IPAddress.c

http://www.chrisandtennille.com/code/IPAddress.h

/* *  IPAddress.h *  PersonalProxy * *  Created by Chris Whiteford on 2009-02-20. *  Copyright 2009 __MyCompanyName__. All rights reserved. * */#define MAXADDRS32extern char *if_names[MAXADDRS];extern char *ip_names[MAXADDRS];extern char *hw_addrs[MAXADDRS];extern unsigned long ip_addrs[MAXADDRS];// Function prototypesvoid InitAddresses();void FreeAddresses();void GetIPAddresses();void GetHWAddresses();

http://www.chrisandtennille.com/code/IPAddress.c

/* *  IPAddress.c *  PersonalProxy * *  Created by Chris Whiteford on 2009-02-20. *  Copyright 2009 __MyCompanyName__. All rights reserved. * */#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 "IPAddress.h"#definemin(a,b)((a) < (b) ? (a) : (b))#definemax(a,b)((a) > (b) ? (a) : (b))#define BUFFERSIZE4000char *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 bufferif (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);}

GetIPAddresses();

    GetHWAddresses();

    

    for (int i=0; i<MAXADDRS; i++) {

        char *hwAddress = hw_addrs[i];

        char *ifName = if_names[i];

        char *ipName = ip_names[i];

        if (hwAddress != NULL) {

            NSLog(@"hwAddress -> %@", [NSString stringWithCString:hwAddress encoding:NSUTF8StringEncoding]);

        }

        if (ifName) {

            NSLog(@"ifName -> %@", [NSString stringWithCString:ifName encoding:NSUTF8StringEncoding]);

        }

        if (ipName) {

            NSLog(@"ipName -> %@", [NSString stringWithCString:ipName encoding:NSUTF8StringEncoding]);

        }        

    }