ipconfig: Set/unset IPv4 rp_filter setting

diff --git a/src/connman.h b/src/connman.h
index e2b0f1c..3871a4b 100644 (file)
--- a/src/connman.h
+++ b/src/connman.h
@@ -249,6 +249,9 @@ int __connman_ipconfig_load(struct connman_ipconfig *ipconfig,
 int __connman_ipconfig_save(struct connman_ipconfig *ipconfig,
                GKeyFile *keyfile, const char *identifier, const char *prefix);
 
+int __connman_ipconfig_set_rp_filter();
+void __connman_ipconfig_unset_rp_filter(int old_value);
+
 #include <connman/utsname.h>
 
 int __connman_utsname_set_hostname(const char *hostname);

diff --git a/src/ipconfig.c b/src/ipconfig.c
index fd858a1..da61446 100644 (file)
--- a/src/ipconfig.c
+++ b/src/ipconfig.c
@@ -452,6 +452,60 @@ static void set_ipv6_privacy(gchar *ifname, int value)
        fclose(f);
 }
 
+static int get_rp_filter()
+{
+       FILE *f;
+       int value = -EINVAL, tmp;
+
+       f = fopen("/proc/sys/net/ipv4/conf/all/rp_filter", "r");
+
+       if (f != NULL) {
+               if (fscanf(f, "%d", &tmp) == 1)
+                       value = tmp;
+               fclose(f);
+       }
+
+       return value;
+}
+
+static void set_rp_filter(int value)
+{
+       FILE *f;
+
+       f = fopen("/proc/sys/net/ipv4/conf/all/rp_filter", "r+");
+
+       if (f == NULL)
+               return;
+
+       fprintf(f, "%d", value);
+
+       fclose(f);
+}
+
+int __connman_ipconfig_set_rp_filter()
+{
+       int value;
+
+       value = get_rp_filter();
+
+       if (value < 0)
+               return value;
+
+       set_rp_filter(2);
+
+       connman_info("rp_filter set to 2 (loose mode routing), "
+                       "old value was %d", value);
+
+       return value;
+}
+
+void __connman_ipconfig_unset_rp_filter(int old_value)
+{
+       set_rp_filter(old_value);
+
+       connman_info("rp_filter restored to %d", old_value);
+}
+
 static void free_ipdevice(gpointer data)
 {
        struct connman_ipdevice *ipdevice = data;