Release 2.20.0

- [FEATURE] QUIC and HTTP/3 Internet Draft 30 support.
- [FEATURE] Unreliable Datagram Extension support.
- [FEATURE] Adaptive congestion controller.
- [BUGFIX] Do not send MAX_STREAM_DATA frames on crypto streams.
- [BUGFIX] Fail with CRYPTO_BUFFER_EXCEEDED when too much CRYPTO
  data comes in.
- [BUFFIX] Spin bit is now strictly per path; value is reset on
  DCID change.
- [BUGFIX] Check that max value of max_streams_uni and
  max_streams_bidi TPs is 2^60.
- [BUGFIX] Close IETF mini conn immediately if crypto session
  cannot be initialized.
- Deprecate ID-28 (no browser uses it): it's no longer in the
  default versions list.
- New programs duck_server and duck_client that implement the
  experimental siduck-00 protocol.  They quack!
- IETF crypto streams: don't limit ourselves from sending.
- Command-line programs: turn off QL loss bits if -G is used, as
  Wireshark cannot decrypt QUIC packets when this extension is used.
- Turn all h3 framing unit tests back on.
- Fix malo initialization when compiled in no-pool mode.

bin/duck_server.c

@@ -0,0 +1,160 @@
+/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc.  See LICENSE. */
+/*
+ * A duck quacks!  The server for the siduck protocol:
+ *      https://tools.ietf.org/html/draft-pardue-quic-siduck-00
+ */
+
+#include <assert.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <time.h>
+#ifndef WIN32
+#include <unistd.h>
+#include <netinet/in.h>
+#else
+#include "vc_compat.h"
+#include "getopt.h"
+#endif
+
+#include "lsquic.h"
+#include "../src/liblsquic/lsquic_hash.h"
+#include "test_common.h"
+#include "test_cert.h"
+#include "prog.h"
+
+#include "../src/liblsquic/lsquic_logger.h"
+
+
+static lsquic_conn_ctx_t *
+duck_server_on_new_conn (void *stream_if_ctx, lsquic_conn_t *conn)
+{
+    LSQ_NOTICE("New siduck connection established!");
+    return NULL;
+}
+
+
+static void
+duck_server_on_conn_closed (lsquic_conn_t *conn)
+{
+    LSQ_NOTICE("siduck connection closed");
+}
+
+
+/* Expected request and response of the siduck protocol */
+#define REQUEST "quack"
+#define RESPONSE "quack-ack"
+
+
+static ssize_t
+duck_on_dg_write (lsquic_conn_t *conn, void *buf, size_t sz)
+{
+    int s;
+
+    /* We only write one response */
+    s = lsquic_conn_want_datagram_write(conn, 0);
+    assert(s == 1);     /* Old value was "yes" */
+
+    if (sz >= sizeof(RESPONSE) - 1)
+    {
+        LSQ_INFO("wrote `%s' in response", RESPONSE);
+        memcpy(buf, RESPONSE, sizeof(RESPONSE) - 1);
+        lsquic_conn_close(conn);    /* Close connection right away */
+        return sizeof(RESPONSE) - 1;
+    }
+    else
+        return -1;
+}
+
+
+static void
+duck_on_datagram (lsquic_conn_t *conn, const void *buf, size_t bufsz)
+{
+    int s;
+
+    if (bufsz == sizeof(REQUEST) - 1
+            && 0 == memcmp(buf, REQUEST, sizeof(REQUEST) - 1))
+    {
+        LSQ_DEBUG("received the expected `%s' request", REQUEST);
+        s = lsquic_conn_want_datagram_write(conn, 1);
+        assert(s == 0);
+    }
+    else
+    {
+        LSQ_NOTICE("unexpected request received, abort connection");
+        lsquic_conn_abort(conn);
+    }
+}
+
+
+const struct lsquic_stream_if duck_server_stream_if = {
+    .on_new_conn            = duck_server_on_new_conn,
+    .on_conn_closed         = duck_server_on_conn_closed,
+    .on_dg_write            = duck_on_dg_write,
+    .on_datagram            = duck_on_datagram,
+};
+
+
+static void
+usage (const char *prog)
+{
+    const char *const slash = strrchr(prog, '/');
+    if (slash)
+        prog = slash + 1;
+    printf(
+"Usage: %s [opts]\n"
+"\n"
+"Options:\n"
+                , prog);
+}
+
+
+int
+main (int argc, char **argv)
+{
+    int opt, s;
+    struct prog prog;
+    struct sport_head sports;
+
+    TAILQ_INIT(&sports);
+    prog_init(&prog, LSENG_SERVER, &sports, &duck_server_stream_if, NULL);
+    prog.prog_settings.es_datagrams = 1;
+    prog.prog_settings.es_init_max_data = 0;
+    prog.prog_settings.es_init_max_streams_bidi = 0;
+    prog.prog_settings.es_init_max_streams_uni = 0;
+    prog.prog_settings.es_max_streams_in = 0;
+
+    while (-1 != (opt = getopt(argc, argv, PROG_OPTS "h")))
+    {
+        switch (opt) {
+        case 'h':
+            usage(argv[0]);
+            prog_print_common_options(&prog, stdout);
+            exit(0);
+        default:
+            if (0 != prog_set_opt(&prog, opt, optarg))
+                exit(1);
+        }
+    }
+
+    if (0 != add_alpn("siduck-00"))
+    {
+        LSQ_ERROR("could not add ALPN");
+        exit(EXIT_FAILURE);
+    }
+
+    if (0 != prog_prep(&prog))
+    {
+        LSQ_ERROR("could not prep");
+        exit(EXIT_FAILURE);
+    }
+
+    LSQ_DEBUG("entering event loop");
+
+    s = prog_run(&prog);
+    prog_cleanup(&prog);
+
+    exit(0 == s ? EXIT_SUCCESS : EXIT_FAILURE);
+}