diff --git a/ap/lib/libssl/openssl-1.1.1o/test/ssltestlib.c b/ap/lib/libssl/openssl-1.1.1o/test/ssltestlib.c
new file mode 100644
index 0000000..456afdf
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/test/ssltestlib.c
@@ -0,0 +1,944 @@
+/*
+ * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+
+#include "internal/nelem.h"
+#include "ssltestlib.h"
+#include "testutil.h"
+#include "e_os.h"
+
+#ifdef OPENSSL_SYS_UNIX
+# include <unistd.h>
+
+static ossl_inline void ossl_sleep(unsigned int millis)
+{
+# ifdef OPENSSL_SYS_VXWORKS
+    struct timespec ts;
+    ts.tv_sec = (long int) (millis / 1000);
+    ts.tv_nsec = (long int) (millis % 1000) * 1000000ul;
+    nanosleep(&ts, NULL);
+# else
+    usleep(millis * 1000);
+# endif
+}
+#elif defined(_WIN32)
+# include <windows.h>
+
+static ossl_inline void ossl_sleep(unsigned int millis)
+{
+    Sleep(millis);
+}
+#else
+/* Fallback to a busy wait */
+static ossl_inline void ossl_sleep(unsigned int millis)
+{
+    struct timeval start, now;
+    unsigned int elapsedms;
+
+    gettimeofday(&start, NULL);
+    do {
+        gettimeofday(&now, NULL);
+        elapsedms = (((now.tv_sec - start.tv_sec) * 1000000)
+                     + now.tv_usec - start.tv_usec) / 1000;
+    } while (elapsedms < millis);
+}
+#endif
+
+static int tls_dump_new(BIO *bi);
+static int tls_dump_free(BIO *a);
+static int tls_dump_read(BIO *b, char *out, int outl);
+static int tls_dump_write(BIO *b, const char *in, int inl);
+static long tls_dump_ctrl(BIO *b, int cmd, long num, void *ptr);
+static int tls_dump_gets(BIO *bp, char *buf, int size);
+static int tls_dump_puts(BIO *bp, const char *str);
+
+/* Choose a sufficiently large type likely to be unused for this custom BIO */
+#define BIO_TYPE_TLS_DUMP_FILTER  (0x80 | BIO_TYPE_FILTER)
+#define BIO_TYPE_MEMPACKET_TEST    0x81
+#define BIO_TYPE_ALWAYS_RETRY      0x82
+
+static BIO_METHOD *method_tls_dump = NULL;
+static BIO_METHOD *meth_mem = NULL;
+static BIO_METHOD *meth_always_retry = NULL;
+
+/* Note: Not thread safe! */
+const BIO_METHOD *bio_f_tls_dump_filter(void)
+{
+    if (method_tls_dump == NULL) {
+        method_tls_dump = BIO_meth_new(BIO_TYPE_TLS_DUMP_FILTER,
+                                        "TLS dump filter");
+        if (   method_tls_dump == NULL
+            || !BIO_meth_set_write(method_tls_dump, tls_dump_write)
+            || !BIO_meth_set_read(method_tls_dump, tls_dump_read)
+            || !BIO_meth_set_puts(method_tls_dump, tls_dump_puts)
+            || !BIO_meth_set_gets(method_tls_dump, tls_dump_gets)
+            || !BIO_meth_set_ctrl(method_tls_dump, tls_dump_ctrl)
+            || !BIO_meth_set_create(method_tls_dump, tls_dump_new)
+            || !BIO_meth_set_destroy(method_tls_dump, tls_dump_free))
+            return NULL;
+    }
+    return method_tls_dump;
+}
+
+void bio_f_tls_dump_filter_free(void)
+{
+    BIO_meth_free(method_tls_dump);
+}
+
+static int tls_dump_new(BIO *bio)
+{
+    BIO_set_init(bio, 1);
+    return 1;
+}
+
+static int tls_dump_free(BIO *bio)
+{
+    BIO_set_init(bio, 0);
+
+    return 1;
+}
+
+static void copy_flags(BIO *bio)
+{
+    int flags;
+    BIO *next = BIO_next(bio);
+
+    flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
+    BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
+    BIO_set_flags(bio, flags);
+}
+
+#define RECORD_CONTENT_TYPE     0
+#define RECORD_VERSION_HI       1
+#define RECORD_VERSION_LO       2
+#define RECORD_EPOCH_HI         3
+#define RECORD_EPOCH_LO         4
+#define RECORD_SEQUENCE_START   5
+#define RECORD_SEQUENCE_END     10
+#define RECORD_LEN_HI           11
+#define RECORD_LEN_LO           12
+
+#define MSG_TYPE                0
+#define MSG_LEN_HI              1
+#define MSG_LEN_MID             2
+#define MSG_LEN_LO              3
+#define MSG_SEQ_HI              4
+#define MSG_SEQ_LO              5
+#define MSG_FRAG_OFF_HI         6
+#define MSG_FRAG_OFF_MID        7
+#define MSG_FRAG_OFF_LO         8
+#define MSG_FRAG_LEN_HI         9
+#define MSG_FRAG_LEN_MID        10
+#define MSG_FRAG_LEN_LO         11
+
+
+static void dump_data(const char *data, int len)
+{
+    int rem, i, content, reclen, msglen, fragoff, fraglen, epoch;
+    unsigned char *rec;
+
+    printf("---- START OF PACKET ----\n");
+
+    rem = len;
+    rec = (unsigned char *)data;
+
+    while (rem > 0) {
+        if (rem != len)
+            printf("*\n");
+        printf("*---- START OF RECORD ----\n");
+        if (rem < DTLS1_RT_HEADER_LENGTH) {
+            printf("*---- RECORD TRUNCATED ----\n");
+            break;
+        }
+        content = rec[RECORD_CONTENT_TYPE];
+        printf("** Record Content-type: %d\n", content);
+        printf("** Record Version: %02x%02x\n",
+               rec[RECORD_VERSION_HI], rec[RECORD_VERSION_LO]);
+        epoch = (rec[RECORD_EPOCH_HI] << 8) | rec[RECORD_EPOCH_LO];
+        printf("** Record Epoch: %d\n", epoch);
+        printf("** Record Sequence: ");
+        for (i = RECORD_SEQUENCE_START; i <= RECORD_SEQUENCE_END; i++)
+            printf("%02x", rec[i]);
+        reclen = (rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO];
+        printf("\n** Record Length: %d\n", reclen);
+
+        /* Now look at message */
+        rec += DTLS1_RT_HEADER_LENGTH;
+        rem -= DTLS1_RT_HEADER_LENGTH;
+        if (content == SSL3_RT_HANDSHAKE) {
+            printf("**---- START OF HANDSHAKE MESSAGE FRAGMENT ----\n");
+            if (epoch > 0) {
+                printf("**---- HANDSHAKE MESSAGE FRAGMENT ENCRYPTED ----\n");
+            } else if (rem < DTLS1_HM_HEADER_LENGTH
+                    || reclen < DTLS1_HM_HEADER_LENGTH) {
+                printf("**---- HANDSHAKE MESSAGE FRAGMENT TRUNCATED ----\n");
+            } else {
+                printf("*** Message Type: %d\n", rec[MSG_TYPE]);
+                msglen = (rec[MSG_LEN_HI] << 16) | (rec[MSG_LEN_MID] << 8)
+                         | rec[MSG_LEN_LO];
+                printf("*** Message Length: %d\n", msglen);
+                printf("*** Message sequence: %d\n",
+                       (rec[MSG_SEQ_HI] << 8) | rec[MSG_SEQ_LO]);
+                fragoff = (rec[MSG_FRAG_OFF_HI] << 16)
+                          | (rec[MSG_FRAG_OFF_MID] << 8)
+                          | rec[MSG_FRAG_OFF_LO];
+                printf("*** Message Fragment offset: %d\n", fragoff);
+                fraglen = (rec[MSG_FRAG_LEN_HI] << 16)
+                          | (rec[MSG_FRAG_LEN_MID] << 8)
+                          | rec[MSG_FRAG_LEN_LO];
+                printf("*** Message Fragment len: %d\n", fraglen);
+                if (fragoff + fraglen > msglen)
+                    printf("***---- HANDSHAKE MESSAGE FRAGMENT INVALID ----\n");
+                else if (reclen < fraglen)
+                    printf("**---- HANDSHAKE MESSAGE FRAGMENT TRUNCATED ----\n");
+                else
+                    printf("**---- END OF HANDSHAKE MESSAGE FRAGMENT ----\n");
+            }
+        }
+        if (rem < reclen) {
+            printf("*---- RECORD TRUNCATED ----\n");
+            rem = 0;
+        } else {
+            rec += reclen;
+            rem -= reclen;
+            printf("*---- END OF RECORD ----\n");
+        }
+    }
+    printf("---- END OF PACKET ----\n\n");
+    fflush(stdout);
+}
+
+static int tls_dump_read(BIO *bio, char *out, int outl)
+{
+    int ret;
+    BIO *next = BIO_next(bio);
+
+    ret = BIO_read(next, out, outl);
+    copy_flags(bio);
+
+    if (ret > 0) {
+        dump_data(out, ret);
+    }
+
+    return ret;
+}
+
+static int tls_dump_write(BIO *bio, const char *in, int inl)
+{
+    int ret;
+    BIO *next = BIO_next(bio);
+
+    ret = BIO_write(next, in, inl);
+    copy_flags(bio);
+
+    return ret;
+}
+
+static long tls_dump_ctrl(BIO *bio, int cmd, long num, void *ptr)
+{
+    long ret;
+    BIO *next = BIO_next(bio);
+
+    if (next == NULL)
+        return 0;
+
+    switch (cmd) {
+    case BIO_CTRL_DUP:
+        ret = 0L;
+        break;
+    default:
+        ret = BIO_ctrl(next, cmd, num, ptr);
+        break;
+    }
+    return ret;
+}
+
+static int tls_dump_gets(BIO *bio, char *buf, int size)
+{
+    /* We don't support this - not needed anyway */
+    return -1;
+}
+
+static int tls_dump_puts(BIO *bio, const char *str)
+{
+    return tls_dump_write(bio, str, strlen(str));
+}
+
+
+struct mempacket_st {
+    unsigned char *data;
+    int len;
+    unsigned int num;
+    unsigned int type;
+};
+
+static void mempacket_free(MEMPACKET *pkt)
+{
+    if (pkt->data != NULL)
+        OPENSSL_free(pkt->data);
+    OPENSSL_free(pkt);
+}
+
+typedef struct mempacket_test_ctx_st {
+    STACK_OF(MEMPACKET) *pkts;
+    unsigned int epoch;
+    unsigned int currrec;
+    unsigned int currpkt;
+    unsigned int lastpkt;
+    unsigned int injected;
+    unsigned int noinject;
+    unsigned int dropepoch;
+    int droprec;
+    int duprec;
+} MEMPACKET_TEST_CTX;
+
+static int mempacket_test_new(BIO *bi);
+static int mempacket_test_free(BIO *a);
+static int mempacket_test_read(BIO *b, char *out, int outl);
+static int mempacket_test_write(BIO *b, const char *in, int inl);
+static long mempacket_test_ctrl(BIO *b, int cmd, long num, void *ptr);
+static int mempacket_test_gets(BIO *bp, char *buf, int size);
+static int mempacket_test_puts(BIO *bp, const char *str);
+
+const BIO_METHOD *bio_s_mempacket_test(void)
+{
+    if (meth_mem == NULL) {
+        if (!TEST_ptr(meth_mem = BIO_meth_new(BIO_TYPE_MEMPACKET_TEST,
+                                              "Mem Packet Test"))
+            || !TEST_true(BIO_meth_set_write(meth_mem, mempacket_test_write))
+            || !TEST_true(BIO_meth_set_read(meth_mem, mempacket_test_read))
+            || !TEST_true(BIO_meth_set_puts(meth_mem, mempacket_test_puts))
+            || !TEST_true(BIO_meth_set_gets(meth_mem, mempacket_test_gets))
+            || !TEST_true(BIO_meth_set_ctrl(meth_mem, mempacket_test_ctrl))
+            || !TEST_true(BIO_meth_set_create(meth_mem, mempacket_test_new))
+            || !TEST_true(BIO_meth_set_destroy(meth_mem, mempacket_test_free)))
+            return NULL;
+    }
+    return meth_mem;
+}
+
+void bio_s_mempacket_test_free(void)
+{
+    BIO_meth_free(meth_mem);
+}
+
+static int mempacket_test_new(BIO *bio)
+{
+    MEMPACKET_TEST_CTX *ctx;
+
+    if (!TEST_ptr(ctx = OPENSSL_zalloc(sizeof(*ctx))))
+        return 0;
+    if (!TEST_ptr(ctx->pkts = sk_MEMPACKET_new_null())) {
+        OPENSSL_free(ctx);
+        return 0;
+    }
+    ctx->dropepoch = 0;
+    ctx->droprec = -1;
+    BIO_set_init(bio, 1);
+    BIO_set_data(bio, ctx);
+    return 1;
+}
+
+static int mempacket_test_free(BIO *bio)
+{
+    MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+
+    sk_MEMPACKET_pop_free(ctx->pkts, mempacket_free);
+    OPENSSL_free(ctx);
+    BIO_set_data(bio, NULL);
+    BIO_set_init(bio, 0);
+    return 1;
+}
+
+/* Record Header values */
+#define EPOCH_HI        3
+#define EPOCH_LO        4
+#define RECORD_SEQUENCE 10
+#define RECORD_LEN_HI   11
+#define RECORD_LEN_LO   12
+
+#define STANDARD_PACKET                 0
+
+static int mempacket_test_read(BIO *bio, char *out, int outl)
+{
+    MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+    MEMPACKET *thispkt;
+    unsigned char *rec;
+    int rem;
+    unsigned int seq, offset, len, epoch;
+
+    BIO_clear_retry_flags(bio);
+    thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
+    if (thispkt == NULL || thispkt->num != ctx->currpkt) {
+        /* Probably run out of data */
+        BIO_set_retry_read(bio);
+        return -1;
+    }
+    (void)sk_MEMPACKET_shift(ctx->pkts);
+    ctx->currpkt++;
+
+    if (outl > thispkt->len)
+        outl = thispkt->len;
+
+    if (thispkt->type != INJECT_PACKET_IGNORE_REC_SEQ
+            && (ctx->injected || ctx->droprec >= 0)) {
+        /*
+         * Overwrite the record sequence number. We strictly number them in
+         * the order received. Since we are actually a reliable transport
+         * we know that there won't be any re-ordering. We overwrite to deal
+         * with any packets that have been injected
+         */
+        for (rem = thispkt->len, rec = thispkt->data; rem > 0; rem -= len) {
+            if (rem < DTLS1_RT_HEADER_LENGTH)
+                return -1;
+            epoch = (rec[EPOCH_HI] << 8) | rec[EPOCH_LO];
+            if (epoch != ctx->epoch) {
+                ctx->epoch = epoch;
+                ctx->currrec = 0;
+            }
+            seq = ctx->currrec;
+            offset = 0;
+            do {
+                rec[RECORD_SEQUENCE - offset] = seq & 0xFF;
+                seq >>= 8;
+                offset++;
+            } while (seq > 0);
+
+            len = ((rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO])
+                  + DTLS1_RT_HEADER_LENGTH;
+            if (rem < (int)len)
+                return -1;
+            if (ctx->droprec == (int)ctx->currrec && ctx->dropepoch == epoch) {
+                if (rem > (int)len)
+                    memmove(rec, rec + len, rem - len);
+                outl -= len;
+                ctx->droprec = -1;
+                if (outl == 0)
+                    BIO_set_retry_read(bio);
+            } else {
+                rec += len;
+            }
+
+            ctx->currrec++;
+        }
+    }
+
+    memcpy(out, thispkt->data, outl);
+    mempacket_free(thispkt);
+    return outl;
+}
+
+int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
+                          int type)
+{
+    MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+    MEMPACKET *thispkt = NULL, *looppkt, *nextpkt, *allpkts[3];
+    int i, duprec;
+    const unsigned char *inu = (const unsigned char *)in;
+    size_t len = ((inu[RECORD_LEN_HI] << 8) | inu[RECORD_LEN_LO])
+                 + DTLS1_RT_HEADER_LENGTH;
+
+    if (ctx == NULL)
+        return -1;
+
+    if ((size_t)inl < len)
+        return -1;
+
+    if ((size_t)inl == len)
+        duprec = 0;
+    else
+        duprec = ctx->duprec > 0;
+
+    /* We don't support arbitrary injection when duplicating records */
+    if (duprec && pktnum != -1)
+        return -1;
+
+    /* We only allow injection before we've started writing any data */
+    if (pktnum >= 0) {
+        if (ctx->noinject)
+            return -1;
+        ctx->injected  = 1;
+    } else {
+        ctx->noinject = 1;
+    }
+
+    for (i = 0; i < (duprec ? 3 : 1); i++) {
+        if (!TEST_ptr(allpkts[i] = OPENSSL_malloc(sizeof(*thispkt))))
+            goto err;
+        thispkt = allpkts[i];
+
+        if (!TEST_ptr(thispkt->data = OPENSSL_malloc(inl)))
+            goto err;
+        /*
+         * If we are duplicating the packet, we duplicate it three times. The
+         * first two times we drop the first record if there are more than one.
+         * In this way we know that libssl will not be able to make progress
+         * until it receives the last packet, and hence will be forced to
+         * buffer these records.
+         */
+        if (duprec && i != 2) {
+            memcpy(thispkt->data, in + len, inl - len);
+            thispkt->len = inl - len;
+        } else {
+            memcpy(thispkt->data, in, inl);
+            thispkt->len = inl;
+        }
+        thispkt->num = (pktnum >= 0) ? (unsigned int)pktnum : ctx->lastpkt + i;
+        thispkt->type = type;
+    }
+
+    for(i = 0; (looppkt = sk_MEMPACKET_value(ctx->pkts, i)) != NULL; i++) {
+        /* Check if we found the right place to insert this packet */
+        if (looppkt->num > thispkt->num) {
+            if (sk_MEMPACKET_insert(ctx->pkts, thispkt, i) == 0)
+                goto err;
+            /* If we're doing up front injection then we're done */
+            if (pktnum >= 0)
+                return inl;
+            /*
+             * We need to do some accounting on lastpkt. We increment it first,
+             * but it might now equal the value of injected packets, so we need
+             * to skip over those
+             */
+            ctx->lastpkt++;
+            do {
+                i++;
+                nextpkt = sk_MEMPACKET_value(ctx->pkts, i);
+                if (nextpkt != NULL && nextpkt->num == ctx->lastpkt)
+                    ctx->lastpkt++;
+                else
+                    return inl;
+            } while(1);
+        } else if (looppkt->num == thispkt->num) {
+            if (!ctx->noinject) {
+                /* We injected two packets with the same packet number! */
+                goto err;
+            }
+            ctx->lastpkt++;
+            thispkt->num++;
+        }
+    }
+    /*
+     * We didn't find any packets with a packet number equal to or greater than
+     * this one, so we just add it onto the end
+     */
+    for (i = 0; i < (duprec ? 3 : 1); i++) {
+        thispkt = allpkts[i];
+        if (!sk_MEMPACKET_push(ctx->pkts, thispkt))
+            goto err;
+
+        if (pktnum < 0)
+            ctx->lastpkt++;
+    }
+
+    return inl;
+
+ err:
+    for (i = 0; i < (ctx->duprec > 0 ? 3 : 1); i++)
+        mempacket_free(allpkts[i]);
+    return -1;
+}
+
+static int mempacket_test_write(BIO *bio, const char *in, int inl)
+{
+    return mempacket_test_inject(bio, in, inl, -1, STANDARD_PACKET);
+}
+
+static long mempacket_test_ctrl(BIO *bio, int cmd, long num, void *ptr)
+{
+    long ret = 1;
+    MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+    MEMPACKET *thispkt;
+
+    switch (cmd) {
+    case BIO_CTRL_EOF:
+        ret = (long)(sk_MEMPACKET_num(ctx->pkts) == 0);
+        break;
+    case BIO_CTRL_GET_CLOSE:
+        ret = BIO_get_shutdown(bio);
+        break;
+    case BIO_CTRL_SET_CLOSE:
+        BIO_set_shutdown(bio, (int)num);
+        break;
+    case BIO_CTRL_WPENDING:
+        ret = 0L;
+        break;
+    case BIO_CTRL_PENDING:
+        thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
+        if (thispkt == NULL)
+            ret = 0;
+        else
+            ret = thispkt->len;
+        break;
+    case BIO_CTRL_FLUSH:
+        ret = 1;
+        break;
+    case MEMPACKET_CTRL_SET_DROP_EPOCH:
+        ctx->dropepoch = (unsigned int)num;
+        break;
+    case MEMPACKET_CTRL_SET_DROP_REC:
+        ctx->droprec = (int)num;
+        break;
+    case MEMPACKET_CTRL_GET_DROP_REC:
+        ret = ctx->droprec;
+        break;
+    case MEMPACKET_CTRL_SET_DUPLICATE_REC:
+        ctx->duprec = (int)num;
+        break;
+    case BIO_CTRL_RESET:
+    case BIO_CTRL_DUP:
+    case BIO_CTRL_PUSH:
+    case BIO_CTRL_POP:
+    default:
+        ret = 0;
+        break;
+    }
+    return ret;
+}
+
+static int mempacket_test_gets(BIO *bio, char *buf, int size)
+{
+    /* We don't support this - not needed anyway */
+    return -1;
+}
+
+static int mempacket_test_puts(BIO *bio, const char *str)
+{
+    return mempacket_test_write(bio, str, strlen(str));
+}
+
+static int always_retry_new(BIO *bi);
+static int always_retry_free(BIO *a);
+static int always_retry_read(BIO *b, char *out, int outl);
+static int always_retry_write(BIO *b, const char *in, int inl);
+static long always_retry_ctrl(BIO *b, int cmd, long num, void *ptr);
+static int always_retry_gets(BIO *bp, char *buf, int size);
+static int always_retry_puts(BIO *bp, const char *str);
+
+const BIO_METHOD *bio_s_always_retry(void)
+{
+    if (meth_always_retry == NULL) {
+        if (!TEST_ptr(meth_always_retry = BIO_meth_new(BIO_TYPE_ALWAYS_RETRY,
+                                                       "Always Retry"))
+            || !TEST_true(BIO_meth_set_write(meth_always_retry,
+                                             always_retry_write))
+            || !TEST_true(BIO_meth_set_read(meth_always_retry,
+                                            always_retry_read))
+            || !TEST_true(BIO_meth_set_puts(meth_always_retry,
+                                            always_retry_puts))
+            || !TEST_true(BIO_meth_set_gets(meth_always_retry,
+                                            always_retry_gets))
+            || !TEST_true(BIO_meth_set_ctrl(meth_always_retry,
+                                            always_retry_ctrl))
+            || !TEST_true(BIO_meth_set_create(meth_always_retry,
+                                              always_retry_new))
+            || !TEST_true(BIO_meth_set_destroy(meth_always_retry,
+                                               always_retry_free)))
+            return NULL;
+    }
+    return meth_always_retry;
+}
+
+void bio_s_always_retry_free(void)
+{
+    BIO_meth_free(meth_always_retry);
+}
+
+static int always_retry_new(BIO *bio)
+{
+    BIO_set_init(bio, 1);
+    return 1;
+}
+
+static int always_retry_free(BIO *bio)
+{
+    BIO_set_data(bio, NULL);
+    BIO_set_init(bio, 0);
+    return 1;
+}
+
+static int always_retry_read(BIO *bio, char *out, int outl)
+{
+    BIO_set_retry_read(bio);
+    return -1;
+}
+
+static int always_retry_write(BIO *bio, const char *in, int inl)
+{
+    BIO_set_retry_write(bio);
+    return -1;
+}
+
+static long always_retry_ctrl(BIO *bio, int cmd, long num, void *ptr)
+{
+    long ret = 1;
+
+    switch (cmd) {
+    case BIO_CTRL_FLUSH:
+        BIO_set_retry_write(bio);
+        /* fall through */
+    case BIO_CTRL_EOF:
+    case BIO_CTRL_RESET:
+    case BIO_CTRL_DUP:
+    case BIO_CTRL_PUSH:
+    case BIO_CTRL_POP:
+    default:
+        ret = 0;
+        break;
+    }
+    return ret;
+}
+
+static int always_retry_gets(BIO *bio, char *buf, int size)
+{
+    BIO_set_retry_read(bio);
+    return -1;
+}
+
+static int always_retry_puts(BIO *bio, const char *str)
+{
+    BIO_set_retry_write(bio);
+    return -1;
+}
+
+int create_ssl_ctx_pair(const SSL_METHOD *sm, const SSL_METHOD *cm,
+                        int min_proto_version, int max_proto_version,
+                        SSL_CTX **sctx, SSL_CTX **cctx, char *certfile,
+                        char *privkeyfile)
+{
+    SSL_CTX *serverctx = NULL;
+    SSL_CTX *clientctx = NULL;
+
+    if (!TEST_ptr(serverctx = SSL_CTX_new(sm))
+            || (cctx != NULL && !TEST_ptr(clientctx = SSL_CTX_new(cm))))
+        goto err;
+
+    if ((min_proto_version > 0
+         && !TEST_true(SSL_CTX_set_min_proto_version(serverctx,
+                                                     min_proto_version)))
+        || (max_proto_version > 0
+            && !TEST_true(SSL_CTX_set_max_proto_version(serverctx,
+                                                        max_proto_version))))
+        goto err;
+    if (clientctx != NULL
+        && ((min_proto_version > 0
+             && !TEST_true(SSL_CTX_set_min_proto_version(clientctx,
+                                                         min_proto_version)))
+            || (max_proto_version > 0
+                && !TEST_true(SSL_CTX_set_max_proto_version(clientctx,
+                                                            max_proto_version)))))
+        goto err;
+
+    if (certfile != NULL && privkeyfile != NULL) {
+        if (!TEST_int_eq(SSL_CTX_use_certificate_file(serverctx, certfile,
+                                                      SSL_FILETYPE_PEM), 1)
+                || !TEST_int_eq(SSL_CTX_use_PrivateKey_file(serverctx,
+                                                            privkeyfile,
+                                                            SSL_FILETYPE_PEM), 1)
+                || !TEST_int_eq(SSL_CTX_check_private_key(serverctx), 1))
+            goto err;
+    }
+
+#ifndef OPENSSL_NO_DH
+    SSL_CTX_set_dh_auto(serverctx, 1);
+#endif
+
+    *sctx = serverctx;
+    if (cctx != NULL)
+        *cctx = clientctx;
+    return 1;
+
+ err:
+    SSL_CTX_free(serverctx);
+    SSL_CTX_free(clientctx);
+    return 0;
+}
+
+#define MAXLOOPS    1000000
+
+/*
+ * NOTE: Transfers control of the BIOs - this function will free them on error
+ */
+int create_ssl_objects(SSL_CTX *serverctx, SSL_CTX *clientctx, SSL **sssl,
+                          SSL **cssl, BIO *s_to_c_fbio, BIO *c_to_s_fbio)
+{
+    SSL *serverssl = NULL, *clientssl = NULL;
+    BIO *s_to_c_bio = NULL, *c_to_s_bio = NULL;
+
+    if (*sssl != NULL)
+        serverssl = *sssl;
+    else if (!TEST_ptr(serverssl = SSL_new(serverctx)))
+        goto error;
+    if (*cssl != NULL)
+        clientssl = *cssl;
+    else if (!TEST_ptr(clientssl = SSL_new(clientctx)))
+        goto error;
+
+    if (SSL_is_dtls(clientssl)) {
+        if (!TEST_ptr(s_to_c_bio = BIO_new(bio_s_mempacket_test()))
+                || !TEST_ptr(c_to_s_bio = BIO_new(bio_s_mempacket_test())))
+            goto error;
+    } else {
+        if (!TEST_ptr(s_to_c_bio = BIO_new(BIO_s_mem()))
+                || !TEST_ptr(c_to_s_bio = BIO_new(BIO_s_mem())))
+            goto error;
+    }
+
+    if (s_to_c_fbio != NULL
+            && !TEST_ptr(s_to_c_bio = BIO_push(s_to_c_fbio, s_to_c_bio)))
+        goto error;
+    if (c_to_s_fbio != NULL
+            && !TEST_ptr(c_to_s_bio = BIO_push(c_to_s_fbio, c_to_s_bio)))
+        goto error;
+
+    /* Set Non-blocking IO behaviour */
+    BIO_set_mem_eof_return(s_to_c_bio, -1);
+    BIO_set_mem_eof_return(c_to_s_bio, -1);
+
+    /* Up ref these as we are passing them to two SSL objects */
+    SSL_set_bio(serverssl, c_to_s_bio, s_to_c_bio);
+    BIO_up_ref(s_to_c_bio);
+    BIO_up_ref(c_to_s_bio);
+    SSL_set_bio(clientssl, s_to_c_bio, c_to_s_bio);
+    *sssl = serverssl;
+    *cssl = clientssl;
+    return 1;
+
+ error:
+    SSL_free(serverssl);
+    SSL_free(clientssl);
+    BIO_free(s_to_c_bio);
+    BIO_free(c_to_s_bio);
+    BIO_free(s_to_c_fbio);
+    BIO_free(c_to_s_fbio);
+
+    return 0;
+}
+
+/*
+ * Create an SSL connection, but does not ready any post-handshake
+ * NewSessionTicket messages.
+ * If |read| is set and we're using DTLS then we will attempt to SSL_read on
+ * the connection once we've completed one half of it, to ensure any retransmits
+ * get triggered.
+ */
+int create_bare_ssl_connection(SSL *serverssl, SSL *clientssl, int want,
+                               int read)
+{
+    int retc = -1, rets = -1, err, abortctr = 0;
+    int clienterr = 0, servererr = 0;
+    int isdtls = SSL_is_dtls(serverssl);
+
+    do {
+        err = SSL_ERROR_WANT_WRITE;
+        while (!clienterr && retc <= 0 && err == SSL_ERROR_WANT_WRITE) {
+            retc = SSL_connect(clientssl);
+            if (retc <= 0)
+                err = SSL_get_error(clientssl, retc);
+        }
+
+        if (!clienterr && retc <= 0 && err != SSL_ERROR_WANT_READ) {
+            TEST_info("SSL_connect() failed %d, %d", retc, err);
+            clienterr = 1;
+        }
+        if (want != SSL_ERROR_NONE && err == want)
+            return 0;
+
+        err = SSL_ERROR_WANT_WRITE;
+        while (!servererr && rets <= 0 && err == SSL_ERROR_WANT_WRITE) {
+            rets = SSL_accept(serverssl);
+            if (rets <= 0)
+                err = SSL_get_error(serverssl, rets);
+        }
+
+        if (!servererr && rets <= 0
+                && err != SSL_ERROR_WANT_READ
+                && err != SSL_ERROR_WANT_X509_LOOKUP) {
+            TEST_info("SSL_accept() failed %d, %d", rets, err);
+            servererr = 1;
+        }
+        if (want != SSL_ERROR_NONE && err == want)
+            return 0;
+        if (clienterr && servererr)
+            return 0;
+        if (isdtls && read) {
+            unsigned char buf[20];
+
+            /* Trigger any retransmits that may be appropriate */
+            if (rets > 0 && retc <= 0) {
+                if (SSL_read(serverssl, buf, sizeof(buf)) > 0) {
+                    /* We don't expect this to succeed! */
+                    TEST_info("Unexpected SSL_read() success!");
+                    return 0;
+                }
+            }
+            if (retc > 0 && rets <= 0) {
+                if (SSL_read(clientssl, buf, sizeof(buf)) > 0) {
+                    /* We don't expect this to succeed! */
+                    TEST_info("Unexpected SSL_read() success!");
+                    return 0;
+                }
+            }
+        }
+        if (++abortctr == MAXLOOPS) {
+            TEST_info("No progress made");
+            return 0;
+        }
+        if (isdtls && abortctr <= 50 && (abortctr % 10) == 0) {
+            /*
+             * It looks like we're just spinning. Pause for a short period to
+             * give the DTLS timer a chance to do something. We only do this for
+             * the first few times to prevent hangs.
+             */
+            ossl_sleep(50);
+        }
+    } while (retc <=0 || rets <= 0);
+
+    return 1;
+}
+
+/*
+ * Create an SSL connection including any post handshake NewSessionTicket
+ * messages.
+ */
+int create_ssl_connection(SSL *serverssl, SSL *clientssl, int want)
+{
+    int i;
+    unsigned char buf;
+    size_t readbytes;
+
+    if (!create_bare_ssl_connection(serverssl, clientssl, want, 1))
+        return 0;
+
+    /*
+     * We attempt to read some data on the client side which we expect to fail.
+     * This will ensure we have received the NewSessionTicket in TLSv1.3 where
+     * appropriate. We do this twice because there are 2 NewSessionTickets.
+     */
+    for (i = 0; i < 2; i++) {
+        if (SSL_read_ex(clientssl, &buf, sizeof(buf), &readbytes) > 0) {
+            if (!TEST_ulong_eq(readbytes, 0))
+                return 0;
+        } else if (!TEST_int_eq(SSL_get_error(clientssl, 0),
+                                SSL_ERROR_WANT_READ)) {
+            return 0;
+        }
+    }
+
+    return 1;
+}
+
+void shutdown_ssl_connection(SSL *serverssl, SSL *clientssl)
+{
+    SSL_shutdown(clientssl);
+    SSL_shutdown(serverssl);
+    SSL_free(serverssl);
+    SSL_free(clientssl);
+}