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netlink: add a basic rtnetlink parser of tc messages

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* rtnl_tc.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* netlink_route.h (decode_tcmsg): New prototype.
* netlink_route.c (route_decoders): Add RTM_DELQDISC,
RTM_GETQDISC, RTM_NEWQDISC, RTM_DELTCLASS, RTM_GETTCLASS,
RTM_NEWTCLASS, RTM_DELTFILTER, RTM_GETTFILTER, and RTM_NEWTFILTER.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
This commit is contained in:
JingPiao Chen 2017-08-13 10:22:29 +08:00 committed by Dmitry V. Levin
parent e87297d102
commit 88f9942407
4 changed files with 70 additions and 1 deletions
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1
Makefile.am
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@ -253,6 +253,7 @@ strace_SOURCES = \
rtnl_neightbl.c \
rtnl_route.c \
rtnl_rule.c \
rtnl_tc.c \
sched.c \
sched_attr.h \
scsi.c \

12
netlink_route.c
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@ -77,7 +77,17 @@ static const netlink_route_decoder_t route_decoders[] = {
[RTM_GETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
[RTM_NEWNEIGHTBL - RTM_BASE] = decode_ndtmsg,
[RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg
[RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
[RTM_DELQDISC - RTM_BASE] = decode_tcmsg,
[RTM_GETQDISC - RTM_BASE] = decode_tcmsg,
[RTM_NEWQDISC - RTM_BASE] = decode_tcmsg,
[RTM_DELTCLASS - RTM_BASE] = decode_tcmsg,
[RTM_GETTCLASS - RTM_BASE] = decode_tcmsg,
[RTM_NEWTCLASS - RTM_BASE] = decode_tcmsg,
[RTM_DELTFILTER - RTM_BASE] = decode_tcmsg,
[RTM_GETTFILTER - RTM_BASE] = decode_tcmsg,
[RTM_NEWTFILTER - RTM_BASE] = decode_tcmsg
};
bool

1
netlink_route.h
View File

@ -46,5 +46,6 @@ extern DECL_NETLINK_ROUTE_DECODER(decode_ndmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_ndtmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_rtm_getneigh);
extern DECL_NETLINK_ROUTE_DECODER(decode_rtmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_tcmsg);
#endif /* !STRACE_NETLINK_ROUTE_H */

57
rtnl_tc.c Normal file
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@ -0,0 +1,57 @@
/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2016-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include "netlink_route.h"
#include "print_fields.h"
#include "netlink.h"
#include <linux/rtnetlink.h>
DECL_NETLINK_ROUTE_DECODER(decode_tcmsg)
{
struct tcmsg tcmsg = { .tcm_family = family };
const size_t offset = sizeof(tcmsg.tcm_family);
PRINT_FIELD_XVAL("{", tcmsg, tcm_family, addrfams, "AF_???");
tprints(", ");
if (len >= sizeof(tcmsg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(tcmsg) - offset,
(void *) &tcmsg + offset)) {
PRINT_FIELD_IFINDEX("", tcmsg, tcm_ifindex);
PRINT_FIELD_U(", ", tcmsg, tcm_handle);
PRINT_FIELD_U(", ", tcmsg, tcm_parent);
PRINT_FIELD_U(", ", tcmsg, tcm_info);
}
} else
tprints("...");
tprints("}");
}