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/*
** Copyright 2002 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "rfc1035.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SIOCGIFCONF
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/ioctl.h>
#include <net/if.h>
static int getifconf(int fd, struct rfc1035_ifconf **ifconf_ptr)
{
struct ifreq ifreq_buf[64];
struct ifconf ifc;
int i;
const struct sockaddr_in *sin;
RFC1035_ADDR addr;
char ipaddr[RFC1035_NTOABUFSIZE];
struct rfc1035_ifconf *ifcptr;
struct rfc1035_ifconf **ifconf;
ifc.ifc_len=sizeof(ifreq_buf);
ifc.ifc_req=ifreq_buf;
if (ioctl(fd, SIOCGIFCONF, &ifc) < 0)
return (0);
for (i=0; i * sizeof(struct ifreq) < ifc.ifc_len; i++)
{
sin=(const struct sockaddr_in *)&ifreq_buf[i].ifr_addr;
#if RFC1035_IPV6
if (sin->sin_family == AF_INET6)
{
struct sockaddr_in6 sin6;
memcpy(&sin6, sin, sizeof(sin6));
addr=sin6.sin6_addr;
}
else if (sin->sin_family == AF_INET)
rfc1035_ipv4to6(&addr, &sin->sin_addr);
else
continue;
#else
if (sin->sin_family == AF_INET)
addr=sin->sin_addr;
else
continue;
#endif
rfc1035_ntoa(&addr, ipaddr);
/*
** Eliminate any dupes.
*/
ifconf=ifconf_ptr;
while ( *ifconf )
{
char ipaddr2[RFC1035_NTOABUFSIZE];
rfc1035_ntoa(&(*ifconf)->ifaddr, ipaddr2);
if (strcmp(ipaddr, ipaddr2) == 0)
break;
ifconf= &(*ifconf)->next;
}
if ( *ifconf )
continue; /* Already have this IP addr */
if ( (ifcptr=malloc(sizeof(struct rfc1035_ifconf))) == NULL ||
(ifcptr->ifname=strdup(ifreq_buf[i].ifr_name)) == NULL)
{
if (ifcptr)
free(ifcptr);
return (-1);
}
ifcptr->ifaddr=addr;
ifcptr->next=NULL;
*ifconf= ifcptr;
}
return (0);
}
/*
** On systems that support IPv6, issue an SIOCGIFCONF on both an IPv4 and
** an IPv6 socket, for good measure.
*/
static int doifconf(struct rfc1035_ifconf **ifconf_list)
{
int fd;
fd=socket(PF_INET, SOCK_STREAM, 0);
if (fd >= 0)
{
if (getifconf(fd, ifconf_list))
{
close(fd);
return (-1);
}
close(fd);
}
#if RFC1035_IPV6
fd=socket(PF_INET6, SOCK_STREAM, 0);
if (fd >= 0)
{
if (getifconf(fd, ifconf_list))
{
close(fd);
return (-1);
}
close(fd);
}
#endif
return (0);
}
struct rfc1035_ifconf *rfc1035_ifconf(int *errflag)
{
struct rfc1035_ifconf *ifconf_list=NULL;
int dummy;
if (!errflag)
errflag= &dummy;
*errflag= -1;
if (doifconf(&ifconf_list))
{
rfc1035_ifconf_free(ifconf_list);
return (NULL);
}
*errflag=0;
return ifconf_list;
}
#else
struct rfc1035_ifconf *rfc1035_ifconf(int *errflag)
{
if (errflag)
*errflag=0;
return NULL;
}
#endif
void rfc1035_ifconf_free(struct rfc1035_ifconf *ifconf_list)
{
while (ifconf_list)
{
struct rfc1035_ifconf *p=ifconf_list->next;
free(ifconf_list->ifname);
free(ifconf_list);
ifconf_list=p;
}
}
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