selftests: tls: add test for peeking past a record of a different type

If we queue 3 records:
 - record 1, type DATA
 - record 2, some other type
 - record 3, type DATA
the current code can look past the 2nd record and merge the 2 data
records.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/4623550f8617c239581030c13402d3262f2bd14f.1708007371.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 2714c23..b95c249 100644 (file)
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -1511,6 +1511,25 @@ TEST_F(tls, control_msg_nomerge)
        EXPECT_EQ(memcmp(buf, rec2, send_len), 0);
 }
 
+TEST_F(tls, data_control_data)
+{
+       char *rec1 = "1111";
+       char *rec2 = "2222";
+       char *rec3 = "3333";
+       int send_len = 5;
+       char buf[15];
+
+       if (self->notls)
+               SKIP(return, "no TLS support");
+
+       EXPECT_EQ(send(self->fd, rec1, send_len, 0), send_len);
+       EXPECT_EQ(tls_send_cmsg(self->fd, 100, rec2, send_len, 0), send_len);
+       EXPECT_EQ(send(self->fd, rec3, send_len, 0), send_len);
+
+       EXPECT_EQ(recv(self->cfd, buf, sizeof(buf), MSG_PEEK), send_len);
+       EXPECT_EQ(recv(self->cfd, buf, sizeof(buf), MSG_PEEK), send_len);
+}
+
 TEST_F(tls, shutdown)
 {
        char const *test_str = "test_read";