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49 lines
1.5 KiB
Diff
49 lines
1.5 KiB
Diff
From: Stefan Hajnoczi <stefanha@gmail.com>
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Date: Sun, 10 Jan 2010 19:05:17 +0000 (+0000)
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Subject: [tftp] Allow fetching larger files by wrapping block number
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X-Git-Url: http://git.etherboot.org/?p=gpxe.git;a=commitdiff_plain;h=dd99ee95cb513384a13c2be486f684e4a1606ea9
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[tftp] Allow fetching larger files by wrapping block number
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This patch adds TFTP support for files larger than 65535 blocks by
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wrapping the 16-bit block number.
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Reported-by: Mark Johnson <johnson.nh@gmail.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
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Signed-off-by: Marty Connor <mdc@etherboot.org>
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---
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diff --git a/src/net/udp/tftp.c b/src/net/udp/tftp.c
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index bb031ec..82055fc 100644
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--- a/src/net/udp/tftp.c
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+++ b/src/net/udp/tftp.c
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@@ -747,7 +747,7 @@ static int tftp_rx_data ( struct tftp_request *tftp,
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struct io_buffer *iobuf ) {
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struct tftp_data *data = iobuf->data;
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struct xfer_metadata meta;
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- int block;
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+ unsigned int block;
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off_t offset;
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size_t data_len;
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int rc;
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@@ -759,14 +759,17 @@ static int tftp_rx_data ( struct tftp_request *tftp,
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rc = -EINVAL;
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goto done;
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}
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- if ( data->block == 0 ) {
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+
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+ /* Calculate block number */
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+ block = ( ( bitmap_first_gap ( &tftp->bitmap ) + 1 ) & ~0xffff );
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+ if ( data->block == 0 && block == 0 ) {
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DBGC ( tftp, "TFTP %p received data block 0\n", tftp );
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rc = -EINVAL;
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goto done;
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}
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+ block += ( ntohs ( data->block ) - 1 );
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/* Extract data */
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- block = ( ntohs ( data->block ) - 1 );
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offset = ( block * tftp->blksize );
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iob_pull ( iobuf, sizeof ( *data ) );
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data_len = iob_len ( iobuf );
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