package/libnl-tiny/src/genl_family.c

   1 /*
   2  * lib/genl/family.c            Generic Netlink Family
   3  *
   4  *      This library is free software; you can redistribute it and/or
   5  *      modify it under the terms of the GNU Lesser General Public
   6  *      License as published by the Free Software Foundation version 2.1
   7  *      of the License.
   8  *
   9  * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
  10  */
  11
  12 /**
  13  * @ingroup genl
  14  * @defgroup genl_family Generic Netlink Family
  15  * @brief
  16  *
  17  * @{
  18  */
  19
  20 #include <netlink-generic.h>
  21 #include <netlink/netlink.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/utils.h>
  25
  26 struct nl_object_ops genl_family_ops;
  27 /** @endcond */
  28
  29 static void family_constructor(struct nl_object *c)
  30 {
  31         struct genl_family *family = (struct genl_family *) c;
  32
  33         nl_init_list_head(&family->gf_ops);
  34 }
  35
  36 static void family_free_data(struct nl_object *c)
  37 {
  38         struct genl_family *family = (struct genl_family *) c;
  39         struct genl_family_op *ops, *tmp;
  40
  41         if (family == NULL)
  42                 return;
  43
  44         nl_list_for_each_entry_safe(ops, tmp, &family->gf_ops, o_list) {
  45                 nl_list_del(&ops->o_list);
  46                 free(ops);
  47         }
  48 }
  49
  50 static int family_clone(struct nl_object *_dst, struct nl_object *_src)
  51 {
  52         struct genl_family *dst = nl_object_priv(_dst);
  53         struct genl_family *src = nl_object_priv(_src);
  54         struct genl_family_op *ops;
  55         int err;
  56
  57         nl_list_for_each_entry(ops, &src->gf_ops, o_list) {
  58                 err = genl_family_add_op(dst, ops->o_id, ops->o_flags);
  59                 if (err < 0)
  60                         return err;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static int family_compare(struct nl_object *_a, struct nl_object *_b,
  67                           uint32_t attrs, int flags)
  68 {
  69         struct genl_family *a = (struct genl_family *) _a;
  70         struct genl_family *b = (struct genl_family *) _b;
  71         int diff = 0;
  72
  73 #define FAM_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, FAMILY_ATTR_##ATTR, a, b, EXPR)
  74
  75         diff |= FAM_DIFF(ID,            a->gf_id != b->gf_id);
  76         diff |= FAM_DIFF(VERSION,       a->gf_version != b->gf_version);
  77         diff |= FAM_DIFF(HDRSIZE,       a->gf_hdrsize != b->gf_hdrsize);
  78         diff |= FAM_DIFF(MAXATTR,       a->gf_maxattr != b->gf_maxattr);
  79         diff |= FAM_DIFF(NAME,          strcmp(a->gf_name, b->gf_name));
  80
  81 #undef FAM_DIFF
  82
  83         return diff;
  84 }
  85
  86
  87 /**
  88  * @name Family Object
  89  * @{
  90  */
  91
  92 struct genl_family *genl_family_alloc(void)
  93 {
  94         return (struct genl_family *) nl_object_alloc(&genl_family_ops);
  95 }
  96
  97 void genl_family_put(struct genl_family *family)
  98 {
  99         nl_object_put((struct nl_object *) family);
 100 }
 101
 102 /** @} */
 103
 104
 105 int genl_family_add_op(struct genl_family *family, int id, int flags)
 106 {
 107         struct genl_family_op *op;
 108
 109         op = calloc(1, sizeof(*op));
 110         if (op == NULL)
 111                 return -NLE_NOMEM;
 112
 113         op->o_id = id;
 114         op->o_flags = flags;
 115
 116         nl_list_add_tail(&op->o_list, &family->gf_ops);
 117         family->ce_mask |= FAMILY_ATTR_OPS;
 118
 119         return 0;
 120 }
 121
 122 /** @} */
 123
 124 /** @cond SKIP */
 125 struct nl_object_ops genl_family_ops = {
 126         .oo_name                = "genl/family",
 127         .oo_size                = sizeof(struct genl_family),
 128         .oo_constructor         = family_constructor,
 129         .oo_free_data           = family_free_data,
 130         .oo_clone               = family_clone,
 131         .oo_compare             = family_compare,
 132         .oo_id_attrs            = FAMILY_ATTR_ID,
 133 };
 134 /** @endcond */
 135
 136 /** @} */