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云代码 - ios代码库

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2012-08-28 作者： 神马举报

[ios]代码库

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#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); 
}


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