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 <unistd.h>
  18 #include <stdio.h>
  19 #include <libubox/list.h>
  20 #include <libubox/avl.h>
  21 #include <libubox/avl-cmp.h>
  22 #include <libubox/blobmsg.h>
  23 #include <libubox/vlist.h>
  24 #include <libubox/utils.h>
  25
  26 static inline bool blobmsg_get_bool_default(struct blob_attr *attr, bool val)
  27 {
  28         if (!attr)
  29                 return val;
  30
  31         return blobmsg_get_bool(attr);
  32 }
  33
  34 #define __init __attribute__((constructor))
  35
  36 struct vlist_simple_tree {
  37         struct list_head list;
  38         int head_offset;
  39         int version;
  40 };
  41
  42 struct vlist_simple_node {
  43         struct list_head list;
  44         int version;
  45 };
  46
  47 #define vlist_for_each_element_safe(tree, element, node_member, ptr) \
  48         avl_for_each_element_safe(&(tree)->avl, element, node_member.avl, ptr)
  49
  50 #define vlist_simple_init(tree, node, member) \
  51         __vlist_simple_init(tree, offsetof(node, member))
  52
  53 void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
  54 void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
  55 void vlist_simple_flush(struct vlist_simple_tree *tree);
  56 void vlist_simple_flush_all(struct vlist_simple_tree *tree);
  57 void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
  58
  59 static inline void vlist_simple_update(struct vlist_simple_tree *tree)
  60 {
  61         tree->version++;
  62 }
  63
  64 static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
  65 {
  66         node->version = tree->version;
  67         list_add_tail(&node->list, &tree->list);
  68 }
  69
  70 #define vlist_simple_for_each_element(tree, element, node_member) \
  71         list_for_each_entry(element, &(tree)->list, node_member.list)
  72
  73 #define vlist_simple_empty(tree) \
  74         list_empty(&(tree)->list)
  75
  76
  77 #ifdef __linux__
  78 static inline int fls(int x)
  79 {
  80     int r = 32;
  81
  82     if (!x)
  83         return 0;
  84     if (!(x & 0xffff0000u)) {
  85         x <<= 16;
  86         r -= 16;
  87     }
  88     if (!(x & 0xff000000u)) {
  89         x <<= 8;
  90         r -= 8;
  91     }
  92     if (!(x & 0xf0000000u)) {
  93         x <<= 4;
  94         r -= 4;
  95     }
  96     if (!(x & 0xc0000000u)) {
  97         x <<= 2;
  98         r -= 2;
  99     }
 100     if (!(x & 0x80000000u)) {
 101         x <<= 1;
 102         r -= 1;
 103     }
 104     return r;
 105 }
 106 #endif
 107
 108 unsigned int parse_netmask_string(const char *str, bool v6);
 109 bool split_netmask(char *str, unsigned int *netmask, bool v6);
 110 int parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask);
 111 bool check_pid_path(int pid, const char *exe);
 112
 113 char * format_macaddr(uint8_t *mac);
 114
 115 uint32_t crc32_file(FILE *fp);
 116
 117 #ifdef __APPLE__
 118 #define s6_addr32       __u6_addr.__u6_addr32
 119 #endif
 120
 121 #endif