lib/tsocket: add tsocket_sendto_send/recv()

metze

lib/tsocket/config.mk

@@ -5,7 +5,8 @@ LIBTSOCKET_OBJ_FILES = $(addprefix ../lib/tsocket/, \
 					tsocket.o \
 					tsocket_helpers.o \
 					tsocket_bsd.o \
-					tsocket_recvfrom.o)
+					tsocket_recvfrom.o \
+					tsocket_sendto.o)
 
 PUBLIC_HEADERS += $(addprefix ../lib/tsocket/, \
 				 tsocket.h\

lib/tsocket/tsocket.h

@@ -172,5 +172,12 @@ ssize_t tsocket_recvfrom_recv(struct tevent_req *req,
 			      uint8_t **buf,
 			      struct tsocket_address **src);
 
+struct tevent_req *tsocket_sendto_send(struct tsocket_context *sock,
+				       TALLOC_CTX *mem_ctx,
+				       const uint8_t *buf,
+				       size_t len,
+				       const struct tsocket_address *dst);
+ssize_t tsocket_sendto_recv(struct tevent_req *req, int *perrno);
+
 #endif /* _TSOCKET_H */
 

lib/tsocket/tsocket_sendto.c

@@ -0,0 +1,136 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Stefan Metzmacher 2009
+
+     ** NOTE! The following LGPL license applies to the tevent
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/network.h"
+#include "tsocket.h"
+#include "tsocket_internal.h"
+
+struct tsocket_sendto_state {
+	/* this structs are owned by the caller */
+	struct {
+		struct tsocket_context *sock;
+		const uint8_t *buf;
+		size_t len;
+		const struct tsocket_address *dst;
+	} caller;
+
+	ssize_t ret;
+};
+
+static int tsocket_sendto_state_destructor(struct tsocket_sendto_state *state)
+{
+	if (state->caller.sock) {
+		tsocket_set_writeable_handler(state->caller.sock, NULL, NULL);
+	}
+	ZERO_STRUCT(state->caller);
+
+	return 0;
+}
+
+static void tsocket_sendto_handler(struct tsocket_context *sock,
+				   void *private_data);
+
+struct tevent_req *tsocket_sendto_send(struct tsocket_context *sock,
+				       TALLOC_CTX *mem_ctx,
+				       const uint8_t *buf,
+				       size_t len,
+				       const struct tsocket_address *dst)
+{
+	struct tevent_req *req;
+	struct tsocket_sendto_state *state;
+	int ret;
+	int err;
+	bool dummy;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct tsocket_sendto_state);
+	if (!req) {
+		return NULL;
+	}
+
+	state->caller.sock	= sock;
+	state->caller.buf	= buf;
+	state->caller.len	= len;
+	state->caller.dst	= dst;
+	state->ret		= -1;
+
+	talloc_set_destructor(state, tsocket_sendto_state_destructor);
+
+	ret = tsocket_set_writeable_handler(sock,
+					    tsocket_sendto_handler,
+					    req);
+	err = tsocket_error_from_errno(ret, errno, &dummy);
+	if (tevent_req_error(req, err)) {
+		goto post;
+	}
+
+	return req;
+
+ post:
+	return tevent_req_post(req, sock->event.ctx);
+}
+
+static void tsocket_sendto_handler(struct tsocket_context *sock,
+				   void *private_data)
+{
+	struct tevent_req *req = talloc_get_type(private_data,
+				 struct tevent_req);
+	struct tsocket_sendto_state *state = tevent_req_data(req,
+					     struct tsocket_sendto_state);
+	ssize_t ret;
+	int err;
+	bool retry;
+
+	ret = tsocket_sendto(state->caller.sock,
+			     state->caller.buf,
+			     state->caller.len,
+			     state->caller.dst);
+	err = tsocket_error_from_errno(ret, errno, &retry);
+	if (retry) {
+		/* retry later */
+		return;
+	}
+	if (tevent_req_error(req, err)) {
+		return;
+	}
+
+	state->ret = ret;
+
+	tevent_req_done(req);
+}
+
+ssize_t tsocket_sendto_recv(struct tevent_req *req, int *perrno)
+{
+	struct tsocket_sendto_state *state = tevent_req_data(req,
+					     struct tsocket_sendto_state);
+	ssize_t ret;
+
+	ret = tsocket_simple_int_recv(req, perrno);
+	if (ret == 0) {
+		ret = state->ret;
+	}
+
+	tevent_req_received(req);
+	return ret;
+}