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2011-11-20batman-adv: update internal version numberSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-09-08batman-adv: update internal version numberSven Eckelmann
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 Quartulli
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 Quartulli
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 Eckelmann
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 Quartulli
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 Quartulli
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 Quartulli
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 Quartulli
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 Eckelmann
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 Lindner
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 Eckelmann
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 Eckelmann
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 Quartulli
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 Eckelmann
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 Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-08batman-adv: Remove multiline comments from line endingSven Eckelmann
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 Quartulli
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>
2011-05-01batman-adv: Move definition of atomic_dec_not_zero() into main.hAntonio Quartulli
atomic_dec_not_zero() is very useful and it is currently defined multiple times. So it is possible to move it in main.h Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-03-05batman-adv: rename global if_list to hardif_listMarek Lindner
Batman-adv works with "hard interfaces" as well as "soft interfaces". The new name should better make clear which kind of interfaces this list stores. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-03-05batman-adv: separate ethernet comparing calls from hash functionsMarek Lindner
Note: The function compare_ether_addr() provided by the Linux kernel requires aligned memory. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-01-31batman-adv: Update copyright yearsSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-31batman-adv: Remove unused definitionsSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-16batman-adv: Use "__attribute__" shortcut macrosSven Eckelmann
Linux 2.6.21 defines different macros for __attribute__ which are also used inside batman-adv. The next version of checkpatch.pl warns about the usage of __attribute__((packed))). Linux 2.6.33 defines an extra macro __always_unused which is used to assist source code analyzers and can be used to removed the last existing __attribute__ inside the source code. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2010-12-16net: Add batman-adv meshing protocolSven Eckelmann
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>