diff options
Diffstat (limited to 'test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-server.pkt')
| -rw-r--r-- | test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-server.pkt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-server.pkt b/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-server.pkt new file mode 100644 index 0000000..f2ed31d --- /dev/null +++ b/test/packetdrill/tests/linux/mss/mss-setsockopt-tcp_maxseg-server.pkt @@ -0,0 +1,27 @@ +// Test TCP_MAXSEG works on passive/server TCP connections. + +// Set up a listening socket. +0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0.000 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0.000 bind(3, ..., ...) = 0 +0.000 listen(3, 1) = 0 + +// 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 + +// Establish a connection with an outgoing advertised MSS of 1100. +0.100 < S 0:0(0) win 32792 <mss 1300,nop,wscale 7> +0.100 > S. 0:0(0) ack 1 <mss 1100,nop,wscale 6> +0.200 < . 1:1(0) ack 1 win 257 + +0.300 accept(3, ..., ...) = 4 + +0.400 getsockopt(4, SOL_TCP, TCP_MAXSEG, [1100], [4]) = 0 + +0.500 %{ assert tcpi_advmss == 1100; assert tcpi_snd_mss == 1100 }% + +// IW10 MSS should yield outgoing TSO packet with 10*1100 == 11000 bytes: +0.600 write(4, ..., 12000) = 12000 +0.600 > . 1:11001(11000) ack 1 |