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174 lines
4.2 KiB
174 lines
4.2 KiB
/*
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* Copyright (C) 2017 jianhui zhao <jianhuizhao329@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/uaccess.h>
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#include <linux/inetdevice.h>
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#include <linux/seq_file.h>
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#include "config.h"
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static struct proc_dir_entry *proc;
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static struct config conf;
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static int update_gw_interface(const char *interface)
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{
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int ret = 0;
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struct net_device *dev;
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struct in_device *in_dev;
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dev = dev_get_by_name(&init_net, interface);
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if (!dev) {
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pr_err("Not found interface: %s\n", interface);
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return -ENOENT;
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}
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conf.interface_ifindex = dev->ifindex;
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in_dev = inetdev_by_index(dev_net(dev), conf.interface_ifindex);
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if (!in_dev) {
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pr_err("Not found in_dev on %s\n", interface);
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ret = -ENOENT;
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goto QUIT;
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}
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for_primary_ifa(in_dev) {
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conf.interface_ipaddr = ifa->ifa_local;
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conf.interface_mask = ifa->ifa_mask;
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conf.interface_broadcast = ifa->ifa_broadcast;
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pr_info("Found ip from %s: %pI4\n", interface, &conf.interface_ipaddr);
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break;
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} endfor_ifa(in_dev)
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QUIT:
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dev_put(dev);
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return ret;
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}
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static int proc_config_show(struct seq_file *s, void *v)
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{
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seq_printf(s, "enabled(RW) = %d\n", conf.enabled);
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seq_printf(s, "interface(RW) = %s\n", conf.interface);
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seq_printf(s, "ipaddr(RO) = %pI4\n", &conf.interface_ipaddr);
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seq_printf(s, "netmask(RO) = %pI4\n", &conf.interface_mask);
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seq_printf(s, "broadcast(RO) = %pI4\n", &conf.interface_broadcast);
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seq_printf(s, "port(RW) = %d\n", conf.port);
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seq_printf(s, "ssl_port(RW) = %d\n", conf.ssl_port);
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return 0;
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}
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static ssize_t proc_config_write(struct file *file, const char __user *buf, size_t size, loff_t *ppos)
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{
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char data[128];
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char *delim, *key;
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const char *value;
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int update = 0;
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if (size == 0)
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return -EINVAL;
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if (size > sizeof(data))
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size = sizeof(data);
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if (copy_from_user(data, buf, size))
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return -EFAULT;
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data[size - 1] = 0;
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key = data;
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while (key && *key) {
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while (*key && (*key == ' '))
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key++;
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delim = strchr(key, '=');
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if (!delim)
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break;
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*delim++ = 0;
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value = delim;
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delim = strchr(value, '\n');
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if (delim)
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*delim++ = 0;
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if (!strcmp(key, "enabled")) {
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conf.enabled = simple_strtol(value, NULL, 0);
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if (conf.enabled)
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update = 1;
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pr_info("wifidog %s\n", conf.enabled ? "enabled" : "disabled");
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} else if (!strcmp(key, "interface")) {
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strncpy(conf.interface, value, sizeof(conf.interface) - 1);
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update = 1;
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} else if (!strcmp(key, "port")) {
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conf.port = simple_strtol(value, NULL, 0);
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} else if (!strcmp(key, "ssl_port")) {
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conf.ssl_port = simple_strtol(value, NULL, 0);
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}
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key = delim;
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}
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if (update)
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update_gw_interface(conf.interface);
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return size;
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}
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static int proc_config_open(struct inode *inode, struct file *file)
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{
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return single_open(file, proc_config_show, NULL);
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}
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const static struct file_operations proc_config_ops = {
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.owner = THIS_MODULE,
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.open = proc_config_open,
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.read = seq_read,
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.write = proc_config_write,
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.llseek = seq_lseek,
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.release = single_release
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};
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int init_config(void)
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{
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int ret = 0;
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conf.interface_ifindex= -1;
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conf.port = 2060;
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conf.ssl_port = 8443;
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strcpy(conf.interface, "br-lan");
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proc = proc_mkdir(PROC_DIR_NAME, NULL);
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if (!proc) {
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pr_err("can't create dir /proc/"PROC_DIR_NAME"/\n");
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return -ENODEV;;
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}
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if (!proc_create("config", 0644, proc, &proc_config_ops)) {
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pr_err("can't create file /proc/"PROC_DIR_NAME"/config\n");
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ret = -EINVAL;
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goto remove;
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}
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return 0;
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remove:
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remove_proc_entry(PROC_DIR_NAME, NULL);
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return ret;
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}
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void deinit_config(void)
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{
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remove_proc_entry("config", proc);
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remove_proc_entry(PROC_DIR_NAME, NULL);
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}
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struct config *get_config(void)
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{
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return &conf;
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}
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