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netlink: add a basic rtnetlink parser of route messages

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* defs.h (routing_scopes): New xlat prototype.
* rtnl_route.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* netlink_route.h (decode_rtmsg): New prototype.
* netlink_route.c (route_decoders): Add RTM_DELROUTE, RTM_GETROUTE,
and RTM_NEWROUTE.
* xlat/ip_type_of_services.in: New file.
* xlat/routing_flags.in: Likewise.
* xlat/routing_protocols.in: Likewise.
* xlat/routing_table_ids.in: Likewise.
* xlat/routing_types.in: Likewise.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
This commit is contained in:
JingPiao Chen 2017-08-13 10:22:21 +08:00 committed by Dmitry V. Levin
parent 0a3ebb0443
commit 0ca787b5ba
10 changed files with 124 additions and 1 deletions
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1
Makefile.am
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@ -249,6 +249,7 @@ strace_SOURCES = \
rtc.c \
rtnl_addr.c \
rtnl_link.c \
rtnl_route.c \
sched.c \
sched_attr.h \
scsi.c \

1
defs.h
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@ -298,6 +298,7 @@ extern const struct xlat nl_route_types[];
extern const struct xlat open_access_modes[];
extern const struct xlat open_mode_flags[];
extern const struct xlat resource_flags[];
extern const struct xlat routing_scopes[];
extern const struct xlat setns_types[];
extern const struct xlat sg_io_info[];
extern const struct xlat socketlayers[];

6
netlink_route.c
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@ -61,7 +61,11 @@ static const netlink_route_decoder_t route_decoders[] = {
[RTM_GETADDR - RTM_BASE] = decode_ifaddrmsg,
[RTM_GETANYCAST - RTM_BASE] = decode_ifaddrmsg,
[RTM_GETMULTICAST - RTM_BASE] = decode_ifaddrmsg,
[RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg
[RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg,
[RTM_DELROUTE - RTM_BASE] = decode_rtmsg,
[RTM_GETROUTE - RTM_BASE] = decode_rtmsg,
[RTM_NEWROUTE - RTM_BASE] = decode_rtmsg
};
bool

1
netlink_route.h
View File

@ -41,5 +41,6 @@ route_decode_name(struct tcb *tcp, \
extern DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_ifinfomsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_rtmsg);
#endif /* !STRACE_NETLINK_ROUTE_H */

74
rtnl_route.c Normal file
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@ -0,0 +1,74 @@
/*
* 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 <linux/ip.h>
#include "netlink.h"
#include <linux/rtnetlink.h>
#include "xlat/ip_type_of_services.h"
#include "xlat/routing_flags.h"
#include "xlat/routing_protocols.h"
#include "xlat/routing_table_ids.h"
#include "xlat/routing_types.h"
DECL_NETLINK_ROUTE_DECODER(decode_rtmsg)
{
struct rtmsg rtmsg = { .rtm_family = family };
const size_t offset = sizeof(rtmsg.rtm_family);
PRINT_FIELD_XVAL("{", rtmsg, rtm_family, addrfams, "AF_???");
tprints(", ");
if (len >= sizeof(rtmsg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(rtmsg) - offset,
(void *) &rtmsg + offset)) {
PRINT_FIELD_U("", rtmsg, rtm_dst_len);
PRINT_FIELD_U(", ", rtmsg, rtm_src_len);
PRINT_FIELD_FLAGS(", ", rtmsg, rtm_tos,
ip_type_of_services, "IPTOS_TOS_???");
PRINT_FIELD_XVAL(", ", rtmsg, rtm_table,
routing_table_ids, NULL);
PRINT_FIELD_XVAL(", ", rtmsg, rtm_protocol,
routing_protocols, "RTPROT_???");
PRINT_FIELD_XVAL(", ", rtmsg, rtm_scope,
routing_scopes, NULL);
PRINT_FIELD_XVAL(", ", rtmsg, rtm_type,
routing_types, "RTN_???");
PRINT_FIELD_FLAGS(", ", rtmsg, rtm_flags,
routing_flags, "RTM_F_???");
}
} else
tprints("...");
tprints("}");
}

4
xlat/ip_type_of_services.in Normal file
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@ -0,0 +1,4 @@
IPTOS_LOWDELAY
IPTOS_THROUGHPUT
IPTOS_RELIABILITY
IPTOS_MINCOST

5
xlat/routing_flags.in Normal file
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@ -0,0 +1,5 @@
RTM_F_NOTIFY
RTM_F_CLONED
RTM_F_EQUALIZE
RTM_F_PREFIX
RTM_F_LOOKUP_TABLE

16
xlat/routing_protocols.in Normal file
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@ -0,0 +1,16 @@
RTPROT_UNSPEC
RTPROT_REDIRECT
RTPROT_KERNEL
RTPROT_BOOT
RTPROT_STATIC
RTPROT_GATED
RTPROT_RA
RTPROT_MRT
RTPROT_ZEBRA
RTPROT_BIRD
RTPROT_DNROUTED
RTPROT_XORP
RTPROT_NTK
RTPROT_DHCP
RTPROT_MROUTED
RTPROT_BABEL

5
xlat/routing_table_ids.in Normal file
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@ -0,0 +1,5 @@
RT_TABLE_UNSPEC 0
RT_TABLE_COMPAT 252
RT_TABLE_DEFAULT 253
RT_TABLE_MAIN 254
RT_TABLE_LOCAL 255

12
xlat/routing_types.in Normal file
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@ -0,0 +1,12 @@
RTN_UNSPEC 0
RTN_UNICAST 1
RTN_LOCAL 2
RTN_BROADCAST 3
RTN_ANYCAST 4
RTN_MULTICAST 5
RTN_BLACKHOLE 6
RTN_UNREACHABLE 7
RTN_PROHIBIT 8
RTN_THROW 9
RTN_NAT 10
RTN_XRESOLVE 11