8 #include <libmnl/libmnl.h> 9 #include <linux/netfilter/nf_tables.h> 10 #include <libnftnl/rule.h> 11 #include <libnftnl/expr.h> 17 static int nftnl_expr_flow_set(
struct nftnl_expr *e, uint16_t type,
18 const void *data, uint32_t data_len)
23 case NFTNL_EXPR_FLOW_TABLE_NAME:
24 flow->table_name = strdup((
const char *)data);
25 if (!flow->table_name)
34 static const void *nftnl_expr_flow_get(
const struct nftnl_expr *e,
35 uint16_t type, uint32_t *data_len)
40 case NFTNL_EXPR_FLOW_TABLE_NAME:
41 *data_len = strlen(flow->table_name) + 1;
42 return flow->table_name;
47 static int nftnl_expr_flow_cb(
const struct nlattr *attr,
void *data)
49 const struct nlattr **tb = data;
50 int type = mnl_attr_get_type(attr);
52 if (mnl_attr_type_valid(attr, NFTA_FLOW_MAX) < 0)
56 case NFTA_FLOW_TABLE_NAME:
57 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
66 static void nftnl_expr_flow_build(
struct nlmsghdr *nlh,
67 const struct nftnl_expr *e)
71 if (e->flags & (1 << NFTNL_EXPR_FLOW_TABLE_NAME))
72 mnl_attr_put_strz(nlh, NFTA_FLOW_TABLE_NAME, flow->table_name);
75 static int nftnl_expr_flow_parse(
struct nftnl_expr *e,
struct nlattr *attr)
78 struct nlattr *tb[NFTA_FLOW_MAX+1] = {};
81 if (mnl_attr_parse_nested(attr, nftnl_expr_flow_cb, tb) < 0)
84 if (tb[NFTA_FLOW_TABLE_NAME]) {
86 strdup(mnl_attr_get_str(tb[NFTA_FLOW_TABLE_NAME]));
87 if (!flow->table_name)
89 e->flags |= (1 << NFTNL_EXPR_FLOW_TABLE_NAME);
95 static int nftnl_expr_flow_snprintf_default(
char *buf,
size_t size,
96 const struct nftnl_expr *e)
98 int remain = size, offset = 0, ret;
101 ret = snprintf(buf, remain,
"flowtable %s ", l->table_name);
102 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
107 static int nftnl_expr_flow_snprintf(
char *buf,
size_t size, uint32_t type,
108 uint32_t flags,
const struct nftnl_expr *e)
111 case NFTNL_OUTPUT_DEFAULT:
112 return nftnl_expr_flow_snprintf_default(buf, size, e);
113 case NFTNL_OUTPUT_XML:
114 case NFTNL_OUTPUT_JSON:
121 static void nftnl_expr_flow_free(
const struct nftnl_expr *e)
125 xfree(flow->table_name);
128 struct expr_ops expr_ops_flow = {
129 .name =
"flow_offload",
131 .max_attr = NFTA_FLOW_MAX,
132 .free = nftnl_expr_flow_free,
133 .set = nftnl_expr_flow_set,
134 .get = nftnl_expr_flow_get,
135 .parse = nftnl_expr_flow_parse,
136 .build = nftnl_expr_flow_build,
137 .snprintf = nftnl_expr_flow_snprintf,