TCPOPT_SACK_PERMITTED  220 net/pf_osfp.c  			case TCPOPT_SACK_PERMITTED:
TCPOPT_SACK_PERMITTED   97 netinet/tcp.h  (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK_PERMITTED<<8|TCPOLEN_SACK_PERMITTED)
TCPOPT_SACK_PERMITTED 2324 netinet/tcp_input.c 		case TCPOPT_SACK_PERMITTED: