1000 lines
22 KiB
C
1000 lines
22 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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*/
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#include <common.h>
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#include <clock.h>
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#include <watchdog.h>
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#include <command.h>
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#include <environment.h>
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#include <param.h>
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#include <net.h>
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#include <driver.h>
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#include <errno.h>
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#include <linux/ctype.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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#define ARP_TIMEOUT (5 * SECOND) /* Seconds before trying ARP again */
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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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#ifdef 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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/** 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; /* Our IP addr (0 = unknown) */
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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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int NetState; /* Network loop state */
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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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uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
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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 uint64_t timeStart; /* Time base value */
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static uint64_t timeDelta; /* Current timeout value */
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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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uint64_t NetArpWaitTimerStart;
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void ArpRequest (void)
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{
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int i;
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uchar *pkt;
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ARP_t *arp;
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#ifdef ET_DEBUG
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printf ("ARP broadcast\n");
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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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static void ArpTimeoutCheck(void)
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{
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if (!NetArpWaitPacketIP)
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return;
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/* check for arp timeout */
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if (is_timeout(NetArpWaitTimerStart, ARP_TIMEOUT)) {
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NetArpWaitTimerStart = get_time_ns();
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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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* Main network processing loop.
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*/
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int NetLoopInit(proto_t protocol)
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{
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struct eth_device *eth_current = eth_get_current();
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IPaddr_t ip;
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int ret;
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int i;
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if (!eth_current) {
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printf("Current ethernet device not set!\n");
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return -1;
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}
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ip = dev_get_param_ip(ð_current->dev, "ipaddr");
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NetCopyIP(&NetOurIP, &ip);
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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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/*
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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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NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
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NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
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NetArpWaitTxPacketSize = 0;
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if (eth_open() < 0)
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return -1;
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string_to_ethaddr(dev_get_param(ð_get_current()->dev, "ethaddr"),
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NetOurEther);
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NetState = NETLOOP_CONTINUE;
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NetOurGatewayIP = dev_get_param_ip(ð_current->dev, "gateway");
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NetOurSubnetMask = dev_get_param_ip(ð_current->dev, "netmask");
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NetOurVLAN = getenv_VLAN("vlan");
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NetOurNativeVLAN = getenv_VLAN("nvlan");
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NetServerIP = dev_get_param_ip(ð_current->dev, "serverip");
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ret = net_check_prereq(protocol);
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if (ret)
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eth_halt();
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return ret;
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}
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int NetLoop(void)
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{
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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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NetBootFileXferSize = 0;
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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 && is_timeout(timeStart, timeDelta)) {
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thand_f *x;
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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_SUCCESS:
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if (NetBootFileXferSize > 0) {
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char buf[10];
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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, "0x%lx", NetBootFileXferSize);
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setenv("filesize", buf);
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}
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eth_halt();
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return NetBootFileXferSize;
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case NETLOOP_FAIL:
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eth_halt();
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return -1;
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}
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}
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}
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/**********************************************************************/
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/*
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* Miscelaneous bits.
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*/
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void
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NetSetHandler(rxhand_f * f)
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{
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packetHandler = f;
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}
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void
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NetSetTimeout(uint64_t iv, thand_f * f)
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{
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if (iv == 0) {
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timeHandler = (thand_f *)0;
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} else {
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timeHandler = f;
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timeStart = get_time_ns();
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timeDelta = iv;
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}
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}
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void
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NetSendPacket(uchar * pkt, int len)
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{
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(void) eth_send(pkt, len);
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}
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int
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NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
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{
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uchar *pkt;
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/* convert to new style broadcast */
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if (dest == 0)
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dest = 0xFFFFFFFF;
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/* if broadcast, make the ether address a broadcast and don't do ARP */
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if (dest == 0xFFFFFFFF)
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ether = NetBcastAddr;
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/* if MAC address was not discovered yet, save the packet and do an ARP request */
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if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
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#ifdef ET_DEBUG
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printf("sending ARP for %08lx\n", dest);
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#endif
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NetArpWaitPacketIP = dest;
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NetArpWaitPacketMAC = ether;
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pkt = NetArpWaitTxPacket;
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pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
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NetSetIP (pkt, dest, dport, sport, len);
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memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
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/* size of the waiting packet */
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NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
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/* and do the ARP request */
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NetArpWaitTimerStart = get_time_ns();
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ArpRequest();
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return 1; /* waiting */
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}
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#ifdef ET_DEBUG
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printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
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dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
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#endif
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pkt = (uchar *)NetTxPacket;
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pkt += NetSetEther (pkt, ether, PROT_IP);
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NetSetIP (pkt, dest, dport, sport, len);
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(void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
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return 0; /* transmitted */
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}
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void
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NetReceive(uchar * inpkt, int len)
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{
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Ethernet_t *et;
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IP_t *ip;
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ARP_t *arp;
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IPaddr_t tmp;
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int x;
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uchar *pkt;
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ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
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#ifdef ET_DEBUG
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printf("packet received\n");
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#endif
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NetRxPkt = inpkt;
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NetRxPktLen = len;
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et = (Ethernet_t *)inpkt;
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/* too small packet? */
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if (len < ETHER_HDR_SIZE)
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return;
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myvlanid = ntohs(NetOurVLAN);
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if (myvlanid == (ushort)-1)
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myvlanid = VLAN_NONE;
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mynvlanid = ntohs(NetOurNativeVLAN);
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if (mynvlanid == (ushort)-1)
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mynvlanid = VLAN_NONE;
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x = ntohs(et->et_protlen);
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#ifdef ET_DEBUG
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printf("packet received\n");
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#endif
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if (x < 1514) {
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/*
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* Got a 802 packet. Check the other protocol field.
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*/
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x = ntohs(et->et_prot);
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ip = (IP_t *)(inpkt + E802_HDR_SIZE);
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len -= E802_HDR_SIZE;
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} else if (x != PROT_VLAN) { /* normal packet */
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ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
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len -= ETHER_HDR_SIZE;
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} else { /* VLAN packet */
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VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
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#ifdef ET_DEBUG
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printf("VLAN packet received\n");
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#endif
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/* too small packet? */
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if (len < VLAN_ETHER_HDR_SIZE)
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return;
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/* if no VLAN active */
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if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
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)
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return;
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cti = ntohs(vet->vet_tag);
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vlanid = cti & VLAN_IDMASK;
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x = ntohs(vet->vet_type);
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ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
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len -= VLAN_ETHER_HDR_SIZE;
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}
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#ifdef ET_DEBUG
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printf("Receive from protocol 0x%x\n", x);
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#endif
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if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
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if (vlanid == VLAN_NONE)
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vlanid = (mynvlanid & VLAN_IDMASK);
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/* not matched? */
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if (vlanid != (myvlanid & VLAN_IDMASK))
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return;
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}
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switch (x) {
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case PROT_ARP:
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/*
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* We have to deal with two types of ARP packets:
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* - REQUEST packets will be answered by sending our
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* IP address - if we know it.
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* - REPLY packets are expected only after we asked
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* for the TFTP server's or the gateway's ethernet
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* address; so if we receive such a packet, we set
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* the server ethernet address
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*/
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#ifdef ET_DEBUG
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puts ("Got ARP\n");
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#endif
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arp = (ARP_t *)ip;
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if (len < ARP_HDR_SIZE) {
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printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
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return;
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}
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if (ntohs(arp->ar_hrd) != ARP_ETHER) {
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return;
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}
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if (ntohs(arp->ar_pro) != PROT_IP) {
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return;
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}
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if (arp->ar_hln != 6) {
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return;
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}
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if (arp->ar_pln != 4) {
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return;
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}
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if (NetOurIP == 0) {
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return;
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}
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if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
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return;
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}
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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);
|
|
memcpy(NetTxPacket, et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
|
|
eth_send((uchar *)NetTxPacket, (pkt - (uchar *)et) + ARP_HDR_SIZE);
|
|
return;
|
|
|
|
case ARPOP_REPLY: /* arp reply */
|
|
/* are we waiting for a reply */
|
|
if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
|
|
break;
|
|
#ifdef ET_DEBUG
|
|
printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
|
|
arp->ar_data[0], arp->ar_data[1],
|
|
arp->ar_data[2], arp->ar_data[3],
|
|
arp->ar_data[4], arp->ar_data[5]);
|
|
#endif
|
|
|
|
tmp = NetReadIP(&arp->ar_data[6]);
|
|
|
|
/* matched waiting packet's address */
|
|
if (tmp == NetArpWaitReplyIP) {
|
|
#ifdef ET_DEBUG
|
|
puts ("Got it\n");
|
|
#endif
|
|
/* save address for later use */
|
|
memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
|
|
|
|
#ifdef CONFIG_NETCONSOLE
|
|
(*packetHandler)(0,0,0,0);
|
|
#endif
|
|
/* modify header, and transmit it */
|
|
memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
|
|
(void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
|
|
|
|
/* no arp request pending now */
|
|
NetArpWaitPacketIP = 0;
|
|
NetArpWaitTxPacketSize = 0;
|
|
NetArpWaitPacketMAC = NULL;
|
|
|
|
}
|
|
return;
|
|
default:
|
|
#ifdef ET_DEBUG
|
|
printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
|
|
#endif
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case PROT_RARP:
|
|
#ifdef ET_DEBUG
|
|
puts ("Got RARP\n");
|
|
#endif
|
|
arp = (ARP_t *)ip;
|
|
if (len < ARP_HDR_SIZE) {
|
|
printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
|
|
return;
|
|
}
|
|
|
|
if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
|
|
(ntohs(arp->ar_hrd) != ARP_ETHER) ||
|
|
(ntohs(arp->ar_pro) != PROT_IP) ||
|
|
(arp->ar_hln != 6) || (arp->ar_pln != 4)) {
|
|
|
|
puts ("invalid RARP header\n");
|
|
} else {
|
|
NetCopyIP(&NetOurIP, &arp->ar_data[16]);
|
|
if (NetServerIP == 0)
|
|
NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
|
|
memcpy (NetServerEther, &arp->ar_data[ 0], 6);
|
|
|
|
(*packetHandler)(0,0,0,0);
|
|
}
|
|
break;
|
|
|
|
case PROT_IP:
|
|
#ifdef ET_DEBUG
|
|
puts ("Got IP\n");
|
|
#endif
|
|
if (len < IP_HDR_SIZE) {
|
|
debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
|
|
return;
|
|
}
|
|
if (len < ntohs(ip->ip_len)) {
|
|
printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
|
|
return;
|
|
}
|
|
len = ntohs(ip->ip_len);
|
|
#ifdef ET_DEBUG
|
|
printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
|
|
#endif
|
|
if ((ip->ip_hl_v & 0xf0) != 0x40) {
|
|
return;
|
|
}
|
|
if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
|
|
return;
|
|
}
|
|
if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
|
|
puts ("checksum bad\n");
|
|
return;
|
|
}
|
|
tmp = NetReadIP(&ip->ip_dst);
|
|
if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
|
|
return;
|
|
}
|
|
/*
|
|
* watch for ICMP host redirects
|
|
*
|
|
* There is no real handler code (yet). We just watch
|
|
* for ICMP host redirect messages. In case anybody
|
|
* sees these messages: please contact me
|
|
* (wd@denx.de), or - even better - send me the
|
|
* necessary fixes :-)
|
|
*
|
|
* Note: in all cases where I have seen this so far
|
|
* it was a problem with the router configuration,
|
|
* for instance when a router was configured in the
|
|
* BOOTP reply, but the TFTP server was on the same
|
|
* subnet. So this is probably a warning that your
|
|
* configuration might be wrong. But I'm not really
|
|
* sure if there aren't any other situations.
|
|
*/
|
|
if (ip->ip_p == IPPROTO_ICMP) {
|
|
ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
|
|
|
|
switch (icmph->type) {
|
|
case ICMP_REDIRECT:
|
|
if (icmph->code != ICMP_REDIR_HOST)
|
|
return;
|
|
puts (" ICMP Host Redirect to ");
|
|
print_IPaddr(icmph->un.gateway);
|
|
putchar(' ');
|
|
return;
|
|
#ifdef CONFIG_NET_PING
|
|
case ICMP_ECHO_REPLY:
|
|
/*
|
|
* IP header OK. Pass the packet to the current handler.
|
|
*/
|
|
/* XXX point to ip packet */
|
|
(*packetHandler)((uchar *)ip, 0, 0, 0);
|
|
return;
|
|
#endif
|
|
default:
|
|
return;
|
|
}
|
|
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_UDP_CHECKSUM
|
|
if (ip->udp_xsum != 0) {
|
|
ulong xsum;
|
|
ushort *sumptr;
|
|
ushort sumlen;
|
|
|
|
xsum = ip->ip_p;
|
|
xsum += (ntohs(ip->udp_len));
|
|
xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
|
|
xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
|
|
|
|
sumlen = ntohs(ip->udp_len);
|
|
sumptr = (ushort *) &(ip->udp_src);
|
|
|
|
while (sumlen > 1) {
|
|
ushort sumdata;
|
|
|
|
sumdata = *sumptr++;
|
|
xsum += ntohs(sumdata);
|
|
sumlen -= 2;
|
|
}
|
|
if (sumlen > 0) {
|
|
ushort sumdata;
|
|
|
|
sumdata = *(unsigned char *) sumptr;
|
|
sumdata = (sumdata << 8) & 0xff00;
|
|
xsum += sumdata;
|
|
}
|
|
while ((xsum >> 16) != 0) {
|
|
xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
|
|
}
|
|
if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
|
|
printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_NETCONSOLE
|
|
nc_input_packet((uchar *)ip +IP_HDR_SIZE,
|
|
ntohs(ip->udp_dst),
|
|
ntohs(ip->udp_src),
|
|
ntohs(ip->udp_len) - 8);
|
|
#endif
|
|
/*
|
|
* IP header OK. Pass the packet to the current handler.
|
|
*/
|
|
(*packetHandler)((uchar *)ip +IP_HDR_SIZE,
|
|
ntohs(ip->udp_dst),
|
|
ntohs(ip->udp_src),
|
|
ntohs(ip->udp_len) - 8);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/**********************************************************************/
|
|
|
|
static int net_check_prereq (proto_t protocol)
|
|
{
|
|
struct eth_device *edev = eth_get_current();
|
|
|
|
switch (protocol) {
|
|
/* Fall through */
|
|
#ifdef CONFIG_NET_NFS
|
|
case NFS:
|
|
#endif
|
|
case NETCONS:
|
|
case TFTP:
|
|
if (NetServerIP == 0) {
|
|
printf("*** ERROR: `%s.serverip' not set\n", dev_id(&edev->dev));
|
|
return -1;
|
|
}
|
|
|
|
if (NetOurIP == 0) {
|
|
printf("*** ERROR: `%s.ipaddr' not set\n", dev_id(&edev->dev));
|
|
return -1;
|
|
}
|
|
/* Fall through */
|
|
|
|
case DHCP:
|
|
case RARP:
|
|
case BOOTP:
|
|
if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
|
|
printf("*** ERROR: `%s.ethaddr' not set\n", dev_id(&edev->dev));
|
|
return -1;
|
|
}
|
|
/* Fall through */
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return -1; /* not reached */
|
|
}
|
|
/**********************************************************************/
|
|
|
|
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(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(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(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);
|
|
}
|
|
|
|
char *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)
|
|
);
|
|
return s;
|
|
}
|
|
|
|
int string_to_ip(const char *s, IPaddr_t *ip)
|
|
{
|
|
IPaddr_t addr = 0;
|
|
char *e;
|
|
int i;
|
|
|
|
if (!s)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
ulong val;
|
|
|
|
if (!isdigit(*s))
|
|
return -EINVAL;
|
|
|
|
val = simple_strtoul(s, &e, 10);
|
|
addr <<= 8;
|
|
addr |= (val & 0xFF);
|
|
|
|
if (*e != '.' && i != 3)
|
|
return -EINVAL;
|
|
|
|
s = e + 1;
|
|
}
|
|
|
|
*ip = htonl(addr);
|
|
return 0;
|
|
}
|
|
|
|
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(const 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);
|
|
}
|
|
|
|
ushort getenv_VLAN(char *var)
|
|
{
|
|
return string_to_VLAN(getenv(var));
|
|
}
|
|
|
|
int string_to_ethaddr(const char *str, char *enetaddr)
|
|
{
|
|
ulong reg;
|
|
char *e;
|
|
|
|
if (!str || strlen(str) != 17)
|
|
return -1;
|
|
|
|
if (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
|
|
str[11] != ':' || str[14] != ':')
|
|
return -1;
|
|
|
|
for (reg = 0; reg < 6; ++reg) {
|
|
enetaddr[reg] = simple_strtoul (str, &e, 16);
|
|
str = e + 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ethaddr_to_string(const unsigned char *enetaddr, char *str)
|
|
{
|
|
sprintf (str, "%02X:%02X:%02X:%02X:%02X:%02X",
|
|
enetaddr[0], enetaddr[1], enetaddr[2], enetaddr[3],
|
|
enetaddr[4], enetaddr[5]);
|
|
}
|
|
|