├── LICENSE ├── Makefile ├── README.md ├── files ├── n2n.config ├── n2n.init └── n2n.sh └── patches ├── 001-mute-register-super-ack.patch ├── 010-write-self-pid-to-file.patch ├── 020-turn-register-master-and-slave-supernode.patch ├── 030-disable-encryption-and-compression.patch └── 040-change-default-mtu-to-1440.patch /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | 2 | include $(TOPDIR)/rules.mk 3 | 4 | PKG_SOURCE_URL:=https://github.com/MuJJus/n2n 5 | PKG_SOURCE_VERSION:=8347c66 6 | 7 | PKG_NAME:=n2n 8 | PKG_VERSION:=2.1_git$(PKG_SOURCE_VERSION) 9 | PKG_RELEASE:=1 10 | PKG_LICENSE:=GPLv3 11 | PKG_LICENSE_FILES:=LICENSE 12 | 13 | PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION) 14 | PKG_SOURCE:=$(PKG_SOURCE_SUBDIR).tar.gz 15 | PKG_SOURCE_PROTO:=git 16 | 17 | include $(INCLUDE_DIR)/package.mk 18 | 19 | define Package/n2n/Default 20 | SECTION:=net 21 | CATEGORY:=Network 22 | TITLE:=N2N VPN tunneling daemon(V2) 23 | URL:=http://www.ntop.org/n2n/ 24 | SUBMENU:=VPN 25 | DEPENDS:=+kmod-tun +resolveip 26 | endef 27 | 28 | define Package/n2n-edge 29 | $(call Package/n2n/Default) 30 | endef 31 | 32 | define Package/n2n-supernode 33 | $(call Package/n2n/Default) 34 | endef 35 | 36 | define Build/Compile 37 | $(MAKE) -C $(PKG_BUILD_DIR) \ 38 | $(TARGET_CONFIGURE_OPTS) \ 39 | CFLAGS="$(TARGET_CFLAGS)" \ 40 | INSTALL_PROG=":" 41 | endef 42 | 43 | define Package/n2n-edge/install 44 | $(INSTALL_DIR) $(1)/usr/sbin 45 | $(INSTALL_BIN) $(PKG_BUILD_DIR)/edge $(1)/usr/sbin/ 46 | $(INSTALL_DIR) $(1)/lib/netifd/proto 47 | $(INSTALL_BIN) ./files/n2n.sh $(1)/lib/netifd/proto 48 | endef 49 | 50 | define Package/n2n-supernode/conffiles 51 | /etc/config/n2n 52 | endef 53 | 54 | define Package/n2n-supernode/install 55 | $(INSTALL_DIR) $(1)/usr/sbin 56 | $(INSTALL_BIN) $(PKG_BUILD_DIR)/supernode $(1)/usr/sbin/ 57 | $(INSTALL_DIR) $(1)/etc/init.d 58 | $(INSTALL_BIN) ./files/n2n.init $(1)/etc/init.d/n2n 59 | $(INSTALL_DIR) $(1)/etc/config 60 | $(INSTALL_DATA) ./files/n2n.config $(1)/etc/config/n2n 61 | endef 62 | 63 | $(eval $(call BuildPackage,n2n-edge)) 64 | $(eval $(call BuildPackage,n2n-supernode)) 65 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # openwrt-n2n 2 | n2n Mod for MuJJnet project written by [Jason Tse](https://github.com/MuJJus) running on OpenWrt. 3 | forked from [original code](https://svn.ntop.org/svn/ntop/trunk/n2n/n2n_v2) 4 | 5 | ## Build 6 | Example for ar71xx and trunk. 7 | ``` 8 | wget http://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/OpenWrt-SDK-ar71xx-generic_gcc-4.8-linaro_musl-1.1.11.Linux-x86_64.tar.bz2 9 | tar jxf OpenWrt-SDK-ar71xx-generic_gcc-4.8-linaro_musl-1.1.11.Linux-x86_64.tar.bz2 10 | cd OpenWrt-SDK-ar71xx-generic_gcc-4.8-linaro_musl-1.1.11.Linux-x86_64/package 11 | git clone https://github.com/MuJJus/openwrt-n2n n2n 12 | cd .. 13 | make menuconfig # (selected Network -> VPN -> n2n-edge and n2n-supernode) 14 | make package/n2n/compile V=s 15 | ``` 16 | 17 | 18 | ## Usage 19 | The `n2n` protocol options: 20 | 21 | Name | Type | Required | Default | Description 22 | --------------|---------|----------|---------|------------------------------------------------ 23 | server | string | yes | (none) | Supernode server 24 | port | int | yes | (none) | Supernode port 25 | server2 | string | no | (none) | Supernode server of slave 26 | port2 | int | no | (none) | Supernode port of slave 27 | community | string | yes | (none) | N2N community 28 | key | string | no | (none) | The key of the community 29 | mode | string | yes | (none) | For dhcp or static 30 | ipaddr | string | no | (none) | IPv4 Address of the interface 31 | netmask | string | no | (none) | Netmask of the interface 32 | gateway | string | no | (none) | Gateway of the interface 33 | ip6addr | string | no | (none) | IPv6 Address of the interface 34 | ip6prefixlen | int | no | (none) | IPv6 Prefix Length of the interface 35 | ip6gw | string | no | (none) | IPv6 Gateway of the interface 36 | macaddr | string | no | random | MAC Address 37 | mtu | int | no | 1440 | Maximum Transmit Unit 38 | forwarding | boolean | no | false | Enable packet forwarding through n2n community 39 | dynamic | boolean | no | false | Periodically resolve supernode IP 40 | localport | int | no | random | Fixed local UDP port 41 | mgmtport | int | no | (none) | Management UDP Port (for multiple edges on a machine) 42 | multicast | boolean | no | false | Accept multicast MAC addresses 43 | verbose | boolean | no | false | Make more verbose 44 | 45 | For supernode 46 | ``` 47 | # vi /etc/config/n2n 48 | config supernode 49 | option enable '1' 50 | option port '80' 51 | 52 | # /etc/init.d/n2n start 53 | ``` 54 | 55 | ## LuCI 56 | * edge [luci-proto-n2n](https://github.com/MuJJus/luci-proto-n2n) 57 | * supernode [luci-app-n2n](https://github.com/MuJJus/luci-app-n2n) 58 | -------------------------------------------------------------------------------- /files/n2n.config: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/MuJJus/openwrt-n2n/1d34e5a7b784bad2d0f814ddb19409d3043a229d/files/n2n.config -------------------------------------------------------------------------------- /files/n2n.init: -------------------------------------------------------------------------------- 1 | #!/bin/sh /etc/rc.common 2 | 3 | START=90 4 | STOP=10 5 | 6 | run_supernode() { 7 | local enable port 8 | config_get_bool enable $1 enable 9 | config_get port $1 port 10 | 11 | [ "$enable" = 1 ] && { 12 | /usr/sbin/supernode -l $port 13 | } 14 | } 15 | 16 | start() { 17 | config_load n2n 18 | config_foreach run_supernode supernode 19 | } 20 | 21 | stop() { 22 | killall -SIGTERM supernode >/dev/null 2>&1 23 | } 24 | -------------------------------------------------------------------------------- /files/n2n.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | [ -n "$INCLUDE_ONLY" ] || { 4 | . /lib/functions.sh 5 | . ../netifd-proto.sh 6 | init_proto "$@" 7 | } 8 | 9 | proto_n2n_setup() { 10 | local cfg="$1" 11 | local device="n2n-$cfg" 12 | local server port server2 port2 mode ipaddr netmask gateway macaddr mtu community key forwarding ip6addr ip6prefixlen ip6gw dynamic localport mgmtport multicast verbose 13 | json_get_vars server port server2 port2 mode ipaddr netmask gateway macaddr mtu community key forwarding ip6addr ip6prefixlen ip6gw dynamic localport mgmtport multicast verbose 14 | 15 | [ -n "$server" ] && { 16 | for ip in $(resolveip -t 5 "$server"); do 17 | ( proto_add_host_dependency "$cfg" "$ip" ) 18 | serv_addr=1 19 | done 20 | } 21 | [ -n "$server2" ] && { 22 | for ip in $(resolveip -t 5 "$server2"); do 23 | ( proto_add_host_dependency "$cfg" "$ip" ) 24 | serv_addr=1 25 | done 26 | } 27 | [ -n "$serv_addr" ] || { 28 | echo "Could not resolve server address" 29 | sleep 5 30 | proto_setup_failed "$cfg" 31 | exit 1 32 | } 33 | 34 | proto_run_command "$cfg" /usr/sbin/edge -f \ 35 | -d "$device" \ 36 | -l "${server}:${port}" \ 37 | $([ -n "$server2" -a -n "$port2" ] && echo -l "${server2}:${port2}") \ 38 | -a "${mode}:${ipaddr=0.0.0.0}" \ 39 | $([ -n "$netmask" ] && echo -s $netmask) \ 40 | -c "$community" \ 41 | $([ -n "$key" ] && echo -k $key) \ 42 | $([ -n "$macaddr" ] && echo -m $macaddr) \ 43 | $([ -n "$mtu" ] && echo -M $mtu) \ 44 | $([ "$forwarding" = 1 ] && echo -r) \ 45 | $([ "$dynamic" = 1 ] && echo -b) \ 46 | $([ -n "$localport" ] && echo -p $localport) \ 47 | $([ -n "$mgmtport" ] && echo -t $mgmtport) \ 48 | $([ "$multicast" = 1 ] && echo -E) \ 49 | $([ "$verbose" = 1 ] && echo -v) 50 | 51 | proto_init_update "$device" 1 1 52 | proto_set_keep 1 53 | sleep 1 54 | 55 | proto_add_ipv4_address "$ipaddr" "$netmask" 56 | 57 | if [ -n "$ip6addr" ] && [ -n "$ip6prefixlen" ]; then 58 | ifconfig "$device" "${ip6addr}/${ip6prefixlen}" 59 | proto_add_ipv6_address "$ip6addr" "$ip6prefixlen" 60 | fi 61 | 62 | [ -n "$gateway" ] && { 63 | proto_add_ipv4_route 0.0.0.0 0 "$gateway" 64 | } 65 | 66 | [ -n "$ip6gw" ] && { 67 | proto_add_ipv6_route "::" 0 "$ip6gw" 68 | } 69 | 70 | proto_send_update "$cfg" 71 | } 72 | 73 | proto_n2n_teardown() { 74 | local cfg="$1" 75 | local device="n2n-$cfg" 76 | 77 | proto_init_update "$device" 0 78 | proto_kill_command "$1" 79 | kill -SIGKILL `cat /var/run/${device}.pid` >/dev/null 2>&1 80 | proto_send_update "$cfg" 81 | } 82 | 83 | proto_n2n_init_config() { 84 | no_device=1 85 | available=1 86 | 87 | proto_config_add_string "server" 88 | proto_config_add_int "port" 89 | proto_config_add_string "server2" 90 | proto_config_add_int "port2" 91 | proto_config_add_string "mode" 92 | proto_config_add_string "ipaddr" 93 | proto_config_add_string "netmask" 94 | proto_config_add_string "gateway" 95 | proto_config_add_string "macaddr" 96 | proto_config_add_int "mtu" 97 | proto_config_add_string "community" 98 | proto_config_add_string "key" 99 | proto_config_add_boolean "forwarding" 100 | proto_config_add_string "ip6addr" 101 | proto_config_add_int "ip6prefixlen" 102 | proto_config_add_string "ip6gw" 103 | proto_config_add_boolean "dynamic" 104 | proto_config_add_int "localport" 105 | proto_config_add_int "mgmtport" 106 | proto_config_add_boolean "multicast" 107 | proto_config_add_boolean "verbose" 108 | } 109 | 110 | [ -n "$INCLUDE_ONLY" ] || { 111 | add_protocol n2n 112 | } 113 | -------------------------------------------------------------------------------- /patches/001-mute-register-super-ack.patch: -------------------------------------------------------------------------------- 1 | --- a/edge.c 2015-03-25 00:35:32.375981597 +0000 2 | +++ b/edge.c 2015-03-25 00:36:56.383981596 +0000 3 | @@ -1717,7 +1717,7 @@ 4 | orig_sender = &(ra.sock); 5 | } 6 | 7 | - traceEvent(TRACE_NORMAL, "Rx REGISTER_SUPER_ACK myMAC=%s [%s] (external %s). Attempts %u", 8 | + traceEvent(TRACE_INFO, "Rx REGISTER_SUPER_ACK myMAC=%s [%s] (external %s). Attempts %u", 9 | macaddr_str( mac_buf1, ra.edgeMac ), 10 | sock_to_cstr(sockbuf1, &sender), 11 | sock_to_cstr(sockbuf2, orig_sender), 12 | -------------------------------------------------------------------------------- /patches/010-write-self-pid-to-file.patch: -------------------------------------------------------------------------------- 1 | --- a/edge.c 2015-03-25 00:35:32.375981597 +0000 2 | +++ b/edge.c 2015-03-27 04:54:56.271981597 +0000 3 | @@ -1935,6 +1935,7 @@ 4 | char ip_mode[N2N_IF_MODE_SIZE]="static"; 5 | char ip_addr[N2N_NETMASK_STR_SIZE] = ""; 6 | char netmask[N2N_NETMASK_STR_SIZE]="255.255.255.0"; 7 | + char pidfile[512]; 8 | int mtu = DEFAULT_MTU; 9 | int got_s = 0; 10 | 11 | @@ -2188,6 +2189,11 @@ 12 | } 13 | #endif /* #ifdef N2N_HAVE_DAEMON */ 14 | 15 | + sprintf(pidfile, "/var/run/%s.pid", tuntap_dev_name); 16 | + FILE *fp = fopen(pidfile, "w"); 17 | + fprintf(fp, "%d", getpid()); 18 | + fclose(fp); 19 | + 20 | 21 | traceEvent( TRACE_NORMAL, "Starting n2n edge %s %s", n2n_sw_version, n2n_sw_buildDate ); 22 | 23 | -------------------------------------------------------------------------------- /patches/020-turn-register-master-and-slave-supernode.patch: -------------------------------------------------------------------------------- 1 | --- a/edge.c 2015-03-25 00:35:32.375981597 +0000 2 | +++ b/edge.c 2015-04-06 08:47:03.391981597 +0000 3 | @@ -80,7 +80,7 @@ 4 | typedef char n2n_sn_name_t[N2N_EDGE_SN_HOST_SIZE]; 5 | 6 | #define N2N_EDGE_NUM_SUPERNODES 2 7 | -#define N2N_EDGE_SUP_ATTEMPTS 3 /* Number of failed attmpts before moving on to next supernode. */ 8 | +#define N2N_EDGE_SUP_ATTEMPTS 0 /* Number of failed attmpts before moving on to next supernode. */ 9 | 10 | 11 | /** Main structure type for edge. */ 12 | @@ -1025,8 +1025,8 @@ 13 | return; /* Too early */ 14 | } 15 | 16 | - if ( 0 == eee->sup_attempts ) 17 | - { 18 | + /* if ( 0 == eee->sup_attempts ) 19 | + { */ 20 | /* Give up on that supernode and try the next one. */ 21 | ++(eee->sn_idx); 22 | 23 | @@ -1036,15 +1036,15 @@ 24 | eee->sn_idx=0; 25 | } 26 | 27 | - traceEvent(TRACE_WARNING, "Supernode not responding - moving to %u of %u", 28 | - (unsigned int)eee->sn_idx, (unsigned int)eee->sn_num ); 29 | + /* traceEvent(TRACE_WARNING, "Supernode not responding - moving to %u of %u", 30 | + (unsigned int)eee->sn_idx, (unsigned int)eee->sn_num ); */ 31 | 32 | eee->sup_attempts = N2N_EDGE_SUP_ATTEMPTS; 33 | - } 34 | + /* } 35 | else 36 | { 37 | --(eee->sup_attempts); 38 | - } 39 | + } */ 40 | 41 | if(eee->re_resolve_supernode_ip || (eee->sn_num > 1) ) 42 | { 43 | @@ -1736,7 +1736,14 @@ 44 | eee->sup_attempts = N2N_EDGE_SUP_ATTEMPTS; /* refresh because we got a response */ 45 | 46 | /* REVISIT: store sn_back */ 47 | - eee->register_lifetime = ra.lifetime; 48 | + if ( eee->sn_num > 1 ) 49 | + { 50 | + eee->register_lifetime = ra.lifetime/2; 51 | + } 52 | + else 53 | + { 54 | + eee->register_lifetime = ra.lifetime; 55 | + } 56 | eee->register_lifetime = MAX( eee->register_lifetime, REGISTER_SUPER_INTERVAL_MIN ); 57 | eee->register_lifetime = MIN( eee->register_lifetime, REGISTER_SUPER_INTERVAL_MAX ); 58 | } 59 | -------------------------------------------------------------------------------- /patches/030-disable-encryption-and-compression.patch: -------------------------------------------------------------------------------- 1 | diff -urN a/Makefile b/Makefile 2 | --- a/Makefile 2015-10-22 04:42:11.262000270 +0000 3 | +++ b/Makefile 2015-10-22 04:54:51.394016585 +0000 4 | @@ -17,8 +17,8 @@ 5 | N2N_OBJS_OPT= 6 | LIBS_EDGE_OPT= 7 | 8 | -N2N_OPTION_AES?="yes" 9 | -#N2N_OPTION_AES=no 10 | +#N2N_OPTION_AES?="yes" 11 | +N2N_OPTION_AES=no 12 | 13 | ifeq ($(N2N_OPTION_AES), "yes") 14 | N2N_DEFINES+="-DN2N_HAVE_AES" 15 | diff -urN a/n2n.h b/n2n.h 16 | --- a/n2n.h 2015-10-22 04:42:10.470000096 +0000 17 | +++ b/n2n.h 2015-10-22 04:55:15.581992195 +0000 18 | @@ -155,7 +155,7 @@ 19 | * frames. Doing this will break compatibility with the standard n2n packet 20 | * format so do it only for experimentation. All edges must be built with the 21 | * same value if they are to understand each other. */ 22 | -#define N2N_COMPRESSION_ENABLED 1 23 | +#define N2N_COMPRESSION_ENABLED 0 24 | 25 | #define DEFAULT_MTU 1400 26 | 27 | -------------------------------------------------------------------------------- /patches/040-change-default-mtu-to-1440.patch: -------------------------------------------------------------------------------- 1 | --- a/n2n.h 2015-10-22 04:42:10.470000096 +0000 2 | +++ b/n2n.h 2015-10-22 04:57:14.706008258 +0000 3 | @@ -157,7 +157,7 @@ 4 | * same value if they are to understand each other. */ 5 | #define N2N_COMPRESSION_ENABLED 1 6 | 7 | -#define DEFAULT_MTU 1400 8 | +#define DEFAULT_MTU 1440 9 | 10 | /** Common type used to hold stringified IP addresses. */ 11 | typedef char ipstr_t[32]; 12 | --------------------------------------------------------------------------------