wrepl_out_helpers.c

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		c->status = wreplsrv_pull_cycle_wait_table_reply(state);
		break;
	case WREPLSRV_PULL_CYCLE_STAGE_WAIT_SEND_REPLIES:
		c->status = wreplsrv_pull_cycle_wait_send_replies(state);
		break;
	case WREPLSRV_PULL_CYCLE_STAGE_WAIT_STOP_ASSOC:
		c->status = wreplsrv_pull_cycle_wait_stop_assoc(state);
		break;
	case WREPLSRV_PULL_CYCLE_STAGE_DONE:
		c->status = NT_STATUS_INTERNAL_ERROR;
	}

	if (state->stage == WREPLSRV_PULL_CYCLE_STAGE_DONE) {
		c->state  = COMPOSITE_STATE_DONE;
	}

	if (!NT_STATUS_IS_OK(c->status)) {
		c->state = COMPOSITE_STATE_ERROR;
	}

	if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
		c->async.fn(c);
	}
}

static void wreplsrv_pull_cycle_handler_creq(struct composite_context *creq)
{
	struct wreplsrv_pull_cycle_state *state = talloc_get_type(creq->async.private_data,
						  struct wreplsrv_pull_cycle_state);
	wreplsrv_pull_cycle_handler(state);
	return;
}

static void wreplsrv_pull_cycle_handler_req(struct wrepl_request *req)
{
	struct wreplsrv_pull_cycle_state *state = talloc_get_type(req->async.private,
						  struct wreplsrv_pull_cycle_state);
	wreplsrv_pull_cycle_handler(state);
	return;
}

struct composite_context *wreplsrv_pull_cycle_send(TALLOC_CTX *mem_ctx, struct wreplsrv_pull_cycle_io *io)
{
	struct composite_context *c = NULL;
	struct wreplsrv_service *service = io->in.partner->service;
	struct wreplsrv_pull_cycle_state *state = NULL;

	c = talloc_zero(mem_ctx, struct composite_context);
	if (!c) goto failed;

	state = talloc_zero(c, struct wreplsrv_pull_cycle_state);
	if (!state) goto failed;
	state->c	= c;
	state->io	= io;

	c->state	= COMPOSITE_STATE_IN_PROGRESS;
	c->event_ctx	= service->task->event_ctx;
	c->private_data	= state;

	state->stage	= WREPLSRV_PULL_CYCLE_STAGE_WAIT_TABLE_REPLY;
	state->table_io.in.partner	= io->in.partner;
	state->table_io.in.num_owners	= io->in.num_owners;
	state->table_io.in.owners	= io->in.owners;
	state->creq = wreplsrv_pull_table_send(state, &state->table_io);
	if (!state->creq) goto failed;

	state->creq->async.fn		= wreplsrv_pull_cycle_handler_creq;
	state->creq->async.private_data	= state;

	return c;
failed:
	talloc_free(c);
	return NULL;
}

NTSTATUS wreplsrv_pull_cycle_recv(struct composite_context *c)
{
	NTSTATUS status;

	status = composite_wait(c);

	talloc_free(c);
	return status;
}

enum wreplsrv_push_notify_stage {
	WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT,
	WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM,
	WREPLSRV_PUSH_NOTIFY_STAGE_DONE
};

struct wreplsrv_push_notify_state {
	enum wreplsrv_push_notify_stage stage;
	struct composite_context *c;
	struct wreplsrv_push_notify_io *io;
	enum wrepl_replication_cmd command;
	bool full_table;
	struct wrepl_send_ctrl ctrl;
	struct wrepl_request *req;
	struct wrepl_packet req_packet;
	struct wrepl_packet *rep_packet;
	struct composite_context *creq;
	struct wreplsrv_out_connection *wreplconn;
};

static void wreplsrv_push_notify_handler_creq(struct composite_context *creq);
static void wreplsrv_push_notify_handler_req(struct wrepl_request *req);

static NTSTATUS wreplsrv_push_notify_update(struct wreplsrv_push_notify_state *state)
{
	struct wreplsrv_service *service = state->io->in.partner->service;
	struct wrepl_packet *req = &state->req_packet;
	struct wrepl_replication *repl_out = &state->req_packet.message.replication;
	struct wrepl_table *table_out = &state->req_packet.message.replication.info.table;
	struct wreplsrv_in_connection *wrepl_in;
	NTSTATUS status;
	struct socket_context *sock;
	struct packet_context *packet;
	uint16_t fde_flags;

	/* prepare the outgoing request */
	req->opcode	= WREPL_OPCODE_BITS;
	req->assoc_ctx	= state->wreplconn->assoc_ctx.peer_ctx;
	req->mess_type	= WREPL_REPLICATION;

	repl_out->command = state->command;

	status = wreplsrv_fill_wrepl_table(service, state, table_out,
					   service->wins_db->local_owner, state->full_table);
	NT_STATUS_NOT_OK_RETURN(status);

	/* queue the request */
	state->req = wrepl_request_send(state->wreplconn->sock, req, NULL);
	NT_STATUS_HAVE_NO_MEMORY(state->req);

	/*
	 * now we need to convert the wrepl_socket (client connection)
	 * into a wreplsrv_in_connection (server connection), because
	 * we'll act as a server on this connection after the WREPL_REPL_UPDATE*
	 * message is received by the peer.
	 */

	/* steal the socket_context */
	sock = state->wreplconn->sock->sock;
	state->wreplconn->sock->sock = NULL;
	talloc_steal(state, sock);

	/* 
	 * steal the packet_context
	 * note the request DATA_BLOB we just send on the
	 * wrepl_socket (client connection) is still unter the 
	 * packet context and will be send to the wire
	 */
	packet = state->wreplconn->sock->packet;
	state->wreplconn->sock->packet = NULL;
	talloc_steal(state, packet);

	/*
	 * get the fde_flags of the old fde event,
	 * so that we can later set the same flags to the new one
	 */
	fde_flags = event_get_fd_flags(state->wreplconn->sock->event.fde);

	/*
	 * free the wrepl_socket (client connection)
	 */
	talloc_free(state->wreplconn->sock);
	state->wreplconn->sock = NULL;

	/*
	 * now create a wreplsrv_in_connection,
	 * on which we act as server
	 *
	 * NOTE: sock and packet will be stolen by
	 *       wreplsrv_in_connection_merge()
	 */
	status = wreplsrv_in_connection_merge(state->io->in.partner,
					      sock, packet, &wrepl_in);
	NT_STATUS_NOT_OK_RETURN(status);

	event_set_fd_flags(wrepl_in->conn->event.fde, fde_flags);

	wrepl_in->assoc_ctx.peer_ctx	= state->wreplconn->assoc_ctx.peer_ctx;
	wrepl_in->assoc_ctx.our_ctx	= 0;

	/* now we can free the wreplsrv_out_connection */
	talloc_free(state->wreplconn);
	state->wreplconn = NULL;

	state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_DONE;

	return NT_STATUS_OK;
}

static NTSTATUS wreplsrv_push_notify_inform(struct wreplsrv_push_notify_state *state)
{
	struct wreplsrv_service *service = state->io->in.partner->service;
	struct wrepl_packet *req = &state->req_packet;
	struct wrepl_replication *repl_out = &state->req_packet.message.replication;
	struct wrepl_table *table_out = &state->req_packet.message.replication.info.table;
	NTSTATUS status;

	req->opcode	= WREPL_OPCODE_BITS;
	req->assoc_ctx	= state->wreplconn->assoc_ctx.peer_ctx;
	req->mess_type	= WREPL_REPLICATION;

	repl_out->command = state->command;

	status = wreplsrv_fill_wrepl_table(service, state, table_out,
					   service->wins_db->local_owner, state->full_table);
	NT_STATUS_NOT_OK_RETURN(status);

	/* we won't get a reply to a inform message */
	state->ctrl.send_only		= true;

	state->req = wrepl_request_send(state->wreplconn->sock, req, &state->ctrl);
	NT_STATUS_HAVE_NO_MEMORY(state->req);

	state->req->async.fn		= wreplsrv_push_notify_handler_req;
	state->req->async.private	= state;

	state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM;

	return NT_STATUS_OK;
}

static NTSTATUS wreplsrv_push_notify_wait_connect(struct wreplsrv_push_notify_state *state)
{
	NTSTATUS status;

	status = wreplsrv_out_connect_recv(state->creq, state, &state->wreplconn);
	NT_STATUS_NOT_OK_RETURN(status);

	switch (state->command) {
	case WREPL_REPL_UPDATE:
		state->full_table = true;
		return wreplsrv_push_notify_update(state);
	case WREPL_REPL_UPDATE2:
		state->full_table = false;
		return wreplsrv_push_notify_update(state);
	case WREPL_REPL_INFORM:
		state->full_table = true;
		return wreplsrv_push_notify_inform(state);
	case WREPL_REPL_INFORM2:
		state->full_table = false;
		return wreplsrv_push_notify_inform(state);
	default:
		return NT_STATUS_INTERNAL_ERROR;
	}

	return NT_STATUS_INTERNAL_ERROR;
}

static NTSTATUS wreplsrv_push_notify_wait_inform(struct wreplsrv_push_notify_state *state)
{
	NTSTATUS status;

	status =  wrepl_request_recv(state->req, state, NULL);
	NT_STATUS_NOT_OK_RETURN(status);

	state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_DONE;
	return status;
}

static void wreplsrv_push_notify_handler(struct wreplsrv_push_notify_state *state)
{
	struct composite_context *c = state->c;

	switch (state->stage) {
	case WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT:
		c->status = wreplsrv_push_notify_wait_connect(state);
		break;
	case WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM:
		c->status = wreplsrv_push_notify_wait_inform(state);
		break;
	case WREPLSRV_PUSH_NOTIFY_STAGE_DONE:
		c->status = NT_STATUS_INTERNAL_ERROR;
	}

	if (state->stage == WREPLSRV_PUSH_NOTIFY_STAGE_DONE) {
		c->state  = COMPOSITE_STATE_DONE;
	}

	if (!NT_STATUS_IS_OK(c->status)) {
		c->state = COMPOSITE_STATE_ERROR;
	}

	if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
		c->async.fn(c);
	}
}

static void wreplsrv_push_notify_handler_creq(struct composite_context *creq)
{
	struct wreplsrv_push_notify_state *state = talloc_get_type(creq->async.private_data,
						   struct wreplsrv_push_notify_state);
	wreplsrv_push_notify_handler(state);
	return;
}

static void wreplsrv_push_notify_handler_req(struct wrepl_request *req)
{
	struct wreplsrv_push_notify_state *state = talloc_get_type(req->async.private,
						   struct wreplsrv_push_notify_state);
	wreplsrv_push_notify_handler(state);
	return;
}

struct composite_context *wreplsrv_push_notify_send(TALLOC_CTX *mem_ctx, struct wreplsrv_push_notify_io *io)
{
	struct composite_context *c = NULL;
	struct wreplsrv_service *service = io->in.partner->service;
	struct wreplsrv_push_notify_state *state = NULL;
	enum winsrepl_partner_type partner_type;

	c = talloc_zero(mem_ctx, struct composite_context);
	if (!c) goto failed;

	state = talloc_zero(c, struct wreplsrv_push_notify_state);
	if (!state) goto failed;
	state->c	= c;
	state->io	= io;

	if (io->in.inform) {
		/* we can cache the connection in partner->push->wreplconn */
		partner_type = WINSREPL_PARTNER_PUSH;
		if (io->in.propagate) {
			state->command	= WREPL_REPL_INFORM2;
		} else {
			state->command	= WREPL_REPL_INFORM;
		}
	} else {
		/* we can NOT cache the connection */
		partner_type = WINSREPL_PARTNER_NONE;
		if (io->in.propagate) {
			state->command	= WREPL_REPL_UPDATE2;
		} else {
			state->command	= WREPL_REPL_UPDATE;
		}	
	}

	c->state	= COMPOSITE_STATE_IN_PROGRESS;
	c->event_ctx	= service->task->event_ctx;
	c->private_data	= state;

	state->stage	= WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT;
	state->creq	= wreplsrv_out_connect_send(io->in.partner, partner_type, NULL);
	if (!state->creq) goto failed;

	state->creq->async.fn		= wreplsrv_push_notify_handler_creq;
	state->creq->async.private_data	= state;

	return c;
failed:
	talloc_free(c);
	return NULL;
}

NTSTATUS wreplsrv_push_notify_recv(struct composite_context *c)
{
	NTSTATUS status;

	status = composite_wait(c);

	talloc_free(c);
	return status;
}