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/*
Unix SMB/CIFS implementation.
Copyright (C) Volker Lendecke 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
a composite API for loading a whole file into memory
*/
#include "includes.h"
#include "libcli/composite/composite.h"
#include "libcli/smb_composite/smb_composite.h"
#include "param/param.h"
#include "libcli/resolve/resolve.h"
enum fetchfile_stage {FETCHFILE_CONNECT,
FETCHFILE_READ};
struct fetchfile_state {
enum fetchfile_stage stage;
struct smb_composite_fetchfile *io;
struct composite_context *creq;
struct smb_composite_connect *connect;
struct smb_composite_loadfile *loadfile;
};
static void fetchfile_composite_handler(struct composite_context *req);
static NTSTATUS fetchfile_connect(struct composite_context *c,
struct smb_composite_fetchfile *io)
{
NTSTATUS status;
struct fetchfile_state *state;
state = talloc_get_type(c->private_data, struct fetchfile_state);
status = smb_composite_connect_recv(state->creq, c);
NT_STATUS_NOT_OK_RETURN(status);
state->loadfile = talloc(state, struct smb_composite_loadfile);
NT_STATUS_HAVE_NO_MEMORY(state->loadfile);
state->loadfile->in.fname = io->in.filename;
state->creq = smb_composite_loadfile_send(state->connect->out.tree,
state->loadfile);
NT_STATUS_HAVE_NO_MEMORY(state->creq);
state->creq->async.private_data = c;
state->creq->async.fn = fetchfile_composite_handler;
state->stage = FETCHFILE_READ;
c->event_ctx = talloc_reference(c, state->creq->event_ctx);
return NT_STATUS_OK;
}
static NTSTATUS fetchfile_read(struct composite_context *c,
struct smb_composite_fetchfile *io)
{
NTSTATUS status;
struct fetchfile_state *state;
state = talloc_get_type(c->private_data, struct fetchfile_state);
status = smb_composite_loadfile_recv(state->creq, NULL);
NT_STATUS_NOT_OK_RETURN(status);
io->out.data = state->loadfile->out.data;
io->out.size = state->loadfile->out.size;
c->state = COMPOSITE_STATE_DONE;
if (c->async.fn)
c->async.fn(c);
return NT_STATUS_OK;
}
static void fetchfile_state_handler(struct composite_context *c)
{
struct fetchfile_state *state;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
state = talloc_get_type(c->private_data, struct fetchfile_state);
/* when this handler is called, the stage indicates what
call has just finished */
switch (state->stage) {
case FETCHFILE_CONNECT:
status = fetchfile_connect(c, state->io);
break;
case FETCHFILE_READ:
status = fetchfile_read(c, state->io);
break;
}
if (!NT_STATUS_IS_OK(status)) {
c->status = status;
c->state = COMPOSITE_STATE_ERROR;
if (c->async.fn) {
c->async.fn(c);
}
}
}
static void fetchfile_composite_handler(struct composite_context *creq)
{
struct composite_context *c = talloc_get_type(creq->async.private_data,
struct composite_context);
fetchfile_state_handler(c);
}
struct composite_context *smb_composite_fetchfile_send(struct smb_composite_fetchfile *io,
struct event_context *event_ctx)
{
struct composite_context *c;
struct fetchfile_state *state;
c = talloc_zero(NULL, struct composite_context);
if (c == NULL) goto failed;
state = talloc(c, struct fetchfile_state);
if (state == NULL) goto failed;
state->connect = talloc(state, struct smb_composite_connect);
if (state->connect == NULL) goto failed;
state->io = io;
state->connect->in.dest_host = io->in.dest_host;
state->connect->in.dest_ports = io->in.ports;
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;
state->connect->in.options = io->in.options;
state->creq = smb_composite_connect_send(state->connect, state,
lp_resolve_context(global_loadparm), event_ctx);
if (state->creq == NULL) goto failed;
state->creq->async.private_data = c;
state->creq->async.fn = fetchfile_composite_handler;
c->state = COMPOSITE_STATE_IN_PROGRESS;
state->stage = FETCHFILE_CONNECT;
c->event_ctx = talloc_reference(c, state->creq->event_ctx);
c->private_data = state;
return c;
failed:
talloc_free(c);
return NULL;
}
NTSTATUS smb_composite_fetchfile_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx)
{
NTSTATUS status;
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct fetchfile_state *state = talloc_get_type(c->private_data, struct fetchfile_state);
talloc_steal(mem_ctx, state->io->out.data);
}
talloc_free(c);
return status;
}
NTSTATUS smb_composite_fetchfile(struct smb_composite_fetchfile *io,
TALLOC_CTX *mem_ctx)
{
struct composite_context *c = smb_composite_fetchfile_send(io, NULL);
return smb_composite_fetchfile_recv(c, mem_ctx);
}
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