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/*
* Copyright 2013 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.
*/
#include "p2p/base/transport_description.h"
#include "absl/strings/ascii.h"
#include "absl/strings/match.h"
#include "p2p/base/p2p_constants.h"
#include "rtc_base/arraysize.h"
#include "rtc_base/logging.h"
#include "rtc_base/strings/string_builder.h"
using webrtc::RTCError;
using webrtc::RTCErrorOr;
using webrtc::RTCErrorType;
namespace cricket {
namespace {
bool IsIceChar(char c) {
// Note: '-', '=', '#' and '_' are *not* valid ice-chars but temporarily
// permitted in order to allow external software to upgrade.
if (c == '-' || c == '=' || c == '#' || c == '_') {
RTC_LOG(LS_WARNING)
<< "'-', '=', '#' and '-' are not valid ice-char and thus not "
<< "permitted in ufrag or pwd. This is a protocol violation that "
<< "is permitted to allow upgrading but will be rejected in "
<< "the future. See https://crbug.com/1053756";
return true;
}
return absl::ascii_isalnum(c) || c == '+' || c == '/';
}
RTCError ValidateIceUfrag(absl::string_view raw_ufrag) {
if (!(ICE_UFRAG_MIN_LENGTH <= raw_ufrag.size() &&
raw_ufrag.size() <= ICE_UFRAG_MAX_LENGTH)) {
rtc::StringBuilder sb;
sb << "ICE ufrag must be between " << ICE_UFRAG_MIN_LENGTH << " and "
<< ICE_UFRAG_MAX_LENGTH << " characters long.";
return RTCError(RTCErrorType::SYNTAX_ERROR, sb.Release());
}
if (!absl::c_all_of(raw_ufrag, IsIceChar)) {
return RTCError(
RTCErrorType::SYNTAX_ERROR,
"ICE ufrag must contain only alphanumeric characters, '+', and '/'.");
}
return RTCError::OK();
}
RTCError ValidateIcePwd(absl::string_view raw_pwd) {
if (!(ICE_PWD_MIN_LENGTH <= raw_pwd.size() &&
raw_pwd.size() <= ICE_PWD_MAX_LENGTH)) {
rtc::StringBuilder sb;
sb << "ICE pwd must be between " << ICE_PWD_MIN_LENGTH << " and "
<< ICE_PWD_MAX_LENGTH << " characters long.";
return RTCError(RTCErrorType::SYNTAX_ERROR, sb.Release());
}
if (!absl::c_all_of(raw_pwd, IsIceChar)) {
return RTCError(
RTCErrorType::SYNTAX_ERROR,
"ICE pwd must contain only alphanumeric characters, '+', and '/'.");
}
return RTCError::OK();
}
} // namespace
RTCErrorOr<IceParameters> IceParameters::Parse(absl::string_view raw_ufrag,
absl::string_view raw_pwd) {
IceParameters parameters(std::string(raw_ufrag), std::string(raw_pwd),
/* renomination= */ false);
auto result = parameters.Validate();
if (!result.ok()) {
return result;
}
return parameters;
}
RTCError IceParameters::Validate() const {
// For legacy protocols.
// TODO(zhihuang): Remove this once the legacy protocol is no longer
// supported.
if (ufrag.empty() && pwd.empty()) {
return RTCError::OK();
}
auto ufrag_result = ValidateIceUfrag(ufrag);
if (!ufrag_result.ok()) {
return ufrag_result;
}
auto pwd_result = ValidateIcePwd(pwd);
if (!pwd_result.ok()) {
return pwd_result;
}
return RTCError::OK();
}
bool StringToConnectionRole(const std::string& role_str, ConnectionRole* role) {
const char* const roles[] = {
CONNECTIONROLE_ACTIVE_STR, CONNECTIONROLE_PASSIVE_STR,
CONNECTIONROLE_ACTPASS_STR, CONNECTIONROLE_HOLDCONN_STR};
for (size_t i = 0; i < arraysize(roles); ++i) {
if (absl::EqualsIgnoreCase(roles[i], role_str)) {
*role = static_cast<ConnectionRole>(CONNECTIONROLE_ACTIVE + i);
return true;
}
}
return false;
}
bool ConnectionRoleToString(const ConnectionRole& role, std::string* role_str) {
switch (role) {
case cricket::CONNECTIONROLE_ACTIVE:
*role_str = cricket::CONNECTIONROLE_ACTIVE_STR;
break;
case cricket::CONNECTIONROLE_ACTPASS:
*role_str = cricket::CONNECTIONROLE_ACTPASS_STR;
break;
case cricket::CONNECTIONROLE_PASSIVE:
*role_str = cricket::CONNECTIONROLE_PASSIVE_STR;
break;
case cricket::CONNECTIONROLE_HOLDCONN:
*role_str = cricket::CONNECTIONROLE_HOLDCONN_STR;
break;
default:
return false;
}
return true;
}
TransportDescription::TransportDescription()
: ice_mode(ICEMODE_FULL), connection_role(CONNECTIONROLE_NONE) {}
TransportDescription::TransportDescription(
const std::vector<std::string>& transport_options,
const std::string& ice_ufrag,
const std::string& ice_pwd,
IceMode ice_mode,
ConnectionRole role,
const rtc::SSLFingerprint* identity_fingerprint)
: transport_options(transport_options),
ice_ufrag(ice_ufrag),
ice_pwd(ice_pwd),
ice_mode(ice_mode),
connection_role(role),
identity_fingerprint(CopyFingerprint(identity_fingerprint)) {}
TransportDescription::TransportDescription(const std::string& ice_ufrag,
const std::string& ice_pwd)
: ice_ufrag(ice_ufrag),
ice_pwd(ice_pwd),
ice_mode(ICEMODE_FULL),
connection_role(CONNECTIONROLE_NONE) {}
TransportDescription::TransportDescription(const TransportDescription& from)
: transport_options(from.transport_options),
ice_ufrag(from.ice_ufrag),
ice_pwd(from.ice_pwd),
ice_mode(from.ice_mode),
connection_role(from.connection_role),
identity_fingerprint(CopyFingerprint(from.identity_fingerprint.get())) {}
TransportDescription::~TransportDescription() = default;
TransportDescription& TransportDescription::operator=(
const TransportDescription& from) {
// Self-assignment
if (this == &from)
return *this;
transport_options = from.transport_options;
ice_ufrag = from.ice_ufrag;
ice_pwd = from.ice_pwd;
ice_mode = from.ice_mode;
connection_role = from.connection_role;
identity_fingerprint.reset(CopyFingerprint(from.identity_fingerprint.get()));
return *this;
}
} // namespace cricket
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