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ip: introduce ip_is_fragment helper inline function

Browse source 
There are enough instances of this:

    iph->frag_off & htons(IP_MF | IP_OFFSET)

that a helper function is probably warranted.

Signed-off-by: Paul Gortmaker <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Paul Gortmaker 2011-06-21 20:33:34 -07:00 • committed by David S. Miller
commit 56f8a75c17
19 changed files with 27 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/ipv4/ip_input.c
View file

@ -165,7 +165,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
(!sk->sk_bound_dev_if ||
sk->sk_bound_dev_if == dev->ifindex) &&
net_eq(sock_net(sk), dev_net(dev))) {
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
if (ip_is_fragment(ip_hdr(skb))) {
if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN))
return 1;
}
@ -256,7 +256,7 @@ int ip_local_deliver(struct sk_buff *skb)
* Reassemble IP fragments.
*/
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
if (ip_is_fragment(ip_hdr(skb))) {
if (ip_defrag(skb, IP_DEFRAG_LOCAL_DELIVER))
return 0;
}

2
net/ipv4/ip_output.c
View file

@ -489,7 +489,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
if (first_len - hlen > mtu ||
((first_len - hlen) & 7) ||
(iph->frag_off & htons(IP_MF|IP_OFFSET)) ||
ip_is_fragment(iph) ||
skb_cloned(skb))
goto slow_path;

2
net/ipv4/ipconfig.c
View file

@ -932,7 +932,7 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
goto drop;
/* Fragments are not supported */
if (h->frag_off & htons(IP_OFFSET | IP_MF)) {
if (ip_is_fragment(h)) {
if (net_ratelimit())
printk(KERN_ERR "DHCP/BOOTP: Ignoring fragmented "
"reply.\n");

2
net/ipv4/netfilter/nf_defrag_ipv4.c
View file

@ -82,7 +82,7 @@ static unsigned int ipv4_conntrack_defrag(unsigned int hooknum,
#endif
#endif
/* Gather fragments. */
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
if (ip_is_fragment(ip_hdr(skb))) {
enum ip_defrag_users user = nf_ct_defrag_user(hooknum, skb);
if (nf_ct_ipv4_gather_frags(skb, user))
return NF_STOLEN;

2
net/ipv4/netfilter/nf_nat_standalone.c
View file

@ -88,7 +88,7 @@ nf_nat_fn(unsigned int hooknum,
/* We never see fragments: conntrack defrags on pre-routing
and local-out, and nf_nat_out protects post-routing. */
NF_CT_ASSERT(!(ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)));
NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
ct = nf_ct_get(skb, &ctinfo);
/* Can't track? It's not due to stress, or conntrack would

2
net/ipv4/xfrm4_policy.c
View file

@ -117,7 +117,7 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
memset(fl4, 0, sizeof(struct flowi4));
fl4->flowi4_mark = skb->mark;
if (!(iph->frag_off & htons(IP_MF | IP_OFFSET))) {
if (!ip_is_fragment(iph)) {
switch (iph->protocol) {
case IPPROTO_UDP:
case IPPROTO_UDPLITE: