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2020-01-01batman-adv: Disable CONFIG_BATMAN_ADV_SYSFS by defaultSven Eckelmann1-1/+0
The sysfs support in batman-adv is deprecated since a while and will be removed completely next year. All tools which were known to the batman-adv development team are supporting the batman-adv netlink interface since a while. Thus disabling CONFIG_BATMAN_ADV_SYSFS by default should not cause problems on most systems. It is still possible to enable it in case it is still required in a specific setup. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2020-01-01batman-adv: Update copyright years for 2020Sven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-09-26net: Fix Kconfig indentationKrzysztof Kozlowski1-5/+5
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-25batman-adv: Make sysfs support optionalSven Eckelmann1-0/+12
The sysfs files will be marked as deprecated in the near future. They are already replaced by the batadv generic netlink family. Add an Kconfig option to disable the sysfs support for users who want to test their tools or want to safe some space. This setting should currently still be enabled by default to keep backward compatible with legacy tools. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-03-25batman-adv: Drop license boilerplateSven Eckelmann1-12/+0
All files got a SPDX-License-Identifier with commit 7db7d9f369a4 ("batman-adv: Add SPDX license identifier above copyright header"). All the required information about the license conditions can be found in LICENSES/. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-01-04batman-adv: Update copyright years for 2019Sven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-11-12batman-adv: enable MCAST by default at compile timeLinus Lüssing1-0/+1
Thanks to rigorous testing in wireless community mesh networks several issues with multicast entries in the translation table were found and fixed in the last 1.5 years. Now we see the first larger networks (a few hundred nodes) with a batman-adv version with multicast optimizations enabled arising, with no TT / multicast optimization related issues so far. Therefore it seems safe to enable multicast optimizations by default. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-11-12batman-adv: Move CRC16 dependency to BATMAN_ADV_BLASven Eckelmann1-1/+1
The commit ced72933a5e8 ("batman-adv: use CRC32C instead of CRC16 in TT code") switched the translation table code from crc16 to crc32c. The (optional) bridge loop avoidance code is the only user of this function. batman-adv should only select CRC16 when it is actually using it. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-11-12batman-adv: Fix description for BATMAN_ADV_DEBUGSven Eckelmann1-2/+3
The debug messages of batman-adv are not printed to the kernel log at all but can be stored (depending on the compile setting) in the tracing buffer or the batadv specific log buffer. There is also no debug module parameter but a batadv netdev specific log_level setting to enable/disable different classes of debug messages at runtime. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-11-12batman-adv: Allow to use BATMAN_ADV_DEBUG without BATMAN_ADV_DEBUGFSSven Eckelmann1-1/+1
The BATMAN_ADV_DEBUGFS portion of batman-adv is marked as deprecated. Thus all required functionality should be available without it. The debug log was already modified to also output via the kernel tracing function but still retained its BATMAN_ADV_DEBUGFS functionality. Separate the entry point for the debug log from the debugfs portions to make it possible to build with BATMAN_ADV_DEBUG and without BATMAN_ADV_DEBUGFS. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-09-15batman-adv: Provide debug messages as trace eventsSven Eckelmann1-0/+11
A private debug logging infrastructure is currently provided via $debug_fs/batman_adv/*/log when CONFIG_BATMAN_ADV_DEBUG is enabled. This is not well integrated in the rest of the tracing infrastructure of the kernel. Other components (like mac80211 or ath10k) allow to gather the debug messages using generic trace events which are better integrated. This makes it possible to interact with them using the existing userspace tools. The tracepoint batadv:batadv_dbg will now be available when CONFIG_BATMAN_ADV_DEBUG and CONFIG_BATMAN_ADV_TRACING is activated. The log level mask is still used for filtering as usual. A full system trace for offline parsing can be created (and read) using: $ batctl ll all $ trace-cmd record -e batadv:batadv_dbg $ trace-cmd report The same can also be done without recording to a file $ batctl ll all $ trace-cmd stream -e batadv:batadv_dbg The trace infrastructure is especially helpful when tracing processes: $ batctl ll all $ ./tools/perf/perf trace --event "batadv:*" batctl p 10.204.32.1 0.000 batadv:batadv_dbg:batman_adv bat0 Parsing outgoing ARP REQUEST 0.045 batadv:batadv_dbg:batman_adv bat0 ARP MSG = [src: a2:64:14:53:f8:22-10.204.32.185 dst: 00:00:00:00:00:00-10.204.32.1] 0.067 batadv:batadv_dbg:batman_adv bat0 Entry updated: 10.204.32.185 a2:64:14:53:f8:22 (vid: -1) 0.099 batadv:batadv_dbg:batman_adv bat0 batadv_dat_select_candidates(): IP=10.204.32.1 hash(IP)=48902 0.757 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 0: selected fe:2c:91:68:29:2b addr=48977 dist=65460 1.178 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 1: selected fe:81:ab:c5:e3:03 addr=49181 dist=65256 1.809 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 2: selected 66:25:a7:48:37:fb addr=49328 dist=65109 1.828 batadv:batadv_dbg:batman_adv bat0 DHT_SEND for 10.204.32.1 Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-06-23batman-adv: Remove "default n" in KconfigSven Eckelmann1-4/+0
The "default n" is the default value for any bool or tristate Kconfig setting. It is therefore not necessary to add it to a config entry. Reported-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-06-23batman-adv: enable DAT by default at compile timeAntonio Quartulli1-1/+1
DAT (Distributed ARP Table) has been enabled by default in the out-of-tree batman-adv kernel module for several years already. It can now be enabled in the kernel too. Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-06-23batman-adv: Drop "experimental" from BATMAN_V KconfigSven Eckelmann1-1/+1
The Kconfig option BATMAN_ADV_BATMAN_V is now enabled by default when the BATMAN_ADV is enabled. A feature which is enabled by default for a module should not be considered experimental. Reported-by: Joe Perches <joe@perches.com> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-05-14batman-adv: enable B.A.T.M.A.N. V compilation by defaultMarek Lindner1-1/+1
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-04-22batman-adv: Disable CONFIG_BATMAN_ADV_DEBUGFS by defaultSven Eckelmann1-2/+2
All tools which were known to the batman-adv development team are supporting the batman-adv netlink interface since a while. Also debugfs is not supported for batman-adv interfaces in any non-default netns. Thus disabling CONFIG_BATMAN_ADV_DEBUGFS by default should not cause problems on most systems. It is still possible to enable it in case it is still required in a specific setup. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-02-26batman-adv: Update copyright years for 2018Sven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2017-12-15batman-adv: Add license header to KconfigSven Eckelmann1-0/+17
The last remaining file without license notice and/or SPDX license identifier under net/batman-adv/ is the Kconfig. It should have been licensed under the same conditions as the rest of batman-adv and the Makefile which uses the CONFIG_* variables from Kconfig. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-10-17batman-adv: Allow selecting BATMAN V if CFG80211 is not builtLinus Lüssing1-1/+1
With the new stub for cfg80211_get_station(), we can now build the BATMAN V protocol even with a kernel that was built without any wireless support. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-08-09batman-adv: Allow to disable debugfs supportSven Eckelmann1-2/+13
The files provided by batman-adv via debugfs are currently converted to netlink. Tools which are not yet converted to use the netlink interface may still rely on the old debugfs files. But systems which already upgraded their tools can save some space by disabling this feature. The default configuration of batman-adv on amd64 can reduce the size of the module by around 11% when this feature is disabled. $ size net/batman-adv/batman-adv.ko* text data bss dec hex filename 150507 10395 4160 165062 284c6 net/batman-adv/batman-adv.ko.y 137106 7099 2112 146317 23b8d net/batman-adv/batman-adv.ko.n Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-06-30batman-adv: Add multicast optimization support for bridged setupsLinus Lüssing1-1/+1
With this patch we are finally able to support multicast optimizations in bridged setups, too. So far, if a bridge was added on top of a soft-interface (e.g. bat0) the batman-adv multicast optimizations needed to be disabled to avoid packetloss. Current Linux bridge implementations and API can now provide us with the so far missing information about interested but "remote" multicast receivers behind bridge ports. The Linux bridge performs the detection of remote participants interested in multicast packets with its own and mature so called IGMP and MLD snooping code and stores that in its database. With the new API provided by the bridge batman-adv can now simply hook into this database. We then reliably announce the gathered multicast listeners to other nodes through the batman-adv translation table. Additionally, the Linux bridge provides us with the information about whether an IGMP/MLD querier exists. If there is none then we need to disable multicast optimizations as we cannot learn about multicast listeners on external, bridged-in host then. Tested-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-06-30batman-adv: Always flood IGMP/MLD reportsLinus Lüssing1-1/+1
With this patch IGMP or MLD reports are always flooded. This is necessary for the upcoming bridge integration to function without multicast packet loss. With the report handling so far bridges might miss interested multicast listeners, leading to wrongly excluding ports from multicast packet forwarding. Currently we are treating IGMP/MLD reports, the messages bridges use to learn about interested multicast listeners, just as any other multicast packet: We try to send them to nodes matching its multicast destination. Unfortunately, the destination address of reports of the older IGMPv2/MLDv1 protocol families do not strictly adhere to their own protocol: More precisely, the interested receiver, an IGMPv2 or MLDv1 querier, itself usually does not listen to the multicast destination address of any reports. Therefore with this patch we are simply excluding IGMP/MLD reports from the multicast forwarding code path and keep flooding them. By that any bridge receives them and can properly learn about listeners. To avoid compatibility issues with older nodes not yet implementing this report handling, we need to force them to flood reports: We do this by bumping the multicast TVLV version to 2, effectively disabling their multicast optimization. Tested-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-03-02batman-adv: clarify CFG80211 dependencyArnd Bergmann1-1/+1
The driver calls cfg80211_get_station, which may be part of a module, so we must not enable BATMAN_ADV_BATMAN_V if BATMAN_ADV=y and CFG80211=m: net/built-in.o: In function `batadv_v_elp_get_throughput': (text+0x5c62c): undefined reference to `cfg80211_get_station' This clarifies the dependency to cover all combinations. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: c833484e5f38 ("batman-adv: ELP - compute the metric based on the estimated throughput") Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-29batman-adv: ELP - compute the metric based on the estimated throughputAntonio Quartulli1-1/+1
In case of wireless interface retrieve the throughput by querying cfg80211. To perform this call a separate work must be scheduled because the function may sleep and this is not allowed within an RCU protected context (RCU in this case is used to iterate over all the neighbours). Use ethtool to retrieve information about an Ethernet link like HALF/FULL_DUPLEX and advertised bandwidth (e.g. 100/10Mbps). The metric is updated each time a new ELP packet is sent, this way it is possible to timely react to a metric variation which can imply (for example) a neighbour disconnection. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2016-02-29batman-adv: ELP - adding basic infrastructureLinus Luessing1-0/+14
The B.A.T.M.A.N. protocol originally only used a single message type (called OGM) to determine the link qualities to the direct neighbors and spreading these link quality information through the whole mesh. This procedure is summarized on the BATMAN concept page and explained in details in the RFC draft published in 2008. This approach was chosen for its simplicity during the protocol design phase and the implementation. However, it also bears some drawbacks: * Wireless interfaces usually come with some packet loss, therefore a higher broadcast rate is desirable to allow a fast reaction on flaky connections. Other interfaces of the same host might be connected to Ethernet LANs / VPNs / etc which rarely exhibit packet loss would benefit from a lower broadcast rate to reduce overhead. * It generally is more desirable to detect local link quality changes at a faster rate than propagating all these changes through the entire mesh (the far end of the mesh does not need to care about local link quality changes that much). Other optimizations strategies, like reducing overhead, might be possible if OGMs weren't used for all tasks in the mesh at the same time. As a result detecting local link qualities shall be handled by an independent message type, ELP, whereas the OGM message type remains responsible for flooding the mesh with these link quality information and determining the overall path transmit qualities. Developed by Linus during a 6 months trainee study period in Ascom (Switzerland) AG. Signed-off-by: Linus Luessing <linus.luessing@web.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
2016-02-03batman-adv: Switch to HTTPS version of linksSven Eckelmann1-1/+1
open-mesh.org and its subdomains can only be accessed via HTTPS. HTTP-only requests are currently redirected automatically to HTTPS but references in the source code should be only https. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
2015-01-07batman-adv: Kconfig, Add missing DEBUG_FS dependencyMarkus Pargmann1-0/+1
BATMAN_ADV_DEBUG is using debugfs files for the debugging log. So it depends on DEBUG_FS which is missing as dependency in the Kconfig file. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2014-03-22batman-adv: Multicast Listener Announcements via Translation TableLinus Lüssing1-0/+9
With this patch a node which has no bridge interface on top of its soft interface announces its local multicast listeners via the translation table. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2013-03-13batman-adv: network coding - add the initial infrastructure codeMartin Hundebøll1-0/+14
Network coding exploits the 802.11 shared medium to allow multiple packets to be sent in a single transmission. In brief, a relay can XOR two packets, and send the coded packet to two destinations. The receivers can decode one of the original packets by XOR'ing the coded packet with the other original packet. This will lead to increased throughput in topologies where two packets cross one relay. In a simple topology with three nodes, it takes four transmissions without network coding to get one packet from Node A to Node B and one from Node B to Node A: 1. Node A ---- p1 ---> Node R Node B 2. Node A Node R <--- p2 ---- Node B 3. Node A <--- p2 ---- Node R Node B 4. Node A Node R ---- p1 ---> Node B With network coding, the relay only needs one transmission, which saves us one slot of valuable airtime: 1. Node A ---- p1 ---> Node R Node B 2. Node A Node R <--- p2 ---- Node B 3. Node A <- p1 x p2 - Node R - p1 x p2 -> Node B The same principle holds for a topology including five nodes. Here the packets from Node A and Node B are overheard by Node C and Node D, respectively. This allows Node R to send a network coded packet to save one transmission: Node A Node B | \ / | | p1 p2 | | \ / | p1 > Node R < p2 | | | / \ | | p1 x p2 p1 x p2 | v / \ v / \ Node C < > Node D More information is available on the open-mesh.org wiki[1]. This patch adds the initial code to support network coding in batman-adv. It sets up a worker thread to do house keeping and adds a sysfs file to enable/disable network coding. The feature is disabled by default, as it requires a wifi-driver with working promiscuous mode, and also because it adds a small delay at each hop. [1] http://www.open-mesh.org/projects/batman-adv/wiki/Catwoman Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-21batman-adv: Add function to calculate crc32c for the skb payloadSven Eckelmann1-0/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: Distributed ARP Table - add compile optionAntonio Quartulli1-2/+12
This patch makes it possible to decide whether to include DAT within the batman-adv binary or not. It is extremely useful when the user wants to reduce the size of the resulting module by cutting off any not needed feature. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: Distributed ARP Table - add ARP parsing functionsAntonio Quartulli1-2/+2
ARP messages are now parsed to make it possible to trigger special actions depending on their types (snooping). Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-04-11batman-adv: add bridge loop avoidance compile optionSimon Wunderlich1-1/+11
The define CONFIG_BATMAN_ADV_BLA switches the bridge loop avoidance on - skip it, and the bridge loop avoidance is not compiled in. This is useful if binary size should be saved or the feature is not needed. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-04-11batman-adv: add basic bridge loop avoidance codeSimon Wunderlich1-1/+1
This second version of the bridge loop avoidance for batman-adv avoids loops between the mesh and a backbone (usually a LAN). By connecting multiple batman-adv mesh nodes to the same ethernet segment a loop can be created when the soft-interface is bridged into that ethernet segment. A simple visualization of the loop involving the most common case - a LAN as ethernet segment: node1 <-- LAN --> node2 | | wifi <-- mesh --> wifi Packets from the LAN (e.g. ARP broadcasts) will circle forever from node1 or node2 over the mesh back into the LAN. With this patch, batman recognizes backbone gateways, nodes which are part of the mesh and backbone/LAN at the same time. Each backbone gateway "claims" clients from within the mesh to handle them exclusively. By restricting that only responsible backbone gateways may handle their claimed clients traffic, loops are effectively avoided. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-04-11batman-adv: clean up KconfigAntonio Quartulli1-9/+8
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2011-06-20batman-adv: improved client announcement mechanismAntonio Quartulli1-0/+1
The client announcement mechanism informs every mesh node in the network of any connected non-mesh client, in order to find the path towards that client from any given point in the mesh. The old implementation was based on the simple idea of appending a data buffer to each OGM containing all the client MAC addresses the node is serving. All other nodes can populate their global translation tables (table which links client MAC addresses to node addresses) using this MAC address buffer and linking it to the node's address contained in the OGM. A node that wants to contact a client has to lookup the node the client is connected to and its address in the global translation table. It is easy to understand that this implementation suffers from several issues: - big overhead (each and every OGM contains the entire list of connected clients) - high latencies for client route updates due to long OGM trip time and OGM losses The new implementation addresses these issues by appending client changes (new client joined or a client left) to the OGM instead of filling it with all the client addresses each time. In this way nodes can modify their global tables by means of "updates", thus reducing the overhead within the OGMs. To keep the entire network in sync each node maintains a translation table version number (ttvn) and a translation table checksum. These values are spread with the OGM to allow all the network participants to determine whether or not they need to update their translation table information. When a translation table lookup is performed in order to send a packet to a client attached to another node, the destination's ttvn is added to the payload packet. Forwarding nodes can compare the packet's ttvn with their destination's ttvn (this node could have a fresher information than the source) and re-route the packet if necessary. This greatly reduces the packet loss of clients roaming from one AP to the next. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2010-12-16net: Add batman-adv meshing protocolSven Eckelmann1-0/+25
B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing protocol for multi-hop ad-hoc mesh networks. The networks may be wired or wireless. See http://www.open-mesh.org/ for more information and user space tools. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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