Rhialto <rhialto%falu.nl@localhost> writes: > On Sun 08 Apr 2007 at 16:21:48 +0200, Rhialto wrote: >> BPF sees packets that come in from the wire and optionally (default >> on; BIOCSSEESENT; apparently undocumented) the packets that the host >> sends to the wire. > > This seems to be documented now in bpf(4). This flag applies to packets injected via BPF, or is it also about bpf seeing normal outgoing packets? The man page (5-stable) is not really clear. >> Packets injected into BPF are sent to the wire only, not to the host. > > FreeBSD now apparently has an ioctl for this: > > BIOCFEEDBACK (u_int) Set packet feedback mode. This allows injected > packets to be fed back as input to the interface when > output via the interface is successful. When BPF_D_INOUT > direction is set, injected outgoing packet is not > returned by BPF to avoid duplication. This flag is ini- > tialized to zero by default. Is this separate from the bpf-ought-to-work-on-tap notion, and about how writes to bpf can be made to interoperate with the local host? If so, do we need to port BIOCFEEDBACK to NetBSD's bpf implementation?
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