1 PPPoL2TP plugin 2 =============== 3 4 The pppol2tp plugin lets pppd use the Linux kernel driver pppol2tp.ko 5 to pass PPP frames in L2TP tunnels. The driver was integrated into the 6 kernel in the 2.6.23 release. For kernels before 2.6.23, an 7 out-of-tree kernel module is available from the pppol2tp-kmod package 8 in the OpenL2TP project. 9 10 Note that pppd receives only PPP control frames over the PPPoL2TP 11 socket; data frames are handled entirely by the kernel. 12 13 The pppol2tp plugin adds extra arguments to pppd and uses the Linux kernel 14 PPP-over-L2TP driver to set up each session's data path. 15 16 Arguments are:- 17 18 pppol2tp <fd> - FD for PPPoL2TP socket 19 pppol2tp_lns_mode - PPPoL2TP LNS behavior. Default off. 20 pppol2tp_send_seq - PPPoL2TP enable sequence numbers in 21 transmitted data packets. Default off. 22 pppol2tp_recv_seq - PPPoL2TP enforce sequence numbers in 23 received data packets. Default off. 24 pppol2tp_reorderto <millisecs> - PPPoL2TP data packet reorder timeout. 25 Default 0 (no reordering). 26 pppol2tp_debug_mask <mask> - PPPoL2TP debug mask. Bitwise OR of 27 1 - verbose debug 28 2 - control 29 4 - kernel transport 30 8 - ppp packet data 31 Default: 0 (no debug). 32 pppol2tp_ifname <ifname> - Name of PPP network interface visible 33 to "ifconfig" and "ip link". 34 Default: "pppN" 35 pppol2tp_tunnel_id <id> - L2TP tunnel_id tunneling this PPP 36 session. 37 pppol2tp_session_id <id> - L2TP session_id of this PPP session. 38 The tunnel_id/session_id pair is used 39 when sending event messages to openl2tpd. 40 41 pppd will typically be started by an L2TP daemon for each L2TP sesion, 42 supplying one or more of the above arguments as required. The pppd 43 user will usually have no visibility of these arguments. 44 45 Two hooks are exported by this plugin. 46 47 void (*pppol2tp_send_accm_hook)(int tunnel_id, int session_id, 48 uint32_t send_accm, uint32_t recv_accm); 49 void (*pppol2tp_ip_updown_hook)(int tunnel_id, int session_id, int up); 50 51 Credits 52 ======= 53 54 This plugin was developed by Katalix Systems as part of the OpenL2TP 55 project, http://openl2tp.sourceforge.net. OpenL2TP is a full-featured 56 L2TP client-server, suitable for use as an enterprise L2TP VPN server 57 or a VPN client. 58 59 Please copy problems to the OpenL2TP mailing list: 60 openl2tp-users (a] lists.sourceforge.net. 61 62 Maintained by: 63 James Chapman 64 jchapman (a] katalix.com 65 Katalix Systems Ltd 66 http://www.katalix.com 67
Indexes created Fri Sep 25 00:27:33 UTC 2026