/****************************************************************************
Calculate the recommended write buffer size
****************************************************************************/
static size_t cli_write_max_bufsize(struct cli_state *cli, uint16_t write_mode)
{
if (write_mode == 0 &&
!client_is_signing_on(cli) &&
!cli_encryption_on(cli) &&
(cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
(cli->capabilities & CAP_LARGE_FILES)) {
/* Only do massive writes if we can do them direct
* with no signing or encrypting - not on a pipe. */
return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
}
if (cli->is_samba) {
return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
}
if (((cli->capabilities & CAP_LARGE_WRITEX) == 0)
|| client_is_signing_on(cli)
|| strequal(cli->dev, "LPT1:")) {
/*
* Printer devices are restricted to max_xmit writesize in
* Vista and XPSP3 as are signing connections.
*/
return (cli->max_xmit - (smb_size+32)) & ~1023;
}
return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
}
/****************************************************************************
Calculate the recommended read buffer size
****************************************************************************/
static size_t cli_read_max_bufsize(struct cli_state *cli)
{
if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
&& (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
}
if (cli->capabilities & CAP_LARGE_READX) {
return cli->is_samba
? CLI_SAMBA_MAX_LARGE_READX_SIZE
: CLI_WINDOWS_MAX_LARGE_READX_SIZE;
}
return (cli->max_xmit - (smb_size+32)) & ~1023;
}
bool cli_send_smb_direct_writeX(struct cli_state *cli,
const char *p,
size_t extradata)
{
/* First length to send is the offset to the data. */
size_t len = SVAL(cli->outbuf,smb_vwv11) + 4;
size_t nwritten=0;
struct iovec iov[2];
/* fd == -1 causes segfaults -- Tom ([email protected]) */
if (cli->fd == -1) {
return false;
}
if (client_is_signing_on(cli)) {
DEBUG(0,("cli_send_smb_large: cannot send signed packet.\n"));
return false;
}
iov[0].iov_base = (void *)cli->outbuf;
iov[0].iov_len = len;
iov[1].iov_base = CONST_DISCARD(void *, p);
iov[1].iov_len = extradata;
nwritten = write_data_iov(cli->fd, iov, 2);
if (nwritten < (len + extradata)) {
close(cli->fd);
cli->fd = -1;
cli->smb_rw_error = SMB_WRITE_ERROR;
DEBUG(0,("Error writing %d bytes to client. (%s)\n",
(int)(len+extradata), strerror(errno)));
return false;
}
/* Increment the mid so we can tell between responses. */
cli->mid++;
if (!cli->mid)
cli->mid++;
return true;
}
