ref: 41e27b2d10c6a60c49931332e8677438736a1e36
dir: /os/ip/iprouter.c/
#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "../port/error.h" #include "../ip/ip.h" IProuter iprouter; /* * User level routing. Ip packets we don't know what to do with * come here. */ void useriprouter(Fs *f, Ipifc *ifc, Block *bp) { qlock(&f->iprouter); if(f->iprouter.q != nil){ bp = padblock(bp, IPaddrlen); if(bp == nil) return; ipmove(bp->rp, ifc->lifc->local); qpass(f->iprouter.q, bp); }else freeb(bp); qunlock(&f->iprouter); } void iprouteropen(Fs *f) { qlock(&f->iprouter); f->iprouter.opens++; if(f->iprouter.q == nil) f->iprouter.q = qopen(64*1024, 0, 0, 0); else if(f->iprouter.opens == 1) qreopen(f->iprouter.q); qunlock(&f->iprouter); } void iprouterclose(Fs *f) { qlock(&f->iprouter); f->iprouter.opens--; if(f->iprouter.opens == 0) qclose(f->iprouter.q); qunlock(&f->iprouter); } long iprouterread(Fs *f, void *a, int n) { return qread(f->iprouter.q, a, n); }