///////////////////////////////获取本机IP

#define MAXADDRS    32

 extern char *if_names[MAXADDRS];

extern char *ip_names[MAXADDRS];

extern char *hw_addrs[MAXADDRS];

externunsignedlong ip_addrs[MAXADDRS];

// Function prototypes

void InitAddresses();

void FreeAddresses();

void GetIPAddresses();

void GetHWAddresses();

 /*

 *  IPAddress.c

 *

 */

#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>

#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);

}

 ////////////////////////////////////////////////////////////

- (NSString *)deviceIPAdress {

    InitAddresses();

    GetIPAddresses();

    GetHWAddresses();

    return [NSStringstringWithFormat:@"%s", ip_names[1]];

}

- (void)viewDidLoad

{

　　NSString *phoneIP = [self deviceIPAdress];

　　NSLog("ip = %@", phoneIP);

}