From 2c2f08d31d2f6cd5621b121d596986bd54da679a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Wed, 5 Mar 2025 23:38:44 +0100 Subject: tcp: extend TCP flags to allow AE bit/ACE field MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With AccECN, there's one additional TCP flag to be used (AE) and ACE field that overloads the definition of AE, CWR, and ECE flags. As tcp_flags was previously only 1 byte, the byte-order stuff needs to be added to it's handling. Signed-off-by: Ilpo Järvinen Signed-off-by: Chia-Yu Chang Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller --- include/uapi/linux/tcp.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index 32a27b4a5020..92a2e79222ea 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -28,7 +28,8 @@ struct tcphdr { __be32 seq; __be32 ack_seq; #if defined(__LITTLE_ENDIAN_BITFIELD) - __u16 res1:4, + __u16 ae:1, + res1:3, doff:4, fin:1, syn:1, @@ -40,7 +41,8 @@ struct tcphdr { cwr:1; #elif defined(__BIG_ENDIAN_BITFIELD) __u16 doff:4, - res1:4, + res1:3, + ae:1, cwr:1, ece:1, urg:1, @@ -70,6 +72,7 @@ union tcp_word_hdr { #define tcp_flag_word(tp) (((union tcp_word_hdr *)(tp))->words[3]) enum { + TCP_FLAG_AE = __constant_cpu_to_be32(0x01000000), TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000), TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000), TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000), @@ -78,7 +81,7 @@ enum { TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000), TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000), TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000), - TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000), + TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0E000000), TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000) }; -- cgit v1.2.3