-/*
- Unix SMB/Netbios implementation.
- Version 2.0
+/*
+ Unix SMB/CIFS implementation.
return a list of network interfaces
Copyright (C) Andrew Tridgell 1998
-
+ Copyright (C) Jeremy Allison 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,
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.
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#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>
-
-#ifndef SIOCGIFCONF
-#include <sys/sockio.h>
-#endif
-
-#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_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. */
+#include "includes.h"
/****************************************************************************
- get the netmask address for a local interface
+ Create a struct sockaddr_storage with the netmask bits set to 1.
****************************************************************************/
-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;
+bool make_netmask(struct sockaddr_storage *pss_out,
+ const struct sockaddr_storage *pss_in,
+ unsigned long masklen)
+{
+ *pss_out = *pss_in;
+ /* Now apply masklen bits of mask. */
+#if defined(HAVE_IPV6)
+ if (pss_in->ss_family == AF_INET6) {
+ char *p = (char *)&((struct sockaddr_in6 *)pss_out)->sin6_addr;
+ unsigned int i;
+
+ if (masklen > 128) {
+ return false;
+ }
+ for (i = 0; masklen >= 8; masklen -= 8, i++) {
+ *p++ = 0xff;
+ }
+ /* Deal with the partial byte. */
+ *p++ &= (0xff & ~(0xff>>masklen));
+ i++;
+ for (;i < sizeof(struct in6_addr); i++) {
+ *p++ = '\0';
+ }
+ return true;
}
-
- 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;
+#endif
+ if (pss_in->ss_family == AF_INET) {
+ if (masklen > 32) {
+ return false;
}
+ ((struct sockaddr_in *)pss_out)->sin_addr.s_addr =
+ htonl(((0xFFFFFFFFL >> masklen) ^ 0xFFFFFFFFL));
+ return true;
+ }
+ return false;
+}
- iname = ifr[i].ifr_name;
- ipaddr = (*(struct sockaddr_in *)&ifr[i].ifr_addr).sin_addr;
+/****************************************************************************
+ Create a struct sockaddr_storage set to the broadcast or network adress from
+ an incoming sockaddr_storage.
+****************************************************************************/
- if (ioctl(fd, SIOCGIFFLAGS, &ifr[i]) != 0) {
- continue;
- }
+static void make_bcast_or_net(struct sockaddr_storage *pss_out,
+ const struct sockaddr_storage *pss_in,
+ const struct sockaddr_storage *nmask,
+ bool make_bcast_p)
+{
+ unsigned int i = 0, len = 0;
+ char *pmask = NULL;
+ char *p = NULL;
+ *pss_out = *pss_in;
+
+ /* Set all zero netmask bits to 1. */
+#if defined(HAVE_IPV6)
+ if (pss_in->ss_family == AF_INET6) {
+ p = (char *)&((struct sockaddr_in6 *)pss_out)->sin6_addr;
+ pmask = (char *)&((struct sockaddr_in6 *)nmask)->sin6_addr;
+ len = 16;
+ }
+#endif
+ if (pss_in->ss_family == AF_INET) {
+ p = (char *)&((struct sockaddr_in *)pss_out)->sin_addr;
+ pmask = (char *)&((struct sockaddr_in *)nmask)->sin_addr;
+ len = 4;
+ }
- if (!(ifr[i].ifr_flags & IFF_UP)) {
- continue;
+ for (i = 0; i < len; i++, p++, pmask++) {
+ if (make_bcast_p) {
+ *p = (*p & *pmask) | (*pmask ^ 0xff);
+ } else {
+ /* make_net */
+ *p = (*p & *pmask);
}
-
- 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;
-}
+void make_bcast(struct sockaddr_storage *pss_out,
+ const struct sockaddr_storage *pss_in,
+ const struct sockaddr_storage *nmask)
+{
+ make_bcast_or_net(pss_out, pss_in, nmask, true);
+}
-#elif HAVE_IFACE_IFREQ
+void make_net(struct sockaddr_storage *pss_out,
+ const struct sockaddr_storage *pss_in,
+ const struct sockaddr_storage *nmask)
+{
+ make_bcast_or_net(pss_out, pss_in, nmask, false);
+}
-#ifndef I_STR
-#include <sys/stropts.h>
-#endif
+/****************************************************************************
+ Try the "standard" getifaddrs/freeifaddrs interfaces.
+ Also gets IPv6 interfaces.
+****************************************************************************/
/****************************************************************************
-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;
+ size_t copy_size;
- 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);
+ if (getifaddrs(&iflist) < 0) {
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 */
+ /* Loop through interfaces, looking for given IP address */
+ for (ifptr = iflist, total = 0;
+ ifptr != NULL && total < max_interfaces;
+ ifptr = ifptr->ifa_next) {
- 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;
- }
+ memset(&ifaces[total], '\0', sizeof(ifaces[total]));
+
+ copy_size = sizeof(struct sockaddr_in);
- strioctl.ic_cmd = SIOCGIFADDR;
- strioctl.ic_dp = (char *)&ifreq;
- strioctl.ic_len = sizeof(struct ifreq);
- if (ioctl(fd, I_STR, &strioctl) != 0) {
+ if (!ifptr->ifa_addr || !ifptr->ifa_netmask) {
continue;
}
- ipaddr = (*(struct sockaddr_in *) &ifreq.ifr_addr).sin_addr;
- iname = ifreq.ifr_name;
+ ifaces[total].flags = ifptr->ifa_flags;
- strioctl.ic_cmd = SIOCGIFNETMASK;
- strioctl.ic_dp = (char *)&ifreq;
- strioctl.ic_len = sizeof(struct ifreq);
- if (ioctl(fd, I_STR, &strioctl) != 0) {
+ /* Check the interface is up. */
+ if (!(ifaces[total].flags & IFF_UP)) {
continue;
}
- nmask = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr;
+#if defined(HAVE_IPV6)
+ if (ifptr->ifa_addr->sa_family == AF_INET6) {
+ copy_size = sizeof(struct sockaddr_in6);
+ }
+#endif
- 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;
+ memcpy(&ifaces[total].ip, ifptr->ifa_addr, copy_size);
+ memcpy(&ifaces[total].netmask, ifptr->ifa_netmask, copy_size);
+
+ if (ifaces[total].flags & (IFF_BROADCAST|IFF_LOOPBACK)) {
+ make_bcast(&ifaces[total].bcast,
+ &ifaces[total].ip,
+ &ifaces[total].netmask);
+ } else if ((ifaces[total].flags & IFF_POINTOPOINT) &&
+ ifptr->ifa_dstaddr ) {
+ memcpy(&ifaces[total].bcast,
+ ifptr->ifa_dstaddr,
+ copy_size);
+ } else {
+ continue;
+ }
+ strlcpy(ifaces[total].name, ifptr->ifa_name,
+ sizeof(ifaces[total].name));
total++;
}
- close(fd);
+ freeifaddrs(iflist);
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)
+static int iface_comp(struct iface_struct *i1, struct iface_struct *i2)
{
- 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;
+ int r;
- if (ioctl(fd, SIOCGIFCONF, &ifc) != 0) {
- close(fd);
+#if defined(HAVE_IPV6)
+ /*
+ * If we have IPv6 - sort these interfaces lower
+ * than any IPv4 ones.
+ */
+ if (i1->ip.ss_family == AF_INET6 &&
+ i2->ip.ss_family == AF_INET) {
return -1;
+ } else if (i1->ip.ss_family == AF_INET &&
+ i2->ip.ss_family == AF_INET6) {
+ return 1;
}
- ifr = ifc.ifc_req;
-
- /* Loop through interfaces */
- i = ifc.ifc_len;
+ if (i1->ip.ss_family == AF_INET6) {
+ struct sockaddr_in6 *s1 = (struct sockaddr_in6 *)&i1->ip;
+ struct sockaddr_in6 *s2 = (struct sockaddr_in6 *)&i2->ip;
- while (i > 0 && total < max_interfaces) {
- unsigned inc;
-
- inc = ifr->ifr_addr.sa_len;
-
- if (ioctl(fd, SIOCGIFADDR, ifr) != 0) {
- goto next;
+ r = memcmp(&s1->sin6_addr,
+ &s2->sin6_addr,
+ sizeof(struct in6_addr));
+ if (r) {
+ return r;
}
- ipaddr = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
- iname = ifr->ifr_name;
-
- if (ioctl(fd, SIOCGIFFLAGS, ifr) != 0) {
- goto next;
- }
+ s1 = (struct sockaddr_in6 *)&i1->netmask;
+ s2 = (struct sockaddr_in6 *)&i2->netmask;
- if (!(ifr->ifr_flags & IFF_UP)) {
- goto next;
+ r = memcmp(&s1->sin6_addr,
+ &s2->sin6_addr,
+ sizeof(struct in6_addr));
+ if (r) {
+ return r;
}
+ }
+#endif
- 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;
+ /* AIX uses __ss_family instead of ss_family inside of
+ sockaddr_storage. Instead of trying to figure out which field to
+ use, we can just cast it to a sockaddr.
+ */
- total++;
+ if (((struct sockaddr *)&i1->ip)->sa_family == AF_INET) {
+ struct sockaddr_in *s1 = (struct sockaddr_in *)&i1->ip;
+ struct sockaddr_in *s2 = (struct sockaddr_in *)&i2->ip;
- 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. */
+ r = ntohl(s1->sin_addr.s_addr) -
+ ntohl(s2->sin_addr.s_addr);
+ if (r) {
+ return r;
+ }
- if (inc < sizeof(ifr->ifr_addr))
- inc = sizeof(ifr->ifr_addr);
- inc += IFNAMSIZ;
+ s1 = (struct sockaddr_in *)&i1->netmask;
+ s2 = (struct sockaddr_in *)&i2->netmask;
- ifr = (struct ifreq*) (((char*) ifr) + inc);
- i -= inc;
+ return ntohl(s1->sin_addr.s_addr) -
+ ntohl(s2->sin_addr.s_addr);
}
-
-
- 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;
+ return 0;
}
+int get_interfaces(struct iface_struct *ifaces, int max_interfaces);
/* this wrapper is used to remove duplicates from the interface list generated
above */
int get_interfaces(struct iface_struct *ifaces, int max_interfaces)
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
git.samba.org / ira / wip.git / blobdiff