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gluon-radv-filterd: Add respondd module reporting the chosen gateway

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Jan-Philipp Litza 2017-02-09 19:29:24 +01:00
parent 3bf4d12911
commit a1fea711da
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GPG Key ID: 1FB658053CE27196
5 changed files with 63 additions and 13 deletions
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9
package/gluon-radv-filterd/Makefile
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@ -12,11 +12,7 @@ define Package/gluon-radv-filterd
SECTION:=gluon
CATEGORY:=Gluon
TITLE:=Filter IPv6 router advertisements
DEPENDS:=+gluon-ebtables
endef
define Package/gluon-radv-filterd/description
Gluon community wifi mesh firmware framework: filter IPv6 router advertisements
DEPENDS:=+gluon-ebtables +libgluonutil
endef
define Build/Prepare
@ -38,6 +34,9 @@ define Package/gluon-radv-filterd/install
$(INSTALL_DIR) $(1)/usr/sbin/
$(INSTALL_BIN) $(PKG_BUILD_DIR)/gluon-radv-filterd $(1)/usr/sbin/
$(INSTALL_DIR) $(1)/lib/gluon/respondd
$(CP) $(PKG_BUILD_DIR)/respondd.so $(1)/lib/gluon/respondd/radv-filterd.so
endef
define Package/gluon-radv-filterd/postinst

5
package/gluon-radv-filterd/src/Makefile
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@ -1,4 +1,7 @@
all: gluon-radv-filterd
all: gluon-radv-filterd respondd.so
gluon-radv-filterd: gluon-radv-filterd.c
$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -Wall -o $@ $^ $(LDLIBS)
respondd.so: respondd.c
$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -shared -fPIC -D_GNU_SOURCE -o $@ $^ $(LDLIBS) -lgluonutil

9
package/gluon-radv-filterd/src/gluon-radv-filterd.c
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@ -45,12 +45,13 @@
#include <linux/filter.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <linux/limits.h>
#include <netinet/icmp6.h>
#include <netinet/ip6.h>
#include "mac.h"
// Recheck TQs after this time even if no RA was received
#define MAX_INTERVAL 60
@ -72,10 +73,6 @@
#define TRANSTABLE_GLOBAL DEBUGFS "transtable_global"
#define TRANSTABLE_LOCAL DEBUGFS "transtable_local"
#define F_MAC "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx"
#define F_MAC_IGN "%*2x:%*2x:%*2x:%*2x:%*2x:%*2x"
#define F_MAC_VAR(var) var[0], var[1], var[2], var[3], var[4], var[5]
#ifdef DEBUG
#define CHECK(stmt) \
if(!(stmt)) { \
@ -92,8 +89,6 @@
#define ARRAY_SIZE(A) (sizeof(A)/sizeof(A[0]))
#endif
typedef uint8_t macaddr_t[ETH_ALEN];
struct list_item {
struct list *next;
};

8
package/gluon-radv-filterd/src/mac.h Normal file
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@ -0,0 +1,8 @@
#include <stdint.h>
#include <linux/if_ether.h>
#define F_MAC "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx"
#define F_MAC_IGN "%*2x:%*2x:%*2x:%*2x:%*2x:%*2x"
#define F_MAC_VAR(var) var[0], var[1], var[2], var[3], var[4], var[5]
typedef uint8_t macaddr_t[ETH_ALEN];

45
package/gluon-radv-filterd/src/respondd.c Normal file
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@ -0,0 +1,45 @@
#include <respondd.h>
#include <json-c/json.h>
#include <libgluonutil.h>
#include <stdio.h>
#include "mac.h"
static struct json_object * get_radv_filter() {
FILE *f = popen("exec ebtables -L RADV_FILTER", "r");
char *line = NULL;
size_t len = 0;
macaddr_t mac = { 0 };
struct json_object *ret = NULL;
if (!f)
return NULL;
while (getline(&line, &len, f) > 0) {
if (sscanf(line, "-s " F_MAC " -j ACCEPT\n", F_MAC_VAR(&mac)) == ETH_ALEN)
break;
}
pclose(f);
sprintf(line, F_MAC, F_MAC_VAR(mac));
ret = gluonutil_wrap_string(line);
free(line);
return ret;
}
static struct json_object * respondd_provider_statistics() {
struct json_object *ret = json_object_new_object();
struct json_object *radv_filter = get_radv_filter();
if (radv_filter)
json_object_object_add(ret, "gateway6", radv_filter);
return ret;
}
const struct respondd_provider_info respondd_providers[] = {
{"statistics", respondd_provider_statistics},
{}
};