Route information exchange method, a communication terminal and routing information exchange program

In the exchange of route information of the mobile ad hoc network, and to provide routing information exchange method capable exchange of routing information for different other routing domains and routing domains that a communication terminal itself belonging to the network belongs. Communication terminal (A1) receives the routing message from another communication terminal (B1), using the path control determining unit (A 131), routing domains described in said route control message, the own communication terminal (A1 ) as long as it belongs to, the path information update management using MANET routing unit (A133), as long as the own communication terminal (A1) does not belong, DTN routing unit other by (a 132) update manages route information to the routing domain, and, by using the route information advertisement section (A134), to another communication terminal (B1), routing domains and other routing domains self communication terminal (A1) belongs the route information to advertise to.