--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ return a list of network interfaces
+ Copyright (C) Andrew Tridgell 1998
+
+ 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
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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.
+*/
+
+
+/* working out the interfaces for a OS is an incredibly non-portable
+ thing. We have several possible implementations below, and autoconf
+ tries each of them to see what works
+
+ Note that this file does _not_ include includes.h. That is so this code
+ can be called directly from the autoconf tests. That also means
+ this code cannot use any of the normal Samba debug stuff or defines.
+ This is standalone code.
+
+*/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <net/if.h>
+
+#ifdef AUTOCONF_TEST
+struct iface_struct {
+ char name[16];
+ struct in_addr ip;
+ struct in_addr netmask;
+};
+#else
+#include "config.h"
+#include "interfaces.h"
+#endif
+
+#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
+
+#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. */
+
+/****************************************************************************
+ get the netmask address for a local interface
+****************************************************************************/
+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;
+}
+
+#elif 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
+****************************************************************************/
+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;
+ int total = 0;
+ struct in_addr ipaddr;
+ struct in_addr nmask;
+ char *iname;
+
+ if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
+ 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 */
+
+ 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)) {
+ continue;
+ }
+
+ strioctl.ic_cmd = SIOCGIFADDR;
+ strioctl.ic_dp = (char *)&ifreq;
+ strioctl.ic_len = sizeof(struct ifreq);
+ if (ioctl(fd, I_STR, &strioctl) != 0) {
+ 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) {
+ 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;
+
+ total++;
+ }
+
+ close(fd);
+
+ return total;
+}
+
+#elif 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) {
+ unsigned 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;
+}
+
+#else /* a dummy version */
+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;
+ r = strcmp(i1->name, i2->name);
+ if (r) return r;
+ r = ntohl(i1->ip.s_addr) - ntohl(i2->ip.s_addr);
+ if (r) return r;
+ r = ntohl(i1->netmask.s_addr) - ntohl(i2->netmask.s_addr);
+ return r;
+}
+
+/* this wrapper is used to remove duplicates from the interface list generated
+ above */
+int get_interfaces(struct iface_struct *ifaces, int max_interfaces);
+
+int get_interfaces(struct iface_struct *ifaces, int max_interfaces)
+{
+ int total, i, j;
+
+ total = _get_interfaces(ifaces, max_interfaces);
+ if (total <= 0) return total;
+
+ /* now we need to remove duplicates */
+ qsort(ifaces, total, sizeof(ifaces[0]), QSORT_CAST iface_comp);
+
+ for (i=1;i<total;) {
+ if (iface_comp(&ifaces[i-1], &ifaces[i]) == 0) {
+ for (j=i-1;j<total-1;j++) {
+ ifaces[j] = ifaces[j+1];
+ }
+ total--;
+ } else {
+ i++;
+ }
+ }
+
+ return total;
+}
+
+
+#ifdef AUTOCONF_TEST
+/* this is the autoconf driver to test get_interfaces() */
+
+#define MAX_INTERFACES 128
+
+ 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
projects / samba / blobdiff