X-Git-Url: http://git.meshlink.io/?p=meshlink;a=blobdiff_plain;f=src%2Fnet.h;h=38727c28c31f8647930e268862898cf5eb38a62c;hp=d1dde61481101b71ba5873c4138199ba975d2feb;hb=963c5055505f2fc117cd5efa06eaa02c9b2bf85d;hpb=268c8545aaf83b7433f43402f5c77e39e20006ef diff --git a/src/net.h b/src/net.h index d1dde614..38727c28 100644 --- a/src/net.h +++ b/src/net.h @@ -1,7 +1,9 @@ +#ifndef MESHLINK_NET_H +#define MESHLINK_NET_H + /* net.h -- header for net.c - Copyright (C) 1998-2005 Ivo Timmermans - 2000-2012 Guus Sliepen + Copyright (C) 2014, 2017 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -18,161 +20,99 @@ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#ifndef __TINC_NET_H__ -#define __TINC_NET_H__ - -#include "ipv6.h" -#include "cipher.h" -#include "digest.h" +#include "event.h" +#include "sockaddr.h" +/* Maximum size of SPTPS payload */ #ifdef ENABLE_JUMBOGRAMS -#define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ +#define MTU 8951 /* 9000 bytes payload - 28 bytes IP+UDP header - 21 bytes SPTPS header+MAC */ #else -#define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ +#define MTU 1451 /* 1500 bytes payload - 28 bytes IP+UDP - 21 bytes SPTPS header+MAC */ #endif -#define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */ -#define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */ - -#define MAXSOCKETS 8 /* Probably overkill... */ - -typedef struct mac_t { - uint8_t x[6]; -} mac_t; - -typedef struct ipv4_t { - uint8_t x[4]; -} ipv4_t; +#define MINMTU 527 /* 576 minimum recommended Internet MTU - 28 bytes IP+UDP - 21 bytes SPTPS header+MAC */ -typedef struct ipv6_t { - uint16_t x[8]; -} ipv6_t; +/* MAXSIZE is the maximum size of an encapsulated packet */ +#define MAXSIZE (MTU + 64) -typedef short length_t; - -#define AF_UNKNOWN 255 - -struct sockaddr_unknown { - uint16_t family; - uint16_t pad1; - uint32_t pad2; - char *address; - char *port; -}; - -typedef union sockaddr_t { - struct sockaddr sa; - struct sockaddr_in in; - struct sockaddr_in6 in6; - struct sockaddr_unknown unknown; -#ifdef HAVE_STRUCT_SOCKADDR_STORAGE - struct sockaddr_storage storage; -#endif -} sockaddr_t; - -#ifdef SA_LEN -#define SALEN(s) SA_LEN(&s) -#else -#define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6)) -#endif +/* MAXBUFSIZE is the maximum size of a request: enough for a base64 encoded MAXSIZEd packet plus request header */ +#define MAXBUFSIZE ((MAXSIZE * 8) / 6 + 128) typedef struct vpn_packet_t { - length_t len; /* the actual number of bytes in the `data' field */ - int priority; /* priority or TOS */ - uint32_t seqno; /* 32 bits sequence number (network byte order of course) */ + uint16_t probe: 1; + int16_t tcp: 1; + uint16_t len; /* the actual number of bytes in the `data' field */ uint8_t data[MAXSIZE]; } vpn_packet_t; -typedef struct listen_socket_t { - struct event ev_tcp; - struct event ev_udp; - int tcp; - int udp; - sockaddr_t sa; -} listen_socket_t; +/* Packet types when using SPTPS */ + +#define PKT_COMPRESSED 1 +#define PKT_PROBE 4 + +typedef enum packet_type_t { + PACKET_NORMAL, + PACKET_COMPRESSED, + PACKET_PROBE +} packet_type_t; #include "conf.h" #include "list.h" typedef struct outgoing_t { - char *name; + struct node_t *node; + enum { + OUTGOING_START, + OUTGOING_CANONICAL, + OUTGOING_RECENT, + OUTGOING_KNOWN, + OUTGOING_END, + OUTGOING_NO_KNOWN_ADDRESSES, + } state; int timeout; - struct config_t *cfg; + timeout_t ev; struct addrinfo *ai; struct addrinfo *aip; - struct event ev; } outgoing_t; -extern list_t *outgoing_list; - -extern int maxoutbufsize; -extern int seconds_till_retry; -extern int addressfamily; -extern unsigned replaywin; -extern bool localdiscovery; - -extern listen_socket_t listen_socket[MAXSOCKETS]; -extern int listen_sockets; -extern int keylifetime; -extern int udp_rcvbuf; -extern int udp_sndbuf; -extern bool do_prune; -extern char *myport; -extern int contradicting_add_edge; -extern int contradicting_del_edge; - -extern char *proxyhost; -extern char *proxyport; -extern char *proxyuser; -extern char *proxypass; -typedef enum proxytype_t { - PROXY_NONE = 0, - PROXY_SOCKS4, - PROXY_SOCKS4A, - PROXY_SOCKS5, - PROXY_HTTP, - PROXY_EXEC, -} proxytype_t; -extern proxytype_t proxytype; - /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */ #include "connection.h" #include "node.h" -extern void retry_outgoing(outgoing_t *); -extern void handle_incoming_vpn_data(int, short, void *); -extern void finish_connecting(struct connection_t *); -extern bool do_outgoing_connection(struct connection_t *); -extern void handle_new_meta_connection(int, short, void *); -extern int setup_listen_socket(const sockaddr_t *); -extern int setup_vpn_in_socket(const sockaddr_t *); -extern void send_packet(struct node_t *, vpn_packet_t *); -extern void receive_tcppacket(struct connection_t *, const char *, int); -extern void broadcast_packet(const struct node_t *, vpn_packet_t *); -extern char *get_name(void); -extern bool setup_network(void); -extern void setup_outgoing_connection(struct outgoing_t *); -extern void try_outgoing_connections(void); -extern void close_network_connections(void); -extern int main_loop(void); -extern void terminate_connection(struct connection_t *, bool); -extern void flush_queue(struct node_t *); -extern bool node_read_ecdsa_public_key(struct node_t *); -extern bool read_ecdsa_public_key(struct connection_t *); -extern bool read_rsa_public_key(struct connection_t *); -extern void send_mtu_probe(struct node_t *); -extern void handle_device_data(int, short, void *); -extern void handle_meta_connection_data(int, short, void *); -extern void regenerate_key(void); -extern void purge(void); -extern void retry(void); -extern int reload_configuration(void); -extern void load_all_subnets(void); +extern void init_outgoings(struct meshlink_handle *mesh); +extern void exit_outgoings(struct meshlink_handle *mesh); + +extern void retry_outgoing(struct meshlink_handle *mesh, outgoing_t *); +extern void handle_incoming_vpn_data(struct event_loop_t *loop, void *, int); +extern void finish_connecting(struct meshlink_handle *mesh, struct connection_t *); +extern void do_outgoing_connection(struct meshlink_handle *mesh, struct outgoing_t *); +extern void handle_new_meta_connection(struct event_loop_t *loop, void *, int); +extern int setup_tcp_listen_socket(struct meshlink_handle *mesh, const struct addrinfo *aip) __attribute__((__warn_unused_result__)); +extern int setup_udp_listen_socket(struct meshlink_handle *mesh, const struct addrinfo *aip) __attribute__((__warn_unused_result__)); +extern bool send_sptps_data(void *handle, uint8_t type, const void *data, size_t len); +extern bool receive_sptps_record(void *handle, uint8_t type, const void *data, uint16_t len) __attribute__((__warn_unused_result__)); +extern void send_packet(struct meshlink_handle *mesh, struct node_t *, struct vpn_packet_t *); +extern char *get_name(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern void load_all_nodes(struct meshlink_handle *mesh); +extern bool setup_myself_reloadable(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern bool setup_network(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern void reset_outgoing(struct outgoing_t *); +extern void setup_outgoing_connection(struct meshlink_handle *mesh, struct outgoing_t *); +extern void close_network_connections(struct meshlink_handle *mesh); +extern void main_loop(struct meshlink_handle *mesh); +extern void terminate_connection(struct meshlink_handle *mesh, struct connection_t *, bool); +extern bool node_read_public_key(struct meshlink_handle *mesh, struct node_t *) __attribute__((__warn_unused_result__)); +extern bool node_read_from_config(struct meshlink_handle *mesh, struct node_t *, const config_t *config) __attribute__((__warn_unused_result__)); +extern bool read_ecdsa_public_key(struct meshlink_handle *mesh, struct connection_t *) __attribute__((__warn_unused_result__)); +extern bool read_ecdsa_private_key(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern bool node_write_config(struct meshlink_handle *mesh, struct node_t *) __attribute__((__warn_unused_result__)); +extern void send_mtu_probe(struct meshlink_handle *mesh, struct node_t *); +extern void handle_meta_connection_data(struct meshlink_handle *mesh, struct connection_t *); +extern void retry(struct meshlink_handle *mesh); +extern int check_port(struct meshlink_handle *mesh); #ifndef HAVE_MINGW #define closesocket(s) close(s) -#else -extern CRITICAL_SECTION mutex; #endif -#endif /* __TINC_NET_H__ */ +#endif