diff options
Diffstat (limited to 'test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-client.pkt')
| -rw-r--r-- | test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-client.pkt | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-client.pkt b/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-client.pkt new file mode 100644 index 0000000..906ad6e --- /dev/null +++ b/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-client.pkt @@ -0,0 +1,24 @@ +// Test TCP_MAXSEG works on active/client TCP connections. + +// Create a socket. +0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 + +// Set MSS to 1100. +0.010 setsockopt(3, SOL_TCP, TCP_MAXSEG, [1100], 4) = 0 +// TODO(ncardwell): the following is silly; should we fix it? +0.020 getsockopt(3, SOL_TCP, TCP_MAXSEG, [536], [4]) = 0 + +0.100...0.200 connect(3, ..., ...) = 0 + +// Establish a connection with an outgoing advertised MSS of 1100. +0.100 > S 0:0(0) <mss 1100,sackOK,TS val 100 ecr 0,nop,wscale 6> +0.200 < S. 0:0(0) ack 1 win 32792 <mss 1460,nop,wscale 7> +0.200 > . 1:1(0) ack 1 + +0.300 getsockopt(3, SOL_TCP, TCP_MAXSEG, [1100], [4]) = 0 + +0.400 %{ assert tcpi_advmss == 1100; assert tcpi_snd_mss == 1100 }% + +// IW10 MSS should yield outgoing TSO packet with 10*1100 == 11000 bytes: +0.500 write(3, ..., 12000) = 12000 +0.500 > . 1:11001(11000) ack 1 |