include/net/netfilter/nf_reject.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _NF_REJECT_H
   3 #define _NF_REJECT_H
   4
   5 static inline bool nf_reject_verify_csum(__u8 proto)
   6 {
   7         /* Skip protocols that don't use 16-bit one's complement checksum
   8          * of the entire payload.
   9          */
  10         switch (proto) {
  11                 /* Protocols with other integrity checks. */
  12                 case IPPROTO_AH:
  13                 case IPPROTO_ESP:
  14                 case IPPROTO_SCTP:
  15
  16                 /* Protocols with partial checksums. */
  17                 case IPPROTO_UDPLITE:
  18                 case IPPROTO_DCCP:
  19
  20                 /* Protocols with optional checksums. */
  21                 case IPPROTO_GRE:
  22                         return false;
  23         }
  24         return true;
  25 }
  26
  27 #endif /* _NF_REJECT_H */