0x3F61EC00 is rip_input() (raw_ip.c:58): PCB-list walk on protocol/laddr/
faddr, sbappendaddr delivery, and the ips_noproto counter we recorded at
0x96500. The dsj gate compares that PCB field against 1 -- the raw socket
bound to ICMP -- so the 5/8/13..18 skip list is the raw-ICMP filter for types
the kernel answers itself.
The two TCP state tables map onto tcp_input's two switch(tp->t_state) sites
(506 and 865); table A's shared handler for CLOSING/LAST_ACK/TIME_WAIT matches
the source's fallthrough group at 840-842. ICMP checksum verify and reflect
match ip_icmp.c:184 and 522-523.
arti
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