Repository : ssh://git@open-mesh.org/batman-adv

On branch : master

commit 65326e3965dc5ff1863e26b3387510497d18ee8b Author: Markus Pargmann mpa@pengutronix.de Date: Sun May 15 11:07:43 2016 +0200

batman-adv: split tvlv into a separate file

The tvlv functionality in main.c is mostly unrelated to the rest of the content. It still takes up a large portion of this source file (~45%, 588 lines). Moving it to a separate file makes it better visible as a main component of the batman-adv implementation and hides it less in the other helper functions in main.c

Signed-off-by: Markus Pargmann mpa@pengutronix.de [sven@narfation.org: fix conflicts with current version, fix includes, rewrote commit message] Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Marek Lindner mareklindner@neomailbox.ch

65326e3965dc5ff1863e26b3387510497d18ee8b net/batman-adv/Makefile | 1 + net/batman-adv/bat_iv_ogm.c | 1 + net/batman-adv/bat_v_ogm.c | 1 + net/batman-adv/distributed-arp-table.c | 1 + net/batman-adv/gateway_common.c | 1 + net/batman-adv/main.c | 591 --------------------------- net/batman-adv/main.h | 34 -- net/batman-adv/multicast.c | 1 + net/batman-adv/network-coding.c | 1 + net/batman-adv/routing.c | 1 + net/batman-adv/translation-table.c | 1 + net/batman-adv/{main.c => tvlv.c} | 704 +-------------------------------- net/batman-adv/tvlv.h | 61 +++ 13 files changed, 74 insertions(+), 1325 deletions(-)

diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile index 4e5adba..a688fc0 100644 --- a/net/batman-adv/Makefile +++ b/net/batman-adv/Makefile @@ -41,3 +41,4 @@ batman-adv-y += send.o batman-adv-y += soft-interface.o batman-adv-y += sysfs.o batman-adv-y += translation-table.o +batman-adv-y += tvlv.o diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 6dc89b0..948a5b4 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -58,6 +58,7 @@ #include "routing.h" #include "send.h" #include "translation-table.h" +#include "tvlv.h"

static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work);

diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c index 23ea9bf..ca5a679 100644 --- a/net/batman-adv/bat_v_ogm.c +++ b/net/batman-adv/bat_v_ogm.c @@ -46,6 +46,7 @@ #include "routing.h" #include "send.h" #include "translation-table.h" +#include "tvlv.h"

/** * batadv_v_ogm_orig_get - retrieve and possibly create an originator node diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 278800a..584b827 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -48,6 +48,7 @@ #include "originator.h" #include "send.h" #include "translation-table.h" +#include "tvlv.h"

static void batadv_dat_purge(struct work_struct *work);

diff --git a/net/batman-adv/gateway_common.c b/net/batman-adv/gateway_common.c index 7754435..6a6f2d4 100644 --- a/net/batman-adv/gateway_common.c +++ b/net/batman-adv/gateway_common.c @@ -29,6 +29,7 @@

#include "gateway_client.h" #include "packet.h" +#include "tvlv.h"

/** * batadv_parse_throughput - parse supplied string buffer to extract throughput diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index e78b318..994ab82 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -31,16 +31,13 @@ #include <linux/kernel.h> #include <linux/kref.h> #include <linux/list.h> -#include <linux/lockdep.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/netdevice.h> -#include <linux/pkt_sched.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> #include <linux/skbuff.h> -#include <linux/slab.h> #include <linux/spinlock.h> #include <linux/stddef.h> #include <linux/string.h> @@ -645,594 +642,6 @@ __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr) }

/** - * batadv_tvlv_handler_release - release tvlv handler from lists and queue for - * free after rcu grace period - * @ref: kref pointer of the tvlv - */ -static void batadv_tvlv_handler_release(struct kref *ref) -{ - struct batadv_tvlv_handler *tvlv_handler; - - tvlv_handler = container_of(ref, struct batadv_tvlv_handler, refcount); - kfree_rcu(tvlv_handler, rcu); -} - -/** - * batadv_tvlv_handler_put - decrement the tvlv container refcounter and - * possibly release it - * @tvlv_handler: the tvlv handler to free - */ -static void batadv_tvlv_handler_put(struct batadv_tvlv_handler *tvlv_handler) -{ - kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release); -} - -/** - * batadv_tvlv_handler_get - retrieve tvlv handler from the tvlv handler list - * based on the provided type and version (both need to match) - * @bat_priv: the bat priv with all the soft interface information - * @type: tvlv handler type to look for - * @version: tvlv handler version to look for - * - * Return: tvlv handler if found or NULL otherwise. - */ -static struct batadv_tvlv_handler * -batadv_tvlv_handler_get(struct batadv_priv *bat_priv, u8 type, u8 version) -{ - struct batadv_tvlv_handler *tvlv_handler_tmp, *tvlv_handler = NULL; - - rcu_read_lock(); - hlist_for_each_entry_rcu(tvlv_handler_tmp, - &bat_priv->tvlv.handler_list, list) { - if (tvlv_handler_tmp->type != type) - continue; - - if (tvlv_handler_tmp->version != version) - continue; - - if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount)) - continue; - - tvlv_handler = tvlv_handler_tmp; - break; - } - rcu_read_unlock(); - - return tvlv_handler; -} - -/** - * batadv_tvlv_container_release - release tvlv from lists and free - * @ref: kref pointer of the tvlv - */ -static void batadv_tvlv_container_release(struct kref *ref) -{ - struct batadv_tvlv_container *tvlv; - - tvlv = container_of(ref, struct batadv_tvlv_container, refcount); - kfree(tvlv); -} - -/** - * batadv_tvlv_container_put - decrement the tvlv container refcounter and - * possibly release it - * @tvlv: the tvlv container to free - */ -static void batadv_tvlv_container_put(struct batadv_tvlv_container *tvlv) -{ - kref_put(&tvlv->refcount, batadv_tvlv_container_release); -} - -/** - * batadv_tvlv_container_get - retrieve tvlv container from the tvlv container - * list based on the provided type and version (both need to match) - * @bat_priv: the bat priv with all the soft interface information - * @type: tvlv container type to look for - * @version: tvlv container version to look for - * - * Has to be called with the appropriate locks being acquired - * (tvlv.container_list_lock). - * - * Return: tvlv container if found or NULL otherwise. - */ -static struct batadv_tvlv_container * -batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version) -{ - struct batadv_tvlv_container *tvlv_tmp, *tvlv = NULL; - - lockdep_assert_held(&bat_priv->tvlv.container_list_lock); - - hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) { - if (tvlv_tmp->tvlv_hdr.type != type) - continue; - - if (tvlv_tmp->tvlv_hdr.version != version) - continue; - - kref_get(&tvlv_tmp->refcount); - tvlv = tvlv_tmp; - break; - } - - return tvlv; -} - -/** - * batadv_tvlv_container_list_size - calculate the size of the tvlv container - * list entries - * @bat_priv: the bat priv with all the soft interface information - * - * Has to be called with the appropriate locks being acquired - * (tvlv.container_list_lock). - * - * Return: size of all currently registered tvlv containers in bytes. - */ -static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv) -{ - struct batadv_tvlv_container *tvlv; - u16 tvlv_len = 0; - - lockdep_assert_held(&bat_priv->tvlv.container_list_lock); - - hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) { - tvlv_len += sizeof(struct batadv_tvlv_hdr); - tvlv_len += ntohs(tvlv->tvlv_hdr.len); - } - - return tvlv_len; -} - -/** - * batadv_tvlv_container_remove - remove tvlv container from the tvlv container - * list - * @bat_priv: the bat priv with all the soft interface information - * @tvlv: the to be removed tvlv container - * - * Has to be called with the appropriate locks being acquired - * (tvlv.container_list_lock). - */ -static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv, - struct batadv_tvlv_container *tvlv) -{ - lockdep_assert_held(&bat_priv->tvlv.container_list_lock); - - if (!tvlv) - return; - - hlist_del(&tvlv->list); - - /* first call to decrement the counter, second call to free */ - batadv_tvlv_container_put(tvlv); - batadv_tvlv_container_put(tvlv); -} - -/** - * batadv_tvlv_container_unregister - unregister tvlv container based on the - * provided type and version (both need to match) - * @bat_priv: the bat priv with all the soft interface information - * @type: tvlv container type to unregister - * @version: tvlv container type to unregister - */ -void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, - u8 type, u8 version) -{ - struct batadv_tvlv_container *tvlv; - - spin_lock_bh(&bat_priv->tvlv.container_list_lock); - tvlv = batadv_tvlv_container_get(bat_priv, type, version); - batadv_tvlv_container_remove(bat_priv, tvlv); - spin_unlock_bh(&bat_priv->tvlv.container_list_lock); -} - -/** - * batadv_tvlv_container_register - register tvlv type, version and content - * to be propagated with each (primary interface) OGM - * @bat_priv: the bat priv with all the soft interface information - * @type: tvlv container type - * @version: tvlv container version - * @tvlv_value: tvlv container content - * @tvlv_value_len: tvlv container content length - * - * If a container of the same type and version was already registered the new - * content is going to replace the old one. - */ -void batadv_tvlv_container_register(struct batadv_priv *bat_priv, - u8 type, u8 version, - void *tvlv_value, u16 tvlv_value_len) -{ - struct batadv_tvlv_container *tvlv_old, *tvlv_new; - - if (!tvlv_value) - tvlv_value_len = 0; - - tvlv_new = kzalloc(sizeof(*tvlv_new) + tvlv_value_len, GFP_ATOMIC); - if (!tvlv_new) - return; - - tvlv_new->tvlv_hdr.version = version; - tvlv_new->tvlv_hdr.type = type; - tvlv_new->tvlv_hdr.len = htons(tvlv_value_len); - - memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len)); - INIT_HLIST_NODE(&tvlv_new->list); - kref_init(&tvlv_new->refcount); - - spin_lock_bh(&bat_priv->tvlv.container_list_lock); - tvlv_old = batadv_tvlv_container_get(bat_priv, type, version); - batadv_tvlv_container_remove(bat_priv, tvlv_old); - hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list); - spin_unlock_bh(&bat_priv->tvlv.container_list_lock); -} - -/** - * batadv_tvlv_realloc_packet_buff - reallocate packet buffer to accommodate - * requested packet size - * @packet_buff: packet buffer - * @packet_buff_len: packet buffer size - * @min_packet_len: requested packet minimum size - * @additional_packet_len: requested additional packet size on top of minimum - * size - * - * Return: true of the packet buffer could be changed to the requested size, - * false otherwise. - */ -static bool batadv_tvlv_realloc_packet_buff(unsigned char **packet_buff, - int *packet_buff_len, - int min_packet_len, - int additional_packet_len) -{ - unsigned char *new_buff; - - new_buff = kmalloc(min_packet_len + additional_packet_len, GFP_ATOMIC); - - /* keep old buffer if kmalloc should fail */ - if (!new_buff) - return false; - - memcpy(new_buff, *packet_buff, min_packet_len); - kfree(*packet_buff); - *packet_buff = new_buff; - *packet_buff_len = min_packet_len + additional_packet_len; - - return true; -} - -/** - * batadv_tvlv_container_ogm_append - append tvlv container content to given - * OGM packet buffer - * @bat_priv: the bat priv with all the soft interface information - * @packet_buff: ogm packet buffer - * @packet_buff_len: ogm packet buffer size including ogm header and tvlv - * content - * @packet_min_len: ogm header size to be preserved for the OGM itself - * - * The ogm packet might be enlarged or shrunk depending on the current size - * and the size of the to-be-appended tvlv containers. - * - * Return: size of all appended tvlv containers in bytes. - */ -u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv, - unsigned char **packet_buff, - int *packet_buff_len, int packet_min_len) -{ - struct batadv_tvlv_container *tvlv; - struct batadv_tvlv_hdr *tvlv_hdr; - u16 tvlv_value_len; - void *tvlv_value; - bool ret; - - spin_lock_bh(&bat_priv->tvlv.container_list_lock); - tvlv_value_len = batadv_tvlv_container_list_size(bat_priv); - - ret = batadv_tvlv_realloc_packet_buff(packet_buff, packet_buff_len, - packet_min_len, tvlv_value_len); - - if (!ret) - goto end; - - if (!tvlv_value_len) - goto end; - - tvlv_value = (*packet_buff) + packet_min_len; - - hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) { - tvlv_hdr = tvlv_value; - tvlv_hdr->type = tvlv->tvlv_hdr.type; - tvlv_hdr->version = tvlv->tvlv_hdr.version; - tvlv_hdr->len = tvlv->tvlv_hdr.len; - tvlv_value = tvlv_hdr + 1; - memcpy(tvlv_value, tvlv + 1, ntohs(tvlv->tvlv_hdr.len)); - tvlv_value = (u8 *)tvlv_value + ntohs(tvlv->tvlv_hdr.len); - } - -end: - spin_unlock_bh(&bat_priv->tvlv.container_list_lock); - return tvlv_value_len; -} - -/** - * batadv_tvlv_call_handler - parse the given tvlv buffer to call the - * appropriate handlers - * @bat_priv: the bat priv with all the soft interface information - * @tvlv_handler: tvlv callback function handling the tvlv content - * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet - * @orig_node: orig node emitting the ogm packet - * @src: source mac address of the unicast packet - * @dst: destination mac address of the unicast packet - * @tvlv_value: tvlv content - * @tvlv_value_len: tvlv content length - * - * Return: success if handler was not found or the return value of the handler - * callback. - */ -static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv, - struct batadv_tvlv_handler *tvlv_handler, - bool ogm_source, - struct batadv_orig_node *orig_node, - u8 *src, u8 *dst, - void *tvlv_value, u16 tvlv_value_len) -{ - if (!tvlv_handler) - return NET_RX_SUCCESS; - - if (ogm_source) { - if (!tvlv_handler->ogm_handler) - return NET_RX_SUCCESS; - - if (!orig_node) - return NET_RX_SUCCESS; - - tvlv_handler->ogm_handler(bat_priv, orig_node, - BATADV_NO_FLAGS, - tvlv_value, tvlv_value_len); - tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED; - } else { - if (!src) - return NET_RX_SUCCESS; - - if (!dst) - return NET_RX_SUCCESS; - - if (!tvlv_handler->unicast_handler) - return NET_RX_SUCCESS; - - return tvlv_handler->unicast_handler(bat_priv, src, - dst, tvlv_value, - tvlv_value_len); - } - - return NET_RX_SUCCESS; -} - -/** - * batadv_tvlv_containers_process - parse the given tvlv buffer to call the - * appropriate handlers - * @bat_priv: the bat priv with all the soft interface information - * @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet - * @orig_node: orig node emitting the ogm packet - * @src: source mac address of the unicast packet - * @dst: destination mac address of the unicast packet - * @tvlv_value: tvlv content - * @tvlv_value_len: tvlv content length - * - * Return: success when processing an OGM or the return value of all called - * handler callbacks. - */ -int batadv_tvlv_containers_process(struct batadv_priv *bat_priv, - bool ogm_source, - struct batadv_orig_node *orig_node, - u8 *src, u8 *dst, - void *tvlv_value, u16 tvlv_value_len) -{ - struct batadv_tvlv_handler *tvlv_handler; - struct batadv_tvlv_hdr *tvlv_hdr; - u16 tvlv_value_cont_len; - u8 cifnotfound = BATADV_TVLV_HANDLER_OGM_CIFNOTFND; - int ret = NET_RX_SUCCESS; - - while (tvlv_value_len >= sizeof(*tvlv_hdr)) { - tvlv_hdr = tvlv_value; - tvlv_value_cont_len = ntohs(tvlv_hdr->len); - tvlv_value = tvlv_hdr + 1; - tvlv_value_len -= sizeof(*tvlv_hdr); - - if (tvlv_value_cont_len > tvlv_value_len) - break; - - tvlv_handler = batadv_tvlv_handler_get(bat_priv, - tvlv_hdr->type, - tvlv_hdr->version); - - ret |= batadv_tvlv_call_handler(bat_priv, tvlv_handler, - ogm_source, orig_node, - src, dst, tvlv_value, - tvlv_value_cont_len); - if (tvlv_handler) - batadv_tvlv_handler_put(tvlv_handler); - tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len; - tvlv_value_len -= tvlv_value_cont_len; - } - - if (!ogm_source) - return ret; - - rcu_read_lock(); - hlist_for_each_entry_rcu(tvlv_handler, - &bat_priv->tvlv.handler_list, list) { - if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) && - !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED)) - tvlv_handler->ogm_handler(bat_priv, orig_node, - cifnotfound, NULL, 0); - - tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED; - } - rcu_read_unlock(); - - return NET_RX_SUCCESS; -} - -/** - * batadv_tvlv_ogm_receive - process an incoming ogm and call the appropriate - * handlers - * @bat_priv: the bat priv with all the soft interface information - * @batadv_ogm_packet: ogm packet containing the tvlv containers - * @orig_node: orig node emitting the ogm packet - */ -void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, - struct batadv_ogm_packet *batadv_ogm_packet, - struct batadv_orig_node *orig_node) -{ - void *tvlv_value; - u16 tvlv_value_len; - - if (!batadv_ogm_packet) - return; - - tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len); - if (!tvlv_value_len) - return; - - tvlv_value = batadv_ogm_packet + 1; - - batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL, - tvlv_value, tvlv_value_len); -} - -/** - * batadv_tvlv_handler_register - register tvlv handler based on the provided - * type and version (both need to match) for ogm tvlv payload and/or unicast - * payload - * @bat_priv: the bat priv with all the soft interface information - * @optr: ogm tvlv handler callback function. This function receives the orig - * node, flags and the tvlv content as argument to process. - * @uptr: unicast tvlv handler callback function. This function receives the - * source & destination of the unicast packet as well as the tvlv content - * to process. - * @type: tvlv handler type to be registered - * @version: tvlv handler version to be registered - * @flags: flags to enable or disable TVLV API behavior - */ -void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, - void (*optr)(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig, - u8 flags, - void *tvlv_value, - u16 tvlv_value_len), - int (*uptr)(struct batadv_priv *bat_priv, - u8 *src, u8 *dst, - void *tvlv_value, - u16 tvlv_value_len), - u8 type, u8 version, u8 flags) -{ - struct batadv_tvlv_handler *tvlv_handler; - - tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); - if (tvlv_handler) { - batadv_tvlv_handler_put(tvlv_handler); - return; - } - - tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC); - if (!tvlv_handler) - return; - - tvlv_handler->ogm_handler = optr; - tvlv_handler->unicast_handler = uptr; - tvlv_handler->type = type; - tvlv_handler->version = version; - tvlv_handler->flags = flags; - kref_init(&tvlv_handler->refcount); - INIT_HLIST_NODE(&tvlv_handler->list); - - spin_lock_bh(&bat_priv->tvlv.handler_list_lock); - hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list); - spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); -} - -/** - * batadv_tvlv_handler_unregister - unregister tvlv handler based on the - * provided type and version (both need to match) - * @bat_priv: the bat priv with all the soft interface information - * @type: tvlv handler type to be unregistered - * @version: tvlv handler version to be unregistered - */ -void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, - u8 type, u8 version) -{ - struct batadv_tvlv_handler *tvlv_handler; - - tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version); - if (!tvlv_handler) - return; - - batadv_tvlv_handler_put(tvlv_handler); - spin_lock_bh(&bat_priv->tvlv.handler_list_lock); - hlist_del_rcu(&tvlv_handler->list); - spin_unlock_bh(&bat_priv->tvlv.handler_list_lock); - batadv_tvlv_handler_put(tvlv_handler); -} - -/** - * batadv_tvlv_unicast_send - send a unicast packet with tvlv payload to the - * specified host - * @bat_priv: the bat priv with all the soft interface information - * @src: source mac address of the unicast packet - * @dst: destination mac address of the unicast packet - * @type: tvlv type - * @version: tvlv version - * @tvlv_value: tvlv content - * @tvlv_value_len: tvlv content length - */ -void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, - u8 *dst, u8 type, u8 version, - void *tvlv_value, u16 tvlv_value_len) -{ - struct batadv_unicast_tvlv_packet *unicast_tvlv_packet; - struct batadv_tvlv_hdr *tvlv_hdr; - struct batadv_orig_node *orig_node; - struct sk_buff *skb; - unsigned char *tvlv_buff; - unsigned int tvlv_len; - ssize_t hdr_len = sizeof(*unicast_tvlv_packet); - - orig_node = batadv_orig_hash_find(bat_priv, dst); - if (!orig_node) - return; - - tvlv_len = sizeof(*tvlv_hdr) + tvlv_value_len; - - skb = netdev_alloc_skb_ip_align(NULL, ETH_HLEN + hdr_len + tvlv_len); - if (!skb) - goto out; - - skb->priority = TC_PRIO_CONTROL; - skb_reserve(skb, ETH_HLEN); - tvlv_buff = skb_put(skb, sizeof(*unicast_tvlv_packet) + tvlv_len); - unicast_tvlv_packet = (struct batadv_unicast_tvlv_packet *)tvlv_buff; - unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV; - unicast_tvlv_packet->version = BATADV_COMPAT_VERSION; - unicast_tvlv_packet->ttl = BATADV_TTL; - unicast_tvlv_packet->reserved = 0; - unicast_tvlv_packet->tvlv_len = htons(tvlv_len); - unicast_tvlv_packet->align = 0; - ether_addr_copy(unicast_tvlv_packet->src, src); - ether_addr_copy(unicast_tvlv_packet->dst, dst); - - tvlv_buff = (unsigned char *)(unicast_tvlv_packet + 1); - tvlv_hdr = (struct batadv_tvlv_hdr *)tvlv_buff; - tvlv_hdr->version = version; - tvlv_hdr->type = type; - tvlv_hdr->len = htons(tvlv_value_len); - tvlv_buff += sizeof(*tvlv_hdr); - memcpy(tvlv_buff, tvlv_value, tvlv_value_len); - - if (batadv_send_skb_to_orig(skb, orig_node, NULL) == NET_XMIT_DROP) - kfree_skb(skb); -out: - batadv_orig_node_put(orig_node); -} - -/** * batadv_get_vid - extract the VLAN identifier from skb if any * @skb: the buffer containing the packet * @header_len: length of the batman header preceding the ethernet header diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 94bf4f8..e523a38 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -190,7 +190,6 @@ enum batadv_uev_type {

#include "types.h"

-struct batadv_ogm_packet; struct seq_file; struct sk_buff;

@@ -372,39 +371,6 @@ static inline u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) */ #define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0]))

-void batadv_tvlv_container_register(struct batadv_priv *bat_priv, - u8 type, u8 version, - void *tvlv_value, u16 tvlv_value_len); -u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv, - unsigned char **packet_buff, - int *packet_buff_len, int packet_min_len); -void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, - struct batadv_ogm_packet *batadv_ogm_packet, - struct batadv_orig_node *orig_node); -void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, - u8 type, u8 version); - -void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, - void (*optr)(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig, - u8 flags, - void *tvlv_value, - u16 tvlv_value_len), - int (*uptr)(struct batadv_priv *bat_priv, - u8 *src, u8 *dst, - void *tvlv_value, - u16 tvlv_value_len), - u8 type, u8 version, u8 flags); -void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, - u8 type, u8 version); -int batadv_tvlv_containers_process(struct batadv_priv *bat_priv, - bool ogm_source, - struct batadv_orig_node *orig_node, - u8 *src, u8 *dst, - void *tvlv_buff, u16 tvlv_buff_len); -void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, - u8 *dst, u8 type, u8 version, - void *tvlv_value, u16 tvlv_value_len); unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len); bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid);

diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index d3222db..0e7d78f 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -57,6 +57,7 @@ #include "hash.h" #include "packet.h" #include "translation-table.h" +#include "tvlv.h"

/** * batadv_mcast_get_bridge - get the bridge on top of the softif if it exists diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index 678f068..d0383de 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c @@ -55,6 +55,7 @@ #include "packet.h" #include "routing.h" #include "send.h" +#include "tvlv.h"

static struct lock_class_key batadv_nc_coding_hash_lock_class_key; static struct lock_class_key batadv_nc_decoding_hash_lock_class_key; diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 93ee5c7..1d66289 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -46,6 +46,7 @@ #include "send.h" #include "soft-interface.h" #include "translation-table.h" +#include "tvlv.h"

static int batadv_route_unicast_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if); diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 72abab7..fcbe287 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -51,6 +51,7 @@ #include "originator.h" #include "packet.h" #include "soft-interface.h" +#include "tvlv.h"

/* hash class keys */ static struct lock_class_key batadv_tt_local_hash_lock_class_key; diff --git a/net/batman-adv/main.c b/net/batman-adv/tvlv.c similarity index 50% copy from net/batman-adv/main.c copy to net/batman-adv/tvlv.c index e78b318..2fd542e 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/tvlv.c @@ -17,632 +17,29 @@

#include "main.h"

-#include <linux/atomic.h> -#include <linux/bug.h> #include <linux/byteorder/generic.h> -#include <linux/crc32c.h> -#include <linux/errno.h> +#include <linux/etherdevice.h> #include <linux/fs.h> #include <linux/if_ether.h> -#include <linux/if_vlan.h> -#include <linux/init.h> -#include <linux/ip.h> -#include <linux/ipv6.h> #include <linux/kernel.h> #include <linux/kref.h> #include <linux/list.h> #include <linux/lockdep.h> -#include <linux/module.h> -#include <linux/moduleparam.h> #include <linux/netdevice.h> #include <linux/pkt_sched.h> #include <linux/rculist.h> #include <linux/rcupdate.h> -#include <linux/seq_file.h> #include <linux/skbuff.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/stddef.h> #include <linux/string.h> -#include <linux/workqueue.h> -#include <net/dsfield.h> -#include <net/rtnetlink.h> - -#include "bat_algo.h" -#include "bridge_loop_avoidance.h" -#include "debugfs.h" -#include "distributed-arp-table.h" -#include "gateway_client.h" -#include "gateway_common.h" -#include "hard-interface.h" -#include "icmp_socket.h" -#include "multicast.h" -#include "netlink.h" -#include "network-coding.h" +#include <linux/types.h> + #include "originator.h" #include "packet.h" -#include "routing.h" #include "send.h" -#include "soft-interface.h" -#include "translation-table.h" - -/* List manipulations on hardif_list have to be rtnl_lock()'ed, - * list traversals just rcu-locked - */ -struct list_head batadv_hardif_list; -static int (*batadv_rx_handler[256])(struct sk_buff *, - struct batadv_hard_iface *); -char batadv_routing_algo[20] = "BATMAN_IV"; -static struct hlist_head batadv_algo_list; - -unsigned char batadv_broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; - -struct workqueue_struct *batadv_event_workqueue; - -static void batadv_recv_handler_init(void); - -static int __init batadv_init(void) -{ - INIT_LIST_HEAD(&batadv_hardif_list); - INIT_HLIST_HEAD(&batadv_algo_list); - - batadv_recv_handler_init(); - - batadv_v_init(); - batadv_iv_init(); - batadv_nc_init(); - - batadv_event_workqueue = create_singlethread_workqueue("bat_events"); - - if (!batadv_event_workqueue) - return -ENOMEM; - - batadv_socket_init(); - batadv_debugfs_init(); - - register_netdevice_notifier(&batadv_hard_if_notifier); - rtnl_link_register(&batadv_link_ops); - batadv_netlink_register(); - - pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", - BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); - - return 0; -} - -static void __exit batadv_exit(void) -{ - batadv_debugfs_destroy(); - batadv_netlink_unregister(); - rtnl_link_unregister(&batadv_link_ops); - unregister_netdevice_notifier(&batadv_hard_if_notifier); - batadv_hardif_remove_interfaces(); - - flush_workqueue(batadv_event_workqueue); - destroy_workqueue(batadv_event_workqueue); - batadv_event_workqueue = NULL; - - rcu_barrier(); -} - -int batadv_mesh_init(struct net_device *soft_iface) -{ - struct batadv_priv *bat_priv = netdev_priv(soft_iface); - int ret; - - spin_lock_init(&bat_priv->forw_bat_list_lock); - spin_lock_init(&bat_priv->forw_bcast_list_lock); - spin_lock_init(&bat_priv->tt.changes_list_lock); - spin_lock_init(&bat_priv->tt.req_list_lock); - spin_lock_init(&bat_priv->tt.roam_list_lock); - spin_lock_init(&bat_priv->tt.last_changeset_lock); - spin_lock_init(&bat_priv->tt.commit_lock); - spin_lock_init(&bat_priv->gw.list_lock); -#ifdef CONFIG_BATMAN_ADV_MCAST - spin_lock_init(&bat_priv->mcast.want_lists_lock); -#endif - spin_lock_init(&bat_priv->tvlv.container_list_lock); - spin_lock_init(&bat_priv->tvlv.handler_list_lock); - spin_lock_init(&bat_priv->softif_vlan_list_lock); - - INIT_HLIST_HEAD(&bat_priv->forw_bat_list); - INIT_HLIST_HEAD(&bat_priv->forw_bcast_list); - INIT_HLIST_HEAD(&bat_priv->gw.list); -#ifdef CONFIG_BATMAN_ADV_MCAST - INIT_HLIST_HEAD(&bat_priv->mcast.want_all_unsnoopables_list); - INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv4_list); - INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv6_list); -#endif - INIT_LIST_HEAD(&bat_priv->tt.changes_list); - INIT_HLIST_HEAD(&bat_priv->tt.req_list); - INIT_LIST_HEAD(&bat_priv->tt.roam_list); -#ifdef CONFIG_BATMAN_ADV_MCAST - INIT_HLIST_HEAD(&bat_priv->mcast.mla_list); -#endif - INIT_HLIST_HEAD(&bat_priv->tvlv.container_list); - INIT_HLIST_HEAD(&bat_priv->tvlv.handler_list); - INIT_HLIST_HEAD(&bat_priv->softif_vlan_list); - - ret = batadv_v_mesh_init(bat_priv); - if (ret < 0) - goto err; - - ret = batadv_originator_init(bat_priv); - if (ret < 0) - goto err; - - ret = batadv_tt_init(bat_priv); - if (ret < 0) - goto err; - - ret = batadv_bla_init(bat_priv); - if (ret < 0) - goto err; - - ret = batadv_dat_init(bat_priv); - if (ret < 0) - goto err; - - ret = batadv_nc_mesh_init(bat_priv); - if (ret < 0) - goto err; - - batadv_gw_init(bat_priv); - batadv_mcast_init(bat_priv); - - atomic_set(&bat_priv->gw.reselect, 0); - atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); - - return 0; - -err: - batadv_mesh_free(soft_iface); - return ret; -} - -void batadv_mesh_free(struct net_device *soft_iface) -{ - struct batadv_priv *bat_priv = netdev_priv(soft_iface); - - atomic_set(&bat_priv->mesh_state, BATADV_MESH_DEACTIVATING); - - batadv_purge_outstanding_packets(bat_priv, NULL); - - batadv_gw_node_free(bat_priv); - - batadv_v_mesh_free(bat_priv); - batadv_nc_mesh_free(bat_priv); - batadv_dat_free(bat_priv); - batadv_bla_free(bat_priv); - - batadv_mcast_free(bat_priv); - - /* Free the TT and the originator tables only after having terminated - * all the other depending components which may use these structures for - * their purposes. - */ - batadv_tt_free(bat_priv); - - /* Since the originator table clean up routine is accessing the TT - * tables as well, it has to be invoked after the TT tables have been - * freed and marked as empty. This ensures that no cleanup RCU callbacks - * accessing the TT data are scheduled for later execution. - */ - batadv_originator_free(bat_priv); - - batadv_gw_free(bat_priv); - - free_percpu(bat_priv->bat_counters); - bat_priv->bat_counters = NULL; - - atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); -} - -/** - * batadv_is_my_mac - check if the given mac address belongs to any of the real - * interfaces in the current mesh - * @bat_priv: the bat priv with all the soft interface information - * @addr: the address to check - * - * Return: 'true' if the mac address was found, false otherwise. - */ -bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr) -{ - const struct batadv_hard_iface *hard_iface; - bool is_my_mac = false; - - rcu_read_lock(); - list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { - if (hard_iface->if_status != BATADV_IF_ACTIVE) - continue; - - if (hard_iface->soft_iface != bat_priv->soft_iface) - continue; - - if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) { - is_my_mac = true; - break; - } - } - rcu_read_unlock(); - return is_my_mac; -} - -/** - * batadv_seq_print_text_primary_if_get - called from debugfs table printing - * function that requires the primary interface - * @seq: debugfs table seq_file struct - * - * Return: primary interface if found or NULL otherwise. - */ -struct batadv_hard_iface * -batadv_seq_print_text_primary_if_get(struct seq_file *seq) -{ - struct net_device *net_dev = (struct net_device *)seq->private; - struct batadv_priv *bat_priv = netdev_priv(net_dev); - struct batadv_hard_iface *primary_if; - - primary_if = batadv_primary_if_get_selected(bat_priv); - - if (!primary_if) { - seq_printf(seq, - "BATMAN mesh %s disabled - please specify interfaces to enable it\n", - net_dev->name); - goto out; - } - - if (primary_if->if_status == BATADV_IF_ACTIVE) - goto out; - - seq_printf(seq, - "BATMAN mesh %s disabled - primary interface not active\n", - net_dev->name); - batadv_hardif_put(primary_if); - primary_if = NULL; - -out: - return primary_if; -} - -/** - * batadv_max_header_len - calculate maximum encapsulation overhead for a - * payload packet - * - * Return: the maximum encapsulation overhead in bytes. - */ -int batadv_max_header_len(void) -{ - int header_len = 0; - - header_len = max_t(int, header_len, - sizeof(struct batadv_unicast_packet)); - header_len = max_t(int, header_len, - sizeof(struct batadv_unicast_4addr_packet)); - header_len = max_t(int, header_len, - sizeof(struct batadv_bcast_packet)); - -#ifdef CONFIG_BATMAN_ADV_NC - header_len = max_t(int, header_len, - sizeof(struct batadv_coded_packet)); -#endif - - return header_len + ETH_HLEN; -} - -/** - * batadv_skb_set_priority - sets skb priority according to packet content - * @skb: the packet to be sent - * @offset: offset to the packet content - * - * This function sets a value between 256 and 263 (802.1d priority), which - * can be interpreted by the cfg80211 or other drivers. - */ -void batadv_skb_set_priority(struct sk_buff *skb, int offset) -{ - struct iphdr ip_hdr_tmp, *ip_hdr; - struct ipv6hdr ip6_hdr_tmp, *ip6_hdr; - struct ethhdr ethhdr_tmp, *ethhdr; - struct vlan_ethhdr *vhdr, vhdr_tmp; - u32 prio; - - /* already set, do nothing */ - if (skb->priority >= 256 && skb->priority <= 263) - return; - - ethhdr = skb_header_pointer(skb, offset, sizeof(*ethhdr), &ethhdr_tmp); - if (!ethhdr) - return; - - switch (ethhdr->h_proto) { - case htons(ETH_P_8021Q): - vhdr = skb_header_pointer(skb, offset + sizeof(*vhdr), - sizeof(*vhdr), &vhdr_tmp); - if (!vhdr) - return; - prio = ntohs(vhdr->h_vlan_TCI) & VLAN_PRIO_MASK; - prio = prio >> VLAN_PRIO_SHIFT; - break; - case htons(ETH_P_IP): - ip_hdr = skb_header_pointer(skb, offset + sizeof(*ethhdr), - sizeof(*ip_hdr), &ip_hdr_tmp); - if (!ip_hdr) - return; - prio = (ipv4_get_dsfield(ip_hdr) & 0xfc) >> 5; - break; - case htons(ETH_P_IPV6): - ip6_hdr = skb_header_pointer(skb, offset + sizeof(*ethhdr), - sizeof(*ip6_hdr), &ip6_hdr_tmp); - if (!ip6_hdr) - return; - prio = (ipv6_get_dsfield(ip6_hdr) & 0xfc) >> 5; - break; - default: - return; - } - - skb->priority = prio + 256; -} - -static int batadv_recv_unhandled_packet(struct sk_buff *skb, - struct batadv_hard_iface *recv_if) -{ - return NET_RX_DROP; -} - -/* incoming packets with the batman ethertype received on any active hard - * interface - */ -int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *ptype, - struct net_device *orig_dev) -{ - struct batadv_priv *bat_priv; - struct batadv_ogm_packet *batadv_ogm_packet; - struct batadv_hard_iface *hard_iface; - u8 idx; - int ret; - - hard_iface = container_of(ptype, struct batadv_hard_iface, - batman_adv_ptype); - - /* Prevent processing a packet received on an interface which is getting - * shut down otherwise the packet may trigger de-reference errors - * further down in the receive path. - */ - if (!kref_get_unless_zero(&hard_iface->refcount)) - goto err_out; - - skb = skb_share_check(skb, GFP_ATOMIC); - - /* skb was released by skb_share_check() */ - if (!skb) - goto err_put; - - /* packet should hold at least type and version */ - if (unlikely(!pskb_may_pull(skb, 2))) - goto err_free; - - /* expect a valid ethernet header here. */ - if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb))) - goto err_free; - - if (!hard_iface->soft_iface) - goto err_free; - - bat_priv = netdev_priv(hard_iface->soft_iface); - - if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) - goto err_free; - - /* discard frames on not active interfaces */ - if (hard_iface->if_status != BATADV_IF_ACTIVE) - goto err_free; - - batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data; - - if (batadv_ogm_packet->version != BATADV_COMPAT_VERSION) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Drop packet: incompatible batman version (%i)\n", - batadv_ogm_packet->version); - goto err_free; - } - - /* reset control block to avoid left overs from previous users */ - memset(skb->cb, 0, sizeof(struct batadv_skb_cb)); - - /* all receive handlers return whether they received or reused - * the supplied skb. if not, we have to free the skb. - */ - idx = batadv_ogm_packet->packet_type; - ret = (*batadv_rx_handler[idx])(skb, hard_iface); - - if (ret == NET_RX_DROP) - kfree_skb(skb); - - batadv_hardif_put(hard_iface); - - /* return NET_RX_SUCCESS in any case as we - * most probably dropped the packet for - * routing-logical reasons. - */ - return NET_RX_SUCCESS; - -err_free: - kfree_skb(skb); -err_put: - batadv_hardif_put(hard_iface); -err_out: - return NET_RX_DROP; -} - -static void batadv_recv_handler_init(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++) - batadv_rx_handler[i] = batadv_recv_unhandled_packet; - - for (i = BATADV_UNICAST_MIN; i <= BATADV_UNICAST_MAX; i++) - batadv_rx_handler[i] = batadv_recv_unhandled_unicast_packet; - - /* compile time checks for sizes */ - BUILD_BUG_ON(sizeof(struct batadv_bla_claim_dst) != 6); - BUILD_BUG_ON(sizeof(struct batadv_ogm_packet) != 24); - BUILD_BUG_ON(sizeof(struct batadv_icmp_header) != 20); - BUILD_BUG_ON(sizeof(struct batadv_icmp_packet) != 20); - BUILD_BUG_ON(sizeof(struct batadv_icmp_packet_rr) != 116); - BUILD_BUG_ON(sizeof(struct batadv_unicast_packet) != 10); - BUILD_BUG_ON(sizeof(struct batadv_unicast_4addr_packet) != 18); - BUILD_BUG_ON(sizeof(struct batadv_frag_packet) != 20); - BUILD_BUG_ON(sizeof(struct batadv_bcast_packet) != 14); - BUILD_BUG_ON(sizeof(struct batadv_coded_packet) != 46); - BUILD_BUG_ON(sizeof(struct batadv_unicast_tvlv_packet) != 20); - BUILD_BUG_ON(sizeof(struct batadv_tvlv_hdr) != 4); - BUILD_BUG_ON(sizeof(struct batadv_tvlv_gateway_data) != 8); - BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_vlan_data) != 8); - BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12); - BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8); - - /* broadcast packet */ - batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; - - /* unicast packets ... */ - /* unicast with 4 addresses packet */ - batadv_rx_handler[BATADV_UNICAST_4ADDR] = batadv_recv_unicast_packet; - /* unicast packet */ - batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet; - /* unicast tvlv packet */ - batadv_rx_handler[BATADV_UNICAST_TVLV] = batadv_recv_unicast_tvlv; - /* batman icmp packet */ - batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; - /* Fragmented packets */ - batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_frag_packet; -} - -int -batadv_recv_handler_register(u8 packet_type, - int (*recv_handler)(struct sk_buff *, - struct batadv_hard_iface *)) -{ - int (*curr)(struct sk_buff *, - struct batadv_hard_iface *); - curr = batadv_rx_handler[packet_type]; - - if ((curr != batadv_recv_unhandled_packet) && - (curr != batadv_recv_unhandled_unicast_packet)) - return -EBUSY; - - batadv_rx_handler[packet_type] = recv_handler; - return 0; -} - -void batadv_recv_handler_unregister(u8 packet_type) -{ - batadv_rx_handler[packet_type] = batadv_recv_unhandled_packet; -} - -static struct batadv_algo_ops *batadv_algo_get(char *name) -{ - struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp; - - hlist_for_each_entry(bat_algo_ops_tmp, &batadv_algo_list, list) { - if (strcmp(bat_algo_ops_tmp->name, name) != 0) - continue; - - bat_algo_ops = bat_algo_ops_tmp; - break; - } - - return bat_algo_ops; -} - -int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops) -{ - struct batadv_algo_ops *bat_algo_ops_tmp; - - bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name); - if (bat_algo_ops_tmp) { - pr_info("Trying to register already registered routing algorithm: %s\n", - bat_algo_ops->name); - return -EEXIST; - } - - /* all algorithms must implement all ops (for now) */ - if (!bat_algo_ops->bat_iface_enable || - !bat_algo_ops->bat_iface_disable || - !bat_algo_ops->bat_iface_update_mac || - !bat_algo_ops->bat_primary_iface_set || - !bat_algo_ops->bat_neigh_cmp || - !bat_algo_ops->bat_neigh_is_similar_or_better) { - pr_info("Routing algo '%s' does not implement required ops\n", - bat_algo_ops->name); - return -EINVAL; - } - - INIT_HLIST_NODE(&bat_algo_ops->list); - hlist_add_head(&bat_algo_ops->list, &batadv_algo_list); - - return 0; -} - -int batadv_algo_select(struct batadv_priv *bat_priv, char *name) -{ - struct batadv_algo_ops *bat_algo_ops; - - bat_algo_ops = batadv_algo_get(name); - if (!bat_algo_ops) - return -EINVAL; - - bat_priv->bat_algo_ops = bat_algo_ops; - - return 0; -} - -int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) -{ - struct batadv_algo_ops *bat_algo_ops; - - seq_puts(seq, "Available routing algorithms:\n"); - - hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { - seq_printf(seq, " * %s\n", bat_algo_ops->name); - } - - return 0; -} - -/** - * batadv_skb_crc32 - calculate CRC32 of the whole packet and skip bytes in - * the header - * @skb: skb pointing to fragmented socket buffers - * @payload_ptr: Pointer to position inside the head buffer of the skb - * marking the start of the data to be CRC'ed - * - * payload_ptr must always point to an address in the skb head buffer and not to - * a fragment. - * - * Return: big endian crc32c of the checksummed data - */ -__be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr) -{ - u32 crc = 0; - unsigned int from; - unsigned int to = skb->len; - struct skb_seq_state st; - const u8 *data; - unsigned int len; - unsigned int consumed = 0; - - from = (unsigned int)(payload_ptr - skb->data); - - skb_prepare_seq_read(skb, from, to, &st); - while ((len = skb_seq_read(consumed, &data, &st)) != 0) { - crc = crc32c(crc, data, len); - consumed += len; - } - - return htonl(crc); -} +#include "tvlv.h"

/** * batadv_tvlv_handler_release - release tvlv handler from lists and queue for @@ -1231,96 +628,3 @@ void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, out: batadv_orig_node_put(orig_node); } - -/** - * batadv_get_vid - extract the VLAN identifier from skb if any - * @skb: the buffer containing the packet - * @header_len: length of the batman header preceding the ethernet header - * - * Return: VID with the BATADV_VLAN_HAS_TAG flag when the packet embedded in the - * skb is vlan tagged. Otherwise BATADV_NO_FLAGS. - */ -unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len) -{ - struct ethhdr *ethhdr = (struct ethhdr *)(skb->data + header_len); - struct vlan_ethhdr *vhdr; - unsigned short vid; - - if (ethhdr->h_proto != htons(ETH_P_8021Q)) - return BATADV_NO_FLAGS; - - if (!pskb_may_pull(skb, header_len + VLAN_ETH_HLEN)) - return BATADV_NO_FLAGS; - - vhdr = (struct vlan_ethhdr *)(skb->data + header_len); - vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; - vid |= BATADV_VLAN_HAS_TAG; - - return vid; -} - -/** - * batadv_vlan_ap_isola_get - return the AP isolation status for the given vlan - * @bat_priv: the bat priv with all the soft interface information - * @vid: the VLAN identifier for which the AP isolation attributed as to be - * looked up - * - * Return: true if AP isolation is on for the VLAN idenfied by vid, false - * otherwise - */ -bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid) -{ - bool ap_isolation_enabled = false; - struct batadv_softif_vlan *vlan; - - /* if the AP isolation is requested on a VLAN, then check for its - * setting in the proper VLAN private data structure - */ - vlan = batadv_softif_vlan_get(bat_priv, vid); - if (vlan) { - ap_isolation_enabled = atomic_read(&vlan->ap_isolation); - batadv_softif_vlan_put(vlan); - } - - return ap_isolation_enabled; -} - -static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) -{ - struct batadv_algo_ops *bat_algo_ops; - char *algo_name = (char *)val; - size_t name_len = strlen(algo_name); - - if (name_len > 0 && algo_name[name_len - 1] == '\n') - algo_name[name_len - 1] = '\0'; - - bat_algo_ops = batadv_algo_get(algo_name); - if (!bat_algo_ops) { - pr_err("Routing algorithm '%s' is not supported\n", algo_name); - return -EINVAL; - } - - return param_set_copystring(algo_name, kp); -} - -static const struct kernel_param_ops batadv_param_ops_ra = { - .set = batadv_param_set_ra, - .get = param_get_string, -}; - -static struct kparam_string batadv_param_string_ra = { - .maxlen = sizeof(batadv_routing_algo), - .string = batadv_routing_algo, -}; - -module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, - 0644); -module_init(batadv_init); -module_exit(batadv_exit); - -MODULE_LICENSE("GPL"); - -MODULE_AUTHOR(BATADV_DRIVER_AUTHOR); -MODULE_DESCRIPTION(BATADV_DRIVER_DESC); -MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE); -MODULE_VERSION(BATADV_SOURCE_VERSION); diff --git a/net/batman-adv/tvlv.h b/net/batman-adv/tvlv.h new file mode 100644 index 0000000..e4369b5 --- /dev/null +++ b/net/batman-adv/tvlv.h @@ -0,0 +1,61 @@ +/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see http://www.gnu.org/licenses/. + */ + +#ifndef _NET_BATMAN_ADV_TVLV_H_ +#define _NET_BATMAN_ADV_TVLV_H_ + +#include "main.h" + +#include <linux/types.h> + +struct batadv_ogm_packet; + +void batadv_tvlv_container_register(struct batadv_priv *bat_priv, + u8 type, u8 version, + void *tvlv_value, u16 tvlv_value_len); +u16 batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv, + unsigned char **packet_buff, + int *packet_buff_len, int packet_min_len); +void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, + struct batadv_ogm_packet *batadv_ogm_packet, + struct batadv_orig_node *orig_node); +void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, + u8 type, u8 version); + +void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, + void (*optr)(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + u8 flags, + void *tvlv_value, + u16 tvlv_value_len), + int (*uptr)(struct batadv_priv *bat_priv, + u8 *src, u8 *dst, + void *tvlv_value, + u16 tvlv_value_len), + u8 type, u8 version, u8 flags); +void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, + u8 type, u8 version); +int batadv_tvlv_containers_process(struct batadv_priv *bat_priv, + bool ogm_source, + struct batadv_orig_node *orig_node, + u8 *src, u8 *dst, + void *tvlv_buff, u16 tvlv_buff_len); +void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, u8 *src, + u8 *dst, u8 type, u8 version, + void *tvlv_value, u16 tvlv_value_len); + +#endif /* _NET_BATMAN_ADV_TVLV_H_ */