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s3:libsmb/clireadwrite: calculate cli_read_max_bufsize() correct based on max_xmit

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This is important in order to support DCERPC over ncacn_np against NT4 servers,
where max_xmit is just 4356.

metze
This commit is contained in:
Stefan Metzmacher 2011-06-08 18:59:39 +02:00 committed by Jeremy Allison
parent 5d06b2197b
commit 73128b7cc7
1 changed files with 12 additions and 1 deletions
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13
source3/libsmb/clireadwrite.c
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@ -28,6 +28,11 @@
****************************************************************************/
static size_t cli_read_max_bufsize(struct cli_state *cli)
{
size_t data_offset = smb_size - 4;
size_t wct = 12;
size_t useable_space;
if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
&& (cli->server_posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
@ -37,7 +42,13 @@ static size_t cli_read_max_bufsize(struct cli_state *cli)
? CLI_SAMBA_MAX_LARGE_READX_SIZE
: CLI_WINDOWS_MAX_LARGE_READX_SIZE;
}
return (cli->max_xmit - (smb_size+32)) & ~1023;
data_offset += wct * sizeof(uint16_t);
data_offset += 1; /* pad */
useable_space = cli->max_xmit - data_offset;
return useable_space;
}
/****************************************************************************