Function sr

scapy/sendrecv.py:692–721

Send and receive packets at layer 3 This determines the interface (or L2 source to use) based on the routing table: conf.route / conf.route6

(x,  # type: _PacketIterable
       promisc=None,  # type: Optional[bool]
       filter=None,  # type: Optional[str]
       nofilter=0,  # type: int
       *args,  # type: Any
       **kargs  # type: Any
       )

@conf.commands.register
def sr(x,  # type: _PacketIterable
       promisc=None,  # type: Optional[bool]
       filter=None,  # type: Optional[str]
       nofilter=0,  # type: int
       *args,  # type: Any
       **kargs  # type: Any
       ):
    # type: (...) -> Tuple[SndRcvList, PacketList]
    """
    Send and receive packets at layer 3

    This determines the interface (or L2 source to use) based on the routing
    table: conf.route / conf.route6
    """
    if "iface" in kargs:
        # Warn that it isn't used.
        warnings.warn(
            "'iface' has no effect on L3 I/O sr(). For multicast/link-local "
            "see https://scapy.readthedocs.io/en/latest/usage.html#multicast",
            SyntaxWarning,
        )
        del kargs["iface"]
    iface, ipv6 = _interface_selection(x)
    s = iface.l3socket(ipv6)(
        promisc=promisc, filter=filter,
        iface=iface, nofilter=nofilter,
    )
    result = sndrcv(s, x, *args, **kargs)
    s.close()
    return result


@conf.commands.register