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 <uci_blob.h>
  20 #include <libubox/list.h>
  21 #include <libubox/avl.h>
  22 #include <libubox/avl-cmp.h>
  23 #include <libubox/blobmsg.h>
  24 #include <libubox/vlist.h>
  25 #include <libubox/utils.h>
  26
  27 static inline bool blobmsg_get_bool_default(struct blob_attr *attr, bool val)
  28 {
  29         if (!attr)
  30                 return val;
  31
  32         return blobmsg_get_bool(attr);
  33 }
  34
  35 #define __init __attribute__((constructor))
  36
  37 struct vlist_simple_tree {
  38         struct list_head list;
  39         int head_offset;
  40         int version;
  41 };
  42
  43 struct vlist_simple_node {
  44         struct list_head list;
  45         int version;
  46 };
  47
  48 #define vlist_for_each_element_safe(tree, element, node_member, ptr) \
  49         avl_for_each_element_safe(&(tree)->avl, element, node_member.avl, ptr)
  50
  51 #define vlist_simple_init(tree, node, member) \
  52         __vlist_simple_init(tree, offsetof(node, member))
  53
  54 void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
  55 void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
  56 void vlist_simple_flush(struct vlist_simple_tree *tree);
  57 void vlist_simple_flush_all(struct vlist_simple_tree *tree);
  58 void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
  59
  60 static inline void vlist_simple_update(struct vlist_simple_tree *tree)
  61 {
  62         tree->version++;
  63 }
  64
  65 static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
  66 {
  67         node->version = tree->version;
  68         list_add_tail(&node->list, &tree->list);
  69 }
  70
  71 #define vlist_simple_for_each_element(tree, element, node_member) \
  72         list_for_each_entry(element, &(tree)->list, node_member.list)
  73
  74 #define vlist_simple_empty(tree) \
  75         list_empty(&(tree)->list)
  76
  77
  78 #ifdef __linux__
  79 static inline int fls(int x)
  80 {
  81     int r = 32;
  82
  83     if (!x)
  84         return 0;
  85     if (!(x & 0xffff0000u)) {
  86         x <<= 16;
  87         r -= 16;
  88     }
  89     if (!(x & 0xff000000u)) {
  90         x <<= 8;
  91         r -= 8;
  92     }
  93     if (!(x & 0xf0000000u)) {
  94         x <<= 4;
  95         r -= 4;
  96     }
  97     if (!(x & 0xc0000000u)) {
  98         x <<= 2;
  99         r -= 2;
 100     }
 101     if (!(x & 0x80000000u)) {
 102         //x <<= 1;
 103         r -= 1;
 104     }
 105     return r;
 106 }
 107 #endif
 108
 109 unsigned int parse_netmask_string(const char *str, bool v6);
 110 bool split_netmask(char *str, unsigned int *netmask, bool v6);
 111 int parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask);
 112 bool check_pid_path(int pid, const char *exe);
 113
 114 char * format_macaddr(uint8_t *mac);
 115
 116 uint32_t crc32_file(FILE *fp);
 117
 118 const char * uci_get_validate_string(const struct uci_blob_param_list *c, int i);
 119
 120 #ifdef __APPLE__
 121 #define s6_addr32       __u6_addr.__u6_addr32
 122 #endif
 123
 124 #endif