| // Copyright 2019 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #import <Foundation/Foundation.h> |
| |
| #import "SystemConfiguration/CaptiveNetwork.h" |
| |
| #include <arpa/inet.h> |
| #include <ifaddrs.h> |
| |
| NSString* getWifiIP() { |
| NSString* address = @"error"; |
| 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; |
| } |