/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
multiple interface handling
Copyright (C) Andrew Tridgell 1992-1998
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
+ 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,
#include "includes.h"
-#define MAX_INTERFACES 128
-
static struct iface_struct *probed_ifaces;
static int total_probed;
-extern int DEBUGLEVEL;
-
-struct in_addr ipzero;
struct in_addr allones_ip;
struct in_addr loopback_ip;
-static struct interface *local_interfaces = NULL;
+static struct interface *local_interfaces;
#define ALLONES ((uint32)0xFFFFFFFF)
#define MKBCADDR(_IP, _NM) ((_IP & _NM) | (_NM ^ ALLONES))
/****************************************************************************
Try and find an interface that matches an ip. If we cannot, return NULL
**************************************************************************/
-static struct interface *iface_find(struct in_addr ip)
+static struct interface *iface_find(struct in_addr ip, BOOL CheckMask)
{
struct interface *i;
- if (zero_ip(ip)) return local_interfaces;
+ if (is_zero_ip(ip)) return local_interfaces;
for (i=local_interfaces;i;i=i->next)
- if (same_net(i->ip,ip,i->nmask)) return i;
+ if (CheckMask) {
+ if (same_net(i->ip,ip,i->nmask)) return i;
+ } else if ((i->ip).s_addr == ip.s_addr) return i;
return NULL;
}
static void add_interface(struct in_addr ip, struct in_addr nmask)
{
struct interface *iface;
- if (iface_find(ip)) {
+ if (iface_find(ip, False)) {
DEBUG(3,("not adding duplicate interface %s\n",inet_ntoa(ip)));
return;
}
+#if !defined(__s390__)
if (ip_equal(nmask, allones_ip)) {
DEBUG(3,("not adding non-broadcast interface %s\n",inet_ntoa(ip)));
return;
}
+#endif
- iface = (struct interface *)malloc(sizeof(*iface));
+ iface = SMB_MALLOC_P(struct interface);
if (!iface) return;
ZERO_STRUCTPN(iface);
char *p;
int i, added=0;
- ip = ipzero;
- nmask = ipzero;
+ zero_ip(&ip);
+ zero_ip(&nmask);
/* first check if it is an interface name */
for (i=0;i<total_probed;i++) {
- if (fnmatch(token, probed_ifaces[i].name, 0) == 0) {
+ if (gen_fnmatch(token, probed_ifaces[i].name) == 0) {
add_interface(probed_ifaces[i].ip,
probed_ifaces[i].netmask);
added = 1;
if (added) return;
/* maybe it is a DNS name */
- p = strchr(token,'/');
+ p = strchr_m(token,'/');
if (!p) {
ip = *interpret_addr2(token);
for (i=0;i<total_probed;i++) {
}
/* parse it into an IP address/netmasklength pair */
- *p++ = 0;
-
+ *p = 0;
ip = *interpret_addr2(token);
+ *p++ = '/';
if (strlen(p) > 2) {
nmask = *interpret_addr2(p);
****************************************************************************/
void load_interfaces(void)
{
- char *ptr;
- fstring token;
+ const char **ptr;
int i;
struct iface_struct ifaces[MAX_INTERFACES];
ptr = lp_interfaces();
- ipzero = *interpret_addr2("0.0.0.0");
allones_ip = *interpret_addr2("255.255.255.255");
loopback_ip = *interpret_addr2("127.0.0.1");
- if (probed_ifaces) {
- free(probed_ifaces);
- probed_ifaces = NULL;
- }
+ SAFE_FREE(probed_ifaces);
/* dump the current interfaces if any */
while (local_interfaces) {
struct interface *iface = local_interfaces;
DLIST_REMOVE(local_interfaces, local_interfaces);
ZERO_STRUCTPN(iface);
- free(iface);
+ SAFE_FREE(iface);
}
/* probe the kernel for interfaces */
total_probed = get_interfaces(ifaces, MAX_INTERFACES);
if (total_probed > 0) {
- probed_ifaces = 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
interfaces except loopback */
- if (!ptr || !*ptr) {
+ if (!ptr || !*ptr || !**ptr) {
if (total_probed <= 0) {
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 (probed_ifaces[i].netmask.s_addr != allones_ip.s_addr &&
+ 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);
return;
}
- while (next_token(&ptr,token,NULL,sizeof(token))) {
- interpret_interface(token);
+ if (ptr) {
+ while (*ptr) {
+ char *ptr_cpy = SMB_STRDUP(*ptr);
+ if (ptr_cpy) {
+ interpret_interface(ptr_cpy);
+ free(ptr_cpy);
+ }
+ ptr++;
+ }
}
if (!local_interfaces) {
}
+void gfree_interfaces(void)
+{
+ while (local_interfaces) {
+ struct interface *iface = local_interfaces;
+ DLIST_REMOVE(local_interfaces, local_interfaces);
+ ZERO_STRUCTPN(iface);
+ SAFE_FREE(iface);
+ }
+
+ SAFE_FREE(probed_ifaces);
+}
+
/****************************************************************************
return True if the list of probed interfaces has changed
****************************************************************************/
n = get_interfaces(ifaces, MAX_INTERFACES);
- if (n != total_probed ||
- memcmp(ifaces, probed_ifaces, sizeof(ifaces[0])*n)) {
+ if ((n > 0 )&& (n != total_probed ||
+ memcmp(ifaces, probed_ifaces, sizeof(ifaces[0])*n))) {
return True;
}
return ret;
}
-/****************************************************************************
- True if we have two or more interfaces.
- **************************************************************************/
-BOOL we_are_multihomed(void)
-{
- static int multi = -1;
-
- if(multi == -1)
- multi = (iface_count() > 1 ? True : False);
-
- return multi;
-}
-
/****************************************************************************
return the Nth interface
**************************************************************************/
}
-/****************************************************************************
-this function provides a simple hash of the configured interfaces. It is
-used to detect a change in interfaces to tell us whether to discard
-the current wins.dat file.
-Note that the result is independent of the order of the interfaces
- **************************************************************************/
-unsigned iface_hash(void)
-{
- unsigned ret = 0;
- struct interface *i;
-
- for (i=local_interfaces;i;i=i->next) {
- unsigned x1 = (unsigned)str_checksum(inet_ntoa(i->ip));
- unsigned x2 = (unsigned)str_checksum(inet_ntoa(i->nmask));
- ret ^= (x1 ^ x2);
- }
-
- return ret;
-}
-
-
/* 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_bcast(struct in_addr ip)
+struct in_addr *iface_ip(struct in_addr ip)
{
- struct interface *i = iface_find(ip);
- return(i ? &i->bcast : &local_interfaces->bcast);
+ struct interface *i = iface_find(ip, True);
+ return(i ? &i->ip : &local_interfaces->ip);
}
-struct in_addr *iface_ip(struct in_addr ip)
+/*
+ return True if a IP is directly reachable on one of our interfaces
+*/
+BOOL iface_local(struct in_addr ip)
{
- struct interface *i = iface_find(ip);
- return(i ? &i->ip : &local_interfaces->ip);
+ return iface_find(ip, True) ? True : False;
}
git.samba.org / samba.git / blobdiff