mirror of
https://github.com/ntop/n2n.git
synced 2024-09-19 16:41:11 +02:00
92dfa67e22
1. Automatically assign IP addresses to the edge through the DHCP function that comes with sn, the default IP address pool is 172.17.12.0/24. 2. The -d parameter is added to sn, and the IP address pool of the embedded DHCP can be customized. 3. Now edge does not need to add -a and -s parameters to automatically obtain the IP address. 4. The IP automatically obtained by the cross-community edge can be the same, because the communities are isolated from each other and do not interfere with each other. 5. On the management side of sn (127.0.0.1:5645), you can now view the IP address of the tutap adapter of each edge. 6. Fix many bugs that have a certain chance of causing memory leaks. 7. Note: This version is not fully compatible with the previous version.
344 lines
12 KiB
C
344 lines
12 KiB
C
/**
|
|
* (C) 2007-20 - ntop.org and contributors
|
|
*
|
|
* 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 3 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 see see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
#if !defined( N2N_WIRE_H_ )
|
|
#define N2N_WIRE_H_
|
|
|
|
#include <stdlib.h>
|
|
#ifndef _MSC_VER
|
|
/* Not included in Visual Studio 2008 */
|
|
#include <stdint.h>
|
|
#endif
|
|
|
|
#define N2N_PKT_VERSION 2
|
|
#define N2N_DEFAULT_TTL 2 /* can be forwarded twice at most */
|
|
#define N2N_COMMUNITY_SIZE 16
|
|
#define N2N_MAC_SIZE 6
|
|
#define N2N_COOKIE_SIZE 4
|
|
#define N2N_PKT_BUF_SIZE 2048
|
|
#define N2N_SOCKBUF_SIZE 64 /* string representation of INET or INET6 sockets */
|
|
|
|
#define N2N_MULTICAST_PORT 1968
|
|
#define N2N_MULTICAST_GROUP "224.0.0.68"
|
|
|
|
typedef uint8_t n2n_community_t[N2N_COMMUNITY_SIZE];
|
|
typedef uint8_t n2n_mac_t[N2N_MAC_SIZE];
|
|
typedef uint8_t n2n_cookie_t[N2N_COOKIE_SIZE];
|
|
|
|
typedef char n2n_sock_str_t[N2N_SOCKBUF_SIZE]; /* tracing string buffer */
|
|
|
|
#if defined(WIN32)
|
|
#include "win32/n2n_win32.h"
|
|
#else /* #if defined(WIN32) */
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h> /* AF_INET and AF_INET6 */
|
|
#endif /* #if defined(WIN32) */
|
|
|
|
typedef enum n2n_pc
|
|
{
|
|
n2n_ping=0, /* Not used */
|
|
n2n_register=1, /* Register edge to edge */
|
|
n2n_deregister=2, /* Deregister this edge */
|
|
n2n_packet=3, /* PACKET data content */
|
|
n2n_register_ack=4, /* ACK of a registration from edge to edge */
|
|
n2n_register_super=5, /* Register edge to supernode */
|
|
n2n_register_super_ack=6, /* ACK from supernode to edge */
|
|
n2n_register_super_nak=7, /* NAK from supernode to edge - registration refused */
|
|
n2n_federation=8, /* Not used by edge */
|
|
n2n_peer_info=9, /* Send info on a peer from sn to edge */
|
|
n2n_query_peer=10 /* ask supernode for info on a peer */
|
|
} n2n_pc_t;
|
|
|
|
#define N2N_FLAGS_OPTIONS 0x0080
|
|
#define N2N_FLAGS_SOCKET 0x0040
|
|
#define N2N_FLAGS_FROM_SUPERNODE 0x0020
|
|
|
|
/* The bits in flag that are the packet type */
|
|
#define N2N_FLAGS_TYPE_MASK 0x001f /* 0 - 31 */
|
|
#define N2N_FLAGS_BITS_MASK 0xffe0
|
|
|
|
#define IPV4_SIZE 4
|
|
#define IPV6_SIZE 16
|
|
|
|
|
|
#define N2N_AUTH_TOKEN_SIZE 32 /* bytes */
|
|
|
|
|
|
#define N2N_EUNKNOWN -1
|
|
#define N2N_ENOTIMPL -2
|
|
#define N2N_EINVAL -3
|
|
#define N2N_ENOSPACE -4
|
|
|
|
typedef struct n2n_ip_subnet {
|
|
uint32_t net_addr; /* Host order IP address. */
|
|
uint8_t net_bitlen; /* Subnet prefix. */
|
|
} n2n_ip_subnet_t;
|
|
|
|
|
|
typedef struct n2n_sock
|
|
{
|
|
uint8_t family; /* AF_INET or AF_INET6; or 0 if invalid */
|
|
uint16_t port; /* host order */
|
|
union
|
|
{
|
|
uint8_t v6[IPV6_SIZE]; /* byte sequence */
|
|
uint8_t v4[IPV4_SIZE]; /* byte sequence */
|
|
} addr;
|
|
} n2n_sock_t;
|
|
|
|
typedef struct n2n_auth
|
|
{
|
|
uint16_t scheme; /* What kind of auth */
|
|
uint16_t toksize; /* Size of auth token */
|
|
uint8_t token[N2N_AUTH_TOKEN_SIZE]; /* Auth data interpreted based on scheme */
|
|
} n2n_auth_t;
|
|
|
|
typedef struct n2n_common
|
|
{
|
|
/* NOTE: wire representation is different! */
|
|
/* int version; */
|
|
|
|
uint8_t ttl;
|
|
uint8_t pc;
|
|
uint16_t flags;
|
|
n2n_community_t community;
|
|
} n2n_common_t;
|
|
|
|
typedef struct n2n_REGISTER
|
|
{
|
|
n2n_cookie_t cookie; /**< Link REGISTER and REGISTER_ACK */
|
|
n2n_mac_t srcMac; /**< MAC of registering party */
|
|
n2n_mac_t dstMac; /**< MAC of target edge */
|
|
n2n_sock_t sock; /**< REVISIT: unused? */
|
|
} n2n_REGISTER_t;
|
|
|
|
typedef struct n2n_REGISTER_ACK
|
|
{
|
|
n2n_cookie_t cookie; /**< Return cookie from REGISTER */
|
|
n2n_mac_t srcMac; /**< MAC of acknowledging party (supernode or edge) */
|
|
n2n_mac_t dstMac; /**< Reflected MAC of registering edge from REGISTER */
|
|
n2n_sock_t sock; /**< Supernode's view of edge socket (IP Addr, port) */
|
|
} n2n_REGISTER_ACK_t;
|
|
|
|
typedef struct n2n_PACKET
|
|
{
|
|
n2n_mac_t srcMac;
|
|
n2n_mac_t dstMac;
|
|
n2n_sock_t sock;
|
|
uint16_t transform;
|
|
uint16_t compression;
|
|
} n2n_PACKET_t;
|
|
|
|
/* Linked with n2n_register_super in n2n_pc_t. Only from edge to supernode. */
|
|
typedef struct n2n_REGISTER_SUPER {
|
|
n2n_cookie_t cookie; /**< Link REGISTER_SUPER and REGISTER_SUPER_ACK */
|
|
n2n_mac_t edgeMac; /**< MAC to register with edge sending socket */
|
|
n2n_ip_subnet_t dev_addr; /**< IP address of the tuntap adapter. */
|
|
n2n_auth_t auth; /**< Authentication scheme and tokens */
|
|
} n2n_REGISTER_SUPER_t;
|
|
|
|
|
|
/* Linked with n2n_register_super_ack in n2n_pc_t. Only from supernode to edge. */
|
|
typedef struct n2n_REGISTER_SUPER_ACK {
|
|
n2n_cookie_t cookie; /**< Return cookie from REGISTER_SUPER */
|
|
n2n_mac_t edgeMac; /**< MAC registered to edge sending socket */
|
|
n2n_ip_subnet_t dev_addr; /**< Assign an IP address to the tuntap adapter of edge. */
|
|
uint16_t lifetime; /**< How long the registration will live */
|
|
n2n_sock_t sock; /**< Sending sockets associated with edgeMac */
|
|
|
|
/** The packet format provides additional supernode definitions here.
|
|
* uint8_t count, then for each count there is one
|
|
* n2n_sock_t.
|
|
*/
|
|
uint8_t num_sn; /**< Number of supernodes that were send
|
|
* even if we cannot store them all. If
|
|
* non-zero then sn_bak is valid. */
|
|
n2n_sock_t sn_bak; /**< Socket of the first backup supernode */
|
|
} n2n_REGISTER_SUPER_ACK_t;
|
|
|
|
|
|
/* Linked with n2n_register_super_ack in n2n_pc_t. Only from supernode to edge. */
|
|
typedef struct n2n_REGISTER_SUPER_NAK
|
|
{
|
|
n2n_cookie_t cookie; /* Return cookie from REGISTER_SUPER */
|
|
} n2n_REGISTER_SUPER_NAK_t;
|
|
|
|
|
|
typedef struct n2n_PEER_INFO {
|
|
uint16_t aflags;
|
|
n2n_mac_t mac;
|
|
n2n_sock_t sock;
|
|
} n2n_PEER_INFO_t;
|
|
|
|
|
|
typedef struct n2n_QUERY_PEER
|
|
{
|
|
n2n_mac_t srcMac;
|
|
n2n_mac_t targetMac;
|
|
} n2n_QUERY_PEER_t;
|
|
|
|
typedef struct n2n_buf n2n_buf_t;
|
|
|
|
int encode_uint8( uint8_t * base,
|
|
size_t * idx,
|
|
const uint8_t v );
|
|
|
|
int decode_uint8( uint8_t * out,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_uint16( uint8_t * base,
|
|
size_t * idx,
|
|
const uint16_t v );
|
|
|
|
int decode_uint16( uint16_t * out,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_uint32( uint8_t * base,
|
|
size_t * idx,
|
|
const uint32_t v );
|
|
|
|
int decode_uint32( uint32_t * out,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_buf( uint8_t * base,
|
|
size_t * idx,
|
|
const void * p,
|
|
size_t s);
|
|
|
|
int decode_buf( uint8_t * out,
|
|
size_t bufsize,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_mac( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_mac_t m );
|
|
|
|
int decode_mac( uint8_t * out, /* of size N2N_MAC_SIZE. This clearer than passing a n2n_mac_t */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_common( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common );
|
|
|
|
int decode_common( n2n_common_t * out,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_sock( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_sock_t * sock );
|
|
|
|
int decode_sock( n2n_sock_t * sock,
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_REGISTER( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_REGISTER_t * reg );
|
|
|
|
int decode_REGISTER( n2n_REGISTER_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_REGISTER_SUPER( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_REGISTER_SUPER_t * reg );
|
|
|
|
int decode_REGISTER_SUPER( n2n_REGISTER_SUPER_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_REGISTER_ACK( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_REGISTER_ACK_t * reg );
|
|
|
|
int decode_REGISTER_ACK( n2n_REGISTER_ACK_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_REGISTER_SUPER_ACK( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * cmn,
|
|
const n2n_REGISTER_SUPER_ACK_t * reg );
|
|
|
|
int decode_REGISTER_SUPER_ACK( n2n_REGISTER_SUPER_ACK_t * reg,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int fill_sockaddr( struct sockaddr * addr,
|
|
size_t addrlen,
|
|
const n2n_sock_t * sock );
|
|
|
|
int encode_PACKET( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_PACKET_t * pkt );
|
|
|
|
int decode_PACKET( n2n_PACKET_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_PEER_INFO( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_PEER_INFO_t * pkt );
|
|
|
|
int decode_PEER_INFO( n2n_PEER_INFO_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
int encode_QUERY_PEER( uint8_t * base,
|
|
size_t * idx,
|
|
const n2n_common_t * common,
|
|
const n2n_QUERY_PEER_t * pkt );
|
|
|
|
int decode_QUERY_PEER( n2n_QUERY_PEER_t * pkt,
|
|
const n2n_common_t * cmn, /* info on how to interpret it */
|
|
const uint8_t * base,
|
|
size_t * rem,
|
|
size_t * idx );
|
|
|
|
#endif /* #if !defined( N2N_WIRE_H_ ) */
|