libnftnl 1.2.6
obj/quota.c
1/*
2 * (C) 2012-2016 by Pablo Neira Ayuso <pablo@netfilter.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published
6 * by the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <stdio.h>
11#include <stdint.h>
12#include <arpa/inet.h>
13#include <errno.h>
14#include <inttypes.h>
15
16#include <linux/netfilter/nf_tables.h>
17
18#include "internal.h"
19#include <libmnl/libmnl.h>
20#include <libnftnl/object.h>
21
22#include "obj.h"
23
24static int nftnl_obj_quota_set(struct nftnl_obj *e, uint16_t type,
25 const void *data, uint32_t data_len)
26{
27 struct nftnl_obj_quota *quota = nftnl_obj_data(e);
28
29 switch (type) {
30 case NFTNL_OBJ_QUOTA_BYTES:
31 memcpy(&quota->bytes, data, sizeof(quota->bytes));
32 break;
33 case NFTNL_OBJ_QUOTA_CONSUMED:
34 memcpy(&quota->consumed, data, sizeof(quota->consumed));
35 break;
36 case NFTNL_OBJ_QUOTA_FLAGS:
37 memcpy(&quota->flags, data, sizeof(quota->flags));
38 break;
39 default:
40 return -1;
41 }
42 return 0;
43}
44
45static const void *nftnl_obj_quota_get(const struct nftnl_obj *e,
46 uint16_t type, uint32_t *data_len)
47{
48 struct nftnl_obj_quota *quota = nftnl_obj_data(e);
49
50 switch (type) {
51 case NFTNL_OBJ_QUOTA_BYTES:
52 *data_len = sizeof(quota->bytes);
53 return &quota->bytes;
54 case NFTNL_OBJ_QUOTA_CONSUMED:
55 *data_len = sizeof(quota->consumed);
56 return &quota->consumed;
57 case NFTNL_OBJ_QUOTA_FLAGS:
58 *data_len = sizeof(quota->flags);
59 return &quota->flags;
60 }
61 return NULL;
62}
63
64static int nftnl_obj_quota_cb(const struct nlattr *attr, void *data)
65{
66 int type = mnl_attr_get_type(attr);
67 const struct nlattr **tb = data;
68
69 if (mnl_attr_type_valid(attr, NFTA_QUOTA_MAX) < 0)
70 return MNL_CB_OK;
71
72 switch(type) {
73 case NFTA_QUOTA_BYTES:
74 case NFTA_QUOTA_CONSUMED:
75 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
76 abi_breakage();
77 break;
78 case NFTA_QUOTA_FLAGS:
79 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
80 abi_breakage();
81 break;
82 }
83
84 tb[type] = attr;
85 return MNL_CB_OK;
86}
87
88static void
89nftnl_obj_quota_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
90{
91 struct nftnl_obj_quota *quota = nftnl_obj_data(e);
92
93 if (e->flags & (1 << NFTNL_OBJ_QUOTA_BYTES))
94 mnl_attr_put_u64(nlh, NFTA_QUOTA_BYTES, htobe64(quota->bytes));
95 if (e->flags & (1 << NFTNL_OBJ_QUOTA_CONSUMED))
96 mnl_attr_put_u64(nlh, NFTA_QUOTA_CONSUMED,
97 htobe64(quota->consumed));
98 if (e->flags & (1 << NFTNL_OBJ_QUOTA_FLAGS))
99 mnl_attr_put_u32(nlh, NFTA_QUOTA_FLAGS, htonl(quota->flags));
100}
101
102static int
103nftnl_obj_quota_parse(struct nftnl_obj *e, struct nlattr *attr)
104{
105 struct nftnl_obj_quota *quota = nftnl_obj_data(e);
106 struct nlattr *tb[NFTA_QUOTA_MAX + 1] = {};
107
108 if (mnl_attr_parse_nested(attr, nftnl_obj_quota_cb, tb) < 0)
109 return -1;
110
111 if (tb[NFTA_QUOTA_BYTES]) {
112 quota->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_BYTES]));
113 e->flags |= (1 << NFTNL_OBJ_QUOTA_BYTES);
114 }
115 if (tb[NFTA_QUOTA_CONSUMED]) {
116 quota->consumed =
117 be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_CONSUMED]));
118 e->flags |= (1 << NFTNL_OBJ_QUOTA_CONSUMED);
119 }
120 if (tb[NFTA_QUOTA_FLAGS]) {
121 quota->flags = ntohl(mnl_attr_get_u32(tb[NFTA_QUOTA_FLAGS]));
122 e->flags |= (1 << NFTNL_OBJ_QUOTA_FLAGS);
123 }
124
125 return 0;
126}
127
128static int nftnl_obj_quota_snprintf(char *buf, size_t len,
129 uint32_t flags,
130 const struct nftnl_obj *e)
131{
132 struct nftnl_obj_quota *quota = nftnl_obj_data(e);
133
134 return snprintf(buf, len, "bytes %"PRIu64" flags %u ",
135 quota->bytes, quota->flags);
136}
137
138struct obj_ops obj_ops_quota = {
139 .name = "quota",
140 .type = NFT_OBJECT_QUOTA,
141 .alloc_len = sizeof(struct nftnl_obj_quota),
142 .max_attr = NFTA_QUOTA_MAX,
143 .set = nftnl_obj_quota_set,
144 .get = nftnl_obj_quota_get,
145 .parse = nftnl_obj_quota_parse,
146 .build = nftnl_obj_quota_build,
147 .output = nftnl_obj_quota_snprintf,
148};