| PPPoL2TP plugin |
| =============== |
| |
| The pppol2tp plugin lets pppd use the Linux kernel driver pppol2tp.ko |
| to pass PPP frames in L2TP tunnels. The driver was integrated into the |
| kernel in the 2.6.23 release. For kernels before 2.6.23, an |
| out-of-tree kernel module is available from the pppol2tp-kmod package |
| in the OpenL2TP project. |
| |
| Note that pppd receives only PPP control frames over the PPPoL2TP |
| socket; data frames are handled entirely by the kernel. |
| |
| The pppol2tp plugin adds extra arguments to pppd and uses the Linux kernel |
| PPP-over-L2TP driver to set up each session's data path. |
| |
| Arguments are:- |
| |
| pppol2tp <fd> - FD for PPPoL2TP socket |
| pppol2tp_lns_mode - PPPoL2TP LNS behavior. Default off. |
| pppol2tp_send_seq - PPPoL2TP enable sequence numbers in |
| transmitted data packets. Default off. |
| pppol2tp_recv_seq - PPPoL2TP enforce sequence numbers in |
| received data packets. Default off. |
| pppol2tp_reorderto <millisecs> - PPPoL2TP data packet reorder timeout. |
| Default 0 (no reordering). |
| pppol2tp_debug_mask <mask> - PPPoL2TP debug mask. Bitwise OR of |
| 1 - verbose debug |
| 2 - control |
| 4 - kernel transport |
| 8 - ppp packet data |
| Default: 0 (no debug). |
| pppol2tp_ifname <ifname> - Name of PPP network interface visible |
| to "ifconfig" and "ip link". |
| Default: "pppN" |
| pppol2tp_tunnel_id <id> - L2TP tunnel_id tunneling this PPP |
| session. |
| pppol2tp_session_id <id> - L2TP session_id of this PPP session. |
| The tunnel_id/session_id pair is used |
| when sending event messages to openl2tpd. |
| |
| pppd will typically be started by an L2TP daemon for each L2TP sesion, |
| supplying one or more of the above arguments as required. The pppd |
| user will usually have no visibility of these arguments. |
| |
| Two hooks are exported by this plugin. |
| |
| void (*pppol2tp_send_accm_hook)(int tunnel_id, int session_id, |
| uint32_t send_accm, uint32_t recv_accm); |
| void (*pppol2tp_ip_updown_hook)(int tunnel_id, int session_id, int up); |
| |
| Credits |
| ======= |
| |
| This plugin was developed by Katalix Systems as part of the OpenL2TP |
| project, http://openl2tp.sourceforge.net. OpenL2TP is a full-featured |
| L2TP client-server, suitable for use as an enterprise L2TP VPN server |
| or a VPN client. |
| |
| Please copy problems to the OpenL2TP mailing list: |
| openl2tp-users@lists.sourceforge.net. |
| |
| Maintained by: |
| James Chapman |
| jchapman@katalix.com |
| Katalix Systems Ltd |
| http://www.katalix.com |