{"id":123001,"date":"2026-11-06T06:17:48","date_gmt":"2026-11-05T22:17:48","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/123001.html"},"modified":"2026-11-06T06:17:48","modified_gmt":"2026-11-05T22:17:48","slug":"linux%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%ef%bc%9a%e5%bd%bb%e5%ba%95%e7%90%86%e8%a7%a3udp%e5%8d%8f%e8%ae%ae%ef%bc%81%e4%bb%8e%e7%ab%af%e5%8f%a3%e5%8f%b7%e3%80%81%e4%ba%94%e5%85%83%e7%bb%84%e3%80%818","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/123001.html","title":{"rendered":"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668"},"content":{"rendered":"<h2>Linux\u7f51\u7edc\u7f16\u7a0b&#xff1a;\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae&#xff01;\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221735-6aed007f84ea2.png\" alt=\"\u5934\u50cf\" \/><\/p>\n<p> <font color=\"#FF4D4F\" size=\"4\"><b>&#x1f525; \u661f\u6052\u968f\u98ce&#xff1a;<\/b><\/font><br \/>\n <font color=\"#FF4D4F\" size=\"4\"><b>\u4e2a\u4eba\u4e3b\u9875<\/b><\/font><\/p>\n<p> <font color=\"#66CCFF\" size=\"3\"><b>\u2744\ufe0f \u4e2a\u4eba\u4e13\u680f&#xff1a;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300aLinux\u7f51\u7edc\u7f16\u7a0b\u4ece0\u52301\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300aC\u8bed\u8a00\u57fa\u7840\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300a\u6570\u636e\u7ed3\u6784\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300a\u673a\u5668\u5b66\u4e60\u5bfc\u8bba\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300a\u524d\u7aef\u57fa\u7840\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300apython\u57fa\u7840\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300aC&#043;&#043;\u4ece\u5165\u95e8\u5230\u5165\u571f\u300b<\/b><\/font><br \/>\n <font color=\"#333333\" size=\"3\"><b>&#xff5c;<\/b><\/font><br \/>\n <font color=\"#66CCFF\" size=\"3\"><b>\u300aLinux\u7684\u5b66\u4e60\u4e4b\u65c5\u300b<\/b><\/font> <\/p>\n<p> <font color=\"#F5B400\" size=\"5\"><b>\u2728 \u6570\u636e\u5373\u77e5\u8bc6&#xff0c;\u538b\u7f29\u5373\u667a\u80fd<\/b><\/font><\/p>\n<hr \/>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>Linux\u7f51\u7edc\u7f16\u7a0b&#xff1a;\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae&#xff01;\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668<\/li>\n<li>\n<ul>\n<li>\u524d\u8a00&#xff1a;\u4e3a\u4ec0\u4e48\u5b66\u4e60Socket\u7f16\u7a0b\u540e&#xff0c;\u8fd8\u8981\u6df1\u5165\u7406\u89e3UDP\u534f\u8bae&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u4e00\u3001\u4f20\u8f93\u5c42\u7a76\u7adf\u8d1f\u8d23\u4ec0\u4e48&#xff1f;<\/li>\n<li>\n<ul>\n<li>1.1 \u56de\u987eTCP\/IP\u4e94\u5c42\u6a21\u578b<\/li>\n<li>1.2 \u4e3a\u4ec0\u4e48\u4ec5\u6709IP\u5730\u5740\u8fd8\u4e0d\u591f&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u4ec0\u4e48\u662f\u7aef\u53e3\u53f7&#xff1f;<\/li>\n<li>\n<ul>\n<li>2.1 \u7aef\u53e3\u53f7\u7684\u5b9a\u4e49<\/li>\n<li>2.2 \u7528\u4e00\u4e2a\u4f8b\u5b50\u7406\u89e3<\/li>\n<li>2.3 \u7aef\u53e3\u53f7\u548c\u8fdb\u7a0bPID\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\u5417&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u4ec0\u4e48\u662f\u901a\u4fe1\u4e94\u5143\u7ec4&#xff1f;<\/li>\n<li>\n<ul>\n<li>3.1 \u4e94\u5143\u7ec4\u5305\u542b\u54ea\u4e9b\u4fe1\u606f&#xff1f;<\/li>\n<li>3.2 \u4e3a\u4ec0\u4e48\u9700\u8981\u534f\u8bae\u53f7&#xff1f;<\/li>\n<li>3.3 \u4e24\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u540c\u4e00\u4e2a\u670d\u52a1\u5668<\/li>\n<li>3.4 Linux\u4e2d\u600e\u6837\u89c2\u5bdf\u901a\u4fe1\u4fe1\u606f&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u7aef\u53e3\u53f7\u7684\u8303\u56f4\u662f\u600e\u6837\u5212\u5206\u7684&#xff1f;<\/li>\n<li>\n<ul>\n<li>4.1 \u4e3a\u4ec0\u4e48\u7aef\u53e3\u53f7\u6700\u5927\u662f65535&#xff1f;<\/li>\n<li>4.2 \u5e38\u89c1\u7684\u57fa\u7840\u5212\u5206<\/li>\n<li>4.3 \u7aef\u53e30\u6709\u4ec0\u4e48\u7279\u6b8a\u542b\u4e49&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u8ba4\u8bc6\u77e5\u540d\u7aef\u53e3\u53f7<\/li>\n<li>\n<ul>\n<li>5.1 \u5982\u4f55\u67e5\u770bLinux\u7cfb\u7edf\u4e2d\u7684\u670d\u52a1\u7aef\u53e3\u8bb0\u5f55&#xff1f;<\/li>\n<li>5.2 \u4e3a\u4ec0\u4e48\u81ea\u5df1\u5199\u670d\u52a1\u5668\u65f6\u901a\u5e38\u907f\u5f00\u77e5\u540d\u7aef\u53e3&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7aef\u53e3\u7ed1\u5b9a\u95ee\u9898<\/li>\n<li>\n<ul>\n<li>6.1 \u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5bind\u591a\u4e2a\u7aef\u53e3\u5417&#xff1f;<\/li>\n<li>6.2 \u4e00\u4e2a\u7aef\u53e3\u80fd\u5426\u88ab\u591a\u4e2a\u8fdb\u7a0bbind&#xff1f;<\/li>\n<li>6.3 \u662f\u5426\u7edd\u5bf9\u4e0d\u5141\u8bb8&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03\u3001\u6b63\u5f0f\u8ba4\u8bc6UDP\u534f\u8bae<\/li>\n<li>\u516b\u3001UDP\u534f\u8bae\u62a5\u5934\u683c\u5f0f<\/li>\n<li>\n<ul>\n<li>8.1 \u6e90\u7aef\u53e3\u53f7<\/li>\n<li>8.2 \u76ee\u7684\u7aef\u53e3\u53f7<\/li>\n<li>8.3 UDP\u957f\u5ea6<\/li>\n<li>8.4 UDP\u6821\u9a8c\u548c<\/li>\n<\/ul>\n<\/li>\n<li>\u4e5d\u3001UDP\u7684\u4e09\u4e2a\u6838\u5fc3\u7279\u70b9<\/li>\n<li>\u5341\u3001\u7279\u70b9\u4e00&#xff1a;UDP\u662f\u65e0\u8fde\u63a5\u7684<\/li>\n<li>\n<ul>\n<li>10.1 \u4ec0\u4e48\u53eb\u65e0\u8fde\u63a5&#xff1f;<\/li>\n<li>10.2 \u4e3a\u4ec0\u4e48sendto\u9700\u8981\u76ee\u7684\u5730\u5740&#xff1f;<\/li>\n<li>10.3 UDP\u670d\u52a1\u5668\u5982\u4f55\u77e5\u9053\u662f\u8c01\u53d1\u9001\u7684&#xff1f;<\/li>\n<li>10.4 UDP\u80fd\u8c03\u7528connect\u5417&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e00\u3001\u7279\u70b9\u4e8c&#xff1a;UDP\u662f\u4e0d\u53ef\u9760\u7684<\/li>\n<li>\n<ul>\n<li>11.1 \u4ec0\u4e48\u53eb\u4e0d\u53ef\u9760&#xff1f;<\/li>\n<li>11.2 UDP\u6ca1\u6709\u786e\u8ba4\u673a\u5236<\/li>\n<li>11.3 UDP\u6ca1\u6709\u81ea\u52a8\u91cd\u4f20\u673a\u5236<\/li>\n<li>11.4 UDP\u4e0d\u4fdd\u8bc1\u5230\u8fbe\u987a\u5e8f<\/li>\n<li>11.5 UDP\u4e0d\u53ef\u9760&#xff0c;\u5e94\u7528\u5c42\u80fd\u5426\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e8c\u3001\u7279\u70b9\u4e09&#xff1a;UDP\u662f\u9762\u5411\u6570\u636e\u62a5\u7684<\/li>\n<li>\n<ul>\n<li>12.1 \u4ec0\u4e48\u53eb\u9762\u5411\u6570\u636e\u62a5&#xff1f;<\/li>\n<li>12.2 \u4e3a\u4ec0\u4e48\u4e00\u6b21\u53d1\u9001100\u5b57\u8282\u4e0d\u80fd\u752810\u6b21recvfrom\u63a5\u6536&#xff1f;<\/li>\n<li>12.3 \u5982\u679c\u5ba2\u6237\u7aef\u53d1\u900110\u6b21\u5462&#xff1f;<\/li>\n<li>12.4 TCP\u4e0eUDP\u5728\u8fd9\u91cc\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e09\u3001UDP\u7f13\u51b2\u533a\u662f\u600e\u6837\u5de5\u4f5c\u7684&#xff1f;<\/li>\n<li>\n<ul>\n<li>13.1 UDP\u6ca1\u6709TCP\u90a3\u6837\u7684\u53ef\u9760\u53d1\u9001\u7f13\u51b2\u673a\u5236<\/li>\n<li>13.2 UDP\u5177\u6709\u63a5\u6536\u7f13\u51b2\u533a<\/li>\n<li>13.3 \u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u4e0d\u53ca\u65f6\u8bfb\u53d6\u600e\u4e48\u529e&#xff1f;<\/li>\n<li>13.4 UDP\u662f\u5426\u4fdd\u8bc1\u6570\u636e\u62a5\u987a\u5e8f&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u56db\u3001\u4e3a\u4ec0\u4e48\u8bf4UDP\u652f\u6301\u5168\u53cc\u5de5&#xff1f;<\/li>\n<li>\n<ul>\n<li>14.1 \u4ec0\u4e48\u662f\u5168\u53cc\u5de5&#xff1f;<\/li>\n<li>14.2 \u4e3a\u4ec0\u4e48UDP\u6ca1\u6709\u8fde\u63a5\u4e5f\u80fd\u5168\u53cc\u5de5&#xff1f;<\/li>\n<li>14.3 \u5168\u53cc\u5de5\u662f\u5426\u8868\u793a\u5e94\u7528\u7a0b\u5e8f\u4e00\u5b9a\u540c\u65f6\u8c03\u7528sendto\u4e0erecvfrom&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e94\u3001UDP\u5355\u6761\u6570\u636e\u62a5\u80fd\u4f20\u8f93\u591a\u5927\u7684\u6570\u636e&#xff1f;<\/li>\n<li>\n<ul>\n<li>15.1 \u4ec5\u8003\u8651UDP\u62a5\u5934<\/li>\n<li>15.2 \u4e3a\u4ec0\u4e48IPv4\u4e0b\u901a\u5e38\u8fd8\u8981\u51cf\u53bbIP\u62a5\u5934&#xff1f;<\/li>\n<li>15.3 \u4e3a\u4ec0\u4e48\u901a\u5e38\u4e0d\u5efa\u8bae\u53d1\u9001\u7279\u522b\u5927\u7684UDP\u6570\u636e\u62a5&#xff1f;<\/li>\n<li>15.4 \u8d85\u8fc7UDP\u5355\u6761\u6570\u636e\u62a5\u9650\u5236\u600e\u4e48\u529e&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u516d\u3001\u6709\u54ea\u4e9b\u57fa\u4e8eUDP\u7684\u5e94\u7528\u5c42\u534f\u8bae&#xff1f;<\/li>\n<li>\n<ul>\n<li>16.1 NFS<\/li>\n<li>16.2 TFTP<\/li>\n<li>16.3 DHCP<\/li>\n<li>16.4 BOOTP<\/li>\n<li>16.5 DNS<\/li>\n<li>16.6 \u81ea\u5b9a\u4e49UDP\u5e94\u7528\u5c42\u534f\u8bae<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e03\u3001\u603b\u7ed3<\/li>\n<\/ul>\n<h3>\u524d\u8a00&#xff1a;\u4e3a\u4ec0\u4e48\u5b66\u4e60Socket\u7f16\u7a0b\u540e&#xff0c;\u8fd8\u8981\u6df1\u5165\u7406\u89e3UDP\u534f\u8bae&#xff1f;<\/h3>\n<p>\u5728\u524d\u9762\u7684Linux\u7f51\u7edc\u7f16\u7a0b\u4e2d&#xff0c;\u6211\u4eec\u5df2\u7ecf\u4f7f\u7528\u8fc7&#xff1a;<\/p>\n<p><span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u7b49\u63a5\u53e3&#xff0c;\u5e76\u7f16\u5199\u8fc7\u7b80\u5355\u7684UDP\u901a\u4fe1\u7a0b\u5e8f\u3002<\/p>\n<p>\u4f8b\u5982&#xff0c;\u5ba2\u6237\u7aef\u53d1\u9001&#xff1a;<\/p>\n<p>hello<\/p>\n<p>\u670d\u52a1\u5668\u63a5\u6536\u540e\u8fd4\u56de&#xff1a;<\/p>\n<p>server echo# hello<\/p>\n<p>\u8fd9\u6837\u7684\u7a0b\u5e8f\u867d\u7136\u80fd\u591f\u6b63\u5e38\u8fd0\u884c&#xff0c;\u4f46\u4ecd\u7136\u5b58\u5728\u51e0\u4e2a\u503c\u5f97\u601d\u8003\u7684\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u4e3a\u4ec0\u4e48UDP\u670d\u52a1\u5668\u9700\u8981\u7ed1\u5b9a\u7aef\u53e3\u53f7&#xff1f;<\/li>\n<li>\u4e3a\u4ec0\u4e48\u4e00\u53f0\u4e3b\u673a\u80fd\u591f\u540c\u65f6\u8fd0\u884c\u591a\u4e2a\u7f51\u7edc\u7a0b\u5e8f&#xff1f;<\/li>\n<li>\u4e3a\u4ec0\u4e48UDP\u4e0d\u9700\u8981\u5efa\u7acb\u8fde\u63a5\u5c31\u80fd\u53d1\u9001\u6d88\u606f&#xff1f;<\/li>\n<li>\u4e3a\u4ec0\u4e48UDP\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u4e00\u5b9a\u5230\u8fbe&#xff1f;<\/li>\n<li>\u4e3a\u4ec0\u4e48UDP\u53d1\u9001\u4e00\u6b21100\u5b57\u8282\u7684\u6570\u636e&#xff0c;\u4e0d\u80fd\u752810\u6b2110\u5b57\u8282\u7684\u63a5\u6536\u64cd\u4f5c\u628a\u5b83\u4f9d\u6b21\u53d6\u51fa\u6765&#xff1f;<\/li>\n<li>\u4e3a\u4ec0\u4e48\u8bf4UDP\u6ca1\u6709TCP\u90a3\u6837\u7684\u53d1\u9001\u7f13\u51b2\u673a\u5236&#xff0c;\u5374\u4ecd\u7136\u53ef\u4ee5\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u4fe1&#xff1f;<\/li>\n<li>UDP\u4e00\u4e2a\u6570\u636e\u62a5\u7a76\u7adf\u80fd\u591f\u4f20\u8f93\u591a\u5c11\u5b57\u8282&#xff1f;<\/li>\n<\/ul>\n<p>\u8981\u7406\u89e3\u8fd9\u4e9b\u95ee\u9898&#xff0c;\u4e0d\u80fd\u53ea\u505c\u7559\u5728Socket API\u7684\u8c03\u7528\u65b9\u6cd5\u4e0a&#xff0c;\u800c\u9700\u8981\u6df1\u5165\u4f20\u8f93\u5c42\u534f\u8bae\u672c\u8eab\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001\u4f20\u8f93\u5c42\u7a76\u7adf\u8d1f\u8d23\u4ec0\u4e48&#xff1f;<\/h2>\n<h3>1.1 \u56de\u987eTCP\/IP\u4e94\u5c42\u6a21\u578b<\/h3>\n<p>\u524d\u9762\u5df2\u7ecf\u5b66\u4e60\u8fc7TCP\/IP\u4e94\u5c42\u6a21\u578b&#xff1a;<\/p>\n<p>\u5e94\u7528\u5c42<br \/>\n   |<br \/>\n   v<br \/>\n\u4f20\u8f93\u5c42<br \/>\n   |<br \/>\n   v<br \/>\n\u7f51\u7edc\u5c42<br \/>\n   |<br \/>\n   v<br \/>\n\u6570\u636e\u94fe\u8def\u5c42<br \/>\n   |<br \/>\n   v<br \/>\n\u7269\u7406\u5c42<\/p>\n<p>\u5176\u4e2d&#xff0c;\u6211\u4eec\u4eca\u5929\u8ba8\u8bba\u7684\u662f&#xff1a;<\/p>\n<p>\u4f20\u8f93\u5c42&#xff08;Transport Layer&#xff09;\u3002<\/p>\n<p>\u4f20\u8f93\u5c42\u7684\u91cd\u8981\u804c\u8d23&#xff0c;\u662f\u4e3a\u4e24\u7aef\u7684\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u7aef\u5230\u7aef\u7684\u6570\u636e\u4f20\u8f93\u670d\u52a1\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e3b\u673aA                              \u4e3b\u673aB<\/p>\n<p>\u804a\u5929\u5ba2\u6237\u7aef                         \u804a\u5929\u670d\u52a1\u5668<br \/>\n    |                                  ^<br \/>\n    v                                  |<br \/>\n   UDP &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&gt; UDP<br \/>\n    |                                  ^<br \/>\n    v                                  |<br \/>\n    IP &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&gt;  IP<\/p>\n<p>\u8fd9\u91cc\u9700\u8981\u533a\u5206\u4e24\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u7f51\u7edc\u5c42\u4e3b\u8981\u5173\u6ce8&#xff1a;<\/p>\n<p>\u6570\u636e\u5982\u4f55\u5230\u8fbe\u76ee\u6807\u4e3b\u673a&#xff1f;<\/p>\n<p>\u800c\u4f20\u8f93\u5c42\u8fd8\u9700\u8981\u5173\u6ce8&#xff1a;<\/p>\n<p>\u6570\u636e\u5e94\u8be5\u4ea4\u7ed9\u76ee\u6807\u4e3b\u673a\u4e2d\u7684\u54ea\u4e2a\u5e94\u7528\u7a0b\u5e8f&#xff1f;<\/p>\n<p>\u56e0\u6b64&#xff0c;\u4f20\u8f93\u5c42\u4e0d\u4ec5\u8981\u89e3\u51b3\u6570\u636e\u4f20\u8f93\u95ee\u9898&#xff0c;\u8fd8\u9700\u8981\u80fd\u591f\u533a\u5206\u4e0d\u540c\u7684\u7f51\u7edc\u5e94\u7528\u3002<\/p>\n<h3>1.2 \u4e3a\u4ec0\u4e48\u4ec5\u6709IP\u5730\u5740\u8fd8\u4e0d\u591f&#xff1f;<\/h3>\n<p>\u5047\u8bbe\u4e00\u53f0Linux\u4e3b\u673a\u7684IP\u5730\u5740\u662f&#xff1a;<\/p>\n<p>172.23.12.14<\/p>\n<p>\u8fd9\u53f0\u4e3b\u673a\u540c\u65f6\u8fd0\u884c&#xff1a;<\/p>\n<p>SSH\u670d\u52a1\u5668<br \/>\nHTTP\u670d\u52a1\u5668<br \/>\nFTP\u670d\u52a1\u5668<\/p>\n<p>\u67d0\u4e2a\u6570\u636e\u5305\u901a\u8fc7\u7f51\u7edc\u5230\u8fbe\u8fd9\u53f0\u4e3b\u673a\u4ee5\u540e&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u9700\u8981\u77e5\u9053&#xff1a;<\/p>\n<p>\u5b83\u5e94\u8be5\u4ea4\u7ed9SSH&#xff1f;<\/p>\n<p>\u8fd8\u662f\u4ea4\u7ed9HTTP&#xff1f;<\/p>\n<p>\u8fd8\u662f\u4ea4\u7ed9FTP&#xff1f;<\/p>\n<p>\u4ec5\u51ed\u76ee\u6807IP\u5730\u5740&#xff0c;\u65e0\u6cd5\u5b8c\u6210\u5e94\u7528\u7a0b\u5e8f\u5c42\u9762\u7684\u533a\u5206\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u9700\u8981\u8fdb\u4e00\u6b65\u5f15\u5165&#xff1a;<\/p>\n<p>\u7aef\u53e3\u53f7&#xff08;Port&#xff09;\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001\u4ec0\u4e48\u662f\u7aef\u53e3\u53f7&#xff1f;<\/h2>\n<h3>2.1 \u7aef\u53e3\u53f7\u7684\u5b9a\u4e49<\/h3>\n<p>\u7aef\u53e3\u53f7\u662f\u4f20\u8f93\u5c42\u7528\u4e8e\u533a\u5206\u4e00\u53f0\u4e3b\u673a\u4e0a\u4e0d\u540c\u7f51\u7edc\u901a\u4fe1\u7aef\u70b9\u7684\u91cd\u8981\u6807\u8bc6\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e3b\u673aIP&#xff1a;172.23.12.14<\/p>\n<p>\u540c\u4e00\u53f0\u4e3b\u673a\u4e0a\u53ef\u4ee5\u6709&#xff1a;<\/p>\n<p>SSH\u670d\u52a1\u5668&#xff1a;TCP 22<\/p>\n<p>HTTP\u670d\u52a1\u5668&#xff1a;TCP 80<\/p>\n<p>FTP\u63a7\u5236\u670d\u52a1\u5668&#xff1a;TCP 21<\/p>\n<p>\u5f53\u4e00\u4e2aTCP\u6570\u636e\u6bb5\u5230\u8fbe\u4e3b\u673a\u65f6&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u6839\u636e\u534f\u8bae\u3001\u76ee\u7684\u5730\u5740\u548c\u7aef\u53e3\u7b49\u4fe1\u606f&#xff0c;\u5c06\u6570\u636e\u4ea4\u7ed9\u9002\u5f53\u7684Socket\u3002<\/p>\n<h3>2.2 \u7528\u4e00\u4e2a\u4f8b\u5b50\u7406\u89e3<\/h3>\n<p>\u5047\u8bbe\u4e00\u53f0\u670d\u52a1\u5668\u540c\u65f6\u63d0\u4f9b\u4e09\u79cd\u670d\u52a1&#xff1a;<\/p>\n<p>\u670d\u52a1\u5668IP&#xff1a;192.168.1.100<\/p>\n<p>\u5bf9\u5e94&#xff1a;<\/p>\n<p>192.168.1.100:22<br \/>\n        |<br \/>\n        v<br \/>\n     SSH\u670d\u52a1<\/p>\n<p>192.168.1.100:80<br \/>\n        |<br \/>\n        v<br \/>\n     HTTP\u670d\u52a1<\/p>\n<p>192.168.1.100:8888<br \/>\n        |<br \/>\n        v<br \/>\n     \u81ea\u5b9a\u4e49\u670d\u52a1<\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<p>192.168.1.100<\/p>\n<p>\u7528\u4e8e\u5b9a\u4f4d\u4e3b\u673a\u3002<\/p>\n<p>\u800c&#xff1a;<\/p>\n<p>22\u300180\u30018888<\/p>\n<p>\u7528\u4e8e\u6807\u8bc6\u4e0d\u540c\u7684\u4f20\u8f93\u5c42\u901a\u4fe1\u7aef\u70b9\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u53ef\u4ee5\u5148\u5efa\u7acb\u4e00\u4e2a\u7b80\u5316\u8ba4\u8bc6&#xff1a;<\/p>\n<p>IP\u5730\u5740\u5e2e\u52a9\u5b9a\u4f4d\u4e3b\u673a&#xff0c;\u7aef\u53e3\u53f7\u5e2e\u52a9\u533a\u5206\u4e3b\u673a\u4e0a\u7684\u7f51\u7edc\u670d\u52a1\u3002<\/p>\n<p>\u4e0d\u8fc7\u5728\u64cd\u4f5c\u7cfb\u7edf\u5185\u90e8&#xff0c;\u5b9e\u9645\u7684\u6570\u636e\u5206\u53d1\u8fd8\u4f1a\u8003\u8651\u4f20\u8f93\u5c42\u534f\u8bae\u3001\u7ed1\u5b9a\u5730\u5740\u3001\u8fde\u63a5\u72b6\u6001\u7b49\u4fe1\u606f&#xff0c;\u5e76\u4e0d\u662f\u53ea\u770b\u7aef\u53e3\u53f7\u4e00\u4e2a\u6570\u5b57\u3002<\/p>\n<h3>2.3 \u7aef\u53e3\u53f7\u548c\u8fdb\u7a0bPID\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\u5417&#xff1f;<\/h3>\n<p>\u4e0d\u662f\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>HTTP\u670d\u52a1\u5668PID&#xff1a;2357<\/p>\n<p>HTTP\u670d\u52a1\u7aef\u53e3&#xff1a;80<\/p>\n<p>\u4e24\u8005\u6ca1\u6709\u76f4\u63a5\u7684\u6570\u503c\u5bf9\u5e94\u5173\u7cfb\u3002<\/p>\n<p>PID\u7531\u64cd\u4f5c\u7cfb\u7edf\u7528\u4e8e\u6807\u8bc6\u8fdb\u7a0b\u3002<\/p>\n<p>\u7aef\u53e3\u53f7\u7528\u4e8e\u7f51\u7edc\u901a\u4fe1\u7aef\u70b9\u7684\u6807\u8bc6\u3002<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>PID \u2260 Port<\/p>\n<p>\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2aSocket&#xff0c;\u751a\u81f3\u7ed1\u5b9a\u591a\u4e2a\u4e0d\u540c\u7aef\u53e3\u3002<\/p>\n<p>\u4e00\u4e2a\u7aef\u53e3\u4e5f\u5e76\u4e0d\u5929\u7136\u7b49\u4e8e\u4e00\u4e2a\u8fdb\u7a0bID\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221735-6aed007fab56f.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u4e09\u3001\u4ec0\u4e48\u662f\u901a\u4fe1\u4e94\u5143\u7ec4&#xff1f;<\/h2>\n<p>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u77e5\u9053&#xff1a;<\/p>\n<p>IP\u5730\u5740<\/p>\n<p>\u7aef\u53e3\u53f7<\/p>\n<p>\u4f46\u4e00\u6b21\u7f51\u7edc\u901a\u4fe1\u4e0d\u4ec5\u6d89\u53ca\u4e00\u65b9\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aefA &#8212;&gt; \u670d\u52a1\u5668<\/p>\n<p>\u9700\u8981\u77e5\u9053&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aefIP<\/p>\n<p>\u5ba2\u6237\u7aef\u7aef\u53e3<\/p>\n<p>\u670d\u52a1\u5668IP<\/p>\n<p>\u670d\u52a1\u5668\u7aef\u53e3<\/p>\n<p>\u540c\u65f6\u8fd8\u9700\u8981\u77e5\u9053\u4f7f\u7528\u4ec0\u4e48\u4f20\u8f93\u5c42\u534f\u8bae\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u4e94\u5143\u7ec4\u63cf\u8ff0\u901a\u4fe1&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         (<\/p>\n<p>         \u6e90IP<\/p>\n<p>         ,<\/p>\n<p>         \u6e90\u7aef\u53e3<\/p>\n<p>         ,<\/p>\n<p>         \u76ee\u7684IP<\/p>\n<p>         ,<\/p>\n<p>         \u76ee\u7684\u7aef\u53e3<\/p>\n<p>         ,<\/p>\n<p>         \u534f\u8bae\u53f7<\/p>\n<p>         )<\/p>\n<p>         (\\\\text{\u6e90IP},\\\\text{\u6e90\u7aef\u53e3},\\\\text{\u76ee\u7684IP},\\\\text{\u76ee\u7684\u7aef\u53e3},\\\\text{\u534f\u8bae\u53f7}) <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 1em;vertical-align: -0.25em\"><\/span><span class=\"mopen\">(<\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u6e90<\/span><span class=\"mord\">IP<\/span><\/span><span class=\"mpunct\">,<\/span><span class=\"mspace\" style=\"margin-right: 0.1667em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u6e90\u7aef\u53e3<\/span><\/span><span class=\"mpunct\">,<\/span><span class=\"mspace\" style=\"margin-right: 0.1667em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u76ee\u7684<\/span><span class=\"mord\">IP<\/span><\/span><span class=\"mpunct\">,<\/span><span class=\"mspace\" style=\"margin-right: 0.1667em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u76ee\u7684\u7aef\u53e3<\/span><\/span><span class=\"mpunct\">,<\/span><span class=\"mspace\" style=\"margin-right: 0.1667em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u534f\u8bae\u53f7<\/span><\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h3>3.1 \u4e94\u5143\u7ec4\u5305\u542b\u54ea\u4e9b\u4fe1\u606f&#xff1f;<\/h3>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u6e90IP&#xff1a;192.168.1.10<\/p>\n<p>\u6e90\u7aef\u53e3&#xff1a;50001<\/p>\n<p>\u76ee\u7684IP&#xff1a;192.168.1.100<\/p>\n<p>\u76ee\u7684\u7aef\u53e3&#xff1a;8888<\/p>\n<p>\u534f\u8bae&#xff1a;UDP<\/p>\n<p>\u53ef\u4ee5\u8868\u793a\u4e3a&#xff1a;<\/p>\n<p>(<br \/>\n    192.168.1.10,<br \/>\n    50001,<br \/>\n    192.168.1.100,<br \/>\n    8888,<br \/>\n    UDP<br \/>\n)<\/p>\n<p>\u5982\u679c\u53e6\u4e00\u53f0\u5ba2\u6237\u7aef\u8fde\u63a5\u540c\u4e00\u4e2a\u670d\u52a1\u5668&#xff1a;<\/p>\n<p>\u6e90IP&#xff1a;192.168.1.11<\/p>\n<p>\u6e90\u7aef\u53e3&#xff1a;50002<\/p>\n<p>\u76ee\u7684IP&#xff1a;192.168.1.100<\/p>\n<p>\u76ee\u7684\u7aef\u53e3&#xff1a;8888<\/p>\n<p>\u534f\u8bae&#xff1a;UDP<\/p>\n<p>\u5b83\u5bf9\u5e94\u53e6\u4e00\u4e2a\u4e94\u5143\u7ec4\u3002<\/p>\n<h3>3.2 \u4e3a\u4ec0\u4e48\u9700\u8981\u534f\u8bae\u53f7&#xff1f;<\/h3>\n<p>\u56e0\u4e3a&#xff1a;<\/p>\n<p>TCP\u7aef\u53e38888<\/p>\n<p>\u548c&#xff1a;<\/p>\n<p>UDP\u7aef\u53e38888<\/p>\n<p>\u5c5e\u4e8e\u4e0d\u540c\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u7a7a\u95f4\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_STREAM<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u521b\u5efaTCP Socket\u3002<\/p>\n<p>\u800c&#xff1a;<\/p>\n<p><span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_DGRAM<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u521b\u5efaUDP Socket\u3002<\/p>\n<p>\u5373\u4f7f\u4e8c\u8005\u4f7f\u7528\u76f8\u540c\u7684\u6570\u5b57\u7aef\u53e3&#xff0c;\u901a\u4fe1\u534f\u8bae\u4ecd\u7136\u4e0d\u540c\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u901a\u4fe1\u4e94\u5143\u7ec4\u9700\u8981\u5305\u542b&#xff1a;<\/p>\n<p>\u534f\u8bae\u53f7<\/p>\n<p>\u5728IP\u534f\u8bae\u4e2d&#xff1a;<\/p>\n<p>TCP\u534f\u8bae\u53f7&#xff1a;6<\/p>\n<p>UDP\u534f\u8bae\u53f7&#xff1a;17<\/p>\n<h3>3.3 \u4e24\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u540c\u4e00\u4e2a\u670d\u52a1\u5668<\/h3>\n<p>Client-A<br \/>\n192.168.1.10:50001<br \/>\n         |<br \/>\n         | UDP<br \/>\n         v<br \/>\nServer<br \/>\n192.168.1.100:8888<br \/>\n         ^<br \/>\n         | UDP<br \/>\n         |<br \/>\nClient-B<br \/>\n192.168.1.11:50002<\/p>\n<p>\u867d\u7136\u4e24\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u7684&#xff1a;<\/p>\n<p>\u76ee\u7684IP<\/p>\n<p>\u76ee\u7684\u7aef\u53e3<\/p>\n<p>\u4f20\u8f93\u5c42\u534f\u8bae<\/p>\n<p>\u90fd\u76f8\u540c&#xff0c;\u4f46\u5b83\u4eec\u7684\u6e90\u5730\u5740\u548c\u6e90\u7aef\u53e3\u4e0d\u540c\u3002<\/p>\n<p>\u56e0\u6b64\u53ef\u4ee5\u7528\u4e0d\u540c\u7684\u4e94\u5143\u7ec4\u63cf\u8ff0\u5bf9\u5e94\u901a\u4fe1\u3002<\/p>\n<h3>3.4 Linux\u4e2d\u600e\u6837\u89c2\u5bdf\u901a\u4fe1\u4fe1\u606f&#xff1f;<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p>ss <span class=\"token parameter variable\">-tun<\/span><\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<p>-t&#xff1a;TCP<\/p>\n<p>-u&#xff1a;UDP<\/p>\n<p>-n&#xff1a;\u4ee5\u6570\u5b57\u5f62\u5f0f\u663e\u793a\u5730\u5740\u548c\u7aef\u53e3<\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">netstat<\/span> <span class=\"token parameter variable\">-n<\/span><\/p>\n<p>\u4e0d\u8fc7\u5728\u73b0\u4ee3Linux\u73af\u5883\u4e2d&#xff0c;ss \u901a\u5e38\u66f4\u65b9\u4fbf&#xff0c;\u4e5f\u66f4\u5e38\u89c1\u3002<\/p>\n<p>\u6ce8\u610f&#xff1a;UDP\u662f\u65e0\u8fde\u63a5\u534f\u8bae&#xff0c;\u56e0\u6b64 ss \u663e\u793a\u7684UDP Socket\u72b6\u6001\u4e0eTCP\u8fde\u63a5\u72b6\u6001\u6709\u6240\u533a\u522b&#xff0c;\u4e0d\u80fd\u673a\u68b0\u5730\u628aUDP\u8f93\u51fa\u7406\u89e3\u4e3aTCP\u90a3\u6837\u7684\u5df2\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221737-6aed0081549b0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u56db\u3001\u7aef\u53e3\u53f7\u7684\u8303\u56f4\u662f\u600e\u6837\u5212\u5206\u7684&#xff1f;<\/h2>\n<h3>4.1 \u4e3a\u4ec0\u4e48\u7aef\u53e3\u53f7\u6700\u5927\u662f65535&#xff1f;<\/h3>\n<p>TCP\u4e0eUDP\u62a5\u5934\u90fd\u4f7f\u7528&#xff1a;<\/p>\n<p>16\u4f4d<\/p>\n<p>\u8868\u793a\u7aef\u53e3\u53f7\u3002<\/p>\n<p>16\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u53ef\u8868\u793a&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         0<\/p>\n<p>         \u223c<\/p>\n<p>          2<\/p>\n<p>          16<\/p>\n<p>         \u2212<\/p>\n<p>         1<\/p>\n<p>         0 \\\\sim 2^{16}-1 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">0<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u223c<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.9474em;vertical-align: -0.0833em\"><\/span><span class=\"mord\"><span class=\"mord\">2<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8641em\"><span class=\"\" style=\"top: -3.113em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">16<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">1<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u56e0\u6b64\u7aef\u53e3\u53f7\u7684\u6570\u503c\u8303\u56f4\u4e3a&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         0<\/p>\n<p>         \u223c<\/p>\n<p>         65535<\/p>\n<p>         0 \\\\sim 65535 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">0<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u223c<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">65535<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h3>4.2 \u5e38\u89c1\u7684\u57fa\u7840\u5212\u5206<\/h3>\n<p>\u5b66\u4e60\u7aef\u53e3\u53f7\u65f6&#xff0c;\u901a\u5e38\u5148\u8fdb\u884c\u4ee5\u4e0b\u5212\u5206&#xff1a;<\/p>\n<table>\n<tr>\u8303\u56f4\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>0&#xff5e;1023<\/td>\n<td>\u77e5\u540d\u7aef\u53e3\u8303\u56f4<\/td>\n<\/tr>\n<tr>\n<td>1024&#xff5e;65535<\/td>\n<td>\u975e\u77e5\u540d\u7aef\u53e3\u8303\u56f4&#xff0c;\u5305\u542b\u6ce8\u518c\u7aef\u53e3\u548c\u52a8\u6001\u7aef\u53e3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u91cc\u9700\u8981\u8bf4\u660e&#xff1a;<\/p>\n<p>\u5c061024&#xff5e;65535\u5168\u90e8\u79f0\u4e3a\u201c\u64cd\u4f5c\u7cfb\u7edf\u52a8\u6001\u5206\u914d\u7684\u7aef\u53e3\u201d&#xff0c;\u662f\u4e00\u79cd\u4fbf\u4e8e\u5165\u95e8\u7406\u89e3\u7684\u7c97\u7565\u8bf4\u6cd5\u3002<\/p>\n<p>\u66f4\u7ec6\u81f4\u7684\u5212\u5206\u662f&#xff1a;<\/p>\n<p>0&#xff5e;1023&#xff1a;\u7cfb\u7edf\u7aef\u53e3\u8303\u56f4<\/p>\n<p>1024&#xff5e;49151&#xff1a;\u6ce8\u518c\u7aef\u53e3\u8303\u56f4<\/p>\n<p>49152&#xff5e;65535&#xff1a;IANA\u52a8\u6001\u6216\u79c1\u6709\u7aef\u53e3\u8303\u56f4<\/p>\n<p>\u6b64\u5916&#xff0c;Linux\u81ea\u52a8\u9009\u62e9\u4e34\u65f6\u7aef\u53e3\u65f6&#xff0c;\u5b9e\u9645\u4f7f\u7528\u7684\u8303\u56f4\u7531\u7cfb\u7edf\u914d\u7f6e\u51b3\u5b9a&#xff0c;\u4e0d\u4e00\u5b9a\u7b49\u4e8e49152&#xff5e;65535\u3002<\/p>\n<p>\u5728Linux\u4e2d\u53ef\u4ee5\u67e5\u770b&#xff1a;<\/p>\n<p><span class=\"token function\">cat<\/span> \/proc\/sys\/net\/ipv4\/ip_local_port_range<\/p>\n<p>\u4f8b\u5982\u53ef\u80fd\u8f93\u51fa&#xff1a;<\/p>\n<p>32768 60999<\/p>\n<p>\u8fd9\u8868\u793a\u5f53\u524d\u7cfb\u7edf\u914d\u7f6e\u7684IPv4\u81ea\u52a8\u4e34\u65f6\u7aef\u53e3\u9009\u62e9\u8303\u56f4\u3002<\/p>\n<h3>4.3 \u7aef\u53e30\u6709\u4ec0\u4e48\u7279\u6b8a\u542b\u4e49&#xff1f;<\/h3>\n<p>\u867d\u7136\u7aef\u53e3\u5b57\u6bb5\u80fd\u591f\u8868\u793a0&#xff0c;\u4f46\u666e\u901a\u670d\u52a1\u4e0d\u4f7f\u75280\u4f5c\u4e3a\u56fa\u5b9a\u670d\u52a1\u7aef\u53e3\u3002<\/p>\n<p>\u4f8b\u5982\u5728Linux Socket\u7f16\u7a0b\u4e2d&#xff1a;<\/p>\n<p>local<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u518d\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53ef\u4ee5\u8bf7\u6c42\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u9009\u62e9\u4e00\u4e2a\u53ef\u7528\u7684\u672c\u5730\u7aef\u53e3\u3002<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>bind\u7aef\u53e30<\/p>\n<p>\u901a\u5e38\u8868\u793a&#xff1a;<\/p>\n<p>\u8ba9\u7cfb\u7edf\u5206\u914d\u7aef\u53e3\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u8ba4\u8bc6\u77e5\u540d\u7aef\u53e3\u53f7<\/h2>\n<p>\u4e00\u4e9b\u5e7f\u6cdb\u4f7f\u7528\u7684\u7f51\u7edc\u670d\u52a1&#xff0c;\u901a\u5e38\u5177\u6709\u7ea6\u5b9a\u7684\u9ed8\u8ba4\u7aef\u53e3\u3002<\/p>\n<table>\n<tr>\u670d\u52a1\u5e38\u89c1\u534f\u8bae\u9ed8\u8ba4\u7aef\u53e3<\/tr>\n<tbody>\n<tr>\n<td>FTP\u63a7\u5236\u8fde\u63a5<\/td>\n<td>TCP<\/td>\n<td>21<\/td>\n<\/tr>\n<tr>\n<td>SSH<\/td>\n<td>TCP<\/td>\n<td>22<\/td>\n<\/tr>\n<tr>\n<td>Telnet<\/td>\n<td>TCP<\/td>\n<td>23<\/td>\n<\/tr>\n<tr>\n<td>DNS<\/td>\n<td>UDP\/TCP<\/td>\n<td>53<\/td>\n<\/tr>\n<tr>\n<td>HTTP<\/td>\n<td>TCP<\/td>\n<td>80<\/td>\n<\/tr>\n<tr>\n<td>HTTPS<\/td>\n<td>TCP&#xff0c;HTTP\/3\u5219\u4f7f\u7528QUIC\/UDP<\/td>\n<td>443<\/td>\n<\/tr>\n<tr>\n<td>DHCP\u670d\u52a1\u5668<\/td>\n<td>UDP<\/td>\n<td>67<\/td>\n<\/tr>\n<tr>\n<td>DHCP\u5ba2\u6237\u7aef<\/td>\n<td>UDP<\/td>\n<td>68<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u4e9b\u662f\u5e38\u89c1\u7684\u9ed8\u8ba4\u670d\u52a1\u7aef\u53e3\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>SSH&#xff1a;22<\/p>\n<p>HTTP&#xff1a;80<\/p>\n<p>HTTPS&#xff1a;443<\/p>\n<h3>5.1 \u5982\u4f55\u67e5\u770bLinux\u7cfb\u7edf\u4e2d\u7684\u670d\u52a1\u7aef\u53e3\u8bb0\u5f55&#xff1f;<\/h3>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">cat<\/span> \/etc\/services<\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u5f88\u591a\u670d\u52a1\u540d\u79f0\u4e0e\u7aef\u53e3\u53f7\u7684\u5bf9\u5e94\u5173\u7cfb\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>ssh       22\/tcp<\/p>\n<p>domain    53\/udp<\/p>\n<p>domain    53\/tcp<\/p>\n<p>http      80\/tcp<\/p>\n<p>\u8fd8\u53ef\u4ee5&#xff1a;<\/p>\n<p><span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-E<\/span> <span class=\"token string\">&#039;^(ssh|http|https|domain)&#039;<\/span> \/etc\/services<\/p>\n<p>\u67e5\u770b\u6307\u5b9a\u670d\u52a1\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\/etc\/services \u662f\u5e38\u7528\u670d\u52a1\u540d\u79f0\u53ca\u7aef\u53e3\u53f7\u7684\u6ce8\u518c\u6620\u5c04\u6587\u4ef6&#xff0c;\u4e0d\u8868\u793a\u8fd9\u4e9b\u670d\u52a1\u4e00\u5b9a\u6b63\u5728\u8fd0\u884c\u3002<\/p>\n<h3>5.2 \u4e3a\u4ec0\u4e48\u81ea\u5df1\u5199\u670d\u52a1\u5668\u65f6\u901a\u5e38\u907f\u5f00\u77e5\u540d\u7aef\u53e3&#xff1f;<\/h3>\n<p>\u56e0\u4e3a\u8fd9\u4e9b\u7aef\u53e3\u5df2\u7ecf\u5177\u6709\u5e38\u89c1\u7528\u9014\u3002<\/p>\n<p>\u53e6\u5916&#xff0c;\u5728\u666e\u901aLinux\u73af\u5883\u4e0b&#xff0c;\u7ed1\u5b9a1024\u4ee5\u4e0b\u7684\u7aef\u53e3\u901a\u5e38\u9700\u8981\u76f8\u5e94\u6743\u9650\u3002<\/p>\n<p>\u56e0\u6b64\u6211\u4eec\u8fdb\u884c\u8bfe\u7a0b\u5b9e\u9a8c\u65f6&#xff0c;\u66f4\u9002\u5408\u4f7f\u7528&#xff1a;<\/p>\n<p>8080<\/p>\n<p>8888<\/p>\n<p>9090<\/p>\n<p>\u7b49\u975e\u77e5\u540d\u7aef\u53e3\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>.\/udp_server <span class=\"token number\">8888<\/span><\/p>\n<p>\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4e0e\u5e38\u89c1\u670d\u52a1\u7aef\u53e3\u53d1\u751f\u51b2\u7a81\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221739-6aed008344556.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u516d\u3001\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7aef\u53e3\u7ed1\u5b9a\u95ee\u9898<\/h2>\n<p>\u73b0\u5728\u601d\u8003\u4e24\u4e2a\u95ee\u9898&#xff1a;<\/p>\n<p>\u95ee\u9898\u4e00&#xff1a;\u4e00\u4e2a\u8fdb\u7a0b\u662f\u5426\u53ef\u4ee5bind\u591a\u4e2a\u7aef\u53e3\u53f7&#xff1f;<\/p>\n<p>\u95ee\u9898\u4e8c&#xff1a;\u4e00\u4e2a\u7aef\u53e3\u53f7\u662f\u5426\u53ef\u4ee5\u88ab\u591a\u4e2a\u8fdb\u7a0bbind&#xff1f;<\/p>\n<p>\u8fd9\u4e24\u4e2a\u95ee\u9898\u5728Socket\u7f16\u7a0b\u4e2d\u5f88\u5e38\u89c1\u3002<\/p>\n<h3>6.1 \u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5bind\u591a\u4e2a\u7aef\u53e3\u5417&#xff1f;<\/h3>\n<p>\u53ef\u4ee5&#xff0c;\u4f46\u9700\u8981\u6709\u591a\u4e2a\u76f8\u5e94\u7684Socket\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> sockfd1 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    AF_INET<span class=\"token punctuation\">,<\/span><br \/>\n    SOCK_DGRAM<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> sockfd2 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    AF_INET<span class=\"token punctuation\">,<\/span><br \/>\n    SOCK_DGRAM<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5206\u522b\u7ed1\u5b9a&#xff1a;<\/p>\n<p>sockfd1 \u2192 8888<\/p>\n<p>sockfd2 \u2192 9999<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p>\u540c\u4e00\u4e2a\u8fdb\u7a0b<br \/>\n     |<br \/>\n     &#043;&#8212;&#8212; UDP Socket 8888<br \/>\n     |<br \/>\n     &#043;&#8212;&#8212; UDP Socket 9999<\/p>\n<p>\u8fd9\u662f\u5141\u8bb8\u7684\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\u540c\u4e00\u4e2aSocket\u5728\u6b63\u5e38\u4f7f\u7528\u4e2d\u4e0d\u662f\u901a\u8fc7\u591a\u6b21 bind() \u6765\u7ed1\u5b9a\u591a\u4e2a\u7aef\u53e3\u7684\u3002<\/p>\n<p>\u800c\u662f&#xff1a;<\/p>\n<p>\u4e00\u4e2a\u8fdb\u7a0b\u521b\u5efa\u591a\u4e2aSocket&#xff0c;\u5206\u522b\u7ed1\u5b9a\u4e0d\u540c\u7aef\u53e3\u3002<\/p>\n<h3>6.2 \u4e00\u4e2a\u7aef\u53e3\u80fd\u5426\u88ab\u591a\u4e2a\u8fdb\u7a0bbind&#xff1f;<\/h3>\n<p>\u4e00\u822c\u60c5\u51b5\u4e0b&#xff0c;\u5982\u679c\u591a\u4e2aUDP Socket\u8bd5\u56fe\u7ed1\u5b9a\u76f8\u540c\u7684&#xff1a;<\/p>\n<p>\u672c\u5730IP<\/p>\n<p>\u672c\u5730\u7aef\u53e3<\/p>\n<p>\u534f\u8bae<\/p>\n<p>\u540e\u9762\u7684\u7ed1\u5b9a\u53ef\u80fd\u56e0\u4e3a\u5730\u5740\u5df2\u88ab\u5360\u7528\u800c\u5931\u8d25\u3002<\/p>\n<p>\u5178\u578b\u9519\u8bef&#xff1a;<\/p>\n<p>bind: Address already in use<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Process-A<br \/>\n    |<br \/>\n    v<br \/>\n127.0.0.1:8888<\/p>\n<p>\u518d\u542f\u52a8&#xff1a;<\/p>\n<p>Process-B<br \/>\n    |<br \/>\n    v<br \/>\n127.0.0.1:8888<\/p>\n<p>\u5728\u9ed8\u8ba4\u914d\u7f6e\u4e0b&#xff0c;\u7b2c\u4e8c\u4e2a\u8fdb\u7a0b\u901a\u5e38\u4e0d\u80fd\u76f4\u63a5\u7ed1\u5b9a\u5b8c\u5168\u76f8\u540c\u7684Socket\u5730\u5740\u3002<\/p>\n<h3>6.3 \u662f\u5426\u7edd\u5bf9\u4e0d\u5141\u8bb8&#xff1f;<\/h3>\n<p>\u5e76\u4e0d\u662f\u3002<\/p>\n<p>Linux\u63d0\u4f9b&#xff1a;<\/p>\n<p>SO_REUSEADDR<br \/>\nSO_REUSEPORT<\/p>\n<p>\u7b49Socket\u9009\u9879\u3002<\/p>\n<p>\u5728\u6ee1\u8db3\u5bf9\u5e94\u6761\u4ef6\u65f6&#xff0c;\u53ef\u4ee5\u5b9e\u73b0\u67d0\u4e9b\u5730\u5740\u6216\u7aef\u53e3\u590d\u7528\u884c\u4e3a\u3002<\/p>\n<p>\u6b64\u5916&#xff1a;<\/p>\n<p>127.0.0.1:8888<\/p>\n<p>192.168.1.100:8888<\/p>\n<p>\u4e5f\u4e0d\u7b49\u540c\u4e8e\u5b8c\u5168\u76f8\u540c\u7684\u672c\u5730\u7ed1\u5b9a\u5730\u5740\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u4e0d\u80fd\u7b80\u5355\u5f97\u51fa&#xff1a;<\/p>\n<p>\u67d0\u4e2a\u6570\u5b57\u7aef\u53e3\u5728\u6574\u53f0\u4e3b\u673a\u4e0a\u6c38\u8fdc\u53ea\u80fd\u51fa\u73b0\u4e00\u6b21<\/p>\n<p>\u8fd9\u6837\u7684\u7ed3\u8bba\u3002<\/p>\n<p>\u4f46\u5bf9\u4e8e\u521d\u5b66\u8005\u7f16\u5199\u7684\u666e\u901aUDP\u670d\u52a1\u5668&#xff0c;\u53ef\u4ee5\u5148\u6309\u7167&#xff1a;<\/p>\n<p>\u76f8\u540c\u534f\u8bae\u3001\u76f8\u540c\u672c\u5730\u5730\u5740\u548c\u7aef\u53e3&#xff0c;\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u907f\u514d\u91cd\u590d\u7ed1\u5b9a\u3002<\/p>\n<p>\u8fd9\u4e2a\u539f\u5219\u7406\u89e3\u3002<\/p>\n<hr \/>\n<h2>\u4e03\u3001\u6b63\u5f0f\u8ba4\u8bc6UDP\u534f\u8bae<\/h2>\n<p>UDP\u5168\u79f0&#xff1a;<\/p>\n<p>User Datagram Protocol<\/p>\n<p>\u4e2d\u6587&#xff1a;<\/p>\n<p>\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae\u3002<\/p>\n<p>\u5b83\u5c5e\u4e8eTCP\/IP\u4f53\u7cfb\u7ed3\u6784\u4e2d\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002<\/p>\n<p>\u521b\u5efaUDP Socket&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> sockfd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    AF_INET<span class=\"token punctuation\">,<\/span><br \/>\n    SOCK_DGRAM<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<p>AF_INET&#xff1a;IPv4<\/p>\n<p>SOCK_DGRAM&#xff1a;\u6570\u636e\u62a5Socket<\/p>\n<p>0&#xff1a;\u4f7f\u7528\u5bf9\u5e94\u7684\u9ed8\u8ba4\u534f\u8bae<\/p>\n<p>\u4e0eTCP\u6700\u5927\u7684\u533a\u522b\u4e4b\u4e00\u662f&#xff1a;<\/p>\n<p>UDP\u4e0d\u9700\u8981\u901a\u8fc7\u8fde\u63a5\u5efa\u7acb\u8fc7\u7a0b&#xff0c;\u5c31\u80fd\u5411\u6307\u5b9a\u5730\u5740\u53d1\u9001\u6570\u636e\u62a5\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    message<span class=\"token punctuation\">,<\/span><br \/>\n    length<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53ea\u9700\u8981\u63d0\u4f9b\u5bf9\u7aef\u5730\u5740\u548c\u7aef\u53e3&#xff0c;\u5c31\u53ef\u4ee5\u5c1d\u8bd5\u53d1\u9001\u6570\u636e\u3002<\/p>\n<p>\u4f46\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u6570\u636e\u4e00\u5b9a\u80fd\u591f\u5230\u8fbe\u3002<\/p>\n<hr \/>\n<h2>\u516b\u3001UDP\u534f\u8bae\u62a5\u5934\u683c\u5f0f<\/h2>\n<p>\u7406\u89e3UDP&#xff0c;\u9996\u5148\u9700\u8981\u7406\u89e3\u5176\u62a5\u5934\u3002<\/p>\n<p>UDP\u62a5\u5934\u975e\u5e38\u7b80\u5355\u3002<\/p>\n<p>\u57fa\u672c\u683c\u5f0f&#xff1a;<\/p>\n<p> 0                   15 16                  31<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n|     16\u4f4d\u6e90\u7aef\u53e3\u53f7     |     16\u4f4d\u76ee\u7684\u7aef\u53e3\u53f7   |<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n|      16\u4f4dUDP\u957f\u5ea6     |      16\u4f4dUDP\u6821\u9a8c\u548c   |<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;<br \/>\n|                                             |<br \/>\n|               UDP\u6709\u6548\u8f7d\u8377                   |<br \/>\n|                                             |<br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#043;<\/p>\n<p>UDP\u62a5\u5934\u5305\u542b\u56db\u4e2a16\u4f4d\u5b57\u6bb5&#xff1a;<\/p>\n<p>\u6e90\u7aef\u53e3\u53f7<\/p>\n<p>\u76ee\u7684\u7aef\u53e3\u53f7<\/p>\n<p>UDP\u957f\u5ea6<\/p>\n<p>UDP\u6821\u9a8c\u548c<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         4<\/p>\n<p>         \u00d7<\/p>\n<p>         16<\/p>\n<p>         &#061;<\/p>\n<p>         64<\/p>\n<p>         \u00a0bit<\/p>\n<p>         4 \\\\times 16 &#061; 64 \\\\text{ bit} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">4<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u00d7<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">16<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6944em\"><\/span><span class=\"mord\">64<\/span><span class=\"mord text\"><span class=\"mord\">\u00a0bit<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u6362\u7b97\u4e3a\u5b57\u8282&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         64<\/p>\n<p>         \/<\/p>\n<p>         8<\/p>\n<p>         &#061;<\/p>\n<p>         8<\/p>\n<p>         \u00a0Byte<\/p>\n<p>         64 \/ 8 &#061; 8 \\\\text{ Byte} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 1em;vertical-align: -0.25em\"><\/span><span class=\"mord\">64\/8<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.8778em;vertical-align: -0.1944em\"><\/span><span class=\"mord\">8<\/span><span class=\"mord text\"><span class=\"mord\">\u00a0Byte<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>UDP\u56fa\u5b9a\u62a5\u5934\u957f\u5ea6\u4e3a8\u5b57\u8282\u3002<\/p>\n<h3>8.1 \u6e90\u7aef\u53e3\u53f7<\/h3>\n<p>\u8868\u793a\u53d1\u9001\u65b9\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Client&#xff1a;50001<\/p>\n<h3>8.2 \u76ee\u7684\u7aef\u53e3\u53f7<\/h3>\n<p>\u8868\u793a\u63a5\u6536\u65b9\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Server&#xff1a;8888<\/p>\n<p>\u670d\u52a1\u5668\u53ef\u4ee5\u6839\u636e\u76ee\u7684\u7aef\u53e3\u7b49\u4fe1\u606f\u627e\u5230\u5bf9\u5e94Socket\u3002<\/p>\n<h3>8.3 UDP\u957f\u5ea6<\/h3>\n<p>UDP\u957f\u5ea6\u5b57\u6bb5\u5360&#xff1a;<\/p>\n<p>16\u4f4d<\/p>\n<p>\u5b83\u8868\u793a&#xff1a;<\/p>\n<p>UDP\u62a5\u5934 &#043; UDP\u6570\u636e<\/p>\n<p>\u7684\u603b\u957f\u5ea6\u3002<\/p>\n<p>\u516c\u5f0f&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>          L<\/p>\n<p>          UDP<\/p>\n<p>         &#061;<\/p>\n<p>          L<\/p>\n<p>          Header<\/p>\n<p>         &#043;<\/p>\n<p>          L<\/p>\n<p>          Data<\/p>\n<p>         L_{\\\\text{UDP}} &#061; L_{\\\\text{Header}} &#043; L_{\\\\text{Data}} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3283em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">UDP<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3361em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">Header<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3283em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">Data<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u7531\u4e8eUDP\u62a5\u5934\u56fa\u5b9a\u4e3a8\u5b57\u8282&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>          L<\/p>\n<p>          UDP<\/p>\n<p>         &#061;<\/p>\n<p>         8<\/p>\n<p>         &#043;<\/p>\n<p>          L<\/p>\n<p>          Data<\/p>\n<p>         L_{\\\\text{UDP}} &#061; 8 &#043; L_{\\\\text{Data}} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3283em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">UDP<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">8<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3283em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">Data<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u4f8b\u5982\u5e94\u7528\u5c42\u53d1\u9001&#xff1a;<\/p>\n<p>100\u5b57\u8282<\/p>\n<p>\u7684\u6709\u6548\u6570\u636e\u3002<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>          L<\/p>\n<p>          UDP<\/p>\n<p>         &#061;<\/p>\n<p>         8<\/p>\n<p>         &#043;<\/p>\n<p>         100<\/p>\n<p>         &#061;<\/p>\n<p>         108<\/p>\n<p>         \u00a0Byte<\/p>\n<p>         L_{\\\\text{UDP}} &#061; 8 &#043; 100 &#061; 108\\\\text{ Byte} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">L<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3283em\"><span class=\"\" style=\"top: -2.55em;margin-left: 0em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord text mtight\"><span class=\"mord mtight\">UDP<\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">8<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">100<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.8778em;vertical-align: -0.1944em\"><\/span><span class=\"mord\">108<\/span><span class=\"mord text\"><span class=\"mord\">\u00a0Byte<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u56e0\u6b64UDP\u62a5\u5934\u4e2d\u7684\u957f\u5ea6\u5b57\u6bb5\u662f&#xff1a;<\/p>\n<p>108<\/p>\n<p>\u800c\u4e0d\u662f100\u3002<\/p>\n<h3>8.4 UDP\u6821\u9a8c\u548c<\/h3>\n<p>UDP\u6821\u9a8c\u548c\u7528\u4e8e\u68c0\u6d4b\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u662f\u5426\u51fa\u73b0\u67d0\u4e9b\u9519\u8bef\u3002<\/p>\n<p>\u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u4e3a&#xff1a;<\/p>\n<p>\u53d1\u9001\u7aef\u8ba1\u7b97\u6821\u9a8c\u548c<br \/>\n       |<br \/>\n       v<br \/>\n\u5c06\u6821\u9a8c\u548c\u5199\u5165UDP\u62a5\u5934<br \/>\n       |<br \/>\n       v<br \/>\n\u63a5\u6536\u7aef\u8fdb\u884c\u6821\u9a8c<br \/>\n       |<br \/>\n       v<br \/>\n\u53d1\u73b0\u6821\u9a8c\u9519\u8bef<br \/>\n       |<br \/>\n       v<br \/>\n\u4e22\u5f03\u9519\u8bef\u6570\u636e\u62a5<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff0c;\u6821\u9a8c\u548c\u7528\u4e8e\u9519\u8bef\u68c0\u6d4b&#xff0c;\u4e0d\u662f\u52a0\u5bc6&#xff0c;\u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u6570\u636e\u53ef\u9760\u9001\u8fbe\u3002<\/p>\n<p>\u53e6\u5916&#xff0c;IPv4 UDP\u5b58\u5728\u6821\u9a8c\u548c\u672a\u4f7f\u7528\u7684\u7279\u6b8a\u60c5\u51b5&#xff1b;\u8fd9\u91cc\u5148\u91cd\u70b9\u7406\u89e3\u6b63\u5e38\u542f\u7528\u6821\u9a8c\u65f6\u7684\u9519\u8bef\u68c0\u6d4b\u4f5c\u7528\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221740-6aed0084de0c6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u4e5d\u3001UDP\u7684\u4e09\u4e2a\u6838\u5fc3\u7279\u70b9<\/h2>\n<p>\u7406\u89e3UDP\u65f6&#xff0c;\u6700\u91cd\u8981\u7684\u662f\u8bb0\u4f4f\u4e09\u4e2a\u5173\u952e\u8bcd&#xff1a;<\/p>\n<p>\u65e0\u8fde\u63a5<\/p>\n<p>\u4e0d\u53ef\u9760<\/p>\n<p>\u9762\u5411\u6570\u636e\u62a5<\/p>\n<p>\u53ef\u4ee5\u628aUDP\u7684\u6570\u636e\u4f20\u8f93\u8fc7\u7a0b\u7c7b\u6bd4\u4e3a&#xff1a;<\/p>\n<p>\u5bc4\u4fe1\u3002<\/p>\n<p>\u5bc4\u4fe1\u4e4b\u524d&#xff0c;\u6211\u4eec\u9700\u8981\u77e5\u9053&#xff1a;<\/p>\n<p>\u6536\u4ef6\u4eba\u7684\u5730\u5740<\/p>\n<p>\u4f46\u4e0d\u9700\u8981\u4e0e\u6536\u4ef6\u4eba\u5efa\u7acb\u4e00\u6761\u6301\u7eed\u5b58\u5728\u7684\u8fde\u63a5\u3002<\/p>\n<p>\u4fe1\u4ef6\u5bc4\u51fa\u4ee5\u540e&#xff0c;\u4e5f\u4e0d\u80fd\u4ec5\u51ed\u201c\u5df2\u7ecf\u5bc4\u51fa\u201d\u5c31\u8ba4\u5b9a\u5bf9\u65b9\u4e00\u5b9a\u6536\u5230\u3002<\/p>\n<p>\u6b64\u5916&#xff0c;\u4e00\u5c01\u4fe1\u4ecd\u7136\u662f\u4e00\u5c01\u72ec\u7acb\u7684\u4fe1\u4ef6&#xff0c;\u4e0d\u4f1a\u56e0\u4e3a\u5176\u4e2d\u5185\u5bb9\u6709100\u4e2a\u5b57\u7b26&#xff0c;\u5c31\u81ea\u52a8\u53d8\u621010\u5c01\u5404\u5305\u542b10\u4e2a\u5b57\u7b26\u7684\u4fe1\u4ef6\u3002<\/p>\n<p>\u8fd9\u4e2a\u7c7b\u6bd4\u6709\u52a9\u4e8e\u7406\u89e3UDP\u7684\u4e3b\u8981\u7279\u5f81\u3002<\/p>\n<hr \/>\n<h2>\u5341\u3001\u7279\u70b9\u4e00&#xff1a;UDP\u662f\u65e0\u8fde\u63a5\u7684<\/h2>\n<h3>10.1 \u4ec0\u4e48\u53eb\u65e0\u8fde\u63a5&#xff1f;<\/h3>\n<p>TCP\u901a\u4fe1\u901a\u5e38\u9700\u8981&#xff1a;<\/p>\n<p>\u670d\u52a1\u5668listen<br \/>\n       |<br \/>\n       v<br \/>\n\u5ba2\u6237\u7aefconnect<br \/>\n       |<br \/>\n       v<br \/>\n\u8fde\u63a5\u5efa\u7acb<br \/>\n       |<br \/>\n       v<br \/>\n\u53d1\u9001\u4e0e\u63a5\u6536\u6570\u636e<\/p>\n<p>\u800cUDP\u4e0d\u9700\u8981\u76f8\u540c\u7684\u8fde\u63a5\u5efa\u7acb\u8fc7\u7a0b\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    message<span class=\"token punctuation\">,<\/span><br \/>\n    length<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token generic-function\"><span class=\"token function\">reinterpret_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>sockaddr<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8c03\u7528\u65f6\u5c31\u53ef\u4ee5\u6307\u5b9a\u76ee\u7684IP\u548c\u7aef\u53e3\u3002<\/p>\n<h3>10.2 \u4e3a\u4ec0\u4e48sendto\u9700\u8981\u76ee\u7684\u5730\u5740&#xff1f;<\/h3>\n<p>\u56e0\u4e3aUDP\u901a\u5e38\u6ca1\u6709TCP\u90a3\u6837\u901a\u8fc7\u8fde\u63a5\u5efa\u7acb\u8fc7\u7a0b\u5f62\u6210\u7684\u901a\u4fe1\u5173\u7cfb\u3002<\/p>\n<p>\u56e0\u6b64\u5728\u666e\u901aUDP\u7a0b\u5e8f\u4e2d&#xff0c;\u6bcf\u6b21\u53d1\u9001\u6570\u636e\u65f6\u90fd\u9700\u8981\u77e5\u9053\u53d1\u9001\u7ed9\u8c01\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u76ee\u7684IP&#xff1a;127.0.0.1<\/p>\n<p>\u76ee\u7684Port&#xff1a;8888<\/p>\n<h3>10.3 UDP\u670d\u52a1\u5668\u5982\u4f55\u77e5\u9053\u662f\u8c01\u53d1\u9001\u7684&#xff1f;<\/h3>\n<p>\u4f7f\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u65f6&#xff0c;\u53ef\u4ee5\u63a5\u6536\u6570\u636e\u5e76\u53d6\u5f97\u6765\u6e90\u5730\u5740\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>sockaddr_in peer<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>socklen_t len <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    buffer<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token generic-function\"><span class=\"token function\">reinterpret_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>sockaddr<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>peer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token operator\">&amp;<\/span>len<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6210\u529f\u63a5\u6536\u540e&#xff1a;<\/p>\n<p>peer<\/p>\n<p>\u4e2d\u5305\u542b\u53d1\u9001\u65b9\u5730\u5740\u4fe1\u606f\u3002<\/p>\n<p>\u670d\u52a1\u5668\u5c31\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5411\u8be5\u5730\u5740\u56de\u590d\u6d88\u606f\u3002<\/p>\n<h3>10.4 UDP\u80fd\u8c03\u7528connect\u5417&#xff1f;<\/h3>\n<p>\u53ef\u4ee5\u3002<\/p>\n<p>UDP Socket\u4e5f\u53ef\u4ee5\u8c03\u7528 connect()&#xff0c;\u7528\u4e8e\u8bbe\u7f6e\u9ed8\u8ba4\u901a\u4fe1\u5bf9\u7aef\u7b49\u884c\u4e3a\u3002<\/p>\n<p>\u4f46\u8fd9\u5e76\u4e0d\u610f\u5473\u7740UDP\u53d8\u6210\u4e86TCP&#xff0c;\u4e5f\u4e0d\u4f1a\u6267\u884cTCP\u4e09\u6b21\u63e1\u624b\u3002<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>UDP\u65e0\u8fde\u63a5\u6307\u7684\u662f\u534f\u8bae\u4e0d\u9700\u8981\u5efa\u7acbTCP\u5f0f\u8fde\u63a5&#xff0c;\u5e76\u4e0d\u662f\u8bf4UDP Socket API\u7edd\u5bf9\u4e0d\u80fd\u8c03\u7528connect\u3002<\/p>\n<hr \/>\n<h2>\u5341\u4e00\u3001\u7279\u70b9\u4e8c&#xff1a;UDP\u662f\u4e0d\u53ef\u9760\u7684<\/h2>\n<h3>11.1 \u4ec0\u4e48\u53eb\u4e0d\u53ef\u9760&#xff1f;<\/h3>\n<p>\u8fd9\u91cc\u7684\u201c\u4e0d\u53ef\u9760\u201d&#xff0c;\u4e0d\u662f\u8bf4UDP\u7a0b\u5e8f\u4e00\u5b9a\u7ecf\u5e38\u51fa\u9519\u3002<\/p>\n<p>\u800c\u662f\u6307&#xff1a;<\/p>\n<p>UDP\u534f\u8bae\u672c\u8eab\u4e0d\u63d0\u4f9bTCP\u90a3\u6837\u7684\u53ef\u9760\u4f20\u8f93\u4fdd\u8bc1\u3002<\/p>\n<p>\u4f8b\u5982\u5ba2\u6237\u7aef\u53d1\u9001&#xff1a;<\/p>\n<p>hello<\/p>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u6210\u529f\u3002<\/p>\n<p>\u8fd9\u5e76\u4e0d\u4fdd\u8bc1&#xff1a;<\/p>\n<p>\u670d\u52a1\u5668\u5df2\u7ecf\u63a5\u6536\u5230hello<\/p>\n<p>\u539f\u56e0\u5728\u4e8e&#xff1a;<\/p>\n<p>sendto\u6210\u529f<\/p>\n<p>\u901a\u5e38\u8868\u793a\u6570\u636e\u62a5\u5df2\u7ecf\u88ab\u672c\u673a\u7cfb\u7edf\u63a5\u53d7\u7528\u4e8e\u53d1\u9001\u5904\u7406\u3002<\/p>\n<p>\u4e0d\u7b49\u4e8e&#xff1a;<\/p>\n<p>\u6570\u636e\u5df2\u7ecf\u5230\u8fbe\u63a5\u6536\u7aef\u5e94\u7528\u7a0b\u5e8f<\/p>\n<h3>11.2 UDP\u6ca1\u6709\u786e\u8ba4\u673a\u5236<\/h3>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Client                      Server<br \/>\n  |                           |<br \/>\n  |&#8212;&#8212;&#8211; Datagram &#8212;&#8212;&#8211;&gt;|<br \/>\n  |                           |<\/p>\n<p>UDP\u672c\u8eab\u6ca1\u6709\u8981\u6c42\u63a5\u6536\u65b9\u5fc5\u987b\u901a\u8fc7UDP\u786e\u8ba4\u673a\u5236\u56de\u590d&#xff1a;<\/p>\n<p>\u6211\u5df2\u7ecf\u6210\u529f\u6536\u5230\u8fd9\u6761\u6570\u636e\u62a5<\/p>\n<h3>11.3 UDP\u6ca1\u6709\u81ea\u52a8\u91cd\u4f20\u673a\u5236<\/h3>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Client                      Server<br \/>\n  |                           |<br \/>\n  |&#8212;&#8212;- Datagram &#8212;&#8212;&#8212;-X<br \/>\n  |         \u4e22\u5931              |<\/p>\n<p>\u5982\u679c\u6570\u636e\u62a5\u5728\u7f51\u7edc\u4e2d\u4e22\u5931&#xff0c;UDP\u534f\u8bae\u5c42\u4e0d\u4f1a\u81ea\u52a8\u6309\u7167TCP\u5f0f\u91cd\u4f20\u673a\u5236\u91cd\u65b0\u53d1\u9001\u8fd9\u6761\u6570\u636e\u3002<\/p>\n<h3>11.4 UDP\u4e0d\u4fdd\u8bc1\u5230\u8fbe\u987a\u5e8f<\/h3>\n<p>\u5047\u8bbe\u5ba2\u6237\u7aef\u4f9d\u6b21\u53d1\u9001&#xff1a;<\/p>\n<p>Datagram-A<\/p>\n<p>Datagram-B<\/p>\n<p>Datagram-C<\/p>\n<p>\u63a5\u6536\u7aef\u53ef\u80fd\u53ea\u6536\u5230&#xff1a;<\/p>\n<p>Datagram-A<\/p>\n<p>Datagram-C<\/p>\n<p>\u4e5f\u53ef\u80fd\u6309\u4e0d\u540c\u987a\u5e8f\u6536\u5230\u6570\u636e\u62a5\u3002<\/p>\n<p>UDP\u534f\u8bae\u672c\u8eab\u4e0d\u4fdd\u8bc1\u6570\u636e\u62a5\u4e00\u5b9a\u6309\u7167\u53d1\u9001\u987a\u5e8f\u4ea4\u7ed9\u63a5\u6536\u5e94\u7528\u3002<\/p>\n<h3>11.5 UDP\u4e0d\u53ef\u9760&#xff0c;\u5e94\u7528\u5c42\u80fd\u5426\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93&#xff1f;<\/h3>\n<p>\u53ef\u4ee5\u3002<\/p>\n<p>\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u66f4\u53ef\u9760\u7684\u4f20\u8f93&#xff0c;\u53ef\u4ee5\u81ea\u884c\u8bbe\u8ba1&#xff1a;<\/p>\n<p>\u6d88\u606f\u7f16\u53f7<\/p>\n<p>\u786e\u8ba4\u673a\u5236<\/p>\n<p>\u8d85\u65f6\u68c0\u6d4b<\/p>\n<p>\u91cd\u4f20\u673a\u5236<\/p>\n<p>\u7b49\u529f\u80fd\u3002<\/p>\n<p>\u4e0d\u8fc7\u8fd9\u4e9b\u673a\u5236\u5c5e\u4e8e\u5e94\u7528\u5c42\u989d\u5916\u8bbe\u8ba1&#xff0c;\u5e76\u4e0d\u662fUDP\u9ed8\u8ba4\u5c31\u63d0\u4f9b\u7684\u80fd\u529b\u3002<\/p>\n<p>\u5f53\u524d\u9636\u6bb5\u53ea\u9700\u8981\u660e\u786e&#xff1a;<\/p>\n<p>UDP\u7684\u8bbe\u8ba1\u6ca1\u6709\u63d0\u4f9bTCP\u90a3\u6837\u7684\u53ef\u9760\u3001\u6709\u5e8f\u4f20\u8f93\u4fdd\u8bc1\u3002<\/p>\n<p>\u8865\u5145\u4e00\u70b9&#xff1a;\u67d0\u4e9b\u7f51\u7edc\u6216\u672c\u5730\u9519\u8bef\u4ecd\u53ef\u80fd\u901a\u8fc7Socket\u9519\u8bef\u673a\u5236\u53cd\u9988\u7ed9\u7a0b\u5e8f&#xff0c;\u56e0\u6b64\u4e0d\u80fd\u628aUDP\u4e0d\u53ef\u9760\u7406\u89e3\u4e3a\u201cSocket\u6c38\u8fdc\u4e0d\u4f1a\u62a5\u544a\u4efb\u4f55\u9519\u8bef\u201d\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221742-6aed0086a1278.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u5341\u4e8c\u3001\u7279\u70b9\u4e09&#xff1a;UDP\u662f\u9762\u5411\u6570\u636e\u62a5\u7684<\/h2>\n<p>\u8fd9\u662fUDP\u4e0eTCP\u975e\u5e38\u91cd\u8981\u7684\u533a\u522b\u3002<\/p>\n<h3>12.1 \u4ec0\u4e48\u53eb\u9762\u5411\u6570\u636e\u62a5&#xff1f;<\/h3>\n<p>\u5e94\u7528\u5c42\u6bcf\u6b21\u5411UDP\u63d0\u4ea4\u4e00\u6761\u6570\u636e\u62a5&#xff0c;UDP\u4f1a\u5c06\u5176\u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u6570\u636e\u62a5\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    buffer<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8868\u793a\u53d1\u9001&#xff1a;<\/p>\n<p>\u4e00\u6761\u5305\u542b100\u5b57\u8282\u6709\u6548\u8f7d\u8377\u7684UDP\u6570\u636e\u62a5<\/p>\n<p>UDP\u4e0d\u4f1a\u81ea\u884c\u628a\u5b83\u53d8\u6210&#xff1a;<\/p>\n<p>\u7b2c\u4e00\u676110\u5b57\u8282UDP\u6570\u636e\u62a5<\/p>\n<p>\u7b2c\u4e8c\u676110\u5b57\u8282UDP\u6570\u636e\u62a5<\/p>\n<p>\u2026\u2026<\/p>\n<p>\u7b2c\u5341\u676110\u5b57\u8282UDP\u6570\u636e\u62a5<\/p>\n<p>\u4e5f\u4e0d\u4f1a\u628a\u591a\u6b21\u5e94\u7528\u5c42\u53d1\u9001\u81ea\u52a8\u5408\u5e76\u4e3a\u4e00\u6761\u65b0\u7684UDP\u6570\u636e\u62a5\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;\u8fd9\u662fUDP\u6570\u636e\u62a5\u7684\u8fb9\u754c\u8bed\u4e49&#xff0c;\u4e0d\u5e94\u4e0e\u5e95\u5c42IP\u53ef\u80fd\u8fdb\u884c\u7684\u5206\u7247\u5904\u7406\u6df7\u6dc6\u3002<\/p>\n<h3>12.2 \u4e3a\u4ec0\u4e48\u4e00\u6b21\u53d1\u9001100\u5b57\u8282\u4e0d\u80fd\u752810\u6b21recvfrom\u63a5\u6536&#xff1f;<\/h3>\n<p>\u5047\u8bbe\u53d1\u9001\u65b9\u6267\u884c\u4e00\u6b21&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    buffer<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u8868\u793a&#xff1a;<\/p>\n<p>\u53d1\u9001\u4e00\u6761100\u5b57\u8282\u7684\u6570\u636e\u62a5<\/p>\n<p>\u63a5\u6536\u65b9\u5982\u679c\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    buffer<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8be5\u6570\u636e\u62a5\u6210\u529f\u5230\u8fbe\u3001\u7f13\u51b2\u533a\u8db3\u591f\u5927\u7684\u60c5\u51b5\u4e0b&#xff0c;\u53ef\u4ee5\u4e00\u6b21\u53d6\u51fa\u6574\u6761100\u5b57\u8282\u6570\u636e\u62a5\u3002<\/p>\n<p>\u4f46\u5982\u679c&#xff1a;<\/p>\n<p><span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    sockfd<span class=\"token punctuation\">,<\/span><br \/>\n    buffer<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5219\u63a5\u6536\u7f13\u51b2\u533a\u53ea\u80fd\u5bb9\u7eb310\u5b57\u8282\u3002<\/p>\n<p>\u5bf9\u4e8e\u666e\u901aUDP\u63a5\u6536\u64cd\u4f5c&#xff0c;\u8fd9\u6761\u6570\u636e\u62a5\u4f1a\u88ab\u622a\u65ad\u3002<\/p>\n<p>\u5269\u4f59\u90e8\u5206\u4e0d\u4f1a\u7559\u7740\u7b49\u5f85\u540e\u7eed9\u6b21 recvfrom() \u7ee7\u7eed\u8bfb\u53d6\u3002<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>\u4e00\u6761100\u5b57\u8282UDP\u6570\u636e\u62a5<br \/>\n            |<br \/>\n            v<br \/>\n      recvfrom\u8bfb\u53d610\u5b57\u8282<br \/>\n            |<br \/>\n            v<br \/>\n      \u5269\u4f5990\u5b57\u8282\u88ab\u4e22\u5f03<\/p>\n<p>\u4e0d\u80fd\u5199\u6210&#xff1a;<\/p>\n<p>recvfrom\u7b2c1\u6b21&#xff1a;10\u5b57\u8282<br \/>\nrecvfrom\u7b2c2\u6b21&#xff1a;10\u5b57\u8282<br \/>\n&#8230;<br \/>\nrecvfrom\u7b2c10\u6b21&#xff1a;10\u5b57\u8282<\/p>\n<p>\u6765\u63a5\u6536\u540c\u4e00\u6761\u6570\u636e\u62a5\u3002<\/p>\n<h3>12.3 \u5982\u679c\u5ba2\u6237\u7aef\u53d1\u900110\u6b21\u5462&#xff1f;<\/h3>\n<p>\u4f8b\u5982\u5ba2\u6237\u7aef\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token operator\">&#043;&#043;<\/span>i<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        sockfd<span class=\"token punctuation\">,<\/span><br \/>\n        buffer<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u90a3\u4e48\u8fd9\u5bf9\u5e94&#xff1a;<\/p>\n<p>10\u6761UDP\u6570\u636e\u62a5<\/p>\n<p>\u63a5\u6536\u7aef\u5982\u679c\u5168\u90e8\u6536\u5230&#xff0c;\u901a\u5e38\u9700\u8981\u5206\u522b\u63a5\u6536\u8fd910\u6761\u6570\u636e\u62a5\u3002<\/p>\n<p>\u4f46\u7531\u4e8eUDP\u4e0d\u4fdd\u8bc1\u53ef\u9760\u6027&#xff0c;\u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u4e00\u5b9a\u6536\u523010\u6761\u3002<\/p>\n<h3>12.4 TCP\u4e0eUDP\u5728\u8fd9\u91cc\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;<\/h3>\n<p>TCP\u9762\u5411\u5b57\u8282\u6d41\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u53d1\u9001100\u5b57\u8282<\/p>\n<p>\u63a5\u6536\u7aef\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21 read() \u7d2f\u8ba1\u8bfb\u53d6\u8fd9\u4e9b\u5b57\u8282\u3002<\/p>\n<p>\u800cUDP\u9762\u5411\u72ec\u7acb\u7684\u6570\u636e\u62a5\u3002<\/p>\n<p>\u4e00\u4e2aUDP\u63a5\u6536\u64cd\u4f5c\u9488\u5bf9\u4e00\u6761\u6570\u636e\u62a5&#xff0c;\u666e\u901a\u63a5\u6536\u4e0d\u4f1a\u5c06\u540c\u4e00\u6761\u6570\u636e\u62a5\u7684\u5269\u4f59\u90e8\u5206\u4fdd\u7559\u7ed9\u540e\u7eed\u8bfb\u53d6\u3002<\/p>\n<p>\u53ef\u4ee5\u6982\u62ec\u4e3a&#xff1a;<\/p>\n<p>TCP&#xff1a;<\/p>\n<p>\u8fde\u7eed\u5b57\u8282\u6d41<br \/>\n    |<br \/>\n    v<br \/>\n\u5e94\u7528\u5c42\u81ea\u884c\u786e\u5b9a\u6d88\u606f\u8fb9\u754c<\/p>\n<p>UDP&#xff1a;<\/p>\n<p>\u4e00\u6761\u6761\u72ec\u7acb\u6570\u636e\u62a5<br \/>\n    |<br \/>\n    v<br \/>\n\u4fdd\u7559\u6570\u636e\u62a5\u8fb9\u754c<\/p>\n<p>\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48UDP\u901a\u5e38\u4e0d\u9700\u8981\u50cfTCP\u90a3\u6837&#xff0c;\u4e13\u95e8\u901a\u8fc7\u957f\u5ea6\u524d\u7f00\u6765\u6062\u590d\u539f\u59cb\u6570\u636e\u62a5\u8fb9\u754c\u3002<\/p>\n<p>\u4f46\u5982\u679cUDP\u6570\u636e\u62a5\u8fc7\u5927\u3001\u88ab\u622a\u65ad\u6216\u8005\u4e22\u5931&#xff0c;\u5e94\u7528\u7a0b\u5e8f\u4ecd\u7136\u9700\u8981\u5904\u7406\u76f8\u5e94\u95ee\u9898\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221744-6aed008822137.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u5341\u4e09\u3001UDP\u7f13\u51b2\u533a\u662f\u600e\u6837\u5de5\u4f5c\u7684&#xff1f;<\/h2>\n<p>\u524d\u9762\u7406\u89e3\u4e86UDP\u6570\u636e\u62a5&#xff0c;\u73b0\u5728\u8fdb\u4e00\u6b65\u8ba8\u8bbaUDP Socket\u4e0e\u5185\u6838\u7f13\u51b2\u533a\u7684\u5173\u7cfb\u3002<\/p>\n<h3>13.1 UDP\u6ca1\u6709TCP\u90a3\u6837\u7684\u53ef\u9760\u53d1\u9001\u7f13\u51b2\u673a\u5236<\/h3>\n<p>\u5728TCP\u4e2d&#xff0c;\u53d1\u9001\u7f13\u51b2\u533a\u4e0e\u53ef\u9760\u4f20\u8f93\u673a\u5236\u5bc6\u5207\u76f8\u5173\u3002<\/p>\n<p>\u53d1\u9001\u51fa\u53bb\u4f46\u5c1a\u672a\u5b8c\u6210\u76f8\u5e94\u786e\u8ba4\u5904\u7406\u7684\u6570\u636e&#xff0c;\u53ef\u80fd\u9700\u8981\u7ee7\u7eed\u4fdd\u7559&#xff0c;\u4ee5\u652f\u6301\u53ef\u9760\u4f20\u8f93\u3002<\/p>\n<p>UDP\u4e0d\u63d0\u4f9b\u8fd9\u79cd\u786e\u8ba4\u4e0e\u81ea\u52a8\u91cd\u4f20\u673a\u5236\u3002<\/p>\n<p>\u56e0\u6b64\u901a\u5e38\u8bf4&#xff1a;<\/p>\n<p>UDP\u6ca1\u6709TCP\u90a3\u79cd\u610f\u4e49\u4e0a\u7684\u53d1\u9001\u7f13\u51b2\u673a\u5236\u3002<\/p>\n<p>\u4f8b\u5982\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4ee5\u540e&#xff0c;\u5185\u6838\u63a5\u6536\u5e94\u7528\u7a0b\u5e8f\u63d0\u4ea4\u7684\u6570\u636e\u62a5&#xff0c;\u5e76\u8fdb\u884c\u540e\u7eed\u53d1\u9001\u5904\u7406\u3002<\/p>\n<p>\u4f46\u4e0d\u9700\u8981\u4e3a\u4e86TCP\u5f0f\u786e\u8ba4\u548c\u91cd\u4f20&#xff0c;\u957f\u671f\u4fdd\u7559\u6bcf\u6761\u5df2\u53d1\u9001\u6570\u636e\u62a5\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\u8fd9\u4e0d\u7b49\u4e8eLinux\u5185\u6838\u5728UDP\u53d1\u9001\u8def\u5f84\u4e2d\u5b8c\u5168\u4e0d\u5b58\u5728\u4efb\u4f55\u7f13\u51b2\u6216\u961f\u5217\u3002<\/p>\n<p>UDP\u53d1\u9001\u65f6\u4ecd\u7136\u53ef\u80fd\u6d89\u53ca\u5185\u6838\u5185\u5b58\u4e0e\u961f\u5217\u8d44\u6e90&#xff0c;\u53ea\u662f\u5b83\u6ca1\u6709TCP\u90a3\u6837\u7684\u53ef\u9760\u91cd\u4f20\u7f13\u51b2\u8bed\u4e49\u3002<\/p>\n<h3>13.2 UDP\u5177\u6709\u63a5\u6536\u7f13\u51b2\u533a<\/h3>\n<p>UDP Socket\u5177\u6709\u63a5\u6536\u961f\u5217\u6216\u7f13\u51b2\u673a\u5236\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Datagram-A<br \/>\nDatagram-B<br \/>\nDatagram-C<\/p>\n<p>\u5230\u8fbe\u63a5\u6536\u4e3b\u673a\u540e&#xff0c;\u5185\u6838\u53ef\u4ee5\u5c06\u5b83\u4eec\u653e\u5165\u5bf9\u5e94Socket\u7684\u63a5\u6536\u961f\u5217\u3002<\/p>\n<p>\u5e94\u7528\u7a0b\u5e8f\u968f\u540e\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u53d6\u51fa\u6570\u636e\u62a5\u3002<\/p>\n<h3>13.3 \u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u4e0d\u53ca\u65f6\u8bfb\u53d6\u600e\u4e48\u529e&#xff1f;<\/h3>\n<p>\u5047\u8bbe\u670d\u52a1\u5668\u8fd0\u884c\u5f88\u6162\u3002<\/p>\n<p>\u5ba2\u6237\u7aef\u4e0d\u65ad\u53d1\u9001&#xff1a;<\/p>\n<p>Datagram-1<br \/>\nDatagram-2<br \/>\nDatagram-3<br \/>\n&#8230;<\/p>\n<p>\u670d\u52a1\u5668\u5374\u8fdf\u8fdf\u4e0d\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u90a3\u4e48Socket\u63a5\u6536\u7f13\u51b2\u533a\u53ef\u80fd\u9010\u6e10\u88ab\u5360\u6ee1\u3002<\/p>\n<p>\u5f53\u6ca1\u6709\u8db3\u591f\u7a7a\u95f4\u5bb9\u7eb3\u65b0\u7684\u6570\u636e\u62a5\u65f6&#xff0c;\u5c31\u53ef\u80fd\u53d1\u751f\u4e22\u5305\u3002<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>UDP\u63a5\u6536\u7f13\u51b2\u533a\u4e0d\u80fd\u4fdd\u8bc1\u5230\u8fbe\u7684\u6570\u636e\u62a5\u6c38\u8fdc\u4e0d\u4e22\u5931\u3002<\/p>\n<h3>13.4 UDP\u662f\u5426\u4fdd\u8bc1\u6570\u636e\u62a5\u987a\u5e8f&#xff1f;<\/h3>\n<p>UDP\u534f\u8bae\u672c\u8eab\u4e0d\u4fdd\u8bc1\u6570\u636e\u62a5\u7684\u5230\u8fbe\u987a\u5e8f\u3002<\/p>\n<p>\u5373\u4f7f\u63a5\u6536\u7f13\u51b2\u533a\u80fd\u591f\u4fdd\u5b58\u5230\u8fbe\u7684\u6570\u636e\u62a5&#xff0c;\u4e5f\u4e0d\u7b49\u4e8e\u6574\u4e2a\u7f51\u7edc\u4f20\u8f93\u8fc7\u7a0b\u4e00\u5b9a\u4fdd\u6301\u53d1\u9001\u987a\u5e8f\u3002<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>\u53d1\u9001\u987a\u5e8f<\/p>\n<p>\u4e0d\u4e00\u5b9a\u7b49\u4e8e&#xff1a;<\/p>\n<p>\u63a5\u6536\u987a\u5e8f<\/p>\n<hr \/>\n<h2>\u5341\u56db\u3001\u4e3a\u4ec0\u4e48\u8bf4UDP\u652f\u6301\u5168\u53cc\u5de5&#xff1f;<\/h2>\n<h3>14.1 \u4ec0\u4e48\u662f\u5168\u53cc\u5de5&#xff1f;<\/h3>\n<p>\u5168\u53cc\u5de5\u610f\u5473\u7740&#xff1a;<\/p>\n<p>\u901a\u4fe1\u53cc\u65b9\u53ef\u4ee5\u540c\u65f6\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>Client                         Server<br \/>\n   |                              |<br \/>\n   |&#8212;&#8212;- Datagram-A &#8212;&#8212;&#8212;-&gt;|<br \/>\n   |                              |<br \/>\n   |&lt;&#8212;&#8212; Datagram-B &#8212;&#8212;&#8212;&#8211;|<br \/>\n   |                              |<\/p>\n<p>UDP Socket\u65e2\u53ef\u4ee5\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">sendto<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4e5f\u53ef\u4ee5\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">recvfrom<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u6240\u4ee5\u540c\u4e00\u4e2aUDP Socket\u53ef\u4ee5\u53c2\u4e0e\u53cc\u5411\u6570\u636e\u901a\u4fe1\u3002<\/p>\n<h3>14.2 \u4e3a\u4ec0\u4e48UDP\u6ca1\u6709\u8fde\u63a5\u4e5f\u80fd\u5168\u53cc\u5de5&#xff1f;<\/h3>\n<p>\u56e0\u4e3a&#xff1a;<\/p>\n<p>\u662f\u5426\u9700\u8981\u5efa\u7acb\u8fde\u63a5<\/p>\n<p>\u4e0e&#xff1a;<\/p>\n<p>\u662f\u5426\u80fd\u591f\u53cc\u5411\u6536\u53d1\u6570\u636e<\/p>\n<p>\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u95ee\u9898\u3002<\/p>\n<p>UDP\u4e0d\u9700\u8981TCP\u5f0f\u8fde\u63a5\u5efa\u7acb\u8fc7\u7a0b\u3002<\/p>\n<p>\u4f46\u6bcf\u4e00\u65b9\u4ecd\u7136\u53ef\u4ee5&#xff1a;<\/p>\n<p>\u53d1\u9001UDP\u6570\u636e\u62a5<\/p>\n<p>\u63a5\u6536UDP\u6570\u636e\u62a5<\/p>\n<p>\u56e0\u6b64UDP\u53ef\u4ee5\u652f\u6301\u5168\u53cc\u5de5\u901a\u4fe1\u3002<\/p>\n<h3>14.3 \u5168\u53cc\u5de5\u662f\u5426\u8868\u793a\u5e94\u7528\u7a0b\u5e8f\u4e00\u5b9a\u540c\u65f6\u8c03\u7528sendto\u4e0erecvfrom&#xff1f;<\/h3>\n<p>\u4e0d\u662f\u3002<\/p>\n<p>\u4f8b\u5982\u6211\u4eec\u63a5\u4e0b\u6765\u5b9e\u73b0\u7684UDP Echo\u7a0b\u5e8f\u91c7\u7528&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aef\u53d1\u9001<br \/>\n    |<br \/>\n    v<br \/>\n\u670d\u52a1\u5668\u63a5\u6536<br \/>\n    |<br \/>\n    v<br \/>\n\u670d\u52a1\u5668\u8fd4\u56de<br \/>\n    |<br \/>\n    v<br \/>\n\u5ba2\u6237\u7aef\u63a5\u6536<\/p>\n<p>\u8fd9\u662f\u4e00\u79cd\u8bf7\u6c42\u2014\u54cd\u5e94\u5f0f\u4e1a\u52a1\u6d41\u7a0b\u3002<\/p>\n<p>\u867d\u7136\u4e1a\u52a1\u4e0a\u6309\u987a\u5e8f\u6267\u884c&#xff0c;\u4f46UDP Socket\u672c\u8eab\u4ecd\u7136\u5177\u6709\u53cc\u5411\u901a\u4fe1\u80fd\u529b\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221745-6aed008991ea6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h2>\u5341\u4e94\u3001UDP\u5355\u6761\u6570\u636e\u62a5\u80fd\u4f20\u8f93\u591a\u5927\u7684\u6570\u636e&#xff1f;<\/h2>\n<p>UDP\u62a5\u5934\u4e2d\u7684\u957f\u5ea6\u5b57\u6bb5\u662f&#xff1a;<\/p>\n<p>16\u4f4d<\/p>\n<p>\u56e0\u6b64\u6700\u5927\u80fd\u591f\u8868\u793a&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>          2<\/p>\n<p>          16<\/p>\n<p>         \u2212<\/p>\n<p>         1<\/p>\n<p>         &#061;<\/p>\n<p>         65535<\/p>\n<p>         2^{16}-1&#061;65535 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.9474em;vertical-align: -0.0833em\"><\/span><span class=\"mord\"><span class=\"mord\">2<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8641em\"><span class=\"\" style=\"top: -3.113em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">16<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">1<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">65535<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5373&#xff1a;<\/p>\n<p>65535\u5b57\u8282<\/p>\n<p>\u4f46\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\u8fd9\u4e2a\u957f\u5ea6\u5305\u62ec&#xff1a;<\/p>\n<p>UDP\u62a5\u5934<\/p>\n<p>UDP\u6709\u6548\u8f7d\u8377<\/p>\n<h3>15.1 \u4ec5\u8003\u8651UDP\u62a5\u5934<\/h3>\n<p>UDP\u62a5\u5934\u53608\u5b57\u8282\u3002<\/p>\n<p>\u56e0\u6b64\u6309UDP\u957f\u5ea6\u5b57\u6bb5\u8ba1\u7b97&#xff0c;\u6700\u5927\u6709\u6548\u8f7d\u8377\u4e3a&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         65535<\/p>\n<p>         \u2212<\/p>\n<p>         8<\/p>\n<p>         &#061;<\/p>\n<p>         65527<\/p>\n<p>         65535-8&#061;65527 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">65535<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">8<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">65527<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5373&#xff1a;<\/p>\n<p>65527\u5b57\u8282<\/p>\n<h3>15.2 \u4e3a\u4ec0\u4e48IPv4\u4e0b\u901a\u5e38\u8fd8\u8981\u51cf\u53bbIP\u62a5\u5934&#xff1f;<\/h3>\n<p>\u56e0\u4e3aUDP\u6570\u636e\u62a5\u8fd8\u9700\u8981\u7531IP\u5c42\u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n<p>\u5728\u666e\u901aIPv4\u3001\u4e0d\u5305\u542bIP\u9009\u9879\u7684\u60c5\u51b5\u4e0b&#xff0c;IPv4\u5934\u90e8\u901a\u5e38\u536020\u5b57\u8282\u3002<\/p>\n<p>IPv4\u6570\u636e\u62a5\u7684\u603b\u957f\u5ea6\u5b57\u6bb5\u4e5f\u662f16\u4f4d\u3002<\/p>\n<p>\u6240\u4ee5\u5355\u4e2a\u666e\u901aIPv4\u6570\u636e\u62a5\u4e2d&#xff0c;UDP\u6709\u6548\u8f7d\u8377\u7684\u6700\u5927\u503c\u901a\u5e38\u4e3a&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         65535<\/p>\n<p>         \u2212<\/p>\n<p>         20<\/p>\n<p>         \u2212<\/p>\n<p>         8<\/p>\n<p>         &#061;<\/p>\n<p>         65507<\/p>\n<p>         65535-20-8&#061;65507 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">65535<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">20<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">8<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">65507<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5373&#xff1a;<\/p>\n<p>65507\u5b57\u8282\u3002<\/p>\n<p>\u8fd9\u4e0e\u5355\u7eaf\u4eceUDP\u957f\u5ea6\u5b57\u6bb5\u8ba1\u7b97\u51fa\u768465527\u5b57\u8282\u4e0d\u540c\u3002<\/p>\n<p>\u56e0\u6b64&#xff0c;\u5b66\u4e60\u65f6\u4e0d\u8981\u7b80\u5355\u8ba4\u4e3a&#xff1a;<\/p>\n<p>UDP\u53ef\u4ee5\u53d1\u900165535\u5b57\u8282\u7528\u6237\u6570\u636e<\/p>\n<p>\u66f4\u51c6\u786e\u7684\u8bf4\u6cd5\u662f&#xff1a;<\/p>\n<p>UDP\u957f\u5ea6\u5b57\u6bb5\u6700\u591a\u80fd\u8868\u793a65535\u5b57\u8282\u7684UDP\u6570\u636e\u62a5&#xff0c;\u5b9e\u9645\u5141\u8bb8\u7684\u7528\u6237\u6570\u636e\u957f\u5ea6\u8fd8\u53d7\u5230IP\u5c42\u7b49\u6761\u4ef6\u9650\u5236\u3002<\/p>\n<h3>15.3 \u4e3a\u4ec0\u4e48\u901a\u5e38\u4e0d\u5efa\u8bae\u53d1\u9001\u7279\u522b\u5927\u7684UDP\u6570\u636e\u62a5&#xff1f;<\/h3>\n<p>\u56e0\u4e3a\u5b9e\u9645\u7f51\u7edc\u4e2d\u5b58\u5728&#xff1a;<\/p>\n<p>\u4e0d\u540c\u94fe\u8def\u548c\u8def\u5f84\u7684\u62a5\u6587\u5927\u5c0f\u9650\u5236<\/p>\n<p>\u975e\u5e38\u5927\u7684\u6570\u636e\u62a5\u53ef\u80fd\u589e\u52a0\u5e95\u5c42\u5206\u7247\u3001\u4e22\u5931\u7b49\u95ee\u9898\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u56e0\u6b64\u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u901a\u5e38\u4f1a\u8c28\u614e\u63a7\u5236UDP\u62a5\u6587\u5927\u5c0f&#xff0c;\u800c\u4e0d\u662f\u9ed8\u8ba4\u6bcf\u6761\u6570\u636e\u62a5\u90fd\u63a5\u8fd164KB\u3002<\/p>\n<h3>15.4 \u8d85\u8fc7UDP\u5355\u6761\u6570\u636e\u62a5\u9650\u5236\u600e\u4e48\u529e&#xff1f;<\/h3>\n<p>\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u53d1\u9001\u8d85\u8fc7\u5355\u6761UDP\u6570\u636e\u62a5\u4e0a\u9650\u7684\u6570\u636e&#xff0c;\u5c31\u4e0d\u80fd\u901a\u8fc7\u4e00\u6761\u666e\u901aUDP\u6570\u636e\u62a5\u5b8c\u6210\u3002<\/p>\n<p>\u9700\u8981\u5728\u5e94\u7528\u5c42\u8bbe\u8ba1&#xff1a;<\/p>\n<p>\u62c6\u5206\u6570\u636e<br \/>\n    |<br \/>\n    v<br \/>\n\u591a\u6b21\u53d1\u9001<br \/>\n    |<br \/>\n    v<br \/>\n\u63a5\u6536\u591a\u4e2a\u6570\u636e\u62a5<br \/>\n    |<br \/>\n    v<br \/>\n\u6309\u7167\u89c4\u5219\u91cd\u65b0\u62fc\u88c5<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e00\u4efd\u5927\u6587\u4ef6<br \/>\n    |<br \/>\n    &#043;&#8212;- Datagram-1<br \/>\n    |<br \/>\n    &#043;&#8212;- Datagram-2<br \/>\n    |<br \/>\n    &#043;&#8212;- Datagram-3<\/p>\n<p>\u63a5\u6536\u7aef\u9700\u8981\u77e5\u9053&#xff1a;<\/p>\n<p>\u54ea\u4e2a\u6570\u636e\u62a5\u5c5e\u4e8e\u54ea\u4efd\u6570\u636e&#xff1f;<\/p>\n<p>\u5404\u6570\u636e\u62a5\u7684\u987a\u5e8f\u662f\u4ec0\u4e48&#xff1f;<\/p>\n<p>\u6709\u6ca1\u6709\u53d1\u751f\u4e22\u5931&#xff1f;<\/p>\n<p>\u56e0\u6b64\u7b80\u5355\u62c6\u5206\u8fd8\u4e0d\u591f\u3002<\/p>\n<p>\u5982\u679c\u4e1a\u52a1\u8981\u6c42\u5b8c\u6574\u3001\u6b63\u786e\u7684\u91cd\u7ec4&#xff0c;\u5c31\u9700\u8981\u8fdb\u4e00\u6b65\u8bbe\u8ba1\u7f16\u53f7\u3001\u5b8c\u6574\u6027\u68c0\u67e5\u53ca\u5fc5\u8981\u7684\u4e22\u5931\u5904\u7406\u673a\u5236\u3002<\/p>\n<p>\u5f53\u524d\u5148\u7406\u89e3&#xff1a;<\/p>\n<p>UDP\u5355\u6761\u6570\u636e\u62a5\u5b58\u5728\u957f\u5ea6\u9650\u5236&#xff0c;\u8d85\u8fc7\u9650\u5236\u9700\u8981\u5e94\u7528\u7a0b\u5e8f\u81ea\u884c\u8bbe\u8ba1\u66f4\u9ad8\u5c42\u7684\u6570\u636e\u7ec4\u7ec7\u65b9\u5f0f\u3002<\/p>\n<hr \/>\n<h2>\u5341\u516d\u3001\u6709\u54ea\u4e9b\u57fa\u4e8eUDP\u7684\u5e94\u7528\u5c42\u534f\u8bae&#xff1f;<\/h2>\n<p>UDP\u867d\u7136\u4e0d\u63d0\u4f9b\u53ef\u9760\u3001\u6709\u5e8f\u4f20\u8f93\u4fdd\u8bc1&#xff0c;\u4f46\u5b83\u4ecd\u7136\u88ab\u8bb8\u591a\u5e94\u7528\u5c42\u534f\u8bae\u91c7\u7528\u3002<\/p>\n<p>\u5e38\u89c1\u4f8b\u5b50&#xff1a;<\/p>\n<h3>16.1 NFS<\/h3>\n<p>NFS\u5168\u79f0&#xff1a;<\/p>\n<p>Network File System<\/p>\n<p>\u4e2d\u6587&#xff1a;<\/p>\n<p>\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf<\/p>\n<p>\u5b83\u7528\u4e8e\u901a\u8fc7\u7f51\u7edc\u8bbf\u95ee\u6587\u4ef6\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n<p>\u4e00\u4e9bNFS\u7248\u672c\u6216\u5b9e\u73b0\u80fd\u591f\u4f7f\u7528UDP&#xff0c;\u73b0\u4ee3\u90e8\u7f72\u4e2d\u4e5f\u5e7f\u6cdb\u4f7f\u7528TCP\u3002<\/p>\n<h3>16.2 TFTP<\/h3>\n<p>TFTP\u5168\u79f0&#xff1a;<\/p>\n<p>Trivial File Transfer Protocol<\/p>\n<p>\u4e2d\u6587&#xff1a;<\/p>\n<p>\u7b80\u5355\u6587\u4ef6\u4f20\u8f93\u534f\u8bae<\/p>\n<p>\u5b83\u91c7\u7528UDP\u4f5c\u4e3a\u4f20\u8f93\u5c42\u534f\u8bae&#xff0c;\u5e76\u5728\u5e94\u7528\u5c42\u89c4\u5b9a\u6570\u636e\u5757\u3001\u786e\u8ba4\u7b49\u673a\u5236\u3002<\/p>\n<h3>16.3 DHCP<\/h3>\n<p>DHCP\u5168\u79f0&#xff1a;<\/p>\n<p>Dynamic Host Configuration Protocol<\/p>\n<p>\u4e2d\u6587&#xff1a;<\/p>\n<p>\u52a8\u6001\u4e3b\u673a\u914d\u7f6e\u534f\u8bae<\/p>\n<p>\u7528\u4e8e\u4e3a\u5ba2\u6237\u7aef\u5206\u914d\u6216\u534f\u5546&#xff1a;<\/p>\n<p>IP\u5730\u5740<\/p>\n<p>\u5b50\u7f51\u63a9\u7801<\/p>\n<p>\u7f51\u5173<\/p>\n<p>DNS\u670d\u52a1\u5668\u5730\u5740<\/p>\n<p>\u7b49\u7f51\u7edc\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n<h3>16.4 BOOTP<\/h3>\n<p>BOOTP\u5168\u79f0&#xff1a;<\/p>\n<p>Bootstrap Protocol<\/p>\n<p>\u662f\u4e00\u79cd\u7528\u4e8e\u7f51\u7edc\u542f\u52a8\u914d\u7f6e\u7684\u534f\u8bae\u3002<\/p>\n<p>\u5b83\u4e0e\u65e9\u671f\u7684\u7f51\u7edc\u542f\u52a8\u3001\u65e0\u76d8\u8bbe\u5907\u7b49\u573a\u666f\u6709\u5173\u3002<\/p>\n<h3>16.5 DNS<\/h3>\n<p>DNS\u5168\u79f0&#xff1a;<\/p>\n<p>Domain Name System<\/p>\n<p>\u5373&#xff1a;<\/p>\n<p>\u57df\u540d\u7cfb\u7edf<\/p>\n<p>\u4f8b\u5982\u5c06&#xff1a;<\/p>\n<p>www.example.com<\/p>\n<p>\u89e3\u6790\u4e3a\u76f8\u5e94IP\u5730\u5740\u3002<\/p>\n<p>DNS\u65e2\u53ef\u4ee5\u4f7f\u7528UDP&#xff0c;\u4e5f\u53ef\u4ee5\u4f7f\u7528TCP\u3002<\/p>\n<p>\u56e0\u6b64\u4e0d\u80fd\u7b80\u5355\u8ba4\u4e3a&#xff1a;<\/p>\n<p>DNS\u53ea\u80fd\u4f7f\u7528UDP<\/p>\n<h3>16.6 \u81ea\u5b9a\u4e49UDP\u5e94\u7528\u5c42\u534f\u8bae<\/h3>\n<p>\u9664\u4e86\u8fd9\u4e9b\u5df2\u6709\u534f\u8bae&#xff0c;\u6211\u4eec\u81ea\u5df1\u7f16\u5199UDP\u7a0b\u5e8f\u65f6&#xff0c;\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u5e94\u7528\u5c42\u89c4\u5219\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aef\u53d1\u9001hello<\/p>\n<p>\u670d\u52a1\u5668\u8fd4\u56deserver echo# hello<\/p>\n<p>\u8fd9\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684UDP\u56de\u663e\u4e1a\u52a1\u7ea6\u5b9a\u3002<\/p>\n<p>\u63a5\u4e0b\u6765&#xff0c;\u6211\u4eec\u4f7f\u7528Linux Socket\u7f16\u7a0b\u5b8c\u6574\u5b9e\u73b0\u5b83\u3002<\/p>\n<hr \/>\n<h2>\u5341\u4e03\u3001\u603b\u7ed3<\/h2>\n<p>\u672c\u6587\u9996\u5148\u4ece\u4f20\u8f93\u5c42\u7684\u804c\u8d23\u51fa\u53d1&#xff0c;\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u4e00\u53f0\u4e3b\u673a\u4e0a\u7684\u591a\u4e2a\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4f7f\u7528\u7aef\u53e3\u53f7\u533a\u5206\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n<p>\u968f\u540e\u5b66\u4e60\u4e86&#xff1a;<\/p>\n<p>\u6e90IP<\/p>\n<p>\u6e90\u7aef\u53e3<\/p>\n<p>\u76ee\u7684IP<\/p>\n<p>\u76ee\u7684\u7aef\u53e3<\/p>\n<p>\u534f\u8bae\u53f7<\/p>\n<p>\u6784\u6210\u7684\u901a\u4fe1\u4e94\u5143\u7ec4\u3002<\/p>\n<p>\u5e76\u8ba4\u8bc6&#xff1a;<\/p>\n<p>\u77e5\u540d\u7aef\u53e3<\/p>\n<p>\u7aef\u53e3\u8303\u56f4<\/p>\n<p>\u4e34\u65f6\u7aef\u53e3\u5206\u914d<\/p>\n<p>\u7aef\u53e3\u7ed1\u5b9a\u5173\u7cfb<\/p>\n<p>\u7b49\u57fa\u7840\u6982\u5ff5\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u6b63\u5f0f\u5206\u6790UDP\u56fa\u5b9a8\u5b57\u8282\u62a5\u5934&#xff1a;<\/p>\n<p>16\u4f4d\u6e90\u7aef\u53e3<\/p>\n<p>16\u4f4d\u76ee\u7684\u7aef\u53e3<\/p>\n<p>16\u4f4dUDP\u957f\u5ea6<\/p>\n<p>16\u4f4dUDP\u6821\u9a8c\u548c<\/p>\n<p>\u4ee5\u53caUDP\u7684\u4e09\u4e2a\u6838\u5fc3\u7279\u70b9&#xff1a;<\/p>\n<p>\u65e0\u8fde\u63a5\u3001\u4e0d\u53ef\u9760\u3001\u9762\u5411\u6570\u636e\u62a5\u3002<\/p>\n<p>\u5176\u4e2d\u6700\u9700\u8981\u638c\u63e1\u7684\u662f&#xff1a;<\/p>\n<p>UDP\u9762\u5411\u6570\u636e\u62a5&#xff0c;\u80fd\u591f\u4fdd\u7559\u5e94\u7528\u7a0b\u5e8f\u63d0\u4ea4\u7684\u6570\u636e\u62a5\u8fb9\u754c&#xff0c;\u4f46\u4e0d\u4fdd\u8bc1\u6570\u636e\u62a5\u4e00\u5b9a\u9001\u8fbe&#xff0c;\u4e5f\u4e0d\u4fdd\u8bc1\u6570\u636e\u62a5\u6309\u53d1\u9001\u987a\u5e8f\u5230\u8fbe\u3002<\/p>\n<p>\u968f\u540e\u5b66\u4e60\u4e86UDP\u63a5\u6536\u7f13\u51b2\u533a\u3001\u5168\u53cc\u5de5\u80fd\u529b\u548c\u5355\u6761\u6570\u636e\u62a5\u7684\u957f\u5ea6\u9650\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux\u7f51\u7edc\u7f16\u7a0b&#xff1a;\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae&#xff01;\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 &#x1f525; \u661f\u6052\u968f\u98ce&#xff1a;\u4e2a\u4eba\u4e3b\u9875\u2744\ufe0f \u4e2a\u4eba\u4e13\u680f&#xff1a;\u300aLinux\u7f51\u7edc\u7f16\u7a0b\u4ece0\u52301\u300b&#xff5c;\u300aC\u8bed\u8a00\u57fa\u7840\u300b&#xff5c;\u300a\u6570\u636e\u7ed3\u6784\u300b&#xff5c;\u300a\u673a\u5668\u5b66\u4e60\u5bfc\u8bba\u300b&#xff5c;\u300a\u524d\u7aef\u57fa\u7840\u300b&#xff5c; \u300apython\u57fa\u7840\u300b&#xff5c; \u300aC\u4ece\u5165\u95e8\u5230\u5165\u571f\u300b&#xff5c; \u300aLinux\u7684\u5b66\u4e60\u4e4b\u65c5\u300b \u2728 \u6570\u636e\u5373\u77e5\u8bc6&amp;<\/p>\n","protected":false},"author":2,"featured_media":122993,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,371,43,305,78],"topic":[],"class_list":["post-123001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-linux","tag-371","tag-43","tag-305","tag-78"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\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\/123001.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"Linux\u7f51\u7edc\u7f16\u7a0b&#xff1a;\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae&#xff01;\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 &#x1f525; \u661f\u6052\u968f\u98ce&#xff1a;\u4e2a\u4eba\u4e3b\u9875\u2744\ufe0f \u4e2a\u4eba\u4e13\u680f&#xff1a;\u300aLinux\u7f51\u7edc\u7f16\u7a0b\u4ece0\u52301\u300b&#xff5c;\u300aC\u8bed\u8a00\u57fa\u7840\u300b&#xff5c;\u300a\u6570\u636e\u7ed3\u6784\u300b&#xff5c;\u300a\u673a\u5668\u5b66\u4e60\u5bfc\u8bba\u300b&#xff5c;\u300a\u524d\u7aef\u57fa\u7840\u300b&#xff5c; \u300apython\u57fa\u7840\u300b&#xff5c; \u300aC\u4ece\u5165\u95e8\u5230\u5165\u571f\u300b&#xff5c; \u300aLinux\u7684\u5b66\u4e60\u4e4b\u65c5\u300b \u2728 \u6570\u636e\u5373\u77e5\u8bc6&amp;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/123001.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-05T22:17:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221735-6aed007f84ea2.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=\"9 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/123001.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/123001.html\",\"name\":\"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-11-05T22:17:48+00:00\",\"dateModified\":\"2026-11-05T22:17:48+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/123001.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/123001.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/123001.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\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":"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\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\/123001.html","og_locale":"zh_CN","og_type":"article","og_title":"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"Linux\u7f51\u7edc\u7f16\u7a0b&#xff1a;\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae&#xff01;\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 &#x1f525; \u661f\u6052\u968f\u98ce&#xff1a;\u4e2a\u4eba\u4e3b\u9875\u2744\ufe0f \u4e2a\u4eba\u4e13\u680f&#xff1a;\u300aLinux\u7f51\u7edc\u7f16\u7a0b\u4ece0\u52301\u300b&#xff5c;\u300aC\u8bed\u8a00\u57fa\u7840\u300b&#xff5c;\u300a\u6570\u636e\u7ed3\u6784\u300b&#xff5c;\u300a\u673a\u5668\u5b66\u4e60\u5bfc\u8bba\u300b&#xff5c;\u300a\u524d\u7aef\u57fa\u7840\u300b&#xff5c; \u300apython\u57fa\u7840\u300b&#xff5c; \u300aC\u4ece\u5165\u95e8\u5230\u5165\u571f\u300b&#xff5c; \u300aLinux\u7684\u5b66\u4e60\u4e4b\u65c5\u300b \u2728 \u6570\u636e\u5373\u77e5\u8bc6&amp;","og_url":"https:\/\/www.wsisp.com\/helps\/123001.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-11-05T22:17:48+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/11\/20261105221735-6aed007f84ea2.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"9 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/123001.html","url":"https:\/\/www.wsisp.com\/helps\/123001.html","name":"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-11-05T22:17:48+00:00","dateModified":"2026-11-05T22:17:48+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/123001.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/123001.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/123001.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"Linux\u7f51\u7edc\u7f16\u7a0b\uff1a\u5f7b\u5e95\u7406\u89e3UDP\u534f\u8bae\uff01\u4ece\u7aef\u53e3\u53f7\u3001\u4e94\u5143\u7ec4\u30018\u5b57\u8282\u62a5\u5934\u5230\u624b\u5199UDP\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\/123001","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=123001"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/123001\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/122993"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=123001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=123001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=123001"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=123001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}