{"id":382,"date":"2026-05-08T22:15:49","date_gmt":"2026-05-08T14:15:49","guid":{"rendered":"http:\/\/www.millscience.cn\/?p=382"},"modified":"2026-05-08T22:15:52","modified_gmt":"2026-05-08T14:15:52","slug":"analyzeip","status":"publish","type":"post","link":"https:\/\/www.millscience.cn\/index.php\/analyzeip\/","title":{"rendered":"\u89e3\u6790\u57df\u540d\u4e0b\u7684IP\u5730\u5740"},"content":{"rendered":"\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#D4D4D4;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#1E1E1E\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#D4D4D4;display:none\" aria-label=\"\u590d\u5236\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>#include &lt;stdio.h>\n#include &lt;string.h>\n#include &lt;sys\/socket.h>\n#include &lt;netdb.h>\n#include &lt;arpa\/inet.h>\n\nint main(int argc, char *argv[])\n{\n    if (argc != 2)\n    {\n        fprintf(stderr, \"Usage: %s &lt;domain>\\n\", argv&#91;0&#93;);\n        return 1;\n    }\n\n    struct addrinfo hints, *res, *p;\n    char ipstr&#91;INET6_ADDRSTRLEN&#93;;\n    int status;\n\n    memset(&amp;hints, 0, sizeof hints);\n    hints.ai_family = AF_UNSPEC;     \/\/ \u4e0d\u9650\u5236 IPv4 \u6216 IPv6\uff0c\u5168\u90e8\u8fd4\u56de\n    hints.ai_socktype = SOCK_STREAM; \/\/ \u901a\u5e38\u8bbe\u4e3a SOCK_STREAM\uff0c\u5bf9\u5730\u5740\u89e3\u6790\u4e0d\u5f71\u54cd\n\n    if ((status = getaddrinfo(argv&#91;1&#93;, NULL, &amp;hints, &amp;res)) != 0)\n    {\n        fprintf(stderr, \"getaddrinfo error: %s\\n\", gai_strerror(status));\n        return 1;\n    }\n\n    printf(\"IP addresses for %s:\\n\", argv&#91;1&#93;);\n    for (p = res; p != NULL; p = p->ai_next)\n    {\n        void *addr;\n        char *ipver;\n\n        if (p->ai_family == AF_INET)\n        { \/\/ IPv4\n            struct sockaddr_in *ipv4 = (struct sockaddr_in *)p->ai_addr;\n            addr = &amp;(ipv4->sin_addr);\n            ipver = \"IPv4\";\n        }\n        else\n        { \/\/ IPv6\n            struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)p->ai_addr;\n            addr = &amp;(ipv6->sin6_addr);\n            ipver = \"IPv6\";\n        }\n\n        inet_ntop(p->ai_family, addr, ipstr, sizeof ipstr);\n        printf(\"%s: %s\\n\", ipver, ipstr);\n    }\n\n    freeaddrinfo(res);\n    return 0;\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki dark-plus\" style=\"background-color: #1E1E1E\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #C586C0\">#include<\/span><span style=\"color: #569CD6\"> <\/span><span style=\"color: #CE9178\">&lt;stdio.h&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #C586C0\">#include<\/span><span style=\"color: #569CD6\"> <\/span><span style=\"color: #CE9178\">&lt;string.h&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #C586C0\">#include<\/span><span style=\"color: #569CD6\"> <\/span><span style=\"color: #CE9178\">&lt;sys\/socket.h&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #C586C0\">#include<\/span><span style=\"color: #569CD6\"> <\/span><span style=\"color: #CE9178\">&lt;netdb.h&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #C586C0\">#include<\/span><span style=\"color: #569CD6\"> <\/span><span style=\"color: #CE9178\">&lt;arpa\/inet.h&gt;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #569CD6\">int<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #DCDCAA\">main<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #569CD6\">int<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #9CDCFE\">argc<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #569CD6\">char<\/span><span style=\"color: #D4D4D4\"> *<\/span><span style=\"color: #9CDCFE\">argv<\/span><span style=\"color: #569CD6\">[]<\/span><span style=\"color: #D4D4D4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #C586C0\">if<\/span><span style=\"color: #D4D4D4\"> (argc != <\/span><span style=\"color: #B5CEA8\">2<\/span><span style=\"color: #D4D4D4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    {<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #DCDCAA\">fprintf<\/span><span style=\"color: #D4D4D4\">(stderr, <\/span><span style=\"color: #CE9178\">&quot;Usage: <\/span><span style=\"color: #9CDCFE\">%s<\/span><span style=\"color: #CE9178\"> &lt;domain&gt;<\/span><span style=\"color: #D7BA7D\">\\n<\/span><span style=\"color: #CE9178\">&quot;<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #9CDCFE\">argv<\/span><span style=\"color: #D4D4D4\">&#91;<\/span><span style=\"color: #B5CEA8\">0<\/span><span style=\"color: #D4D4D4\">&#93;);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #C586C0\">return<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #569CD6\">struct<\/span><span style=\"color: #D4D4D4\"> addrinfo hints, *res, *p;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #569CD6\">char<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #9CDCFE\">ipstr<\/span><span style=\"color: #D4D4D4\">&#91;INET6_ADDRSTRLEN&#93;;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #569CD6\">int<\/span><span style=\"color: #D4D4D4\"> status;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">memset<\/span><span style=\"color: #D4D4D4\">(&amp;hints, <\/span><span style=\"color: #B5CEA8\">0<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #569CD6\">sizeof<\/span><span style=\"color: #D4D4D4\"> hints);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #9CDCFE\">hints<\/span><span style=\"color: #D4D4D4\">.<\/span><span style=\"color: #9CDCFE\">ai_family<\/span><span style=\"color: #D4D4D4\"> = AF_UNSPEC;<\/span><span style=\"color: #6A9955\">     \/\/ \u4e0d\u9650\u5236 IPv4 \u6216 IPv6\uff0c\u5168\u90e8\u8fd4\u56de<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #9CDCFE\">hints<\/span><span style=\"color: #D4D4D4\">.<\/span><span style=\"color: #9CDCFE\">ai_socktype<\/span><span style=\"color: #D4D4D4\"> = SOCK_STREAM;<\/span><span style=\"color: #6A9955\"> \/\/ \u901a\u5e38\u8bbe\u4e3a SOCK_STREAM\uff0c\u5bf9\u5730\u5740\u89e3\u6790\u4e0d\u5f71\u54cd<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #C586C0\">if<\/span><span style=\"color: #D4D4D4\"> ((status = <\/span><span style=\"color: #DCDCAA\">getaddrinfo<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #9CDCFE\">argv<\/span><span style=\"color: #D4D4D4\">&#91;<\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">&#93;, <\/span><span style=\"color: #569CD6\">NULL<\/span><span style=\"color: #D4D4D4\">, &amp;hints, &amp;res)) != <\/span><span style=\"color: #B5CEA8\">0<\/span><span style=\"color: #D4D4D4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    {<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #DCDCAA\">fprintf<\/span><span style=\"color: #D4D4D4\">(stderr, <\/span><span style=\"color: #CE9178\">&quot;getaddrinfo error: <\/span><span style=\"color: #9CDCFE\">%s<\/span><span style=\"color: #D7BA7D\">\\n<\/span><span style=\"color: #CE9178\">&quot;<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #DCDCAA\">gai_strerror<\/span><span style=\"color: #D4D4D4\">(status));<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #C586C0\">return<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">printf<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #CE9178\">&quot;IP addresses for <\/span><span style=\"color: #9CDCFE\">%s<\/span><span style=\"color: #CE9178\">:<\/span><span style=\"color: #D7BA7D\">\\n<\/span><span style=\"color: #CE9178\">&quot;<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #9CDCFE\">argv<\/span><span style=\"color: #D4D4D4\">&#91;<\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">&#93;);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #C586C0\">for<\/span><span style=\"color: #D4D4D4\"> (p = res; p != <\/span><span style=\"color: #569CD6\">NULL<\/span><span style=\"color: #D4D4D4\">; p = <\/span><span style=\"color: #9CDCFE\">p<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">ai_next<\/span><span style=\"color: #D4D4D4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    {<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #569CD6\">void<\/span><span style=\"color: #D4D4D4\"> *addr;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #569CD6\">char<\/span><span style=\"color: #D4D4D4\"> *ipver;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #C586C0\">if<\/span><span style=\"color: #D4D4D4\"> (<\/span><span style=\"color: #9CDCFE\">p<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">ai_family<\/span><span style=\"color: #D4D4D4\"> == AF_INET)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        {<\/span><span style=\"color: #6A9955\"> \/\/ IPv4<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            <\/span><span style=\"color: #569CD6\">struct<\/span><span style=\"color: #D4D4D4\"> sockaddr_in *ipv4 = (<\/span><span style=\"color: #569CD6\">struct<\/span><span style=\"color: #D4D4D4\"> sockaddr_in *)<\/span><span style=\"color: #9CDCFE\">p<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">ai_addr<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            addr = &amp;(<\/span><span style=\"color: #9CDCFE\">ipv4<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">sin_addr<\/span><span style=\"color: #D4D4D4\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            ipver = <\/span><span style=\"color: #CE9178\">&quot;IPv4&quot;<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #C586C0\">else<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        {<\/span><span style=\"color: #6A9955\"> \/\/ IPv6<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            <\/span><span style=\"color: #569CD6\">struct<\/span><span style=\"color: #D4D4D4\"> sockaddr_in6 *ipv6 = (<\/span><span style=\"color: #569CD6\">struct<\/span><span style=\"color: #D4D4D4\"> sockaddr_in6 *)<\/span><span style=\"color: #9CDCFE\">p<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">ai_addr<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            addr = &amp;(<\/span><span style=\"color: #9CDCFE\">ipv6<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">sin6_addr<\/span><span style=\"color: #D4D4D4\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">            ipver = <\/span><span style=\"color: #CE9178\">&quot;IPv6&quot;<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #DCDCAA\">inet_ntop<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #9CDCFE\">p<\/span><span style=\"color: #D4D4D4\">-&gt;<\/span><span style=\"color: #9CDCFE\">ai_family<\/span><span style=\"color: #D4D4D4\">, addr, ipstr, <\/span><span style=\"color: #569CD6\">sizeof<\/span><span style=\"color: #D4D4D4\"> ipstr);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #DCDCAA\">printf<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #CE9178\">&quot;<\/span><span style=\"color: #9CDCFE\">%s<\/span><span style=\"color: #CE9178\">: <\/span><span style=\"color: #9CDCFE\">%s<\/span><span style=\"color: #D7BA7D\">\\n<\/span><span style=\"color: #CE9178\">&quot;<\/span><span style=\"color: #D4D4D4\">, ipver, ipstr);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">freeaddrinfo<\/span><span style=\"color: #D4D4D4\">(res);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #C586C0\">return<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">0<\/span><span style=\"color: #D4D4D4\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">}<\/span><\/span><\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":383,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,13],"tags":[],"class_list":["post-382","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-embedded","category-learning"],"_links":{"self":[{"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/posts\/382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/comments?post=382"}],"version-history":[{"count":1,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/posts\/382\/revisions"}],"predecessor-version":[{"id":384,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/posts\/382\/revisions\/384"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/media\/383"}],"wp:attachment":[{"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/media?parent=382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/categories?post=382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.millscience.cn\/index.php\/wp-json\/wp\/v2\/tags?post=382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}