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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2020 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* C++ classes for Secure Streams - file transaction
*/
#include <libwebsockets.hxx>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
static lws_ss_state_return_t
lssfile_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
{
lssFile *lf = (lssFile *)userobj_to_lss(userobj);
return lf->write(buf, len, flags);
}
static lws_ss_state_return_t
lssfile_tx(void *userobj, lws_ss_tx_ordinal_t ord,uint8_t *buf, size_t *len,
int *flags)
{
/*
* TODO: we don't know how to send things yet
*/
return LWSSSSRET_TX_DONT_SEND;
}
static lws_ss_state_return_t
lssfile_state(void *userobj, void *h_src, lws_ss_constate_t state,
lws_ss_tx_ordinal_t ack)
{
lssFile *lf = (lssFile *)userobj_to_lss(userobj);
lwsl_info("%s: state %s\n", __func__, lws_ss_state_name(state));
switch (state) {
/*
* These reflect some kind of final disposition for the transaction,
* that we want to report along with the completion. If no other chance
* we'll report DESTROYING
*/
case LWSSSCS_DESTROYING:
case LWSSSCS_ALL_RETRIES_FAILED:
case LWSSSCS_QOS_ACK_REMOTE:
case LWSSSCS_QOS_NACK_REMOTE:
lf->call_completion(state);
if (state == LWSSSCS_DESTROYING) {
/*
* we get DESTROYING because we are already in the
* middle of destroying the m_ss, unlink the C++ lss
* from the ss handle so it won't recursively try to
* destroy it
*/
lf->m_ss = NULL;
delete lf;
}
break;
}
return LWSSSSRET_OK;
}
lws_ss_state_return_t lssFile::write(const uint8_t *buf, size_t len, int flags)
{
if (fd == LWS_INVALID_FILE) {
fd = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0640);
if (fd == LWS_INVALID_FILE)
return LWSSSSRET_DESTROY_ME;
}
if (::write(fd, buf, len) != len) {
close(fd);
fd = LWS_INVALID_FILE;
return LWSSSSRET_DESTROY_ME;
}
rxlen += len;
if (flags & LWSSS_FLAG_EOM) {
close(fd);
fd = LWS_INVALID_FILE;
}
return LWSSSSRET_OK;
}
lssFile::lssFile(lws_ctx_t ctx, std::string uri, std::string _path,
lsscomp_t comp, bool _psh) :
lss(ctx, uri, comp, _psh, lssfile_rx, lssfile_tx, lssfile_state)
{
path = _path;
push = _psh;
fd = LWS_INVALID_FILE;
}
lssFile::~lssFile()
{
if (fd == LWS_INVALID_FILE)
return;
close(fd);
fd = LWS_INVALID_FILE;
}
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