diff options
Diffstat (limited to 'net/core/utils.c')
| -rw-r--r-- | net/core/utils.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/core/utils.c b/net/core/utils.c index cd7d202..3dffce9 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -336,6 +336,19 @@ void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb, } EXPORT_SYMBOL(inet_proto_csum_replace16); +void inet_proto_csum_replace_by_diff(__sum16 *sum, struct sk_buff *skb, + __wsum diff, bool pseudohdr) +{ + if (skb->ip_summed != CHECKSUM_PARTIAL) { + *sum = csum_fold(csum_add(diff, ~csum_unfold(*sum))); + if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr) + skb->csum = ~csum_add(diff, ~skb->csum); + } else if (pseudohdr) { + *sum = ~csum_fold(csum_add(diff, csum_unfold(*sum))); + } +} +EXPORT_SYMBOL(inet_proto_csum_replace_by_diff); + struct __net_random_once_work { struct work_struct work; struct static_key *key; |
