/**************************************************************************** * net/usrsock/usrsock_getsockname.c * * Copyright (C) 2015, 2017 Haltian Ltd. All rights reserved. * Author: Jussi Kivilinna * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK) #include #include #include #include #include #include #include #include #include #include #include #include "socket/socket.h" #include "usrsock/usrsock.h" /**************************************************************************** * Private Functions ****************************************************************************/ static uint16_t getsockname_event(FAR struct net_driver_s *dev, FAR void *pvconn, FAR void *pvpriv, uint16_t flags) { FAR struct usrsock_data_reqstate_s *pstate = pvpriv; FAR struct usrsock_conn_s *conn = pvconn; if (flags & USRSOCK_EVENT_ABORT) { ninfo("socket aborted.\n"); pstate->reqstate.result = -ECONNABORTED; pstate->valuelen = 0; /* Stop further callbacks */ pstate->reqstate.cb->flags = 0; pstate->reqstate.cb->priv = NULL; pstate->reqstate.cb->event = NULL; /* Wake up the waiting thread */ sem_post(&pstate->reqstate.recvsem); } else if (flags & USRSOCK_EVENT_REQ_COMPLETE) { ninfo("request completed.\n"); pstate->reqstate.result = conn->resp.result; if (pstate->reqstate.result < 0) { pstate->valuelen = 0; pstate->valuelen_nontrunc = 0; } else { pstate->valuelen = conn->resp.valuelen; pstate->valuelen_nontrunc = conn->resp.valuelen_nontrunc; } /* Stop further callbacks */ pstate->reqstate.cb->flags = 0; pstate->reqstate.cb->priv = NULL; pstate->reqstate.cb->event = NULL; /* Wake up the waiting thread */ sem_post(&pstate->reqstate.recvsem); } return flags; } /**************************************************************************** * Name: do_getsockopt_request ****************************************************************************/ static int do_getsockname_request(FAR struct usrsock_conn_s *conn, socklen_t addrlen) { struct usrsock_request_getsockname_s req = {}; struct iovec bufs[1]; if (addrlen > UINT16_MAX) { addrlen = UINT16_MAX; } /* Prepare request for daemon to read. */ req.head.reqid = USRSOCK_REQUEST_GETSOCKNAME; req.usockid = conn->usockid; req.max_addrlen = addrlen; bufs[0].iov_base = (FAR void *)&req; bufs[0].iov_len = sizeof(req); return usrsockdev_do_request(conn, bufs, ARRAY_SIZE(bufs)); } /**************************************************************************** * Name: setup_conn_getsockopt ****************************************************************************/ static void setup_conn_getsockname(FAR struct usrsock_conn_s *conn, FAR struct iovec *iov, unsigned int iovcnt) { unsigned int i; conn->resp.datain.iov = iov; conn->resp.datain.pos = 0; conn->resp.datain.total = 0; conn->resp.datain.iovcnt = iovcnt; for (i = 0; i < iovcnt; i++) { conn->resp.datain.total += iov[i].iov_len; } } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Function: usrsock_getsockname * * Description: * The getsockname() function retrieves the locally-bound name of the * specified socket, stores this address in the sockaddr structure pointed * to by the 'addr' argument, and stores the length of this address in the * object pointed to by the 'addrlen' argument. * * If the actual length of the address is greater than the length of the * supplied sockaddr structure, the stored address will be truncated. * * If the socket has not been bound to a local name, the value stored in * the object pointed to by address is unspecified. * * Parameters: * conn usrsock socket connection structure * addr sockaddr structure to receive data [out] * addrlen Length of sockaddr structure [in/out] * ****************************************************************************/ int usrsock_getsockname(FAR struct usrsock_conn_s *conn, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { struct usrsock_data_reqstate_s state = {}; struct iovec inbufs[1]; ssize_t ret; socklen_t outaddrlen = 0; net_lock(); if (conn->state == USRSOCK_CONN_STATE_UNINITIALIZED || conn->state == USRSOCK_CONN_STATE_ABORTED) { /* Invalid state or closed by daemon. */ ninfo("usockid=%d; connect() with uninitialized usrsock.\n", conn->usockid); ret = (conn->state == USRSOCK_CONN_STATE_ABORTED) ? -EPIPE : -ECONNRESET; goto errout_unlock; } /* Set up event callback for usrsock. */ ret = usrsock_setup_data_request_callback( conn, &state, getsockname_event, USRSOCK_EVENT_ABORT | USRSOCK_EVENT_REQ_COMPLETE); if (ret < 0) { nwarn("usrsock_setup_request_callback failed: %d\n", ret); goto errout_unlock; } inbufs[0].iov_base = (FAR void *)addr; inbufs[0].iov_len = *addrlen; setup_conn_getsockname(conn, inbufs, ARRAY_SIZE(inbufs)); /* Request user-space daemon to close socket. */ ret = do_getsockname_request(conn, *addrlen); if (ret >= 0) { /* Wait for completion of request. */ while (net_lockedwait(&state.reqstate.recvsem) != OK) { DEBUGASSERT(*get_errno_ptr() == EINTR); } ret = state.reqstate.result; DEBUGASSERT(state.valuelen <= *addrlen); DEBUGASSERT(state.valuelen <= state.valuelen_nontrunc); if (ret >= 0) { /* Store length of data that was written to 'value' buffer. */ outaddrlen = state.valuelen_nontrunc; } } setup_conn_getsockname(conn, NULL, 0); usrsock_teardown_data_request_callback(&state); errout_unlock: net_unlock(); *addrlen = outaddrlen; return ret; } #endif /* CONFIG_NET && CONFIG_NET_USRSOCK */