/* * 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" #undef ET_DEBUG #if defined(CONFIG_CMD_NET) #define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ #define TIMEOUT 5 /* Seconds to timeout for a 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 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; #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]; static char *tftp_filename; #ifdef CFG_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. */ #define TFTP_MTU_BLOCKSIZE 1468 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 CFG_DIRECT_FLASH_TFTP int i, rc = 0; for (i=0; i<CFG_MAX_FLASH_BANKS; i++) { /* start address in flash? */ 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 /* CFG_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, "%d", TIMEOUT); #ifdef ET_DEBUG printf("send option \"timeout %s\"\n", (char *)pkt); #endif pkt += strlen((char *)pkt) + 1; /* 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, NetServerIP, 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: #ifdef ET_DEBUG printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1); #endif 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); #ifdef ET_DEBUG printf ("Blocksize ack: %s, %d\n", (char*)pkt+i+8,TftpBlkSize); #endif break; } } #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); } else { if (((TftpBlock - 1) % 10) == 0) { putc ('#'); } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { puts ("\n\t "); } } #ifdef ET_DEBUG if (TftpState == STATE_RRQ) { puts ("Server did not acknowledge timeout option!\n"); } #endif 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; NetSetTimeout (TIMEOUT * CFG_HZ, 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. */ puts ("\ndone\n"); NetState = NETLOOP_SUCCESS; } break; case TFTP_ERROR: printf ("\nTFTP error: '%s' (%d)\n", pkt + 2, ntohs(*(ushort *)pkt)); puts ("Starting again\n\n"); #ifdef CONFIG_MCAST_TFTP mcast_cleanup(); #endif NetStartAgain (); break; } } static void TftpTimeout (void) { if (++TftpTimeoutCount > TIMEOUT_COUNT) { puts ("\nRetry count exceeded; starting again\n"); #ifdef CONFIG_MCAST_TFTP mcast_cleanup(); #endif NetStartAgain (); } else { puts ("T "); NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); TftpSend (); } } void TftpStart (void) { #ifdef CONFIG_TFTP_PORT char *ep; /* Environment pointer */ #endif if (BootFile[0] == '\0') { sprintf(default_filename, "%02lX%02lX%02lX%02lX.img", NetOurIP & 0xFF, (NetOurIP >> 8) & 0xFF, (NetOurIP >> 16) & 0xFF, (NetOurIP >> 24) & 0xFF ); tftp_filename = default_filename; printf ("*** Warning: no boot file name; using '%s'\n", tftp_filename); } else { tftp_filename = BootFile; } #if defined(CONFIG_NET_MULTI) printf ("Using %s device\n", eth_get_name()); #endif puts ("TFTP from server "); print_IPaddr (NetServerIP); puts ("; our IP address is "); print_IPaddr (NetOurIP); /* Check if we need to send across this subnet */ if (NetOurGatewayIP && NetOurSubnetMask) { IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask; if (OurNet != ServerNet) { puts ("; sending through gateway "); print_IPaddr (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"); NetSetTimeout (TIMEOUT * CFG_HZ, 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 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 */ #endif