<dec f='src/src/sys/net/if.h' l='916'/>
<use f='src/src/sys/net/if_gif.c' l='397' u='c'/>
<use f='src/src/sys/net/if_ppp.c' l='894' u='c'/>
<use f='src/src/sys/net/if_sl.c' l='472' u='c'/>
<use f='src/src/sys/net/if_spppsubr.c' l='699' u='c'/>
<use f='src/src/sys/net/if_tun.c' l='564' u='c'/>
