1 files changed, 51 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt b/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt
new file mode 100644
index 000000000000..df49c67645ac
--- /dev/null
+++ b/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+// Test TCP_INQ and TCP_CM_INQ on the client side.
+`./defaults.sh
+`
+
+// Create a socket and set it to non-blocking.
+    0	socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+   +0	fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
+   +0	fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
+
+// Connect to the server and enable TCP_INQ.
+   +0	connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
+   +0	setsockopt(3, SOL_TCP, TCP_INQ, [1], 4) = 0
+
+   +0	> S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
+ +.01	< S. 0:0(0) ack 1 win 5792 <mss 1460,sackOK,TS val 700 ecr 100,nop,wscale 7>
+   +0	> . 1:1(0) ack 1 <nop,nop,TS val 200 ecr 700>
+
+// Now we have 10K of data ready on the socket.
+   +0	< . 1:10001(10000) ack 1 win 514
+   +0	> . 1:1(0) ack 10001 <nop,nop,TS val 200 ecr 700>
+
+// We read 1K and we should have 9K ready to read.
+   +0	recvmsg(3, {msg_name(...)=...,
+		    msg_iov(1)=[{..., 1000}],
+		    msg_flags=0,
+		    msg_control=[{cmsg_level=SOL_TCP,
+				  cmsg_type=TCP_CM_INQ,
+				  cmsg_data=9000}]}, 0) = 1000
+// We read 9K and we should have no further data ready to read.
+   +0	recvmsg(3, {msg_name(...)=...,
+		    msg_iov(1)=[{..., 9000}],
+		    msg_flags=0,
+		    msg_control=[{cmsg_level=SOL_TCP,
+				  cmsg_type=TCP_CM_INQ,
+				  cmsg_data=0}]}, 0) = 9000
+
+// Server sends more data and closes the connections.
+   +0	< F. 10001:20001(10000) ack 1 win 514
+   +0	> . 1:1(0) ack 20002 <nop,nop,TS val 200 ecr 700>
+
+// We read 10K and we should have one "fake" byte because the connection is
+// closed.
+   +0	recvmsg(3, {msg_name(...)=...,
+		    msg_iov(1)=[{..., 10000}],
+		    msg_flags=0,
+		    msg_control=[{cmsg_level=SOL_TCP,
+				  cmsg_type=TCP_CM_INQ,
+				  cmsg_data=1}]}, 0) = 10000
+// Now, receive EOF.
+   +0	read(3, ..., 2000) = 0