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netlink: add decoding of NETLINK_NETFILTER message types

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* xlat/nl_netfilter_msg_types.in: New file.
* xlat/nl_netfilter_subsys_ids.in: Likewise.
* netlink.c: Include "xlat/nl_netfilter_msg_types.h"
and "xlat/nl_netfilter_subsys_ids.h".
(nlmsg_types): Add NETLINK_NETFILTER.
(decode_nlmsg_type): Handle NETLINK_NETFILTER.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
This commit is contained in:
Дмитрий Левин 2017-06-04 18:14:50 +00:00
parent d0231ef60b
commit 6706343b2d
3 changed files with 46 additions and 1 deletions
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32
netlink.c
View File

@ -37,6 +37,8 @@
#include "xlat/netlink_protocols.h"
#include "xlat/netlink_types.h"
#include "xlat/nl_audit_types.h"
#include "xlat/nl_netfilter_msg_types.h"
#include "xlat/nl_netfilter_subsys_ids.h"
#include "xlat/nl_route_types.h"
#include "xlat/nl_selinux_types.h"
#include "xlat/nl_sock_diag_types.h"
@ -101,6 +103,7 @@ static const struct {
const char *const dflt;
} nlmsg_types[] = {
[NETLINK_AUDIT] = { nl_audit_types, "AUDIT_???" },
[NETLINK_NETFILTER] = { nl_netfilter_subsys_ids, "NFNL_SUBSYS_???" },
[NETLINK_ROUTE] = { nl_route_types, "RTM_???" },
[NETLINK_SELINUX] = { nl_selinux_types, "SELNL_MSG_???" },
[NETLINK_SOCK_DIAG] = { nl_sock_diag_types, "SOCK_DIAG_???" },
@ -116,7 +119,34 @@ decode_nlmsg_type(const uint16_t type, const unsigned int family)
{
if (family < ARRAY_SIZE(nlmsg_types)
&& nlmsg_types[family].xlat) {
printxval(nlmsg_types[family].xlat, type, nlmsg_types[family].dflt);
if (family == NETLINK_NETFILTER) {
/* Reserved control nfnetlink messages first. */
const char *text = xlookup(nl_netfilter_msg_types,
type);
if (text) {
tprints(text);
return;
}
/*
* Other netfilter message types are split
* in two pieces: 8 bits subsystem and 8 bits type.
*/
const uint8_t subsys_id = (uint8_t) (type >> 8);
const uint8_t msg_type = (uint8_t) type;
printxval(nlmsg_types[family].xlat, subsys_id,
nlmsg_types[family].dflt);
/*
* The type is subsystem specific,
* print it in numeric format for now.
*/
tprintf("<<8|%#x", msg_type);
} else {
printxval(nlmsg_types[family].xlat, type,
nlmsg_types[family].dflt);
}
} else {
printxval(netlink_types, type, "NLMSG_???");
}

2
xlat/nl_netfilter_msg_types.in Normal file
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@ -0,0 +1,2 @@
NFNL_MSG_BATCH_BEGIN 0x10
NFNL_MSG_BATCH_END 0x11

13
xlat/nl_netfilter_subsys_ids.in Normal file
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@ -0,0 +1,13 @@
NFNL_SUBSYS_NONE 0
NFNL_SUBSYS_CTNETLINK 1
NFNL_SUBSYS_CTNETLINK_EXP 2
NFNL_SUBSYS_QUEUE 3
NFNL_SUBSYS_ULOG 4
NFNL_SUBSYS_OSF 5
NFNL_SUBSYS_IPSET 6
NFNL_SUBSYS_ACCT 7
NFNL_SUBSYS_CTNETLINK_TIMEOUT 8
NFNL_SUBSYS_CTHELPER 9
NFNL_SUBSYS_NFTABLES 10
NFNL_SUBSYS_NFT_COMPAT 11
NFNL_SUBSYS_COUNT 12