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,
sizeof(tproxy->family));
39 case NFTNL_EXPR_TPROXY_REG_ADDR:
40 memcpy(&tproxy->sreg_addr, data,
sizeof(tproxy->sreg_addr));
42 case NFTNL_EXPR_TPROXY_REG_PORT:
43 memcpy(&tproxy->sreg_port, data,
sizeof(tproxy->sreg_port));
53nftnl_expr_tproxy_get(
const struct nftnl_expr *e, uint16_t type,
59 case NFTNL_EXPR_TPROXY_FAMILY:
60 *data_len =
sizeof(tproxy->family);
61 return &tproxy->family;
62 case NFTNL_EXPR_TPROXY_REG_ADDR:
63 *data_len =
sizeof(tproxy->sreg_addr);
64 return &tproxy->sreg_addr;
65 case NFTNL_EXPR_TPROXY_REG_PORT:
66 *data_len =
sizeof(tproxy->sreg_port);
67 return &tproxy->sreg_port;
72static int nftnl_expr_tproxy_cb(
const struct nlattr *attr,
void *data)
74 const struct nlattr **tb = data;
75 int type = mnl_attr_get_type(attr);
77 if (mnl_attr_type_valid(attr, NFTA_TPROXY_MAX) < 0)
81 case NFTA_TPROXY_FAMILY:
82 case NFTA_TPROXY_REG_ADDR:
83 case NFTA_TPROXY_REG_PORT:
84 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
94nftnl_expr_tproxy_parse(
struct nftnl_expr *e,
struct nlattr *attr)
97 struct nlattr *tb[NFTA_TPROXY_MAX + 1] = {};
99 if (mnl_attr_parse_nested(attr, nftnl_expr_tproxy_cb, tb) < 0)
102 if (tb[NFTA_TPROXY_FAMILY]) {
103 tproxy->family = ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_FAMILY]));
104 e->flags |= (1 << NFTNL_EXPR_TPROXY_FAMILY);
106 if (tb[NFTA_TPROXY_REG_ADDR]) {
108 ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_REG_ADDR]));
109 e->flags |= (1 << NFTNL_EXPR_TPROXY_REG_ADDR);
111 if (tb[NFTA_TPROXY_REG_PORT]) {
113 ntohl(mnl_attr_get_u32(tb[NFTA_TPROXY_REG_PORT]));
114 e->flags |= (1 << NFTNL_EXPR_TPROXY_REG_PORT);
121nftnl_expr_tproxy_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
125 if (e->flags & (1 << NFTNL_EXPR_TPROXY_FAMILY))
126 mnl_attr_put_u32(nlh, NFTA_TPROXY_FAMILY, htonl(tproxy->family));
128 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_ADDR))
129 mnl_attr_put_u32(nlh, NFTA_TPROXY_REG_ADDR,
130 htonl(tproxy->sreg_addr));
132 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_PORT))
133 mnl_attr_put_u32(nlh, NFTA_TPROXY_REG_PORT,
134 htonl(tproxy->sreg_port));
138nftnl_expr_tproxy_snprintf(
char *buf,
size_t remain,
139 uint32_t flags,
const struct nftnl_expr *e)
142 int offset = 0, ret = 0;
144 if (tproxy->family != NFTA_TPROXY_UNSPEC) {
145 ret = snprintf(buf + offset, remain,
"%s ",
146 nftnl_family2str(tproxy->family));
147 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
150 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_ADDR)) {
151 ret = snprintf(buf + offset, remain,
152 "addr reg %u ", tproxy->sreg_addr);
153 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
156 if (e->flags & (1 << NFTNL_EXPR_TPROXY_REG_PORT)) {
157 ret = snprintf(buf + offset, remain,
158 "port reg %u ", tproxy->sreg_port);
159 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
165struct expr_ops expr_ops_tproxy = {
168 .max_attr = NFTA_TPROXY_MAX,
169 .set = nftnl_expr_tproxy_set,
170 .get = nftnl_expr_tproxy_get,
171 .parse = nftnl_expr_tproxy_parse,
172 .build = nftnl_expr_tproxy_build,
173 .output = nftnl_expr_tproxy_snprintf,