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path: root/net/batman-adv/routing.c
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2012-11-21batman-adv: Fix broadcast duplist for fragmentationSimon Wunderlich
If the skb is fragmented, the checksum must be computed on the individual fragments, just using skb->data may fail on fragmented data. Instead of doing linearizing the packet, use the new batadv_crc32 to do that more efficiently- it should not hurt replacing the old crc16 by the new crc32. Reported-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-21batman-adv: Add wrapper to look up neighbor and send skbMartin Hundebøll
By adding batadv_send_skb_to_orig() in send.c, we can remove duplicate code that looks up the next hop and then calls batadv_send_skb_packet(). Furthermore, this prepares the upcoming new implementation of fragmentation, which requires the next hop to route packets. Please note that this doesn't entirely remove the next-hop lookup in routing.c and unicast.c, since it is used by the current fragmentation code. Also note that the next-hop info is removed from debug messages in translation-table.c, since it is looked up elsewhere. 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>
2012-11-14batman-adv: substitute tt_poss_change with a per-tt_entry flagAntonio Quartulli
tt_poss_change is a node-wide flag which tells whether the node is in a roaming state (a client recently moved to/away from it) in order to let it apply special re-routing rules. However this flag does not give a clear idea of the current state because it is not possible to understand *which client* is actually involved in the roaming. For this reason a better approach has been chosen: instead of using a node-wide variable, the roaming state is now given by a per-tt_entry ROAM flag which, in case of packet coming through the node, tells the node whether the real destination is in roaming state or not. With this flag change, batadv_check_unicast_ttvn() has also been rearranged in order to better fit the new re-routing logic and to be much more readable. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: enable fast client detection using unicast_4addr packetsAntonio Quartulli
The "early client detection mechanism" can be extended to find new clients by means of unicast_4addr packets. The unicast_4addr packet contains as well as the broadcast packet (which is currently used in this mechanism) the address of the originating node and can therefore be used to install new entries in the Global Translation Table Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-11-07batman-adv: Add get_ethtool_stats() support for DATMartin Hundebøll
Added additional counters for D.A.T. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: Distributed ARP Table - add snooping functions for ARP messagesAntonio Quartulli
In case of an ARP message going in or out the soft_iface, it is intercepted and a special action is performed. In particular the DHT helper functions previously implemented are used to store all the ARP entries belonging to the network in order to provide a fast and unicast lookup instead of the classic broadcast flooding mechanism. Each node stores the entries it is responsible for (following the DHT rules) in its soft_iface ARP table. This makes it possible to reuse the kernel data structures and functions for ARP management. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: add UNICAST_4ADDR packet typeAntonio Quartulli
The current unicast packet type does not contain the orig source address. This patches add a new unicast packet (called UNICAST_4ADDR) which provides two new fields: the originator source address and the subtype (the type of the data contained in the packet payload). The former is useful to identify the node which injected the packet into the network and the latter is useful to avoid creating new unicast packet types in the future: a macro defining a new subtype will be enough. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: check for more space before accessing the skbAntonio Quartulli
In batadv_check_unicast_ttvn() the code accesses both the unicast header and the Ethernet header in the payload. For this reason pskb_may_pull() must be invoked to check for the required space. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: print packets re-routing on DBG_TT and ratelimit itAntonio Quartulli
To simplify TranslationTable debugging it is better to print the packet rerouting message on the DBG_TT log level. In this way a developer interested in packets rerouting doesn't need to filter it out of the whole ROUTES log. Moreover, since this message will appear for each rerouted message, it is now "ratelimited". Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: Only increase refcounter once for alternate routerSven Eckelmann
The test whether we can use a router for alternating bonding should only be done once because it is already known that it is still usable and will not be deleted from the list soon. This patch addresses Coverity #712285: Unchecked return value Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: use check_unicast_packet() in recv_roam_adv()Antonio Quartulli
To avoid code duplication and to simplify further changes, check_unicast_packet() is now used in recv_roam_adv() to check for not well formed packets and so discard them. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-18batman-adv: Fix broadcast packet CRC calculationLinus Lüssing
So far the crc16 checksum for a batman-adv broadcast data packet, received on a batman-adv hard interface, was calculated over zero bytes of its content leading to many incoming broadcast data packets wrongly being dropped (60-80% packet loss). This patch fixes this issue by calculating the crc16 over the actual, complete broadcast payload. The issue is a regression introduced by ("batman-adv: add broadcast duplicate check"). Signed-off-by: Linus Lüssing <linus.luessing@web.de> Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-08-23batman-adv: change interface_rx to get orig nodeAntonio Quartulli
In order to understand where a broadcast packet is coming from and use this information to detect not yet announced clients, this patch modifies the interface_rx() function by passing a new argument: the orig node corresponding to the node that originated the received packet (if known). This new argument if not NULL for broadcast packets only (other packets does not have source field). Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Reduce accumulated length of simple statementsSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Drop tt queries with foreign destMartin Hundebøll
When enabling promiscuous mode, tt queries for other hosts might be received. Before this patch, "foreign" tt queries were processed like any other query and thus forwarded to its destination again and thereby causing a loop. This patch adds a check to drop foreign tt queries. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Move batadv_check_unicast_packet()Martin Hundebøll
batadv_check_unicast_packet() is needed in batadv_recv_tt_query(), so move the former to before the latter. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-08-23batman-adv: Split batadv_priv in sub-structures for featuresSven Eckelmann
The structure batadv_priv grows everytime a new feature is introduced. It gets hard to find the parts of the struct that belongs to a specific feature. This becomes even harder by the fact that not every feature uses a prefix in the member name. The variables for bridge loop avoidence, gateway handling, translation table and visualization server are moved into separate structs that are included in the bat_priv main struct. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-07-01batman-adv: Fix alignment after opened parenthesesSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-07-01batman-adv: Prefix types structs with batadv_Sven Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix packet structs with batadv_Sven Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix hash struct and typedef with batadv_Sven Eckelmann
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 Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix packet enum with BATADV_Sven Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix types enum with BATADV_Sven Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-07-01batman-adv: Prefix hard-interface enum with BATADV_Sven Eckelmann
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 Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-28batman-adv: Prefix packet defines with BATADV_Sven Eckelmann
Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-28batman-adv: beautify tt_global_add() argument listAntonio Quartulli
Instead of adding a new bool argument each time it is needed, it is better (and simpler) to pass an 8bit flag argument which contains all the needed flags Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-28batman-adv: Prefix remaining function like macros with batadv_Sven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-25batman-adv: Prefix routing local static functions with batadv_Sven Eckelmann
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>
2012-06-25batman-adv: Prefix main static inline functions with batadv_Sven Eckelmann
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>
2012-06-24batman-adv: Prefix unicast static inline functions with batadv_Sven Eckelmann
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>
2012-06-24batman-adv: Prefix originator static inline functions with batadv_Sven Eckelmann
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>
2012-06-24batman-adv: Prefix hard-interface static inline functions with batadv_Sven Eckelmann
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>
2012-06-24batman-adv: Prefix bitarray static inline functions with batadv_Sven Eckelmann
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 Eckelmann
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 Eckelmann
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 vis non-static functions with batadv_Sven Eckelmann
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 unicast non-static functions with batadv_Sven Eckelmann
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 translation-table non-static functions with batadv_Sven Eckelmann
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 soft-interface non-static functions with batadv_Sven Eckelmann
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 send non-static functions with batadv_Sven Eckelmann
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 routing non-static functions with batadv_Sven Eckelmann
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 originator non-static functions with batadv_Sven Eckelmann
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 icmp-socket non-static functions with batadv_Sven Eckelmann
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 bridge_loop_avoidance non-static functions with batadv_Sven Eckelmann
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 bitarray non-static functions with batadv_Sven Eckelmann
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: don't bother flipping ->tt_dataAl Viro
just keep it net-endian all along Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [lindner_marek@yahoo.de: fix checkpatch warnings] Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-18batman-adv: Add get_ethtool_stats() supportMartin Hundebøll
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: fix skb->data assignmentAntonio Quartulli
skb_linearize(skb) possibly rearranges the skb internal data and then changes the skb->data pointer value. For this reason any other pointer in the code that was assigned skb->data before invoking skb_linearise(skb) must be re-assigned. In the current tt_query message handling code this is not done and therefore, in case of skb linearization, the pointer used to handle the packet header ends up in pointing to poisoned memory. The packet is then dropped but the translation-table mechanism is corrupted. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Cc: <stable@vger.kernel.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>