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DTLS: Refine retransmit between ClientHello and Certificate.

Browse Source
pull/2257/head
winlin 4 years ago
parent 02aac0fea4
commit 62987aa01f
2 changed files with 71 additions and 203 deletions
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35
trunk/src/app/srs_app_rtc_dtls.cpp
Unescape Escape View File

@ -68,7 +68,7 @@ unsigned int dtls_timer_cb(SSL* dtls, unsigned int previous_us)
// Never exceed the max timeout.
timeout_us = srs_min(timeout_us, 30 * 1000 * 1000); // in us
srs_info("DTLS: ARQ timer cb timeout=%ums, previous=%ums", timeout_us, previous_us);
srs_info("DTLS: ARQ timer cb timeout=%ums, previous=%ums", timeout_us/1000, previous_us/1000);
return timeout_us;
}
@ -503,7 +503,7 @@ srs_error_t SrsDtlsImpl::do_on_dtls(char* data, int nb_data)
// When already done, only for us, we still got message from client,
// it might be our response is lost, or application data.
if (handshake_done_for_us) {
srs_trace("DTLS: After done, got %d bytes", nb_data);
srs_info("DTLS: After done, got %d bytes", nb_data);
}
int r0 = 0;
@ -553,7 +553,7 @@ srs_error_t SrsDtlsImpl::do_on_dtls(char* data, int nb_data)
int size = BIO_get_mem_data(bio_out, (char**)&data);
// Logging when got SSL original data.
state_trace((uint8_t*)data, size, true, r0, r1, false);
state_trace((uint8_t*)data, size, false, r0, r1, false);
if (size > 0 && (err = callback_->write_dtls_data(data, size)) != srs_success) {
return srs_error_wrap(err, "dtls send size=%u, data=[%s]", size,
@ -578,6 +578,12 @@ srs_error_t SrsDtlsImpl::do_handshake()
{
srs_error_t err = srs_success;
// Done for use, ignore handshake packets. If need to ARQ the handshake packets,
// we should use SSL_read to handle it.
if (handshake_done_for_us) {
return err;
}
// Do handshake and get the result.
int r0 = SSL_do_handshake(dtls);
int r1 = SSL_get_error(dtls, r0);
@ -690,7 +696,7 @@ SrsDtlsClientImpl::SrsDtlsClientImpl(ISrsDtlsCallback* callback) : SrsDtlsImpl(c
state_ = SrsDtlsStateInit;
// the max dtls retry num is 12 in openssl.
arq_max_retry = 12 * 2; // ARQ for ClientHello and Certificate.
arq_max_retry = 12 * 2; // Max ARQ limit shared for ClientHello and Certificate.
reset_timer_ = true;
}
@ -745,15 +751,17 @@ srs_error_t SrsDtlsClientImpl::on_final_out_data(uint8_t* data, int size)
// If we are sending client hello, change from init to new state.
if (state_ == SrsDtlsStateInit && size > 14 && data[0] == 22 && data[13] == 1) {
state_ = SrsDtlsStateClientHello;
return err;
}
// If we are sending certificate, change from SrsDtlsStateServerHello to new state.
if (state_ == SrsDtlsStateServerHello && size > 14 && data[0] == 22 && data[13] == 11) {
// If we are sending certificate, change from SrsDtlsStateClientHello to new state.
if (state_ == SrsDtlsStateClientHello && size > 14 && data[0] == 22 && data[13] == 11) {
state_ = SrsDtlsStateClientCertificate;
// When we send out the certificate, we should reset the timer.
reset_timer_ = true;
srs_info("DTLS: Reset the timer for ServerHello");
return err;
}
return err;
@ -850,11 +858,13 @@ srs_error_t SrsDtlsClientImpl::cycle()
// There is timeout to wait, so we should wait, because there is no packet in openssl.
if (timeout > 0) {
// Note that if we use very small timeout, say 10ms, the client might got two ClientHello,
// then it confused and send HelloVerifyRequest(3) to check it, this is not the efficiency
// way, so we limit the min timeout here to make it faster.
// TODO: FIXME: Config it.
srs_usleep(srs_max(50 * SRS_UTIME_MILLISECONDS, timeout));
// Never wait too long, because we might need to retransmit other messages.
// For example, we have transmit 2 ClientHello as [50ms, 100ms] then we sleep(200ms),
// during this we reset the openssl timer to 50ms and need to retransmit Certificate,
// we still need to wait 200ms not 50ms.
timeout = srs_min(100 * SRS_UTIME_MILLISECONDS, timeout);
timeout = srs_max(50 * SRS_UTIME_MILLISECONDS, timeout);
srs_usleep(timeout);
continue;
}
@ -869,6 +879,9 @@ srs_error_t SrsDtlsClientImpl::cycle()
// messages and returns 1. If too many timeouts had expired without progress or an error
// occurs, it returns -1.
r0 = DTLSv1_handle_timeout(dtls); r1 = SSL_get_error(dtls, r0);
if (r0 == 0) {
continue; // No timeout had expired.
}
if (r0 != 1) {
return srs_error_new(ERROR_RTC_DTLS, "ARQ r0=%d, r1=%d", r0, r1);
}

239
trunk/src/utest/srs_utest_rtc.cpp
Unescape Escape View File

@ -871,9 +871,12 @@ srs_error_t MockDtlsCallback::cycle()
}
// Wait for mock io to done, try to switch to coroutine many times.
void mock_wait_dtls_io_done(int count = 100, int interval = 0)
void mock_wait_dtls_io_done(SrsDtlsImpl* client_impl, int count = 100, int interval = 0)
{
for (int i = 0; i < count; i++) {
if (client_impl) {
dynamic_cast<SrsDtlsClientImpl*>(client_impl)->reset_timer_ = true;
}
srs_usleep(interval * SRS_UTIME_MILLISECONDS);
}
}
@ -895,138 +898,6 @@ public:
}
};
VOID TEST(KernelRTCTest, DTLSARQLimitTest)
{
srs_error_t err = srs_success;
// ClientHello lost, client retransmit the ClientHello.
if (true) {
MockDtlsCallback cio; SrsDtls client(&cio);
MockDtlsCallback sio; SrsDtls server(&sio);
MockBridgeDtlsIO b0(&cio, &server, NULL); MockBridgeDtlsIO b1(&sio, &client, NULL);
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 10 packets, total packets should be 9(max to 9).
// Note that only one server hello.
cio.nn_client_hello_lost = 10;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
EXPECT_FALSE(cio.done);
EXPECT_FALSE(sio.done);
EXPECT_EQ(9, cio.nn_client_hello);
EXPECT_EQ(0, sio.nn_server_hello);
EXPECT_EQ(0, cio.nn_certificate);
EXPECT_EQ(0, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
// Certificate lost, client retransmit the Certificate.
if (true) {
MockDtlsCallback cio; SrsDtls client(&cio);
MockDtlsCallback sio; SrsDtls server(&sio);
MockBridgeDtlsIO b0(&cio, &server, NULL); MockBridgeDtlsIO b1(&sio, &client, NULL);
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 10 packets, total packets should be 9(max to 9).
// Note that only one server NewSessionTicket.
cio.nn_certificate_lost = 10;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
EXPECT_FALSE(cio.done);
EXPECT_FALSE(sio.done);
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_EQ(9, cio.nn_certificate);
EXPECT_EQ(0, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
// ServerHello lost, client retransmit the ClientHello.
if (true) {
MockDtlsCallback cio; SrsDtls client(&cio);
MockDtlsCallback sio; SrsDtls server(&sio);
MockBridgeDtlsIO b0(&cio, &server, NULL); MockBridgeDtlsIO b1(&sio, &client, NULL);
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 10 packets, total packets should be 9(max to 9).
sio.nn_server_hello_lost = 10;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
EXPECT_FALSE(cio.done);
EXPECT_FALSE(sio.done);
EXPECT_EQ(9, cio.nn_client_hello);
EXPECT_EQ(9, sio.nn_server_hello);
EXPECT_EQ(0, cio.nn_certificate);
EXPECT_EQ(0, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
// NewSessionTicket lost, client retransmit the Certificate.
if (true) {
MockDtlsCallback cio; SrsDtls client(&cio);
MockDtlsCallback sio; SrsDtls server(&sio);
MockBridgeDtlsIO b0(&cio, &server, NULL); MockBridgeDtlsIO b1(&sio, &client, NULL);
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 10 packets, total packets should be 9(max to 9).
sio.nn_new_session_lost = 10;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
// Although the packet is lost, but it's done for server, and not done for client.
EXPECT_FALSE(cio.done);
EXPECT_TRUE(sio.done);
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_EQ(9, cio.nn_certificate);
EXPECT_EQ(9, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
}
VOID TEST(KernelRTCTest, DTLSClientARQTest)
{
srs_error_t err = srs_success;
@ -1040,7 +911,7 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(30, 1);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1050,8 +921,8 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_TRUE(1 <= cio.nn_certificate);
EXPECT_TRUE(1 <= sio.nn_new_session);
EXPECT_EQ(1, cio.nn_certificate);
EXPECT_EQ(1, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
@ -1063,16 +934,12 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 2 packets, total packets should be 3.
// Note that only one server hello.
cio.nn_client_hello_lost = 2;
cio.nn_client_hello_lost = 1;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1080,10 +947,10 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
EXPECT_TRUE(cio.done);
EXPECT_TRUE(sio.done);
EXPECT_TRUE(3 <= cio.nn_client_hello);
EXPECT_TRUE(1 <= sio.nn_server_hello);
EXPECT_TRUE(1 <= cio.nn_certificate);
EXPECT_TRUE(1 <= sio.nn_new_session);
EXPECT_EQ(2, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_EQ(1, cio.nn_certificate);
EXPECT_EQ(1, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
@ -1095,16 +962,12 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 2 packets, total packets should be 3.
// Note that only one server NewSessionTicket.
cio.nn_certificate_lost = 2;
cio.nn_certificate_lost = 1;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1113,9 +976,9 @@ VOID TEST(KernelRTCTest, DTLSClientARQTest)
EXPECT_TRUE(sio.done);
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_TRUE(3 <= cio.nn_certificate);
EXPECT_TRUE(1 <= sio.nn_new_session);
EXPECT_EQ(2, sio.nn_server_hello);
EXPECT_EQ(2, cio.nn_certificate);
EXPECT_EQ(0, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
}
@ -1133,7 +996,7 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(30, 1);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1143,8 +1006,8 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_TRUE(1 <= cio.nn_certificate);
EXPECT_TRUE(1 <= sio.nn_new_session);
EXPECT_EQ(1, cio.nn_certificate);
EXPECT_EQ(1, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
@ -1156,15 +1019,11 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 2 packets, total packets should be 3.
sio.nn_server_hello_lost = 2;
sio.nn_server_hello_lost = 1;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1172,10 +1031,10 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
EXPECT_TRUE(cio.done);
EXPECT_TRUE(sio.done);
EXPECT_EQ(3, cio.nn_client_hello);
EXPECT_EQ(3, sio.nn_server_hello);
EXPECT_TRUE(1 <= cio.nn_certificate);
EXPECT_TRUE(1 <= sio.nn_new_session);
EXPECT_EQ(2, cio.nn_client_hello);
EXPECT_EQ(2, sio.nn_server_hello);
EXPECT_EQ(1, cio.nn_certificate);
EXPECT_EQ(1, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
@ -1187,15 +1046,11 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
HELPER_EXPECT_SUCCESS(client.initialize("active", "dtls1.0"));
HELPER_EXPECT_SUCCESS(server.initialize("passive", "dtls1.0"));
// Use very short interval for utest.
dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_interval = 1 * SRS_UTIME_MILLISECONDS;
HELPER_ARRAY_INIT(dynamic_cast<SrsDtlsClientImpl*>(client.impl)->arq_to_ratios, 8, 1);
// Lost 2 packets, total packets should be 3.
sio.nn_new_session_lost = 2;
sio.nn_new_session_lost = 1;
HELPER_EXPECT_SUCCESS(client.start_active_handshake());
mock_wait_dtls_io_done(10, 3);
mock_wait_dtls_io_done(client.impl, 15, 5);
EXPECT_TRUE(sio.r0 == srs_success);
EXPECT_TRUE(cio.r0 == srs_success);
@ -1205,8 +1060,8 @@ VOID TEST(KernelRTCTest, DTLSServerARQTest)
EXPECT_EQ(1, cio.nn_client_hello);
EXPECT_EQ(1, sio.nn_server_hello);
EXPECT_EQ(3, cio.nn_certificate);
EXPECT_EQ(3, sio.nn_new_session);
EXPECT_EQ(2, cio.nn_certificate);
EXPECT_EQ(2, sio.nn_new_session);
EXPECT_EQ(0, sio.nn_change_cipher);
}
}
@ -1250,10 +1105,10 @@ VOID TEST(KernelRTCTest, DTLSClientFlowTest)
{4, "auto", "dtls1.0", true, true, false, false},
// OK, Client: DTLS auto(v1.0 or v1.2), Server: DTLS v1.0
{5, "auto", "dtls1.2", true, true, false, false},
// Fail, Client: DTLS v1.0, Server: DTLS v1.2
{6, "dtls1.0", "dtls1.2", false, false, false, true},
// Fail, Client: DTLS v1.2, Server: DTLS v1.0
{7, "dtls1.2", "dtls1.0", false, false, true, false},
// OK?, Client: DTLS v1.0, Server: DTLS v1.2
{6, "dtls1.0", "dtls1.2", true, true, false, false},
// OK?, Client: DTLS v1.2, Server: DTLS v1.0
{7, "dtls1.2", "dtls1.0", true, true, false, false},
};
for (int i = 0; i < (int)(sizeof(cases) / sizeof(DTLSFlowCase)); i++) {
@ -1266,14 +1121,14 @@ VOID TEST(KernelRTCTest, DTLSClientFlowTest)
HELPER_EXPECT_SUCCESS(server.initialize("passive", c.ServerVersion)) << c;
HELPER_EXPECT_SUCCESS(client.start_active_handshake()) << c;
mock_wait_dtls_io_done();
mock_wait_dtls_io_done(client.impl, 15, 5);
// Note that the cio error is generated from server, vice versa.
EXPECT_EQ(c.ClientError, sio.r0 != srs_success) << c;
EXPECT_EQ(c.ServerError, cio.r0 != srs_success) << c;
EXPECT_EQ(c.ClientDone, cio.done) << c;
EXPECT_EQ(c.ServerDone, sio.done) << c;
EXPECT_EQ(c.ClientError, sio.r0 != srs_success) << c;
EXPECT_EQ(c.ServerError, cio.r0 != srs_success) << c;
}
}
@ -1294,10 +1149,10 @@ VOID TEST(KernelRTCTest, DTLSServerFlowTest)
{4, "auto", "dtls1.0", true, true, false, false},
// OK, Client: DTLS auto(v1.0 or v1.2), Server: DTLS v1.0
{5, "auto", "dtls1.2", true, true, false, false},
// Fail, Client: DTLS v1.0, Server: DTLS v1.2
{6, "dtls1.0", "dtls1.2", false, false, false, true},
// Fail, Client: DTLS v1.2, Server: DTLS v1.0
{7, "dtls1.2", "dtls1.0", false, false, true, false},
// OK?, Client: DTLS v1.0, Server: DTLS v1.2
{6, "dtls1.0", "dtls1.2", true, true, false, false},
// OK?, Client: DTLS v1.2, Server: DTLS v1.0
{7, "dtls1.2", "dtls1.0", true, true, false, false},
};
for (int i = 0; i < (int)(sizeof(cases) / sizeof(DTLSFlowCase)); i++) {
@ -1310,14 +1165,14 @@ VOID TEST(KernelRTCTest, DTLSServerFlowTest)
HELPER_EXPECT_SUCCESS(server.initialize("passive", c.ServerVersion)) << c;
HELPER_EXPECT_SUCCESS(client.start_active_handshake()) << c;
mock_wait_dtls_io_done();
mock_wait_dtls_io_done(NULL, 15, 5);
// Note that the cio error is generated from server, vice versa.
EXPECT_EQ(c.ClientError, sio.r0 != srs_success) << c;
EXPECT_EQ(c.ServerError, cio.r0 != srs_success) << c;
EXPECT_EQ(c.ClientDone, cio.done) << c;
EXPECT_EQ(c.ServerDone, sio.done) << c;
EXPECT_EQ(c.ClientError, sio.r0 != srs_success) << c;
EXPECT_EQ(c.ServerError, cio.r0 != srs_success) << c;
}
}

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