This is a snip from the user's mailing list, I'm just adding it to the issue tracker, as it is yet to be confirmed as a bug, only here for tracking pruporses:
```
I have a situation where I have 2 devices registering with the same AOR, I have the registrar module's max_contacts parameter set to 1 and I use the 0x04 flag on the save function.
When I use dmq_usrloc for replication, I can see 2 contacts registered for the AOR on the "client" nodes whereas the node where the actual registration took place only has 1 contact for the AOR.
```
```
It seems to me like another bug, although again I'm not familiar with the module so can't be sure without looking that it is not intended behaviour.
I plan to look later this week when I have some time but in the meantime, you can send me the examples directly if you like.
```
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Kamailio takes care of sending in-dialog keep-alives using OPTIONS when dlg_set_attribute ka-src and ka-dst is used. It also sends OPTIONS to correct address if a client sends Re-Invite indicating a network change, which is a common case with mobile clients (switching between mobile-data and Wifi) fixed in #273
The problem is that it ends the dialog on missing even one keep-alive response. Missing a response is possible when the client is handling the network change and keep-alive is sent around that time.
Thus, having a configurable counter after which you expect to end the dialog might be helpful. For eg. you decide to end the dialog after we miss 3 responses for keep-alives in a row.
Something like dlg_set_attribute(ka-src, 3) where 3 indicates the number of responses that can be missed before ending the dialog.
---
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if server_address & notification_address use same ip and different port(see below),in dmq.list_nodes will have two node for one kamailio(one node for notify_server 5360 and one for dmq local 5260), question is when send REGISTER to port 5160, REGISTER will copy from port 5260 to 5360 on the same kamailio,this is not what i want.
dmq & dmq_usrloc cfg(**different port**):
listen=eth0:5160
listen=eth0:5260
listen=eth0:5360
modparam("dmq", "server_address", "sip:10.6.1.200:5260")
modparam("dmq", "notification_address", "sip:10.6.1.200:5360")
modparam("dmq", "multi_notify", 1)
modparam("dmq", "num_workers", 2)
# ----- dmq_usrloc params -----
modparam("dmq_usrloc", "enable", 1)
modparam("dmq_usrloc", "sync", 1)
modparam("dmq_usrloc", "batch_msg_contacts", 50)
modparam("dmq_usrloc", "batch_msg_size", 500000)
And when I let server_address & notification_address use same IP & Port, check in function add_server_and_notify will report error("error adding notification node"),child_init will return failed.
So I suggest that the following changes, let server_address & notification_address can use the same IP and port:
@@ -315,11 +315,15 @@ dmq_node_t* add_server_and_notify(str *paddr)
for (index = 0; index < host_cnt; index++) {
pstr->s = puri_list [index];
pstr->len = strlen (puri_list [index]);
- if (!find_dmq_node_uri(node_list, pstr)) { // check for duplicates
+ if (!(pnode = find_dmq_node_uri(node_list, pstr))) { // check for duplicates
pnode = add_dmq_node (node_list, pstr);
if (pnode && !pfirst)
{ pfirst = pnode; }
- }
+ } else {
+ if (!pfirst) {
+ pfirst = pnode;
+ }
+ }
}
}
After Such A change, dmq.list_nodes will only have on node for (notify_server & server_addr(local)).
Is there any problem with this modification? Thanks
$./sbin/kamailio -v
version: kamailio 5.0.1 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
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Kamailio incorrectly routed RPACK packets with topos module enabled. In the same time there is no problem with topoh module enabled.
It's seems like related to #1097,
### Troubleshooting
#### SIP Traffic
<!--
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RPACK SIP packets with Kamailio topos module: http://imgur.com/SScErQp
RPACK SIP packets with Kamailio topoh module: http://imgur.com/45ch3HB
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### Additional Information
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version: kamailio 5.1.0-dev4 (x86_64/linux) (git revision 7dbf3fe)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled on 00:24:21 Jun 26 2017 with gcc 4.8.5
```
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```
Red Hat Enterprise Linux Server release 7.3 (Maipo)
Linux 2.6.32-042stab113.21 #1 SMP Wed Mar 23 11:05:25 MSK 2016 x86_64 x86_64 x86_64 GNU/Linux
```
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> Add "-fno-strict-aliasing" to compilation flags
>
> Fixes a slew of:
> "dereferencing type-punned pointer will break strict-aliasing rules"
> warnings from GCC for lines of the form:
> Py_INCREF(Py_True);
> and
> Py_INCREF(Py_False);
>
> due to the cast from PyIntObject* to PyObject*
>
> GCC is technically correct here; see:
> http://www.python.org/dev/peps/pep-3123/
> though this is unlikely to lead to non-working machine code.
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/924
-- Commit Summary --
* app_python: fix compiler warning
-- File Changes --
M src/modules/app_python/Makefile (2)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/924.patchhttps://github.com/kamailio/kamailio/pull/924.diff
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