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rtnl_addr: decode ifaddrmsg netlink attributes

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* rtnl_addr.c (decode_ifa_address,
decode_ifa_cacheinfo, decode_ifa_flags): New functions.
(ifaddrmsg_nla_decoders): New array.
(decode_ifaddrmsg): Use it.
This commit is contained in:
JingPiao Chen 2017-08-22 14:45:48 +08:00 committed by Dmitry V. Levin
parent 89cab1f000
commit f076c78667
1 changed files with 64 additions and 1 deletions
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65
rtnl_addr.c
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@ -42,6 +42,67 @@
#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 };
@ -71,6 +132,8 @@ DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg)
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
rtnl_addr_attrs, "IFA_???", NULL, 0, NULL);
rtnl_addr_attrs, "IFA_???",
ifaddrmsg_nla_decoders,
ARRAY_SIZE(ifaddrmsg_nla_decoders), &ifaddr);
}
}