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/*
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 "tsocket.h"
#include "tsocket_internal.h"
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;
}
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