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2012-11-07batman-adv: Distributed ARP Table - add a new debug log levelAntonio Quartulli1-1/+3
A new log level has been added to concentrate messages regarding DAT: ARP snooping, requests, response and DHT related messages. The new log level is named BATADV_DBG_DAT Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: add kernel-doc for enum batadv_dbg_levelAntonio Quartulli1-4/+11
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: Check return value of try_module_getSven Eckelmann1-2/+0
New operations should not be started when they need an increased module reference counter and try_module_get failed. This patch addresses Coverity #712284: Unchecked return value Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: consolidate duplicated primary_if checking codeMarek Lindner1-0/+2
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Start new development cycleSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: detect not yet announced clientsAntonio Quartulli1-0/+1
With the current TT mechanism a new client joining the network is not immediately able to communicate with other hosts because its MAC address has not been announced yet. This situation holds until the first OGM containing its joining event will be spread over the mesh network. This behaviour can be acceptable in networks where the originator interval is a small value (e.g. 1sec) but if that value is set to an higher time (e.g. 5secs) the client could suffer from several malfunctions like DHCP client timeouts, etc. This patch adds an early detection mechanism that makes nodes in the network able to recognise "not yet announced clients" by means of the broadcast packets they emitted on connection (e.g. ARP or DHCP request). The added client will then be confirmed upon receiving the OGM claiming it or purged if such OGM is not received within a fixed amount of time. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Use BIT(x) macro to calculate bit positionsSven Eckelmann1-9/+9
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: fix typos in commentsAntonio Quartulli1-4/+4
the word millisecond is misspelled in several comments. This patch fixes it. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-07-10net: Fix (nearly-)kernel-doc comments for various functionsBen Hutchings1-1/+2
Fix incorrect start markers, wrapped summary lines, missing section breaks, incorrect separators, and some name mismatches. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-01batman-adv: fix counter summary lengthMarek Lindner1-2/+1
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Acked-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-07-01batman-adv: Prefix types structs with batadv_Sven Eckelmann1-11/+13
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix main enum with BATADV_Sven Eckelmann1-18/+18
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-28batman-adv: Prefix main defines with BATADV_Sven Eckelmann1-40/+41
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-28batman-adv: Prefix remaining function like macros with batadv_Sven Eckelmann1-10/+10
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-25batman-adv: Prefix main static inline functions with batadv_Sven Eckelmann1-8/+9
All non-static symbols of batman-adv were prefixed with batadv_ to avoid collisions with other symbols of the kernel. Other symbols of batman-adv should use the same prefix to keep the naming scheme consistent. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-20batman-adv: Reformat multiline comments to consistent styleSven Eckelmann1-18/+20
batman-adv doesn't follow the style for multiline comments that David S. Miller prefers. All comments should be reformatted to follow this consistent style to make the code slightly more readable. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-20batman-adv: Prefix main non-static functions with batadv_Sven Eckelmann1-20/+21
batman-adv can be compiled as part of the kernel instead of an module. In that case the linker will see all non-static symbols of batman-adv and all other non-static symbols of the kernel. This could lead to symbol collisions. A prefix for the batman-adv symbols that defines their private namespace avoids such a problem. Reported-by: David Miller <davem@davemloft.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-20batman-adv: Prefix bat_debugfs non-static functions with batadv_Sven Eckelmann1-2/+3
batman-adv can be compiled as part of the kernel instead of an module. In that case the linker will see all non-static symbols of batman-adv and all other non-static symbols of the kernel. This could lead to symbol collisions. A prefix for the batman-adv symbols that defines their private namespace avoids such a problem. Reported-by: David Miller <davem@davemloft.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-18batman-adv: Add get_ethtool_stats() supportMartin Hundebøll1-0/+27
Added additional counters in a bat_stats structure, which are exported through the ethtool api. The counters are specific to batman-adv and includes: forwarded packets and bytes management packets and bytes (aggregated OGMs at this point) translation table packets New counters are added by extending "enum bat_counters" in types.h and adding corresponding descriptive string(s) to bat_counters_strings in soft-iface.c. Counters are increased by calling batadv_add_counter() and incremented by one by calling batadv_inc_counter(). Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-18batman-adv: update internal version numberSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-05-13batman-adv: Start new development cycleSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-05-11batman-adv: introduce packet type handler array for incoming packetsMarek Lindner1-0/+6
The packet handler array replaces the growing switch statement, thus dealing with incoming packets in a more efficient way. It also adds to possibility to register packet handlers on the fly. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-04-11batman-adv: add broadcast duplicate checkSimon Wunderlich1-0/+3
When multiple backbone gateways relay the same broadcast from the backbone into the mesh, other nodes in the mesh may receive this broadcast multiple times. To avoid this, the crc checksums of received broadcasts are recorded and new broadcast packets with the same content may be dropped if received by another gateway. 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/+5
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: remove old bridge loop avoidance codeSimon Wunderlich1-2/+0
The functionality is to be replaced by an improved implementation, so first clean up. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-04-11batman-adv: Replace bitarray operations with bitmapSven Eckelmann1-1/+1
bitarray.c consists mostly of functionality that is already available as part of the standard kernel API. batman-adv could use architecture optimized code and reduce the binary size by switching to the standard functions. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-03-11batman-adv: Don't begin block comments with only a /* lineSven Eckelmann1-11/+2
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-02-17batman-adv: Start new development cycleSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-02-17batman-adv: Update copyright yearsSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-02-17batman-adv: convert time_after instances to has_timed_outMarek Lindner1-6/+7
To increase readability the has_timed_out() functions has been introduced. This patch converts existing time_after() calls to use this wrapper function (if applicable). This patch also converts all timeouts to miliseconds to be consistent. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
2012-02-17batman-adv: add infrastructure to change routing algorithm at runtimeMarek Lindner1-0/+4
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-02-17batman-adv: Move is_out_of_time() to main.h for general useMartin Hundebøll1-0/+11
Both translation tables and network coding use timeouts to do house keeping, so we might as well share the function used to compare a timestamp+timeout with current time. For readability and simplicity, the function is renamed to has_timed_out() and uses time_is_before_jiffies() instead of time_after(). Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-11-20batman-adv: update internal version numberSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-09-08batman-adv: update internal version numberSven Eckelmann1-1/+1
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-08-22batman-adv: detect clients connected through a 802.11 deviceAntonio Quartulli1-0/+2
Clients connected through a 802.11 device are now marked with the TT_CLIENT_WIFI flag. This flag is also advertised with the tt announcement. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-08-22batman-adv: correct several typ0s in the commentsAntonio Quartulli1-2/+2
Several typos have been corrected and some sentences have been rephrased Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-07-05batman-adv: Replace version info instead of appending themSven Eckelmann1-8/+3
The version number of modules build outside of the tree can get revision numbers added. This is useful to give hints about the revision of a distribution package and the used patchset. The prepended source number or branch name doesn't add any additional information which would help to identify problems and can therefore be omitted. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-06-20batman-adv: improved gateway tq-based selectionAntonio Quartulli1-1/+2
If a client issues a DHCPREQUEST for renewal, the packet is dropped if the old destination (the old gateway for the client) TQ is smaller than the current best gateway TQ less GW_THRESHOLD 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>
2011-06-20batman-adv: add wrapper function to throw uevent in userspaceAntonio Quartulli1-0/+11
Using throw_uevent() is now possible to trigger uevent signal that can be recognised in userspace. Uevents will be triggered through the /devices/virtual/net/{MESH_IFACE} kobject. A triggered uevent has three properties: - type: the event class. Who generates the event (only 'gw' is currently defined). Corresponds to the BATTYPE uevent variable. - action: the associated action with the event ('add'/'change'/'del' are currently defined). Corresponds to the BATACTION uevent variable. - data: any useful data for the userspace. Corresponds to the BATDATA uevent variable. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-06-20batman-adv: improved roaming mechanismAntonio Quartulli1-1/+5
With the current client announcement implementation, in case of roaming, an update is triggered on the new AP serving the client. At that point the new information is spread around by means of the OGM broadcasting mechanism. Until this operations is not executed, no node is able to correctly route traffic towards the client. This obviously causes packet drops and introduces a delay in the time needed by the client to recover its connections. A new packet type called ROAMING_ADVERTISEMENT is added to account this issue. This message is sent in case of roaming from the new AP serving the client to the old one and will contain the client MAC address. In this way an out-of-OGM update is immediately committed, so that the old node can update its global translation table. Traffic reaching this node will then be redirected to the correct destination utilising the fresher information. Thus reducing the packet drops and the connection recovery delay. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-06-20batman-adv: improved client announcement mechanismAntonio Quartulli1-1/+6
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>
2011-06-20batman-adv: Reduce usage of charSven Eckelmann1-1/+1
char was used in different places to store information without really using the characteristics of that data type or by ignoring the fact that char has not a well defined signedness. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-06-09batman-adv: use NO_FLAGS define instead of hard-coding 0Marek Lindner1-0/+2
The definition NO_FLAGS was introduced to make the code more readable and shall be used to initialize flag fields. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-06-09batman-adv: Use enums for related constantsSven Eckelmann1-7/+10
CodingStyle "Chapter 12: Macros, Enums and RTL" recommends to use enums for several related constants. Internal states can be used without defining the actual value, but all values which are visible to the outside must be defined as before. Normal values are assigned as usual and flags are defined by shifts of a bit. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-30batman-adv: Check type of x and y in seq_(before|after)Sven Eckelmann1-2/+5
seq_before and seq_after depend on the fact that both sequence numbers have the same type and thus the same bitwidth. We can ensure that by compile time checking using a compare between the pointer to the temporary buffers which were created using the typeof of both parameters. For example gcc would create a warning like "warning: comparison of distinct pointer types lacks a cast". Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-30batman-adv: move smallest_signed_int(), seq_before() and seq_after() into main.hAntonio Quartulli1-0/+16
smallest_signed_int(), seq_before() and seq_after() are very useful functions that help to handle comparisons between sequence numbers. However they were only defined in vis.c. With this patch every batman-adv function will be able to use them. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-30batman-adv: Add const type qualifier for pointersSven Eckelmann1-4/+6
batman-adv uses pointers which are marked as const and should not violate that type qualifier by passing it to functions which force a cast to the non-const version. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-30batman-adv: Annotate functions with format stringsSven Eckelmann1-1/+2
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-08batman-adv: Remove multiline comments from line endingSven Eckelmann1-19/+21
It is slightly irritating that comments after a long line span over multiple lines without any code. It is easier to put them before the actual code and reduce the number of lines which the eye has to read. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-08batman-adv: rename everything from *hna* into *tt* (translation table)Antonio Quartulli1-2/+2
To be coherent, all the functions/variables/constants have been renamed to the TranslationTable style Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
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