pflog - packet filter logging interface
The pflog0 interface is created automatically at boot if both pf(4) and pflogd(8) are enabled; further instances can be created using ifconfig(8).
Each packet retrieved on this interface has a header associated with it of length PFLOG_HDRLEN This header documents the address family, interface name, rule number, reason, action, and direction of the packet that was logged. This structure, defined in Aq Pa net/if_pflog.h looks like
struct pfloghdr { u_int8_t length; sa_family_t af; u_int8_t action; u_int8_t reason; char ifname[IFNAMSIZ]; char ruleset[PF_RULESET_NAME_SIZE]; u_int32_t rulenr; u_int32_t subrulenr; uid_t uid; pid_t pid; uid_t rule_uid; pid_t rule_pid; u_int8_t dir; u_int8_t pad[3]; };
# ifconfig pflog1 up # tcpdump -n -e -ttt -i pflog1
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