X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.h;h=5b14553856ef52e8ffd890a380cbb6a5078e4036;hp=eb7ad7eaba2ccae94ed6cf4b77339af9bb275626;hb=af86a3226ea42375644b3f99c182c778d327de1e;hpb=82e383710980534d38bb9a8ef22f20677cd85861 diff --git a/src/net.h b/src/net.h index eb7ad7ea..5b145538 100644 --- a/src/net.h +++ b/src/net.h @@ -1,7 +1,7 @@ /* net.h -- header for net.c - Copyright (C) 1998-2001 Ivo Timmermans - 2000,2001 Guus Sliepen + Copyright (C) 1998-2003 Ivo Timmermans + 2000-2003 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 @@ -17,96 +17,143 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: net.h,v 1.9.4.35 2001/10/27 12:13:17 guus Exp $ + $Id: net.h,v 1.9.4.73 2003/12/20 19:47:52 guus Exp $ */ #ifndef __TINC_NET_H__ #define __TINC_NET_H__ -#include +#include -#include "config.h" +#include "ipv6.h" -#define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */ -#define MTU 1600 -#define SALTLEN 2 /* to spice things up for the NSA... */ - -#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] - -#define IP_ADDR_S "%d.%d.%d.%d" - -#ifdef WORDS_BIGENDIAN -# define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \ - ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3] +#ifdef ENABLE_JUMBOGRAMS +#define MTU 9014 /* 9000 bytes payload + 14 bytes ethernet header */ #else -# define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \ - ((unsigned char*)&(x))[1],((unsigned char*)&(x))[0] +#define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */ #endif -#define MAXBUFSIZE 4096 /* Probably way too much, but it must fit every possible request. */ +#define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_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 */ -/* tap types */ -#define TAP_TYPE_ETHERTAP 0 -#define TAP_TYPE_TUNTAP 1 +#define MAXSOCKETS 128 /* Overkill... */ -typedef struct mac_t -{ - unsigned char x[6]; -} mac_t; +#define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */ -typedef unsigned long ipv4_t; +typedef struct mac_t { + uint8_t x[6]; +} mac_t; -typedef struct ip_mask_t { - ipv4_t address; - ipv4_t mask; -} ip_mask_t; +typedef struct ipv4_t { + uint8_t x[4]; +} ipv4_t; -typedef struct ipv6_t -{ - unsigned short x[8]; +typedef struct ipv6_t { + uint16_t x[8]; } ipv6_t; -typedef unsigned short port_t; - 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 + typedef struct vpn_packet_t { - length_t len; /* the actual number of bytes in the `data' field */ - unsigned char salt[SALTLEN]; /* two bytes of randomness */ - unsigned char data[MAXSIZE]; + 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) */ + uint8_t data[MAXSIZE]; } vpn_packet_t; typedef struct queue_element_t { - void *packet; - struct queue_element_t *prev; - struct queue_element_t *next; + 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; + queue_element_t *head; + queue_element_t *tail; } packet_queue_t; -extern int seconds_till_retry; +typedef struct listen_socket_t { + int tcp; + int udp; + sockaddr_t sa; +} listen_socket_t; -extern char *request_name[256]; -extern char *status_text[10]; +#include "conf.h" -#include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */ +typedef struct outgoing_t { + char *name; + int timeout; + struct config_t *cfg; + struct addrinfo *ai; + struct addrinfo *aip; +} outgoing_t; -extern void send_packet(struct node_t *, vpn_packet_t *); -extern void receive_packet(struct node_t *, vpn_packet_t *); +extern int maxtimeout; +extern int seconds_till_retry; +extern int addressfamily; + +extern listen_socket_t listen_socket[MAXSOCKETS]; +extern int listen_sockets; +extern int keyexpires; +extern int keylifetime; +extern bool do_prune; +extern bool do_purge; +extern char *myport; +extern time_t now; +extern EVP_CIPHER_CTX packet_ctx; + +/* 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); +extern void finish_connecting(struct connection_t *); +extern void do_outgoing_connection(struct connection_t *); +extern bool handle_new_meta_connection(int); +extern int setup_listen_socket(const sockaddr_t *); +extern int setup_vpn_in_socket(const sockaddr_t *); +extern void send_packet(const 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 broadcast_packet(const struct node_t *, vpn_packet_t *); +extern bool 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 int main_loop(void); +extern void terminate_connection(struct connection_t *, bool); extern void flush_queue(struct node_t *); -extern int read_rsa_public_key(struct connection_t *); -extern RETSIGTYPE try_outgoing_connections(int); +extern bool read_rsa_public_key(struct connection_t *); +extern void send_mtu_probe(struct node_t *); + +#ifndef HAVE_MINGW +#define closesocket(s) close(s) +#endif -#endif /* __TINC_NET_H__ */ +#endif /* __TINC_NET_H__ */