Merge branch 'namespace' into 'master'

add basic namespace support for listen address

See merge request openconnect/ocserv!189

.gitlab-ci.yml

@@ -281,7 +281,7 @@ noprocfs/Fedora:
   - chmod -R o-w tests/data/raddb
   - git submodule update --init
   - autoreconf -fvi
-  - ac_cv_file_FILE__proc_self_exe=no ./configure --disable-maintainer-mode --without-docker-tests
+  - ac_cv_file_FILE__proc_self_exe=no ./configure --disable-maintainer-mode --without-docker-tests --disable-namespaces
   - make -j$JOBS
   tags:
   - shared

configure.ac

@@ -426,6 +426,14 @@ AC_LIB_HAVE_LINKFLAGS(systemd,, [#include <systemd/sd-daemon.h>], [sd_listen_fds
  fi
 fi
 
+AC_ARG_ENABLE(namespaces,
+  AS_HELP_STRING([--disable-namespaces], [disable namespaces support]),
+    namespaces_enabled=$enableval, namespaces_enabled=yes)
+
+if [ test "$namespaces_enabled" = "yes" ];then
+	AC_DEFINE([LINUX_NAMESPACES], [], [Enable Linux namespaces])
+fi
+
 AC_ARG_ENABLE(anyconnect-compat,
   AS_HELP_STRING([--disable-anyconnect-compat], [disable Anyconnect client compatibility (experimental)]),
     anyconnect_enabled=$enableval, anyconnect_enabled=yes)
@@ -694,6 +702,7 @@ Summary of build options:
   OIDC Auth backend:    ${enable_oidc_auth}
   Anyconnect compat:    ${anyconnect_enabled}
   TCP wrappers:         ${libwrap_enabled}
+  namespaces:           ${namespaces_enabled}
   systemd:              ${systemd_enabled}
   (socket activation)
   worker isolation:     ${isolation}

doc/sample.config

@@ -86,6 +86,9 @@ auth = "plain[passwd=./sample.passwd]"
 # reconnects.
 #listen-host-is-dyndns = true
 
+# move the listen socket within the specified network namespace
+# listen-netns = "foo"
+
 # TCP and UDP port number
 tcp-port = 443
 udp-port = 443

src/Makefile.am

@@ -28,7 +28,7 @@ ocserv_SOURCES = $(CORE_SOURCES) $(AUTH_SOURCES) $(ACCT_SOURCES) \
 	proc-search.h route-add.c route-add.h sec-mod.c sec-mod.h sec-mod-acct.h \
 	sec-mod-auth.c sec-mod-auth.h sec-mod-cookies.c sec-mod-db.c \
 	sec-mod-resume.c sec-mod-resume.h sec-mod-sup-config.c sec-mod-sup-config.h \
-	common/sockdiag.h common/sockdiag.c
+	common/sockdiag.h common/sockdiag.c namespace.c
 
 ocserv_LDADD = $(CORE_LDADD)
 
@@ -62,7 +62,7 @@ CORE_SOURCES = $(CCAN_SOURCES) $(HTTP_PARSER_SOURCES) \
 	script-list.h setproctitle.c setproctitle.h str.c str.h subconfig.c \
 	sup-config/file.c sup-config/file.h sup-config/radius.c \
 	sup-config/radius.h tlslib.c tlslib.h tun.c tun.h valid-hostname.c \
-	vasprintf.c vasprintf.h vhost.h vpn.h 
+	vasprintf.c vasprintf.h vhost.h vpn.h namespace.h
 
 if ENABLE_LATENCY_SUPPORT
 ocserv_worker_SOURCES += worker-latency.c worker-latency.h

src/config.c

@@ -743,6 +743,8 @@ static int cfg_ini_handler(void *_ctx, const char *section, const char *name, co
 		} else if (strcmp(name, "listen-clear-file") == 0) {
 			if (!PWARN_ON_VHOST_STRDUP(vhost->name, "listen-clear-file", unix_conn_file))
 				PREAD_STRING(pool, vhost->perm_config.unix_conn_file);
+		} else if (strcmp(name, "listen-netns") == 0) {
+			vhost->perm_config.listen_netns_name = talloc_strdup(pool, value);
 		} else if (strcmp(name, "tcp-port") == 0) {
 			if (!PWARN_ON_VHOST(vhost->name, "tcp-port", port))
 				READ_NUMERIC(vhost->perm_config.port);

src/main.c

@@ -67,6 +67,7 @@
 #include <snapshot.h>
 #include <isolate.h>
 #include <sockdiag.h>
+#include <namespace.h>
 
 #ifdef HAVE_GSSAPI
 # include <libtasn1.h>
@@ -168,8 +169,8 @@ static void set_common_socket_options(int fd)
 }
 
 static 
-int _listen_ports(void *pool, struct perm_cfg_st* config, 
-		struct addrinfo *res, struct listen_list_st *list)
+int _listen_ports(void *pool, struct perm_cfg_st* config, struct addrinfo *res,
+		struct listen_list_st *list, struct netns_fds *netns)
 {
 	struct addrinfo *ptr;
 	int s, y;
@@ -192,8 +193,8 @@ int _listen_ports(void *pool, struct perm_cfg_st* config,
 				type, human_addr(ptr->ai_addr, ptr->ai_addrlen,
 					   buf, sizeof(buf)));
 
-		s = socket(ptr->ai_family, ptr->ai_socktype,
-			   ptr->ai_protocol);
+		s = socket_netns(netns, ptr->ai_family, ptr->ai_socktype,
+				ptr->ai_protocol);
 		if (s < 0) {
 			perror("socket() failed");
 			continue;
@@ -312,6 +313,7 @@ listen_ports(void *pool, struct perm_cfg_st* config,
 		struct listen_list_st *list)
 {
 	struct addrinfo hints, *res;
+	struct netns_fds netns = {-1, -1};
 	char portname[6];
 	int ret;
 #ifdef HAVE_LIBSYSTEMD
@@ -321,6 +323,11 @@ listen_ports(void *pool, struct perm_cfg_st* config,
 	list_head_init(&list->head);
 	list->total = 0;
 
+	if (config->listen_netns_name && open_namespaces(&netns, config) < 0) {
+		fprintf(stderr, "cannot init listen namespaces\n");
+		return -1;
+	}
+
 #ifdef HAVE_LIBSYSTEMD
 	/* Support for systemd socket-activatable service */
 	if ((fds=sd_listen_fds(0)) > 0) {
@@ -414,7 +421,7 @@ listen_ports(void *pool, struct perm_cfg_st* config,
 			return -1;
 		}
 
-		ret = _listen_ports(pool, config, res, list);
+		ret = _listen_ports(pool, config, res, list, &netns);
 		freeaddrinfo(res);
 
 		if (ret < 0) {
@@ -451,7 +458,7 @@ listen_ports(void *pool, struct perm_cfg_st* config,
 			return -1;
 		}
 
-		ret = _listen_ports(pool, config, res, list);
+		ret = _listen_ports(pool, config, res, list, &netns);
 		if (ret < 0) {
 			return -1;
 		}
@@ -459,6 +466,11 @@ listen_ports(void *pool, struct perm_cfg_st* config,
 		freeaddrinfo(res);
 	}
 
+	if (config->listen_netns_name && close_namespaces(&netns) < 0) {
+		fprintf(stderr, "cannot close listen namespaces\n");
+		return -1;
+	}
+
 	return 0;
 }
 

src/namespace.c

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2020 William Dauchy
+ *
+ * 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
+ * (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 <config.h>
+
+#if defined(LINUX_NAMESPACES)
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <common-config.h>
+#include <namespace.h>
+
+/* get default namespace file descriptor to be able to place fd in a given
+ * namespace
+ */
+static int init_default_namespace(void)
+{
+	char netns_path[PATH_MAX];
+	pid_t pid;
+	int error;
+	int fd;
+
+	pid = getpid();
+	if (snprintf(netns_path, sizeof(netns_path), "/proc/%d/ns/net", pid) < 0)
+		return -1;
+
+	fd = open(netns_path, O_RDONLY | O_CLOEXEC);
+	if (fd < 0) {
+		error = errno;
+		fprintf(stderr, "could not open default namespace %s: %s\n",
+			netns_path, strerror(error));
+	}
+	return fd;
+}
+
+/* opens namespace for outside communication */
+static int init_listen_namespace(const char *ns_name)
+{
+	char netns_path[PATH_MAX];
+	int error;
+	int fd;
+
+	if (snprintf(netns_path, sizeof(netns_path), "/var/run/netns/%s", ns_name) < 0)
+		return -1;
+
+	fd = open(netns_path, O_RDONLY | O_CLOEXEC);
+	if (fd < 0) {
+		error = errno;
+		fprintf(stderr, "could not open listen namespace %s: %s\n",
+			netns_path, strerror(error));
+	}
+	return fd;
+}
+
+/* open default and listen namespaces */
+int open_namespaces(struct netns_fds *netns, struct perm_cfg_st *config)
+{
+	netns->default_fd = init_default_namespace();
+	if (netns->default_fd < 0)
+		return -1;
+	netns->listen_fd = init_listen_namespace(config->listen_netns_name);
+	if (netns->listen_fd < 0)
+		return -1;
+	return 0;
+}
+
+/* close default and listen namespaces */
+int close_namespaces(struct netns_fds *netns)
+{
+	int ret = 0;
+
+	ret = close(netns->default_fd);
+	if (ret)
+		return ret;
+	ret = close(netns->listen_fd);
+	return ret;
+}
+
+/* opens a socket in the namespace described by <nsfd> */
+int socket_netns(const struct netns_fds *fds, int domain, int type, int protocol)
+{
+	int sock;
+
+	if (fds->default_fd >= 0 && fds->listen_fd && setns(fds->listen_fd, CLONE_NEWNET) == -1)
+		return -1;
+
+	sock = socket(domain, type, protocol);
+
+	if (fds->default_fd >= 0 && fds->listen_fd && setns(fds->default_fd, CLONE_NEWNET) == -1) {
+		if (sock >= 0)
+			close(sock);
+		return -1;
+	}
+	return sock;
+}
+
+#endif /* LINUX_NAMESPACES */

src/namespace.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 William Dauchy
+ *
+ * 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
+ * (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/>.
+ */
+
+#ifndef NAMESPACE_H
+# define NAMESPACE_H
+
+#include <config.h>
+
+struct netns_fds {
+	int default_fd;
+	int listen_fd;
+};
+
+#if defined(LINUX_NAMESPACES)
+
+int socket_netns(const struct netns_fds*, int domain, int type, int protocol);
+int open_namespaces(struct netns_fds *netns, struct perm_cfg_st *config);
+int close_namespaces(struct netns_fds *netns);
+
+#else /* __linux__ */
+
+#define open_namespaces(netns, config) (-1)
+#define close_namespaces(netns) (-1)
+
+static inline int socket_netns(__attribute__((unused)) const struct netns_fds* fds,
+			       int domain, int type, int protocol)
+{
+        return socket(domain, type, protocol);
+}
+
+#endif /* __linux__ */
+
+#endif

src/vpn.h

@@ -393,6 +393,7 @@ struct perm_cfg_st {
 	char *listen_host;
 	char *udp_listen_host;
 	char* unix_conn_file;
+	char *listen_netns_name;
 	unsigned int port;
 	unsigned int udp_port;
 

tests/Makefile.am

@@ -40,7 +40,7 @@ EXTRA_DIST = certs/ca-key.pem certs/ca.pem ns.sh common.sh certs/server-cert.pem
 	connect-ios-script data/apple-ios.config certs/kerberos-cert.pem \
 	data/kdc.conf data/krb5.conf data/k5.KERBEROS.TEST data/kadm5.acl \
 	data/ipv6-iface.config data/no-route-default.config data/no-route-group.config \
-	data/group-config/group1
+	data/group-config/group1 data/test-namespace-listen.config
 
 SUBDIRS = docker-ocserv
 
@@ -65,7 +65,7 @@ dist_check_SCRIPTS += haproxy-connect test-iroute test-multi-cookie test-pass-sc
 	test-cookie-timeout test-cookie-timeout-2 test-explicit-ip \
 	test-cookie-invalidation test-user-config test-append-routes test-ban \
 	multiple-routes json test-udp-listen-host test-max-same-1 test-script-multi-user \
-	apple-ios ipv6-iface
+	apple-ios ipv6-iface test-namespace-listen
 
 if RADIUS_ENABLED
 dist_check_SCRIPTS += radius-group radius-otp

tests/common.sh

@@ -73,7 +73,8 @@ update_config() {
 	       -e 's|@ROUTE1@|'${ROUTE1}'|g' "$file.$$.tmp" \
 	       -e 's|@ROUTE2@|'${ROUTE2}'|g' "$file.$$.tmp" \
 	       -e 's|@MATCH_CIPHERS@|'${MATCH_CIPHERS}'|g' "$file.$$.tmp" \
-	       -e 's|@OCCTL_SOCKET@|'${OCCTL_SOCKET}'|g' "$file.$$.tmp"
+	       -e 's|@OCCTL_SOCKET@|'${OCCTL_SOCKET}'|g' "$file.$$.tmp" \
+	       -e 's|@LISTEN_NS@|'${LISTEN_NS}'|g' "$file.$$.tmp"
 	CONFIG="$file.$$.tmp"
 }
 

tests/data/test-namespace-listen.config

@@ -0,0 +1,195 @@
+# User authentication method. Could be set multiple times and in that case
+# all should succeed.
+# Options: certificate, pam. 
+#auth = "certificate"
+auth = "plain[@SRCDIR@/data/test1.passwd]"
+#auth = "pam"
+
+isolate-workers = @ISOLATE_WORKERS@
+
+# A banner to be displayed on clients
+#banner = "Welcome"
+
+# Use listen-host to limit to specific IPs or to the IPs of a provided hostname.
+#listen-host = @ADDRESS@
+
+listen-netns = @LISTEN_NS@
+
+use-dbus = no
+
+# Limit the number of clients. Unset or set to zero for unlimited.
+#max-clients = 1024
+max-clients = 16
+
+# Limit the number of client connections to one every X milliseconds 
+# (X is the provided value). Set to zero for no limit.
+#rate-limit-ms = 100
+
+# Limit the number of identical clients (i.e., users connecting multiple times)
+# Unset or set to zero for unlimited.
+max-same-clients = 2
+
+# TCP and UDP port number
+tcp-port = @PORT@
+udp-port = @PORT@
+
+# Keepalive in seconds
+keepalive = 32400
+
+# Dead peer detection in seconds
+dpd = 440
+
+# MTU discovery (DPD must be enabled)
+try-mtu-discovery = false
+
+# The key and the certificates of the server
+# The key may be a file, or any URL supported by GnuTLS (e.g., 
+# tpmkey:uuid=xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx;storage=user
+# or pkcs11:object=my-vpn-key;object-type=private)
+#
+# There may be multiple certificate and key pairs and each key
+# should correspond to the preceding certificate.
+server-cert = @SRCDIR@/certs/server-cert.pem
+server-key = @SRCDIR@/certs/server-key.pem
+
+# Diffie-Hellman parameters. Only needed if you require support
+# for the DHE ciphersuites (by default this server supports ECDHE).
+# Can be generated using:
+# certtool --generate-dh-params --outfile /path/to/dh.pem
+#dh-params = /path/to/dh.pem
+
+# If you have a certificate from a CA that provides an OCSP
+# service you may provide a fresh OCSP status response within
+# the TLS handshake. That will prevent the client from connecting
+# independently on the OCSP server.
+# You can update this response periodically using:
+# ocsptool --ask --load-cert=your_cert --load-issuer=your_ca --outfile response
+# Make sure that you replace the following file in an atomic way.
+#ocsp-response = /path/to/ocsp.der
+
+# In case PKCS #11 or TPM keys are used the PINs should be available
+# in files. The srk-pin-file is applicable to TPM keys only (It's the storage
+# root key).
+#pin-file = /path/to/pin.txt
+#srk-pin-file = /path/to/srkpin.txt
+
+# The Certificate Authority that will be used
+# to verify clients if certificate authentication
+# is set.
+#ca-cert = /path/to/ca.pem
+
+# The object identifier that will be used to read the user ID in the client certificate.
+# The object identifier should be part of the certificate's DN
+# Useful OIDs are: 
+#  CN = 2.5.4.3, UID = 0.9.2342.19200300.100.1.1
+#cert-user-oid = 0.9.2342.19200300.100.1.1
+
+# The object identifier that will be used to read the user group in the client 
+# certificate. The object identifier should be part of the certificate's DN
+# Useful OIDs are: 
+#  OU (organizational unit) = 2.5.4.11 
+#cert-group-oid = 2.5.4.11
+
+# A revocation list of ca-cert is set
+#crl = /path/to/crl.pem
+
+# GnuTLS priority string
+tls-priorities = "PERFORMANCE:%SERVER_PRECEDENCE:%COMPAT"
+
+# To enforce perfect forward secrecy (PFS) on the main channel.
+#tls-priorities = "NORMAL:%SERVER_PRECEDENCE:%COMPAT:-RSA"
+
+# The time (in seconds) that a client is allowed to stay connected prior
+# to authentication
+auth-timeout = 40
+
+# The time (in seconds) that a client is not allowed to reconnect after 
+# a failed authentication attempt.
+min-reauth-time = 20
+
+max-ban-score = 50
+
+# The time (in seconds) that all score kept for a client is reset.
+ban-reset-time = 10
+
+# In case you'd like to change the default points.
+ban-points-wrong-password = 10
+ban-points-connection = 1
+ban-points-kkdcp = 1
+
+
+# Cookie timeout (in seconds)
+# Once a client is authenticated he's provided a cookie with
+# which he can reconnect. That cookie will be invalided if not
+# used within this timeout value. On a user disconnection, that
+# cookie will also be active for this time amount prior to be
+# invalid. That should allow a reasonable amount of time for roaming
+# between different networks.
+cookie-timeout = 30
+
+# Script to call when a client connects and obtains an IP
+# Parameters are passed on the environment.
+# REASON, USERNAME, GROUPNAME, HOSTNAME (the hostname selected by client), 
+# DEVICE, IP_REAL (the real IP of the client), IP_LOCAL (the local IP
+# in the P-t-P connection), IP_REMOTE (the VPN IP of the client). REASON
+# may be "connect" or "disconnect".
+#connect-script = /usr/bin/myscript
+#disconnect-script = /usr/bin/myscript
+
+# UTMP
+use-utmp = true
+
+# PID file
+pid-file = /var/run/ocserv.pid
+
+# The default server directory. Does not require any devices present.
+#chroot-dir = /path/to/chroot
+
+# socket file used for IPC, will be appended with .PID
+# It must be accessible within the chroot environment (if any)
+socket-file = /var/run/ocserv-socket
+
+# The user the worker processes will be run as. It should be
+# unique (no other services run as this user).
+run-as-user = @USERNAME@
+run-as-group = @GROUP@
+
+# Network settings
+
+device = vpns
+
+# The default domain to be advertised
+default-domain = example.com
+
+ipv4-network = @VPNNET@
+ipv4-dns = 192.168.1.1
+
+# Prior to leasing any IP from the pool ping it to verify that
+# it is not in use by another (unrelated to this server) host.
+ping-leases = false
+
+# Leave empty to assign the default MTU of the device
+# mtu = 
+
+route = 192.168.1.0/255.255.255.0
+#route = 192.168.5.0/255.255.255.0
+
+#
+# The following options are for (experimental) AnyConnect client 
+# compatibility. They are only available if the server is built 
+# with --enable-anyconnect
+#
+
+# Client profile xml. A sample file exists in doc/profile.xml.
+# This file must be accessible from inside the worker's chroot. 
+# The profile is ignored by the openconnect client.
+#user-profile = profile.xml
+
+# Unless set to false it is required for clients to present their
+# certificate even if they are authenticating via a previously granted
+# cookie. Legacy CISCO clients do not do that, and thus this option
+# should be set for them.
+#always-require-cert = false
+
+occtl-socket-file = @OCCTL_SOCKET@
+use-occtl = true

tests/ns.sh

@@ -75,19 +75,19 @@ ${IP} link add ${ETHNAME1} type veth peer name ${ETHNAME2}
 ${IP} link set ${ETHNAME1} netns ${NSNAME1}
 ${IP} link set ${ETHNAME2} netns ${NSNAME2}
 
-${IP} netns exec ${NSNAME1} ip link set ${ETHNAME1} up
-${IP} netns exec ${NSNAME2} ip link set ${ETHNAME2} up
-${IP} netns exec ${NSNAME2} ip link set lo up
+${IP} -n ${NSNAME1} link set ${ETHNAME1} up
+${IP} -n ${NSNAME2} link set ${ETHNAME2} up
+${IP} -n ${NSNAME2} link set lo up
 
-${IP} netns exec ${NSNAME1} ip addr add ${CLI_ADDRESS} dev ${ETHNAME1}
-${IP} netns exec ${NSNAME2} ip addr add ${ADDRESS} dev ${ETHNAME2}
+${IP} -n ${NSNAME1} addr add ${CLI_ADDRESS} dev ${ETHNAME1}
+${IP} -n ${NSNAME2} addr add ${ADDRESS} dev ${ETHNAME2}
 
-${IP} netns exec ${NSNAME1} ip route add default via ${CLI_ADDRESS} dev ${ETHNAME1}
-${IP} netns exec ${NSNAME2} ip route add default via ${ADDRESS} dev ${ETHNAME2}
+${IP} -n ${NSNAME1} route add default via ${CLI_ADDRESS} dev ${ETHNAME1}
+${IP} -n ${NSNAME2} route add default via ${ADDRESS} dev ${ETHNAME2}
 
-${IP} netns exec ${NSNAME2} ip addr
-${IP} netns exec ${NSNAME2} ip route
-${IP} netns exec ${NSNAME1} ip route
+${IP} -n ${NSNAME2} addr
+${IP} -n ${NSNAME2} route
+${IP} -n ${NSNAME1} route
 
 ${IP} netns exec ${NSNAME1} ping -c 1 ${ADDRESS} >/dev/null
 ${IP} netns exec ${NSNAME2} ping -c 1 ${ADDRESS} >/dev/null

tests/test-namespace-listen

@@ -0,0 +1,67 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 William Dauchy
+#
+# 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
+# (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/>.
+
+SERV="${SERV:-../src/ocserv}"
+PIDFILE=ocserv-pid.$$.tmp
+srcdir=${srcdir:-.}
+PORT=4498
+LISTEN_NS="ocserv-listen-ns-tmp-$$"
+OUTFILE=lsof.$$.tmp
+SS=$(which ss)
+
+ADDRESS=10.213.2.1
+CLI_ADDRESS=10.213.1.1
+VPNNET=172.17.215.0/24
+VPNADDR=172.17.215.1
+
+function finish {
+  set +e
+  echo " * Cleaning up..."
+  test -n "${PID}" && kill ${PID} >/dev/null 2>&1
+  test -n "${PIDFILE}" && rm -f ${PIDFILE} >/dev/null 2>&1
+  test -n "${CONFIG}" && rm -f ${CONFIG} >/dev/null 2>&1
+  test -n "${LISTEN_NS}" && ${IP} netns delete ${LISTEN_NS} >/dev/null 2>&1
+  test -n "${OUTFILE}" && rm -f ${OUTFILE} >/dev/null 2>&1
+}
+trap finish EXIT
+
+. `dirname $0`/common.sh
+. `dirname $0`/ns.sh
+
+update_config test-namespace-listen.config
+if test "$VERBOSE" = 1;then
+DEBUG="-d 3"
+fi
+
+echo "Seting up listen namespace"
+${IP} netns add ${LISTEN_NS}
+
+${CMDNS2} ${SERV} -p ${PIDFILE} -f -c ${CONFIG} ${DEBUG} & PID=$!
+
+sleep 5
+
+${IP} netns exec ${LISTEN_NS} ${SS} -tulwn>${OUTFILE}
+grep "LISTEN" ${OUTFILE}
+if test $? != 0; then
+	echo "ocserv is not listening in the correct namespace!"
+	exit 1
+fi
+
+kill $PID
+wait
+
+exit 0