Unix SMB/CIFS implementation.
return a list of network interfaces
Copyright (C) Andrew Tridgell 1998
+ Copyright (C) Jeremy Allison 2007
+ Copyright (C) Jelmer Vernooij 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
*/
-#ifndef AUTOCONF_TEST
#include "includes.h"
-#endif
-
-#include <unistd.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <netdb.h>
-#include <sys/ioctl.h>
-#include <netdb.h>
-#include <sys/ioctl.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-
-#ifndef SIOCGIFCONF
-#ifdef HAVE_SYS_SOCKIO_H
-#include <sys/sockio.h>
-#endif
-#endif
-
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-
-#ifdef HAVE_STRINGS_H
-#include <strings.h>
-#endif
-
-#ifdef __COMPAR_FN_T
-#define QSORT_CAST (__compar_fn_t)
-#endif
-
-#ifndef QSORT_CAST
-#define QSORT_CAST (int (*)(const void *, const void *))
-#endif
-
-#ifdef HAVE_NET_IF_H
-#include <net/if.h>
-#endif
-
+#include "system/network.h"
#include "netif.h"
-
-#if HAVE_IFACE_IFCONF
-
-/* this works for Linux 2.2, Solaris 2.5, SunOS4, HPUX 10.20, OSF1
- V4.0, Ultrix 4.4, SCO Unix 3.2, IRIX 6.4 and FreeBSD 3.2.
-
- It probably also works on any BSD style system. */
+#include "lib/util/tsort.h"
/****************************************************************************
- get the netmask address for a local interface
+ Try the "standard" getifaddrs/freeifaddrs interfaces.
+ Also gets IPv6 interfaces.
****************************************************************************/
-static int _get_interfaces(struct iface_struct *ifaces, int max_interfaces)
-{
- struct ifconf ifc;
- char buff[8192];
- int fd, i, n;
- struct ifreq *ifr=NULL;
- int total = 0;
- struct in_addr ipaddr;
- struct in_addr nmask;
- char *iname;
-
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
- return -1;
- }
-
- ifc.ifc_len = sizeof(buff);
- ifc.ifc_buf = buff;
-
- if (ioctl(fd, SIOCGIFCONF, &ifc) != 0) {
- close(fd);
- return -1;
- }
-
- ifr = ifc.ifc_req;
-
- n = ifc.ifc_len / sizeof(struct ifreq);
-
- /* Loop through interfaces, looking for given IP address */
- for (i=n-1;i>=0 && total < max_interfaces;i--) {
- if (ioctl(fd, SIOCGIFADDR, &ifr[i]) != 0) {
- continue;
- }
-
- iname = ifr[i].ifr_name;
- ipaddr = (*(struct sockaddr_in *)&ifr[i].ifr_addr).sin_addr;
-
- if (ioctl(fd, SIOCGIFFLAGS, &ifr[i]) != 0) {
- continue;
- }
-
- if (!(ifr[i].ifr_flags & IFF_UP)) {
- continue;
- }
-
- if (ioctl(fd, SIOCGIFNETMASK, &ifr[i]) != 0) {
- continue;
- }
-
- nmask = ((struct sockaddr_in *)&ifr[i].ifr_addr)->sin_addr;
-
- strncpy(ifaces[total].name, iname, sizeof(ifaces[total].name)-1);
- ifaces[total].name[sizeof(ifaces[total].name)-1] = 0;
- ifaces[total].ip = ipaddr;
- ifaces[total].netmask = nmask;
- total++;
- }
-
- close(fd);
-
- return total;
-}
-
-#define _FOUND_IFACE_ANY
-#endif /* HAVE_IFACE_IFCONF */
-#ifdef HAVE_IFACE_IFREQ
-
-#ifndef I_STR
-#include <sys/stropts.h>
-#endif
/****************************************************************************
-this should cover most of the streams based systems
-Thanks to Andrej.Borsenkow@mow.siemens.ru for several ideas in this code
+ Get the netmask address for a local interface.
****************************************************************************/
+
static int _get_interfaces(struct iface_struct *ifaces, int max_interfaces)
{
- struct ifreq ifreq;
- struct strioctl strioctl;
- char buff[8192];
- int fd, i, n;
- struct ifreq *ifr=NULL;
+ struct ifaddrs *iflist = NULL;
+ struct ifaddrs *ifptr = NULL;
int total = 0;
- struct in_addr ipaddr;
- struct in_addr nmask;
- char *iname;
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
+ if (getifaddrs(&iflist) < 0) {
return -1;
}
-
- strioctl.ic_cmd = SIOCGIFCONF;
- strioctl.ic_dp = buff;
- strioctl.ic_len = sizeof(buff);
- if (ioctl(fd, I_STR, &strioctl) < 0) {
- close(fd);
- return -1;
- }
-
- /* we can ignore the possible sizeof(int) here as the resulting
- number of interface structures won't change */
- n = strioctl.ic_len / sizeof(struct ifreq);
- /* we will assume that the kernel returns the length as an int
- at the start of the buffer if the offered size is a
- multiple of the structure size plus an int */
- if (n*sizeof(struct ifreq) + sizeof(int) == strioctl.ic_len) {
- ifr = (struct ifreq *)(buff + sizeof(int));
- } else {
- ifr = (struct ifreq *)buff;
- }
+ /* Loop through interfaces, looking for given IP address */
+ for (ifptr = iflist, total = 0;
+ ifptr != NULL && total < max_interfaces;
+ ifptr = ifptr->ifa_next) {
- /* Loop through interfaces */
+ memset(&ifaces[total], '\0', sizeof(ifaces[total]));
- for (i = 0; i<n && total < max_interfaces; i++) {
- ifreq = ifr[i];
-
- strioctl.ic_cmd = SIOCGIFFLAGS;
- strioctl.ic_dp = (char *)&ifreq;
- strioctl.ic_len = sizeof(struct ifreq);
- if (ioctl(fd, I_STR, &strioctl) != 0) {
- continue;
- }
-
- if (!(ifreq.ifr_flags & IFF_UP)) {
+ if (!ifptr->ifa_addr || !ifptr->ifa_netmask) {
continue;
}
- strioctl.ic_cmd = SIOCGIFADDR;
- strioctl.ic_dp = (char *)&ifreq;
- strioctl.ic_len = sizeof(struct ifreq);
- if (ioctl(fd, I_STR, &strioctl) != 0) {
+ /* Check the interface is up. */
+ if (!(ifptr->ifa_flags & IFF_UP)) {
continue;
}
- ipaddr = (*(struct sockaddr_in *) &ifreq.ifr_addr).sin_addr;
- iname = ifreq.ifr_name;
-
- strioctl.ic_cmd = SIOCGIFNETMASK;
- strioctl.ic_dp = (char *)&ifreq;
- strioctl.ic_len = sizeof(struct ifreq);
- if (ioctl(fd, I_STR, &strioctl) != 0) {
+ /* We don't support IPv6 *yet* */
+ if (ifptr->ifa_addr->sa_family != AF_INET) {
continue;
}
- nmask = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr;
-
- strncpy(ifaces[total].name, iname, sizeof(ifaces[total].name)-1);
- ifaces[total].name[sizeof(ifaces[total].name)-1] = 0;
- ifaces[total].ip = ipaddr;
- ifaces[total].netmask = nmask;
+ ifaces[total].ip = ((struct sockaddr_in *)ifptr->ifa_addr)->sin_addr;
+ ifaces[total].netmask = ((struct sockaddr_in *)ifptr->ifa_netmask)->sin_addr;
+ strlcpy(ifaces[total].name, ifptr->ifa_name,
+ sizeof(ifaces[total].name));
total++;
}
- close(fd);
+ freeifaddrs(iflist);
return total;
}
-#define _FOUND_IFACE_ANY
-#endif /* HAVE_IFACE_IFREQ */
-#ifdef HAVE_IFACE_AIX
-
-/****************************************************************************
-this one is for AIX (tested on 4.2)
-****************************************************************************/
-static int _get_interfaces(struct iface_struct *ifaces, int max_interfaces)
-{
- char buff[8192];
- int fd, i;
- struct ifconf ifc;
- struct ifreq *ifr=NULL;
- struct in_addr ipaddr;
- struct in_addr nmask;
- char *iname;
- int total = 0;
-
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
- return -1;
- }
-
-
- ifc.ifc_len = sizeof(buff);
- ifc.ifc_buf = buff;
-
- if (ioctl(fd, SIOCGIFCONF, &ifc) != 0) {
- close(fd);
- return -1;
- }
-
- ifr = ifc.ifc_req;
-
- /* Loop through interfaces */
- i = ifc.ifc_len;
-
- while (i > 0 && total < max_interfaces) {
- uint_t inc;
-
- inc = ifr->ifr_addr.sa_len;
-
- if (ioctl(fd, SIOCGIFADDR, ifr) != 0) {
- goto next;
- }
-
- ipaddr = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
- iname = ifr->ifr_name;
-
- if (ioctl(fd, SIOCGIFFLAGS, ifr) != 0) {
- goto next;
- }
-
- if (!(ifr->ifr_flags & IFF_UP)) {
- goto next;
- }
-
- if (ioctl(fd, SIOCGIFNETMASK, ifr) != 0) {
- goto next;
- }
-
- nmask = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr;
-
- strncpy(ifaces[total].name, iname, sizeof(ifaces[total].name)-1);
- ifaces[total].name[sizeof(ifaces[total].name)-1] = 0;
- ifaces[total].ip = ipaddr;
- ifaces[total].netmask = nmask;
-
- total++;
-
- next:
- /*
- * Patch from Archie Cobbs (archie@whistle.com). The
- * addresses in the SIOCGIFCONF interface list have a
- * minimum size. Usually this doesn't matter, but if
- * your machine has tunnel interfaces, etc. that have
- * a zero length "link address", this does matter. */
-
- if (inc < sizeof(ifr->ifr_addr))
- inc = sizeof(ifr->ifr_addr);
- inc += IFNAMSIZ;
-
- ifr = (struct ifreq*) (((char*) ifr) + inc);
- i -= inc;
- }
-
-
- close(fd);
- return total;
-}
-
-#define _FOUND_IFACE_ANY
-#endif /* HAVE_IFACE_AIX */
-#ifndef _FOUND_IFACE_ANY
-static int _get_interfaces(struct iface_struct *ifaces, int max_interfaces)
-{
- return -1;
-}
-#endif
-
-
static int iface_comp(struct iface_struct *i1, struct iface_struct *i2)
{
int r;
if (total <= 0) return total;
/* now we need to remove duplicates */
- qsort(ifaces, total, sizeof(ifaces[0]), QSORT_CAST iface_comp);
+ TYPESAFE_QSORT(ifaces, total, iface_comp);
for (i=1;i<total;) {
if (iface_comp(&ifaces[i-1], &ifaces[i]) == 0) {
return total;
}
-
-
-#ifdef AUTOCONF_TEST
-/* this is the autoconf driver to test get_interfaces() */
-
- int main()
-{
- struct iface_struct ifaces[MAX_INTERFACES];
- int total = get_interfaces(ifaces, MAX_INTERFACES);
- int i;
-
- printf("got %d interfaces:\n", total);
- if (total <= 0) exit(1);
-
- for (i=0;i<total;i++) {
- printf("%-10s ", ifaces[i].name);
- printf("IP=%s ", inet_ntoa(ifaces[i].ip));
- printf("NETMASK=%s\n", inet_ntoa(ifaces[i].netmask));
- }
- return 0;
-}
-#endif
git.samba.org / nivanova / samba-autobuild / .git / blobdiff