X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet.h;h=38727c28c31f8647930e268862898cf5eb38a62c;hb=aab092bf87b3f113499ba40802ad21f855c607e5;hp=af13036381cf72a1fe679e50627c5f6214e1fb60;hpb=1243156a5e03a666b36bc4400f1402243a85c9a7;p=meshlink diff --git a/src/net.h b/src/net.h index af130363..38727c28 100644 --- a/src/net.h +++ b/src/net.h @@ -1,6 +1,9 @@ +#ifndef MESHLINK_NET_H +#define MESHLINK_NET_H + /* net.h -- header for net.c - Copyright (C) 1998,99 Ivo Timmermans + 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 @@ -12,128 +15,104 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#ifndef __TINC_NET_H__ -#define __TINC_NET_H__ +#include "event.h" +#include "sockaddr.h" -#include +/* Maximum size of SPTPS payload */ +#ifdef ENABLE_JUMBOGRAMS +#define MTU 8951 /* 9000 bytes payload - 28 bytes IP+UDP header - 21 bytes SPTPS header+MAC */ +#else +#define MTU 1451 /* 1500 bytes payload - 28 bytes IP+UDP - 21 bytes SPTPS header+MAC */ +#endif -#include "config.h" -#include "conf.h" +#define MINMTU 527 /* 576 minimum recommended Internet MTU - 28 bytes IP+UDP - 21 bytes SPTPS header+MAC */ -#define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */ -#define MTU 1600 +/* MAXSIZE is the maximum size of an encapsulated packet */ +#define MAXSIZE (MTU + 64) -#define MAX_PASSPHRASE_SIZE 2000 /* 2kb is really waaaay too much. nobody's - gonna need a 16 kbit passphrase */ +/* MAXBUFSIZE is the maximum size of a request: enough for a base64 encoded MAXSIZEd packet plus request header */ +#define MAXBUFSIZE ((MAXSIZE * 8) / 6 + 128) -#define MAC_ADDR_S "%02x:%02x:%02x:%02x:%02x:%02x" -#define MAC_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \ - ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3], \ - ((unsigned char*)&(x))[4],((unsigned char*)&(x))[5] +typedef struct vpn_packet_t { + 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; -#define IP_ADDR_S "%d.%d.%d.%d" +/* Packet types when using SPTPS */ -#ifdef WORDS_BIGENDIAN -# define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \ - ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3] -#else -# define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \ - ((unsigned char*)&(x))[1],((unsigned char*)&(x))[0] -#endif +#define PKT_COMPRESSED 1 +#define PKT_PROBE 4 -typedef unsigned long ip_t; -typedef short length_t; +typedef enum packet_type_t { + PACKET_NORMAL, + PACKET_COMPRESSED, + PACKET_PROBE +} packet_type_t; -typedef struct vpn_packet_t { - length_t len; /* the actual number of bytes in the `data' field */ - unsigned char data[MAXSIZE]; -} vpn_packet_t; +#include "conf.h" +#include "list.h" + +typedef struct outgoing_t { + struct node_t *node; + enum { + OUTGOING_START, + OUTGOING_CANONICAL, + OUTGOING_RECENT, + OUTGOING_KNOWN, + OUTGOING_END, + OUTGOING_NO_KNOWN_ADDRESSES, + } state; + int timeout; + timeout_t ev; + struct addrinfo *ai; + struct addrinfo *aip; +} outgoing_t; + +/* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */ +#include "connection.h" +#include "node.h" + +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) +#endif -typedef struct real_packet_t { - length_t len; /* the length of the entire packet */ - ip_t from; /* where the packet came from */ - vpn_packet_t data; /* encrypted vpn_packet_t */ -} real_packet_t; - -typedef struct passphrase_t { - unsigned char type; - unsigned short len; - unsigned char phrase[MAX_PASSPHRASE_SIZE]; -} passphrase_t; - -typedef struct status_bits_t { - int pinged:1; /* sent ping */ - int got_pong:1; /* received pong */ - int meta:1; /* meta connection exists */ - int active:1; /* 1 if active.. */ - int outgoing:1; /* I myself asked for this conn */ - int termreq:1; /* the termination of this connection was requested */ - int remove:1; /* Set to 1 if you want this connection removed */ - int timeout:1; /* 1 if gotten timeout */ - int validkey:1; /* 1 if we currently have a valid key for him */ - int waitingforkey:1; /* 1 if we already sent out a request */ - int dataopen:1; /* 1 if we have a valid UDP connection open */ - int unused:22; -} status_bits_t; - -typedef struct queue_element_t { - void *packet; - struct queue_element_t *next; -} queue_element_t; - -typedef struct packet_queue_t { - queue_element_t *head; - queue_element_t *tail; -} packet_queue_t; - -typedef struct enc_key_t { - int length; - char *key; - time_t expiry; -} enc_key_t; - -typedef struct conn_list_t { - ip_t vpn_ip; /* his vpn ip */ - ip_t vpn_mask; /* his vpn network address */ - ip_t real_ip; /* his real (internet) ip */ - char *hostname; /* the hostname of its real ip */ - short int port; /* his portnumber */ - int socket; /* our udp vpn socket */ - int meta_socket; /* our tcp meta socket */ - unsigned char protocol_version; /* used protocol */ - status_bits_t status; /* status info */ - passphrase_t *pp; /* encoded passphrase */ - packet_queue_t *sq; /* pending outgoing packets */ - packet_queue_t *rq; /* pending incoming packets (they have no - valid key to be decrypted with) */ - enc_key_t *public_key; /* the other party's public key */ - enc_key_t *key; /* encrypt with this key */ - struct conn_list_t *nexthop; /* nearest meta-hop in this direction */ - struct conn_list_t *next; /* after all, it's a list of connections */ -} conn_list_t; - -extern int tap_fd; - -extern int total_tap_in; -extern int total_tap_out; -extern int total_socket_in; -extern int total_socket_out; - -extern conn_list_t *conn_list; -extern conn_list_t *myself; - -extern int send_packet(ip_t, vpn_packet_t *); -extern int send_broadcast(conn_list_t *, vpn_packet_t *); -extern int setup_network_connections(void); -extern void close_network_connections(void); -extern void main_loop(void); -extern int setup_vpn_connection(conn_list_t *); -extern void terminate_connection(conn_list_t *); -extern void flush_queues(conn_list_t*); - -#endif /* __TINC_NET_H__ */ +#endif