tlshd: replace IPPROTO_QUIC with SOL_QUIC for cmsg_level in quic

SOL_QUIC should be used for the cmsg_level in send/recvmsg().
Although in many transport protocols IPPROTO_XXX == SOL_XXX,
IPPROTO_QUIC != SOL_QUIC in linux quic.

Fixes: 43a15fe ("tlshd: add support for quic handshake")
Signed-off-by: Xin Long <[email protected]>

Author: lxin

src/tlshd/quic.c

@@ -335,7 +335,7 @@ static int quic_handshake_sendmsg(int sockfd, struct tlshd_quic_msg *msg)
 		flags = MSG_MORE;
 
 	cmsg = CMSG_FIRSTHDR(&outmsg);
-	cmsg->cmsg_level = IPPROTO_QUIC;
+	cmsg->cmsg_level = SOL_QUIC;
 	cmsg->cmsg_type = QUIC_HANDSHAKE_INFO;
 	cmsg->cmsg_len = CMSG_LEN(sizeof(*info));
 
@@ -373,7 +373,7 @@ static int quic_handshake_recvmsg(int sockfd, struct tlshd_quic_msg *msg)
 	msg->len = ret;
 
 	for (cmsg = CMSG_FIRSTHDR(&inmsg); cmsg != NULL; cmsg = CMSG_NXTHDR(&inmsg, cmsg))
-		if (IPPROTO_QUIC == cmsg->cmsg_level && QUIC_HANDSHAKE_INFO == cmsg->cmsg_type)
+		if (SOL_QUIC == cmsg->cmsg_level && QUIC_HANDSHAKE_INFO == cmsg->cmsg_type)
 			break;
 	if (cmsg) {
 		memcpy(&info, CMSG_DATA(cmsg), sizeof(info));