diff options
Diffstat (limited to 'net/tftp.c')
| -rw-r--r-- | net/tftp.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/net/tftp.c b/net/tftp.c new file mode 100644 index 0000000..0ad244f --- /dev/null +++ b/net/tftp.c @@ -0,0 +1,326 @@ +/* + * 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 (CONFIG_COMMANDS & CFG_CMD_NET) + +#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ +#define TIMEOUT 2 /* 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 + + +static int TftpServerPort; /* The UDP port at their end */ +static int TftpOurPort; /* The UDP port at our end */ +static int TftpTimeoutCount; +static unsigned TftpBlock; +static unsigned TftpLastBlock; +static int TftpState; +#define STATE_RRQ 1 +#define STATE_DATA 2 +#define STATE_TOO_LARGE 3 +#define STATE_BAD_MAGIC 4 + +#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[CFG_MAX_FLASH_BANKS]; +#endif + +static __inline__ void +store_block (unsigned block, uchar * src, unsigned len) +{ + ulong offset = block * 512, 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 ((uchar *)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); + } + + 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; + + /* + * We will always be sending some sort of packet, so + * cobble together the packet headers now. + */ + pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE; + + switch (TftpState) { + + case STATE_RRQ: + xp = pkt; + *((ushort *)pkt)++ = htons(TFTP_RRQ); + strcpy ((char *)pkt, tftp_filename); + pkt += strlen(tftp_filename) + 1; + strcpy ((char *)pkt, "octet"); + pkt += 5 /*strlen("octet")*/ + 1; + len = pkt - xp; + break; + + case STATE_DATA: + xp = pkt; + *((ushort *)pkt)++ = htons(TFTP_ACK); + *((ushort *)pkt)++ = htons(TftpBlock); + len = pkt - xp; + break; + + case STATE_TOO_LARGE: + xp = pkt; + *((ushort *)pkt)++ = htons(TFTP_ERROR); + *((ushort *)pkt)++ = htons(3); + strcpy ((char *)pkt, "File too large"); + pkt += 14 /*strlen("File too large")*/ + 1; + len = pkt - xp; + break; + + case STATE_BAD_MAGIC: + xp = pkt; + *((ushort *)pkt)++ = htons(TFTP_ERROR); + *((ushort *)pkt)++ = htons(2); + strcpy ((char *)pkt, "File has bad magic"); + pkt += 18 /*strlen("File has bad magic")*/ + 1; + len = pkt - xp; + break; + } + + NetSetEther (NetTxPacket, NetServerEther, PROT_IP); + NetSetIP (NetTxPacket + ETHER_HDR_SIZE, NetServerIP, + TftpServerPort, TftpOurPort, len); + NetSendPacket (NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len); +} + + +static void +TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) +{ + ushort proto; + + if (dest != TftpOurPort) { + return; + } + if (TftpState != STATE_RRQ && src != TftpServerPort) { + return; + } + + if (len < 2) { + return; + } + len -= 2; + /* warning: don't use increment (++) in ntohs() macros!! */ + proto = *((ushort *)pkt)++; + switch (ntohs(proto)) { + + case TFTP_RRQ: + case TFTP_WRQ: + case TFTP_ACK: + break; + default: + break; + + case TFTP_DATA: + if (len < 2) + return; + len -= 2; + TftpBlock = ntohs(*(ushort *)pkt); + if (((TftpBlock - 1) % 10) == 0) { + putc ('#'); + } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { + puts ("\n\t "); + } + + if (TftpState == STATE_RRQ) { + TftpState = STATE_DATA; + TftpServerPort = src; + TftpLastBlock = 0; + + if (TftpBlock != 1) { /* Assertion */ + printf ("\nTFTP error: " + "First block is not block 1 (%d)\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. + */ + TftpSend (); + + if (len < 512) { + /* + * 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"); + NetStartAgain (); + break; + } +} + + +static void +TftpTimeout (void) +{ + if (++TftpTimeoutCount >= TIMEOUT_COUNT) { + puts ("\nRetry count exceeded; starting again\n"); + NetStartAgain (); + } else { + puts ("T "); + NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); + TftpSend (); + } +} + + +void +TftpStart (void) +{ +#ifdef ET_DEBUG + printf ("\nServer ethernet address %02x:%02x:%02x:%02x:%02x:%02x\n", + NetServerEther[0], + NetServerEther[1], + NetServerEther[2], + NetServerEther[3], + NetServerEther[4], + NetServerEther[5] + ); +#endif /* DEBUG */ + + if (BootFile[0] == '\0') { + IPaddr_t OurIP = ntohl(NetOurIP); + + sprintf(default_filename, "%02lX%02lX%02lX%02lX.img", + OurIP & 0xFF, + (OurIP >> 8) & 0xFF, + (OurIP >> 16) & 0xFF, + (OurIP >> 24) & 0xFF ); + tftp_filename = default_filename; + + printf ("*** Warning: no boot file name; using '%s'\n", + tftp_filename); + } else { + tftp_filename = BootFile; + } + + 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; + TftpOurPort = 1024 + (get_timer(0) % 3072); + + TftpSend (); +} + +#endif /* CFG_CMD_NET */ |