回答編集履歴
2
回答内容に誤りがあったので修正しました
test
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@@ -1,4 +1,8 @@
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コードは以下でIPv4,IPv6共にDNSサーバ情報が取得できました。
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結局、サイトに乗っているままのコードでしたが、ライブラリの追加などが問題だと思います。
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配列は回した方が良いと思います。
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8
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@@ -24,23 +28,101 @@
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```swift3
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別クラスで実行
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// 現在のDNSを取得
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let
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let tesDns = Resolver()
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let curDnsArr = tesDns.getservers()
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let curDns1 = tesDns.getnameinfo(curDnsArr[0])
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let curDns2 = tesDns.getnameinfo(curDnsArr[1])
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print ( "DNS:" )
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print ( curDns1)
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print ( curDns2)
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}
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class Resolver {
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fileprivate var state = __res_9_state()
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public init() {
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res_9_ninit(&state)
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}
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deinit {
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res_9_ndestroy(&state)
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}
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public func getservers() -> [res_9_sockaddr_union] {
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let maxServers = 3
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var servers = [res_9_sockaddr_union](repeating: res_9_sockaddr_union(), count: maxServers)
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let found = Int(res_9_getservers(&state, &servers, Int32(maxServers)))
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// filter is to remove the erroneous empty entry when there's no real servers
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return Array(servers[0 ..< found]).filter() { $0.sin.sin_len > 0 }
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}
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public func getnameinfo(_ s: res_9_sockaddr_union) -> String {
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var s = s
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var hostBuffer = [CChar](repeating: 0, count: Int(NI_MAXHOST))
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let _ = withUnsafePointer(to: &s) {
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$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
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Darwin.getnameinfo($0, socklen_t(s.sin.sin_len),
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&hostBuffer, socklen_t(hostBuffer.count),
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nil, 0,
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NI_NUMERICHOST)
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}
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}
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return String(cString: hostBuffer)
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}
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}
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1
見やすくコード欄に記載
test
CHANGED
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@@ -12,11 +12,17 @@
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< プロジェクト名>-Bridging-Header.h
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```swift3
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#include <resolv.h>
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```
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●コード追加
|
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24
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+
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25
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+
```swift3
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20
26
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27
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let curDns = dnsServers()
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22
28
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@@ -37,3 +43,5 @@
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43
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return addresses
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39
45
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}
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```
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