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- BIOCGDIRECTION and BIOCSDIRECTION get or set the setting determining whether incoming, outgoing, or all packets on the interface should be returned by BPF. Set to BPF_D_IN to see only incoming packets on the interface. Set to BPF_D_INOUT to see packets originating locally and remotely on the interface. Set to BPF_D_OUT to see only outgoing packets on the interface. This setting is initialized to BPF_D_INOUT by default. BIOCGSEESENT and BIOCSSEESENT are obsoleted by these but kept for backward compatibility. - BIOCFEEDBACK sets 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 initialized to zero by default. Note that libpcap has been modified to support BPF_D_OUT direction for pcap_setdirection(3) and PCAP_D_OUT direction is functional now. Reviewed by: rwatson |
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