Pcap_DNSProxy 0.4.2 (new formula)

Closes Homebrew/homebrew#40381.

Signed-off-by: Xu Cheng <xucheng@me.com>

Formula/pcap_dnsproxy.rb

@@ -0,0 +1,65 @@
+class PcapDnsproxy < Formula
+  desc "A powerful DNS proxy designed to anti DNS spoofing"
+  homepage "https://github.com/chengr28/Pcap_DNSProxy"
+  url "https://github.com/chengr28/Pcap_DNSProxy/archive/v0.4.2.tar.gz"
+  sha256 "0737b16283e84bc94f63066f448ba84416141b8d5a86b5e01f1f97164d9d44f2"
+  head "https://github.com/chengr28/Pcap_DNSProxy.git"
+
+  depends_on :xcode => :build
+  depends_on "libsodium" => :build
+
+  def install
+    rm Dir[buildpath/"Source/LibSodium/*"]
+    ln_s "#{Formula["libsodium"].opt_lib}/libsodium.a", "#{buildpath}/Source/LibSodium/LibSodium_Mac.a"
+    ln_s Dir[Formula["libsodium"].opt_include/"*"], "#{buildpath}/Source/LibSodium/"
+    xcodebuild "-project", "./Source/KeyPairGenerator.xcodeproj", "-target", "KeyPairGenerator", "-configuration", "Release", "SYMROOT=build"
+    xcodebuild "-project", "./Source/Pcap_DNSProxy.xcodeproj", "-target", "Pcap_DNSProxy", "-configuration", "Release", "SYMROOT=build"
+
+    bin.install "Source/build/Release/KeyPairGenerator"
+    bin.install "Source/build/Release/Pcap_DNSProxy"
+    (etc/"pcap_DNSproxy").install Dir["Source/ExampleConfig/*.{ini,txt}"]
+  end
+
+  test do
+    mkdir testpath/"pcap_dnsproxy"
+    cp Dir[etc/"pcap_dnsproxy/*"], testpath/"pcap_dnsproxy/"
+    inreplace testpath/"pcap_dnsproxy/Config.ini" do |s|
+      s.gsub! /^Hosts Only.*/, "Hosts Only = 1"
+      s.gsub! /^Listen Port.*/, "Listen Port = 9999"
+    end
+    pid = fork { exec bin/"Pcap_DNSProxy", "-c", testpath/"pcap_dnsproxy/" }
+    begin
+      system "dig", "google.com", "@127.0.0.1", "-p", "9999", "+short"
+    ensure
+      Process.kill 9, pid
+      Process.wait pid
+    end
+  end
+
+  plist_options :startup => true, :manual => "sudo #{HOMEBREW_PREFIX}/opt/pcap_dnsproxy/bin/Pcap_DNSProxy -c #{HOMEBREW_PREFIX}/etc/pcap_dnsproxy/"
+
+  def plist; <<-EOS.undent
+    <?xml version="1.0" encoding="UTF-8"?>
+    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+    <plist version="1.0">
+      <dict>
+        <key>Label</key>
+        <string>#{plist_name}</string>
+        <key>ProgramArguments</key>
+        <array>
+          <string>#{opt_bin}/Pcap_DNSProxy</string>
+          <string>-c</string>
+          <string>#{etc}/pcap_dnsproxy/</string>
+        </array>
+        <key>RunAtLoad</key>
+        <true/>
+        <key>KeepAlive</key>
+        <dict>
+          <key>SuccessfulExit</key>
+          <false/>
+        </dict>
+      </dict>
+    </plist>
+    EOS
+  end
+end