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compat_xtables: fix compilation with <= 2.6.19

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Once upon a time there was no such checksumming...
This commit is contained in:
Jan Engelhardt
2009-04-30 20:23:52 +02:00
parent 637516f2d4
commit 73e7b5ead1
4 changed files with 34 additions and 10 deletions
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14
extensions/xt_RAWNAT.c
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@@ -79,6 +79,7 @@ static void rawnat4_update_l4(struct sk_buff *skb, __be32 oldip, __be32 newip)
void *transport_hdr = (void *)iph + ip_hdrlen(skb);
struct tcphdr *tcph;
struct udphdr *udph;
bool cond;
switch (iph->protocol) {
case IPPROTO_TCP:
@@ -88,7 +89,11 @@ static void rawnat4_update_l4(struct sk_buff *skb, __be32 oldip, __be32 newip)
case IPPROTO_UDP:
case IPPROTO_UDPLITE:
udph = transport_hdr;
if (udph->check != 0 || skb->ip_summed == CHECKSUM_PARTIAL) {
cond = udph->check != 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
cond |= skb->ip_summed == CHECKSUM_PARTIAL;
#endif
if (cond) {
inet_proto_csum_replace4(&udph->check, skb,
oldip, newip, true);
if (udph->check == 0)
@@ -200,6 +205,7 @@ static void rawnat6_update_l4(struct sk_buff *skb, unsigned int l4proto,
struct tcphdr *tcph;
struct udphdr *udph;
unsigned int i;
bool cond;
switch (l4proto) {
case IPPROTO_TCP:
@@ -211,7 +217,11 @@ static void rawnat6_update_l4(struct sk_buff *skb, unsigned int l4proto,
case IPPROTO_UDP:
case IPPROTO_UDPLITE:
udph = (void *)iph + l4offset;
if (udph->check != 0 || skb->ip_summed == CHECKSUM_PARTIAL) {
cond = udph->check;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
cond |= skb->ip_summed == CHECKSUM_PARTIAL;
#endif
if (cond) {
for (i = 0; i < 4; ++i)
inet_proto_csum_replace4(&udph->check, skb,
oldip->s6_addr32[i],