1* /* 2* * Copyright 2021 Google LLC 3* * 4* * Licensed under the Apache License, Version 2.0 (the "License"); 5* * you may not use this file except in compliance with the License. 6* * You may obtain a copy of the License at 7* * 8* * http://www.apache.org/licenses/LICENSE-2.0 9* * 10* * Unless required by applicable law or agreed to in writing, software 11* * distributed under the License is distributed on an "AS IS" BASIS, 12* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13* * See the License for the specific language governing permissions and 14* * limitations under the License. 15* */ 16* 17* #pragma once 18* 19* #include "net_iface.h" 20* #include "net_sockio.h" 21* 22* #include <sys/socket.h> 23* 24* #include <cstddef> 25* #include <cstring> 26* 27* namespace ncsi 28* { 29* 30* class SockIO : public net::SockIO 31* { 32* public: 33* SockIO() = default; 34* 35* explicit SockIO(int sockfd) : net::SockIO(sockfd) 36* {} 37* 38* // This function creates a raw socket and initializes sockfd_. 39* // If the default constructor for this class was used, 40* // this function MUST be called before the object can be used 41* // for anything else. 42* int init(); 43* 44* // Since raw packet socket is used for NC-SI, it needs to be bound 45* // to the interface. This function needs to be called after init, 46* // before the socket it used for communication. 47* int bind_to_iface(const net::IFaceBase& iface); 48* 49* // Applies a filter to the interface to ignore VLAN tagged packets 50* int filter_vlans(); 51* 52* // Non-blocking version of recv. Uses poll with timeout. 53* int recv(void* buf, size_t maxlen) override; 54* 55* private: 56* struct sockaddr_ll sock_addr_; 57* const int kpoll_timeout_ = 10; 58* }; 59* 60* } // namespace ncsi 61*