Add support for multi-frame responses (#4)

* first test with multi-frame. storing data in handler. still need to free memory since using malloc.

* hardcode the IsoTpMessage payload size. copy the full multi-frame response into a complete isotpMessage once all frames have been received. otherwise, the returned isotpMessage is not complete.

* remove unnecessary debug statements.

* do not receive multi-frame message if it is larger than the payload buffer size.

* update changelog with multi-frame support

* fix the changelog version for proper semantic versioning. oops.

* move pointer intialization for testing purposes.

* add tests for multi-frame.

* try latest version of check

* fix syntax for version install.

* fix tests. no longer check for malloc pointer (not supported in Travis version of check.h - just test that flow control message has not been sent.

* add IsoTpMessage field for multi_frame. Need this upstream for doing timeout updates.

* add test multi_frame field.

1 files changed, 68 insertions, 0 deletions

diff --git a/tests/test_receive.c b/tests/test_receive.c
index 1452ed3e..3c6a652a 100644
--- a/tests/test_receive.c
+++ b/tests/test_receive.c
@@ -8,6 +8,8 @@
 extern IsoTpShims SHIMS;
 extern IsoTpReceiveHandle RECEIVE_HANDLE;
 
+extern void message_sent(const IsoTpMessage* message, const bool success);
+
 extern uint16_t last_can_frame_sent_arb_id;
 extern uint8_t last_can_payload_sent;
 extern uint8_t last_can_payload_size;
@@ -81,6 +83,70 @@ START_TEST (test_receive_single_frame)
 }
 END_TEST
 
+START_TEST (test_receive_multi_frame)
+{
+    const uint8_t data0[CAN_MESSAGE_BYTE_SIZE] = {0x10, 0x14, 0x49, 0x02, 0x01, 0x31, 0x46, 0x4d};
+    IsoTpMessage message0 = isotp_continue_receive(&SHIMS, &RECEIVE_HANDLE, 0x2a, data0, 8);
+    fail_unless(!RECEIVE_HANDLE.completed);
+    fail_unless(!message0.completed);
+    fail_unless(!message_was_received);
+    fail_unless(message0.multi_frame);
+    //make sure flow control message has been sent.
+    ck_assert_int_eq(last_can_frame_sent_arb_id, 0x2a - 8);
+    ck_assert_int_eq(last_can_payload_sent, 0x30);
+
+    const uint8_t data1[CAN_MESSAGE_BYTE_SIZE] = {0x21, 0x43, 0x55, 0x39, 0x4a, 0x39, 0x34, 0x48};
+    IsoTpMessage message1 = isotp_continue_receive(&SHIMS, &RECEIVE_HANDLE, 0x2a, data1, 8);
+    fail_unless(!RECEIVE_HANDLE.completed);
+    fail_unless(!message1.completed);
+    fail_unless(!message_was_received);
+    fail_unless(message1.multi_frame);
+
+    const uint8_t data2[CAN_MESSAGE_BYTE_SIZE] = {0x22, 0x55, 0x41, 0x30, 0x34, 0x35, 0x32, 0x34};
+    IsoTpMessage message2 = isotp_continue_receive(&SHIMS, &RECEIVE_HANDLE, 0x2a, data2, 8);
+    fail_unless(RECEIVE_HANDLE.completed);
+    fail_unless(message2.completed);
+    fail_unless(message_was_received);
+    fail_unless(message2.multi_frame);
+
+    ck_assert_int_eq(last_message_received_arb_id, 0x2a);
+    ck_assert_int_eq(last_message_received_payload_size, 0x14);
+    ck_assert_int_eq(last_message_received_payload[0], 0x49);
+    ck_assert_int_eq(last_message_received_payload[1], 0x02);
+    ck_assert_int_eq(last_message_received_payload[2], 0x01);
+    ck_assert_int_eq(last_message_received_payload[3], 0x31);
+    ck_assert_int_eq(last_message_received_payload[4], 0x46);
+    ck_assert_int_eq(last_message_received_payload[5], 0x4d);
+    ck_assert_int_eq(last_message_received_payload[6], 0x43);
+    ck_assert_int_eq(last_message_received_payload[7], 0x55);
+    ck_assert_int_eq(last_message_received_payload[8], 0x39);
+    ck_assert_int_eq(last_message_received_payload[9], 0x4a);
+    ck_assert_int_eq(last_message_received_payload[10], 0x39);
+    ck_assert_int_eq(last_message_received_payload[11], 0x34);
+    ck_assert_int_eq(last_message_received_payload[12], 0x48);
+    ck_assert_int_eq(last_message_received_payload[13], 0x55);
+    ck_assert_int_eq(last_message_received_payload[14], 0x41);
+    ck_assert_int_eq(last_message_received_payload[15], 0x30);
+    ck_assert_int_eq(last_message_received_payload[16], 0x34);
+    ck_assert_int_eq(last_message_received_payload[17], 0x35);
+    ck_assert_int_eq(last_message_received_payload[18], 0x32);
+    ck_assert_int_eq(last_message_received_payload[19], 0x34);
+}
+END_TEST
+
+START_TEST (test_receive_large_multi_frame)
+{
+    const uint8_t data0[CAN_MESSAGE_BYTE_SIZE] = {0x11, 0x01, 0x49, 0x02, 0x01, 0x31, 0x46, 0x4d};
+    IsoTpMessage message = isotp_continue_receive(&SHIMS, &RECEIVE_HANDLE, 0x2a, data0, 8);
+    //Make sure we don't try to receive messages that are too large and don't send flow control.
+    fail_unless(!can_frame_was_sent);
+    fail_unless(!RECEIVE_HANDLE.completed);
+    fail_unless(!message.completed);
+    fail_unless(!message_was_received);
+    fail_unless(!message.multi_frame);
+}
+END_TEST
+
 Suite* testSuite(void) {
     Suite* s = suite_create("iso15765");
     TCase *tc_core = tcase_create("receive");
@@ -90,6 +156,8 @@ Suite* testSuite(void) {
     tcase_add_test(tc_core, test_receive_single_frame);
     tcase_add_test(tc_core, test_receive_single_frame_empty_payload);
     tcase_add_test(tc_core, test_receive_empty_can_message);
+    tcase_add_test(tc_core, test_receive_multi_frame);
+    tcase_add_test(tc_core, test_receive_large_multi_frame);
     suite_add_tcase(s, tc_core);
 
     return s;