strace/rtnl_addr.c
Dmitry V. Levin daaf8ab7fe Update copyright headers
Headers updated automatically using maint/update_copyright_years.sh
script.
2018-02-13 22:00:00 +00:00

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) 2016-2018 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,
(char *) &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);
}
}