/**************************************************************************** * net/netdev/netdev_input.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include "utils/utils.h" /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: netdev_input * * Description: * This function will copy the flat buffer that does not support * Scatter/gather to the iob vector buffer. * * Compatible with all old flat buffer NICs: * * [tcp|udp|icmp|...]ipv[4|6]_data_handler() * | (iob_concat/append to readahead) * | * pkt/ipv[4/6]_in()/... * | * | * netdev_input() // new interface, Scatter/gather flat/iobs * | * | * pkt/ipv[4|6]_input()/... * | * | * NICs io vector receive(Orignal flat buffer) * * Input Parameters: * NULL * * Returned Value: * Pointer to default network driver on success; null on failure * ****************************************************************************/ int netdev_input(FAR struct net_driver_s *dev, devif_poll_callback_t callback, bool reply) { uint16_t llhdrlen = NET_LL_HDRLEN(dev); unsigned int offset = CONFIG_NET_LL_GUARDSIZE - llhdrlen; FAR uint8_t *buf = dev->d_buf; unsigned int l3l4len; int ret; /* Prepare iob buffer */ ret = netdev_iob_prepare(dev, false, 0); if (ret != OK) { return ret; } /* Copy l2 header to gruard area */ memcpy(dev->d_iob->io_data + offset, buf, llhdrlen); /* Copy l3/l4 data to iob entry */ l3l4len = dev->d_len - llhdrlen; ret = iob_trycopyin(dev->d_iob, buf + llhdrlen, l3l4len, 0, false); if (ret == l3l4len) { /* Update device buffer to l2 start */ dev->d_buf = dev->d_iob->io_data + offset; iob_update_pktlen(dev->d_iob, l3l4len); ret = callback(dev); if (dev->d_iob != NULL && reply) { if (ret == OK && dev->d_len > 0) { iob_copyout(buf + llhdrlen, dev->d_iob, dev->d_len, 0); memcpy(buf, dev->d_iob->io_data + offset, llhdrlen); } } } netdev_iob_release(dev); dev->d_buf = buf; return ret; }