diff options
Diffstat (limited to 'src/set.c')
| -rw-r--r-- | src/set.c | 1066 |
1 files changed, 1066 insertions, 0 deletions
diff --git a/src/set.c b/src/set.c new file mode 100644 index 0000000..c46f827 --- /dev/null +++ b/src/set.c @@ -0,0 +1,1066 @@ +/* + * (C) 2012-2013 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. + * + * This code has been sponsored by Sophos Astaro <http://www.sophos.com> + */ +#include "internal.h" + +#include <time.h> +#include <endian.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> +#include <netinet/in.h> +#include <limits.h> +#include <errno.h> + +#include <libmnl/libmnl.h> +#include <linux/netfilter/nfnetlink.h> +#include <linux/netfilter/nf_tables.h> + +#include <libnftnl/set.h> +#include <libnftnl/expr.h> + +EXPORT_SYMBOL(nftnl_set_alloc); +struct nftnl_set *nftnl_set_alloc(void) +{ + struct nftnl_set *s; + + s = calloc(1, sizeof(struct nftnl_set)); + if (s == NULL) + return NULL; + + INIT_LIST_HEAD(&s->element_list); + INIT_LIST_HEAD(&s->expr_list); + return s; +} + +EXPORT_SYMBOL(nftnl_set_free); +void nftnl_set_free(const struct nftnl_set *s) +{ + struct nftnl_set_elem *elem, *tmp; + struct nftnl_expr *expr, *next; + + if (s->flags & (1 << NFTNL_SET_TABLE)) + xfree(s->table); + if (s->flags & (1 << NFTNL_SET_NAME)) + xfree(s->name); + if (s->flags & (1 << NFTNL_SET_USERDATA)) + xfree(s->user.data); + + list_for_each_entry_safe(expr, next, &s->expr_list, head) + nftnl_expr_free(expr); + + list_for_each_entry_safe(elem, tmp, &s->element_list, head) { + list_del(&elem->head); + nftnl_set_elem_free(elem); + } + xfree(s); +} + +EXPORT_SYMBOL(nftnl_set_is_set); +bool nftnl_set_is_set(const struct nftnl_set *s, uint16_t attr) +{ + return s->flags & (1 << attr); +} + +EXPORT_SYMBOL(nftnl_set_unset); +void nftnl_set_unset(struct nftnl_set *s, uint16_t attr) +{ + struct nftnl_expr *expr, *tmp; + + if (!(s->flags & (1 << attr))) + return; + + switch (attr) { + case NFTNL_SET_TABLE: + xfree(s->table); + break; + case NFTNL_SET_NAME: + xfree(s->name); + break; + case NFTNL_SET_HANDLE: + case NFTNL_SET_FLAGS: + case NFTNL_SET_KEY_TYPE: + case NFTNL_SET_KEY_LEN: + case NFTNL_SET_DATA_TYPE: + case NFTNL_SET_DATA_LEN: + case NFTNL_SET_OBJ_TYPE: + case NFTNL_SET_FAMILY: + case NFTNL_SET_ID: + case NFTNL_SET_POLICY: + case NFTNL_SET_DESC_SIZE: + case NFTNL_SET_DESC_CONCAT: + case NFTNL_SET_TIMEOUT: + case NFTNL_SET_GC_INTERVAL: + break; + case NFTNL_SET_USERDATA: + xfree(s->user.data); + break; + case NFTNL_SET_EXPR: + case NFTNL_SET_EXPRESSIONS: + list_for_each_entry_safe(expr, tmp, &s->expr_list, head) + nftnl_expr_free(expr); + break; + default: + return; + } + + s->flags &= ~(1 << attr); +} + +static uint32_t nftnl_set_validate[NFTNL_SET_MAX + 1] = { + [NFTNL_SET_HANDLE] = sizeof(uint64_t), + [NFTNL_SET_FLAGS] = sizeof(uint32_t), + [NFTNL_SET_KEY_TYPE] = sizeof(uint32_t), + [NFTNL_SET_KEY_LEN] = sizeof(uint32_t), + [NFTNL_SET_DATA_TYPE] = sizeof(uint32_t), + [NFTNL_SET_DATA_LEN] = sizeof(uint32_t), + [NFTNL_SET_OBJ_TYPE] = sizeof(uint32_t), + [NFTNL_SET_FAMILY] = sizeof(uint32_t), + [NFTNL_SET_POLICY] = sizeof(uint32_t), + [NFTNL_SET_DESC_SIZE] = sizeof(uint32_t), + [NFTNL_SET_TIMEOUT] = sizeof(uint64_t), + [NFTNL_SET_GC_INTERVAL] = sizeof(uint32_t), +}; + +EXPORT_SYMBOL(nftnl_set_set_data); +int nftnl_set_set_data(struct nftnl_set *s, uint16_t attr, const void *data, + uint32_t data_len) +{ + struct nftnl_expr *expr, *tmp; + + nftnl_assert_attr_exists(attr, NFTNL_SET_MAX); + nftnl_assert_validate(data, nftnl_set_validate, attr, data_len); + + switch(attr) { + case NFTNL_SET_TABLE: + if (s->flags & (1 << NFTNL_SET_TABLE)) + xfree(s->table); + + s->table = strdup(data); + if (!s->table) + return -1; + break; + case NFTNL_SET_NAME: + if (s->flags & (1 << NFTNL_SET_NAME)) + xfree(s->name); + + s->name = strdup(data); + if (!s->name) + return -1; + break; + case NFTNL_SET_HANDLE: + memcpy(&s->handle, data, sizeof(s->handle)); + break; + case NFTNL_SET_FLAGS: + memcpy(&s->set_flags, data, sizeof(s->set_flags)); + break; + case NFTNL_SET_KEY_TYPE: + memcpy(&s->key_type, data, sizeof(s->key_type)); + break; + case NFTNL_SET_KEY_LEN: + memcpy(&s->key_len, data, sizeof(s->key_len)); + break; + case NFTNL_SET_DATA_TYPE: + memcpy(&s->data_type, data, sizeof(s->data_type)); + break; + case NFTNL_SET_DATA_LEN: + memcpy(&s->data_len, data, sizeof(s->data_len)); + break; + case NFTNL_SET_OBJ_TYPE: + memcpy(&s->obj_type, data, sizeof(s->obj_type)); + break; + case NFTNL_SET_FAMILY: + memcpy(&s->family, data, sizeof(s->family)); + break; + case NFTNL_SET_ID: + memcpy(&s->id, data, sizeof(s->id)); + break; + case NFTNL_SET_POLICY: + memcpy(&s->policy, data, sizeof(s->policy)); + break; + case NFTNL_SET_DESC_SIZE: + memcpy(&s->desc.size, data, sizeof(s->desc.size)); + break; + case NFTNL_SET_DESC_CONCAT: + memcpy(&s->desc.field_len, data, data_len); + while (s->desc.field_len[++s->desc.field_count]); + break; + case NFTNL_SET_TIMEOUT: + memcpy(&s->timeout, data, sizeof(s->timeout)); + break; + case NFTNL_SET_GC_INTERVAL: + memcpy(&s->gc_interval, data, sizeof(s->gc_interval)); + break; + case NFTNL_SET_USERDATA: + if (s->flags & (1 << NFTNL_SET_USERDATA)) + xfree(s->user.data); + + s->user.data = malloc(data_len); + if (!s->user.data) + return -1; + memcpy(s->user.data, data, data_len); + s->user.len = data_len; + break; + case NFTNL_SET_EXPR: + list_for_each_entry_safe(expr, tmp, &s->expr_list, head) + nftnl_expr_free(expr); + + expr = (void *)data; + list_add(&expr->head, &s->expr_list); + break; + } + s->flags |= (1 << attr); + return 0; +} + +int nftnl_set_set(struct nftnl_set *s, uint16_t attr, const void *data) __visible; +int nftnl_set_set(struct nftnl_set *s, uint16_t attr, const void *data) +{ + return nftnl_set_set_data(s, attr, data, nftnl_set_validate[attr]); +} + +EXPORT_SYMBOL(nftnl_set_set_u32); +void nftnl_set_set_u32(struct nftnl_set *s, uint16_t attr, uint32_t val) +{ + nftnl_set_set_data(s, attr, &val, sizeof(uint32_t)); +} + +EXPORT_SYMBOL(nftnl_set_set_u64); +void nftnl_set_set_u64(struct nftnl_set *s, uint16_t attr, uint64_t val) +{ + nftnl_set_set_data(s, attr, &val, sizeof(uint64_t)); +} + +EXPORT_SYMBOL(nftnl_set_set_str); +int nftnl_set_set_str(struct nftnl_set *s, uint16_t attr, const char *str) +{ + return nftnl_set_set_data(s, attr, str, strlen(str) + 1); +} + +EXPORT_SYMBOL(nftnl_set_get_data); +const void *nftnl_set_get_data(const struct nftnl_set *s, uint16_t attr, + uint32_t *data_len) +{ + struct nftnl_expr *expr; + + if (!(s->flags & (1 << attr))) + return NULL; + + switch(attr) { + case NFTNL_SET_TABLE: + *data_len = strlen(s->table) + 1; + return s->table; + case NFTNL_SET_NAME: + *data_len = strlen(s->name) + 1; + return s->name; + case NFTNL_SET_HANDLE: + *data_len = sizeof(uint64_t); + return &s->handle; + case NFTNL_SET_FLAGS: + *data_len = sizeof(uint32_t); + return &s->set_flags; + case NFTNL_SET_KEY_TYPE: + *data_len = sizeof(uint32_t); + return &s->key_type; + case NFTNL_SET_KEY_LEN: + *data_len = sizeof(uint32_t); + return &s->key_len; + case NFTNL_SET_DATA_TYPE: + *data_len = sizeof(uint32_t); + return &s->data_type; + case NFTNL_SET_DATA_LEN: + *data_len = sizeof(uint32_t); + return &s->data_len; + case NFTNL_SET_OBJ_TYPE: + *data_len = sizeof(uint32_t); + return &s->obj_type; + case NFTNL_SET_FAMILY: + *data_len = sizeof(uint32_t); + return &s->family; + case NFTNL_SET_ID: + *data_len = sizeof(uint32_t); + return &s->id; + case NFTNL_SET_POLICY: + *data_len = sizeof(uint32_t); + return &s->policy; + case NFTNL_SET_DESC_SIZE: + *data_len = sizeof(uint32_t); + return &s->desc.size; + case NFTNL_SET_DESC_CONCAT: + *data_len = s->desc.field_count; + return s->desc.field_len; + case NFTNL_SET_TIMEOUT: + *data_len = sizeof(uint64_t); + return &s->timeout; + case NFTNL_SET_GC_INTERVAL: + *data_len = sizeof(uint32_t); + return &s->gc_interval; + case NFTNL_SET_USERDATA: + *data_len = s->user.len; + return s->user.data; + case NFTNL_SET_EXPR: + list_for_each_entry(expr, &s->expr_list, head) + break; + return expr; + } + return NULL; +} + +EXPORT_SYMBOL(nftnl_set_get); +const void *nftnl_set_get(const struct nftnl_set *s, uint16_t attr) +{ + uint32_t data_len; + return nftnl_set_get_data(s, attr, &data_len); +} + +EXPORT_SYMBOL(nftnl_set_get_str); +const char *nftnl_set_get_str(const struct nftnl_set *s, uint16_t attr) +{ + return nftnl_set_get(s, attr); +} + +EXPORT_SYMBOL(nftnl_set_get_u32); +uint32_t nftnl_set_get_u32(const struct nftnl_set *s, uint16_t attr) +{ + uint32_t data_len; + const uint32_t *val = nftnl_set_get_data(s, attr, &data_len); + + nftnl_assert(val, attr, data_len == sizeof(uint32_t)); + + return val ? *val : 0; +} + +EXPORT_SYMBOL(nftnl_set_get_u64); +uint64_t nftnl_set_get_u64(const struct nftnl_set *s, uint16_t attr) +{ + uint32_t data_len; + const uint64_t *val = nftnl_set_get_data(s, attr, &data_len); + + nftnl_assert(val, attr, data_len == sizeof(uint64_t)); + + return val ? *val : 0; +} + +struct nftnl_set *nftnl_set_clone(const struct nftnl_set *set) +{ + struct nftnl_set *newset; + struct nftnl_set_elem *elem, *newelem; + + newset = nftnl_set_alloc(); + if (newset == NULL) + return NULL; + + memcpy(newset, set, sizeof(*set)); + + if (set->flags & (1 << NFTNL_SET_TABLE)) { + newset->table = strdup(set->table); + if (!newset->table) + goto err; + } + if (set->flags & (1 << NFTNL_SET_NAME)) { + newset->name = strdup(set->name); + if (!newset->name) + goto err; + } + + INIT_LIST_HEAD(&newset->element_list); + list_for_each_entry(elem, &set->element_list, head) { + newelem = nftnl_set_elem_clone(elem); + if (newelem == NULL) + goto err; + + list_add_tail(&newelem->head, &newset->element_list); + } + + return newset; +err: + nftnl_set_free(newset); + return NULL; +} + +static void nftnl_set_nlmsg_build_desc_size_payload(struct nlmsghdr *nlh, + struct nftnl_set *s) +{ + mnl_attr_put_u32(nlh, NFTA_SET_DESC_SIZE, htonl(s->desc.size)); +} + +static void nftnl_set_nlmsg_build_desc_concat_payload(struct nlmsghdr *nlh, + struct nftnl_set *s) +{ + struct nlattr *nest; + int i; + + nest = mnl_attr_nest_start(nlh, NFTA_SET_DESC_CONCAT); + for (i = 0; i < NFT_REG32_COUNT && i < s->desc.field_count; i++) { + struct nlattr *nest_elem; + + nest_elem = mnl_attr_nest_start(nlh, NFTA_LIST_ELEM); + mnl_attr_put_u32(nlh, NFTA_SET_FIELD_LEN, + htonl(s->desc.field_len[i])); + mnl_attr_nest_end(nlh, nest_elem); + } + mnl_attr_nest_end(nlh, nest); +} + +static void +nftnl_set_nlmsg_build_desc_payload(struct nlmsghdr *nlh, struct nftnl_set *s) +{ + struct nlattr *nest; + + nest = mnl_attr_nest_start(nlh, NFTA_SET_DESC); + + if (s->flags & (1 << NFTNL_SET_DESC_SIZE)) + nftnl_set_nlmsg_build_desc_size_payload(nlh, s); + if (s->flags & (1 << NFTNL_SET_DESC_CONCAT)) + nftnl_set_nlmsg_build_desc_concat_payload(nlh, s); + + mnl_attr_nest_end(nlh, nest); +} + +EXPORT_SYMBOL(nftnl_set_nlmsg_build_payload); +void nftnl_set_nlmsg_build_payload(struct nlmsghdr *nlh, struct nftnl_set *s) +{ + int num_exprs = 0; + + if (s->flags & (1 << NFTNL_SET_TABLE)) + mnl_attr_put_strz(nlh, NFTA_SET_TABLE, s->table); + if (s->flags & (1 << NFTNL_SET_NAME)) + mnl_attr_put_strz(nlh, NFTA_SET_NAME, s->name); + if (s->flags & (1 << NFTNL_SET_HANDLE)) + mnl_attr_put_u64(nlh, NFTA_SET_HANDLE, htobe64(s->handle)); + if (s->flags & (1 << NFTNL_SET_FLAGS)) + mnl_attr_put_u32(nlh, NFTA_SET_FLAGS, htonl(s->set_flags)); + if (s->flags & (1 << NFTNL_SET_KEY_TYPE)) + mnl_attr_put_u32(nlh, NFTA_SET_KEY_TYPE, htonl(s->key_type)); + if (s->flags & (1 << NFTNL_SET_KEY_LEN)) + mnl_attr_put_u32(nlh, NFTA_SET_KEY_LEN, htonl(s->key_len)); + /* These are only used to map matching -> action (1:1) */ + if (s->flags & (1 << NFTNL_SET_DATA_TYPE)) + mnl_attr_put_u32(nlh, NFTA_SET_DATA_TYPE, htonl(s->data_type)); + if (s->flags & (1 << NFTNL_SET_DATA_LEN)) + mnl_attr_put_u32(nlh, NFTA_SET_DATA_LEN, htonl(s->data_len)); + if (s->flags & (1 << NFTNL_SET_OBJ_TYPE)) + mnl_attr_put_u32(nlh, NFTA_SET_OBJ_TYPE, htonl(s->obj_type)); + if (s->flags & (1 << NFTNL_SET_ID)) + mnl_attr_put_u32(nlh, NFTA_SET_ID, htonl(s->id)); + if (s->flags & (1 << NFTNL_SET_POLICY)) + mnl_attr_put_u32(nlh, NFTA_SET_POLICY, htonl(s->policy)); + if (s->flags & (1 << NFTNL_SET_DESC_SIZE | 1 << NFTNL_SET_DESC_CONCAT)) + nftnl_set_nlmsg_build_desc_payload(nlh, s); + if (s->flags & (1 << NFTNL_SET_TIMEOUT)) + mnl_attr_put_u64(nlh, NFTA_SET_TIMEOUT, htobe64(s->timeout)); + if (s->flags & (1 << NFTNL_SET_GC_INTERVAL)) + mnl_attr_put_u32(nlh, NFTA_SET_GC_INTERVAL, htonl(s->gc_interval)); + if (s->flags & (1 << NFTNL_SET_USERDATA)) + mnl_attr_put(nlh, NFTA_SET_USERDATA, s->user.len, s->user.data); + if (!list_empty(&s->expr_list)) { + struct nftnl_expr *expr; + + list_for_each_entry(expr, &s->expr_list, head) + num_exprs++; + + if (num_exprs == 1) { + struct nlattr *nest1; + + nest1 = mnl_attr_nest_start(nlh, NFTA_SET_EXPR); + list_for_each_entry(expr, &s->expr_list, head) + nftnl_expr_build_payload(nlh, expr); + + mnl_attr_nest_end(nlh, nest1); + } else if (num_exprs > 1) { + struct nlattr *nest1, *nest2; + + nest1 = mnl_attr_nest_start(nlh, NFTA_SET_EXPRESSIONS); + list_for_each_entry(expr, &s->expr_list, head) { + nest2 = mnl_attr_nest_start(nlh, NFTA_LIST_ELEM); + nftnl_expr_build_payload(nlh, expr); + mnl_attr_nest_end(nlh, nest2); + } + mnl_attr_nest_end(nlh, nest1); + } + } +} + +EXPORT_SYMBOL(nftnl_set_add_expr); +void nftnl_set_add_expr(struct nftnl_set *s, struct nftnl_expr *expr) +{ + list_add_tail(&expr->head, &s->expr_list); +} + +EXPORT_SYMBOL(nftnl_set_expr_foreach); +int nftnl_set_expr_foreach(const struct nftnl_set *s, + int (*cb)(struct nftnl_expr *e, void *data), + void *data) +{ + struct nftnl_expr *cur, *tmp; + int ret; + + list_for_each_entry_safe(cur, tmp, &s->expr_list, head) { + ret = cb(cur, data); + if (ret < 0) + return ret; + } + return 0; +} + +static int nftnl_set_parse_attr_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_SET_MAX) < 0) + return MNL_CB_OK; + + switch(type) { + case NFTA_SET_TABLE: + case NFTA_SET_NAME: + if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0) + abi_breakage(); + break; + case NFTA_SET_HANDLE: + if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0) + abi_breakage(); + break; + case NFTA_SET_FLAGS: + case NFTA_SET_KEY_TYPE: + case NFTA_SET_KEY_LEN: + case NFTA_SET_DATA_TYPE: + case NFTA_SET_DATA_LEN: + case NFTA_SET_ID: + case NFTA_SET_POLICY: + case NFTA_SET_GC_INTERVAL: + if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) + abi_breakage(); + break; + case NFTA_SET_USERDATA: + if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0) + abi_breakage(); + break; + case NFTA_SET_TIMEOUT: + if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0) + abi_breakage(); + break; + case NFTA_SET_DESC: + case NFTA_SET_EXPR: + case NFTA_SET_EXPRESSIONS: + if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0) + abi_breakage(); + break; + } + + tb[type] = attr; + return MNL_CB_OK; +} + +static int +nftnl_set_desc_concat_field_parse_attr_cb(const struct nlattr *attr, void *data) +{ + int type = mnl_attr_get_type(attr); + struct nftnl_set *s = data; + + if (type != NFTA_SET_FIELD_LEN) + return MNL_CB_OK; + + if (mnl_attr_validate(attr, MNL_TYPE_U32)) + return MNL_CB_ERROR; + + s->desc.field_len[s->desc.field_count] = ntohl(mnl_attr_get_u32(attr)); + s->desc.field_count++; + + return MNL_CB_OK; +} + +static int +nftnl_set_desc_concat_parse_attr_cb(const struct nlattr *attr, void *data) +{ + int type = mnl_attr_get_type(attr); + struct nftnl_set *s = data; + + if (type != NFTA_LIST_ELEM) + return MNL_CB_OK; + + return mnl_attr_parse_nested(attr, + nftnl_set_desc_concat_field_parse_attr_cb, + s); +} + +static int nftnl_set_desc_parse_attr_cb(const struct nlattr *attr, void *data) +{ + int type = mnl_attr_get_type(attr), err; + struct nftnl_set *s = data; + + if (mnl_attr_type_valid(attr, NFTA_SET_DESC_MAX) < 0) + return MNL_CB_OK; + + switch (type) { + case NFTA_SET_DESC_SIZE: + if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { + abi_breakage(); + break; + } + + s->desc.size = ntohl(mnl_attr_get_u32(attr)); + s->flags |= (1 << NFTNL_SET_DESC_SIZE); + break; + case NFTA_SET_DESC_CONCAT: + err = mnl_attr_parse_nested(attr, + nftnl_set_desc_concat_parse_attr_cb, + s); + if (err != MNL_CB_OK) + abi_breakage(); + + s->flags |= (1 << NFTNL_SET_DESC_CONCAT); + break; + default: + break; + } + + return MNL_CB_OK; +} + +static int nftnl_set_desc_parse(struct nftnl_set *s, const struct nlattr *attr) +{ + return mnl_attr_parse_nested(attr, nftnl_set_desc_parse_attr_cb, s); +} + +EXPORT_SYMBOL(nftnl_set_nlmsg_parse); +int nftnl_set_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_set *s) +{ + struct nlattr *tb[NFTA_SET_MAX+1] = {}; + struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh); + struct nftnl_expr *expr, *next; + int ret; + + if (mnl_attr_parse(nlh, sizeof(*nfg), nftnl_set_parse_attr_cb, tb) < 0) + return -1; + + if (tb[NFTA_SET_TABLE]) { + if (s->flags & (1 << NFTNL_SET_TABLE)) + xfree(s->table); + s->table = strdup(mnl_attr_get_str(tb[NFTA_SET_TABLE])); + if (!s->table) + return -1; + s->flags |= (1 << NFTNL_SET_TABLE); + } + if (tb[NFTA_SET_NAME]) { + if (s->flags & (1 << NFTNL_SET_NAME)) + xfree(s->name); + s->name = strdup(mnl_attr_get_str(tb[NFTA_SET_NAME])); + if (!s->name) + return -1; + s->flags |= (1 << NFTNL_SET_NAME); + } + if (tb[NFTA_SET_HANDLE]) { + s->handle = be64toh(mnl_attr_get_u64(tb[NFTA_SET_HANDLE])); + s->flags |= (1 << NFTNL_SET_HANDLE); + } + if (tb[NFTA_SET_FLAGS]) { + s->set_flags = ntohl(mnl_attr_get_u32(tb[NFTA_SET_FLAGS])); + s->flags |= (1 << NFTNL_SET_FLAGS); + } + if (tb[NFTA_SET_KEY_TYPE]) { + s->key_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_KEY_TYPE])); + s->flags |= (1 << NFTNL_SET_KEY_TYPE); + } + if (tb[NFTA_SET_KEY_LEN]) { + s->key_len = ntohl(mnl_attr_get_u32(tb[NFTA_SET_KEY_LEN])); + s->flags |= (1 << NFTNL_SET_KEY_LEN); + } + if (tb[NFTA_SET_DATA_TYPE]) { + s->data_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_DATA_TYPE])); + s->flags |= (1 << NFTNL_SET_DATA_TYPE); + } + if (tb[NFTA_SET_DATA_LEN]) { + s->data_len = ntohl(mnl_attr_get_u32(tb[NFTA_SET_DATA_LEN])); + s->flags |= (1 << NFTNL_SET_DATA_LEN); + } + if (tb[NFTA_SET_OBJ_TYPE]) { + s->obj_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_OBJ_TYPE])); + s->flags |= (1 << NFTNL_SET_OBJ_TYPE); + } + if (tb[NFTA_SET_ID]) { + s->id = ntohl(mnl_attr_get_u32(tb[NFTA_SET_ID])); + s->flags |= (1 << NFTNL_SET_ID); + } + if (tb[NFTA_SET_POLICY]) { + s->policy = ntohl(mnl_attr_get_u32(tb[NFTA_SET_POLICY])); + s->flags |= (1 << NFTNL_SET_POLICY); + } + if (tb[NFTA_SET_TIMEOUT]) { + s->timeout = be64toh(mnl_attr_get_u64(tb[NFTA_SET_TIMEOUT])); + s->flags |= (1 << NFTNL_SET_TIMEOUT); + } + if (tb[NFTA_SET_GC_INTERVAL]) { + s->gc_interval = ntohl(mnl_attr_get_u32(tb[NFTA_SET_GC_INTERVAL])); + s->flags |= (1 << NFTNL_SET_GC_INTERVAL); + } + if (tb[NFTA_SET_USERDATA]) { + ret = nftnl_set_set_data(s, NFTNL_SET_USERDATA, + mnl_attr_get_payload(tb[NFTA_SET_USERDATA]), + mnl_attr_get_payload_len(tb[NFTA_SET_USERDATA])); + if (ret < 0) + return ret; + } + if (tb[NFTA_SET_DESC]) { + ret = nftnl_set_desc_parse(s, tb[NFTA_SET_DESC]); + if (ret < 0) + return ret; + } + if (tb[NFTA_SET_EXPR]) { + expr = nftnl_expr_parse(tb[NFTA_SET_EXPR]); + if (!expr) + goto out_set_expr; + + list_add(&expr->head, &s->expr_list); + s->flags |= (1 << NFTNL_SET_EXPR); + } else if (tb[NFTA_SET_EXPRESSIONS]) { + struct nlattr *attr; + + mnl_attr_for_each_nested(attr, tb[NFTA_SET_EXPRESSIONS]) { + if (mnl_attr_get_type(attr) != NFTA_LIST_ELEM) + goto out_set_expr; + + expr = nftnl_expr_parse(attr); + if (expr == NULL) + goto out_set_expr; + + list_add_tail(&expr->head, &s->expr_list); + } + s->flags |= (1 << NFTNL_SET_EXPRESSIONS); + } + + s->family = nfg->nfgen_family; + s->flags |= (1 << NFTNL_SET_FAMILY); + + return 0; +out_set_expr: + list_for_each_entry_safe(expr, next, &s->expr_list, head) + nftnl_expr_free(expr); + + return -1; +} + +static int nftnl_set_do_parse(struct nftnl_set *s, enum nftnl_parse_type type, + const void *data, struct nftnl_parse_err *err, + enum nftnl_parse_input input) +{ + int ret; + struct nftnl_parse_err perr = {}; + + switch (type) { + case NFTNL_PARSE_JSON: + case NFTNL_PARSE_XML: + default: + ret = -1; + errno = EOPNOTSUPP; + break; + } + + if (err != NULL) + *err = perr; + + return ret; +} + +EXPORT_SYMBOL(nftnl_set_parse); +int nftnl_set_parse(struct nftnl_set *s, enum nftnl_parse_type type, + const char *data, struct nftnl_parse_err *err) +{ + return nftnl_set_do_parse(s, type, data, err, NFTNL_PARSE_BUFFER); +} + +EXPORT_SYMBOL(nftnl_set_parse_file); +int nftnl_set_parse_file(struct nftnl_set *s, enum nftnl_parse_type type, + FILE *fp, struct nftnl_parse_err *err) +{ + return nftnl_set_do_parse(s, type, fp, err, NFTNL_PARSE_FILE); +} + +static int nftnl_set_snprintf_default(char *buf, size_t remain, + const struct nftnl_set *s, + uint32_t type, uint32_t flags) +{ + struct nftnl_set_elem *elem; + int ret, offset = 0; + + ret = snprintf(buf, remain, "%s %s %x", + s->name, s->table, s->set_flags); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + + if (s->flags & (1 << NFTNL_SET_TIMEOUT)) { + ret = snprintf(buf + offset, remain, " timeout %"PRIu64"ms", + s->timeout); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + } + + if (s->flags & (1 << NFTNL_SET_GC_INTERVAL)) { + ret = snprintf(buf + offset, remain, " gc_interval %ums", + s->gc_interval); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + } + + if (s->flags & (1 << NFTNL_SET_POLICY)) { + ret = snprintf(buf + offset, remain, " policy %u", s->policy); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + } + + if (s->flags & (1 << NFTNL_SET_DESC_SIZE)) { + ret = snprintf(buf + offset, remain, " size %u", s->desc.size); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + } + + /* Empty set? Skip printinf of elements */ + if (list_empty(&s->element_list)) + return offset; + + ret = snprintf(buf + offset, remain, "\n"); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + + list_for_each_entry(elem, &s->element_list, head) { + ret = snprintf(buf + offset, remain, "\t"); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + + ret = nftnl_set_elem_snprintf_default(buf + offset, remain, + elem); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + } + + return offset; +} + +static int nftnl_set_cmd_snprintf(char *buf, size_t remain, + const struct nftnl_set *s, uint32_t cmd, + uint32_t type, uint32_t flags) +{ + uint32_t inner_flags = flags; + int ret, offset = 0; + + if (type != NFTNL_OUTPUT_DEFAULT) + return -1; + + /* prevent set_elems to print as events */ + inner_flags &= ~NFTNL_OF_EVENT_ANY; + + ret = nftnl_set_snprintf_default(buf + offset, remain, s, type, + inner_flags); + SNPRINTF_BUFFER_SIZE(ret, remain, offset); + return offset; +} + +EXPORT_SYMBOL(nftnl_set_snprintf); +int nftnl_set_snprintf(char *buf, size_t size, const struct nftnl_set *s, + uint32_t type, uint32_t flags) +{ + if (size) + buf[0] = '\0'; + + return nftnl_set_cmd_snprintf(buf, size, s, nftnl_flag2cmd(flags), type, + flags); +} + +static int nftnl_set_do_snprintf(char *buf, size_t size, const void *s, + uint32_t cmd, uint32_t type, uint32_t flags) +{ + return nftnl_set_snprintf(buf, size, s, type, flags); +} + +EXPORT_SYMBOL(nftnl_set_fprintf); +int nftnl_set_fprintf(FILE *fp, const struct nftnl_set *s, uint32_t type, + uint32_t flags) +{ + return nftnl_fprintf(fp, s, NFTNL_CMD_UNSPEC, type, flags, + nftnl_set_do_snprintf); +} + +EXPORT_SYMBOL(nftnl_set_elem_add); +void nftnl_set_elem_add(struct nftnl_set *s, struct nftnl_set_elem *elem) +{ + list_add_tail(&elem->head, &s->element_list); +} + +#define SET_NAME_HSIZE 512 + +struct nftnl_set_list { + struct list_head list; + struct hlist_head name_hash[SET_NAME_HSIZE]; +}; + +EXPORT_SYMBOL(nftnl_set_list_alloc); +struct nftnl_set_list *nftnl_set_list_alloc(void) +{ + struct nftnl_set_list *list; + int i; + + list = calloc(1, sizeof(struct nftnl_set_list)); + if (list == NULL) + return NULL; + + INIT_LIST_HEAD(&list->list); + for (i = 0; i < SET_NAME_HSIZE; i++) + INIT_HLIST_HEAD(&list->name_hash[i]); + + return list; +} + +EXPORT_SYMBOL(nftnl_set_list_free); +void nftnl_set_list_free(struct nftnl_set_list *list) +{ + struct nftnl_set *s, *tmp; + + list_for_each_entry_safe(s, tmp, &list->list, head) { + list_del(&s->head); + hlist_del(&s->hnode); + nftnl_set_free(s); + } + xfree(list); +} + +EXPORT_SYMBOL(nftnl_set_list_is_empty); +int nftnl_set_list_is_empty(const struct nftnl_set_list *list) +{ + return list_empty(&list->list); +} + +static uint32_t djb_hash(const char *key) +{ + uint32_t i, hash = 5381; + + for (i = 0; i < strlen(key); i++) + hash = ((hash << 5) + hash) + key[i]; + + return hash; +} + +EXPORT_SYMBOL(nftnl_set_list_add); +void nftnl_set_list_add(struct nftnl_set *s, struct nftnl_set_list *list) +{ + int key = djb_hash(s->name) % SET_NAME_HSIZE; + + hlist_add_head(&s->hnode, &list->name_hash[key]); + list_add(&s->head, &list->list); +} + +EXPORT_SYMBOL(nftnl_set_list_add_tail); +void nftnl_set_list_add_tail(struct nftnl_set *s, struct nftnl_set_list *list) +{ + int key = djb_hash(s->name) % SET_NAME_HSIZE; + + hlist_add_head(&s->hnode, &list->name_hash[key]); + list_add_tail(&s->head, &list->list); +} + +EXPORT_SYMBOL(nftnl_set_list_del); +void nftnl_set_list_del(struct nftnl_set *s) +{ + list_del(&s->head); + hlist_del(&s->hnode); +} + +EXPORT_SYMBOL(nftnl_set_list_foreach); +int nftnl_set_list_foreach(struct nftnl_set_list *set_list, + int (*cb)(struct nftnl_set *t, void *data), void *data) +{ + struct nftnl_set *cur, *tmp; + int ret; + + list_for_each_entry_safe(cur, tmp, &set_list->list, head) { + ret = cb(cur, data); + if (ret < 0) + return ret; + } + return 0; +} + +struct nftnl_set_list_iter { + const struct nftnl_set_list *list; + struct nftnl_set *cur; +}; + +EXPORT_SYMBOL(nftnl_set_list_iter_create); +struct nftnl_set_list_iter * +nftnl_set_list_iter_create(const struct nftnl_set_list *l) +{ + struct nftnl_set_list_iter *iter; + + iter = calloc(1, sizeof(struct nftnl_set_list_iter)); + if (iter == NULL) + return NULL; + + iter->list = l; + if (nftnl_set_list_is_empty(l)) + iter->cur = NULL; + else + iter->cur = list_entry(l->list.next, struct nftnl_set, head); + + return iter; +} + +EXPORT_SYMBOL(nftnl_set_list_iter_cur); +struct nftnl_set * +nftnl_set_list_iter_cur(const struct nftnl_set_list_iter *iter) +{ + return iter->cur; +} + +EXPORT_SYMBOL(nftnl_set_list_iter_next); +struct nftnl_set *nftnl_set_list_iter_next(struct nftnl_set_list_iter *iter) +{ + struct nftnl_set *s = iter->cur; + + if (s == NULL) + return NULL; + + /* get next rule, if any */ + iter->cur = list_entry(iter->cur->head.next, struct nftnl_set, head); + if (&iter->cur->head == iter->list->list.next) + return NULL; + + return s; +} + +EXPORT_SYMBOL(nftnl_set_list_iter_destroy); +void nftnl_set_list_iter_destroy(const struct nftnl_set_list_iter *iter) +{ + xfree(iter); +} + +EXPORT_SYMBOL(nftnl_set_list_lookup_byname); +struct nftnl_set * +nftnl_set_list_lookup_byname(struct nftnl_set_list *set_list, const char *set) +{ + int key = djb_hash(set) % SET_NAME_HSIZE; + struct hlist_node *n; + struct nftnl_set *s; + + hlist_for_each_entry(s, n, &set_list->name_hash[key], hnode) { + if (!strcmp(set, s->name)) + return s; + } + return NULL; +} + +int nftnl_set_lookup_id(struct nftnl_expr *e, + struct nftnl_set_list *set_list, uint32_t *set_id) +{ + const char *set_name; + struct nftnl_set *s; + + set_name = nftnl_expr_get_str(e, NFTNL_EXPR_LOOKUP_SET); + if (set_name == NULL) + return 0; + + s = nftnl_set_list_lookup_byname(set_list, set_name); + if (s == NULL) + return 0; + + *set_id = nftnl_set_get_u32(s, NFTNL_SET_ID); + return 1; +} |