socket---sockaddr_in

#import <SystemConfiguration/SCNetworkReachability.h>

#import <netinet/in.h>

#import <sys/socket.h>

#import <arpa/inet.h>

NSString *strIp = @"192.168.10.38";

int iPort = 5443;

struct sockaddr_in myAddress;

bzero(&myAddress, sizeof(myAddress));

myAddress.sin_len = sizeof(myAddress);

myAddress.sin_family = AF_INET;

myAddress.sin_addr.s_addr = inet_addr([strIp UTF8String]);

myAddress.sin_port = htons(iPort);

    

SCNetworkReachabilityRef defaultRoute = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&myAddress);