diff options
Diffstat (limited to 'net/tftp.c')
| -rw-r--r-- | net/tftp.c | 244 |
1 files changed, 238 insertions, 6 deletions
@@ -12,7 +12,7 @@ #undef ET_DEBUG -#if (CONFIG_COMMANDS & CFG_CMD_NET) +#if defined(CONFIG_CMD_NET) #define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ #define TIMEOUT 5 /* Seconds to timeout for a lost pkt */ @@ -61,10 +61,43 @@ static char *tftp_filename; 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 * TFTP_BLOCK_SIZE + TftpBlockWrapOffset; + ulong offset = block * TftpBlkSize + TftpBlockWrapOffset; ulong newsize = offset + len; #ifdef CFG_DIRECT_FLASH_TFTP int i, rc = 0; @@ -90,6 +123,10 @@ store_block (unsigned block, uchar * src, unsigned len) { (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; @@ -108,6 +145,13 @@ TftpSend (void) 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. @@ -132,11 +176,30 @@ TftpSend (void) 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_DATA: 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); @@ -177,8 +240,13 @@ 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) { @@ -208,6 +276,28 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) #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: @@ -224,7 +314,7 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) */ if (TftpBlock == 0) { TftpBlockWrap++; - TftpBlockWrapOffset += TFTP_BLOCK_SIZE * TFTP_SEQUENCE_SIZE; + TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE; printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20); } else { if (((TftpBlock - 1) % 10) == 0) { @@ -248,6 +338,11 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 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" @@ -274,9 +369,44 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned 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 (); - if (len < TFTP_BLOCK_SIZE) { +#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. @@ -290,6 +420,9 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 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; } @@ -301,6 +434,9 @@ TftpTimeout (void) { if (++TftpTimeoutCount > TIMEOUT_COUNT) { puts ("\nRetry count exceeded; starting again\n"); +#ifdef CONFIG_MCAST_TFTP + mcast_cleanup(); +#endif NetStartAgain (); } else { puts ("T "); @@ -370,6 +506,7 @@ TftpStart (void) 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); @@ -382,8 +519,103 @@ TftpStart (void) /* 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 (); } -#endif /* CFG_CMD_NET */ +#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 |