diff options
Diffstat (limited to 'u-boot/net/tftp.c')
| -rw-r--r-- | u-boot/net/tftp.c | 729 |
1 files changed, 729 insertions, 0 deletions
diff --git a/u-boot/net/tftp.c b/u-boot/net/tftp.c new file mode 100644 index 0000000..ed559b7 --- /dev/null +++ b/u-boot/net/tftp.c @@ -0,0 +1,729 @@ +/* + * Copyright 1994, 1995, 2000 Neil Russell. + * (See License) + * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de + */ + +#include <common.h> +#include <command.h> +#include <net.h> +#include "tftp.h" +#include "bootp.h" + +#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ +#define TIMEOUT 5000UL /* Millisecs to timeout for lost pkt */ +#ifndef CONFIG_NET_RETRY_COUNT +# define TIMEOUT_COUNT 10 /* # of timeouts before giving up */ +#else +# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2) +#endif + /* (for checking the image size) */ +#define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */ + +/* + * 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; + +/* + * 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 TftpServerIP; +static int TftpServerPort; /* The UDP port at their end */ +static int TftpOurPort; /* The UDP port at our end */ +static int TftpTimeoutCount; +static ulong TftpBlock; /* packet sequence number */ +static ulong TftpLastBlock; /* last packet sequence number received */ +static ulong TftpBlockWrap; /* count of sequence number wraparounds */ +static ulong TftpBlockWrapOffset; /* memory offset due to wrapping */ +static int TftpState; +#ifdef CONFIG_TFTP_TSIZE +static int TftpTsize; /* The file size reported by the server */ +static short TftpNumchars; /* The number of hashes we printed */ +#endif + +#define STATE_RRQ 1 +#define STATE_DATA 2 +#define STATE_TOO_LARGE 3 +#define STATE_BAD_MAGIC 4 +#define STATE_OACK 5 + +#define TFTP_BLOCK_SIZE 512 /* default TFTP block size */ +#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) /* sequence number is 16 bit */ + +#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]; + +#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP +extern flash_info_t flash_info[]; +#endif + +/* 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=0, MasterClient=0; +static uchar Multicast=0; +extern IPaddr_t Mcast_addr; +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 (unsigned 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); + NetState = 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; +} + +static void TftpSend (void); +static void TftpTimeout (void); + +/**********************************************************************/ + +static void +TftpSend (void) +{ + volatile uchar * pkt; + volatile uchar * xp; + int len = 0; + volatile 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_HDR_SIZE; + + switch (TftpState) { + + case STATE_RRQ: + xp = pkt; + s = (ushort *)pkt; + *s++ = htons(TFTP_RRQ); + 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 + memcpy((char *)pkt, "tsize\0000\0", 8); + pkt += 8; +#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)) + && 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_DATA: + xp = pkt; + s = (ushort *)pkt; + *s++ = htons(TFTP_ACK); + *s++ = htons(TftpBlock); + pkt = (uchar *)s; + 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, TftpServerIP, TftpServerPort, TftpOurPort, len); +} + + +static void +TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) +{ + ushort proto; + ushort *s; + int i; + + if (dest != TftpOurPort) { +#ifdef CONFIG_MCAST_TFTP + if (Multicast + && (!Mcast_port || (dest != Mcast_port))) +#endif + return; + } + if (TftpState != STATE_RRQ && src != TftpServerPort) { + return; + } + + if (len < 2) { + return; + } + len -= 2; + /* warning: don't use increment (++) in ntohs() macros!! */ + s = (ushort *)pkt; + proto = *s++; + pkt = (uchar *)s; + switch (ntohs(proto)) { + + case TFTP_RRQ: + case TFTP_WRQ: + case TFTP_ACK: + break; + default: + break; + + case TFTP_OACK: + debug("Got OACK: %s %s\n", + pkt, + pkt + strlen((char *)pkt) + 1); + TftpState = STATE_OACK; + TftpServerPort = 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 + TftpSend (); /* Send ACK */ + break; + case TFTP_DATA: + if (len < 2) + return; + len -= 2; + TftpBlock = ntohs(*(ushort *)pkt); + + /* + * 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; + printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20); + } +#ifdef CONFIG_TFTP_TSIZE + else if (TftpTsize) { + while (TftpNumchars < NetBootFileXferSize * 50 / TftpTsize) { + putc('#'); + TftpNumchars++; + } + } +#endif + else { + if (((TftpBlock - 1) % 10) == 0) { + putc ('#'); + } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { + puts ("\n\t "); + } + } + + if (TftpState == STATE_RRQ) + debug("Server did not acknowledge timeout option!\n"); + + if (TftpState == STATE_RRQ || TftpState == STATE_OACK) { + /* first block received */ + TftpState = STATE_DATA; + TftpServerPort = src; + TftpLastBlock = 0; + TftpBlockWrap = 0; + TftpBlockWrapOffset = 0; + +#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); + + /* + * Acknoledge the block just received, which will prompt + * the server 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(); + NetState = NETLOOP_SUCCESS; + } + } + else +#endif + if (len < TftpBlkSize) { + /* + * We received the whole thing. Try to + * run it. + */ +#ifdef CONFIG_TFTP_TSIZE + /* Print out the hash marks for the last packet received */ + while (TftpTsize && TftpNumchars < 49) { + putc('#'); + TftpNumchars++; + } +#endif + puts ("\ndone\n"); + NetState = NETLOOP_SUCCESS; + } + break; + + case TFTP_ERROR: + printf ("\nTFTP error: '%s' (%d)\n", + pkt + 2, ntohs(*(ushort *)pkt)); + + switch (ntohs(*(ushort *)pkt)) { + case TFTP_ERR_FILE_NOT_FOUND: + case TFTP_ERR_ACCESS_DENIED: + puts("Not retrying...\n"); + eth_halt(); + NetState = 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) { + puts ("\nRetry count exceeded; starting again\n"); +#ifdef CONFIG_MCAST_TFTP + mcast_cleanup(); +#endif + NetStartAgain (); + } else { + puts ("T "); + NetSetTimeout (TftpTimeoutMSecs, TftpTimeout); + TftpSend (); + } +} + + +void +TftpStart (void) +{ + char *ep; /* Environment pointer */ + + /* + * Allow the user to choose TFTP blocksize and timeout. + * TFTP protocol has a minimal timeout of 1 second. + */ + if ((ep = getenv("tftpblocksize")) != NULL) + TftpBlkSizeOption = simple_strtol(ep, NULL, 10); + + if ((ep = getenv("tftptimeout")) != 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); + + TftpServerIP = NetServerIP; + if (BootFile[0] == '\0') { + sprintf(default_filename, "%02lX%02lX%02lX%02lX.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 { + TftpServerIP = string_to_ip (BootFile); + strncpy(tftp_filename, p + 1, MAX_LEN); + tftp_filename[MAX_LEN-1] = 0; + } + } + +#if defined(CONFIG_NET_MULTI) + printf ("Using %s device\n", eth_get_name()); +#endif + printf("TFTP from server %pI4" + "; our IP address is %pI4", &TftpServerIP, &NetOurIP); + + /* Check if we need to send across this subnet */ + if (NetOurGatewayIP && NetOurSubnetMask) { + IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; + IPaddr_t ServerNet = TftpServerIP & NetOurSubnetMask; + + if (OurNet != ServerNet) + 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'); + + printf ("Load address: 0x%lx\n", load_addr); + + puts ("Loading: *\b"); + + TftpTimeoutCountMax = TftpRRQTimeoutCountMax; + + NetSetTimeout (TftpTimeoutMSecs, TftpTimeout); + NetSetHandler (TftpHandler); + + TftpServerPort = WELL_KNOWN_PORT; + TftpTimeoutCount = 0; + TftpState = STATE_RRQ; + /* Use a pseudo-random port unless a specific port is set */ + TftpOurPort = 1024 + (get_timer(0) % 3072); + +#ifdef CONFIG_TFTP_PORT + if ((ep = getenv("tftpdstp")) != NULL) { + TftpServerPort = simple_strtol(ep, NULL, 10); + } + if ((ep = getenv("tftpsrcp")) != 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_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 + */ + if (!(Bitmap = malloc (Mapsize))) { + 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); + if (eth_mcast_join(Mcast_addr=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 */ |