anchao commented on a change in pull request #4071: URL: https://github.com/apache/incubator-nuttx/pull/4071#discussion_r664998555
########## File path: net/socket/socketpair.c ########## @@ -0,0 +1,181 @@ +/**************************************************************************** + * net/socket/socketpair.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 <netinet/in.h> +#include <arpa/inet.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/net/net.h> + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: psock_socketpair + * + * Description: + * Create an unbound pair of connected sockets in a specified domain, of a + * specified type, under the protocol optionally specified by the protocol + * argument. The two sockets shall be identical. The file descriptors used + * in referencing the created sockets shall be returned in + * sv[0] and sv[1]. + * + * Input Parameters: + * domain - (see sys/socket.h) + * type - (see sys/socket.h) + * protocol - (see sys/socket.h) + * psocks - The array to catch the pair descriptors + * + ****************************************************************************/ + +int psock_socketpair(int domain, int type, int protocol, + FAR struct socket *psocks[2]) +{ + int ret; + + /* Initialize the socket structure */ + + ret = psock_socket(domain, type, protocol, psocks[0]); + if (ret < 0) + { + return ret; + } + + if (psocks[0]->s_sockif->si_socketpair == NULL) + { + ret = -EAFNOSUPPORT; + goto errsock; + } + + ret = psock_socket(domain, type, protocol, psocks[1]); + if (ret < 0) + { + goto errsock; + } + + /* Perform socketpair process */ + + ret = psocks[0]->s_sockif->si_socketpair(psocks); + if (ret == 0) + { + return ret; + } + + psock_close(psocks[1]); +errsock: + psock_close(psocks[0]); + return ret; +} + +/**************************************************************************** + * Name: socketpair + * + * Description: + * Create an unbound pair of connected sockets in a specified domain, of a + * specified type, under the protocol optionally specified by the protocol + * argument. The two sockets shall be identical. The file descriptors used + * in referencing the created sockets shall be returned in + * sv[0] and sv[1]. + * + * Input Parameters: + * domain - (see sys/socket.h) + * type - (see sys/socket.h) + * protocol - (see sys/socket.h) + * sv[2] - The user provided array in which to catch the pair + * descriptors + * + ****************************************************************************/ + +int socketpair(int domain, int type, int protocol, int sv[2]) +{ + FAR struct socket *psocks[2]; + int oflags = O_RDWR; + int i = 0; + int ret; + + if (sv == NULL) + { + ret = -EINVAL; + goto errout; + } + + for (i = 0; i < 2; i++) + { + psocks[i] = kmm_zalloc(sizeof(*psocks[i])); + if (psocks[i] == NULL) + { + ret = -ENOMEM; + goto errout_with_alloc; + } + } + + ret = psock_socketpair(domain, type, protocol, psocks); + if (ret < 0) + { + goto errout_with_alloc; + } + + if (type & SOCK_CLOEXEC) + { + oflags |= O_CLOEXEC; + } + + /* Allocate a socket descriptor */ + + for (i = 0; i < 2; i++) + { + sv[i] = sockfd_allocate(psocks[i], oflags); + if (sv[i] < 0) + { + ret = sv[i]; + goto errout_with_psock; + } + } + + return OK; + +errout_with_psock: + while (i-- > 0) + { + nx_close(sv[i]); + } + + i = 2; Review comment: Done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
