Macosx Setdns

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通过C语言接口在Mac App内部对系统的DNS配置进行修改。

Mac OS X设置DNS代码

示例代码setDNS.c内容如下：

#include <SystemConfiguration/SystemConfiguration.h>static bool setDNS(CFStringRef *resolvers, CFIndex resolvers_count){    SCDynamicStoreRef ds = SCDynamicStoreCreate(NULL, CFSTR("setDNS"), NULL, NULL);    CFArrayRef array = CFArrayCreate(NULL, (const void **) resolvers,            resolvers_count, &kCFTypeArrayCallBacks);    CFDictionaryRef dict = CFDictionaryCreate(NULL,            (const void **) (CFStringRef []) { CFSTR("ServerAddresses") },            (const void **) &array, 1, &kCFTypeDictionaryKeyCallBacks,            &kCFTypeDictionaryValueCallBacks);        CFArrayRef list = SCDynamicStoreCopyKeyList(ds,            CFSTR("State:/Network/(Service/.+|Global)/DNS"));    CFIndex i = 0, j = CFArrayGetCount(list);    if (j <= 0) {        return FALSE;    }    bool ret = TRUE;    while (i < j) {        ret &= SCDynamicStoreSetValue(ds, CFArrayGetValueAtIndex(list, i), dict);        i++;    }    return ret;}int main(int argc, const char * argv[]){    CFStringRef resolvers[] = {        CFSTR("8.8.8.8"),        CFSTR("114.114.114.114")    };    setDNS(resolvers, (CFIndex) (sizeof resolvers / sizeof resolvers[0]));    return 0;}

对应的Makefile文件内容：

#!/usr/bin/make -fdefault: setDNS.c        cc -o setDNS setDNS.c -framework Foundation -framework SystemConfigurationclean:        rm setDNS

谢谢各位，欢迎交流并指正。

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