diff options
| -rw-r--r-- | source3/libsmb/clireadwrite.c | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c index cd732529e9..d1c58f7c2a 100644 --- a/source3/libsmb/clireadwrite.c +++ b/source3/libsmb/clireadwrite.c @@ -28,27 +28,42 @@ ****************************************************************************/ 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; - } - if (cli_state_capabilities(cli) & CAP_LARGE_READX) { - return cli->is_samba - ? CLI_SAMBA_MAX_LARGE_READX_SIZE - : CLI_WINDOWS_MAX_LARGE_READX_SIZE; - } + uint8_t wct = 12; + uint32_t min_space; + uint32_t data_offset; + uint32_t useable_space = 0; + data_offset = HDR_VWV; data_offset += wct * sizeof(uint16_t); + data_offset += sizeof(uint16_t); /* byte count */ data_offset += 1; /* pad */ - useable_space = cli_state_available_size(cli, data_offset); + min_space = cli_state_available_size(cli, data_offset); + + if (cli->server_posix_capabilities & CIFS_UNIX_LARGE_READ_CAP) { + useable_space = 0xFFFFFF - data_offset; + + if (client_is_signing_on(cli)) { + return min_space; + } + + if (cli_encryption_on(cli)) { + return min_space; + } + + return useable_space; + } else if (cli_state_capabilities(cli) & CAP_LARGE_READX) { + /* + * Note: CAP_LARGE_READX also works with signing + */ + useable_space = 0x1FFFF - data_offset; + + useable_space = MIN(useable_space, UINT16_MAX); + + return useable_space; + } - return useable_space; + return min_space; } /**************************************************************************** |