/* * Copied from Linux Monitor (LiMon) - Networking. * * Copyright 1994 - 2000 Neil Russell. * (See License) * Copyright 2000 Roland Borde * Copyright 2000 Paolo Scaffardi * Copyright 2000-2002 Wolfgang Denk, wd@denx.de */ /* * General Desription: * * The user interface supports commands for BOOTP, RARP, and TFTP. * Also, we support ARP internally. Depending on available data, * these interact as follows: * * BOOTP: * * Prerequisites: - own ethernet address * We want: - own IP address * - TFTP server IP address * - name of bootfile * Next step: ARP * * RARP: * * Prerequisites: - own ethernet address * We want: - own IP address * - TFTP server IP address * Next step: ARP * * ARP: * * Prerequisites: - own ethernet address * - own IP address * - TFTP server IP address * We want: - TFTP server ethernet address * Next step: TFTP * * DHCP: * * Prerequisites: - own ethernet address * We want: - IP, Netmask, ServerIP, Gateway IP * - bootfilename, lease time * Next step: - TFTP * * TFTP: * * Prerequisites: - own ethernet address * - own IP address * - TFTP server IP address * - TFTP server ethernet address * - name of bootfile (if unknown, we use a default name * derived from our own IP address) * We want: - load the boot file * Next step: none * * NFS: * * Prerequisites: - own ethernet address * - own IP address * - name of bootfile (if unknown, we use a default name * derived from our own IP address) * We want: - load the boot file * Next step: none * * SNTP: * * Prerequisites: - own ethernet address * - own IP address * We want: - network time * Next step: none */ #include <common.h> #include <watchdog.h> #include <command.h> #include <net.h> #include "bootp.h" #include "tftp.h" #include "rarp.h" #include "nfs.h" #ifdef CONFIG_STATUS_LED #include <status_led.h> #include <miiphy.h> #endif #if defined(CONFIG_CMD_SNTP) #include "sntp.h" #endif #if defined(CONFIG_CDP_VERSION) #include <timestamp.h> #endif #if defined(CONFIG_CMD_DNS) #include "dns.h" #endif #if defined(CONFIG_CMD_NET) DECLARE_GLOBAL_DATA_PTR; #ifndef CONFIG_ARP_TIMEOUT # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */ #else # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT #endif #ifndef CONFIG_NET_RETRY_COUNT # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ #else # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT #endif /** BOOTP EXTENTIONS **/ IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ #if defined(CONFIG_BOOTP_DNS2) IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ #endif char NetOurNISDomain[32]={0,}; /* Our NIS domain */ char NetOurHostName[32]={0,}; /* Our hostname */ char NetOurRootPath[64]={0,}; /* Our bootpath */ ushort NetBootFileSize=0; /* Our bootfile size in blocks */ #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ IPaddr_t Mcast_addr; #endif /** END OF BOOTP EXTENTIONS **/ ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ uchar NetOurEther[6]; /* Our ethernet address */ uchar NetServerEther[6] = /* Boot server enet address */ { 0, 0, 0, 0, 0, 0 }; IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ volatile uchar *NetRxPacket; /* Current receive packet */ int NetRxPacketLen; /* Current rx packet length */ unsigned NetIPID; /* IP packet ID */ uchar NetBcastAddr[6] = /* Ethernet bcast address */ { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; uchar NetEtherNullAddr[6] = { 0, 0, 0, 0, 0, 0 }; #ifdef CONFIG_API void (*push_packet)(volatile void *, int len) = 0; #endif #if defined(CONFIG_CMD_CDP) uchar NetCDPAddr[6] = /* Ethernet bcast address */ { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; #endif int NetState; /* Network loop state */ #ifdef CONFIG_NET_MULTI int NetRestartWrap = 0; /* Tried all network devices */ static int NetRestarted = 0; /* Network loop restarted */ static int NetDevExists = 0; /* At least one device configured */ #endif /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ char BootFile[128]; /* Boot File name */ #if defined(CONFIG_CMD_PING) IPaddr_t NetPingIP; /* the ip address to ping */ static void PingStart(void); #endif #if defined(CONFIG_CMD_CDP) static void CDPStart(void); #endif #if defined(CONFIG_CMD_SNTP) IPaddr_t NetNtpServerIP; /* NTP server IP address */ int NetTimeOffset=0; /* offset time from UTC */ #endif #ifdef CONFIG_NETCONSOLE void NcStart(void); int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); #endif volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ static rxhand_f *packetHandler; /* Current RX packet handler */ static thand_f *timeHandler; /* Current timeout handler */ static ulong timeStart; /* Time base value */ static ulong timeDelta; /* Current timeout value */ volatile uchar *NetTxPacket = 0; /* THE transmit packet */ static int net_check_prereq (proto_t protocol); /**********************************************************************/ IPaddr_t NetArpWaitPacketIP; IPaddr_t NetArpWaitReplyIP; uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ uchar *NetArpWaitTxPacket; /* THE transmit packet */ int NetArpWaitTxPacketSize; uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; ulong NetArpWaitTimerStart; int NetArpWaitTry; void ArpRequest (void) { int i; volatile uchar *pkt; ARP_t *arp; debug("ARP broadcast %d\n", NetArpWaitTry); pkt = NetTxPacket; pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); arp = (ARP_t *) pkt; arp->ar_hrd = htons (ARP_ETHER); arp->ar_pro = htons (PROT_IP); arp->ar_hln = 6; arp->ar_pln = 4; arp->ar_op = htons (ARPOP_REQUEST); memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ for (i = 10; i < 16; ++i) { arp->ar_data[i] = 0; /* dest ET addr = 0 */ } if ((NetArpWaitPacketIP & NetOurSubnetMask) != (NetOurIP & NetOurSubnetMask)) { if (NetOurGatewayIP == 0) { puts ("## Warning: gatewayip needed but not set\n"); NetArpWaitReplyIP = NetArpWaitPacketIP; } else { NetArpWaitReplyIP = NetOurGatewayIP; } } else { NetArpWaitReplyIP = NetArpWaitPacketIP; } NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); } void ArpTimeoutCheck(void) { ulong t; if (!NetArpWaitPacketIP) return; t = get_timer(0); /* check for arp timeout */ if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { NetArpWaitTry++; if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { puts ("\nARP Retry count exceeded; starting again\n"); NetArpWaitTry = 0; NetStartAgain(); } else { NetArpWaitTimerStart = t; ArpRequest(); } } } static void NetInitLoop(proto_t protocol) { static int env_changed_id = 0; bd_t *bd = gd->bd; int env_id = get_env_id (); /* update only when the environment has changed */ if (env_changed_id != env_id) { NetCopyIP(&NetOurIP, &bd->bi_ip_addr); NetOurGatewayIP = getenv_IPaddr ("gatewayip"); NetOurSubnetMask= getenv_IPaddr ("netmask"); NetServerIP = getenv_IPaddr ("serverip"); NetOurNativeVLAN = getenv_VLAN("nvlan"); NetOurVLAN = getenv_VLAN("vlan"); #if defined(CONFIG_CMD_DNS) NetOurDNSIP = getenv_IPaddr("dnsip"); #endif env_changed_id = env_id; } return; } /**********************************************************************/ /* * Main network processing loop. */ int NetLoop(proto_t protocol) { bd_t *bd = gd->bd; #ifdef CONFIG_NET_MULTI NetRestarted = 0; NetDevExists = 0; #endif /* XXX problem with bss workaround */ NetArpWaitPacketMAC = NULL; NetArpWaitTxPacket = NULL; NetArpWaitPacketIP = 0; NetArpWaitReplyIP = 0; NetArpWaitTxPacket = NULL; NetTxPacket = NULL; if (!NetTxPacket) { int i; /* * Setup packet buffers, aligned correctly. */ NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; for (i = 0; i < PKTBUFSRX; i++) { NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; } } if (!NetArpWaitTxPacket) { NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; NetArpWaitTxPacketSize = 0; } eth_halt(); #ifdef CONFIG_NET_MULTI eth_set_current(); #endif if (eth_init(bd) < 0) { eth_halt(); return(-1); } restart: #ifdef CONFIG_NET_MULTI memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); #else eth_getenv_enetaddr("ethaddr", NetOurEther); #endif NetState = NETLOOP_CONTINUE; /* * Start the ball rolling with the given start function. From * here on, this code is a state machine driven by received * packets and timer events. */ NetInitLoop(protocol); switch (net_check_prereq (protocol)) { case 1: /* network not configured */ eth_halt(); return (-1); #ifdef CONFIG_NET_MULTI case 2: /* network device not configured */ break; #endif /* CONFIG_NET_MULTI */ case 0: #ifdef CONFIG_NET_MULTI NetDevExists = 1; #endif switch (protocol) { case TFTP: /* always use ARP to get server ethernet address */ TftpStart(); break; #if defined(CONFIG_CMD_DHCP) case DHCP: BootpTry = 0; NetOurIP = 0; DhcpRequest(); /* Basically same as BOOTP */ break; #endif case BOOTP: BootpTry = 0; NetOurIP = 0; BootpRequest (); break; case RARP: RarpTry = 0; NetOurIP = 0; RarpRequest (); break; #if defined(CONFIG_CMD_PING) case PING: PingStart(); break; #endif #if defined(CONFIG_CMD_NFS) case NFS: NfsStart(); break; #endif #if defined(CONFIG_CMD_CDP) case CDP: CDPStart(); break; #endif #ifdef CONFIG_NETCONSOLE case NETCONS: NcStart(); break; #endif #if defined(CONFIG_CMD_SNTP) case SNTP: SntpStart(); break; #endif #if defined(CONFIG_CMD_DNS) case DNS: DnsStart(); break; #endif default: break; } NetBootFileXferSize = 0; break; } #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) /* * Echo the inverted link state to the fault LED. */ if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { status_led_set (STATUS_LED_RED, STATUS_LED_OFF); } else { status_led_set (STATUS_LED_RED, STATUS_LED_ON); } #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ #endif /* CONFIG_MII, ... */ /* * Main packet reception loop. Loop receiving packets until * someone sets `NetState' to a state that terminates. */ for (;;) { WATCHDOG_RESET(); #ifdef CONFIG_SHOW_ACTIVITY { extern void show_activity(int arg); show_activity(1); } #endif /* * Check the ethernet for a new packet. The ethernet * receive routine will process it. */ eth_rx(); /* * Abort if ctrl-c was pressed. */ if (ctrlc()) { eth_halt(); puts ("\nAbort\n"); return (-1); } ArpTimeoutCheck(); /* * Check for a timeout, and run the timeout handler * if we have one. */ if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { thand_f *x; #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ defined(CONFIG_STATUS_LED) && \ defined(STATUS_LED_RED) /* * Echo the inverted link state to the fault LED. */ if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { status_led_set (STATUS_LED_RED, STATUS_LED_OFF); } else { status_led_set (STATUS_LED_RED, STATUS_LED_ON); } # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ #endif /* CONFIG_MII, ... */ x = timeHandler; timeHandler = (thand_f *)0; (*x)(); } switch (NetState) { case NETLOOP_RESTART: #ifdef CONFIG_NET_MULTI NetRestarted = 1; #endif goto restart; case NETLOOP_SUCCESS: if (NetBootFileXferSize > 0) { char buf[20]; printf("Bytes transferred = %ld (%lx hex)\n", NetBootFileXferSize, NetBootFileXferSize); sprintf(buf, "%lX", NetBootFileXferSize); setenv("filesize", buf); sprintf(buf, "%lX", (unsigned long)load_addr); setenv("fileaddr", buf); } eth_halt(); return NetBootFileXferSize; case NETLOOP_FAIL: return (-1); } } } /**********************************************************************/ static void startAgainTimeout(void) { NetState = NETLOOP_RESTART; } static void startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) { /* Totally ignore the packet */ } void NetStartAgain (void) { char *nretry; int noretry = 0, once = 0; if ((nretry = getenv ("netretry")) != NULL) { noretry = (strcmp (nretry, "no") == 0); once = (strcmp (nretry, "once") == 0); } if (noretry) { eth_halt (); NetState = NETLOOP_FAIL; return; } #ifndef CONFIG_NET_MULTI NetSetTimeout (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 && !once) { 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'; } #endif #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) ); } IPaddr_t string_to_ip(char *s) { IPaddr_t addr; char *e; int i; if (s == NULL) return(0); for (addr=0, i=0; i<4; ++i) { ulong val = s ? simple_strtoul(s, &e, 10) : 0; addr <<= 8; addr |= (val & 0xFF); if (s) { s = (*e) ? e+1 : e; } } return (htonl(addr)); } void VLAN_to_string(ushort x, char *s) { x = ntohs(x); if (x == (ushort)-1) x = VLAN_NONE; if (x == VLAN_NONE) strcpy(s, "none"); else sprintf(s, "%d", x & VLAN_IDMASK); } ushort string_to_VLAN(char *s) { ushort id; if (s == NULL) return htons(VLAN_NONE); if (*s < '0' || *s > '9') id = VLAN_NONE; else id = (ushort)simple_strtoul(s, NULL, 10); return htons(id); } IPaddr_t getenv_IPaddr (char *var) { return (string_to_ip(getenv(var))); } ushort getenv_VLAN(char *var) { return (string_to_VLAN(getenv(var))); }