Hi !
### Description
I have а scenario where dialogs are saved at kamailio shutdown and loaded at
startup, the dialog module related configuration:
modparam("dialog", "db_url", DBURL)
modparam("dialog", "db_mode", 3)
When kamailio shut down first time all dialogs a saved in DB, upon startup they
loaded as expected, but when in some resonable short time kamailio shutdowned
again with active dialogs loaded at startup, they not saved in DB.
I think this happens because the dialog dflags in load_dialog_info_from_db
function set to zero after dialog loaded, so
in update_dialog_dbinfo_unsafe such dialogs are ignored (no DLG_FLAG_NEW, no
DLG_FLAG_CHANGED set).
#### Debugging Data
Before shutdown:
kamcmd> dlg.list
{
h_entry: 521
h_id: 11463
ref: 2
call-id: 7z32YR9BCg
from_uri: sip:XXXXX@[XXXX:XXXX:b081:1320::1:2c]
to_uri: sip:YYYYY@[XXXX:XXXX:0:201d::a1]
state: 4
start_ts: 1702137597
init_ts: 1702137595
end_ts: 0
duration: 18
timeout: 1702144797
lifetime: 7200
**dflags: 643**
sflags: 0
iflags: 0
.....
After startup:
kamcmd> dlg.list
{
h_entry: 521
h_id: 11463
ref: 2
call-id: 7z32YR9BCg
from_uri: sip:XXXXX@[XXXX:XXXX:b081:1320::1:2c]
to_uri: sip:YYYYY@[XXXX:XXXX:0:201d::a1]
state: 4
start_ts: 1702137597
init_ts: 1702137636
end_ts: 0
duration: 46
timeout: 1702144798
lifetime: 7201
**dflags: 0**
sflags: 0
iflags: 0
....
### Possible Solutions
At first glance, it's easy to set dlg->flags = DLG_FLAG_CHANGED (or may be to
DLG_FLAG_NEW|DLG_FLAG_CHANGED) after loading from the database in
load_dialog_info_from_db function, but I'm not sure if this could break
anything else (e.g. DMQ).
### Additional Information
* **Kamailio Version** - kamailio 5.7.2 (x86_64/linux)
* **Operating System**:
Ubuntu 18.04.6 LTS
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