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/*
* SRT - Secure, Reliable, Transport
* Copyright (c) 2018 Haivision Systems Inc.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#ifndef INC_SRT_SOCKETOPTIONS_HPP
#define INC_SRT_SOCKETOPTIONS_HPP
#include <string>
#include <map>
#include <set>
#include <vector>
#include "../srtcore/srt.h" // Devel path
#ifdef _WIN32
#include "winsock2.h"
#endif
struct OptionValue
{
std::string s;
union {
int i;
int64_t l;
bool b;
};
const void* value = nullptr;
size_t size = 0;
};
extern const std::set<std::string> false_names, true_names;
struct SocketOption
{
enum Type { STRING = 0, INT, INT64, BOOL, ENUM };
enum Binding { PRE = 0, POST };
enum Domain { SYSTEM, SRT };
enum Mode {FAILURE = -1, LISTENER = 0, CALLER = 1, RENDEZVOUS = 2};
static const char* const mode_names [3];
std::string name;
int protocol;
int symbol;
Binding binding;
Type type;
const std::map<std::string, int>* valmap;
template <Domain D, typename Object = int>
bool apply(Object socket, std::string value) const;
template <Domain D, Type T, typename Object = int>
bool applyt(Object socket, std::string value) const;
template <Domain D, typename Object>
static int setso(Object socket, int protocol, int symbol, const void* data, size_t size);
template<Type T>
bool extract(std::string value, OptionValue& val) const;
};
template<>
inline int SocketOption::setso<SocketOption::SRT, int>(int socket, int /*ignored*/, int sym, const void* data, size_t size)
{
return srt_setsockopt(socket, 0, SRT_SOCKOPT(sym), data, (int) size);
}
#if ENABLE_BONDING
template<>
inline int SocketOption::setso<SocketOption::SRT, SRT_SOCKOPT_CONFIG*>(SRT_SOCKOPT_CONFIG* obj, int /*ignored*/, int sym, const void* data, size_t size)
{
return srt_config_add(obj, SRT_SOCKOPT(sym), data, (int) size);
}
#endif
template<>
inline int SocketOption::setso<SocketOption::SYSTEM, int>(int socket, int proto, int sym, const void* data, size_t size)
{
return ::setsockopt(socket, proto, sym, (const char *)data, (int) size);
}
template<>
inline bool SocketOption::extract<SocketOption::STRING>(std::string value, OptionValue& o) const
{
o.s = value;
o.value = o.s.data();
o.size = o.s.size();
return true;
}
template<>
inline bool SocketOption::extract<SocketOption::INT>(std::string value, OptionValue& o) const
{
try
{
o.i = stoi(value, 0, 0);
o.value = &o.i;
o.size = sizeof o.i;
return true;
}
catch (...) // stoi throws
{
return false; // do not change o
}
return false;
}
template<>
inline bool SocketOption::extract<SocketOption::INT64>(std::string value, OptionValue& o) const
{
try
{
long long vall = stoll(value);
o.l = vall; // int64_t resolves to either 'long long', or 'long' being 64-bit integer
o.value = &o.l;
o.size = sizeof o.l;
return true;
}
catch (...) // stoll throws
{
return false;
}
return false;
}
template<>
inline bool SocketOption::extract<SocketOption::BOOL>(std::string value, OptionValue& o) const
{
bool val;
if ( false_names.count(value) )
val = false;
else if ( true_names.count(value) )
val = true;
else
return false;
o.b = val;
o.value = &o.b;
o.size = sizeof o.b;
return true;
}
template<>
inline bool SocketOption::extract<SocketOption::ENUM>(std::string value, OptionValue& o) const
{
if (valmap)
{
// Search value in the map. If found, set to o.
auto p = valmap->find(value);
if ( p != valmap->end() )
{
o.i = p->second;
o.value = &o.i;
o.size = sizeof o.i;
return true;
}
}
// Fallback: try interpreting it as integer.
try
{
o.i = stoi(value, 0, 0);
o.value = &o.i;
o.size = sizeof o.i;
return true;
}
catch (...) // stoi throws
{
return false; // do not change o
}
return false;
}
template <SocketOption::Domain D, SocketOption::Type T, typename Object>
inline bool SocketOption::applyt(Object socket, std::string value) const
{
OptionValue o; // common meet point
int result = -1;
if (extract<T>(value, o))
result = setso<D>(socket, protocol, symbol, o.value, o.size);
return result != -1;
}
template<SocketOption::Domain D, typename Object>
inline bool SocketOption::apply(Object socket, std::string value) const
{
switch ( type )
{
#define SRT_HANDLE_TYPE(ty) case ty: return applyt<D, ty, Object>(socket, value)
SRT_HANDLE_TYPE(STRING);
SRT_HANDLE_TYPE(INT);
SRT_HANDLE_TYPE(INT64);
SRT_HANDLE_TYPE(BOOL);
SRT_HANDLE_TYPE(ENUM);
#undef SRT_HANDLE_TYPE
}
return false;
}
extern const std::map<std::string, int> enummap_transtype;
namespace {
const SocketOption srt_options [] {
{ "transtype", 0, SRTO_TRANSTYPE, SocketOption::PRE, SocketOption::ENUM, &enummap_transtype },
{ "maxbw", 0, SRTO_MAXBW, SocketOption::POST, SocketOption::INT64, nullptr},
{ "pbkeylen", 0, SRTO_PBKEYLEN, SocketOption::PRE, SocketOption::INT, nullptr},
{ "passphrase", 0, SRTO_PASSPHRASE, SocketOption::PRE, SocketOption::STRING, nullptr},
{ "mss", 0, SRTO_MSS, SocketOption::PRE, SocketOption::INT, nullptr},
{ "fc", 0, SRTO_FC, SocketOption::PRE, SocketOption::INT, nullptr},
{ "sndbuf", 0, SRTO_SNDBUF, SocketOption::PRE, SocketOption::INT, nullptr},
{ "rcvbuf", 0, SRTO_RCVBUF, SocketOption::PRE, SocketOption::INT, nullptr},
// linger option is handled outside of the common loop, therefore commented out.
//{ "linger", 0, SRTO_LINGER, SocketOption::PRE, SocketOption::INT, nullptr},
{ "ipttl", 0, SRTO_IPTTL, SocketOption::PRE, SocketOption::INT, nullptr},
{ "iptos", 0, SRTO_IPTOS, SocketOption::PRE, SocketOption::INT, nullptr},
{ "inputbw", 0, SRTO_INPUTBW, SocketOption::POST, SocketOption::INT64, nullptr},
{ "mininputbw", 0, SRTO_MININPUTBW, SocketOption::POST, SocketOption::INT64, nullptr},
{ "oheadbw", 0, SRTO_OHEADBW, SocketOption::POST, SocketOption::INT, nullptr},
{ "latency", 0, SRTO_LATENCY, SocketOption::PRE, SocketOption::INT, nullptr},
{ "tsbpdmode", 0, SRTO_TSBPDMODE, SocketOption::PRE, SocketOption::BOOL, nullptr},
{ "tlpktdrop", 0, SRTO_TLPKTDROP, SocketOption::PRE, SocketOption::BOOL, nullptr},
{ "snddropdelay", 0, SRTO_SNDDROPDELAY, SocketOption::POST, SocketOption::INT, nullptr},
{ "nakreport", 0, SRTO_NAKREPORT, SocketOption::PRE, SocketOption::BOOL, nullptr},
{ "conntimeo", 0, SRTO_CONNTIMEO, SocketOption::PRE, SocketOption::INT, nullptr},
{ "drifttracer", 0, SRTO_DRIFTTRACER, SocketOption::POST, SocketOption::BOOL, nullptr},
{ "lossmaxttl", 0, SRTO_LOSSMAXTTL, SocketOption::POST, SocketOption::INT, nullptr},
{ "rcvlatency", 0, SRTO_RCVLATENCY, SocketOption::PRE, SocketOption::INT, nullptr},
{ "peerlatency", 0, SRTO_PEERLATENCY, SocketOption::PRE, SocketOption::INT, nullptr},
{ "minversion", 0, SRTO_MINVERSION, SocketOption::PRE, SocketOption::INT, nullptr},
{ "streamid", 0, SRTO_STREAMID, SocketOption::PRE, SocketOption::STRING, nullptr},
{ "congestion", 0, SRTO_CONGESTION, SocketOption::PRE, SocketOption::STRING, nullptr},
{ "messageapi", 0, SRTO_MESSAGEAPI, SocketOption::PRE, SocketOption::BOOL, nullptr},
{ "payloadsize", 0, SRTO_PAYLOADSIZE, SocketOption::PRE, SocketOption::INT, nullptr},
{ "kmrefreshrate", 0, SRTO_KMREFRESHRATE, SocketOption::PRE, SocketOption::INT, nullptr },
{ "kmpreannounce", 0, SRTO_KMPREANNOUNCE, SocketOption::PRE, SocketOption::INT, nullptr },
{ "enforcedencryption", 0, SRTO_ENFORCEDENCRYPTION, SocketOption::PRE, SocketOption::BOOL, nullptr },
{ "ipv6only", 0, SRTO_IPV6ONLY, SocketOption::PRE, SocketOption::INT, nullptr },
{ "peeridletimeo", 0, SRTO_PEERIDLETIMEO, SocketOption::PRE, SocketOption::INT, nullptr },
{ "packetfilter", 0, SRTO_PACKETFILTER, SocketOption::PRE, SocketOption::STRING, nullptr },
#if ENABLE_BONDING
{ "groupconnect", 0, SRTO_GROUPCONNECT, SocketOption::PRE, SocketOption::INT, nullptr},
{ "groupminstabletimeo", 0, SRTO_GROUPMINSTABLETIMEO, SocketOption::PRE, SocketOption::INT, nullptr},
#endif
#ifdef SRT_ENABLE_BINDTODEVICE
{ "bindtodevice", 0, SRTO_BINDTODEVICE, SocketOption::PRE, SocketOption::STRING, nullptr},
#endif
{ "retransmitalgo", 0, SRTO_RETRANSMITALGO, SocketOption::PRE, SocketOption::INT, nullptr }
#ifdef ENABLE_AEAD_API_PREVIEW
,{ "cryptomode", 0, SRTO_CRYPTOMODE, SocketOption::PRE, SocketOption::INT, nullptr }
#endif
#ifdef ENABLE_MAXREXMITBW
,{ "maxrexmitbw", 0, SRTO_MAXREXMITBW, SocketOption::POST, SocketOption::INT64, nullptr }
#endif
};
}
SocketOption::Mode SrtInterpretMode(const std::string& modestr, const std::string& host, const std::string& adapter);
SocketOption::Mode SrtConfigurePre(SRTSOCKET socket, std::string host, std::map<std::string, std::string> options, std::vector<std::string>* failures = 0);
void SrtConfigurePost(SRTSOCKET socket, std::map<std::string, std::string> options, std::vector<std::string>* failures = 0);
#endif
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