B.A.T.M.A.N November 2016

b.a.t.m.a.n@lists.open-mesh.org

19 participants
48 discussions

[B.A.T.M.A.N.] [PATCH 00/17] pull request for net-next: batman-adv 2016-10-27

by Simon Wunderlich

Hi David, this is our first feature pull request for batman-adv (mostly containing code cleanup stuff), there are at least two more to come. Please pull or let me know of any problem! Thank you, Simon The following changes since commit 29fbff8698fc0ac1a1d74584b258e0bf18b469f9: Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (2016-10-13 21:40:23 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-next-for-davem-20161027 for you to fetch changes up to 4c7da0f6dbcde2431d773ce03cde5e7abede54e0: batman-adv: Avoid precedence issues in macros (2016-10-19 08:37:54 +0200) ---------------------------------------------------------------- This code cleanup patchset includes the following changes (chronological order): - bump version strings, by Simon Wunderlich - README updates/clean up, by Sven Eckelmann (4 patches) - Code clean up and restructuring by Sven Eckelmann (2 patches) - Kerneldoc fix in forw_packet structure, by Linus Luessing - Remove unused argument in dbg_arp, by Antonio Quartulli - Add support to build batman-adv without wireless, by Linus Luessing - Restructure error handling for is_ap_isolated, by Markus Elfring - Remove unused initialization in various functions, by Sven Eckelmann - Use better names for fragment and gateway list heads, by Sven Eckelmann (2 patches) - Convert to octal permissions for files, by Sven Eckelmann - Avoid precedence issues for some macros, by Sven Eckelmann ---------------------------------------------------------------- Antonio Quartulli (1): batman-adv: remove unsed argument from batadv_dbg_arp() function Linus Lüssing (2): batman-adv: fix batadv_forw_packet kerneldoc for list attribute batman-adv: Allow selecting BATMAN V if CFG80211 is not built Markus Elfring (1): batman-adv: Less function calls in batadv_is_ap_isolated() after error detection Simon Wunderlich (1): batman-adv: Start new development cycle Sven Eckelmann (12): batman-adv: Add B.A.T.M.A.N. V sysfs files to README batman-adv: Add network_coding and mcast sysfs files to README batman-adv: Add dat, mcast, nc and neighbor debugfs files to README batman-adv: Document new nc, mcast and tpmeter log levels batman-adv: Remove unused function batadv_hash_delete batman-adv: Move batadv_sum_counter to soft-interface.c batman-adv: Remove unused batadv_icmp_user_cmd_type batman-adv: Remove needless init of variables on stack batman-adv: Use proper name for fragments list head batman-adv: Use proper name for gateway list head batman-adv: Use octal permissions instead of macros batman-adv: Avoid precedence issues in macros Documentation/networking/batman-adv.txt | 35 ++++++++++++---------- net/batman-adv/Kconfig | 2 +- net/batman-adv/bat_iv_ogm.c | 6 ++-- net/batman-adv/bat_v.c | 8 ++--- net/batman-adv/bat_v_ogm.c | 4 +-- net/batman-adv/debugfs.c | 26 ++++++++-------- net/batman-adv/distributed-arp-table.c | 17 ++++------- net/batman-adv/fragmentation.c | 18 +++++------ net/batman-adv/fragmentation.h | 2 +- net/batman-adv/gateway_client.c | 9 +++--- net/batman-adv/hash.h | 30 ------------------- net/batman-adv/icmp_socket.c | 5 ++-- net/batman-adv/log.c | 4 +-- net/batman-adv/log.h | 12 ++++---- net/batman-adv/main.c | 2 +- net/batman-adv/main.h | 27 ++--------------- net/batman-adv/network-coding.c | 8 ++--- net/batman-adv/originator.c | 10 +++---- net/batman-adv/packet.h | 12 +------- net/batman-adv/send.c | 2 +- net/batman-adv/soft-interface.c | 21 +++++++++++++ net/batman-adv/sysfs.c | 53 ++++++++++++++------------------- net/batman-adv/translation-table.c | 25 +++++++--------- net/batman-adv/types.h | 16 +++++----- 24 files changed, 149 insertions(+), 205 deletions(-)

4 years, 10 months

[B.A.T.M.A.N.] [PATCH] batman-adv: Deinline batadv_orig_hash_find, save 9024 bytes

by Denys Vlasenko

This function compiles to 473 bytes of machine code. 21 callsites. text data bss dec hex filename 95903266 20860288 35991552 152755106 91adba2 vmlinux_before 95894242 20860288 35991552 152746082 91ab862 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk(a)redhat.com> CC: Marek Lindner <mareklindner(a)neomailbox.ch> CC: Simon Wunderlich <sw(a)simonwunderlich.de> CC: Antonio Quartulli <a(a)unstable.cc> CC: Sven Eckelmann <sven(a)narfation.org> CC: b.a.t.m.a.n(a)lists.open-mesh.org CC: linux-kernel(a)vger.kernel.org --- net/batman-adv/originator.c | 29 +++++++++++++++++++++++++++++ net/batman-adv/originator.h | 31 ++----------------------------- 2 files changed, 31 insertions(+), 29 deletions(-) diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index e4cbb07..bcf78f1 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -47,6 +47,36 @@ /* hash class keys */ static struct lock_class_key batadv_orig_hash_lock_class_key; +struct batadv_orig_node * +batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; + int index; + + if (!hash) + return NULL; + + index = batadv_choose_orig(data, hash->size); + head = &hash->table[index]; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (!batadv_compare_eth(orig_node, data)) + continue; + + if (!kref_get_unless_zero(&orig_node->refcount)) + continue; + + orig_node_tmp = orig_node; + break; + } + rcu_read_unlock(); + + return orig_node_tmp; +} + static void batadv_purge_orig(struct work_struct *work); /** diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 4e8b67f..db7a87d 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -96,34 +96,7 @@ static inline u32 batadv_choose_orig(const void *data, u32 size) return hash % size; } -static inline struct batadv_orig_node * -batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) -{ - struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_head *head; - struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; - int index; - - if (!hash) - return NULL; - - index = batadv_choose_orig(data, hash->size); - head = &hash->table[index]; - - rcu_read_lock(); - hlist_for_each_entry_rcu(orig_node, head, hash_entry) { - if (!batadv_compare_eth(orig_node, data)) - continue; - - if (!kref_get_unless_zero(&orig_node->refcount)) - continue; - - orig_node_tmp = orig_node; - break; - } - rcu_read_unlock(); - - return orig_node_tmp; -} +struct batadv_orig_node * +batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data); #endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */ -- 1.8.1.4

5 years, 7 months

[B.A.T.M.A.N.] [PATCH v7 1/5] batman-adv: prevent multiple ARP replies sent by gateways if dat enabled

by Sven Eckelmann

From: Andreas Pape <APape(a)phoenixcontact.com> If dat is enabled it must be made sure that only the backbone gw which has claimed the remote destination for the ARP request answers the ARP request directly if the MAC address is known due to the local dat table. This prevents multiple ARP replies in a common backbone if more than one gateway already knows the remote mac searched for in the ARP request. Signed-off-by: Andreas Pape <apape(a)phoenixcontact.com> Acked-by: Simon Wunderlich <sw(a)simonwunderlich.de> [sven(a)narfation.org: fix conflicts with current version] Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/bridge_loop_avoidance.c | 49 ++++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 11 ++++++++ net/batman-adv/distributed-arp-table.c | 15 +++++++++++ 3 files changed, 75 insertions(+) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index e7f690b..41ab4a6 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -2450,3 +2450,52 @@ out: return ret; } + +#ifdef CONFIG_BATMAN_ADV_DAT +/** + * batadv_bla_check_claim - check if address is claimed + * + * @bat_priv: the bat priv with all the soft interface information + * @addr: mac address of which the claim status is checked + * @vid: the VLAN ID + * + * addr is checked if this address is claimed by the local device itself. + * + * Return: true if bla is disabled or the mac is claimed by the device, + * false if the device addr is already claimed by another gateway + */ +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, + u8 *addr, unsigned short vid) +{ + struct batadv_bla_claim search_claim; + struct batadv_bla_claim *claim = NULL; + struct batadv_hard_iface *primary_if = NULL; + bool ret = true; + + if (!atomic_read(&bat_priv->bridge_loop_avoidance)) + return ret; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if) + return ret; + + /* First look if the mac address is claimed */ + ether_addr_copy(search_claim.addr, addr); + search_claim.vid = vid; + + claim = batadv_claim_hash_find(bat_priv, &search_claim); + + /* If there is a claim and we are not owner of the claim, + * return false. + */ + if (claim) { + if (!batadv_compare_eth(claim->backbone_gw->orig, + primary_if->net_dev->dev_addr)) + ret = false; + batadv_claim_put(claim); + } + + batadv_hardif_put(primary_if); + return ret; +} +#endif diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 1ae93e4..86b8740 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -51,6 +51,10 @@ void batadv_bla_status_update(struct net_device *net_dev); int batadv_bla_init(struct batadv_priv *bat_priv); void batadv_bla_free(struct batadv_priv *bat_priv); int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); +#ifdef CONFIG_BATMAN_ADV_DAT +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid); +#endif #define BATADV_BLA_CRC_INIT 0 #else /* ifdef CONFIG_BATMAN_ADV_BLA */ @@ -127,6 +131,13 @@ static inline int batadv_bla_backbone_dump(struct sk_buff *msg, return -EOPNOTSUPP; } +static inline +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid) +{ + return true; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */ #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index e257efd..cf53404 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -43,6 +43,7 @@ #include <linux/workqueue.h> #include <net/arp.h> +#include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "log.h" @@ -1007,6 +1008,20 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, goto out; } + /* If BLA is enabled, only send ARP replies if we have claimed + * the destination for the ARP request or if no one else of + * the backbone gws belonging to our backbone has claimed the + * destination. + */ + if (!batadv_bla_check_claim(bat_priv, + dat_entry->mac_addr, vid)) { + batadv_dbg(BATADV_DBG_DAT, bat_priv, + "Device %pM claimed by another backbone gw. Don't send ARP reply!", + dat_entry->mac_addr); + ret = true; + goto out; + } + skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src, bat_priv->soft_iface, ip_dst, hw_src, dat_entry->mac_addr, hw_src); -- 2.9.3

6 years, 3 months

[B.A.T.M.A.N.] [PATCH v2 0/4] Broadcast Avoidances, Neighborhood Hash

by Linus Lüssing

Hi, Here's the second broadcast avoidance patchset (rebased on the former one). Hopefully, those two patchsets together should be an automatic approach and replacement for the (non-upstream) no-rebroadcast flag patch and the cases it is currently used for. Documentation: * https://www.open-mesh.org/projects/batman-adv/wiki/Broadcast-Avoidances Branch: * https://git.open-mesh.org/batman-adv.git/shortlog/refs/heads/linus/neighhash Regards, Linus

6 years, 4 months

[B.A.T.M.A.N.] [PATCH net-next 1/2] net: batman-adv: Treat NET_XMIT_CN as transmit successfully

by fgao＠ikuai8.com

From: Gao Feng <gfree.wind(a)gmail.com> The tc could return NET_XMIT_CN as one congestion notification, but it does not mean the packet is lost. Other modules like ipvlan, macvlan, and others treat NET_XMIT_CN as success too. So batman-adv should add the NET_XMIT_CN check. Signed-off-by: Gao Feng <gfree.wind(a)gmail.com> --- net/batman-adv/distributed-arp-table.c | 2 +- net/batman-adv/fragmentation.c | 2 +- net/batman-adv/routing.c | 10 +++++----- net/batman-adv/soft-interface.c | 2 +- net/batman-adv/tp_meter.c | 2 +- 5 files changed, 9 insertions(+), 9 deletions(-) diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 49576c5..f6ff4de 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -659,7 +659,7 @@ static bool batadv_dat_send_data(struct batadv_priv *bat_priv, } send_status = batadv_send_unicast_skb(tmp_skb, neigh_node); - if (send_status == NET_XMIT_SUCCESS) { + if (send_status == NET_XMIT_SUCCESS || send_status == NET_XMIT_CN) { /* count the sent packet */ switch (packet_subtype) { case BATADV_P_DAT_DHT_GET: diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c index 9c561e6..5239616 100644 --- a/net/batman-adv/fragmentation.c +++ b/net/batman-adv/fragmentation.c @@ -509,7 +509,7 @@ int batadv_frag_send_packet(struct sk_buff *skb, batadv_add_counter(bat_priv, BATADV_CNT_FRAG_TX_BYTES, skb_fragment->len + ETH_HLEN); ret = batadv_send_unicast_skb(skb_fragment, neigh_node); - if (ret != NET_XMIT_SUCCESS) { + if (ret != NET_XMIT_SUCCESS && ret != NET_XMIT_CN) { ret = NET_XMIT_DROP; goto free_skb; } diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 6713bdf..6b08b26 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -262,7 +262,7 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv, icmph->ttl = BATADV_TTL; res = batadv_send_skb_to_orig(skb, orig_node, NULL); - if (res == NET_XMIT_SUCCESS) + if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN) ret = NET_RX_SUCCESS; /* skb was consumed */ @@ -330,7 +330,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv, icmp_packet->ttl = BATADV_TTL; res = batadv_send_skb_to_orig(skb, orig_node, NULL); - if (res == NET_RX_SUCCESS) + if (res == NET_RX_SUCCESS || res == NET_XMIT_CN) ret = NET_XMIT_SUCCESS; /* skb was consumed */ @@ -424,7 +424,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb, /* route it */ res = batadv_send_skb_to_orig(skb, orig_node, recv_if); - if (res == NET_XMIT_SUCCESS) + if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN) ret = NET_RX_SUCCESS; /* skb was consumed */ @@ -719,14 +719,14 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, len = skb->len; res = batadv_send_skb_to_orig(skb, orig_node, recv_if); - if (res == NET_XMIT_SUCCESS) + if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN) ret = NET_RX_SUCCESS; /* skb was consumed */ skb = NULL; /* translate transmit result into receive result */ - if (res == NET_XMIT_SUCCESS) { + if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN) { /* skb was transmitted and consumed */ batadv_inc_counter(bat_priv, BATADV_CNT_FORWARD); batadv_add_counter(bat_priv, BATADV_CNT_FORWARD_BYTES, diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 7b3494a..60516bb 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -386,7 +386,7 @@ static int batadv_interface_tx(struct sk_buff *skb, ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, vid); } - if (ret != NET_XMIT_SUCCESS) + if (ret != NET_XMIT_SUCCESS && ret != NET_XMIT_CN) goto dropped_freed; } diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c index f156452..44bfb1e 100644 --- a/net/batman-adv/tp_meter.c +++ b/net/batman-adv/tp_meter.c @@ -615,7 +615,7 @@ static int batadv_tp_send_msg(struct batadv_tp_vars *tp_vars, const u8 *src, batadv_tp_fill_prerandom(tp_vars, data, data_len); r = batadv_send_skb_to_orig(skb, orig_node, NULL); - if (r == NET_XMIT_SUCCESS) + if (r == NET_XMIT_SUCCESS || r == NET_XMIT_CN) return 0; return BATADV_TP_REASON_CANT_SEND; -- 1.9.1

6 years, 5 months

[B.A.T.M.A.N.] [PATCH] batman-adv: don't add loop detect macs to TT

by Simon Wunderlich

From: Simon Wunderlich <simon.wunderlich(a)open-mesh.com> The bridge loop avoidance (BLA) feature of batman-adv sends packets to probe for Mesh/LAN packet loops. Those packets are not sent by real clients and should therefore not be added to the translation table (TT). Signed-off-by: Simon Wunderlich <simon.wunderlich(a)open-mesh.com> --- net/batman-adv/bridge_loop_avoidance.h | 18 ++++++++++++++++++ net/batman-adv/soft-interface.c | 3 ++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 1ae93e4..af550d8 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -20,6 +20,8 @@ #include "main.h" +#include <linux/compiler.h> +#include <linux/stddef.h> #include <linux/types.h> struct net_device; @@ -27,6 +29,22 @@ struct netlink_callback; struct seq_file; struct sk_buff; +/** + * batadv_bla_is_loopdetect_mac - check if the mac address is from a loop detect + * frame sent by bridge loop avoidance + * @mac: mac address to check + * + * Returns true if the it looks like a loop detect frame + * (mac starts with BA:BE), false otherwise + */ +static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac) +{ + if (mac[0] == 0xba && mac[1] == 0xbe) + return true; + + return false; +} + #ifdef CONFIG_BATMAN_ADV_BLA bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, unsigned short vid, bool is_bcast); diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 7b3494a..1f55b4b 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -258,7 +258,8 @@ static int batadv_interface_tx(struct sk_buff *skb, ethhdr = eth_hdr(skb); /* Register the client MAC in the transtable */ - if (!is_multicast_ether_addr(ethhdr->h_source)) { + if (!is_multicast_ether_addr(ethhdr->h_source) && + !batadv_bla_is_loopdetect_mac(ethhdr->h_source)) { client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, vid, skb->skb_iif, skb->mark); -- 2.10.2

6 years, 5 months

[B.A.T.M.A.N.] [bug report] batman-adv: make the TT CRC logic VLAN specific

by Dan Carpenter

Hello Antonio Quartulli, The patch 7ea7b4a14275: "batman-adv: make the TT CRC logic VLAN specific" from Jul 30, 2013, leads to the following static checker warning: net/batman-adv/translation-table.c:3294 batadv_send_my_tt_response() error: uninitialized symbol 'tt_change'. net/batman-adv/translation-table.c 3282 if (!full_table) { 3283 spin_lock_bh(&bat_priv->tt.last_changeset_lock); 3284 3285 tt_len = bat_priv->tt.last_changeset_len; 3286 tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, 3287 &tvlv_tt_data, 3288 &tt_change, 3289 &tt_len); 3290 if (!tt_len) 3291 goto unlock; This should probably be changed to: if (!tt_len || !tvlv_len) goto unlock; There seems to be an assumption that "tt_len" is set to zero on the error path? That's another way to fix this, I suppose. 3292 3293 /* Copy the last orig_node's OGM buffer */ 3294 memcpy(tt_change, bat_priv->tt.last_changeset, 3295 bat_priv->tt.last_changeset_len); 3296 spin_unlock_bh(&bat_priv->tt.last_changeset_lock); 3297 } else { See also: net/batman-adv/translation-table.c:3313 batadv_send_my_tt_response() error: uninitialized symbol 'tt_change'. regards, dan carpenter

6 years, 5 months

[B.A.T.M.A.N.] [PATCH maint] batman-adv: Check for alloc errors when preparing TT local data

by Sven Eckelmann

batadv_tt_prepare_tvlv_local_data can fail to allocate the memory for the new TVLV block. The caller is informed about this problem with the returned length of 0. Not checking this value results in an invalid memory access when either tt_data or tt_change is accessed. Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com> Fixes: 21a57f6e7a3b ("batman-adv: make the TT CRC logic VLAN specific") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- The very good report from Dan Carpenter can be found at https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016713.html net/batman-adv/translation-table.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 7f66309..0dc85eb 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -3282,7 +3282,7 @@ static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, &tvlv_tt_data, &tt_change, &tt_len); - if (!tt_len) + if (!tt_len || !tvlv_len) goto unlock; /* Copy the last orig_node's OGM buffer */ @@ -3300,7 +3300,7 @@ static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, &tvlv_tt_data, &tt_change, &tt_len); - if (!tt_len) + if (!tt_len || !tvlv_len) goto out; /* fill the rest of the tvlv with the real TT entries */ -- 2.10.2

6 years, 6 months

[B.A.T.M.A.N.] Batman-adv over LoRa?

by sam＠bristolwireless.net

Hi All I'm interested in a long-range, low bandwidth, low power mesh network. I'm wondering if it's as easy as buying a Tplink 3020, sticking OpenWrt on it and plugging in a LoRa USB http://webshop.imst.de/radio-modules/lora-products/iu880b-long-range-usb-ad… then configuring BATMAN to talk over that interface? The aim is to Run MDP over it http://developer.servalproject.org/dokuwiki/doku.php?id=content:tech:mdp So that mobile phones can access data/short messages over the wireless interface of the TPlink/ OpenWRT device, using the Serval app https://play.google.com/store/apps/details?id=org.servalproject&hl=en_GB (VOIP isn't going to be possible) So LoRa as level 1 BATMAN as level 2 MDP as level 3 Is this at all feasible? Is it easy? (I suspect not!) Has anyone tried BATMAN over LoRa? More on LoRa here: http://static1.squarespace.com/static/54cecce7e4b054df1848b5f9/t/57489e6e07… Thanks Sam

6 years, 6 months

[B.A.T.M.A.N.] [PATCH net-next 1/2] net: batman-adv: Treat NET_XMIT_CN as transmit successfully

by fgao＠ikuai8.com

6 years, 6 months

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B.A.T.M.A.N November 2016