1811 lines
39 KiB
C
1811 lines
39 KiB
C
/*
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* Copied from Linux Monitor (LiMon) - Networking.
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*
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* Copyright 1994 - 2000 Neil Russell.
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* (See License)
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* Copyright 2000 Roland Borde
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* Copyright 2000 Paolo Scaffardi
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* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
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*/
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/*
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* General Desription:
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*
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* The user interface supports commands for BOOTP, RARP, and TFTP.
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* Also, we support ARP internally. Depending on available data,
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* these interact as follows:
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*
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* BOOTP:
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*
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* Prerequisites: - own ethernet address
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* We want: - own IP address
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* - TFTP server IP address
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* - name of bootfile
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* Next step: ARP
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*
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* RARP:
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*
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* Prerequisites: - own ethernet address
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* We want: - own IP address
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* - TFTP server IP address
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* Next step: ARP
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*
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* ARP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - TFTP server IP address
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* We want: - TFTP server ethernet address
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* Next step: TFTP
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*
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* DHCP:
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*
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* Prerequisites: - own ethernet address
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* We want: - IP, Netmask, ServerIP, Gateway IP
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* - bootfilename, lease time
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* Next step: - TFTP
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*
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* TFTP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - TFTP server IP address
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* - TFTP server ethernet address
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* - name of bootfile (if unknown, we use a default name
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* derived from our own IP address)
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* We want: - load the boot file
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* Next step: none
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*
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* NFS:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* - name of bootfile (if unknown, we use a default name
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* derived from our own IP address)
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* We want: - load the boot file
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* Next step: none
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*
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* SNTP:
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*
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* Prerequisites: - own ethernet address
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* - own IP address
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* We want: - network time
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* Next step: none
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <net.h>
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#include "bootp.h"
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#include "tftp.h"
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#include "rarp.h"
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#include "nfs.h"
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#ifdef CONFIG_STATUS_LED
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#include <status_led.h>
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#include <miiphy.h>
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#endif
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#if defined(CONFIG_CMD_SNTP)
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#include "sntp.h"
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#endif
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#if defined(CONFIG_CMD_NET)
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_ARP_TIMEOUT
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# define ARP_TIMEOUT 50UL /* Deciseconds before trying ARP again */
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#elif (CONFIG_ARP_TIMEOUT < 100)
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# error "Due to possible overflow CONFIG_ARP_TIMEOUT must be greater than 100ms"
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#else
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# if (CONFIG_ARP_TIMEOUT % 100)
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# warning "Supported ARP_TIMEOUT precision is 100ms"
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# endif
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# define ARP_TIMEOUT (CONFIG_ARP_TIMEOUT / 100)
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#endif
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#ifndef CONFIG_NET_RETRY_COUNT
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# define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
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#else
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# define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
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#endif
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#if 0
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#define ET_DEBUG
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#endif
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/** BOOTP EXTENTIONS **/
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IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
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IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
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IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
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#if defined(CONFIG_BOOTP_DNS2)
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IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
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#endif
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char NetOurNISDomain[32]={0,}; /* Our NIS domain */
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char NetOurHostName[32]={0,}; /* Our hostname */
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char NetOurRootPath[64]={0,}; /* Our bootpath */
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ushort NetBootFileSize=0; /* Our bootfile size in blocks */
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#ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
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IPaddr_t Mcast_addr;
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#endif
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/** END OF BOOTP EXTENTIONS **/
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ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
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uchar NetOurEther[6]; /* Our ethernet address */
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uchar NetServerEther[6] = /* Boot server enet address */
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{ 0, 0, 0, 0, 0, 0 };
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IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
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IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
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volatile uchar *NetRxPkt; /* Current receive packet */
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int NetRxPktLen; /* Current rx packet length */
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unsigned NetIPID; /* IP packet ID */
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uchar NetBcastAddr[6] = /* Ethernet bcast address */
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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uchar NetEtherNullAddr[6] =
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{ 0, 0, 0, 0, 0, 0 };
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#ifdef CONFIG_API
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void (*push_packet)(volatile void *, int len) = 0;
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#endif
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#if defined(CONFIG_CMD_CDP)
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uchar NetCDPAddr[6] = /* Ethernet bcast address */
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{ 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
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#endif
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int NetState; /* Network loop state */
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#ifdef CONFIG_NET_MULTI
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int NetRestartWrap = 0; /* Tried all network devices */
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static int NetRestarted = 0; /* Network loop restarted */
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static int NetDevExists = 0; /* At least one device configured */
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#endif
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/* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
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ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
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ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
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char BootFile[128]; /* Boot File name */
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#if defined(CONFIG_CMD_PING)
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IPaddr_t NetPingIP; /* the ip address to ping */
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static void PingStart(void);
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#endif
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#if defined(CONFIG_CMD_CDP)
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static void CDPStart(void);
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#endif
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#if defined(CONFIG_CMD_SNTP)
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IPaddr_t NetNtpServerIP; /* NTP server IP address */
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int NetTimeOffset=0; /* offset time from UTC */
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#endif
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#ifdef CONFIG_NETCONSOLE
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void NcStart(void);
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int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
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#endif
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volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
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volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
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static rxhand_f *packetHandler; /* Current RX packet handler */
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static thand_f *timeHandler; /* Current timeout handler */
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static ulong timeStart; /* Time base value */
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static ulong timeDelta; /* Current timeout value */
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volatile uchar *NetTxPacket = 0; /* THE transmit packet */
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static int net_check_prereq (proto_t protocol);
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/**********************************************************************/
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IPaddr_t NetArpWaitPacketIP;
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IPaddr_t NetArpWaitReplyIP;
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uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
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uchar *NetArpWaitTxPacket; /* THE transmit packet */
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int NetArpWaitTxPacketSize;
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uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
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ulong NetArpWaitTimerStart;
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int NetArpWaitTry;
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void ArpRequest (void)
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{
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int i;
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volatile uchar *pkt;
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ARP_t *arp;
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#ifdef ET_DEBUG
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printf ("ARP broadcast %d\n", NetArpWaitTry);
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#endif
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pkt = NetTxPacket;
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pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
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arp = (ARP_t *) pkt;
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arp->ar_hrd = htons (ARP_ETHER);
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arp->ar_pro = htons (PROT_IP);
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arp->ar_hln = 6;
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arp->ar_pln = 4;
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arp->ar_op = htons (ARPOP_REQUEST);
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memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
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NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
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for (i = 10; i < 16; ++i) {
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arp->ar_data[i] = 0; /* dest ET addr = 0 */
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}
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if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
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(NetOurIP & NetOurSubnetMask)) {
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if (NetOurGatewayIP == 0) {
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puts ("## Warning: gatewayip needed but not set\n");
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NetArpWaitReplyIP = NetArpWaitPacketIP;
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} else {
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NetArpWaitReplyIP = NetOurGatewayIP;
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}
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} else {
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NetArpWaitReplyIP = NetArpWaitPacketIP;
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}
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NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
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(void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
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}
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void ArpTimeoutCheck(void)
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{
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ulong t;
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if (!NetArpWaitPacketIP)
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return;
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t = get_timer(0);
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/* check for arp timeout */
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if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ / 10) {
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NetArpWaitTry++;
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if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
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puts ("\nARP Retry count exceeded; starting again\n");
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NetArpWaitTry = 0;
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NetStartAgain();
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} else {
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NetArpWaitTimerStart = t;
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ArpRequest();
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}
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}
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}
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/**********************************************************************/
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/*
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* Main network processing loop.
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*/
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int
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NetLoop(proto_t protocol)
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{
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bd_t *bd = gd->bd;
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#ifdef CONFIG_NET_MULTI
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NetRestarted = 0;
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NetDevExists = 0;
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#endif
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/* XXX problem with bss workaround */
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NetArpWaitPacketMAC = NULL;
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NetArpWaitTxPacket = NULL;
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NetArpWaitPacketIP = 0;
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NetArpWaitReplyIP = 0;
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NetArpWaitTxPacket = NULL;
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NetTxPacket = NULL;
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if (!NetTxPacket) {
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int i;
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/*
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* Setup packet buffers, aligned correctly.
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*/
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NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
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NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
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for (i = 0; i < PKTBUFSRX; i++) {
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NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
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}
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}
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if (!NetArpWaitTxPacket) {
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NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
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NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
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NetArpWaitTxPacketSize = 0;
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}
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eth_halt();
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#ifdef CONFIG_NET_MULTI
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eth_set_current();
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#endif
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if (eth_init(bd) < 0) {
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eth_halt();
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return(-1);
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}
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restart:
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#ifdef CONFIG_NET_MULTI
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memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
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#else
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memcpy (NetOurEther, bd->bi_enetaddr, 6);
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#endif
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NetState = NETLOOP_CONTINUE;
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/*
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* Start the ball rolling with the given start function. From
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* here on, this code is a state machine driven by received
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* packets and timer events.
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*/
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switch (protocol) {
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#if defined(CONFIG_CMD_NFS)
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case NFS:
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#endif
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#if defined(CONFIG_CMD_PING)
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case PING:
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#endif
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#if defined(CONFIG_CMD_SNTP)
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case SNTP:
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#endif
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case NETCONS:
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case TFTP:
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NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
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NetOurGatewayIP = getenv_IPaddr ("gatewayip");
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NetOurSubnetMask= getenv_IPaddr ("netmask");
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NetOurVLAN = getenv_VLAN("vlan");
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NetOurNativeVLAN = getenv_VLAN("nvlan");
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switch (protocol) {
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#if defined(CONFIG_CMD_NFS)
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case NFS:
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#endif
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case NETCONS:
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case TFTP:
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NetServerIP = getenv_IPaddr ("serverip");
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break;
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#if defined(CONFIG_CMD_PING)
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case PING:
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/* nothing */
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break;
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#endif
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#if defined(CONFIG_CMD_SNTP)
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case SNTP:
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/* nothing */
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break;
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#endif
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default:
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break;
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}
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break;
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case BOOTP:
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case RARP:
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/*
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* initialize our IP addr to 0 in order to accept ANY
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* IP addr assigned to us by the BOOTP / RARP server
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*/
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NetOurIP = 0;
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NetServerIP = getenv_IPaddr ("serverip");
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NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
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NetOurNativeVLAN = getenv_VLAN("nvlan");
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case CDP:
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NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
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NetOurNativeVLAN = getenv_VLAN("nvlan");
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break;
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default:
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break;
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}
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switch (net_check_prereq (protocol)) {
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case 1:
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/* network not configured */
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eth_halt();
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return (-1);
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#ifdef CONFIG_NET_MULTI
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case 2:
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/* network device not configured */
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break;
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#endif /* CONFIG_NET_MULTI */
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case 0:
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#ifdef CONFIG_NET_MULTI
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NetDevExists = 1;
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#endif
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switch (protocol) {
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case TFTP:
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/* always use ARP to get server ethernet address */
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TftpStart();
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break;
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#if defined(CONFIG_CMD_DHCP)
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case DHCP:
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/* Start with a clean slate... */
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BootpTry = 0;
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NetOurIP = 0;
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NetServerIP = getenv_IPaddr ("serverip");
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DhcpRequest(); /* Basically same as BOOTP */
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break;
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#endif
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case BOOTP:
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BootpTry = 0;
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BootpRequest ();
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break;
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case RARP:
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RarpTry = 0;
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RarpRequest ();
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break;
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#if defined(CONFIG_CMD_PING)
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case PING:
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PingStart();
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break;
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#endif
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#if defined(CONFIG_CMD_NFS)
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case NFS:
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NfsStart();
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break;
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#endif
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#if defined(CONFIG_CMD_CDP)
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case CDP:
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CDPStart();
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break;
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#endif
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#ifdef CONFIG_NETCONSOLE
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case NETCONS:
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NcStart();
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break;
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#endif
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#if defined(CONFIG_CMD_SNTP)
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case SNTP:
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SntpStart();
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break;
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#endif
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default:
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break;
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}
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NetBootFileXferSize = 0;
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break;
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}
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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#if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
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/*
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* Echo the inverted link state to the fault LED.
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*/
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if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
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status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
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} else {
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status_led_set (STATUS_LED_RED, STATUS_LED_ON);
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}
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#endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
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#endif /* CONFIG_MII, ... */
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/*
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* Main packet reception loop. Loop receiving packets until
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* someone sets `NetState' to a state that terminates.
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*/
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for (;;) {
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WATCHDOG_RESET();
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#ifdef CONFIG_SHOW_ACTIVITY
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{
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extern void show_activity(int arg);
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show_activity(1);
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}
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#endif
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/*
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* Check the ethernet for a new packet. The ethernet
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* receive routine will process it.
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*/
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eth_rx();
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/*
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* Abort if ctrl-c was pressed.
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*/
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if (ctrlc()) {
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eth_halt();
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puts ("\nAbort\n");
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return (-1);
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}
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ArpTimeoutCheck();
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/*
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* Check for a timeout, and run the timeout handler
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* if we have one.
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*/
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if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
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thand_f *x;
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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# if defined(CFG_FAULT_ECHO_LINK_DOWN) && \
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defined(CONFIG_STATUS_LED) && \
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defined(STATUS_LED_RED)
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/*
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* Echo the inverted link state to the fault LED.
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*/
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if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
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status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
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} else {
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status_led_set (STATUS_LED_RED, STATUS_LED_ON);
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}
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# endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
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#endif /* CONFIG_MII, ... */
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x = timeHandler;
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timeHandler = (thand_f *)0;
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(*x)();
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}
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switch (NetState) {
|
|
|
|
case NETLOOP_RESTART:
|
|
#ifdef CONFIG_NET_MULTI
|
|
NetRestarted = 1;
|
|
#endif
|
|
goto restart;
|
|
|
|
case NETLOOP_SUCCESS:
|
|
if (NetBootFileXferSize > 0) {
|
|
char buf[20];
|
|
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 (10UL * CFG_HZ, startAgainTimeout);
|
|
NetSetHandler (startAgainHandler);
|
|
#else /* !CONFIG_NET_MULTI*/
|
|
eth_halt ();
|
|
#if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
|
|
eth_try_another (!NetRestarted);
|
|
#endif
|
|
eth_init (gd->bd);
|
|
if (NetRestartWrap) {
|
|
NetRestartWrap = 0;
|
|
if (NetDevExists && !once) {
|
|
NetSetTimeout (10UL * 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 defined(CONFIG_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 (10UL * CFG_HZ, PingTimeout);
|
|
NetSetHandler (PingHandler);
|
|
|
|
PingSend();
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_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
|
|
|
|
|
|
void
|
|
NetReceive(volatile uchar * inpkt, int len)
|
|
{
|
|
Ethernet_t *et;
|
|
IP_t *ip;
|
|
ARP_t *arp;
|
|
IPaddr_t tmp;
|
|
int x;
|
|
uchar *pkt;
|
|
#if defined(CONFIG_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;
|
|
|
|
#ifdef CONFIG_API
|
|
if (push_packet) {
|
|
(*push_packet)(inpkt, len);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_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 defined(CONFIG_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 defined(CONFIG_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 < %lu\n", len, (ulong)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;
|
|
}
|
|
/* can't deal with headers > 20 bytes */
|
|
if ((ip->ip_hl_v & 0x0f) > 0x05) {
|
|
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) {
|
|
#ifdef CONFIG_MCAST_TFTP
|
|
if (Mcast_addr != tmp)
|
|
#endif
|
|
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 defined(CONFIG_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;
|
|
case ICMP_ECHO_REQUEST:
|
|
#ifdef ET_DEBUG
|
|
printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
|
|
ETHER_HDR_SIZE + len);
|
|
#endif
|
|
memcpy (&et->et_dest[0], &et->et_src[0], 6);
|
|
memcpy (&et->et_src[ 0], NetOurEther, 6);
|
|
|
|
ip->ip_sum = 0;
|
|
ip->ip_off = 0;
|
|
NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
|
|
NetCopyIP((void*)&ip->ip_src, &NetOurIP);
|
|
ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
|
|
|
|
icmph->type = ICMP_ECHO_REPLY;
|
|
icmph->checksum = 0;
|
|
icmph->checksum = ~NetCksum((uchar *)icmph,
|
|
(len - IP_HDR_SIZE_NO_UDP) >> 1);
|
|
(void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
|
|
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 %08lx %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 defined(CONFIG_CMD_PING)
|
|
case PING:
|
|
if (NetPingIP == 0) {
|
|
puts ("*** ERROR: ping address not given\n");
|
|
return (1);
|
|
}
|
|
goto common;
|
|
#endif
|
|
#if defined(CONFIG_CMD_SNTP)
|
|
case SNTP:
|
|
if (NetNtpServerIP == 0) {
|
|
puts ("*** ERROR: NTP server address not given\n");
|
|
return (1);
|
|
}
|
|
goto common;
|
|
#endif
|
|
#if defined(CONFIG_CMD_NFS)
|
|
case NFS:
|
|
#endif
|
|
case NETCONS:
|
|
case TFTP:
|
|
if (NetServerIP == 0) {
|
|
puts ("*** ERROR: `serverip' not set\n");
|
|
return (1);
|
|
}
|
|
#if defined(CONFIG_CMD_PING) || defined(CONFIG_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
|
|
|
|
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)));
|
|
}
|