Use read_packet for wb_req_read

1 files changed, 36 insertions, 92 deletions

diff --git a/source3/lib/wb_reqtrans.c b/source3/lib/wb_reqtrans.c
index 1be7239092..76b0f53717 100644
--- a/source3/lib/wb_reqtrans.c
+++ b/source3/lib/wb_reqtrans.c
@@ -27,9 +27,7 @@
 
 struct req_read_state {
 	struct winbindd_request *wb_req;
-	struct tevent_context *ev;
 	size_t max_extra_data;
-	int fd;
 };
 
 bool async_req_is_wbcerr(struct async_req *req, wbcErr *pwbc_err)
@@ -83,145 +81,91 @@ wbcErr async_req_simple_recv_wbcerr(struct async_req *req)
 	return WBC_ERR_SUCCESS;
 }
 
-static void wb_req_read_len(struct async_req *subreq);
-static void wb_req_read_main(struct async_req *subreq);
-static void wb_req_read_extra(struct async_req *subreq);
+static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
+static void wb_req_read_done(struct tevent_req *subreq);
 
 struct async_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
 				   struct tevent_context *ev,
 				   int fd, size_t max_extra_data)
 {
-	struct async_req *result, *subreq;
+	struct async_req *result;
+	struct tevent_req *subreq;
 	struct req_read_state *state;
 
 	if (!async_req_setup(mem_ctx, &result, &state,
 			     struct req_read_state)) {
 		return NULL;
 	}
-	state->fd = fd;
-	state->ev = ev;
 	state->max_extra_data = max_extra_data;
-	state->wb_req = talloc(state, struct winbindd_request);
-	if (state->wb_req == NULL) {
-		goto nomem;
-	}
 
-	subreq = recvall_send(state, ev, state->fd, &(state->wb_req->length),
-			      sizeof(state->wb_req->length), 0);
+	subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
 	if (subreq == NULL) {
 		goto nomem;
 	}
 
-	subreq->async.fn = wb_req_read_len;
-	subreq->async.priv = result;
+	subreq->async.fn = wb_req_read_done;
+	subreq->async.private_data = result;
 	return result;
-
  nomem:
 	TALLOC_FREE(result);
 	return NULL;
 }
 
-static void wb_req_read_len(struct async_req *subreq)
+static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
 {
-	struct async_req *req = talloc_get_type_abort(
-		subreq->async.priv, struct async_req);
 	struct req_read_state *state = talloc_get_type_abort(
-		req->private_data, struct req_read_state);
-	int err;
-	ssize_t ret;
+		private_data, struct req_read_state);
+	struct winbindd_request *req = (struct winbindd_request *)buf;
 
-	ret = recvall_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (ret < 0) {
-		async_req_error(req, map_wbc_err_from_errno(err));
-		return;
+	if (buflen == 4) {
+		if (req->length != sizeof(struct winbindd_request)) {
+			DEBUG(0, ("wb_req_read_len: Invalid request size "
+				  "received: %d (expected %d)\n",
+				  (int)req->length,
+				  (int)sizeof(struct winbindd_request)));
+			return -1;
+		}
+		return sizeof(struct winbindd_request) - 4;
 	}
 
-	if (state->wb_req->length != sizeof(struct winbindd_request)) {
-		DEBUG(0, ("wb_req_read_len: Invalid request size received: "
-			  "%d (expected %d)\n", (int)state->wb_req->length,
-			  (int)sizeof(struct winbindd_request)));
-		async_req_error(req, WBC_ERR_INVALID_RESPONSE);
-		return;
-	}
-
-	subreq = recvall_send(
-		req, state->ev, state->fd, (uint32 *)(state->wb_req)+1,
-		sizeof(struct winbindd_request) - sizeof(uint32), 0);
-	if (async_req_nomem(subreq, req)) {
-		return;
+	if ((state->max_extra_data != 0)
+	    && (req->extra_len > state->max_extra_data)) {
+		DEBUG(3, ("Got request with %d bytes extra data on "
+			  "unprivileged socket\n", (int)req->extra_len));
+		return -1;
 	}
 
-	subreq->async.fn = wb_req_read_main;
-	subreq->async.priv = req;
+	return req->extra_len;
 }
 
-static void wb_req_read_main(struct async_req *subreq)
+static void wb_req_read_done(struct tevent_req *subreq)
 {
 	struct async_req *req = talloc_get_type_abort(
-		subreq->async.priv, struct async_req);
+		subreq->async.private_data, struct async_req);
 	struct req_read_state *state = talloc_get_type_abort(
 		req->private_data, struct req_read_state);
 	int err;
 	ssize_t ret;
+	uint8_t *buf;
 
-	ret = recvall_recv(subreq, &err);
+	ret = read_packet_recv(subreq, state, &buf, &err);
 	TALLOC_FREE(subreq);
-	if (ret < 0) {
+	if (ret == -1) {
 		async_req_error(req, map_wbc_err_from_errno(err));
 		return;
 	}
 
-	if ((state->max_extra_data != 0)
-	    && (state->wb_req->extra_len > state->max_extra_data)) {
-		DEBUG(3, ("Got request with %d bytes extra data on "
-			  "unprivileged socket\n",
-			  (int)state->wb_req->extra_len));
-		async_req_error(req, WBC_ERR_INVALID_RESPONSE);
-		return;
-	}
-
-	if (state->wb_req->extra_len == 0) {
-		async_req_done(req);
-		return;
-	}
-
-	state->wb_req->extra_data.data = TALLOC_ARRAY(
-		state->wb_req, char, state->wb_req->extra_len + 1);
-	if (async_req_nomem(state->wb_req->extra_data.data, req)) {
-		return;
-	}
-
-	state->wb_req->extra_data.data[state->wb_req->extra_len] = 0;
-
-	subreq = recvall_send(
-		req, state->ev, state->fd, state->wb_req->extra_data.data,
-		state->wb_req->extra_len, 0);
-	if (async_req_nomem(subreq, req)) {
-		return;
-	}
-
-	subreq->async.fn = wb_req_read_extra;
-	subreq->async.priv = req;
-}
+	state->wb_req = (struct winbindd_request *)buf;
 
-static void wb_req_read_extra(struct async_req *subreq)
-{
-	struct async_req *req = talloc_get_type_abort(
-		subreq->async.priv, struct async_req);
-	int err;
-	ssize_t ret;
-
-	ret = recvall_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (ret < 0) {
-		async_req_error(req, map_wbc_err_from_errno(err));
-		return;
+	if (state->wb_req->extra_len != 0) {
+		state->wb_req->extra_data.data =
+			(char *)buf + sizeof(struct winbindd_request);
+	} else {
+		state->wb_req->extra_data.data = NULL;
 	}
 	async_req_done(req);
 }
 
-
 wbcErr wb_req_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
 			struct winbindd_request **preq)
 {