Currently, in notify_send_and_recv function, pupnp waits for
HTTP_DEFAULT_TIMEOUT seconds when trying to send a GENA notification.
When there is a lot of notifications with CPs which was disconnected
without unsusbcribing, all the pupnp threads are blocked on this
timeout. To correct, this issue, this patch adds a new variable,
GENA_NOTIFICATION_SENDING_TIMEOUT, which can be used to lower the
timeout so GENA threads return quickly when writing is impossible. By
the same mean, pupnp waits the CP's answer to the NOTIFY for
HTTP_DEFAULT_TIMEOUT seconds, so this patch adds a new variable,
GENA_NOTIFICATION_ANSWERING_TIMEOUT, to customize this value.
Currently, pupnp is using a blocking connect to sends GENA
notifications. As a result, when there is a lot of notifications with
CPs which were disconnected without unsusbcribing, all the pupnp
threads are blocked for 20s (timeout). To correct this issue, this
patch replace the call to connect with a call to private_connect and add
a compilation flag to disable blocking TCP connections, so if we are not
able to connect to the CP, the notification is lost.
On win32 socket() returns INVALID_SOCKET, which is unsigned,
on error, not -1.
Also, most network functions return SOCKET_ERROR.
This patch tries to make the usage consistent.
Fix for bug introduced in samples code in svn revision 502, commit
git:25c908c558c8e60eb386c155a6b93add447ffec0
Sample device and combo were aborting with the message:
"***** SampleUtil_Initialize was called multiple times!"
Put the loop to send multiple copies of each SSDP advertisements in
ssdp_server.c instead of ssdp_device.c so we have only one call to
imillisleep ( SSDP_PAUSE ) to speed up advertisements.
Previously, NUM_COPY was used in ssdp_device.c to send multiple copies
of each advertisements but also multiple replies to each M-SEARCH
request. As sending multiple replies is not compliant with HTTPU/MU
spec, NUM_COPY has been set to 1 in an older patch. However, as this
variable is not needed and has been replaced with SSDP_COPY, it has
been removed.
Currently, SSDP_COPY is used only to send multiple M-SEARCH requests (in
ssdp_ctrlpt.c). With this patch, SSDP_COPY is also used to send multiple
copies of each advertisements packets (in ssdp_device.c).
By "Carl Benson" <carl.benson@windriver.com>:
I had to do some modifications myself though, because the Android
build system insists on having a file named "util.h" taking precedence
in its include path, libupnp gets confused because of the same filename
in upnp/src/inc/util.h
Fix a bug in miniserver.c, in which maxMiniSock was wrongly declared as
unsigned int and as a result it was beeng set to ((unsigned int)(-1)).
As a result, after beeing incremented, it became zero, and this value
was beeing used in the select() call.
Thanks to Fabrice Fontaine for helping and testing with this issue.
the sleep() call, it was just a workaround.
SF Bug Tracker [ 3086852 ] 99% CPU loop in miniserver.c on a non ipv6
system.
Submitted by: Jin ( jin_eld ) - 2010-10-13 19:29:13 UTC
I cross compiled libupnp 1.6.7 for ARM9 using the --disable-ipv6
option, my system is an ipv4 only setup.
I do not know why this problem only appears when running the app in the
background (for instance using nohup &), but then it starts using 99%
CPU.
I traced the problem down to the select() call in miniserver.c in the
RunMiniServer() function. Select returns code 1, but errno is set to
"Socket operation on non-socket", I also see this when running my app
under strace.
I set all ...Sock6 variables to INVALID_SOCKET to make sure that they
do not get added to the FD_SET and the problem is gone.
Adding a configure flag to disable GENA notification reordering as even
with an imillisleep(1), this mechanism consumes too much CPU on embedded
devices when there is a burst of notifications.
When a device with embedded devices (like IGD) when created and one of
the embedded devices did not have any service, there was a Segmentation
Fault (see SF Tracker [ 2688125 ]).
When a lot of notifications were generated by a device in a short
period of time then 100% of the CPU was used to reorder those
notifications by pushing back the thread in the job queue. This
mechanism has been modified so now thread sleep 1 ms before being
pushed back into the job queue.
Removing DEFAULT_SCHED_PARAM parameter and use
sched_get_priority_min(DEFAULT_POLICY) instead.
Devices must respond to M-SEARCH requests for any supported version and the
response should specify the same version as was contained in the search target.
Previously, the device did not answer if the M-SEARCH request did not
contain the same version number than the version number of the device.
This patch adds the WEB_SERVER_CONTENT_LANGUAGE parameter so the user can specify
the language used by the device during Description and Presentation steps of UPnP
through the HTTP CONTENT-LANGUAGE header.
By default, the WEB_SERVER_CONTENT_LANGUAGE is an empty string so no
CONTENT-LANGUAGE is added.
This patch allows a user to customize the stack size of the threads used by
pupnp through the new THREAD_STACK_SIZE variable. This is especially useful
on embedded systems with limited memory where the user can set THREAD_STACK_SIZE
to ITHREAD_STACK_MIN.
However, as this modification can have side effects, I set 0 as the default
value, so threads will continue to use the default stack size of the system
(which varies greatly as stated in
https://computing.llnl.gov/tutorials/pthreads/).
