{"id":8979,"date":"2025-04-18T17:03:09","date_gmt":"2025-04-18T09:03:09","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/8979.html"},"modified":"2025-04-18T17:03:09","modified_gmt":"2025-04-18T09:03:09","slug":"%e3%80%90linux%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e3%80%91%e7%ac%ac%e4%b8%83%e5%bc%b9-%e6%9e%84%e5%bb%ba%e7%b1%bb%e4%bc%bcxshell%e5%8a%9f%e8%83%bd%e7%9a%84tcp%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%9a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/8979.html","title":{"rendered":"\u3010Linux\u7f51\u7edc\u7f16\u7a0b\u3011\u7b2c\u4e03\u5f39---\u6784\u5efa\u7c7b\u4f3cXShell\u529f\u80fd\u7684TCP\u670d\u52a1\u5668\uff1a\u4eceTcpServer\u7c7b\u5230\u4e3b\u7a0b\u5e8f\u7684\u5b8c\u6574\u5b9e\u73b0"},"content":{"rendered":"

\u2728\u4e2a\u4eba\u4e3b\u9875：<\/span>\u00a0\u71ac\u591c\u5b66\u7f16\u7a0b\u7684\u5c0f\u6797<\/p>\n

💗\u7cfb\u5217\u4e13\u680f：\u00a0<\/span>\u3010C\u8bed\u8a00\u8be6\u89e3\u3011\u00a0\u3010\u6570\u636e\u7ed3\u6784\u8be6\u89e3\u3011\u3010C++\u8be6\u89e3\u3011\u3010Linux\u7cfb\u7edf\u7f16\u7a0b\u3011\u3010Linux\u7f51\u7edc\u7f16\u7a0b\u3011<\/p>\n

\u76ee\u5f55<\/p>\n

1\u3001TcpServer.hpp<\/p>\n

1.1\u3001TcpServer\u7c7b\u57fa\u672c\u7ed3\u6784<\/p>\n

1.2\u3001\u00a0Execute()<\/p>\n

2\u3001Command.hpp<\/p>\n

2.1\u3001Command\u7c7b\u57fa\u672c\u7ed3\u6784<\/p>\n

2.2\u3001\u6784\u9020\u6790\u6784\u51fd\u6570<\/p>\n

2.3\u3001SafeCheck()<\/p>\n

2.4\u3001HandlerCommand()\u00a0<\/p>\n

3\u3001TcpServerMain.cc<\/p>\n

4\u3001\u5b8c\u6574\u4ee3\u7801\u00a0<\/p>\n

4.1\u3001TcpServer.hpp<\/p>\n

4.2\u3001Command.hpp<\/p>\n

4.3\u3001TcpServerMain.cc<\/p>\n

\n

\u4e0a\u4e00\u5f39\u4f7f\u7528TCP\u534f\u8bae\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u7684\u901a\u4fe1，\u6b64\u5f39\u5b9e\u73b0\u4e00\u4e2a\u7c7b\u4f3c\u4e8eXShell\u7684\u529f\u80fd，\u5ba2\u6237\u7aef\u53d1\u51fa\u547d\u4ee4，\u670d\u52a1\u7aef\u6267\u884c\u547d\u4ee4，\u5e76\u5c06\u6267\u884c\u7ed3\u679c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef！<\/span>\u57fa\u672c\u7ed3\u6784\u8fd8\u662f\u4e0a\u4e00\u5f39\u7684\u7ed3\u6784，\u6b64\u5904\u4f7f\u7528\u591a\u7ebf\u7a0b\u7248\u672c\u5373\u53ef，\u65e0\u9700\u7ebf\u7a0b\u6c60\u7684\u4ee3\u7801！<\/p>\n

\u56e0\u4e3a\u5ba2\u6237\u7aef\u7684\u65b9\u6cd5\u9700\u8981\u5728TcpServer.hpp.hpp\u4e2d\u58f0\u660e，\u56e0\u6b64\u5148\u8bb2\u89e3TcpServer.hpp！<\/span><\/p>\n

1\u3001TcpServer.hpp<\/h2>\n

TcpServer.hpp\u5c01\u88c5TcpServer\u7c7b！<\/p>\n

TcpServer\u7c7b\u76f8\u8f83\u4e8e\u4e0a\u4e00\u5f39\u53ea\u9700\u8981\u7a0d\u5fae\u4fee\u6539\u5373\u53ef，\u9996\u5148\u56e0\u4e3a\u9700\u8981\u6267\u884cXShell\u7684\u529f\u80fd，\u5fc5\u4e0d\u53ef\u5c11\u7684\u5c31\u662f\u51fd\u6570\u65b9\u6cd5<\/span>！<\/p>\n

\u51fd\u6570\u65b9\u6cd5\u58f0\u660e：<\/p>\n

\/\/ sockfd \u7528\u4e8e\u63a5\u6536\u6d88\u606f\u548c\u53d1\u9001\u6d88\u606f，addr \u7528\u4e8e\u67e5\u770b\u662f\u8c01\u53d1\u9001\u7684
\nusing command_service_t = std::function<void(int sockfd,InetAddr addr)>; <\/p>\n

1.1\u3001TcpServer\u7c7b\u57fa\u672c\u7ed3\u6784<\/h3>\n

TcpServer\u7c7b\u57fa\u672c\u7ed3\u6784\u53ea\u9700\u52a0\u4e00\u4e2a\u65b9\u6cd5\u6210\u5458\u53d8\u91cf，\u6784\u9020\u51fd\u6570\u52a0\u8be5\u65b9\u6cd5\u521d\u59cb\u5316\u5373\u53ef<\/span>！<\/p>\n

using command_service_t = std::function<void(int sockfd,InetAddr addr)>;<\/p>\n

\/\/ \u9762\u5411\u5b57\u8282\u6d41
\nclass TcpServer
\n{
\npublic:
\n TcpServer(command_service_t service,uint16_t port = gport)
\n :_service(service), _port(port),_listensockfd(gsockfd),_isrunning(false)
\n {}
\n void InitServer();
\n void Loop();
\n ~TcpServer();
\nprivate:
\n uint16_t _port;
\n int _listensockfd;
\n bool _isrunning;<\/p>\n

command_service_t _service;
\n}; <\/p>\n

1.2\u3001\u00a0Execute()<\/h3>\n

Execute()\u6267\u884c\u56de\u8c03\u51fd\u6570!<\/p>\n

static void *Execute(void *args)
\n{
\n ThreadData *td = static_cast<ThreadData *>(args);
\n pthread_detach(pthread_self()); \/\/ \u5206\u79bb\u65b0\u7ebf\u7a0b，\u65e0\u9700\u4e3b\u7ebf\u7a0b\u56de\u6536
\n td->_self->_service(td->_sockfd,td->_addr); \/\/ \u6267\u884c\u56de\u8c03
\n ::close(td->_sockfd);
\n delete td;
\n return nullptr;
\n} <\/p>\n

2\u3001Command.hpp<\/h2>\n

Command\u7c7b\u5b9e\u73b0\u7c7b\u4f3c\u4e8eXShell\u7684\u529f\u80fd，<\/span>\u4f46\u662f\u9700\u8981\u6ce8\u610f\u4e0d\u8981\u8ba9\u6240\u6709\u547d\u4ee4\u90fd\u53ef\u4ee5\u6267\u884c，\u56e0\u4e3a\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5220\u5e93\u7b49\u76f8\u5173\u7684\u95ee\u9898，<\/span>\u56e0\u6b64\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u4f7f\u7528set\u5bb9\u5668\u5b58\u50a8\u5141\u8bb8\u6267\u884c\u547d\u4ee4\u7684\u524d\u7f00<\/span>！<\/p>\n

2.1\u3001Command\u7c7b\u57fa\u672c\u7ed3\u6784<\/h3>\n

\u6210\u5458\u53d8\u91cf\u4f7f\u7528set\u5bb9\u5668\u5b58\u50a8\u5141\u8bb8\u6267\u884c\u547d\u4ee4\u7684\u524d\u7f00，\u5185\u90e8\u5b9e\u73b0\u5b89\u5168\u68c0\u67e5，\u6267\u884c\u547d\u4ee4\u51fd\u6570\u548c\u547d\u4ee4\u5904\u7406\u51fd\u6570<\/span>！<\/p>\n

class Command
\n{
\npublic:
\n Command();
\n bool SafeCheck(const std::string &cmdstr);
\n \/\/ \u5b89\u5168\u6267\u884c
\n std::string Excute(const std::string &cmdstr);
\n void HandlerCommand(int sockfd, InetAddr addr);
\n ~Command();
\nprivate:
\n std::set<std::string> _safe_command; \/\/ \u53ea\u5141\u8bb8\u6267\u884c\u7684\u547d\u4ee4
\n}; <\/p>\n

2.2\u3001\u6784\u9020\u6790\u6784\u51fd\u6570<\/h3>\n

\u6784\u9020\u51fd\u6570\u5c06\u5141\u8bb8\u4f7f\u7528\u7684\u547d\u4ee4\u63d2\u5165\u5230\u5bb9\u5668，\u6790\u6784\u51fd\u6570\u65e0\u9700\u5904\u7406！<\/p>\n

\u6ce8\u610f：\u6b64\u5904\u53ef\u4ee5\u6839\u636e\u4e2a\u4eba\u9700\u8981\u52a0\u5165\u547d\u4ee4\u524d\u7f00！\u00a0<\/span><\/p>\n

Command()
\n{
\n \/\/ \u767d\u540d\u5355
\n _safe_command.insert("ls");
\n _safe_command.insert("touch"); \/\/ touch filename
\n _safe_command.insert("pwd");
\n _safe_command.insert("whoami");
\n _safe_command.insert("which"); \/\/ which pwd
\n}<\/p>\n

~Command()
\n{} <\/p>\n

2.3\u3001SafeCheck()<\/h3>\n

\u5b89\u5168\u68c0\u67e5\u51fd\u6570<\/span>\u68c0\u67e5\u5b57\u7b26\u4e32\u7684\u524d\u7f00，\u5982\u679c\u4e0eset\u5bb9\u5668\u4e2d\u7684\u5176\u4e2d\u4e00\u4e2a\u5185\u5bb9\u76f8\u540c\u5219\u8fd4\u56detrue，\u4e0d\u76f8\u540c\u5219\u8fd4\u56defalse<\/span>！<\/p>\n

\u6b64\u5904\u7528\u5230C\u8bed\u8a00\u7684\u5b57\u7b26\u4e32\u6bd4\u8f83\u51fd\u6570，\u6bd4\u8f83\u524dn\u4e2a\u5b57\u8282，\u76f8\u7b49\u5219\u8fd4\u56de0！<\/span><\/p>\n

strncmp()<\/span><\/p>\n

#include <string.h><\/p>\n

int strncmp(const char *s1, const char *s2, size_t n); <\/p>\n

SafeCheck()\u00a0<\/span><\/p>\n

bool SafeCheck(const std::string &cmdstr)
\n{
\n for(auto &cmd : _safe_command)
\n {
\n \/\/ \u53ea\u6bd4\u8f83\u547d\u4ee4\u5f00\u5934
\n if(strncmp(cmd.c_str(),cmdstr.c_str(),cmd.size()) == 0)
\n {
\n return true;
\n }
\n }
\n return false;
\n} <\/p>\n

2.4\u3001Excute()<\/span><\/p>\n

\u6267\u884c\u547d\u4ee4\u51fd\u6570\u9700\u8981\u5904\u7406\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u547d\u4ee4，\u6b64\u5904\u53ef\u4ee5\u4f7f\u7528popen()\u51fd\u6570\u76f4\u63a5\u6267\u884cC\u8bed\u8a00\u5b57\u7b26\u4e32\u7684\u547d\u4ee4<\/span>，\u5982\u679c\u6267\u884c\u6210\u529f(\u8fd4\u56de\u503c\u4e0d\u4e3a\u7a7a)\u4ee5\u884c\u8bfb\u53d6\u7684\u65b9\u5f0f\u5c06\u7ed3\u679c\u62fc\u63a5\u5230result\u5b57\u7b26\u4e32\u4e2d<\/span>，\u4f46\u662f\u6709\u4e9b\u547d\u4ee4\u6ca1\u6709\u6267\u884c\u7ed3\u679c，\u6b64\u65f6\u6253\u5370success，<\/span>\u6267\u884c\u5931\u8d25(\u8fd4\u56de\u503c\u4e3a\u7a7a)\u5219\u8fd4\u56deExecute error\u3002<\/span><\/p>\n

\u6ce8\u610f：\u524d\u63d0\u9700\u8981\u5224\u65ad\u547d\u4ee4\u662f\u5426\u5b89\u5168，\u4e0d\u5b89\u5168\u76f4\u63a5\u8fd4\u56deunsafe！<\/span><\/p>\n

popen()<\/span><\/p>\n

\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053，\u5e76\u5c06\u8be5\u7ba1\u9053\u4e0e\u4e00\u4e2a\u547d\u4ee4（\u901a\u8fc7shell\u6267\u884c）\u7684\u8f93\u5165\u6216\u8f93\u51fa\u8fde\u63a5\u8d77\u6765\u3002<\/p>\n

#include <stdio.h><\/p>\n

FILE *popen(const char *command, const char *type);<\/p>\n

int pclose(FILE *stream); <\/p>\n

\u53c2\u6570<\/p>\n