Introduces a "Fragmentation point is not zero if pmtu is set manually
before connection" test. Reproduces issue described on linux-sctp mailing
list ("sctp: always set frag_point on pmtu change").
Signed-off-by: Jakub Audykowicz <jakub.audykowicz@xxxxxxxxx>
---
src/func_tests/test_fragments.c | 43 ++++++++++++++++++++++++++++++++-
1 file changed, 42 insertions(+), 1 deletion(-)
diff --git a/src/func_tests/test_fragments.c b/src/func_tests/test_fragments.c
index 7feb2b2..3ca381e 100644
--- a/src/func_tests/test_fragments.c
+++ b/src/func_tests/test_fragments.c
@@ -73,7 +73,7 @@ int msg_sizes[] = {1353, 2000, 5000, 10000, 20000, 32768};
int
main(int argc, char *argv[])
{
- int sk1, sk2;
+ int sk1, sk2, sk3;
sockaddr_storage_t loop1;
sockaddr_storage_t loop2;
struct iovec iov;
@@ -93,6 +93,10 @@ main(int argc, char *argv[])
void *msg_buf;
int disable_frag;
socklen_t optlen;
+ struct sctp_paddrparams paddr_params = {0};
+ struct sctp_status status;
+ const char send_msg[] = "hello";
+ char recv_msg[sizeof(send_msg)];
/* Rather than fflush() throughout the code, set stdout to
* be unbuffered.
@@ -292,6 +296,43 @@ main(int argc, char *argv[])
close(sk2);
+ /* Fragmentation point is not zero if pmtu is set manually
+ * before connection
+ */
+ sk1 = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
+ sk2 = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
+ test_bind(sk2, &loop2.sa, sizeof(loop2));
+ test_listen(sk2, 1);
+
+ paddr_params.spp_pathmtu = 1000;
+ paddr_params.spp_flags = SPP_PMTUD_DISABLE;
+ test_setsockopt(sk1, SCTP_PEER_ADDR_PARAMS, &paddr_params,
+ sizeof(struct sctp_paddrparams));
+
+ test_connect(sk1, &loop2.sa, sizeof(loop2));
+ sk3 = test_accept(sk2, NULL, NULL);
+
+ optlen = sizeof(struct sctp_status);
+ test_getsockopt(sk1, SCTP_STATUS, &status, &optlen);
+ if (status.sstat_fragmentation_point == 0)
+ tst_brkm(TBROK, tst_exit,
+ "Fragmentation point is not zero if pmtu is set manually"
+ " - fragmentation point is zero");
+
+ test_send(sk1, &send_msg, sizeof(send_msg), 0);
+ test_recv(sk3, &recv_msg, sizeof(recv_msg), 0);
+
+ if (strcmp(send_msg, recv_msg) != 0)
+ tst_brkm(TBROK, tst_exit,
+ "Fragmentation point is not zero if pmtu is set manually"
+ " - received unexpected message");
+
+ tst_resm(TPASS, "Fragmentation point is not zero if pmtu is set manually");
+
+ close(sk1);
+ close(sk2);
+ close(sk3);
+
/* Indicate successful completion. */
return 0;
}
--
2.17.1
