/* net.h -- header for net.c Copyright (C) 1998-2005 Ivo Timmermans 2000-2014 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 the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 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., 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" #ifdef ENABLE_JUMBOGRAMS #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ #else #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ #endif /* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + srcid + dstid + padding + HMAC + compressor overhead */ #define MAXSIZE (MTU + 4 + sizeof(node_id_t) + sizeof(node_id_t) + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20) /* MAXBUFSIZE is the maximum size of a request: enough for a MAXSIZEd packet or a 8192 bits RSA key */ #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) #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; typedef struct ipv6_t { uint16_t x[8]; } ipv6_t; typedef struct node_id_t { uint8_t x[6]; } node_id_t; typedef short length_t; typedef uint32_t seqno_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 #define SEQNO(x) ((x)->data + (x)->offset - 4) #define SRCID(x) ((node_id_t *)((x)->data + (x)->offset - 6)) #define DSTID(x) ((node_id_t *)((x)->data + (x)->offset - 12)) #define DATA(x) ((x)->data + (x)->offset) #define DEFAULT_PACKET_OFFSET 12 typedef struct vpn_packet_t { length_t len; /* The actual number of valid bytes in the `data' field (including seqno or dstid/srcid) */ length_t offset; /* Offset in the buffer where the packet data starts (righter after seqno or dstid/srcid) */ int priority; /* priority or TOS */ uint8_t data[MAXSIZE]; } vpn_packet_t; /* Packet types when using SPTPS */ #define PKT_COMPRESSED 1 #define PKT_MAC 2 #define PKT_PROBE 4 typedef enum packet_type_t { PACKET_NORMAL, PACKET_COMPRESSED, PACKET_PROBE } packet_type_t; typedef struct listen_socket_t { io_t tcp; io_t udp; sockaddr_t sa; bool bindto; } listen_socket_t; #include "conf.h" #include "list.h" typedef struct outgoing_t { char *name; int timeout; splay_tree_t *config_tree; struct config_t *cfg; struct addrinfo *ai; struct addrinfo *aip; timeout_t 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 bool udp_discovery; extern int udp_discovery_keepalive_interval; extern int udp_discovery_interval; extern int udp_discovery_timeout; extern int mtu_info_interval; extern int udp_info_interval; extern listen_socket_t listen_socket[MAXSOCKETS]; extern int listen_sockets; extern io_t unix_socket; extern int keylifetime; extern int udp_rcvbuf; extern int udp_sndbuf; extern int max_connection_burst; extern bool do_prune; extern char *myport; extern bool device_standby; extern bool autoconnect; extern bool disablebuggypeers; extern int contradicting_add_edge; extern int contradicting_del_edge; extern time_t last_config_check; 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; extern char *scriptinterpreter; extern char *scriptextension; /* 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(void *, int); extern void finish_connecting(struct connection_t *); extern bool do_outgoing_connection(struct outgoing_t *); extern void handle_new_meta_connection(void *, int); extern void handle_new_unix_connection(void *, int); extern int setup_listen_socket(const sockaddr_t *); extern int setup_vpn_in_socket(const sockaddr_t *); extern bool send_sptps_data(node_t *to, node_t *from, int type, const void *data, size_t len); extern bool receive_sptps_record(void *handle, uint8_t type, const void *data, uint16_t len); extern void send_packet(struct node_t *, vpn_packet_t *); extern void receive_tcppacket(struct connection_t *, const char *, int); extern bool receive_tcppacket_sptps(struct connection_t *, const char *, int); extern void broadcast_packet(const struct node_t *, vpn_packet_t *); extern char *get_name(void); extern void device_enable(void); extern void device_disable(void); extern bool setup_myself_reloadable(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 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 handle_device_data(void *, int); extern void handle_meta_connection_data(struct connection_t *); 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 load_all_nodes(void); extern void try_tx(struct node_t *n, bool); #ifndef HAVE_MINGW #define closesocket(s) close(s) #endif #endif /* __TINC_NET_H__ */