diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-11-27 23:26:56 +0100 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-12-09 14:50:53 +0100 |
commit | 5573d0146c1ae71ac5b3e4ba6a12c00585646a1a (patch) | |
tree | d6e4938b3a51d5973b7ac6c1a21f2705f5ad10c1 /src/obj/quota.c | |
parent | 85894febe35d223c0478dfac56dcd7366609f981 (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.c | 205 |
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 "a->bytes; + case NFTNL_OBJ_QUOTA_CONSUMED: + *data_len = sizeof(quota->consumed); + return "a->consumed; + case NFTNL_OBJ_QUOTA_FLAGS: + *data_len = sizeof(quota->flags); + return "a->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, +}; 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