f076c78667
* rtnl_addr.c (decode_ifa_address, decode_ifa_cacheinfo, decode_ifa_flags): New functions. (ifaddrmsg_nla_decoders): New array. (decode_ifaddrmsg): Use it.
140 lines
4.2 KiB
C
140 lines
4.2 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 "nlattr.h"
|
|
#include "print_fields.h"
|
|
|
|
#include "netlink.h"
|
|
#include <linux/rtnetlink.h>
|
|
#ifdef HAVE_LINUX_IF_ADDR_H
|
|
# include <linux/if_addr.h>
|
|
#endif
|
|
|
|
#include "xlat/ifaddrflags.h"
|
|
#include "xlat/routing_scopes.h"
|
|
#include "xlat/rtnl_addr_attrs.h"
|
|
|
|
static bool
|
|
decode_ifa_address(struct tcb *const tcp,
|
|
const kernel_ulong_t addr,
|
|
const unsigned int len,
|
|
const void *const opaque_data)
|
|
{
|
|
const struct ifaddrmsg *const ifaddr = opaque_data;
|
|
|
|
decode_inet_addr(tcp, addr, len, ifaddr->ifa_family, NULL);
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
decode_ifa_cacheinfo(struct tcb *const tcp,
|
|
const kernel_ulong_t addr,
|
|
const unsigned int len,
|
|
const void *const opaque_data)
|
|
{
|
|
struct ifa_cacheinfo ci;
|
|
|
|
if (len < sizeof(ci))
|
|
return false;
|
|
else if (!umove_or_printaddr(tcp, addr, &ci)) {
|
|
PRINT_FIELD_U("{", ci, ifa_prefered);
|
|
PRINT_FIELD_U(", ", ci, ifa_valid);
|
|
PRINT_FIELD_U(", ", ci, cstamp);
|
|
PRINT_FIELD_U(", ", ci, tstamp);
|
|
tprintf("}");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
decode_ifa_flags(struct tcb *const tcp,
|
|
const kernel_ulong_t addr,
|
|
const unsigned int len,
|
|
const void *const opaque_data)
|
|
{
|
|
uint32_t ifa_flags;
|
|
|
|
if (len < sizeof(ifa_flags))
|
|
return false;
|
|
else if (!umove_or_printaddr(tcp, addr, &ifa_flags))
|
|
printflags(ifaddrflags, ifa_flags, "IFA_F_???");
|
|
|
|
return true;
|
|
}
|
|
|
|
static const nla_decoder_t ifaddrmsg_nla_decoders[] = {
|
|
[IFA_ADDRESS] = decode_ifa_address,
|
|
[IFA_LOCAL] = decode_ifa_address,
|
|
[IFA_LABEL] = decode_nla_str,
|
|
[IFA_BROADCAST] = decode_ifa_address,
|
|
[IFA_ANYCAST] = decode_ifa_address,
|
|
[IFA_CACHEINFO] = decode_ifa_cacheinfo,
|
|
[IFA_MULTICAST] = decode_ifa_address,
|
|
[IFA_FLAGS] = decode_ifa_flags
|
|
};
|
|
|
|
DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg)
|
|
{
|
|
struct ifaddrmsg ifaddr = { .ifa_family = family };
|
|
size_t offset = sizeof(ifaddr.ifa_family);
|
|
bool decode_nla = false;
|
|
|
|
PRINT_FIELD_XVAL("{", ifaddr, ifa_family, addrfams, "AF_???");
|
|
|
|
tprints(", ");
|
|
if (len >= sizeof(ifaddr)) {
|
|
if (!umoven_or_printaddr(tcp, addr + offset,
|
|
sizeof(ifaddr) - offset,
|
|
(void *) &ifaddr + offset)) {
|
|
PRINT_FIELD_U("", ifaddr, ifa_prefixlen);
|
|
PRINT_FIELD_FLAGS(", ", ifaddr, ifa_flags,
|
|
ifaddrflags, "IFA_F_???");
|
|
PRINT_FIELD_XVAL(", ", ifaddr, ifa_scope,
|
|
routing_scopes, NULL);
|
|
PRINT_FIELD_IFINDEX(", ", ifaddr, ifa_index);
|
|
decode_nla = true;
|
|
}
|
|
} else
|
|
tprints("...");
|
|
tprints("}");
|
|
|
|
offset = NLMSG_ALIGN(sizeof(ifaddr));
|
|
if (decode_nla && len > offset) {
|
|
tprints(", ");
|
|
decode_nlattr(tcp, addr + offset, len - offset,
|
|
rtnl_addr_attrs, "IFA_???",
|
|
ifaddrmsg_nla_decoders,
|
|
ARRAY_SIZE(ifaddrmsg_nla_decoders), &ifaddr);
|
|
}
|
|
}
|