/* allocate a buffer for socket or tun layer */ void alloc_buf_sock_tun (struct buffer *buf, const struct frame *frame, const bool tuntap_buffer, const unsigned int align_mask) { /* allocate buffer for overlapped I/O */ *buf = alloc_buf (BUF_SIZE (frame)); ASSERT (buf_init (buf, FRAME_HEADROOM_ADJ (frame, align_mask))); buf->len = tuntap_buffer ? MAX_RW_SIZE_TUN (frame) : MAX_RW_SIZE_LINK (frame); ASSERT (buf_safe (buf, 0)); }
void read_incoming_link (struct context *c) { /* * Set up for recvfrom call to read datagram * sent to our TCP/UDP port. */ int status; /*ASSERT (!c->c2.to_tun.len);*/ perf_push (PERF_READ_IN_LINK); c->c2.buf = c->c2.buffers->read_link_buf; ASSERT (buf_init (&c->c2.buf, FRAME_HEADROOM_ADJ (&c->c2.frame, FRAME_HEADROOM_MARKER_READ_LINK))); status = link_socket_read (c->c2.link_socket, &c->c2.buf, MAX_RW_SIZE_LINK (&c->c2.frame), &c->c2.from); if (socket_connection_reset (c->c2.link_socket, status)) { #if PORT_SHARE if (port_share && socket_foreign_protocol_detected (c->c2.link_socket)) { const struct buffer *fbuf = socket_foreign_protocol_head (c->c2.link_socket); const int sd = socket_foreign_protocol_sd (c->c2.link_socket); port_share_redirect (port_share, fbuf, sd); register_signal (c, SIGTERM, "port-share-redirect"); } else #endif { /* received a disconnect from a connection-oriented protocol */ if (c->options.inetd) { register_signal (c, SIGTERM, "connection-reset-inetd"); msg (D_STREAM_ERRORS, "Connection reset, inetd/xinetd exit [%d]", status); } else { #ifdef ENABLE_OCC if (event_timeout_defined(&c->c2.explicit_exit_notification_interval)) { msg (D_STREAM_ERRORS, "Connection reset during exit notification period, ignoring [%d]", status); openvpn_sleep(1); } else #endif { register_signal (c, SIGUSR1, "connection-reset"); /* SOFT-SIGUSR1 -- TCP connection reset */ msg (D_STREAM_ERRORS, "Connection reset, restarting [%d]", status); } } } perf_pop (); return; } /* check recvfrom status */ check_status (status, "read", c->c2.link_socket, NULL); #ifdef ENABLE_SOCKS /* Remove socks header if applicable */ socks_postprocess_incoming_link (c); #endif perf_pop (); }