IP_FLOWID (reference) in projects: freebsd-13-stable

510 #define	IP_FLOWID		90   /* get flow id for the given socket/inp */  macro

1351 		    sizeof(uint32_t), IP_FLOWID, IPPROTO_IP);  in ip_savecontrol()

1083 	X(IP_RECVIF) X(IP_RECVTOS) X(IP_FLOWID) X(IP_FLOWTYPE)

/freebsd-13-stable/sys/netinet/
H D	in.h	`510 #define IP_FLOWID 90 /* get flow id for the given socket/inp */ macro`
H D	ip_output.c	`1433 case IP_FLOWID: in ip_ctloutput() 1502 case IP_FLOWID: in ip_ctloutput()`
H D	ip_input.c	`1351 sizeof(uint32_t), IP_FLOWID, IPPROTO_IP); in ip_savecontrol()`
H D	udp_usrreq.c	`1254 case IP_FLOWID: in udp_output()`
/freebsd-13-stable/lib/libsysdecode/
H D	flags.c	`1083 X(IP_RECVIF) X(IP_RECVTOS) X(IP_FLOWID) X(IP_FLOWTYPE)`