These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / net / ipv4 / netfilter / ipt_SYNPROXY.c

diff --git a/kernel/net/ipv4/netfilter/ipt_SYNPROXY.c b/kernel/net/ipv4/netfilter/ipt_SYNPROXY.c
index e9e6779..5fdc556 100644 (file)
--- a/kernel/net/ipv4/netfilter/ipt_SYNPROXY.c
+++ b/kernel/net/ipv4/netfilter/ipt_SYNPROXY.c
@@ -18,7 +18,7 @@
 #include <net/netfilter/nf_conntrack_synproxy.h>
 
 static struct iphdr *
-synproxy_build_ip(struct sk_buff *skb, u32 saddr, u32 daddr)
+synproxy_build_ip(struct sk_buff *skb, __be32 saddr, __be32 daddr)
 {
        struct iphdr *iph;
 
@@ -39,11 +39,14 @@ synproxy_build_ip(struct sk_buff *skb, u32 saddr, u32 daddr)
 }
 
 static void
-synproxy_send_tcp(const struct sk_buff *skb, struct sk_buff *nskb,
+synproxy_send_tcp(const struct synproxy_net *snet,
+                 const struct sk_buff *skb, struct sk_buff *nskb,
                  struct nf_conntrack *nfct, enum ip_conntrack_info ctinfo,
                  struct iphdr *niph, struct tcphdr *nth,
                  unsigned int tcp_hdr_size)
 {
+       struct net *net = nf_ct_net(snet->tmpl);
+
        nth->check = ~tcp_v4_check(tcp_hdr_size, niph->saddr, niph->daddr, 0);
        nskb->ip_summed   = CHECKSUM_PARTIAL;
        nskb->csum_start  = (unsigned char *)nth - nskb->head;
@@ -51,7 +54,7 @@ synproxy_send_tcp(const struct sk_buff *skb, struct sk_buff *nskb,
 
        skb_dst_set_noref(nskb, skb_dst(skb));
        nskb->protocol = htons(ETH_P_IP);
-       if (ip_route_me_harder(nskb, RTN_UNSPEC))
+       if (ip_route_me_harder(net, nskb, RTN_UNSPEC))
                goto free_nskb;
 
        if (nfct) {
@@ -60,7 +63,7 @@ synproxy_send_tcp(const struct sk_buff *skb, struct sk_buff *nskb,
                nf_conntrack_get(nfct);
        }
 
-       ip_local_out(nskb);
+       ip_local_out(net, nskb->sk, nskb);
        return;
 
 free_nskb:
@@ -68,7 +71,8 @@ free_nskb:
 }
 
 static void
-synproxy_send_client_synack(const struct sk_buff *skb, const struct tcphdr *th,
+synproxy_send_client_synack(const struct synproxy_net *snet,
+                           const struct sk_buff *skb, const struct tcphdr *th,
                            const struct synproxy_options *opts)
 {
        struct sk_buff *nskb;
@@ -104,7 +108,7 @@ synproxy_send_client_synack(const struct sk_buff *skb, const struct tcphdr *th,
 
        synproxy_build_options(nth, opts);
 
-       synproxy_send_tcp(skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
+       synproxy_send_tcp(snet, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
                          niph, nth, tcp_hdr_size);
 }
 
@@ -148,7 +152,7 @@ synproxy_send_server_syn(const struct synproxy_net *snet,
 
        synproxy_build_options(nth, opts);
 
-       synproxy_send_tcp(skb, nskb, &snet->tmpl->ct_general, IP_CT_NEW,
+       synproxy_send_tcp(snet, skb, nskb, &snet->tmpl->ct_general, IP_CT_NEW,
                          niph, nth, tcp_hdr_size);
 }
 
@@ -188,7 +192,7 @@ synproxy_send_server_ack(const struct synproxy_net *snet,
 
        synproxy_build_options(nth, opts);
 
-       synproxy_send_tcp(skb, nskb, NULL, 0, niph, nth, tcp_hdr_size);
+       synproxy_send_tcp(snet, skb, nskb, NULL, 0, niph, nth, tcp_hdr_size);
 }
 
 static void
@@ -220,13 +224,14 @@ synproxy_send_client_ack(const struct synproxy_net *snet,
        nth->ack_seq    = th->ack_seq;
        tcp_flag_word(nth) = TCP_FLAG_ACK;
        nth->doff       = tcp_hdr_size / 4;
-       nth->window     = ntohs(htons(th->window) >> opts->wscale);
+       nth->window     = htons(ntohs(th->window) >> opts->wscale);
        nth->check      = 0;
        nth->urg_ptr    = 0;
 
        synproxy_build_options(nth, opts);
 
-       synproxy_send_tcp(skb, nskb, NULL, 0, niph, nth, tcp_hdr_size);
+       synproxy_send_tcp(snet, skb, nskb, skb->nfct, IP_CT_ESTABLISHED_REPLY,
+                         niph, nth, tcp_hdr_size);
 }
 
 static bool
@@ -257,7 +262,7 @@ static unsigned int
 synproxy_tg4(struct sk_buff *skb, const struct xt_action_param *par)
 {
        const struct xt_synproxy_info *info = par->targinfo;
-       struct synproxy_net *snet = synproxy_pernet(dev_net(par->in));
+       struct synproxy_net *snet = synproxy_pernet(par->net);
        struct synproxy_options opts = {};
        struct tcphdr *th, _th;
 
@@ -286,7 +291,7 @@ synproxy_tg4(struct sk_buff *skb, const struct xt_action_param *par)
                                          XT_SYNPROXY_OPT_SACK_PERM |
                                          XT_SYNPROXY_OPT_ECN);
 
-               synproxy_send_client_synack(skb, th, &opts);
+               synproxy_send_client_synack(snet, skb, th, &opts);
                return NF_DROP;
 
        } else if (th->ack && !(th->fin || th->rst || th->syn)) {
@@ -298,11 +303,11 @@ synproxy_tg4(struct sk_buff *skb, const struct xt_action_param *par)
        return XT_CONTINUE;
 }
 
-static unsigned int ipv4_synproxy_hook(const struct nf_hook_ops *ops,
+static unsigned int ipv4_synproxy_hook(void *priv,
                                       struct sk_buff *skb,
                                       const struct nf_hook_state *nhs)
 {
-       struct synproxy_net *snet = synproxy_pernet(dev_net(nhs->in ? : nhs->out));
+       struct synproxy_net *snet = synproxy_pernet(nhs->net);
        enum ip_conntrack_info ctinfo;
        struct nf_conn *ct;
        struct nf_conn_synproxy *synproxy;
@@ -432,14 +437,12 @@ static struct xt_target synproxy_tg4_reg __read_mostly = {
 static struct nf_hook_ops ipv4_synproxy_ops[] __read_mostly = {
        {
                .hook           = ipv4_synproxy_hook,
-               .owner          = THIS_MODULE,
                .pf             = NFPROTO_IPV4,
                .hooknum        = NF_INET_LOCAL_IN,
                .priority       = NF_IP_PRI_CONNTRACK_CONFIRM - 1,
        },
        {
                .hook           = ipv4_synproxy_hook,
-               .owner          = THIS_MODULE,
                .pf             = NFPROTO_IPV4,
                .hooknum        = NF_INET_POST_ROUTING,
                .priority       = NF_IP_PRI_CONNTRACK_CONFIRM - 1,