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netlink: introduce family specific decoder of NETLINK_ROUTE

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* netlink_route.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* defs.h (decode_netlink_route): New prototype.
* netlink.c (netlink_decoders): Add NETLINK_ROUTE.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
This commit is contained in:
JingPiao Chen 2017-06-16 20:49:15 +08:00
parent 474031e41b
commit 670390ac71
4 changed files with 65 additions and 0 deletions
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1
Makefile.am
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@ -193,6 +193,7 @@ strace_SOURCES = \
netlink_inet_diag.c \
netlink_netlink_diag.c \
netlink_packet_diag.c \
netlink_route.c \
netlink_selinux.c \
netlink_smc_diag.c \
netlink_sock_diag.c \

1
defs.h
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@ -697,6 +697,7 @@ decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
/* End of DECL_NETLINK definition. */
DECL_NETLINK(crypto);
DECL_NETLINK(route);
DECL_NETLINK(selinux);
DECL_NETLINK(sock_diag);

1
netlink.c
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@ -372,6 +372,7 @@ static const netlink_decoder_t netlink_decoders[] = {
#ifdef HAVE_LINUX_CRYPTOUSER_H
[NETLINK_CRYPTO] = decode_netlink_crypto,
#endif
[NETLINK_ROUTE] = decode_netlink_route,
[NETLINK_SELINUX] = decode_netlink_selinux,
[NETLINK_SOCK_DIAG] = decode_netlink_sock_diag
};

62
netlink_route.c Normal file
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@ -0,0 +1,62 @@
/*
* 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.h"
static void
decode_family(struct tcb *const tcp, const uint8_t family,
const kernel_ulong_t addr, const unsigned int len)
{
tprints("{family=");
printxval(addrfams, family, "AF_???");
if (len > sizeof(family)) {
tprints(", ");
printstr_ex(tcp, addr + sizeof(family),
len - sizeof(family), QUOTE_FORCE_HEX);
}
tprints("}");
}
bool
decode_netlink_route(struct tcb *const tcp,
const struct nlmsghdr *const nlmsghdr,
const kernel_ulong_t addr,
const unsigned int len)
{
uint8_t family;
if (nlmsghdr->nlmsg_type == NLMSG_DONE)
return false;
if (!umove_or_printaddr(tcp, addr, &family))
decode_family(tcp, family, addr, len);
return true;
}