mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Dirk Behme](/assets/img/avatar_default.png)
There are boards out there that do not have network support in U-Boot (CONFIG_CMD_NET not set), but they do so in Linux. This makes it desirable to be able to port network configuration (like the IP address) to the Linux kernel. We should not make the passing of the IP configuration to Linux dependent on U-Boot features / settings. For this, make getenv_IPaddr() global. This fixes build error u-boot/lib_xxx/board.c:360: undefined reference to `getenv_IPaddr' on various architectures. Signed-off-by: Dirk Behme <dirk.behme@googlemail.com> Acked-by: Ben Warren <biggerbadderben@gmail.com>
1925 lines
44 KiB
C
1925 lines
44 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_CDP_VERSION)
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#include <timestamp.h>
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#endif
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#if defined(CONFIG_CMD_DNS)
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#include "dns.h"
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_ARP_TIMEOUT
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# define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
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#else
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# define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
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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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/** 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 *NetRxPacket; /* Current receive packet */
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int NetRxPacketLen; /* 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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static int NetTryCount;
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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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debug("ARP broadcast %d\n", NetArpWaitTry);
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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) {
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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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static void
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NetInitLoop(proto_t protocol)
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{
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static int env_changed_id = 0;
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bd_t *bd = gd->bd;
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int env_id = get_env_id ();
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/* update only when the environment has changed */
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if (env_changed_id != env_id) {
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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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NetServerIP = getenv_IPaddr ("serverip");
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NetOurNativeVLAN = getenv_VLAN("nvlan");
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NetOurVLAN = getenv_VLAN("vlan");
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#if defined(CONFIG_CMD_DNS)
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NetOurDNSIP = getenv_IPaddr("dnsip");
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#endif
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env_changed_id = env_id;
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}
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return;
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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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NetTryCount = 1;
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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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eth_getenv_enetaddr("ethaddr", NetOurEther);
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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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NetInitLoop(protocol);
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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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BootpTry = 0;
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NetOurIP = 0;
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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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NetOurIP = 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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NetOurIP = 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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#if defined(CONFIG_CMD_DNS)
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case DNS:
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DnsStart();
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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(CONFIG_SYS_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, CONFIG_SYS_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 /* CONFIG_SYS_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(CONFIG_SYS_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, CONFIG_SYS_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 /* CONFIG_SYS_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) {
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case NETLOOP_RESTART:
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#ifdef CONFIG_NET_MULTI
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NetRestarted = 1;
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#endif
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goto restart;
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case NETLOOP_SUCCESS:
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if (NetBootFileXferSize > 0) {
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char buf[20];
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printf("Bytes transferred = %ld (%lx hex)\n",
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NetBootFileXferSize,
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NetBootFileXferSize);
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sprintf(buf, "%lX", NetBootFileXferSize);
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setenv("filesize", buf);
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|
|
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 retry_forever = 0;
|
|
unsigned long retrycnt = 0;
|
|
|
|
nretry = getenv("netretry");
|
|
if (nretry) {
|
|
if (!strcmp(nretry, "yes"))
|
|
retry_forever = 1;
|
|
else if (!strcmp(nretry, "no"))
|
|
retrycnt = 0;
|
|
else if (!strcmp(nretry, "once"))
|
|
retrycnt = 1;
|
|
else
|
|
retrycnt = simple_strtoul(nretry, NULL, 0);
|
|
} else
|
|
retry_forever = 1;
|
|
|
|
if ((!retry_forever) && (NetTryCount >= retrycnt)) {
|
|
eth_halt();
|
|
NetState = NETLOOP_FAIL;
|
|
return;
|
|
}
|
|
|
|
NetTryCount++;
|
|
|
|
#ifndef CONFIG_NET_MULTI
|
|
NetSetTimeout (10000UL, 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) {
|
|
NetSetTimeout (10000UL, 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) {
|
|
|
|
debug("sending ARP for %08lx\n", dest);
|
|
|
|
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 */
|
|
}
|
|
|
|
debug("sending UDP to %08lx/%pM\n", dest, ether);
|
|
|
|
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);
|
|
|
|
debug("sending ARP for %08lx\n", NetPingIP);
|
|
|
|
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(IP_FLAGS_DFRAG); /* Don't fragment */
|
|
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 (10000UL, 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 250UL /* 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);
|
|
sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
|
|
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
|
|
|
|
#ifdef CONFIG_IP_DEFRAG
|
|
/*
|
|
* This function collects fragments in a single packet, according
|
|
* to the algorithm in RFC815. It returns NULL or the pointer to
|
|
* a complete packet, in static storage
|
|
*/
|
|
#ifndef CONFIG_NET_MAXDEFRAG
|
|
#define CONFIG_NET_MAXDEFRAG 16384
|
|
#endif
|
|
/*
|
|
* MAXDEFRAG, above, is chosen in the config file and is real data
|
|
* so we need to add the NFS overhead, which is more than TFTP.
|
|
* To use sizeof in the internal unnamed structures, we need a real
|
|
* instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
|
|
* The compiler doesn't complain nor allocates the actual structure
|
|
*/
|
|
static struct rpc_t rpc_specimen;
|
|
#define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
|
|
|
|
#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
|
|
|
|
/*
|
|
* this is the packet being assembled, either data or frag control.
|
|
* Fragments go by 8 bytes, so this union must be 8 bytes long
|
|
*/
|
|
struct hole {
|
|
/* first_byte is address of this structure */
|
|
u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
|
|
u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
|
|
u16 prev_hole; /* index of prev, 0 == none */
|
|
u16 unused;
|
|
};
|
|
|
|
static IP_t *__NetDefragment(IP_t *ip, int *lenp)
|
|
{
|
|
static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
|
|
static u16 first_hole, total_len;
|
|
struct hole *payload, *thisfrag, *h, *newh;
|
|
IP_t *localip = (IP_t *)pkt_buff;
|
|
uchar *indata = (uchar *)ip;
|
|
int offset8, start, len, done = 0;
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
|
|
/* payload starts after IP header, this fragment is in there */
|
|
payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
|
|
offset8 = (ip_off & IP_OFFS);
|
|
thisfrag = payload + offset8;
|
|
start = offset8 * 8;
|
|
len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
|
|
|
|
if (start + len > IP_MAXUDP) /* fragment extends too far */
|
|
return NULL;
|
|
|
|
if (!total_len || localip->ip_id != ip->ip_id) {
|
|
/* new (or different) packet, reset structs */
|
|
total_len = 0xffff;
|
|
payload[0].last_byte = ~0;
|
|
payload[0].next_hole = 0;
|
|
payload[0].prev_hole = 0;
|
|
first_hole = 0;
|
|
/* any IP header will work, copy the first we received */
|
|
memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
|
|
}
|
|
|
|
/*
|
|
* What follows is the reassembly algorithm. We use the payload
|
|
* array as a linked list of hole descriptors, as each hole starts
|
|
* at a multiple of 8 bytes. However, last byte can be whatever value,
|
|
* so it is represented as byte count, not as 8-byte blocks.
|
|
*/
|
|
|
|
h = payload + first_hole;
|
|
while (h->last_byte < start) {
|
|
if (!h->next_hole) {
|
|
/* no hole that far away */
|
|
return NULL;
|
|
}
|
|
h = payload + h->next_hole;
|
|
}
|
|
|
|
if (offset8 + (len / 8) <= h - payload) {
|
|
/* no overlap with holes (dup fragment?) */
|
|
return NULL;
|
|
}
|
|
|
|
if (!(ip_off & IP_FLAGS_MFRAG)) {
|
|
/* no more fragmentss: truncate this (last) hole */
|
|
total_len = start + len;
|
|
h->last_byte = start + len;
|
|
}
|
|
|
|
/*
|
|
* There is some overlap: fix the hole list. This code doesn't
|
|
* deal with a fragment that overlaps with two different holes
|
|
* (thus being a superset of a previously-received fragment).
|
|
*/
|
|
|
|
if ( (h >= thisfrag) && (h->last_byte <= start + len) ) {
|
|
/* complete overlap with hole: remove hole */
|
|
if (!h->prev_hole && !h->next_hole) {
|
|
/* last remaining hole */
|
|
done = 1;
|
|
} else if (!h->prev_hole) {
|
|
/* first hole */
|
|
first_hole = h->next_hole;
|
|
payload[h->next_hole].prev_hole = 0;
|
|
} else if (!h->next_hole) {
|
|
/* last hole */
|
|
payload[h->prev_hole].next_hole = 0;
|
|
} else {
|
|
/* in the middle of the list */
|
|
payload[h->next_hole].prev_hole = h->prev_hole;
|
|
payload[h->prev_hole].next_hole = h->next_hole;
|
|
}
|
|
|
|
} else if (h->last_byte <= start + len) {
|
|
/* overlaps with final part of the hole: shorten this hole */
|
|
h->last_byte = start;
|
|
|
|
} else if (h >= thisfrag) {
|
|
/* overlaps with initial part of the hole: move this hole */
|
|
newh = thisfrag + (len / 8);
|
|
*newh = *h;
|
|
h = newh;
|
|
if (h->next_hole)
|
|
payload[h->next_hole].prev_hole = (h - payload);
|
|
if (h->prev_hole)
|
|
payload[h->prev_hole].next_hole = (h - payload);
|
|
else
|
|
first_hole = (h - payload);
|
|
|
|
} else {
|
|
/* fragment sits in the middle: split the hole */
|
|
newh = thisfrag + (len / 8);
|
|
*newh = *h;
|
|
h->last_byte = start;
|
|
h->next_hole = (newh - payload);
|
|
newh->prev_hole = (h - payload);
|
|
if (newh->next_hole)
|
|
payload[newh->next_hole].prev_hole = (newh - payload);
|
|
}
|
|
|
|
/* finally copy this fragment and possibly return whole packet */
|
|
memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
|
|
if (!done)
|
|
return NULL;
|
|
|
|
localip->ip_len = htons(total_len);
|
|
*lenp = total_len + IP_HDR_SIZE_NO_UDP;
|
|
return localip;
|
|
}
|
|
|
|
static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
|
|
{
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
|
|
return ip; /* not a fragment */
|
|
return __NetDefragment(ip, lenp);
|
|
}
|
|
|
|
#else /* !CONFIG_IP_DEFRAG */
|
|
|
|
static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
|
|
{
|
|
u16 ip_off = ntohs(ip->ip_off);
|
|
if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
|
|
return ip; /* not a fragment */
|
|
return NULL;
|
|
}
|
|
#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;
|
|
|
|
debug("packet received\n");
|
|
|
|
NetRxPacket = inpkt;
|
|
NetRxPacketLen = 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);
|
|
|
|
debug("packet received\n");
|
|
|
|
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;
|
|
|
|
debug("VLAN packet received\n");
|
|
|
|
/* 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;
|
|
}
|
|
|
|
debug("Receive from protocol 0x%x\n", x);
|
|
|
|
#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
|
|
*/
|
|
debug("Got ARP\n");
|
|
|
|
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 */
|
|
debug("Got ARP REQUEST, return our IP\n");
|
|
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 CONFIG_KEEP_SERVERADDR
|
|
if (NetServerIP == NetArpWaitPacketIP) {
|
|
char buf[20];
|
|
sprintf(buf, "%pM", arp->ar_data);
|
|
setenv("serveraddr", buf);
|
|
}
|
|
#endif
|
|
|
|
debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
|
|
arp->ar_data);
|
|
|
|
tmp = NetReadIP(&arp->ar_data[6]);
|
|
|
|
/* matched waiting packet's address */
|
|
if (tmp == NetArpWaitReplyIP) {
|
|
debug("Got it\n");
|
|
/* 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:
|
|
debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case PROT_RARP:
|
|
debug("Got RARP\n");
|
|
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:
|
|
debug("Got IP\n");
|
|
/* Before we start poking the header, make sure it is there */
|
|
if (len < IP_HDR_SIZE) {
|
|
debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
|
|
return;
|
|
}
|
|
/* Check the packet length */
|
|
if (len < ntohs(ip->ip_len)) {
|
|
printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
|
|
return;
|
|
}
|
|
len = ntohs(ip->ip_len);
|
|
debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
|
|
|
|
/* Can't deal with anything except IPv4 */
|
|
if ((ip->ip_hl_v & 0xf0) != 0x40) {
|
|
return;
|
|
}
|
|
/* Can't deal with IP options (headers != 20 bytes) */
|
|
if ((ip->ip_hl_v & 0x0f) > 0x05) {
|
|
return;
|
|
}
|
|
/* Check the Checksum of the header */
|
|
if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
|
|
puts ("checksum bad\n");
|
|
return;
|
|
}
|
|
/* If it is not for us, ignore it */
|
|
tmp = NetReadIP(&ip->ip_dst);
|
|
if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
|
|
#ifdef CONFIG_MCAST_TFTP
|
|
if (Mcast_addr != tmp)
|
|
#endif
|
|
return;
|
|
}
|
|
/*
|
|
* The function returns the unchanged packet if it's not
|
|
* a fragment, and either the complete packet or NULL if
|
|
* it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
|
|
*/
|
|
if (!(ip = NetDefragment(ip, &len)))
|
|
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;
|
|
printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
|
|
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:
|
|
debug("Got ICMP ECHO REQUEST, return %d bytes \n",
|
|
ETHER_HDR_SIZE + len);
|
|
|
|
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_DNS)
|
|
case DNS:
|
|
if (NetOurDNSIP == 0) {
|
|
puts("*** ERROR: DNS 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)
|
|
{
|
|
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(IP_FLAGS_DFRAG); /* Don't fragment */
|
|
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';
|
|
}
|
|
|
|
#if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
|
|
/*
|
|
* make port a little random, but use something trivial to compute
|
|
*/
|
|
unsigned int random_port(void)
|
|
{
|
|
return 1024 + (get_timer(0) % 0x8000);;
|
|
}
|
|
#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)
|
|
);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
ushort getenv_VLAN(char *var)
|
|
{
|
|
return (string_to_VLAN(getenv(var)));
|
|
}
|