Add package batman-adv-visdata
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3f78449b9d
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@ -0,0 +1,40 @@
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include $(TOPDIR)/rules.mk
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PKG_NAME:=batman-adv-visdata
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PKG_VERSION:=1
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PKG_LICENSE:=BSD-2-Clause
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PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
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include $(INCLUDE_DIR)/package.mk
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define Package/batman-adv-visdata
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SECTION:=net
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CATEGORY:=Network
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DEPENDS:=
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TITLE:=Pulls the batman-adv originators and transtable_global tables out of the kernel periodically
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endef
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define Build/Prepare
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mkdir -p $(PKG_BUILD_DIR)
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$(CP) ./src/* $(PKG_BUILD_DIR)/
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endef
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define Build/Configure
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endef
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define Build/Compile
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CFLAGS="$(TARGET_CFLAGS)" CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C $(PKG_BUILD_DIR) $(TARGET_CONFIGURE_OPTS)
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endef
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define Package/batman-adv-visdata/install
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$(INSTALL_DIR) $(1)/usr/sbin
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/batman-adv-visdata $(1)/usr/sbin/
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$(INSTALL_DIR) $(1)/etc/init.d
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$(INSTALL_BIN) ./files/batman-adv-visdata.init $(1)/etc/init.d/batman-adv-visdata
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endef
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$(eval $(call BuildPackage,batman-adv-visdata))
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@ -0,0 +1,22 @@
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#!/bin/sh /etc/rc.common
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START=98
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USE_PROCD=1
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start_service() {
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include /lib/functions
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local meshes
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add_mesh() {
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meshes="$meshes $1"
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}
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config_load batman-adv
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config_foreach add_mesh 'mesh'
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procd_open_instance
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procd_set_param command /usr/sbin/batman-adv-visdata $meshes
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procd_set_param respawn ${threshold:-20} ${timeout:-5} ${retry:-3}
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procd_close_instance
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}
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@ -0,0 +1,4 @@
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all: batman-adv-visdata
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batman-adv-visdata: batman-adv-visdata.c
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$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -Wall -o $@ $^ $(LDLIBS)
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@ -0,0 +1,99 @@
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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/*
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* batadv-vis updates its originators every 10s
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* We choose a bigger interval to make reboots even more unlikely,
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* and make our interval coprime with batadv-vis's
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*/
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#define UPDATE_INTERVAL 19
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#define INPUT_DIR "/sys/kernel/debug/batman_adv"
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#define OUTPUT_DIR "/tmp/batman-adv-visdata"
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#define ORIGINATORS "originators"
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#define TRANSTABLE_GLOBAL "transtable_global"
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static bool copy_file(const char *src, const char *dst) {
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FILE *input = NULL, *output = NULL;
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input = fopen(src, "r");
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if (!input)
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goto error;
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output = fopen(dst, "w");
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if (!output)
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goto error;
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while (!feof(input)) {
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if (ferror(input))
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goto error;
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char buf[1024];
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size_t r = fread(buf, 1, sizeof(buf), input);
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if (!r)
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continue;
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if (!fwrite(buf, r, 1, output))
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goto error;
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}
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fclose(input);
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fclose(output);
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return true;
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error:
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if (input)
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fclose(input);
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if (output)
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fclose(output);
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unlink(dst);
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return false;
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}
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static void handle_file(const char *mesh, const char *file) {
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char src[strlen(INPUT_DIR) + 1 + strlen(mesh) + 1 + strlen(file) + 1];
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char dst[strlen(OUTPUT_DIR) + 1 + strlen(mesh) + 1 + strlen(file) + 1];
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char tmp[sizeof(dst) + 4];
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snprintf(src, sizeof(src), "%s/%s/%s", INPUT_DIR, mesh, file);
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snprintf(dst, sizeof(dst), "%s/%s/%s", OUTPUT_DIR, mesh, file);
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snprintf(tmp, sizeof(tmp), "%s.new", dst);
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if (copy_file(src, tmp))
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rename(tmp, dst);
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else
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unlink(dst);
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}
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static void handle_mesh(const char *mesh) {
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char dir[strlen(OUTPUT_DIR) + 1 + strlen(mesh) + 1];
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snprintf(dir, sizeof(dir), "%s/%s", OUTPUT_DIR, mesh);
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mkdir(dir, 0777);
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handle_file(mesh, ORIGINATORS);
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handle_file(mesh, TRANSTABLE_GLOBAL);
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}
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int main(int argc, char *argv[]) {
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system("rm -rf " OUTPUT_DIR "; mkdir -p " OUTPUT_DIR);
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while (true) {
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int i;
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for (i = 1; i < argc; i++)
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handle_mesh(argv[i]);
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sleep(UPDATE_INTERVAL);
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}
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}
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