Add disambiguation algorithm.

Makefile

@@ -9,10 +9,12 @@ CFLAGS = $(CDEBUGFLAGS) $(DEFINES) $(EXTRA_DEFINES)
 LDLIBS = -lrt
 
 SRCS = babeld.c net.c kernel.c util.c interface.c source.c neighbour.c \
-       route.c xroute.c message.c resend.c configuration.c local.c
+       route.c xroute.c message.c resend.c configuration.c local.c \
+       disambiguation.c
 
 OBJS = babeld.o net.o kernel.o util.o interface.o source.o neighbour.o \
-       route.o xroute.o message.o resend.o configuration.o local.o
+       route.o xroute.o message.o resend.o configuration.o local.o \
+       disambiguation.o
 
 babeld: $(OBJS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o babeld $(OBJS) $(LDLIBS)

disambiguation.h

+/*
+Copyright (c) 2014 by Matthieu Boutier and Juliusz Chroboczek.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+int kinstall_route(struct babel_route *route);
+int kuninstall_route(struct babel_route *route);
+int kswitch_routes(struct babel_route *old, struct babel_route *new);
+int kchange_route_metric(struct babel_route *route,
+                         unsigned refmetric, unsigned cost, unsigned add);