From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/net/netfilter/nf_reject.h | 43 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 include/net/netfilter/nf_reject.h (limited to 'include/net/netfilter/nf_reject.h') diff --git a/include/net/netfilter/nf_reject.h b/include/net/netfilter/nf_reject.h new file mode 100644 index 000000000..7c669792f --- /dev/null +++ b/include/net/netfilter/nf_reject.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _NF_REJECT_H +#define _NF_REJECT_H + +#include +#include + +static inline bool nf_reject_verify_csum(struct sk_buff *skb, int dataoff, + __u8 proto) +{ + /* Skip protocols that don't use 16-bit one's complement checksum + * of the entire payload. + */ + switch (proto) { + /* Protocols with optional checksums. */ + case IPPROTO_UDP: { + const struct udphdr *udp_hdr; + struct udphdr _udp_hdr; + + udp_hdr = skb_header_pointer(skb, dataoff, + sizeof(_udp_hdr), + &_udp_hdr); + if (!udp_hdr || udp_hdr->check) + return true; + + return false; + } + case IPPROTO_GRE: + + /* Protocols with other integrity checks. */ + case IPPROTO_AH: + case IPPROTO_ESP: + case IPPROTO_SCTP: + + /* Protocols with partial checksums. */ + case IPPROTO_UDPLITE: + case IPPROTO_DCCP: + return false; + } + return true; +} + +#endif /* _NF_REJECT_H */ -- cgit v1.2.3