DOUBLE_PRECISION getifreq_(INTEGER *dummy)
{
return (getifreq());
}
void ifget(int sockfd, enum mode mode, char *name)
{
char *buf,*ptr,*colon;
int len;
int l;
struct ifreq *ifr;
struct sockaddr_in *sa_in, *sin;
#ifdef HAVE_arpreq
struct arpreq arpreq;
#endif
#ifndef USE_IFALIAS
int cnt = 0;
#endif
buf = getifreq(sockfd, &len);
for(ptr=buf;ptr < buf+len;)
{
ifr=(struct ifreq *)ptr;
if (mode == IP)
{
sa_in=(struct sockaddr_in *)&ifr->ifr_addr;
if(strncmp(name,inet_ntoa(sa_in->sin_addr), IFNAMSIZ) == 0)
printf("%s\n",ifr->ifr_name);
#ifdef DEBUG
fprintf(stderr, "%s %s %s\n", name, inet_ntoa(sa_in->sin_addr), ifr->ifr_name);
#endif
}
else if (mode == IF)
{
/* This is rather questionable on linux and solaris */
/* It will probably go in later versions */
/* We return names of devices which are aliased. */
/* Under BSD this makes no sense so we fake it */
/* Note: the numbers under BSD are just placeholders */
#ifdef USE_IFALIAS
if((colon=memchr(ifr->ifr_name,':',strlen(ifr->ifr_name))) != NULL)
{
*colon='\0';
if(strncmp(name,ifr->ifr_name, IFNAMSIZ) == 0)
printf("%s\n",++colon);
}
#else
if(strncmp(name,ifr->ifr_name, IFNAMSIZ) == 0)
{
sa_in=(struct sockaddr_in *)&ifr->ifr_addr;
if (sa_in->sin_family == AF_INET)
{
if (cnt > 0)
{
printf("%d\n", cnt);
}
cnt++;
}
}
#endif
#ifdef DEBUG
fprintf(stderr, "%s %s\n", name, ifr->ifr_name);
#endif
}
else if (mode == HW)
{
if(strncmp(name,ifr->ifr_name, IFNAMSIZ) == 0)
{
#ifdef HAVE_sockaddr_dl
print_arp(LLADDR((struct sockaddr_dl *) &ifr->ifr_addr));
#elif defined(HAVE_SIOCGIFHWADDR)
if(ioctl(sockfd,SIOCGIFHWADDR,ifr) == 0)
{
print_arp(ifr->ifr_hwaddr.sa_data);
}
#elif defined(HAVE_arpreq)
memset(&arpreq, 0, sizeof(arpreq));
sin = ((struct sockaddr_in *) &arpreq.arp_pa);
memset(sin, 0, sizeof(*sin));
sa_in=(struct sockaddr_in *)&ifr->ifr_addr;
memcpy(&sin->sin_addr, &sa_in->sin_addr, sizeof(struct in_addr));
if(ioctl(sockfd,SIOCGARP,&arpreq) == 0)
{
print_arp(arpreq.arp_ha.sa_data);
}
#else
# error "Unable to work out hardware address"
#endif
break;
}
}
else
{
error(3, "Invalid mode");
}
#ifdef SA_LEN_IN_SOCKADDR
l = ifr->ifr_addr.sa_len + sizeof(ifr->ifr_name);
if (l < sizeof(*ifr))
l = sizeof(*ifr);
#else
l = sizeof(ifr->ifr_name)+sizeof(struct sockaddr);
#endif
ptr+=l;
}
free(buf);
}