Add per UID interface support to resolv cache
Add methods to attach/detach UID ranges to a specific dns cache/interface.
This mirrors the already existing code for attaching specific processes to
specific interfaces but will be used to push all processes from a given
user to a specific cache/interface.
Change-Id: Ic24391e92d3ca46fcb46cc4fc53e13984dec40b3
diff --git a/libc/private/resolv_iface.h b/libc/private/resolv_iface.h
index 789d997..6be97c1 100644
--- a/libc/private/resolv_iface.h
+++ b/libc/private/resolv_iface.h
@@ -75,6 +75,24 @@
* buffLen Length of buff. An interface is at most IF_NAMESIZE in length */
extern int _resolv_get_pids_associated_interface(int pid, char* buff, int buffLen);
+
+/** set a uid range to use the name servers of the specified interface
+ * If [low,high] overlaps with an already existing rule -1 is returned */
+extern int _resolv_set_iface_for_uid_range(const char* ifname, int low, int high);
+
+/* clear a uid range from being associated with an interface
+ * If the range given is not mapped -1 is returned. */
+extern int _resolv_clear_iface_for_uid_range(int low, int high);
+
+/** Gets the name of the interface to which the uid is attached.
+ * On error, -1 is returned.
+ * If no interface is found, 0 is returned and buff is set to empty ('\0').
+ * If an interface is found, the name is copied to buff and the length of the name is returned.
+ * Arguments: uid The uid to find an interface for
+ * buff A buffer to copy the result to
+ * buffLen Length of buff. An interface is at most IF_NAMESIZE in length */
+extern int _resolv_get_uids_associated_interface(int uid, char* buff, int buffLen);
+
#endif /* _BIONIC_RESOLV_IFACE_FUNCTIONS_DECLARED */
__END_DECLS