ipsec_require_pfs 2016 net/pfkeyv2.c  		if (ipsec_require_pfs)
ipsec_require_pfs  533 netinet/in.h   	&ipsec_require_pfs, \
ipsec_require_pfs   80 netinet/ip_input.c int ipsec_require_pfs = IPSEC_DEFAULT_PFS;
ipsec_require_pfs  446 netinet/ip_ipsp.h extern int ipsec_require_pfs;