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_for_each_element_safe(tree, element, node_member, ptr) \
  46         avl_for_each_element_safe(&(tree)->avl, element, node_member.avl, ptr)
  47
  48 #define vlist_simple_init(tree, node, member) \
  49         __vlist_simple_init(tree, offsetof(node, member))
  50
  51 void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
  52 void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
  53 void vlist_simple_flush(struct vlist_simple_tree *tree);
  54 void vlist_simple_flush_all(struct vlist_simple_tree *tree);
  55 void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
  56
  57 static inline void vlist_simple_update(struct vlist_simple_tree *tree)
  58 {
  59         tree->version++;
  60 }
  61
  62 static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
  63 {
  64         node->version = tree->version;
  65         list_add(&node->list, &tree->list);
  66 }
  67
  68 #define vlist_simple_for_each_element(tree, element, node_member) \
  69         list_for_each_entry(element, &(tree)->list, node_member.list)
  70
  71 #define vlist_simple_empty(tree) \
  72         list_empty(&(tree)->list)
  73
  74
  75 #ifdef __linux__
  76 static inline int fls(int x)
  77 {
  78     int r = 32;
  79
  80     if (!x)
  81         return 0;
  82     if (!(x & 0xffff0000u)) {
  83         x <<= 16;
  84         r -= 16;
  85     }
  86     if (!(x & 0xff000000u)) {
  87         x <<= 8;
  88         r -= 8;
  89     }
  90     if (!(x & 0xf0000000u)) {
  91         x <<= 4;
  92         r -= 4;
  93     }
  94     if (!(x & 0xc0000000u)) {
  95         x <<= 2;
  96         r -= 2;
  97     }
  98     if (!(x & 0x80000000u)) {
  99         x <<= 1;
 100         r -= 1;
 101     }
 102     return r;
 103 }
 104 #endif
 105
 106 unsigned int parse_netmask_string(const char *str, bool v6);
 107 bool split_netmask(char *str, unsigned int *netmask, bool v6);
 108 int parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask);
 109
 110 char * format_macaddr(uint8_t *mac);
 111
 112 #ifdef __APPLE__
 113 #define s6_addr32       __u6_addr.__u6_addr32
 114 #endif
 115
 116 #endif