diff options
Diffstat (limited to 'src/obj/counter.c')
| -rw-r--r-- | src/obj/counter.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/obj/counter.c b/src/obj/counter.c new file mode 100644 index 0000000..beadc93 --- /dev/null +++ b/src/obj/counter.c @@ -0,0 +1,184 @@ +/* + * (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 <libmnl/libmnl.h> +#include <libnftnl/object.h> + +#include "internal.h" +#include "obj.h" + +static int +nftnl_obj_counter_set(struct nftnl_obj *e, uint16_t type, + const void *data, uint32_t data_len) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + + switch(type) { + case NFTNL_OBJ_CTR_BYTES: + ctr->bytes = *((uint64_t *)data); + break; + case NFTNL_OBJ_CTR_PKTS: + ctr->pkts = *((uint64_t *)data); + break; + default: + return -1; + } + return 0; +} + +static const void * +nftnl_obj_counter_get(const struct nftnl_obj *e, uint16_t type, + uint32_t *data_len) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + + switch(type) { + case NFTNL_OBJ_CTR_BYTES: + *data_len = sizeof(ctr->bytes); + return &ctr->bytes; + case NFTNL_OBJ_CTR_PKTS: + *data_len = sizeof(ctr->pkts); + return &ctr->pkts; + } + return NULL; +} + +static int nftnl_obj_counter_cb(const struct nlattr *attr, void *data) +{ + const struct nlattr **tb = data; + int type = mnl_attr_get_type(attr); + + if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0) + return MNL_CB_OK; + + switch(type) { + case NFTA_COUNTER_BYTES: + case NFTA_COUNTER_PACKETS: + if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0) + abi_breakage(); + break; + } + + tb[type] = attr; + return MNL_CB_OK; +} + +static void +nftnl_obj_counter_build(struct nlmsghdr *nlh, const struct nftnl_obj *e) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + + if (e->flags & (1 << NFTNL_OBJ_CTR_BYTES)) + mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, htobe64(ctr->bytes)); + if (e->flags & (1 << NFTNL_OBJ_CTR_PKTS)) + mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, htobe64(ctr->pkts)); +} + +static int +nftnl_obj_counter_parse(struct nftnl_obj *e, struct nlattr *attr) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + struct nlattr *tb[NFTA_COUNTER_MAX+1] = {}; + + if (mnl_attr_parse_nested(attr, nftnl_obj_counter_cb, tb) < 0) + return -1; + + if (tb[NFTA_COUNTER_BYTES]) { + ctr->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES])); + e->flags |= (1 << NFTNL_OBJ_CTR_BYTES); + } + if (tb[NFTA_COUNTER_PACKETS]) { + ctr->pkts = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS])); + e->flags |= (1 << NFTNL_OBJ_CTR_PKTS); + } + + return 0; +} + +static int +nftnl_obj_counter_json_parse(struct nftnl_obj *e, json_t *root, + struct nftnl_parse_err *err) +{ +#ifdef JSON_PARSING + uint64_t uval64; + + if (nftnl_jansson_parse_val(root, "pkts", NFTNL_TYPE_U64, &uval64, + err) == 0) + nftnl_obj_set_u64(e, NFTNL_OBJ_CTR_PKTS, uval64); + + if (nftnl_jansson_parse_val(root, "bytes", NFTNL_TYPE_U64, &uval64, + err) == 0) + nftnl_obj_set_u64(e, NFTNL_OBJ_CTR_BYTES, uval64); + + return 0; +#else + errno = EOPNOTSUPP; + return -1; +#endif +} + +static int nftnl_obj_counter_export(char *buf, size_t size, + const struct nftnl_obj *e, int type) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + NFTNL_BUF_INIT(b, buf, size); + + if (e->flags & (1 << NFTNL_OBJ_CTR_PKTS)) + nftnl_buf_u64(&b, type, ctr->pkts, PKTS); + if (e->flags & (1 << NFTNL_OBJ_CTR_BYTES)) + nftnl_buf_u64(&b, type, ctr->bytes, BYTES); + + return nftnl_buf_done(&b); +} + +static int nftnl_obj_counter_snprintf_default(char *buf, size_t len, + const struct nftnl_obj *e) +{ + struct nftnl_obj_counter *ctr = nftnl_obj_data(e); + + return snprintf(buf, len, "pkts %"PRIu64" bytes %"PRIu64" ", + ctr->pkts, ctr->bytes); +} + +static int nftnl_obj_counter_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_counter_snprintf_default(buf, len, e); + case NFTNL_OUTPUT_XML: + case NFTNL_OUTPUT_JSON: + return nftnl_obj_counter_export(buf, len, e, type); + default: + break; + } + return -1; +} + +struct obj_ops obj_ops_counter = { + .name = "counter", + .type = NFT_OBJECT_COUNTER, + .alloc_len = sizeof(struct nftnl_obj_counter), + .max_attr = NFTA_COUNTER_MAX, + .set = nftnl_obj_counter_set, + .get = nftnl_obj_counter_get, + .parse = nftnl_obj_counter_parse, + .build = nftnl_obj_counter_build, + .snprintf = nftnl_obj_counter_snprintf, + .json_parse = nftnl_obj_counter_json_parse, +}; |