pex.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2022 Felix Fietkau <nbd@nbd.name>
   4  */
   5 #ifndef __UNETD_PEX_H
   6 #define __UNETD_PEX_H
   7
   8 #include <sys/socket.h>
   9 #include <libubox/uloop.h>
  10 #include "stun.h"
  11
  12 struct network;
  13
  14 struct network_pex_host {
  15         struct list_head list;
  16         uint64_t timeout;
  17         uint64_t last_active;
  18         uint64_t last_ping;
  19         union network_endpoint endpoint;
  20 };
  21
  22 struct network_pex {
  23         struct uloop_fd fd;
  24         struct list_head hosts;
  25         struct uloop_timeout request_update_timer;
  26 };
  27
  28 enum network_stun_state {
  29         STUN_STATE_IDLE,
  30         STUN_STATE_PEX_QUERY_WAIT,
  31         STUN_STATE_STUN_QUERY_SEND,
  32         STUN_STATE_STUN_QUERY_WAIT,
  33 };
  34
  35 struct network_stun_server {
  36         struct list_head list;
  37
  38         struct avl_node pending_node;
  39         struct stun_request req;
  40
  41         const char *host;
  42         uint8_t seq;
  43         bool req_auth_port;
  44         bool pending;
  45 };
  46
  47 struct network_stun {
  48         struct list_head servers;
  49         struct avl_tree pending;
  50
  51         struct uloop_timeout timer;
  52
  53         enum network_stun_state state;
  54         bool wgport_disabled;
  55
  56         uint16_t auth_port_ext;
  57         uint16_t port_local;
  58         uint16_t port_ext;
  59
  60         int retry;
  61
  62         struct uloop_fd socket;
  63 };
  64
  65 enum pex_event {
  66         PEX_EV_HANDSHAKE,
  67         PEX_EV_ENDPOINT_CHANGE,
  68         PEX_EV_QUERY,
  69         PEX_EV_PING,
  70 };
  71
  72 void network_pex_init(struct network *net);
  73 int network_pex_open(struct network *net);
  74 void network_pex_close(struct network *net);
  75 void network_pex_free(struct network *net);
  76
  77 void network_pex_event(struct network *net, struct network_peer *peer,
  78                        enum pex_event ev);
  79 void network_pex_create_host(struct network *net, union network_endpoint *ep,
  80                              unsigned int timeout);
  81
  82 void network_stun_init(struct network *net);
  83 void network_stun_free(struct network *net);
  84 void network_stun_server_add(struct network *net, const char *host);
  85 void network_stun_rx_packet(struct network *net, const void *data, size_t len);
  86 void network_stun_update_port(struct network *net, bool auth, uint16_t val);
  87 void network_stun_start(struct network *net);
  88
  89 static inline bool network_pex_active(struct network_pex *pex)
  90 {
  91         return pex->fd.fd >= 0;
  92 }
  93
  94 int global_pex_open(const char *unix_path);
  95
  96 #endif