From: Linus Lüssing <linus.luessing@c0d3.blue>
Date: Tue, 25 Dec 2018 18:24:54 +0100
Subject: alfred: batman-adv-legacy: determine netlink variant via batctl

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

diff --git a/alfred/patches/0003-alfred-batman-adv-legacy-determine-netlink-variant-v.patch b/alfred/patches/0003-alfred-batman-adv-legacy-determine-netlink-variant-v.patch
new file mode 100644
index 0000000000000000000000000000000000000000..01e188f84f5d13b097f4a4e712264fffca6c80fc
--- /dev/null
+++ b/alfred/patches/0003-alfred-batman-adv-legacy-determine-netlink-variant-v.patch
@@ -0,0 +1,89 @@
+From 63bc04d17e7e9c81c334ab619ae275958fb283ec Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
+Date: Tue, 25 Dec 2018 14:13:24 +0100
+Subject: [PATCH] alfred: batman-adv-legacy: determine netlink variant via
+ batctl
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
+---
+ main.c    |  3 +++
+ netlink.c | 14 +++++++++++++-
+ netlink.h |  2 ++
+ 3 files changed, 18 insertions(+), 1 deletion(-)
+
+diff --git a/main.c b/main.c
+index 34d771e..cb63269 100644
+--- a/main.c
++++ b/main.c
+@@ -35,6 +35,7 @@
+ #include "debugfs.h"
+ #include "packet.h"
+ #include "list.h"
++#include "netlink.h"
+ 
+ static struct globals alfred_globals;
+ 
+@@ -183,6 +184,8 @@ static struct globals *alfred_init(int argc, char *argv[])
+ 	/* We need full capabilities to mount debugfs, so do that now */
+ 	debugfs_mount(NULL);
+ 
++	netlink_init();
++
+ 	ret = reduce_capabilities();
+ 	if (ret < 0)
+ 		return NULL;
+diff --git a/netlink.c b/netlink.c
+index 864123f..45cb7e2 100644
+--- a/netlink.c
++++ b/netlink.c
+@@ -40,6 +40,8 @@
+ #define __unused __attribute__((unused))
+ #endif
+ 
++static const char *batadv_nl_name;
++
+ struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
+ 	[BATADV_ATTR_VERSION]			= { .type = NLA_STRING },
+ 	[BATADV_ATTR_ALGO_NAME]			= { .type = NLA_STRING },
+@@ -159,7 +161,7 @@ int netlink_query_common(const char *mesh_iface, uint8_t nl_cmd,
+ 		goto err_free_sock;
+ 	}
+ 
+-	family = genl_ctrl_resolve(sock, BATADV_NL_NAME);
++	family = genl_ctrl_resolve(sock, batadv_nl_name);
+ 	if (family < 0) {
+ 		query_opts->err = -EOPNOTSUPP;
+ 		goto err_free_sock;
+@@ -203,3 +205,13 @@ err_free_sock:
+ 
+ 	return query_opts->err;
+ }
++
++void netlink_init(void)
++{
++	setenv("PATH", "/usr/local/sbin:/usr/sbin:/usr/bin:/sbin:/bin", 1);
++
++	if (system("batctl -v | grep -q '2013.4.0'") == 0)
++		batadv_nl_name = "batadv_legacy";
++	else
++		batadv_nl_name = "batadv";
++}
+diff --git a/netlink.h b/netlink.h
+index f8903be..1d724f6 100644
+--- a/netlink.h
++++ b/netlink.h
+@@ -45,6 +45,8 @@ int netlink_query_common(const char *mesh_iface, uint8_t nl_cmd,
+ int missing_mandatory_attrs(struct nlattr *attrs[],  const int mandatory[],
+ 			    size_t num);
+ 
++void netlink_init(void);
++
+ extern struct nla_policy batadv_netlink_policy[];
+ 
+ #endif /* _ALFRED_NETLINK_H */
+-- 
+2.11.0
+