mirror of
https://github.com/ntop/n2n.git
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177 lines
7.7 KiB
C
177 lines
7.7 KiB
C
/**
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* (C) 2007-20 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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/* N2N packet header indicators. */
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#define MSG_TYPE_REGISTER 1
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#define MSG_TYPE_DEREGISTER 2
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#define MSG_TYPE_PACKET 3
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#define MSG_TYPE_REGISTER_ACK 4
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#define MSG_TYPE_REGISTER_SUPER 5
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#define MSG_TYPE_UNREGISTER_SUPER 6
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#define MSG_TYPE_REGISTER_SUPER_ACK 7
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#define MSG_TYPE_REGISTER_SUPER_NAK 8
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#define MSG_TYPE_FEDERATION 9
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#define MSG_TYPE_PEER_INFO 10
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#define MSG_TYPE_QUERY_PEER 11
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#define MSG_TYPE_MAX_TYPE 11
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/* Max available space to add supernodes' informations (sockets and MACs) in REGISTER_SUPER_ACK
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* Field sizes of REGISTER_SUPER_ACK as used in encode/decode fucntions in src/wire.c
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* REVISIT: replace 255 by DEFAULT_MTU as soon as header encryption allows for longer packets to be encrypted. */
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#define REG_SUPER_ACK_PAYLOAD_SPACE (255 - (sizeof(n2n_common_t) + sizeof(n2n_REGISTER_SUPER_ACK_t)))
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/* Space needed to store socket and MAC address of a supernode */
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#define REG_SUPER_ACK_PAYLOAD_ENTRY_SIZE (sizeof(n2n_REGISTER_SUPER_ACK_payload_t))
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#define PURGE_REGISTRATION_FREQUENCY 30
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#define RE_REG_AND_PURGE_FREQUENCY 10
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#define REGISTRATION_TIMEOUT 60
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#define SOCKET_TIMEOUT_INTERVAL_SECS 10
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#define REGISTER_SUPER_INTERVAL_DFL 20 /* sec, usually UDP NAT entries in a firewall expire after 30 seconds */
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#define SWEEP_TIME 30 /* sec, indicates the value after which we have to sort the hash list of supernodes in edges
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* and when we send out packets to query selection-relevant informations from supernodes. */
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/* Timeouts used in re_register_and_purge_supernodes. LAST_SEEN_SN_ACTIVE and LAST_SEEN_SN_INACTIVE
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* values should be at least 3*SOCKET_TIMEOUT_INTERVAL_SECS apart. */
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#define LAST_SEEN_SN_ACTIVE 20 /* sec, indicates supernodes that are proven to be active */
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#define LAST_SEEN_SN_INACTIVE 90 /* sec, indicates supernodes that are proven to be inactive: they will be purged */
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#define LAST_SEEN_SN_NEW (LAST_SEEN_SN_INACTIVE - LAST_SEEN_SN_ACTIVE) / 2 /* sec, indicates supernodes with unsure status, must be tested to check if they are active */
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#define IFACE_UPDATE_INTERVAL (30) /* sec. How long it usually takes to get an IP lease. */
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#define TRANSOP_TICK_INTERVAL (10) /* sec */
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#define SORT_COMMUNITIES_INTERVAL 90 /* sec. until supernode sorts communities' hash list again */
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#define ETH_FRAMESIZE 14
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#define IP4_SRCOFFSET 12
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#define IP4_DSTOFFSET 16
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#define IP4_MIN_SIZE 20
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#define UDP_SIZE 8
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/* parameters for replay protection */
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#define TIME_STAMP_FRAME 0x0000001000000000LL /* clocks of different computers are allowed +/- 16 seconds to be off */
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#define TIME_STAMP_JITTER 0x0000000027100000LL /* we allow a packet to arrive 160 ms (== 0x27100 us) before another
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* set to 0x0000000000000000LL if increasing (or equal) time stamps allowed only */
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#define TIME_STAMP_ALLOW_JITTER 1 /* constant for allowing or... */
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#define TIME_STAMP_NO_JITTER 0 /* not allowing jitter to be considered */
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/* N2N compression indicators. */
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/* Compression is disabled by default for outgoing packets if no cli
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* option is given. All edges are built with decompression support so
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* they are able to understand each other (this applies to lzo only). */
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#define N2N_COMPRESSION_ID_INVALID 0
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#define N2N_COMPRESSION_ID_NONE 1 /* default, see edge_init_conf_defaults(...) in edge_utils.c */
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#define N2N_COMPRESSION_ID_LZO 2 /* set if '-z1' or '-z' cli option is present, see setOption(...) in edge.c */
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#define N2N_COMPRESSION_ID_ZSTD 3 /* set if '-z2' cli option is present, available only if compiled with zstd lib */
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#define ZSTD_COMPRESSION_LEVEL 7 /* 1 (faster) ... 22 (more compression) */
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/* Federation name and indicators */
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#define FEDERATION_NAME "*Federation"
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enum federation{IS_NO_FEDERATION = 0,IS_FEDERATION = 1};
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/* (un)purgeable community indicator (supernode) */
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#define COMMUNITY_UNPURGEABLE 0
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#define COMMUNITY_PURGEABLE 1
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/* (un)purgeable supernode indicator */
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enum sn_purge{SN_PURGEABLE = 0, SN_UNPURGEABLE = 1};
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/* Header encryption indicators */
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#define HEADER_ENCRYPTION_UNKNOWN 0
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#define HEADER_ENCRYPTION_NONE 1
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#define HEADER_ENCRYPTION_ENABLED 2
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#define DEFAULT_MTU 1290
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#define HASH_ADD_PEER(head,add) \
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HASH_ADD(hh,head,mac_addr,sizeof(n2n_mac_t),add)
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#define HASH_FIND_PEER(head,mac,out) \
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HASH_FIND(hh,head,mac,sizeof(n2n_mac_t),out)
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#define N2N_EDGE_SN_HOST_SIZE 48
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#define N2N_EDGE_NUM_SUPERNODES 2
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#define N2N_EDGE_SUP_ATTEMPTS 3 /* Number of failed attmpts before moving on to next supernode. */
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#define N2N_PATHNAME_MAXLEN 256
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#define N2N_EDGE_MGMT_PORT 5644
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#define N2N_SN_MGMT_PORT 5645
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/* flag used in add_sn_to_list_by_mac_or_sock */
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enum skip_add{SN_ADD = 0, SN_ADD_SKIP = 1, SN_ADD_ADDED = 2};
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#define N2N_NETMASK_STR_SIZE 16 /* dotted decimal 12 numbers + 3 dots */
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#define N2N_MACNAMSIZ 18 /* AA:BB:CC:DD:EE:FF + NULL*/
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#define N2N_IF_MODE_SIZE 16 /* static | dhcp */
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#define N2N_EDGE_DEFAULT_DEV_NAME "edge0"
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#define N2N_EDGE_DEFAULT_NETMASK "255.255.255.0" /* default netmask for edge ip address... */
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#define N2N_EDGE_DEFAULT_CIDR_NM 24 /* ... also in cidr format */
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#define N2N_SN_LPORT_DEFAULT 7654
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#define N2N_SN_PKTBUF_SIZE 2048
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/* The way TUNTAP allocated IP. */
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#define TUNTAP_IP_MODE_SN_ASSIGN 0
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#define TUNTAP_IP_MODE_STATIC 1
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#define TUNTAP_IP_MODE_DHCP 2
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/* Default network segment of the auto ip address service provided by sn. */
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#define N2N_SN_MIN_AUTO_IP_NET_DEFAULT "10.128.0.0"
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#define N2N_SN_MAX_AUTO_IP_NET_DEFAULT "10.255.255.0"
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#define N2N_SN_AUTO_IP_NET_BIT_DEFAULT 24
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/* ************************************** */
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#define SUPERNODE_IP "127.0.0.1"
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#define SUPERNODE_PORT 1234
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/* ************************************** */
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#define N2N_PKT_VERSION 3
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#define N2N_DEFAULT_TTL 2 /* can be forwarded twice at most */
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#define N2N_COMMUNITY_SIZE 16
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#define N2N_MAC_SIZE 6
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#define N2N_COOKIE_SIZE 4
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#define N2N_DESC_SIZE 16
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#define N2N_PKT_BUF_SIZE 2048
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#define N2N_SOCKBUF_SIZE 64 /* string representation of INET or INET6 sockets */
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#define N2N_MULTICAST_PORT 1968
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#define N2N_MULTICAST_GROUP "224.0.0.68"
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#ifdef WIN32
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#define N2N_IFNAMSIZ 64
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#else
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#define N2N_IFNAMSIZ 16 /* 15 chars * NULL */
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#endif
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#define SN_SELECTION_CRITERION_DATA_TYPE uint32_t
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#define SN_SELECTION_CRITERION_BUF_SIZE 14
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#define N2N_TRANSFORM_ID_USER_START 64
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#define N2N_TRANSFORM_ID_MAX 65535
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#ifndef max
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#define max(a, b) ((a < b) ? b : a)
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#endif
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#ifndef min
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#define min(a, b) ((a > b) ? b : a)
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#endif
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