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NetworkManager/0007-ip4-config-0.0.0.0-is-a-valid-gateway-too.patch

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From f11e4c31ee9014304f05b4ccfc6e2b2c934e9ee4 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Tue, 21 Jul 2015 23:07:34 +0200
Subject: [PATCH 07/11] ip4-config: 0.0.0.0 is a valid gateway too
It makes sense for point-to point links.
https://bugzilla.redhat.com/show_bug.cgi?id=1244483
(cherry picked from commit 063677101ab7d43a9aa94c70eb1ca3a201269043)
---
src/devices/nm-device.c | 2 +-
src/nm-ip4-config.c | 67 ++++++++++++++++------
src/nm-ip4-config.h | 2 +
.../plugins/ifcfg-rh/tests/test-ifcfg-rh.c | 2 +-
4 files changed, 53 insertions(+), 20 deletions(-)
diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index a0aaf03..9f8c488 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -3342,7 +3342,7 @@ ip4_config_merge_and_apply (NMDevice *self,
}
gateway = nm_ip4_config_get_gateway (composite);
- if ( !gateway
+ if ( !nm_ip4_config_has_gateway (composite)
&& nm_device_get_device_type (self) != NM_DEVICE_TYPE_MODEM)
goto END_ADD_DEFAULT_ROUTE;
diff --git a/src/nm-ip4-config.c b/src/nm-ip4-config.c
index 1b48517..035849e 100644
--- a/src/nm-ip4-config.c
+++ b/src/nm-ip4-config.c
@@ -45,6 +45,7 @@ typedef struct {
gboolean never_default;
guint32 gateway;
+ gboolean has_gateway;
GArray *addresses;
GArray *routes;
GArray *nameservers;
@@ -187,7 +188,7 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
guint i;
guint32 lowest_metric = G_MAXUINT32;
guint32 old_gateway = 0;
- gboolean has_gateway = FALSE;
+ gboolean old_has_gateway = FALSE;
/* Slaves have no IP configuration */
if (nm_platform_link_get_master (NM_PLATFORM_GET, ifindex) > 0)
@@ -204,6 +205,7 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
/* Extract gateway from default route */
old_gateway = priv->gateway;
+ old_has_gateway = priv->has_gateway;
for (i = 0; i < priv->routes->len; ) {
const NMPlatformIP4Route *route = &g_array_index (priv->routes, NMPlatformIP4Route, i);
@@ -212,7 +214,7 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
priv->gateway = route->gateway;
lowest_metric = route->metric;
}
- has_gateway = TRUE;
+ priv->has_gateway = TRUE;
/* Remove the default route from the list */
g_array_remove_index_fast (priv->routes, i);
continue;
@@ -222,12 +224,12 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
/* we detect the route metric based on the default route. All non-default
* routes have their route metrics explicitly set. */
- priv->route_metric = has_gateway ? (gint64) lowest_metric : (gint64) -1;
+ priv->route_metric = priv->has_gateway ? (gint64) lowest_metric : (gint64) -1;
/* If there is a host route to the gateway, ignore that route. It is
* automatically added by NetworkManager when needed.
*/
- if (has_gateway) {
+ if (priv->has_gateway) {
for (i = 0; i < priv->routes->len; i++) {
const NMPlatformIP4Route *route = &g_array_index (priv->routes, NMPlatformIP4Route, i);
@@ -243,7 +245,7 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
/* If the interface has the default route, and has IPv4 addresses, capture
* nameservers from /etc/resolv.conf.
*/
- if (priv->addresses->len && has_gateway && capture_resolv_conf) {
+ if (priv->addresses->len && priv->has_gateway && capture_resolv_conf) {
if (nm_ip4_config_capture_resolv_conf (priv->nameservers, NULL))
_NOTIFY (config, PROP_NAMESERVERS);
}
@@ -253,7 +255,8 @@ nm_ip4_config_capture (int ifindex, gboolean capture_resolv_conf)
_NOTIFY (config, PROP_ROUTE_DATA);
_NOTIFY (config, PROP_ADDRESSES);
_NOTIFY (config, PROP_ROUTES);
- if (priv->gateway != old_gateway)
+ if ( priv->gateway != old_gateway
+ || priv->has_gateway != old_has_gateway)
_NOTIFY (config, PROP_GATEWAY);
return config;
@@ -484,7 +487,7 @@ nm_ip4_config_create_setting (const NMIP4Config *config)
}
/* Gateway */
- if ( gateway
+ if ( nm_ip4_config_has_gateway (config)
&& nm_setting_ip_config_get_num_addresses (s_ip4) > 0) {
g_object_set (s_ip4,
NM_SETTING_IP_CONFIG_GATEWAY, nm_utils_inet4_ntop (gateway, NULL),
@@ -561,7 +564,7 @@ nm_ip4_config_merge (NMIP4Config *dst, const NMIP4Config *src)
nm_ip4_config_add_nameserver (dst, nm_ip4_config_get_nameserver (src, i));
/* default gateway */
- if (nm_ip4_config_get_gateway (src))
+ if (nm_ip4_config_has_gateway (src))
nm_ip4_config_set_gateway (dst, nm_ip4_config_get_gateway (src));
/* routes */
@@ -752,11 +755,12 @@ nm_ip4_config_subtract (NMIP4Config *dst, const NMIP4Config *src)
}
/* default gateway */
- if (nm_ip4_config_get_gateway (src) == nm_ip4_config_get_gateway (dst))
- nm_ip4_config_set_gateway (dst, 0);
+ if ( (nm_ip4_config_has_gateway (src) == nm_ip4_config_has_gateway (dst))
+ && (nm_ip4_config_get_gateway (src) == nm_ip4_config_get_gateway (dst)))
+ nm_ip4_config_unset_gateway (dst);
if (!nm_ip4_config_get_num_addresses (dst))
- nm_ip4_config_set_gateway (dst, 0);
+ nm_ip4_config_unset_gateway (dst);
/* ignore route_metric */
@@ -834,8 +838,10 @@ nm_ip4_config_intersect (NMIP4Config *dst, const NMIP4Config *src)
/* default gateway */
if ( !nm_ip4_config_get_num_addresses (dst)
- || (nm_ip4_config_get_gateway (src) != nm_ip4_config_get_gateway (dst)))
- nm_ip4_config_set_gateway (dst, 0);
+ || (nm_ip4_config_has_gateway (src) != nm_ip4_config_has_gateway (dst))
+ || (nm_ip4_config_get_gateway (src) != nm_ip4_config_get_gateway (dst))) {
+ nm_ip4_config_unset_gateway (dst);
+ }
/* routes */
for (i = 0; i < nm_ip4_config_get_num_routes (dst); ) {
@@ -901,7 +907,8 @@ nm_ip4_config_replace (NMIP4Config *dst, const NMIP4Config *src, gboolean *relev
}
/* default gateway */
- if (src_priv->gateway != dst_priv->gateway) {
+ if ( src_priv->gateway != dst_priv->gateway
+ || src_priv->has_gateway != dst_priv->has_gateway) {
nm_ip4_config_set_gateway (dst, src_priv->gateway);
has_relevant_changes = TRUE;
}
@@ -1104,8 +1111,10 @@ nm_ip4_config_dump (const NMIP4Config *config, const char *detail)
g_message (" a: %s", nm_platform_ip4_address_to_string (nm_ip4_config_get_address (config, i)));
/* default gateway */
- tmp = nm_ip4_config_get_gateway (config);
- g_message (" gw: %s", nm_utils_inet4_ntop (tmp, NULL));
+ if (nm_ip4_config_has_gateway (config)) {
+ tmp = nm_ip4_config_get_gateway (config);
+ g_message (" gw: %s", nm_utils_inet4_ntop (tmp, NULL));
+ }
/* nameservers */
for (i = 0; i < nm_ip4_config_get_num_nameservers (config); i++) {
@@ -1185,12 +1194,33 @@ nm_ip4_config_set_gateway (NMIP4Config *config, guint32 gateway)
{
NMIP4ConfigPrivate *priv = NM_IP4_CONFIG_GET_PRIVATE (config);
- if (priv->gateway != gateway) {
+ if (priv->gateway != gateway || !priv->has_gateway) {
priv->gateway = gateway;
+ priv->has_gateway = TRUE;
+ _NOTIFY (config, PROP_GATEWAY);
+ }
+}
+
+void
+nm_ip4_config_unset_gateway (NMIP4Config *config)
+{
+ NMIP4ConfigPrivate *priv = NM_IP4_CONFIG_GET_PRIVATE (config);
+
+ if (priv->has_gateway) {
+ priv->gateway = 0;
+ priv->has_gateway = FALSE;
_NOTIFY (config, PROP_GATEWAY);
}
}
+gboolean
+nm_ip4_config_has_gateway (const NMIP4Config *config)
+{
+ NMIP4ConfigPrivate *priv = NM_IP4_CONFIG_GET_PRIVATE (config);
+
+ return priv->has_gateway;
+}
+
guint32
nm_ip4_config_get_gateway (const NMIP4Config *config)
{
@@ -1832,6 +1862,7 @@ nm_ip4_config_hash (const NMIP4Config *config, GChecksum *sum, gboolean dns_only
g_return_if_fail (sum);
if (!dns_only) {
+ hash_u32 (sum, nm_ip4_config_has_gateway (config));
hash_u32 (sum, nm_ip4_config_get_gateway (config));
for (i = 0; i < nm_ip4_config_get_num_addresses (config); i++) {
@@ -2093,7 +2124,7 @@ get_property (GObject *object, guint prop_id,
}
break;
case PROP_GATEWAY:
- if (priv->gateway)
+ if (priv->has_gateway)
g_value_set_string (value, nm_utils_inet4_ntop (priv->gateway, NULL));
else
g_value_set_string (value, NULL);
diff --git a/src/nm-ip4-config.h b/src/nm-ip4-config.h
index fb07240..2bb766a 100644
--- a/src/nm-ip4-config.h
+++ b/src/nm-ip4-config.h
@@ -80,6 +80,8 @@ void nm_ip4_config_dump (const NMIP4Config *config, const char *detail);
void nm_ip4_config_set_never_default (NMIP4Config *config, gboolean never_default);
gboolean nm_ip4_config_get_never_default (const NMIP4Config *config);
void nm_ip4_config_set_gateway (NMIP4Config *config, guint32 gateway);
+void nm_ip4_config_unset_gateway (NMIP4Config *config);
+gboolean nm_ip4_config_has_gateway (const NMIP4Config *config);
guint32 nm_ip4_config_get_gateway (const NMIP4Config *config);
gint64 nm_ip4_config_get_route_metric (const NMIP4Config *config);
diff --git a/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c b/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
index d2fb686..0edbe9b 100644
--- a/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
+++ b/src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c
@@ -6405,7 +6405,7 @@ test_write_wired_static_ip6_only_gw (gconstpointer user_data)
g_assert (addr6);
/* assert that the gateway was written and reloaded as expected */
- if (!gateway6 || !strcmp (gateway6, "::")) {
+ if (!gateway6) {
g_assert (nm_setting_ip_config_get_gateway (s_ip6) == NULL);
g_assert (written_ifcfg_gateway == NULL);
} else {
--
2.4.3
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