evgeny
38c9f229bc
- u_async.c: process immediate_queue BEFORE epoll_wait in uasync_poll - stcp_link.c: defensive NULL etcp_conn/etcp_link in stcp_link_close - utun_instance.c: move stcp_server_list_destroy_all to Phase J (before ETCP), add deferred drain in both Phase J and L - stcp.h/c: STCP_HS_ENC_CLIENT 6→38, STCP_HS_ENC_SERVER 7→39, exchange ed25519_pubkey in both handshake directions - etcp_connections.c: copy peer_ed25519 from STCP to ETCP_CONN in etcp_link_enter_ready_tcp; guard link->etcp in tcp_link_close_cb - chat_sync.c: fix lk->conn NULL dereference for TCP links - test_stcp.c: update stcp_server_create/stcp_client_connect callsites - tools/chat_tcp_test: change transport udp→tcp
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#ifndef EIM_NAT_H
|
|
#define EIM_NAT_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
struct ETCP_CONN;
|
|
|
|
#define EIM_NAT_TABLE_SIZE 65536
|
|
|
|
#define EIM_NAT_ENTRY_FREE 0
|
|
#define EIM_NAT_ENTRY_ACTIVE 1
|
|
#define EIM_NAT_ENTRY_STATIC 2
|
|
|
|
#define IPPROTO_TCP_UINT8 6
|
|
#define IPPROTO_UDP_UINT8 17
|
|
#define IPPROTO_ICMP_UINT8 1
|
|
|
|
struct eim_nat_entry {
|
|
uint32_t internal_ip;
|
|
uint16_t internal_port;
|
|
uint8_t proto;
|
|
uint8_t state;
|
|
uint64_t src_node_id; // which node sent the original packet
|
|
uint64_t last_seen;
|
|
struct ETCP_CONN* src_conn; // cached connection for sendback
|
|
};
|
|
|
|
// Pure NAT engine state (no transport/TUN/ETCP fields)
|
|
struct eim_nat_ctx {
|
|
uint32_t gateway_ip;
|
|
uint16_t port_start;
|
|
uint16_t port_end;
|
|
uint16_t next_port;
|
|
struct eim_nat_entry* table;
|
|
size_t table_size;
|
|
int initialized;
|
|
};
|
|
|
|
struct global_config;
|
|
|
|
int eim_nat_init_ctx(struct eim_nat_ctx* ctx, const struct global_config* g);
|
|
void eim_nat_destroy_ctx(struct eim_nat_ctx* ctx);
|
|
|
|
int eim_nat_egress(struct eim_nat_ctx* ctx, uint8_t* ip_data, size_t ip_len,
|
|
uint64_t src_node_id, struct ETCP_CONN* src_conn);
|
|
int eim_nat_ingress(struct eim_nat_ctx* ctx, uint8_t* ip_data, size_t ip_len,
|
|
struct eim_nat_entry** out_entry);
|
|
|
|
int eim_nat_add_forward(struct eim_nat_ctx* ctx, uint8_t proto,
|
|
uint32_t internal_ip_host, uint16_t internal_port_net,
|
|
uint16_t external_port);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|