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#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#ifndef SIOCGIFCONF /* whatever works */
#include <sys/sockio.h>
#endif
#include "hassalen.h"
#include "byte.h"
#include "ip.h"
#include "ipalloc.h"
#include "stralloc.h"
#include "ipme.h"
static int ipmeok = 0;
ipalloc ipme = {0};
int ipme_is(ip)
struct ip_address *ip;
{
int i;
if (ipme_init() != 1) return -1;
for (i = 0;i < ipme.len;++i)
if (byte_equal(&ipme.ix[i].ip,4,ip))
return 1;
return 0;
}
static stralloc buf = {0};
int ipme_init()
{
struct ifconf ifc;
char *x;
struct ifreq *ifr;
struct sockaddr_in *sin;
int len;
int s;
struct ip_mx ix;
if (ipmeok) return 1;
if (!ipalloc_readyplus(&ipme,0)) return 0;
ipme.len = 0;
ix.pref = 0;
/* 0.0.0.0 is a special address which always refers to
* "this host, this network", according to RFC 1122, Sec. 3.2.1.3a.
*/
byte_copy(&ix.ip,4,"\0\0\0\0");
if (!ipalloc_append(&ipme,&ix)) { return 0; }
if ((s = socket(AF_INET,SOCK_STREAM,0)) == -1) return -1;
len = 256;
for (;;) {
if (!stralloc_ready(&buf,len)) { close(s); return 0; }
buf.len = 0;
ifc.ifc_buf = buf.s;
ifc.ifc_len = len;
if (ioctl(s,SIOCGIFCONF,&ifc) >= 0) /* > is for System V */
if (ifc.ifc_len + sizeof(*ifr) + 64 < len) { /* what a stupid interface */
buf.len = ifc.ifc_len;
break;
}
if (len > 200000) { close(s); return -1; }
len += 100 + (len >> 2);
}
x = buf.s;
while (x < buf.s + buf.len) {
ifr = (struct ifreq *) x;
#ifdef HASSALEN
len = sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len;
if (len < sizeof(*ifr))
len = sizeof(*ifr);
if (ifr->ifr_addr.sa_family == AF_INET) {
sin = (struct sockaddr_in *) &ifr->ifr_addr;
byte_copy(&ix.ip,4,&sin->sin_addr);
if (ioctl(s,SIOCGIFFLAGS,x) == 0)
if (ifr->ifr_flags & IFF_UP)
if (!ipalloc_append(&ipme,&ix)) { close(s); return 0; }
}
#else
len = sizeof(*ifr);
if (ioctl(s,SIOCGIFFLAGS,x) == 0)
if (ifr->ifr_flags & IFF_UP)
if (ioctl(s,SIOCGIFADDR,x) == 0)
if (ifr->ifr_addr.sa_family == AF_INET) {
sin = (struct sockaddr_in *) &ifr->ifr_addr;
byte_copy(&ix.ip,4,&sin->sin_addr);
if (!ipalloc_append(&ipme,&ix)) { close(s); return 0; }
}
#endif
x += len;
}
close(s);
ipmeok = 1;
return 1;
}
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