-/*
+/*
Unix SMB/CIFS implementation.
multiple interface handling
Copyright (C) Andrew Tridgell 1992-1998
-
+ 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 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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
static struct iface_struct *probed_ifaces;
static int total_probed;
-struct in_addr allones_ip;
-struct in_addr loopback_ip;
-
static struct interface *local_interfaces;
-#define ALLONES ((uint32)0xFFFFFFFF)
-#define MKBCADDR(_IP, _NM) ((_IP & _NM) | (_NM ^ ALLONES))
-#define MKNETADDR(_IP, _NM) (_IP & _NM)
+/****************************************************************************
+ Check if an IP is one of mine.
+**************************************************************************/
+
+bool ismyaddr(const struct sockaddr_storage *ip)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (addr_equal(&i->ip,ip)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool ismyip_v4(struct in_addr ip)
+{
+ struct sockaddr_storage ss;
+ in_addr_to_sockaddr_storage(&ss, ip);
+ return ismyaddr(&ss);
+}
+
+/****************************************************************************
+ Try and find an interface that matches an ip. If we cannot, return NULL.
+**************************************************************************/
+
+static struct interface *iface_find(const struct sockaddr_storage *ip,
+ bool check_mask)
+{
+ struct interface *i;
+
+ if (is_address_any(ip)) {
+ return local_interfaces;
+ }
+
+ for (i=local_interfaces;i;i=i->next) {
+ if (check_mask) {
+ if (same_net(ip, &i->ip, &i->netmask)) {
+ return i;
+ }
+ } else if (addr_equal(&i->ip, ip)) {
+ return i;
+ }
+ }
+
+ return NULL;
+}
+
+/****************************************************************************
+ Check if a packet is from a local (known) net.
+**************************************************************************/
+
+bool is_local_net(const struct sockaddr_storage *from)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (same_net(from, &i->ip, &i->netmask)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+#if defined(HAVE_IPV6)
+void setup_linklocal_scope_id(struct sockaddr_storage *pss)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (addr_equal(&i->ip,pss)) {
+ struct sockaddr_in6 *psa6 =
+ (struct sockaddr_in6 *)pss;
+ psa6->sin6_scope_id = if_nametoindex(i->name);
+ return;
+ }
+ }
+}
+#endif
+
+/****************************************************************************
+ Check if a packet is from a local (known) net.
+**************************************************************************/
+
+bool is_local_net_v4(struct in_addr from)
+{
+ struct sockaddr_storage ss;
+
+ in_addr_to_sockaddr_storage(&ss, from);
+ return is_local_net(&ss);
+}
+
+/****************************************************************************
+ How many interfaces do we have ?
+**************************************************************************/
+
+int iface_count(void)
+{
+ int ret = 0;
+ struct interface *i;
+
+ for (i=local_interfaces;i;i=i->next) {
+ ret++;
+ }
+ return ret;
+}
+
+/****************************************************************************
+ How many non-loopback IPv4 interfaces do we have ?
+**************************************************************************/
+
+int iface_count_v4_nl(void)
+{
+ int ret = 0;
+ struct interface *i;
+
+ for (i=local_interfaces;i;i=i->next) {
+ if (is_loopback_addr(&i->ip)) {
+ continue;
+ }
+ if (i->ip.ss_family == AF_INET) {
+ ret++;
+ }
+ }
+ return ret;
+}
+
+/****************************************************************************
+ Return a pointer to the in_addr of the first IPv4 interface.
+**************************************************************************/
+
+const struct in_addr *first_ipv4_iface(void)
+{
+ struct interface *i;
+
+ for (i=local_interfaces;i ;i=i->next) {
+ if (i->ip.ss_family == AF_INET) {
+ break;
+ }
+ }
+
+ if (!i) {
+ return NULL;
+ }
+ return &((const struct sockaddr_in *)&i->ip)->sin_addr;
+}
+
+/****************************************************************************
+ Return the Nth interface.
+**************************************************************************/
+
+struct interface *get_interface(int n)
+{
+ struct interface *i;
+
+ for (i=local_interfaces;i && n;i=i->next) {
+ n--;
+ }
+
+ if (i) {
+ return i;
+ }
+ return NULL;
+}
+
+/****************************************************************************
+ Return IP sockaddr_storage of the Nth interface.
+**************************************************************************/
+
+const struct sockaddr_storage *iface_n_sockaddr_storage(int n)
+{
+ struct interface *i;
+
+ for (i=local_interfaces;i && n;i=i->next) {
+ n--;
+ }
+
+ if (i) {
+ return &i->ip;
+ }
+ return NULL;
+}
+
+/****************************************************************************
+ Return IPv4 of the Nth interface (if a v4 address). NULL otherwise.
+**************************************************************************/
+
+const struct in_addr *iface_n_ip_v4(int n)
+{
+ struct interface *i;
+
+ for (i=local_interfaces;i && n;i=i->next) {
+ n--;
+ }
+
+ if (i && i->ip.ss_family == AF_INET) {
+ return &((const struct sockaddr_in *)&i->ip)->sin_addr;
+ }
+ return NULL;
+}
+
+/****************************************************************************
+ Return IPv4 bcast of the Nth interface (if a v4 address). NULL otherwise.
+**************************************************************************/
+
+const struct in_addr *iface_n_bcast_v4(int n)
+{
+ struct interface *i;
+
+ for (i=local_interfaces;i && n;i=i->next) {
+ n--;
+ }
+
+ if (i && i->ip.ss_family == AF_INET) {
+ return &((const struct sockaddr_in *)&i->bcast)->sin_addr;
+ }
+ return NULL;
+}
/****************************************************************************
-Try and find an interface that matches an ip. If we cannot, return NULL
- **************************************************************************/
-static struct interface *iface_find(struct in_addr ip, BOOL CheckMask)
+ Return bcast of the Nth interface.
+**************************************************************************/
+
+const struct sockaddr_storage *iface_n_bcast(int n)
{
struct interface *i;
- if (is_zero_ip(ip)) return local_interfaces;
- for (i=local_interfaces;i;i=i->next)
- if (CheckMask) {
- if (same_net(i->ip,ip,i->nmask)) return i;
- } else if ((i->ip).s_addr == ip.s_addr) return i;
+ for (i=local_interfaces;i && n;i=i->next) {
+ n--;
+ }
+ if (i) {
+ return &i->bcast;
+ }
return NULL;
}
+/* these 3 functions return the ip/bcast/nmask for the interface
+ most appropriate for the given ip address. If they can't find
+ an appropriate interface they return the requested field of the
+ first known interface. */
+
+const struct sockaddr_storage *iface_ip(const struct sockaddr_storage *ip)
+{
+ struct interface *i = iface_find(ip, true);
+ if (i) {
+ return &i->ip;
+ }
+
+ /* Search for the first interface with
+ * matching address family. */
+
+ for (i=local_interfaces;i;i=i->next) {
+ if (i->ip.ss_family == ip->ss_family) {
+ return &i->ip;
+ }
+ }
+ return NULL;
+}
+
+/*
+ return True if a IP is directly reachable on one of our interfaces
+*/
+
+bool iface_local(const struct sockaddr_storage *ip)
+{
+ return iface_find(ip, True) ? true : false;
+}
/****************************************************************************
-add an interface to the linked list of interfaces
+ Add an interface to the linked list of interfaces.
****************************************************************************/
-static void add_interface(struct in_addr ip, struct in_addr nmask)
+
+static void add_interface(const struct iface_struct *ifs)
{
+ char addr[INET6_ADDRSTRLEN];
struct interface *iface;
- if (iface_find(ip, False)) {
- DEBUG(3,("not adding duplicate interface %s\n",inet_ntoa(ip)));
+
+ if (iface_find(&ifs->ip, False)) {
+ DEBUG(3,("add_interface: not adding duplicate interface %s\n",
+ print_sockaddr(addr, sizeof(addr), &ifs->ip) ));
return;
}
-#if !defined(__s390__)
- if (ip_equal(nmask, allones_ip)) {
- DEBUG(3,("not adding non-broadcast interface %s\n",inet_ntoa(ip)));
+ if (!(ifs->flags & (IFF_BROADCAST|IFF_LOOPBACK))) {
+ DEBUG(3,("not adding non-broadcast interface %s\n",
+ ifs->name ));
return;
}
-#endif
iface = SMB_MALLOC_P(struct interface);
- if (!iface) return;
-
+ if (!iface) {
+ return;
+ }
+
ZERO_STRUCTPN(iface);
- iface->ip = ip;
- iface->nmask = nmask;
- iface->bcast.s_addr = MKBCADDR(iface->ip.s_addr, iface->nmask.s_addr);
+ iface->name = SMB_STRDUP(ifs->name);
+ if (!iface->name) {
+ SAFE_FREE(iface);
+ return;
+ }
+ iface->flags = ifs->flags;
+ iface->ip = ifs->ip;
+ iface->netmask = ifs->netmask;
+ iface->bcast = ifs->bcast;
DLIST_ADD(local_interfaces, iface);
- DEBUG(2,("added interface ip=%s ",inet_ntoa(iface->ip)));
- DEBUG(2,("bcast=%s ",inet_ntoa(iface->bcast)));
- DEBUG(2,("nmask=%s\n",inet_ntoa(iface->nmask)));
+ DEBUG(2,("added interface %s ip=%s ",
+ iface->name,
+ print_sockaddr(addr, sizeof(addr), &iface->ip) ));
+ DEBUG(2,("bcast=%s ",
+ print_sockaddr(addr, sizeof(addr),
+ &iface->bcast) ));
+ DEBUG(2,("netmask=%s\n",
+ print_sockaddr(addr, sizeof(addr),
+ &iface->netmask) ));
}
-
-
/****************************************************************************
-interpret a single element from a interfaces= config line
+ Interpret a single element from a interfaces= config line.
-This handles the following different forms:
+ This handles the following different forms:
-1) wildcard interface name
-2) DNS name
-3) IP/masklen
-4) ip/mask
-5) bcast/mask
+ 1) wildcard interface name
+ 2) DNS name
+ 3) IP/masklen
+ 4) ip/mask
+ 5) bcast/mask
****************************************************************************/
+
static void interpret_interface(char *token)
{
- struct in_addr ip, nmask;
+ struct sockaddr_storage ss;
+ struct sockaddr_storage ss_mask;
+ struct sockaddr_storage ss_net;
+ struct sockaddr_storage ss_bcast;
+ struct iface_struct ifs;
char *p;
- int i, added=0;
+ int i;
+ bool added=false;
+ bool goodaddr = false;
- zero_ip(&ip);
- zero_ip(&nmask);
-
/* first check if it is an interface name */
for (i=0;i<total_probed;i++) {
if (gen_fnmatch(token, probed_ifaces[i].name) == 0) {
- add_interface(probed_ifaces[i].ip,
- probed_ifaces[i].netmask);
- added = 1;
+ add_interface(&probed_ifaces[i]);
+ added = true;
}
}
- if (added) return;
+ if (added) {
+ return;
+ }
/* maybe it is a DNS name */
p = strchr_m(token,'/');
- if (!p) {
- ip = *interpret_addr2(token);
+ if (p == NULL) {
+ if (!interpret_string_addr(&ss, token, 0)) {
+ DEBUG(2, ("interpret_interface: Can't find address "
+ "for %s\n", token));
+ return;
+ }
+
for (i=0;i<total_probed;i++) {
- if (ip.s_addr == probed_ifaces[i].ip.s_addr &&
- !ip_equal(allones_ip, probed_ifaces[i].netmask)) {
- add_interface(probed_ifaces[i].ip,
- probed_ifaces[i].netmask);
+ if (addr_equal(&ss, &probed_ifaces[i].ip)) {
+ add_interface(&probed_ifaces[i]);
return;
}
}
- DEBUG(2,("can't determine netmask for %s\n", token));
+ DEBUG(2,("interpret_interface: "
+ "can't determine interface for %s\n",
+ token));
return;
}
/* parse it into an IP address/netmasklength pair */
*p = 0;
- ip = *interpret_addr2(token);
+ goodaddr = interpret_string_addr(&ss, token, 0);
*p++ = '/';
+ if (!goodaddr) {
+ DEBUG(2,("interpret_interface: "
+ "can't determine interface for %s\n",
+ token));
+ return;
+ }
+
if (strlen(p) > 2) {
- nmask = *interpret_addr2(p);
+ goodaddr = interpret_string_addr(&ss_mask, p, 0);
+ if (!goodaddr) {
+ DEBUG(2,("interpret_interface: "
+ "can't determine netmask from %s\n",
+ p));
+ return;
+ }
} else {
- nmask.s_addr = htonl(((ALLONES >> atoi(p)) ^ ALLONES));
+ char *endp = NULL;
+ unsigned long val = strtoul(p, &endp, 0);
+ if (p == endp || (endp && *endp != '\0')) {
+ DEBUG(2,("interpret_interface: "
+ "can't determine netmask value from %s\n",
+ p));
+ return;
+ }
+ if (!make_netmask(&ss_mask, &ss, val)) {
+ DEBUG(2,("interpret_interface: "
+ "can't apply netmask value %lu from %s\n",
+ val,
+ p));
+ return;
+ }
}
- /* maybe the first component was a broadcast address */
- if (ip.s_addr == MKBCADDR(ip.s_addr, nmask.s_addr) ||
- ip.s_addr == MKNETADDR(ip.s_addr, nmask.s_addr)) {
+ make_bcast(&ss_bcast, &ss, &ss_mask);
+ make_net(&ss_net, &ss, &ss_mask);
+
+ /* Maybe the first component was a broadcast address. */
+ if (addr_equal(&ss_bcast, &ss) || addr_equal(&ss_net, &ss)) {
for (i=0;i<total_probed;i++) {
- if (same_net(ip, probed_ifaces[i].ip, nmask)) {
- add_interface(probed_ifaces[i].ip, nmask);
+ if (same_net(&ss, &probed_ifaces[i].ip, &ss_mask)) {
+ /* Temporarily replace netmask on
+ * the detected interface - user knows
+ * best.... */
+ struct sockaddr_storage saved_mask =
+ probed_ifaces[i].netmask;
+ probed_ifaces[i].netmask = ss_mask;
+ DEBUG(2,("interpret_interface: "
+ "using netmask value %s from "
+ "config file on interface %s\n",
+ p,
+ probed_ifaces[i].name));
+ add_interface(&probed_ifaces[i]);
+ probed_ifaces[i].netmask = saved_mask;
return;
}
}
- DEBUG(2,("Can't determine ip for broadcast address %s\n", token));
+ DEBUG(2,("interpret_interface: Can't determine ip for "
+ "broadcast address %s\n",
+ token));
return;
}
- add_interface(ip, nmask);
-}
+ /* Just fake up the interface definition. User knows best. */
+
+ DEBUG(2,("interpret_interface: Adding interface %s\n",
+ token));
+ ZERO_STRUCT(ifs);
+ (void)strlcpy(ifs.name, token, sizeof(ifs.name));
+ ifs.flags = IFF_BROADCAST;
+ ifs.ip = ss;
+ ifs.netmask = ss_mask;
+ ifs.bcast = ss_bcast;
+ add_interface(&ifs);
+}
/****************************************************************************
-load the list of network interfaces
+ Load the list of network interfaces.
****************************************************************************/
+
void load_interfaces(void)
{
- const char **ptr;
- int i;
struct iface_struct ifaces[MAX_INTERFACES];
-
- ptr = lp_interfaces();
-
- allones_ip = *interpret_addr2("255.255.255.255");
- loopback_ip = *interpret_addr2("127.0.0.1");
+ const char **ptr = lp_interfaces();
+ int i;
SAFE_FREE(probed_ifaces);
while (local_interfaces) {
struct interface *iface = local_interfaces;
DLIST_REMOVE(local_interfaces, local_interfaces);
- ZERO_STRUCTPN(iface);
+ SAFE_FREE(iface->name);
SAFE_FREE(iface);
}
- /* probe the kernel for interfaces */
+ /* Probe the kernel for interfaces */
total_probed = get_interfaces(ifaces, MAX_INTERFACES);
if (total_probed > 0) {
- probed_ifaces = (struct iface_struct *)memdup(ifaces, sizeof(ifaces[0])*total_probed);
+ probed_ifaces = (struct iface_struct *)memdup(ifaces,
+ sizeof(ifaces[0])*total_probed);
if (!probed_ifaces) {
DEBUG(0,("ERROR: memdup failed\n"));
exit(1);
}
}
- /* if we don't have a interfaces line then use all broadcast capable
+ /* if we don't have a interfaces line then use all broadcast capable
interfaces except loopback */
if (!ptr || !*ptr || !**ptr) {
if (total_probed <= 0) {
- DEBUG(0,("ERROR: Could not determine network interfaces, you must use a interfaces config line\n"));
+ DEBUG(0,("ERROR: Could not determine network "
+ "interfaces, you must use a interfaces config line\n"));
exit(1);
}
for (i=0;i<total_probed;i++) {
- if (
-#if !defined(__s390__)
- probed_ifaces[i].netmask.s_addr != allones_ip.s_addr &&
-#endif
- probed_ifaces[i].ip.s_addr != loopback_ip.s_addr) {
- add_interface(probed_ifaces[i].ip,
- probed_ifaces[i].netmask);
+ if (probed_ifaces[i].flags & IFF_BROADCAST) {
+ add_interface(&probed_ifaces[i]);
}
}
return;
while (local_interfaces) {
struct interface *iface = local_interfaces;
DLIST_REMOVE(local_interfaces, local_interfaces);
- ZERO_STRUCTPN(iface);
+ SAFE_FREE(iface->name);
SAFE_FREE(iface);
}
}
/****************************************************************************
-return True if the list of probed interfaces has changed
+ Return True if the list of probed interfaces has changed.
****************************************************************************/
-BOOL interfaces_changed(void)
+
+bool interfaces_changed(void)
{
int n;
struct iface_struct ifaces[MAX_INTERFACES];
n = get_interfaces(ifaces, MAX_INTERFACES);
if ((n > 0 )&& (n != total_probed ||
- memcmp(ifaces, probed_ifaces, sizeof(ifaces[0])*n))) {
- return True;
- }
-
- return False;
-}
-
-
-/****************************************************************************
- check if an IP is one of mine
- **************************************************************************/
-BOOL ismyip(struct in_addr ip)
-{
- struct interface *i;
- for (i=local_interfaces;i;i=i->next)
- if (ip_equal(i->ip,ip)) return True;
- return False;
-}
-
-/****************************************************************************
- check if a packet is from a local (known) net
- **************************************************************************/
-BOOL is_local_net(struct in_addr from)
-{
- struct interface *i;
- for (i=local_interfaces;i;i=i->next) {
- if((from.s_addr & i->nmask.s_addr) ==
- (i->ip.s_addr & i->nmask.s_addr))
- return True;
+ memcmp(ifaces, probed_ifaces, sizeof(ifaces[0])*n))) {
+ return true;
}
- return False;
-}
-
-/****************************************************************************
- how many interfaces do we have
- **************************************************************************/
-int iface_count(void)
-{
- int ret = 0;
- struct interface *i;
-
- for (i=local_interfaces;i;i=i->next)
- ret++;
- return ret;
-}
-
-/****************************************************************************
- return the Nth interface
- **************************************************************************/
-struct interface *get_interface(int n)
-{
- struct interface *i;
-
- for (i=local_interfaces;i && n;i=i->next)
- n--;
- if (i) return i;
- return NULL;
-}
-
-/****************************************************************************
- return IP of the Nth interface
- **************************************************************************/
-struct in_addr *iface_n_ip(int n)
-{
- struct interface *i;
-
- for (i=local_interfaces;i && n;i=i->next)
- n--;
-
- if (i) return &i->ip;
- return NULL;
-}
-
-/****************************************************************************
- return bcast of the Nth interface
- **************************************************************************/
-struct in_addr *iface_n_bcast(int n)
-{
- struct interface *i;
-
- for (i=local_interfaces;i && n;i=i->next)
- n--;
-
- if (i) return &i->bcast;
- return NULL;
-}
-
-
-/* these 3 functions return the ip/bcast/nmask for the interface
- most appropriate for the given ip address. If they can't find
- an appropriate interface they return the requested field of the
- first known interface. */
-
-struct in_addr *iface_ip(struct in_addr ip)
-{
- struct interface *i = iface_find(ip, True);
- return(i ? &i->ip : &local_interfaces->ip);
-}
-
-/*
- return True if a IP is directly reachable on one of our interfaces
-*/
-BOOL iface_local(struct in_addr ip)
-{
- return iface_find(ip, True) ? True : False;
+ return false;
}
git.samba.org / gd / samba-autobuild / .git / blobdiff