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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2019 - 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.
*
* This is the glue that wires up raw-socket to Secure Streams.
*/
#include <private-lib-core.h>
int
secstream_raw(struct lws *wsi, enum lws_callback_reasons reason, void *user,
void *in, size_t len)
{
#if defined(LWS_WITH_SERVER)
struct lws_context_per_thread *pt = &wsi->a.context->pt[(int)wsi->tsi];
#endif
lws_ss_handle_t *h = (lws_ss_handle_t *)lws_get_opaque_user_data(wsi);
uint8_t buf[LWS_PRE + 1520], *p = &buf[LWS_PRE],
*end = &buf[sizeof(buf) - 1];
lws_ss_state_return_t r;
size_t buflen;
int f = 0;
switch (reason) {
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
assert(h);
assert(h->policy);
lwsl_info("%s: %s, %s CLIENT_CONNECTION_ERROR: %s\n", __func__,
lws_ss_tag(h), h->policy->streamtype, in ? (char *)in : "(null)");
#if defined(LWS_WITH_CONMON)
lws_conmon_ss_json(h);
#endif
r = lws_ss_event_helper(h, LWSSSCS_UNREACHABLE);
if (r == LWSSSSRET_DESTROY_ME)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
h->wsi = NULL;
r = lws_ss_backoff(h);
if (r != LWSSSSRET_OK)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
break;
case LWS_CALLBACK_RAW_CLOSE:
if (!h)
break;
lws_sul_cancel(&h->sul_timeout);
#if defined(LWS_WITH_CONMON)
lws_conmon_ss_json(h);
#endif
lwsl_info("%s: %s, %s RAW_CLOSE\n", __func__, lws_ss_tag(h),
h->policy ? h->policy->streamtype : "no policy");
h->wsi = NULL;
#if defined(LWS_WITH_SERVER)
lws_pt_lock(pt, __func__);
lws_dll2_remove(&h->cli_list);
lws_pt_unlock(pt);
#endif
/* wsi is going down anyway */
r = lws_ss_event_helper(h, LWSSSCS_DISCONNECTED);
if (r == LWSSSSRET_DESTROY_ME)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
if (h->policy && !(h->policy->flags & LWSSSPOLF_OPPORTUNISTIC) &&
#if defined(LWS_WITH_SERVER)
!(h->info.flags & LWSSSINFLAGS_ACCEPTED) && /* not server */
#endif
!h->txn_ok && !wsi->a.context->being_destroyed) {
r = lws_ss_backoff(h);
if (r != LWSSSSRET_OK)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
break;
}
break;
case LWS_CALLBACK_RAW_CONNECTED:
lwsl_info("%s: RAW_CONNECTED\n", __func__);
h->retry = 0;
h->seqstate = SSSEQ_CONNECTED;
lws_sul_cancel(&h->sul);
#if defined(LWS_WITH_SYS_METRICS)
/*
* If any hanging caliper measurement, dump it, and free any tags
*/
lws_metrics_caliper_report_hist(h->cal_txn, (struct lws *)NULL);
#endif
r = lws_ss_event_helper(h, LWSSSCS_CONNECTED);
if (r != LWSSSSRET_OK)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
lws_validity_confirmed(wsi);
break;
case LWS_CALLBACK_RAW_ADOPT:
lwsl_info("%s: RAW_ADOPT\n", __func__);
break;
/* chunks of chunked content, with header removed */
case LWS_CALLBACK_RAW_RX:
if (!h || !h->info.rx)
return 0;
r = h->info.rx(ss_to_userobj(h), (const uint8_t *)in, len, 0);
if (r != LWSSSSRET_OK)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
return 0; /* don't passthru */
case LWS_CALLBACK_RAW_WRITEABLE:
lwsl_info("%s: RAW_WRITEABLE\n", __func__);
if (!h || !h->info.tx)
return 0;
buflen = lws_ptr_diff_size_t(end, p);
r = h->info.tx(ss_to_userobj(h), h->txord++, p, &buflen, &f);
if (r == LWSSSSRET_TX_DONT_SEND)
return 0;
if (r < 0)
return _lws_ss_handle_state_ret_CAN_DESTROY_HANDLE(r, wsi, &h);
/*
* flags are ignored with raw, there are no protocol payload
* boundaries, just an arbitrarily-fragmented bytestream
*/
p += buflen;
if (lws_write(wsi, buf + LWS_PRE, lws_ptr_diff_size_t(p, buf + LWS_PRE),
LWS_WRITE_HTTP) != lws_ptr_diff(p, buf + LWS_PRE)) {
lwsl_err("%s: write failed\n", __func__);
return -1;
}
lws_set_timeout(wsi, 0, 0);
break;
default:
break;
}
return 0;
}
static int
secstream_connect_munge_raw(lws_ss_handle_t *h, char *buf, size_t len,
struct lws_client_connect_info *i,
union lws_ss_contemp *ct)
{
i->method = "RAW";
return 0;
}
const struct lws_protocols protocol_secstream_raw = {
"lws-secstream-raw",
secstream_raw,
0,
0,
0, NULL, 0
};
const struct ss_pcols ss_pcol_raw = {
"raw",
"",
&protocol_secstream_raw,
secstream_connect_munge_raw,
NULL, NULL
};
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