sockopt-fastopen-key.pkt does not have the non-experimental version, so the Experimental version is converted, FOEXP -> FO. The test sets net.ipv4.tcp_fastopen_key=0-0-0-0 and instead sets another key via setsockopt(TCP_FASTOPEN_KEY). The first listener generates a valid cookie in response to TFO option without cookie, and the second listner creates a TFO socket using the valid cookie. TCP_FASTOPEN_KEY is adjusted to use the common key in default.sh so that we can use TFO_COOKIE and support dualstack. Similarly, TFO_COOKIE_ZERO for the 0-0-0-0 key is defined. Signed-off-by: Kuniyuki Iwashima --- .../selftests/net/packetdrill/ksft_runner.sh | 2 + ...p_fastopen_server_sockopt-fastopen-key.pkt | 74 +++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_sockopt-fastopen-key.pkt diff --git a/tools/testing/selftests/net/packetdrill/ksft_runner.sh b/tools/testing/selftests/net/packetdrill/ksft_runner.sh index cc672bf5f58a..b34e5cf0112e 100755 --- a/tools/testing/selftests/net/packetdrill/ksft_runner.sh +++ b/tools/testing/selftests/net/packetdrill/ksft_runner.sh @@ -10,6 +10,7 @@ declare -A ip_args=( --netmask_ip=255.255.0.0 --remote_ip=192.0.2.1 -D TFO_COOKIE=3021b9d889017eeb + -D TFO_COOKIE_ZERO=b7c12350a90dc8f5 -D CMSG_LEVEL_IP=SOL_IP -D CMSG_TYPE_RECVERR=IP_RECVERR" [ipv6]="--ip_version=ipv6 @@ -18,6 +19,7 @@ declare -A ip_args=( --gateway_ip=fd3d:0a0b:17d6:8888::1 --remote_ip=fd3d:fa7b:d17d::1 -D TFO_COOKIE=c1d1e9742a47a9bc + -D TFO_COOKIE_ZERO=82af1a8f9a205c34 -D CMSG_LEVEL_IP=SOL_IPV6 -D CMSG_TYPE_RECVERR=IPV6_RECVERR" ) diff --git a/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_sockopt-fastopen-key.pkt b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_sockopt-fastopen-key.pkt new file mode 100644 index 000000000000..9f52d7de3436 --- /dev/null +++ b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_sockopt-fastopen-key.pkt @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Test the server cookie is generated by aes64 encoding of remote and local +// IP addresses with a master key specified via sockopt TCP_FASTOPEN_KEY +// +`./defaults.sh + ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen_key=00000000-00000000-00000000-00000000` + + 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + +// Set a key of a1a1a1a1-b2b2b2b2-c3c3c3c3-d4d4d4d4 (big endian). +// This would produce a cookie of TFO_COOKIE like many other +// tests (which the same key but set via sysctl). + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN_KEY, + "\xa1\xa1\xa1\xa1\xb2\xb2\xb2\xb2\xc3\xc3\xc3\xc3\xd4\xd4\xd4\xd4", 16) = 0 + + +0 bind(3, ..., ...) = 0 + +0 listen(3, 1) = 0 + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 + +// Request a valid cookie TFO_COOKIE + +0 < S 1428932:1428942(10) win 10000 + +0 > S. 0:0(0) ack 1428933 + +0 < . 1:1(0) ack 1 win 257 + +0 accept(3, ..., ...) = 4 + +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }% + + +0 close(4) = 0 + +0 > F. 1:1(0) ack 1 + +0 < F. 1:1(0) ack 2 win 257 + +0 > . 2:2(0) ack 2 + + +0 close(3) = 0 + +// Restart the listener + +0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + +0 bind(3, ..., ...) = 0 + +0 listen(3, 1) = 0 + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 + +// Test setting the key in the listen state, and produces an identical cookie + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN_KEY, + "\xa1\xa1\xa1\xa1\xb2\xb2\xb2\xb2\xc3\xc3\xc3\xc3\xd4\xd4\xd4\xd4", 16) = 0 + + +0 < S 6814000:6815000(1000) win 10000 + +0 > S. 0:0(0) ack 6815001 + +0 accept(3, ..., ...) = 4 + +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }% + +0 < . 1001:1001(0) ack 1 win 257 + +0 read(4, ..., 8192) = 1000 + + +0 close(4) = 0 + +0 > F. 1:1(0) ack 1001 + +0 < F. 1001:1001(0) ack 2 win 257 + +0 > . 2:2(0) ack 1002 + + +0 close(3) = 0 + +// Restart the listener + +0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + +0 bind(3, ..., ...) = 0 + +0 listen(3, 1) = 0 + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 + +// Test invalid key length (must be 16 bytes) + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN_KEY, "", 0) = -1 (Invalid Argument) + +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN_KEY, "", 3) = -1 (Invalid Argument) + +// Previous cookie won't be accepted b/c this listener uses the global key (0-0-0-0) + +0 < S 6814000:6815000(1000) win 10000 + +0 > S. 0:0(0) ack 6814001 -- 2.51.0.536.g15c5d4f767-goog