feat: 完成 M2 mosh（LAN + tsnet 端到端验证）
- mosh(blinksh/ios C++)+protobuf-lite 交叉编译为 MoshCore.xcframework （CommonCrypto 后端、含 arm64 模拟器 slice；绕 autotools 用 CMake 直编 + 手写 config.h） - tsnet 桥新增 UDP relay（StartMoshRelay：loopback↔tsnet.Dial 逐包搬运） - MoshSession（pipe↔FILE*/pthread/SIGWINCH）+ MoshConnectScanner（TXCore，+4 单测=39） - SSHTerminalModel 编排：SSH 引导 mosh-server→解析 MOSH CONNECT→relay→mosh 接管 - LAN 直连 + mosh-over-tsnet 均端到端验证通过，R1(tsnet UDP 数据报语义) 证伪 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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vendor/mosh/src/network/network.h
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vendor/mosh/src/network/network.h
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/*
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Mosh: the mobile shell
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Copyright 2012 Keith Winstein
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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In addition, as a special exception, the copyright holders give
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permission to link the code of portions of this program with the
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OpenSSL library under certain conditions as described in each
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individual source file, and distribute linked combinations including
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the two.
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You must obey the GNU General Public License in all respects for all
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of the code used other than OpenSSL. If you modify file(s) with this
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exception, you may extend this exception to your version of the
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file(s), but you are not obligated to do so. If you do not wish to do
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so, delete this exception statement from your version. If you delete
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this exception statement from all source files in the program, then
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also delete it here.
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*/
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#ifndef NETWORK_HPP
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#define NETWORK_HPP
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#include <stdint.h>
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#include <deque>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string>
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#include <math.h>
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#include <vector>
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#include <assert.h>
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#include <exception>
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#include <string.h>
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#include "crypto.h"
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using namespace Crypto;
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namespace Network {
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static const unsigned int MOSH_PROTOCOL_VERSION = 2; /* bumped for echo-ack */
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uint64_t timestamp( void );
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uint16_t timestamp16( void );
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uint16_t timestamp_diff( uint16_t tsnew, uint16_t tsold );
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class NetworkException : public std::exception {
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public:
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string function;
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int the_errno;
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private:
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string my_what;
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public:
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NetworkException( string s_function="<none>", int s_errno=0)
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: function( s_function ), the_errno( s_errno ),
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my_what(function + ": " + strerror(the_errno)) {}
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const char *what() const throw () { return my_what.c_str(); }
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~NetworkException() throw () {}
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};
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enum Direction {
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TO_SERVER = 0,
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TO_CLIENT = 1
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};
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class Packet {
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public:
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uint64_t seq;
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Direction direction;
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uint16_t timestamp, timestamp_reply;
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string payload;
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Packet( uint64_t s_seq, Direction s_direction,
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uint16_t s_timestamp, uint16_t s_timestamp_reply, string s_payload )
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: seq( s_seq ), direction( s_direction ),
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timestamp( s_timestamp ), timestamp_reply( s_timestamp_reply ), payload( s_payload )
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{}
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Packet( string coded_packet, Session *session );
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string tostring( Session *session );
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};
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union Addr {
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struct sockaddr sa;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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struct sockaddr_storage ss;
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};
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class Connection {
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private:
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static const int DEFAULT_SEND_MTU = 1300;
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static const uint64_t MIN_RTO = 50; /* ms */
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static const uint64_t MAX_RTO = 1000; /* ms */
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static const int PORT_RANGE_LOW = 60001;
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static const int PORT_RANGE_HIGH = 60999;
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static const unsigned int SERVER_ASSOCIATION_TIMEOUT = 40000;
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static const unsigned int PORT_HOP_INTERVAL = 10000;
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static const unsigned int MAX_PORTS_OPEN = 10;
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static const unsigned int MAX_OLD_SOCKET_AGE = 60000;
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static const int CONGESTION_TIMESTAMP_PENALTY = 500; /* ms */
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bool try_bind( const char *addr, int port_low, int port_high );
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class Socket
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{
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private:
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int _fd;
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public:
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int fd( void ) const { return _fd; }
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Socket( int family );
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~Socket();
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Socket( const Socket & other );
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Socket & operator=( const Socket & other );
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};
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std::deque< Socket > socks;
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bool has_remote_addr;
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Addr remote_addr;
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socklen_t remote_addr_len;
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bool server;
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int MTU;
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Base64Key key;
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Session session;
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void setup( void );
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Direction direction;
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uint64_t next_seq;
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uint16_t saved_timestamp;
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uint64_t saved_timestamp_received_at;
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uint64_t expected_receiver_seq;
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uint64_t last_heard;
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uint64_t last_port_choice;
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uint64_t last_roundtrip_success; /* transport layer needs to tell us this */
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bool RTT_hit;
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double SRTT;
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double RTTVAR;
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/* Exception from send(), to be delivered if the frontend asks for it,
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without altering control flow. */
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bool have_send_exception;
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NetworkException send_exception;
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Packet new_packet( string &s_payload );
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void hop_port( void );
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int sock( void ) const { assert( !socks.empty() ); return socks.back().fd(); }
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void prune_sockets( void );
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string recv_one( int sock_to_recv, bool nonblocking );
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public:
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Connection( const char *desired_ip, const char *desired_port ); /* server */
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Connection( const char *key_str, const char *ip, const char *port ); /* client */
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void send( string s );
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string recv( void );
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const std::vector< int > fds( void ) const;
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int get_MTU( void ) const { return MTU; }
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std::string port( void ) const;
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string get_key( void ) const { return key.printable_key(); }
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bool get_has_remote_addr( void ) const { return has_remote_addr; }
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uint64_t timeout( void ) const;
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double get_SRTT( void ) const { return SRTT; }
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const Addr &get_remote_addr( void ) const { return remote_addr; }
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socklen_t get_remote_addr_len( void ) const { return remote_addr_len; }
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const NetworkException *get_send_exception( void ) const
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{
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return have_send_exception ? &send_exception : NULL;
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}
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void set_last_roundtrip_success( uint64_t s_success ) { last_roundtrip_success = s_success; }
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static bool parse_portrange( const char * desired_port_range, int & desired_port_low, int & desired_port_high );
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};
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}
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#endif
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