static bool
ipvs_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_ipvs_mtinfo *data = par->matchinfo;
struct netns_ipvs *ipvs = net_ipvs(par->net);
/* ipvs_mt_check ensures that family is only NFPROTO_IPV[46]. */
const u_int8_t family = par->family;
struct ip_vs_iphdr iph;
struct ip_vs_protocol *pp;
struct ip_vs_conn *cp;
bool match = true;
if (data->bitmask == XT_IPVS_IPVS_PROPERTY) {
match = skb->ipvs_property ^
!!(data->invert & XT_IPVS_IPVS_PROPERTY);
goto out;
}
/* other flags than XT_IPVS_IPVS_PROPERTY are set */
if (!skb->ipvs_property) {
match = false;
goto out;
}
ip_vs_fill_iph_skb(family, skb, true, &iph);
if (data->bitmask & XT_IPVS_PROTO)
if ((iph.protocol == data->l4proto) ^
!(data->invert & XT_IPVS_PROTO)) {
match = false;
goto out;
}
pp = ip_vs_proto_get(iph.protocol);
if (unlikely(!pp)) {
match = false;
goto out;
}
/*
* Check if the packet belongs to an existing entry
*/
cp = pp->conn_out_get(ipvs, family, skb, &iph);
if (unlikely(cp == NULL)) {
match = false;
goto out;
}
/*
* We found a connection, i.e. ct != 0, make sure to call
* __ip_vs_conn_put before returning. In our case jump to out_put_con.
*/
if (data->bitmask & XT_IPVS_VPORT)
if ((cp->vport == data->vport) ^
!(data->invert & XT_IPVS_VPORT)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_VPORTCTL)
if ((cp->control != NULL &&
cp->control->vport == data->vportctl) ^
!(data->invert & XT_IPVS_VPORTCTL)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_DIR) {
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL || nf_ct_is_untracked(ct)) {
match = false;
goto out_put_cp;
}
if ((ctinfo >= IP_CT_IS_REPLY) ^
!!(data->invert & XT_IPVS_DIR)) {
match = false;
goto out_put_cp;
}
}
if (data->bitmask & XT_IPVS_METHOD)
if (((cp->flags & IP_VS_CONN_F_FWD_MASK) == data->fwd_method) ^
!(data->invert & XT_IPVS_METHOD)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_VADDR) {
if (ipvs_mt_addrcmp(&cp->vaddr, &data->vaddr,
&data->vmask, family) ^
!(data->invert & XT_IPVS_VADDR)) {
match = false;
goto out_put_cp;
}
}
out_put_cp:
__ip_vs_conn_put(cp);
out:
pr_debug("match=%d\n", match);
return match;
}
static bool
ipvs_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_ipvs_mtinfo *data = par->matchinfo;
/* */
const u_int8_t family = par->family;
struct ip_vs_iphdr iph;
struct ip_vs_protocol *pp;
struct ip_vs_conn *cp;
bool match = true;
if (data->bitmask == XT_IPVS_IPVS_PROPERTY) {
match = skb->ipvs_property ^
!!(data->invert & XT_IPVS_IPVS_PROPERTY);
goto out;
}
/* */
if (!skb->ipvs_property) {
match = false;
goto out;
}
ip_vs_fill_iphdr(family, skb_network_header(skb), &iph);
if (data->bitmask & XT_IPVS_PROTO)
if ((iph.protocol == data->l4proto) ^
!(data->invert & XT_IPVS_PROTO)) {
match = false;
goto out;
}
pp = ip_vs_proto_get(iph.protocol);
if (unlikely(!pp)) {
match = false;
goto out;
}
/*
*/
cp = pp->conn_out_get(family, skb, &iph, iph.len, 1 /* */);
if (unlikely(cp == NULL)) {
match = false;
goto out;
}
/*
*/
if (data->bitmask & XT_IPVS_VPORT)
if ((cp->vport == data->vport) ^
!(data->invert & XT_IPVS_VPORT)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_VPORTCTL)
if ((cp->control != NULL &&
cp->control->vport == data->vportctl) ^
!(data->invert & XT_IPVS_VPORTCTL)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_DIR) {
enum ip_conntrack_info ctinfo;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL || nf_ct_is_untracked(ct)) {
match = false;
goto out_put_cp;
}
if ((ctinfo >= IP_CT_IS_REPLY) ^
!!(data->invert & XT_IPVS_DIR)) {
match = false;
goto out_put_cp;
}
}
if (data->bitmask & XT_IPVS_METHOD)
if (((cp->flags & IP_VS_CONN_F_FWD_MASK) == data->fwd_method) ^
!(data->invert & XT_IPVS_METHOD)) {
match = false;
goto out_put_cp;
}
if (data->bitmask & XT_IPVS_VADDR) {
if (ipvs_mt_addrcmp(&cp->vaddr, &data->vaddr,
&data->vmask, family) ^
!(data->invert & XT_IPVS_VADDR)) {
match = false;
goto out_put_cp;
}
}
out_put_cp:
__ip_vs_conn_put(cp);
out:
pr_debug("match=%d\n", match);
return match;
}
