X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=net%2Fnet.c;h=e8ff0662b8858f313f769e26c134c1e93d5bd10e;hb=4212098181ac91e14374c1207b1e98595f1cc717;hp=cde26801b385b8e29a4e44a5e147514d4112c088;hpb=b90296fc39a33f84bb2b0aa79bf997be495ba791;p=u-boot diff --git a/net/net.c b/net/net.c index cde26801b3..e8ff0662b8 100644 --- a/net/net.c +++ b/net/net.c @@ -23,6 +23,12 @@ * - name of bootfile * Next step: ARP * + * LINK_LOCAL: + * + * Prerequisites: - own ethernet address + * We want: - own IP address + * Next step: ARP + * * RARP: * * Prerequisites: - own ethernet address @@ -75,48 +81,51 @@ #include -#include #include #include -#include "bootp.h" -#include "tftp.h" -#include "rarp.h" -#include "nfs.h" -#ifdef CONFIG_STATUS_LED -#include +#if defined(CONFIG_STATUS_LED) #include +#include #endif +#include +#include +#include "arp.h" +#include "bootp.h" +#include "cdp.h" +#if defined(CONFIG_CMD_DNS) +#include "dns.h" +#endif +#include "link_local.h" +#include "nfs.h" +#include "ping.h" +#include "rarp.h" #if defined(CONFIG_CMD_SNTP) #include "sntp.h" #endif - -#if defined(CONFIG_CMD_NET) +#include "tftp.h" DECLARE_GLOBAL_DATA_PTR; -#define ARP_TIMEOUT 5 /* Seconds before trying ARP again */ -#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 - -#if 0 -#define ET_DEBUG -#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 */ +/* Our subnet mask (0=unknown) */ +IPaddr_t NetOurSubnetMask; +/* Our gateways IP address */ +IPaddr_t NetOurGatewayIP; +/* Our DNS IP address */ +IPaddr_t NetOurDNSIP; #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 */ +/* Our 2nd DNS IP address */ +IPaddr_t NetOurDNS2IP; +#endif +/* Our NIS domain */ +char NetOurNISDomain[32] = {0,}; +/* Our hostname */ +char NetOurHostName[32] = {0,}; +/* Our bootpath */ +char NetOurRootPath[64] = {0,}; +/* Our bootfile size in blocks */ +ushort NetBootFileSize; #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ IPaddr_t Mcast_addr; @@ -124,144 +133,169 @@ IPaddr_t Mcast_addr; /** 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; /* Our IP addr (0 = unknown) */ -volatile uchar *NetRxPkt; /* Current receive packet */ -int NetRxPktLen; /* 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 }; -#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 +/* The actual transferred size of the bootfile (in bytes) */ +ulong NetBootFileXferSize; +/* Our ethernet address */ +uchar NetOurEther[6]; +/* Boot server enet address */ +uchar NetServerEther[6]; +/* Our IP addr (0 = unknown) */ +IPaddr_t NetOurIP; +/* Server IP addr (0 = unknown) */ +IPaddr_t NetServerIP; +/* Current receive packet */ +uchar *NetRxPacket; +/* Current rx packet length */ +int NetRxPacketLen; +/* IP packet ID */ +unsigned NetIPID; +/* Ethernet bcast address */ +uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; +uchar NetEtherNullAddr[6]; +#ifdef CONFIG_API +void (*push_packet)(void *, int len) = 0; +#endif +/* Network loop state */ +enum net_loop_state net_state; +/* Tried all network devices */ +int NetRestartWrap; +/* Network loop restarted */ +static int NetRestarted; +/* At least one device configured */ +static int NetDevExists; /* 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 +/* default is without VLAN */ +ushort NetOurVLAN = 0xFFFF; +/* ditto */ +ushort NetOurNativeVLAN = 0xFFFF; -#if defined(CONFIG_CMD_CDP) -static void CDPStart(void); -#endif +/* Boot File name */ +char BootFile[128]; #if defined(CONFIG_CMD_SNTP) -IPaddr_t NetNtpServerIP; /* NTP server IP address */ -int NetTimeOffset=0; /* offset time from UTC */ +/* NTP server IP address */ +IPaddr_t NetNtpServerIP; +/* offset time from UTC */ +int NetTimeOffset; #endif -#ifdef CONFIG_NETCONSOLE -void NcStart(void); -int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); -#endif +uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; -volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; +/* Receive packet */ +uchar *NetRxPackets[PKTBUFSRX]; -volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ +/* Current UDP RX packet handler */ +static rxhand_f *udp_packet_handler; +/* Current ARP RX packet handler */ +static rxhand_f *arp_packet_handler; +#ifdef CONFIG_CMD_TFTPPUT +/* Current ICMP rx handler */ +static rxhand_icmp_f *packet_icmp_handler; +#endif +/* Current timeout handler */ +static thand_f *timeHandler; +/* Time base value */ +static ulong timeStart; +/* Current timeout value */ +static ulong timeDelta; +/* THE transmit packet */ +uchar *NetTxPacket; -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(enum proto_t protocol); -static int net_check_prereq (proto_t protocol); +static int NetTryCount; /**********************************************************************/ -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) +/* + * Check if autoload is enabled. If so, use either NFS or TFTP to download + * the boot file. + */ +void net_auto_load(void) { - int i; - volatile uchar *pkt; - ARP_t *arp; + const char *s = getenv("autoload"); -#ifdef ET_DEBUG - printf ("ARP broadcast %d\n", NetArpWaitTry); + if (s != NULL) { + if (*s == 'n') { + /* + * Just use BOOTP/RARP to configure system; + * Do not use TFTP to load the bootfile. + */ + net_set_state(NETLOOP_SUCCESS); + return; + } +#if defined(CONFIG_CMD_NFS) + if (strcmp(s, "NFS") == 0) { + /* + * Use NFS to load the bootfile. + */ + NfsStart(); + return; + } #endif - 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 */ } + TftpStart(TFTPGET); +} - if ((NetArpWaitPacketIP & NetOurSubnetMask) != - (NetOurIP & NetOurSubnetMask)) { - if (NetOurGatewayIP == 0) { - puts ("## Warning: gatewayip needed but not set\n"); - NetArpWaitReplyIP = NetArpWaitPacketIP; - } else { - NetArpWaitReplyIP = NetOurGatewayIP; - } - } else { - NetArpWaitReplyIP = NetArpWaitPacketIP; +static void NetInitLoop(void) +{ + static int env_changed_id; + int env_id = get_env_id(); + + /* update only when the environment has changed */ + if (env_changed_id != env_id) { + NetOurIP = getenv_IPaddr("ipaddr"); + 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; } + memcpy(NetOurEther, eth_get_dev()->enetaddr, 6); - NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); - (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); + return; } -void ArpTimeoutCheck(void) +static void net_clear_handlers(void) { - ulong t; + net_set_udp_handler(NULL); + net_set_arp_handler(NULL); + NetSetTimeout(0, NULL); +} - if (!NetArpWaitPacketIP) - return; +static void net_cleanup_loop(void) +{ + net_clear_handlers(); +} + +void net_init(void) +{ + static int first_call = 1; + + if (first_call) { + /* + * Setup packet buffers, aligned correctly. + */ + int i; - t = get_timer(0); + NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); + NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; + for (i = 0; i < PKTBUFSRX; i++) + NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN; - /* check for arp timeout */ - if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { - NetArpWaitTry++; + ArpInit(); + net_clear_handlers(); - if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { - puts ("\nARP Retry count exceeded; starting again\n"); - NetArpWaitTry = 0; - NetStartAgain(); - } else { - NetArpWaitTimerStart = t; - ArpRequest(); - } + /* Only need to setup buffer pointers once. */ + first_call = 0; } + + NetInitLoop(); } /**********************************************************************/ @@ -269,169 +303,86 @@ void ArpTimeoutCheck(void) * Main network processing loop. */ -int -NetLoop(proto_t protocol) +int NetLoop(enum proto_t protocol) { bd_t *bd = gd->bd; + int ret = -1; -#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; - } + NetTryCount = 1; + debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n"); + bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); + net_init(); eth_halt(); -#ifdef CONFIG_NET_MULTI eth_set_current(); -#endif if (eth_init(bd) < 0) { eth_halt(); - return(-1); + return -1; } restart: -#ifdef CONFIG_NET_MULTI - memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); -#else - memcpy (NetOurEther, bd->bi_enetaddr, 6); -#endif - - NetState = NETLOOP_CONTINUE; + net_set_state(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. */ + debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n"); + NetInitLoop(); - switch (protocol) { -#if defined(CONFIG_CMD_NFS) - case NFS: -#endif -#if defined(CONFIG_CMD_PING) - case PING: -#endif -#if defined(CONFIG_CMD_SNTP) - case SNTP: -#endif - case NETCONS: - case TFTP: - NetCopyIP(&NetOurIP, &bd->bi_ip_addr); - NetOurGatewayIP = getenv_IPaddr ("gatewayip"); - NetOurSubnetMask= getenv_IPaddr ("netmask"); - NetOurVLAN = getenv_VLAN("vlan"); - NetOurNativeVLAN = getenv_VLAN("nvlan"); - - switch (protocol) { -#if defined(CONFIG_CMD_NFS) - case NFS: -#endif - case NETCONS: - case TFTP: - NetServerIP = getenv_IPaddr ("serverip"); - break; -#if defined(CONFIG_CMD_PING) - case PING: - /* nothing */ - break; -#endif -#if defined(CONFIG_CMD_SNTP) - case SNTP: - /* nothing */ - break; -#endif - default: - break; - } - - break; - case BOOTP: - case RARP: - /* - * initialize our IP addr to 0 in order to accept ANY - * IP addr assigned to us by the BOOTP / RARP server - */ - NetOurIP = 0; - NetServerIP = getenv_IPaddr ("serverip"); - NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ - NetOurNativeVLAN = getenv_VLAN("nvlan"); - case CDP: - NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ - NetOurNativeVLAN = getenv_VLAN("nvlan"); - break; - default: - break; - } - - switch (net_check_prereq (protocol)) { + switch (net_check_prereq(protocol)) { case 1: /* network not configured */ eth_halt(); - return (-1); + 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 + NetBootFileXferSize = 0; switch (protocol) { - case TFTP: + case TFTPGET: +#ifdef CONFIG_CMD_TFTPPUT + case TFTPPUT: +#endif /* always use ARP to get server ethernet address */ - TftpStart(); + TftpStart(protocol); break; - +#ifdef CONFIG_CMD_TFTPSRV + case TFTPSRV: + TftpStartServer(); + break; +#endif #if defined(CONFIG_CMD_DHCP) case DHCP: - /* Start with a clean slate... */ BootpTry = 0; NetOurIP = 0; - NetServerIP = getenv_IPaddr ("serverip"); DhcpRequest(); /* Basically same as BOOTP */ break; #endif case BOOTP: BootpTry = 0; - BootpRequest (); + NetOurIP = 0; + BootpRequest(); break; +#if defined(CONFIG_CMD_RARP) case RARP: RarpTry = 0; - RarpRequest (); + NetOurIP = 0; + RarpRequest(); break; +#endif #if defined(CONFIG_CMD_PING) case PING: - PingStart(); + ping_start(); break; #endif #if defined(CONFIG_CMD_NFS) @@ -453,53 +404,67 @@ restart: case SNTP: SntpStart(); break; +#endif +#if defined(CONFIG_CMD_DNS) + case DNS: + DnsStart(); + break; +#endif +#if defined(CONFIG_CMD_LINK_LOCAL) + case LINKLOCAL: + link_local_start(); + break; #endif default: break; } - NetBootFileXferSize = 0; break; } #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) -#if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) +#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, CFG_FAULT_MII_ADDR)) { - status_led_set (STATUS_LED_RED, STATUS_LED_OFF); - } else { - status_led_set (STATUS_LED_RED, STATUS_LED_ON); - } -#endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ + 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. + * someone sets `net_state' to a state that terminates. */ for (;;) { WATCHDOG_RESET(); #ifdef CONFIG_SHOW_ACTIVITY - { - extern void show_activity(int arg); - show_activity(1); - } + show_activity(1); #endif /* * Check the ethernet for a new packet. The ethernet * receive routine will process it. */ - eth_rx(); + eth_rx(); /* * Abort if ctrl-c was pressed. */ if (ctrlc()) { + /* cancel any ARP that may not have completed */ + NetArpWaitPacketIP = 0; + + net_cleanup_loop(); eth_halt(); - puts ("\nAbort\n"); - return (-1); + puts("\nAbort\n"); + /* include a debug print as well incase the debug + messages are directed to stderr */ + debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n"); + goto done; } ArpTimeoutCheck(); @@ -512,34 +477,35 @@ restart: thand_f *x; #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) -# if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ - defined(CONFIG_STATUS_LED) && \ - defined(STATUS_LED_RED) +#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, CFG_FAULT_MII_ADDR)) { - status_led_set (STATUS_LED_RED, STATUS_LED_OFF); + 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); + status_led_set(STATUS_LED_RED, STATUS_LED_ON); } -# endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ +#endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ #endif /* CONFIG_MII, ... */ + debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n"); x = timeHandler; timeHandler = (thand_f *)0; (*x)(); } - switch (NetState) { + switch (net_state) { case NETLOOP_RESTART: -#ifdef CONFIG_NET_MULTI NetRestarted = 1; -#endif goto restart; case NETLOOP_SUCCESS: + net_cleanup_loop(); if (NetBootFileXferSize > 0) { char buf[20]; printf("Bytes transferred = %ld (%lx hex)\n", @@ -552,12 +518,27 @@ restart: setenv("fileaddr", buf); } eth_halt(); - return NetBootFileXferSize; + ret = NetBootFileXferSize; + debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n"); + goto done; case NETLOOP_FAIL: - return (-1); + net_cleanup_loop(); + debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n"); + goto done; + + case NETLOOP_CONTINUE: + continue; } } + +done: +#ifdef CONFIG_CMD_TFTPPUT + /* Clear out the handlers */ + net_set_udp_handler(NULL); + net_set_icmp_handler(NULL); +#endif + return ret; } /**********************************************************************/ @@ -565,48 +546,52 @@ restart: static void startAgainTimeout(void) { - NetState = NETLOOP_RESTART; + net_set_state(NETLOOP_RESTART); } -static void -startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) -{ - /* Totally ignore the packet */ -} - -void NetStartAgain (void) +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; + int retry_forever = 0; + unsigned long retrycnt = 0; + + nretry = getenv("netretry"); + if (nretry) { + if (!strcmp(nretry, "yes")) + retry_forever = 1; + else if (!strcmp(nretry, "no")) + retrycnt = 0; + else if (!strcmp(nretry, "once")) + retrycnt = 1; + else + retrycnt = simple_strtoul(nretry, NULL, 0); + } else + retry_forever = 1; + + if ((!retry_forever) && (NetTryCount >= retrycnt)) { + eth_halt(); + net_set_state(NETLOOP_FAIL); return; } -#ifndef CONFIG_NET_MULTI - NetSetTimeout (10 * CFG_HZ, startAgainTimeout); - NetSetHandler (startAgainHandler); -#else /* !CONFIG_NET_MULTI*/ - eth_halt (); - eth_try_another (!NetRestarted); - eth_init (gd->bd); + + NetTryCount++; + + 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 (10 * CFG_HZ, startAgainTimeout); - NetSetHandler (startAgainHandler); + if (NetDevExists) { + NetSetTimeout(10000UL, startAgainTimeout); + net_set_udp_handler(NULL); } else { - NetState = NETLOOP_FAIL; + net_set_state(NETLOOP_FAIL); } } else { - NetState = NETLOOP_RESTART; + net_set_state(NETLOOP_RESTART); } -#endif /* CONFIG_NET_MULTI */ } /**********************************************************************/ @@ -614,36 +599,74 @@ void NetStartAgain (void) * Miscelaneous bits. */ -void -NetSetHandler(rxhand_f * f) +static void dummy_handler(uchar *pkt, unsigned dport, + IPaddr_t sip, unsigned sport, + unsigned len) { - packetHandler = f; } +rxhand_f *net_get_udp_handler(void) +{ + return udp_packet_handler; +} + +void net_set_udp_handler(rxhand_f *f) +{ + debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f); + if (f == NULL) + udp_packet_handler = dummy_handler; + else + udp_packet_handler = f; +} + +rxhand_f *net_get_arp_handler(void) +{ + return arp_packet_handler; +} + +void net_set_arp_handler(rxhand_f *f) +{ + debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f); + if (f == NULL) + arp_packet_handler = dummy_handler; + else + arp_packet_handler = f; +} + +#ifdef CONFIG_CMD_TFTPPUT +void net_set_icmp_handler(rxhand_icmp_f *f) +{ + packet_icmp_handler = f; +} +#endif void -NetSetTimeout(ulong iv, thand_f * f) +NetSetTimeout(ulong iv, thand_f *f) { if (iv == 0) { + debug_cond(DEBUG_INT_STATE, + "--- NetLoop timeout handler cancelled\n"); timeHandler = (thand_f *)0; } else { + debug_cond(DEBUG_INT_STATE, + "--- NetLoop timeout handler set (%p)\n", f); 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) +int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, + int payload_len) { uchar *pkt; + int eth_hdr_size; + int pkt_hdr_size; + + /* make sure the NetTxPacket is initialized (NetInit() was called) */ + assert(NetTxPacket != NULL); + if (NetTxPacket == NULL) + return -1; /* convert to new style broadcast */ if (dest == 0) @@ -653,517 +676,274 @@ NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) if (dest == 0xFFFFFFFF) ether = NetBcastAddr; - /* if MAC address was not discovered yet, save the packet and do an ARP request */ + pkt = (uchar *)NetTxPacket; + + eth_hdr_size = NetSetEther(pkt, ether, PROT_IP); + pkt += eth_hdr_size; + net_set_udp_header(pkt, dest, dport, sport, payload_len); + pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; + + /* if MAC address was not discovered yet, do an ARP request */ if (memcmp(ether, NetEtherNullAddr, 6) == 0) { + debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); -#ifdef ET_DEBUG - printf("sending ARP for %08lx\n", dest); -#endif + /* save the ip and eth addr for the packet to send after arp */ 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; + NetArpWaitTxPacketSize = pkt_hdr_size + payload_len; /* and do the ARP request */ NetArpWaitTry = 1; NetArpWaitTimerStart = get_timer(0); ArpRequest(); return 1; /* waiting */ + } else { + debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", + &dest, ether); + NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len); + return 0; /* transmitted */ } - -#ifdef ET_DEBUG - printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", - dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); -#endif - - pkt = (uchar *)NetTxPacket; - pkt += NetSetEther (pkt, ether, PROT_IP); - NetSetIP (pkt, dest, dport, sport, len); - (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); - - return 0; /* transmitted */ } -#if defined(CONFIG_CMD_PING) -static ushort PingSeqNo; - -int PingSend(void) -{ - static uchar mac[6]; - volatile IP_t *ip; - volatile ushort *s; - uchar *pkt; - - /* XXX always send arp request */ - - memcpy(mac, NetEtherNullAddr, 6); - -#ifdef ET_DEBUG - printf("sending ARP for %08lx\n", NetPingIP); +#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)) - NetArpWaitPacketIP = NetPingIP; - NetArpWaitPacketMAC = mac; - - pkt = NetArpWaitTxPacket; - pkt += NetSetEther(pkt, mac, PROT_IP); +#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) - ip = (volatile IP_t *)pkt; +/* + * 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 struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp) +{ + static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); + static u16 first_hole, total_len; + struct hole *payload, *thisfrag, *h, *newh; + struct ip_udp_hdr *localip = (struct ip_udp_hdr *)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); + offset8 = (ip_off & IP_OFFS); + thisfrag = payload + offset8; + start = offset8 * 8; + len = ntohs(ip->ip_len) - IP_HDR_SIZE; + + 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); + } /* - * Construct an IP and ICMP header. (need to set no fragment bit - XXX) + * 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. */ - ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ - ip->ip_tos = 0; - ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); - ip->ip_id = htons(NetIPID++); - ip->ip_off = htons(0x4000); /* No fragmentation */ - ip->ip_ttl = 255; - ip->ip_p = 0x01; /* ICMP */ - ip->ip_sum = 0; - NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ - NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ - ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); - - s = &ip->udp_src; /* XXX ICMP starts here */ - s[0] = htons(0x0800); /* echo-request, code */ - s[1] = 0; /* checksum */ - s[2] = 0; /* identifier */ - s[3] = htons(PingSeqNo++); /* sequence number */ - s[1] = ~NetCksum((uchar *)s, 8/2); - - /* size of the waiting packet */ - NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; - - /* and do the ARP request */ - NetArpWaitTry = 1; - NetArpWaitTimerStart = get_timer(0); - ArpRequest(); - return 1; /* waiting */ -} -static void -PingTimeout (void) -{ - eth_halt(); - NetState = NETLOOP_FAIL; /* we did not get the reply */ -} - -static void -PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) -{ - IPaddr_t tmp; - volatile IP_t *ip = (volatile IP_t *)pkt; - - tmp = NetReadIP((void *)&ip->ip_src); - if (tmp != NetPingIP) - return; - - NetState = NETLOOP_SUCCESS; -} - -static void PingStart(void) -{ -#if defined(CONFIG_NET_MULTI) - printf ("Using %s device\n", eth_get_name()); -#endif /* CONFIG_NET_MULTI */ - NetSetTimeout (10 * CFG_HZ, PingTimeout); - NetSetHandler (PingHandler); - - PingSend(); -} -#endif - -#if defined(CONFIG_CMD_CDP) - -#define CDP_DEVICE_ID_TLV 0x0001 -#define CDP_ADDRESS_TLV 0x0002 -#define CDP_PORT_ID_TLV 0x0003 -#define CDP_CAPABILITIES_TLV 0x0004 -#define CDP_VERSION_TLV 0x0005 -#define CDP_PLATFORM_TLV 0x0006 -#define CDP_NATIVE_VLAN_TLV 0x000a -#define CDP_APPLIANCE_VLAN_TLV 0x000e -#define CDP_TRIGGER_TLV 0x000f -#define CDP_POWER_CONSUMPTION_TLV 0x0010 -#define CDP_SYSNAME_TLV 0x0014 -#define CDP_SYSOBJECT_TLV 0x0015 -#define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 - -#define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ - -static int CDPSeq; -static int CDPOK; - -ushort CDPNativeVLAN; -ushort CDPApplianceVLAN; - -static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; - -static ushort CDP_compute_csum(const uchar *buff, ushort len) -{ - ushort csum; - int odd; - ulong result = 0; - ushort leftover; - ushort *p; - - if (len > 0) { - odd = 1 & (ulong)buff; - if (odd) { - result = *buff << 8; - len--; - buff++; - } - while (len > 1) { - p = (ushort *)buff; - result += *p++; - buff = (uchar *)p; - if (result & 0x80000000) - result = (result & 0xFFFF) + (result >> 16); - len -= 2; - } - if (len) { - leftover = (signed short)(*(const signed char *)buff); - /* CISCO SUCKS big time! (and blows too): - * CDP uses the IP checksum algorithm with a twist; - * for the last byte it *sign* extends and sums. - */ - result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); + h = payload + first_hole; + while (h->last_byte < start) { + if (!h->next_hole) { + /* no hole that far away */ + return NULL; } - while (result >> 16) - result = (result & 0xFFFF) + (result >> 16); - - if (odd) - result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); + h = payload + h->next_hole; } - /* add up 16-bit and 17-bit words for 17+c bits */ - result = (result & 0xffff) + (result >> 16); - /* add up 16-bit and 2-bit for 16+c bit */ - result = (result & 0xffff) + (result >> 16); - /* add up carry.. */ - result = (result & 0xffff) + (result >> 16); - - /* negate */ - csum = ~(ushort)result; - - /* run time endian detection */ - if (csum != htons(csum)) /* little endian */ - csum = htons(csum); - - return csum; -} - -int CDPSendTrigger(void) -{ - volatile uchar *pkt; - volatile ushort *s; - volatile ushort *cp; - Ethernet_t *et; - int len; - ushort chksum; -#if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ - defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) - char buf[32]; -#endif - - pkt = NetTxPacket; - et = (Ethernet_t *)pkt; - - /* NOTE: trigger sent not on any VLAN */ - - /* form ethernet header */ - memcpy(et->et_dest, NetCDPAddr, 6); - memcpy(et->et_src, NetOurEther, 6); - - pkt += ETHER_HDR_SIZE; - - /* SNAP header */ - memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); - pkt += sizeof(CDP_SNAP_hdr); - - /* CDP header */ - *pkt++ = 0x02; /* CDP version 2 */ - *pkt++ = 180; /* TTL */ - s = (volatile ushort *)pkt; - cp = s; - *s++ = htons(0); /* checksum (0 for later calculation) */ - - /* CDP fields */ -#ifdef CONFIG_CDP_DEVICE_ID - *s++ = htons(CDP_DEVICE_ID_TLV); - *s++ = htons(CONFIG_CDP_DEVICE_ID); - memset(buf, 0, sizeof(buf)); - sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", - NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, - NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, - NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); - memcpy((uchar *)s, buf, 16); - s += 16 / 2; -#endif - -#ifdef CONFIG_CDP_PORT_ID - *s++ = htons(CDP_PORT_ID_TLV); - memset(buf, 0, sizeof(buf)); - sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); - len = strlen(buf); - if (len & 1) /* make it even */ - len++; - *s++ = htons(len + 4); - memcpy((uchar *)s, buf, len); - s += len / 2; -#endif - -#ifdef CONFIG_CDP_CAPABILITIES - *s++ = htons(CDP_CAPABILITIES_TLV); - *s++ = htons(8); - *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); - s += 2; -#endif + /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ + if (offset8 + ((len + 7) / 8) <= h - payload) { + /* no overlap with holes (dup fragment?) */ + return NULL; + } -#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 + if (!(ip_off & IP_FLAGS_MFRAG)) { + /* no more fragmentss: truncate this (last) hole */ + total_len = start + len; + h->last_byte = start + len; + } -#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 + /* + * 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). + */ -#ifdef CONFIG_CDP_TRIGGER - *s++ = htons(CDP_TRIGGER_TLV); - *s++ = htons(8); - *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); - s += 2; -#endif + 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; + } -#ifdef CONFIG_CDP_POWER_CONSUMPTION - *s++ = htons(CDP_POWER_CONSUMPTION_TLV); - *s++ = htons(6); - *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); -#endif + } 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); - /* length of ethernet packet */ - len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); - et->et_protlen = htons(len); + } 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); + } - 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); + /* finally copy this fragment and possibly return whole packet */ + memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); + if (!done) + return NULL; - (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); - return 0; + localip->ip_len = htons(total_len); + *lenp = total_len + IP_HDR_SIZE; + return localip; } -static void -CDPTimeout (void) +static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) { - CDPSeq++; - - if (CDPSeq < 3) { - NetSetTimeout (CDP_TIMEOUT, CDPTimeout); - CDPSendTrigger(); - return; - } - - /* if not OK try again */ - if (!CDPOK) - NetStartAgain(); - else - NetState = NETLOOP_SUCCESS; + u16 ip_off = ntohs(ip->ip_off); + if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) + return ip; /* not a fragment */ + return __NetDefragment(ip, lenp); } -static void -CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) +#else /* !CONFIG_IP_DEFRAG */ + +static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) { - /* nothing */ + u16 ip_off = ntohs(ip->ip_off); + if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) + return ip; /* not a fragment */ + return NULL; } +#endif -static void -CDPHandler(const uchar * pkt, unsigned len) +/** + * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently + * drop others. + * + * @parma ip IP packet containing the ICMP + */ +static void receive_icmp(struct ip_udp_hdr *ip, int len, + IPaddr_t src_ip, struct ethernet_hdr *et) { - 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; + struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; - 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 */ + switch (icmph->type) { + case ICMP_REDIRECT: + if (icmph->code != ICMP_REDIR_HOST) + return; + printf(" ICMP Host Redirect to %pI4 ", + &icmph->un.gateway); + break; + default: +#if defined(CONFIG_CMD_PING) + ping_receive(et, ip, len); #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()); +#ifdef CONFIG_CMD_TFTPPUT + if (packet_icmp_handler) + packet_icmp_handler(icmph->type, icmph->code, + ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), + icmph->un.data, ntohs(ip->udp_len)); #endif - CDPSeq = 0; - CDPOK = 0; - - CDPNativeVLAN = htons(-1); - CDPApplianceVLAN = htons(-1); - - NetSetTimeout (CDP_TIMEOUT, CDPTimeout); - NetSetHandler (CDPDummyHandler); - - CDPSendTrigger(); + break; + } } -#endif - void -NetReceive(volatile uchar * inpkt, int len) +NetReceive(uchar *inpkt, int len) { - Ethernet_t *et; - IP_t *ip; - ARP_t *arp; - IPaddr_t tmp; - int x; - uchar *pkt; + struct ethernet_hdr *et; + struct ip_udp_hdr *ip; + IPaddr_t dst_ip; + IPaddr_t src_ip; + int eth_proto; #if defined(CONFIG_CMD_CDP) int iscdp; #endif ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; -#ifdef ET_DEBUG - printf("packet received\n"); -#endif + debug_cond(DEBUG_NET_PKT, "packet received\n"); - NetRxPkt = inpkt; - NetRxPktLen = len; - et = (Ethernet_t *)inpkt; + NetRxPacket = inpkt; + NetRxPacketLen = len; + et = (struct ethernet_hdr *)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; + iscdp = is_cdp_packet(et->et_dest); #endif myvlanid = ntohs(NetOurVLAN); @@ -1173,31 +953,29 @@ NetReceive(volatile uchar * inpkt, int len) if (mynvlanid == (ushort)-1) mynvlanid = VLAN_NONE; - x = ntohs(et->et_protlen); + eth_proto = ntohs(et->et_protlen); -#ifdef ET_DEBUG - printf("packet received\n"); -#endif - - if (x < 1514) { + if (eth_proto < 1514) { + struct e802_hdr *et802 = (struct e802_hdr *)et; /* - * Got a 802 packet. Check the other protocol field. + * Got a 802.2 packet. Check the other protocol field. + * XXX VLAN over 802.2+SNAP not implemented! */ - x = ntohs(et->et_prot); + eth_proto = ntohs(et802->et_prot); - ip = (IP_t *)(inpkt + E802_HDR_SIZE); + ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE); len -= E802_HDR_SIZE; - } else if (x != PROT_VLAN) { /* normal packet */ - ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); + } else if (eth_proto != PROT_VLAN) { /* normal packet */ + ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE); len -= ETHER_HDR_SIZE; } else { /* VLAN packet */ - VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; + struct vlan_ethernet_hdr *vet = + (struct vlan_ethernet_hdr *)et; + + debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); -#ifdef ET_DEBUG - printf("VLAN packet received\n"); -#endif /* too small packet? */ if (len < VLAN_ETHER_HDR_SIZE) return; @@ -1212,19 +990,17 @@ NetReceive(volatile uchar * inpkt, int len) cti = ntohs(vet->vet_tag); vlanid = cti & VLAN_IDMASK; - x = ntohs(vet->vet_type); + eth_proto = ntohs(vet->vet_type); - ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); + ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE); len -= VLAN_ETHER_HDR_SIZE; } -#ifdef ET_DEBUG - printf("Receive from protocol 0x%x\n", x); -#endif + debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); #if defined(CONFIG_CMD_CDP) if (iscdp) { - CDPHandler((uchar *)ip, len); + cdp_receive((uchar *)ip, len); return; } #endif @@ -1237,164 +1013,63 @@ NetReceive(volatile uchar * inpkt, int len) return; } - switch (x) { + switch (eth_proto) { case PROT_ARP: - /* - * We have to deal with two types of ARP packets: - * - REQUEST packets will be answered by sending our - * IP address - if we know it. - * - REPLY packates are expected only after we asked - * for the TFTP server's or the gateway's ethernet - * address; so if we receive such a packet, we set - * the server ethernet address - */ -#ifdef ET_DEBUG - puts ("Got ARP\n"); -#endif - arp = (ARP_t *)ip; - if (len < ARP_HDR_SIZE) { - printf("bad length %d < %d\n", len, ARP_HDR_SIZE); - return; - } - if (ntohs(arp->ar_hrd) != ARP_ETHER) { - return; - } - if (ntohs(arp->ar_pro) != PROT_IP) { - return; - } - if (arp->ar_hln != 6) { - return; - } - if (arp->ar_pln != 4) { - return; - } - - if (NetOurIP == 0) { - return; - } - - if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { - return; - } - - switch (ntohs(arp->ar_op)) { - case ARPOP_REQUEST: /* reply with our IP address */ -#ifdef ET_DEBUG - puts ("Got ARP REQUEST, return our IP\n"); -#endif - pkt = (uchar *)et; - pkt += NetSetEther(pkt, et->et_src, PROT_ARP); - arp->ar_op = htons(ARPOP_REPLY); - memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); - NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); - memcpy (&arp->ar_data[ 0], NetOurEther, 6); - NetCopyIP(&arp->ar_data[ 6], &NetOurIP); - (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); - return; - - case ARPOP_REPLY: /* arp reply */ - /* are we waiting for a reply */ - if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) - break; -#ifdef ET_DEBUG - printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", - arp->ar_data[0], arp->ar_data[1], - arp->ar_data[2], arp->ar_data[3], - arp->ar_data[4], arp->ar_data[5]); -#endif - - tmp = NetReadIP(&arp->ar_data[6]); - - /* matched waiting packet's address */ - if (tmp == NetArpWaitReplyIP) { -#ifdef ET_DEBUG - puts ("Got it\n"); -#endif - /* save address for later use */ - memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); - -#ifdef CONFIG_NETCONSOLE - (*packetHandler)(0,0,0,0); -#endif - /* modify header, and transmit it */ - memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); - (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); - - /* no arp request pending now */ - NetArpWaitPacketIP = 0; - NetArpWaitTxPacketSize = 0; - NetArpWaitPacketMAC = NULL; - - } - return; - default: -#ifdef ET_DEBUG - printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); -#endif - return; - } + ArpReceive(et, ip, len); break; +#ifdef CONFIG_CMD_RARP 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); - } + rarp_receive(ip, len); 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); + case PROT_IP: + debug_cond(DEBUG_NET_PKT, "Got IP\n"); + /* Before we start poking the header, make sure it is there */ + if (len < IP_UDP_HDR_SIZE) { + debug("len bad %d < %lu\n", len, + (ulong)IP_UDP_HDR_SIZE); return; } + /* Check the packet length */ if (len < ntohs(ip->ip_len)) { - printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); + debug("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) { + debug_cond(DEBUG_NET_PKT, "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; - } - if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ + /* Can't deal with IP options (headers != 20 bytes) */ + if ((ip->ip_hl_v & 0x0f) > 0x05) return; - } - if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { - puts ("checksum bad\n"); + /* Check the Checksum of the header */ + if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) { + debug("checksum bad\n"); return; } - tmp = NetReadIP(&ip->ip_dst); - if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { + /* If it is not for us, ignore it */ + dst_ip = NetReadIP(&ip->ip_dst); + if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) { #ifdef CONFIG_MCAST_TFTP - if (Mcast_addr != tmp) + if (Mcast_addr != dst_ip) #endif - return; + return; } + /* Read source IP address for later use */ + src_ip = NetReadIP(&ip->ip_src); + /* + * 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) + */ + ip = NetDefragment(ip, &len); + if (!ip) + return; /* * watch for ICMP host redirects * @@ -1411,54 +1086,22 @@ NetReceive(volatile uchar * inpkt, int len) * 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. + * + * Simon Glass : We get an ICMP when + * we send a tftp packet to a dead connection, or when + * there is no server at the other end. */ if (ip->ip_p == IPPROTO_ICMP) { - ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); - - switch (icmph->type) { - case ICMP_REDIRECT: - if (icmph->code != ICMP_REDIR_HOST) - return; - puts (" ICMP Host Redirect to "); - print_IPaddr(icmph->un.gateway); - putc(' '); - return; -#if defined(CONFIG_CMD_PING) - case ICMP_ECHO_REPLY: - /* - * IP header OK. Pass the packet to the current handler. - */ - /* XXX point to ip packet */ - (*packetHandler)((uchar *)ip, 0, 0, 0); - return; - case ICMP_ECHO_REQUEST: -#ifdef ET_DEBUG - printf ("Got ICMP ECHO REQUEST, return %d bytes \n", - ETHER_HDR_SIZE + len); -#endif - memcpy (&et->et_dest[0], &et->et_src[0], 6); - memcpy (&et->et_src[ 0], NetOurEther, 6); - - ip->ip_sum = 0; - ip->ip_off = 0; - NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); - NetCopyIP((void*)&ip->ip_src, &NetOurIP); - ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); - - icmph->type = ICMP_ECHO_REPLY; - icmph->checksum = 0; - icmph->checksum = ~NetCksum((uchar *)icmph, - (len - IP_HDR_SIZE_NO_UDP) >> 1); - (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); - return; -#endif - default: - return; - } + receive_icmp(ip, len, src_ip, et); + return; } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ return; } + debug_cond(DEBUG_DEV_PKT, + "received UDP (to=%pI4, from=%pI4, len=%d)\n", + &dst_ip, &src_ip, len); + #ifdef CONFIG_UDP_CHECKSUM if (ip->udp_xsum != 0) { ulong xsum; @@ -1490,10 +1133,12 @@ NetReceive(volatile uchar * inpkt, int len) xsum += sumdata; } while ((xsum >> 16) != 0) { - xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); + xsum = (xsum & 0x0000ffff) + + ((xsum >> 16) & 0x0000ffff); } if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { - printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); + printf(" UDP wrong checksum %08lx %08x\n", + xsum, ntohs(ip->udp_xsum)); return; } } @@ -1501,18 +1146,19 @@ NetReceive(volatile uchar * inpkt, int len) #ifdef CONFIG_NETCONSOLE - nc_input_packet((uchar *)ip +IP_HDR_SIZE, - ntohs(ip->udp_dst), - ntohs(ip->udp_src), - ntohs(ip->udp_len) - 8); + nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, + ntohs(ip->udp_dst), + ntohs(ip->udp_src), + ntohs(ip->udp_len) - UDP_HDR_SIZE); #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); + (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, + ntohs(ip->udp_dst), + src_ip, + ntohs(ip->udp_src), + ntohs(ip->udp_len) - UDP_HDR_SIZE); break; } } @@ -1520,91 +1166,100 @@ NetReceive(volatile uchar * inpkt, int len) /**********************************************************************/ -static int net_check_prereq (proto_t protocol) +static int net_check_prereq(enum 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); + 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); + 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: + case TFTPGET: + case TFTPPUT: if (NetServerIP == 0) { - puts ("*** ERROR: `serverip' not set\n"); - return (1); + puts("*** ERROR: `serverip' not set\n"); + return 1; } -#if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) - common: +#if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ + defined(CONFIG_CMD_DNS) +common: #endif + /* Fall through */ + case NETCONS: + case TFTPSRV: if (NetOurIP == 0) { - puts ("*** ERROR: `ipaddr' not set\n"); - return (1); + puts("*** ERROR: `ipaddr' not set\n"); + return 1; } /* Fall through */ - case DHCP: +#ifdef CONFIG_CMD_RARP case RARP: +#endif 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 (); + case DHCP: + case LINKLOCAL: + if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { + int num = eth_get_dev_index(); switch (num) { case -1: - puts ("*** ERROR: No ethernet found.\n"); - return (1); + puts("*** ERROR: No ethernet found.\n"); + return 1; case 0: - puts ("*** ERROR: `ethaddr' not set\n"); + puts("*** ERROR: `ethaddr' not set\n"); break; default: - printf ("*** ERROR: `eth%daddr' not set\n", + printf("*** ERROR: `eth%daddr' not set\n", num); break; } - NetStartAgain (); - return (2); -#else - puts ("*** ERROR: `ethaddr' not set\n"); - return (1); -#endif + NetStartAgain(); + return 2; } /* Fall through */ default: - return (0); + return 0; } - return (0); /* OK */ + return 0; /* OK */ } /**********************************************************************/ int -NetCksumOk(uchar * ptr, int len) +NetCksumOk(uchar *ptr, int len) { return !((NetCksum(ptr, len) + 1) & 0xfffe); } unsigned -NetCksum(uchar * ptr, int len) +NetCksum(uchar *ptr, int len) { ulong xsum; ushort *p = (ushort *)ptr; @@ -1614,7 +1269,7 @@ NetCksum(uchar * ptr, int len) xsum += *p++; xsum = (xsum & 0xffff) + (xsum >> 16); xsum = (xsum & 0xffff) + (xsum >> 16); - return (xsum & 0xffff); + return xsum & 0xffff; } int @@ -1626,26 +1281,28 @@ NetEthHdrSize(void) if (myvlanid == (ushort)-1) myvlanid = VLAN_NONE; - return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; + return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : + VLAN_ETHER_HDR_SIZE; } int -NetSetEther(volatile uchar * xet, uchar * addr, uint prot) +NetSetEther(uchar *xet, uchar * addr, uint prot) { - Ethernet_t *et = (Ethernet_t *)xet; + struct ethernet_hdr *et = (struct ethernet_hdr *)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); + memcpy(et->et_dest, addr, 6); + memcpy(et->et_src, NetOurEther, 6); if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { - et->et_protlen = htons(prot); + et->et_protlen = htons(prot); return ETHER_HDR_SIZE; } else { - VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; + struct vlan_ethernet_hdr *vet = + (struct vlan_ethernet_hdr *)xet; vet->vet_vlan_type = htons(PROT_VLAN); vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); @@ -1654,84 +1311,108 @@ NetSetEther(volatile uchar * xet, uchar * addr, uint prot) } } -void -NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) +int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) { - volatile IP_t *ip = (IP_t *)xip; + ushort protlen; - /* - * 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; + memcpy(et->et_dest, addr, 6); + memcpy(et->et_src, NetOurEther, 6); + protlen = ntohs(et->et_protlen); + if (protlen == PROT_VLAN) { + struct vlan_ethernet_hdr *vet = + (struct vlan_ethernet_hdr *)et; + vet->vet_type = htons(prot); + return VLAN_ETHER_HDR_SIZE; + } else if (protlen > 1514) { + et->et_protlen = htons(prot); + return ETHER_HDR_SIZE; + } else { + /* 802.2 + SNAP */ + struct e802_hdr *et802 = (struct e802_hdr *)et; + et802->et_prot = htons(prot); + return E802_HDR_SIZE; + } +} + +void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source) +{ + struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; /* - * Construct an IP and UDP header. - * (need to set no fragment bit - XXX) + * Construct an IP header. */ - ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ + /* IP_HDR_SIZE / 4 (not including UDP) */ + ip->ip_hl_v = 0x45; ip->ip_tos = 0; - ip->ip_len = htons(IP_HDR_SIZE + len); + ip->ip_len = htons(IP_HDR_SIZE); ip->ip_id = htons(NetIPID++); - ip->ip_off = htons(0x4000); /* No fragmentation */ + 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); /* - "" - */ + /* already in network byte order */ + NetCopyIP((void *)&ip->ip_src, &source); + /* already in network byte order */ + NetCopyIP((void *)&ip->ip_dst, &dest); +} + +void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport, + int len) +{ + struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; + + /* + * 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) + pkt[IP_UDP_HDR_SIZE + len] = 0; + + net_set_ip_header(pkt, dest, NetOurIP); + ip->ip_len = htons(IP_UDP_HDR_SIZE + len); + ip->ip_p = IPPROTO_UDP; + ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1); + ip->udp_src = htons(sport); ip->udp_dst = htons(dport); - ip->udp_len = htons(8 + len); + ip->udp_len = htons(UDP_HDR_SIZE + 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) +void copy_filename(char *dst, const char *src, int size) { if (*src && (*src == '"')) { ++src; --size; } - while ((--size > 0) && *src && (*src != '"')) { + while ((--size > 0) && *src && (*src != '"')) *dst++ = *src++; - } *dst = '\0'; } -#endif - -void ip_to_string (IPaddr_t x, char *s) +#if defined(CONFIG_CMD_NFS) || \ + defined(CONFIG_CMD_SNTP) || \ + defined(CONFIG_CMD_DNS) +/* + * make port a little random (1024-17407) + * This keeps the math somewhat trivial to compute, and seems to work with + * all supported protocols/clients/servers + */ +unsigned int random_port(void) { - 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 1024 + (get_timer(0) % 0x4000); } +#endif -IPaddr_t string_to_ip(char *s) +void ip_to_string(IPaddr_t x, 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)); + x = ntohl(x); + sprintf(s, "%d.%d.%d.%d", + (int) ((x >> 24) & 0xff), + (int) ((x >> 16) & 0xff), + (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) + ); } void VLAN_to_string(ushort x, char *s) @@ -1747,7 +1428,7 @@ void VLAN_to_string(ushort x, char *s) sprintf(s, "%d", x & VLAN_IDMASK); } -ushort string_to_VLAN(char *s) +ushort string_to_VLAN(const char *s) { ushort id; @@ -1762,21 +1443,7 @@ ushort string_to_VLAN(char *s) return htons(id); } -void print_IPaddr (IPaddr_t x) -{ - char tmp[16]; - - ip_to_string (x, tmp); - - puts (tmp); -} - -IPaddr_t getenv_IPaddr (char *var) -{ - return (string_to_ip(getenv(var))); -} - ushort getenv_VLAN(char *var) { - return (string_to_VLAN(getenv(var))); + return string_to_VLAN(getenv(var)); }