From c83c53a26de25c1e2900f7841647cec3b57c7438 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Neira=20Ayuso?= Date: Tue, 20 Aug 2013 17:58:46 +0200 Subject: rule: Add json parser support Add function for parsing rules in JSON format Signed-off-by: Alvaro Neira Ayuso Signed-off-by: Pablo Neira Ayuso --- src/rule.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) (limited to 'src/rule.c') diff --git a/src/rule.c b/src/rule.c index 7f905d2..98e7940 100644 --- a/src/rule.c +++ b/src/rule.c @@ -475,6 +475,93 @@ int nft_rule_nlmsg_parse(const struct nlmsghdr *nlh, struct nft_rule *r) } EXPORT_SYMBOL(nft_rule_nlmsg_parse); +static int nft_rule_json_parse(struct nft_rule *r, char *json) +{ +#ifdef JSON_PARSING + json_t *root, *node, *array; + json_error_t error; + struct nft_rule_expr *e; + const char *str = NULL; + uint64_t uval64; + uint32_t uval32; + int i, family; + + node = nft_jansson_create_root(json, &error); + if (node == NULL) + return -1; + + root = nft_jansson_get_node(node, "rule"); + if (root == NULL) + return -1; + + if (nft_jansson_parse_family(root, &family) != 0) + goto err; + + nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FAMILY, family); + + str = nft_jansson_value_parse_str(root, "table"); + if (str == NULL) + goto err; + + nft_rule_attr_set_str(r, NFT_RULE_ATTR_TABLE, str); + + str = nft_jansson_value_parse_str(root, "chain"); + if (str == NULL) + goto err; + + nft_rule_attr_set_str(r, NFT_RULE_ATTR_CHAIN, str); + + if (nft_jansson_value_parse_val(root, "handle", + NFT_TYPE_U64, &uval64) == -1) + goto err; + + nft_rule_attr_set_u64(r, NFT_RULE_ATTR_HANDLE, uval64); + + if (nft_jansson_value_parse_val(root, "flags", + NFT_TYPE_U32, &uval32) == -1) + goto err; + + nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, uval32); + + if (nft_jansson_node_exist(root, "compat_proto") || + nft_jansson_node_exist(root, "compat_flags")) { + if (nft_jansson_value_parse_val(root, "compat_proto", + NFT_TYPE_U32, &uval32) == -1) + goto err; + + nft_rule_attr_set_u32(r, NFT_RULE_ATTR_COMPAT_PROTO, uval32); + + if (nft_jansson_value_parse_val(root, "compat_flags", + NFT_TYPE_U32, &uval32) == -1) + goto err; + + nft_rule_attr_set_u32(r, NFT_RULE_ATTR_COMPAT_FLAGS, uval32); + } + + array = json_object_get(root, "expr"); + if (array == NULL) + goto err; + + for (i = 0; i < json_array_size(array); ++i) { + + e = nft_jansson_expr_parse(json_array_get(array, i)); + if (e == NULL) + goto err; + + nft_rule_add_expr(r, e); + } + + json_decref(node); + return 0; +err: + json_decref(node); + return -1; +#else + errno = EOPNOTSUPP; + return -1; +#endif +} + static int nft_rule_xml_parse(struct nft_rule *r, char *xml) { #ifdef XML_PARSING @@ -589,6 +676,9 @@ int nft_rule_parse(struct nft_rule *r, enum nft_rule_parse_type type, char *data case NFT_RULE_PARSE_XML: ret = nft_rule_xml_parse(r, data); break; + case NFT_RULE_PARSE_JSON: + ret = nft_rule_json_parse(r, data); + break; default: ret = -1; errno = EOPNOTSUPP; -- cgit v1.2.3