Hello, It seems I found a possible source of this bug. The problem is in the way the pppol2tp driver initializes internal kernel tunnel and socket structures. It implicitly assumes that you want to use the kernel-based tunnel immediately after you've got a peer tunnel id. This means you must prepare kernel socket as follows
struct sockaddr_pppol2tp sax; int fd, session_fd; fd = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); sax.sa_family = AF_PPPOX; sax.sa_protocol = PX_PROTO_OL2TP; sax.pppol2tp.fd = tunnel_fd; sax.pppol2tp.addr.sin_addr.s_addr = addr->sin_addr.s_addr; sax.pppol2tp.addr.sin_port = addr->sin_port; sax.pppol2tp.addr.sin_family = AF_INET; sax.pppol2tp.s_tunnel = tunnel_id; sax.pppol2tp.s_session = 0; sax.pppol2tp.d_tunnel = peer_tunnel_id; sax.pppol2tp.d_session = 0; session_fd = connect(fd, (struct sockaddr *)&sax, sizeof(sax)); Note, that s_session, d_session members must be 0 and you must perform connect() call. Only in this case you get properly prepared sockets. Now, take a look at init_network() function. They use only socket() call to prepare kernel sockets and this is not enough. Thus, when they make connect() to the kernel socket in start_pppd(), they get this bug. To test this, I moved the kernel support code from init_network() to start_pppd() and add modification of the above initialization code. The bug disappeared. However, this is not whole story. When kernel support is on, pppd uses plugin pppol2tp.so, which is not present in Debian repositories (but present in openltp). So, I'm still unable to get xl2tpd work with kernel support. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
