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linux/net/batman-adv/gateway_client.h

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batman-adv: Add SPDX license identifier above copyright header The "Linux kernel licensing rules" require that each file has a SPDX license identifier as first line (and sometimes as second line). The FSFE REUSE practices [1] would also require the same tags but have no restrictions on the placement in the source file. Using the "Linux kernel licensing rules" is therefore also fulfilling the FSFE REUSE practices requirements at the same time. [1] https://reuse.software/practices/ Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2017-11-19 14:05:11 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
batman-adv: Drop publication years from copyright info The batman-adv source code was using the year of publication (to net-next) as "last" year for the copyright statement. The whole source code mentioned in the MAINTAINERS "BATMAN ADVANCED" section was handled as a single entity regarding the publishing year. This avoided having outdated (in sense of year information - not copyright holder) publishing information inside several files. But since the simple "update copyright year" commit (without other changes) in the file was not well received in the upstream kernel, the option to not have a copyright year (for initial and last publication) in the files are chosen instead. More detailed information about the years can still be retrieved from the SCM system. Signed-off-by: Sven Eckelmann <sven@narfation.org> Acked-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2020-12-31 23:00:01 +00:00
/* Copyright (C) B.A.T.M.A.N. contributors:
net: Add batman-adv meshing protocol 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>
2010-12-13 11:19:28 +00:00
*
* Marek Lindner
*/
#ifndef _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
#define _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
batman-adv: Add required includes to all files The header files could not be build indepdent from each other. This is happened because headers didn't include the files for things they've used. This was problematic because the success of a build depended on the knowledge about the right order of local includes. Also source files were not including everything they've used explicitly. Instead they required that transitive includes are always stable. This is problematic because some transitive includes are not obvious, depend on config settings and may not be stable in the future. The order for include blocks are: * primary headers (main.h and the *.h file of a *.c file) * global linux headers * required local headers * extra forward declarations for pointers in function/struct declarations The only exceptions are linux/bitops.h and linux/if_ether.h in packet.h. This header file is shared with userspace applications like batctl and must therefore build together with userspace applications. The header linux/bitops.h is not part of the uapi headers and linux/if_ether.h conflicts with the musl implementation of netinet/if_ether.h. The maintainers rejected the use of __KERNEL__ preprocessor checks and thus these two headers are only in main.h. All files using packet.h first have to include main.h to work correctly. Reported-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2015-04-17 17:40:28 +00:00
#include "main.h"
batman-adv: Check ptr for NULL before reducing its refcnt The commit b37a46683739 ("netdevice: add the case if dev is NULL") changed the way how the NULL check for net_devices have to be handled when trying to reduce its reference counter. Before this commit, it was the responsibility of the caller to check whether the object is NULL or not. But it was changed to behave more like kfree. Now the callee has to handle the NULL-case. The batman-adv code was scanned via cocinelle for similar places. These were changed to use the paradigm @@ identifier E, T, R, C; identifier put; @@ void put(struct T *E) { + if (!E) + return; kref_put(&E->C, R); } Functions which were used in other sources files were moved to the header to allow the compiler to inline the NULL check and the kref_put call. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2021-08-08 17:56:17 +00:00
#include <linux/kref.h>
batman-adv: Use includes instead of fwdecls While it can be slightly beneficial for the build performance to use forward declarations instead of includes, the handling of them together with changes in the included headers makes it unnecessary complicated and fragile. Just replace them with actual includes since some parts (hwmon, ..) of the kernel even request avoidance of forward declarations and net/ is mostly not using them in *.c file. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-05-24 18:11:17 +00:00
#include <linux/netlink.h>
#include <linux/skbuff.h>
batman-adv: Add required includes to all files The header files could not be build indepdent from each other. This is happened because headers didn't include the files for things they've used. This was problematic because the success of a build depended on the knowledge about the right order of local includes. Also source files were not including everything they've used explicitly. Instead they required that transitive includes are always stable. This is problematic because some transitive includes are not obvious, depend on config settings and may not be stable in the future. The order for include blocks are: * primary headers (main.h and the *.h file of a *.c file) * global linux headers * required local headers * extra forward declarations for pointers in function/struct declarations The only exceptions are linux/bitops.h and linux/if_ether.h in packet.h. This header file is shared with userspace applications like batctl and must therefore build together with userspace applications. The header linux/bitops.h is not part of the uapi headers and linux/if_ether.h conflicts with the musl implementation of netinet/if_ether.h. The maintainers rejected the use of __KERNEL__ preprocessor checks and thus these two headers are only in main.h. All files using packet.h first have to include main.h to work correctly. Reported-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2015-04-17 17:40:28 +00:00
#include <linux/types.h>
batman-adv: Use includes instead of fwdecls While it can be slightly beneficial for the build performance to use forward declarations instead of includes, the handling of them together with changes in the included headers makes it unnecessary complicated and fragile. Just replace them with actual includes since some parts (hwmon, ..) of the kernel even request avoidance of forward declarations and net/ is mostly not using them in *.c file. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-05-24 18:11:17 +00:00
#include <uapi/linux/batadv_packet.h>
batman-adv: Add required includes to all files The header files could not be build indepdent from each other. This is happened because headers didn't include the files for things they've used. This was problematic because the success of a build depended on the knowledge about the right order of local includes. Also source files were not including everything they've used explicitly. Instead they required that transitive includes are always stable. This is problematic because some transitive includes are not obvious, depend on config settings and may not be stable in the future. The order for include blocks are: * primary headers (main.h and the *.h file of a *.c file) * global linux headers * required local headers * extra forward declarations for pointers in function/struct declarations The only exceptions are linux/bitops.h and linux/if_ether.h in packet.h. This header file is shared with userspace applications like batctl and must therefore build together with userspace applications. The header linux/bitops.h is not part of the uapi headers and linux/if_ether.h conflicts with the musl implementation of netinet/if_ether.h. The maintainers rejected the use of __KERNEL__ preprocessor checks and thus these two headers are only in main.h. All files using packet.h first have to include main.h to work correctly. Reported-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2015-04-17 17:40:28 +00:00
batman-adv: send GW_DEL event when the gw client mode is deselected Whenever the GW client mode is deselected, a DEL event has to be sent in order to tell userspace that the current gateway has been lost. Send the uevent on state change only if a gateway was currently selected. Reported-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-07-12 22:06:00 +00:00
void batadv_gw_check_client_stop(struct batadv_priv *bat_priv);
batman-adv: rename gw_deselect() to gw_reselect() The function batadv_gw_deselect() is actually not deselecting anything. It is just informing the GW code to perform a re-election procedure when possible. The current gateway is not being touched at all and therefore the name of this function is rather misleading. Rename it to batadv_gw_reselect() to batadv_gw_reselect() to make its behaviour easier to grasp. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2013-11-04 19:59:41 +00:00
void batadv_gw_reselect(struct batadv_priv *bat_priv);
batman-adv: Prefix types structs with batadv_ Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-05 20:31:31 +00:00
void batadv_gw_election(struct batadv_priv *bat_priv);
struct batadv_orig_node *
batadv_gw_get_selected_orig(struct batadv_priv *bat_priv);
void batadv_gw_check_election(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node);
void batadv_gw_node_update(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
batman-adv: tvlv - gateway download/upload bandwidth container Prior to this patch batman-adv read the advertised uplink bandwidth from userspace and compressed this information into a single byte called "gateway class". Now the download & upload bandwidth information is sent as-is. No userspace change is necessary since the sysfs API always allowed to specify a bandwidth. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Spyros Gasteratos <morfeas3000@gmail.com> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2013-04-23 13:39:58 +00:00
struct batadv_tvlv_gateway_data *gateway);
batman-adv: Prefix types structs with batadv_ Reported-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-05 20:31:31 +00:00
void batadv_gw_node_delete(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node);
batman-adv: remove obsolete deleted attribute for gateway node With rcu, the gateway node deleted attribute is not needed anymore. In fact, it may delay the free of the gateway node and its referenced structures. Therefore remove it altogether and simplify purging as well. Signed-off-by: Simon Wunderlich <simon@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-08-03 17:13:58 +00:00
void batadv_gw_node_free(struct batadv_priv *bat_priv);
batman-adv: Check ptr for NULL before reducing its refcnt The commit b37a46683739 ("netdevice: add the case if dev is NULL") changed the way how the NULL check for net_devices have to be handled when trying to reduce its reference counter. Before this commit, it was the responsibility of the caller to check whether the object is NULL or not. But it was changed to behave more like kfree. Now the callee has to handle the NULL-case. The batman-adv code was scanned via cocinelle for similar places. These were changed to use the paradigm @@ identifier E, T, R, C; identifier put; @@ void put(struct T *E) { + if (!E) + return; kref_put(&E->C, R); } Functions which were used in other sources files were moved to the header to allow the compiler to inline the NULL check and the kref_put call. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2021-08-08 17:56:17 +00:00
void batadv_gw_node_release(struct kref *ref);
batman-adv: make GW election code protocol specific Each routing protocol may have its own specific logic about gateway election which is potentially based on the metric being used. Create two GW specific API functions and move the current election logic in the B.A.T.M.A.N. IV specific code. Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-07-03 10:46:33 +00:00
struct batadv_gw_node *
batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv);
batman-adv: netlink: add gateway table queries Add BATADV_CMD_GET_GATEWAYS commands, using handlers bat_gw_dump in batadv_algo_ops. Will always return -EOPNOTSUPP for now, as no implementations exist yet. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-07-03 11:31:42 +00:00
int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb);
batman-adv: fix potential kernel paging errors for unicast transmissions There are several functions which might reallocate skb data. Currently some places keep reusing their old ethhdr pointer regardless of whether they became invalid after such a reallocation or not. This potentially leads to kernel paging errors. This patch fixes these by refetching the ethdr pointer after the potential reallocations. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-08-06 18:21:15 +00:00
bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb);
batman-adv: send every DHCP packet as bat-unicast In different situations it is possible that the DHCP server or client uses broadcast Ethernet frames to send messages to each other. The GW component in batman-adv takes care of using bat-unicast packets to bring broadcast DHCP Discover/Requests to the "best" server. On the way back the DHCP server usually sends unicasts, but upon client request it may decide to use broadcasts as well. This patch improves the GW component so that it now snoops and sends as unicast all the DHCP packets, no matter if they were generated by a DHCP server or client. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
2013-11-05 18:31:08 +00:00
enum batadv_dhcp_recipient
batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,
batman-adv: Replace C99 int types with kernel type (s|u)(8|16|32|64) are the preferred types in the kernel. The use of the standard C99 types u?int(8|16|32|64)_t are objected by some people and even checkpatch now warns about using them. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-05-26 16:34:26 +00:00
u8 *chaddr);
batman-adv: B.A.T.M.A.N. V - implement GW selection logic Since the GW selection logic has been made routing protocol specific it is now possible for B.A.T.M.A.N V to have its own mechanism by providing the API implementation. Implement the GW specific API in the B.A.T.M.A.N. V protocol in order to provide a working GW selection mechanism. Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-07-03 10:46:34 +00:00
struct batadv_gw_node *batadv_gw_node_get(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node);
net: Add batman-adv meshing protocol 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>
2010-12-13 11:19:28 +00:00
batman-adv: Check ptr for NULL before reducing its refcnt The commit b37a46683739 ("netdevice: add the case if dev is NULL") changed the way how the NULL check for net_devices have to be handled when trying to reduce its reference counter. Before this commit, it was the responsibility of the caller to check whether the object is NULL or not. But it was changed to behave more like kfree. Now the callee has to handle the NULL-case. The batman-adv code was scanned via cocinelle for similar places. These were changed to use the paradigm @@ identifier E, T, R, C; identifier put; @@ void put(struct T *E) { + if (!E) + return; kref_put(&E->C, R); } Functions which were used in other sources files were moved to the header to allow the compiler to inline the NULL check and the kref_put call. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2021-08-08 17:56:17 +00:00
/**
* batadv_gw_node_put() - decrement the gw_node refcounter and possibly release
* it
* @gw_node: gateway node to free
*/
static inline void batadv_gw_node_put(struct batadv_gw_node *gw_node)
{
if (!gw_node)
return;
kref_put(&gw_node->refcount, batadv_gw_node_release);
}
net: Add batman-adv meshing protocol 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>
2010-12-13 11:19:28 +00:00
#endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */
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