mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-15 12:13:24 +00:00
788 lines
17 KiB
C++
788 lines
17 KiB
C++
#include <ev/ev_libuv.hpp>
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#include <net/net_addr.hpp>
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#include <cstring>
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namespace libuv
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{
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struct glue
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{
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virtual ~glue() = default;
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virtual void
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Close() = 0;
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};
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/// tcp connection glue between llarp and libuv
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struct conn_glue : public glue
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{
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uv_tcp_t m_Handle;
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uv_connect_t m_Connect;
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uv_check_t m_Ticker;
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llarp_tcp_connecter* const m_TCP;
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llarp_tcp_acceptor* const m_Accept;
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llarp_tcp_conn m_Conn;
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llarp::Addr m_Addr;
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std::deque< std::vector< char > > m_WriteQueue;
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conn_glue(uv_loop_t* loop, llarp_tcp_connecter* tcp, const sockaddr* addr)
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: m_TCP(tcp), m_Accept(nullptr), m_Addr(*addr)
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{
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m_Connect.data = this;
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m_Handle.data = this;
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m_TCP->impl = this;
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uv_tcp_init(loop, &m_Handle);
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m_Ticker.data = this;
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uv_check_init(loop, &m_Ticker);
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m_Conn.close = &ExplicitClose;
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m_Conn.write = &ExplicitWrite;
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}
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conn_glue(uv_loop_t* loop, llarp_tcp_acceptor* tcp, const sockaddr* addr)
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: m_TCP(nullptr), m_Accept(tcp), m_Addr(*addr)
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{
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m_Connect.data = nullptr;
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m_Handle.data = this;
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uv_tcp_init(loop, &m_Handle);
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m_Ticker.data = this;
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uv_check_init(loop, &m_Ticker);
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m_Accept->close = &ExplicitCloseAccept;
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m_Conn.write = nullptr;
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m_Conn.closed = nullptr;
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}
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conn_glue(conn_glue* parent) : m_TCP(nullptr), m_Accept(nullptr)
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{
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m_Connect.data = nullptr;
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m_Conn.close = &ExplicitClose;
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m_Conn.write = &ExplicitWrite;
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m_Handle.data = this;
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uv_tcp_init(parent->m_Handle.loop, &m_Handle);
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m_Ticker.data = this;
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uv_check_init(parent->m_Handle.loop, &m_Ticker);
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}
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static void
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OnOutboundConnect(uv_connect_t* c, int status)
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{
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auto* self = static_cast< conn_glue* >(c->data);
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self->HandleConnectResult(status);
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c->data = nullptr;
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}
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bool
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ConnectAsync()
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{
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return uv_tcp_connect(&m_Connect, &m_Handle, m_Addr, &OnOutboundConnect)
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!= -1;
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}
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static void
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ExplicitClose(llarp_tcp_conn* conn)
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{
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static_cast< conn_glue* >(conn->impl)->Close();
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}
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static void
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ExplicitCloseAccept(llarp_tcp_acceptor* tcp)
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{
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static_cast< conn_glue* >(tcp->impl)->Close();
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}
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static ssize_t
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ExplicitWrite(llarp_tcp_conn* conn, const byte_t* ptr, size_t sz)
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{
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return static_cast< conn_glue* >(conn->impl)->WriteAsync((char*)ptr, sz);
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}
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static void
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OnRead(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf)
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{
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if(nread >= 0)
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static_cast< conn_glue* >(stream->data)->Read(buf->base, nread);
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else if(nread < 0)
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static_cast< conn_glue* >(stream->data)->Close();
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delete[] buf->base;
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}
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static void
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Alloc(uv_handle_t*, size_t suggested_size, uv_buf_t* buf)
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{
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buf->base = new char[suggested_size];
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buf->len = suggested_size;
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}
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void
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Read(const char* ptr, ssize_t sz)
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{
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if(m_Conn.read)
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{
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llarp::LogDebug("tcp read ", sz, " bytes");
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const llarp_buffer_t buf(ptr, sz);
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m_Conn.read(&m_Conn, buf);
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}
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}
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void
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HandleConnectResult(int status)
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{
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if(m_TCP && m_TCP->connected)
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{
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if(status == 0)
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{
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m_Conn.impl = this;
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m_Conn.loop = m_TCP->loop;
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m_Conn.close = &ExplicitClose;
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m_Conn.write = &ExplicitWrite;
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m_TCP->connected(m_TCP, &m_Conn);
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Start();
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}
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else if(m_TCP->error)
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{
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llarp::LogError("failed to connect tcp ", uv_strerror(status));
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m_TCP->error(m_TCP);
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}
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}
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}
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void
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WriteFail()
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{
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if(m_Conn.close)
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m_Conn.close(&m_Conn);
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}
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uv_stream_t*
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Stream()
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{
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return (uv_stream_t*)&m_Handle;
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}
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static void
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OnWritten(uv_write_t* req, int status)
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{
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if(status)
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{
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llarp::LogError("write failed on tcp: ", uv_strerror(status));
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static_cast< conn_glue* >(req->data)->Close();
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}
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else
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static_cast< conn_glue* >(req->data)->DrainOne();
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delete req;
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}
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void
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DrainOne()
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{
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m_WriteQueue.pop_front();
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}
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int
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WriteAsync(char* data, size_t sz)
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{
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m_WriteQueue.emplace_back(sz);
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std::copy_n(data, sz, m_WriteQueue.back().begin());
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auto buf = uv_buf_init(m_WriteQueue.back().data(), sz);
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auto* req = new uv_write_t();
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req->data = this;
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return uv_write(req, Stream(), &buf, 1, &OnWritten) == 0 ? sz : 0;
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}
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static void
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OnClosed(uv_handle_t* h)
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{
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static_cast< conn_glue* >(h->data)->HandleClosed();
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}
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static void
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FullClose(uv_handle_t* h)
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{
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auto* self = static_cast< conn_glue* >(h->data);
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h->data = nullptr;
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delete self;
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llarp::LogDebug("deleted");
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}
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void
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HandleClosed()
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{
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m_Handle.data = nullptr;
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if(m_Accept)
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{
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if(m_Accept->closed)
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m_Accept->closed(m_Accept);
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m_Accept->impl = nullptr;
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}
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if(m_Conn.closed)
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{
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m_Conn.closed(&m_Conn);
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}
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m_Conn.impl = nullptr;
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llarp::LogDebug("closed");
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uv_close((uv_handle_t*)&m_Ticker, &FullClose);
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}
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static void
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OnShutdown(uv_shutdown_t* shut, int code)
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{
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llarp::LogDebug("shut down ", code);
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auto* self = static_cast< conn_glue* >(shut->data);
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uv_close((uv_handle_t*)&self->m_Handle, &OnClosed);
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delete shut;
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}
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void
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Close() override
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{
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llarp::LogDebug("close tcp connection");
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uv_check_stop(&m_Ticker);
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uv_read_stop(Stream());
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auto* shut = new uv_shutdown_t();
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shut->data = this;
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uv_shutdown(shut, Stream(), &OnShutdown);
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}
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static void
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OnAccept(uv_stream_t* stream, int status)
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{
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if(status == 0)
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{
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static_cast< conn_glue* >(stream->data)->Accept();
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}
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else
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{
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llarp::LogError("tcp accept failed: ", uv_strerror(status));
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}
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}
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static void
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OnTick(uv_check_t* t)
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{
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static_cast< conn_glue* >(t->data)->Tick();
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}
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void
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Tick()
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{
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if(m_Accept && m_Accept->tick)
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m_Accept->tick(m_Accept);
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if(m_Conn.tick)
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m_Conn.tick(&m_Conn);
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}
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void
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Start()
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{
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auto result = uv_check_start(&m_Ticker, &OnTick);
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if(result)
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llarp::LogError("failed to start timer ", uv_strerror(result));
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result = uv_read_start(Stream(), &Alloc, &OnRead);
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if(result)
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llarp::LogError("failed to start reader ", uv_strerror(result));
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}
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void
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Accept()
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{
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if(m_Accept && m_Accept->accepted)
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{
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auto* child = new conn_glue(this);
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llarp::LogDebug("accepted new connection");
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child->m_Conn.impl = child;
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child->m_Conn.loop = m_Accept->loop;
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child->m_Conn.close = &ExplicitClose;
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child->m_Conn.write = &ExplicitWrite;
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auto res = uv_accept(Stream(), child->Stream());
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if(res)
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{
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llarp::LogError("failed to accept tcp connection ", uv_strerror(res));
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child->Close();
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return;
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}
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m_Accept->accepted(m_Accept, &child->m_Conn);
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child->Start();
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}
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}
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bool
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Server()
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{
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m_Accept->close = &ExplicitCloseAccept;
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return uv_tcp_bind(&m_Handle, m_Addr, 0) == 0
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&& uv_listen(Stream(), 5, &OnAccept) == 0;
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}
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};
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struct udp_glue : public glue
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{
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uv_udp_t m_Handle;
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uv_check_t m_Ticker;
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llarp_udp_io* const m_UDP;
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llarp::Addr m_Addr;
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bool gotpkts;
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udp_glue(uv_loop_t* loop, llarp_udp_io* udp, const sockaddr* src)
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: m_UDP(udp), m_Addr(*src)
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{
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m_Handle.data = this;
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m_Ticker.data = this;
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gotpkts = false;
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uv_udp_init(loop, &m_Handle);
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uv_check_init(loop, &m_Ticker);
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}
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static void
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Alloc(uv_handle_t*, size_t suggested_size, uv_buf_t* buf)
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{
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buf->base = new char[suggested_size];
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buf->len = suggested_size;
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}
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static void
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OnRecv(uv_udp_t* handle, ssize_t nread, const uv_buf_t* buf,
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const struct sockaddr* addr, unsigned)
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{
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if(addr)
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static_cast< udp_glue* >(handle->data)->RecvFrom(nread, buf, addr);
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delete[] buf->base;
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}
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void
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RecvFrom(ssize_t sz, const uv_buf_t* buf, const struct sockaddr* fromaddr)
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{
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if(sz >= 0 && m_UDP && m_UDP->recvfrom)
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{
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const size_t pktsz = sz;
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const llarp_buffer_t pkt{(const byte_t*)buf->base, pktsz};
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m_UDP->recvfrom(m_UDP, fromaddr, ManagedBuffer{pkt});
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gotpkts = true;
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}
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}
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static void
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OnTick(uv_check_t* t)
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{
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static_cast< udp_glue* >(t->data)->Tick();
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}
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void
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Tick()
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{
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if(m_UDP && m_UDP->tick)
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m_UDP->tick(m_UDP);
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gotpkts = false;
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}
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static int
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SendTo(llarp_udp_io* udp, const sockaddr* to, const byte_t* ptr, size_t sz)
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{
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auto* self = static_cast< udp_glue* >(udp->impl);
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if(self == nullptr)
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return -1;
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uv_buf_t buf = uv_buf_init((char*)ptr, sz);
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return uv_udp_try_send(&self->m_Handle, &buf, 1, to);
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}
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bool
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Bind()
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{
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auto ret = uv_udp_bind(&m_Handle, m_Addr, 0);
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if(ret)
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{
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llarp::LogError("failed to bind to ", m_Addr, " ", uv_strerror(ret));
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return false;
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}
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if(uv_udp_recv_start(&m_Handle, &Alloc, &OnRecv))
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{
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llarp::LogError("failed to start recving packets via ", m_Addr);
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return false;
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}
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if(uv_check_start(&m_Ticker, &OnTick))
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{
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llarp::LogError("failed to start ticker");
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return false;
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}
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if(uv_fileno((const uv_handle_t*)&m_Handle, &m_UDP->fd))
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return false;
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m_UDP->sendto = &SendTo;
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return true;
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}
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static void
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OnClosed(uv_handle_t* h)
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{
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auto* glue = static_cast< udp_glue* >(h->data);
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if(glue)
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{
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h->data = nullptr;
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glue->m_UDP->impl = nullptr;
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delete glue;
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}
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}
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void
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Close() override
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{
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uv_check_stop(&m_Ticker);
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uv_close((uv_handle_t*)&m_Handle, &OnClosed);
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}
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};
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struct pipe_glue : public glue
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{
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byte_t m_Buffer[1024 * 8];
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llarp_ev_pkt_pipe* const m_Pipe;
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pipe_glue(uv_loop_t* loop, llarp_ev_pkt_pipe* pipe) : m_Pipe(pipe)
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{
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m_Handle.data = this;
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m_Ticker.data = this;
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uv_poll_init(loop, &m_Handle, m_Pipe->fd);
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uv_check_init(loop, &m_Ticker);
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}
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void
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Tick()
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{
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m_Pipe->tick();
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}
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static void
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OnRead(uv_poll_t* handle, int status, int)
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{
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if(status)
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{
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return;
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}
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pipe_glue* glue = static_cast< pipe_glue* >(handle->data);
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int r = glue->m_Pipe->read(glue->m_Buffer, sizeof(glue->m_Buffer));
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if(r <= 0)
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return;
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const llarp_buffer_t buf{glue->m_Buffer, size_t{r}};
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glue->m_Pipe->OnRead(buf);
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}
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static void
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OnClosed(uv_handle_t* h)
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{
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auto* self = static_cast< pipe_glue* >(h->data);
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if(self)
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{
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h->data = nullptr;
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delete self;
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}
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}
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void
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Close() override
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{
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uv_check_stop(&m_Ticker);
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uv_close((uv_handle_t*)&m_Handle, &OnClosed);
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}
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static void
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OnTick(uv_check_t* h)
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{
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static_cast< pipe_glue* >(h->data)->Tick();
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}
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bool
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Start()
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{
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if(uv_poll_start(&m_Handle, UV_READABLE, &OnRead))
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return false;
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if(uv_check_start(&m_Ticker, &OnTick))
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return false;
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return true;
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}
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uv_poll_t m_Handle;
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uv_check_t m_Ticker;
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};
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struct tun_glue : public glue
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{
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uv_poll_t m_Handle;
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uv_check_t m_Ticker;
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llarp_tun_io* const m_Tun;
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device* const m_Device;
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byte_t m_Buffer[1500];
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bool readpkt;
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tun_glue(llarp_tun_io* tun) : m_Tun(tun), m_Device(tuntap_init())
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{
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m_Handle.data = this;
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m_Ticker.data = this;
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readpkt = false;
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}
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~tun_glue() override
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{
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tuntap_destroy(m_Device);
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}
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static void
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OnTick(uv_check_t* timer)
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{
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static_cast< tun_glue* >(timer->data)->Tick();
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}
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static void
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OnPoll(uv_poll_t* h, int, int events)
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{
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if(events & UV_READABLE)
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{
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static_cast< tun_glue* >(h->data)->Read();
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}
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}
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void
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Read()
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{
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auto sz = tuntap_read(m_Device, m_Buffer, sizeof(m_Buffer));
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if(sz > 0)
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{
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llarp::LogDebug("tun read ", sz);
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llarp_buffer_t pkt(m_Buffer, sz);
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if(m_Tun && m_Tun->recvpkt)
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m_Tun->recvpkt(m_Tun, pkt);
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}
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}
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void
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Tick()
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{
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if(m_Tun->before_write)
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m_Tun->before_write(m_Tun);
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if(m_Tun->tick)
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m_Tun->tick(m_Tun);
|
|
}
|
|
|
|
static void
|
|
OnClosed(uv_handle_t* h)
|
|
{
|
|
auto* self = static_cast< tun_glue* >(h->data);
|
|
if(self)
|
|
{
|
|
self->m_Tun->impl = nullptr;
|
|
h->data = nullptr;
|
|
delete self;
|
|
}
|
|
}
|
|
|
|
void
|
|
Close() override
|
|
{
|
|
uv_check_stop(&m_Ticker);
|
|
uv_close((uv_handle_t*)&m_Handle, &OnClosed);
|
|
}
|
|
|
|
bool
|
|
Write(const byte_t* pkt, size_t sz)
|
|
{
|
|
return tuntap_write(m_Device, (void*)pkt, sz) != -1;
|
|
}
|
|
|
|
static bool
|
|
WritePkt(llarp_tun_io* tun, const byte_t* pkt, size_t sz)
|
|
{
|
|
return static_cast< tun_glue* >(tun->impl)->Write(pkt, sz);
|
|
}
|
|
|
|
bool
|
|
Init(uv_loop_t* loop)
|
|
{
|
|
memcpy(m_Device->if_name, m_Tun->ifname, sizeof(m_Device->if_name));
|
|
if(tuntap_start(m_Device, TUNTAP_MODE_TUNNEL, 0) == -1)
|
|
{
|
|
llarp::LogError("failed to start up ", m_Tun->ifname);
|
|
return false;
|
|
}
|
|
if(tuntap_set_ip(m_Device, m_Tun->ifaddr, m_Tun->ifaddr, m_Tun->netmask)
|
|
== -1)
|
|
{
|
|
llarp::LogError("failed to set address on ", m_Tun->ifname);
|
|
return false;
|
|
}
|
|
if(tuntap_up(m_Device) == -1)
|
|
{
|
|
llarp::LogError("failed to put up ", m_Tun->ifname);
|
|
return false;
|
|
}
|
|
if(m_Device->tun_fd == -1)
|
|
{
|
|
llarp::LogError("tun interface ", m_Tun->ifname,
|
|
" has invalid fd: ", m_Device->tun_fd);
|
|
return false;
|
|
}
|
|
if(uv_poll_init(loop, &m_Handle, m_Device->tun_fd) == -1)
|
|
{
|
|
llarp::LogError("failed to start polling on ", m_Tun->ifname);
|
|
return false;
|
|
}
|
|
if(uv_poll_start(&m_Handle, UV_READABLE, &OnPoll))
|
|
{
|
|
llarp::LogError("failed to start polling on ", m_Tun->ifname);
|
|
return false;
|
|
}
|
|
if(uv_check_init(loop, &m_Ticker) != 0
|
|
|| uv_check_start(&m_Ticker, &OnTick) != 0)
|
|
{
|
|
llarp::LogError("failed to set up tun interface timer for ",
|
|
m_Tun->ifname);
|
|
return false;
|
|
}
|
|
m_Tun->writepkt = &WritePkt;
|
|
return true;
|
|
}
|
|
};
|
|
|
|
bool
|
|
Loop::init()
|
|
{
|
|
m_Impl.reset(uv_loop_new());
|
|
if(uv_loop_init(m_Impl.get()) == -1)
|
|
return false;
|
|
uv_loop_configure(m_Impl.get(), UV_LOOP_BLOCK_SIGNAL, SIGPIPE);
|
|
m_TickTimer.data = this;
|
|
m_Run.store(true);
|
|
return uv_timer_init(m_Impl.get(), &m_TickTimer) != -1;
|
|
}
|
|
|
|
void
|
|
Loop::update_time()
|
|
{
|
|
uv_update_time(m_Impl.get());
|
|
}
|
|
|
|
bool
|
|
Loop::running() const
|
|
{
|
|
return m_Run.load();
|
|
}
|
|
|
|
llarp_time_t
|
|
Loop::time_now() const
|
|
{
|
|
return llarp::time_now_ms();
|
|
}
|
|
|
|
bool
|
|
Loop::tcp_connect(llarp_tcp_connecter* tcp, const sockaddr* addr)
|
|
{
|
|
auto* impl = new conn_glue(m_Impl.get(), tcp, addr);
|
|
tcp->impl = impl;
|
|
if(impl->ConnectAsync())
|
|
return true;
|
|
delete impl;
|
|
tcp->impl = nullptr;
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
OnTickTimeout(uv_timer_t* timer)
|
|
{
|
|
uv_stop(timer->loop);
|
|
}
|
|
|
|
int
|
|
Loop::tick(int ms)
|
|
{
|
|
uv_timer_start(&m_TickTimer, &OnTickTimeout, ms, 0);
|
|
uv_run(m_Impl.get(), UV_RUN_ONCE);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
Loop::stop()
|
|
{
|
|
uv_stop(m_Impl.get());
|
|
llarp::LogInfo("stopping event loop");
|
|
m_Run.store(false);
|
|
CloseAll();
|
|
}
|
|
|
|
void
|
|
Loop::CloseAll()
|
|
{
|
|
llarp::LogInfo("Closing all handles");
|
|
uv_walk(
|
|
m_Impl.get(),
|
|
[](uv_handle_t* h, void*) {
|
|
if(uv_is_closing(h))
|
|
return;
|
|
if(h->data && uv_is_active(h))
|
|
{
|
|
static_cast< glue* >(h->data)->Close();
|
|
}
|
|
},
|
|
nullptr);
|
|
}
|
|
|
|
void
|
|
Loop::stopped()
|
|
{
|
|
tick(50);
|
|
llarp::LogInfo("we have stopped");
|
|
}
|
|
|
|
bool
|
|
Loop::udp_listen(llarp_udp_io* udp, const sockaddr* src)
|
|
{
|
|
auto* impl = new udp_glue(m_Impl.get(), udp, src);
|
|
udp->impl = impl;
|
|
if(impl->Bind())
|
|
{
|
|
return true;
|
|
}
|
|
delete impl;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Loop::udp_close(llarp_udp_io* udp)
|
|
{
|
|
if(udp == nullptr)
|
|
return false;
|
|
auto* glue = static_cast< udp_glue* >(udp->impl);
|
|
if(glue == nullptr)
|
|
return false;
|
|
glue->Close();
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Loop::tun_listen(llarp_tun_io* tun)
|
|
{
|
|
auto* glue = new tun_glue(tun);
|
|
tun->impl = glue;
|
|
if(glue->Init(m_Impl.get()))
|
|
{
|
|
return true;
|
|
}
|
|
delete glue;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Loop::tcp_listen(llarp_tcp_acceptor* tcp, const sockaddr* addr)
|
|
{
|
|
auto* glue = new conn_glue(m_Impl.get(), tcp, addr);
|
|
tcp->impl = glue;
|
|
if(glue->Server())
|
|
return true;
|
|
tcp->impl = nullptr;
|
|
delete glue;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Loop::add_pipe(llarp_ev_pkt_pipe* p)
|
|
{
|
|
auto* glue = new pipe_glue(m_Impl.get(), p);
|
|
if(glue->Start())
|
|
return true;
|
|
delete glue;
|
|
return false;
|
|
}
|
|
|
|
} // namespace libuv
|