utils.h

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #ifndef __NETIFD_UTILS_H
  15 #define __NETIFD_UTILS_H
  16
  17 #include <libubox/list.h>
  18 #include <libubox/avl.h>
  19 #include <libubox/avl-cmp.h>
  20 #include <libubox/blobmsg.h>
  21 #include <libubox/vlist.h>
  22 #include <libubox/utils.h>
  23
  24 static inline bool blobmsg_get_bool_default(struct blob_attr *attr, bool val)
  25 {
  26         if (!attr)
  27                 return val;
  28
  29         return blobmsg_get_bool(attr);
  30 }
  31
  32 #define __init __attribute__((constructor))
  33
  34 struct vlist_simple_tree {
  35         struct list_head list;
  36         int head_offset;
  37         int version;
  38 };
  39
  40 struct vlist_simple_node {
  41         struct list_head list;
  42         int version;
  43 };
  44
  45 #define vlist_simple_init(tree, node, member) \
  46         __vlist_simple_init(tree, offsetof(node, member))
  47
  48 void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
  49 void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
  50 void vlist_simple_flush(struct vlist_simple_tree *tree);
  51 void vlist_simple_flush_all(struct vlist_simple_tree *tree);
  52 void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
  53
  54 static inline void vlist_simple_update(struct vlist_simple_tree *tree)
  55 {
  56         tree->version++;
  57 }
  58
  59 static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
  60 {
  61         node->version = tree->version;
  62         list_add(&node->list, &tree->list);
  63 }
  64
  65 #define vlist_simple_for_each_element(tree, element, node_member) \
  66         list_for_each_entry(element, &(tree)->list, node_member.list)
  67
  68 #define vlist_simple_empty(tree) \
  69         list_empty(&(tree)->list)
  70
  71
  72 #ifdef __linux__
  73 static inline int fls(int x)
  74 {
  75     int r = 32;
  76
  77     if (!x)
  78         return 0;
  79     if (!(x & 0xffff0000u)) {
  80         x <<= 16;
  81         r -= 16;
  82     }
  83     if (!(x & 0xff000000u)) {
  84         x <<= 8;
  85         r -= 8;
  86     }
  87     if (!(x & 0xf0000000u)) {
  88         x <<= 4;
  89         r -= 4;
  90     }
  91     if (!(x & 0xc0000000u)) {
  92         x <<= 2;
  93         r -= 2;
  94     }
  95     if (!(x & 0x80000000u)) {
  96         x <<= 1;
  97         r -= 1;
  98     }
  99     return r;
 100 }
 101 #endif
 102
 103 unsigned int parse_netmask_string(const char *str, bool v6);
 104 bool split_netmask(char *str, unsigned int *netmask, bool v6);
 105 int parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask);
 106
 107 char * format_macaddr(uint8_t *mac);
 108
 109 #endif