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Modify example server to be resilient to WANT_WRITE errors.

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This commit is contained in:
Hayden Roche
2020-11-02 14:57:37 -06:00
parent e035eb8f8a
commit 2fc594d319
2 changed files with 22 additions and 13 deletions
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6
examples/client/client.c
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@@ -184,15 +184,15 @@ static int NonBlockingSSL_Connect(WOLFSSL* ssl)
else
#endif
{
#ifdef WOLFSSL_DTLS
currTimeout = wolfSSL_dtls_get_current_timeout(ssl);
#endif
if (error == WOLFSSL_ERROR_WANT_WRITE) {
select_ret = tcp_select_tx(sockfd, currTimeout);
}
else
{
#ifdef WOLFSSL_DTLS
currTimeout = wolfSSL_dtls_get_current_timeout(ssl);
#endif
select_ret = tcp_select(sockfd, currTimeout);
}
}

29
examples/server/server.c
View File

@@ -137,7 +137,6 @@ static int lng_index = 0;
}
#endif
static void err_sys_ex(int out, const char* msg)
{
if (out == 1) { /* if server is running w/ -x flag, print error w/o exit */
@@ -312,7 +311,11 @@ static int NonBlockingSSL_Accept(SSL* ssl)
else
#endif
{
if (error != WOLFSSL_ERROR_WANT_WRITE) {
if (error == WOLFSSL_ERROR_WANT_WRITE)
{
select_ret = tcp_select_tx(sockfd, currTimeout);
}
else {
#ifdef WOLFSSL_DTLS
currTimeout = wolfSSL_dtls_get_current_timeout(ssl);
#endif
@@ -333,12 +336,6 @@ static int NonBlockingSSL_Accept(SSL* ssl)
srvHandShakeCB, srvTimeoutCB, srvTo);
#endif
error = SSL_get_error(ssl, 0);
if (error == WOLFSSL_ERROR_WANT_WRITE) {
/* Do a select here. */
select_ret = tcp_select_tx(sockfd, 1);
if (select_ret == TEST_TIMEOUT)
error = WOLFSSL_FATAL_ERROR;
}
}
else if (select_ret == TEST_TIMEOUT && !wolfSSL_dtls(ssl)) {
error = WOLFSSL_ERROR_WANT_READ;
@@ -694,6 +691,7 @@ static const char* server_usage_msg[][56] = {
#ifdef HAVE_TRUSTED_CA
"-5 Use Trusted CA Key Indication\n", /* 53 */
#endif
"-6 Simulate WANT_WRITE errors on every other IO send\n",
#ifdef HAVE_CURVE448
"-8 Pre-generate Key share using Curve448 only\n", /* 55 */
#endif
@@ -984,6 +982,7 @@ THREAD_RETURN WOLFSSL_THREAD server_test(void* args)
int needDH = 0;
int useNtruKey = 0;
int nonBlocking = 0;
int simulateWantWrite = 0;
int fewerPackets = 0;
#ifdef HAVE_PK_CALLBACKS
int pkCallbacks = 0;
@@ -1157,8 +1156,8 @@ THREAD_RETURN WOLFSSL_THREAD server_test(void* args)
while ((ch = mygetopt(argc, argv, "?:"
"abc:defgijk:l:mnop:q:rstuv:wxy"
"A:B:C:D:E:FGH:IJKL:MNO:PQR:S:TUVYZ:"
"01:23:4:58"
"@#")) != -1) {
"01:23:4:568"
"@#")) != -1) {
switch (ch) {
case '?' :
if(myoptarg!=NULL) {
@@ -1549,6 +1548,11 @@ THREAD_RETURN WOLFSSL_THREAD server_test(void* args)
#endif /* HAVE_TRUSTED_CA */
break;
case '6' :
nonBlocking = 1;
simulateWantWrite = 1;
break;
case '8' :
#ifdef HAVE_CURVE448
useX448 = 1;
@@ -1730,6 +1734,11 @@ THREAD_RETURN WOLFSSL_THREAD server_test(void* args)
if (ctx == NULL)
err_sys_ex(catastrophic, "unable to get ctx");
if (simulateWantWrite)
{
wolfSSL_CTX_SetIOSend(ctx, SimulateWantWriteIOSendCb);
}
#if defined(HAVE_SESSION_TICKET) && defined(HAVE_CHACHA) && \
defined(HAVE_POLY1305)
if (TicketInit() != 0)