1 files changed, 136 insertions, 0 deletions
diff --git a/iptables/nft-ruleparse.h b/iptables/nft-ruleparse.h
new file mode 100644
index 00000000..62c9160d
--- /dev/null
+++ b/iptables/nft-ruleparse.h
@@ -0,0 +1,136 @@
+#ifndef _NFT_RULEPARSE_H_
+#define _NFT_RULEPARSE_H_
+
+#include <linux/netfilter/nf_tables.h>
+
+#include <libnftnl/expr.h>
+
+#include "xshared.h"
+
+enum nft_ctx_reg_type {
+	NFT_XT_REG_UNDEF,
+	NFT_XT_REG_PAYLOAD,
+	NFT_XT_REG_IMMEDIATE,
+	NFT_XT_REG_META_DREG,
+};
+
+struct nft_xt_ctx_reg {
+	enum nft_ctx_reg_type type:8;
+
+	union {
+		struct {
+			uint32_t base;
+			uint32_t offset;
+			uint32_t len;
+		} payload;
+		struct {
+			uint32_t data[4];
+			uint8_t len;
+		} immediate;
+		struct {
+			uint32_t key;
+		} meta_dreg;
+		struct {
+			uint32_t key;
+		} meta_sreg;
+	};
+
+	struct {
+		uint32_t mask[4];
+		uint32_t xor[4];
+		bool set;
+	} bitwise;
+};
+
+struct nft_xt_ctx {
+	struct iptables_command_state *cs;
+	struct nftnl_expr_iter *iter;
+	struct nft_handle *h;
+	uint32_t flags;
+	const char *table;
+
+	struct nft_xt_ctx_reg regs[1 + 16];
+
+	const char *errmsg;
+};
+
+static inline struct nft_xt_ctx_reg *nft_xt_ctx_get_sreg(struct nft_xt_ctx *ctx, enum nft_registers reg)
+{
+	switch (reg) {
+	case NFT_REG_VERDICT:
+		return &ctx->regs[0];
+	case NFT_REG_1:
+		return &ctx->regs[1];
+	case NFT_REG_2:
+		return &ctx->regs[5];
+	case NFT_REG_3:
+		return &ctx->regs[9];
+	case NFT_REG_4:
+		return &ctx->regs[13];
+	case NFT_REG32_00...NFT_REG32_15:
+		return &ctx->regs[reg - NFT_REG32_00];
+	default:
+		ctx->errmsg = "Unknown register requested";
+		break;
+	}
+
+	return NULL;
+}
+
+static inline void nft_xt_reg_clear(struct nft_xt_ctx_reg *r)
+{
+	r->type = 0;
+	r->bitwise.set = false;
+}
+
+static inline struct nft_xt_ctx_reg *nft_xt_ctx_get_dreg(struct nft_xt_ctx *ctx, enum nft_registers reg)
+{
+	struct nft_xt_ctx_reg *r = nft_xt_ctx_get_sreg(ctx, reg);
+
+	if (r)
+		nft_xt_reg_clear(r);
+
+	return r;
+}
+
+struct nft_ruleparse_ops {
+	void (*meta)(struct nft_xt_ctx *ctx,
+		     const struct nft_xt_ctx_reg *sreg,
+		     struct nftnl_expr *e,
+		     struct iptables_command_state *cs);
+	void (*payload)(struct nft_xt_ctx *ctx,
+			const struct nft_xt_ctx_reg *sreg,
+			struct nftnl_expr *e,
+			struct iptables_command_state *cs);
+	void (*lookup)(struct nft_xt_ctx *ctx, struct nftnl_expr *e);
+	void (*match)(struct xtables_match *m,
+		      struct iptables_command_state *cs);
+	void (*target)(struct xtables_target *t,
+		       struct iptables_command_state *cs);
+};
+
+extern struct nft_ruleparse_ops nft_ruleparse_ops_arp;
+extern struct nft_ruleparse_ops nft_ruleparse_ops_bridge;
+extern struct nft_ruleparse_ops nft_ruleparse_ops_ipv4;
+extern struct nft_ruleparse_ops nft_ruleparse_ops_ipv6;
+
+void *nft_create_match(struct nft_xt_ctx *ctx,
+		       struct iptables_command_state *cs,
+		       const char *name, bool reuse);
+void *nft_create_target(struct nft_xt_ctx *ctx, const char *name);
+
+
+bool nft_rule_to_iptables_command_state(struct nft_handle *h,
+					const struct nftnl_rule *r,
+					struct iptables_command_state *cs);
+
+#define min(x, y) ((x) < (y) ? (x) : (y))
+#define max(x, y) ((x) > (y) ? (x) : (y))
+
+int parse_meta(struct nft_xt_ctx *ctx, struct nftnl_expr *e, uint8_t key,
+	       char *iniface, char *outiface, uint8_t *invflags);
+
+int nft_parse_hl(struct nft_xt_ctx *ctx, struct nftnl_expr *e,
+		 struct iptables_command_state *cs);
+
+#endif /* _NFT_RULEPARSE_H_ */