mirror of
https://github.com/oxen-io/lokinet.git
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142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/*
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* Copyright (c) 2010-2013 BitTorrent, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef __UTP_INTERNAL_H__
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#define __UTP_INTERNAL_H__
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#include <stdarg.h>
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#include <string.h>
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#include <assert.h>
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#include <stdio.h>
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#include "utp.h"
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#include "utp_callbacks.h"
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#include "utp_templates.h"
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#include "utp_hash.h"
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#include "utp_hash.h"
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#include "utp_packedsockaddr.h"
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/* These originally lived in utp_config.h */
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#define CCONTROL_TARGET (100 * 1000) // us
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enum bandwidth_type_t {
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payload_bandwidth, connect_overhead,
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close_overhead, ack_overhead,
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header_overhead, retransmit_overhead
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};
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#ifdef WIN32
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#ifdef _MSC_VER
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#include "libutp_inet_ntop.h"
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#endif
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// newer versions of MSVC define these in errno.h
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#ifndef ECONNRESET
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#define ECONNRESET WSAECONNRESET
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#define EMSGSIZE WSAEMSGSIZE
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#define ECONNREFUSED WSAECONNREFUSED
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#define ETIMEDOUT WSAETIMEDOUT
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#endif
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#endif
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struct PACKED_ATTRIBUTE RST_Info {
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PackedSockAddr addr;
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uint32 connid;
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uint16 ack_nr;
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uint64 timestamp;
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};
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// It's really important that we don't have duplicate keys in the hash table.
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// If we do, we'll eventually crash. if we try to remove the second instance
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// of the key, we'll accidentally remove the first instead. then later,
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// checkTimeouts will try to access the second one's already freed memory.
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void UTP_FreeAll(struct UTPSocketHT *utp_sockets);
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struct UTPSocketKey {
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PackedSockAddr addr;
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uint32 recv_id; // "conn_seed", "conn_id"
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UTPSocketKey(const PackedSockAddr& _addr, uint32 _recv_id) {
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memset(this, 0, sizeof(*this));
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addr = _addr;
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recv_id = _recv_id;
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}
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bool operator == (const UTPSocketKey &other) const {
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return recv_id == other.recv_id && addr == other.addr;
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}
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uint32 compute_hash() const {
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return recv_id ^ addr.compute_hash();
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}
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};
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struct UTPSocketKeyData {
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UTPSocketKey key;
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UTPSocket *socket;
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utp_link_t link;
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};
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#define UTP_SOCKET_BUCKETS 79
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#define UTP_SOCKET_INIT 15
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struct UTPSocketHT : utpHashTable<UTPSocketKey, UTPSocketKeyData> {
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UTPSocketHT() {
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const int buckets = UTP_SOCKET_BUCKETS;
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const int initial = UTP_SOCKET_INIT;
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this->Create(buckets, initial);
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}
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~UTPSocketHT() {
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UTP_FreeAll(this);
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this->Free();
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}
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};
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struct struct_utp_context {
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void *userdata;
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utp_callback_t* callbacks[UTP_ARRAY_SIZE];
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uint64 current_ms;
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utp_context_stats context_stats;
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UTPSocket *last_utp_socket;
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Array<UTPSocket*> ack_sockets;
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Array<RST_Info> rst_info;
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UTPSocketHT *utp_sockets;
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size_t target_delay;
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size_t opt_sndbuf;
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size_t opt_rcvbuf;
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uint64 last_check;
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struct_utp_context();
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~struct_utp_context();
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void log(int level, utp_socket *socket, char const *fmt, ...);
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void log_unchecked(utp_socket *socket, char const *fmt, ...);
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bool would_log(int level);
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bool log_normal:1; // log normal events?
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bool log_mtu:1; // log MTU related events?
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bool log_debug:1; // log debugging events? (Must also compile with UTP_DEBUG_LOGGING defined)
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};
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#endif //__UTP_INTERNAL_H__
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