The common characteristics of peer-to-peer (P2P) overlay networks and wireless multi-hop network,such as self-organization,decentralization,hop-by-hop message transmission mode and high degree of dynamicity,lead to research of operating wired P2P applications on wireless multi-hop networks.Wireless mesh network (WMN) as a relative static multi-hop wireless network which is extended from Ad-Hoc networks,has become one of the key technologies for providing increased network coverage of Internet infrastructures.This paper investigates the problem of enabling P2P file sharing in WMNs.A special chord algorithm-spiralchord is proposed to address the major problem in wireless file sharing system—how to efficiently find resources currently available.Spiralchord put forward an identifier (ID) assignment technique based on spiral space-filling curve to integrate location-awareness with cross-layering.Location awareness aims at alleviating the mismatch of physical network topology and overlay network topology,and requires close-by IDs in logical ring of neighboring peers,while cross-layering aims at speeding up resource lookup operations,requires faraway IDs of neighboring peers.Spiralchord uses spiral curve to assign peers IDs which meet the contradictory requirements of location-awareness and cross-layering.The simulation results show spiralchord is effective in reducing message overhead,and increasing lookup performance with respect to basic chord.