Add a macro to catch unhandled openssl errors.

svn:r1723

src/common/tortls.c

@@ -618,6 +618,18 @@ unsigned long tor_tls_get_n_bytes_written(tor_tls *tls)
   return BIO_number_written(SSL_get_wbio(tls->ssl));
 }
 
+void _assert_no_tls_errors(const char *fname, int line)
+{
+  if (ERR_peek_error() == 0)
+    return;
+  log_fn(LOG_ERR, "Unhandled OpenSSL errors found at %s:%d: ",
+         fname, line);
+  tls_log_errors(LOG_ERR, NULL);
+
+  tor_assert(0);
+}
+
+
 /*
   Local Variables:
   mode:c

src/common/tortls.h

@@ -33,6 +33,10 @@ int tor_tls_get_pending_bytes(tor_tls *tls);
 unsigned long tor_tls_get_n_bytes_read(tor_tls *tls);
 unsigned long tor_tls_get_n_bytes_written(tor_tls *tls);
 
+#define assert_no_tls_errors() _assert_no_tls_errors(__FILE__,__LINE__);
+
+void _assert_no_tls_errors(const char *fname, int line);
+
 #endif
 
 /*

src/or/buffers.c

@@ -221,7 +221,7 @@ int read_to_buf_tls(tor_tls *tls, int at_most, buf_t *buf) {
          tor_tls_get_pending_bytes(tls), at_most);
 
   if (buf_ensure_capacity(buf, at_most+buf->datalen))
-    return -1;
+    return TOR_TLS_ERROR;
 
   if (at_most > buf->len - buf->datalen)
     at_most = buf->len - buf->datalen;
@@ -231,6 +231,8 @@ int read_to_buf_tls(tor_tls *tls, int at_most, buf_t *buf) {
 
   log_fn(LOG_DEBUG,"before: %d on buf, %d pending, at_most %d.",(int)buf_datalen(buf),
          tor_tls_get_pending_bytes(tls), at_most);
+
+  assert_no_tls_errors();
   r = tor_tls_read(tls, buf->mem+buf->datalen, at_most);
   if (r<0)
     return r;