\n| ntohl()<\/td>\n | Network\u00a0to\u00a0Host\u00a0Long<\/td>\n | \u53cd\u5411\u8f6c\u6362（\u8bfb\u5bf9\u65b9 IP \u65f6\u7528）<\/td>\n | \u7565<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u26a0\ufe0f\u00a0\u65b0\u624b\u6700\u5bb9\u6613\u8e29\u7684\u5751：\u76f4\u63a5\u628a\u00a08080\u00a0\u8d4b\u503c\u7ed9\u00a0sin_port，\u4e0d\u8c03\u7528\u00a0htons()\u3002\u7f16\u8bd1\u901a\u8fc7\u3001\u8fd0\u884c\u4e0d\u62a5\u9519，\u4f46\u6b7b\u6d3b\u8fde\u4e0d\u4e0a\u2014\u2014\u56e0\u4e3a\u4f60\u7684 8080 \u88ab\u5bf9\u65b9\u673a\u5668\u5f53\u6210\u4e00\u4e2a\u5929\u6587\u6570\u5b57\u7684\u7aef\u53e3\u53f7\u4e86\u3002<\/p>\n \u7b2c3\u6b65：sockaddr\u00a0\u548c\u00a0sockaddr_in\u00a0\u7684"\u5957\u5a03"\u5173\u7cfb<\/h4>\nbind()\u3001connect()\u3001accept()\u00a0\u8fd9\u4e9b\u51fd\u6570\u8981\u6c42\u7684\u53c2\u6570\u7c7b\u578b\u662f\u00a0struct sockaddr *（\u901a\u7528\u5730\u5740\u7ed3\u6784）\u3002\u4f46\u6211\u4eec\u5b9e\u9645\u586b\u7684\u662f\u00a0struct sockaddr_in（IPv4 \u4e13\u7528）\u3002\u600e\u4e48\u529e？\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u5373\u53ef：<\/p>\n \/\/ \u6211\u4eec\u5b9e\u9645\u7528\u7684\u662f sockaddr_in
\nstruct sockaddr_in server_addr;
\n\/\/ \u4f20\u7ed9 bind \u65f6\u5f3a\u884c\u8f6c\u6210 sockaddr *
\nbind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr));<\/p>\n \u4f60\u4f1a\u5728\u51e0\u4e4e\u6240\u6709\u7f51\u7edc\u4ee3\u7801\u91cc\u770b\u5230\u8fd9\u79cd\u00a0(struct sockaddr *)\u00a0\u7684\u5199\u6cd5\u3002\u8bb0\u4f4f\u53e3\u8bc0：\u5199\u7684\u65f6\u5019\u7528\u00a0_in，\u4f20\u7684\u65f6\u5019\u5f3a\u8f6c\u3002<\/p>\n
\n\u7b2c\u4e8c\u90e8\u5206：\u670d\u52a1\u5668\u7aef \u2014\u2014 \u624b\u628a\u624b\u5199\u51fa Echo \u670d\u52a1\u5668<\/h3>\n\u76ee\u6807：\u5199\u4e00\u4e2a\u670d\u52a1\u5668\u7a0b\u5e8f，\u5ba2\u6237\u7aef\u8fde\u4e0a\u6765\u53d1\u4ec0\u4e48，\u670d\u52a1\u5668\u5c31\u539f\u6837\u56de\u4ec0\u4e48\u3002<\/p>\n \u7b2c1\u6b65：\u521b\u5efa\u6587\u4ef6\u5e76\u5199\u4ee3\u7801<\/h4>\n\u5728\u7ec8\u7aef\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\u521b\u5efa\u6e90\u6587\u4ef6：<\/p>\n # \u8fdb\u5165\u4f60\u7684\u5b66\u4e60\u76ee\u5f55（\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u4fee\u6539）
\ncd ~\/linux-learning
\n# \u521b\u5efa\u6e90\u6587\u4ef6
\nnano tcp_server.c<\/p>\n \u5c06\u4ee5\u4e0b\u5b8c\u6574\u4ee3\u7801\u7c98\u8d34\u8fdb\u53bb，\u7136\u540e\u6309\u00a0Ctrl+O\u00a0\u4fdd\u5b58，Ctrl+X\u00a0\u9000\u51fa：<\/p>\n #include <stdio.h> \/\/ printf, perror
\n#include <stdlib.h> \/\/ exit
\n#include <string.h> \/\/ memset, strlen
\n#include <unistd.h> \/\/ read, write, close
\n#include <sys\/socket.h> \/\/ socket, bind, listen, accept
\n#include <netinet\/in.h> \/\/ sockaddr_in, INADDR_ANY, htons
\n#include <arpa\/inet.h> \/\/ inet_ntoa<\/p>\n #define PORT 8080 \/\/ \u670d\u52a1\u5668\u7aef\u53e3\u53f7，\u53ef\u4ee5\u6539\u6210\u522b\u7684
\n#define BUFFER_SIZE 1024 \/\/ \u6536\u53d1\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n int main() {
\n int server_fd, client_fd; \/\/ server_fd=\u76d1\u542c\u5957\u63a5\u5b57, client_fd=\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7684\u5957\u63a5\u5b57
\n struct sockaddr_in server_addr, client_addr; \/\/ \u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f
\n socklen_t client_len = sizeof(client_addr); \/\/ accept \u9700\u8981\u7684\u957f\u5ea6\u53c2\u6570
\n char buffer[BUFFER_SIZE]; \/\/ \u6570\u636e\u7f13\u51b2\u533a
\n int n; \/\/ read \u7684\u8fd4\u56de\u503c（\u8bfb\u5230\u591a\u5c11\u5b57\u8282）<\/p>\n \/\/ === \u7b2c1\u6b65：\u521b\u5efa\u5957\u63a5\u5b57（\u76f8\u5f53\u4e8e\u4e70\u4e00\u90e8\u7535\u8bdd） ===
\n \/\/ AF_INET=IPv4, SOCK_STREAM=TCP\u534f\u8bae, 0=\u81ea\u52a8\u9009\u62e9
\n server_fd = socket(AF_INET, SOCK_STREAM, 0);
\n if (server_fd < 0) { \/\/ \u8fd4\u56de -1 \u8868\u793a\u521b\u5efa\u5931\u8d25
\n perror("socket"); \/\/ \u6253\u5370\u7cfb\u7edf\u9519\u8bef\u4fe1\u606f
\n exit(1); \/\/ \u76f4\u63a5\u9000\u51fa
\n }<\/p>\n \/\/ === \u7b2c2\u6b65：\u586b\u5199\u670d\u52a1\u5668\u5730\u5740\u4fe1\u606f（\u76f8\u5f53\u4e8e\u5370\u540d\u7247） ===
\n memset(&server_addr, 0, sizeof(server_addr)); \/\/ \u5148\u628a\u6574\u5757\u5185\u5b58\u6e05\u96f6
\n server_addr.sin_family = AF_INET; \/\/ IPv4
\n server_addr.sin_port = htons(PORT); \/\/ \u7aef\u53e3\u53f7，\u5fc5\u987b htons \u8f6c\u6362
\n server_addr.sin_addr.s_addr = INADDR_ANY; \/\/ \u76d1\u542c\u672c\u673a\u6240\u6709\u7f51\u5361<\/p>\n \/\/ === \u7b2c3\u6b65：\u7ed1\u5b9a\u5730\u5740（\u76f8\u5f53\u4e8e\u516c\u5e03\u7535\u8bdd\u53f7\u7801） ===
\n if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
\n perror("bind"); \/\/ \u6700\u5e38\u89c1\u5931\u8d25\u539f\u56e0：\u7aef\u53e3\u88ab\u5360\u7528
\n close(server_fd); \/\/ \u5148\u5173\u6389\u5957\u63a5\u5b57\u518d\u9000\u51fa
\n exit(1);
\n }<\/p>\n \/\/ === \u7b2c4\u6b65：\u5f00\u59cb\u76d1\u542c（\u76f8\u5f53\u4e8e\u5750\u5728\u5e97\u91cc\u7b49\u7535\u8bdd\u54cd） ===
\n \/\/ \u7b2c\u4e8c\u4e2a\u53c2\u6570 5 \u8868\u793a\u6700\u591a\u5141\u8bb8 5 \u4e2a\u8fde\u63a5\u5728\u6392\u961f\u7b49\u5f85
\n if (listen(server_fd, 5) < 0) {
\n perror("listen");
\n close(server_fd);
\n exit(1);
\n }<\/p>\n printf("\u670d\u52a1\u5668\u542f\u52a8，\u6b63\u5728\u76d1\u542c\u7aef\u53e3 %d …\\\\n", PORT);
\n printf("\u63d0\u793a：\u6253\u5f00\u53e6\u4e00\u4e2a\u7ec8\u7aef\u8fd0\u884c .\/tcp_client \u6765\u8fde\u63a5\\\\n");<\/p>\n \/\/ === \u7b2c5\u6b65：\u5faa\u73af\u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5 ===
\n while (1) {
\n \/\/ accept \u4f1a\u963b\u585e\u5728\u8fd9\u91cc，\u76f4\u5230\u6709\u5ba2\u6237\u7aef\u8fde\u4e0a\u6765
\n client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &client_len);
\n if (client_fd < 0) {
\n perror("accept");
\n continue; \/\/ \u5931\u8d25\u4e86\u5c31\u7ee7\u7eed\u7b49\u4e0b\u4e00\u4e2a
\n }<\/p>\n \/\/ \u6253\u5370\u5ba2\u6237\u7aef\u7684 IP \u548c\u7aef\u53e3
\n printf("\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u8fdb\u6765\u4e86: %s:%d\\\\n",
\n inet_ntoa(client_addr.sin_addr), \/\/ \u628a\u4e8c\u8fdb\u5236 IP \u8f6c\u6210\u53ef\u8bfb\u5b57\u7b26\u4e32
\n ntohs(client_addr.sin_port)); \/\/ \u628a\u7f51\u7edc\u5b57\u8282\u5e8f\u7aef\u53e3\u8f6c\u56de\u6765<\/p>\n \/\/ === \u7b2c6\u6b65：\u6536\u53d1\u6570\u636e（Echo \u56de\u663e） ===
\n \/\/ \u5faa\u73af\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e
\n while ((n = read(client_fd, buffer, sizeof(buffer) – 1)) > 0) {
\n buffer[n] = '\\\\0'; \/\/ \u624b\u52a8\u52a0\u5b57\u7b26\u4e32\u7ed3\u675f\u7b26，\u9632\u6b62 printf \u8d8a\u754c
\n printf("\u6536\u5230: %s", buffer);
\n \/\/ \u539f\u6837\u5199\u56de\u7ed9\u5ba2\u6237\u7aef
\n write(client_fd, buffer, n);
\n }<\/p>\n \/\/ \u5faa\u73af\u7ed3\u675f：\u8981\u4e48 n==0（\u5ba2\u6237\u7aef\u4e3b\u52a8\u65ad\u5f00），\u8981\u4e48 n<0（\u51fa\u9519）
\n if (n < 0) {
\n perror("read");
\n } else {
\n printf("\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\\\\n");
\n }<\/p>\n \/\/ === \u7b2c7\u6b65：\u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57 ===
\n close(client_fd);
\n }<\/p>\n \/\/ \u7406\u8bba\u4e0a\u4e0d\u4f1a\u6267\u884c\u5230\u8fd9\u91cc（\u4e0a\u9762\u662f\u6b7b\u5faa\u73af），\u4f46\u5199\u4e0a\u662f\u597d\u4e60\u60ef
\n close(server_fd);
\n return 0;
\n}<\/p>\n \u7b2c2\u6b65：\u9010\u884c\u7406\u89e3\u6bcf\u4e2a\u51fd\u6570\u5728\u5e72\u4ec0\u4e48<\/h4>\n\u4e0b\u9762\u8fd9\u5f20\u8868\u662f\u6574\u4e2a\u670d\u52a1\u5668\u7aef\u7684"\u9aa8\u67b6"\u3002\u628a\u5b83\u6253\u5370\u51fa\u6765\u8d34\u5728\u663e\u793a\u5668\u65c1\u8fb9，\u5199\u4ee3\u7801\u65f6\u5bf9\u7167\u7740\u770b：<\/p>\n \n\n\n| \u64cd\u4f5c\u6b65\u9aa4<\/td>\n | \u8c03\u7528\u7684\u51fd\u6570<\/td>\n | \u5b83\u5728\u5e72\u4ec0\u4e48（\u5927\u767d\u8bdd）<\/td>\n | \u5173\u952e\u53c2\u6570<\/td>\n<\/tr>\n | \n| \u7b2c1\u6b65<\/td>\n | socket(AF_INET, SOCK_STREAM, 0)<\/td>\n | \u4e70\u4e00\u90e8"\u7535\u8bdd"<\/td>\n | SOCK_STREAM\u00a0= TCP，SOCK_DGRAM\u00a0= UDP<\/td>\n<\/tr>\n | \n| \u7b2c2\u6b65<\/td>\n | \u586b\u5145\u00a0sockaddr_in<\/td>\n | \u586b\u5feb\u9012\u5355：IP + \u7aef\u53e3<\/td>\n | htons(PORT)\u00a0\u5fc5\u987b\u52a0<\/td>\n<\/tr>\n | \n| \u7b2c3\u6b65<\/td>\n | bind()<\/td>\n | \u628a\u7535\u8bdd\u53f7\u7801\u516c\u5e03\u51fa\u53bb<\/td>\n | \u7aef\u53e3\u88ab\u5360\u7528\u4f1a\u5931\u8d25<\/td>\n<\/tr>\n | \n| \u7b2c4\u6b65<\/td>\n | listen(server_fd, 5)<\/td>\n | \u5750\u4e0b\u6765\u7b49\u7535\u8bdd<\/td>\n | 5\u00a0= \u6700\u591a\u540c\u65f6\u6392\u961f 5 \u4e2a\u8fde\u63a5<\/td>\n<\/tr>\n | \n| \u7b2c5\u6b65<\/td>\n | accept()<\/td>\n | \u63a5\u8d77\u7535\u8bdd，\u62ff\u5230\u4e00\u4e2a"\u901a\u8bdd\u7ebf\u8def"<\/td>\n | \u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 fd，\u4e13\u95e8\u8ddf\u8fd9\u4e2a\u5ba2\u6237\u7aef\u804a<\/td>\n<\/tr>\n | \n| \u7b2c6\u6b65<\/td>\n | read()\u00a0\/\u00a0write()<\/td>\n | \u901a\u8bdd：\u542c\u5bf9\u65b9\u8bf4\u8bdd \/ \u56de\u8bdd<\/td>\n | \u548c\u6587\u4ef6\u8bfb\u5199\u4e00\u6a21\u4e00\u6837<\/td>\n<\/tr>\n | \n| \u7b2c7\u6b65<\/td>\n | close(client_fd)<\/td>\n | \u6302\u65ad\u8fd9\u901a\u7535\u8bdd<\/td>\n | \u5148\u5173\u5ba2\u6237\u7aef fd，\u6700\u540e\u5173\u670d\u52a1\u5668 fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u26a0\ufe0f\u00a0\u65b0\u624b\u6700\u5bb9\u6613\u641e\u6df7\u7684\u5730\u65b9：server_fd\u00a0\u548c\u00a0client_fd\u00a0\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u4e1c\u897f\u3002server_fd\u00a0\u53ea\u8d1f\u8d23"\u63a5\u7535\u8bdd"（\u76d1\u542c），\u4ece\u4e0d\u4f20\u8f93\u6570\u636e\u3002client_fd\u00a0\u662f\u00a0accept\u00a0\u8fd4\u56de\u7684，\u4e13\u95e8\u7528\u6765\u548c\u67d0\u4e00\u4e2a\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e\u3002\u628a\u5b83\u4eec\u60f3\u8c61\u6210"\u603b\u673a"\u548c"\u5206\u673a"\u5c31\u4e0d\u4f1a\u641e\u6df7\u4e86\u3002<\/p>\n
\n\u7b2c\u4e09\u90e8\u5206：\u5ba2\u6237\u7aef \u2014\u2014 \u624b\u628a\u624b\u5199\u51fa Echo \u5ba2\u6237\u7aef<\/h3>\n\u7b2c1\u6b65：\u521b\u5efa\u6587\u4ef6\u5e76\u5199\u4ee3\u7801<\/h4>\n\u521b\u5efa\u5ba2\u6237\u7aef\u6e90\u6587\u4ef6：<\/p>\n # \u521b\u5efa\u5ba2\u6237\u7aef\u6e90\u6587\u4ef6
\nnano tcp_client.c<\/p>\n \u5c06\u4ee5\u4e0b\u4ee3\u7801\u7c98\u8d34\u8fdb\u53bb，\u4fdd\u5b58\u9000\u51fa：<\/p>\n #include <stdio.h> \/\/ printf, fgets, perror
\n#include <stdlib.h> \/\/ exit
\n#include <string.h> \/\/ memset, strlen, strncmp
\n#include <unistd.h> \/\/ read, write, close
\n#include <sys\/socket.h> \/\/ socket, connect
\n#include <netinet\/in.h> \/\/ sockaddr_in, htons
\n#include <arpa\/inet.h> \/\/ inet_pton<\/p>\n #define PORT 8080 \/\/ \u8fde\u63a5\u54ea\u4e2a\u7aef\u53e3（\u5fc5\u987b\u548c\u670d\u52a1\u5668\u4e00\u81f4）
\n#define BUFFER_SIZE 1024 \/\/ \u6536\u53d1\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n int main() {
\n int sock; \/\/ \u5ba2\u6237\u7aef\u53ea\u6709\u4e00\u4e2a\u5957\u63a5\u5b57\u5c31\u591f\u4e86
\n struct sockaddr_in server_addr; \/\/ \u670d\u52a1\u5668\u7684\u5730\u5740\u4fe1\u606f
\n char send_buf[BUFFER_SIZE]; \/\/ \u53d1\u9001\u7f13\u51b2\u533a
\n char recv_buf[BUFFER_SIZE]; \/\/ \u63a5\u6536\u7f13\u51b2\u533a
\n int n;<\/p>\n \/\/ === \u7b2c1\u6b65：\u521b\u5efa\u5957\u63a5\u5b57 ===
\n sock = socket(AF_INET, SOCK_STREAM, 0);
\n if (sock < 0) {
\n perror("socket");
\n exit(1);
\n }<\/p>\n \/\/ === \u7b2c2\u6b65：\u586b\u5199\u76ee\u6807\u670d\u52a1\u5668\u7684\u5730\u5740 ===
\n memset(&server_addr, 0, sizeof(server_addr));
\n server_addr.sin_family = AF_INET;
\n server_addr.sin_port = htons(PORT); \/\/ \u7aef\u53e3\u53f7，\u5fc5\u987b htons<\/p>\n \/\/ inet_pton：\u628a "127.0.0.1" \u8fd9\u79cd\u4eba\u7c7b\u53ef\u8bfb\u7684 IP \u8f6c\u6210\u4e8c\u8fdb\u5236\u683c\u5f0f
\n \/\/ 127.0.0.1 \u662f"\u672c\u673a\u73af\u56de\u5730\u5740"，\u610f\u601d\u5c31\u662f\u8fde\u81ea\u5df1\u8fd9\u53f0\u7535\u8111
\n if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
\n perror("inet_pton"); \/\/ \u5931\u8d25\u901a\u5e38\u56e0\u4e3a IP \u5730\u5740\u683c\u5f0f\u5199\u9519\u4e86
\n close(sock);
\n exit(1);
\n }<\/p>\n \/\/ === \u7b2c3\u6b65：\u8fde\u63a5\u670d\u52a1\u5668（\u76f8\u5f53\u4e8e\u62e8\u53f7） ===
\n \/\/ connect \u4f1a\u89e6\u53d1 TCP \u4e09\u6b21\u63e1\u624b，\u963b\u585e\u76f4\u5230\u8fde\u63a5\u6210\u529f\u6216\u8d85\u65f6
\n if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
\n perror("connect"); \/\/ \u6700\u5e38\u89c1\u5931\u8d25\u539f\u56e0：\u670d\u52a1\u5668\u6ca1\u542f\u52a8
\n close(sock);
\n exit(1);
\n }
\n printf("\u5df2\u8fde\u63a5\u5230\u670d\u52a1\u5668 127.0.0.1:%d\\\\n", PORT);
\n printf("\u73b0\u5728\u53ef\u4ee5\u8f93\u5165\u6587\u5b57\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u4e86\u3002\u8f93\u5165 quit \u9000\u51fa\u3002\\\\n");<\/p>\n \/\/ === \u7b2c4\u6b65：\u5faa\u73af\u8f93\u5165\u5e76\u6536\u53d1\u6570\u636e ===
\n while (1) {
\n printf("> "); \/\/ \u63d0\u793a\u7b26
\n fflush(stdout); \/\/ \u5f3a\u5236\u5237\u65b0，\u786e\u4fdd > \u7acb\u5373\u663e\u793a<\/p>\n \/\/ \u4ece\u952e\u76d8\u8bfb\u53d6\u4e00\u884c\u8f93\u5165
\n fgets(send_buf, sizeof(send_buf), stdin);
\n \/\/ \u8f93\u5165 "quit" \u5c31\u9000\u51fa
\n if (strncmp(send_buf, "quit", 4) == 0) {
\n break;
\n }<\/p>\n \/\/ \u53d1\u9001\u7ed9\u670d\u52a1\u5668
\n write(sock, send_buf, strlen(send_buf));<\/p>\n \/\/ \u63a5\u6536\u670d\u52a1\u5668\u7684\u56de\u663e
\n n = read(sock, recv_buf, sizeof(recv_buf) – 1);
\n if (n <= 0) {
\n if (n == 0)
\n printf("\u670d\u52a1\u5668\u5173\u95ed\u4e86\u8fde\u63a5\\\\n");
\n else
\n perror("read");
\n break;
\n }
\n recv_buf[n] = '\\\\0'; \/\/ \u624b\u52a8\u52a0\u7ed3\u675f\u7b26
\n printf("\u56de\u663e: %s", recv_buf);
\n }<\/p>\n \/\/ === \u7b2c5\u6b65：\u5173\u95ed\u5957\u63a5\u5b57 ===
\n close(sock);
\n return 0;
\n}<\/p>\n \u7b2c2\u6b65：\u5ba2\u6237\u7aef\u6d41\u7a0b\u901f\u67e5\u8868<\/h4>\n\n\n\n| \u64cd\u4f5c\u6b65\u9aa4<\/td>\n | \u8c03\u7528\u7684\u51fd\u6570<\/td>\n | \u5b83\u5728\u5e72\u4ec0\u4e48<\/td>\n | \u548c\u670d\u52a1\u5668\u6709\u4ec0\u4e48\u533a\u522b<\/td>\n<\/tr>\n | \n| \u7b2c1\u6b65<\/td>\n | socket()<\/td>\n | \u521b\u5efa\u5957\u63a5\u5b57<\/td>\n | \u548c\u670d\u52a1\u5668\u4e00\u6837<\/td>\n<\/tr>\n | \n| \u7b2c2\u6b65<\/td>\n | \u586b\u00a0sockaddr_in<\/td>\n | \u6307\u5b9a\u76ee\u6807\u670d\u52a1\u5668\u5730\u5740<\/td>\n | \u670d\u52a1\u5668\u586b\u81ea\u5df1\u7684 IP，\u5ba2\u6237\u7aef\u586b\u5bf9\u65b9\u7684 IP<\/td>\n<\/tr>\n | \n| \u7b2c3\u6b65<\/td>\n | connect()<\/td>\n | \u4e3b\u52a8\u53d1\u8d77\u8fde\u63a5<\/td>\n | \u5ba2\u6237\u7aef\u72ec\u6709，\u670d\u52a1\u5668\u4e0d\u9700\u8981\u8fd9\u6b65<\/td>\n<\/tr>\n | \n| \u7b2c4\u6b65<\/td>\n | write()\u00a0\/\u00a0read()<\/td>\n | \u6536\u53d1\u6570\u636e<\/td>\n | \u548c\u670d\u52a1\u5668\u4e00\u6837<\/td>\n<\/tr>\n | \n| \u7b2c5\u6b65<\/td>\n | close()<\/td>\n | \u5173\u95ed\u8fde\u63a5<\/td>\n | \u548c\u670d\u52a1\u5668\u4e00\u6837<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u26a0\ufe0f\u00a0\u5173\u952e\u533a\u522b：\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u00a0bind()\u00a0\u548c\u00a0listen()\u00a0\u548c\u00a0accept()\u3002\u5ba2\u6237\u7aef\u53ea\u9700\u00a0socket()\u00a0\u2192\u00a0connect()\u00a0\u2192 \u6536\u53d1 \u2192\u00a0close()\u3002\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u7ed9\u5ba2\u6237\u7aef\u5206\u914d\u4e00\u4e2a\u4e34\u65f6\u7aef\u53e3\u3002<\/p>\n
\n\u7b2c\u56db\u90e8\u5206：\u7f16\u8bd1\u8fd0\u884c \u2014\u2014 \u4eb2\u773c\u770b\u5230\u4e24\u53f0"\u865a\u62df\u7535\u8bdd"\u901a\u8bdd<\/h3>\n\u7b2c1\u6b65：\u7f16\u8bd1\u4e24\u4e2a\u7a0b\u5e8f<\/h4>\n# \u7f16\u8bd1\u670d\u52a1\u5668（-o \u540e\u9762\u662f\u8f93\u51fa\u7684\u53ef\u6267\u884c\u6587\u4ef6\u540d）
\ngcc -o tcp_server tcp_server.c<\/p>\n # \u7f16\u8bd1\u5ba2\u6237\u7aef
\ngcc -o tcp_client tcp_client.c<\/p>\n \u26a0\ufe0f \u5982\u679c\u63d0\u793a\u00a0gcc: command not found，\u8bf4\u660e\u6ca1\u88c5\u7f16\u8bd1\u5668\u3002\u6267\u884c：sudo apt install gcc（Ubuntu\/Debian）\u6216\u00a0sudo yum install gcc（CentOS）\u3002<\/p>\n \u7b2c2\u6b65：\u6253\u5f00\u4e24\u4e2a\u7ec8\u7aef\u7a97\u53e3<\/h4>\n\u7ec8\u7aef1（\u670d\u52a1\u5668\u7aef）：<\/p>\n .\/tcp_server
\n# \u4f60\u4f1a\u770b\u5230：
\n# \u670d\u52a1\u5668\u542f\u52a8，\u6b63\u5728\u76d1\u542c\u7aef\u53e3 8080 …
\n# \u63d0\u793a：\u6253\u5f00\u53e6\u4e00\u4e2a\u7ec8\u7aef\u8fd0\u884c .\/tcp_client \u6765\u8fde\u63a5<\/p>\n \u7ec8\u7aef2（\u5ba2\u6237\u7aef）：<\/p>\n .\/tcp_client
\n# \u4f60\u4f1a\u770b\u5230：
\n# \u5df2\u8fde\u63a5\u5230\u670d\u52a1\u5668 127.0.0.1:8080
\n# \u73b0\u5728\u53ef\u4ee5\u8f93\u5165\u6587\u5b57\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u4e86\u3002\u8f93\u5165 quit \u9000\u51fa\u3002
\n# ><\/p>\n \u7b2c3\u6b65：\u5f00\u59cb\u5bf9\u8bdd\u6d4b\u8bd5<\/h4>\n\u5728\u5ba2\u6237\u7aef\u7ec8\u7aef\u8f93\u5165：<\/p>\n > hello world
\n# \u56de\u663e: hello world
\n> \u4f60\u597d，\u7f51\u7edc\u7f16\u7a0b
\n# \u56de\u663e: \u4f60\u597d，\u7f51\u7edc\u7f16\u7a0b
\n> quit
\n# （\u7a0b\u5e8f\u9000\u51fa）<\/p>\n \u540c\u65f6\u89c2\u5bdf\u670d\u52a1\u5668\u7ec8\u7aef，\u4f1a\u663e\u793a：<\/p>\n \u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u8fdb\u6765\u4e86: 127.0.0.1:xxxxx
\n\u6536\u5230: hello world
\n\u6536\u5230: \u4f60\u597d，\u7f51\u7edc\u7f16\u7a0b
\n\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5<\/p>\n \u26a0\ufe0f\u00a0\u5e38\u89c1\u95ee\u9898：\u5982\u679c\u5ba2\u6237\u7aef\u663e\u793a\u00a0connect: Connection refused，99% \u662f\u56e0\u4e3a\u670d\u52a1\u5668\u6ca1\u542f\u52a8\u3002\u5148\u786e\u8ba4\u7ec8\u7aef1\u91cc\u00a0.\/tcp_server\u00a0\u8fd8\u5728\u8fd0\u884c\u3002<\/p>\n
\n\u7b2c\u4e94\u90e8\u5206：8 \u4e2a\u6838\u5fc3\u51fd\u6570\u901f\u8bb0\u5361<\/h3>\n\u628a\u8fd9 8 \u4e2a\u51fd\u6570\u6b7b\u8bb0\u786c\u80cc\u4e0b\u6765，TCP \u7f16\u7a0b\u5c31\u638c\u63e1\u4e86 80%：<\/p>\n \/\/ 1. \u521b\u5efa\u5957\u63a5\u5b57 \u2014 \u4e70\u7535\u8bdd
\nint socket(int domain, int type, int protocol);
\n\/\/ domain: AF_INET(IPv4) \u6216 AF_INET6(IPv6)
\n\/\/ type: SOCK_STREAM(TCP) \u6216 SOCK_DGRAM(UDP)
\n\/\/ protocol: \u901a\u5e38\u586b 0，\u8ba9\u7cfb\u7edf\u81ea\u52a8\u9009\u62e9<\/p>\n \/\/ 2. \u7ed1\u5b9a\u5730\u5740 \u2014 \u516c\u5e03\u7535\u8bdd\u53f7\u7801
\nint bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
\n\/\/ \u670d\u52a1\u5668\u5fc5\u8c03，\u5ba2\u6237\u7aef\u901a\u5e38\u4e0d\u7528（connect \u65f6\u7cfb\u7edf\u81ea\u52a8\u5206\u914d）<\/p>\n \/\/ 3. \u5f00\u59cb\u76d1\u542c \u2014 \u5750\u4e0b\u7b49\u7535\u8bdd
\nint listen(int sockfd, int backlog);
\n\/\/ backlog: \u7b49\u5f85\u961f\u5217\u6700\u5927\u957f\u5ea6，\u6d4b\u8bd5\u65f6\u586b 5 \u5c31\u884c<\/p>\n \/\/ 4. \u63a5\u53d7\u8fde\u63a5 \u2014 \u63a5\u8d77\u7535\u8bdd
\nint accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
\n\/\/ \u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 fd，\u4e13\u95e8\u548c\u8fd9\u4e2a\u5ba2\u6237\u7aef\u901a\u4fe1
\n\/\/ \u539f sockfd \u7ee7\u7eed\u76d1\u542c\u65b0\u8fde\u63a5<\/p>\n \/\/ 5. \u53d1\u8d77\u8fde\u63a5 \u2014 \u62e8\u53f7
\nint connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
\n\/\/ \u5ba2\u6237\u7aef\u72ec\u6709\u3002\u6210\u529f\u8fd4\u56de 0，\u5931\u8d25\u8fd4\u56de -1<\/p>\n \/\/ 6. \u8bfb\u53d6\u6570\u636e \u2014 \u542c\u5bf9\u65b9\u8bf4\u8bdd
\nssize_t read(int fd, void *buf, size_t count);
\n\/\/ \u8fd4\u56de 0 \u8868\u793a\u5bf9\u65b9\u5173\u95ed\u4e86\u8fde\u63a5（\u6302\u7535\u8bdd）
\n\/\/ \u8fd4\u56de -1 \u8868\u793a\u51fa\u9519<\/p>\n \/\/ 7. \u53d1\u9001\u6570\u636e \u2014 \u5bf9\u5bf9\u65b9\u8bf4\u8bdd
\nssize_t write(int fd, const void *buf, size_t count);
\n\/\/ \u6ce8\u610f：TCP \u662f\u6d41\u5f0f\u534f\u8bae，\u4e00\u6b21 write \u4e0d\u4e00\u5b9a\u5bf9\u5e94\u4e00\u6b21 read<\/p>\n \/\/ 8. \u5173\u95ed\u8fde\u63a5 \u2014 \u6302\u7535\u8bdd
\nint close(int fd);
\n\/\/ \u89e6\u53d1 TCP \u56db\u6b21\u6325\u624b<\/p>\n
\n\u7b2c\u4e03\u90e8\u5206：\u5e38\u89c1\u95ee\u9898\u901f\u67e5\u8868<\/h3>\n\n\n\n| \u95ee\u9898\u73b0\u8c61<\/td>\n | \u53ef\u80fd\u539f\u56e0<\/td>\n | \u89e3\u51b3\u529e\u6cd5<\/td>\n<\/tr>\n | \n| bind: Address already in use<\/td>\n | \u4e0a\u4e00\u6b21\u8fd0\u884c\u7684\u670d\u52a1\u5668\u8fd8\u6ca1\u5b8c\u5168\u91ca\u653e\u7aef\u53e3（TCP \u6709 TIME_WAIT \u72b6\u6001，\u901a\u5e38\u7b49 1-2 \u5206\u949f）<\/td>\n | \u2460\u7b49\u51e0\u5206\u949f\u518d\u8bd5；\u2461\u6216\u7528\u00a0setsockopt\u00a0\u8bbe\u7f6e\u00a0SO_REUSEADDR；\u2462\u6362\u4e2a\u7aef\u53e3\u53f7<\/td>\n<\/tr>\n | \n| connect: Connection refused<\/td>\n | \u670d\u52a1\u5668\u6ca1\u542f\u52a8，\u6216\u7aef\u53e3\u53f7\u4e0d\u4e00\u81f4<\/td>\n | \u2460\u786e\u8ba4\u00a0.\/tcp_server\u00a0\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u6b63\u5728\u8fd0\u884c；\u2461\u68c0\u67e5\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7684\u00a0PORT\u00a0\u5b8f\u662f\u5426\u4e00\u81f4<\/td>\n<\/tr>\n | \n| connect: Network is unreachable<\/td>\n | IP \u5730\u5740\u5199\u9519\u4e86，\u6216\u7f51\u7edc\u4e0d\u901a<\/td>\n | \u2460\u5148\u7528\u00a0ping 127.0.0.1\u00a0\u6d4b\u8bd5\u672c\u673a\u73af\u56de\u662f\u5426\u6b63\u5e38；\u2461\u68c0\u67e5 IP \u662f\u5426\u6709\u62fc\u5199\u9519\u8bef<\/td>\n<\/tr>\n | \n| \u5ba2\u6237\u7aef\u8f93\u5165\u4e2d\u6587，\u670d\u52a1\u5668\u663e\u793a\u4e71\u7801<\/td>\n | \u4e24\u7aef\u5b57\u7b26\u7f16\u7801\u4e0d\u4e00\u81f4<\/td>\n | \u786e\u4fdd\u4e24\u7aef\u7ec8\u7aef\u90fd\u4f7f\u7528 UTF-8 \u7f16\u7801\u3002read\/write\u00a0\u4e0d\u4fee\u6539\u5b57\u8282\u5185\u5bb9，\u4e71\u7801\u901a\u5e38\u662f\u663e\u793a\u95ee\u9898<\/td>\n<\/tr>\n | \n| \u5ba2\u6237\u7aef\u53d1\u4e86 100 \u5b57\u8282，\u670d\u52a1\u5668\u00a0read\u00a0\u53ea\u8bfb\u5230 50 \u5b57\u8282<\/td>\n | TCP \u662f\u6d41\u5f0f\u534f\u8bae，\u6ca1\u6709\u6d88\u606f\u8fb9\u754c\u3002\u4e00\u6b21\u00a0write\u00a0\u7684\u6570\u636e\u53ef\u80fd\u88ab\u62c6\u6210\u591a\u6b21\u00a0read<\/td>\n | \u5e94\u7528\u5c42\u9700\u8981\u81ea\u5df1\u5236\u5b9a\u534f\u8bae：\u2460\u56fa\u5b9a\u957f\u5ea6；\u2461\u957f\u5ea6\u524d\u7f00；\u2462\u7279\u6b8a\u5206\u9694\u7b26（\u5982\u6362\u884c\u00a0\\\\n）<\/td>\n<\/tr>\n | \n| accept\u00a0\u8fd4\u56de -1，errno\u00a0\u663e\u793a\u00a0EINTR<\/td>\n | \u7cfb\u7edf\u8c03\u7528\u88ab\u4fe1\u53f7\u4e2d\u65ad<\/td>\n | \u901a\u5e38\u52a0\u00a0if (errno == EINTR) continue;\u00a0\u5373\u53ef<\/td>\n<\/tr>\n | \n| \u7f16\u8bd1\u65f6\u62a5\u00a0undefined reference to …<\/td>\n | \u6ca1\u6709\u94fe\u63a5\u5bf9\u5e94\u7684\u5e93<\/td>\n | Socket \u51fd\u6570\u5728\u6807\u51c6 C \u5e93\u4e2d，\u4e0d\u9700\u8981\u989d\u5916\u00a0-l\u3002\u4f46\u5982\u679c\u662f\u591a\u7ebf\u7a0b\u7248\u672c\u9700\u8981\u52a0\u00a0-lpthread<\/td>\n<\/tr>\n | \n| perror: socket: Too many open files<\/td>\n | \u6587\u4ef6\u63cf\u8ff0\u7b26\u7528\u5b8c\u4e86（\u6253\u5f00\u4e86\u592a\u591a\u8fde\u63a5\u6ca1\u5173）<\/td>\n | \u2460\u68c0\u67e5\u662f\u5426\u6bcf\u4e2a\u00a0client_fd\u00a0\u90fd\u6b63\u786e\u00a0close；\u2461\u7528\u00a0ulimit -n\u00a0\u67e5\u770b\u5e76\u63d0\u9ad8\u9650\u5236<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\u4f5c\u4e1a（Day 22-23 \u5de9\u56fa\u7ec3\u4e60）<\/h3>\n\u4fee\u6539\u670d\u52a1\u5668，\u8ba9\u5b83\u5728\u6536\u5230\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u00a0bye\u00a0\u65f6\u4e3b\u52a8\u5173\u95ed\u8fde\u63a5，\u5e76\u5728\u5173\u95ed\u524d\u53d1\u9001\u00a0Goodbye!\u00a0\u7ed9\u5ba2\u6237\u7aef\u3002<\/li>\n\u7528\u00a0fork()\u00a0\u6539\u9020\u670d\u52a1\u5668，\u4f7f\u5176\u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef（\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u8d1f\u8d23\u4e00\u4e2a\u5ba2\u6237\u7aef），\u53c2\u7167\u7b2c\u516d\u90e8\u5206\u7684\u9aa8\u67b6\u4ee3\u7801\u3002<\/li>\n\u5728\u5ba2\u6237\u7aef\u589e\u52a0\u8d85\u65f6\u673a\u5236：\u5982\u679c 5 \u79d2\u5185\u6ca1\u6709\u6536\u5230\u670d\u52a1\u5668\u56de\u663e，\u81ea\u52a8\u9000\u51fa（\u63d0\u793a：\u7528\u00a0setsockopt\u00a0\u8bbe\u7f6e\u00a0SO_RCVTIMEO）\u3002<\/li>\n\u6311\u6218\u9898：\u5b9e\u73b0\u4e00\u4e2a\u7b80\u6613\u804a\u5929\u5ba4\u2014\u2014\u670d\u52a1\u5668\u6536\u5230\u4efb\u4f55\u5ba2\u6237\u7aef\u7684\u6d88\u606f\u540e，\u8f6c\u53d1\u7ed9\u6240\u6709\u5df2\u8fde\u63a5\u7684\u5ba2\u6237\u7aef（\u9700\u8981\u7ef4\u62a4\u5ba2\u6237\u7aef fd \u5217\u8868，\u53ef\u7528\u00a0select\u00a0\u6216\u591a\u7ebf\u7a0b）\u3002<\/li>\n
\n\u77e5\u8bc6\u5173\u7cfb\u56fe<\/h3>\nsocket() \u2500\u2500\u2500\u2500 \u521b\u5efa\u901a\u4fe1\u7aef\u70b9
\n \u2502
\n \u251c\u2500\u2500 \u670d\u52a1\u5668\u8def\u7ebf：bind() \u2192 listen() \u2192 accept() \u2192 read()\/write() \u2192 close()
\n \u2502
\n \u2514\u2500\u2500 \u5ba2\u6237\u7aef\u8def\u7ebf：connect() \u2192 write()\/read() \u2192 close()<\/p>\n \u6838\u5fc3\u6982\u5ff5：
\n sockaddr_in \u2500\u2500\u2500\u2500 \u5730\u5740"\u5feb\u9012\u5355"
\n htons\/htonl \u2500\u2500\u2500\u2500 \u5b57\u8282\u5e8f\u8f6c\u6362（\u5927\u7aef\u7edf\u4e00）
\n TCP \u4e09\u6b21\u63e1\u624b \u2500\u2500\u2500\u2500 connect() \u8fde\u63a5\u6210\u529f\u65f6\u5df2\u5b8c\u6210
\n TCP \u56db\u6b21\u6325\u624b \u2500\u2500\u2500\u2500 close() \u89e6\u53d1<\/p>\n
\n\u7f51\u7edc\u7f16\u7a0b\u65e0\u975e\u5c31\u662f"\u8fde\u7ebf\u3001\u8bf4\u8bdd\u3001\u6302\u7535\u8bdd"\u7684\u5faa\u73af\u3002\u4eca\u5929\u4f60\u4eb2\u624b\u5199\u51fa\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684 TCP \u901a\u4fe1\u7a0b\u5e8f\u2014\u2014\u8fd9\u4e00\u6b65\u8de8\u8d8a\u4e86"\u5355\u673a\u7f16\u7a0b"\u5230"\u7f51\u7edc\u7f16\u7a0b"\u7684\u5206\u6c34\u5cad\u3002\u591a\u6572\u51e0\u904d\u4ee3\u7801，\u8ba9\u8fd9\u4e9b\u51fd\u6570\u5f62\u6210\u808c\u8089\u8bb0\u5fc6，\u4f60\u4f1a\u53d1\u73b0\u5b83\u771f\u7684\u6ca1\u90a3\u4e48\u795e\u79d8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u7f51\u7edc\u7f16\u7a0b\u6ca1\u90a3\u4e48\u795e\u79d8，\u5c31\u50cf\u6253\u7535\u8bdd\u2014\u2014\u4e70\u624b\u673a\u3001\u63d2\u5361\u3001\u62e8\u53f7\u3001\u901a\u8bdd\u3001\u6302\u65ad，\u4e94\u4e2a\u52a8\u4f5c\u800c\u5df2\u3002\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u6362\u6210 C \u8bed\u8a00\u7684\u51e0\u4e2a\u51fd\u6570\u8c03\u7528\u3002\u5f00\u7bc7：\u5148\u5efa\u7acb\u4e00\u4e2a\u76f4\u89c9\u5728\u5b66\u4e60\u5177\u4f53\u4ee3\u7801\u4e4b\u524d，\u5148\u628a\u81ea\u5df1\u60f3\u8c61\u6210\u4e00\u5bb6\u5916\u5356\u5e97\u8001\u677f，\u4f60\u5c31\u5bb9\u6613\u7406\u89e3 TCP \u901a\u4fe1\u5230\u5e95\u5728\u5e72\u561b\u4e86：\u5916\u5356\u5e97\u573a\u666f\u5bf9\u5e94\u7684\u7f51\u7edc\u7f16\u7a0b\u6982\u5ff5\u5927\u767d\u8bdd\u5b89\u88c5\u4e00\u90e8\u5916\u5356\u4e13\u7528\u7535\u8bddsocket()\u521b\u5efa\u901a\u4fe1\u5de5\u5177\u5370\u5728\u540d\u7247\u4e0a\u7684\u7535\u8bdd\u53f7\u7801bind()\u00a0\u7ed1\u5b9a IP \u7aef\u53e3\u5bf9\u5916\u516c\u5e03\u4f60\u7684\u8054\u7cfb\u65b9\u5f0f\u5750\u5728\u5e97\u91cc\u7b49\u7535<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,205,43],"topic":[],"class_list":["post-90850","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-tcp-ip","tag-43"],"yoast_head":"\n Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \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\/90850.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u7f51\u7edc\u7f16\u7a0b\u6ca1\u90a3\u4e48\u795e\u79d8，\u5c31\u50cf\u6253\u7535\u8bdd\u2014\u2014\u4e70\u624b\u673a\u3001\u63d2\u5361\u3001\u62e8\u53f7\u3001\u901a\u8bdd\u3001\u6302\u65ad，\u4e94\u4e2a\u52a8\u4f5c\u800c\u5df2\u3002\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u6362\u6210 C \u8bed\u8a00\u7684\u51e0\u4e2a\u51fd\u6570\u8c03\u7528\u3002\u5f00\u7bc7：\u5148\u5efa\u7acb\u4e00\u4e2a\u76f4\u89c9\u5728\u5b66\u4e60\u5177\u4f53\u4ee3\u7801\u4e4b\u524d，\u5148\u628a\u81ea\u5df1\u60f3\u8c61\u6210\u4e00\u5bb6\u5916\u5356\u5e97\u8001\u677f，\u4f60\u5c31\u5bb9\u6613\u7406\u89e3 TCP \u901a\u4fe1\u5230\u5e95\u5728\u5e72\u561b\u4e86：\u5916\u5356\u5e97\u573a\u666f\u5bf9\u5e94\u7684\u7f51\u7edc\u7f16\u7a0b\u6982\u5ff5\u5927\u767d\u8bdd\u5b89\u88c5\u4e00\u90e8\u5916\u5356\u4e13\u7528\u7535\u8bddsocket()\u521b\u5efa\u901a\u4fe1\u5de5\u5177\u5370\u5728\u540d\u7247\u4e0a\u7684\u7535\u8bdd\u53f7\u7801bind()\u00a0\u7ed1\u5b9a IP \u7aef\u53e3\u5bf9\u5916\u516c\u5e03\u4f60\u7684\u8054\u7cfb\u65b9\u5f0f\u5750\u5728\u5e97\u91cc\u7b49\u7535\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/90850.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T23:33:02+00:00\" \/>\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=\"7 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/90850.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/90850.html\",\"name\":\"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-08-05T23:33:02+00:00\",\"dateModified\":\"2026-08-05T23:33:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/90850.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/90850.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/90850.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/90850.html","og_locale":"zh_CN","og_type":"article","og_title":"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u7f51\u7edc\u7f16\u7a0b\u6ca1\u90a3\u4e48\u795e\u79d8，\u5c31\u50cf\u6253\u7535\u8bdd\u2014\u2014\u4e70\u624b\u673a\u3001\u63d2\u5361\u3001\u62e8\u53f7\u3001\u901a\u8bdd\u3001\u6302\u65ad，\u4e94\u4e2a\u52a8\u4f5c\u800c\u5df2\u3002\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u6362\u6210 C \u8bed\u8a00\u7684\u51e0\u4e2a\u51fd\u6570\u8c03\u7528\u3002\u5f00\u7bc7：\u5148\u5efa\u7acb\u4e00\u4e2a\u76f4\u89c9\u5728\u5b66\u4e60\u5177\u4f53\u4ee3\u7801\u4e4b\u524d，\u5148\u628a\u81ea\u5df1\u60f3\u8c61\u6210\u4e00\u5bb6\u5916\u5356\u5e97\u8001\u677f，\u4f60\u5c31\u5bb9\u6613\u7406\u89e3 TCP \u901a\u4fe1\u5230\u5e95\u5728\u5e72\u561b\u4e86：\u5916\u5356\u5e97\u573a\u666f\u5bf9\u5e94\u7684\u7f51\u7edc\u7f16\u7a0b\u6982\u5ff5\u5927\u767d\u8bdd\u5b89\u88c5\u4e00\u90e8\u5916\u5356\u4e13\u7528\u7535\u8bddsocket()\u521b\u5efa\u901a\u4fe1\u5de5\u5177\u5370\u5728\u540d\u7247\u4e0a\u7684\u7535\u8bdd\u53f7\u7801bind()\u00a0\u7ed1\u5b9a IP \u7aef\u53e3\u5bf9\u5916\u516c\u5e03\u4f60\u7684\u8054\u7cfb\u65b9\u5f0f\u5750\u5728\u5e97\u91cc\u7b49\u7535","og_url":"https:\/\/www.wsisp.com\/helps\/90850.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-08-05T23:33:02+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"7 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/90850.html","url":"https:\/\/www.wsisp.com\/helps\/90850.html","name":"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-08-05T23:33:02+00:00","dateModified":"2026-08-05T23:33:02+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/90850.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/90850.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/90850.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"Day 22-23 TCP \u804a\u5929\u670d\u52a1\u5668\uff1a\u4ece\u96f6\u624b\u5199\u7f51\u7edc\u901a\u4fe1"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/90850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=90850"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/90850\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=90850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=90850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=90850"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=90850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | |