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 <stdio.h>
  18 #include <libubox/list.h>
  19 #include <libubox/avl.h>
  20 #include <libubox/avl-cmp.h>
  21 #include <libubox/blobmsg.h>
  22 #include <libubox/vlist.h>
  23 #include <libubox/utils.h>
  24
  25 static inline bool blobmsg_get_bool_default(struct blob_attr *attr, bool val)
  26 {
  27         if (!attr)
  28                 return val;
  29
  30         return blobmsg_get_bool(attr);
  31 }
  32
  33 #define __init __attribute__((constructor))
  34
  35 struct vlist_simple_tree {
  36         struct list_head list;
  37         int head_offset;
  38         int version;
  39 };
  40
  41 struct vlist_simple_node {
  42         struct list_head list;
  43         int version;
  44 };
  45
  46 #define vlist_for_each_element_safe(tree, element, node_member, ptr) \
  47         avl_for_each_element_safe(&(tree)->avl, element, node_member.avl, ptr)
  48
  49 #define vlist_simple_init(tree, node, member) \
  50         __vlist_simple_init(tree, offsetof(node, member))
  51
  52 void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
  53 void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
  54 void vlist_simple_flush(struct vlist_simple_tree *tree);
  55 void vlist_simple_flush_all(struct vlist_simple_tree *tree);
  56 void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
  57
  58 static inline void vlist_simple_update(struct vlist_simple_tree *tree)
  59 {
  60         tree->version++;
  61 }
  62
  63 static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
  64 {
  65         node->version = tree->version;
  66         list_add(&node->list, &tree->list);
  67 }
  68
  69 #define vlist_simple_for_each_element(tree, element, node_member) \
  70         list_for_each_entry(element, &(tree)->list, node_member.list)
  71
  72 #define vlist_simple_empty(tree) \
  73         list_empty(&(tree)->list)
  74
  75
  76 #ifdef __linux__
  77 static inline int fls(int x)
  78 {
  79     int r = 32;
  80
  81     if (!x)
  82         return 0;
  83     if (!(x & 0xffff0000u)) {
  84         x <<= 16;
  85         r -= 16;
  86     }
  87     if (!(x & 0xff000000u)) {
  88         x <<= 8;
  89         r -= 8;
  90     }
  91     if (!(x & 0xf0000000u)) {
  92         x <<= 4;
  93         r -= 4;
  94     }
  95     if (!(x & 0xc0000000u)) {
  96         x <<= 2;
  97         r -= 2;
  98     }
  99     if (!(x & 0x80000000u)) {
 100         x <<= 1;
 101         r -= 1;
 102     }
 103     return r;
 104 }
 105 #endif
 106
 107 unsigned int parse_netmask_string(const char *str, bool v6);
 108 bool split_netmask(char *str, unsigned int *netmask, bool v6);
 109 int parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask);
 110
 111 char * format_macaddr(uint8_t *mac);
 112
 113 uint32_t crc32_file(FILE *fp);
 114
 115 #ifdef __APPLE__
 116 #define s6_addr32       __u6_addr.__u6_addr32
 117 #endif
 118
 119 #endif