bsd/net/bpf.c

188 static errno_t	bpf_attachd(struct bpf_d *d, struct bpf_if *bp);
466  * Attach file to the bpf interface, i.e. make d listen on bp.
469 bpf_attachd(struct bpf_d *d, struct bpf_if *bp)
471 	int first = bp->bif_dlist == NULL;
475 	 * Point d at bp, and add d to the interface's list of listeners.
479 	d->bd_bif = bp;
480 	d->bd_next = bp->bif_dlist;
481 	bp->bif_dlist = d;
485 		if (bp->bif_ifp->if_bpf == NULL) {
488 			for (primary = bpf_iflist; primary && primary->bif_ifp != bp->bif_ifp;
492 			bp->bif_ifp->if_bpf = primary;
496 		if (bp->bif_ifp->if_bpf == bp)
497 			dlil_set_bpf_tap(bp->bif_ifp, BPF_TAP_INPUT_OUTPUT, bpf_tap_callback);
499 		if (bp->bif_tap)
500 			error = bp->bif_tap(bp->bif_ifp, bp->bif_dlt, BPF_TAP_INPUT_OUTPUT);
513 	struct bpf_if *bp;
517 	bp = d->bd_bif;
520 	p = &bp->bif_dlist;
527 	if (bp->bif_dlist == 0) {
532 		if (bp->bif_ifp->if_bpf == bp)
534 		if (bp->bif_tap)
535 			bp->bif_tap(ifp, bp->bif_dlt, BPF_TAP_DISABLE);
537 		for (bp = bpf_iflist; bp; bp = bp->bif_next)
538 			if (bp->bif_ifp == ifp && bp->bif_dlist != 0)
540 		if (bp == NULL)
1623 	struct bpf_if *bp;
1629 	for (bp = bpf_iflist; bp != 0; bp = bp->bif_next) {
1630 		struct ifnet *ifp = bp->bif_ifp;
1632 		if (ifp == 0 || ifp != theywant || (dlt != 0 && dlt != bp->bif_dlt))
1645 		if (bp != d->bd_bif) {
1652 			if (bpf_attachd(d, bp) != 0) {
1674 	struct bpf_if	*bp;
1688 	for (bp = bpf_iflist; bp; bp = bp->bif_next) {
1689 		if (bp->bif_ifp != ifp)
1695 			error = copyout(&bp->bif_dlt, dlist,
1696 			    sizeof (bp->bif_dlt));
1699 			dlist += sizeof (bp->bif_dlt);
1719 	struct bpf_if *bp;
1724 	for (bp = bpf_iflist; bp; bp = bp->bif_next) {
1725 		if (bp->bif_ifp == ifp && bp->bif_dlt == dlt)
1728 	if (bp != NULL) {
1731 		error = bpf_attachd(d, bp);
1734 				ifnet_name(bp->bif_ifp), ifnet_unit(bp->bif_ifp), error);
1740 			error = ifnet_set_promiscuous(bp->bif_ifp, 1);
1744 					   ifnet_name(bp->bif_ifp), ifnet_unit(bp->bif_ifp), error);
1749 	return (bp == NULL ? EINVAL : 0);
1981 	struct bpf_if *bp;
2001 	bp = ifp->if_bpf;
2002 	for (bp = ifp->if_bpf; bp && bp->bif_ifp == ifp &&
2003 		 (dlt != 0 && bp->bif_dlt != dlt); bp = bp->bif_next)
2005 	if (bp && bp->bif_ifp == ifp && bp->bif_dlist != NULL) {
2039 		for (d = bp->bif_dlist; d; d = d->bd_next) {
2046 				if (mac_bpfdesc_check_receive(d, bp->bif_ifp) != 0)
2332 	struct bpf_if	*bp, *bp_prev, *bp_next;
2341 	for (bp = bpf_iflist; bp != NULL; bp = bp_next) {
2342 		bp_next = bp->bif_next;
2343 		if (ifp != bp->bif_ifp) {
2344 			bp_prev = bp;
2348 		while ((d = bp->bif_dlist) != NULL) {
2354 			bp_prev->bif_next = bp->bif_next;
2356 			bpf_iflist = bp->bif_next;
2359 		bp->bif_next = bp_free;
2360 		bp_free = bp;
2367 	FREE(bp, M_DEVBUF);