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author | JingPiao Chen <chenjingpiao@gmail.com> | 2017-08-28 00:46:22 +0800 |
---|---|---|
committer | JingPiao Chen <chenjingpiao@gmail.com> | 2017-08-29 15:23:36 +0800 |
commit | 19abd528fbba0a64764e647b7bcd57408259b6f5 (patch) | |
tree | 97e1f877b02bb1f43e53c739f91ccf9eb7516cce | |
parent | 65ad4f2cce08b32918832214101bc606910db011 (diff) | |
download | strace-19abd528fbba0a64764e647b7bcd57408259b6f5.tar.gz |
rtnl_neigh: decode ndmsg netlink attributes
* nlattr.c: Include <netinet/in.h> and <arpa/inet.h>.
(decode_nla_be16): New function.
* nlattr.h (decode_nla_be16): New prototype.
* rtnl_neigh.c (decode_neigh_addr,
decode_nda_cacheinfo): New functions.
(ndmsg_nla_decoders): New array.
(decode_ndmsg): Use it.
-rw-r--r-- | nlattr.c | 18 | ||||
-rw-r--r-- | nlattr.h | 1 | ||||
-rw-r--r-- | rtnl_neigh.c | 52 |
3 files changed, 70 insertions, 1 deletions
@@ -31,6 +31,8 @@ #include <endian.h> #include "netlink.h" #include "nlattr.h" +#include <netinet/in.h> +#include <arpa/inet.h> #include <linux/sock_diag.h> static bool @@ -222,6 +224,22 @@ decode_nla_ifindex(struct tcb *const tcp, } bool +decode_nla_be16(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + uint16_t num; + + if (len < sizeof(num)) + return false; + else if (!umove_or_printaddr(tcp, addr, &num)) + tprintf("htons(%u)", ntohs(num)); + + return true; +} + +bool decode_nla_be64(struct tcb *const tcp, const kernel_ulong_t addr, const unsigned int len, @@ -56,6 +56,7 @@ DECL_NLA(s8); DECL_NLA(s16); DECL_NLA(s32); DECL_NLA(s64); +DECL_NLA(be16); DECL_NLA(be64); DECL_NLA(str); DECL_NLA(strn); diff --git a/rtnl_neigh.c b/rtnl_neigh.c index 7191ecbab..0eaadc593 100644 --- a/rtnl_neigh.c +++ b/rtnl_neigh.c @@ -42,6 +42,54 @@ #include "xlat/neighbor_cache_entry_states.h" #include "xlat/rtnl_neigh_attrs.h" +static bool +decode_neigh_addr(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + const struct ndmsg *const ndmsg = opaque_data; + + decode_inet_addr(tcp, addr, len, ndmsg->ndm_family, NULL); + + return true; +} + +static bool +decode_nda_cacheinfo(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + struct nda_cacheinfo ci; + + if (len < sizeof(ci)) + return false; + else if (!umove_or_printaddr(tcp, addr, &ci)) { + PRINT_FIELD_U("{", ci, ndm_confirmed); + PRINT_FIELD_U(", ", ci, ndm_used); + PRINT_FIELD_U(", ", ci, ndm_updated); + PRINT_FIELD_U(", ", ci, ndm_refcnt); + tprints("}"); + } + + return true; +} + +static const nla_decoder_t ndmsg_nla_decoders[] = { + [NDA_DST] = decode_neigh_addr, + [NDA_LLADDR] = decode_neigh_addr, + [NDA_CACHEINFO] = decode_nda_cacheinfo, + [NDA_PROBES] = decode_nla_u32, + [NDA_VLAN] = decode_nla_u16, + [NDA_PORT] = decode_nla_be16, + [NDA_VNI] = decode_nla_u32, + [NDA_IFINDEX] = decode_nla_ifindex, + [NDA_MASTER] = decode_nla_ifindex, + [NDA_LINK_NETNSID] = decode_nla_u32, + [NDA_SRC_VNI] = NULL, +}; + DECL_NETLINK_ROUTE_DECODER(decode_ndmsg) { struct ndmsg ndmsg = { .ndm_family = family }; @@ -74,7 +122,9 @@ DECL_NETLINK_ROUTE_DECODER(decode_ndmsg) if (decode_nla && len > offset) { tprints(", "); decode_nlattr(tcp, addr + offset, len - offset, - rtnl_neigh_attrs, "NDA_???", NULL, 0, NULL); + rtnl_neigh_attrs, "NDA_???", + ndmsg_nla_decoders, + ARRAY_SIZE(ndmsg_nla_decoders), &ndmsg); } } |