[NETFILTER]: nf_{conntrack,nat}_icmp: constify and annotate

Constify a few data tables use const qualifiers on variables where
possible in the nf_conntrack_icmp* sources.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 15 insertions, 11 deletions

diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 17217f4f9918..6873fddb3529 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -26,7 +26,8 @@ static int icmp_pkt_to_tuple(const struct sk_buff *skb,
                              unsigned int dataoff,
                              struct nf_conntrack_tuple *tuple)
 {
-        struct icmphdr _hdr, *hp;
+        const struct icmphdr *hp;
+        struct icmphdr _hdr;
 
         hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
         if (hp == NULL)
@@ -129,8 +130,8 @@ icmp_error_message(struct sk_buff *skb,
                  unsigned int hooknum)
 {
         struct nf_conntrack_tuple innertuple, origtuple;
-        struct nf_conntrack_l4proto *innerproto;
-        struct nf_conntrack_tuple_hash *h;
+        const struct nf_conntrack_l4proto *innerproto;
+        const struct nf_conntrack_tuple_hash *h;
 
         NF_CT_ASSERT(skb->nfct == NULL);
 
@@ -176,7 +177,8 @@ static int
 icmp_error(struct sk_buff *skb, unsigned int dataoff,
            enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
 {
-        struct icmphdr _ih, *icmph;
+        const struct icmphdr *icmph;
+        struct icmphdr _ih;
 
         /* Not enough header? */
         icmph = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_ih), &_ih);
diff --git a/net/ipv4/netfilter/nf_nat_proto_icmp.c b/net/ipv4/netfilter/nf_nat_proto_icmp.c
index a0e44c953cb6..03a02969aa57 100644
--- a/net/ipv4/netfilter/nf_nat_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_nat_proto_icmp.c
@@ -57,7 +57,7 @@ icmp_manip_pkt(struct sk_buff *skb,
                const struct nf_conntrack_tuple *tuple,
                enum nf_nat_manip_type maniptype)
 {
-        struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
+        const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
         struct icmphdr *hdr;
         unsigned int hdroff = iphdroff + iph->ihl*4;
 
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index 430db1de31e3..0897d0f4c4a2 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -32,7 +32,8 @@ static int icmpv6_pkt_to_tuple(const struct sk_buff *skb,
                                unsigned int dataoff,
                                struct nf_conntrack_tuple *tuple)
 {
-        struct icmp6hdr _hdr, *hp;
+        const struct icmp6hdr *hp;
+        struct icmp6hdr _hdr;
 
         hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
         if (hp == NULL)
@@ -45,7 +46,7 @@ static int icmpv6_pkt_to_tuple(const struct sk_buff *skb,
 }
 
 /* Add 1; spaces filled with 0. */
-static u_int8_t invmap[] = {
+static const u_int8_t invmap[] = {
         [ICMPV6_ECHO_REQUEST - 128]     = ICMPV6_ECHO_REPLY + 1,
         [ICMPV6_ECHO_REPLY - 128]       = ICMPV6_ECHO_REQUEST + 1,
         [ICMPV6_NI_QUERY - 128]         = ICMPV6_NI_QUERY + 1,
@@ -105,7 +106,7 @@ static int icmpv6_new(struct nf_conn *ct,
                       const struct sk_buff *skb,
                       unsigned int dataoff)
 {
-        static u_int8_t valid_new[] = {
+        static const u_int8_t valid_new[] = {
                 [ICMPV6_ECHO_REQUEST - 128] = 1,
                 [ICMPV6_NI_QUERY - 128] = 1
         };
@@ -129,8 +130,8 @@ icmpv6_error_message(struct sk_buff *skb,
                      unsigned int hooknum)
 {
         struct nf_conntrack_tuple intuple, origtuple;
-        struct nf_conntrack_tuple_hash *h;
-        struct nf_conntrack_l4proto *inproto;
+        const struct nf_conntrack_tuple_hash *h;
+        const struct nf_conntrack_l4proto *inproto;
 
         NF_CT_ASSERT(skb->nfct == NULL);
 
@@ -176,7 +177,8 @@ static int
 icmpv6_error(struct sk_buff *skb, unsigned int dataoff,
              enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
 {
-        struct icmp6hdr _ih, *icmp6h;
+        const struct icmp6hdr *icmp6h;
+        struct icmp6hdr _ih;
 
         icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
         if (icmp6h == NULL) {