[NETFILTER]: NAT annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 50 insertions, 53 deletions

diff --git a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c
index 71f3e09cbc84..4b6260a97408 100644
--- a/net/ipv4/netfilter/ip_nat_core.c
+++ b/net/ipv4/netfilter/ip_nat_core.c
@@ -82,7 +82,7 @@ static inline unsigned int
 hash_by_src(const struct ip_conntrack_tuple *tuple)
 {
         /* Original src, to ensure we map it consistently if poss. */
-        return jhash_3words(tuple->src.ip, tuple->src.u.all,
+        return jhash_3words((__force u32)tuple->src.ip, tuple->src.u.all,
                             tuple->dst.protonum, 0) % ip_nat_htable_size;
 }
 
@@ -190,7 +190,7 @@ find_best_ips_proto(struct ip_conntrack_tuple *tuple,
                     const struct ip_conntrack *conntrack,
                     enum ip_nat_manip_type maniptype)
 {
-        u_int32_t *var_ipp;
+        __be32 *var_ipp;
         /* Host order */
         u_int32_t minip, maxip, j;
 
@@ -217,7 +217,7 @@ find_best_ips_proto(struct ip_conntrack_tuple *tuple,
          * like this), even across reboots. */
         minip = ntohl(range->min_ip);
         maxip = ntohl(range->max_ip);
-        j = jhash_2words(tuple->src.ip, tuple->dst.ip, 0);
+        j = jhash_2words((__force u32)tuple->src.ip, (__force u32)tuple->dst.ip, 0);
         *var_ipp = htonl(minip + j % (maxip - minip + 1));
 }
 
@@ -534,9 +534,9 @@ int
 ip_nat_port_range_to_nfattr(struct sk_buff *skb, 
                             const struct ip_nat_range *range)
 {
-        NFA_PUT(skb, CTA_PROTONAT_PORT_MIN, sizeof(u_int16_t),
+        NFA_PUT(skb, CTA_PROTONAT_PORT_MIN, sizeof(__be16),
                 &range->min.tcp.port);
-        NFA_PUT(skb, CTA_PROTONAT_PORT_MAX, sizeof(u_int16_t),
+        NFA_PUT(skb, CTA_PROTONAT_PORT_MAX, sizeof(__be16),
                 &range->max.tcp.port);
 
         return 0;
@@ -555,7 +555,7 @@ ip_nat_port_nfattr_to_range(struct nfattr *tb[], struct ip_nat_range *range)
         if (tb[CTA_PROTONAT_PORT_MIN-1]) {
                 ret = 1;
                 range->min.tcp.port = 
-                        *(u_int16_t *)NFA_DATA(tb[CTA_PROTONAT_PORT_MIN-1]);
+                        *(__be16 *)NFA_DATA(tb[CTA_PROTONAT_PORT_MIN-1]);
         }
         
         if (!tb[CTA_PROTONAT_PORT_MAX-1]) {
@@ -564,7 +564,7 @@ ip_nat_port_nfattr_to_range(struct nfattr *tb[], struct ip_nat_range *range)
         } else {
                 ret = 1;
                 range->max.tcp.port = 
-                        *(u_int16_t *)NFA_DATA(tb[CTA_PROTONAT_PORT_MAX-1]);
+                        *(__be16 *)NFA_DATA(tb[CTA_PROTONAT_PORT_MAX-1]);
         }
 
         return ret;
diff --git a/net/ipv4/netfilter/ip_nat_ftp.c b/net/ipv4/netfilter/ip_nat_ftp.c
index 3328fc5c5f50..a71c233d8112 100644
--- a/net/ipv4/netfilter/ip_nat_ftp.c
+++ b/net/ipv4/netfilter/ip_nat_ftp.c
@@ -34,7 +34,7 @@ MODULE_DESCRIPTION("ftp NAT helper");
 
 static int
 mangle_rfc959_packet(struct sk_buff **pskb,
-                     u_int32_t newip,
+                     __be32 newip,
                      u_int16_t port,
                      unsigned int matchoff,
                      unsigned int matchlen,
@@ -57,7 +57,7 @@ mangle_rfc959_packet(struct sk_buff **pskb,
 /* |1|132.235.1.2|6275| */
 static int
 mangle_eprt_packet(struct sk_buff **pskb,
-                   u_int32_t newip,
+                   __be32 newip,
                    u_int16_t port,
                    unsigned int matchoff,
                    unsigned int matchlen,
@@ -79,7 +79,7 @@ mangle_eprt_packet(struct sk_buff **pskb,
 /* |1|132.235.1.2|6275| */
 static int
 mangle_epsv_packet(struct sk_buff **pskb,
-                   u_int32_t newip,
+                   __be32 newip,
                    u_int16_t port,
                    unsigned int matchoff,
                    unsigned int matchlen,
@@ -98,7 +98,7 @@ mangle_epsv_packet(struct sk_buff **pskb,
                                         matchlen, buffer, strlen(buffer));
 }
 
-static int (*mangle[])(struct sk_buff **, u_int32_t, u_int16_t,
+static int (*mangle[])(struct sk_buff **, __be32, u_int16_t,
                      unsigned int,
                      unsigned int,
                      struct ip_conntrack *,
@@ -120,7 +120,7 @@ static unsigned int ip_nat_ftp(struct sk_buff **pskb,
                                struct ip_conntrack_expect *exp,
                                u32 *seq)
 {
-        u_int32_t newip;
+        __be32 newip;
         u_int16_t port;
         int dir = CTINFO2DIR(ctinfo);
         struct ip_conntrack *ct = exp->master;
diff --git a/net/ipv4/netfilter/ip_nat_helper.c b/net/ipv4/netfilter/ip_nat_helper.c
index e9c5187ea5b2..3bf858480558 100644
--- a/net/ipv4/netfilter/ip_nat_helper.c
+++ b/net/ipv4/netfilter/ip_nat_helper.c
@@ -189,7 +189,7 @@ ip_nat_mangle_tcp_packet(struct sk_buff **pskb,
                                                         datalen, 0));
         } else
                 tcph->check = nf_proto_csum_update(*pskb,
-                                                   htons(oldlen) ^ 0xFFFF,
+                                                   htons(oldlen) ^ htons(0xFFFF),
                                                    htons(datalen),
                                                    tcph->check, 1);
 
@@ -267,7 +267,7 @@ ip_nat_mangle_udp_packet(struct sk_buff **pskb,
                         udph->check = -1;
         } else
                 udph->check = nf_proto_csum_update(*pskb,
-                                                   htons(oldlen) ^ 0xFFFF,
+                                                   htons(oldlen) ^ htons(0xFFFF),
                                                    htons(datalen),
                                                    udph->check, 1);
         return 1;
@@ -284,26 +284,24 @@ sack_adjust(struct sk_buff *skb,
 {
         while (sackoff < sackend) {
                 struct tcp_sack_block_wire *sack;
-                u_int32_t new_start_seq, new_end_seq;
+                __be32 new_start_seq, new_end_seq;
 
                 sack = (void *)skb->data + sackoff;
                 if (after(ntohl(sack->start_seq) - natseq->offset_before,
                           natseq->correction_pos))
-                        new_start_seq = ntohl(sack->start_seq) 
-                                        - natseq->offset_after;
+                        new_start_seq = htonl(ntohl(sack->start_seq)
+                                        - natseq->offset_after);
                 else
-                        new_start_seq = ntohl(sack->start_seq) 
-                                        - natseq->offset_before;
-                new_start_seq = htonl(new_start_seq);
+                        new_start_seq = htonl(ntohl(sack->start_seq)
+                                        - natseq->offset_before);
 
                 if (after(ntohl(sack->end_seq) - natseq->offset_before,
                           natseq->correction_pos))
-                        new_end_seq = ntohl(sack->end_seq)
-                                      - natseq->offset_after;
+                        new_end_seq = htonl(ntohl(sack->end_seq)
+                                      - natseq->offset_after);
                 else
-                        new_end_seq = ntohl(sack->end_seq)
-                                      - natseq->offset_before;
-                new_end_seq = htonl(new_end_seq);
+                        new_end_seq = htonl(ntohl(sack->end_seq)
+                                      - natseq->offset_before);
 
                 DEBUGP("sack_adjust: start_seq: %d->%d, end_seq: %d->%d\n",
                         ntohl(sack->start_seq), new_start_seq,
@@ -375,7 +373,8 @@ ip_nat_seq_adjust(struct sk_buff **pskb,
                   enum ip_conntrack_info ctinfo)
 {
         struct tcphdr *tcph;
-        int dir, newseq, newack;
+        int dir;
+        __be32 newseq, newack;
         struct ip_nat_seq *this_way, *other_way;        
 
         dir = CTINFO2DIR(ctinfo);
@@ -388,17 +387,15 @@ ip_nat_seq_adjust(struct sk_buff **pskb,
 
         tcph = (void *)(*pskb)->data + (*pskb)->nh.iph->ihl*4;
         if (after(ntohl(tcph->seq), this_way->correction_pos))
-                newseq = ntohl(tcph->seq) + this_way->offset_after;
+                newseq = htonl(ntohl(tcph->seq) + this_way->offset_after);
         else
-                newseq = ntohl(tcph->seq) + this_way->offset_before;
-        newseq = htonl(newseq);
+                newseq = htonl(ntohl(tcph->seq) + this_way->offset_before);
 
         if (after(ntohl(tcph->ack_seq) - other_way->offset_before,
                   other_way->correction_pos))
-                newack = ntohl(tcph->ack_seq) - other_way->offset_after;
+                newack = htonl(ntohl(tcph->ack_seq) - other_way->offset_after);
         else
-                newack = ntohl(tcph->ack_seq) - other_way->offset_before;
-        newack = htonl(newack);
+                newack = htonl(ntohl(tcph->ack_seq) - other_way->offset_before);
 
         tcph->check = nf_proto_csum_update(*pskb, ~tcph->seq, newseq,
                                            tcph->check, 0);
diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c
index 2ff578807123..329fdcd7d702 100644
--- a/net/ipv4/netfilter/ip_nat_helper_pptp.c
+++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c
@@ -51,7 +51,7 @@
 
 #define IP_NAT_PPTP_VERSION "3.0"
 
-#define REQ_CID(req, off)               (*(u_int16_t *)((char *)(req) + (off)))
+#define REQ_CID(req, off)               (*(__be16 *)((char *)(req) + (off)))
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
diff --git a/net/ipv4/netfilter/ip_nat_proto_icmp.c b/net/ipv4/netfilter/ip_nat_proto_icmp.c
index ec50cc295317..3f6efc13ac74 100644
--- a/net/ipv4/netfilter/ip_nat_proto_icmp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_icmp.c
@@ -67,7 +67,7 @@ icmp_manip_pkt(struct sk_buff **pskb,
 
         hdr = (struct icmphdr *)((*pskb)->data + hdroff);
         hdr->checksum = nf_proto_csum_update(*pskb,
-                                             hdr->un.echo.id ^ 0xFFFF,
+                                             hdr->un.echo.id ^ htons(0xFFFF),
                                              tuple->src.u.icmp.id,
                                              hdr->checksum, 0);
         hdr->un.echo.id = tuple->src.u.icmp.id;
diff --git a/net/ipv4/netfilter/ip_nat_proto_tcp.c b/net/ipv4/netfilter/ip_nat_proto_tcp.c
index 72a6307bd2db..12deb13b93b1 100644
--- a/net/ipv4/netfilter/ip_nat_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_tcp.c
@@ -24,7 +24,7 @@ tcp_in_range(const struct ip_conntrack_tuple *tuple,
              const union ip_conntrack_manip_proto *min,
              const union ip_conntrack_manip_proto *max)
 {
-        u_int16_t port;
+        __be16 port;
 
         if (maniptype == IP_NAT_MANIP_SRC)
                 port = tuple->src.u.tcp.port;
@@ -42,7 +42,7 @@ tcp_unique_tuple(struct ip_conntrack_tuple *tuple,
                  const struct ip_conntrack *conntrack)
 {
         static u_int16_t port;
-        u_int16_t *portptr;
+        __be16 *portptr;
         unsigned int range_size, min, i;
 
         if (maniptype == IP_NAT_MANIP_SRC)
@@ -93,8 +93,8 @@ tcp_manip_pkt(struct sk_buff **pskb,
         struct iphdr *iph = (struct iphdr *)((*pskb)->data + iphdroff);
         struct tcphdr *hdr;
         unsigned int hdroff = iphdroff + iph->ihl*4;
-        u32 oldip, newip;
-        u16 *portptr, newport, oldport;
+        __be32 oldip, newip;
+        __be16 *portptr, newport, oldport;
         int hdrsize = 8; /* TCP connection tracking guarantees this much */
 
         /* this could be a inner header returned in icmp packet; in such
@@ -130,7 +130,7 @@ tcp_manip_pkt(struct sk_buff **pskb,
                 return 1;
 
         hdr->check = nf_proto_csum_update(*pskb, ~oldip, newip, hdr->check, 1);
-        hdr->check = nf_proto_csum_update(*pskb, oldport ^ 0xFFFF, newport,
+        hdr->check = nf_proto_csum_update(*pskb, oldport ^ htons(0xFFFF), newport,
                                           hdr->check, 0);
         return 1;
 }
diff --git a/net/ipv4/netfilter/ip_nat_proto_udp.c b/net/ipv4/netfilter/ip_nat_proto_udp.c
index 5da196ae758c..4bbec7730d18 100644
--- a/net/ipv4/netfilter/ip_nat_proto_udp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_udp.c
@@ -24,7 +24,7 @@ udp_in_range(const struct ip_conntrack_tuple *tuple,
              const union ip_conntrack_manip_proto *min,
              const union ip_conntrack_manip_proto *max)
 {
-        u_int16_t port;
+        __be16 port;
 
         if (maniptype == IP_NAT_MANIP_SRC)
                 port = tuple->src.u.udp.port;
@@ -42,7 +42,7 @@ udp_unique_tuple(struct ip_conntrack_tuple *tuple,
                  const struct ip_conntrack *conntrack)
 {
         static u_int16_t port;
-        u_int16_t *portptr;
+        __be16 *portptr;
         unsigned int range_size, min, i;
 
         if (maniptype == IP_NAT_MANIP_SRC)
@@ -91,8 +91,8 @@ udp_manip_pkt(struct sk_buff **pskb,
         struct iphdr *iph = (struct iphdr *)((*pskb)->data + iphdroff);
         struct udphdr *hdr;
         unsigned int hdroff = iphdroff + iph->ihl*4;
-        u32 oldip, newip;
-        u16 *portptr, newport;
+        __be32 oldip, newip;
+        __be16 *portptr, newport;
 
         if (!skb_make_writable(pskb, hdroff + sizeof(*hdr)))
                 return 0;
@@ -118,7 +118,7 @@ udp_manip_pkt(struct sk_buff **pskb,
                 hdr->check = nf_proto_csum_update(*pskb, ~oldip, newip,
                                                   hdr->check, 1);
                 hdr->check = nf_proto_csum_update(*pskb,
-                                                  *portptr ^ 0xFFFF, newport,
+                                                  *portptr ^ htons(0xFFFF), newport,
                                                   hdr->check, 0);
                 if (!hdr->check)
                         hdr->check = -1;
diff --git a/net/ipv4/netfilter/ip_nat_rule.c b/net/ipv4/netfilter/ip_nat_rule.c
index 7b703839aa58..a176aa3031e0 100644
--- a/net/ipv4/netfilter/ip_nat_rule.c
+++ b/net/ipv4/netfilter/ip_nat_rule.c
@@ -119,7 +119,7 @@ static unsigned int ipt_snat_target(struct sk_buff **pskb,
 }
 
 /* Before 2.6.11 we did implicit source NAT if required. Warn about change. */
-static void warn_if_extra_mangle(u32 dstip, u32 srcip)
+static void warn_if_extra_mangle(__be32 dstip, __be32 srcip)
 {
         static int warned = 0;
         struct flowi fl = { .nl_u = { .ip4_u = { .daddr = dstip } } };
@@ -205,7 +205,7 @@ alloc_null_binding(struct ip_conntrack *conntrack,
            per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
            Use reply in case it's already been mangled (eg local packet).
         */
-        u_int32_t ip
+        __be32 ip
                 = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
                    ? conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip
                    : conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
@@ -222,7 +222,7 @@ alloc_null_binding_confirmed(struct ip_conntrack *conntrack,
                              struct ip_nat_info *info,
                              unsigned int hooknum)
 {
-        u_int32_t ip
+        __be32 ip
                 = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
                    ? conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip
                    : conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
diff --git a/net/ipv4/netfilter/ip_nat_sip.c b/net/ipv4/netfilter/ip_nat_sip.c
index 6ffba63adca2..71fc2730a007 100644
--- a/net/ipv4/netfilter/ip_nat_sip.c
+++ b/net/ipv4/netfilter/ip_nat_sip.c
@@ -60,8 +60,8 @@ static unsigned int ip_nat_sip(struct sk_buff **pskb,
         enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
         char buffer[sizeof("nnn.nnn.nnn.nnn:nnnnn")];
         unsigned int bufflen, dataoff;
-        u_int32_t ip;
-        u_int16_t port;
+        __be32 ip;
+        __be16 port;
 
         dataoff = (*pskb)->nh.iph->ihl*4 + sizeof(struct udphdr);
 
@@ -159,7 +159,7 @@ static int mangle_content_len(struct sk_buff **pskb,
 static unsigned int mangle_sdp(struct sk_buff **pskb,
                                enum ip_conntrack_info ctinfo,
                                struct ip_conntrack *ct,
-                               u_int32_t newip, u_int16_t port,
+                               __be32 newip, u_int16_t port,
                                const char *dptr)
 {
         char buffer[sizeof("nnn.nnn.nnn.nnn")];
@@ -195,7 +195,7 @@ static unsigned int ip_nat_sdp(struct sk_buff **pskb,
 {
         struct ip_conntrack *ct = exp->master;
         enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
-        u_int32_t newip;
+        __be32 newip;
         u_int16_t port;
 
         DEBUGP("ip_nat_sdp():\n");
diff --git a/net/ipv4/netfilter/ip_nat_snmp_basic.c b/net/ipv4/netfilter/ip_nat_snmp_basic.c
index 18b7fbdccb61..168f45fa1898 100644
--- a/net/ipv4/netfilter/ip_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/ip_nat_snmp_basic.c
@@ -1211,7 +1211,7 @@ static int snmp_translate(struct ip_conntrack *ct,
                           struct sk_buff **pskb)
 {
         struct iphdr *iph = (*pskb)->nh.iph;
-        struct udphdr *udph = (struct udphdr *)((u_int32_t *)iph + iph->ihl);
+        struct udphdr *udph = (struct udphdr *)((__be32 *)iph + iph->ihl);
         u_int16_t udplen = ntohs(udph->len);
         u_int16_t paylen = udplen - sizeof(struct udphdr);
         int dir = CTINFO2DIR(ctinfo);
diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index 9c577db62047..021395b67463 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -191,7 +191,7 @@ ip_nat_in(unsigned int hooknum,
           int (*okfn)(struct sk_buff *))
 {
         unsigned int ret;
-        u_int32_t daddr = (*pskb)->nh.iph->daddr;
+        __be32 daddr = (*pskb)->nh.iph->daddr;
 
         ret = ip_nat_fn(hooknum, pskb, in, out, okfn);
         if (ret != NF_DROP && ret != NF_STOLEN