Wireless Mesh network (WMN) is a form of Wireless Ad hoc network, where mesh topology is used to connect the radio nodes together and it is prone to vulnerabilities due to its open architecture. Packet loss is the major issue due to its open wireless physical media, frequent topological changes, scalability and power constraints. The most common blackhole and grayhole attacks besieged on network layer degrade the performance of WMN by dropping packets during transmission. In general, packet drops in WMN during transmission may happen due to mobility or buffer overflow or power depletion or malicious behavior of the intermediate nodes. This paper proposes an Adaptive Dynamic Source Routing protocol (ADSR) to detect the actual cause for packet drops, identify and isolate the misbehaving nodes using the cross layer metrics. It employs proactive, reactive mode of detection of packet dropping nodes and the packets are rerouted through alternate paths using packet salvaging technique. Bait-RREQ with virtual IP address is used to detect the blackhole nodes proactively and node behavior analysis is used to detect the packet dropping nodes reactively. The performance of ADSR is analyzed using a mathematical model by considering the characteristics of a node’s behavior. Using extensive simulations the performances are thoroughly analyzed, evaluated and compared with traditional DSR, WatchDog (WD), Bait-DSR (BDSR) protocols. Simulation results show that ADSR is better than other mentioned protocols with negligible increase in network overhead (less than 2%) which is due to the use of Bait-RREQ and packet salvaging technique. The proper identification of actual cause for packet drops significantly reduces the false positive rate of detection of malicious nodes with an increased packet delivery ratio (not lower than 95%) and throughput.

无线网状网络（WMN）是无线自组织网络的一种形式，其中网状拓扑结构用于将无线电节点连接在一起，并且由于其开放式体系结构而容易受到漏洞的攻击。由于其开放的无线物理介质，频繁的拓扑变化，可伸缩性和功率限制，数据包丢失是主要问题。网络层上最常见的黑洞和灰洞攻击会在传输过程中丢弃数据包，从而降低WMN的性能。通常，由于移动性或缓冲区溢出，功率损耗或中间节点的恶意行为，可能在传输过程中发生WMN中的数据包丢失。本文提出了一种自适应动态源路由协议（ADSR），用于检测丢包的实际原因，使用跨层度量来识别和隔离行为异常的节点。它采用主动，数据包丢弃节点的无反应模式检测和数据包使用数据包抢救技术通过备用路径重新路由。具有虚拟IP地址的Bait-RREQ用于主动检测黑洞节点，节点行为分析用于被动检测丢包节点。通过考虑节点行为的特征，使用数学模型来分析ADSR的性能。通过广泛的仿真，可以对性能进行彻底的分析，评估，并与传统的DSR，WatchDog（WD），Bait-DSR（BDSR）协议进行比较。仿真结果表明，由于使用了Bait-RREQ和数据包回收技术，ADSR优于其他提到的协议，网络开销的增加可以忽略不计（不到2％）。