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-rw-r--r--source3/lib/interface.c721
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diff --git a/source3/lib/interface.c b/source3/lib/interface.c
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--- /dev/null
+++ b/source3/lib/interface.c
@@ -0,0 +1,721 @@
+/*
+ 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "lib/socket/interfaces.h"
+#include "librpc/gen_ndr/ioctl.h"
+#include "lib/util/smb_strtox.h"
+
+static struct iface_struct *probed_ifaces;
+static int total_probed;
+
+static struct interface *local_interfaces;
+
+/****************************************************************************
+ Check if an IP is one of mine.
+**************************************************************************/
+
+bool ismyaddr(const struct sockaddr *ip)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (sockaddr_equal((struct sockaddr *)&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((struct sockaddr *)&ss);
+}
+
+/****************************************************************************
+ Try and find an interface that matches an ip. If we cannot, return NULL.
+**************************************************************************/
+
+static struct interface *iface_find(const struct sockaddr *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, (struct sockaddr *)&i->ip, (struct sockaddr *)&i->netmask)) {
+ return i;
+ }
+ } else if (sockaddr_equal((struct sockaddr *)&i->ip, ip)) {
+ return i;
+ }
+ }
+
+ return NULL;
+}
+
+/****************************************************************************
+ Check if a packet is from a local (known) net.
+**************************************************************************/
+
+bool is_local_net(const struct sockaddr *from)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (same_net(from, (struct sockaddr *)&i->ip, (struct sockaddr *)&i->netmask)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+#if defined(HAVE_IPV6)
+void setup_linklocal_scope_id(struct sockaddr *pss)
+{
+ struct interface *i;
+ for (i=local_interfaces;i;i=i->next) {
+ if (sockaddr_equal((struct sockaddr *)&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((struct sockaddr *)&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((struct sockaddr *)&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 that's
+ not 0.0.0.0.
+**************************************************************************/
+
+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) &&
+ (!is_zero_ip_v4(((struct sockaddr_in *)&i->ip)->sin_addr)))
+ {
+ 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;
+}
+
+/****************************************************************************
+ Return bcast of the Nth interface.
+**************************************************************************/
+
+const struct sockaddr_storage *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. */
+
+const struct sockaddr_storage *iface_ip(const struct sockaddr *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->sa_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 *ip)
+{
+ return iface_find(ip, true) ? true : false;
+}
+
+/****************************************************************************
+ Add an interface to the linked list of interfaces.
+****************************************************************************/
+
+static void add_interface(const struct iface_struct *ifs)
+{
+ char addr[INET6_ADDRSTRLEN];
+ struct interface *iface;
+
+ if (iface_find((const struct sockaddr *)&ifs->ip, False)) {
+ DEBUG(3,("add_interface: not adding duplicate interface %s\n",
+ print_sockaddr(addr, sizeof(addr), &ifs->ip) ));
+ return;
+ }
+
+ if (!(ifs->flags & (IFF_BROADCAST|IFF_LOOPBACK))) {
+ DEBUG(3,("not adding non-broadcast interface %s\n",
+ ifs->name ));
+ return;
+ }
+
+ iface = SMB_MALLOC_P(struct interface);
+ if (!iface) {
+ return;
+ }
+
+ ZERO_STRUCTPN(iface);
+
+ 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;
+ iface->linkspeed = ifs->linkspeed;
+ iface->capability = ifs->capability;
+ iface->if_index = ifs->if_index;
+
+ DLIST_ADD(local_interfaces, iface);
+
+ 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) ));
+}
+
+
+static void parse_extra_info(char *key, uint64_t *speed, uint32_t *cap,
+ uint32_t *if_index)
+{
+ while (key != NULL && *key != '\0') {
+ char *next_key;
+ char *val;
+ int error = 0;
+
+ next_key = strchr_m(key, ',');
+ if (next_key != NULL) {
+ *next_key++ = 0;
+ }
+
+ val = strchr_m(key, '=');
+ if (val != NULL) {
+ *val++ = 0;
+
+ if (strequal_m(key, "speed")) {
+ *speed = (uint64_t)smb_strtoull(val,
+ NULL,
+ 0,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ DBG_DEBUG("Invalid speed value (%s)\n", val);
+ }
+ } else if (strequal_m(key, "capability")) {
+ if (strequal_m(val, "RSS")) {
+ *cap |= FSCTL_NET_IFACE_RSS_CAPABLE;
+ } else if (strequal(val, "RDMA")) {
+ *cap |= FSCTL_NET_IFACE_RDMA_CAPABLE;
+ } else {
+ DBG_WARNING("Capability unknown: "
+ "'%s'\n", val);
+ }
+ } else if (strequal_m(key, "if_index")) {
+ *if_index = (uint32_t)smb_strtoul(val,
+ NULL,
+ 0,
+ &error,
+ SMB_STR_STANDARD);
+ if (error != 0) {
+ DBG_DEBUG("Invalid key value (%s)\n", val);
+ }
+ } else {
+ DBG_DEBUG("Key unknown: '%s'\n", key);
+ }
+ }
+
+ key = next_key;
+ }
+}
+
+/****************************************************************************
+ Interpret a single element from a interfaces= config line.
+
+ This handles the following different forms:
+
+ 1) wildcard interface name
+ 2) DNS name
+ 3) IP/masklen
+ 4) ip/mask
+ 5) bcast/mask
+
+ Additional information for an interface can be specified with
+ this extended syntax:
+
+ "interface[;key1=value1[,key2=value2[...]]]"
+
+ Note: The double quoting is important for the
+ smb.conf parser! Otherwise the ';' and ',' separates
+ two interfaces.
+
+ where
+ - keys known: 'speed', 'capability', 'if_index'
+ - speed is in bits per second
+ - capabilites known: 'RSS', 'RDMA'
+ - if_index should be used with care, because
+ these indexes should not conicide with indexes
+ the kernel sets...
+
+ Note: The specified values overwrite the autodetected values!
+
+****************************************************************************/
+
+static void interpret_interface(char *token)
+{
+ 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;
+ bool added=false;
+ bool goodaddr = false;
+ uint64_t speed = 0;
+ uint32_t cap = FSCTL_NET_IFACE_NONE_CAPABLE;
+ uint32_t if_index = 0;
+ bool speed_set = false;
+ bool cap_set = false;
+ bool if_index_set = false;
+
+ /*
+ * extract speed / capability information if present
+ */
+ p = strchr_m(token, ';');
+ if (p != NULL) {
+ *p++ = 0;
+ parse_extra_info(p, &speed, &cap, &if_index);
+ if (speed != 0) {
+ speed_set = true;
+ }
+ if (cap != FSCTL_NET_IFACE_NONE_CAPABLE) {
+ cap_set = true;
+ }
+ if (if_index != 0) {
+ if_index_set = true;
+ }
+ }
+
+ /* first check if it is an interface name */
+ for (i=0;i<total_probed;i++) {
+ if (gen_fnmatch(token, probed_ifaces[i].name) == 0) {
+ if (speed_set) {
+ probed_ifaces[i].linkspeed = speed;
+ }
+ if (cap_set) {
+ probed_ifaces[i].capability = cap;
+ }
+ if (if_index_set) {
+ probed_ifaces[i].if_index = if_index;
+ }
+ add_interface(&probed_ifaces[i]);
+ added = true;
+ }
+ }
+ if (added) {
+ return;
+ }
+
+ p = strchr_m(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 (sockaddr_equal((struct sockaddr *)&ss,
+ (struct sockaddr *)&probed_ifaces[i].ip))
+ {
+ if (speed_set) {
+ probed_ifaces[i].linkspeed = speed;
+ }
+ if (cap_set) {
+ probed_ifaces[i].capability = cap;
+ }
+ if (if_index_set) {
+ probed_ifaces[i].if_index = if_index;
+ }
+ add_interface(&probed_ifaces[i]);
+ return;
+ }
+ }
+ DEBUG(2,("interpret_interface: "
+ "can't determine interface for %s\n",
+ token));
+ return;
+ }
+
+ /* parse it into an IP address/netmasklength pair */
+ *p = 0;
+ 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) {
+ goodaddr = interpret_string_addr(&ss_mask, p, 0);
+ if (!goodaddr) {
+ DEBUG(2,("interpret_interface: "
+ "can't determine netmask from %s\n",
+ p));
+ return;
+ }
+ } else {
+ int error = 0;
+ unsigned long val;
+
+ val = smb_strtoul(p, NULL, 0, &error, SMB_STR_FULL_STR_CONV);
+ if (error != 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;
+ }
+ }
+
+ make_bcast(&ss_bcast, &ss, &ss_mask);
+ make_net(&ss_net, &ss, &ss_mask);
+
+ /* Maybe the first component was a broadcast address. */
+ if (sockaddr_equal((struct sockaddr *)&ss_bcast, (struct sockaddr *)&ss) ||
+ sockaddr_equal((struct sockaddr *)&ss_net, (struct sockaddr *)&ss)) {
+ for (i=0;i<total_probed;i++) {
+ if (same_net((struct sockaddr *)&ss,
+ (struct sockaddr *)&probed_ifaces[i].ip,
+ (struct sockaddr *)&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));
+ if (speed_set) {
+ probed_ifaces[i].linkspeed = speed;
+ }
+ if (cap_set) {
+ probed_ifaces[i].capability = cap;
+ }
+ if (if_index_set) {
+ probed_ifaces[i].if_index = if_index;
+ }
+ add_interface(&probed_ifaces[i]);
+ probed_ifaces[i].netmask = saved_mask;
+ return;
+ }
+ }
+ DEBUG(2,("interpret_interface: Can't determine ip for "
+ "broadcast address %s\n",
+ token));
+ return;
+ }
+
+ /* 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;
+ if (if_index_set) {
+ ifs.if_index = if_index;
+ }
+ if (speed_set) {
+ ifs.linkspeed = speed;
+ } else {
+ ifs.linkspeed = 1000 * 1000 * 1000;
+ }
+ ifs.capability = cap;
+ add_interface(&ifs);
+}
+
+/****************************************************************************
+ Load the list of network interfaces.
+****************************************************************************/
+
+void load_interfaces(void)
+{
+ struct iface_struct *ifaces = NULL;
+ const char **ptr = lp_interfaces();
+ int i;
+
+ gfree_interfaces();
+
+ /* Probe the kernel for interfaces */
+ total_probed = get_interfaces(talloc_tos(), &ifaces);
+
+ if (total_probed > 0) {
+ probed_ifaces = (struct iface_struct *)smb_memdup(ifaces,
+ sizeof(ifaces[0])*total_probed);
+ if (!probed_ifaces) {
+ DEBUG(0,("ERROR: smb_memdup failed\n"));
+ exit(1);
+ }
+ }
+ TALLOC_FREE(ifaces);
+
+ /* 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"));
+ exit(1);
+ }
+ for (i=0;i<total_probed;i++) {
+ if (probed_ifaces[i].flags & IFF_BROADCAST) {
+ add_interface(&probed_ifaces[i]);
+ }
+ }
+ return;
+ }
+
+ if (ptr) {
+ while (*ptr) {
+ char *ptr_cpy = SMB_STRDUP(*ptr);
+ if (ptr_cpy) {
+ interpret_interface(ptr_cpy);
+ free(ptr_cpy);
+ }
+ ptr++;
+ }
+ }
+
+ if (!local_interfaces) {
+ DEBUG(0,("WARNING: no network interfaces found\n"));
+ }
+}
+
+
+void gfree_interfaces(void)
+{
+ while (local_interfaces) {
+ struct interface *iface = local_interfaces;
+ DLIST_REMOVE(local_interfaces, local_interfaces);
+ SAFE_FREE(iface->name);
+ SAFE_FREE(iface);
+ }
+
+ SAFE_FREE(probed_ifaces);
+}
+
+/****************************************************************************
+ Return True if the list of probed interfaces has changed.
+****************************************************************************/
+
+bool interfaces_changed(void)
+{
+ bool ret = false;
+ int n;
+ struct iface_struct *ifaces = NULL;
+
+ n = get_interfaces(talloc_tos(), &ifaces);
+
+ if ((n > 0 )&& (n != total_probed ||
+ memcmp(ifaces, probed_ifaces, sizeof(ifaces[0])*n))) {
+ ret = true;
+ }
+
+ TALLOC_FREE(ifaces);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-10 18:52:44 +0000