[DECNET]: Endianess fixes (try #2)

Here are some fixes to endianess problems spotted by Al Viro.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/decnet/af_decnet.c

@@ -166,7 +166,7 @@ static struct hlist_head *dn_find_list(struct sock *sk)
 	if (scp->addr.sdn_flags & SDF_WILD)
 		return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
 
-	return &dn_sk_hash[scp->addrloc & DN_SK_HASH_MASK];
+	return &dn_sk_hash[dn_ntohs(scp->addrloc) & DN_SK_HASH_MASK];
 }
 
 /* 
@@ -180,7 +180,7 @@ static int check_port(__le16 port)
 	if (port == 0)
 		return -1;
 
-	sk_for_each(sk, node, &dn_sk_hash[port & DN_SK_HASH_MASK]) {
+	sk_for_each(sk, node, &dn_sk_hash[dn_ntohs(port) & DN_SK_HASH_MASK]) {
 		struct dn_scp *scp = DN_SK(sk);
 		if (scp->addrloc == port)
 			return -1;
@@ -194,12 +194,12 @@ static unsigned short port_alloc(struct sock *sk)
 static unsigned short port = 0x2000;
 	unsigned short i_port = port;
 
-	while(check_port(++port) != 0) {
+	while(check_port(dn_htons(++port)) != 0) {
 		if (port == i_port)
 			return 0;
 	}
 
-	scp->addrloc = port;
+	scp->addrloc = dn_htons(port);
 
 	return 1;
 }
@@ -418,7 +418,7 @@ struct sock *dn_find_by_skb(struct sk_buff *skb)
 	struct dn_scp *scp;
 
 	read_lock(&dn_hash_lock);
-	sk_for_each(sk, node, &dn_sk_hash[cb->dst_port & DN_SK_HASH_MASK]) {
+	sk_for_each(sk, node, &dn_sk_hash[dn_ntohs(cb->dst_port) & DN_SK_HASH_MASK]) {
 		scp = DN_SK(sk);
 		if (cb->src != dn_saddr2dn(&scp->peer))
 			continue;
@@ -1017,12 +1017,13 @@ static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
 static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
 {
 	unsigned char *ptr = skb->data;
+	u16 len = *ptr++; /* yes, it's 8bit on the wire */
 
-        opt->opt_optl   = *ptr++;
+	BUG_ON(len > 16); /* we've checked the contents earlier */
+	opt->opt_optl   = dn_htons(len);
 	opt->opt_status = 0;
-        memcpy(opt->opt_data, ptr, opt->opt_optl);
-        skb_pull(skb, dn_ntohs(opt->opt_optl) + 1);
-
+	memcpy(opt->opt_data, ptr, len);
+	skb_pull(skb, len + 1);
 }
 
 static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)

net/decnet/dn_nsp_in.c

@@ -360,9 +360,9 @@ static void dn_nsp_conn_conf(struct sock *sk, struct sk_buff *skb)
 			scp->max_window = decnet_no_fc_max_cwnd;
 
 		if (skb->len > 0) {
-			unsigned char dlen = *skb->data;
+			u16 dlen = *skb->data;
 			if ((dlen <= 16) && (dlen <= skb->len)) {
-				scp->conndata_in.opt_optl = dn_htons((__u16)dlen);
+				scp->conndata_in.opt_optl = dn_htons(dlen);
 				memcpy(scp->conndata_in.opt_data, skb->data + 1, dlen);
 			}
 		}
@@ -404,9 +404,9 @@ static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb)
 	memset(scp->discdata_in.opt_data, 0, 16);
 
 	if (skb->len > 0) {
-		unsigned char dlen = *skb->data;
+		u16 dlen = *skb->data;
 		if ((dlen <= 16) && (dlen <= skb->len)) {
-			scp->discdata_in.opt_optl = dn_htons((__u16)dlen);
+			scp->discdata_in.opt_optl = dn_htons(dlen);
 			memcpy(scp->discdata_in.opt_data, skb->data + 1, dlen);
 		}
 	}

net/decnet/dn_nsp_out.c

@@ -526,7 +526,7 @@ void dn_send_conn_conf(struct sock *sk, gfp_t gfp)
         struct nsp_conn_init_msg *msg;
 	__u8 len = (__u8)dn_ntohs(scp->conndata_out.opt_optl);
 
-	if ((skb = dn_alloc_skb(sk, 50 + dn_ntohs(scp->conndata_out.opt_optl), gfp)) == NULL)
+	if ((skb = dn_alloc_skb(sk, 50 + len, gfp)) == NULL)
 		return;
 
         msg = (struct nsp_conn_init_msg *)skb_put(skb, sizeof(*msg));

net/decnet/dn_rules.c

@@ -124,8 +124,8 @@ static struct nla_policy dn_fib_rule_policy[FRA_MAX+1] __read_mostly = {
 static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
 {
 	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-	u16 daddr = fl->fld_dst;
-	u16 saddr = fl->fld_src;
+	__le16 daddr = fl->fld_dst;
+	__le16 saddr = fl->fld_src;
 
 	if (((saddr ^ r->src) & r->srcmask) ||
 	    ((daddr ^ r->dst) & r->dstmask))