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// 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 <mss 1012,nop,nop,FO,sackOK,TS val 1 ecr 0,nop,wscale 7>
+0 > S. 0:0(0) ack 1428933 <mss 1460,sackOK,TS val 10000 ecr 1,nop,wscale 8,FO TFO_COOKIE,nop,nop>
+0 < . 1:1(0) ack 1 win 257 <nop,nop,TS val 2 ecr 10000>
+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 <nop,nop,TS val 10001 ecr 2>
+0 < F. 1:1(0) ack 2 win 257 <nop,nop,TS val 3 ecr 10001>
+0 > . 2:2(0) ack 2 <nop,nop,TS val 10002 ecr 3>
+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 <mss 1012,nop,nop,FO TFO_COOKIE,sackOK,TS val 10 ecr 0,nop,wscale 7>
+0 > S. 0:0(0) ack 6815001 <mss 1460,sackOK,TS val 10000 ecr 10,nop,wscale 8>
+0 accept(3, ..., ...) = 4
+0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }%
+0 < . 1001:1001(0) ack 1 win 257 <nop,nop,TS val 12 ecr 10000>
+0 read(4, ..., 8192) = 1000
+0 close(4) = 0
+0 > F. 1:1(0) ack 1001 <nop,nop,TS val 10101 ecr 12>
+0 < F. 1001:1001(0) ack 2 win 257 <nop,nop,TS val 112 ecr 10101>
+0 > . 2:2(0) ack 1002 <nop,nop,TS val 10102 ecr 112>
+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 <mss 1012,nop,nop,FO TFO_COOKIE,sackOK,TS val 10 ecr 0,nop,wscale 7>
+0 > S. 0:0(0) ack 6814001 <mss 1460,sackOK,TS val 10000 ecr 10,nop,wscale 8,FO TFO_COOKIE_ZERO,nop,nop>
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