summaryrefslogtreecommitdiff
path: root/src/openvpn/tun.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/openvpn/tun.c')
-rw-r--r--src/openvpn/tun.c231
1 files changed, 166 insertions, 65 deletions
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 923131a..9eeaed0 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -68,7 +68,7 @@ const static GUID GUID_DEVINTERFACE_NET = { 0xcac88484, 0x7515, 0x4c03, { 0x82,
#define NI_OPTIONS (1<<2)
static void netsh_ifconfig(const struct tuntap_options *to,
- const char *flex_name,
+ DWORD adapter_index,
const in_addr_t ip,
const in_addr_t netmask,
const unsigned int flags);
@@ -79,7 +79,7 @@ static void windows_set_mtu(const int iface_index,
static void netsh_set_dns6_servers(const struct in6_addr *addr_list,
const int addr_len,
- const char *flex_name);
+ DWORD adapter_index);
static void netsh_command(const struct argv *a, int n, int msglevel);
@@ -115,11 +115,17 @@ do_address_service(const bool add, const short family, const struct tuntap *tt)
{
addr.address.ipv4.s_addr = htonl(tt->local);
addr.prefix_len = netmask_to_netbits2(tt->adapter_netmask);
+ msg(D_IFCONFIG, "INET address service: %s %s/%d",
+ add ? "add" : "remove",
+ print_in_addr_t(tt->local, 0, &gc), addr.prefix_len);
}
else
{
addr.address.ipv6 = tt->local_ipv6;
- addr.prefix_len = tt->netbits_ipv6;
+ addr.prefix_len = (tt->type == DEV_TYPE_TUN) ? 128 : tt->netbits_ipv6;
+ msg(D_IFCONFIG, "INET6 address service: %s %s/%d",
+ add ? "add" : "remove",
+ print_in6_addr(tt->local_ipv6, 0, &gc), addr.prefix_len);
}
if (!send_msg_iservice(pipe, &addr, sizeof(addr), &ack, "TUN"))
@@ -143,6 +149,61 @@ out:
}
static bool
+do_dns_domain_service(bool add, const struct tuntap *tt)
+{
+ bool ret = false;
+ ack_message_t ack;
+ struct gc_arena gc = gc_new();
+ HANDLE pipe = tt->options.msg_channel;
+
+ if (!tt->options.domain) /* no domain to add or delete */
+ {
+ return true;
+ }
+
+ /* Use dns_cfg_msg with addr_len = 0 for setting only the DOMAIN */
+ dns_cfg_message_t dns = {
+ .header = {
+ (add ? msg_add_dns_cfg : msg_del_dns_cfg),
+ sizeof(dns_cfg_message_t),
+ 0
+ },
+ .iface = { .index = tt->adapter_index, .name = "" },
+ .domains = "", /* set below */
+ .family = AF_INET, /* unused */
+ .addr_len = 0 /* add/delete only the domain, not DNS servers */
+ };
+
+ strncpynt(dns.iface.name, tt->actual_name, sizeof(dns.iface.name));
+ strncpynt(dns.domains, tt->options.domain, sizeof(dns.domains));
+ /* truncation of domain name is not checked as it can't happen
+ * with 512 bytes room in dns.domains.
+ */
+
+ msg(D_LOW, "%s dns domain on '%s' (if_index = %d) using service",
+ (add ? "Setting" : "Deleting"), dns.iface.name, dns.iface.index);
+ if (!send_msg_iservice(pipe, &dns, sizeof(dns), &ack, "TUN"))
+ {
+ goto out;
+ }
+
+ if (ack.error_number != NO_ERROR)
+ {
+ msg(M_WARN, "TUN: %s dns domain failed using service: %s [status=%u if_name=%s]",
+ (add ? "adding" : "deleting"), strerror_win32(ack.error_number, &gc),
+ ack.error_number, dns.iface.name);
+ goto out;
+ }
+
+ msg(M_INFO, "DNS domain %s using service", (add ? "set" : "deleted"));
+ ret = true;
+
+out:
+ gc_free(&gc);
+ return ret;
+}
+
+static bool
do_dns_service(bool add, const short family, const struct tuntap *tt)
{
bool ret = false;
@@ -158,6 +219,7 @@ do_dns_service(bool add, const short family, const struct tuntap *tt)
return true;
}
+ /* Use dns_cfg_msg with domain = "" for setting only the DNS servers */
dns_cfg_message_t dns = {
.header = {
(add ? msg_add_dns_cfg : msg_del_dns_cfg),
@@ -1088,26 +1150,40 @@ do_ifconfig_ipv6(struct tuntap *tt, const char *ifname, int tun_mtu,
else if (tt->options.msg_channel)
{
do_address_service(true, AF_INET6, tt);
- add_route_connected_v6_net(tt, es);
+ if (tt->type == DEV_TYPE_TUN)
+ {
+ add_route_connected_v6_net(tt, es);
+ }
do_dns_service(true, AF_INET6, tt);
do_set_mtu_service(tt, AF_INET6, tun_mtu);
+ /* If IPv4 is not enabled, set DNS domain here */
+ if (!tt->did_ifconfig_setup)
+ {
+ do_dns_domain_service(true, tt);
+ }
}
else
{
- /* example: netsh interface ipv6 set address interface=42
- * 2001:608:8003::d store=active
+ /* example: netsh interface ipv6 set address 42
+ * 2001:608:8003::d/bits store=active
+ */
+
+ /* in TUN mode, we only simulate a subnet, so the interface
+ * is configured with /128 + a route to fe80::8. In TAP mode,
+ * the correct netbits must be set, and no on-link route
*/
- char iface[64];
+ int netbits = (tt->type == DEV_TYPE_TUN) ? 128 : tt->netbits_ipv6;
- openvpn_snprintf(iface, sizeof(iface), "interface=%lu",
- tt->adapter_index);
- argv_printf(&argv, "%s%s interface ipv6 set address %s %s store=active",
- get_win_sys_path(), NETSH_PATH_SUFFIX, iface,
- ifconfig_ipv6_local);
+ argv_printf(&argv, "%s%s interface ipv6 set address %lu %s/%d store=active",
+ get_win_sys_path(), NETSH_PATH_SUFFIX, tt->adapter_index,
+ ifconfig_ipv6_local, netbits);
netsh_command(&argv, 4, M_FATAL);
- add_route_connected_v6_net(tt, es);
+ if (tt->type == DEV_TYPE_TUN)
+ {
+ add_route_connected_v6_net(tt, es);
+ }
/* set ipv6 dns servers if any are specified */
- netsh_set_dns6_servers(tt->options.dns6, tt->options.dns6_len, ifname);
+ netsh_set_dns6_servers(tt->options.dns6, tt->options.dns6_len, tt->adapter_index);
windows_set_mtu(tt->adapter_index, AF_INET6, tun_mtu);
}
#else /* platforms we have no IPv6 code for */
@@ -1224,7 +1300,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
argv_printf(&argv, "%s %s netmask 255.255.255.255", IFCONFIG_PATH,
ifname);
}
- else if (tt->topology == TOP_SUBNET)
+ else if (tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
argv_printf(&argv, "%s %s %s %s netmask %s mtu %d up", IFCONFIG_PATH,
ifname, ifconfig_local, ifconfig_local,
@@ -1243,7 +1319,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
solaris_error_close(tt, es, ifname, false);
}
- if (!tun && tt->topology == TOP_SUBNET)
+ if (!tun && tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
/* Add a network route for the local tun interface */
struct route_ipv4 r;
@@ -1274,7 +1350,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
IFCONFIG_PATH, ifname, ifconfig_local,
ifconfig_remote_netmask, tun_mtu);
}
- else if (tt->topology == TOP_SUBNET)
+ else if (tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
remote_end = create_arbitrary_remote( tt );
argv_printf(&argv, "%s %s %s %s mtu %d netmask %s up -link0",
@@ -1292,7 +1368,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
openvpn_execve_check(&argv, es, S_FATAL, "OpenBSD ifconfig failed");
/* Add a network route for the local tun interface */
- if (!tun && tt->topology == TOP_SUBNET)
+ if (!tun && tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
struct route_ipv4 r;
CLEAR(r);
@@ -1312,7 +1388,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
IFCONFIG_PATH, ifname, ifconfig_local,
ifconfig_remote_netmask, tun_mtu);
}
- else if (tt->topology == TOP_SUBNET)
+ else if (tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
remote_end = create_arbitrary_remote(tt);
argv_printf(&argv, "%s %s %s %s mtu %d netmask %s up", IFCONFIG_PATH,
@@ -1334,7 +1410,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
openvpn_execve_check(&argv, es, S_FATAL, "NetBSD ifconfig failed");
/* Add a network route for the local tun interface */
- if (!tun && tt->topology == TOP_SUBNET)
+ if (!tun && tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
struct route_ipv4 r;
CLEAR(r);
@@ -1366,7 +1442,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
}
else
{
- if (tt->topology == TOP_SUBNET)
+ if (tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
argv_printf(&argv, "%s %s %s %s netmask %s mtu %d up",
IFCONFIG_PATH, ifname, ifconfig_local, ifconfig_local,
@@ -1384,7 +1460,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
openvpn_execve_check(&argv, es, S_FATAL, "Mac OS X ifconfig failed");
/* Add a network route for the local tun interface */
- if (!tun && tt->topology == TOP_SUBNET)
+ if (!tun && tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
struct route_ipv4 r;
CLEAR(r);
@@ -1406,7 +1482,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
IFCONFIG_PATH, ifname, ifconfig_local,
ifconfig_remote_netmask, tun_mtu);
}
- else if (tt->topology == TOP_SUBNET)
+ else if (tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
remote_end = create_arbitrary_remote( tt );
argv_printf(&argv, "%s %s %s %s mtu %d netmask %s up", IFCONFIG_PATH,
@@ -1423,7 +1499,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
openvpn_execve_check(&argv, es, S_FATAL, "FreeBSD ifconfig failed");
/* Add a network route for the local tun interface */
- if (!tun && tt->topology == TOP_SUBNET)
+ if (!tun && tt->type == DEV_TYPE_TUN && tt->topology == TOP_SUBNET)
{
struct route_ipv4 r;
CLEAR(r);
@@ -1455,8 +1531,6 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
env_set_destroy(aix_es);
}
#elif defined (_WIN32)
- ASSERT(ifname != NULL);
-
if (tt->options.ip_win32_type == IPW32_SET_MANUAL)
{
msg(M_INFO,
@@ -1472,10 +1546,11 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu,
{
do_address_service(true, AF_INET, tt);
do_dns_service(true, AF_INET, tt);
+ do_dns_domain_service(true, tt);
}
else if (tt->options.ip_win32_type == IPW32_SET_NETSH)
{
- netsh_ifconfig(&tt->options, ifname, tt->local,
+ netsh_ifconfig(&tt->options, tt->adapter_index, tt->local,
tt->adapter_netmask, NI_IP_NETMASK|NI_OPTIONS);
}
if (tt->options.msg_channel)
@@ -1993,6 +2068,11 @@ open_tun(const char *dev, const char *dev_type, const char *dev_node, struct tun
#ifdef ENABLE_FEATURE_TUN_PERSIST
+/* TUNSETGROUP appeared in 2.6.23 */
+#ifndef TUNSETGROUP
+# define TUNSETGROUP _IOW('T', 206, int)
+#endif
+
void
tuncfg(const char *dev, const char *dev_type, const char *dev_node,
int persist_mode, const char *username, const char *groupname,
@@ -2032,7 +2112,7 @@ tuncfg(const char *dev, const char *dev_type, const char *dev_node,
}
else if (ioctl(tt->fd, TUNSETGROUP, platform_state_group.gr->gr_gid) < 0)
{
- msg(M_ERR, "Cannot ioctl TUNSETOWNER(%s) %s", groupname, dev);
+ msg(M_ERR, "Cannot ioctl TUNSETGROUP(%s) %s", groupname, dev);
}
}
close_tun(tt, ctx);
@@ -5263,23 +5343,29 @@ ip_addr_member_of(const in_addr_t addr, const IP_ADDR_STRING *ias)
* Set the ipv6 dns servers on the specified interface.
* The list of dns servers currently set on the interface
* are cleared first.
- * No action is taken if number of addresses (addr_len) < 1.
*/
static void
netsh_set_dns6_servers(const struct in6_addr *addr_list,
const int addr_len,
- const char *flex_name)
+ DWORD adapter_index)
{
struct gc_arena gc = gc_new();
struct argv argv = argv_new();
+ /* delete existing DNS settings from TAP interface */
+ argv_printf(&argv, "%s%s interface ipv6 delete dns %lu all",
+ get_win_sys_path(),
+ NETSH_PATH_SUFFIX,
+ adapter_index);
+ netsh_command(&argv, 2, M_FATAL);
+
for (int i = 0; i < addr_len; ++i)
{
const char *fmt = (i == 0) ?
- "%s%s interface ipv6 set dns %s static %s"
- : "%s%s interface ipv6 add dns %s %s";
+ "%s%s interface ipv6 set dns %lu static %s"
+ : "%s%s interface ipv6 add dns %lu %s";
argv_printf(&argv, fmt, get_win_sys_path(),
- NETSH_PATH_SUFFIX, flex_name,
+ NETSH_PATH_SUFFIX, adapter_index,
print_in6_addr(addr_list[i], 0, &gc));
/* disable slow address validation on Windows 7 and higher */
@@ -5301,7 +5387,7 @@ netsh_ifconfig_options(const char *type,
const in_addr_t *addr_list,
const int addr_len,
const IP_ADDR_STRING *current,
- const char *flex_name,
+ DWORD adapter_index,
const bool test_first)
{
struct gc_arena gc = gc_new();
@@ -5325,11 +5411,11 @@ netsh_ifconfig_options(const char *type,
/* delete existing DNS/WINS settings from TAP interface */
if (delete_first)
{
- argv_printf(&argv, "%s%s interface ip delete %s %s all",
+ argv_printf(&argv, "%s%s interface ip delete %s %lu all",
get_win_sys_path(),
NETSH_PATH_SUFFIX,
type,
- flex_name);
+ adapter_index);
netsh_command(&argv, 2, M_FATAL);
}
@@ -5342,14 +5428,14 @@ netsh_ifconfig_options(const char *type,
if (delete_first || !test_first || !ip_addr_member_of(addr_list[i], current))
{
const char *fmt = count ?
- "%s%s interface ip add %s %s %s"
- : "%s%s interface ip set %s %s static %s";
+ "%s%s interface ip add %s %lu %s"
+ : "%s%s interface ip set %s %lu static %s";
argv_printf(&argv, fmt,
get_win_sys_path(),
NETSH_PATH_SUFFIX,
type,
- flex_name,
+ adapter_index,
print_in_addr_t(addr_list[i], 0, &gc));
/* disable slow address validation on Windows 7 and higher */
@@ -5365,8 +5451,8 @@ netsh_ifconfig_options(const char *type,
}
else
{
- msg(M_INFO, "NETSH: \"%s\" %s %s [already set]",
- flex_name,
+ msg(M_INFO, "NETSH: %lu %s %s [already set]",
+ adapter_index,
type,
print_in_addr_t(addr_list[i], 0, &gc));
}
@@ -5397,7 +5483,7 @@ init_ip_addr_string2(IP_ADDR_STRING *dest, const IP_ADDR_STRING *src1, const IP_
static void
netsh_ifconfig(const struct tuntap_options *to,
- const char *flex_name,
+ DWORD adapter_index,
const in_addr_t ip,
const in_addr_t netmask,
const unsigned int flags)
@@ -5410,27 +5496,26 @@ netsh_ifconfig(const struct tuntap_options *to,
if (flags & NI_TEST_FIRST)
{
const IP_ADAPTER_INFO *list = get_adapter_info_list(&gc);
- const int index = get_adapter_index_flexible(flex_name);
- ai = get_adapter(list, index);
- pai = get_per_adapter_info(index, &gc);
+ ai = get_adapter(list, adapter_index);
+ pai = get_per_adapter_info(adapter_index, &gc);
}
if (flags & NI_IP_NETMASK)
{
if (test_adapter_ip_netmask(ai, ip, netmask))
{
- msg(M_INFO, "NETSH: \"%s\" %s/%s [already set]",
- flex_name,
+ msg(M_INFO, "NETSH: %lu %s/%s [already set]",
+ adapter_index,
print_in_addr_t(ip, 0, &gc),
print_in_addr_t(netmask, 0, &gc));
}
else
{
- /* example: netsh interface ip set address my-tap static 10.3.0.1 255.255.255.0 */
- argv_printf(&argv, "%s%s interface ip set address %s static %s %s",
+ /* example: netsh interface ip set address 42 static 10.3.0.1 255.255.255.0 */
+ argv_printf(&argv, "%s%s interface ip set address %lu static %s %s",
get_win_sys_path(),
NETSH_PATH_SUFFIX,
- flex_name,
+ adapter_index,
print_in_addr_t(ip, 0, &gc),
print_in_addr_t(netmask, 0, &gc));
@@ -5449,7 +5534,7 @@ netsh_ifconfig(const struct tuntap_options *to,
to->dns,
to->dns_len,
pai ? &pai->DnsServerList : NULL,
- flex_name,
+ adapter_index,
BOOL_CAST(flags & NI_TEST_FIRST));
if (ai && ai->HaveWins)
{
@@ -5460,7 +5545,7 @@ netsh_ifconfig(const struct tuntap_options *to,
to->wins,
to->wins_len,
ai ? wins : NULL,
- flex_name,
+ adapter_index,
BOOL_CAST(flags & NI_TEST_FIRST));
}
@@ -5469,16 +5554,16 @@ netsh_ifconfig(const struct tuntap_options *to,
}
static void
-netsh_enable_dhcp(const char *actual_name)
+netsh_enable_dhcp(DWORD adapter_index)
{
struct argv argv = argv_new();
- /* example: netsh interface ip set address my-tap dhcp */
+ /* example: netsh interface ip set address 42 dhcp */
argv_printf(&argv,
- "%s%s interface ip set address %s dhcp",
+ "%s%s interface ip set address %lu dhcp",
get_win_sys_path(),
NETSH_PATH_SUFFIX,
- actual_name);
+ adapter_index);
netsh_command(&argv, 4, M_FATAL);
@@ -5624,7 +5709,7 @@ tun_standby(struct tuntap *tt)
{
msg(M_INFO, "NOTE: now trying netsh (this may take some time)");
netsh_ifconfig(&tt->options,
- tt->actual_name,
+ tt->adapter_index,
tt->local,
tt->adapter_netmask,
NI_TEST_FIRST|NI_IP_NETMASK|NI_OPTIONS);
@@ -6529,7 +6614,7 @@ tuntap_set_ip_props(const struct tuntap *tt, bool *dhcp_masq, bool *dhcp_masq_po
}
else
{
- netsh_enable_dhcp(tt->actual_name);
+ netsh_enable_dhcp(tt->adapter_index);
}
}
*dhcp_masq = true;
@@ -6543,7 +6628,7 @@ tuntap_set_ip_props(const struct tuntap *tt, bool *dhcp_masq, bool *dhcp_masq_po
if (dhcp_status(tt->adapter_index) != DHCP_STATUS_ENABLED)
{
netsh_ifconfig(&tt->options,
- tt->actual_name,
+ tt->adapter_index,
tt->local,
tt->adapter_netmask,
NI_TEST_FIRST | NI_IP_NETMASK | NI_OPTIONS);
@@ -6675,15 +6760,25 @@ netsh_delete_address_dns(const struct tuntap *tt, bool ipv6, struct gc_arena *gc
if (len > 0)
{
argv_printf(&argv,
- "%s%s interface %s delete dns %s all",
+ "%s%s interface %s delete dns %lu all",
get_win_sys_path(),
NETSH_PATH_SUFFIX,
ipv6 ? "ipv6" : "ipv4",
- tt->actual_name);
+ tt->adapter_index);
netsh_command(&argv, 1, M_WARN);
}
- if (ipv6)
+ if (!ipv6 && tt->options.wins_len > 0)
+ {
+ argv_printf(&argv,
+ "%s%s interface ipv4 delete winsservers %lu all",
+ get_win_sys_path(),
+ NETSH_PATH_SUFFIX,
+ tt->adapter_index);
+ netsh_command(&argv, 1, M_WARN);
+ }
+
+ if (ipv6 && tt->type == DEV_TYPE_TUN)
{
delete_route_connected_v6_net(tt);
}
@@ -6692,7 +6787,7 @@ netsh_delete_address_dns(const struct tuntap *tt, bool ipv6, struct gc_arena *gc
* address we added (pointed out by Cedric Tabary).
*/
- /* netsh interface ipvX delete address \"%s\" %s */
+ /* netsh interface ipvX delete address %lu %s */
if (ipv6)
{
ifconfig_ip_local = print_in6_addr(tt->local_ipv6, 0, gc);
@@ -6702,11 +6797,11 @@ netsh_delete_address_dns(const struct tuntap *tt, bool ipv6, struct gc_arena *gc
ifconfig_ip_local = print_in_addr_t(tt->local, 0, gc);
}
argv_printf(&argv,
- "%s%s interface %s delete address %s %s store=active",
+ "%s%s interface %s delete address %lu %s store=active",
get_win_sys_path(),
NETSH_PATH_SUFFIX,
ipv6 ? "ipv6" : "ipv4",
- tt->actual_name,
+ tt->adapter_index,
ifconfig_ip_local);
netsh_command(&argv, 1, M_WARN);
@@ -6728,6 +6823,11 @@ close_tun(struct tuntap *tt, openvpn_net_ctx_t *ctx)
}
else if (tt->options.msg_channel)
{
+ /* If IPv4 is not enabled, delete DNS domain here */
+ if (!tt->did_ifconfig_setup)
+ {
+ do_dns_domain_service(false, tt);
+ }
if (tt->options.dns6_len > 0)
{
do_dns_service(false, AF_INET6, tt);
@@ -6753,6 +6853,7 @@ close_tun(struct tuntap *tt, openvpn_net_ctx_t *ctx)
}
else if (tt->options.msg_channel)
{
+ do_dns_domain_service(false, tt);
do_dns_service(false, AF_INET, tt);
do_address_service(false, AF_INET, tt);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-12 09:55:53 +0000