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authorPablo Neira Ayuso <pablo@netfilter.org>2016-11-27 23:26:56 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2016-12-09 14:50:53 +0100
commit5573d0146c1ae71ac5b3e4ba6a12c00585646a1a (patch)
treed6e4938b3a51d5973b7ac6c1a21f2705f5ad10c1 /src/obj/quota.c
parent85894febe35d223c0478dfac56dcd7366609f981 (diff)
src: support for stateful objects
This patch allows you to add, to delete and to get stateful objects, this support two object types: counter and quota. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/obj/quota.c')
-rw-r--r--src/obj/quota.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/src/obj/quota.c b/src/obj/quota.c
new file mode 100644
index 0000000..d5757b2
--- /dev/null
+++ b/src/obj/quota.c
@@ -0,0 +1,205 @@
+/*
+ * (C) 2012-2016 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include <linux/netfilter/nf_tables.h>
+
+#include "internal.h"
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+
+#include "obj.h"
+
+static int nftnl_obj_quota_set(struct nftnl_obj *e, uint16_t type,
+ const void *data, uint32_t data_len)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+
+ switch (type) {
+ case NFTNL_OBJ_QUOTA_BYTES:
+ quota->bytes = *((uint64_t *)data);
+ break;
+ case NFTNL_OBJ_QUOTA_CONSUMED:
+ quota->consumed = *((uint64_t *)data);
+ break;
+ case NFTNL_OBJ_QUOTA_FLAGS:
+ quota->flags = *((uint32_t *)data);
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+static const void *nftnl_obj_quota_get(const struct nftnl_obj *e,
+ uint16_t type, uint32_t *data_len)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+
+ switch (type) {
+ case NFTNL_OBJ_QUOTA_BYTES:
+ *data_len = sizeof(quota->bytes);
+ return &quota->bytes;
+ case NFTNL_OBJ_QUOTA_CONSUMED:
+ *data_len = sizeof(quota->consumed);
+ return &quota->consumed;
+ case NFTNL_OBJ_QUOTA_FLAGS:
+ *data_len = sizeof(quota->flags);
+ return &quota->flags;
+ }
+ return NULL;
+}
+
+static int nftnl_obj_quota_cb(const struct nlattr *attr, void *data)
+{
+ int type = mnl_attr_get_type(attr);
+ const struct nlattr **tb = data;
+
+ if (mnl_attr_type_valid(attr, NFTA_QUOTA_MAX) < 0)
+ return MNL_CB_OK;
+
+ switch(type) {
+ case NFTA_QUOTA_BYTES:
+ case NFTA_QUOTA_CONSUMED:
+ if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
+ abi_breakage();
+ break;
+ case NFTA_QUOTA_FLAGS:
+ if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
+ abi_breakage();
+ break;
+ }
+
+ tb[type] = attr;
+ return MNL_CB_OK;
+}
+
+static void
+nftnl_obj_quota_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_BYTES))
+ mnl_attr_put_u64(nlh, NFTA_QUOTA_BYTES, htobe64(quota->bytes));
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_CONSUMED))
+ mnl_attr_put_u64(nlh, NFTA_QUOTA_CONSUMED,
+ htobe64(quota->consumed));
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_FLAGS))
+ mnl_attr_put_u32(nlh, NFTA_QUOTA_FLAGS, htonl(quota->flags));
+}
+
+static int
+nftnl_obj_quota_parse(struct nftnl_obj *e, struct nlattr *attr)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+ struct nlattr *tb[NFTA_QUOTA_MAX + 1] = {};
+
+ if (mnl_attr_parse_nested(attr, nftnl_obj_quota_cb, tb) < 0)
+ return -1;
+
+ if (tb[NFTA_QUOTA_BYTES]) {
+ quota->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_BYTES]));
+ e->flags |= (1 << NFTNL_OBJ_QUOTA_BYTES);
+ }
+ if (tb[NFTA_QUOTA_CONSUMED]) {
+ quota->consumed =
+ be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_CONSUMED]));
+ e->flags |= (1 << NFTNL_OBJ_QUOTA_CONSUMED);
+ }
+ if (tb[NFTA_QUOTA_FLAGS]) {
+ quota->flags = ntohl(mnl_attr_get_u32(tb[NFTA_QUOTA_FLAGS]));
+ e->flags |= (1 << NFTNL_OBJ_QUOTA_FLAGS);
+ }
+
+ return 0;
+}
+
+static int
+nftnl_obj_quota_json_parse(struct nftnl_obj *e, json_t *root,
+ struct nftnl_parse_err *err)
+{
+#ifdef JSON_PARSING
+ uint64_t bytes;
+ uint32_t flags;
+
+ if (nftnl_jansson_parse_val(root, "bytes", NFTNL_TYPE_U64, &bytes,
+ err) == 0)
+ nftnl_obj_set_u64(e, NFTNL_OBJ_QUOTA_BYTES, bytes);
+ if (nftnl_jansson_parse_val(root, "consumed", NFTNL_TYPE_U64, &bytes,
+ err) == 0)
+ nftnl_obj_set_u64(e, NFTNL_OBJ_QUOTA_CONSUMED, bytes);
+ if (nftnl_jansson_parse_val(root, "flags", NFTNL_TYPE_U32, &flags,
+ err) == 0)
+ nftnl_obj_set_u32(e, NFTNL_OBJ_QUOTA_FLAGS, flags);
+
+ return 0;
+#else
+ errno = EOPNOTSUPP;
+ return -1;
+#endif
+}
+
+static int nftnl_obj_quota_export(char *buf, size_t size,
+ const struct nftnl_obj *e, int type)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+ NFTNL_BUF_INIT(b, buf, size);
+
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_BYTES))
+ nftnl_buf_u64(&b, type, quota->bytes, BYTES);
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_CONSUMED))
+ nftnl_buf_u64(&b, type, quota->consumed, CONSUMED);
+ if (e->flags & (1 << NFTNL_OBJ_QUOTA_FLAGS))
+ nftnl_buf_u32(&b, type, quota->flags, FLAGS);
+
+ return nftnl_buf_done(&b);
+}
+
+static int nftnl_obj_quota_snprintf_default(char *buf, size_t len,
+ const struct nftnl_obj *e)
+{
+ struct nftnl_obj_quota *quota = nftnl_obj_data(e);
+
+ return snprintf(buf, len, "bytes %"PRIu64" flags %u ",
+ quota->bytes, quota->flags);
+}
+
+static int nftnl_obj_quota_snprintf(char *buf, size_t len, uint32_t type,
+ uint32_t flags,
+ const struct nftnl_obj *e)
+{
+ switch (type) {
+ case NFTNL_OUTPUT_DEFAULT:
+ return nftnl_obj_quota_snprintf_default(buf, len, e);
+ case NFTNL_OUTPUT_XML:
+ case NFTNL_OUTPUT_JSON:
+ return nftnl_obj_quota_export(buf, len, e, type);
+ default:
+ break;
+ }
+ return -1;
+}
+
+struct obj_ops obj_ops_quota = {
+ .name = "quota",
+ .type = NFT_OBJECT_QUOTA,
+ .alloc_len = sizeof(struct nftnl_obj_quota),
+ .max_attr = NFTA_QUOTA_MAX,
+ .set = nftnl_obj_quota_set,
+ .get = nftnl_obj_quota_get,
+ .parse = nftnl_obj_quota_parse,
+ .build = nftnl_obj_quota_build,
+ .snprintf = nftnl_obj_quota_snprintf,
+ .json_parse = nftnl_obj_quota_json_parse,
+};