1 files changed, 83 insertions, 0 deletions
diff --git a/wiretap/tnef.c b/wiretap/tnef.c
new file mode 100644
index 00000000..a7b17c3a
--- /dev/null
+++ b/wiretap/tnef.c
@@ -0,0 +1,83 @@
+/* tnef.c
+ *
+ * Transport-Neutral Encapsulation Format (TNEF) file reading
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include "wtap-int.h"
+#include "file_wrappers.h"
+#include <wsutil/buffer.h>
+#include "tnef.h"
+
+static int tnef_file_type_subtype = -1;
+
+void register_tnef(void);
+
+wtap_open_return_val tnef_open(wtap *wth, int *err, gchar **err_info)
+{
+  guint32 magic;
+
+  if (!wtap_read_bytes(wth->fh, &magic, sizeof magic, err, err_info))
+    return (*err != WTAP_ERR_SHORT_READ) ? WTAP_OPEN_ERROR : WTAP_OPEN_NOT_MINE;
+
+  if (GUINT32_TO_LE(magic) != TNEF_SIGNATURE)
+     /* Not a tnef file */
+     return WTAP_OPEN_NOT_MINE;
+
+  /* seek back to the start of the file  */
+  if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
+    return WTAP_OPEN_ERROR;
+
+  wth->file_type_subtype = tnef_file_type_subtype;
+  wth->file_encap = WTAP_ENCAP_TNEF;
+  wth->snapshot_length = 0;
+
+  wth->subtype_read = wtap_full_file_read;
+  wth->subtype_seek_read = wtap_full_file_seek_read;
+  wth->file_tsprec = WTAP_TSPREC_SEC;
+
+  return WTAP_OPEN_MINE;
+}
+
+static const struct supported_block_type tnef_blocks_supported[] = {
+  /*
+   * This is a file format that we dissect, so we provide only one
+   * "packet" with the file's contents, and don't support any
+   * options.
+   */
+  { WTAP_BLOCK_PACKET, ONE_BLOCK_SUPPORTED, NO_OPTIONS_SUPPORTED }
+};
+
+static const struct file_type_subtype_info tnef_info = {
+  "Transport-Neutral Encapsulation Format", "tnef", NULL, NULL,
+  FALSE, BLOCKS_SUPPORTED(tnef_blocks_supported),
+  NULL, NULL, NULL
+};
+
+void register_tnef(void)
+{
+  tnef_file_type_subtype = wtap_register_file_type_subtype(&tnef_info);
+
+  /*
+   * Register name for backwards compatibility with the
+   * wtap_filetypes table in Lua.
+   */
+  wtap_register_backwards_compatibility_lua_name("TNEF",
+                                                 tnef_file_type_subtype);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local Variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=2:tabSize=8:noTabs=true:
+ */