upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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753 lines
16 KiB
753 lines
16 KiB
/*
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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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#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 "arp.h"
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#if (CONFIG_COMMANDS & CFG_CMD_NET)
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#if 0
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#define ET_DEBUG
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#endif
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/** BOOTP EXTENTIONS **/
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IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
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IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
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IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
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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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/** 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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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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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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volatile uchar *NetRxPkt; /* Current receive packet */
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int NetRxPktLen; /* Current rx packet length */
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unsigned NetIPID; /* IP packet ID */
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uchar NetBcastAddr[6] = /* Ethernet bcast address */
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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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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char BootFile[128]; /* Boot File name */
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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 timeValue; /* Current timeout value */
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volatile uchar *NetTxPacket = 0; /* THE transmit packet */
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static int net_check_prereq (proto_t protocol);
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/**********************************************************************/
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/*
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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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DECLARE_GLOBAL_DATA_PTR;
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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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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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eth_halt();
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eth_init(bd);
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restart:
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#ifdef CONFIG_NET_MULTI
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memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
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#else
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memcpy (NetOurEther, bd->bi_enetaddr, 6);
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#endif
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NetState = NETLOOP_CONTINUE;
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/*
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* Start the ball rolling with the given start function. From
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* here on, this code is a state machine driven by received
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* packets and timer events.
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*/
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switch (protocol) {
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case TFTP:
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NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
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NetServerIP = getenv_IPaddr ("serverip");
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NetOurGatewayIP = getenv_IPaddr ("gatewayip");
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NetOurSubnetMask= getenv_IPaddr ("netmask");
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break;
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case BOOTP:
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case RARP:
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/*
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* initialize our IP addr to 0 in order to accept ANY
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* IP addr assigned to us by the BOOTP / RARP server
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*/
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NetOurIP = 0;
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NetServerIP = 0;
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break;
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default:
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break;
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}
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switch (net_check_prereq (protocol)) {
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case 1:
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/* network not configured */
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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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ArpTry = 0;
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ArpRequest ();
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break;
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#if (CONFIG_COMMANDS & CFG_CMD_DHCP)
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case DHCP:
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/* Start with a clean slate... */
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NetOurIP = 0;
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NetServerIP = 0;
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DhcpRequest(); /* Basically same as BOOTP */
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break;
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#endif /* CFG_CMD_DHCP */
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case BOOTP:
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BootpTry = 0;
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BootpRequest ();
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break;
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case RARP:
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RarpTry = 0;
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RarpRequest ();
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break;
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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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/*
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* Main packet reception loop. Loop receiving packets until
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* someone sets `NetQuit'.
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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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printf("\nAbort\n");
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return (-1);
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}
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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) > timeValue)) {
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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_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[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, "%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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return (-1);
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}
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}
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}
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/**********************************************************************/
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static void
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startAgainTimeout(void)
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{
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NetState = NETLOOP_RESTART;
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}
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static void
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startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
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{
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/* Totally ignore the packet */
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}
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void
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NetStartAgain(void)
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{
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#ifndef CONFIG_NET_MULTI
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NetSetTimeout(10 * CFG_HZ, startAgainTimeout);
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NetSetHandler(startAgainHandler);
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#else
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DECLARE_GLOBAL_DATA_PTR;
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eth_halt();
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eth_try_another(!NetRestarted);
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eth_init(gd->bd);
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if (NetRestartWrap)
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{
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NetRestartWrap = 0;
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if (NetDevExists)
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{
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NetSetTimeout(10 * CFG_HZ, startAgainTimeout);
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NetSetHandler(startAgainHandler);
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}
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else
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{
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NetState = NETLOOP_FAIL;
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}
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}
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else
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{
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NetState = NETLOOP_RESTART;
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}
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#endif
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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(int 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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timeValue = get_timer(0) + iv;
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}
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}
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void
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NetSendPacket(volatile 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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void
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NetReceive(volatile uchar * pkt, 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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NetRxPkt = pkt;
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NetRxPktLen = len;
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et = (Ethernet_t *)pkt;
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x = ntohs(et->et_protlen);
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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 *)(pkt + E802_HDR_SIZE);
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len -= E802_HDR_SIZE;
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} else {
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ip = (IP_t *)(pkt + ETHER_HDR_SIZE);
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len -= 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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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 packates 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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printf("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)) {
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case ARPOP_REQUEST: /* reply with our IP address */
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#ifdef ET_DEBUG
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printf("Got ARP REQUEST, return our IP\n");
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#endif
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NetSetEther((uchar *)et, et->et_src, PROT_ARP);
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arp->ar_op = htons(ARPOP_REPLY);
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memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
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NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
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memcpy (&arp->ar_data[ 0], NetOurEther, 6);
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NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
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NetSendPacket((uchar *)et,((uchar *)arp-pkt)+ARP_HDR_SIZE);
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return;
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case ARPOP_REPLY: /* set TFTP server eth addr */
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#ifdef ET_DEBUG
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printf("Got ARP REPLY, set server/gtwy eth addr\n");
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#endif
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memcpy (NetServerEther, &arp->ar_data[0], 6);
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(*packetHandler)(0,0,0,0); /* start TFTP */
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return;
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default:
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#ifdef ET_DEBUG
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printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
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#endif
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return;
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}
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case PROT_RARP:
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#ifdef ET_DEBUG
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printf("Got RARP\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_op) != RARPOP_REPLY) ||
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(ntohs(arp->ar_hrd) != ARP_ETHER) ||
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(ntohs(arp->ar_pro) != PROT_IP) ||
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(arp->ar_hln != 6) || (arp->ar_pln != 4)) {
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printf("invalid RARP header\n");
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} else {
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NetCopyIP(&NetOurIP, &arp->ar_data[16]);
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NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
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memcpy (NetServerEther, &arp->ar_data[ 0], 6);
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(*packetHandler)(0,0,0,0);
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}
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break;
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case PROT_IP:
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#ifdef ET_DEBUG
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printf("Got IP\n");
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#endif
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if (len < IP_HDR_SIZE) {
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debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
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return;
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}
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if (len < ntohs(ip->ip_len)) {
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printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
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return;
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}
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len = ntohs(ip->ip_len);
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#ifdef ET_DEBUG
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printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
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#endif
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if ((ip->ip_hl_v & 0xf0) != 0x40) {
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return;
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}
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if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
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return;
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}
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if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
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printf("checksum bad\n");
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return;
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}
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tmp = NetReadIP(&ip->ip_dst);
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if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
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return;
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}
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/*
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* watch for ICMP host redirects
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*
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* There is no real handler code (yet). We just watch
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* for ICMP host redirect messages. In case anybody
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* sees these messages: please contact me
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* (wd@denx.de), or - even better - send me the
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|
* necessary fixes :-)
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|
*
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|
* Note: in all cases where I have seen this so far
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|
* it was a problem with the router configuration,
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* for instance when a router was configured in the
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* BOOTP reply, but the TFTP server was on the same
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* subnet. So this is probably a warning that your
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* configuration might be wrong. But I'm not really
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* sure if there aren't any other situations.
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*/
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if (ip->ip_p == IPPROTO_ICMP) {
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ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
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|
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if (icmph->type != ICMP_REDIRECT)
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return;
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if (icmph->code != ICMP_REDIR_HOST)
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return;
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puts (" ICMP Host Redirect to ");
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|
print_IPaddr(icmph->un.gateway);
|
|
putc(' ');
|
|
} else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
case ARP: /* nothing to do */
|
|
break;
|
|
|
|
case TFTP:
|
|
if (NetServerIP == 0) {
|
|
puts ("*** ERROR: `serverip' not set\n");
|
|
return (1);
|
|
}
|
|
|
|
if (NetOurIP == 0) {
|
|
puts ("*** ERROR: `ipaddr' not set\n");
|
|
return (1);
|
|
}
|
|
/* Fall through */
|
|
|
|
case DHCP:
|
|
case RARP:
|
|
case BOOTP:
|
|
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 */
|
|
}
|
|
return (0); /* OK */
|
|
}
|
|
/**********************************************************************/
|
|
|
|
int
|
|
NetCksumOk(uchar * ptr, int len)
|
|
{
|
|
return !((NetCksum(ptr, len) + 1) & 0xfffe);
|
|
}
|
|
|
|
|
|
unsigned
|
|
NetCksum(uchar * ptr, int len)
|
|
{
|
|
ulong xsum;
|
|
|
|
xsum = 0;
|
|
while (len-- > 0)
|
|
xsum += *((ushort *)ptr)++;
|
|
xsum = (xsum & 0xffff) + (xsum >> 16);
|
|
xsum = (xsum & 0xffff) + (xsum >> 16);
|
|
return (xsum & 0xffff);
|
|
}
|
|
|
|
|
|
void
|
|
NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
|
|
{
|
|
Ethernet_t *et = (Ethernet_t *)xet;
|
|
|
|
memcpy (et->et_dest, addr, 6);
|
|
memcpy (et->et_src, NetOurEther, 6);
|
|
et->et_protlen = htons(prot);
|
|
}
|
|
|
|
|
|
void
|
|
NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
|
|
{
|
|
volatile IP_t *ip = (IP_t *)xip;
|
|
|
|
/*
|
|
* If the data is an odd number of bytes, zero the
|
|
* byte after the last byte so that the checksum
|
|
* will work.
|
|
*/
|
|
if (len & 1)
|
|
xip[IP_HDR_SIZE + len] = 0;
|
|
|
|
/*
|
|
* Construct an IP and UDP header.
|
|
(need to set no fragment bit - XXX)
|
|
*/
|
|
ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
|
|
ip->ip_tos = 0;
|
|
ip->ip_len = htons(IP_HDR_SIZE + len);
|
|
ip->ip_id = htons(NetIPID++);
|
|
ip->ip_off = htons(0x4000); /* No fragmentation */
|
|
ip->ip_ttl = 255;
|
|
ip->ip_p = 17; /* UDP */
|
|
ip->ip_sum = 0;
|
|
NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
|
|
NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
|
|
ip->udp_src = htons(sport);
|
|
ip->udp_dst = htons(dport);
|
|
ip->udp_len = htons(8 + len);
|
|
ip->udp_xsum = 0;
|
|
ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
|
|
}
|
|
|
|
void copy_filename (uchar *dst, uchar *src, int size)
|
|
{
|
|
if (*src && (*src == '"')) {
|
|
++src;
|
|
--size;
|
|
}
|
|
|
|
while ((--size > 0) && *src && (*src != '"')) {
|
|
*dst++ = *src++;
|
|
}
|
|
*dst = '\0';
|
|
}
|
|
|
|
#endif /* CFG_CMD_NET */
|
|
|
|
void ip_to_string (IPaddr_t x, char *s)
|
|
{
|
|
x = ntohl(x);
|
|
sprintf (s,"%d.%d.%d.%d",
|
|
(int)((x >> 24) & 0xff),
|
|
(int)((x >> 16) & 0xff),
|
|
(int)((x >> 8) & 0xff),
|
|
(int)((x >> 0) & 0xff)
|
|
);
|
|
}
|
|
|
|
void print_IPaddr (IPaddr_t x)
|
|
{
|
|
char tmp[16];
|
|
|
|
ip_to_string(x, tmp);
|
|
|
|
puts(tmp);
|
|
}
|
|
|
|
IPaddr_t getenv_IPaddr (char *var)
|
|
{
|
|
IPaddr_t addr;
|
|
char *s, *e;
|
|
int i;
|
|
|
|
s = getenv (var);
|
|
|
|
for (addr=0, i=0; i<4; ++i) {
|
|
ulong val = s ? simple_strtoul(s, &e, 10) : 0;
|
|
addr <<= 8;
|
|
addr |= (val & 0xFF);
|
|
if (s) {
|
|
s = (*e) ? e+1 : e;
|
|
}
|
|
}
|
|
|
|
return (htonl(addr));
|
|
}
|
|
|