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/*
* Copyright 2012 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef P2P_BASE_TRANSPORT_DESCRIPTION_H_
#define P2P_BASE_TRANSPORT_DESCRIPTION_H_
#include <memory>
#include <string>
#include <vector>
#include "absl/algorithm/container.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "api/rtc_error.h"
#include "p2p/base/p2p_constants.h"
#include "rtc_base/ssl_fingerprint.h"
#include "rtc_base/system/rtc_export.h"
namespace cricket {
// SEC_ENABLED and SEC_REQUIRED should only be used if the session
// was negotiated over TLS, to protect the inline crypto material
// exchange.
// SEC_DISABLED: No crypto in outgoing offer, ignore any supplied crypto.
// SEC_ENABLED: Crypto in outgoing offer and answer (if supplied in offer).
// SEC_REQUIRED: Crypto in outgoing offer and answer. Fail any offer with absent
// or unsupported crypto.
// TODO(deadbeef): Remove this or rename it to something more appropriate, like
// SdesPolicy.
enum SecurePolicy { SEC_DISABLED, SEC_ENABLED, SEC_REQUIRED };
// Whether our side of the call is driving the negotiation, or the other side.
enum IceRole { ICEROLE_CONTROLLING = 0, ICEROLE_CONTROLLED, ICEROLE_UNKNOWN };
// ICE RFC 5245 implementation type.
enum IceMode {
ICEMODE_FULL, // As defined in http://tools.ietf.org/html/rfc5245#section-4.1
ICEMODE_LITE // As defined in http://tools.ietf.org/html/rfc5245#section-4.2
};
// RFC 4145 - http://tools.ietf.org/html/rfc4145#section-4
// 'active': The endpoint will initiate an outgoing connection.
// 'passive': The endpoint will accept an incoming connection.
// 'actpass': The endpoint is willing to accept an incoming
// connection or to initiate an outgoing connection.
enum ConnectionRole {
CONNECTIONROLE_NONE = 0,
CONNECTIONROLE_ACTIVE,
CONNECTIONROLE_PASSIVE,
CONNECTIONROLE_ACTPASS,
CONNECTIONROLE_HOLDCONN,
};
struct IceParameters {
// Constructs an IceParameters from a user-provided ufrag/pwd combination.
// Returns a SyntaxError if the ufrag or pwd are malformed.
static RTC_EXPORT webrtc::RTCErrorOr<IceParameters> Parse(
absl::string_view raw_ufrag,
absl::string_view raw_pwd);
// TODO(honghaiz): Include ICE mode in this structure to match the ORTC
// struct:
// http://ortc.org/wp-content/uploads/2016/03/ortc.html#idl-def-RTCIceParameters
std::string ufrag;
std::string pwd;
bool renomination = false;
IceParameters() = default;
IceParameters(absl::string_view ice_ufrag,
absl::string_view ice_pwd,
bool ice_renomination)
: ufrag(ice_ufrag), pwd(ice_pwd), renomination(ice_renomination) {}
bool operator==(const IceParameters& other) const {
return ufrag == other.ufrag && pwd == other.pwd &&
renomination == other.renomination;
}
bool operator!=(const IceParameters& other) const {
return !(*this == other);
}
// Validate IceParameters, returns a SyntaxError if the ufrag or pwd are
// malformed.
webrtc::RTCError Validate() const;
};
extern const char CONNECTIONROLE_ACTIVE_STR[];
extern const char CONNECTIONROLE_PASSIVE_STR[];
extern const char CONNECTIONROLE_ACTPASS_STR[];
extern const char CONNECTIONROLE_HOLDCONN_STR[];
constexpr auto* ICE_OPTION_TRICKLE = "trickle";
constexpr auto* ICE_OPTION_RENOMINATION = "renomination";
absl::optional<ConnectionRole> StringToConnectionRole(
absl::string_view role_str);
bool ConnectionRoleToString(const ConnectionRole& role, std::string* role_str);
struct TransportDescription {
TransportDescription();
TransportDescription(const std::vector<std::string>& transport_options,
absl::string_view ice_ufrag,
absl::string_view ice_pwd,
IceMode ice_mode,
ConnectionRole role,
const rtc::SSLFingerprint* identity_fingerprint);
TransportDescription(absl::string_view ice_ufrag, absl::string_view ice_pwd);
TransportDescription(const TransportDescription& from);
~TransportDescription();
TransportDescription& operator=(const TransportDescription& from);
// TODO(deadbeef): Rename to HasIceOption, etc.
bool HasOption(absl::string_view option) const {
return absl::c_linear_search(transport_options, option);
}
void AddOption(absl::string_view option) {
transport_options.emplace_back(option);
}
bool secure() const { return identity_fingerprint != nullptr; }
IceParameters GetIceParameters() const {
return IceParameters(ice_ufrag, ice_pwd,
HasOption(ICE_OPTION_RENOMINATION));
}
static rtc::SSLFingerprint* CopyFingerprint(const rtc::SSLFingerprint* from) {
if (!from)
return NULL;
return new rtc::SSLFingerprint(*from);
}
// These are actually ICE options (appearing in the ice-options attribute in
// SDP).
// TODO(deadbeef): Rename to ice_options.
std::vector<std::string> transport_options;
std::string ice_ufrag;
std::string ice_pwd;
IceMode ice_mode;
ConnectionRole connection_role;
std::unique_ptr<rtc::SSLFingerprint> identity_fingerprint;
};
} // namespace cricket
#endif // P2P_BASE_TRANSPORT_DESCRIPTION_H_
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