| /* |
| * 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 <linux/compiler.h> |
| #include <net.h> |
| #include "arp.h" |
| #include "bootp.h" |
| #include "tftp.h" |
| #ifdef CONFIG_CMD_RARP |
| #include "rarp.h" |
| #endif |
| #include "nfs.h" |
| #ifdef CONFIG_STATUS_LED |
| #include <status_led.h> |
| #include <miiphy.h> |
| #endif |
| #if defined(CONFIG_CMD_SNTP) |
| #include "sntp.h" |
| #endif |
| #include "cdp.h" |
| #if defined(CONFIG_CMD_DNS) |
| #include "dns.h" |
| #endif |
| #include "ping.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| /** BOOTP EXTENTIONS **/ |
| |
| /* 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) |
| /* 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; |
| #endif |
| |
| /** END OF BOOTP EXTENTIONS **/ |
| |
| /* 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 */ |
| int NetState; |
| /* 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) */ |
| /* default is without VLAN */ |
| ushort NetOurVLAN = 0xFFFF; |
| /* ditto */ |
| ushort NetOurNativeVLAN = 0xFFFF; |
| |
| /* Boot File name */ |
| char BootFile[128]; |
| |
| #if defined(CONFIG_CMD_SNTP) |
| /* NTP server IP address */ |
| IPaddr_t NetNtpServerIP; |
| /* offset time from UTC */ |
| int NetTimeOffset; |
| #endif |
| |
| uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; |
| |
| /* Receive packet */ |
| uchar *NetRxPackets[PKTBUFSRX]; |
| |
| /* Current RX packet handler */ |
| static rxhand_f *packetHandler; |
| #ifdef CONFIG_CMD_TFTPPUT |
| static rxhand_icmp_f *packet_icmp_handler; /* Current ICMP rx 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 int net_check_prereq(enum proto_t protocol); |
| |
| static int NetTryCount; |
| |
| /**********************************************************************/ |
| |
| /* |
| * Check if autoload is enabled. If so, use either NFS or TFTP to download |
| * the boot file. |
| */ |
| void net_auto_load(void) |
| { |
| const char *s = getenv("autoload"); |
| |
| if (s != NULL) { |
| if (*s == 'n') { |
| /* |
| * Just use BOOTP/RARP to configure system; |
| * Do not use TFTP to load the bootfile. |
| */ |
| NetState = NETLOOP_SUCCESS; |
| return; |
| } |
| #if defined(CONFIG_CMD_NFS) |
| if (strcmp(s, "NFS") == 0) { |
| /* |
| * Use NFS to load the bootfile. |
| */ |
| NfsStart(); |
| return; |
| } |
| #endif |
| } |
| TftpStart(TFTPGET); |
| } |
| |
| static void NetInitLoop(enum proto_t protocol) |
| { |
| 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; |
| } |
| |
| return; |
| } |
| |
| /**********************************************************************/ |
| /* |
| * Main network processing loop. |
| */ |
| |
| int NetLoop(enum proto_t protocol) |
| { |
| bd_t *bd = gd->bd; |
| int ret = -1; |
| |
| NetRestarted = 0; |
| NetDevExists = 0; |
| |
| NetTxPacket = NULL; |
| NetTryCount = 1; |
| |
| ArpInit(); |
| |
| 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; |
| } |
| |
| bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); |
| eth_halt(); |
| eth_set_current(); |
| if (eth_init(bd) < 0) { |
| eth_halt(); |
| return -1; |
| } |
| |
| restart: |
| memcpy(NetOurEther, eth_get_dev()->enetaddr, 6); |
| |
| 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; |
| |
| case 2: |
| /* network device not configured */ |
| break; |
| |
| case 0: |
| NetDevExists = 1; |
| NetBootFileXferSize = 0; |
| switch (protocol) { |
| case TFTPGET: |
| #ifdef CONFIG_CMD_TFTPPUT |
| case TFTPPUT: |
| #endif |
| /* always use ARP to get server ethernet address */ |
| TftpStart(protocol); |
| break; |
| #ifdef CONFIG_CMD_TFTPSRV |
| case TFTPSRV: |
| TftpStartServer(); |
| break; |
| #endif |
| #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; |
| |
| #if defined(CONFIG_CMD_RARP) |
| case RARP: |
| RarpTry = 0; |
| NetOurIP = 0; |
| RarpRequest(); |
| break; |
| #endif |
| #if defined(CONFIG_CMD_PING) |
| case PING: |
| ping_start(); |
| 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; |
| } |
| |
| 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 |
| 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"); |
| goto done; |
| } |
| |
| 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: |
| NetRestarted = 1; |
| 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(); |
| ret = NetBootFileXferSize; |
| goto done; |
| |
| case NETLOOP_FAIL: |
| goto done; |
| } |
| } |
| |
| done: |
| #ifdef CONFIG_CMD_TFTPPUT |
| /* Clear out the handlers */ |
| NetSetHandler(NULL); |
| net_set_icmp_handler(NULL); |
| #endif |
| return ret; |
| } |
| |
| /**********************************************************************/ |
| |
| static void |
| startAgainTimeout(void) |
| { |
| NetState = NETLOOP_RESTART; |
| } |
| |
| static void |
| startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip, |
| unsigned src, unsigned len) |
| { |
| /* Totally ignore the packet */ |
| } |
| |
| void NetStartAgain(void) |
| { |
| char *nretry; |
| int retry_forever = 0; |
| unsigned long retrycnt = 0; |
| |
| nretry = getenv("netretry"); |
| if (nretry) { |
| if (!strcmp(nretry, "yes")) |
| retry_forever = 1; |
| else if (!strcmp(nretry, "no")) |
| retrycnt = 0; |
| else if (!strcmp(nretry, "once")) |
| retrycnt = 1; |
| else |
| retrycnt = simple_strtoul(nretry, NULL, 0); |
| } else |
| retry_forever = 1; |
| |
| if ((!retry_forever) && (NetTryCount >= retrycnt)) { |
| eth_halt(); |
| NetState = NETLOOP_FAIL; |
| return; |
| } |
| |
| NetTryCount++; |
| |
| eth_halt(); |
| #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) |
| eth_try_another(!NetRestarted); |
| #endif |
| eth_init(gd->bd); |
| if (NetRestartWrap) { |
| NetRestartWrap = 0; |
| if (NetDevExists) { |
| NetSetTimeout(10000UL, startAgainTimeout); |
| NetSetHandler(startAgainHandler); |
| } else { |
| NetState = NETLOOP_FAIL; |
| } |
| } else { |
| NetState = NETLOOP_RESTART; |
| } |
| } |
| |
| /**********************************************************************/ |
| /* |
| * Miscelaneous bits. |
| */ |
| |
| rxhand_f * |
| NetGetHandler(void) |
| { |
| return packetHandler; |
| } |
| |
| |
| void |
| NetSetHandler(rxhand_f *f) |
| { |
| packetHandler = 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) |
| { |
| if (iv == 0) { |
| timeHandler = (thand_f *)0; |
| } else { |
| timeHandler = f; |
| timeStart = get_timer(0); |
| timeDelta = iv; |
| } |
| } |
| |
| |
| void |
| NetSendPacket(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 %08x\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 %08x/%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 */ |
| } |
| |
| #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] __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; |
| } |
| |
| /* 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; |
| } |
| |
| 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 |
| |
| /** |
| * 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(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et) |
| { |
| 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); |
| break; |
| default: |
| #if defined(CONFIG_CMD_PING) |
| ping_receive(et, ip, len); |
| #endif |
| #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 |
| break; |
| } |
| } |
| |
| void |
| NetReceive(uchar *inpkt, int len) |
| { |
| Ethernet_t *et; |
| IP_t *ip; |
| #ifdef CONFIG_CMD_RARP |
| ARP_t *arp; |
| #endif |
| IPaddr_t tmp; |
| IPaddr_t src_ip; |
| int x; |
| #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 = is_cdp_packet(et->et_dest); |
| #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: |
| ArpReceive(et, ip, len); |
| break; |
| |
| #ifdef CONFIG_CMD_RARP |
| 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, 0); |
| } |
| break; |
| #endif |
| 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; |
| } |
| /* 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 |
| * |
| * 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. |
| * |
| * Simon Glass <sjg@chromium.org>: 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) { |
| receive_icmp(ip, len, src_ip, et); |
| 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), |
| src_ip, |
| ntohs(ip->udp_src), |
| ntohs(ip->udp_len) - 8); |
| break; |
| } |
| } |
| |
| |
| /**********************************************************************/ |
| |
| 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; |
| } |
| 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 TFTPGET: |
| case TFTPPUT: |
| if (NetServerIP == 0) { |
| puts("*** ERROR: `serverip' not set\n"); |
| return 1; |
| } |
| #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; |
| } |
| /* Fall through */ |
| |
| #ifdef CONFIG_CMD_RARP |
| case RARP: |
| #endif |
| case BOOTP: |
| case CDP: |
| case DHCP: |
| 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; |
| case 0: |
| puts("*** ERROR: `ethaddr' not set\n"); |
| break; |
| default: |
| printf("*** ERROR: `eth%daddr' not set\n", |
| num); |
| break; |
| } |
| |
| NetStartAgain(); |
| return 2; |
| } |
| /* 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(uchar *xet, uchar * addr, uint prot) |
| { |
| Ethernet_t *et = (Ethernet_t *)xet; |
| ushort myvlanid; |
| |
| myvlanid = ntohs(NetOurVLAN); |
| if (myvlanid == (ushort)-1) |
| myvlanid = VLAN_NONE; |
| |
| memcpy(et->et_dest, addr, 6); |
| memcpy(et->et_src, NetOurEther, 6); |
| if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { |
| et->et_protlen = htons(prot); |
| return ETHER_HDR_SIZE; |
| } else { |
| VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; |
| |
| vet->vet_vlan_type = htons(PROT_VLAN); |
| vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); |
| vet->vet_type = htons(prot); |
| return VLAN_ETHER_HDR_SIZE; |
| } |
| } |
| |
| void |
| NetSetIP(uchar *xip, IPaddr_t dest, int dport, int sport, int len) |
| { |
| IP_t *ip = (IP_t *)xip; |
| |
| /* |
| * If the data is an odd number of bytes, zero the |
| * byte after the last byte so that the checksum |
| * will work. |
| */ |
| if (len & 1) |
| xip[IP_HDR_SIZE + len] = 0; |
| |
| /* |
| * Construct an IP and UDP header. |
| * (need to set no fragment bit - XXX) |
| */ |
| /* IP_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_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; |
| /* already in network byte order */ |
| NetCopyIP((void *)&ip->ip_src, &NetOurIP); |
| /* - "" - */ |
| 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, const char *src, int size) |
| { |
| if (*src && (*src == '"')) { |
| ++src; |
| --size; |
| } |
| |
| while ((--size > 0) && *src && (*src != '"')) |
| *dst++ = *src++; |
| *dst = '\0'; |
| } |
| |
| #if defined(CONFIG_CMD_NFS) || \ |
| defined(CONFIG_CMD_SNTP) || \ |
| defined(CONFIG_CMD_DNS) |
| /* |
| * make port a little random (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) |
| { |
| return 1024 + (get_timer(0) % 0x4000); |
| } |
| #endif |
| |
| void ip_to_string(IPaddr_t x, char *s) |
| { |
| x = ntohl(x); |
| sprintf(s, "%d.%d.%d.%d", |
| (int) ((x >> 24) & 0xff), |
| (int) ((x >> 16) & 0xff), |
| (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) |
| ); |
| } |
| |
| void VLAN_to_string(ushort x, char *s) |
| { |
| x = ntohs(x); |
| |
| if (x == (ushort)-1) |
| x = VLAN_NONE; |
| |
| if (x == VLAN_NONE) |
| strcpy(s, "none"); |
| else |
| sprintf(s, "%d", x & VLAN_IDMASK); |
| } |
| |
| ushort string_to_VLAN(const char *s) |
| { |
| ushort id; |
| |
| if (s == NULL) |
| return htons(VLAN_NONE); |
| |
| if (*s < '0' || *s > '9') |
| id = VLAN_NONE; |
| else |
| id = (ushort)simple_strtoul(s, NULL, 10); |
| |
| return htons(id); |
| } |
| |
| ushort getenv_VLAN(char *var) |
| { |
| return string_to_VLAN(getenv(var)); |
| } |