{"id":49484,"date":"2025-07-30T18:32:26","date_gmt":"2025-07-30T10:32:26","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/49484.html"},"modified":"2025-07-30T18:32:26","modified_gmt":"2025-07-30T10:32:26","slug":"day33%e9%9b%b6%e5%9f%ba%e7%a1%80%e5%ad%a6%e5%b5%8c%e5%85%a5%e5%bc%8f%e4%b9%8b%e7%bd%91%e7%bb%9c-tcp%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/49484.html","title":{"rendered":"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668"},"content":{"rendered":"<h2>\u4e00\u3001\u670d\u52a1\u5668<\/h2>\n<h4>1.\u670d\u52a1\u5668\u5206\u7c7b<\/h4>\n<ul>\n<li>\u5355\u5faa\u73af\u670d\u52a1\u5668&#xff1a;\u53ea\u80fd\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef\u4efb\u52a1\u7684\u670d\u52a1\u5668<\/li>\n<li>\u5e76\u53d1\u670d\u52a1\u5668&#xff1a;\u53ef\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u4efb\u52a1\u7684\u670d\u52a1\u5668<\/li>\n<\/ul>\n<h2>\u4e8c\u3001TCP\u5e76\u53d1\u670d\u52a1\u5668\u7684\u6784\u5efa<\/h2>\n<p>1.\u5982\u4f55\u6784\u5efa&#xff1f;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"442\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103218-6889f4b2a9b75.png\" width=\"1907\" \/><\/p>\n<p>&#xff08;1&#xff09;\u591a\u8fdb\u7a0b&#xff08;\u6bcf\u4e00\u6b21\u521b\u5efa\u90fd\u975e\u5e38\u8017\u65f6\u8017\u7a7a\u95f4&#xff0c;\u4f46\u662f\u5b89\u5168&#xff09;<\/p>\n<p>#include &#034;head.h&#034;<br \/>\nint init_tcp(const char *ip, unsigned short port)<br \/>\n{<br \/>\n    int sockfd &#061; socket(AF_INET, SOCK_STREAM, 0);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;socket fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    struct sockaddr_in seraddr;<br \/>\n    seraddr.sin_family &#061; AF_INET;<br \/>\n    seraddr.sin_port &#061; htons(port);<br \/>\n    seraddr.sin_addr.s_addr &#061; inet_addr(ip);<\/p>\n<p>    int ret &#061; bind(sockfd, (struct sockaddr *)&amp;seraddr, sizeof(seraddr));<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;bind fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    ret &#061; listen(sockfd, 100);<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;lisen fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    return sockfd;<br \/>\n}<br \/>\nvoid do_wait(int signo)<br \/>\n{<br \/>\n    wait(NULL);<br \/>\n}<br \/>\nint main(int argc, char const *argv[])<br \/>\n{<br \/>\n    int sockfd &#061; init_tcp(&#034;192.168.1.138&#034;, 50000);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        return 1;<br \/>\n    }<br \/>\n    signal(SIGCHLD, do_wait);<br \/>\n    char buf[1024] &#061; {0};<br \/>\n    struct sockaddr_in cliaddr;<br \/>\n    int clilen &#061; sizeof(cliaddr);<br \/>\n    while (1)<br \/>\n    {<br \/>\n        int connfd &#061; accept(sockfd, (struct sockaddr *)&amp;cliaddr, &amp;clilen);<br \/>\n        if (connfd &lt; 0)<br \/>\n        {<br \/>\n            perror(&#034;connect fail&#034;);<br \/>\n            return 1;<br \/>\n        }<br \/>\n        pid_t pid &#061; fork();<br \/>\n        if (pid &gt; 0)<br \/>\n        {<br \/>\n        }<br \/>\n        else if (0 &#061;&#061; pid)<br \/>\n        {<br \/>\n            while (1)<br \/>\n            {<\/p>\n<p>                memset(buf, 0, sizeof(buf));<br \/>\n                ssize_t size &#061; recv(connfd, buf, sizeof(buf), 0);<br \/>\n                if (size &lt; 0)<br \/>\n                {<br \/>\n                    perror(&#034;recv fail&#034;);<br \/>\n                    break;<br \/>\n                }<br \/>\n                else if (0 &#061;&#061; size)<br \/>\n                {<br \/>\n                    printf(&#034;client connet offline&#034;);<br \/>\n                    break;<br \/>\n                }<br \/>\n                printf(&#034;[%s] [%d]  : %s\\\\n&#034;, inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port), buf);<br \/>\n                strcat(buf, &#034;&#8212;&#8212;ok&#034;);<br \/>\n                size &#061; send(connfd, buf, sizeof(buf), 0);<br \/>\n                if (size &lt; 0)<br \/>\n                {<br \/>\n                    perror(&#034;fail send&#034;);<br \/>\n                    break;<br \/>\n                }<br \/>\n            }<br \/>\n            close(connfd);<br \/>\n            exit(1);<br \/>\n        }<br \/>\n        else<br \/>\n        {<br \/>\n            perror(&#034;fork fail&#034;);<br \/>\n            return 1;<br \/>\n        }<br \/>\n    }<\/p>\n<p>    close(sockfd);<\/p>\n<p>    return 0;<br \/>\n}<\/p>\n<p>&#xff08;2&#xff09;\u591a\u7ebf\u7a0b&#xff08;\u5e76\u53d1\u7a0b\u5ea6\u9ad8\u3001\u4e0d\u592a\u5b89\u5168&#xff09;<\/p>\n<p>#include &#034;head.h&#034;<br \/>\nint init_tcp(const char *ip, unsigned short port)<br \/>\n{<br \/>\n    int sockfd &#061; socket(AF_INET, SOCK_STREAM, 0);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;socket fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    struct sockaddr_in seraddr;<br \/>\n    seraddr.sin_family &#061; AF_INET;<br \/>\n    seraddr.sin_port &#061; htons(port);<br \/>\n    seraddr.sin_addr.s_addr &#061; inet_addr(ip);<\/p>\n<p>    int ret &#061; bind(sockfd, (struct sockaddr *)&amp;seraddr, sizeof(seraddr));<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;bind fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    ret &#061; listen(sockfd, 100);<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;lisen fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    return sockfd;<br \/>\n}<br \/>\ntypedef struct<br \/>\n{<br \/>\n    int connfd;<br \/>\n    struct sockaddr_in cliaddr;<br \/>\n} XIN;<\/p>\n<p>void do_thurance(void *arg)<br \/>\n{<br \/>\n    XIN xi &#061; *(XIN *)arg;<br \/>\n    char buf[1024] &#061; {0};<br \/>\n    while (1)<br \/>\n    {<br \/>\n        memset(buf, 0, sizeof(buf));<br \/>\n        ssize_t size &#061; recv(xi.connfd, buf, sizeof(buf), 0);<br \/>\n        if (size &lt; 0)<br \/>\n        {<br \/>\n            perror(&#034;recv fail&#034;);<br \/>\n            break;<br \/>\n        }<br \/>\n        else if (0 &#061;&#061; size)<br \/>\n        {<br \/>\n            printf(&#034;client connet offline&#034;);<br \/>\n            break;<br \/>\n        }<br \/>\n        printf(&#034;[%s] [%d]  : %s\\\\n&#034;, inet_ntoa(xi.cliaddr.sin_addr), ntohs(xi.cliaddr.sin_port), buf);<br \/>\n        strcat(buf, &#034;&#8212;&#8212;ok&#034;);<br \/>\n        size &#061; send(xi.connfd, buf, sizeof(buf), 0);<br \/>\n        if (size &lt; 0)<br \/>\n        {<br \/>\n            perror(&#034;fail send&#034;);<br \/>\n            break;<br \/>\n        }<br \/>\n    }<br \/>\n    close(xi.connfd);<br \/>\n    pthread_exit(NULL);<br \/>\n}<\/p>\n<p>int main(int argc, char const *argv[])<br \/>\n{<br \/>\n    int sockfd &#061; init_tcp(&#034;192.168.1.138&#034;, 50000);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        return 1;<br \/>\n    }<br \/>\n    char buf[1024] &#061; {0};<br \/>\n    pthread_t tid;<br \/>\n    struct sockaddr_in cliaddr;<br \/>\n    int clilen &#061; sizeof(cliaddr);<br \/>\n    while (1)<br \/>\n    {<br \/>\n        int connfd &#061; accept(sockfd, (struct sockaddr *)&amp;cliaddr, &amp;clilen);<br \/>\n        if (connfd &lt; 0)<br \/>\n        {<br \/>\n            perror(&#034;connect fail&#034;);<br \/>\n            return 1;<br \/>\n        }<br \/>\n        printf(&#034;client getline\\\\n&#034;);<br \/>\n        XIN xi;<br \/>\n        xi.connfd &#061; connfd;<br \/>\n        xi.cliaddr &#061; cliaddr;<br \/>\n        pthread_create(&amp;tid, NULL, do_thurance, &amp;xi);<br \/>\n        pthread_detach(tid);                    \/\/\u8bbe\u7f6e\u5206\u79bb\u5c5e\u6027&#xff0c;\u7ebf\u7a0b\u7ed3\u675f&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u4f1a\u56de\u6536&#xff1b;<br \/>\n    }<br \/>\n    close(sockfd);<\/p>\n<p>    return 0;<br \/>\n}<\/p>\n<p>&#xff08;3&#xff09;\u7ebf\u7a0b\u6c60<\/p>\n<ul>\n<li>\u4e3b\u8981\u89e3\u51b3&#xff1a;\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d&#xff0c;\u7ebf\u7a0b\u88ab\u53cd\u590d\u521b\u5efa\u548c\u9500\u6bc1\u5e26\u6765\u7684\u8017\u65f6\u95ee\u9898&#xff1b;<\/li>\n<\/ul>\n<p>&#xff08;4&#xff09;IO\u591a\u8def\u590d\u7528<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u7406\u89e3&#xff1a;\u4e0d\u521b\u5efa\u8fdb\u7a0b\u548c\u7ebf\u7a0b\u7684\u60c5\u51b5\u4e0b&#xff0c;\u5bf9\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u76d1\u6d4b\u590d\u7528\u4e00\u4e2a\u8fdb\u7a0b&#xff1b;<\/p>\n<h2>\u4e8c\u3001IO\u591a\u8def\u590d\u7528<\/h2>\n<h4>1.\u963b\u585eIO\u65b9\u5f0f&#xff1a;<\/h4>\n<p>&#xff08;1&#xff09;\u591a\u4e2aIO\u4e4b\u95f4\u662f\u540c\u6b65\u5173\u7cfb&#xff1b;<\/p>\n<p>&#xff08;2&#xff09;\u591a\u4e2aIO\u4e4b\u95f4\u76f8\u4e92\u5f71\u54cd&#xff1b;<\/p>\n<h4>2.IO\u591a\u8def\u590d\u7528<\/h4>\n<h5>&#xff08;1&#xff09;\u6b65\u9aa4<\/h5>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 1&#xff09;\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408&#xff08;\u6570\u7ec4\u3001\u94fe\u8868\u3001\u6811\u5f62\u7ed3\u6784&#8230;&#8230;.&#xff09;&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 2&#xff09;\u6dfb\u52a0\u5173\u6ce8\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5e26\u96c6\u5408\u4e2d&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 3&#xff09;\u901a\u8fc7\u51fd\u6570\u63a5\u53e3&#xff0c;\u628a\u96c6\u5408\u4f20\u9012\u7ed9\u5185\u6838&#xff0c;\u5e76\u5f00\u59cb\u68c0\u6d4bIO\u4e8b\u4ef6&#xff08;\u8f93\u5165\u8f93\u51fa\u3001\u8bfb\u5199\u4e8b\u4ef6&#xff09;&#xff1b;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a04&#xff09;\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u4e8b\u4ef6\u65f6&#xff0c;\u901a\u8fc7\u76f8\u5173\u51fd\u6570\u8fd4\u56de&#xff0c;\u505a\u5177\u4f53\u7684\u76f8\u5173\u64cd\u4f5c&#xff1b;<\/p>\n<h5>&#xff08;2&#xff09;select<\/h5>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 1&#xff09;\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868&#xff1a;fd_set<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 2&#xff09;\u6e05\u695a\u96c6\u5408\u8868<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0void FD_CLR(int fd, fd_set *set);\/\/\u628afd\u6e05\u6389<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u00a0int \u00a0FD_ISSET(int fd, fd_set *set);\/\/\u67e5\u770bfd\u5728\u8fd9\u4e2a\u8868\u4e2d\u6709\u6ca1\u6709<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0void FD_SET(int fd, fd_set *set);\/\/\u628afd\u653e\u8fdb\u96c6\u5408\u8868\u4e2d<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0void FD_ZERO(fd_set *set);\/\/\u628a\u96c6\u5408\u8868\u6574\u4f53\u6e05\u7a7a<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 3&#xff09;\u628a\u6587\u4ef6\u63cf\u8ff0\u7b26\u52a0\u5165\u5230\u96c6\u5408\u8868\u4e2d<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 4&#xff09;select&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0int select(int nfds, fd_set *readfds, fd_set *writefds,<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 fd_set *exceptfds, struct timeval *timeout);<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u529f\u80fd&#xff1a;\u901a\u77e5\u5185\u6838\u68c0\u6d4b\u7684\u96c6\u5408\u8868\u5e76\u5f00\u59cb\u68c0\u6d4b<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u53c2\u6570&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 nfds&#xff1a;\u5173\u6ce8\u7684\u6700\u5927\u63cf\u8ff0\u7b26&#043;1<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 readfds&#xff1a;\u5173\u6ce8\u7684\u8bfb\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0writefds&#xff1a;\u5173\u6ce8\u7684\u5199\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exceptfds&#xff1a;\u5176\u4ed6\u4e8b\u4ef6<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0timeout:\u8d85\u65f6\u4e8b\u4ef6\u7684\u5730\u5740&#xff1b;\u8bbe\u7f6e\u4e00\u4e2a\u65f6\u95f4\u7ed3\u70b9&#xff0c;\u5982\u679c\u90fd\u6ca1\u6709\u4e8b\u4ef6\u6765&#xff0c;\u5c31\u76f4\u63a5\u8fd4\u56de&#xff1b;NULL&#xff1a;\u4e0d\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u8fd4\u56de\u503c&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6210\u529f&#xff1a;\u8fd4\u56de\u5230\u8fbe\u4e8b\u4ef6\u7684\u4e2a\u6570<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5931\u8d25&#xff1a;-1<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8d85\u65f6\u65f6\u95f4\u5230\u8fbe\u6ca1\u6709\u4e8b\u4ef6\u65f6&#xff1a;0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"228\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103219-6889f4b33a6e0.png\" width=\"200\" \/>\u4f4d\u56fe\u5728\u5185\u6838\u4e2d&#xff0c;\u4fdd\u6301\u6700\u5c0f\u672a\u88ab\u4f7f\u7528\u539f\u5219<\/p>\n<p>#include &#034;head.h&#034;<br \/>\nint init_tcp(const char *ip, unsigned short port)<br \/>\n{<br \/>\n    int sockfd &#061; socket(AF_INET, SOCK_STREAM, 0);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;socket fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    struct sockaddr_in seraddr;<br \/>\n    seraddr.sin_family &#061; AF_INET;<br \/>\n    seraddr.sin_port &#061; htons(port);<br \/>\n    seraddr.sin_addr.s_addr &#061; inet_addr(ip);<\/p>\n<p>    int ret &#061; bind(sockfd, (struct sockaddr *)&amp;seraddr, sizeof(seraddr));<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;bind fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    ret &#061; listen(sockfd, 100);<br \/>\n    if (ret &lt; 0)<br \/>\n    {<br \/>\n        perror(&#034;lisen fail&#034;);<br \/>\n        return 1;<br \/>\n    }<br \/>\n    return sockfd;<br \/>\n}<br \/>\nint main(int argc, char const *argv[])<br \/>\n{<br \/>\n    int sockfd &#061; init_tcp(&#034;192.168.1.138&#034;, 50002);<br \/>\n    if (sockfd &lt; 0)<br \/>\n    {<br \/>\n        return 1;<br \/>\n    }<br \/>\n    struct sockaddr_in cliaddr;<br \/>\n    int clilen &#061; sizeof(cliaddr);<br \/>\n    int maxs;<br \/>\n    fd_set rdfds;<br \/>\n    fd_set tmprdfds;<br \/>\n    FD_ZERO(&amp;rdfds);<br \/>\n    FD_SET(sockfd, &amp;rdfds);<br \/>\n    int i &#061; 0;<br \/>\n    maxs &#061; sockfd;<br \/>\n    char buf[1024]&#061;{0};<br \/>\n    while (1)<br \/>\n    {<br \/>\n        tmprdfds &#061; rdfds;<br \/>\n        int cnt &#061; select(maxs &#043; 1, &amp;tmprdfds, NULL, NULL, NULL);<br \/>\n        if (cnt &lt; 0)<br \/>\n        {<br \/>\n            perror(&#034;fail select&#034;);<br \/>\n            return 1;<br \/>\n        }<br \/>\n        if (FD_ISSET(sockfd, &amp;tmprdfds))<br \/>\n        {<br \/>\n            int connfd &#061; accept(sockfd,(struct sockaddr*)&amp;cliaddr, &amp;clilen);<br \/>\n            if (connfd &lt; 0)<br \/>\n            {<br \/>\n                perror(&#034;fail accept&#034;);<br \/>\n                return 1;<br \/>\n            }<br \/>\n            FD_SET(connfd, &amp;rdfds);<br \/>\n            maxs &#061; maxs &gt; connfd ? maxs : connfd;<br \/>\n        }<br \/>\n        \/\/ for(i&#061;sockfd;i&lt;maxs&#043;1;&#043;&#043;i)<br \/>\n        \/\/ {<br \/>\n        \/\/     printf(&#034;%d\\\\n&#034;,i);<br \/>\n        \/\/ }<br \/>\n        \/\/ sleep(3);<br \/>\n        for (i &#061; sockfd &#043; 1; i &lt; maxs &#043; 1; &#043;&#043;i)<br \/>\n        {<br \/>\n            if (FD_ISSET(i, &amp;tmprdfds))<br \/>\n            {<br \/>\n                memset(buf, 0, sizeof(buf));<br \/>\n                ssize_t size &#061; recv(i, buf, sizeof(buf), 0);<br \/>\n                if (size &lt; 0)<br \/>\n                {<br \/>\n                    perror(&#034;recv fail&#034;);<br \/>\n                    continue;<br \/>\n                }<br \/>\n                if(0&#061;&#061;size)<br \/>\n                {<br \/>\n                    printf(&#034;client offlink\\\\n&#034;);<br \/>\n                    return 1;<br \/>\n                }<br \/>\n                printf(&#034;[%s] [%d]  : %s\\\\n&#034;, inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port), buf);<br \/>\n                strcat(buf, &#034;&#8212;&#8212;ok&#034;);<br \/>\n                size &#061; send(i, buf, sizeof(buf), 0);<br \/>\n                if (size &lt; 0)<br \/>\n                {<br \/>\n                    perror(&#034;fail send&#034;);<br \/>\n                    continue;<br \/>\n                }<br \/>\n            }<br \/>\n        }<br \/>\n    }<\/p>\n<p>    close(sockfd);<\/p>\n<p>    return 0;<br \/>\n}<\/p>\n<h5>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7f3a\u9677&#xff1a;<\/h5>\n<ul>\n<li>\u9650\u5236\u4e86\u6700\u591a\u53ea\u80fd\u68c0\u6d4b1024\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff08;\u5e95\u5c42\u4f7f\u7528\u6570\u7ec4\u7684\u673a\u5236\u50a8\u5b58&#xff09;&#xff1b;<\/li>\n<li>\u5728\u5e94\u7528\u5c42\u6bcf\u6b21\u9700\u8981\u904d\u5386\u624d\u53ef\u627e\u5230\u5230\u8fbe\u7684\u4e8b\u4ef6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u6548\u7387\u4e0d\u9ad8&#xff0c;\u8fd8\u8017\u65f6&#xff1b;<\/li>\n<li>\u96c6\u5408\u8868\u5b58\u5728\u4e8e\u5e94\u7528\u5c42&#xff0c;\u5185\u6838\u5b58\u5728\u5e94\u7528\u5c42\u548c\u5185\u6838\u5c42\u7684\u6570\u636e\u8868\u7684\u53cd\u590d\u62f7\u8d1d&#xff0c;\u8017\u65f6&#xff1b;<\/li>\n<li>select\u53ea\u80fd\u5de5\u4f5c\u5728\u6c34\u5e73\u89e6\u53d1\u6a21\u5f0f&#xff08;\u4f4e\u901f\u6a21\u5f0f&#xff09;&#xff0c;\u4e0d\u80fd\u5de5\u4f5c\u5728\u8fb9\u6cbf\u89e6\u53d1\u6a21\u5f0f&#xff08;\u9ad8\u901f\u6a21\u5f0f&#xff09;&#xff1b;<\/li>\n<\/ul>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u8fb9\u6cbf\u89e6\u53d1&#xff1a;\u6570\u636e\u4ece\u65e0\u53d8\u6709&#xff0c;\u4ece\u4f4e\u7535\u5e73\u5230\u9ad8\u7535\u5e73&#xff0c;\u89e6\u53d1\u4e00\u6b21&#xff0c;\u79f0\u8bfb\u6570\u636e\u7684\u4e0a\u5347\u6cbf\u89e6\u53d1&#xff1b;<\/p>\n<p>\u6570\u636e\u4e00\u6b21\u6536\u4e0d\u5b8c&#xff0c;\u4f46\u662f\u4e0b\u4e00\u6b21\u7ee7\u7eed\u8bfb&#xff0c;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"286\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103219-6889f4b376319.png\" width=\"2106\" \/><\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u6c34\u5e73\u89e6\u53d1&#xff1a;\u6570\u636e\u4ece\u65e0\u5230\u6709&#xff0c;\u5148\u89e6\u53d1\u4e00\u6b21\u8bfb&#xff0c;\u6ca1\u8bfb\u5b8c&#xff0c;\u518d\u89e6\u53d1\u8bfb&#xff0c;\u4e00\u76f4\u5230\u8bfb\u5b8c\u4e86&#xff0c;\u624d\u4e0d\u89e6\u53d1&#xff1b;\u4f18\u52bf\u5728\u53cd\u590d\u628a\u6570\u636e\u8bfb\u5b8c&#xff1b;\u7f3a\u70b9&#xff1a;\u8017\u65f6&#xff0c;\u4f4e\u4fd7\u6a21\u5f0f<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"307\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103219-6889f4b3dbee8.png\" width=\"2094\" \/>\u00a0\u00a0 \u00a0\u00a0<\/p>\n<h5>&#xff08;3&#xff09;poll<\/h5>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 1&#xff09;\u89e3\u51b3\u7684\u95ee\u9898&#xff1a;\u68c0\u6d4b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e2a\u6570\u4e0d\u53d71024\u9650\u5236&#xff1b;\u5e95\u5c42\u5bf9\u4e8e\u96c6\u5408\u8868\u7684\u65b9\u5f0f\u6539\u53d8&#xff0c;\u53d8\u6210\u4e86<span style=\"color:#fe2c24\">\u94fe\u8868<\/span>&#xff0c;\u65f6\u95f4\u590d\u6742\u5ea6O&#xff08;n&#xff09;&#xff0c;\u5176\u4ed6\u95ee\u9898\u672a\u88ab\u6539\u5584&#xff0c;\u4ecd\u7136\u9700\u8981\u53cd\u590d\u62f7\u8d1d\u3001\u904d\u5386\u3001\u53ea\u53ef\u5de5\u4f5c\u5728\u6c34\u5e73\u89e6\u53d1\u6a21\u5f0f&#xff1b;<\/p>\n<h5>&#xff08;4&#xff09;epoll<\/h5>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 1&#xff09;\u89e3\u51b3\u7684\u95ee\u9898&#xff1a;\u68c0\u6d4b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f<span style=\"color:#fe2c24\">\u6811\u5f62\u7ed3\u6784<\/span>&#xff1b;\u65f6\u95f4\u590d\u6742\u5ea6\u662fO&#xff08;log&#xff08;n&#xff09;\u3010\u7ea2\u9ed1\u6811\u3011&#xff0c;\u4e5f\u4e0d\u53d71024\u9650\u5236&#xff1b;\u5c06\u68c0\u6d4b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u521b\u5efa\u5728\u5185\u6838&#xff0c;<span style=\"color:#fe2c24\">\u89e3\u51b3\u4e86\u5185\u6838\u548c\u7528\u6237\u5c42\u7684\u6570\u636e\u62f7\u8d1d<\/span>&#xff1b;\u76f4\u63a5\u8fd4\u56de\u5230\u8fbe\u4e8b\u4ef6\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408&#xff0c;<span style=\"color:#fe2c24\">\u4e0d\u9700\u8981\u904d\u5386\u5bfb\u627e<\/span>&#xff1b;epoll\u53ef\u4ee5<span style=\"color:#fe2c24\">\u5de5\u4f5c\u5728\u6c34\u5e73\u89e6\u6478\u5f0f&#xff0c;\u4e5f\u53ef\u5de5\u4f5c\u5728\u8fb9\u6cbf\u89e6\u53d1\u6a21\u5f0f<\/span>&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 2&#xff09;\u6b65\u9aa4<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span style=\"background-color:#fbd4d0\">\u00a0 a&#xff09;\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868&#xff1b;<\/span><\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int epoll_create(int size);<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u529f\u80fd&#xff1a;\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868\u5230\u5185\u6838<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u53c2\u6570&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 size&#xff1a;\u6700\u591a\u76d1\u6d4b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u4e2a\u6570<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fd4\u56de\u503c&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6210\u529f\u8fd4\u56de\u975e\u8d1f\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff0c;\u4ee3\u8868\u4e86\u5185\u6838\u7684\u96c6\u5408&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5931\u8d25\u8fd4\u56de-1<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span style=\"background-color:#fbd4d0\"> \u00a0 b&#xff09;\u6dfb\u52a0\u5173\u6ce8\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5230\u96c6\u5408&#xff1b;<\/span><\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u529f\u80fd&#xff1a;\u5bf9\u6587\u4ef6\u63cf\u8ff0\u7b26\u8fdb\u884c\u64cd\u4f5c&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u53c2\u6570&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 epfd&#xff1a;\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 op&#xff1a;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EPOLL_CTL_ADD\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u65b0\u589e\u4e8b\u4ef6<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 EPOLL_CTL_MOD\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u4fee\u6539\u4e8b\u4ef6\u00a0<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 EPOLL_CTL_DEL\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u5220\u9664\u4e8b\u4ef6<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fd&#xff1a;\u8981\u64cd\u4f5c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u00a0<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0events&#xff1a;\u4e8b\u4ef6\u76f8\u5173\u7ed3\u6784\u4f53<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EPOLLIN\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u8bfb\u4e8b\u4ef6<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0EPOLLOUT\u00a0\u00a0 \u00a0\u5199\u4e8b\u4ef6\u00a0\u00a0<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0EPOLLET\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u8fb9\u6cbf\u89e6\u53d1\u00a0\u00a0 \u00a0<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LT\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u6c34\u5e73\u89e6\u53d1<\/p>\n<p><span style=\"color:#e6b223\">typedef union epoll_data {<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 void \u00a0 \u00a0 \u00a0 \u00a0*ptr;<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 int \u00a0 \u00a0 \u00a0 \u00a0 \u00a0fd;<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 uint32_t \u00a0 \u00a0 u32;<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 uint64_t \u00a0 \u00a0 u64;<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} epoll_data_t;<\/span><\/p>\n<p><span style=\"color:#e6b223\">\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0struct epoll_event {<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 uint32_t \u00a0 \u00a0 events; \u00a0 \u00a0 \u00a0\/* Epoll events *\/<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0 epoll_data_t data; \u00a0 \u00a0 \u00a0 \u00a0\/* User data variable *\/<br \/>\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0};<\/span><\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fd4\u56de\u503c&#xff1a;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6210\u529f\u8fd4\u56de0&#xff1b;<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5931\u8d25\u8fd4\u56de-1&#xff1b;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span style=\"color:#fbd4d0\">\u00a0\u00a0\u00a0\u00a0<\/span><span style=\"color:#0d0016\"><span style=\"background-color:#fbd4d0\">c&#xff09;epoll\u901a\u77e5\u5185\u6838\u5f00\u59cb\u68c0\u6d4b&#xff1b;<\/span><\/span><\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<br \/>\n\u00a0\u00a0 \u00a0 \u00a0int epoll_wait(int epfd, struct epoll_event *events,<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int maxevents, int timeout);<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u529f\u80fd:\u76d1\u542c\u4e8b\u4ef6\u8868\u4e2d\u7684\u4e8b\u4ef6,\u5e76\u5c06\u4ea7\u751f\u7684\u4e8b\u4ef6\u5b58\u653e\u5230\u7ed3\u6784\u4f53\u6570\u7ec4\u4e2d<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u53c2\u6570:<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 epfd:\u4e8b\u4ef6\u8868\u6587\u4ef6\u63cf\u8ff0\u7b26<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0events:\u5b58\u653e\u7ed3\u679c\u4e8b\u4ef6\u7ed3\u6784\u4f53\u6570\u7ec4\u7a7a\u95f4\u9996\u5730\u5740\u00a0<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0maxevents:\u6700\u591a\u5b58\u653e\u4e8b\u4ef6\u4e2a\u6570<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0timeout:\u8d85\u65f6\u65f6\u95f4<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0-1:\u963b\u585e\u7b49\u5f85\u76f4\u5230\u6709\u4e8b\u4ef6\u53d1\u751f\u00a0<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u8fd4\u56de\u503c:<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6210\u529f\u8fd4\u56de\u4ea7\u751f\u4e8b\u4ef6\u4e2a\u6570<br \/>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5931\u8d25\u8fd4\u56de-1\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span style=\"color:#fbd4d0\"><span style=\"background-color:#fbd4d0\">\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><span style=\"color:#0d0016\"><span style=\"background-color:#fbd4d0\">d&#xff09;epoll\u8fd4\u56de\u68c0\u6d4b\u5230\u7684\u4e8b\u4ef6\u7ed3\u679c&#xff1b;<\/span><\/span><\/p>\n<\/p>\n<h4>3.\u5728\u6570\u636e\u91cf\u6bd4\u8f83\u5c0f\u7684\u65f6\u5019&#xff0c;select\u7684\u6bd4epoll\u7684\u6027\u80fd\u5dee\u4e0d\u591a&#xff0c;\u751a\u81f3\u66f4\u597d&#xff0c;\u66f4\u5c0f\u7684\u65f6\u5019&#xff0c;\u4f18\u52bf\u4f53\u73b0\u4e0d\u660e\u663e<\/h4>\n<p>\u5bf9\u4e8eIO&#xff1a;\u5982\u679c\u5904\u7406\u7684\u4efb\u52a1\u6709\u8017\u65f6\u4efb\u52a1&#xff0c;\u6b64\u65f6\u5e94\u8be5\u8003\u8651\u589e\u52a0\u8fdb\u7ebf\u7a0b&#xff0c;\u628a\u8017\u65f6\u7684\u4efb\u52a1\u7ed9\u8fdb\u7ebf\u7a0b\u53bb\u505a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1006\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103220-6889f4b462429.png\" width=\"1672\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"317\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103221-6889f4b5d3379.png\" width=\"600\" \/><\/p>\n<p>\u5e76\u53d1\u670d\u52a1\u5668\u7684\u6027\u80fd\u5bf9\u6bd4<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1018\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103222-6889f4b673ab1.png\" width=\"1618\" \/><\/p>\n<\/p>\n<p>\u7ebf\u7a0b\u6c60&#043;epoll\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1123\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103224-6889f4b81e6e5.png\" width=\"2049\" \/><\/p>\n<\/p>\n<p>\u5bf9\u4e8eIO&#xff1a;\u5982\u679c\u5904\u7406\u7684\u4efb\u52a1\u6709\u8017\u65f6\u4efb\u52a1&#xff0c;\u6b64\u65f6\u5e94\u8be5\u8003\u8651\u589e\u52a0\u8fdb\u7ebf\u7a0b&#xff0c;\u628a\u8017\u65f6\u7684\u4efb\u52a1\u7ed9\u8fdb\u7ebf\u7a0b\u53bb\u505a<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb715\u6b21\uff0c\u70b9\u8d5e9\u6b21\uff0c\u6536\u85cf8\u6b21\u3002\/\u628afd\u653e\u8fdb\u96c6\u5408\u8868\u4e2d\u30023\uff09\u901a\u8fc7\u51fd\u6570\u63a5\u53e3\uff0c\u628a\u96c6\u5408\u4f20\u9012\u7ed9\u5185\u6838\uff0c\u5e76\u5f00\u59cb\u68c0\u6d4bIO\u4e8b\u4ef6\uff08\u8f93\u5165\u8f93\u51fa\u3001\u8bfb\u5199\u4e8b\u4ef6\uff09\uff1bwritefds\uff1a\u5173\u6ce8\u7684\u5199\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u3002readfds\uff1a\u5173\u6ce8\u7684\u8bfb\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u30024\uff09\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u4e8b\u4ef6\u65f6\uff0c\u901a\u8fc7\u76f8\u5173\u51fd\u6570\u8fd4\u56de\uff0c\u505a\u5177\u4f53\u7684\u76f8\u5173\u64cd\u4f5c\uff1b1\uff09\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868\uff1afd_set\u3002<\/p>\n","protected":false},"author":2,"featured_media":49476,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[151,78,191],"topic":[],"class_list":["post-49484","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-http","tag-78","tag-191"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \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\/49484.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb715\u6b21\uff0c\u70b9\u8d5e9\u6b21\uff0c\u6536\u85cf8\u6b21\u3002\/\u628afd\u653e\u8fdb\u96c6\u5408\u8868\u4e2d\u30023\uff09\u901a\u8fc7\u51fd\u6570\u63a5\u53e3\uff0c\u628a\u96c6\u5408\u4f20\u9012\u7ed9\u5185\u6838\uff0c\u5e76\u5f00\u59cb\u68c0\u6d4bIO\u4e8b\u4ef6\uff08\u8f93\u5165\u8f93\u51fa\u3001\u8bfb\u5199\u4e8b\u4ef6\uff09\uff1bwritefds\uff1a\u5173\u6ce8\u7684\u5199\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u3002readfds\uff1a\u5173\u6ce8\u7684\u8bfb\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u30024\uff09\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u4e8b\u4ef6\u65f6\uff0c\u901a\u8fc7\u76f8\u5173\u51fd\u6570\u8fd4\u56de\uff0c\u505a\u5177\u4f53\u7684\u76f8\u5173\u64cd\u4f5c\uff1b1\uff09\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868\uff1afd_set\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/49484.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-30T10:32:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103218-6889f4b2a9b75.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=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/49484.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/49484.html\",\"name\":\"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-07-30T10:32:26+00:00\",\"dateModified\":\"2025-07-30T10:32:26+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/49484.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/49484.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/49484.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668\"}]},{\"@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":"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \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\/49484.html","og_locale":"zh_CN","og_type":"article","og_title":"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb715\u6b21\uff0c\u70b9\u8d5e9\u6b21\uff0c\u6536\u85cf8\u6b21\u3002\/\u628afd\u653e\u8fdb\u96c6\u5408\u8868\u4e2d\u30023\uff09\u901a\u8fc7\u51fd\u6570\u63a5\u53e3\uff0c\u628a\u96c6\u5408\u4f20\u9012\u7ed9\u5185\u6838\uff0c\u5e76\u5f00\u59cb\u68c0\u6d4bIO\u4e8b\u4ef6\uff08\u8f93\u5165\u8f93\u51fa\u3001\u8bfb\u5199\u4e8b\u4ef6\uff09\uff1bwritefds\uff1a\u5173\u6ce8\u7684\u5199\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u3002readfds\uff1a\u5173\u6ce8\u7684\u8bfb\u4e8b\u4ef6\u7684\u6211\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u5730\u5740\u30024\uff09\u5f53\u5185\u6838\u68c0\u6d4b\u5230\u4e8b\u4ef6\u65f6\uff0c\u901a\u8fc7\u76f8\u5173\u51fd\u6570\u8fd4\u56de\uff0c\u505a\u5177\u4f53\u7684\u76f8\u5173\u64cd\u4f5c\uff1b1\uff09\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26\u96c6\u5408\u8868\uff1afd_set\u3002","og_url":"https:\/\/www.wsisp.com\/helps\/49484.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-07-30T10:32:26+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730103218-6889f4b2a9b75.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/49484.html","url":"https:\/\/www.wsisp.com\/helps\/49484.html","name":"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-07-30T10:32:26+00:00","dateModified":"2025-07-30T10:32:26+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/49484.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/49484.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/49484.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"day33:\u96f6\u57fa\u7840\u5b66\u5d4c\u5165\u5f0f\u4e4b\u7f51\u7edc\u2014\u2014TCP\u5e76\u53d1\u670d\u52a1\u5668"}]},{"@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\/49484","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=49484"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/49484\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/49476"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=49484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=49484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=49484"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=49484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}