获得手机的ip

貌似ASI里获取ip地址的链接不可以了。也曾试过whatismyip，在其网站上的截图获取的ip是正确的，单不知道为什么在我这里却是错误的。所以，在这里分享一下获得手机ip的方法。代码最初源自老外，通过系统提供的api获取的，这里我就直接贴代码了：

在创建的获得ip类的头文件里：

#define MAXADDRS    32

extern char *if_names[MAXADDRS];
extern char *ip_names[MAXADDRS];
extern char *hw_addrs[MAXADDRS];
extern unsigned long ip_addrs[MAXADDRS];

// Function prototypes

void InitAddresses();
void FreeAddresses();
void GetIPAddresses();
void GetHWAddresses();

实现文件里：

先导入文件

#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 <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>

具体实现的代码

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

#define BUFFERSIZE    4000

char *if_names[MAXADDRS];
char *ip_names[MAXADDRS];
char *hw_addrs[MAXADDRS];
unsigned long ip_addrs[MAXADDRS];

static int   nextAddr = 0;

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(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);
}

然后就是调用了，首先在我们的类里面导入上面那个类，之后在实现文件里写函数

- (NSString *)deviceIPAdress {
    InitAddresses();
    GetIPAddresses();
    GetHWAddresses();
    return [NSString stringWithFormat:@"%s", ip_names[1]];
}

然后在我们需要获得ip的地方写上

NSString* myip = [self deviceIPAdress];

这里的myip就是我们需要的ip地址了

手机截图

程序打印截图