network: Adds support host side veth device static routes

Adds the following new config keys:

	lxc.net.[i].veth.ipv4.route
	lxc.net.[i].veth.ipv6.route
E.g.

	lxc.net.0.veth.ipv4.route = 192.0.2.1/32
	lxc.net.0.veth.ipv4.route = 192.0.3.0/24
	lxc.net.0.veth.ipv6.route = 2001:db8::1/128
	lxc.net.0.veth.ipv6.route = 2001:db8:2::/64

Signed-off-by: tomponline <thomas.parrott@canonical.com>

doc/api-extensions.md

@@ -32,3 +32,9 @@ until a reboot succeeded. It takes a timeout argument. When set to `> 0`
 This adds support for injecting and removing mounts into/from a running
 containers. Two new API functions `mount()` and `umount()` are added. They
 mirror the current mount and umount API of the kernel.
+
+## network\_veth\_routes
+
+This introduces the `lxc.net.[i].veth.ipv4.route` and `lxc.net.[i].veth.ipv6.route` properties
+on `veth` type network interfaces. This allows adding static routes on host to the container's
+network interface.

doc/lxc.container.conf.sgml.in

@@ -375,7 +375,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
           <listitem>
             <para>
               The only allowed values are 0 and 1. Set this to 1 to destroy a
-              container on shutdown. 
+              container on shutdown.
             </para>
           </listitem>
         </varlistentry>
@@ -459,6 +459,12 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
               the <option>lxc.net.[i].veth.pair</option> option (except for
               unprivileged containers where this option is ignored for security
               reasons).
+
+              Static routes can be added on the host pointing to the container using the
+              <option>lxc.net.[i].veth.ipv4.route</option> and
+              <option>lxc.net.[i].veth.ipv6.route</option> options.
+              Several lines specify several routes.
+              The route is in format x.y.z.t/m, eg. 192.168.1.0/24.
             </para>
 
             <para>
@@ -855,7 +861,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
             When manually specifying a size for the log file the value should
             be a power of 2 when converted to bytes. Valid size prefixes are
             'KB', 'MB', 'GB'. (Note that all conversions are based on multiples
-            of 1024. That means 'KB' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'. 
+            of 1024. That means 'KB' == 'KiB', 'MB' == 'MiB', 'GB' == 'GiB'.
             Additionally, the case of the suffix is ignored, i.e. 'kB', 'KB' and
             'Kb' are treated equally.)
 
@@ -1629,7 +1635,7 @@ dev/null proc/kcore none bind,relative 0 0
             </para>
 
             <para>
-            To inherit the namespace from another container set the 
+            To inherit the namespace from another container set the
             <option>lxc.namespace.share.[namespace identifier]</option> to the name of
             the container, e.g. <option>lxc.namespace.share.pid=c3</option>.
             </para>
@@ -1708,7 +1714,7 @@ dev/null proc/kcore none bind,relative 0 0
           </term>
           <listitem>
             <para>
-              Specify the kernel parameters to be set. The parameters available 
+              Specify the kernel parameters to be set. The parameters available
               are those listed under /proc/sys/.
               Note that not all sysctls are namespaced. Changing Non-namespaced
               sysctls will cause the system-wide setting to be modified.
@@ -1716,7 +1722,7 @@ dev/null proc/kcore none bind,relative 0 0
                 <refentrytitle><command>sysctl</command></refentrytitle>
                 <manvolnum>8</manvolnum>
               </citerefentry>.
-              If used with no value, lxc will clear the parameters specified up 
+              If used with no value, lxc will clear the parameters specified up
               to this point.
             </para>
           </listitem>

src/lxc/api_extensions.h

@@ -44,6 +44,7 @@ static char *api_extensions[] = {
 	"mount_injection_file",
 	"seccomp_allow_nesting",
 	"seccomp_notify",
+	"network_veth_routes",
 };
 
 static size_t nr_api_extensions = sizeof(api_extensions) / sizeof(*api_extensions);

src/lxc/confile.c

@@ -137,6 +137,8 @@ lxc_config_define(net_script_down);
 lxc_config_define(net_script_up);
 lxc_config_define(net_type);
 lxc_config_define(net_veth_pair);
+lxc_config_define(net_veth_ipv4_route);
+lxc_config_define(net_veth_ipv6_route);
 lxc_config_define(net_vlan_id);
 lxc_config_define(no_new_privs);
 lxc_config_define(personality);
@@ -226,6 +228,8 @@ static struct lxc_config_t config_jump_table[] = {
 	{ "lxc.net.type",                  set_config_net_type,                    get_config_net_type,                    clr_config_net_type,                  },
 	{ "lxc.net.vlan.id",               set_config_net_vlan_id,                 get_config_net_vlan_id,                 clr_config_net_vlan_id,               },
 	{ "lxc.net.veth.pair",             set_config_net_veth_pair,               get_config_net_veth_pair,               clr_config_net_veth_pair,             },
+	{ "lxc.net.veth.ipv4.route",       set_config_net_veth_ipv4_route,         get_config_net_veth_ipv4_route,         clr_config_net_veth_ipv4_route,       },
+	{ "lxc.net.veth.ipv6.route",       set_config_net_veth_ipv6_route,         get_config_net_veth_ipv6_route,         clr_config_net_veth_ipv6_route,       },
 	{ "lxc.net.",                      set_config_net_nic,                     get_config_net_nic,                     clr_config_net_nic,                   },
 	{ "lxc.net",                       set_config_net,                         get_config_net,                         clr_config_net,                       },
 	{ "lxc.no_new_privs",	           set_config_no_new_privs,                get_config_no_new_privs,                clr_config_no_new_privs,              },
@@ -289,6 +293,8 @@ static int set_config_net_type(const char *key, const char *value,
 
 	if (!strcmp(value, "veth")) {
 		netdev->type = LXC_NET_VETH;
+		lxc_list_init(&netdev->priv.veth_attr.ipv4_routes);
+		lxc_list_init(&netdev->priv.veth_attr.ipv6_routes);
 	} else if (!strcmp(value, "macvlan")) {
 		netdev->type = LXC_NET_MACVLAN;
 		lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode,
@@ -629,6 +635,69 @@ static int set_config_net_ipv4_gateway(const char *key, const char *value,
 	return 0;
 }
 
+static int set_config_net_veth_ipv4_route(const char *key, const char *value,
+				       struct lxc_conf *lxc_conf, void *data)
+{
+	__do_free char *valdup = NULL;
+	__do_free struct lxc_inetdev *inetdev = NULL;
+	__do_free struct lxc_list *list = NULL;
+	int ret;
+	char *netmask, *slash;
+	struct lxc_netdev *netdev = data;
+
+	if (lxc_config_value_empty(value))
+		return clr_config_net_veth_ipv4_route(key, lxc_conf, data);
+
+	if (!netdev)
+		return minus_one_set_errno(EINVAL);
+
+	if (netdev->type != LXC_NET_VETH) {
+		SYSERROR("Invalid ipv4 route \"%s\", can only be used with veth network", value);
+		return minus_one_set_errno(EINVAL);
+	}
+
+	inetdev = malloc(sizeof(*inetdev));
+	if (!inetdev)
+		return -1;
+	memset(inetdev, 0, sizeof(*inetdev));
+
+	list = malloc(sizeof(*list));
+	if (!list)
+		return -1;
+
+	lxc_list_init(list);
+	list->elem = inetdev;
+
+	valdup = strdup(value);
+	if (!valdup)
+		return -1;
+
+	slash = strchr(valdup, '/');
+	if (!slash)
+		return minus_one_set_errno(EINVAL);
+
+	*slash = '\0';
+	slash++;
+	if (*slash == '\0')
+		return minus_one_set_errno(EINVAL);
+
+	netmask = slash;
+
+	ret = lxc_safe_uint(netmask, &inetdev->prefix);
+	if (ret < 0 || inetdev->prefix > 32)
+		return minus_one_set_errno(EINVAL);
+
+	ret = inet_pton(AF_INET, valdup, &inetdev->addr);
+	if (!ret || ret < 0)
+		return minus_one_set_errno(EINVAL);
+
+	lxc_list_add_tail(&netdev->priv.veth_attr.ipv4_routes, list);
+	move_ptr(inetdev);
+	move_ptr(list);
+
+	return 0;
+}
+
 static int set_config_net_ipv6_address(const char *key, const char *value,
 				       struct lxc_conf *lxc_conf, void *data)
 {
@@ -733,6 +802,69 @@ static int set_config_net_ipv6_gateway(const char *key, const char *value,
 	return 0;
 }
 
+static int set_config_net_veth_ipv6_route(const char *key, const char *value,
+				       struct lxc_conf *lxc_conf, void *data)
+{
+	__do_free char *valdup;
+	__do_free struct lxc_inet6dev *inet6dev;
+	__do_free struct lxc_list *list;
+	int ret;
+	char *netmask, *slash;
+	struct lxc_netdev *netdev = data;
+
+	if (lxc_config_value_empty(value))
+		return clr_config_net_veth_ipv6_route(key, lxc_conf, data);
+
+	if (!netdev)
+		return minus_one_set_errno(EINVAL);
+
+	if (netdev->type != LXC_NET_VETH) {
+		SYSERROR("Invalid ipv6 route \"%s\", can only be used with veth network", value);
+		return minus_one_set_errno(EINVAL);
+	}
+
+	inet6dev = malloc(sizeof(*inet6dev));
+	if (!inet6dev)
+		return -1;
+	memset(inet6dev, 0, sizeof(*inet6dev));
+
+	list = malloc(sizeof(*list));
+	if (!list)
+		return -1;
+
+	lxc_list_init(list);
+	list->elem = inet6dev;
+
+	valdup = strdup(value);
+	if (!valdup)
+		return -1;
+
+	slash = strchr(valdup, '/');
+	if (!slash)
+		return minus_one_set_errno(EINVAL);
+
+	*slash = '\0';
+	slash++;
+	if (*slash == '\0')
+		return minus_one_set_errno(EINVAL);
+
+	netmask = slash;
+
+	ret = lxc_safe_uint(netmask, &inet6dev->prefix);
+	if (ret < 0 || inet6dev->prefix > 128)
+		return minus_one_set_errno(EINVAL);
+
+	ret = inet_pton(AF_INET6, valdup, &inet6dev->addr);
+	if (!ret || ret < 0)
+		return minus_one_set_errno(EINVAL);
+
+	lxc_list_add_tail(&netdev->priv.veth_attr.ipv6_routes, list);
+	move_ptr(inet6dev);
+	move_ptr(list);
+
+	return 0;
+}
+
 static int set_config_net_script_up(const char *key, const char *value,
 				    struct lxc_conf *lxc_conf, void *data)
 {
@@ -4898,6 +5030,24 @@ static int clr_config_net_ipv4_address(const char *key,
 	return 0;
 }
 
+static int clr_config_net_veth_ipv4_route(const char *key,
+				       struct lxc_conf *lxc_conf, void *data)
+{
+	struct lxc_netdev *netdev = data;
+	struct lxc_list *cur, *next;
+
+	if (!netdev)
+		return -1;
+
+	lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv4_routes, next) {
+		lxc_list_del(cur);
+		free(cur->elem);
+		free(cur);
+	}
+
+	return 0;
+}
+
 static int clr_config_net_ipv6_gateway(const char *key,
 				       struct lxc_conf *lxc_conf, void *data)
 {
@@ -4930,6 +5080,24 @@ static int clr_config_net_ipv6_address(const char *key,
 	return 0;
 }
 
+static int clr_config_net_veth_ipv6_route(const char *key,
+				       struct lxc_conf *lxc_conf, void *data)
+{
+	struct lxc_netdev *netdev = data;
+	struct lxc_list *cur, *next;
+
+	if (!netdev)
+		return -1;
+
+	lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv6_routes, next) {
+		lxc_list_del(cur);
+		free(cur->elem);
+		free(cur);
+	}
+
+	return 0;
+}
+
 static int get_config_net_nic(const char *key, char *retv, int inlen,
 			      struct lxc_conf *c, void *data)
 {
@@ -5274,6 +5442,39 @@ static int get_config_net_ipv4_address(const char *key, char *retv, int inlen,
 	return fulllen;
 }
 
+static int get_config_net_veth_ipv4_route(const char *key, char *retv, int inlen,
+				       struct lxc_conf *c, void *data)
+{
+	int len;
+	size_t listlen;
+	char buf[INET_ADDRSTRLEN];
+	struct lxc_list *it;
+	int fulllen = 0;
+	struct lxc_netdev *netdev = data;
+
+	if (!retv)
+		inlen = 0;
+	else
+		memset(retv, 0, inlen);
+
+	if (!netdev)
+		return minus_one_set_errno(EINVAL);
+
+	if (netdev->type != LXC_NET_VETH)
+		return 0;
+
+	listlen = lxc_list_len(&netdev->priv.veth_attr.ipv4_routes);
+
+	lxc_list_for_each(it, &netdev->priv.veth_attr.ipv4_routes) {
+		struct lxc_inetdev *i = it->elem;
+		inet_ntop(AF_INET, &i->addr, buf, sizeof(buf));
+		strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
+			 (listlen-- > 1) ? "\n" : "");
+	}
+
+	return fulllen;
+}
+
 static int get_config_net_ipv6_gateway(const char *key, char *retv, int inlen,
 				       struct lxc_conf *c, void *data)
 {
@@ -5330,6 +5531,39 @@ static int get_config_net_ipv6_address(const char *key, char *retv, int inlen,
 	return fulllen;
 }
 
+static int get_config_net_veth_ipv6_route(const char *key, char *retv, int inlen,
+				       struct lxc_conf *c, void *data)
+{
+	int len;
+	size_t listlen;
+	char buf[INET6_ADDRSTRLEN];
+	struct lxc_list *it;
+	int fulllen = 0;
+	struct lxc_netdev *netdev = data;
+
+	if (!retv)
+		inlen = 0;
+	else
+		memset(retv, 0, inlen);
+
+	if (!netdev)
+		return minus_one_set_errno(EINVAL);
+
+	if (netdev->type != LXC_NET_VETH)
+		return 0;
+
+	listlen = lxc_list_len(&netdev->priv.veth_attr.ipv6_routes);
+
+	lxc_list_for_each(it, &netdev->priv.veth_attr.ipv6_routes) {
+		struct lxc_inet6dev *i = it->elem;
+		inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf));
+		strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
+			 (listlen-- > 1) ? "\n" : "");
+	}
+
+	return fulllen;
+}
+
 int lxc_list_config_items(char *retv, int inlen)
 {
 	size_t i;
@@ -5463,6 +5697,8 @@ int lxc_list_net(struct lxc_conf *c, const char *key, char *retv, int inlen)
 	switch (netdev->type) {
 	case LXC_NET_VETH:
 		strprint(retv, inlen, "veth.pair\n");
+		strprint(retv, inlen, "veth.ipv4.route\n");
+		strprint(retv, inlen, "veth.ipv6.route\n");
 		break;
 	case LXC_NET_MACVLAN:
 		strprint(retv, inlen, "macvlan.mode\n");

src/lxc/confile_utils.c

@@ -317,7 +317,7 @@ void lxc_log_configured_netdevs(const struct lxc_conf *conf)
 			TRACE("type: none");
 			break;
 		default:
-			ERROR("invalid network type %d", netdev->type);
+			ERROR("Invalid network type %d", netdev->type);
 			return;
 		}
 
@@ -374,6 +374,28 @@ void lxc_log_configured_netdevs(const struct lxc_conf *conf)
 					  sizeof(bufinet6));
 				TRACE("ipv6 addr: %s", bufinet6);
 			}
+
+			if (netdev->type == LXC_NET_VETH) {
+				lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv4_routes, next) {
+					inet4dev = cur->elem;
+					if (!inet_ntop(AF_INET, &inet4dev->addr, bufinet4, sizeof(bufinet4))) {
+						ERROR("Invalid ipv4 veth route");
+						return;
+					}
+
+					TRACE("ipv4 veth route: %s/%u", bufinet4, inet4dev->prefix);
+				}
+
+				lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv6_routes, next) {
+					inet6dev = cur->elem;
+					if (!inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, sizeof(bufinet6))) {
+						ERROR("Invalid ipv6 veth route");
+						return;
+					}
+
+					TRACE("ipv6 veth route: %s/%u", bufinet6, inet6dev->prefix);
+				}
+			}
 		}
 	}
 }
@@ -401,6 +423,20 @@ static void lxc_free_netdev(struct lxc_netdev *netdev)
 		free(cur);
 	}
 
+	if (netdev->type == LXC_NET_VETH) {
+		lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv4_routes, next) {
+			lxc_list_del(cur);
+			free(cur->elem);
+			free(cur);
+		}
+
+		lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv6_routes, next) {
+			lxc_list_del(cur);
+			free(cur->elem);
+			free(cur);
+		}
+	}
+
 	free(netdev);
 }
 

src/lxc/network.c

@@ -69,6 +69,44 @@ lxc_log_define(network, lxc);
 
 typedef int (*instantiate_cb)(struct lxc_handler *, struct lxc_netdev *);
 
+static int lxc_setup_ipv4_routes(struct lxc_list *ip, int ifindex)
+{
+	struct lxc_list *iterator;
+	int err;
+
+	lxc_list_for_each(iterator, ip) {
+		struct lxc_inetdev *inetdev = iterator->elem;
+
+		err = lxc_ipv4_dest_add(ifindex, &inetdev->addr, inetdev->prefix);
+		if (err) {
+			SYSERROR("Failed to setup ipv4 route for network device "
+			         "with ifindex %d", ifindex);
+			return minus_one_set_errno(-err);
+		}
+	}
+
+	return 0;
+}
+
+static int lxc_setup_ipv6_routes(struct lxc_list *ip, int ifindex)
+{
+	struct lxc_list *iterator;
+	int err;
+
+	lxc_list_for_each(iterator, ip) {
+		struct lxc_inet6dev *inet6dev = iterator->elem;
+
+		err = lxc_ipv6_dest_add(ifindex, &inet6dev->addr, inet6dev->prefix);
+		if (err) {
+			SYSERROR("Failed to setup ipv6 route for network device "
+			         "with ifindex %d", ifindex);
+			return minus_one_set_errno(-err);
+		}
+	}
+
+	return 0;
+}
+
 static int instantiate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev)
 {
 	int bridge_index, err;
@@ -183,6 +221,18 @@ static int instantiate_veth(struct lxc_handler *handler, struct lxc_netdev *netd
 		goto out_delete;
 	}
 
+	/* setup ipv4 routes on the host interface */
+	if (lxc_setup_ipv4_routes(&netdev->priv.veth_attr.ipv4_routes, netdev->priv.veth_attr.ifindex)) {
+		ERROR("Failed to setup ipv4 routes for network device \"%s\"", veth1);
+		goto out_delete;
+	}
+
+	/* setup ipv6 routes on the host interface */
+	if (lxc_setup_ipv6_routes(&netdev->priv.veth_attr.ipv6_routes, netdev->priv.veth_attr.ifindex)) {
+		ERROR("Failed to setup ipv6 routes for network device \"%s\"", veth1);
+		goto out_delete;
+	}
+
 	if (netdev->upscript) {
 		char *argv[] = {
 		    "veth",
@@ -1780,7 +1830,7 @@ int lxc_ipv6_gateway_add(int ifindex, struct in6_addr *gw)
 	return ip_gateway_add(AF_INET6, ifindex, gw);
 }
 
-static int ip_route_dest_add(int family, int ifindex, void *dest)
+static int ip_route_dest_add(int family, int ifindex, void *dest, unsigned int netmask)
 {
 	int addrlen, err;
 	struct nl_handler nlh;
@@ -1815,7 +1865,7 @@ static int ip_route_dest_add(int family, int ifindex, void *dest)
 	rt->rtm_scope = RT_SCOPE_LINK;
 	rt->rtm_protocol = RTPROT_BOOT;
 	rt->rtm_type = RTN_UNICAST;
-	rt->rtm_dst_len = addrlen * 8;
+	rt->rtm_dst_len = netmask;
 
 	err = -EINVAL;
 	if (nla_put_buffer(nlmsg, RTA_DST, dest, addrlen))
@@ -1830,14 +1880,14 @@ out:
 	return err;
 }
 
-int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest)
+int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest, unsigned int netmask)
 {
-	return ip_route_dest_add(AF_INET, ifindex, dest);
+	return ip_route_dest_add(AF_INET, ifindex, dest, netmask);
 }
 
-int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest)
+int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest, unsigned int netmask)
 {
-	return ip_route_dest_add(AF_INET6, ifindex, dest);
+	return ip_route_dest_add(AF_INET6, ifindex, dest, netmask);
 }
 
 bool is_ovs_bridge(const char *bridge)
@@ -2807,7 +2857,7 @@ static int setup_ipv4_addr(struct lxc_list *ip, int ifindex)
 		if (err) {
 			errno = -err;
 			SYSERROR("Failed to setup ipv4 address for network device "
-			         "with eifindex %d", ifindex);
+			         "with ifindex %d", ifindex);
 			return -1;
 		}
 	}
@@ -2829,7 +2879,7 @@ static int setup_ipv6_addr(struct lxc_list *ip, int ifindex)
 		if (err) {
 			errno = -err;
 			SYSERROR("Failed to setup ipv6 address for network device "
-			         "with eifindex %d", ifindex);
+			         "with ifindex %d", ifindex);
 			return -1;
 		}
 	}
@@ -2988,7 +3038,7 @@ static int lxc_setup_netdev_in_child_namespaces(struct lxc_netdev *netdev)
 
 		err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway);
 		if (err) {
-			err = lxc_ipv4_dest_add(netdev->ifindex, netdev->ipv4_gateway);
+			err = lxc_ipv4_dest_add(netdev->ifindex, netdev->ipv4_gateway, 32);
 			if (err) {
 				errno = -err;
 				SYSERROR("Failed to add ipv4 dest for network device \"%s\"",
@@ -3027,7 +3077,7 @@ static int lxc_setup_netdev_in_child_namespaces(struct lxc_netdev *netdev)
 
 		err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway);
 		if (err) {
-			err = lxc_ipv6_dest_add(netdev->ifindex, netdev->ipv6_gateway);
+			err = lxc_ipv6_dest_add(netdev->ifindex, netdev->ipv6_gateway, 128);
 			if (err) {
 				errno = -err;
 				SYSERROR("Failed to add ipv6 dest for network device \"%s\"",

src/lxc/network.h

@@ -95,6 +95,8 @@ struct ifla_veth {
 	char pair[IFNAMSIZ];
 	char veth1[IFNAMSIZ];
 	int ifindex;
+	struct lxc_list ipv4_routes;
+	struct lxc_list ipv6_routes;
 };
 
 struct ifla_vlan {
@@ -221,8 +223,8 @@ extern int lxc_ipv4_addr_get(int ifindex, struct in_addr **res);
 extern int lxc_ipv6_addr_get(int ifindex, struct in6_addr **res);
 
 /* Set a destination route to an interface. */
-extern int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest);
+extern int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest, unsigned int netmask);
-extern int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest);
+extern int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest, unsigned int netmask);
 
 /* Set default route. */
 extern int lxc_ipv4_gateway_add(int ifindex, struct in_addr *gw);

src/tests/parse_config_file.c

@@ -134,6 +134,16 @@ static int set_and_clear_complete_netdev(struct lxc_container *c)
 		return -1;
 	}
 
+	if (!c->set_config_item(c, "lxc.net.1.veth.ipv4.route", "192.0.2.1/32")) {
+		lxc_error("%s\n", "lxc.net.1.veth.ipv4.route");
+		return -1;
+	}
+
+	if (!c->set_config_item(c, "lxc.net.1.veth.ipv6.route", "2001:db8::1/128")) {
+		lxc_error("%s\n", "lxc.net.1.veth.ipv6.route");
+		return -1;
+	}
+
 	if (!c->set_config_item(c, "lxc.net.1.hwaddr",
 				"52:54:00:80:7a:5d")) {
 		lxc_error("%s\n", "lxc.net.1.hwaddr");
@@ -695,6 +705,16 @@ int main(int argc, char *argv[])
 		goto non_test_error;
 	}
 
+	if (set_get_compare_clear_save_load_network(c, "lxc.net.0.veth.ipv4.route", "192.0.2.1/32", tmpf, true, "veth")) {
+		lxc_error("%s\n", "lxc.net.0.veth.ipv4.route");
+		return -1;
+	}
+
+	if (set_get_compare_clear_save_load_network(c, "lxc.net.0.veth.ipv6.route", "2001:db8::1/128", tmpf, true, "veth")) {
+		lxc_error("%s\n", "lxc.net.0.veth.ipv6.route");
+		return -1;
+	}
+
 	if (set_get_compare_clear_save_load(c, "lxc.net.0.script.up", "/some/up/path", tmpf, true)) {
 		lxc_error("%s\n", "lxc.net.0.script.up");
 		goto non_test_error;