missing files added

client/platforms/ios/ssconnectivity.h

@@ -0,0 +1,36 @@
+#ifndef ShadowsocksConnectivity_h
+#define ShadowsocksConnectivity_h
+
+#import <Foundation/Foundation.h>
+/**
+ * Non-thread-safe class to perform Shadowsocks connectivity checks.
+ */
+@interface ShadowsocksConnectivity : NSObject
+
+/**
+ * Initializes the object with a local Shadowsocks port, |shadowsocksPort|.
+ */
+- (id)initWithPort:(uint16_t)shadowsocksPort;
+
+/**
+ * Verifies that the server has enabled UDP forwarding. Performs an end-to-end test by sending
+ * a DNS request through the proxy. This method is a superset of |checkServerCredentials|, as its
+ * success implies that the server credentials are valid.
+ */
+- (void)isUdpForwardingEnabled:(void (^)(BOOL))completion;
+
+/**
+ * Verifies that the server credentials are valid. Performs an end-to-end authentication test
+ * by issuing an HTTP HEAD request to a target domain through the proxy.
+ */
+- (void)checkServerCredentials:(void (^)(BOOL))completion;
+
+/**
+ * Checks that the server is reachable on |host| and |port|.
+ */
+- (void)isReachable:(NSString *)host port:(uint16_t)port completion:(void (^)(BOOL))completion;
+
+@end
+
+#endif /* ShadowsocksConnectivity_h */
+