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netlink: add a basic netlink attribute parser of AF_INET diag

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* linux/inet_diag.h (INET_DIAG_REQ_*): New enum.
* netlink_sock_diag.c: Include "xlat/inet_diag_attrs.h"
and "xlat/inet_diag_req_attrs.h".
(decode_inet_diag_req_compat, decode_inet_diag_req_v2,
 decode_inet_diag_msg): Use decode_nlattr.
* xlat/inet_diag_attrs.in: New file.
* xlat/inet_diag_req_attrs.in: Likewise.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
This commit is contained in:
JingPiao Chen 2017-06-27 18:10:05 +08:00 committed by Dmitry V. Levin
parent 6cc89c0314
commit ab17493bb2
4 changed files with 58 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
linux/inet_diag.h
View File

@ -34,6 +34,11 @@ struct inet_diag_req_v2 {
struct inet_diag_sockid id;
};
enum {
INET_DIAG_REQ_NONE,
INET_DIAG_REQ_BYTECODE,
};
/* Info structure */
struct inet_diag_msg {
uint8_t idiag_family;

35
netlink_sock_diag.c
View File

@ -40,7 +40,9 @@
#endif
#include <linux/unix_diag.h>
#include "xlat/inet_diag_attrs.h"
#include "xlat/inet_diag_extended_flags.h"
#include "xlat/inet_diag_req_attrs.h"
#include "xlat/tcp_states.h"
#include "xlat/tcp_state_flags.h"
@ -327,7 +329,8 @@ decode_inet_diag_req_compat(struct tcb *const tcp,
const kernel_ulong_t len)
{
struct inet_diag_req req = { .idiag_family = family };
const size_t offset = sizeof(req.idiag_family);
size_t offset = sizeof(req.idiag_family);
bool decode_nla = false;
PRINT_FIELD_XVAL("{", req, idiag_family, addrfams, "AF_???");
tprints(", ");
@ -345,10 +348,18 @@ decode_inet_diag_req_compat(struct tcb *const tcp,
PRINT_FIELD_FLAGS(", ", req, idiag_states,
tcp_state_flags, "1<<TCP_???");
PRINT_FIELD_U(", ", req, idiag_dbs);
decode_nla = true;
}
} else
tprints("...");
tprints("}");
offset = NLA_ALIGN(sizeof(req));
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
inet_diag_req_attrs, "INET_DIAG_REQ_???");
}
}
static void
@ -359,7 +370,8 @@ decode_inet_diag_req_v2(struct tcb *const tcp,
const kernel_ulong_t len)
{
struct inet_diag_req_v2 req = { .sdiag_family = family };
const size_t offset = sizeof(req.sdiag_family);
size_t offset = sizeof(req.sdiag_family);
bool decode_nla = false;
PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
tprints(", ");
@ -376,10 +388,18 @@ decode_inet_diag_req_v2(struct tcb *const tcp,
tcp_state_flags, "1<<TCP_???");
tprints(", id=");
print_inet_diag_sockid(&req.id, req.sdiag_family);
decode_nla = true;
}
} else
tprints("...");
tprints("}");
offset = NLA_ALIGN(sizeof(req));
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
inet_diag_req_attrs, "INET_DIAG_REQ_???");
}
}
static void
@ -406,7 +426,8 @@ decode_inet_diag_msg(struct tcb *const tcp,
const kernel_ulong_t len)
{
struct inet_diag_msg msg = { .idiag_family = family };
const size_t offset = sizeof(msg.idiag_family);
size_t offset = sizeof(msg.idiag_family);
bool decode_nla = false;
PRINT_FIELD_XVAL("{", msg, idiag_family, addrfams, "AF_???");
tprints(", ");
@ -425,10 +446,18 @@ decode_inet_diag_msg(struct tcb *const tcp,
PRINT_FIELD_U(", ", msg, idiag_wqueue);
PRINT_FIELD_U(", ", msg, idiag_uid);
PRINT_FIELD_U(", ", msg, idiag_inode);
decode_nla = true;
}
} else
tprints("...");
tprints("}");
offset = NLA_ALIGN(sizeof(msg));
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
inet_diag_attrs, "INET_DIAG_???");
}
}
#ifdef AF_SMC

18
xlat/inet_diag_attrs.in Normal file
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@ -0,0 +1,18 @@
#unconditional
INET_DIAG_NONE
INET_DIAG_MEMINFO
INET_DIAG_INFO
INET_DIAG_VEGASINFO
INET_DIAG_CONG
INET_DIAG_TOS
INET_DIAG_TCLASS
INET_DIAG_SKMEMINFO
INET_DIAG_SHUTDOWN
INET_DIAG_DCTCPINFO
INET_DIAG_PROTOCOL
INET_DIAG_SKV6ONLY
INET_DIAG_LOCALS
INET_DIAG_PEERS
INET_DIAG_PAD
INET_DIAG_MARK
INET_DIAG_BBRINFO

3
xlat/inet_diag_req_attrs.in Normal file
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@ -0,0 +1,3 @@
#unconditional
INET_DIAG_REQ_NONE
INET_DIAG_REQ_BYTECODE