Hi, I'm having issues running user-space code, which uses net/l2tp/l2tp_ppp.c. The code is supposed to be running in LAC mode (which is I believe is default). My server configuration described here: https://wiki.linaro.org/LMG/Kernel/PPP
I was trying to use next code snippets as user-space part: 1. Code example from comments in net/l2tp/l2tp_ppp.c 2. Code examples from Documentation/networking/l2tp.txt 3. Code from this project: http://www.kvack.org/~bcrl/pppol2tp/multihop.c Basically, I was trying two options for user-space code: 1. Creating only one sockaddr_pppol2tp, like this: <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> session_fd = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); session_sa.sa_family = AF_PPPOX; session_sa.sa_protocol = PX_PROTO_OL2TP; session_sa.pppol2tp.fd = udp_fd; session_sa.pppol2tp.s_tunnel = local_tunnel; session_sa.pppol2tp.s_session = local_session; session_sa.pppol2tp.d_tunnel = remote_tunnel; session_sa.pppol2tp.d_session = remote_session; connect(session_fd, (struct sockaddr *)&session_sa, sizeof(session_sa)); <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> In that case user-space tool was failing on connect() call. 2. Creating two sockaddr_pppol2tp, like this: <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> tunnel_fd = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); tunnel_sa.sa_family = AF_PPPOX; tunnel_sa.sa_protocol = PX_PROTO_OL2TP; tunnel_sa.pppol2tp.fd = the_socket; /* UDP socket */ tunnel_sa.pppol2tp.s_tunnel = local_tunnel; tunnel_sa.pppol2tp.s_session = 0; /* special case: mgmt socket */ tunnel_sa.pppol2tp.d_tunnel = remote_tunnel; tunnel_sa.pppol2tp.d_session = 0; /* special case: mgmt socket */ connect(tunnel_fd, (struct sockaddr *)&tunnel_sa, sizeof(tunnel_sa)); session_fd = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); session_sa.sa_family = AF_PPPOX; session_sa.sa_protocol = PX_PROTO_OL2TP; session_sa.pppol2tp.fd = udp_fd; session_sa.pppol2tp.s_tunnel = local_tunnel; session_sa.pppol2tp.s_session = local_session; session_sa.pppol2tp.d_tunnel = remote_tunnel; session_sa.pppol2tp.d_session = remote_session; connect(session_fd, (struct sockaddr *)&session_sa, sizeof(session_sa)); <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> In this case my user-space tool works fine, but my server shows next errors in /var/log/syslog: <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> Jul 3 16:32:49 joe-laptop xl2tpd[2978]: Can not find tunnel 25061 (refhim=0) Jul 3 16:32:49 joe-laptop xl2tpd[2978]: network_thread: unable to find call or tunnel to handle packet. call = 48566, tunnel = 25061 Dumping. <<<<<<<<<<<<<<<<<<<<<< cut here >>>>>>>>>>>>>>>>>> UDP socket was created next way (for both cases): https://android.googlesource.com/platform/external/mtpd/+/0269612ac00a0700997dda333faf0a3c33a388b8/mtpd.c#253 (see the_socket variable in create_socket() function). So my questions are: 1. Am I doing something wrong in userspace part? Because my server part is working fine with Android kernel implementation of LAC (drivers/net/ppp/pppolac.c). When I'm trying to do the same with mainline kernel implementation of LAC -- I'm having issues described above. 2. Do we have some testing code for L2TP (particularly LAC)? Or maybe just some working user-space code sample? Thanks! -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
