diff options
Diffstat (limited to 'test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-client-ts.pkt')
| -rw-r--r-- | test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-client-ts.pkt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-client-ts.pkt b/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-client-ts.pkt new file mode 100644 index 0000000..a8544f5 --- /dev/null +++ b/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-client-ts.pkt @@ -0,0 +1,17 @@ +// Test that getsockopt of TCP_MAXSEG works on active/client TCP connections. +// In this variant we test that a simple query of segment size works, +// in the case where TCP timestamps reduce the usable payload space. + +// Create a socket. +0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 + +0.100...0.200 connect(3, ..., ...) = 0 + +// Establish a connection. +0.100 > S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 6> +0.200 < S. 0:0(0) ack 1 win 32792 <mss 1100,sackOK,TS val 200 ecr 100,nop,wscale 7> +0.200 > . 1:1(0) ack 1 <nop,nop,TS val 200 ecr 200> + +// Verify that the kernel reduced the returned segment size +// to account for TCP timestamps. +0.300 getsockopt(3, SOL_TCP, TCP_MAXSEG, [1088], [4]) = 0 |