{"id":1950,"date":"2020-08-02T13:14:00","date_gmt":"2020-08-02T05:14:00","guid":{"rendered":"https:\/\/xbtzone.com\/blog\/?p=1950"},"modified":"2020-08-02T22:16:16","modified_gmt":"2020-08-02T14:16:16","slug":"libpcap-note","status":"publish","type":"post","link":"https:\/\/xbtzone.com\/blog\/libpcap-note\/","title":{"rendered":"libpcap \u6293\u5305\u5b66\u4e60\u7b14\u8bb0"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\">\u5e8f<\/h4>\n\n\n\n<p>\u524d\u6bb5\u65f6\u95f4\u770b\u5230\u6709\u9879\u76ee\u9700\u6c42\u9700\u8981\u5728 Linux \u73af\u5883\u4e0b\u6293\u53d6\u7f51\u7edc\u5c01\u5305\u8fdb\u884c\u5206\u7ec4\u89e3\u6790\u3002\u56e0\u4e3a\u8fd8\u6ca1\u6709\u76f8\u5173\u7684\u7f51\u7edc\u7f16\u7a0b\u5f00\u53d1\u7ecf\u5386\uff0c\u56e0\u6b64\u501f\u6b64\u673a\u4f1a\u5b66\u4e60\u4e86 Linux \u4e0b\u4e00\u4e2a\u5f88\u5e38\u7528\u7684\u7f51\u7edc\u6293\u5305\u5e93 libpcap \u7684\u6293\u5305\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5f00\u53d1\u73af\u5883\u51c6\u5907<\/h4>\n\n\n\n<p>\u7b14\u8005\u7684\u5f00\u53d1\u73af\u5883\u662f Manjaro Linux\uff0c\u5176\u4f7f\u7528\u7684 KDE \u7248\u672c\u662f 5.18.5\u3002<\/p>\n\n\n\n<p>Manjaro Linux \u4f7f\u7528\u7684\u662f Arch Linux \u5185\u6838\uff0c\u8f7b\u91cf\u7ea7\u7684 Linux\u3002<\/p>\n\n\n\n<p>\u4e0d\u5f97\u4e0d\u8bf4 KDE \u7684\u684c\u9762\u5728 Manjaro Linux \u4e0b\u505a\u5f97\u5f88\u6f02\u4eae\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u9700\u8981\u4f7f\u7528\u5230 libpcap \u5e93\uff0c\u56e0\u6b64\u5728\u5f00\u53d1\u65f6\u8981\u786e\u4fdd\u7cfb\u7edf\u4e2d\u6709\u8fd9\u4e2a\u5e93\uff0c\u5728 Manjaro Linux \u684c\u9762\u73af\u5883\u4e0b\u9ed8\u8ba4\u5df2\u7ecf\u5b89\u88c5\u597d\u4e86\u3002\u5982\u679c\u4e0d\u786e\u5b9a\uff0c\u53ef\u4ee5\u5728\u7ec8\u7aef\u6267\u884c\u8fd9\u6bb5\u547d\u4ee4\u5b89\u88c5\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo pacman -Sy libpcap<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u6293\u5305\u57fa\u672c\u8fc7\u7a0b<\/h4>\n\n\n\n<p>\u67e5\u9605 libpcap \u7684\u5b98\u65b9\u5f00\u53d1\u6587\u6863\uff0c\u53ef\u77e5 libpcap \u662f tcpdump \u9879\u76ee\u7684\u91cd\u8981\u6a21\u5757\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p>\u5b98\u65b9\u6587\u6863\u7ed9\u51fa\u4e86\u5f88\u8be6\u7ec6\u7684\u5b9e\u73b0\u7279\u5b9a\u7f51\u5361\u8bbe\u5907\u6293\u5305\u7684\u5b9e\u65bd\u65b9\u6848\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528 libpcap \u5e93\u65f6\uff0c\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u5305\u542b\u5176\u5934\u6587\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;pcap\/pcap.h><\/pre>\n\n\n\n<p>\u5728\u5f00\u59cb\u6293\u53d6\u67d0\u4e2a\u7f51\u5361\u7684\u5206\u7ec4\u7684\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u8981\u53d6\u5f97\u6307\u5b9a\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\u3002\u9700\u8981\u4f7f\u7528\u5230 pcap_create() \u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u6709\u4e24\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u9700\u8981\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u7684\u540d\u79f0\u7684\u5b57\u7b26\u4e32\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u7f13\u51b2\u533a\uff0c\u7528\u4e8e\u63a5\u6536\u51fd\u6570\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u9519\u8bef\u539f\u56e0\u3002\u5176\u8fd4\u56de\u503c\u4fbf\u662f\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\uff0c\u6253\u5f00\u8bbe\u5907\u5931\u8d25\u8fd4\u56de NULL\u3002<\/p>\n\n\n\n<p>\u901a\u5e38\u6765\u8bf4\uff0c\u7528\u6237\u8bbe\u5907\u4e0a\u7684\u7f51\u5361\u8bbe\u5907\u591a\u79cd\u591a\u6837\uff0c\u5bf9\u5e94\u7684\u8bbe\u5907\u540d\u79f0\u4e5f\u4e0d\u5c3d\u76f8\u540c\uff0c\u56e0\u6b64\u6211\u4eec\u5e94\u8be5\u6253\u5f00\u7528\u6237\u6700\u5e38\u7528\u7684\u7f51\u5361\u8bbe\u5907\uff08LAN \u548c WLAN \u7b49\uff09\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u83b7\u53d6\u8fd9\u4e9b\u7f51\u5361\u8bbe\u5907\u7684\u540d\u79f0\uff0c\u53ef\u4ee5\u501f\u52a9\u5230 libpcap \u7684 pcap_findalldevs() \u51fd\u6570\u6765\u67e5\u627e\u8bbe\u5907\u4e0a\u6240\u6709\u7684\u7f51\u5361\u8bbe\u5907\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u5e26\u6709\u4e24\u4e2a\u53c2\u6570\uff0c\u4e00\u4e2a\u662f\u7528\u4e8e\u63a5\u6536\u56de\u9988\u6765\u7684\u7f51\u5361\u8bbe\u5907\u94fe\u8868\u7ed3\u6784\u7684\u5934\u7ed3\u70b9\u6307\u9488\uff0c\u53e6\u4e00\u4e2a\u53c2\u6570\u7528\u4e8e\u63a5\u6536\u51fd\u6570\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u9519\u8bef\u4fe1\u606f\u3002\u8fd4\u56de\u503c\u4e3a0\u5219\u51fd\u6570\u6267\u884c\u6210\u529f\uff0c\u8fd4\u56de\u503c\u4e3a PCAP_ERROR \u5219\u51fd\u6570\u6267\u884c\u5931\u8d25\u3002<\/p>\n\n\n\n<ul><li><strong>\u6ce8\u610f\uff1a\u5373\u4f7f<strong>\u8bbe\u5907\u4e0a<\/strong>\u6ca1\u6709\u4efb\u4f55\u7f51\u5361\u8bbe\u5907\uff0c\u5b83\u4e5f\u540c\u6837\u8ba4\u4e3a\u6267\u884c\u6210\u529f\uff0c\u8fd4\u56de0\u3002<\/strong><\/li><\/ul>\n\n\n\n<p>\u5728\u6267\u884c\u5b8c pcap_findalldevs() \u540e\uff0c\u56e0\u4e3a\u751f\u6210\u7684\u8bbe\u5907\u94fe\u8868\u662f\u5728\u5806\u4e2d\u52a8\u6001\u5206\u914d\u5185\u5b58\u6765\u5b58\u653e\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u8fd8\u9700\u8981\u81ea\u884c\u8c03\u7528 pcap_freealldevs() \u51fd\u6570\u6765\u91ca\u653e\u94fe\u8868\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\uff0c\u7528\u4e8e\u6253\u5370\u51fa\u8bbe\u5907\u4e0a\u6240\u6709\u7f51\u5361\u8bbe\u5907\u540d\u79f0\u3002\u5728\u672c\u6587\u4e2d\uff0c\u4e3a\u83b7\u53d6\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\uff0c\u6211\u4eec\u53ea\u5173\u5fc3\u7f51\u5361\u8bbe\u5907\u7684\u540d\u79f0\uff0c\u56e0\u6b64\u7ed3\u70b9\u7ed3\u6784\u91cc\u5305\u542b\u7684\u5176\u4ed6\u4fe1\u606f\u6211\u4eec\u4e0d\u5173\u5fc3\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">void showNetworkDevice() {\n        char errbuf[PCAP_ERRBUF_SIZE];\n        pcap_if_t *head, *node;\n        pcap_findalldevs(&amp;head, errbuf);\n        \n        node = head;\n        while(node) {\n                printf(\"%s\\n\", node->name);\n                node = node->next;\n        }\n        \n        pcap_freealldevs(head);\n}<\/pre>\n\n\n\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0cshowNetworkDevice() \u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"304\" height=\"201\" src=\"https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_1.png\" alt=\"\" class=\"wp-image-1951\"\/><figcaption>\u8bbe\u5907\u4e0a\u7684\u7f51\u5361\u8bbe\u5907\u540d\u79f0\u5217\u8868<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u4e0a\u56fe\u4e2d\uff0c\u7b2c\u4e00\u4e2a\u8f93\u51fa\u7ed3\u679c\uff0c<strong>wlp0s18f2u3<\/strong>\uff0c\u4e5f\u5c31\u662f\u8bbe\u5907\u94fe\u8868\u7684\u5934\u7ed3\u70b9\u7684 name \u5c5e\u6027\uff0c\u5c31\u662f\u7b14\u8005\u8bbe\u5907\u7684 Wi-Fi \u7f51\u5361\u8bbe\u5907\u7684\u540d\u79f0\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u6253\u5f00\u8bbe\u5907\u83b7\u53d6 Wi-Fi \u8bbe\u5907\u53e5\u67c4\u7684\u65f6\u5019\u5c31\u53ef\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u8bbe\u5907\u540d\u79f0\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\uff0c\u7b14\u8005\u5728\u5b98\u7f51\u6587\u6863\u4e2d\u67e5\u9605\u5230\uff0c\u5728\u8f83\u8001\u7248\u672c\u7684 libpcap \u4e2d\uff0cpcap_findalldevs() \u51fd\u6570\u5e76\u4e0d\u5b58\u5728\uff0c\u800c\u662f\u501f\u52a9\u53e6\u4e00\u4e2a\u51fd\u6570 pcap_lookupdev() \u51fd\u6570\u6765\u83b7\u53d6\u300c\u7b2c\u4e00\u4e2a\u300d\u7f51\u5361\u8bbe\u5907\u7684\u540d\u79f0\u3002\u4f46\u8fd9\u4e2a\u51fd\u6570\u73b0\u5728\u5df2\u7ecf\u88ab\u5426\u51b3\uff0c\u4e3a\u4e86\u517c\u5bb9\u6027\u73b0\u5728\u4f9d\u7136\u53ef\u4ee5\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u8c03\u7528 pcap_create() \u51fd\u6570\u53d6\u5176\u8fd4\u56de\u503c\u83b7\u5f97\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\u540e\uff0c\u4e3a\u4e86\u80fd\u6fc0\u6d3b\u6293\u5305\u7a0b\u5e8f\uff0c\u8fd8\u9700\u8981\u8c03\u7528 pcap_activate() \u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u4e5f\u5c31\u662f\u521a\u624d\u5f97\u5230\u7684\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u3002<\/p>\n\n\n\n<p>\u6fc0\u6d3b\u6293\u5305\u7a0b\u5e8f\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5f00\u59cb\u76d1\u542c\u7f51\u5361\u8bbe\u5907\u5e76\u6293\u5305\u4e86\u3002<\/p>\n\n\n\n<p>\u6293\u5305\u9700\u8981\u8c03\u7528\u5230\u51fd\u6570 pcap_dispatch() \u51fd\u6570\uff0c\u5f53\u7136\u5b98\u7f51\u4e0a\u8fd8\u8bf4\u660e\u4e5f\u53ef\u4ee5\u4f7f\u7528 pcap_loop() \u51fd\u6570\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u53c2\u6570\u76f8\u540c\u5e76\u4e14\u4f5c\u7528\u7c7b\u4f3c\uff0c\u4f46\u524d\u8005\u8fd8\u53ef\u4ee5\u8bfb\u53d6\u63d0\u524d\u4fdd\u5b58\u5728\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u7684\u4e00\u7ec4\u5206\u7ec4\uff0c\u800c\u540e\u8005\u5219\u662f\u5faa\u73af\u6293\u5305\u76f4\u5230\u4e2d\u65ad\u6216\u8005\u9519\u8bef\u53d1\u751f\u3002\u7b14\u8005\u8fd9\u91cc\u4f7f\u7528 pcap_dispatch() \u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u67094\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u662f\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\uff1b\u7b2c\u4e8c\u4e2a\u662f\u8981\u6293\u53d6\u5206\u7ec4\u7684\u6570\u91cf\uff0c-1\u548c0\u90fd\u4ee3\u8868\u65e0\u9650\u6293\u5305\u76f4\u5230\u9519\u8bef\u53d1\u751f\u6216\u8005\u7a0b\u5e8f\u4e3b\u52a8\u8c03\u7528 pcap_breakloop() \u51fd\u6570\u8df3\u51fa\u6293\u5305\u4e8b\u52a1\uff1b\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u56de\u8c03\u51fd\u6570\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5728\u6293\u53d6\u7684\u5305\u7684\u6570\u91cf\u8fbe\u5230\u4e86\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u7684\u6570\u91cf\u65f6\uff0c\u56de\u8c03\u51fd\u6570\u4f1a\u88ab\u8c03\u7528\uff1b\u7b2c\u56db\u4e2a\u53c2\u6570\u662f\u7528\u6237\u53c2\u6570\uff0c\u8fd9\u4e2a\u53c2\u6570\u4f1a\u5728\u56de\u8c03\u51fd\u6570\u8c03\u7528\u65f6\u4f20\u9012\u7ed9\u56de\u8c03\u51fd\u6570\uff08\u65b9\u4fbf\u5728\u5f00\u53d1\u65f6\u505a\u4e0a\u4e0b\u6587\u540c\u6b65\uff09\u3002\u8fd9\u4e2a\u51fd\u6570\u82e5\u6267\u884c\u6210\u529f\u4f1a\u8fd4\u56de0\uff0c\u5426\u5219\u8fd4\u56de PCAP_ERROR\u3002<\/p>\n\n\n\n<ul><li><strong>\u6ce8\u610f\uff1a\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u53ea\u6709\u5728\u6293\u53d6\u7684\u5206\u7ec4\u8fbe\u5230\u7279\u5b9a\u7684\u6570\u91cf\u65f6\uff0c\u56de\u8c03\u51fd\u6570\u624d\u4f1a\u88ab\u8c03\u7528\uff0c\u6b64\u65f6\u6709\u591a\u5c11\u4e2a\u5206\u7ec4\u5c31\u8c03\u7528\u591a\u5c11\u6b21\u56de\u8c03\u51fd\u6570\uff0c\u4f46\u5e76\u4e0d\u662f\u6bcf\u6293\u5230\u4e00\u4e2a\u5206\u7ec4\u5c31\u7acb\u5373\u8c03\u7528\u4e00\u6b21\u56de\u8c03\u51fd\u6570\u3002<\/strong><\/li><\/ul>\n\n\n\n<p>\u56de\u8c03\u51fd\u6570\u7684\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">void callback(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes) <\/pre>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a\u7a7a\u8fd4\u56de\u503c\u7684\u51fd\u6570\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u7528\u6237\u53c2\u6570\uff0c\u4ece pcap_dispatch() \u51fd\u6570\u7684\u7b2c\u56db\u4e2a\u53c2\u6570\u4f20\u9012\u8fc7\u6765\uff1b\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u5206\u7ec4\u7684\u76f8\u5173\u4fe1\u606f\uff08\u5305\u542b\u6709\u5206\u7ec4\u6293\u53d6\u7684\u65f6\u95f4\uff0c\u5206\u7ec4\u6570\u636e\u957f\u5ea6\u7b49\uff09\uff1b\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u8fd9\u4e2a\u5206\u7ec4\u7684\u6570\u636e\u7684\u9996\u6570\u636e\u6307\u9488\uff0c\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u3002<\/p>\n\n\n\n<ul><li><strong>\u6ce8\u610f\uff1alibpcap \u6293\u53d6\u5230\u7684\u5206\u7ec4\u5747\u662f\u5904\u4e8e\u6570\u636e\u94fe\u8def\u5c42\u7684\u5206\u7ec4\uff0c\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u91cc\u79f0\u4e3a\u300c\u5e27\u300d(frame)\u3002<\/strong><\/li><\/ul>\n\n\n\n<p>\u5728\u6267\u884c pcap_dispatch() \u51fd\u6570\u540e\uff0c\u7a0b\u5e8f\u4f1a\u5904\u4e8e\u963b\u585e\u72b6\u6001\uff0c\u76f4\u5230\u8fbe\u5230\u4e86\u8981\u6293\u53d6\u7684\u5206\u7ec4\u6570\u91cf\u624d\u4f1a\u7ee7\u7eed\u3002\u5728\u6211\u4eec\u7684\u6293\u5305\u5de5\u4f5c\u5b8c\u6210\u540e\uff0c\u9700\u8981\u5173\u95ed\u7f51\u5361\u8bbe\u5907\uff0c\u9500\u6bc1\u521b\u5efa\u7684\u53e5\u67c4\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u5230 pcap_close() \u51fd\u6570\u3002\u53ea\u9700\u4f20\u5165\u7b2c\u4e00\u4e2a\u53c2\u6570\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\u5373\u53ef\u5173\u95ed\u8fd9\u4e2a\u8bbe\u5907\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662f\u7b80\u5355\u5229\u7528 libpcap \u5b9e\u73b0\u6293\u5305\u7684\u57fa\u672c\u8fc7\u7a0b\uff0c\u4e0b\u9762\u4ecb\u7ecd\u4e00\u4e9b\u8fdb\u9636\u6027\u7684\u7528\u6cd5\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u6293\u53d6\u6307\u5b9a\u7c7b\u578b\u7684\u5206\u7ec4<\/h4>\n\n\n\n<p>\u901a\u5e38\u6765\u8bf4\uff0c\u6293\u53d6\u6240\u6709\u7684\u7f51\u7edc\u5206\u7ec4\u800c\u4e0d\u8fdb\u884c\u4efb\u4f55\u7684\u5206\u7c7b\u548c\u8fc7\u6ee4\u662f\u4e0d\u7b26\u5408\u5b9e\u9645\u7684\uff0c\u56e0\u6b64\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u6211\u4eec\u5e38\u5e38\u4f1a\u9700\u8981\u8fc7\u6ee4\u6389\u4e00\u4e9b\u4e0d\u611f\u5174\u8da3\u7684\u5206\u7ec4\uff0c\u4fdd\u7559\u6211\u4eec\u9700\u8981\u5206\u6790\u7814\u7a76\u7684\u5206\u7ec4\u3002\u4e0b\u9762\u5c31\u4ee5\u6293\u53d6 HTTP \u660e\u6587\u534f\u8bae\uff08IPv4\uff09\u7684\u5206\u7ec4\u4e3a\u4f8b\u5728 libpcap \u4e2d\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u3002<\/p>\n\n\n\n<p>\u67e5\u9605\u5b98\u7f51\u6587\u6863\uff0c\u8bbe\u7f6e\u6293\u5305\u8fc7\u6ee4\u5668\u4e3b\u8981\u7528\u5230 pcap_compile() \u548c pcap_setfilter() \u51fd\u6570\u3002<\/p>\n\n\n\n<p>pcap_compile() \u51fd\u6570\u7528\u4e8e\u7f16\u8bd1\u751f\u6210\u4e00\u4e2a\u8fc7\u6ee4\u5668\u7ed3\u6784\uff0c\u7528\u4e8e\u4f20\u9012\u7ed9\u540e\u7eed\u8c03\u7528\u7684 pcap_setfilter() \u51fd\u6570\u3002\u5176\u4e00\u5171\u67095\u4e2a\u53c2\u6570\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\uff1b\u7b2c\u4e8c\u4e2a\u53c2\u6570\u7528\u4e8e\u63a5\u6536\u751f\u6210\u7684\u8fc7\u6ee4\u5668\u7ed3\u6784\u7684\u5bb9\u5668\u7684\u6307\u9488\uff1b\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u9700\u8981\u7f16\u8bd1\u751f\u6210\u7684\u8fc7\u6ee4\u5668\u7684\u4ee3\u7801\u5b57\u7b26\u4e32\uff1b\u7b2c\u56db\u4e2a\u53c2\u6570\u662f\u4f18\u5316\u63a7\u5236\u5f00\u5173\uff08\u6211\u4eec\u4f20\u51650\uff09\uff1b\u7b2c\u4e94\u4e2a\u53c2\u6570\u662f\u5b50\u7f51\u63a9\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u53c2\u6570\u6765\u6293\u53d6\u6307\u5b9a\u5b50\u7f51\u63a9\u7801\u7684\u5206\u7ec4\uff0c\u4f46\u5982\u679c\u4e0d\u5173\u5fc3\u8fd9\u4e2a\uff0c\u6211\u4eec\u53ef\u4ee5\u4f20\u5165 PCAP_NETMASK_UNKNOWN\uff0c\u6293\u53d6\u4efb\u610f\u5b50\u7f51\u63a9\u7801\u7684\u5206\u7ec4\u3002\u8fd9\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5982\u679c\u4e3a0\u5219\u6210\u529f\uff0c\u5426\u5219\u8fd4\u56de PCAP_ERROR\uff0c\u76f8\u5173\u7684\u9519\u8bef\u4fe1\u606f\u53ef\u4ee5\u4f7f\u7528 pcap_geterr() \u51fd\u6570\u548c pcap_perror() \u51fd\u6570\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u5728\u83b7\u5f97\u7f16\u8bd1\u6210\u529f\u7684\u8fc7\u6ee4\u5668\u7ed3\u6784\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f20\u5165\u5230 pcap_setfilter() \u51fd\u6570\u91cc\u3002\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u8bbe\u7f6e\u6307\u5b9a\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u5bf9\u5e94\u7684\u8fc7\u6ee4\u5668\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u4fbf\u662f\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u7684\u53e5\u67c4\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u8fc7\u6ee4\u5668\u7ed3\u6784\u7684\u6307\u9488\u3002\u8fd9\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5982\u679c\u4e3a0\u5219\u6210\u529f\uff0c\u5426\u5219\u8fd4\u56de PCAP_ERROR\uff0c\u76f8\u5173\u7684\u9519\u8bef\u4fe1\u606f\u53ef\u4ee5\u4f7f\u7528 pcap_geterr() \u51fd\u6570\u548c pcap_perror() \u51fd\u6570\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u5b98\u7f51\u6587\u6863\u4e2d\u5173\u4e8e\u8fc7\u6ee4\u5668\u4ee3\u7801\u7684\u4ecb\u7ecd\uff0c\u7b14\u8005\u4e0d\u52a0\u8be6\u8ff0\u3002\u7b14\u8005\u63a5\u4e0b\u6765\u501f\u7528\u5b98\u7f51\u7ed9\u51fa\u7684\u6293\u53d6 HTTP \u534f\u8bae\u8fc7\u6ee4\u5668\u4ee3\u7801\u8fdb\u884c\u6f14\u793a\u3002<\/p>\n\n\n\n<p>\u8fc7\u6ee4\u5668\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>tcp port 80 and (((ip&#91;2:2] - ((ip&#91;0]&amp;0xf)&lt;&lt;2)) - ((tcp&#91;12]&amp;0xf0)>>2)) != 0)<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8ff0\u8fc7\u6ee4\u5668\u4ee3\u7801\u53ef\u4ee5\u76f4\u63a5\u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u4f20\u5165\u5230 pcap_compile() \u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u91cc\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u4ee3\u7801\u7528\u4e8e\u7f16\u8bd1\u5e76\u4e3a\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">        int ret = pcap_compile(handler, &amp;fp, \"tcp port 80 and (((ip[2:2] - ((ip[0]&amp;0xf)&lt;&lt;2)) - ((tcp[12]&amp;0xf0)>>2)) != 0)\", 0, PCAP_NETMASK_UNKNOWN);\n        if (ret == PCAP_ERROR) {\n                printf(\"\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u5931\u8d25\uff0c\u9519\u8bef\u539f\u56e0\uff1a%s\\n\", pcap_geterr(handler));\n        }\n        pcap_setfilter(handler, &amp;fp);<\/pre>\n\n\n\n<p>\u5f53\u7136\uff0c\u5173\u4e8e\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u7684\u6700\u540e\uff0c\u5728\u6211\u4eec\u4e0d\u9700\u8981\u8fd9\u4e2a\u7f16\u8bd1\u751f\u6210\u7684\u8fc7\u6ee4\u5668\u65f6\uff0c\u9700\u8981\u5bf9\u8fd9\u4e2a\u7ed3\u6784\u8fdb\u884c\u91ca\u653e\u64cd\u4f5c\u3002\u8c03\u7528 pcap_freecode() \u51fd\u6570\u6765\u91ca\u653e\u8fc7\u6ee4\u5668\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5bfc\u51fa\u5206\u7ec4\u6570\u636e\u5230 pcap \u6587\u4ef6\u5e76\u4f7f\u7528 Wireshark \u5de5\u5177\u67e5\u770b<\/h4>\n\n\n\n<p>libpcap \u8fd8\u652f\u6301\u5206\u7ec4\u7684\u5bfc\u51fa\uff0c\u65b9\u4fbf\u6211\u4eec\u5bf9\u5206\u7ec4\u7684\u8f6c\u5b58\u548c\u540e\u7eed\u501f\u52a9\u5916\u90e8\u5de5\u5177\u8fdb\u4e00\u6b65\u5206\u6790\u3002<\/p>\n\n\n\n<p>\u501f\u52a9 pcap_dump() \u51fd\u6570\u5c31\u80fd\u5b9e\u73b0\u5206\u7ec4\u7684\u5bfc\u51fa\u3002<\/p>\n\n\n\n<p>\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u5f97\u5230\u5bfc\u51fa\u6587\u4ef6\u7684\u6587\u4ef6\u53e5\u67c4\u3002\u4f7f\u7528 pcap_dump_open() \u51fd\u6570\u6765\u6253\u5f00\u4e00\u4e2a\u5bfc\u51fa\u6587\u4ef6\u53e5\u67c4\u3002\u5411\u8fd9\u4e2a\u51fd\u6570\u4f20\u5165\u6253\u5f00\u7684\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u548c\u6587\u4ef6\u540d\u5373\u53ef\uff0c\u5176\u8fd4\u56de\u503c\u4fbf\u662f\u5bfc\u51fa\u6587\u4ef6\u7684\u53e5\u67c4\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u524d\u6587\u63d0\u5230\u7684 pcap_dispatch() \u51fd\u6570\u8bbe\u7f6e\u7684\u56de\u8c03\u51fd\u6570\u91cc\uff0c\u8c03\u7528 pcap_dump() \u51fd\u6570\uff0c\u5411\u5bfc\u51fa\u6587\u4ef6\u5199\u5165\u6293\u53d6\u5230\u7684\u5206\u7ec4\u3002\u8fd9\u4e2a\u51fd\u6570\u6709\u4e09\u4e2a\u53c2\u6570\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u7528\u6237\u53c2\u6570\uff08\u53ef\u4ee5\u4f20\u5165\u524d\u9762\u6253\u5f00\u7684\u5bfc\u51fa\u6587\u4ef6\u53e5\u67c4\uff09\uff1b\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u5206\u7ec4\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u4f20\u5165\u56de\u8c03\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570 h\uff1b\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u5206\u7ec4\u7684\u9996\u6570\u636e\u6307\u9488\uff0c\u53ef\u4ee5\u4f20\u5165\u56de\u8c03\u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u5728\u5199\u5165\u5206\u7ec4\u6570\u636e\u5230\u5bfc\u51fa\u6587\u4ef6\u540e\uff0c\u63a8\u8350\u4f7f\u7528 pcap_dump_flush() \u51fd\u6570\u5237\u65b0\u5bfc\u51fa\u6587\u4ef6\u3002\u5bfc\u51fa\u5de5\u4f5c\u5b8c\u6210\u540e\uff0c\u8fd8\u8981\u8bb0\u5f97\u8c03\u7528 pcap_dump_close() \u51fd\u6570\u6765\u5173\u95ed\u6253\u5f00\u7684\u5bfc\u51fa\u6587\u4ef6\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u4ee5\u6293\u53d6 HTTP \u660e\u6587\u534f\u8bae\u4e3a\u4f8b\uff0c\u53d6\u5f97\u5206\u7ec4\u7684\u6e90 IP \u5730\u5740\u548c\u76ee\u7684 IP \u5730\u5740\uff0c\u5e76\u5bfc\u51fa\u5206\u7ec4\u6570\u636e\u5230\u6587\u4ef6\uff0c\u6700\u540e\u501f\u52a9 Wireshark \u5de5\u5177\u67e5\u770b\u5206\u7ec4\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;stdio.h>\n#include &lt;pcap\/pcap.h>\n#include &lt;arpa\/inet.h>\n\npcap_t *handler;\npcap_dumper_t *pcap_dumper;\n\ntypedef struct {\n        unsigned char header_len:4;\n        unsigned char version:4;\n        unsigned char tos:8;\n        unsigned short total_len;\n        unsigned short ident;\n        unsigned short flags;\n        unsigned char ttl:8;\n        unsigned char proto:8;\n        unsigned short checksum;\n        unsigned int src_ip;\n        unsigned int dest_ip;\n} ip_header;\n\nvoid callback(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes) {\n        ip_header *t = (ip_header *)(bytes+14);\n        struct in_addr src_addr;\n        struct in_addr dest_addr;\n        char src[INET_ADDRSTRLEN];\n        char dest[INET_ADDRSTRLEN];\n\n        src_addr.s_addr = (in_addr_t)(t->src_ip);\n        inet_ntop(AF_INET, &amp;src_addr.s_addr, src, sizeof(src));\n\n        dest_addr.s_addr = (in_addr_t)(t->dest_ip);\n        inet_ntop(AF_INET, &amp;dest_addr.s_addr, dest, sizeof(dest));\n\n        printf(\"src:%s -> dest:%s\\n\", \n                src,\n                dest);\n\n        pcap_dump((u_char *)pcap_dumper, h, bytes);\n        pcap_dump_flush(pcap_dumper);\n}\n\nint main() {\n        char* dev;\n        char errbuf[PCAP_ERRBUF_SIZE];\n        struct bpf_program fp;\n        int ret;\n\n        dev = pcap_lookupdev(errbuf);\n        handler = pcap_create(dev, errbuf);\n        if (!handler) {\n                printf(\"\u6253\u5f00\u7f51\u5361\u8bbe\u5907\u53e5\u67c4\u5931\u8d25\uff0c\u9519\u8bef\u539f\u56e0\uff1a%s\\n\", errbuf);\n                return 0;\n        }\n        pcap_activate(handler);\n\n        ret = pcap_compile(handler, \n                &amp;fp, \n                \"tcp port 80 and (((ip[2:2] - ((ip[0]&amp;0xf)&lt;&lt;2)) - ((tcp[12]&amp;0xf0)>>2)) != 0)\", \n                0, \n                PCAP_NETMASK_UNKNOWN);\n        if (ret == PCAP_ERROR) {\n                printf(\"\u7f16\u8bd1\u8fc7\u6ee4\u5668\u5931\u8d25\uff0c\u9519\u8bef\u539f\u56e0\uff1a%s\\n\", pcap_geterr(handler));\n        }\n        pcap_setfilter(handler, &amp;fp);\n\n        pcap_dumper = pcap_dump_open(handler, \"mypack.pcap\");\n\n        ret = pcap_dispatch(handler, 2, callback, NULL);\n        if (ret == PCAP_ERROR) {\n                printf(\"\u6293\u5305\u5931\u8d25\uff0c\u9519\u8bef\u539f\u56e0\uff1a%s\\n\", pcap_geterr(handler));\n        }\n\n        pcap_dump_close(pcap_dumper);\n        pcap_freecode(&amp;fp);\n        pcap_close(handler);\n        return 0;\n}<\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u4ee3\u7801\u5728\u7f16\u8bd1\u65f6\uff0c\u5982\u679c\u4f7f\u7528\u7684\u662f GCC \u7f16\u8bd1\u5668\uff0c\u9700\u8981\u5728\u547d\u4ee4\u884c\u4e0a\u52a0\u5165\u4efb\u9009\u9879 -lpcap\uff0c\u8bf4\u660e\u7a0b\u5e8f\u9700\u8981\u5bfc\u5165 libpcap \u5e93\u6765\u7f16\u8bd1\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">gcc pack.c -o pack -lpcap<\/pre>\n\n\n\n<p>\u7a0b\u5e8f\u4e3a\u4e86\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u9700\u8981\u7ba1\u7406\u5458\u6743\u9650\uff0c\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u6ce8\u610f\u52a0\u4e0a sudo\uff0c\u6216\u8005\u76f4\u63a5\u4ee5 root \u7528\u6237\u6765\u8fd0\u884c\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo .\/pack<\/pre>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"617\" height=\"290\" src=\"https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_2.png\" alt=\"\" class=\"wp-image-1967\"\/><figcaption>\u7f16\u8bd1\u548c\u8fd0\u884c\u7ed3\u679c<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5b9e\u73b0\u7684\u662f\uff0c\u8fc7\u6ee4\u5e76\u4fdd\u7559 HTTP \u534f\u8bae\u7684\u5206\u7ec4\uff0c\u6293\u53d6\u5176\u4e2d\u524d2\u4e2a\u5206\u7ec4\u3002\u5982\u56fe\u6240\u793a\uff0c\u6267\u884c\u7a0b\u5e8f\u540e\uff0c\u7a0b\u5e8f\u4f1a\u963b\u585e\u4e8e\u6b64\uff0c\u56e0\u4e3a\u53ea\u6709\u7a0b\u5e8f\u6210\u529f\u6293\u53d62\u4e2a\u6211\u4eec\u8981\u6c42\u7684\u5206\u7ec4\u540e\uff0c\u7a0b\u5e8f\u624d\u4f1a\u6062\u590d\u6267\u884c\u3002\u4e0b\u9762\u6211\u4eec\u4ee5\u300c\u65e0\u75d5\u6d4f\u89c8\u6a21\u5f0f\u300d\u5728\u6d4f\u89c8\u5668\u4e2d\u8bbf\u95ee\u8fd9\u6bb5\u7f51\u5740\uff0c\u89c2\u5bdf\u7ec8\u7aef\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n\n\n\n<p><a href=\"http:\/\/gaia.cs.umass.edu\/wireshark-labs\/HTTP-wireshark-file1.html\">http:\/\/gaia.cs.umass.edu\/wireshark-labs\/HTTP-wireshark-file1.html<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"337\" height=\"81\" src=\"https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_3.png\" alt=\"\" class=\"wp-image-1969\"\/><figcaption>\u7ec8\u7aef\u8f93\u51fa\u7ed3\u679c<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u6211\u4eec\u5728\u7ec8\u7aef\u91cc\u770b\u5230\u4e86\u4e24\u6761\u8f93\u51fa\uff0c\u4e24\u6761\u8f93\u51fa\u4e2d\u7684\u7b2c\u4e00\u6761\u663e\u793a\u7b2c\u4e00\u4e2a\u5206\u7ec4\u662f\u4ece IP 192.168.0.101 \u53d1\u9001\u81f3 IP 128.119.245.12\uff1b\u7b2c\u4e8c\u6761\u663e\u793a\u7b2c\u4e8c\u4e2a\u5206\u7ec4\u662f\u4ece IP 128.119.245.12 \u53d1\u9001\u81f3 IP 192.168.0.101\u3002<\/p>\n\n\n\n<p>\u4ece\u56fe\u4e2d\u6211\u4eec\u53ef\u77e5\uff0c\u6211\u4eec\u6210\u529f\u6293\u53d6\u5230\u4e24\u4e2a\u5206\u7ec4\uff0c\u5e76\u5bf9\u8fd9\u4e24\u4e2a\u5206\u7ec4\u8fdb\u884c\u7b80\u5355\u7684\u89e3\u6790\uff0c\u83b7\u53d6\u5e76\u663e\u793a\u51fa\u5b83\u4eec\u7684\u6e90 IP \u5730\u5740\u548c\u76ee\u7684 IP \u5730\u5740\u3002<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u501f\u52a9 Wireshark \u5de5\u5177\u67e5\u770b\u5bfc\u51fa\u7684\u5206\u7ec4\u6570\u636e\u6587\u4ef6 mypack.pcap\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1090\" height=\"927\" src=\"https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_4.png\" alt=\"\" class=\"wp-image-1971\" srcset=\"https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_4.png 1090w, https:\/\/xbtzone.com\/blog\/wp-content\/uploads\/2020\/08\/pcap_4-768x653.png 768w\" sizes=\"(max-width: 1090px) 100vw, 1090px\" \/><figcaption>Wireshark \u67e5\u770b\u7ed3\u679c<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u6211\u4eec\u53ef\u4ee5\u5728 Wireshark \u76f4\u63a5\u6253\u5f00\u5bfc\u51fa\u7684\u5206\u7ec4\u6587\u4ef6 mypack.pcap\u3002Wireshark \u91cc\u663e\u793a\u4e86\u521a\u624d\u6293\u53d6\u5230\u7684\u4e24\u4e2a\u5206\u7ec4\u3002<\/p>\n\n\n\n<p>\u5229\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5bf9\u5bfc\u51fa\u7684\u5206\u7ec4\u8fdb\u4e00\u6b65\u67e5\u770b\u548c\u5206\u6790\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u540e\u8bb0<\/h4>\n\n\n\n<p>\u5728\u5448\u73b0\u672c\u6587\u7684\u6280\u672f\u8fc7\u7a0b\u4e2d\uff0c\u7b14\u8005\u8fd8\u5f97\u5230\u4e86\u4e00\u4e9b\u610f\u5916\u6536\u83b7\u3002<\/p>\n\n\n\n<p>\uff08\u6536\u83b7\u90fd\u662f\u5728\u8e29\u5751\u4e4b\u540e\u624d\u5f97\u5230\u7684\u561b\uff5e _(:3\u300d\u2220)_ \uff09<\/p>\n\n\n\n<p>\u4f7f\u7528 inet_ntoa() \u51fd\u6570\u6765\u8f6c\u6362 IP \u5730\u5740\u6570\u503c\u5230 IP \u5730\u5740\u5b57\u7b26\u4e32\u5b58\u5728\u4e00\u4e2a\u6613\u9519\u70b9\uff0c\u5c31\u662f\u5176\u8fd4\u56de\u503c\uff08IP \u5730\u5740\u5b57\u7b26\u4e32\u7684\u5730\u5740\uff09\u662f\u5b58\u653e\u5728\u9759\u6001\u53d8\u91cf\u5185\u7684\uff0c\u5728\u4e00\u4e2a\u8fc7\u7a0b\u4e2d\u4e0d\u80fd\u8fde\u7eed\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u5426\u5219\u540e\u9762\u5f97\u5230 IP \u5730\u5740\u7684\u5b57\u7b26\u4e32\u6c38\u8fdc\u53ea\u4f1a\u662f\u7b2c\u4e00\u4e2a\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u5f97\u5230\u7684 IP \u5730\u5740\u5b57\u7b26\u4e32\u3002\u56e0\u6b64\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u66f4\u63a8\u8350\u4f7f\u7528 inet_ntop() \u51fd\u6570\uff0c\u5b83\u4e0d\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898\uff0c\u5e76\u4e14\u8fd8\u652f\u6301 IPv6\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4ee5\u6293\u53d6 HTTP \u660e\u6587\u534f\u8bae\u5206\u7ec4\u4e3a\u4f8b\uff0c\u4f46\u73b0\u5982\u4eca\u5927\u90e8\u5206\u7f51\u7ad9\u5df2\u91c7\u7528\u66f4\u5b89\u5168\u7684 HTTPS \u52a0\u5bc6\u534f\u8bae\u6765\u901a\u4fe1\u3002\u5173\u4e8e\u5982\u4f55\u6293\u53d6\u5e76\u89e3\u6790 HTTPS \u534f\u8bae\u7684\u5206\u7ec4\uff0c\u5219\u662f\u53e6\u5916\u4e00\u4e2a\u503c\u5f97\u53bb\u6df1\u7a76\u7684\u8bfe\u9898\u4e86\u3002<\/p>\n\n\n\n<p>\u7f51\u7edc\u5c01\u5305\u7684\u6293\u53d6\u662f\u8ba1\u7b97\u673a\u7f51\u7edc\u9886\u57df\u7684\u4e00\u4e2a\u91cd\u8981\u8bfe\u9898\uff0c\u5728\u7f51\u7edc\u4fe1\u606f\u5927\u7206\u70b8\u7684\u4eca\u5929\uff0c\u6211\u4eec\u6709\u5fc5\u8981\u53bb\u4e86\u89e3\u5e76\u5b66\u4e60\u5176\u4e2d\u83b7\u53d6\u6570\u636e\u7684\u57fa\u672c\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5e8f \u524d\u6bb5\u65f6\u95f4\u770b\u5230\u6709\u9879\u76ee\u9700\u6c42\u9700\u8981\u5728 Linux \u73af\u5883\u4e0b\u6293\u53d6\u7f51\u7edc\u5c01\u5305\u8fdb\u884c\u5206\u7ec4\u89e3\u6790\u3002\u56e0\u4e3a\u8fd8\u6ca1\u6709\u76f8\u5173\u7684\u7f51\u7edc\u7f16 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/posts\/1950"}],"collection":[{"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/comments?post=1950"}],"version-history":[{"count":2,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/posts\/1950\/revisions"}],"predecessor-version":[{"id":1996,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/posts\/1950\/revisions\/1996"}],"wp:attachment":[{"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/media?parent=1950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/categories?post=1950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xbtzone.com\/blog\/wp-json\/wp\/v2\/tags?post=1950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}