This patch adds IPPROTO_QUIC and SOL_QUIC constants to the networking
subsystem. These definitions are essential for applications to set
socket options and protocol identifiers related to the QUIC protocol.
QUIC does not possess a protocol number allocated from IANA, and like
IPPROTO_MPTCP, IPPROTO_QUIC is merely a value used when opening a QUIC
socket with:
socket(AF_INET, SOCK_STREAM, IPPROTO_QUIC);
Note we did not opt for UDP ULP for QUIC implementation due to several
considerations:
- QUIC's connection Migration requires at least 2 UDP sockets for one
QUIC connection at the same time, not to mention the multipath
feature in one of its draft RFCs.
- In-Kernel QUIC, as a Transport Protocol, wants to provide users with
the TCP or SCTP like Socket APIs, like connect()/listen()/accept()...
Note that a single UDP socket might even be used for multiple QUIC
connections.
The use of IPPROTO_QUIC type sockets over UDP tunnel will effectively
address these challenges and provides a more flexible and scalable
solution.
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Signed-off-by: Moritz Buhl <mbuhl@xxxxxxxxxxx>
Signed-off-by: Tyler Fanelli <tfanelli@xxxxxxxxxx>
Signed-off-by: Pengtao He <hepengtao@xxxxxxxxxx>
---
include/linux/socket.h | 1 +
include/uapi/linux/in.h | 2 ++
2 files changed, 3 insertions(+)
diff --git a/include/linux/socket.h b/include/linux/socket.h
index df9cdb8bbfb8..e9db28c55a37 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -385,6 +385,7 @@ struct ucred {
#define SOL_MCTP 285
#define SOL_SMC 286
#define SOL_VSOCK 287
+#define SOL_QUIC 288
/* IPX options */
#define IPX_TYPE 1
diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
index 5d32d53508d9..63f900290b96 100644
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -83,6 +83,8 @@ enum {
#define IPPROTO_RAW IPPROTO_RAW
IPPROTO_SMC = 256, /* Shared Memory Communications */
#define IPPROTO_SMC IPPROTO_SMC
+ IPPROTO_QUIC = 261, /* A UDP-Based Multiplexed and Secure Transport */
+#define IPPROTO_QUIC IPPROTO_QUIC
IPPROTO_MPTCP = 262, /* Multipath TCP connection */
#define IPPROTO_MPTCP IPPROTO_MPTCP
IPPROTO_MAX
--
2.43.0
