOurVLAN);
+ if (myvlanid == (ushort)-1)
+ myvlanid = VLAN_NONE;
+ mynvlanid = ntohs(NetOurNativeVLAN);
+ if (mynvlanid == (ushort)-1)
+ mynvlanid = VLAN_NONE;
+
+ x = ntohs(et->et_protlen);
+
+#ifdef ET_DEBUG
+ printf("packet received\n");
+#endif
+
+ if (x < 1514) {
+ /*
+ * Got a 802 packet. Check the other protocol field.
+ */
+ x = ntohs(et->et_prot);
+
+ ip = (IP_t *)(inpkt + E802_HDR_SIZE);
+ len -= E802_HDR_SIZE;
+
+ } else if (x != PROT_VLAN) { /* normal packet */
+ ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
+ len -= ETHER_HDR_SIZE;
+
+ } else { /* VLAN packet */
+ VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
+
+#ifdef ET_DEBUG
+ printf("VLAN packet received\n");
+#endif
+ /* too small packet? */
+ if (len < VLAN_ETHER_HDR_SIZE)
+ return;
+
+ /* if no VLAN active */
+ if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+ && iscdp == 0
+#endif
+ )
+ return;
+
+ cti = ntohs(vet->vet_tag);
+ vlanid = cti & VLAN_IDMASK;
+ x = ntohs(vet->vet_type);
+
+ ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
+ len -= VLAN_ETHER_HDR_SIZE;
+ }
+
+#ifdef ET_DEBUG
+ printf("Receive from protocol 0x%x\n", x);
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_CDP)
+ if (iscdp) {
+ CDPHandler((uchar *)ip, len);
+ return;
+ }
+#endif
+
+ if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
+ if (vlanid == VLAN_NONE)
+ vlanid = (mynvlanid & VLAN_IDMASK);
+ /* not matched? */
+ if (vlanid != (myvlanid & VLAN_IDMASK))
+ return;
+ }
+
+ switch (x) {
+
+ case PROT_ARP:
+ /*
+ * We have to deal with two types of ARP packets:
+ * - REQUEST packets will be answered by sending our
+ * IP address - if we know it.
+ * - REPLY packates are expected only after we asked
+ * for the TFTP server's or the gateway's ethernet
+ * address; so if we receive such a packet, we set
+ * the server ethernet address
+ */
+#ifdef ET_DEBUG
+ puts ("Got ARP\n");
+#endif
+ arp = (ARP_t *)ip;
+ if (len < ARP_HDR_SIZE) {
+ printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
+ return;
+ }
+ if (ntohs(arp->ar_hrd) != ARP_ETHER) {
+ return;
+ }
+ if (ntohs(arp->ar_pro) != PROT_IP) {
+ return;
+ }
+ if (arp->ar_hln != 6) {
+ return;
+ }
+ if (arp->ar_pln != 4) {
+ return;
+ }
+
+ if (NetOurIP == 0) {
+ return;
+ }
+
+ if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
+ return;
+ }
+
+ switch (ntohs(arp->ar_op)) {
+ case ARPOP_REQUEST: /* reply with our IP address */
+#ifdef ET_DEBUG
+ puts ("Got ARP REQUEST, return our IP\n");
+#endif
+ pkt = (uchar *)et;
+ pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
+ arp->ar_op = htons(ARPOP_REPLY);
+ memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
+ NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
+ memcpy (&arp->ar_data[ 0], NetOurEther, 6);
+ NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
+ (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
+ return;
+
+ case ARPOP_REPLY: /* arp reply */
+ /* are we waiting for a reply */
+ if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
+ break;
+#ifdef ET_DEBUG
+ printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
+ arp->ar_data[0], arp->ar_data[1],
+ arp->ar_data[2], arp->ar_data[3],
+ arp->ar_data[4], arp->ar_data[5]);
+#endif
+
+ tmp = NetReadIP(&arp->ar_data[6]);
+
+ /* matched waiting packet's address */
+ if (tmp == NetArpWaitReplyIP) {
+#ifdef ET_DEBUG
+ puts ("Got it\n");
+#endif
+ /* save address for later use */
+ memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
+
+#ifdef CONFIG_NETCONSOLE
+ (*packetHandler)(0,0,0,0);
+#endif
+ /* modify header, and transmit it */
+ memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
+ (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
+
+ /* no arp request pending now */
+ NetArpWaitPacketIP = 0;
+ NetArpWaitTxPacketSize = 0;
+ NetArpWaitPacketMAC = NULL;
+
+ }
+ return;
+ default:
+#ifdef ET_DEBUG
+ printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
+#endif
+ return;
+ }
+ break;
+
+ case PROT_RARP:
+#ifdef ET_DEBUG
+ puts ("Got RARP\n");
+#endif
+ arp = (ARP_t *)ip;
+ if (len < ARP_HDR_SIZE) {
+ printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
+ return;
+ }
+
+ if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
+ (ntohs(arp->ar_hrd) != ARP_ETHER) ||
+ (ntohs(arp->ar_pro) != PROT_IP) ||
+ (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
+
+ puts ("invalid RARP header\n");
+ } else {
+ NetCopyIP(&NetOurIP, &arp->ar_data[16]);
+ if (NetServerIP == 0)
+ NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
+ memcpy (NetServerEther, &arp->ar_data[ 0], 6);
+
+ (*packetHandler)(0,0,0,0);
+ }
+ break;
+
+ case PROT_IP:
+#ifdef ET_DEBUG
+ puts ("Got IP\n");
+#endif
+ if (len < IP_HDR_SIZE) {
+ debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
+ return;
+ }
+ if (len < ntohs(ip->ip_len)) {
+ printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
+ return;
+ }
+ len = ntohs(ip->ip_len);
+#ifdef ET_DEBUG
+ printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
+#endif
+ if ((ip->ip_hl_v & 0xf0) != 0x40) {
+ return;
+ }
+ if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
+ return;
+ }
+ if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
+ puts ("checksum bad\n");
+ return;
+ }
+ tmp = NetReadIP(&ip->ip_dst);
+ if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
+ return;
+ }
+ /*
+ * watch for ICMP host redirects
+ *
+ * There is no real handler code (yet). We just watch
+ * for ICMP host redirect messages. In case anybody
+ * sees these messages: please contact me
+ * (wd@denx.de), or - even better - send me the
+ * necessary fixes :-)
+ *
+ * Note: in all cases where I have seen this so far
+ * it was a problem with the router configuration,
+ * for instance when a router was configured in the
+ * BOOTP reply, but the TFTP server was on the same
+ * subnet. So this is probably a warning that your
+ * configuration might be wrong. But I'm not really
+ * sure if there aren't any other situations.
+ */
+ if (ip->ip_p == IPPROTO_ICMP) {
+ ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
+
+ switch (icmph->type) {
+ case ICMP_REDIRECT:
+ if (icmph->code != ICMP_REDIR_HOST)
+ return;
+ puts (" ICMP Host Redirect to ");
+ print_IPaddr(icmph->un.gateway);
+ putc(' ');
+ return;
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+ case ICMP_ECHO_REPLY:
+ /*
+ * IP header OK. Pass the packet to the current handler.
+ */
+ /* XXX point to ip packet */
+ (*packetHandler)((uchar *)ip, 0, 0, 0);
+ return;
+#endif
+ default:
+ return;
+ }
+ } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
+ return;
+ }
+
+#ifdef CONFIG_UDP_CHECKSUM
+ if (ip->udp_xsum != 0) {
+ ulong xsum;
+ ushort *sumptr;
+ ushort sumlen;
+
+ xsum = ip->ip_p;
+ xsum += (ntohs(ip->udp_len));
+ xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
+ xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
+ xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
+ xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
+
+ sumlen = ntohs(ip->udp_len);
+ sumptr = (ushort *) &(ip->udp_src);
+
+ while (sumlen > 1) {
+ ushort sumdata;
+
+ sumdata = *sumptr++;
+ xsum += ntohs(sumdata);
+ sumlen -= 2;
+ }
+ if (sumlen > 0) {
+ ushort sumdata;
+
+ sumdata = *(unsigned char *) sumptr;
+ sumdata = (sumdata << 8) & 0xff00;
+ xsum += sumdata;
+ }
+ while ((xsum >> 16) != 0) {
+ xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
+ }
+ if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
+ printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
+ return;
+ }
+ }
+#endif
+
+#ifdef CONFIG_NETCONSOLE
+ nc_input_packet((uchar *)ip +IP_HDR_SIZE,
+ ntohs(ip->udp_dst),
+ ntohs(ip->udp_src),
+ ntohs(ip->udp_len) - 8);
+#endif
+ /*
+ * IP header OK. Pass the packet to the current handler.
+ */
+ (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
+ ntohs(ip->udp_dst),
+ ntohs(ip->udp_src),
+ ntohs(ip->udp_len) - 8);
+ break;
+ }
+}
+
+
+/**********************************************************************/
+
+static int net_check_prereq (proto_t protocol)
+{
+ switch (protocol) {
+ /* Fall through */
+#if (CONFIG_COMMANDS & CFG_CMD_PING)
+ case PING:
+ if (NetPingIP == 0) {
+ puts ("*** ERROR: ping address not given\n");
+ return (1);
+ }
+ goto common;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SNTP)
+ case SNTP:
+ if (NetNtpServerIP == 0) {
+ puts ("*** ERROR: NTP server address not given\n");
+ return (1);
+ }
+ goto common;
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_NFS)
+ case NFS:
+#endif
+ case NETCONS:
+ case TFTP:
+ if (NetServerIP == 0) {
+ puts ("*** ERROR: `serverip' not set\n");
+ return (1);
+ }
+#if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP))
+ common:
+#endif
+
+ if (NetOurIP == 0) {
+ puts ("*** ERROR: `ipaddr' not set\n");
+ return (1);
+ }
+ /* Fall through */
+
+ case DHCP:
+ case RARP:
+ case BOOTP:
+ case CDP:
+ if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
+#ifdef CONFIG_NET_MULTI
+ extern int eth_get_dev_index (void);
+ int num = eth_get_dev_index ();
+
+ switch (num) {
+ case -1:
+ puts ("*** ERROR: No ethernet found.\n");
+ return (1);
+ case 0:
+ puts ("*** ERROR: `ethaddr' not set\n");
+ break;
+ default:
+ printf ("*** ERROR: `eth%daddr' not set\n",
+ num);
+ break;
+ }
+
+ NetStartAgain ();
+ return (2);
+#else
+ puts ("*** ERROR: `ethaddr' not set\n");
+ return (1);
+#endif
+ }
+ /* Fall through */
+ default:
+ return (0);
+ }
+ return (0); /* OK */
+}
+/**********************************************************************/
+
+int
+NetCksumOk(uchar * ptr, int len)
+{
+ return !((NetCksum(ptr, len) + 1) & 0xfffe);
+}
+
+
+unsigned
+NetCksum(uchar * ptr, int len)
+{
+ ulong xsum;
+ ushort *p = (ushort *)ptr;
+
+ xsum = 0;
+ while (len-- > 0)
+ xsum += *p++;
+ xsum = (xsum & 0xffff) + (xsum >> 16);
+ xsum = (xsum & 0xffff) + (xsum >> 16);
+ return (xsum & 0xffff);
+}
+
+int
+NetEthHdrSize(void)
+{
+ ushort myvlanid;
+
+ myvlanid = ntohs(NetOurVLAN);
+ if (myvlanid == (ushort)-1)
+ myvlanid = VLAN_NONE;
+
+ return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
+}
+
+int
+NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
+{
+ Ethernet_t *et = (Ethernet_t *)xet;
+ ushort myvlanid;
+
+ myvlanid = ntohs(NetOurVLAN);
+ if (myvlanid == (ushort)-1)
+ myvlanid = VLAN_NONE;
+
+ memcpy (et->et_dest, addr, 6);
+ memcpy (et->et_src, NetOurEther, 6);
+ if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
+ et->et_protlen = htons(prot);
+ return ETHER_HDR_SIZE;
+ } else {
+ VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
+
+ vet->vet_vlan_type = htons(PROT_VLAN);
+ vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
+ vet->vet_type = htons(prot);
+ return VLAN_ETHER_HDR_SIZE;
+ }
+}
+
+void
+NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
+{
+ volatile IP_t *ip = (IP_t *)xip;
+
+ /*
+ * If the data is an odd number of bytes, zero the
+ * byte after the last byte so that the checksum
+ * will work.
+ */
+ if (len & 1)
+ xip[IP_HDR_SIZE + len] = 0;
+
+ /*
+ * Construct an IP and UDP header.
+ * (need to set no fragment bit - XXX)
+ */
+ ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
+ ip->ip_tos = 0;
+ ip->ip_len = htons(IP_HDR_SIZE + len);
+ ip->ip_id = htons(NetIPID++);
+ ip->ip_off = htons(0x4000); /* No fragmentation */
+ ip->ip_ttl = 255;
+ ip->ip_p = 17; /* UDP */
+ ip->ip_sum = 0;
+ NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
+ NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
+ ip->udp_src = htons(sport);
+ ip->udp_dst = htons(dport);
+ ip->udp_len = htons(8 + len);
+ ip->udp_xsum = 0;
+ ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
+}
+
+void copy_filename (char *dst, char *src, int size)
+{
+ if (*src && (*src == '"')) {
+ ++src;
+ --size;
+ }
+
+ while ((--size > 0) && *src && (*src != '"')) {
+ *dst++ = *src++;
+ }
+ *dst = '\0';
+}
+
+#endif /* CFG_CMD_NET */
+
+void ip_to_string (IPaddr_t x, char *s)
+{
+ x = ntohl (x);
+ sprintf (s, "%d.%d.%d.%d",
+ (int) ((x >> 24) & 0xff),
+ (int) ((x >> 16) & 0xff),
+ (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
+ );
+}
+
+IPaddr_t string_to_ip(char *s)
+{
+ IPaddr_t addr;
+ char *e;
+ int i;
+
+ if (s == NULL)
+ return(0);
+
+ for (addr=0, i=0; i<4; ++i) {
+ ulong val = s ? simple_strtoul(s, &e, 10) : 0;
+ addr <<= 8;
+ addr |= (val & 0xFF);
+ if (s) {
+ s = (*e) ? e+1 : e;
+ }
+ }
+
+ return (htonl(addr));
+}
+
+void VLAN_to_string(ushort x, char *s)
+{
+ x = ntohs(x);
+
+ if (x == (ushort)-1)
+ x = VLAN_NONE;
+
+ if (x == VLAN_NONE)
+ strcpy(s, "none");
+ else
+ sprintf(s, "%d", x & VLAN_IDMASK);
+}
+
+ushort string_to_VLAN(char *s)
+{
+ ushort id;
+
+ if (s == NULL)
+ return htons(VLAN_NONE);
+
+ if (*s < '0' || *s > '9')
+ id = VLAN_NONE;
+ else
+ id = (ushort)simple_strtoul(s, NULL, 10);
+
+ return htons(id);
+}
+
+void print_IPaddr (IPaddr_t x)
+{
+ char tmp[16];
+
+ ip_to_string (x, tmp);
+
+ puts (tmp);
+}
+
+IPaddr_t getenv_IPaddr (char *var)
+{
+ return (string_to_ip(getenv(var)));
+}
+
+ushort getenv_VLAN(char *var)
+{
+ return (string_to_VLAN(getenv(var)));
+}
projects / openwrt / svn-archive / archive.git / blobdiff