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420 lines
8.8 KiB
C++
420 lines
8.8 KiB
C++
#include <llarp/iwp/server.hpp>
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#include "str.hpp"
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llarp_link::llarp_link(const llarp_iwp_args& args)
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: router(args.router)
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, crypto(args.crypto)
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, logic(args.logic)
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, worker(args.cryptoworker)
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, keyfile(args.keyfile)
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, m_name("IWP")
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{
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iwp = llarp_async_iwp_new(crypto, logic, worker);
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pumpingLogic.store(false);
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}
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llarp_link::~llarp_link()
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{
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llarp_async_iwp_free(iwp);
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}
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bool
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llarp_link::has_intro_from(const llarp::Addr& from)
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{
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lock_t lock(m_PendingSessions_Mutex);
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return m_PendingSessions.find(from) != m_PendingSessions.end();
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}
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void
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llarp_link::remove_intro_from(const llarp::Addr& from)
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{
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lock_t lock(m_PendingSessions_Mutex);
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m_PendingSessions.erase(from);
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}
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void
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llarp_link::CloseSessionTo(const byte_t* pubkey)
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{
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llarp::Addr addr;
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llarp::PubKey pk(pubkey);
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{
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lock_t lock(m_Connected_Mutex);
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auto itr = m_Connected.find(pk);
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if(itr == m_Connected.end())
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return;
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addr = itr->second;
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}
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{
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lock_t lock(m_sessions_Mutex);
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auto itr = m_sessions.find(addr);
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if(itr != m_sessions.end())
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itr->second->close();
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}
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}
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void
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llarp_link::KeepAliveSessionTo(const byte_t* pubkey)
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{
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llarp::Addr addr;
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llarp::PubKey pk(pubkey);
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{
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lock_t lock(m_Connected_Mutex);
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auto itr = m_Connected.find(pk);
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if(itr == m_Connected.end())
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return;
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addr = itr->second;
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}
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{
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lock_t lock(m_sessions_Mutex);
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auto itr = m_sessions.find(addr);
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if(itr != m_sessions.end())
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itr->second->keepalive();
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}
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}
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void
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llarp_link::MapAddr(const llarp::Addr& src, const llarp::PubKey& identity)
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{
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lock_t lock(m_Connected_Mutex);
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m_Connected[identity] = src;
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}
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bool
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llarp_link::has_session_to(const byte_t* pubkey)
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{
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llarp::PubKey pk(pubkey);
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lock_t lock(m_Connected_Mutex);
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return m_Connected.find(pk) != m_Connected.end();
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}
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void
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llarp_link::TickSessions()
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{
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auto now = llarp_time_now_ms();
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{
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lock_t lock(m_PendingSessions_Mutex);
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auto itr = m_PendingSessions.begin();
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while(itr != m_PendingSessions.end())
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{
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if(itr->second->timedout(now))
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{
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itr = m_PendingSessions.erase(itr);
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}
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else
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++itr;
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}
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}
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{
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lock_t lock(m_sessions_Mutex);
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auto itr = m_sessions.begin();
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while(itr != m_sessions.end())
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{
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if(itr->second->Tick(now))
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{
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m_Connected.erase(itr->second->get_remote_router().pubkey);
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itr = m_sessions.erase(itr);
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}
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else
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++itr;
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}
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}
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}
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bool
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llarp_link::sendto(const byte_t* pubkey, llarp_buffer_t buf)
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{
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llarp_link_session* link = nullptr;
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{
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lock_t lock(m_Connected_Mutex);
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auto itr = m_Connected.find(pubkey);
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if(itr != m_Connected.end())
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{
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lock_t innerlock(m_sessions_Mutex);
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auto inner_itr = m_sessions.find(itr->second);
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if(inner_itr != m_sessions.end())
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{
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link = inner_itr->second.get();
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}
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}
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}
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return link && link->sendto(buf);
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}
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llarp_link_session*
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llarp_link::create_session(const llarp::Addr& src)
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{
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return new llarp_link_session(this, seckey, src);
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}
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bool
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llarp_link::has_session_via(const llarp::Addr& dst)
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{
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return m_sessions.find(dst) != m_sessions.end();
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}
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void
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llarp_link::pending_session_active(const llarp::Addr& addr)
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{
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lock_t lockpending(m_PendingSessions_Mutex);
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auto itr = m_PendingSessions.find(addr);
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if(itr == m_PendingSessions.end())
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return;
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itr->second->our_router = &router->rc;
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m_sessions.insert(std::make_pair(addr, std::move(itr->second)));
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m_PendingSessions.erase(itr);
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}
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void
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llarp_link::clear_sessions()
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{
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m_sessions.clear();
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}
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void
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llarp_link::PumpLogic()
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{
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auto now = llarp_time_now_ms();
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auto itr = m_sessions.begin();
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while(itr != m_sessions.end())
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{
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itr->second->TickLogic(now);
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++itr;
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}
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}
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const uint8_t*
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llarp_link::pubkey()
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{
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return llarp::seckey_topublic(seckey);
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}
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bool
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llarp_link::ensure_privkey()
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{
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llarp::LogDebug("ensure transport private key at ", keyfile);
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std::error_code ec;
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if(!fs::exists(keyfile, ec))
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{
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if(!keygen(keyfile.c_str()))
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return false;
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}
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std::ifstream f(keyfile);
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if(f.is_open())
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{
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f.read((char*)seckey.data(), seckey.size());
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return true;
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}
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return false;
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}
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bool
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llarp_link::keygen(const char* fname)
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{
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crypto->encryption_keygen(seckey);
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llarp::LogInfo("new transport key generated");
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std::ofstream f(fname);
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if(f.is_open())
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{
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f.write((char*)seckey.data(), seckey.size());
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return true;
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}
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return false;
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}
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void
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llarp_link::handle_cleanup_timer(void* l, uint64_t orig, uint64_t left)
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{
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if(left)
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return;
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llarp_link* link = static_cast< llarp_link* >(l);
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link->timeout_job_id = 0;
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link->TickSessions();
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link->issue_cleanup_timer(orig);
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}
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void
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llarp_link::visit_session(
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const llarp::Addr& fromaddr,
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std::function< void(const std::unique_ptr< llarp_link_session >&) > visit)
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{
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{
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auto itr = m_sessions.find(fromaddr);
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if(itr == m_sessions.end())
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{
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auto pitr = m_PendingSessions.find(fromaddr);
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if(pitr == m_PendingSessions.end())
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visit(m_PendingSessions
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.insert(std::make_pair(fromaddr,
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std::unique_ptr< llarp_link_session >(
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create_session(fromaddr))))
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.first->second);
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else
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visit(pitr->second);
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}
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else
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visit(itr->second);
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}
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}
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void
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llarp_link::handle_recvfrom(struct llarp_udp_io* udp,
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const struct sockaddr* saddr, const void* buf,
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ssize_t sz)
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{
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llarp_link* link = static_cast< llarp_link* >(udp->user);
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link->visit_session(
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*saddr, [buf, sz](const std::unique_ptr< llarp_link_session >& s) {
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s->recv(buf, sz);
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});
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}
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void
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llarp_link::cancel_timer()
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{
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if(timeout_job_id)
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{
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llarp_logic_cancel_call(logic, timeout_job_id);
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}
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timeout_job_id = 0;
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}
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void
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llarp_link::issue_cleanup_timer(uint64_t timeout)
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{
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timeout_job_id = llarp_logic_call_later(
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logic, {timeout, this, &llarp_link::handle_cleanup_timer});
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}
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void
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llarp_link::get_our_address(llarp::AddressInfo& addr)
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{
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addr.rank = 1;
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addr.dialect = "IWP";
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addr.pubkey = pubkey();
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addr.port = this->addr.port();
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memcpy(addr.ip.s6_addr, this->addr.addr6(), 16);
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}
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void
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llarp_link::after_recv(llarp_udp_io* udp)
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{
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llarp_link* self = static_cast< llarp_link* >(udp->user);
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llarp_logic_queue_job(
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self->logic,
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{self, [](void* u) { static_cast< llarp_link* >(u)->PumpLogic(); }});
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}
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bool
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llarp_link::configure(struct llarp_ev_loop* netloop, const char* ifname, int af,
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uint16_t port)
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{
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if(!ensure_privkey())
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{
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llarp::LogError("failed to ensure private key");
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return false;
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}
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llarp::LogDebug("configure link ifname=", ifname, " af=", af, " port=", port);
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// bind
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sockaddr_in ip4addr;
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sockaddr_in6 ip6addr;
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sockaddr* addr = nullptr;
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switch(af)
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{
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case AF_INET:
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addr = (sockaddr*)&ip4addr;
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llarp::Zero(addr, sizeof(ip4addr));
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break;
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case AF_INET6:
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addr = (sockaddr*)&ip6addr;
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llarp::Zero(addr, sizeof(ip6addr));
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break;
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// TODO: AF_PACKET
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default:
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llarp::LogError(__FILE__, "unsupported address family", af);
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return false;
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}
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addr->sa_family = af;
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if(!llarp::StrEq(ifname, "*"))
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{
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if(!llarp_getifaddr(ifname, af, addr))
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{
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llarp::LogError("failed to get address of network interface ", ifname);
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return false;
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}
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}
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else
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m_name = "OWP"; // outboundLink_name;
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switch(af)
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{
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case AF_INET:
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ip4addr.sin_port = htons(port);
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break;
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case AF_INET6:
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ip6addr.sin6_port = htons(port);
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break;
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// TODO: AF_PACKET
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default:
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return false;
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}
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this->addr = *addr;
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this->netloop = netloop;
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udp.recvfrom = &llarp_link::handle_recvfrom;
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udp.user = this;
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udp.tick = &llarp_link::after_recv;
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llarp::LogDebug("bind IWP link to ", addr);
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if(llarp_ev_add_udp(netloop, &udp, addr) == -1)
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{
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llarp::LogError("failed to bind to ", addr);
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return false;
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}
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return true;
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}
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bool
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llarp_link::start_link(struct llarp_logic* pLogic)
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{
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// give link implementations
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// link->parent = l;
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timeout_job_id = 0;
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this->logic = pLogic;
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// start cleanup timer
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issue_cleanup_timer(500);
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return true;
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}
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bool
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llarp_link::stop_link()
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{
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cancel_timer();
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llarp_ev_close_udp(&udp);
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clear_sessions();
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return true;
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}
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bool
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llarp_link::try_establish(struct llarp_link_establish_job* job)
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{
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llarp::Addr dst(job->ai);
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if(has_session_via(dst))
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return false;
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if(m_PendingSessions.find(dst) == m_PendingSessions.end())
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{
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llarp::LogDebug("establish session to ", dst);
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visit_session(dst, [job](const std::unique_ptr< llarp_link_session >& s) {
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s->establish_job = job;
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s->frame.alive(); // mark it alive
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s->introduce(job->ai.pubkey);
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});
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return true;
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}
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else
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return false;
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}
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