{"id":66,"date":"2023-07-06T09:18:00","date_gmt":"2023-07-06T01:18:00","guid":{"rendered":"https:\/\/xuebuwan.cn\/?p=66"},"modified":"2023-07-06T09:18:00","modified_gmt":"2023-07-06T01:18:00","slug":"c%e8%af%ad%e8%a8%80%e4%bb%8e%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%a0%a1%e9%aa%8cip%e5%90%88%e6%b3%95%e6%80%a7","status":"publish","type":"post","link":"https:\/\/xuebuwan.cn\/index.php\/2023\/07\/06\/c%e8%af%ad%e8%a8%80%e4%bb%8e%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%a0%a1%e9%aa%8cip%e5%90%88%e6%b3%95%e6%80%a7\/","title":{"rendered":"C\u8bed\u8a00\u4ece\u5b57\u7b26\u4e32\u6821\u9a8cIP\u5408\u6cd5\u6027"},"content":{"rendered":"<h1>C\u8bed\u8a00\u4ece\u5b57\u7b26\u4e32\u6821\u9a8cIP\u5408\u6cd5\u6027<\/h1>\n<p>\u9996\u5148\u62f7\u8d1d\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u4f7f\u7528strtok\u51fd\u6570\u6309&quot;.&quot;\u8fdb\u884c\u5206\u5272<\/p>\n<p>\u628a\u5206\u5272\u5b8c\u6210\u7684\u5b57\u7b26\u4f7f\u7528atoi\u51fd\u6570\u8f6c\u4e3a\u6574\u6570\uff0c\u7136\u540e\u5224\u65ad\u6570\u5b57\u5927\u5c0f\u662f\u5426\u57280-255\u533a\u95f4\u5185<\/p>\n<p>\u7531\u4e8eIP\u9996\u6bb5\u4e0d\u80fd\u4e3a0\uff0c\u6240\u4ee5\u6392\u9664\u9996\u6bb5\u4e3a0\u7684\u6570\u636e<\/p>\n<p>\u6700\u540e\u9a8c\u8bc1\u5206\u5272\u540e\u7684\u6bb5\u6570\u662f\u5426\u4e3a4\u6bb5<\/p>\n<pre><code class=\"language-c\">\/\/ \u68c0\u67e5ip\u5408\u6cd5\u6027\nint check_ip_set(const char *ip)\n{\n    if (ip == NULL)\n    {\n        return -1;\n    }\n\n    int seg_count = 0; \/\/ IP\u5730\u5740\u7684\u6bb5\u6570\n    int seg_value = 0; \/\/ \u5f53\u524d\u6bb5\u7684\u6570\u503c\n\n    \/\/ \u590d\u5236\u4e00\u4efdIP\u5730\u5740\u5b57\u7b26\u4e32\uff0c\u4ee5\u4fbf\u8fdb\u884c\u4fee\u6539\n    char ip_copy[16];\n    strcpy(ip_copy, ip);\n\n    \/\/ \u4f7f\u7528strtok\u51fd\u6570\u6309\u7167&#039;.&#039;\u5206\u5272IP\u5730\u5740\n    char *token = strtok(ip_copy, &quot;.&quot;);\n    while (token != NULL)\n    {\n        seg_count++;\n\n        \/\/ \u68c0\u67e5\u6bb5\u7684\u6570\u503c\u8303\u56f4\u662f\u5426\u5408\u6cd5\n        seg_value = atoi(token);\n        if (seg_value &lt; 0 || seg_value &gt; 255)\n        {\n            return -1;\n        }\n\n        \/\/ \u68c0\u67e5\u6bb5\u662f\u5426\u4ee50\u5f00\u5934\uff0c\u9664\u975e\u4e3a0\u672c\u8eab\n        if (seg_value != 0 &amp;&amp; token[0] == &#039;0&#039;)\n        {\n            return -1;\n        }\n\n        \/\/ \u83b7\u53d6\u4e0b\u4e00\u4e2a\u6bb5\n        token = strtok(NULL, &quot;.&quot;);\n    }\n\n    \/\/ IP\u5730\u5740\u5e94\u8be5\u67094\u4e2a\u6bb5\n    if (seg_count != 4)\n    {\n        return -1;\n    }\n    return 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>C\u8bed\u8a00\u4ece\u5b57\u7b26\u4e32\u6821\u9a8cIP\u5408\u6cd5\u6027 \u9996\u5148\u62f7\u8d1d\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u4f7f\u7528strtok\u51fd\u6570\u6309&quot;.&quot;\u8fdb\u884c\u5206\u5272 \u628a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[23,24],"class_list":["post-66","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-ip"],"_links":{"self":[{"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/posts\/66","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/comments?post=66"}],"version-history":[{"count":1,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/posts\/66\/revisions"}],"predecessor-version":[{"id":67,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/posts\/66\/revisions\/67"}],"wp:attachment":[{"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/media?parent=66"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/categories?post=66"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xuebuwan.cn\/index.php\/wp-json\/wp\/v2\/tags?post=66"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}