platform: extend NMIPConfigSource to preserve the rtm_protocol field

For addresses (NMPlatformIPAddress) the @addr_source field is ignored
on a platform level. That is, all addresses inside the platform cache
have this value set to NM_IP_CONFIG_SOURCE_KERNEL. Maybe, for that reason,
the source should not be a part of the NMPlatformIPAddress structure, but
it is convenient for users to piggy back the source inside the platform
address structure.

For routes, the source is stored in NMPlatformIPRoute's @rt_source
field. When adding a route to kernel, we set the @rtm_protocol of the
route depending on the source. However, we want to map different source
values to the same protocol value.

On the other hand, when kernel sends us a route that gets put inside
the cache, we must preserve the protocol value and must not map
different protocol values to the same source.
The reason is, that a user can add two routes that only differ by
@rtm_protocol. In that sense, the @rtm_protocol fields is part of the
unique ID of a kernel route, and thus different values must map to
different sources.

Fix this, by extending the range of NMIPConfigSource to contain
a range of protocol fields.

9 files changed, 195 insertions, 90 deletions

diff --git a/src/nm-types.h b/src/nm-types.h
index db0b944e06..fa70372c43 100644
--- a/src/nm-types.h
+++ b/src/nm-types.h
@@ -54,10 +54,20 @@ typedef struct _NMLldpListener       NMLldpListener;
 
 typedef enum {
 	/* In priority order; higher number == higher priority */
-	NM_IP_CONFIG_SOURCE_UNKNOWN,
 
-	/* routes from platform with protocol RTPROT_KERNEL. */
-	NM_IP_CONFIG_SOURCE_RTPROT_KERNEL,
+	NM_IP_CONFIG_SOURCE_UNKNOWN                 = 0,
+
+	/* for routes, the source is mapped to the uint8 field rtm_protocol.
+	 * Reserve the range [1,0x100] for native RTPROT values. */
+
+	NM_IP_CONFIG_SOURCE_RTPROT_UNSPEC           = 1 + 0,
+	NM_IP_CONFIG_SOURCE_RTPROT_REDIRECT         = 1 + 1,
+	NM_IP_CONFIG_SOURCE_RTPROT_KERNEL           = 1 + 2,
+	NM_IP_CONFIG_SOURCE_RTPROT_BOOT             = 1 + 3,
+	NM_IP_CONFIG_SOURCE_RTPROT_STATIC           = 1 + 4,
+	NM_IP_CONFIG_SOURCE_RTPROT_RA               = 1 + 9,
+	NM_IP_CONFIG_SOURCE_RTPROT_DHCP             = 1 + 16,
+	_NM_IP_CONFIG_SOURCE_RTPROT_LAST            = 1 + 0xFF,
 
 	NM_IP_CONFIG_SOURCE_KERNEL,
 	NM_IP_CONFIG_SOURCE_SHARED,
@@ -70,6 +80,12 @@ typedef enum {
 	NM_IP_CONFIG_SOURCE_USER,
 } NMIPConfigSource;
 
+inline static gboolean
+NM_IS_IP_CONFIG_SOURCE_RTPROT (NMIPConfigSource source)
+{
+	return source > NM_IP_CONFIG_SOURCE_UNKNOWN && source <= _NM_IP_CONFIG_SOURCE_RTPROT_LAST;
+}
+
 /* platform */
 typedef struct _NMPlatform           NMPlatform;
 typedef struct _NMPlatformIP4Address NMPlatformIP4Address;
diff --git a/src/platform/nm-fake-platform.c b/src/platform/nm-fake-platform.c
index cbe8ed4996..39b5f3c080 100644
--- a/src/platform/nm-fake-platform.c
+++ b/src/platform/nm-fake-platform.c
@@ -31,6 +31,7 @@
 #include "nm-utils.h"
 
 #include "nm-core-utils.h"
+#include "nm-platform-utils.h"
 #include "nmp-object.h"
 
 #include "nm-test-utils.h"
@@ -1195,7 +1196,7 @@ ip4_route_add (NMPlatform *platform, int ifindex, NMIPConfigSource source,
 
 	memset (&route, 0, sizeof (route));
 	route.ifindex = ifindex;
-	route.rt_source = source;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (source);
 	route.network = nm_utils_ip4_address_clear_host_address (network, plen);
 	route.plen = plen;
 	route.gateway = gateway;
@@ -1260,7 +1261,7 @@ ip6_route_add (NMPlatform *platform, int ifindex, NMIPConfigSource source,
 
 	memset (&route, 0, sizeof (route));
 	route.ifindex = ifindex;
-	route.rt_source = source;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (source);
 	nm_utils_ip6_address_clear_host_address (&route.network, &network, plen);
 	route.plen = plen;
 	route.gateway = gateway;
diff --git a/src/platform/nm-linux-platform.c b/src/platform/nm-linux-platform.c
index 4554de66a2..11c2e965b2 100644
--- a/src/platform/nm-linux-platform.c
+++ b/src/platform/nm-linux-platform.c
@@ -2246,7 +2246,7 @@ _nl_msg_new_route (int nlmsg_type,
 		.rtm_family = family,
 		.rtm_tos = 0,
 		.rtm_table = RT_TABLE_MAIN, /* omit setting RTA_TABLE attribute */
-		.rtm_protocol = nmp_utils_ip_config_source_to_rtprot (source),
+		.rtm_protocol = nmp_utils_ip_config_source_coerce_to_rtprot (source),
 		.rtm_scope = scope,
 		.rtm_type = RTN_UNICAST,
 		.rtm_flags = 0,
diff --git a/src/platform/nm-platform-utils.c b/src/platform/nm-platform-utils.c
index 36fe699389..7fb4b95553 100644
--- a/src/platform/nm-platform-utils.c
+++ b/src/platform/nm-platform-utils.c
@@ -433,14 +433,38 @@ nmp_utils_device_exists (const char *name)
 	return g_file_test (sysdir, G_FILE_TEST_EXISTS);
 }
 
-guint
-nmp_utils_ip_config_source_to_rtprot (NMIPConfigSource source)
+NMIPConfigSource
+nmp_utils_ip_config_source_from_rtprot (guint8 rtprot)
 {
-	switch (source) {
-	case NM_IP_CONFIG_SOURCE_UNKNOWN:
+	return ((int) rtprot) + 1;
+}
+
+NMIPConfigSource
+nmp_utils_ip_config_source_round_trip_rtprot (NMIPConfigSource source)
+{
+	/* when adding a route to kernel for a give @source, the resulting route
+	 * will be put into the cache with a source of NM_IP_CONFIG_SOURCE_RTPROT_*.
+	 * This function returns that. */
+	return nmp_utils_ip_config_source_from_rtprot (nmp_utils_ip_config_source_coerce_to_rtprot (source));
+}
+
+guint8
+nmp_utils_ip_config_source_coerce_to_rtprot (NMIPConfigSource source)
+{
+	/* when adding a route to kernel, we coerce the @source field
+	 * to rtm_protocol. This is not lossless as we map different
+	 * source values to the same RTPROT uint8 value. */
+	if (source <= NM_IP_CONFIG_SOURCE_UNKNOWN)
 		return RTPROT_UNSPEC;
+
+	if (source <= _NM_IP_CONFIG_SOURCE_RTPROT_LAST) {
+		nm_assert (NM_IS_IP_CONFIG_SOURCE_RTPROT (source));
+		return source - 1;
+	} else
+		nm_assert (!NM_IS_IP_CONFIG_SOURCE_RTPROT (source));
+
+	switch (source) {
 	case NM_IP_CONFIG_SOURCE_KERNEL:
-	case NM_IP_CONFIG_SOURCE_RTPROT_KERNEL:
 		return RTPROT_KERNEL;
 	case NM_IP_CONFIG_SOURCE_DHCP:
 		return RTPROT_DHCP;
@@ -453,18 +477,32 @@ nmp_utils_ip_config_source_to_rtprot (NMIPConfigSource source)
 }
 
 NMIPConfigSource
-nmp_utils_ip_config_source_from_rtprot (guint rtprot)
+nmp_utils_ip_config_source_coerce_from_rtprot (NMIPConfigSource source)
 {
-	switch (rtprot) {
-	case RTPROT_UNSPEC:
+	/* When we receive a route from kernel and put it into the platform cache,
+	 * we preserve the protocol field by converting it to a NMIPConfigSource
+	 * via nmp_utils_ip_config_source_from_rtprot().
+	 *
+	 * However, that is not the inverse of nmp_utils_ip_config_source_coerce_to_rtprot().
+	 * Instead, to go back to the original value, you need another step:
+	 *   nmp_utils_ip_config_source_coerce_from_rtprot (nmp_utils_ip_config_source_from_rtprot (rtprot)).
+	 *
+	 * This might partly restore the original source value, but of course that
+	 * is not really possible because nmp_utils_ip_config_source_coerce_to_rtprot()
+	 * is not injective.
+	 * */
+	switch (source) {
+	case NM_IP_CONFIG_SOURCE_RTPROT_UNSPEC:
 		return NM_IP_CONFIG_SOURCE_UNKNOWN;
-	case RTPROT_KERNEL:
-		return NM_IP_CONFIG_SOURCE_RTPROT_KERNEL;
-	case RTPROT_REDIRECT:
+
+	case NM_IP_CONFIG_SOURCE_RTPROT_KERNEL:
+	case NM_IP_CONFIG_SOURCE_RTPROT_REDIRECT:
 		return NM_IP_CONFIG_SOURCE_KERNEL;
-	case RTPROT_RA:
+
+	case NM_IP_CONFIG_SOURCE_RTPROT_RA:
 		return NM_IP_CONFIG_SOURCE_RDISC;
-	case RTPROT_DHCP:
+
+	case NM_IP_CONFIG_SOURCE_RTPROT_DHCP:
 		return NM_IP_CONFIG_SOURCE_DHCP;
 
 	default:
@@ -472,17 +510,50 @@ nmp_utils_ip_config_source_from_rtprot (guint rtprot)
 	}
 }
 
-NM_UTILS_ENUM2STR_DEFINE (nmp_utils_ip_config_source_to_string, NMIPConfigSource,
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_UNKNOWN,       "unknown"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_RTPROT_KERNEL, "rtprot-kernel"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_KERNEL,        "kernel"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_SHARED,        "shared"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_IP4LL,         "ipv4ll"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_PPP,           "ppp"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_WWAN,          "wwan"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_VPN,           "vpn"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_DHCP,          "dhcp"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_RDISC,         "rdisc"),
-	NM_UTILS_ENUM2STR (NM_IP_CONFIG_SOURCE_USER,          "user"),
-);
+const char *
+nmp_utils_ip_config_source_to_string (NMIPConfigSource source, char *buf, gsize len)
+{
+	const char *s = NULL;
+	nm_utils_to_string_buffer_init (&buf, &len); \
+
+	if (!len)
+		return buf;
+
+	switch (source) {
+	case NM_IP_CONFIG_SOURCE_UNKNOWN:         s = "unknown"; break;
+
+	case NM_IP_CONFIG_SOURCE_RTPROT_UNSPEC:   s = "rt-unspec"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_REDIRECT: s = "rt-redirect"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_KERNEL:   s = "rt-kernel"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_BOOT:     s = "rt-boot"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_STATIC:   s = "rt-static"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_DHCP:     s = "rt-dhcp"; break;
+	case NM_IP_CONFIG_SOURCE_RTPROT_RA:       s = "rt-ra"; break;
+
+	case NM_IP_CONFIG_SOURCE_KERNEL:          s = "kernel"; break;
+	case NM_IP_CONFIG_SOURCE_SHARED:          s = "shared"; break;
+	case NM_IP_CONFIG_SOURCE_IP4LL:           s = "ipv4ll"; break;
+	case NM_IP_CONFIG_SOURCE_PPP:             s = "ppp"; break;
+	case NM_IP_CONFIG_SOURCE_WWAN:            s = "wwan"; break;
+	case NM_IP_CONFIG_SOURCE_VPN:             s = "vpn"; break;
+	case NM_IP_CONFIG_SOURCE_DHCP:            s = "dhcp"; break;
+	case NM_IP_CONFIG_SOURCE_RDISC:           s = "rdisc"; break;
+	case NM_IP_CONFIG_SOURCE_USER:            s = "user"; break;
+	default:
+		break;
+	}
+
+	if (source >= 1 && source <= 0x100) {
+		if (s)
+			g_snprintf (buf, len, "%s", s);
+		else
+			g_snprintf (buf, len, "rt-%d", ((int) source) - 1);
+	} else {
+		if (s)
+			g_strlcpy (buf, s, len);
+		else
+			g_snprintf (buf, len, "(%d)", source);
+	}
+	return buf;
+}
 
diff --git a/src/platform/nm-platform-utils.h b/src/platform/nm-platform-utils.h
index 5b1fc0e8dc..df7abcef89 100644
--- a/src/platform/nm-platform-utils.h
+++ b/src/platform/nm-platform-utils.h
@@ -54,8 +54,10 @@ const char *nmp_utils_udev_get_driver (GUdevDevice *device);
 
 gboolean nmp_utils_device_exists (const char *name);
 
-guint            nmp_utils_ip_config_source_to_rtprot   (NMIPConfigSource source);
-NMIPConfigSource nmp_utils_ip_config_source_from_rtprot (guint rtprot);
-const char *     nmp_utils_ip_config_source_to_string   (NMIPConfigSource source, char *buf, gsize len);
+NMIPConfigSource nmp_utils_ip_config_source_from_rtprot (guint8 rtprot);
+guint8           nmp_utils_ip_config_source_coerce_to_rtprot   (NMIPConfigSource source);
+NMIPConfigSource nmp_utils_ip_config_source_coerce_from_rtprot (NMIPConfigSource source);
+NMIPConfigSource nmp_utils_ip_config_source_round_trip_rtprot  (NMIPConfigSource source);
+const char *     nmp_utils_ip_config_source_to_string (NMIPConfigSource source, char *buf, gsize len);
 
 #endif /* __NM_PLATFORM_UTILS_H__ */
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 39cfc31ccc..2c1823c21d 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -303,7 +303,13 @@ typedef union {
 
 #define __NMPlatformIPRoute_COMMON \
 	__NMPlatformObject_COMMON; \
+	\
+	/* The NMIPConfigSource. For routes that we receive from cache this corresponds
+	 * to the rtm_protocol field (and is one of the NM_IP_CONFIG_SOURCE_RTPROT_* values).
+	 * When adding a route, the source will be coerced to the protocol using
+	 * nmp_utils_ip_config_source_coerce_to_rtprot(). */ \
 	NMIPConfigSource rt_source; \
+	\
 	guint8 plen; \
 	\
 	/* the route has rtm_flags set to RTM_F_CLONED. Such a route
diff --git a/src/platform/tests/test-route.c b/src/platform/tests/test-route.c
index c78b24c771..360404e944 100644
--- a/src/platform/tests/test-route.c
+++ b/src/platform/tests/test-route.c
@@ -23,9 +23,9 @@
 #include <linux/rtnetlink.h>
 
 #include "nm-core-utils.h"
-#include "test-common.h"
+#include "nm-platform-utils.h"
 
-#include "nm-test-utils.h"
+#include "test-common.h"
 
 #define DEVICE_NAME "nm-test-device"
 
@@ -178,7 +178,7 @@ test_ip4_route (void)
 	/* Test route listing */
 	routes = nm_platform_ip4_route_get_all (NM_PLATFORM_GET, ifindex, NM_PLATFORM_GET_ROUTE_FLAGS_WITH_DEFAULT | NM_PLATFORM_GET_ROUTE_FLAGS_WITH_NON_DEFAULT);
 	memset (rts, 0, sizeof (rts));
-	rts[0].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[0].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[0].network = gateway;
 	rts[0].plen = 32;
 	rts[0].ifindex = ifindex;
@@ -186,7 +186,7 @@ test_ip4_route (void)
 	rts[0].metric = metric;
 	rts[0].mss = mss;
 	rts[0].scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK);
-	rts[1].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[1].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[1].network = network;
 	rts[1].plen = plen;
 	rts[1].ifindex = ifindex;
@@ -194,7 +194,7 @@ test_ip4_route (void)
 	rts[1].metric = metric;
 	rts[1].mss = mss;
 	rts[1].scope_inv = nm_platform_route_scope_inv (RT_SCOPE_UNIVERSE);
-	rts[2].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[2].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[2].network = 0;
 	rts[2].plen = 0;
 	rts[2].ifindex = ifindex;
@@ -265,21 +265,21 @@ test_ip6_route (void)
 	/* Test route listing */
 	routes = nm_platform_ip6_route_get_all (NM_PLATFORM_GET, ifindex, NM_PLATFORM_GET_ROUTE_FLAGS_WITH_DEFAULT | NM_PLATFORM_GET_ROUTE_FLAGS_WITH_NON_DEFAULT);
 	memset (rts, 0, sizeof (rts));
-	rts[0].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[0].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[0].network = gateway;
 	rts[0].plen = 128;
 	rts[0].ifindex = ifindex;
 	rts[0].gateway = in6addr_any;
 	rts[0].metric = nm_utils_ip6_route_metric_normalize (metric);
 	rts[0].mss = mss;
-	rts[1].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[1].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[1].network = network;
 	rts[1].plen = plen;
 	rts[1].ifindex = ifindex;
 	rts[1].gateway = gateway;
 	rts[1].metric = nm_utils_ip6_route_metric_normalize (metric);
 	rts[1].mss = mss;
-	rts[2].rt_source = NM_IP_CONFIG_SOURCE_USER;
+	rts[2].rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	rts[2].network = in6addr_any;
 	rts[2].plen = 0;
 	rts[2].ifindex = ifindex;
diff --git a/src/tests/Makefile.am b/src/tests/Makefile.am
index b93d4da3b9..0912c4ccd0 100644
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@@ -52,6 +52,7 @@ test_ip6_config_LDADD = \
 
 test_route_manager_fake_CPPFLAGS = \
 	$(AM_CPPFLAGS) \
+	$(GUDEV_CFLAGS) \
 	-I$(top_srcdir)/src/platform/tests \
 	-DSETUP=nm_fake_platform_setup \
 	-DKERNEL_HACKS=0
@@ -69,6 +70,7 @@ test_route_manager_linux_SOURCES = \
 
 test_route_manager_linux_CPPFLAGS = \
 	$(AM_CPPFLAGS) \
+	$(GUDEV_CFLAGS) \
 	-I$(top_srcdir)/src/platform/tests \
 	-DSETUP=nm_linux_platform_setup \
 	-DKERNEL_HACKS=1
diff --git a/src/tests/test-route-manager.c b/src/tests/test-route-manager.c
index 4335f8f46d..b81c263c08 100644
--- a/src/tests/test-route-manager.c
+++ b/src/tests/test-route-manager.c
@@ -23,12 +23,11 @@
 #include <arpa/inet.h>
 #include <linux/rtnetlink.h>
 
-#include "test-common.h"
-
 #include "nm-platform.h"
+#include "nm-platform-utils.h"
 #include "nm-route-manager.h"
 
-#include "nm-test-utils.h"
+#include "test-common.h"
 
 typedef struct {
 	int ifindex0, ifindex1;
@@ -45,7 +44,7 @@ setup_dev0_ip4 (int ifindex, guint mss_of_first_route, guint32 metric_of_second_
 	route.ifindex = ifindex;
 	route.mss = 0;
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "6.6.6.0", &route.network);
 	route.plen = 24;
 	route.gateway = INADDR_ANY;
@@ -53,7 +52,7 @@ setup_dev0_ip4 (int ifindex, guint mss_of_first_route, guint32 metric_of_second_
 	route.mss = mss_of_first_route;
 	g_array_append_val (routes, route);
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "7.0.0.0", &route.network);
 	route.plen = 8;
 	inet_pton (AF_INET, "6.6.6.1", &route.gateway);
@@ -87,21 +86,21 @@ setup_dev1_ip4 (int ifindex)
 	                                route.mss))
 		g_assert_not_reached ();
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "6.6.6.0", &route.network);
 	route.plen = 24;
 	route.gateway = INADDR_ANY;
 	route.metric = 20;
 	g_array_append_val (routes, route);
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "7.0.0.0", &route.network);
 	route.plen = 8;
 	route.gateway = INADDR_ANY;
 	route.metric = 22;
 	g_array_append_val (routes, route);
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "8.0.0.0", &route.network);
 	route.plen = 8;
 	inet_pton (AF_INET, "6.6.6.2", &route.gateway);
@@ -121,14 +120,14 @@ update_dev0_ip4 (int ifindex)
 	route.ifindex = ifindex;
 	route.mss = 0;
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "6.6.6.0", &route.network);
 	route.plen = 24;
 	route.gateway = INADDR_ANY;
 	route.metric = 20;
 	g_array_append_val (routes, route);
 
-	route.rt_source = NM_IP_CONFIG_SOURCE_USER;
+	route.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER);
 	inet_pton (AF_INET, "7.0.0.0", &route.network);
 	route.plen = 8;
 	route.gateway = INADDR_ANY;
@@ -163,7 +162,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP4Route state1[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex0,
@@ -173,7 +172,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("7.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex0,
@@ -183,7 +182,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_UNIVERSE),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("7.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -193,7 +192,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex1,
@@ -203,7 +202,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("8.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -216,7 +215,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP4Route state2[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex0,
@@ -226,7 +225,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("7.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex0,
@@ -236,7 +235,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("7.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -246,7 +245,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex1,
@@ -256,7 +255,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("8.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -269,7 +268,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP4Route state3[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("7.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -279,7 +278,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex1,
@@ -289,7 +288,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_LINK),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("8.0.0.0"),
 			.plen = 8,
 			.ifindex = fixture->ifindex1,
@@ -299,7 +298,7 @@ test_ip4 (test_fixture *fixture, gconstpointer user_data)
 			.scope_inv = nm_platform_route_scope_inv (RT_SCOPE_UNIVERSE),
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = nmtst_inet4_from_string ("6.6.6.0"),
 			.plen = 24,
 			.ifindex = fixture->ifindex1,
@@ -542,7 +541,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP6Route state1[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex0,
@@ -551,7 +550,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex0,
@@ -560,7 +559,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:abad:c0de::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex0,
@@ -569,7 +568,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:abad:c0de::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -578,7 +577,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -587,7 +586,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -596,7 +595,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:d34d::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -608,7 +607,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP6Route state2[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex0,
@@ -617,7 +616,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex0,
@@ -626,7 +625,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:abad:c0de::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex0,
@@ -635,7 +634,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:abad:c0de::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -644,7 +643,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -653,7 +652,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -662,7 +661,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:d34d::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -674,7 +673,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 
 	NMPlatformIP6Route state3[] = {
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:abad:c0de::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -683,7 +682,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -692,7 +691,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -701,7 +700,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:1337::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -710,7 +709,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:8086::"),
 			.plen = 48,
 			.ifindex = fixture->ifindex1,
@@ -719,7 +718,7 @@ test_ip6 (test_fixture *fixture, gconstpointer user_data)
 			.mss = 0,
 		},
 		{
-			.rt_source = NM_IP_CONFIG_SOURCE_USER,
+			.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (NM_IP_CONFIG_SOURCE_USER),
 			.network = *nmtst_inet6_from_string ("2001:db8:d34d::"),
 			.plen = 64,
 			.ifindex = fixture->ifindex1,
@@ -787,6 +786,7 @@ static void
 _assert_route_check (const NMPlatformVTableRoute *vtable, gboolean has, const NMPlatformIPXRoute *route)
 {
 	const NMPlatformIPXRoute *r;
+	NMPlatformIPXRoute c;
 
 	g_assert (route);
 
@@ -800,11 +800,18 @@ _assert_route_check (const NMPlatformVTableRoute *vtable, gboolean has, const NM
 	} else {
 		char buf[sizeof (_nm_utils_to_string_buffer)];
 
-		if (!r || vtable->route_cmp (route, r) != 0)
+		if (r) {
+			if (vtable->is_ip4)
+				c.r4 = route->r4;
+			else
+				c.r6 = route->r6;
+			c.rx.rt_source = nmp_utils_ip_config_source_round_trip_rtprot (c.rx.rt_source);
+		}
+		if (!r || vtable->route_cmp (r, &c) != 0) {
 			g_error ("Invalid route. Expect %s, has %s",
-			         vtable->route_to_string (route, NULL, 0),
+			         vtable->route_to_string (&c, NULL, 0),
 			         vtable->route_to_string (r, buf, sizeof (buf)));
-		g_assert (r);
+		}
 	}
 }