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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-09-23 16:58:09 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-09-23 16:58:09 +0000 |
commit | 1b15ed82bb5f48d8a03366af769331eac73c9993 (patch) | |
tree | 4a7606fb13420543bf3eff304e7f23c35bf1cebb /nuttx/net/accept.c | |
parent | 8cfdffb35c24737940e70af374300fe36f1fd465 (diff) | |
download | px4-nuttx-1b15ed82bb5f48d8a03366af769331eac73c9993.tar.gz px4-nuttx-1b15ed82bb5f48d8a03366af769331eac73c9993.tar.bz2 px4-nuttx-1b15ed82bb5f48d8a03366af769331eac73c9993.zip |
Add framework for listen() and connect() -- still missing logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@353 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/net/accept.c')
-rw-r--r-- | nuttx/net/accept.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/nuttx/net/accept.c b/nuttx/net/accept.c new file mode 100644 index 000000000..c54b49d37 --- /dev/null +++ b/nuttx/net/accept.c @@ -0,0 +1,129 @@ +/**************************************************************************** + * net/accept.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <nuttx/config.h> +#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0 + +#include <sys/types.h> +#include <sys/socket.h> +#include <errno.h> + +#include "net-internal.h" + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: accept + * + * Description: + * The accept function is used with connection-based socket types + * (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first + * connection request on the queue of pending connections, creates a new + * connected socket with mostly the same properties as 'sockfd', and + * allocates a new socket descriptor for the socket, which is returned. The + * newly created socket is no longer in the listening state. The original + * socket 'sockfd' is unaffected by this call. Per file descriptor flags + * are not inherited across an accept. + * + * The 'sockfd' argument is a socket descriptor that has been created with + * socket(), bound to a local address with bind(), and is listening for + * connections after a call to listen(). + * + * On return, the 'addr' structure is filled in with the address of the + * connecting entity. The 'addrlen' argument initially contains the size + * of the structure pointed to by 'addr'; on return it will contain the + * actual length of the address returned. + * + * If no pending connections are present on the queue, and the socket is + * not marked as non-blocking, accept blocks the caller until a connection + * is present. If the socket is marked non-blocking and no pending + * connections are present on the queue, accept returns EAGAIN. + * + * Parameters: + * sockfd The listening socket descriptior + * addr Receives the address of the connecting client + * addrlen Input: allocated size of 'addr', Return: returned size of 'addr' + * + * Returned Value: + * Returns -1 on error. If it succeeds, it returns a non-negative integer + * that is a descriptor for the accepted socket. + * + * EAGAIN or EWOULDBLOCK + * The socket is marked non-blocking and no connections are present to + * be accepted. + * EBADF + * The descriptor is invalid. + * ENOTSOCK + * The descriptor references a file, not a socket. + * EOPNOTSUPP + * The referenced socket is not of type SOCK_STREAM. + * EINTR + * The system call was interrupted by a signal that was caught before + * a valid connection arrived. + * ECONNABORTED + * A connection has been aborted. + * EINVAL + * Socket is not listening for connections. + * EMFILE + * The per-process limit of open file descriptors has been reached. + * ENFILE + * The system maximum for file descriptors has been reached. + * EFAULT + * The addr parameter is not in a writable part of the user address + * space. + * ENOBUFS or ENOMEM + * Not enough free memory. + * EPROTO + * Protocol error. + * EPERM + * Firewall rules forbid connection. + * + * Assumptions: + * + ****************************************************************************/ + +int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen) +{ + *get_errno_ptr() = ENOSYS; + return ERROR; +} + +#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */ |