/*
send an oplock break request to a client
*/
NTSTATUS smbsrv_send_oplock_break(void *p, struct ntvfs_handle *ntvfs, uint8_t level)
{
struct smbsrv_tcon *tcon = talloc_get_type(p, struct smbsrv_tcon);
struct smbsrv_request *req;
req = smbsrv_init_request(tcon->smb_conn);
NT_STATUS_HAVE_NO_MEMORY(req);
smbsrv_setup_reply(req, 8, 0);
SCVAL(req->out.hdr,HDR_COM,SMBlockingX);
SSVAL(req->out.hdr,HDR_TID,tcon->tid);
SSVAL(req->out.hdr,HDR_PID,0xFFFF);
SSVAL(req->out.hdr,HDR_UID,0);
SSVAL(req->out.hdr,HDR_MID,0xFFFF);
SCVAL(req->out.hdr,HDR_FLG,0);
SSVAL(req->out.hdr,HDR_FLG2,0);
SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
SSVAL(req->out.vwv, VWV(1), 0);
smbsrv_push_fnum(req->out.vwv, VWV(2), ntvfs);
SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE);
SCVAL(req->out.vwv, VWV(3)+1, level);
SIVAL(req->out.vwv, VWV(4), 0);
SSVAL(req->out.vwv, VWV(6), 0);
SSVAL(req->out.vwv, VWV(7), 0);
smbsrv_send_reply(req);
return NT_STATUS_OK;
}
/*
send a continue request
*/
static void reply_trans_continue(struct smbsrv_request *req, uint8_t command,
struct smb_trans2 *trans)
{
struct smbsrv_request *req2;
struct smbsrv_trans_partial *tp;
int count;
/* make sure they don't flood us */
for (count=0,tp=req->smb_conn->trans_partial;tp;tp=tp->next) count++;
if (count > 100) {
smbsrv_send_error(req, NT_STATUS_INSUFFICIENT_RESOURCES);
return;
}
tp = talloc(req, struct smbsrv_trans_partial);
tp->req = req;
tp->u.trans = trans;
tp->command = command;
DLIST_ADD(req->smb_conn->trans_partial, tp);
talloc_set_destructor(tp, smbsrv_trans_partial_destructor);
req2 = smbsrv_setup_secondary_request(req);
/* send a 'please continue' reply */
smbsrv_setup_reply(req2, 0, 0);
smbsrv_send_reply(req2);
}
/*
construct and send an error packet, then destroy the request
auto-converts to DOS error format when appropriate
*/
void smbsrv_send_error(struct smbsrv_request *req, NTSTATUS status)
{
if (req->smb_conn->connection->event.fde == NULL) {
/* the socket has been destroyed - no point trying to send an error! */
talloc_free(req);
return;
}
smbsrv_setup_reply(req, 0, 0);
/* error returns never have any data */
req_grow_data(req, 0);
smbsrv_setup_error(req, status);
smbsrv_send_reply(req);
}
/*
answer a reconstructed trans request
*/
static void reply_trans_send(struct ntvfs_request *ntvfs)
{
struct smbsrv_request *req;
struct trans_op *op;
struct smb_trans2 *trans;
uint16_t params_left, data_left;
uint8_t *params, *data;
int i;
SMBSRV_CHECK_ASYNC_STATUS_ERR(op, struct trans_op);
trans = op->trans;
/* if this function needs work to form the nttrans reply buffer, then
call that now */
if (op->send_fn != NULL) {
NTSTATUS status;
status = op->send_fn(op);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_send_error(req, status);
return;
}
}
params_left = trans->out.params.length;
data_left = trans->out.data.length;
params = trans->out.params.data;
data = trans->out.data.data;
smbsrv_setup_reply(req, 10 + trans->out.setup_count, 0);
if (!NT_STATUS_IS_OK(req->ntvfs->async_states->status)) {
smbsrv_setup_error(req, req->ntvfs->async_states->status);
}
/* we need to divide up the reply into chunks that fit into
the negotiated buffer size */
do {
uint16_t this_data, this_param, max_bytes;
unsigned int align1 = 1, align2 = (params_left ? 2 : 0);
struct smbsrv_request *this_req;
max_bytes = req_max_data(req) - (align1 + align2);
this_param = params_left;
if (this_param > max_bytes) {
this_param = max_bytes;
}
max_bytes -= this_param;
this_data = data_left;
if (this_data > max_bytes) {
this_data = max_bytes;
}
/* don't destroy unless this is the last chunk */
if (params_left - this_param != 0 ||
data_left - this_data != 0) {
this_req = smbsrv_setup_secondary_request(req);
} else {
this_req = req;
}
req_grow_data(this_req, this_param + this_data + (align1 + align2));
SSVAL(this_req->out.vwv, VWV(0), trans->out.params.length);
SSVAL(this_req->out.vwv, VWV(1), trans->out.data.length);
SSVAL(this_req->out.vwv, VWV(2), 0);
SSVAL(this_req->out.vwv, VWV(3), this_param);
SSVAL(this_req->out.vwv, VWV(4), align1 + PTR_DIFF(this_req->out.data, this_req->out.hdr));
SSVAL(this_req->out.vwv, VWV(5), PTR_DIFF(params, trans->out.params.data));
SSVAL(this_req->out.vwv, VWV(6), this_data);
SSVAL(this_req->out.vwv, VWV(7), align1 + align2 +
PTR_DIFF(this_req->out.data + this_param, this_req->out.hdr));
SSVAL(this_req->out.vwv, VWV(8), PTR_DIFF(data, trans->out.data.data));
SCVAL(this_req->out.vwv, VWV(9), trans->out.setup_count);
SCVAL(this_req->out.vwv, VWV(9)+1, 0); /* reserved */
for (i=0;i<trans->out.setup_count;i++) {
SSVAL(this_req->out.vwv, VWV(10+i), trans->out.setup[i]);
}
memset(this_req->out.data, 0, align1);
if (this_param != 0) {
memcpy(this_req->out.data + align1, params, this_param);
}
memset(this_req->out.data+this_param+align1, 0, align2);
if (this_data != 0) {
memcpy(this_req->out.data+this_param+align1+align2, data, this_data);
}
params_left -= this_param;
data_left -= this_data;
params += this_param;
data += this_data;
smbsrv_send_reply(this_req);
} while (params_left != 0 || data_left != 0);
}
