Removed old mbedtls, replacing with submodule.

1 files changed, 0 insertions, 1024 deletions

diff --git a/lib/mbedtls-2.27.0/programs/test/udp_proxy.c b/lib/mbedtls-2.27.0/programs/test/udp_proxy.c
deleted file mode 100644
index afe0118..0000000
--- a/lib/mbedtls-2.27.0/programs/test/udp_proxy.c
+++ /dev/null
@@ -1,1024 +0,0 @@
-/*
- *  UDP proxy: emulate an unreliable UDP connexion for DTLS testing
- *
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-/*
- * Warning: this is an internal utility program we use for tests.
- * It does break some abstractions from the NET layer, and is thus NOT an
- * example of good general usage.
- */
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#define mbedtls_time            time
-#define mbedtls_time_t          time_t
-#define mbedtls_printf          printf
-#define mbedtls_calloc          calloc
-#define mbedtls_free            free
-#define mbedtls_exit            exit
-#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
-#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
-#endif /* MBEDTLS_PLATFORM_C */
-
-#if !defined(MBEDTLS_NET_C)
-int main( void )
-{
-    mbedtls_printf( "MBEDTLS_NET_C not defined.\n" );
-    mbedtls_exit( 0 );
-}
-#else
-
-#include "mbedtls/net_sockets.h"
-#include "mbedtls/error.h"
-#include "mbedtls/ssl.h"
-#include "mbedtls/timing.h"
-
-#include <string.h>
-
-/* For select() */
-#if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \
-    !defined(EFI32)
-#include <winsock2.h>
-#include <windows.h>
-#if defined(_MSC_VER)
-#if defined(_WIN32_WCE)
-#pragma comment( lib, "ws2.lib" )
-#else
-#pragma comment( lib, "ws2_32.lib" )
-#endif
-#endif /* _MSC_VER */
-#else /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-#endif /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */
-
-#define MAX_MSG_SIZE            16384 + 2048 /* max record/datagram size */
-
-#define DFL_SERVER_ADDR         "localhost"
-#define DFL_SERVER_PORT         "4433"
-#define DFL_LISTEN_ADDR         "localhost"
-#define DFL_LISTEN_PORT         "5556"
-#define DFL_PACK                0
-
-#if defined(MBEDTLS_TIMING_C)
-#define USAGE_PACK                                                          \
-    "    pack=%%d             default: 0     (don't pack)\n"                \
-    "                         options: t > 0 (pack for t milliseconds)\n"
-#else
-#define USAGE_PACK
-#endif
-
-#define USAGE                                                               \
-    "\n usage: udp_proxy param=<>...\n"                                     \
-    "\n acceptable parameters:\n"                                           \
-    "    server_addr=%%s      default: localhost\n"                         \
-    "    server_port=%%d      default: 4433\n"                              \
-    "    listen_addr=%%s      default: localhost\n"                         \
-    "    listen_port=%%d      default: 4433\n"                              \
-    "\n"                                                                    \
-    "    duplicate=%%d        default: 0 (no duplication)\n"                \
-    "                        duplicate about 1:N packets randomly\n"        \
-    "    delay=%%d            default: 0 (no delayed packets)\n"            \
-    "                        delay about 1:N packets randomly\n"            \
-    "    delay_ccs=0/1       default: 0 (don't delay ChangeCipherSpec)\n"   \
-    "    delay_cli=%%s        Handshake message from client that should be\n"\
-    "                        delayed. Possible values are 'ClientHello',\n" \
-    "                        'Certificate', 'CertificateVerify', and\n"     \
-    "                        'ClientKeyExchange'.\n"                        \
-    "                        May be used multiple times, even for the same\n"\
-    "                        message, in which case the respective message\n"\
-    "                        gets delayed multiple times.\n"                 \
-    "    delay_srv=%%s        Handshake message from server that should be\n"\
-    "                        delayed. Possible values are 'HelloRequest',\n"\
-    "                        'ServerHello', 'ServerHelloDone', 'Certificate'\n"\
-    "                        'ServerKeyExchange', 'NewSessionTicket',\n"\
-    "                        'HelloVerifyRequest' and ''CertificateRequest'.\n"\
-    "                        May be used multiple times, even for the same\n"\
-    "                        message, in which case the respective message\n"\
-    "                        gets delayed multiple times.\n"                 \
-    "    drop=%%d             default: 0 (no dropped packets)\n"            \
-    "                        drop about 1:N packets randomly\n"             \
-    "    mtu=%%d              default: 0 (unlimited)\n"                     \
-    "                        drop packets larger than N bytes\n"            \
-    "    bad_ad=0/1          default: 0 (don't add bad ApplicationData)\n"  \
-    "    bad_cid=%%d          default: 0 (don't corrupt Connection IDs)\n"   \
-    "                        duplicate 1:N packets containing a CID,\n" \
-    "                        modifying CID in first instance of the packet.\n" \
-    "    protect_hvr=0/1     default: 0 (don't protect HelloVerifyRequest)\n" \
-    "    protect_len=%%d      default: (don't protect packets of this size)\n" \
-    "    inject_clihlo=0/1   default: 0 (don't inject fake ClientHello)\n"  \
-    "\n"                                                                    \
-    "    seed=%%d             default: (use current time)\n"                \
-    USAGE_PACK                                                              \
-    "\n"
-
-/*
- * global options
- */
-
-#define MAX_DELAYED_HS 10
-
-static struct options
-{
-    const char *server_addr;    /* address to forward packets to            */
-    const char *server_port;    /* port to forward packets to               */
-    const char *listen_addr;    /* address for accepting client connections */
-    const char *listen_port;    /* port for accepting client connections    */
-
-    int duplicate;              /* duplicate 1 in N packets (none if 0)     */
-    int delay;                  /* delay 1 packet in N (none if 0)          */
-    int delay_ccs;              /* delay ChangeCipherSpec                   */
-    char* delay_cli[MAX_DELAYED_HS];  /* handshake types of messages from
-                                       * client that should be delayed.     */
-    uint8_t delay_cli_cnt;      /* Number of entries in delay_cli.          */
-    char* delay_srv[MAX_DELAYED_HS];  /* handshake types of messages from
-                                       * server that should be delayed.     */
-    uint8_t delay_srv_cnt;      /* Number of entries in delay_srv.          */
-    int drop;                   /* drop 1 packet in N (none if 0)           */
-    int mtu;                    /* drop packets larger than this            */
-    int bad_ad;                 /* inject corrupted ApplicationData record  */
-    unsigned bad_cid;           /* inject corrupted CID record              */
-    int protect_hvr;            /* never drop or delay HelloVerifyRequest   */
-    int protect_len;            /* never drop/delay packet of the given size*/
-    int inject_clihlo;          /* inject fake ClientHello after handshake  */
-    unsigned pack;              /* merge packets into single datagram for
-                                 * at most \c merge milliseconds if > 0     */
-    unsigned int seed;          /* seed for "random" events                 */
-} opt;
-
-static void exit_usage( const char *name, const char *value )
-{
-    if( value == NULL )
-        mbedtls_printf( " unknown option or missing value: %s\n", name );
-    else
-        mbedtls_printf( " option %s: illegal value: %s\n", name, value );
-
-    mbedtls_printf( USAGE );
-    mbedtls_exit( 1 );
-}
-
-static void get_options( int argc, char *argv[] )
-{
-    int i;
-    char *p, *q;
-
-    opt.server_addr    = DFL_SERVER_ADDR;
-    opt.server_port    = DFL_SERVER_PORT;
-    opt.listen_addr    = DFL_LISTEN_ADDR;
-    opt.listen_port    = DFL_LISTEN_PORT;
-    opt.pack           = DFL_PACK;
-    /* Other members default to 0 */
-
-    opt.delay_cli_cnt = 0;
-    opt.delay_srv_cnt = 0;
-    memset( opt.delay_cli, 0, sizeof( opt.delay_cli ) );
-    memset( opt.delay_srv, 0, sizeof( opt.delay_srv ) );
-
-    for( i = 1; i < argc; i++ )
-    {
-        p = argv[i];
-        if( ( q = strchr( p, '=' ) ) == NULL )
-            exit_usage( p, NULL );
-        *q++ = '\0';
-
-        if( strcmp( p, "server_addr" ) == 0 )
-            opt.server_addr = q;
-        else if( strcmp( p, "server_port" ) == 0 )
-            opt.server_port = q;
-        else if( strcmp( p, "listen_addr" ) == 0 )
-            opt.listen_addr = q;
-        else if( strcmp( p, "listen_port" ) == 0 )
-            opt.listen_port = q;
-        else if( strcmp( p, "duplicate" ) == 0 )
-        {
-            opt.duplicate = atoi( q );
-            if( opt.duplicate < 0 || opt.duplicate > 20 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "delay" ) == 0 )
-        {
-            opt.delay = atoi( q );
-            if( opt.delay < 0 || opt.delay > 20 || opt.delay == 1 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "delay_ccs" ) == 0 )
-        {
-            opt.delay_ccs = atoi( q );
-            if( opt.delay_ccs < 0 || opt.delay_ccs > 1 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "delay_cli" ) == 0 ||
-                 strcmp( p, "delay_srv" ) == 0 )
-        {
-            uint8_t *delay_cnt;
-            char **delay_list;
-            size_t len;
-            char *buf;
-
-            if( strcmp( p, "delay_cli" ) == 0 )
-            {
-                delay_cnt  = &opt.delay_cli_cnt;
-                delay_list = opt.delay_cli;
-            }
-            else
-            {
-                delay_cnt  = &opt.delay_srv_cnt;
-                delay_list = opt.delay_srv;
-            }
-
-            if( *delay_cnt == MAX_DELAYED_HS )
-            {
-                mbedtls_printf( " too many uses of %s: only %d allowed\n",
-                                p, MAX_DELAYED_HS );
-                exit_usage( p, NULL );
-            }
-
-            len = strlen( q );
-            buf = mbedtls_calloc( 1, len + 1 );
-            if( buf == NULL )
-            {
-                mbedtls_printf( " Allocation failure\n" );
-                exit( 1 );
-            }
-            memcpy( buf, q, len + 1 );
-
-            delay_list[ (*delay_cnt)++ ] = buf;
-        }
-        else if( strcmp( p, "drop" ) == 0 )
-        {
-            opt.drop = atoi( q );
-            if( opt.drop < 0 || opt.drop > 20 || opt.drop == 1 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "pack" ) == 0 )
-        {
-#if defined(MBEDTLS_TIMING_C)
-            opt.pack = (unsigned) atoi( q );
-#else
-            mbedtls_printf( " option pack only defined if MBEDTLS_TIMING_C is enabled\n" );
-            exit( 1 );
-#endif
-        }
-        else if( strcmp( p, "mtu" ) == 0 )
-        {
-            opt.mtu = atoi( q );
-            if( opt.mtu < 0 || opt.mtu > MAX_MSG_SIZE )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "bad_ad" ) == 0 )
-        {
-            opt.bad_ad = atoi( q );
-            if( opt.bad_ad < 0 || opt.bad_ad > 1 )
-                exit_usage( p, q );
-        }
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-        else if( strcmp( p, "bad_cid" ) == 0 )
-        {
-            opt.bad_cid = (unsigned) atoi( q );
-        }
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-        else if( strcmp( p, "protect_hvr" ) == 0 )
-        {
-            opt.protect_hvr = atoi( q );
-            if( opt.protect_hvr < 0 || opt.protect_hvr > 1 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "protect_len" ) == 0 )
-        {
-            opt.protect_len = atoi( q );
-            if( opt.protect_len < 0 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "inject_clihlo" ) == 0 )
-        {
-            opt.inject_clihlo = atoi( q );
-            if( opt.inject_clihlo < 0 || opt.inject_clihlo > 1 )
-                exit_usage( p, q );
-        }
-        else if( strcmp( p, "seed" ) == 0 )
-        {
-            opt.seed = atoi( q );
-            if( opt.seed == 0 )
-                exit_usage( p, q );
-        }
-        else
-            exit_usage( p, NULL );
-    }
-}
-
-static const char *msg_type( unsigned char *msg, size_t len )
-{
-    if( len < 1 )                           return( "Invalid" );
-    switch( msg[0] )
-    {
-        case MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC:    return( "ChangeCipherSpec" );
-        case MBEDTLS_SSL_MSG_ALERT:                 return( "Alert" );
-        case MBEDTLS_SSL_MSG_APPLICATION_DATA:      return( "ApplicationData" );
-        case MBEDTLS_SSL_MSG_CID:                   return( "CID" );
-        case MBEDTLS_SSL_MSG_HANDSHAKE:             break; /* See below */
-        default:                            return( "Unknown" );
-    }
-
-    if( len < 13 + 12 )                     return( "Invalid handshake" );
-
-    /*
-     * Our handshake message are less than 2^16 bytes long, so they should
-     * have 0 as the first byte of length, frag_offset and frag_length.
-     * Otherwise, assume they are encrypted.
-     */
-    if( msg[14] || msg[19] || msg[22] )     return( "Encrypted handshake" );
-
-    switch( msg[13] )
-    {
-        case MBEDTLS_SSL_HS_HELLO_REQUEST:          return( "HelloRequest" );
-        case MBEDTLS_SSL_HS_CLIENT_HELLO:           return( "ClientHello" );
-        case MBEDTLS_SSL_HS_SERVER_HELLO:           return( "ServerHello" );
-        case MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST:   return( "HelloVerifyRequest" );
-        case MBEDTLS_SSL_HS_NEW_SESSION_TICKET:     return( "NewSessionTicket" );
-        case MBEDTLS_SSL_HS_CERTIFICATE:            return( "Certificate" );
-        case MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE:    return( "ServerKeyExchange" );
-        case MBEDTLS_SSL_HS_CERTIFICATE_REQUEST:    return( "CertificateRequest" );
-        case MBEDTLS_SSL_HS_SERVER_HELLO_DONE:      return( "ServerHelloDone" );
-        case MBEDTLS_SSL_HS_CERTIFICATE_VERIFY:     return( "CertificateVerify" );
-        case MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE:    return( "ClientKeyExchange" );
-        case MBEDTLS_SSL_HS_FINISHED:               return( "Finished" );
-        default:                            return( "Unknown handshake" );
-    }
-}
-
-#if defined(MBEDTLS_TIMING_C)
-/* Return elapsed time in milliseconds since the first call */
-static unsigned ellapsed_time( void )
-{
-    static int initialized = 0;
-    static struct mbedtls_timing_hr_time hires;
-
-    if( initialized == 0 )
-    {
-        (void) mbedtls_timing_get_timer( &hires, 1 );
-        initialized = 1;
-        return( 0 );
-    }
-
-    return( mbedtls_timing_get_timer( &hires, 0 ) );
-}
-
-typedef struct
-{
-    mbedtls_net_context *ctx;
-
-    const char *description;
-
-    unsigned packet_lifetime;
-    unsigned num_datagrams;
-
-    unsigned char data[MAX_MSG_SIZE];
-    size_t len;
-
-} ctx_buffer;
-
-static ctx_buffer outbuf[2];
-
-static int ctx_buffer_flush( ctx_buffer *buf )
-{
-    int ret;
-
-    mbedtls_printf( "  %05u flush    %s: %u bytes, %u datagrams, last %u ms\n",
-                    ellapsed_time(), buf->description,
-                    (unsigned) buf->len, buf->num_datagrams,
-                    ellapsed_time() - buf->packet_lifetime );
-
-    ret = mbedtls_net_send( buf->ctx, buf->data, buf->len );
-
-    buf->len           = 0;
-    buf->num_datagrams = 0;
-
-    return( ret );
-}
-
-static unsigned ctx_buffer_time_remaining( ctx_buffer *buf )
-{
-    unsigned const cur_time = ellapsed_time();
-
-    if( buf->num_datagrams == 0 )
-        return( (unsigned) -1 );
-
-    if( cur_time - buf->packet_lifetime >= opt.pack )
-        return( 0 );
-
-    return( opt.pack - ( cur_time - buf->packet_lifetime ) );
-}
-
-static int ctx_buffer_append( ctx_buffer *buf,
-                              const unsigned char * data,
-                              size_t len )
-{
-    int ret;
-
-    if( len > (size_t) INT_MAX )
-        return( -1 );
-
-    if( len > sizeof( buf->data ) )
-    {
-        mbedtls_printf( "  ! buffer size %u too large (max %u)\n",
-                        (unsigned) len, (unsigned) sizeof( buf->data ) );
-        return( -1 );
-    }
-
-    if( sizeof( buf->data ) - buf->len < len )
-    {
-        if( ( ret = ctx_buffer_flush( buf ) ) <= 0 )
-        {
-            mbedtls_printf( "ctx_buffer_flush failed with -%#04x", (unsigned int) -ret );
-            return( ret );
-        }
-    }
-
-    memcpy( buf->data + buf->len, data, len );
-
-    buf->len += len;
-    if( ++buf->num_datagrams == 1 )
-        buf->packet_lifetime = ellapsed_time();
-
-    return( (int) len );
-}
-#endif /* MBEDTLS_TIMING_C */
-
-static int dispatch_data( mbedtls_net_context *ctx,
-                          const unsigned char * data,
-                          size_t len )
-{
-    int ret;
-#if defined(MBEDTLS_TIMING_C)
-    ctx_buffer *buf = NULL;
-    if( opt.pack > 0 )
-    {
-        if( outbuf[0].ctx == ctx )
-            buf = &outbuf[0];
-        else if( outbuf[1].ctx == ctx )
-            buf = &outbuf[1];
-
-        if( buf == NULL )
-            return( -1 );
-
-        return( ctx_buffer_append( buf, data, len ) );
-    }
-#endif /* MBEDTLS_TIMING_C */
-
-    ret = mbedtls_net_send( ctx, data, len );
-    if( ret < 0 )
-    {
-        mbedtls_printf( "net_send returned -%#04x\n", (unsigned int) -ret );
-    }
-    return( ret );
-}
-
-typedef struct
-{
-    mbedtls_net_context *dst;
-    const char *way;
-    const char *type;
-    unsigned len;
-    unsigned char buf[MAX_MSG_SIZE];
-} packet;
-
-/* Print packet. Outgoing packets come with a reason (forward, dupl, etc.) */
-void print_packet( const packet *p, const char *why )
-{
-#if defined(MBEDTLS_TIMING_C)
-    if( why == NULL )
-        mbedtls_printf( "  %05u dispatch %s %s (%u bytes)\n",
-                ellapsed_time(), p->way, p->type, p->len );
-    else
-        mbedtls_printf( "  %05u dispatch %s %s (%u bytes): %s\n",
-                ellapsed_time(), p->way, p->type, p->len, why );
-#else
-    if( why == NULL )
-        mbedtls_printf( "        dispatch %s %s (%u bytes)\n",
-                p->way, p->type, p->len );
-    else
-        mbedtls_printf( "        dispatch %s %s (%u bytes): %s\n",
-                p->way, p->type, p->len, why );
-#endif
-
-    fflush( stdout );
-}
-
-/*
- * In order to test the server's behaviour when receiving a ClientHello after
- * the connection is established (this could be a hard reset from the client,
- * but the server must not drop the existing connection before establishing
- * client reachability, see RFC 6347 Section 4.2.8), we memorize the first
- * ClientHello we see (which can't have a cookie), then replay it after the
- * first ApplicationData record - then we're done.
- *
- * This is controlled by the inject_clihlo option.
- *
- * We want an explicit state and a place to store the packet.
- */
-typedef enum {
-    ICH_INIT,       /* haven't seen the first ClientHello yet */
-    ICH_CACHED,     /* cached the initial ClientHello */
-    ICH_INJECTED,   /* ClientHello already injected, done */
-} inject_clihlo_state_t;
-
-static inject_clihlo_state_t inject_clihlo_state;
-static packet initial_clihlo;
-
-int send_packet( const packet *p, const char *why )
-{
-    int ret;
-    mbedtls_net_context *dst = p->dst;
-
-    /* save initial ClientHello? */
-    if( opt.inject_clihlo != 0 &&
-        inject_clihlo_state == ICH_INIT &&
-        strcmp( p->type, "ClientHello" ) == 0 )
-    {
-        memcpy( &initial_clihlo, p, sizeof( packet ) );
-        inject_clihlo_state = ICH_CACHED;
-    }
-
-    /* insert corrupted CID record? */
-    if( opt.bad_cid != 0 &&
-        strcmp( p->type, "CID" ) == 0 &&
-        ( rand() % opt.bad_cid ) == 0 )
-    {
-        unsigned char buf[MAX_MSG_SIZE];
-        memcpy( buf, p->buf, p->len );
-
-        /* The CID resides at offset 11 in the DTLS record header. */
-        buf[11] ^= 1;
-        print_packet( p, "modified CID" );
-
-        if( ( ret = dispatch_data( dst, buf, p->len ) ) <= 0 )
-        {
-            mbedtls_printf( "  ! dispatch returned %d\n", ret );
-            return( ret );
-        }
-    }
-
-    /* insert corrupted ApplicationData record? */
-    if( opt.bad_ad &&
-        strcmp( p->type, "ApplicationData" ) == 0 )
-    {
-        unsigned char buf[MAX_MSG_SIZE];
-        memcpy( buf, p->buf, p->len );
-
-        if( p->len <= 13 )
-        {
-            mbedtls_printf( "  ! can't corrupt empty AD record" );
-        }
-        else
-        {
-            ++buf[13];
-            print_packet( p, "corrupted" );
-        }
-
-        if( ( ret = dispatch_data( dst, buf, p->len ) ) <= 0 )
-        {
-            mbedtls_printf( "  ! dispatch returned %d\n", ret );
-            return( ret );
-        }
-    }
-
-    print_packet( p, why );
-    if( ( ret = dispatch_data( dst, p->buf, p->len ) ) <= 0 )
-    {
-        mbedtls_printf( "  ! dispatch returned %d\n", ret );
-        return( ret );
-    }
-
-    /* Don't duplicate Application Data, only handshake covered */
-    if( opt.duplicate != 0 &&
-        strcmp( p->type, "ApplicationData" ) != 0 &&
-        rand() % opt.duplicate == 0 )
-    {
-        print_packet( p, "duplicated" );
-
-        if( ( ret = dispatch_data( dst, p->buf, p->len ) ) <= 0 )
-        {
-            mbedtls_printf( "  ! dispatch returned %d\n", ret );
-            return( ret );
-        }
-    }
-
-    /* Inject ClientHello after first ApplicationData */
-    if( opt.inject_clihlo != 0 &&
-        inject_clihlo_state == ICH_CACHED &&
-        strcmp( p->type, "ApplicationData" ) == 0 )
-    {
-        print_packet( &initial_clihlo, "injected" );
-
-        if( ( ret = dispatch_data( dst, initial_clihlo.buf,
-                                        initial_clihlo.len ) ) <= 0 )
-        {
-            mbedtls_printf( "  ! dispatch returned %d\n", ret );
-            return( ret );
-        }
-
-        inject_clihlo_state = ICH_INJECTED;
-    }
-
-    return( 0 );
-}
-
-#define MAX_DELAYED_MSG 5
-static size_t prev_len;
-static packet prev[MAX_DELAYED_MSG];
-
-void clear_pending( void )
-{
-    memset( &prev, 0, sizeof( prev ) );
-    prev_len = 0;
-}
-
-void delay_packet( packet *delay )
-{
-    if( prev_len == MAX_DELAYED_MSG )
-        return;
-
-    memcpy( &prev[prev_len++], delay, sizeof( packet ) );
-}
-
-int send_delayed()
-{
-    uint8_t offset;
-    int ret;
-    for( offset = 0; offset < prev_len; offset++ )
-    {
-        ret = send_packet( &prev[offset], "delayed" );
-        if( ret != 0 )
-            return( ret );
-    }
-
-    clear_pending();
-    return( 0 );
-}
-
-/*
- * Avoid dropping or delaying a packet that was already dropped twice: this
- * only results in uninteresting timeouts. We can't rely on type to identify
- * packets, since during renegotiation they're all encrypted.  So, rely on
- * size mod 2048 (which is usually just size).
- */
-static unsigned char dropped[2048] = { 0 };
-#define DROP_MAX 2
-
-/* We only drop packets at the level of entire datagrams, not at the level
- * of records. In particular, if the peer changes the way it packs multiple
- * records into a single datagram, we don't necessarily count the number of
- * times a record has been dropped correctly. However, the only known reason
- * why a peer would change datagram packing is disabling the latter on
- * retransmission, in which case we'd drop involved records at most
- * DROP_MAX + 1 times. */
-void update_dropped( const packet *p )
-{
-    size_t id = p->len % sizeof( dropped );
-    ++dropped[id];
-}
-
-int handle_message( const char *way,
-                    mbedtls_net_context *dst,
-                    mbedtls_net_context *src )
-{
-    int ret;
-    packet cur;
-    size_t id;
-
-    uint8_t delay_idx;
-    char ** delay_list;
-    uint8_t delay_list_len;
-
-    /* receive packet */
-    if( ( ret = mbedtls_net_recv( src, cur.buf, sizeof( cur.buf ) ) ) <= 0 )
-    {
-        mbedtls_printf( "  ! mbedtls_net_recv returned %d\n", ret );
-        return( ret );
-    }
-
-    cur.len  = ret;
-    cur.type = msg_type( cur.buf, cur.len );
-    cur.way  = way;
-    cur.dst  = dst;
-    print_packet( &cur, NULL );
-
-    id = cur.len % sizeof( dropped );
-
-    if( strcmp( way, "S <- C" ) == 0 )
-    {
-        delay_list     = opt.delay_cli;
-        delay_list_len = opt.delay_cli_cnt;
-    }
-    else
-    {
-        delay_list     = opt.delay_srv;
-        delay_list_len = opt.delay_srv_cnt;
-    }
-
-    /* Check if message type is in the list of messages
-     * that should be delayed */
-    for( delay_idx = 0; delay_idx < delay_list_len; delay_idx++ )
-    {
-        if( delay_list[ delay_idx ] == NULL )
-            continue;
-
-        if( strcmp( delay_list[ delay_idx ], cur.type ) == 0 )
-        {
-            /* Delay message */
-            delay_packet( &cur );
-
-            /* Remove entry from list */
-            mbedtls_free( delay_list[delay_idx] );
-            delay_list[delay_idx] = NULL;
-
-            return( 0 );
-        }
-    }
-
-    /* do we want to drop, delay, or forward it? */
-    if( ( opt.mtu != 0 &&
-          cur.len > (unsigned) opt.mtu ) ||
-        ( opt.drop != 0 &&
-          strcmp( cur.type, "CID" ) != 0             &&
-          strcmp( cur.type, "ApplicationData" ) != 0 &&
-          ! ( opt.protect_hvr &&
-              strcmp( cur.type, "HelloVerifyRequest" ) == 0 ) &&
-          cur.len != (size_t) opt.protect_len &&
-          dropped[id] < DROP_MAX &&
-          rand() % opt.drop == 0 ) )
-    {
-        update_dropped( &cur );
-    }
-    else if( ( opt.delay_ccs == 1 &&
-               strcmp( cur.type, "ChangeCipherSpec" ) == 0 ) ||
-             ( opt.delay != 0 &&
-               strcmp( cur.type, "CID" ) != 0             &&
-               strcmp( cur.type, "ApplicationData" ) != 0 &&
-               ! ( opt.protect_hvr &&
-                   strcmp( cur.type, "HelloVerifyRequest" ) == 0 ) &&
-               cur.len != (size_t) opt.protect_len &&
-               dropped[id] < DROP_MAX &&
-               rand() % opt.delay == 0 ) )
-    {
-        delay_packet( &cur );
-    }
-    else
-    {
-        /* forward and possibly duplicate */
-        if( ( ret = send_packet( &cur, "forwarded" ) ) != 0 )
-            return( ret );
-
-        /* send previously delayed messages if any */
-        ret = send_delayed();
-        if( ret != 0 )
-            return( ret );
-    }
-
-    return( 0 );
-}
-
-int main( int argc, char *argv[] )
-{
-    int ret = 1;
-    int exit_code = MBEDTLS_EXIT_FAILURE;
-    uint8_t delay_idx;
-
-    mbedtls_net_context listen_fd, client_fd, server_fd;
-
-#if defined( MBEDTLS_TIMING_C )
-    struct timeval tm;
-#endif
-
-    struct timeval *tm_ptr = NULL;
-
-    int nb_fds;
-    fd_set read_fds;
-
-    mbedtls_net_init( &listen_fd );
-    mbedtls_net_init( &client_fd );
-    mbedtls_net_init( &server_fd );
-
-    get_options( argc, argv );
-
-    /*
-     * Decisions to drop/delay/duplicate packets are pseudo-random: dropping
-     * exactly 1 in N packets would lead to problems when a flight has exactly
-     * N packets: the same packet would be dropped on every resend.
-     *
-     * In order to be able to reproduce problems reliably, the seed may be
-     * specified explicitly.
-     */
-    if( opt.seed == 0 )
-    {
-        opt.seed = (unsigned int) time( NULL );
-        mbedtls_printf( "  . Pseudo-random seed: %u\n", opt.seed );
-    }
-
-    srand( opt.seed );
-
-    /*
-     * 0. "Connect" to the server
-     */
-    mbedtls_printf( "  . Connect to server on UDP/%s/%s ...",
-            opt.server_addr, opt.server_port );
-    fflush( stdout );
-
-    if( ( ret = mbedtls_net_connect( &server_fd, opt.server_addr, opt.server_port,
-                             MBEDTLS_NET_PROTO_UDP ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_net_connect returned %d\n\n", ret );
-        goto exit;
-    }
-
-    mbedtls_printf( " ok\n" );
-
-    /*
-     * 1. Setup the "listening" UDP socket
-     */
-    mbedtls_printf( "  . Bind on UDP/%s/%s ...",
-            opt.listen_addr, opt.listen_port );
-    fflush( stdout );
-
-    if( ( ret = mbedtls_net_bind( &listen_fd, opt.listen_addr, opt.listen_port,
-                          MBEDTLS_NET_PROTO_UDP ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_net_bind returned %d\n\n", ret );
-        goto exit;
-    }
-
-    mbedtls_printf( " ok\n" );
-
-    /*
-     * 2. Wait until a client connects
-     */
-accept:
-    mbedtls_net_free( &client_fd );
-
-    mbedtls_printf( "  . Waiting for a remote connection ..." );
-    fflush( stdout );
-
-    if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
-                                    NULL, 0, NULL ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_net_accept returned %d\n\n", ret );
-        goto exit;
-    }
-
-    mbedtls_printf( " ok\n" );
-
-    /*
-     * 3. Forward packets forever (kill the process to terminate it)
-     */
-    clear_pending();
-    memset( dropped, 0, sizeof( dropped ) );
-
-    nb_fds = client_fd.fd;
-    if( nb_fds < server_fd.fd )
-        nb_fds = server_fd.fd;
-    if( nb_fds < listen_fd.fd )
-        nb_fds = listen_fd.fd;
-    ++nb_fds;
-
-#if defined(MBEDTLS_TIMING_C)
-    if( opt.pack > 0 )
-    {
-        outbuf[0].ctx = &server_fd;
-        outbuf[0].description = "S <- C";
-        outbuf[0].num_datagrams = 0;
-        outbuf[0].len = 0;
-
-        outbuf[1].ctx = &client_fd;
-        outbuf[1].description = "S -> C";
-        outbuf[1].num_datagrams = 0;
-        outbuf[1].len = 0;
-    }
-#endif /* MBEDTLS_TIMING_C */
-
-    while( 1 )
-    {
-#if defined(MBEDTLS_TIMING_C)
-        if( opt.pack > 0 )
-        {
-            unsigned max_wait_server, max_wait_client, max_wait;
-            max_wait_server = ctx_buffer_time_remaining( &outbuf[0] );
-            max_wait_client = ctx_buffer_time_remaining( &outbuf[1] );
-
-            max_wait = (unsigned) -1;
-
-            if( max_wait_server == 0 )
-                ctx_buffer_flush( &outbuf[0] );
-            else
-                max_wait = max_wait_server;
-
-            if( max_wait_client == 0 )
-                ctx_buffer_flush( &outbuf[1] );
-            else
-            {
-                if( max_wait_client < max_wait )
-                    max_wait = max_wait_client;
-            }
-
-            if( max_wait != (unsigned) -1 )
-            {
-                tm.tv_sec  = max_wait / 1000;
-                tm.tv_usec = ( max_wait % 1000 ) * 1000;
-
-                tm_ptr = &tm;
-            }
-            else
-            {
-                tm_ptr = NULL;
-            }
-        }
-#endif /* MBEDTLS_TIMING_C */
-
-        FD_ZERO( &read_fds );
-        FD_SET( server_fd.fd, &read_fds );
-        FD_SET( client_fd.fd, &read_fds );
-        FD_SET( listen_fd.fd, &read_fds );
-
-        if( ( ret = select( nb_fds, &read_fds, NULL, NULL, tm_ptr ) ) < 0 )
-        {
-            perror( "select" );
-            goto exit;
-        }
-
-        if( FD_ISSET( listen_fd.fd, &read_fds ) )
-            goto accept;
-
-        if( FD_ISSET( client_fd.fd, &read_fds ) )
-        {
-            if( ( ret = handle_message( "S <- C",
-                                        &server_fd, &client_fd ) ) != 0 )
-                goto accept;
-        }
-
-        if( FD_ISSET( server_fd.fd, &read_fds ) )
-        {
-            if( ( ret = handle_message( "S -> C",
-                                        &client_fd, &server_fd ) ) != 0 )
-                goto accept;
-        }
-
-    }
-
-    exit_code = MBEDTLS_EXIT_SUCCESS;
-
-exit:
-
-#ifdef MBEDTLS_ERROR_C
-    if( exit_code != MBEDTLS_EXIT_SUCCESS )
-    {
-        char error_buf[100];
-        mbedtls_strerror( ret, error_buf, 100 );
-        mbedtls_printf( "Last error was: -0x%04X - %s\n\n", (unsigned int) -ret, error_buf );
-        fflush( stdout );
-    }
-#endif
-
-    for( delay_idx = 0; delay_idx < MAX_DELAYED_HS; delay_idx++ )
-    {
-        mbedtls_free( opt.delay_cli[delay_idx] );
-        mbedtls_free( opt.delay_srv[delay_idx] );
-    }
-
-    mbedtls_net_free( &client_fd );
-    mbedtls_net_free( &server_fd );
-    mbedtls_net_free( &listen_fd );
-
-#if defined(_WIN32)
-    mbedtls_printf( "  Press Enter to exit this program.\n" );
-    fflush( stdout ); getchar();
-#endif
-
-    mbedtls_exit( exit_code );
-}
-
-#endif /* MBEDTLS_NET_C */