Don't preserve the read filter from file to file - you won't necessarily

want to read the next file with the same filter that you used on the
last file.

In the "File/Open" dialog box, parse the read filter before trying to
open the file, and if the parse fails, leave the dialog box up so the
user still has the filter and file name around and can try to fix the
problem.

Keep the compiled read filter attached to the "capture_file" structure,
so you don't have to reparse it on a "File/Reload".

svn path=/trunk/; revision=497

1 files changed, 15 insertions, 25 deletions

diff --git a/file.c b/file.c
index eef502af0c..e0e8774871 100644
--- a/file.c
+++ b/file.c
@@ -1,7 +1,7 @@
 /* file.c
  * File I/O routines
  *
- * $Id: file.c,v 1.72 1999/08/15 07:28:23 gram Exp $
+ * $Id: file.c,v 1.73 1999/08/15 19:18:45 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -89,8 +89,6 @@ guint cap_input_id;
 static guint32 firstsec, firstusec;
 static guint32 prevsec, prevusec;
 
-static dfilter *rfcode = NULL; 
-
 static void wtap_dispatch_cb(u_char *, const struct wtap_pkthdr *, int,
     const u_char *);
 
@@ -167,6 +165,10 @@ close_cap_file(capture_file *cf, void *w, guint context) {
     fd_next = fd->next;
     g_free(fd);
   }
+  if (cf->rfcode != NULL) {
+    dfilter_destroy(cf->rfcode);
+    cf->rfcode = NULL;
+  }
   cf->plist = NULL;
   cf->plist_end = NULL;
   unselect_packet(cf);	/* nothing to select */
@@ -187,10 +189,12 @@ close_cap_file(capture_file *cf, void *w, guint context) {
 }
 
 int
-read_cap_file(char *rfilter, capture_file *cf) {
+read_cap_file(capture_file *cf) {
   gchar  *name_ptr, *load_msg, *load_fmt = " Loading: %s...";
   gchar  *done_fmt = " File: %s  Drops: %d";
+#if 0
   gchar  *err_fmt  = " Error: Could not load '%s'";
+#endif
   gint    timeout;
   size_t  msg_len;
 
@@ -199,15 +203,6 @@ read_cap_file(char *rfilter, capture_file *cf) {
   else
     name_ptr++;
 
-  if (rfilter) {
-    rfcode = dfilter_new();
-    if (dfilter_compile(rfcode, rfilter) != 0) {
-      simple_dialog(ESD_TYPE_WARN, NULL,
-        "Unable to parse filter string \"%s\".", rfilter);
-      goto fail;
-    }
-  }
-
   load_msg = g_malloc(strlen(name_ptr) + strlen(load_fmt) + 2);
   sprintf(load_msg, load_fmt, name_ptr);
   gtk_statusbar_push(GTK_STATUSBAR(info_bar), file_ctx, load_msg);
@@ -237,13 +232,6 @@ read_cap_file(char *rfilter, capture_file *cf) {
   gtk_statusbar_push(GTK_STATUSBAR(info_bar), file_ctx, load_msg);
   g_free(load_msg);
 
-/*  name_ptr[-1] = '\0';  Why is this here? It causes problems with capture files */
-
-  /* Remember the new read filter string. */
-  if (cf->rfilter != NULL)
-    g_free(cf->rfilter);
-  cf->rfilter = rfilter;
-
   /* Enable menu items that make sense if you have a capture. */
   set_menu_sensitivity("/File/Close", TRUE);
   set_menu_sensitivity("/File/Reload", TRUE);
@@ -252,15 +240,17 @@ read_cap_file(char *rfilter, capture_file *cf) {
   set_menu_sensitivity("/Tools/Summary", TRUE);
   return 0;
 
+#if 0
+  /* XXX - need to check whether the read succeeded. */
 fail:
   msg_len = strlen(name_ptr) + strlen(err_fmt) + 2;
   load_msg = g_malloc(msg_len);
   snprintf(load_msg, msg_len, err_fmt, name_ptr);
   gtk_statusbar_push(GTK_STATUSBAR(info_bar), file_ctx, load_msg);
   g_free(load_msg);
-  if (rfilter != NULL)
-    g_free(rfilter);	/* assumed to be "g_strdup()"ed, if not null */
+  close_cap_file(cf);	/* Close the capture file. */
   return -1;
+#endif
 }
 
 #ifdef HAVE_LIBPCAP
@@ -546,11 +536,11 @@ wtap_dispatch_cb(u_char *user, const struct wtap_pkthdr *phdr, int offset,
   fdata->cinfo = NULL;
 
   passed = TRUE;
-  if (rfcode) {
-	  if (DFILTER_CONTAINS_FILTER(rfcode)) {
+  if (cf->rfcode) {
+	  if (DFILTER_CONTAINS_FILTER(cf->rfcode)) {
 	    protocol_tree = proto_tree_create_root();
 	    dissect_packet(buf, fdata, protocol_tree);
-	    passed = dfilter_apply(rfcode, protocol_tree, cf->pd);
+	    passed = dfilter_apply(cf->rfcode, protocol_tree, cf->pd);
 	    proto_tree_free(protocol_tree);
 	  }
   }