擷取iphone的IP地址源碼

來源:互聯網
上載者:User

 定義了幾個方法,擷取iphone的IP地址。IPAdress.h[cpp]  #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();    IPAddress.c[c-sharp]  #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>    #include "GetAddresses.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);    }       如何用呢, 我們在MyAppAppDelegate.h中如下 [c-sharp]  #import <UIKit/UIKit.h>    @interface MyAppAppDelegate : NSObject <UIApplicationDelegate> {        NSString *localIP;    }    @property (nonatomic, retain) NSString *localIP;    - (NSString *)deviceIPAdress;    @end     MyAppDelegate.m[c-sharp]  - (void)applicationDidFinishLaunching:(UIApplication *)application {        self.localIP = [self deviceIPAdress];            ...    }    - (NSString *)deviceIPAdress {        InitAddresses();        GetIPAddresses();        GetHWAddresses();                    /*       int i;      NSString *deviceIP;      for (i=0; i<MAXADDRS; ++i)      {          static unsigned long localHost = 0x7F000001;        // 127.0.0.1          unsigned long theAddr;                    theAddr = ip_addrs[i];                    if (theAddr == 0) break;          if (theAddr == localHost) continue;                    NSLog(@"%s %s %s/n", if_names[i], hw_addrs[i], ip_names[i]);      }      deviceIP = [NSString stringWithFormat:@"%s", ip_names[i]];      */                    //this will get you the right IP from your device in format like 198.111.222.444. If you use the for loop above you will se that ip_names array will also contain localhost IP 127.0.0.1 that's why I don't use it. Eventualy this was code from mac that's why it uses arrays for ip_names as macs can have multiple IPs        return [NSString stringWithFormat:@"%s", ip_names[1]];    }    

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