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/*
* netifd - network interface daemon
* Copyright (C) 2012-2013 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* 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.
*/
#define _GNU_SOURCE
#include <glob.h>
#include <fcntl.h>
#include <stdio.h>
#include "netifd.h"
#include "system.h"
#include "handler.h"
static int
netifd_dir_push(int fd)
{
int prev_fd = open(".", O_RDONLY | O_DIRECTORY);
system_fd_set_cloexec(prev_fd);
if (fd >= 0)
if (fchdir(fd)) {}
return prev_fd;
}
static void
netifd_dir_pop(int prev_fd)
{
if (fchdir(prev_fd)) {}
close(prev_fd);
}
int netifd_open_subdir(const char *name)
{
int prev_dir;
int ret = -1;
prev_dir = netifd_dir_push(-1);
if (chdir(main_path)) {
perror("chdir(main path)");
goto out;
}
ret = open(name, O_RDONLY | O_DIRECTORY);
if (ret >= 0)
system_fd_set_cloexec(ret);
out:
netifd_dir_pop(prev_dir);
return ret;
}
static void
netifd_init_script_handler(const char *script, json_object *obj, script_dump_cb cb)
{
json_object *tmp;
const char *name;
if (!json_check_type(obj, json_type_object))
return;
tmp = json_get_field(obj, "name", json_type_string);
if (!tmp)
return;
name = json_object_get_string(tmp);
cb(script, name, obj);
}
static void
netifd_parse_script_handler(const char *name, script_dump_cb cb)
{
struct json_tokener *tok = NULL;
json_object *obj;
static char buf[512];
char *start, *cmd;
FILE *f;
int len;
#define DUMP_SUFFIX " '' dump"
cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
sprintf(cmd, "%s" DUMP_SUFFIX, name);
f = popen(cmd, "r");
if (!f)
return;
do {
start = fgets(buf, sizeof(buf), f);
if (!start)
continue;
len = strlen(start);
if (!tok)
tok = json_tokener_new();
obj = json_tokener_parse_ex(tok, start, len);
if (obj) {
netifd_init_script_handler(name, obj, cb);
json_object_put(obj);
json_tokener_free(tok);
tok = NULL;
} else if (start[len - 1] == '\n') {
json_tokener_free(tok);
tok = NULL;
}
} while (!feof(f) && !ferror(f));
if (tok)
json_tokener_free(tok);
pclose(f);
}
void netifd_init_script_handlers(int dir_fd, script_dump_cb cb)
{
glob_t g;
int i, prev_fd;
prev_fd = netifd_dir_push(dir_fd);
if (glob("./*.sh", 0, NULL, &g))
return;
for (i = 0; i < g.gl_pathc; i++)
netifd_parse_script_handler(g.gl_pathv[i], cb);
netifd_dir_pop(prev_fd);
globfree(&g);
}
char *
netifd_handler_parse_config(struct uci_blob_param_list *config, json_object *obj)
{
struct blobmsg_policy *attrs;
char *str_buf, *str_cur;
char const **validate;
int str_len = 0;
int i;
config->n_params = json_object_array_length(obj);
attrs = calloc(1, sizeof(*attrs) * config->n_params);
if (!attrs)
return NULL;
validate = calloc(1, sizeof(char*) * config->n_params);
if (!validate)
goto error;
config->params = attrs;
config->validate = validate;
for (i = 0; i < config->n_params; i++) {
json_object *cur, *name, *type;
cur = json_check_type(json_object_array_get_idx(obj, i), json_type_array);
if (!cur)
goto error;
name = json_check_type(json_object_array_get_idx(cur, 0), json_type_string);
if (!name)
goto error;
type = json_check_type(json_object_array_get_idx(cur, 1), json_type_int);
if (!type)
goto error;
attrs[i].name = json_object_get_string(name);
attrs[i].type = json_object_get_int(type);
if (attrs[i].type > BLOBMSG_TYPE_LAST)
goto error;
str_len += strlen(attrs[i].name) + 1;
}
str_buf = malloc(str_len);
if (!str_buf)
goto error;
str_cur = str_buf;
for (i = 0; i < config->n_params; i++) {
const char *name = attrs[i].name;
char *delim;
attrs[i].name = str_cur;
str_cur += sprintf(str_cur, "%s", name) + 1;
delim = strchr(attrs[i].name, ':');
if (delim) {
*delim = '\0';
validate[i] = ++delim;
} else {
validate[i] = NULL;
}
}
return str_buf;
error:
free(attrs);
if (validate)
free(validate);
config->n_params = 0;
return NULL;
}
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