1 files changed, 127 insertions, 0 deletions
diff --git a/src/header_buffer_struct.c b/src/header_buffer_struct.c
new file mode 100644
index 0000000..94f852b
--- /dev/null
+++ b/src/header_buffer_struct.c
@@ -0,0 +1,127 @@
+/*
+ * active port forwarder - software for secure forwarding
+ * Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "header_buffer_struct.h"
+
+/*
+ * Function name: HeaderBuffer_new
+ * Description: Create and initialize new HeaderBuffer structure.
+ * Returns: Pointer to newly created HeaderBuffer structure.
+ */
+
+HeaderBuffer*
+HeaderBuffer_new()
+{
+  HeaderBuffer* tmp = calloc(1, sizeof(HeaderBuffer));
+  assert(tmp != NULL);
+  if (tmp == NULL) {
+    return NULL;
+  }
+  return tmp;
+}
+
+/*
+ * Function name: HeaderBuffer_free
+ * Description: Free the memory allocated for HeaderBuffer structure.
+ * Arguments: hb - pointer to pointer to HeaderBuffer structure
+ */
+
+void
+HeaderBuffer_free(HeaderBuffer** hb)
+{
+  assert(hb != NULL);
+  if (hb == NULL) {
+    return;
+  }
+  assert((*hb) != NULL);
+  if ((*hb) == NULL) {
+    return;
+  }
+  free((*hb));
+  (*hb) = NULL;
+}
+
+/*
+ * Function name: HeaderBuffer_to_read
+ * Description: Evaluate how much bytes are needed to fill the header buffer.
+ * Arguments: hb - pointer to HeaderBuffer structure
+ * Returns: How much bytes are needed to fill the header buffer.
+ */
+
+int
+HeaderBuffer_to_read(HeaderBuffer* hb)
+{
+  assert(hb != NULL);
+  if (hb == NULL) {
+    return -1;
+  }
+  return (5 - hb->readed);
+}
+
+/*
+ * Function name: HeaderBuffer_store
+ * Description: Store readed part of the header in the buffer.
+ * Arguments: hb - pointer to HeaderBuffer structure
+ *            buff - reader bytes
+ *            n - how much bytes were readed
+ */
+
+void
+HeaderBuffer_store(HeaderBuffer* hb, unsigned char* buff, int n)
+{
+  assert(hb != NULL);
+  if (hb == NULL) {
+    return;
+  }
+  assert((hb->readed + n) <= 5);
+  if ((hb->readed + n) > 5) {
+    return;
+  }
+  assert(n > 0);
+  if (n <= 0) {
+    return;
+  }
+  memcpy(&hb->tab[hb->readed], buff, n);
+  hb->readed += n;
+}
+
+/*
+ * Function name: HeaderBuffer_restore
+ * Description: Restore the full header from the buffer. It's not checked, if the full header is in the buffer.
+ * Arguments: hb - pointer to HeaderBuffer structure
+ *            buff - place to restore the full header to
+ */
+
+void
+HeaderBuffer_restore(HeaderBuffer* hb, unsigned char* buff)
+{
+  assert(hb != NULL);
+  if (hb == NULL) {
+    return;
+  }
+  memcpy(buff, hb->tab, 5);
+  hb->readed = 0;
+}