48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* lib/route/cls/ematch/container.c Container Ematch
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* Copyright (c) 2008-2013 Thomas Graf <tgraf@suug.ch>
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*/
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#include <netlink-private/netlink.h>
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#include <netlink-private/tc.h>
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#include <netlink/netlink.h>
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#include <netlink/route/cls/ematch.h>
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static int container_parse(struct rtnl_ematch *e, void *data, size_t len __attribute__((unused)))
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{
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/*
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The kernel may provide more than 4 bytes of data in the future and we want
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older libnl versions to be ok with that. We want interfaces to be growable
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so we only ever enforce a minimum data length and copy as much as we are
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aware of. Thomas Graf.
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*/
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memcpy(e->e_data, data, sizeof(uint32_t));
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return 0;
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}
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static int container_fill(struct rtnl_ematch *e, struct nl_msg *msg)
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{
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return nlmsg_append(msg, e->e_data, sizeof(uint32_t), 0);
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}
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static struct rtnl_ematch_ops container_ops = {
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.eo_kind = TCF_EM_CONTAINER,
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.eo_name = "container",
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.eo_minlen = sizeof(uint32_t),
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.eo_datalen = sizeof(uint32_t),
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.eo_parse = container_parse,
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.eo_fill = container_fill,
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};
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static void __init container_init(void)
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{
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rtnl_ematch_register(&container_ops);
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}
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