iOS获取WIFI的IP、子网掩码，以及域名转IP

获取WIFI需要的头文件：

#import "GetCurrentIP.h"

#import <ifaddrs.h>

#import <arpa/inet.h>

#import <SystemConfiguration/CaptiveNetwork.h>

#include <netdb.h>

#include <net/if.h>

#import <dlfcn.h>

#include <sys/socket.h>

#include <sys/sysctl.h>

获取所连wifi的IP的方法：

#pragma mark - 获取用户当前的IP地址

+ (nullable NSString*)getCurrentLocalIP

{

NSString *address = nil;

struct ifaddrs *interfaces = NULL;

struct ifaddrs *temp_addr = NULL;

int success = 0;

// retrieve the current interfaces - returns 0 on success

success = getifaddrs(&interfaces);

if (success == 0) {

// Loop through linked list of interfaces

temp_addr = interfaces;

while(temp_addr != NULL) {

if(temp_addr->ifa_addr->sa_family == AF_INET) {

// Check if interface is en0 which is the wifi connection on the iPhone

if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {

// Get NSString from C String

address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

}

}

temp_addr = temp_addr->ifa_next;

}

}

// Free memory

freeifaddrs(interfaces);

return address;

}

获取所连WIFI的详细信息：

+ (nullable NSString*)getCurrentWifiMessage {

NSString *address = nil;

struct ifaddrs *interfaces = NULL;

struct ifaddrs *temp_addr = NULL;

int success = 0;

// retrieve the current interfaces - returns 0 on success

success = getifaddrs(&interfaces);

if (success == 0)

{

// Loop through linked list of interfaces

temp_addr = interfaces;

while(temp_addr != NULL)

{

if(temp_addr->ifa_addr->sa_family == AF_INET)

{

// Check if interface is en0 which is the wifi connection on the iPhone

if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"])

address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];

//                    NSLog(@"子网掩码:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)]);

//                NSLog(@"本地IP:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)]);

//                NSLog(@"广播地址:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)]);

}

temp_addr = temp_addr->ifa_next;

}

}

// Free memory

freeifaddrs(interfaces);

return address;

}

域名转换成IP：

#pragma mark - 域名转成IP的方法

+ (NSString *)queryIpWithDomain:(NSString *)domain

{

struct hostent *hs;

struct sockaddr_in server;

if ((hs = gethostbyname([domain UTF8String])) != NULL)

{

server.sin_addr = *((struct in_addr*)hs->h_addr_list[0]);

return [NSString stringWithUTF8String:inet_ntoa(server.sin_addr)];

}

return @"1";

}