libnftnl  1.2.9
obj/quota.c
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * (C) 2012-2016 by Pablo Neira Ayuso <pablo@netfilter.org>
4  */
5 
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <arpa/inet.h>
9 #include <errno.h>
10 #include <inttypes.h>
11 
12 #include <linux/netfilter/nf_tables.h>
13 
14 #include "internal.h"
15 #include <libmnl/libmnl.h>
16 #include <libnftnl/object.h>
17 
18 #include "obj.h"
19 
20 static int nftnl_obj_quota_set(struct nftnl_obj *e, uint16_t type,
21  const void *data, uint32_t data_len)
22 {
23  struct nftnl_obj_quota *quota = nftnl_obj_data(e);
24 
25  switch (type) {
26  case NFTNL_OBJ_QUOTA_BYTES:
27  memcpy(&quota->bytes, data, data_len);
28  break;
29  case NFTNL_OBJ_QUOTA_CONSUMED:
30  memcpy(&quota->consumed, data, data_len);
31  break;
32  case NFTNL_OBJ_QUOTA_FLAGS:
33  memcpy(&quota->flags, data, data_len);
34  break;
35  }
36  return 0;
37 }
38 
39 static const void *nftnl_obj_quota_get(const struct nftnl_obj *e,
40  uint16_t type, uint32_t *data_len)
41 {
42  struct nftnl_obj_quota *quota = nftnl_obj_data(e);
43 
44  switch (type) {
45  case NFTNL_OBJ_QUOTA_BYTES:
46  *data_len = sizeof(quota->bytes);
47  return &quota->bytes;
48  case NFTNL_OBJ_QUOTA_CONSUMED:
49  *data_len = sizeof(quota->consumed);
50  return &quota->consumed;
51  case NFTNL_OBJ_QUOTA_FLAGS:
52  *data_len = sizeof(quota->flags);
53  return &quota->flags;
54  }
55  return NULL;
56 }
57 
58 static int nftnl_obj_quota_cb(const struct nlattr *attr, void *data)
59 {
60  int type = mnl_attr_get_type(attr);
61  const struct nlattr **tb = data;
62 
63  if (mnl_attr_type_valid(attr, NFTA_QUOTA_MAX) < 0)
64  return MNL_CB_OK;
65 
66  switch(type) {
67  case NFTA_QUOTA_BYTES:
68  case NFTA_QUOTA_CONSUMED:
69  if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
70  abi_breakage();
71  break;
72  case NFTA_QUOTA_FLAGS:
73  if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
74  abi_breakage();
75  break;
76  }
77 
78  tb[type] = attr;
79  return MNL_CB_OK;
80 }
81 
82 static void
83 nftnl_obj_quota_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
84 {
85  struct nftnl_obj_quota *quota = nftnl_obj_data(e);
86 
87  if (e->flags & (1 << NFTNL_OBJ_QUOTA_BYTES))
88  mnl_attr_put_u64(nlh, NFTA_QUOTA_BYTES, htobe64(quota->bytes));
89  if (e->flags & (1 << NFTNL_OBJ_QUOTA_CONSUMED))
90  mnl_attr_put_u64(nlh, NFTA_QUOTA_CONSUMED,
91  htobe64(quota->consumed));
92  if (e->flags & (1 << NFTNL_OBJ_QUOTA_FLAGS))
93  mnl_attr_put_u32(nlh, NFTA_QUOTA_FLAGS, htonl(quota->flags));
94 }
95 
96 static int
97 nftnl_obj_quota_parse(struct nftnl_obj *e, struct nlattr *attr)
98 {
99  struct nftnl_obj_quota *quota = nftnl_obj_data(e);
100  struct nlattr *tb[NFTA_QUOTA_MAX + 1] = {};
101 
102  if (mnl_attr_parse_nested(attr, nftnl_obj_quota_cb, tb) < 0)
103  return -1;
104 
105  if (tb[NFTA_QUOTA_BYTES]) {
106  quota->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_BYTES]));
107  e->flags |= (1 << NFTNL_OBJ_QUOTA_BYTES);
108  }
109  if (tb[NFTA_QUOTA_CONSUMED]) {
110  quota->consumed =
111  be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_CONSUMED]));
112  e->flags |= (1 << NFTNL_OBJ_QUOTA_CONSUMED);
113  }
114  if (tb[NFTA_QUOTA_FLAGS]) {
115  quota->flags = ntohl(mnl_attr_get_u32(tb[NFTA_QUOTA_FLAGS]));
116  e->flags |= (1 << NFTNL_OBJ_QUOTA_FLAGS);
117  }
118 
119  return 0;
120 }
121 
122 static int nftnl_obj_quota_snprintf(char *buf, size_t len,
123  uint32_t flags,
124  const struct nftnl_obj *e)
125 {
126  struct nftnl_obj_quota *quota = nftnl_obj_data(e);
127 
128  return snprintf(buf, len, "bytes %"PRIu64" flags %u ",
129  quota->bytes, quota->flags);
130 }
131 
132 static struct attr_policy obj_quota_attr_policy[__NFTNL_OBJ_QUOTA_MAX] = {
133  [NFTNL_OBJ_QUOTA_BYTES] = { .maxlen = sizeof(uint64_t) },
134  [NFTNL_OBJ_QUOTA_CONSUMED] = { .maxlen = sizeof(uint64_t) },
135  [NFTNL_OBJ_QUOTA_FLAGS] = { .maxlen = sizeof(uint32_t) },
136 };
137 
138 struct obj_ops obj_ops_quota = {
139  .name = "quota",
140  .type = NFT_OBJECT_QUOTA,
141  .alloc_len = sizeof(struct nftnl_obj_quota),
142  .nftnl_max_attr = __NFTNL_OBJ_QUOTA_MAX - 1,
143  .attr_policy = obj_quota_attr_policy,
144  .set = nftnl_obj_quota_set,
145  .get = nftnl_obj_quota_get,
146  .parse = nftnl_obj_quota_parse,
147  .build = nftnl_obj_quota_build,
148  .output = nftnl_obj_quota_snprintf,
149 };