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netfilter: x_tables: use correct integer types

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Sparse complains because __be32 and u32 are mixed without
conversions.  Use the correct types, no code changes.

Furthermore, xt_DSCP generates a bit truncation warning:
"cast truncates bits from constant value (ffffff03 becomes 3)"

The truncation is fine (and wanted). Add a private definition and use that
instead.

objdiff shows no changes.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2022-06-23 15:05:10 +02:00 committed by Pablo Neira Ayuso
parent ec6f2ff0a3
commit 168141f7e0
3 changed files with 9 additions and 9 deletions
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8
net/netfilter/xt_DSCP.c
View file

@ -24,6 +24,8 @@ MODULE_ALIAS("ip6t_DSCP");
MODULE_ALIAS("ipt_TOS");
MODULE_ALIAS("ip6t_TOS");
#define XT_DSCP_ECN_MASK 3u
static unsigned int
dscp_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
@ -34,8 +36,7 @@ dscp_tg(struct sk_buff *skb, const struct xt_action_param *par)
if (skb_ensure_writable(skb, sizeof(struct iphdr)))
return NF_DROP;
ipv4_change_dsfield(ip_hdr(skb),
(__force __u8)(~XT_DSCP_MASK),
ipv4_change_dsfield(ip_hdr(skb), XT_DSCP_ECN_MASK,
dinfo->dscp << XT_DSCP_SHIFT);
}
@ -52,8 +53,7 @@ dscp_tg6(struct sk_buff *skb, const struct xt_action_param *par)
if (skb_ensure_writable(skb, sizeof(struct ipv6hdr)))
return NF_DROP;
ipv6_change_dsfield(ipv6_hdr(skb),
(__force __u8)(~XT_DSCP_MASK),
ipv6_change_dsfield(ipv6_hdr(skb), XT_DSCP_ECN_MASK,
dinfo->dscp << XT_DSCP_SHIFT);
}
return XT_CONTINUE;

4
net/netfilter/xt_TCPMSS.c
View file

@ -239,8 +239,8 @@ tcpmss_tg6(struct sk_buff *skb, const struct xt_action_param *par)
oldlen = ipv6h->payload_len;
newlen = htons(ntohs(oldlen) + ret);
if (skb->ip_summed == CHECKSUM_COMPLETE)
skb->csum = csum_add(csum_sub(skb->csum, oldlen),
newlen);
skb->csum = csum_add(csum_sub(skb->csum, (__force __wsum)oldlen),
(__force __wsum)newlen);
ipv6h->payload_len = newlen;
}
return XT_CONTINUE;

6
net/netfilter/xt_connlimit.c
View file

@ -62,10 +62,10 @@ connlimit_mt(const struct sk_buff *skb, struct xt_action_param *par)
key[4] = zone->id;
} else {
const struct iphdr *iph = ip_hdr(skb);
key[0] = (info->flags & XT_CONNLIMIT_DADDR) ?
iph->daddr : iph->saddr;
key[0] &= info->mask.ip;
key[0] = (info->flags & XT_CONNLIMIT_DADDR) ?
(__force __u32)iph->daddr : (__force __u32)iph->saddr;
key[0] &= (__force __u32)info->mask.ip;
key[1] = zone->id;
}