18#include <libmnl/libmnl.h>
19#include <linux/netfilter/nf_tables.h>
20#include <libnftnl/expr.h>
21#include <libnftnl/rule.h>
24 enum nft_registers sreg_addr;
25 enum nft_registers sreg_port;
30nftnl_expr_tproxy_set(
struct nftnl_expr *e, uint16_t type,
31 const void *data, uint32_t data_len)
36 case NFTNL_EXPR_TPROXY_FAMILY:
37 memcpy(&tproxy->family, data, data_len);
39 case NFTNL_EXPR_TPROXY_REG_ADDR:
40 memcpy(&tproxy->sreg_addr, data, data_len);
42 case NFTNL_EXPR_TPROXY_REG_PORT:
43 memcpy(&tproxy->sreg_port, data, data_len);
51nftnl_expr_tproxy_get(
const struct nftnl_expr *e, uint16_t type,
57 case NFTNL_EXPR_TPROXY_FAMILY:
58 *data_len =
sizeof(tproxy->family);
59 return &tproxy->family;
60 case NFTNL_EXPR_TPROXY_REG_ADDR:
61 *data_len =
sizeof(tproxy->sreg_addr);
62 return &tproxy->sreg_addr;
63 case NFTNL_EXPR_TPROXY_REG_PORT:
64 *data_len =
sizeof(tproxy->sreg_port);
65 return &tproxy->sreg_port;
70static int nftnl_expr_tproxy_cb(
const struct nlattr *attr,
void *data)
72 const struct nlattr **tb = data;
73 int type = mnl_attr_get_type(attr);
75 if (mnl_attr_type_valid(attr, NFTA_TPROXY_MAX) < 0)
79 case NFTA_TPROXY_FAMILY:
80 case NFTA_TPROXY_REG_ADDR:
81 case NFTA_TPROXY_REG_PORT:
82 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
92nftnl_expr_tproxy_parse(
struct nftnl_expr *e,
struct nlattr *attr)
95 struct nlattr *tb[NFTA_TPROXY_MAX + 1] = {};
97 if (mnl_attr_parse_nested(attr, nftnl_expr_tproxy_cb, tb) < 0)
100 if (tb[NFTA_TPROXY_FAMILY]) {
101 tproxy->family = ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_FAMILY]));
102 e->flags |= (1 << NFTNL_EXPR_TPROXY_FAMILY);
104 if (tb[NFTA_TPROXY_REG_ADDR]) {
106 ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_REG_ADDR]));
107 e->flags |= (1 << NFTNL_EXPR_TPROXY_REG_ADDR);
109 if (tb[NFTA_TPROXY_REG_PORT]) {
111 ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_REG_PORT]));
112 e->flags |= (1 << NFTNL_EXPR_TPROXY_REG_PORT);
119nftnl_expr_tproxy_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
123 if (e->flags & (1 << NFTNL_EXPR_TPROXY_FAMILY))
124 mnl_attr_put_u32(nlh, NFTA_TPROXY_FAMILY, htonl(tproxy->family));
126 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_ADDR))
127 mnl_attr_put_u32(nlh, NFTA_TPROXY_REG_ADDR,
128 htonl(tproxy->sreg_addr));
130 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_PORT))
131 mnl_attr_put_u32(nlh, NFTA_TPROXY_REG_PORT,
132 htonl(tproxy->sreg_port));
136nftnl_expr_tproxy_snprintf(
char *buf,
size_t remain,
137 uint32_t flags,
const struct nftnl_expr *e)
140 int offset = 0, ret = 0;
142 if (tproxy->family != NFTA_TPROXY_UNSPEC) {
143 ret = snprintf(buf + offset, remain,
"%s ",
144 nftnl_family2str(tproxy->family));
145 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
148 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_ADDR)) {
149 ret = snprintf(buf + offset, remain,
150 "addr reg %u ", tproxy->sreg_addr);
151 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
154 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_PORT)) {
155 ret = snprintf(buf + offset, remain,
156 "port reg %u ", tproxy->sreg_port);
157 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
163static struct attr_policy tproxy_attr_policy[__NFTNL_EXPR_TPROXY_MAX] = {
164 [NFTNL_EXPR_TPROXY_FAMILY] = { .maxlen =
sizeof(uint32_t) },
165 [NFTNL_EXPR_TPROXY_REG_ADDR] = { .maxlen =
sizeof(uint32_t) },
166 [NFTNL_EXPR_TPROXY_REG_PORT] = { .maxlen =
sizeof(uint32_t) },
169struct expr_ops expr_ops_tproxy = {
172 .nftnl_max_attr = __NFTNL_EXPR_TPROXY_MAX - 1,
173 .attr_policy = tproxy_attr_policy,
174 .set = nftnl_expr_tproxy_set,
175 .get = nftnl_expr_tproxy_get,
176 .parse = nftnl_expr_tproxy_parse,
177 .build = nftnl_expr_tproxy_build,
178 .output = nftnl_expr_tproxy_snprintf,