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netfilter: conntrack: remove invert_tuple callback

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Only used by icmp(v6).  Prefer a direct call and remove this
function from the l4proto struct.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-01-15 22:03:38 +01:00 committed by Pablo Neira Ayuso
parent df5e162908
commit 197c4300ae
4 changed files with 15 additions and 14 deletions
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11
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -27,12 +27,6 @@ struct nf_conntrack_l4proto {
/* protoinfo nlattr size, closes a hole */
u16 nlattr_size;
/* Invert the per-proto part of the tuple: ie. turn xmit into reply.
* Only used by icmp, most protocols use a generic version.
*/
bool (*invert_tuple)(struct nf_conntrack_tuple *inverse,
const struct nf_conntrack_tuple *orig);
/* Returns verdict for packet, or -1 for invalid. */
int (*packet)(struct nf_conn *ct,
struct sk_buff *skb,
@ -95,6 +89,11 @@ bool icmpv6_pkt_to_tuple(const struct sk_buff *skb,
struct net *net,
struct nf_conntrack_tuple *tuple);
bool nf_conntrack_invert_icmp_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig);
bool nf_conntrack_invert_icmpv6_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig);
int nf_conntrack_icmpv4_error(struct nf_conn *tmpl,
struct sk_buff *skb,
unsigned int dataoff,

8
net/netfilter/nf_conntrack_core.c
View File

@ -423,8 +423,12 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
inverse->dst.protonum = orig->dst.protonum;
if (unlikely(l4proto->invert_tuple))
return l4proto->invert_tuple(inverse, orig);
switch (orig->dst.protonum) {
case IPPROTO_ICMP:
return nf_conntrack_invert_icmp_tuple(inverse, orig);
case IPPROTO_ICMPV6:
return nf_conntrack_invert_icmpv6_tuple(inverse, orig);
}
inverse->src.u.all = orig->dst.u.all;
inverse->dst.u.all = orig->src.u.all;

5
net/netfilter/nf_conntrack_proto_icmp.c
View File

@ -54,8 +54,8 @@ static const u_int8_t invmap[] = {
[ICMP_ADDRESSREPLY] = ICMP_ADDRESS + 1
};
static bool icmp_invert_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
bool nf_conntrack_invert_icmp_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
{
if (orig->dst.u.icmp.type >= sizeof(invmap) ||
!invmap[orig->dst.u.icmp.type])
@ -347,7 +347,6 @@ static struct nf_proto_net *icmp_get_net_proto(struct net *net)
const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp =
{
.l4proto = IPPROTO_ICMP,
.invert_tuple = icmp_invert_tuple,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
.tuple_to_nlattr = icmp_tuple_to_nlattr,
.nlattr_tuple_size = icmp_nlattr_tuple_size,

5
net/netfilter/nf_conntrack_proto_icmpv6.c
View File

@ -67,8 +67,8 @@ static const u_int8_t noct_valid_new[] = {
[ICMPV6_MLD2_REPORT - 130] = 1
};
static bool icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
bool nf_conntrack_invert_icmpv6_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
{
int type = orig->dst.u.icmp.type - 128;
if (type < 0 || type >= sizeof(invmap) || !invmap[type])
@ -358,7 +358,6 @@ static struct nf_proto_net *icmpv6_get_net_proto(struct net *net)
const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
{
.l4proto = IPPROTO_ICMPV6,
.invert_tuple = icmpv6_invert_tuple,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
.tuple_to_nlattr = icmpv6_tuple_to_nlattr,
.nlattr_tuple_size = icmpv6_nlattr_tuple_size,