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/*
a composite API for quering file system information
*/
#include "includes.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "libcli/smb_composite/smb_composite.h"
/* the stages of this call */
enum fsinfo_stage {FSINFO_CONNECT, FSINFO_QUERY};
static void fsinfo_raw_handler(struct smbcli_request *req);
static void fsinfo_composite_handler(struct composite_context *c);
static void fsinfo_state_handler(struct composite_context *c);
struct fsinfo_state {
enum fsinfo_stage stage;
struct composite_context *creq;
struct smb_composite_fsinfo *io;
struct smb_composite_connect *connect;
union smb_fsinfo *fsinfo;
struct smbcli_tree *tree;
struct smbcli_request *req;
};
static NTSTATUS fsinfo_connect(struct composite_context *c,
struct smb_composite_fsinfo *io)
{
NTSTATUS status;
struct fsinfo_state *state;
state = talloc_get_type(c->private_data, struct fsinfo_state);
status = smb_composite_connect_recv(state->creq, c);
NT_STATUS_NOT_OK_RETURN(status);
state->fsinfo = talloc(state, union smb_fsinfo);
NT_STATUS_HAVE_NO_MEMORY(state->fsinfo);
state->fsinfo->generic.level = io->in.level;
state->req = smb_raw_fsinfo_send(state->connect->out.tree,
state,
state->fsinfo);
NT_STATUS_HAVE_NO_MEMORY(state->req);
state->req->async.private = c;
state->req->async.fn = fsinfo_raw_handler;
state->stage = FSINFO_QUERY;
c->event_ctx = talloc_reference(c, state->req->session->transport->socket->event.ctx);
return NT_STATUS_OK;
}
static NTSTATUS fsinfo_query(struct composite_context *c,
struct smb_composite_fsinfo *io)
{
NTSTATUS status;
struct fsinfo_state *state;
state = talloc_get_type(c->private_data, struct fsinfo_state);
status = smb_raw_fsinfo_recv(state->req, state, state->fsinfo);
NT_STATUS_NOT_OK_RETURN(status);
state->io->out.fsinfo = state->fsinfo;
c->state = COMPOSITE_STATE_DONE;
if (c->async.fn)
c->async.fn(c);
return NT_STATUS_OK;
}
/*
handler for completion of a sub-request in fsinfo
*/
static void fsinfo_state_handler(struct composite_context *creq)
{
struct fsinfo_state *state = talloc_get_type(creq->private_data, struct fsinfo_state);
/* when this handler is called, the stage indicates what
call has just finished */
switch (state->stage) {
case FSINFO_CONNECT:
creq->status = fsinfo_connect(creq, state->io);
break;
case FSINFO_QUERY:
creq->status = fsinfo_query(creq, state->io);
break;
}
if (!NT_STATUS_IS_OK(creq->status)) {
creq->state = COMPOSITE_STATE_ERROR;
}
if (creq->state >= COMPOSITE_STATE_DONE && creq->async.fn) {
creq->async.fn(creq);
}
}
/*
As raw and composite handlers take different requests, we need to handlers
to adapt both for the same state machine in fsinfo_state_handler()
*/
static void fsinfo_raw_handler(struct smbcli_request *req)
{
struct composite_context *c = talloc_get_type(req->async.private,
struct composite_context);
fsinfo_state_handler(c);
}
static void fsinfo_composite_handler(struct composite_context *creq)
{
struct composite_context *c = talloc_get_type(creq->async.private_data,
struct composite_context);
fsinfo_state_handler(c);
}
/*
composite fsinfo call - connects to a tree and queries a file system information
*/
struct composite_context *smb_composite_fsinfo_send(struct smbcli_tree *tree,
struct smb_composite_fsinfo *io)
{
struct composite_context *c;
struct fsinfo_state *state;
c = talloc_zero(tree, struct composite_context);
if (c == NULL) goto failed;
state = talloc(c, struct fsinfo_state);
if (state == NULL) goto failed;
state->io = io;
state->connect = talloc(state, struct smb_composite_connect);
if (state->connect == NULL) goto failed;
state->connect->in.dest_host = io->in.dest_host;
state->connect->in.port = io->in.port;
state->connect->in.called_name = io->in.called_name;
state->connect->in.service = io->in.service;
state->connect->in.service_type = io->in.service_type;
state->connect->in.credentials = io->in.credentials;
state->connect->in.fallback_to_anonymous = false;
state->connect->in.workgroup = io->in.workgroup;
c->state = COMPOSITE_STATE_IN_PROGRESS;
state->stage = FSINFO_CONNECT;
c->event_ctx = talloc_reference(c, tree->session->transport->socket->event.ctx);
c->private_data = state;
state->creq = smb_composite_connect_send(state->connect, state,
c->event_ctx);
if (state->creq == NULL) goto failed;
state->creq->async.private_data = c;
state->creq->async.fn = fsinfo_composite_handler;
return c;
failed:
talloc_free(c);
return NULL;
}
/*
composite fsinfo call - recv side
*/
NTSTATUS smb_composite_fsinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
{
NTSTATUS status;
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct fsinfo_state *state = talloc_get_type(c->private_data, struct fsinfo_state);
talloc_steal(mem_ctx, state->io->out.fsinfo);
}
talloc_free(c);
return status;
}
/*
composite fsinfo call - sync interface
*/
NTSTATUS smb_composite_fsinfo(struct smbcli_tree *tree,
TALLOC_CTX *mem_ctx,
struct smb_composite_fsinfo *io)
{
struct composite_context *c = smb_composite_fsinfo_send(tree, io);
return smb_composite_fsinfo_recv(c, mem_ctx);
}
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