diff options
Diffstat (limited to 'net/tftp.c')
| -rw-r--r-- | net/tftp.c | 946 |
1 files changed, 946 insertions, 0 deletions
diff --git a/net/tftp.c b/net/tftp.c new file mode 100644 index 0000000..6d333d5 --- /dev/null +++ b/net/tftp.c @@ -0,0 +1,946 @@ +/* + * Copyright 1994, 1995, 2000 Neil Russell. + * (See License) + * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de + * Copyright 2011 Comelit Group SpA, + * Luca Ceresoli <luca.ceresoli@comelit.it> + */ + +#include <common.h> +#include <command.h> +#include <net.h> +#include "tftp.h" +#include "bootp.h" +#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP +#include <flash.h> +#endif + +/* Well known TFTP port # */ +#define WELL_KNOWN_PORT 69 +/* Millisecs to timeout for lost pkt */ +#define TIMEOUT 5000UL +#ifndef CONFIG_NET_RETRY_COUNT +/* # of timeouts before giving up */ +# define TIMEOUT_COUNT 10 +#else +# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2) +#endif +/* Number of "loading" hashes per line (for checking the image size) */ +#define HASHES_PER_LINE 65 + +/* + * TFTP operations. + */ +#define TFTP_RRQ 1 +#define TFTP_WRQ 2 +#define TFTP_DATA 3 +#define TFTP_ACK 4 +#define TFTP_ERROR 5 +#define TFTP_OACK 6 + +static ulong TftpTimeoutMSecs = TIMEOUT; +static int TftpTimeoutCountMax = TIMEOUT_COUNT; +static ulong time_start; /* Record time we started tftp */ + +/* + * These globals govern the timeout behavior when attempting a connection to a + * TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to + * wait for the server to respond to initial connection. Second global, + * TftpRRQTimeoutCountMax, gives the number of such connection retries. + * TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be + * positive. The globals are meant to be set (and restored) by code needing + * non-standard timeout behavior when initiating a TFTP transfer. + */ +ulong TftpRRQTimeoutMSecs = TIMEOUT; +int TftpRRQTimeoutCountMax = TIMEOUT_COUNT; + +enum { + TFTP_ERR_UNDEFINED = 0, + TFTP_ERR_FILE_NOT_FOUND = 1, + TFTP_ERR_ACCESS_DENIED = 2, + TFTP_ERR_DISK_FULL = 3, + TFTP_ERR_UNEXPECTED_OPCODE = 4, + TFTP_ERR_UNKNOWN_TRANSFER_ID = 5, + TFTP_ERR_FILE_ALREADY_EXISTS = 6, +}; + +static IPaddr_t TftpRemoteIP; +/* The UDP port at their end */ +static int TftpRemotePort; +/* The UDP port at our end */ +static int TftpOurPort; +static int TftpTimeoutCount; +/* packet sequence number */ +static ulong TftpBlock; +/* last packet sequence number received */ +static ulong TftpLastBlock; +/* count of sequence number wraparounds */ +static ulong TftpBlockWrap; +/* memory offset due to wrapping */ +static ulong TftpBlockWrapOffset; +static int TftpState; +#ifdef CONFIG_TFTP_TSIZE +/* The file size reported by the server */ +static int TftpTsize; +/* The number of hashes we printed */ +static short TftpNumchars; +#endif +#ifdef CONFIG_CMD_TFTPPUT +static int TftpWriting; /* 1 if writing, else 0 */ +static int TftpFinalBlock; /* 1 if we have sent the last block */ +#else +#define TftpWriting 0 +#endif + +#define STATE_SEND_RRQ 1 +#define STATE_DATA 2 +#define STATE_TOO_LARGE 3 +#define STATE_BAD_MAGIC 4 +#define STATE_OACK 5 +#define STATE_RECV_WRQ 6 +#define STATE_SEND_WRQ 7 + +/* default TFTP block size */ +#define TFTP_BLOCK_SIZE 512 +/* sequence number is 16 bit */ +#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) + +#define DEFAULT_NAME_LEN (8 + 4 + 1) +static char default_filename[DEFAULT_NAME_LEN]; + +#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN +#define MAX_LEN 128 +#else +#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN +#endif + +static char tftp_filename[MAX_LEN]; + +/* 512 is poor choice for ethernet, MTU is typically 1500. + * Minus eth.hdrs thats 1468. Can get 2x better throughput with + * almost-MTU block sizes. At least try... fall back to 512 if need be. + * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file) + */ +#ifdef CONFIG_TFTP_BLOCKSIZE +#define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE +#else +#define TFTP_MTU_BLOCKSIZE 1468 +#endif + +static unsigned short TftpBlkSize = TFTP_BLOCK_SIZE; +static unsigned short TftpBlkSizeOption = TFTP_MTU_BLOCKSIZE; + +#ifdef CONFIG_MCAST_TFTP +#include <malloc.h> +#define MTFTP_BITMAPSIZE 0x1000 +static unsigned *Bitmap; +static int PrevBitmapHole, Mapsize = MTFTP_BITMAPSIZE; +static uchar ProhibitMcast, MasterClient; +static uchar Multicast; +static int Mcast_port; +static ulong TftpEndingBlock; /* can get 'last' block before done..*/ + +static void parse_multicast_oack(char *pkt, int len); + +static void +mcast_cleanup(void) +{ + if (Mcast_addr) + eth_mcast_join(Mcast_addr, 0); + if (Bitmap) + free(Bitmap); + Bitmap = NULL; + Mcast_addr = Multicast = Mcast_port = 0; + TftpEndingBlock = -1; +} + +#endif /* CONFIG_MCAST_TFTP */ + +static inline void +store_block(int block, uchar *src, unsigned len) +{ + ulong offset = block * TftpBlkSize + TftpBlockWrapOffset; + ulong newsize = offset + len; +#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP + int i, rc = 0; + + for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { + /* start address in flash? */ + if (flash_info[i].flash_id == FLASH_UNKNOWN) + continue; + if (load_addr + offset >= flash_info[i].start[0]) { + rc = 1; + break; + } + } + + if (rc) { /* Flash is destination for this packet */ + rc = flash_write((char *)src, (ulong)(load_addr+offset), len); + if (rc) { + flash_perror(rc); + net_set_state(NETLOOP_FAIL); + return; + } + } else +#endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */ + { + (void)memcpy((void *)(load_addr + offset), src, len); + } +#ifdef CONFIG_MCAST_TFTP + if (Multicast) + ext2_set_bit(block, Bitmap); +#endif + + if (NetBootFileXferSize < newsize) + NetBootFileXferSize = newsize; +} + +/* Clear our state ready for a new transfer */ +static void new_transfer(void) +{ + TftpLastBlock = 0; + TftpBlockWrap = 0; + TftpBlockWrapOffset = 0; +#ifdef CONFIG_CMD_TFTPPUT + TftpFinalBlock = 0; +#endif +} + +#ifdef CONFIG_CMD_TFTPPUT +/** + * Load the next block from memory to be sent over tftp. + * + * @param block Block number to send + * @param dst Destination buffer for data + * @param len Number of bytes in block (this one and every other) + * @return number of bytes loaded + */ +static int load_block(unsigned block, uchar *dst, unsigned len) +{ + /* We may want to get the final block from the previous set */ + ulong offset = ((int)block - 1) * len + TftpBlockWrapOffset; + ulong tosend = len; + + tosend = min(NetBootFileXferSize - offset, tosend); + (void)memcpy(dst, (void *)(save_addr + offset), tosend); + debug("%s: block=%d, offset=%ld, len=%d, tosend=%ld\n", __func__, + block, offset, len, tosend); + return tosend; +} +#endif + +static void TftpSend(void); +static void TftpTimeout(void); + +/**********************************************************************/ + +static void show_block_marker(void) +{ +#ifdef CONFIG_TFTP_TSIZE + if (TftpTsize) { + ulong pos = TftpBlock * TftpBlkSize + TftpBlockWrapOffset; + + while (TftpNumchars < pos * 50 / TftpTsize) { + putc('#'); + TftpNumchars++; + } + } else +#endif + { + if (((TftpBlock - 1) % 10) == 0) + putc('#'); + else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) + puts("\n\t "); + } +} + +/** + * restart the current transfer due to an error + * + * @param msg Message to print for user + */ +static void restart(const char *msg) +{ + printf("\n%s; starting again\n", msg); +#ifdef CONFIG_MCAST_TFTP + mcast_cleanup(); +#endif + NetStartAgain(); +} + +/* + * Check if the block number has wrapped, and update progress + * + * TODO: The egregious use of global variables in this file should be tidied. + */ +static void update_block_number(void) +{ + /* + * RFC1350 specifies that the first data packet will + * have sequence number 1. If we receive a sequence + * number of 0 this means that there was a wrap + * around of the (16 bit) counter. + */ + if (TftpBlock == 0) { + TftpBlockWrap++; + TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE; + TftpTimeoutCount = 0; /* we've done well, reset thhe timeout */ + } else { + show_block_marker(); + } +} + +/* The TFTP get or put is complete */ +static void tftp_complete(void) +{ +#ifdef CONFIG_TFTP_TSIZE + /* Print hash marks for the last packet received */ + while (TftpTsize && TftpNumchars < 49) { + putc('#'); + TftpNumchars++; + } +#endif + time_start = get_timer(time_start); + if (time_start > 0) { + puts("\n\t "); /* Line up with "Loading: " */ + print_size(NetBootFileXferSize / + time_start * 1000, "/s"); + } + puts("\ndone\n"); + net_set_state(NETLOOP_SUCCESS); +} + +static void +TftpSend(void) +{ + uchar *pkt; + uchar *xp; + int len = 0; + ushort *s; + +#ifdef CONFIG_MCAST_TFTP + /* Multicast TFTP.. non-MasterClients do not ACK data. */ + if (Multicast + && (TftpState == STATE_DATA) + && (MasterClient == 0)) + return; +#endif + /* + * We will always be sending some sort of packet, so + * cobble together the packet headers now. + */ + pkt = NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE; + + switch (TftpState) { + case STATE_SEND_RRQ: + case STATE_SEND_WRQ: + xp = pkt; + s = (ushort *)pkt; +#ifdef CONFIG_CMD_TFTPPUT + *s++ = htons(TftpState == STATE_SEND_RRQ ? TFTP_RRQ : + TFTP_WRQ); +#else + *s++ = htons(TFTP_RRQ); +#endif + pkt = (uchar *)s; + strcpy((char *)pkt, tftp_filename); + pkt += strlen(tftp_filename) + 1; + strcpy((char *)pkt, "octet"); + pkt += 5 /*strlen("octet")*/ + 1; + strcpy((char *)pkt, "timeout"); + pkt += 7 /*strlen("timeout")*/ + 1; + sprintf((char *)pkt, "%lu", TftpTimeoutMSecs / 1000); + debug("send option \"timeout %s\"\n", (char *)pkt); + pkt += strlen((char *)pkt) + 1; +#ifdef CONFIG_TFTP_TSIZE + pkt += sprintf((char *)pkt, "tsize%c%lu%c", + 0, NetBootFileXferSize, 0); +#endif + /* try for more effic. blk size */ + pkt += sprintf((char *)pkt, "blksize%c%d%c", + 0, TftpBlkSizeOption, 0); +#ifdef CONFIG_MCAST_TFTP + /* Check all preconditions before even trying the option */ + if (!ProhibitMcast) { + Bitmap = malloc(Mapsize); + if (Bitmap && eth_get_dev()->mcast) { + free(Bitmap); + Bitmap = NULL; + pkt += sprintf((char *)pkt, "multicast%c%c", + 0, 0); + } + } +#endif /* CONFIG_MCAST_TFTP */ + len = pkt - xp; + break; + + case STATE_OACK: +#ifdef CONFIG_MCAST_TFTP + /* My turn! Start at where I need blocks I missed.*/ + if (Multicast) + TftpBlock = ext2_find_next_zero_bit(Bitmap, + (Mapsize*8), 0); + /*..falling..*/ +#endif + + case STATE_RECV_WRQ: + case STATE_DATA: + xp = pkt; + s = (ushort *)pkt; + s[0] = htons(TFTP_ACK); + s[1] = htons(TftpBlock); + pkt = (uchar *)(s + 2); +#ifdef CONFIG_CMD_TFTPPUT + if (TftpWriting) { + int toload = TftpBlkSize; + int loaded = load_block(TftpBlock, pkt, toload); + + s[0] = htons(TFTP_DATA); + pkt += loaded; + TftpFinalBlock = (loaded < toload); + } +#endif + len = pkt - xp; + break; + + case STATE_TOO_LARGE: + xp = pkt; + s = (ushort *)pkt; + *s++ = htons(TFTP_ERROR); + *s++ = htons(3); + + pkt = (uchar *)s; + strcpy((char *)pkt, "File too large"); + pkt += 14 /*strlen("File too large")*/ + 1; + len = pkt - xp; + break; + + case STATE_BAD_MAGIC: + xp = pkt; + s = (ushort *)pkt; + *s++ = htons(TFTP_ERROR); + *s++ = htons(2); + pkt = (uchar *)s; + strcpy((char *)pkt, "File has bad magic"); + pkt += 18 /*strlen("File has bad magic")*/ + 1; + len = pkt - xp; + break; + } + + NetSendUDPPacket(NetServerEther, TftpRemoteIP, TftpRemotePort, + TftpOurPort, len); +} + +#ifdef CONFIG_CMD_TFTPPUT +static void icmp_handler(unsigned type, unsigned code, unsigned dest, + IPaddr_t sip, unsigned src, uchar *pkt, unsigned len) +{ + if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) { + /* Oh dear the other end has gone away */ + restart("TFTP server died"); + } +} +#endif + +static void +TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, + unsigned len) +{ + __be16 proto; + __be16 *s; + int i; + + if (dest != TftpOurPort) { +#ifdef CONFIG_MCAST_TFTP + if (Multicast + && (!Mcast_port || (dest != Mcast_port))) +#endif + return; + } + if (TftpState != STATE_SEND_RRQ && src != TftpRemotePort && + TftpState != STATE_RECV_WRQ && TftpState != STATE_SEND_WRQ) + return; + + if (len < 2) + return; + len -= 2; + /* warning: don't use increment (++) in ntohs() macros!! */ + s = (__be16 *)pkt; + proto = *s++; + pkt = (uchar *)s; + switch (ntohs(proto)) { + + case TFTP_RRQ: + break; + + case TFTP_ACK: +#ifdef CONFIG_CMD_TFTPPUT + if (TftpWriting) { + if (TftpFinalBlock) { + tftp_complete(); + } else { + /* + * Move to the next block. We want our block + * count to wrap just like the other end! + */ + int block = ntohs(*s); + int ack_ok = (TftpBlock == block); + + TftpBlock = (unsigned short)(block + 1); + update_block_number(); + if (ack_ok) + TftpSend(); /* Send next data block */ + } + } +#endif + break; + + default: + break; + +#ifdef CONFIG_CMD_TFTPSRV + case TFTP_WRQ: + debug("Got WRQ\n"); + TftpRemoteIP = sip; + TftpRemotePort = src; + TftpOurPort = 1024 + (get_timer(0) % 3072); + new_transfer(); + TftpSend(); /* Send ACK(0) */ + break; +#endif + + case TFTP_OACK: + debug("Got OACK: %s %s\n", + pkt, + pkt + strlen((char *)pkt) + 1); + TftpState = STATE_OACK; + TftpRemotePort = src; + /* + * Check for 'blksize' option. + * Careful: "i" is signed, "len" is unsigned, thus + * something like "len-8" may give a *huge* number + */ + for (i = 0; i+8 < len; i++) { + if (strcmp((char *)pkt+i, "blksize") == 0) { + TftpBlkSize = (unsigned short) + simple_strtoul((char *)pkt+i+8, NULL, + 10); + debug("Blocksize ack: %s, %d\n", + (char *)pkt+i+8, TftpBlkSize); + } +#ifdef CONFIG_TFTP_TSIZE + if (strcmp((char *)pkt+i, "tsize") == 0) { + TftpTsize = simple_strtoul((char *)pkt+i+6, + NULL, 10); + debug("size = %s, %d\n", + (char *)pkt+i+6, TftpTsize); + } +#endif + } +#ifdef CONFIG_MCAST_TFTP + parse_multicast_oack((char *)pkt, len-1); + if ((Multicast) && (!MasterClient)) + TftpState = STATE_DATA; /* passive.. */ + else +#endif +#ifdef CONFIG_CMD_TFTPPUT + if (TftpWriting) { + /* Get ready to send the first block */ + TftpState = STATE_DATA; + TftpBlock++; + } +#endif + TftpSend(); /* Send ACK or first data block */ + break; + case TFTP_DATA: + if (len < 2) + return; + len -= 2; + TftpBlock = ntohs(*(__be16 *)pkt); + + update_block_number(); + + if (TftpState == STATE_SEND_RRQ) + debug("Server did not acknowledge timeout option!\n"); + + if (TftpState == STATE_SEND_RRQ || TftpState == STATE_OACK || + TftpState == STATE_RECV_WRQ) { + /* first block received */ + TftpState = STATE_DATA; + TftpRemotePort = src; + new_transfer(); + +#ifdef CONFIG_MCAST_TFTP + if (Multicast) { /* start!=1 common if mcast */ + TftpLastBlock = TftpBlock - 1; + } else +#endif + if (TftpBlock != 1) { /* Assertion */ + printf("\nTFTP error: " + "First block is not block 1 (%ld)\n" + "Starting again\n\n", + TftpBlock); + NetStartAgain(); + break; + } + } + + if (TftpBlock == TftpLastBlock) { + /* + * Same block again; ignore it. + */ + break; + } + + TftpLastBlock = TftpBlock; + TftpTimeoutCountMax = TIMEOUT_COUNT; + NetSetTimeout(TftpTimeoutMSecs, TftpTimeout); + + store_block(TftpBlock - 1, pkt + 2, len); + + /* + * Acknowledge the block just received, which will prompt + * the remote for the next one. + */ +#ifdef CONFIG_MCAST_TFTP + /* if I am the MasterClient, actively calculate what my next + * needed block is; else I'm passive; not ACKING + */ + if (Multicast) { + if (len < TftpBlkSize) { + TftpEndingBlock = TftpBlock; + } else if (MasterClient) { + TftpBlock = PrevBitmapHole = + ext2_find_next_zero_bit( + Bitmap, + (Mapsize*8), + PrevBitmapHole); + if (TftpBlock > ((Mapsize*8) - 1)) { + printf("tftpfile too big\n"); + /* try to double it and retry */ + Mapsize <<= 1; + mcast_cleanup(); + NetStartAgain(); + return; + } + TftpLastBlock = TftpBlock; + } + } +#endif + TftpSend(); + +#ifdef CONFIG_MCAST_TFTP + if (Multicast) { + if (MasterClient && (TftpBlock >= TftpEndingBlock)) { + puts("\nMulticast tftp done\n"); + mcast_cleanup(); + net_set_state(NETLOOP_SUCCESS); + } + } else +#endif + if (len < TftpBlkSize) + tftp_complete(); + break; + + case TFTP_ERROR: + printf("\nTFTP error: '%s' (%d)\n", + pkt + 2, ntohs(*(__be16 *)pkt)); + + switch (ntohs(*(__be16 *)pkt)) { + case TFTP_ERR_FILE_NOT_FOUND: + case TFTP_ERR_ACCESS_DENIED: + puts("Not retrying...\n"); + eth_halt(); + net_set_state(NETLOOP_FAIL); + break; + case TFTP_ERR_UNDEFINED: + case TFTP_ERR_DISK_FULL: + case TFTP_ERR_UNEXPECTED_OPCODE: + case TFTP_ERR_UNKNOWN_TRANSFER_ID: + case TFTP_ERR_FILE_ALREADY_EXISTS: + default: + puts("Starting again\n\n"); +#ifdef CONFIG_MCAST_TFTP + mcast_cleanup(); +#endif + NetStartAgain(); + break; + } + break; + } +} + + +static void +TftpTimeout(void) +{ + if (++TftpTimeoutCount > TftpTimeoutCountMax) { + restart("Retry count exceeded"); + } else { + puts("T "); + NetSetTimeout(TftpTimeoutMSecs, TftpTimeout); + if (TftpState != STATE_RECV_WRQ) + TftpSend(); + } +} + + +void TftpStart(enum proto_t protocol) +{ + char *ep; /* Environment pointer */ + + /* + * Allow the user to choose TFTP blocksize and timeout. + * TFTP protocol has a minimal timeout of 1 second. + */ + ep = getenv("tftpblocksize"); + if (ep != NULL) + TftpBlkSizeOption = simple_strtol(ep, NULL, 10); + + ep = getenv("tftptimeout"); + if (ep != NULL) + TftpTimeoutMSecs = simple_strtol(ep, NULL, 10); + + if (TftpTimeoutMSecs < 1000) { + printf("TFTP timeout (%ld ms) too low, " + "set minimum = 1000 ms\n", + TftpTimeoutMSecs); + TftpTimeoutMSecs = 1000; + } + + debug("TFTP blocksize = %i, timeout = %ld ms\n", + TftpBlkSizeOption, TftpTimeoutMSecs); + + TftpRemoteIP = NetServerIP; + if (BootFile[0] == '\0') { + sprintf(default_filename, "%02X%02X%02X%02X.img", + NetOurIP & 0xFF, + (NetOurIP >> 8) & 0xFF, + (NetOurIP >> 16) & 0xFF, + (NetOurIP >> 24) & 0xFF); + + strncpy(tftp_filename, default_filename, MAX_LEN); + tftp_filename[MAX_LEN-1] = 0; + + printf("*** Warning: no boot file name; using '%s'\n", + tftp_filename); + } else { + char *p = strchr(BootFile, ':'); + + if (p == NULL) { + strncpy(tftp_filename, BootFile, MAX_LEN); + tftp_filename[MAX_LEN-1] = 0; + } else { + TftpRemoteIP = string_to_ip(BootFile); + strncpy(tftp_filename, p + 1, MAX_LEN); + tftp_filename[MAX_LEN-1] = 0; + } + } + + printf("Using %s device\n", eth_get_name()); + printf("TFTP %s server %pI4; our IP address is %pI4", +#ifdef CONFIG_CMD_TFTPPUT + protocol == TFTPPUT ? "to" : "from", +#else + "from", +#endif + &TftpRemoteIP, &NetOurIP); + + /* Check if we need to send across this subnet */ + if (NetOurGatewayIP && NetOurSubnetMask) { + IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; + IPaddr_t RemoteNet = TftpRemoteIP & NetOurSubnetMask; + + if (OurNet != RemoteNet) + printf("; sending through gateway %pI4", + &NetOurGatewayIP); + } + putc('\n'); + + printf("Filename '%s'.", tftp_filename); + + if (NetBootFileSize) { + printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9); + print_size(NetBootFileSize<<9, ""); + } + + putc('\n'); +#ifdef CONFIG_CMD_TFTPPUT + TftpWriting = (protocol == TFTPPUT); + if (TftpWriting) { + printf("Save address: 0x%lx\n", save_addr); + printf("Save size: 0x%lx\n", save_size); + NetBootFileXferSize = save_size; + puts("Saving: *\b"); + TftpState = STATE_SEND_WRQ; + new_transfer(); + } else +#endif + { + printf("Load address: 0x%lx\n", load_addr); + puts("Loading: *\b"); + TftpState = STATE_SEND_RRQ; + } + + time_start = get_timer(0); + TftpTimeoutCountMax = TftpRRQTimeoutCountMax; + + NetSetTimeout(TftpTimeoutMSecs, TftpTimeout); + net_set_udp_handler(TftpHandler); +#ifdef CONFIG_CMD_TFTPPUT + net_set_icmp_handler(icmp_handler); +#endif + TftpRemotePort = WELL_KNOWN_PORT; + TftpTimeoutCount = 0; + /* Use a pseudo-random port unless a specific port is set */ + TftpOurPort = 1024 + (get_timer(0) % 3072); + +#ifdef CONFIG_TFTP_PORT + ep = getenv("tftpdstp"); + if (ep != NULL) + TftpRemotePort = simple_strtol(ep, NULL, 10); + ep = getenv("tftpsrcp"); + if (ep != NULL) + TftpOurPort = simple_strtol(ep, NULL, 10); +#endif + TftpBlock = 0; + + /* zero out server ether in case the server ip has changed */ + memset(NetServerEther, 0, 6); + /* Revert TftpBlkSize to dflt */ + TftpBlkSize = TFTP_BLOCK_SIZE; +#ifdef CONFIG_MCAST_TFTP + mcast_cleanup(); +#endif +#ifdef CONFIG_TFTP_TSIZE + TftpTsize = 0; + TftpNumchars = 0; +#endif + + TftpSend(); +} + +#ifdef CONFIG_CMD_TFTPSRV +void +TftpStartServer(void) +{ + tftp_filename[0] = 0; + + printf("Using %s device\n", eth_get_name()); + printf("Listening for TFTP transfer on %pI4\n", &NetOurIP); + printf("Load address: 0x%lx\n", load_addr); + + puts("Loading: *\b"); + + TftpTimeoutCountMax = TIMEOUT_COUNT; + TftpTimeoutCount = 0; + TftpTimeoutMSecs = TIMEOUT; + NetSetTimeout(TftpTimeoutMSecs, TftpTimeout); + + /* Revert TftpBlkSize to dflt */ + TftpBlkSize = TFTP_BLOCK_SIZE; + TftpBlock = 0; + TftpOurPort = WELL_KNOWN_PORT; + +#ifdef CONFIG_TFTP_TSIZE + TftpTsize = 0; + TftpNumchars = 0; +#endif + + TftpState = STATE_RECV_WRQ; + net_set_udp_handler(TftpHandler); +} +#endif /* CONFIG_CMD_TFTPSRV */ + +#ifdef CONFIG_MCAST_TFTP +/* Credits: atftp project. + */ + +/* pick up BcastAddr, Port, and whether I am [now] the master-client. * + * Frame: + * +-------+-----------+---+-------~~-------+---+ + * | opc | multicast | 0 | addr, port, mc | 0 | + * +-------+-----------+---+-------~~-------+---+ + * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then + * I am the new master-client so must send ACKs to DataBlocks. If I am not + * master-client, I'm a passive client, gathering what DataBlocks I may and + * making note of which ones I got in my bitmask. + * In theory, I never go from master->passive.. + * .. this comes in with pkt already pointing just past opc + */ +static void parse_multicast_oack(char *pkt, int len) +{ + int i; + IPaddr_t addr; + char *mc_adr, *port, *mc; + + mc_adr = port = mc = NULL; + /* march along looking for 'multicast\0', which has to start at least + * 14 bytes back from the end. + */ + for (i = 0; i < len-14; i++) + if (strcmp(pkt+i, "multicast") == 0) + break; + if (i >= (len-14)) /* non-Multicast OACK, ign. */ + return; + + i += 10; /* strlen multicast */ + mc_adr = pkt+i; + for (; i < len; i++) { + if (*(pkt+i) == ',') { + *(pkt+i) = '\0'; + if (port) { + mc = pkt+i+1; + break; + } else { + port = pkt+i+1; + } + } + } + if (!port || !mc_adr || !mc) + return; + if (Multicast && MasterClient) { + printf("I got a OACK as master Client, WRONG!\n"); + return; + } + /* ..I now accept packets destined for this MCAST addr, port */ + if (!Multicast) { + if (Bitmap) { + printf("Internal failure! no mcast.\n"); + free(Bitmap); + Bitmap = NULL; + ProhibitMcast = 1; + return ; + } + /* I malloc instead of pre-declare; so that if the file ends + * up being too big for this bitmap I can retry + */ + Bitmap = malloc(Mapsize); + if (!Bitmap) { + printf("No Bitmap, no multicast. Sorry.\n"); + ProhibitMcast = 1; + return; + } + memset(Bitmap, 0, Mapsize); + PrevBitmapHole = 0; + Multicast = 1; + } + addr = string_to_ip(mc_adr); + if (Mcast_addr != addr) { + if (Mcast_addr) + eth_mcast_join(Mcast_addr, 0); + Mcast_addr = addr; + if (eth_mcast_join(Mcast_addr, 1)) { + printf("Fail to set mcast, revert to TFTP\n"); + ProhibitMcast = 1; + mcast_cleanup(); + NetStartAgain(); + } + } + MasterClient = (unsigned char)simple_strtoul((char *)mc, NULL, 10); + Mcast_port = (unsigned short)simple_strtoul(port, NULL, 10); + printf("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient); + return; +} + +#endif /* Multicast TFTP */ |
