Refactor Wiretap

Start of refactoring Wiretap and breaking structures down into "generally useful fields for dissection" and "capture specific". Since this in intended as a "base" for Wiretap and Filetap, the "wft" prefix is used for "common" functionality.

The "architectural" changes can be found in cfile.h, wtap.h, wtap-int.h and (new file) wftap-int.h. Most of the other (painstaking) changes were really just the result of compiling those new architecture changes.

bug:9607
Change-Id: Ife858a61760d7a8a03be073546c0e7e582cab2ae
Reviewed-on: https://code.wireshark.org/review/1485
Reviewed-by: Michael Mann <mmann78@netscape.net>

1 files changed, 24 insertions, 20 deletions

diff --git a/wiretap/tnef.c b/wiretap/tnef.c
index 5bd2fa1463..240a5fbcc5 100644
--- a/wiretap/tnef.c
+++ b/wiretap/tnef.c
@@ -25,18 +25,19 @@
 #include <sys/stat.h>
 #endif
 
+#include "wftap-int.h"
 #include "wtap-int.h"
 #include "file_wrappers.h"
 #include "buffer.h"
 #include "tnef.h"
 
-static gboolean tnef_read_file(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
+static gboolean tnef_read_file(wftap *wfth, FILE_T fh, struct wtap_pkthdr *phdr,
                                Buffer *buf, int *err, gchar **err_info)
 {
   gint64 file_size;
   int packet_size;
 
-  if ((file_size = wtap_file_size(wth, err)) == -1)
+  if ((file_size = wftap_file_size(wfth, err)) == -1)
     return FALSE;
 
   if (file_size > WTAP_MAX_PACKET_SIZE) {
@@ -46,7 +47,7 @@ static gboolean tnef_read_file(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
      */
     *err = WTAP_ERR_BAD_FILE;
     *err_info = g_strdup_printf("tnef: File has %" G_GINT64_MODIFIER "d-byte packet, bigger than maximum of %u",
-				file_size, WTAP_MAX_PACKET_SIZE);
+                                file_size, WTAP_MAX_PACKET_SIZE);
     return FALSE;
   }
   packet_size = (int)file_size;
@@ -62,13 +63,14 @@ static gboolean tnef_read_file(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
   return wtap_read_packet_bytes(fh, buf, packet_size, err, err_info);
 }
 
-static gboolean tnef_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
+static gboolean tnef_read(wftap *wfth, int *err, gchar **err_info, gint64 *data_offset)
 {
   gint64 offset;
+  wtap* wth = (wtap*)wfth->tap_specific_data;
 
   *err = 0;
 
-  offset = file_tell(wth->fh);
+  offset = file_tell(wfth->fh);
 
   /* there is only ever one packet */
   if (offset)
@@ -76,33 +78,35 @@ static gboolean tnef_read(wtap *wth, int *err, gchar **err_info, gint64 *data_of
 
   *data_offset = offset;
 
-  return tnef_read_file(wth, wth->fh, &wth->phdr, wth->frame_buffer, err, err_info);
+  return tnef_read_file(wfth, wfth->fh, &wth->phdr, wfth->frame_buffer, err, err_info);
 }
 
-static gboolean tnef_seek_read(wtap *wth, gint64 seek_off,
-                               struct wtap_pkthdr *phdr,
+static gboolean tnef_seek_read(wftap *wfth, gint64 seek_off,
+                               void* header,
                                Buffer *buf, int *err, gchar **err_info)
 {
+  struct wtap_pkthdr *phdr = (struct wtap_pkthdr *)header;
+
   /* there is only one packet */
   if(seek_off > 0) {
     *err = 0;
     return FALSE;
   }
 
-  if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
+  if (file_seek(wfth->random_fh, seek_off, SEEK_SET, err) == -1)
     return FALSE;
 
-  return tnef_read_file(wth, wth->random_fh, phdr, buf, err, err_info);
+  return tnef_read_file(wfth, wfth->random_fh, phdr, buf, err, err_info);
 }
 
-int tnef_open(wtap *wth, int *err, gchar **err_info)
+int tnef_open(wftap *wfth, int *err, gchar **err_info)
 {
   int bytes_read;
   guint32 magic;
 
-  bytes_read = file_read(&magic, sizeof magic, wth->fh);
+  bytes_read = file_read(&magic, sizeof magic, wfth->fh);
   if (bytes_read != sizeof magic) {
-    *err = file_error(wth->fh, err_info);
+    *err = file_error(wfth->fh, err_info);
     return (*err != 0) ? -1 : 0;
   }
 
@@ -111,16 +115,16 @@ int tnef_open(wtap *wth, int *err, gchar **err_info)
      return 0;
 
   /* seek back to the start of the file  */
-  if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
+  if (file_seek(wfth->fh, 0, SEEK_SET, err) == -1)
     return -1;
 
-  wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_TNEF;
-  wth->file_encap = WTAP_ENCAP_TNEF;
-  wth->snapshot_length = 0;
+  wfth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_TNEF;
+  wfth->file_encap = WTAP_ENCAP_TNEF;
+  wfth->snapshot_length = 0;
 
-  wth->subtype_read = tnef_read;
-  wth->subtype_seek_read = tnef_seek_read;
-  wth->tsprecision = WTAP_FILE_TSPREC_SEC;
+  wfth->subtype_read = tnef_read;
+  wfth->subtype_seek_read = tnef_seek_read;
+  wfth->tsprecision = WTAP_FILE_TSPREC_SEC;
 
   return 1;
 }