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authorStefan Metzmacher <metze@samba.org>2009-03-28 23:25:28 +0100
committerStefan Metzmacher <metze@samba.org>2009-04-02 21:53:59 +0200
commit85742dbc0651a3413e90afa18023cd55ae72e6db (patch)
treed2934a2b0d073d0192457854bcb2f7287c560fe5
parent8d98070a9f0a1a17d05e381b8e4c5a8f7a7e8233 (diff)
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tsocket: add tdgram_sendto_queue_send/recv()
metze
-rw-r--r--lib/tsocket/tsocket.c130
-rw-r--r--lib/tsocket/tsocket.h13
2 files changed, 143 insertions, 0 deletions
diff --git a/lib/tsocket/tsocket.c b/lib/tsocket/tsocket.c
index 922429a1c1..a8f3a3909b 100644
--- a/lib/tsocket/tsocket.c
+++ b/lib/tsocket/tsocket.c
@@ -493,3 +493,133 @@ int tdgram_disconnect_recv(struct tevent_req *req,
return ret;
}
+struct tdgram_sendto_queue_state {
+ /* this structs are owned by the caller */
+ struct {
+ struct tevent_context *ev;
+ struct tdgram_context *dgram;
+ const uint8_t *buf;
+ size_t len;
+ const struct tsocket_address *dst;
+ } caller;
+ ssize_t ret;
+};
+
+static void tdgram_sendto_queue_trigger(struct tevent_req *req,
+ void *private_data);
+static void tdgram_sendto_queue_done(struct tevent_req *subreq);
+
+/**
+ * @brief Queue a dgram blob for sending through the socket
+ * @param[in] mem_ctx The memory context for the result
+ * @param[in] ev The event context the operation should work on
+ * @param[in] dgram The tdgram_context to send the message buffer
+ * @param[in] queue The existing dgram queue
+ * @param[in] buf The message buffer
+ * @param[in] len The message length
+ * @param[in] dst The destination socket address
+ * @retval The async request handle
+ *
+ * This function queues a blob for sending to destination through an existing
+ * dgram socket. The async callback is triggered when the whole blob is
+ * delivered to the underlying system socket.
+ *
+ * The caller needs to make sure that all non-scalar input parameters hang
+ * arround for the whole lifetime of the request.
+ */
+struct tevent_req *tdgram_sendto_queue_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram,
+ struct tevent_queue *queue,
+ const uint8_t *buf,
+ size_t len,
+ struct tsocket_address *dst)
+{
+ struct tevent_req *req;
+ struct tdgram_sendto_queue_state *state;
+ bool ok;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_sendto_queue_state);
+ if (!req) {
+ return NULL;
+ }
+
+ state->caller.ev = ev;
+ state->caller.dgram = dgram;
+ state->caller.buf = buf;
+ state->caller.len = len;
+ state->caller.dst = dst;
+ state->ret = -1;
+
+ ok = tevent_queue_add(queue,
+ ev,
+ req,
+ tdgram_sendto_queue_trigger,
+ NULL);
+ if (!ok) {
+ tevent_req_nomem(NULL, req);
+ goto post;
+ }
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_sendto_queue_trigger(struct tevent_req *req,
+ void *private_data)
+{
+ struct tdgram_sendto_queue_state *state = tevent_req_data(req,
+ struct tdgram_sendto_queue_state);
+ struct tevent_req *subreq;
+
+ subreq = tdgram_sendto_send(state,
+ state->caller.ev,
+ state->caller.dgram,
+ state->caller.buf,
+ state->caller.len,
+ state->caller.dst);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, tdgram_sendto_queue_done, req);
+}
+
+static void tdgram_sendto_queue_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tdgram_sendto_queue_state *state = tevent_req_data(req,
+ struct tdgram_sendto_queue_state);
+ ssize_t ret;
+ int sys_errno;
+
+ ret = tdgram_sendto_recv(subreq, &sys_errno);
+ talloc_free(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+ssize_t tdgram_sendto_queue_recv(struct tevent_req *req, int *perrno)
+{
+ struct tdgram_sendto_queue_state *state = tevent_req_data(req,
+ struct tdgram_sendto_queue_state);
+ ssize_t ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
diff --git a/lib/tsocket/tsocket.h b/lib/tsocket/tsocket.h
index 077fd1ef35..ec891c34dd 100644
--- a/lib/tsocket/tsocket.h
+++ b/lib/tsocket/tsocket.h
@@ -259,5 +259,18 @@ struct tevent_req *tsocket_readv_send(struct tsocket_context *sock,
void *private_data);
int tsocket_readv_recv(struct tevent_req *req, int *perrno);
+/*
+ * Queue helpers
+ */
+
+struct tevent_req *tdgram_sendto_queue_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram,
+ struct tevent_queue *queue,
+ const uint8_t *buf,
+ size_t len,
+ struct tsocket_address *dst);
+ssize_t tdgram_sendto_queue_recv(struct tevent_req *req, int *perrno);
+
#endif /* _TSOCKET_H */