/**************************************************************************** * net/setsockopt.c * * Copyright (C) 2007 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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_SOCKOPTS) #include #include #include #include "net_internal.h" /**************************************************************************** * Global Functions ****************************************************************************/ /**************************************************************************** * Function: setsockopt * * Description: * setsockopt() sets the option specified by the 'option' argument, * at the protocol level specified by the 'level' argument, to the value * pointed to by the 'value' argument for the socket associated with the * file descriptor specified by the 'sockfd' argument. * * The 'level' argument specifies the protocol level of the option. To set * options at the socket level, specify the level argument as SOL_SOCKET. * * See a complete list of values for the 'option' argument. * * Parameters: * sockfd Socket descriptor of socket * level Protocol level to set the option * option identifies the option to set * value Points to the argument value * value_len The length of the argument value * * Returned Value: * 0 on success; -1 on failure * * EBADF * The 'sockfd' argument is not a valid socket descriptor. * EDOM * The send and receive timeout values are too big to fit into the * timeout fields in the socket structure. * EINVAL * The specified option is invalid at the specified socket 'level' or the * socket has been shut down. * EISCONN * The socket is already connected, and a specified option cannot be set * while the socket is connected. * ENOPROTOOPT * The 'option' is not supported by the protocol. * ENOTSOCK * The 'sockfd' argument does not refer to a socket. * ENOMEM * There was insufficient memory available for the operation to complete. * ENOBUFS * Insufficient resources are available in the system to complete the * call. * * Assumptions: * ****************************************************************************/ int setsockopt(int sockfd, int level, int option, const void *value, socklen_t value_len) { FAR struct socket *psock; irqstate_t flags; int err; /* Get the underlying socket structure */ /* Verify that the sockfd corresponds to valid, allocated socket */ psock = sockfd_socket(sockfd); if (!psock || psock->s_crefs <= 0) { err = EBADF; goto errout; } /* Verify that the socket option if valid (but might not be supported ) */ if (!_SO_SETVALID(option) || !value) { err = EINVAL; goto errout; } /* Process the option */ switch (option) { /* The following options take a point to an integer boolean value. * We will blindly set the bit here although the implementation * is outside of the scope of setsockopt. */ case SO_DEBUG: /* Enables recording of debugging information */ case SO_BROADCAST: /* Permits sending of broadcast messages */ case SO_REUSEADDR: /* Allow reuse of local addresses */ case SO_KEEPALIVE: /* Keeps connections active by enabling the * periodic transmission */ case SO_OOBINLINE: /* Leaves received out-of-band data inline */ case SO_DONTROUTE: /* Requests outgoing messages bypass standard routing */ { int setting; /* Verify that option is the size of an 'int'. Should also check * that 'value' is properly aligned for an 'int' */ if (value_len != sizeof(int)) { err = EINVAL; goto errout; } /* Get the value. Is the option being set or cleared? */ setting = *(int*)value; /* Disable interrupts so that there is no conflict with interrupt * level access to options. */ flags = irqsave(); /* Set or clear the option bit */ if (setting) { _SO_SETOPT(psock->s_options, option); } else { _SO_CLROPT(psock->s_options, option); } } break; /* The following are valid only if the OS CLOCK feature is enabled */ case SO_RCVTIMEO: case SO_SNDTIMEO: #ifndef CONFIG_DISABLE_CLOCK { socktimeo_t timeo; /* Verify that option is the size of an 'struct timeval'. */ if (value_len != sizeof(struct timeval)) { err = EINVAL; goto errout; } /* Get the timeout value */ timeo = net_timeval2dsec((struct timeval *)value); /* Save the timeout value */ if (option == SO_RCVTIMEO) { psock->s_rcvtimeo = timeo; } else { psock->s_sndtimeo = timeo; } /* Set/clear the corresponding enable/disable bit */ if (timeo) { _SO_CLROPT(psock->s_options, option); } else { _SO_SETOPT(psock->s_options, option); } } break; #endif /* The following are not yet implemented */ case SO_LINGER: case SO_SNDBUF: /* Sets send buffer size */ case SO_RCVBUF: /* Sets receive buffer size */ case SO_RCVLOWAT: /* Sets the minimum number of bytes to input */ case SO_SNDLOWAT: /* Sets the minimum number of bytes to output */ /* There options are only valid when used with getopt */ case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */ case SO_ERROR: /* Reports and clears error status. */ case SO_TYPE: /* Reports the socket type */ default: err = ENOPROTOOPT; goto errout; } return OK; errout: *get_errno_ptr() = err; return ERROR; } #endif /* CONFIG_NET && CONFIG_NET_SOCKOPTS */