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//
// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
// Copyright 2019 Devolutions <info@devolutions.net>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../../core/nng_impl.h"
#include "nng/nng.h"
#include "tls_common.h"
#include "tls_engine.h"
#include "tls_stream.h"
static void
tls_bio_stream_free(void *bio)
{
nng_stream_free(bio);
}
static void
tls_bio_stream_stop(void *bio)
{
nng_stream_stop(bio);
}
static void
tls_bio_stream_close(void *bio)
{
nng_stream_close(bio);
}
static void
tls_bio_stream_send(void *bio, nng_aio *aio)
{
nng_stream_send(bio, aio);
}
static void
tls_bio_stream_recv(void *bio, nng_aio *aio)
{
nng_stream_recv(bio, aio);
}
static const nni_tls_bio_ops tls_stream_bio = {
.bio_send = tls_bio_stream_send,
.bio_recv = tls_bio_stream_recv,
.bio_free = tls_bio_stream_free,
.bio_stop = tls_bio_stream_stop,
.bio_close = tls_bio_stream_close,
};
static void
tls_stream_reap(void *arg)
{
tls_stream *ts = arg;
nni_tls_fini(&ts->conn);
NNI_FREE_STRUCT(ts);
}
static nni_reap_list tls_stream_reap_list = {
.rl_offset = offsetof(tls_stream, reap),
.rl_func = tls_stream_reap,
};
void
nni_tls_stream_free(void *arg)
{
tls_stream *ts = arg;
nni_reap(&tls_stream_reap_list, ts);
}
static void
tls_stream_stop(void *arg)
{
tls_stream *ts = arg;
nni_tls_stop(&ts->conn);
}
static void
tls_stream_close(void *arg)
{
tls_stream *ts = arg;
nni_tls_close(&ts->conn);
}
static void
tls_stream_send(void *arg, nng_aio *aio)
{
tls_stream *ts = arg;
nni_tls_send(&ts->conn, aio);
}
static void
tls_stream_recv(void *arg, nng_aio *aio)
{
tls_stream *ts = arg;
nni_tls_recv(&ts->conn, aio);
}
static void
tls_stream_conn_cb(void *arg)
{
tls_stream *ts = arg;
nng_stream *bio;
int rv;
nng_sockaddr sa;
if ((rv = nni_aio_result(&ts->conn_aio)) != 0) {
nni_aio_finish_error(ts->user_aio, rv);
nni_tls_stream_free(ts);
return;
}
bio = nni_aio_get_output(&ts->conn_aio, 0);
if ((rv = nng_stream_get_addr(bio, NNG_OPT_REMADDR, &sa)) != 0) {
nni_aio_finish_error(ts->user_aio, rv);
nni_tls_stream_free(ts);
return;
};
if ((rv = nni_tls_start(&ts->conn, &tls_stream_bio, bio, &sa)) != 0) {
// NB: if this fails, it *will* have set the bio either way.
// So nni_tls_stream_free will also free the bio.
nni_aio_finish_error(ts->user_aio, rv);
nni_tls_stream_free(ts);
return;
}
nni_aio_set_output(ts->user_aio, 0, &ts->stream);
nni_aio_finish(ts->user_aio, 0, 0);
}
static nng_err tls_stream_get(
void *arg, const char *name, void *buf, size_t *szp, nni_type t);
static nng_err tls_stream_peer_cert(void *arg, nng_tls_cert **);
int
nni_tls_stream_alloc(tls_stream **tsp, nng_tls_config *cfg, nng_aio *user_aio)
{
tls_stream *ts;
size_t size;
int rv;
size = NNI_ALIGN_UP(sizeof(*ts)) +
NNI_ALIGN_UP(nni_tls_engine_conn_size());
if ((ts = nni_zalloc(size)) == NULL) {
return (NNG_ENOMEM);
}
ts->user_aio = user_aio;
// NB: free is exposed for benefit of dialer/listener
ts->stream.s_free = nni_tls_stream_free;
ts->stream.s_close = tls_stream_close;
ts->stream.s_stop = tls_stream_stop;
ts->stream.s_send = tls_stream_send;
ts->stream.s_recv = tls_stream_recv;
ts->stream.s_get = tls_stream_get;
ts->stream.s_peer_cert = tls_stream_peer_cert;
nni_aio_init(&ts->conn_aio, tls_stream_conn_cb, ts);
if ((rv = nni_tls_init(&ts->conn, cfg)) != 0) {
nni_tls_stream_free(ts);
return (rv);
}
*tsp = ts;
return (0);
}
static nng_err
tls_get_verified(void *arg, void *buf, size_t *szp, nni_type t)
{
tls_stream *ts = arg;
return (nni_copyout_bool(nni_tls_verified(&ts->conn), buf, szp, t));
}
static nng_err
tls_get_peer_cn(void *arg, void *buf, size_t *szp, nni_type t)
{
NNI_ARG_UNUSED(szp);
if (t != NNI_TYPE_STRING) {
return (NNG_EBADTYPE);
}
tls_stream *ts = arg;
*(char **) buf = (char *) nni_tls_peer_cn(&ts->conn);
return (NNG_OK);
}
static nng_err
tls_stream_peer_cert(void *arg, nng_tls_cert **certp)
{
tls_stream *ts = arg;
return (nni_tls_peer_cert(&ts->conn, certp));
}
static const nni_option tls_stream_options[] = {
{
.o_name = NNG_OPT_TLS_VERIFIED,
.o_get = tls_get_verified,
},
{
.o_name = NNG_OPT_TLS_PEER_CN,
.o_get = tls_get_peer_cn,
},
{
.o_name = NULL,
},
};
static nng_err
tls_stream_get(void *arg, const char *name, void *buf, size_t *szp, nni_type t)
{
tls_stream *ts = arg;
nng_err rv;
if ((rv = nni_stream_get(ts->conn.bio, name, buf, szp, t)) !=
NNG_ENOTSUP) {
return (rv);
}
return (nni_getopt(tls_stream_options, name, ts, buf, szp, t));
}
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