rtnl_addr: decode ifaddrmsg netlink attributes

* rtnl_addr.c (decode_ifa_address,
decode_ifa_cacheinfo, decode_ifa_flags): New functions.
(ifaddrmsg_nla_decoders): New array.
(decode_ifaddrmsg): Use it.

diff --git a/rtnl_addr.c b/rtnl_addr.c
index c7e37eab66315ccbf1ce46f71b361a509ac79254..a05cfbed974cbf4093dac7782691262bf3570e38 100644 (file)
--- a/rtnl_addr.c
+++ b/rtnl_addr.c
@@ -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);
        }
 }