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Author christian.heimes
Recipients alex, christian.heimes, dstufft, janssen, martin.panter, njs
Date 2017-09-06.14:11:38
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Marked as misclassified Yes
Message-id <>
If I understand the man page of SSL_shutdown correctly, than SSL_shutdown() must be called a second time when the first time returned 0. But it does not say how an application shall behave if the second call to SSL_shutdown() also returns 0.

OpenSSL does not contain an example for bidirectional shutdown. s_client.c only does unidirectional shutdown.

cURL just ignores the result:

 * This function is called when an SSL connection is closed.
void Curl_ossl_close(struct connectdata *conn, int sockindex)
  struct ssl_connect_data *connssl = &conn->ssl[sockindex];

  if(connssl->handle) {

    SSL_free (connssl->handle);
    connssl->handle = NULL;
  if(connssl->ctx) {
    SSL_CTX_free (connssl->ctx);
    connssl->ctx = NULL;
Date User Action Args
2017-09-06 14:11:38christian.heimessetrecipients: + christian.heimes, janssen, alex, njs, martin.panter, dstufft
2017-09-06 14:11:38christian.heimessetmessageid: <>
2017-09-06 14:11:38christian.heimeslinkissue30437 messages
2017-09-06 14:11:38christian.heimescreate