upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
809 lines
19 KiB
809 lines
19 KiB
/*
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* Copyright 1994, 1995, 2000 Neil Russell.
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* (See License)
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* Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
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* Copyright 2011 Comelit Group SpA,
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* Luca Ceresoli <luca.ceresoli@comelit.it>
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*/
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#include <common.h>
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#include <command.h>
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#include <net.h>
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#include "tftp.h"
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#include "bootp.h"
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/* Well known TFTP port # */
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#define WELL_KNOWN_PORT 69
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/* Millisecs to timeout for lost pkt */
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#define TIMEOUT 5000UL
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#ifndef CONFIG_NET_RETRY_COUNT
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/* # of timeouts before giving up */
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# define TIMEOUT_COUNT 10
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#else
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# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
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#endif
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/* Number of "loading" hashes per line (for checking the image size) */
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#define HASHES_PER_LINE 65
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/*
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* TFTP operations.
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*/
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#define TFTP_RRQ 1
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#define TFTP_WRQ 2
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#define TFTP_DATA 3
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#define TFTP_ACK 4
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#define TFTP_ERROR 5
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#define TFTP_OACK 6
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static ulong TftpTimeoutMSecs = TIMEOUT;
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static int TftpTimeoutCountMax = TIMEOUT_COUNT;
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/*
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* These globals govern the timeout behavior when attempting a connection to a
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* TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to
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* wait for the server to respond to initial connection. Second global,
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* TftpRRQTimeoutCountMax, gives the number of such connection retries.
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* TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be
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* positive. The globals are meant to be set (and restored) by code needing
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* non-standard timeout behavior when initiating a TFTP transfer.
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*/
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ulong TftpRRQTimeoutMSecs = TIMEOUT;
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int TftpRRQTimeoutCountMax = TIMEOUT_COUNT;
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enum {
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TFTP_ERR_UNDEFINED = 0,
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TFTP_ERR_FILE_NOT_FOUND = 1,
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TFTP_ERR_ACCESS_DENIED = 2,
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TFTP_ERR_DISK_FULL = 3,
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TFTP_ERR_UNEXPECTED_OPCODE = 4,
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TFTP_ERR_UNKNOWN_TRANSFER_ID = 5,
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TFTP_ERR_FILE_ALREADY_EXISTS = 6,
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};
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static IPaddr_t TftpRemoteIP;
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/* The UDP port at their end */
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static int TftpRemotePort;
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/* The UDP port at our end */
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static int TftpOurPort;
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static int TftpTimeoutCount;
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/* packet sequence number */
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static ulong TftpBlock;
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/* last packet sequence number received */
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static ulong TftpLastBlock;
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/* count of sequence number wraparounds */
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static ulong TftpBlockWrap;
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/* memory offset due to wrapping */
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static ulong TftpBlockWrapOffset;
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static int TftpState;
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#ifdef CONFIG_TFTP_TSIZE
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/* The file size reported by the server */
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static int TftpTsize;
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/* The number of hashes we printed */
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static short TftpNumchars;
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#endif
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#define STATE_SEND_RRQ 1
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#define STATE_DATA 2
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#define STATE_TOO_LARGE 3
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#define STATE_BAD_MAGIC 4
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#define STATE_OACK 5
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#define STATE_RECV_WRQ 6
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/* default TFTP block size */
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#define TFTP_BLOCK_SIZE 512
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/* sequence number is 16 bit */
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#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16))
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#define DEFAULT_NAME_LEN (8 + 4 + 1)
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static char default_filename[DEFAULT_NAME_LEN];
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#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
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#define MAX_LEN 128
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#else
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#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
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#endif
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static char tftp_filename[MAX_LEN];
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#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
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extern flash_info_t flash_info[];
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#endif
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/* 512 is poor choice for ethernet, MTU is typically 1500.
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* Minus eth.hdrs thats 1468. Can get 2x better throughput with
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* almost-MTU block sizes. At least try... fall back to 512 if need be.
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* (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
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*/
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#ifdef CONFIG_TFTP_BLOCKSIZE
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#define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
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#else
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#define TFTP_MTU_BLOCKSIZE 1468
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#endif
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static unsigned short TftpBlkSize = TFTP_BLOCK_SIZE;
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static unsigned short TftpBlkSizeOption = TFTP_MTU_BLOCKSIZE;
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#ifdef CONFIG_MCAST_TFTP
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#include <malloc.h>
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#define MTFTP_BITMAPSIZE 0x1000
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static unsigned *Bitmap;
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static int PrevBitmapHole, Mapsize = MTFTP_BITMAPSIZE;
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static uchar ProhibitMcast, MasterClient;
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static uchar Multicast;
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extern IPaddr_t Mcast_addr;
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static int Mcast_port;
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static ulong TftpEndingBlock; /* can get 'last' block before done..*/
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static void parse_multicast_oack(char *pkt, int len);
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static void
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mcast_cleanup(void)
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{
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if (Mcast_addr)
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eth_mcast_join(Mcast_addr, 0);
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if (Bitmap)
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free(Bitmap);
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Bitmap = NULL;
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Mcast_addr = Multicast = Mcast_port = 0;
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TftpEndingBlock = -1;
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}
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#endif /* CONFIG_MCAST_TFTP */
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static __inline__ void
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store_block(unsigned block, uchar *src, unsigned len)
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{
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ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
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ulong newsize = offset + len;
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#ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
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int i, rc = 0;
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
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/* start address in flash? */
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if (flash_info[i].flash_id == FLASH_UNKNOWN)
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continue;
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if (load_addr + offset >= flash_info[i].start[0]) {
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rc = 1;
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break;
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}
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}
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if (rc) { /* Flash is destination for this packet */
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rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
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if (rc) {
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flash_perror(rc);
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NetState = NETLOOP_FAIL;
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return;
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}
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}
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else
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#endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
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{
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(void)memcpy((void *)(load_addr + offset), src, len);
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}
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#ifdef CONFIG_MCAST_TFTP
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if (Multicast)
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ext2_set_bit(block, Bitmap);
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#endif
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if (NetBootFileXferSize < newsize)
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NetBootFileXferSize = newsize;
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}
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static void TftpSend(void);
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static void TftpTimeout(void);
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/**********************************************************************/
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static void
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TftpSend(void)
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{
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volatile uchar *pkt;
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volatile uchar *xp;
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int len = 0;
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volatile ushort *s;
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#ifdef CONFIG_MCAST_TFTP
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/* Multicast TFTP.. non-MasterClients do not ACK data. */
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if (Multicast
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&& (TftpState == STATE_DATA)
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&& (MasterClient == 0))
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return;
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#endif
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/*
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* We will always be sending some sort of packet, so
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* cobble together the packet headers now.
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*/
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pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
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switch (TftpState) {
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case STATE_SEND_RRQ:
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xp = pkt;
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s = (ushort *)pkt;
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*s++ = htons(TFTP_RRQ);
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pkt = (uchar *)s;
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strcpy((char *)pkt, tftp_filename);
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pkt += strlen(tftp_filename) + 1;
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strcpy((char *)pkt, "octet");
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pkt += 5 /*strlen("octet")*/ + 1;
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strcpy((char *)pkt, "timeout");
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pkt += 7 /*strlen("timeout")*/ + 1;
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sprintf((char *)pkt, "%lu", TftpTimeoutMSecs / 1000);
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debug("send option \"timeout %s\"\n", (char *)pkt);
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pkt += strlen((char *)pkt) + 1;
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#ifdef CONFIG_TFTP_TSIZE
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memcpy((char *)pkt, "tsize\0000\0", 8);
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pkt += 8;
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#endif
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/* try for more effic. blk size */
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pkt += sprintf((char *)pkt, "blksize%c%d%c",
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0, TftpBlkSizeOption, 0);
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#ifdef CONFIG_MCAST_TFTP
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/* Check all preconditions before even trying the option */
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if (!ProhibitMcast
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&& (Bitmap = malloc(Mapsize))
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&& eth_get_dev()->mcast) {
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free(Bitmap);
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Bitmap = NULL;
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pkt += sprintf((char *)pkt, "multicast%c%c", 0, 0);
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}
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#endif /* CONFIG_MCAST_TFTP */
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len = pkt - xp;
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break;
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case STATE_OACK:
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#ifdef CONFIG_MCAST_TFTP
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/* My turn! Start at where I need blocks I missed.*/
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if (Multicast)
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TftpBlock = ext2_find_next_zero_bit(Bitmap,
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(Mapsize*8), 0);
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/*..falling..*/
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#endif
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case STATE_RECV_WRQ:
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case STATE_DATA:
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xp = pkt;
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s = (ushort *)pkt;
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*s++ = htons(TFTP_ACK);
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*s++ = htons(TftpBlock);
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pkt = (uchar *)s;
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len = pkt - xp;
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break;
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case STATE_TOO_LARGE:
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xp = pkt;
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s = (ushort *)pkt;
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*s++ = htons(TFTP_ERROR);
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*s++ = htons(3);
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pkt = (uchar *)s;
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strcpy((char *)pkt, "File too large");
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pkt += 14 /*strlen("File too large")*/ + 1;
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len = pkt - xp;
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break;
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case STATE_BAD_MAGIC:
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xp = pkt;
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s = (ushort *)pkt;
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*s++ = htons(TFTP_ERROR);
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*s++ = htons(2);
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pkt = (uchar *)s;
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strcpy((char *)pkt, "File has bad magic");
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pkt += 18 /*strlen("File has bad magic")*/ + 1;
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len = pkt - xp;
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break;
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}
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NetSendUDPPacket(NetServerEther, TftpRemoteIP, TftpRemotePort,
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TftpOurPort, len);
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}
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static void
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TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
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unsigned len)
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{
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ushort proto;
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ushort *s;
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int i;
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if (dest != TftpOurPort) {
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#ifdef CONFIG_MCAST_TFTP
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if (Multicast
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&& (!Mcast_port || (dest != Mcast_port)))
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#endif
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return;
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}
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if (TftpState != STATE_SEND_RRQ && src != TftpRemotePort &&
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TftpState != STATE_RECV_WRQ)
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return;
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if (len < 2)
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return;
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len -= 2;
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/* warning: don't use increment (++) in ntohs() macros!! */
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s = (ushort *)pkt;
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proto = *s++;
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pkt = (uchar *)s;
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switch (ntohs(proto)) {
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case TFTP_RRQ:
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case TFTP_ACK:
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break;
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default:
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break;
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#ifdef CONFIG_CMD_TFTPSRV
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case TFTP_WRQ:
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debug("Got WRQ\n");
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TftpRemoteIP = sip;
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TftpRemotePort = src;
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TftpOurPort = 1024 + (get_timer(0) % 3072);
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TftpLastBlock = 0;
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TftpBlockWrap = 0;
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TftpBlockWrapOffset = 0;
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TftpSend(); /* Send ACK(0) */
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break;
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#endif
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case TFTP_OACK:
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debug("Got OACK: %s %s\n",
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pkt,
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pkt + strlen((char *)pkt) + 1);
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TftpState = STATE_OACK;
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TftpRemotePort = src;
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/*
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* Check for 'blksize' option.
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* Careful: "i" is signed, "len" is unsigned, thus
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* something like "len-8" may give a *huge* number
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*/
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for (i = 0; i+8 < len; i++) {
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if (strcmp((char *)pkt+i, "blksize") == 0) {
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TftpBlkSize = (unsigned short)
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simple_strtoul((char *)pkt+i+8, NULL,
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10);
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debug("Blocksize ack: %s, %d\n",
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(char *)pkt+i+8, TftpBlkSize);
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}
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#ifdef CONFIG_TFTP_TSIZE
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if (strcmp((char *)pkt+i, "tsize") == 0) {
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TftpTsize = simple_strtoul((char *)pkt+i+6,
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NULL, 10);
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debug("size = %s, %d\n",
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(char *)pkt+i+6, TftpTsize);
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}
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#endif
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}
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#ifdef CONFIG_MCAST_TFTP
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parse_multicast_oack((char *)pkt, len-1);
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if ((Multicast) && (!MasterClient))
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TftpState = STATE_DATA; /* passive.. */
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else
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#endif
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TftpSend(); /* Send ACK */
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break;
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case TFTP_DATA:
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if (len < 2)
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return;
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len -= 2;
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TftpBlock = ntohs(*(ushort *)pkt);
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/*
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* RFC1350 specifies that the first data packet will
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* have sequence number 1. If we receive a sequence
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* number of 0 this means that there was a wrap
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* around of the (16 bit) counter.
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*/
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if (TftpBlock == 0) {
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TftpBlockWrap++;
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TftpBlockWrapOffset +=
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TftpBlkSize * TFTP_SEQUENCE_SIZE;
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printf("\n\t %lu MB received\n\t ",
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TftpBlockWrapOffset>>20);
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}
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#ifdef CONFIG_TFTP_TSIZE
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else if (TftpTsize) {
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while (TftpNumchars <
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NetBootFileXferSize * 50 / TftpTsize) {
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putc('#');
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TftpNumchars++;
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}
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}
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#endif
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else {
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if (((TftpBlock - 1) % 10) == 0)
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putc('#');
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else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0)
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puts("\n\t ");
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}
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if (TftpState == STATE_SEND_RRQ)
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debug("Server did not acknowledge timeout option!\n");
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if (TftpState == STATE_SEND_RRQ || TftpState == STATE_OACK ||
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TftpState == STATE_RECV_WRQ) {
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/* first block received */
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TftpState = STATE_DATA;
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TftpRemotePort = src;
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TftpLastBlock = 0;
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TftpBlockWrap = 0;
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TftpBlockWrapOffset = 0;
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#ifdef CONFIG_MCAST_TFTP
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if (Multicast) { /* start!=1 common if mcast */
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TftpLastBlock = TftpBlock - 1;
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} else
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#endif
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if (TftpBlock != 1) { /* Assertion */
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printf("\nTFTP error: "
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"First block is not block 1 (%ld)\n"
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"Starting again\n\n",
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TftpBlock);
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NetStartAgain();
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break;
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}
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}
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if (TftpBlock == TftpLastBlock) {
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/*
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* Same block again; ignore it.
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*/
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break;
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}
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TftpLastBlock = TftpBlock;
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TftpTimeoutCountMax = TIMEOUT_COUNT;
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NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
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store_block(TftpBlock - 1, pkt + 2, len);
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/*
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* Acknowledge the block just received, which will prompt
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* the remote for the next one.
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*/
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#ifdef CONFIG_MCAST_TFTP
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/* if I am the MasterClient, actively calculate what my next
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* needed block is; else I'm passive; not ACKING
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*/
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if (Multicast) {
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if (len < TftpBlkSize) {
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TftpEndingBlock = TftpBlock;
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} else if (MasterClient) {
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TftpBlock = PrevBitmapHole =
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ext2_find_next_zero_bit(
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Bitmap,
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(Mapsize*8),
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PrevBitmapHole);
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if (TftpBlock > ((Mapsize*8) - 1)) {
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printf("tftpfile too big\n");
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/* try to double it and retry */
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Mapsize <<= 1;
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mcast_cleanup();
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NetStartAgain();
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return;
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}
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TftpLastBlock = TftpBlock;
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}
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}
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#endif
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TftpSend();
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#ifdef CONFIG_MCAST_TFTP
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if (Multicast) {
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if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
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puts("\nMulticast tftp done\n");
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mcast_cleanup();
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NetState = NETLOOP_SUCCESS;
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}
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}
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else
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#endif
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if (len < TftpBlkSize) {
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/*
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* We received the whole thing. Try to
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* run it.
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*/
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#ifdef CONFIG_TFTP_TSIZE
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/* Print hash marks for the last packet received */
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while (TftpTsize && TftpNumchars < 49) {
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putc('#');
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TftpNumchars++;
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}
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#endif
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puts("\ndone\n");
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NetState = NETLOOP_SUCCESS;
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}
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break;
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case TFTP_ERROR:
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printf("\nTFTP error: '%s' (%d)\n",
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pkt + 2, ntohs(*(ushort *)pkt));
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switch (ntohs(*(ushort *)pkt)) {
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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);
|
|
if (TftpState != STATE_RECV_WRQ)
|
|
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.
|
|
*/
|
|
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, "%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 {
|
|
TftpRemoteIP = 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", &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');
|
|
|
|
printf("Load address: 0x%lx\n", load_addr);
|
|
|
|
puts("Loading: *\b");
|
|
|
|
TftpTimeoutCountMax = TftpRRQTimeoutCountMax;
|
|
|
|
NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
|
|
NetSetHandler(TftpHandler);
|
|
|
|
TftpRemotePort = WELL_KNOWN_PORT;
|
|
TftpTimeoutCount = 0;
|
|
TftpState = STATE_SEND_RRQ;
|
|
/* 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;
|
|
|
|
#if defined(CONFIG_NET_MULTI)
|
|
printf("Using %s device\n", eth_get_name());
|
|
#endif
|
|
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;
|
|
NetSetHandler(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 */
|
|
|