+#ifndef MESHLINK_NET_H
+#define MESHLINK_NET_H
+
/*
net.h -- header for net.c
- Copyright (C) 1998-2002 Ivo Timmermans <zarq@iname.com>
- 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
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
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.
-
- $Id: net.h,v 1.9.4.40 2002/02/20 22:15:32 guus Exp $
+ 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 <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <sys/time.h>
+#include "event.h"
+#include "sockaddr.h"
-#include "config.h"
+/* 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
-#define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
-#define MAXSIZE 1600 /* MTU + header (seqno) and trailer (CBC padding and HMAC) */
+#define MINMTU 527 /* 576 minimum recommended Internet MTU - 28 bytes IP+UDP - 21 bytes SPTPS header+MAC */
-#define MAXBUFSIZE 2048 /* Probably way too much, but it must fit every possible request. */
+/* MAXSIZE is the maximum size of an encapsulated packet */
+#define MAXSIZE (MTU + 64)
-typedef struct mac_t
-{
- unsigned char x[6];
-} mac_t;
+/* 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 ipv4_t
-{
- unsigned char x[4];
-} ipv4_t;
+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;
-typedef struct ip_mask_t {
- ipv4_t address;
- ipv4_t mask;
-} ip_mask_t;
+/* Packet types when using SPTPS */
-typedef struct ipv6_t
-{
- unsigned short x[8];
-} ipv6_t;
+#define PKT_COMPRESSED 1
+#define PKT_PROBE 4
-typedef unsigned short port_t;
+typedef enum packet_type_t {
+ PACKET_NORMAL,
+ PACKET_COMPRESSED,
+ PACKET_PROBE
+} packet_type_t;
-typedef short length_t;
+#include "conf.h"
+#include "list.h"
-typedef union {
- struct sockaddr sa;
- struct sockaddr_in in;
- struct sockaddr_in6 in6;
-} sockaddr_t;
+typedef struct outgoing_t {
+ struct node_t *node;
+ enum {
+ OUTGOING_START,
+ OUTGOING_CANONICAL_RESOLVE,
+ 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;
-#define SA_PORT(s) ((s.sa.sa_family==AF_INET)?s.in.sin_port:(s.sa.sa_family==AF_INET6)?s.in6.sin6_port:0)
+/* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
+#include "connection.h"
+#include "node.h"
-#ifdef HAVE_LINUX
- #define SA_LEN(s) sizeof(sockaddr_t)
-#else
- #define SA_LEN(s) (s.sa_len)
+extern void init_outgoings(struct meshlink_handle *mesh);
+extern void exit_outgoings(struct meshlink_handle *mesh);
+#ifdef HAVE_RECVMMSG
+extern void init_mmsg(struct meshlink_handle *mesh);
+extern void exit_mmsg(struct meshlink_handle *mesh);
#endif
-typedef struct vpn_packet_t {
- length_t len; /* the actual number of bytes in the `data' field */
- unsigned int seqno; /* 32 bits sequence number (network byte order of course) */
- unsigned char data[MAXSIZE];
-} vpn_packet_t;
-
-typedef struct queue_element_t {
- void *packet;
- struct queue_element_t *prev;
- 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 outgoing_t {
- char *name;
- int timeout;
- struct config_t *cfg;
- struct addrinfo *ai;
- struct addrinfo *aip;
-} outgoing_t;
+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
-extern int maxtimeout;
-extern int seconds_till_retry;
-extern int addressfamily;
-
-extern char *request_name[];
-extern char *status_text[];
-
-#include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
-
-extern int tcp_socket;
-extern int udp_socket;
-extern int keyexpires;
-extern int keylifetime;
-extern int do_prune;
-extern int do_purge;
-extern char *myport;
-
-extern void retry_outgoing(outgoing_t *);
-extern void handle_incoming_vpn_data(void);
-extern void finish_connecting(connection_t *);
-extern void do_outgoing_connection(connection_t *);
-extern int handle_new_meta_connection(void);
-extern int setup_listen_socket(sockaddr_t *);
-extern int setup_vpn_in_socket(sockaddr_t *);
-extern void send_packet(struct node_t *, vpn_packet_t *);
-extern void receive_packet(struct node_t *, vpn_packet_t *);
-extern void receive_tcppacket(struct connection_t *, char *, int);
-extern void broadcast_packet(struct node_t *, vpn_packet_t *);
-extern int setup_network_connections(void);
-extern void setup_outgoing_connection(struct outgoing_t *);
-extern void try_outgoing_connections(void);
-extern void close_network_connections(void);
-extern void main_loop(void);
-extern void terminate_connection(connection_t *, int);
-extern void flush_queue(struct node_t *);
-extern int read_rsa_public_key(struct connection_t *);
-
-#endif /* __TINC_NET_H__ */
+#endif