wiretap: generate fake IDBs for more capture file types.

That makes them work as input to a mergecap that writes pcapng files.

File types that don't have a single per-file encapsulation type need
more work, with multiple fake IDBs, one for each packet encapsulation
type seen in the file, unless we can generate real IDBs.

Change-Id: I2859e4f7fb15ec0c0f31a4044dc15638e5db7826
Reviewed-on: https://code.wireshark.org/review/37983
Petri-Dish: Guy Harris <gharris@sonic.net>
Tested-by: Petri Dish Buildbot
Reviewed-by: Guy Harris <gharris@sonic.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/wiretap/iseries.c b/wiretap/iseries.c
index b5e9ca6f5d..abac53aaef 100644
--- a/wiretap/iseries.c
+++ b/wiretap/iseries.c
@@ -250,6 +250,15 @@ iseries_open (wtap * wth, int *err, gchar ** err_info)
           {
             return WTAP_OPEN_ERROR;
           }
+
+        /*
+         * Add an IDB; we don't know how many interfaces were
+         * involved, so we just say one interface, about which
+         * we only know the link-layer type, snapshot length,
+         * and time stamp resolution.
+         */
+        wtap_add_generated_idb(wth);
+
         return WTAP_OPEN_MINE;
       }
       offset += 1;
@@ -290,6 +299,15 @@ iseries_open (wtap * wth, int *err, gchar ** err_info)
               {
                 return WTAP_OPEN_ERROR;
               }
+
+            /*
+             * Add an IDB; we don't know how many interfaces were
+             * involved, so we just say one interface, about which
+             * we only know the link-layer type, snapshot length,
+             * and time stamp resolution.
+             */
+            wtap_add_generated_idb(wth);
+
             return WTAP_OPEN_MINE;
           }
         offset += 1;