取iphone本机ip地址方法(非调用私有api方法)

 私有方法：

 NSHost* myhost =[NSHost currentHost];
 NSString *ad = [myhost address];



 As far as I know there is only one hacky way to do that. You basically open a socket and get its address using POSIX functions. Here is the code I used for this:

 /*
  *  IPAdress.h
  *
  *
  */

 #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
  *
  */

 #include " IPAddress.h "

 #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 ) ;
 }





 Test:

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

 - ( void ) viewDidLoad {
      [ super viewDidLoad ] ;

      NSString * ip_iphone = [ self deviceIPAdress ] ;
    NSLog ( @ " ip:%@ " , ip_iphone ) ;
 }

Implicit declaration of function 'ether_ntoa' is invalid in C99

解决办法：http://stackoverflow.com/questions/11245280/implicit-declaration-of-function-ether-ntoa-is-invalid-in-c99

转自：http://blog.csdn.net/toddfox/article/details/5619890

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