{"id":31670,"date":"2025-04-22T03:21:07","date_gmt":"2025-04-21T19:21:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/31670.html"},"modified":"2025-04-22T03:21:07","modified_gmt":"2025-04-21T19:21:07","slug":"issue-7-tcp%e5%9b%9e%e5%a3%b0%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%92%8c%e5%ae%a2%e6%88%b7%e7%ab%af","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/31670.html","title":{"rendered":"# issue 7 TCP\u56de\u58f0\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef"},"content":{"rendered":"

\u4e00\u3001TCP\/IP\u534f\u8bae\u6808<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e3a\u4ec0\u4e48\u9700\u8981\u7406\u89e3\u534f\u8bae\u6808？<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b66\u4e60C\/C++\u5c31\u662f\u8981\u61c2\u5e95\u5c42\u7684\u539f\u7406\u3002\u4e0d\u7136\u6c38\u8fdc\u662f\u201c\u8c03\u5305\u4fa0\u201d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6839\u636e\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\u7684\u4e0d\u540c，\u57fa\u4e8e\u7f51\u7edc\u534f\u8bae（\u8fd9\u91cc\u662f\u6307\u57fa\u4e8eTCP\/IP\u534f\u8bae）\u7684\u5957\u63a5\u5b57\u4e00\u822c\u5206\u4e3aTCP \u5957\u63a5\u5b57\u548cUDP \u5957\u63a5\u5b57\u3002\u56e0\u4e3aTCP \u5957\u63a5\u5b57\u662f\u9762\u5411\u8fde\u63a5<\/span>\u7684，\u56e0\u6b64\u53c8\u79f0\u57fa\u4e8e\u6d41（stream）\u7684\u5957\u63a5\u5b57<\/span>\u3002 TCP \u662fTransmissionControl Protocol（\u4f20\u8f93\u63a7\u5236\u534f\u8bae<\/span>）\u7684\u7b80\u5199，\u610f\u4e3a"\u5bf9\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u7684\u63a7\u5236"\u3002<\/p>\n

\"\"<\/p>\n

\u7b2c\u4e00\u5c42\u6b21：\u6570\u636e\u94fe\u8def\u5c42\u00a0<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u56fe\u6240\u793a：\u94fe\u8def\u5c42\u662f\u7269\u7406\u94fe\u63a5\u9886\u57df\u6807\u51c6\u5316\u7684\u7ed3\u679c，\u4e5f\u662f\u6700\u57fa\u672c\u7684\u9886\u57df，\u4e13\u95e8\u5b9a\u4e49LAN\u3001WAN\u3001MAN<\/span> \u7b49\u7f51\u7edc\u6807\u51c6\u3002\u82e5\u4e24\u53f0\u4e3b\u673a\u901a\u8fc7\u7f51\u7edc\u8fdb\u884c\u6570\u636e\u4ea4\u6362，\u5219\u9700\u8981\u4e0b\u56fe\u6240\u793a\u7684\u7269\u7406\u8fde\u63a5， \u94fe\u8def\u5c42\u5c31\u8d1f\u8d23\u8fd9\u4e9b\u6807\u51c6\u3002<\/p>\n

\"\"<\/p>\n

\u7b2c\u4e8c\u5c42\u6b21：IP \u5c42<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u51c6\u5907\u597d\u7269\u7406\u8fde\u63a5\u540e\u5c31\u8981\u4f20\u8f93\u6570\u636e\u3002\u4e3a\u4e86\u5728\u590d\u6742\u7684\u7f51\u7edc\u4e2d\u4f20\u8f93\u6570\u636e，\u9996\u5148\u9700\u8981\u8003\u8651\u8def\u5f84\u7684 \u9009\u62e9\u3002\u5411\u76ee\u6807\u4f20\u8f93\u6570\u636e\u9700\u8981\u7ecf\u8fc7\u54ea\u6761\u8def\u5f84<\/span>?\u89e3\u51b3\u6b64\u95ee\u9898\u5c31\u662fIP \u5c42<\/span>，\u8be5\u5c42\u4f7f\u7528\u7684\u534f\u8bae\u5c31\u662fIP\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IP \u662f\u9762\u5411\u6d88\u606f\u7684\u3001\u4e0d\u53ef\u9760\u7684<\/span>\u534f\u8bae\u3002\u6bcf\u6b21\u4f20\u8f93\u6570\u636e\u65f6\u4f1a\u5e2e\u6211\u4eec\u9009\u62e9\u8def\u5f84，\u4f46\u5e76\u4e0d\u4e00\u81f4\u3002\u5982 \u679c\u4f20\u8f93\u4e2d\u53d1\u751f\u8def\u5f84\u9519\u8bef，\u5219\u9009\u62e9\u5176\u4ed6\u8def\u5f84;\u4f46\u5982\u679c\u53d1\u751f\u6570\u636e\u4e22\u5931\u6216\u9519\u8bef，\u5219\u65e0\u6cd5\u89e3\u51b3\u3002\u6362\u8a00 \u4e4b，IP \u534f\u8bae\u662f\u65e0\u6cd5\u5e94\u5bf9\u6570\u636e\u9519\u8bef\u7684\u3002\u56e0\u6b64，\u53c8\u8981\u4e0b\u653e\u4e00\u5c42\u3002<\/p>\n

\u7b2c\u4e09\u5c42\u6b21：TCP\/UDP \u5c42<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IP \u5c42\u89e3\u51b3\u6570\u636e\u4f20\u8f93\u4e2d\u7684\u8def\u5f84\u9009\u62e9\u95ee\u9898<\/span>，\u53ea\u9700\u7167\u6b64\u8def\u5f84\u4f20\u8f93\u6570\u636e\u5373\u53ef\u3002TCP \u548cUDP \u5c42\u4ee5 IP \u5c42\u63d0\u4f9b\u7684\u8def\u5f84\u4fe1\u606f\u4e3a\u57fa\u7840\u5b8c\u6210\u5b9e\u9645\u7684\u6570\u636e\u4f20\u8f93<\/span>，\u6545\u8be5\u5c42\u53c8\u79f0\u4f20\u8f93\u5c42（Transport）<\/span>\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IP \u5c42\u53ea\u5173\u6ce81 \u4e2a\u6570\u636e\u5305（\u6570\u636e\u4f20\u8f93\u7684\u57fa\u672c\u5355\u4f4d）\u7684\u4f20\u8f93\u8fc7\u7a0b<\/span>\u3002\u56e0\u6b64，\u5373\u4f7f\u4f20\u8f93\u591a\u4e2a\u6570\u636e \u5305，\u6bcf\u4e2a\u6570\u636e\u5305\u4e5f\u662f\u7531IP \u5c42\u5b9e\u9645\u4f20\u8f93\u7684，\u4e5f\u5c31\u662f\u8bf4\u4f20\u8f93\u987a\u5e8f\u53ca\u4f20\u8f93\u672c\u8eab\u662f\u4e0d\u53ef\u9760\u7684<\/span>\u3002\u82e5\u53ea \u5229\u7528IP \u5c42\u4f20\u8f93\u6570\u636e，\u5219\u6709\u53ef\u80fd\u5bfc\u81f4\u540e\u4f20\u8f93\u7684\u6570\u636e\u5305B \u6bd4\u5148\u4f20\u8f93\u7684\u6570\u636e\u5305A \u63d0\u65e9\u5230\u8fbe\u3002\u53e6\u5916， \u4f20\u8f93\u7684\u6570\u636e\u5305A\u3001B\u3001C \u4e2d\u6709\u53ef\u80fd\u53ea\u6536\u5230A \u548cC，\u751a\u81f3\u6536\u5230\u7684C \u53ef\u80fd\u5df2\u635f\u6bc1\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u82e5\u6dfb\u52a0TCP \u534f\u8bae\u5219\u6309\u7167\u4e0b\u56fe\u7684\u5bf9\u8bdd\u65b9\u5f0f\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u3002<\/p>\n

\"\"<\/p>\n

\u7b2c\u56db\u5c42\u6b21：\u5e94\u7528\u5c42<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u524d\u9762\u4e09\u4e2a\u5c42\u6b21，\u5957\u63a5\u5b57\u901a\u4fe1\u8fc7\u7a0b\u4e2d\u90fd\u662f\u81ea\u52a8\u5904\u7406<\/span>\u7684\u3002\u4e3a\u4e86"\u4f7f\u7a0b\u5e8f\u5458\u4ece\u8fd9\u4e9b\u7ec6\u8282\u4e2d\u89e3\u653e \u51fa\u6765"\u3002\u9009\u62e9\u6570\u636e\u4f20\u8f93\u8def\u5f84\u3001\u6570\u636e\u786e\u8ba4\u8fc7\u7a0b\u90fd\u88ab\u9690\u85cf\u5230\u5957\u63a5\u5b57\u5185\u90e8\u3002\u524d\u9762\u4e09\u4e2a\u5c42\u6b21\u90fd\u662f\u4e3a\u4e86 \u7ed9\u5e94\u7528\u5c42\u63d0\u4f9b\u670d\u52a1\u7684\u3002<\/p>\n

\u4e8c\u3001TCP\u670d\u52a1\u7aef\u548c\u4ee3\u7801\u5b9e\u73b0<\/h2>\n

\u670d\u52a1\u7684\u521b\u5efa\u7684\u57fa\u672c\u6d41\u7a0b（\u6700\u7b80\u5355\u7684）<\/p>\n

\"\"<\/p>\n

void run_client()
\n{
\nint client = socket(PF_INET, SOCK_STREAM, 0);
\nstruct sockaddr_in servaddr;
\nmemset(&servaddr, 0, sizeof(servaddr)); \/\/\u6e05\u96f6 \u9632\u6b62\u610f\u5916
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = inet_addr("127.0.0.1");<\/p>\n

servaddr.sin_port = htons(33005);
\nint ret = connect(client, (struct sockaddr*)&servaddr, sizeof(servaddr));
\nif (ret == 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nchar buffer[1024] = "hello , here is client\\\\n";
\nwrite(client, buffer, strlen(buffer));
\nmemset(buffer, 0, sizeof(buffer));
\nread(client, buffer, sizeof(buffer));
\nstd::cout << buffer;
\n}
\nelse {
\nprintf("%s(%d):%s %d\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__, ret);
\n}
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\n}
\nvoid lession63_() {
\nint server, client;
\nstruct sockaddr_in seraddr, cliaddr; \/\/\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53
\nsocklen_t cliaddrlen;\/\/\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53\u5927\u5c0f
\n\/\/const char* message = "hello world!\\\\n";<\/p>\n

\/\/1.\u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nserver = socket(PF_INET, SOCK_STREAM, 0);\/\/TCP\u534f\u8bae \u4ec0\u4e48\u662fTCP，\u5c31\u662fIPv4\u4e2d\u9762\u5411\u4e86\u6d41\u7684\u5957\u63a5\u5b57
\nif (server < 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "create socket failed!" << std::endl;
\nreturn;
\n}<\/p>\n

\/\/2.\u7ed1\u5b9a\u670d\u52a1\u5668\u5957\u63a5\u5b57\u548c\u5730\u5740\u7ed3\u6784\u4f53<\/p>\n

\/\/ \u8bbe\u7f6eSO_REUSEADDR\u9009\u9879，\u5141\u8bb8\u7aef\u53e3\u590d\u7528<\/p>\n

memset(&seraddr, 0, sizeof(seraddr));\/\/\u6e05\u96f6
\nseraddr.sin_family = AF_INET; \/\/\u5730\u5740\u534f\u8bae\u65cf
\nseraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
\nseraddr.sin_port = htons(33005);<\/p>\n

printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nint on = 1;
\nif (setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
\nperror("setsockopt");
\nclose(server);
\nreturn;
\n}
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

int ret = bind(server, (struct sockaddr*)&seraddr, sizeof(seraddr));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "bind failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nret = listen(server, 3);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "listen failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nchar buffer[1024];
\nwhile (1) {
\nmemset(buffer, 0, sizeof(buffer));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\ncliaddrlen = sizeof(cliaddr);
\nclient = accept(server, (struct sockaddr*)&cliaddr, &cliaddrlen\/*&cliaddrlen*\/);
\nif (client == -1) {
\nstd::cout << "accept failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\n\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nread(client, buffer, sizeof(buffer));
\nssize_t len = write(client, buffer, strlen(buffer)); \/\/\u8fd4\u56de\u503c\u5c31\u662f\u5b9e\u9645\u5199\u5165\u7684\u5b57\u8282\u6570
\nif (len != (ssize_t)strlen(buffer)) {
\nstd::cout << "write failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nclose(client);
\n}
\nclose(server);
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

}
\nvoid lession63()
\n{
\npid_t pid = fork();
\nif (pid == 0) {
\n\/\/\u5f00\u542f\u5ba2\u6237\u7aef
\nsleep(2);\/\/\u8ba9\u670d\u52a1\u7aef\u5148\u542f\u52a8
\nrun_client();
\nrun_client();
\n}
\nelse if (pid > 0) {
\n\/\/\u5f00\u542f\u670d\u52a1\u7aef
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nlession63_();
\nint status = 0;
\nwait(&status);\/\/\u907f\u514d\u5b50\u8fdb\u7a0b\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b
\n}
\nelse {
\nstd::cout << "fork failed!" << pid << std::endl;
\n}
\n}<\/p>\n

\u4e09\u3001connect\u51fd\u6570\u548cTCP\u5ba2\u6237\u7aef<\/h2>\n

connect\u51fd\u6570：<\/h3>\n

#include<sys\/socket.h> int connect(int sock<\/span>,struct sockaddr*servaddr<\/span>, socklen_t addrlen<\/span>); \u2192\u6210\u529f\u65f6\u8fd4\u56de0，\u5931\u8d25\u65f6\u8fd4\u56de-1\u3002 \u25cf sock <\/span>\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002 \u25cf servaddr <\/span>\u4fdd\u5b58\u76ee\u6807\u670d\u52a1\u5668\u7aef\u5730\u5740\u4fe1\u606f\u7684\u53d8\u91cf\u5730\u5740\u503c\u3002 \u25cfaddrlen <\/span>\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u4f20\u9012\u5df2\u4f20\u9012\u7ed9\u7b2c\u4e8c\u4e2a\u7ed3\u6784\u4f53\u53c2\u6570servaddr \u7684\u5730\u5740\u53d8\u91cf\u957f\u5ea6\u3002<\/p>\n

\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u5730\u5740\u4fe1\u606f\u5728\u54ea？ \u5b9e\u73b0\u670d\u52a1\u5668\u7aef\u5fc5\u7ecf\u8fc7\u7a0b\u4e4b\u4e00\u5c31\u662f\u7ed9\u5957\u63a5\u5b57\u5206\u914dIP \u548c\u7aef\u53e3\u53f7\u3002\u4f46\u5ba2\u6237\u7aef\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u5e76\u672a\u51fa\u73b0 \u5957\u63a5\u5b57\u5730\u5740\u5206\u914d<\/span>，\u800c\u662f\u521b\u5efa\u5957\u63a5\u5b57\u540e\u7acb\u5373\u8c03\u7528conect \u51fd\u6570\u3002\u96be\u9053\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u65e0\u9700\u5206\u914dIP \u548c\u7aef\u53e3? \u7b54\u6848：\u5f53\u7136\u4e0d\u662f! \u7f51\u7edc\u6570\u636e\u4ea4\u6362\u5fc5\u987b\u5206\u914dIP \u548c\u7aef\u53e3\u3002\u65e2\u7136\u5982\u6b64，\u90a3\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u4f55\u65f6\u3001\u4f55\u5730\u3001\u5982\u4f55\u5206\u914d \u5730\u5740\u5462? .\u4f55\u65f6? \u8c03\u7528connect \u51fd\u6570\u65f6\u3002 .\u4f55\u5730? \u64cd\u4f5c\u7cfb\u7edf，\u66f4\u51c6\u786e\u5730\u8bf4\u662f\u5728\u5185\u6838\u4e2d\u3002 .\u5982\u4f55? IP \u7528\u8ba1\u7b97\u673a（\u4e3b\u673a）\u7684IP，\u7aef\u53e3\u968f\u673a\u3002 \u5ba2\u6237\u7aef\u7684IP \u5730\u5740\u548c\u7aef\u53e3\u5728\u8c03\u7528connect \u51fd\u6570\u65f6\u81ea\u52a8\u5206\u914d，\u65e0\u9700\u8c03\u7528\u6807\u8bb0\u7684bind \u51fd\u6570\u8fdb \u884c\u5206\u914d\u3002 \u8fd9\u5c31\u662f\u4e0e\u670d\u52a1\u7aef\u7684\u4e0d\u540c\u3002<\/p>\n

TCP\u5ba2\u6237\u7aef<\/h3>\n

\"\"<\/p>\n<\/p>\n

\u56db\u3001\u5ba2\u6237\u7aef\u4ee3\u7801\u5b9e\u73b0\u548c\u8054\u8c03<\/h2>\n

\u57fa\u4e8eTCP\u670d\u52a1\u7aef\/\u5ba2\u6237\u7aef\u7684\u51fd\u6570\u8c03\u7528\u5173\u7cfb<\/p>\n

\"\"<\/p>\n

\u4e94\u3001\u8fed\u4ee3\u670d\u52a1\u5668<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u524d\u9762\u7684\u666e\u901a\u670d\u52a1\u5668TCP \u7684\u7f3a\u70b9：\u4e00\u6b21\u670d\u52a1\u3002\u53ea\u80fd\u7ed9\u4e00\u4e2a\u5ba2\u6237\u7aef\u670d\u52a1\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fed\u4ee3\u670d\u52a1\u5668\u6bd4\u8f83\u539f\u59cb，\u5b83\u7684\u539f\u578b\u53ef\u4ee5\u63cf\u8ff0\u6210：<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u4e2a\u6539\u52a8\u5c31\u662f，\u5f53\u5904\u7406\u5b8c\u4e00\u4e2a\u5ba2\u6237\u7aef\u540e，\u4f1a\u518d\u6b21\u8fdb\u5165accept，\u7b49\u5f85\u8fde\u63a5\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e5f\u5c31\u662f\u8bf4，\u8fd9\u4e2a\u7a0b\u5e8f\u662f\u4e00\u4e2a\u4e00\u4e2a\u5904\u7406\u5404\u4e2a\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u8fde\u63a5\u7684，\u6bd4\u5982\u4e00\u4e2a\u5ba2\u6237\u7aef\u53d1\u6765\u4e00\u4e2a \u8fde\u63a5，\u90a3\u4e48\u53ea\u8981\u5b83\u8fd8\u6ca1\u6709\u5b8c\u6210\u81ea\u5df1\u7684\u4efb\u52a1，\u90a3\u4e48\u5b83\u5c31\u4e00\u76f4\u4f1a\u5360\u7528\u670d\u52a1\u5668\u7684\u8fdb\u7a0b\u76f4\u5230\u5904\u7406\u5b8c\u6bd5 \u540e\u670d\u52a1\u5668\u5173\u95ed\u6389\u8fd9\u4e2asocket\u3002\u53ef\u4ee5\u5faa\u73af\u670d\u52a1\u591a\u4e2a\u5ba2\u6237\u7aef<\/span>\u3002<\/p>\n

\u516d\u3001\u56de\u58f0\u670d\u52a1\u5668\u5b9e\u73b0<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u56de\u58f0\u670d\u52a1\u5668：\u5c06\u4ece\u5ba2\u6237\u7aef\u6536\u5230\u7684\u6570\u636e\u539f\u6837\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef，\u5373\u201c\u56de\u58f0\u201d\u3002<\/p>\n

void run_client65()
\n{
\nint client = socket(PF_INET, SOCK_STREAM, 0);
\nstruct sockaddr_in servaddr;
\nmemset(&servaddr, 0, sizeof(servaddr)); \/\/\u6e05\u96f6 \u9632\u6b62\u610f\u5916
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = inet_addr("127.0.0.1");<\/p>\n

servaddr.sin_port = htons(33005);
\nint ret = connect(client, (struct sockaddr*)&servaddr, sizeof(servaddr));
\nwhile (ret == 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nchar buffer[256] = "";<\/p>\n

fputs("input message(Q to quit):", stdout);\/\/\u8f93\u51fa\u63d0\u793a\u7b26
\nfgets(buffer, sizeof(buffer), stdin\/*\u6807\u51c6\u8f93\u5165\u6d41*\/);\/\/\u8bfb\u5165\u4e00\u884c
\nif ((strcmp(buffer, "Q\\\\n") == 0) || (strcmp(buffer, "q\\\\n") == 0)) {
\nbreak;
\n}<\/p>\n

size_t len = strlen(buffer);
\nsize_t send_len = 0;
\nwhile (send_len < len); {
\nssize_t ret = write(client, buffer + send_len, len – send_len);\/\/\u53d1\u7ed9\u670d\u52a1\u5668
\nif (ret <= 0)
\n{
\nfputs("write failed!\\\\n", stdout);
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\nreturn;
\n}
\nsend_len += (size_t)ret;
\n}
\nmemset(buffer, 0, sizeof(buffer));
\nsize_t read_len = 0;
\nwhile (read_len < len)
\n{
\nssize_t ret = read(client, buffer + read_len, len – read_len);
\nif (ret <= 0)
\n{
\nfputs("read failed!\\\\n", stdout);
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\nreturn;
\n}
\nsend_len += (size_t)ret;
\n}<\/p>\n

std::cout << "from server:" << buffer;
\n}
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\n}
\nvoid server65() {
\nint server, client;
\nstruct sockaddr_in seraddr, cliaddr; \/\/\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53
\nsocklen_t cliaddrlen;\/\/\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53\u5927\u5c0f<\/p>\n

\/\/1.\u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nserver = socket(PF_INET, SOCK_STREAM, 0);\/\/TCP\u534f\u8bae \u4ec0\u4e48\u662fTCP，\u5c31\u662fIPv4\u4e2d\u9762\u5411\u4e86\u6d41\u7684\u5957\u63a5\u5b57
\nif (server < 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "create socket failed!" << std::endl;
\nreturn;
\n}<\/p>\n

\/\/2.\u7ed1\u5b9a\u670d\u52a1\u5668\u5957\u63a5\u5b57\u548c\u5730\u5740\u7ed3\u6784\u4f53
\nmemset(&seraddr, 0, sizeof(seraddr));\/\/\u6e05\u96f6
\nseraddr.sin_family = AF_INET; \/\/\u5730\u5740\u534f\u8bae\u65cf
\nseraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
\nseraddr.sin_port = htons(33005);<\/p>\n

\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nint on = 1;
\nif (setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
\nperror("setsockopt");
\nclose(server);
\nreturn;
\n}
\n\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

int ret = bind(server, (struct sockaddr*)&seraddr, sizeof(seraddr));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "bind failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nret = listen(server, 3);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "listen failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nchar buffer[1024];
\nfor (int i = 0; i < 2; i++) {
\nmemset(buffer, 0, sizeof(buffer));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\ncliaddrlen = sizeof(cliaddr);
\nclient = accept(server, (struct sockaddr*)&cliaddr, &cliaddrlen\/*&cliaddrlen*\/);
\nif (client == -1) {
\nstd::cout << "accept failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\n\/\/ssize_t len=read(client, buffer, sizeof(buffer));
\nssize_t len = 0;
\nwhile ((len = read(client, buffer, sizeof(buffer))) > 0) {
\nlen = write(client, buffer, len); \/\/\u8fd4\u56de\u503c\u5c31\u662f\u5b9e\u9645\u5199\u5165\u7684\u5b57\u8282\u6570
\nif (len != (ssize_t)strlen(buffer)) {
\nstd::cout << "write failed! len:" << len << " buffer:" << buffer << std::endl;
\nclose(server);
\nreturn;
\n}
\nmemset(buffer, 0, len);
\n}<\/p>\n

printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nclose(client);
\n}
\nclose(server);
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\n}
\nvoid lession65()
\n{
\npid_t pid = fork();
\nif (pid == 0) { \/\/\u5b50\u8fdb\u7a0b
\n\/\/\u5f00\u542f\u670d\u52a1\u7aef
\nserver65();
\n}
\nelse if (pid > 0) {
\nfor (int i = 0; i < 2; i++)
\nrun_client65();
\nint status = 0;
\nwait(&status);\/\/\u907f\u514d\u5b50\u8fdb\u7a0b\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b
\n}
\nelse {
\nstd::cout << "fork failed!" << pid << std::endl;
\n}
\n}<\/p>\n

\u4e03\u3001\u56de\u58f0\u670d\u52a1\u5668\u5b58\u5728\u7684\u95ee\u9898\u548c\u89e3\u51b3<\/h2>\n

write(sock, message,strlen(message));
\nstr_len= read(sock, message,BUF_SIZE-1);
\nmessage[str_len]= 0;
\nprintf("Message from server:%s",message); <\/p>\n

\u4ee5\u4e0a\u4ee3\u7801\u6709\u4e2a\u9519\u8bef\u5047\u8bbe<\/span>\u2236 "\u6bcf\u6b21\u8c03\u7528read\u3001write \u51fd\u6570\u65f6\u90fd\u4f1a\u4ee5\u5b57\u7b26\u4e32\u4e3a\u5355\u4f4d\u6267\u884c\u5b9e\u9645\u7684I\/O \u64cd\u4f5c（\u8bfb\u6587\u4ef6\u662f\u8f93\u5165，\u5199\u6587\u4ef6\u662f\u8f93\u51fa）<\/span>\u3002" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f53\u7136，\u6bcf\u6b21\u8c03\u7528write \u51fd\u6570\u90fd\u4f1a\u4f20\u90121 \u4e2a\u5b57\u7b26\u4e32，\u56e0\u6b64\u8fd9\u79cd\u5047\u8bbe\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u4e5f\u7b97\u5408\u7406\u3002 \u4f46\u662f\u6211\u4eec\u4e4b\u524d\u8bb2\u8fc7："TCP \u4e0d\u5b58\u5728\u6570\u636e\u8fb9\u754c"\u7684\u5185\u5bb9\u5417? \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e0a\u8ff0\u5ba2\u6237\u7aef\u662f\u57fa\u4e8eTCP \u7684，\u56e0\u6b64，\u591a\u6b21\u8c03\u7528write \u51fd\u6570\u4f20\u9012\u7684\u5b57\u7b26\u4e32\u6709\u53ef\u80fd\u4e00\u6b21\u6027\u4f20\u9012 \u5230\u670d\u52a1\u5668\u7aef\u3002\u6b64\u65f6\u5ba2\u6237\u7aef\u6709\u53ef\u80fd\u4ece\u670d\u52a1\u5668\u7aef\u6536\u5230\u591a\u4e2a\u5b57\u7b26\u4e32，\u8fd9\u4e0d\u662f\u6211\u4eec\u5e0c\u671b\u770b\u5230\u7684\u7ed3\u679c\u3002 \u8fd8\u9700\u8003\u8651\u670d\u52a1\u5668\u7aef\u7684\u5982\u4e0b\u60c5\u51b5\u2236 "\u5b57\u7b26\u4e32\u592a\u957f，\u9700\u8981\u52062 \u4e2a\u6570\u636e\u5305\u53d1\u9001!<\/span>" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u7684\u56de\u58f0\u670d\u52a1\u5668\u7aef\/\u5ba2\u6237\u7aef\u7ed9\u51fa\u7684\u7ed3\u679c\u662f\u6b63\u786e\u7684\u3002\u4f46\u8fd9\u53ea\u662f\u8fd0\u6c14\u597d\u7f62\u4e86!\u53ea\u662f\u56e0\u4e3a\u6536\u53d1 \u7684\u6570\u636e\u5c0f，\u800c\u4e14\u8fd0\u884c\u73af\u5883\u4e3a\u540c\u4e00\u53f0\u8ba1\u7b97\u673a\u6216\u76f8\u90bb\u7684\u4e24\u53f0\u8ba1\u7b97\u673a，\u6240\u4ee5\u6ca1\u53d1\u751f\u9519\u8bef，\u53ef\u5b9e\u9645\u4e0a \u4ecd\u5b58\u5728\u53d1\u751f\u9519\u8bef\u7684\u53ef\u80fd\u3002<\/p>\n

\u516b\u3001\u56de\u58f0\u670d\u52a1\u5668\u5b9e\u6218：\u8ba1\u7b97\u5668\u7684\u7f51\u7edc\u5b9e\u73b0（\u4e0a）<\/h2>\n

\u8fd9\u91cc\u8fdb\u884c\u5ba2\u6237\u7aef\u7684\u5b9e\u73b0：<\/h3>\n

void run_client66()
\n{
\nint client = socket(PF_INET, SOCK_STREAM, 0);
\nstruct sockaddr_in servaddr;
\nmemset(&servaddr, 0, sizeof(servaddr)); \/\/\u6e05\u96f6 \u9632\u6b62\u610f\u5916
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = inet_addr("127.0.0.1");<\/p>\n

servaddr.sin_port = htons(33005);
\nint ret = connect(client, (struct sockaddr*)&servaddr, sizeof(servaddr));
\nchar buffer[255 * 4] = "";
\nwhile (ret == 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

fputs("Operand count:", stdout);\/\/\u8f93\u51fa\u63d0\u793a\u7b26
\nint opnd_cnt = 0;
\nscanf("%d", &opnd_cnt);
\nif (opnd_cnt <= 1 && opnd_cnt >= 256) {
\nfputs("opnd_cnt error,too small or too big!\\\\n", stdout);
\nclose(client);
\nstd::cout << "client done!" << opnd_cnt << std::endl;
\nreturn;
\n}
\nbuffer[0] = (char)opnd_cnt; \/\/\u670d\u52a1\u5668\u6b64\u5904\u9700\u8981\u89e3\u91ca\u4e3a\u65e0\u7b26\u53f7
\nfor (int i = 0; i < opnd_cnt; i++) {
\nscanf("%d", buffer + 1 + i * 4);
\n}
\nfgetc(stdin);
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nfputs("Operator:", stdout);
\nbuffer[1 + opnd_cnt * 4] = (char)fgetc(stdin);
\n\/\/buffer[1 + opnd_cnt * 4] = (char)fgetc(stdin);
\n\/\/fgetc(stdin); \/\/ \u6e05\u9664\u6362\u884c\u7b26<\/p>\n

printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

size_t len = opnd_cnt * 4 + 2;
\nsize_t send_len = 0;
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nwhile (send_len < len) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nssize_t ret = write(client, buffer + send_len, len – send_len);\/\/\u53d1\u7ed9\u670d\u52a1\u5668
\nif (ret <= 0)
\n{
\nfputs("write failed!\\\\n", stdout);
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\nreturn;
\n}
\nsend_len += (size_t)ret;
\n}
\nmemset(buffer, 0, sizeof(buffer));<\/p>\n

printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nsize_t read_len = 0;
\nwhile (read_len < 4)
\n{
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nssize_t ret = read(client, buffer + read_len, len – read_len);
\nif (ret <= 0)
\n{
\nfputs("read failed!\\\\n", stdout);
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\nreturn;
\n}
\nread_len += (size_t)ret;
\n}<\/p>\n

printf("from server:%d\\\\n", *(int*)buffer);
\n}
\nclose(client);
\nstd::cout << "client done!" << std::endl;
\n}<\/p>\n

\u4e5d\u3001\u56de\u58f0\u670d\u52a1\u5668\u5b9e\u6218：\u8ba1\u7b97\u5668\u7684\u7f51\u7edc\u5b9e\u73b0（\u4e0b）<\/h2>\n

\u8fd9\u91cc\u5b9e\u73b0\u670d\u52a1\u7aef：（\u5305\u542b\u8ba1\u7b97\u51fd\u6570\u548c\u4e3b\u51fd\u6570）<\/h3>\n

int calculate(int count, int oprand[], char op) {
\nint result = 0;
\nswitch (op) {
\ncase '+':
\nfor (int i = 0; i < count; i++) {
\nresult += oprand[i];
\n}
\nbreak;
\ncase '-':
\nresult = oprand[0];
\nfor (int i = 1; i < count; i++) {
\nresult -= oprand[i];
\n}
\nbreak;
\ncase '*':
\nresult = oprand[0];
\nfor (int i = 1; i < count; i++) {
\nresult *= oprand[i];
\n}
\nbreak;
\ndefault:
\nbreak;
\n}
\nreturn result;
\n}
\nvoid server66() {
\nint server, client;
\nstruct sockaddr_in seraddr, cliaddr; \/\/\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53
\nsocklen_t cliaddrlen;\/\/\u5ba2\u6237\u7aef\u7684\u5730\u5740\u7ed3\u6784\u4f53\u5927\u5c0f<\/p>\n

\/\/1.\u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nserver = socket(PF_INET, SOCK_STREAM, 0);\/\/TCP\u534f\u8bae \u4ec0\u4e48\u662fTCP，\u5c31\u662fIPv4\u4e2d\u9762\u5411\u4e86\u6d41\u7684\u5957\u63a5\u5b57
\nif (server < 0) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "create socket failed!" << std::endl;
\nreturn;
\n}<\/p>\n

\/\/2.\u7ed1\u5b9a\u670d\u52a1\u5668\u5957\u63a5\u5b57\u548c\u5730\u5740\u7ed3\u6784\u4f53
\nmemset(&seraddr, 0, sizeof(seraddr));\/\/\u6e05\u96f6
\nseraddr.sin_family = AF_INET; \/\/\u5730\u5740\u534f\u8bae\u65cf
\nseraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
\nseraddr.sin_port = htons(33005);<\/p>\n

\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nint on = 1;
\nif (setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
\nperror("setsockopt");
\nclose(server);
\nreturn;
\n}
\n\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);<\/p>\n

int ret = bind(server, (struct sockaddr*)&seraddr, sizeof(seraddr));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "bind failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nret = listen(server, 3);
\nif (ret == -1) {
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nstd::cout << "listen failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\nchar buffer[1024];
\nfor (int i = 0; i < 2; i++) {
\nmemset(buffer, 0, sizeof(buffer));
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\ncliaddrlen = sizeof(cliaddr);
\nclient = accept(server, (struct sockaddr*)&cliaddr, &cliaddrlen\/*&cliaddrlen*\/);
\nif (client == -1) {
\nstd::cout << "accept failed!" << std::endl;
\nclose(server);
\nreturn;
\n}
\n\/\/printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\n\/\/ssize_t len=read(client, buffer, sizeof(buffer));
\nssize_t len = 0;
\nlen = read(client, buffer, 1);
\nint result;
\nif (len > 0) {
\nfor (unsigned int i = 0; i < ((unsigned)buffer[0] & 0xFF); i++) {
\nread(client, buffer + 1 + i * 4, 4);
\n}
\nread(client, buffer + 1 + ((unsigned)buffer[0] & 0xFF) * 4, 1);
\nresult = calculate((int)buffer[0] & 0xFF, (int*)(buffer + 1), buffer[1 + ((unsigned)buffer[0] & 0xFF) * 4]);
\nwrite(client, &result, 4);
\nstd::cout << "result" << result << std::endl;
\n}
\nwhile ((len = read(client, buffer, sizeof(buffer))) > 0) {
\nlen = write(client, buffer, len); \/\/\u8fd4\u56de\u503c\u5c31\u662f\u5b9e\u9645\u5199\u5165\u7684\u5b57\u8282\u6570
\nif (len != (ssize_t)strlen(buffer)) {
\nstd::cout << "write failed! len:" << len << " buffer:" << buffer << std::endl;
\nclose(server);
\nreturn;
\n}
\nmemset(buffer, 0, len);
\n}<\/p>\n

printf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\nread(client, buffer, 1);
\nclose(client);
\n}
\nclose(server);
\nprintf("%s(%d):%s\\\\r\\\\n", __FILE__, __LINE__, __FUNCTION__);
\n}
\nvoid lession66()
\n{
\npid_t pid = fork();
\nif (pid == 0) { \/\/\u5b50\u8fdb\u7a0b
\n\/\/\u5f00\u542f\u670d\u52a1\u7aef
\nserver66();
\n}
\nelse if (pid > 0) {
\nfor (int i = 0; i < 2; i++)
\nrun_client66();
\nint status = 0;
\nwait(&status);\/\/\u907f\u514d\u5b50\u8fdb\u7a0b\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b
\n}
\nelse {
\nstd::cout << "fork failed!" << pid << std::endl;
\n}
\n}<\/p>\n

\u5341\u3001TCP\u5957\u63a5\u5b57\u7684IO\u7f13\u51b2<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u77e5\u9053，TCP \u5957\u63a5\u5b57\u7684\u6570\u636e\u6536\u53d1\u65e0\u8fb9\u754c\u3002\u670d\u52a1\u5668\u7aef\u5373\u4f7f\u8c03\u75281 \u6b21write \u51fd\u6570\u4f20\u8f9340 \u5b57 \u8282\u7684\u6570\u636e，\u5ba2\u6237\u7aef\u4e5f\u6709\u53ef\u80fd\u901a\u8fc74 \u6b21read \u51fd\u6570\u8c03\u7528\u6bcf\u6b21\u8bfb\u53d610 \u5b57\u8282\u3002\u4f46\u6b64\u5904\u4e5f\u6709\u4e00\u4e9b\u7591\u95ee， \u670d\u52a1\u5668\u7aef\u4e00\u6b21\u6027\u4f20\u8f93\u4e8640 \u5b57\u8282，\u800c\u5ba2\u6237\u7aef\u5c45\u7136\u53ef\u4ee5\u7f13\u6162\u5730\u5206\u6279\u63a5\u6536\u3002\u5ba2\u6237\u7aef\u63a5\u653610 \u5b57\u8282\u540e， \u5269\u4e0b\u768430 \u5b57\u8282\u5728\u4f55\u5904\u7b49\u5019\u5462?\u662f\u4e0d\u662f\u50cf\u98de\u673a\u4e3a\u7b49\u5f85\u7740\u9646\u800c\u5728\u7a7a\u4e2d\u76d8\u65cb\u4e00\u6837，\u5269\u4e0b30 \u5b57\u8282\u4e5f \u5728\u7f51\u7edc\u4e2d\u5f98\u5f8a\u5e76\u7b49\u5f85\u63a5\u6536\u5462? \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b9e\u9645\u4e0a，write \u51fd\u6570\u8c03\u7528\u540e\u5e76\u975e\u7acb\u5373\u4f20\u8f93\u6570\u636e，read \u51fd\u6570\u8c03\u7528\u540e\u4e5f\u5e76\u975e\u9a6c\u4e0a\u63a5\u6536\u6570\u636e<\/span>\u3002 \u66f4\u51c6\u786e\u5730\u8bf4，\u5982\u4e0b\u56fe\u6240\u793a，write \u51fd\u6570\u8c03\u7528\u77ac\u95f4，\u6570\u636e\u5c06\u79fb\u81f3\u8f93\u51fa\u7f13\u51b2<\/span>;read \u51fd\u6570\u8c03\u7528\u77ac\u95f4， \u4ece\u8f93\u4eba\u7f13\u51b2<\/span>\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8c03\u7528write \u51fd\u6570\u65f6，\u6570\u636e\u5c06\u79fb\u5230\u8f93\u51fa\u7f13\u51b2，\u5728\u9002\u5f53\u7684\u65f6\u5019（\u4e0d\u7ba1\u662f\u5206\u522b\u4f20\u9001\u8fd8\u662f\u4e00\u6b21\u6027 \u4f20\u9001）\u4f20\u5411\u5bf9\u65b9\u7684\u8f93\u5165\u7f13\u51b2\u3002\u8fd9\u65f6\u5bf9\u65b9\u5c06\u8c03\u7528read \u51fd\u6570\u4ece\u8f93\u5165\u7f13\u51b2\u8bfb\u53d6\u6570\u636e\u3002\u8fd9\u4e9bI\/O \u7f13 \u51b2\u7279\u6027\u53ef\u6574\u7406\u5982\u4e0b\u3002 A: I\/O \u7f13\u51b2\u5728\u6bcf\u4e2aTCP \u5957\u63a5\u5b57\u4e2d\u5355\u72ec\u5b58\u5728\u3002 B: I\/O \u7f13\u51b2\u5728\u521b\u5efa\u5957\u63a5\u5b57\u65f6\u81ea\u52a8\u751f\u6210\u3002 C: \u5373\u4f7f\u5173\u95ed\u5957\u63a5\u5b57\u4e5f\u4f1a\u7ee7\u7eed\u4f20\u9012\u8f93\u51fa\u7f13\u51b2<\/span>\u4e2d\u9057\u7559\u7684\u6570\u636e\u3002 D: \u5173\u95ed\u5957\u63a5\u5b57\u5c06\u4e22\u5931\u8f93\u5165\u7f13\u51b2<\/span>\u4e2d\u7684\u6570\u636e\u3002 \u90a3\u4e48，\u4e0b\u9762\u8fd9\u79cd\u60c5\u51b5\u4f1a\u5f15\u53d1\u4ec0\u4e48\u4e8b\u60c5?\u7406\u89e3\u4e86I\/O \u7f13\u51b2\u540e，\u5176\u6d41\u7a0b\u2236 "\u5ba2\u6237\u7aef\u8f93\u5165\u7f13\u51b2\u4e3a50 \u5b57\u8282，\u800c\u670d\u52a1\u5668\u7aef\u4f20\u8f93\u4e86100 \u5b57\u8282\u3002" \u8fd9\u7684\u786e\u662f\u4e2a\u95ee\u9898\u3002\u8f93\u5165\u7f13\u51b2\u53ea\u670950 \u5b57\u8282，\u5374\u6536\u5230\u4e86100 \u5b57\u8282\u7684\u6570\u636e\u3002\u53ef\u4ee5\u63d0\u51fa\u5982\u4e0b\u89e3\u51b3\u65b9 \u6848\u2236\u586b\u6ee1\u8f93\u5165\u7f13\u51b2\u524d\u8fc5\u901f\u8c03\u7528read \u51fd\u6570\u8bfb\u53d6\u6570\u636e<\/span>，\u8fd9\u6837\u4f1a\u817e\u51fa\u4e00\u90e8\u5206\u7a7a\u95f4，\u95ee\u9898\u5c31\u89e3\u51b3\u4e86\u3002 \u5176\u5b9e\u6839\u672c\u4e0d\u4f1a\u53d1\u751f\u8fd9\u7c7b\u95ee\u9898，\u56e0\u4e3aTCP \u4f1a\u63a7\u5236\u6570\u636e\u6d41\u3002 TCP \u4e2d\u6709\u6ed1\u52a8\u7a97\u53e3（Sliding Window）\u534f\u8bae，\u7528\u5bf9\u8bdd\u65b9\u5f0f\u5448\u73b0\u5982\u4e0b\u3002 \u5957\u63a5\u5b57A\u2236"\u4f60\u597d，\u6700\u591a\u53ef\u4ee5\u5411\u6211\u4f20\u901250 \u5b57\u8282\u3002" \u5957\u63a5\u5b57B\u2236"OK!" \u5957\u63a5\u5b57A\u2236"\u6211\u817e\u51fa\u4e8620 \u5b57\u8282\u7684\u7a7a\u95f4，\u6700\u591a\u53ef\u4ee5\u653670 \u5b57\u8282\u3002 \u5957\u63a5\u5b57B\u2236"OK!"\u00a0<\/p>\n

\u6570\u636e\u6536\u53d1\u4e5f\u662f\u5982\u6b64，\u56e0\u6b64TCP \u4e2d\u4e0d\u4f1a\u56e0\u4e3a\u7f13\u51b2\u6ea2\u51fa\u800c\u4e22\u5931\u6570\u636e<\/span>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e22\u6b21\uff0c\u6536\u85cf20\u6b21\u3002\u4e3a\u4ec0\u4e48\u9700\u8981\u7406\u89e3\u534f\u8bae\u6808\uff1f\u6839\u636e\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\u7684\u4e0d\u540c\uff0c\u57fa\u4e8e\u7f51\u7edc\u534f\u8bae\uff08\u8fd9\u91cc\u662f\u6307\u57fa\u4e8eTCP\/IP\u534f\u8bae\uff09\u7684\u5957\u63a5\u5b57\u4e00\u822c\u5206\u4e3aTCP \u5957\u63a5\u5b57\u548cUDP \u5957\u63a5\u5b57\u3002\u56e0\u4e3aTCP \u5957\u63a5\u5b57\u662f\u9762\u5411\u8fde\u63a5\u7684\uff0c\u56e0\u6b64\u53c8\u79f0\u57fa\u4e8e\u6d41\uff08stream\uff09\u7684\u5957\u63a5\u5b57\u3002TCP \u662fTransmissionControl Protocol\uff08\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff09\u7684\u7b80\u5199\uff0c\u610f\u4e3a"\u5bf9\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u7684\u63a7\u5236"\u3002_tcp\u56de\u58f0<\/p>\n","protected":false},"author":2,"featured_media":31662,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,2564,58,205,371,43,78,191],"topic":[],"class_list":["post-31670","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-issue","tag-linux","tag-tcp-ip","tag-371","tag-43","tag-78","tag-191"],"yoast_head":"\n# issue 7 TCP\u56de\u58f0\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/31670.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"# issue 7 TCP\u56de\u58f0\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e22\u6b21\uff0c\u6536\u85cf20\u6b21\u3002\u4e3a\u4ec0\u4e48\u9700\u8981\u7406\u89e3\u534f\u8bae\u6808\uff1f\u6839\u636e\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\u7684\u4e0d\u540c\uff0c\u57fa\u4e8e\u7f51\u7edc\u534f\u8bae\uff08\u8fd9\u91cc\u662f\u6307\u57fa\u4e8eTCP\/IP\u534f\u8bae\uff09\u7684\u5957\u63a5\u5b57\u4e00\u822c\u5206\u4e3aTCP \u5957\u63a5\u5b57\u548cUDP \u5957\u63a5\u5b57\u3002\u56e0\u4e3aTCP \u5957\u63a5\u5b57\u662f\u9762\u5411\u8fde\u63a5\u7684\uff0c\u56e0\u6b64\u53c8\u79f0\u57fa\u4e8e\u6d41\uff08stream\uff09\u7684\u5957\u63a5\u5b57\u3002TCP \u662fTransmissionControl Protocol\uff08\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff09\u7684\u7b80\u5199\uff0c\u610f\u4e3a"\u5bf9\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u7684\u63a7\u5236"\u3002_tcp\u56de\u58f0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/31670.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-21T19:21:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250421192104-68069aa0d2f1e.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/31670.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/31670.html\",\"name\":\"# issue 7 TCP\u56de\u58f0\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef - 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