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Builds out the full v1 scope: a vendored+patched openscreen subset for low-latency Cast Streaming (Mirroring receiver 0F5096E8) alongside the existing Cast V2/HLS and new DLNA/AVTransport casting paths, breadcastd's Idle/Casting state machine with a private IPC socket, the breadcast GTK4 popup as a thin IPC client, and bread.cast.*/bread.command.cast.* breadd integration (device discovery, start/stop, mirroring lifecycle events). Also adds bakery/systemd/Forgejo CI packaging. Validated end-to-end against a real Chromecast/Google TV: negotiated Cast Streaming session, live pipeline playback, and daemon+GUI click-to-cast/ stop through the actual popup.
61 lines
2.4 KiB
C++
61 lines
2.4 KiB
C++
// Copyright 2019 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef UTIL_CRYPTO_OPENSSL_UTIL_H_
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#define UTIL_CRYPTO_OPENSSL_UTIL_H_
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#include <stddef.h>
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#include <cstring>
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#include "platform/base/error.h"
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#include "platform/base/location.h"
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// LOCAL PATCH (breadcast): dropped SSLErrorCodeToError()/GetSSLError(),
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// which format an SSL_get_error() result and reference BoringSSL's
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// SSL_error_description() (not part of system OpenSSL's public API). Unused
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// here -- the TLS CASTV2 control channel is handled by the existing
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// rust_cast-based Rust code, not this vendored openscreen subset, which only
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// needs the general ERR_*/AES pieces. See vendor/openscreen/PATCHES.md.
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namespace openscreen {
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// Initialize OpenSSL if it isn't already initialized. This must be called
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// before any other OpenSSL functions though it is safe and cheap to call this
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// multiple times.
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// This function is thread-safe, and OpenSSL will only ever be initialized once.
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// OpenSSL will be properly shut down on program exit.
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// Multiple sequential calls to EnsureOpenSSLInit or EnsureOpenSSLCleanup are
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// ignored by OpenSSL itself.
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void EnsureOpenSSLInit();
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// Drains the OpenSSL ERR_get_error stack. On a debug build the error codes
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// are send to VLOG(1), on a release build they are disregarded. In most
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// cases you should pass CURRENT_LOCATION as the `location`.
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void ClearOpenSSLERRStack(const Location& location);
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// Place an instance of this class on the call stack to automatically clear
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// the OpenSSL error stack on function exit.
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class OpenSSLErrStackTracer {
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public:
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// Pass CURRENT_LOCATION as `location`, to help track the source of OpenSSL
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// error messages. Note any diagnostic emitted will be tagged with the
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// location of the constructor call as it's not possible to trace a
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// destructor's callsite.
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explicit OpenSSLErrStackTracer(const Location& location)
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: location_(location) {
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EnsureOpenSSLInit();
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}
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OpenSSLErrStackTracer(const OpenSSLErrStackTracer&) = delete;
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OpenSSLErrStackTracer(OpenSSLErrStackTracer&&) noexcept = delete;
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OpenSSLErrStackTracer& operator=(const OpenSSLErrStackTracer&) = delete;
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OpenSSLErrStackTracer& operator=(OpenSSLErrStackTracer&&) = delete;
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~OpenSSLErrStackTracer() { ClearOpenSSLERRStack(location_); }
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private:
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const Location location_;
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};
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} // namespace openscreen
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#endif // UTIL_CRYPTO_OPENSSL_UTIL_H_
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