Here are the classes, structs, unions and interfaces with brief descriptions:

Csr_arp_hdr	Struct of an ARP header
Csr_arpcache	An ARP cache which tracks IP/MAC mappings, as well as outstanding ARP requests
Csr_arpentry	An entry in the ARP cache
Csr_arpreq	An outstanding ARP request with queued packets waiting on the response
Csr_ethernet_hdr	Struct of an Ethernet Header
Csr_icmp_hdr	General struct of a ICMP header
Csr_icmp_t0_hdr	Struct of a Type-0 (echo reply) ICMP header
Csr_icmp_t11_hdr	Struct of a Type-11 (TTL exceeded) ICMP header
Csr_icmp_t3_hdr	Struct of a Type-3 (destination unreachable) ICMP header
Csr_if	A node in the interface list of the router
Csr_instance	Struct which encapsulates all the state of a single router
Csr_ip_hdr	Struct of an IP header, without options
Csr_packet	A packet queued, waiting for the resolution of an sr_arpreq
Csr_rt