获取ios设备的当前IP地址

目前项目中，项目要求所有发送到服务端的请求，要求把客户端的ip地址作为参数也发送过去。

IPAddress.h

//
//  ZFIPAddress.h
//  MyStudyDemo
//
//  Created by FranZhou on 16/6/23.
//  Copyright © 2016年 kimree. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface ZFIPAddress : NSObject

+(NSString*) getIpAddress;

+(NSString *)getIPAddress;

@end

　　

　　

IPAddress.m

//
//  ZFIPAddress.m
//  MyStudyDemo
//
//  Created by FranZhou on 16/6/23.
//  Copyright © 2016年 kimree. All rights reserved.
//

#import "ZFIPAddress.h"

// getIpAddress
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/ethernet.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <errno.h>
#include <net/if_dl.h>

// getIPAddress
#import <ifaddrs.h>
#import <arpa/inet.h>

#define min(a,b)    ((a) < (b) ? (a) : (b))
#define max(a,b)    ((a) > (b) ? (a) : (b))

#define BUFFERSIZE  4000
#define MAXADDRS  256

char *if_names[MAXADDRS];
char *ip_names[MAXADDRS];
char *hw_addrs[MAXADDRS];
unsigned long ip_addrs[MAXADDRS];
static int   nextAddr = 0;

@implementation ZFIPAddress

void InitAddresses()
{
    int i;
    for (i=0; i<MAXADDRS; ++i)
    {
        if_names[i] = ip_names[i] = hw_addrs[i] = NULL;
        ip_addrs[i] = 0;
    }
}

void FreeAddresses()
{
    int i;
    for (i=0; i<MAXADDRS; ++i)
    {
        if (if_names[i] != 0) free(if_names[i]);
        if (ip_names[i] != 0) free(ip_names[i]);
        if (hw_addrs[i] != 0) free(hw_addrs[i]);
        ip_addrs[i] = 0;
    }
    InitAddresses();
}

void GetIPAddresses()
{
    int                 i, len, flags;
    char                buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
    struct ifconf       ifc;
    struct ifreq        *ifr, ifrcopy;
    struct sockaddr_in  *sin;
    
    char temp[80];
    
    int sockfd;
    
    for (i=0; i<MAXADDRS; ++i)
    {
        if_names[i] = ip_names[i] = NULL;
        ip_addrs[i] = 0;
    }
    
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0)
    {
        perror("socket failed");
        return;
    }
    
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    
    if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0)
    {
        perror("ioctl error");
        return;
    }
    
    lastname[0] = 0;
    
    for (ptr = buffer; ptr < buffer + ifc.ifc_len; )
    {
        ifr = (struct ifreq *)ptr;
        len = max(sizeof(struct sockaddr), ifr->ifr_addr.sa_len);
        ptr += sizeof(ifr->ifr_name) + len;  // for next one in buffer
        
        if (ifr->ifr_addr.sa_family != AF_INET)
        {
            continue;   // ignore if not desired address family
        }
        
        if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL)
        {
            *cptr = 0;      // replace colon will null
        }
        
        if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0)
        {
            continue;   /* already processed this interface */
        }
        
        memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
        
        ifrcopy = *ifr;
        ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
        flags = ifrcopy.ifr_flags;
        if ((flags & IFF_UP) == 0)
        {
            continue;   // ignore if interface not up
        }
        
        if_names[nextAddr] = (char *)malloc(strlen(ifr->ifr_name)+1);
        if (if_names[nextAddr] == NULL)
        {
            return;
        }
        strcpy(if_names[nextAddr], ifr->ifr_name);
        
        sin = (struct sockaddr_in *)&ifr->ifr_addr;
        strcpy(temp, inet_ntoa(sin->sin_addr));
        
        ip_names[nextAddr] = (char *)malloc(strlen(temp)+1);
        if (ip_names[nextAddr] == NULL)
        {
            return;
        }
        strcpy(ip_names[nextAddr], temp);
        
        ip_addrs[nextAddr] = sin->sin_addr.s_addr;
        
        ++nextAddr;
    }
    
    close(sockfd);
}

void GetHWAddresses()
{
    struct ifconf ifc;
    struct ifreq *ifr;
    int i, sockfd;
    char buffer[BUFFERSIZE], *cp, *cplim;
    char temp[80];
    
    for (i=0; i<MAXADDRS; ++i)
    {
        hw_addrs[i] = NULL;
    }
    
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0)
    {
        perror("socket failed");
        return;
    }
    
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    
    if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0)
    {
        perror("ioctl error");
        close(sockfd);
        return;
    }
    
    ifr = ifc.ifc_req;
    
    cplim = buffer + ifc.ifc_len;
    
    for (cp=buffer; cp < cplim; )
    {
        ifr = (struct ifreq *)cp;
        if (ifr->ifr_addr.sa_family == AF_LINK)
        {
            struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr;
            int a,b,c,d,e,f;
            int i;
            
            strcpy(temp, (char *)ether_ntoa((const struct ether_addr*)LLADDR(sdl)));
            sscanf(temp, "%x:%x:%x:%x:%x:%x", &a, &b, &c, &d, &e, &f);
            sprintf(temp, "%02X:%02X:%02X:%02X:%02X:%02X",a,b,c,d,e,f);
            
            for (i=0; i<MAXADDRS; ++i)
            {
                if ((if_names[i] != NULL) && (strcmp(ifr->ifr_name, if_names[i]) == 0))
                {
                    if (hw_addrs[i] == NULL)
                    {
                        hw_addrs[i] = (char *)malloc(strlen(temp)+1);
                        strcpy(hw_addrs[i], temp);
                        break;
                    }
                }
            }
        }
        cp += sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len);
    }
    
    close(sockfd);
}

+(NSString*) getIpAddress
{
    InitAddresses();
    GetIPAddresses();
    NSString* ipAddress = [NSString stringWithFormat:@"%s", ip_names[1]];
    FreeAddresses();
    
    return ipAddress;
}


// Get IP Address
+(NSString *)getIPAddress {
    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;
    
}


@end

　　

swift实现方法如下：

//
//  ZFIPAddress.swift
//  MyStudyDemo
//
//  Created by FranZhou on 16/6/23.
//  Copyright © 2016年 kimree. All rights reserved.
//

import Foundation

/*
    桥接文件中需要包含以下内容
    #import <ifaddrs.h>
    #import <arpa/inet.h>
 */


public func getIPAddress() -> String?{
    var ipAddress: String? = nil
    
    var interfaces: UnsafeMutablePointer<ifaddrs> = nil
    var temp_addr: UnsafeMutablePointer<ifaddrs> = nil
    var success: Int32 = 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 != nil {
            if Int32(temp_addr.memory.ifa_addr.memory.sa_family) == AF_INET {
                // Check if interface is en0 which is the wifi connection on the iPhone
                let ifa_name = String(UTF8String: temp_addr.memory.ifa_name)
                if ifa_name != nil && ifa_name! == "en0" {
                    // Get NSString from C String
                    ipAddress = String(UTF8String: inet_ntoa((UnsafeMutablePointer<sockaddr_in>)(temp_addr.memory.ifa_addr).memory.sin_addr))
                }
            }
            
            // next point
            temp_addr = temp_addr.memory.ifa_next
        }
    }
    freeifaddrs(interfaces)
    
    return ipAddress
}