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         union network_endpoint endpoint;
  19 };
  20
  21 struct network_pex {
  22         struct uloop_fd fd;
  23         struct list_head hosts;
  24         struct uloop_timeout request_update_timer;
  25 };
  26
  27 enum network_stun_state {
  28         STUN_STATE_IDLE,
  29         STUN_STATE_PEX_QUERY_WAIT,
  30         STUN_STATE_STUN_QUERY_SEND,
  31         STUN_STATE_STUN_QUERY_WAIT,
  32 };
  33
  34 struct network_stun_server {
  35         struct list_head list;
  36
  37         struct avl_node pending_node;
  38         struct stun_request req;
  39
  40         const char *host;
  41         uint8_t seq;
  42         bool req_auth_port;
  43         bool pending;
  44 };
  45
  46 struct network_stun {
  47         struct list_head servers;
  48         struct avl_tree pending;
  49
  50         struct uloop_timeout timer;
  51
  52         enum network_stun_state state;
  53         bool wgport_disabled;
  54
  55         uint16_t auth_port_ext;
  56         uint16_t port_local;
  57         uint16_t port_ext;
  58
  59         int retry;
  60
  61         struct uloop_fd socket;
  62 };
  63
  64 enum pex_event {
  65         PEX_EV_HANDSHAKE,
  66         PEX_EV_ENDPOINT_CHANGE,
  67         PEX_EV_QUERY,
  68         PEX_EV_PING,
  69 };
  70
  71 void network_pex_init(struct network *net);
  72 int network_pex_open(struct network *net);
  73 void network_pex_close(struct network *net);
  74 void network_pex_free(struct network *net);
  75
  76 void network_pex_event(struct network *net, struct network_peer *peer,
  77                        enum pex_event ev);
  78 void network_pex_create_host(struct network *net, union network_endpoint *ep,
  79                              unsigned int timeout);
  80
  81 void network_stun_init(struct network *net);
  82 void network_stun_free(struct network *net);
  83 void network_stun_server_add(struct network *net, const char *host);
  84 void network_stun_rx_packet(struct network *net, const void *data, size_t len);
  85 void network_stun_update_port(struct network *net, bool auth, uint16_t val);
  86 void network_stun_start(struct network *net);
  87
  88 static inline bool network_pex_active(struct network_pex *pex)
  89 {
  90         return pex->fd.fd >= 0;
  91 }
  92
  93 int global_pex_open(const char *unix_path);
  94
  95 #endif