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netlink: allow creating sockets with SOCK_DGRAM.
Some existing applications setup Netlink socket with SOCK_DGRAM instead of SOCK_RAW. Update the manpage to clarify that the default way of creating the socket should be with SOCK_RAW. Update the code to support both SOCK_RAW and SOCK_DGRAM. Reviewed By: pauamma Differential Revision: https://reviews.freebsd.org/D38075
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@ -34,7 +34,7 @@
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.In netlink/netlink.h
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.In netlink/netlink_route.h
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.Ft int
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.Fn socket AF_NETLINK SOCK_DGRAM int family
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.Fn socket AF_NETLINK SOCK_RAW "int family"
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.Sh DESCRIPTION
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Netlink is a user-kernel message-based communication protocol primarily used
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for network stack configuration.
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@ -293,7 +293,7 @@ This is the default level, not impacting production performance.
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Socket events such as groups memberships, privilege checks, commands and dumps
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are logged.
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This level does not incur significant performance overhead.
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.It Dv LOG_DEBUG9(9)
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.It Dv LOG_DEBUG3(9)
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All socket events, each dumped or modified entities are logged.
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Turning it on may result in significant performance overhead.
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.El
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@ -34,7 +34,7 @@
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.In netlink/netlink.h
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.In netlink/netlink_route.h
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.Ft int
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.Fn socket AF_NETLINK SOCK_DGRAM NETLINK_ROUTE
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.Fn socket AF_NETLINK SOCK_RAW NETLINK_ROUTE
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.Sh DESCRIPTION
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The
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.Dv NETLINK_ROUTE
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@ -698,31 +698,39 @@ nl_setsbopt(struct socket *so, struct sockopt *sopt)
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return (result ? 0 : ENOBUFS);
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}
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static struct protosw netlinksw = {
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.pr_type = SOCK_RAW,
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_WANTRCVD,
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.pr_ctloutput = nl_ctloutput,
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.pr_setsbopt = nl_setsbopt,
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.pr_abort = nl_pru_abort,
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.pr_attach = nl_pru_attach,
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.pr_bind = nl_pru_bind,
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.pr_connect = nl_pru_connect,
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.pr_detach = nl_pru_detach,
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.pr_disconnect = nl_pru_disconnect,
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.pr_peeraddr = nl_pru_peeraddr,
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.pr_send = nl_pru_send,
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.pr_rcvd = nl_pru_rcvd,
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.pr_shutdown = nl_pru_shutdown,
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.pr_sockaddr = nl_pru_sockaddr,
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#define NETLINK_PROTOSW \
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.pr_flags = PR_ATOMIC | PR_ADDR | PR_WANTRCVD, \
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.pr_ctloutput = nl_ctloutput, \
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.pr_setsbopt = nl_setsbopt, \
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.pr_abort = nl_pru_abort, \
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.pr_attach = nl_pru_attach, \
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.pr_bind = nl_pru_bind, \
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.pr_connect = nl_pru_connect, \
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.pr_detach = nl_pru_detach, \
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.pr_disconnect = nl_pru_disconnect, \
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.pr_peeraddr = nl_pru_peeraddr, \
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.pr_send = nl_pru_send, \
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.pr_rcvd = nl_pru_rcvd, \
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.pr_shutdown = nl_pru_shutdown, \
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.pr_sockaddr = nl_pru_sockaddr, \
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.pr_close = nl_pru_close
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static struct protosw netlink_raw_sw = {
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.pr_type = SOCK_RAW,
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NETLINK_PROTOSW
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};
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static struct protosw netlink_dgram_sw = {
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.pr_type = SOCK_DGRAM,
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NETLINK_PROTOSW
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};
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static struct domain netlinkdomain = {
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.dom_family = PF_NETLINK,
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.dom_name = "netlink",
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.dom_flags = DOMF_UNLOADABLE,
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.dom_nprotosw = 1,
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.dom_protosw = { &netlinksw },
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.dom_nprotosw = 2,
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.dom_protosw = { &netlink_raw_sw, &netlink_dgram_sw },
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};
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DOMAIN_SET(netlink);
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@ -6,6 +6,7 @@ WARNS?= 1
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TESTSDIR= ${TESTSBASE}/sys/netlink
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ATF_TESTS_C += test_snl
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ATF_TESTS_PYTEST += test_nl_core.py
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ATF_TESTS_PYTEST += test_rtnl_iface.py
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ATF_TESTS_PYTEST += test_rtnl_ifaddr.py
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33
tests/sys/netlink/test_nl_core.py
Normal file
33
tests/sys/netlink/test_nl_core.py
Normal file
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@ -0,0 +1,33 @@
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import errno
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import socket
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import pytest
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from atf_python.sys.net.netlink import NetlinkTestTemplate
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from atf_python.sys.net.netlink import NlConst
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from atf_python.sys.net.vnet import SingleVnetTestTemplate
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class TestNlCore(NetlinkTestTemplate, SingleVnetTestTemplate):
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@pytest.mark.parametrize(
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"params",
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[
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pytest.param({"type": socket.SOCK_RAW}, id="SOCK_RAW"),
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pytest.param({"type": socket.SOCK_DGRAM}, id="SOCK_DGRAM"),
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],
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)
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def test_socket_type(self, params):
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s = socket.socket(NlConst.AF_NETLINK, params["type"], NlConst.NETLINK_ROUTE)
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s.close()
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@pytest.mark.parametrize(
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"params",
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[
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pytest.param({"type": socket.SOCK_STREAM}, id="SOCK_STREAM"),
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pytest.param({"type": socket.SOCK_RDM}, id="SOCK_RDM"),
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pytest.param({"type": socket.SOCK_SEQPACKET}, id="SOCK_SEQPACKET"),
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],
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)
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def test_socket_type_unsup(self, params):
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with pytest.raises(OSError) as exc_info:
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socket.socket(NlConst.AF_NETLINK, params["type"], NlConst.NETLINK_ROUTE)
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assert exc_info.value.errno == errno.EPROTOTYPE
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