{"id":27137,"date":"2025-04-19T18:30:58","date_gmt":"2025-04-19T10:30:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/27137.html"},"modified":"2025-04-19T18:30:58","modified_gmt":"2025-04-19T10:30:58","slug":"socket%e6%8f%8f%e8%bf%b0%e7%ac%a6%e7%9a%84%e6%9c%ac%e8%b4%a8%ef%bc%8c%e5%ae%83%e5%8f%af%e4%bb%a5%e5%92%8c%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%bb%ba%e7%ab%8b%e8%bf%9e%e6%8e%a5%ef%bc%9f%e4%b8%80%e4%b8%aa","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/27137.html","title":{"rendered":"socket\u63cf\u8ff0\u7b26\u7684\u672c\u8d28\uff0c\u5b83\u53ef\u4ee5\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\uff1f\u4e00\u4e2a\u670d\u52a1\u5668\u548c\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\u4e2d\uff0c\u4e09\u4e2a\u64cd\u4f5c\u7b26\u7684\u4f5c\u7528\u5206\u522b\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<h4>\u00a0\u63cf\u8ff0\u7b26\u7684\u672c\u8d28<\/h4>\n<p>\u00a0 \u00a0 socket \u63cf\u8ff0\u7b26&#xff08;\u5728\u7c7b Unix \u7cfb\u7edf\u4e2d\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570&#xff0c;\u5728 Windows \u7cfb\u7edf\u4e2d\u662f\u00a0SOCKET\u00a0\u53e5\u67c4&#xff09;\u672c\u8d28\u4e0a\u662f\u64cd\u4f5c\u7cfb\u7edf\u4e3a\u4e86\u7ba1\u7406\u7f51\u7edc\u8fde\u63a5\u800c\u5206\u914d\u7684\u4e00\u4e2a\u7d22\u5f15\u503c&#xff0c;\u5b83\u7528\u4e8e\u6807\u8bc6\u4e00\u4e2a\u6253\u5f00\u7684\u7f51\u7edc\u5957\u63a5\u5b57&#xff0c;\u65b9\u4fbf\u540e\u7eed\u5bf9\u8be5\u5957\u63a5\u5b57\u8fdb\u884c\u8bfb\u5199\u3001\u5173\u95ed\u7b49\u64cd\u4f5c\u3002 \u00a0 \u00a0 socket \u63cf\u8ff0\u7b26&#xff08;socket descriptor&#xff09;\u662f\u53ef\u4ee5\u7528\u4e8e\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u7684\u3002<\/p>\n<p>\u00a0<\/p>\n<h4>\u5ba2\u6237\u7aef\u7684 socket \u63cf\u8ff0\u7b26<\/h4>\n<\/p>\n<p>\u5728\u5ba2\u6237\u7aef&#xff0c;\u901a\u5e38\u4f1a\u4f7f\u7528\u4e00\u4e2a socket \u63cf\u8ff0\u7b26\u6765\u5b8c\u6210\u4e0e\u670d\u52a1\u5668\u7684\u8fde\u63a5\u548c\u901a\u4fe1&#xff0c;\u5176\u521b\u5efa\u548c\u4f7f\u7528\u8fc7\u7a0b\u5982\u4e0b&#xff1a;<\/p>\n<h5>1. \u521b\u5efa socket \u63cf\u8ff0\u7b26<\/h5>\n<p>\u5ba2\u6237\u7aef\u9996\u5148\u4f7f\u7528\u00a0socket\u00a0\u51fd\u6570\u521b\u5efa\u4e00\u4e2a socket \u63cf\u8ff0\u7b26&#xff0c;\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u4ee3\u8868\u4e86\u5ba2\u6237\u7aef\u7528\u4e8e\u7f51\u7edc\u901a\u4fe1\u7684\u7aef\u70b9\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b&#xff1a;<\/p>\n<p>#include &lt;sys\/socket.h&gt;<br \/>\n#include &lt;stdio.h&gt;<br \/>\n#include &lt;stdlib.h&gt;<br \/>\n#include &lt;arpa\/inet.h&gt;<br \/>\n#include &lt;unistd.h&gt;<\/p>\n<p>#define PORT 8888<br \/>\n#define SERVER_IP &#034;127.0.0.1&#034;<\/p>\n<p>int main() {<br \/>\n    int client_socket;<br \/>\n    \/\/ \u521b\u5efa\u5ba2\u6237\u7aef socket \u63cf\u8ff0\u7b26<br \/>\n    client_socket &#061; socket(AF_INET, SOCK_STREAM, 0);<br \/>\n    if (client_socket &#061;&#061; -1) {<br \/>\n        perror(&#034;socket creation failed&#034;);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    \/\/ \u540e\u7eed\u4ee3\u7801&#8230;<br \/>\n    close(client_socket);<br \/>\n    return 0;<br \/>\n}<\/p>\n<p>\u8fd9\u91cc\u00a0client_socket\u00a0\u5c31\u662f\u5ba2\u6237\u7aef\u521b\u5efa\u7684 socket \u63cf\u8ff0\u7b26&#xff0c;AF_INET\u00a0\u8868\u793a\u4f7f\u7528 IPv4 \u5730\u5740\u65cf&#xff0c;SOCK_STREAM\u00a0\u8868\u793a\u4f7f\u7528\u9762\u5411\u8fde\u63a5\u7684 TCP \u534f\u8bae\u3002<\/p>\n<h5>2. \u8fde\u63a5\u5230\u670d\u52a1\u5668<\/h5>\n<\/p>\n<p>\u5ba2\u6237\u7aef\u4f7f\u7528\u00a0connect\u00a0\u51fd\u6570&#xff0c;\u901a\u8fc7\u8fd9\u4e2a socket \u63cf\u8ff0\u7b26\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42&#xff1a;<\/p>\n<\/p>\n<p>    struct sockaddr_in server_addr;<br \/>\n    server_addr.sin_family &#061; AF_INET;<br \/>\n    server_addr.sin_port &#061; htons(PORT);<br \/>\n    if (inet_pton(AF_INET, SERVER_IP, &amp;server_addr.sin_addr) &lt;&#061; 0) {<br \/>\n        perror(&#034;Invalid address\/ Address not supported&#034;);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    if (connect(client_socket, (struct sockaddr *)&amp;server_addr, sizeof(server_addr)) &#061;&#061; -1) {<br \/>\n        perror(&#034;connection failed&#034;);<br \/>\n        close(client_socket);<br \/>\n        return -1;<br \/>\n    }<\/p>\n<p>\u6b64\u65f6&#xff0c;\u5ba2\u6237\u7aef\u7684\u00a0client_socket\u00a0\u63cf\u8ff0\u7b26\u5c31\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u4e86\u8fde\u63a5&#xff0c;\u53ef\u4ee5\u7528\u4e8e\u540e\u7eed\u7684\u6570\u636e\u6536\u53d1\u3002<\/p>\n<h5>3. \u6570\u636e\u6536\u53d1\u548c\u5173\u95ed\u8fde\u63a5<\/h5>\n<p>\u5ba2\u6237\u7aef\u53ef\u4ee5\u4f7f\u7528\u00a0send\u00a0\u548c\u00a0recv\u00a0\u51fd\u6570\u901a\u8fc7\u00a0client_socket\u00a0\u63cf\u8ff0\u7b26\u8fdb\u884c\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536&#xff0c;\u901a\u4fe1\u7ed3\u675f\u540e\u4f7f\u7528\u00a0close\u00a0\u51fd\u6570\u5173\u95ed\u8be5\u63cf\u8ff0\u7b26&#xff1a;<\/p>\n<p>    char message[] &#061; &#034;Hello, server!&#034;;<br \/>\n    if (send(client_socket, message, sizeof(message), 0) &#061;&#061; -1) {<br \/>\n        perror(&#034;send failed&#034;);<br \/>\n        close(client_socket);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    char buffer[1024];<br \/>\n    ssize_t bytes_received &#061; recv(client_socket, buffer, sizeof(buffer), 0);<br \/>\n    if (bytes_received &#061;&#061; -1) {<br \/>\n        perror(&#034;recv failed&#034;);<br \/>\n        close(client_socket);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    close(client_socket);<\/p>\n<h4>\u670d\u52a1\u5668\u7aef\u7684 socket \u63cf\u8ff0\u7b26<\/h4>\n<p>\u5728\u670d\u52a1\u5668\u7aef&#xff0c;\u901a\u5e38\u4f1a\u4f7f\u7528\u81f3\u5c11\u4e24\u4e2a socket \u63cf\u8ff0\u7b26\u6765\u5b8c\u6210\u4e0e\u5ba2\u6237\u7aef\u7684\u901a\u4fe1&#xff0c;\u5206\u522b\u662f\u76d1\u542c socket \u63cf\u8ff0\u7b26\u548c\u8fde\u63a5 socket \u63cf\u8ff0\u7b26\u3002<\/p>\n<h5>1. \u76d1\u542c socket \u63cf\u8ff0\u7b26<\/h5>\n<p>\u670d\u52a1\u5668\u9996\u5148\u521b\u5efa\u4e00\u4e2a\u76d1\u542c socket \u63cf\u8ff0\u7b26&#xff0c;\u7528\u4e8e\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42&#xff1a;<\/p>\n<p>#include &lt;sys\/socket.h&gt;<br \/>\n#include &lt;stdio.h&gt;<br \/>\n#include &lt;stdlib.h&gt;<br \/>\n#include &lt;arpa\/inet.h&gt;<br \/>\n#include &lt;unistd.h&gt;<\/p>\n<p>#define PORT 8888<br \/>\n#define BACKLOG 5<\/p>\n<p>int main() {<br \/>\n    int listen_socket;<br \/>\n    \/\/ \u521b\u5efa\u76d1\u542c socket \u63cf\u8ff0\u7b26<br \/>\n    listen_socket &#061; socket(AF_INET, SOCK_STREAM, 0);<br \/>\n    if (listen_socket &#061;&#061; -1) {<br \/>\n        perror(&#034;socket creation failed&#034;);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    struct sockaddr_in server_addr;<br \/>\n    server_addr.sin_family &#061; AF_INET;<br \/>\n    server_addr.sin_addr.s_addr &#061; INADDR_ANY;<br \/>\n    server_addr.sin_port &#061; htons(PORT);<br \/>\n    \/\/ \u7ed1\u5b9a\u5730\u5740\u548c\u7aef\u53e3<br \/>\n    if (bind(listen_socket, (struct sockaddr *)&amp;server_addr, sizeof(server_addr)) &#061;&#061; -1) {<br \/>\n        perror(&#034;bind failed&#034;);<br \/>\n        close(listen_socket);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    \/\/ \u5f00\u59cb\u76d1\u542c<br \/>\n    if (listen(listen_socket, BACKLOG) &#061;&#061; -1) {<br \/>\n        perror(&#034;listen failed&#034;);<br \/>\n        close(listen_socket);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    \/\/ \u540e\u7eed\u4ee3\u7801&#8230;<br \/>\n    close(listen_socket);<br \/>\n    return 0;<br \/>\n}<\/p>\n<p>\u8fd9\u91cc\u7684\u00a0listen_socket\u00a0\u5c31\u662f\u76d1\u542c socket \u63cf\u8ff0\u7b26&#xff0c;\u5b83\u7684\u4f5c\u7528\u662f\u7ed1\u5b9a\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3&#xff0c;\u5e76\u5f00\u59cb\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002BACKLOG\u00a0\u8868\u793a\u8fde\u63a5\u8bf7\u6c42\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6\u3002<\/p>\n<h5>2. \u8fde\u63a5 socket \u63cf\u8ff0\u7b26<\/h5>\n<p>\u5f53\u6709\u5ba2\u6237\u7aef\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42\u65f6&#xff0c;\u670d\u52a1\u5668\u4f7f\u7528\u00a0accept\u00a0\u51fd\u6570\u4ece\u76d1\u542c\u961f\u5217\u4e2d\u53d6\u51fa\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u5e76\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5 socket \u63cf\u8ff0\u7b26\u6765\u4e0e\u8be5\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1&#xff1a;<\/p>\n<\/p>\n<p>    struct sockaddr_in client_addr;<br \/>\n    socklen_t client_addr_len &#061; sizeof(client_addr);<br \/>\n    int client_socket;<br \/>\n    \/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5<br \/>\n    client_socket &#061; accept(listen_socket, (struct sockaddr *)&amp;client_addr, &amp;client_addr_len);<br \/>\n    if (client_socket &#061;&#061; -1) {<br \/>\n        perror(&#034;accept failed&#034;);<br \/>\n        close(listen_socket);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    \/\/ \u540e\u7eed\u4ee3\u7801&#8230;<br \/>\n    close(client_socket);<\/p>\n<p>client_socket\u00a0\u5c31\u662f\u8fde\u63a5 socket \u63cf\u8ff0\u7b26&#xff0c;\u5b83\u4ee3\u8868\u4e86\u670d\u52a1\u5668\u4e0e\u7279\u5b9a\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u8fde\u63a5\u3002\u670d\u52a1\u5668\u53ef\u4ee5\u4f7f\u7528\u00a0send\u00a0\u548c\u00a0recv\u00a0\u51fd\u6570\u901a\u8fc7\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u6570\u636e\u7684\u6536\u53d1\u3002<\/p>\n<h4><\/h4>\n<ul>\n<li>\u5ba2\u6237\u7aef\u7684 socket \u63cf\u8ff0\u7b26&#xff1a;\u7528\u4e8e\u521b\u5efa\u4e0e\u670d\u52a1\u5668\u7684\u8fde\u63a5&#xff0c;\u4ee5\u53ca\u540e\u7eed\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u6570\u636e\u6536\u53d1\u548c\u5173\u95ed\u8fde\u63a5\u64cd\u4f5c\u3002<\/li>\n<li>\u670d\u52a1\u5668\u7684\u76d1\u542c socket \u63cf\u8ff0\u7b26&#xff1a;\u7528\u4e8e\u7ed1\u5b9a\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3&#xff0c;\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n<li>\u670d\u52a1\u5668\u7684\u8fde\u63a5 socket \u63cf\u8ff0\u7b26&#xff1a;\u5f53\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\u5230\u8fbe\u65f6&#xff0c;\u670d\u52a1\u5668\u521b\u5efa\u8be5\u63cf\u8ff0\u7b26\u6765\u4e0e\u7279\u5b9a\u5ba2\u6237\u7aef\u8fdb\u884c\u4e00\u5bf9\u4e00\u7684\u6570\u636e\u901a\u4fe1\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb838\u6b21\uff0c\u70b9\u8d5e25\u6b21\uff0c\u6536\u85cf5\u6b21\u3002\u5728\u670d\u52a1\u5668\u7aef\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528\u81f3\u5c11\u4e24\u4e2a socket \u63cf\u8ff0\u7b26\u6765\u5b8c\u6210\u4e0e\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\uff0c\u5206\u522b\u662f\u76d1\u542c socket \u63cf\u8ff0\u7b26\u548c\u8fde\u63a5 socket \u63cf\u8ff0\u7b26\u3002socket \u63cf\u8ff0\u7b26\uff08socket descriptor\uff09\u662f\u53ef\u4ee5\u7528\u4e8e\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u7684\u3002\u5c31\u662f\u76d1\u542c socket 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