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Change the default IP addresses for DTLS samples

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Changes the IP address to bind to for dtls_server.c to be "::" or optionally
"0.0.0.0" if the preprocessor symbol FORCE_IPV4 is defined.

Also changes the destinaton IP address for dtls_client.c to be "::1" or if
FORCE_IPV4 symbol is defined "127.0.0.1".

This change allows on compilation dtls_server.c and dtls_client.c to both be
compiled to use either IPv4 or IPv6 so out of the box they will work together
without problem, and to avoid dtls_server.c binding to IPv6 and dtls_client.c
binding to IPv4.
This commit is contained in:
Simon Butcher 2018-05-12 18:23:32 +01:00
parent 5bcbd4e7f4
commit 714b7c60b1
2 changed files with 20 additions and 2 deletions
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11
programs/ssl/dtls_client.c
View File

@ -60,9 +60,18 @@ int main( void )
#include "mbedtls/certs.h"
#include "mbedtls/timing.h"
/* Uncomment out the following line to default to IPv4 and disable IPv6 */
//#define FORCE_IPV4
#define SERVER_PORT "4433"
#define SERVER_NAME "localhost"
#define SERVER_ADDR "127.0.0.1" /* forces IPv4 */
#ifdef FORCE_IPV4
#define SERVER_ADDR "127.0.0.1" /* Forces IPv4 */
#else
#define SERVER_ADDR "::1"
#endif
#define MESSAGE "Echo this"
#define READ_TIMEOUT_MS 1000

11
programs/ssl/dtls_server.c
View File

@ -33,6 +33,15 @@
#define mbedtls_fprintf fprintf
#endif
/* Uncomment out the following line to default to IPv4 and disable IPv6 */
//#define FORCE_IPV4
#ifdef FORCE_IPV4
#define BIND_IP "0.0.0.0" /* Forces IPv4 */
#else
#define BIND_IP "::"
#endif
#if !defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) || \
!defined(MBEDTLS_SSL_COOKIE_C) || !defined(MBEDTLS_NET_C) || \
!defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
@ -169,7 +178,7 @@ int main( void )
printf( " . Bind on udp/*/4433 ..." );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_UDP ) ) != 0 )
if( ( ret = mbedtls_net_bind( &listen_fd, BIND_IP, "4433", MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
goto exit;