strace/rtnl_rule.c
JingPiao Chen a0d3f258d0 netlink: add a basic rtnetlink parser of rule messages
* defs.h (routing_table_ids): New xlat prototype.
* rtnl_rule.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* defs.h (ip_type_of_services, routing_table_ids): New xlat prototypes.
* netlink_route.h (decode_fib_rule_hdr): New prototype.
* configure.ac (AC_CHECK_HEADERS): Add linux/fib_rules.h.
* netlink_route.c (route_decoders): Add RTM_DELRULE, RTM_GETRULE,
and RTM_NEWRULE.
* xlat/fib_rule_actions.in: New file.
* xlat/fib_rule_flags.in: Likewise.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
2017-08-14 01:06:59 +00:00

79 lines
2.8 KiB
C

/*
* 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>
#ifdef HAVE_LINUX_FIB_RULES_H
# include <linux/fib_rules.h>
#endif
#include "xlat/fib_rule_actions.h"
#include "xlat/fib_rule_flags.h"
DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr)
{
/*
* struct rtmsg and struct fib_rule_hdr are essentially
* the same structure, use struct rtmsg but treat it as
* struct fib_rule_hdr.
*/
struct rtmsg msg = { .rtm_family = family };
const size_t offset = sizeof(msg.rtm_family);
tprints("{family=");
printxval(addrfams, msg.rtm_family, "AF_???");
tprints(", ");
if (len >= sizeof(msg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(msg) - offset,
(void *) &msg + offset)) {
tprintf("dst_len=%u, src_len=%u",
msg.rtm_dst_len, msg.rtm_src_len);
tprints(", tos=");
printflags(ip_type_of_services, msg.rtm_tos,
"IPTOS_TOS_???");
tprints(", table=");
printxval(routing_table_ids, msg.rtm_table, NULL);
tprints(", action=");
printxval(fib_rule_actions, msg.rtm_type, "FR_ACT_???");
tprints(", flags=");
printflags(fib_rule_flags, msg.rtm_flags,
"FIB_RULE_???");
}
} else
tprints("...");
tprints("}");
}