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/*
Unix SMB/CIFS implementation.
implements a non-blocking connect operation that is aware of the samba4
events system
Copyright (C) Andrew Tridgell 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "lib/socket/socket.h"
#include "lib/events/events.h"
#include "librpc/gen_ndr/nbt.h"
#include "libcli/composite/composite.h"
struct connect_state {
struct composite_context *ctx;
struct socket_context *sock;
const char *my_address;
int my_port;
const char *server_address;
int server_port;
uint32_t flags;
struct fd_event *connect_ev;
};
static void socket_connect_handler(struct event_context *ev,
struct fd_event *fde,
uint16_t flags, void *private);
static void socket_connect_recv_addr(struct composite_context *ctx);
static void socket_connect_recv_conn(struct composite_context *ctx);
struct composite_context *socket_connect_send(struct socket_context *sock,
const char *my_address,
int my_port,
const char *server_address,
int server_port,
uint32_t flags,
struct event_context *event_ctx)
{
struct composite_context *result, *ctx;
struct connect_state *state;
result = talloc_zero(NULL, struct composite_context);
if (result == NULL) goto failed;
result->state = COMPOSITE_STATE_IN_PROGRESS;
result->async.fn = NULL;
result->event_ctx = event_ctx;
state = talloc(result, struct connect_state);
if (state == NULL) goto failed;
state->ctx = result;
result->private_data = state;
state->sock = talloc_reference(state, sock);
if (state->sock == NULL) goto failed;
state->my_address = talloc_strdup(state, my_address);
if (state->sock == NULL) goto failed;
state->my_port = my_port;
state->server_address = talloc_strdup(state, server_address);
if (state->sock == NULL) goto failed;
state->server_port = server_port;
state->flags = flags;
set_blocking(socket_get_fd(sock), False);
if (strcmp(sock->backend_name, "ipv4") == 0) {
struct nbt_name name;
make_nbt_name_client(&name, server_address);
ctx = resolve_name_send(&name, result->event_ctx,
lp_name_resolve_order());
if (ctx == NULL) goto failed;
ctx->async.fn = socket_connect_recv_addr;
ctx->async.private_data = state;
return result;
}
ctx = talloc_zero(state, struct composite_context);
if (ctx == NULL) goto failed;
ctx->state = COMPOSITE_STATE_IN_PROGRESS;
ctx->event_ctx = event_ctx;
ctx->async.fn = socket_connect_recv_conn;
ctx->async.private_data = state;
state->ctx->status = socket_connect(sock, my_address, my_port,
server_address, server_port,
flags);
if (NT_STATUS_IS_ERR(state->ctx->status) &&
!NT_STATUS_EQUAL(state->ctx->status,
NT_STATUS_MORE_PROCESSING_REQUIRED)) {
composite_trigger_error(state->ctx);
return result;
}
state->connect_ev = event_add_fd(state->ctx->event_ctx, state,
socket_get_fd(sock), EVENT_FD_WRITE,
socket_connect_handler, ctx);
if (state->connect_ev == NULL) {
state->ctx->status = NT_STATUS_NO_MEMORY;
composite_trigger_error(state->ctx);
return result;
}
return result;
failed:
talloc_free(result);
return NULL;
}
/*
handle write events on connect completion
*/
static void socket_connect_handler(struct event_context *ev,
struct fd_event *fde,
uint16_t flags, void *private)
{
struct composite_context *ctx =
talloc_get_type(private, struct composite_context);
struct connect_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_state);
ctx->status = socket_connect_complete(state->sock, state->flags);
if (!composite_is_ok(ctx)) return;
composite_done(ctx);
}
static void socket_connect_recv_addr(struct composite_context *ctx)
{
struct connect_state *state =
talloc_get_type(ctx->async.private_data, struct connect_state);
const char *addr;
state->ctx->status = resolve_name_recv(ctx, state, &addr);
if (!composite_is_ok(state->ctx)) return;
ctx = talloc_zero(state, struct composite_context);
if (composite_nomem(ctx, state->ctx)) return;
ctx->state = COMPOSITE_STATE_IN_PROGRESS;
ctx->event_ctx = state->ctx->event_ctx;
ctx->async.fn = socket_connect_recv_conn;
ctx->async.private_data = state;
state->ctx->status = socket_connect(state->sock,
state->my_address,
state->my_port,
state->server_address,
state->server_port,
state->flags);
if (NT_STATUS_IS_ERR(state->ctx->status) &&
!NT_STATUS_EQUAL(state->ctx->status,
NT_STATUS_MORE_PROCESSING_REQUIRED)) {
composite_error(state->ctx, state->ctx->status);
return;
}
state->connect_ev = event_add_fd(ctx->event_ctx, state,
socket_get_fd(state->sock),
EVENT_FD_WRITE,
socket_connect_handler, ctx);
if (composite_nomem(state->connect_ev, state->ctx)) return;
return;
}
static void socket_connect_recv_conn(struct composite_context *ctx)
{
struct connect_state *state =
talloc_get_type(ctx->async.private_data, struct connect_state);
state->ctx->status = ctx->status;
if (!composite_is_ok(state->ctx)) return;
/* We have to free the event context here because the continuation
* function might add an event for this socket directly. */
talloc_free(state->connect_ev);
composite_done(state->ctx);
}
NTSTATUS socket_connect_recv(struct composite_context *ctx)
{
NTSTATUS status = composite_wait(ctx);
talloc_free(ctx);
return status;
}
NTSTATUS socket_connect_ev(struct socket_context *sock,
const char *my_address, int my_port,
const char *server_address, int server_port,
uint32_t flags, struct event_context *ev)
{
struct composite_context *ctx;
ctx = socket_connect_send(sock, my_address, my_port,
server_address, server_port, flags, ev);
return socket_connect_recv(ctx);
}
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