/**************************************************************************** * net/inet/inet_sockif.c * * SPDX-License-Identifier: Apache-2.0 * * 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 #include #include #include #include #include #include #include #include "tcp/tcp.h" #include "udp/udp.h" #include "icmp/icmp.h" #include "icmpv6/icmpv6.h" #include "sixlowpan/sixlowpan.h" #include "socket/socket.h" #include "inet/inet.h" #ifdef HAVE_INET_SOCKETS /**************************************************************************** * Private Type Definitions ****************************************************************************/ union sockaddr_u { struct sockaddr addr; struct sockaddr_in inaddr; struct sockaddr_in6 in6addr; }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ #if defined(NET_UDP_HAVE_STACK) || defined(NET_TCP_HAVE_STACK) static int inet_setup(FAR struct socket *psock); static sockcaps_t inet_sockcaps(FAR struct socket *psock); static void inet_addref(FAR struct socket *psock); static int inet_bind(FAR struct socket *psock, FAR const struct sockaddr *addr, socklen_t addrlen); static int inet_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen); static int inet_getpeername(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen); static int inet_listen(FAR struct socket *psock, int backlog); static int inet_connect(FAR struct socket *psock, FAR const struct sockaddr *addr, socklen_t addrlen); static int inet_accept(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen, FAR struct socket *newsock, int flags); static int inet_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup); static ssize_t inet_send(FAR struct socket *psock, FAR const void *buf, size_t len, int flags); static ssize_t inet_sendto(FAR struct socket *psock, FAR const void *buf, size_t len, int flags, FAR const struct sockaddr *to, socklen_t tolen); static ssize_t inet_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags); static ssize_t inet_recvmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags); static int inet_ioctl(FAR struct socket *psock, int cmd, unsigned long arg); static int inet_socketpair(FAR struct socket *psocks[2]); static int inet_shutdown(FAR struct socket *psock, int how); #ifdef CONFIG_NET_SOCKOPTS static int inet_getsockopt(FAR struct socket *psock, int level, int option, FAR void *value, FAR socklen_t *value_len); static int inet_setsockopt(FAR struct socket *psock, int level, int option, FAR const void *value, socklen_t value_len); #endif #ifdef CONFIG_NET_SENDFILE static ssize_t inet_sendfile(FAR struct socket *psock, FAR struct file *infile, FAR off_t *offset, size_t count); #endif /**************************************************************************** * Private Data ****************************************************************************/ static const struct sock_intf_s g_inet_sockif = { inet_setup, /* si_setup */ inet_sockcaps, /* si_sockcaps */ inet_addref, /* si_addref */ inet_bind, /* si_bind */ inet_getsockname, /* si_getsockname */ inet_getpeername, /* si_getpeername */ inet_listen, /* si_listen */ inet_connect, /* si_connect */ inet_accept, /* si_accept */ inet_poll, /* si_poll */ inet_sendmsg, /* si_sendmsg */ inet_recvmsg, /* si_recvmsg */ inet_close, /* si_close */ inet_ioctl, /* si_ioctl */ inet_socketpair, /* si_socketpair */ inet_shutdown /* si_shutdown */ #ifdef CONFIG_NET_SOCKOPTS , inet_getsockopt /* si_getsockopt */ , inet_setsockopt /* si_setsockopt */ #endif #ifdef CONFIG_NET_SENDFILE , inet_sendfile /* si_sendfile */ #endif }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: inet_tcp_alloc * * Description: * Allocate and attach a TCP connection structure. * ****************************************************************************/ #ifdef NET_TCP_HAVE_STACK static int inet_tcp_alloc(FAR struct socket *psock) { /* Allocate the TCP connection structure */ FAR struct tcp_conn_s *conn = tcp_alloc(psock->s_domain); if (conn == NULL) { /* Failed to reserve a connection structure */ nerr("ERROR: Failed to reserve TCP connection structure\n"); return -ENOMEM; } /* Set the reference count on the connection structure. This reference * count will be incremented only if the socket is dup'ed */ DEBUGASSERT(conn->crefs == 0); conn->crefs = 1; /* It is expected the socket has not yet been associated with * any other connection. */ DEBUGASSERT(psock->s_conn == NULL); /* Save the pre-allocated connection in the socket structure */ psock->s_conn = conn; return OK; } #endif /* NET_TCP_HAVE_STACK */ /**************************************************************************** * Name: inet_udp_alloc * * Description: * Allocate and attach a UDP connection structure. * ****************************************************************************/ #ifdef NET_UDP_HAVE_STACK static int inet_udp_alloc(FAR struct socket *psock) { /* Allocate the UDP connection structure */ FAR struct udp_conn_s *conn = udp_alloc(psock->s_domain); if (conn == NULL) { /* Failed to reserve a connection structure */ nerr("ERROR: Failed to reserve UDP connection structure\n"); return -ENOMEM; } /* Set the reference count on the connection structure. This reference * count will be incremented only if the socket is dup'ed */ DEBUGASSERT(conn->crefs == 0); conn->crefs = 1; /* Save the pre-allocated connection in the socket structure */ psock->s_conn = conn; return OK; } #endif /* NET_UDP_HAVE_STACK */ /**************************************************************************** * Name: inet_setup * * Description: * Called for socket() to verify that the provided socket type and * protocol are usable by this address family. Perform any family- * specific socket fields. * * NOTE: This is common logic for both the AF_INET and AF_INET6 address * families. * * Input Parameters: * psock A pointer to a user allocated socket structure to be * initialized. * protocol (see sys/socket.h) * * Returned Value: * Zero (OK) is returned on success. Otherwise, a negated errno value is * returned. * ****************************************************************************/ static int inet_setup(FAR struct socket *psock) { /* Allocate the appropriate connection structure. This reserves the * the connection structure is is unallocated at this point. It will * not actually be initialized until the socket is connected. * * REVISIT: Only SOCK_STREAM and SOCK_DGRAM are supported. */ switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: if (psock->s_proto != 0 && psock->s_proto != IPPROTO_TCP) { nerr("ERROR: Unsupported stream protocol: %d\n", psock->s_proto); return -EPROTONOSUPPORT; } #ifdef NET_TCP_HAVE_STACK /* Allocate and attach the TCP connection structure */ return inet_tcp_alloc(psock); #else nwarn("WARNING: SOCK_STREAM disabled\n"); return -ENETDOWN; #endif #endif /* CONFIG_NET_TCP */ #ifdef CONFIG_NET_UDP case SOCK_DGRAM: if (psock->s_proto != 0 && psock->s_proto != IPPROTO_UDP) { nerr("ERROR: Unsupported datagram protocol: %d\n", psock->s_proto); return -EPROTONOSUPPORT; } #ifdef NET_UDP_HAVE_STACK /* Allocate and attach the UDP connection structure */ return inet_udp_alloc(psock); #else nwarn("WARNING: SOCK_DGRAM disabled\n"); return -ENETDOWN; #endif #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) case SOCK_CTRL: # ifdef NET_TCP_HAVE_STACK if (psock->s_proto == 0 || psock->s_proto == IPPROTO_TCP) { /* Allocate and attach the TCP connection structure */ return inet_tcp_alloc(psock); } # endif # ifdef NET_UDP_HAVE_STACK if (psock->s_proto == 0 || psock->s_proto == IPPROTO_UDP) { /* Allocate and attach the UDP connection structure */ return inet_udp_alloc(psock); } # endif nerr("ERROR: Unsupported control protocol: %d\n", psock->s_proto); return -EPROTONOSUPPORT; #endif /* CONFIG_NET_TCP || CONFIG_NET_UDP */ default: nerr("ERROR: Unsupported type: %d\n", psock->s_type); return -EPROTONOSUPPORT; } } /**************************************************************************** * Name: inet_sockcaps * * Description: * Return the bit encoded capabilities of this socket. * * Input Parameters: * psock - Socket structure of the socket whose capabilities are being * queried. * * Returned Value: * The non-negative set of socket cababilities is returned. * ****************************************************************************/ static sockcaps_t inet_sockcaps(FAR struct socket *psock) { switch (psock->s_type) { #ifdef NET_TCP_HAVE_STACK case SOCK_STREAM: return SOCKCAP_NONBLOCKING; #endif #ifdef NET_UDP_HAVE_STACK case SOCK_DGRAM: return SOCKCAP_NONBLOCKING; #endif #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) case SOCK_CTRL: return SOCKCAP_NONBLOCKING; #endif default: return 0; } } /**************************************************************************** * Name: inet_addref * * Description: * Increment the reference count on the underlying connection structure. * * Input Parameters: * psock - Socket structure of the socket whose reference count will be * incremented. * * Returned Value: * None * ****************************************************************************/ static void inet_addref(FAR struct socket *psock) { DEBUGASSERT(psock != NULL && psock->s_conn != NULL); #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_TCP))) { FAR struct tcp_conn_s *conn = psock->s_conn; DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255); conn->crefs++; } else #endif #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_UDP))) { FAR struct udp_conn_s *conn = psock->s_conn; DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255); conn->crefs++; } else #endif { nerr("ERROR: Unsupported type: %d\n", psock->s_type); } } /**************************************************************************** * Name: inet_bind * * Description: * inet_bind() gives the socket 'psock' the local address 'addr'. 'addr' * is 'addrlen' bytes long. Traditionally, this is called "assigning a * name to a socket." When a socket is created with socket(), it exists * in a name space (address family) but has no name assigned. * * Input Parameters: * psock Socket structure of the socket to bind * addr Socket local address * addrlen Length of 'addr' * * Returned Value: * 0 on success; A negated errno value is returned on failure. See * bind() for a list a appropriate error values. * ****************************************************************************/ static int inet_bind(FAR struct socket *psock, FAR const struct sockaddr *addr, socklen_t addrlen) { int minlen; int ret; /* Verify that a valid address has been provided */ switch (addr->sa_family) { #ifdef CONFIG_NET_IPv4 case AF_INET: minlen = sizeof(struct sockaddr_in); break; #endif #ifdef CONFIG_NET_IPv6 case AF_INET6: minlen = sizeof(struct sockaddr_in6); break; #endif default: nerr("ERROR: Unrecognized address family: %d\n", addr->sa_family); return -EAFNOSUPPORT; } if (addrlen < minlen) { nerr("ERROR: Invalid address length: %d < %d\n", addrlen, minlen); return -EINVAL; } /* Perform the binding depending on the protocol type */ switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: { #ifdef NET_TCP_HAVE_STACK /* Bind a TCP/IP stream socket. */ ret = tcp_bind(psock->s_conn, addr); #else nwarn("WARNING: TCP/IP stack is not available in this " "configuration\n"); ret = -ENOSYS; #endif } break; #endif /* CONFIG_NET_TCP */ #ifdef CONFIG_NET_UDP case SOCK_DGRAM: { #ifdef NET_UDP_HAVE_STACK /* Bind a UDP/IP datagram socket */ ret = udp_bind(psock->s_conn, addr); #else nwarn("WARNING: UDP stack is not available in this " "configuration\n"); ret = -ENOSYS; #endif } break; #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) case SOCK_CTRL: { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); ret = -EOPNOTSUPP; } break; #endif default: nerr("ERROR: Unsupported socket type: %d\n", psock->s_type); ret = -EBADF; break; } return ret; } /**************************************************************************** * Name: inet_getsockname * * Description: * The inet_getsockname() function retrieves the locally-bound name of * the specified INET socket, stores this address in the sockaddr * structure pointed to by the 'addr' argument, and stores the length of * this address in the object pointed to by the 'addrlen' argument. * * If the actual length of the address is greater than the length of the * supplied sockaddr structure, the stored address will be truncated. * * If the socket has not been bound to a local name, the value stored in * the object pointed to by address is unspecified. * * Input Parameters: * psock Socket structure of the socket to be queried * addr sockaddr structure to receive data [out] * addrlen Length of sockaddr structure [in/out] * * Returned Value: * On success, 0 is returned, the 'addr' argument points to the address * of the socket, and the 'addrlen' argument points to the length of the * address. Otherwise, a negated errno value is returned. See * getsockname() for the list of appropriate error numbers. * ****************************************************************************/ static int inet_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { /* Handle by address domain */ switch (psock->s_domain) { #ifdef CONFIG_NET_IPv4 case PF_INET: return ipv4_getsockname(psock, addr, addrlen); break; #endif #ifdef CONFIG_NET_IPv6 case PF_INET6: return ipv6_getsockname(psock, addr, addrlen); break; #endif default: return -EAFNOSUPPORT; } } /**************************************************************************** * Name: inet_getpeername * * Description: * The inet_getpeername() function retrieves the remote-connected name of * the specified INET socket, stores this address in the sockaddr * structure pointed to by the 'addr' argument, and stores the length of * this address in the object pointed to by the 'addrlen' argument. * * If the actual length of the address is greater than the length of the * supplied sockaddr structure, the stored address will be truncated. * * If the socket has not been bound to a local name, the value stored in * the object pointed to by address is unspecified. * * Parameters: * psock Socket structure of the socket to be queried * addr sockaddr structure to receive data [out] * addrlen Length of sockaddr structure [in/out] * * Returned Value: * On success, 0 is returned, the 'addr' argument points to the address * of the socket, and the 'addrlen' argument points to the length of the * address. Otherwise, a negated errno value is returned. See * getpeername() for the list of appropriate error numbers. * ****************************************************************************/ static int inet_getpeername(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { /* Handle by address domain */ switch (psock->s_domain) { #ifdef CONFIG_NET_IPv4 case PF_INET: return ipv4_getpeername(psock, addr, addrlen); break; #endif #ifdef CONFIG_NET_IPv6 case PF_INET6: return ipv6_getpeername(psock, addr, addrlen); break; #endif default: return -EAFNOSUPPORT; } } #ifdef CONFIG_NET_SOCKOPTS /**************************************************************************** * Name: inet_get_socketlevel_option * * Description: * inet_get_socketlevel_option() retrieve the value for the option * specified by the 'option' argument for the socket specified by the * 'psock' argument. If the size of the option value is greater than * 'value_len', the value stored in the object pointed to by the 'value' * argument will be silently truncated. Otherwise, the length pointed to * by the 'value_len' argument will be modified to indicate the actual * length of the 'value'. * * The 'level' argument specifies the protocol level of the option. To * retrieve options at the socket level, specify the level argument as * SOL_SOCKET; to retrieve options at the TCP-protocol level, the level * argument is SOL_TCP. * * See a complete list of values for the socket-level * 'option' argument. Protocol-specific options are are protocol specific * header files (such as netinet/tcp.h for the case of the TCP protocol). * * Input Parameters: * psock Socket structure of the socket to query * level Protocol level to set the option * option identifies the option to get * value Points to the argument value * value_len The length of the argument value * * Returned Value: * Returns zero (OK) on success. On failure, it returns a negated errno * value to indicate the nature of the error. See psock_getsockopt() for * the complete list of appropriate return error codes. * ****************************************************************************/ static int inet_get_socketlevel_option(FAR struct socket *psock, int option, FAR void *value, FAR socklen_t *value_len) { switch (option) { #if CONFIG_NET_RECV_BUFSIZE > 0 case SO_RCVBUF: /* Reports receive buffer size */ { if (*value_len != sizeof(int)) { return -EINVAL; } #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { FAR struct tcp_conn_s *tcp = psock->s_conn; *(FAR int *)value = tcp->rcv_bufs; } else #endif #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { FAR struct udp_conn_s *udp = psock->s_conn; *(FAR int *)value = udp->rcvbufs; } else #endif { return -ENOPROTOOPT; } } break; #endif #if CONFIG_NET_SEND_BUFSIZE > 0 case SO_SNDBUF: /* Reports send buffer size */ { if (*value_len != sizeof(int)) { return -EINVAL; } #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { FAR struct tcp_conn_s *tcp = psock->s_conn; *(FAR int *)value = tcp->snd_bufs; } else #endif #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { FAR struct udp_conn_s *udp = psock->s_conn; /* Save the send buffer size */ *(FAR int *)value = udp->sndbufs; } else #endif { return -ENOPROTOOPT; } } break; #endif #ifdef CONFIG_NET_TCPPROTO_OPTIONS case SO_KEEPALIVE: { /* Any connection-oriented protocol could potentially support * SO_KEEPALIVE. However, this option is currently only available * for TCP/IP. * * NOTE: SO_KEEPALIVE is not really a socket-level option; it is a * protocol-level option. A given TCP connection may service * multiple sockets (via dup'ing of the socket). There is, however, * still only one connection to be monitored and that is a global * attribute across all of the clones that may use the underlying * connection. */ /* Verifies TCP connections active by enabling the periodic * transmission of probes. */ return tcp_getsockopt(psock, option, value, value_len); } #endif #ifdef CONFIG_NET_TIMESTAMP case SO_TIMESTAMP: { if (*value_len != sizeof(int)) { return -EINVAL; } if (psock->s_type == SOCK_DGRAM) { FAR struct udp_conn_s *conn = psock->s_conn; *(FAR int *)value = (conn->timestamp != 0); } else { return -ENOPROTOOPT; } } break; #endif default: return -ENOPROTOOPT; } return OK; } /**************************************************************************** * Name: inet_getsockopt * * Description: * inet_getsockopt() retrieve the value for the option specified by the * 'option' argument at the protocol level specified by the 'level' * argument. If the size of the option value is greater than 'value_len', * the value stored in the object pointed to by the 'value' argument will * be silently truncated. Otherwise, the length pointed to by the * 'value_len' argument will be modified to indicate the actual length * of the 'value'. * * The 'level' argument specifies the protocol level of the option. To * retrieve options at the socket level, specify the level argument as * SOL_SOCKET. * * See a complete list of values for the 'option' argument. * * Input Parameters: * psock Socket structure of the socket to query * level Protocol level to set the option * option identifies the option to get * value Points to the argument value * value_len The length of the argument value * ****************************************************************************/ static int inet_getsockopt(FAR struct socket *psock, int level, int option, FAR void *value, FAR socklen_t *value_len) { switch (level) { case SOL_SOCKET: return inet_get_socketlevel_option(psock, option, value, value_len); #ifdef CONFIG_NET_TCPPROTO_OPTIONS case IPPROTO_TCP: return tcp_getsockopt(psock, option, value, value_len); #endif #ifdef CONFIG_NET_IPv4 case IPPROTO_IP:/* IPv4 protocol socket options (see include/netinet/in.h) */ return ipv4_getsockopt(psock, option, value, value_len); #endif #ifdef CONFIG_NET_IPv6 case IPPROTO_IPV6:/* IPv6 protocol socket options (see include/netinet/in.h) */ return ipv6_getsockopt(psock, option, value, value_len); #endif default: return -ENOPROTOOPT; } } /**************************************************************************** * Name: inet_set_socketlevel_option * * Description: * inet_set_socketlevel_option() sets the socket-level option specified by * the 'option' argument to the value pointed to by the 'value' argument * for the socket specified by the 'psock' argument. * * See a complete list of values for the socket level * 'option' argument. * * Input Parameters: * psock Socket structure of socket to operate on * option identifies the option to set * value Points to the argument value * value_len The length of the argument value * * Returned Value: * Returns zero (OK) on success. On failure, it returns a negated errno * value to indicate the nature of the error. See psock_setcockopt() for * the list of possible error values. * ****************************************************************************/ static int inet_set_socketlevel_option(FAR struct socket *psock, int option, FAR const void *value, socklen_t value_len) { switch (option) { #ifdef CONFIG_NET_TCPPROTO_OPTIONS case SO_KEEPALIVE: { /* Any connection-oriented protocol could potentially support * SO_KEEPALIVE. However, this option is currently only available * for TCP/IP. * * NOTE: SO_KEEPALIVE is not really a socket-level option; it is a * protocol-level option. A given TCP connection may service * multiple sockets (via dup'ing of the socket). There is, however, * still only one connection to be monitored and that is a global * attribute across all of the clones that may use the underlying * connection. */ /* Verifies TCP connections active by enabling the * periodic transmission of probes */ return tcp_setsockopt(psock, option, value, value_len); } #endif #ifdef CONFIG_NET_SOLINGER case SO_LINGER: { /* Lingers on a close() if data is present */ FAR struct socket_conn_s *conn = psock->s_conn; FAR struct linger *setting; /* Verify that option is at least the size of an 'struct linger'. */ if (value_len < sizeof(struct linger)) { return -EINVAL; } /* Get the value. Is the option being set or cleared? */ setting = (FAR struct linger *)value; /* Lock the network so that we have exclusive access to the socket * options. */ net_lock(); /* Set or clear the linger option bit and linger time * (in deciseconds) */ if (setting->l_onoff) { _SO_SETOPT(conn->s_options, option); conn->s_linger = 10 * setting->l_linger; } else { _SO_CLROPT(conn->s_options, option); conn->s_linger = 0; } net_unlock(); } break; #endif #if CONFIG_NET_RECV_BUFSIZE > 0 case SO_RCVBUF: /* Sets receive buffer size */ { int buffersize; /* 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)) { return -EINVAL; } /* Get the value. Is the option being set or cleared? */ buffersize = *(FAR int *)value; if (buffersize < 0) { return -EINVAL; } #if CONFIG_NET_MAX_RECV_BUFSIZE > 0 buffersize = MIN(buffersize, CONFIG_NET_MAX_RECV_BUFSIZE); #endif net_lock(); #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { FAR struct tcp_conn_s *tcp = psock->s_conn; /* Save the receive buffer size */ tcp->rcv_bufs = buffersize; } else #endif #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { FAR struct udp_conn_s *udp = psock->s_conn; /* Save the receive buffer size */ udp->rcvbufs = buffersize; } else #endif { net_unlock(); return -ENOPROTOOPT; } net_unlock(); } break; #endif #if CONFIG_NET_SEND_BUFSIZE > 0 case SO_SNDBUF: /* Sets send buffer size */ { int buffersize; /* 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)) { return -EINVAL; } /* Get the value. Is the option being set or cleared? */ buffersize = *(FAR int *)value; if (buffersize < 0) { return -EINVAL; } #if CONFIG_NET_MAX_SEND_BUFSIZE > 0 buffersize = MIN(buffersize, CONFIG_NET_MAX_SEND_BUFSIZE); #endif net_lock(); #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { FAR struct tcp_conn_s *tcp = psock->s_conn; /* Save the send buffer size */ tcp->snd_bufs = buffersize; } else #endif #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { FAR struct udp_conn_s *udp = psock->s_conn; /* Save the send buffer size */ udp->sndbufs = buffersize; } else #endif { net_unlock(); return -ENOPROTOOPT; } net_unlock(); } break; #endif #ifdef CONFIG_NET_TIMESTAMP case SO_TIMESTAMP: /* Report receive timestamps as cmsg */ { if (value_len < sizeof(int)) { return -EINVAL; } if (psock->s_type == SOCK_DGRAM) { net_lock(); /* For now the timestamp enable is just boolean. * If SO_TIMESTAMPING support is added in future, it can be * expanded to flags field for rx/tx timestamps. */ FAR struct udp_conn_s *conn = psock->s_conn; conn->timestamp = (*((FAR int *)value) != 0); net_unlock(); } else { return -ENOPROTOOPT; } } break; #endif default: return -ENOPROTOOPT; } return OK; } /**************************************************************************** * Name: inet_setsockopt * * Description: * inet_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 connection. * * 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. * * Input Parameters: * psock Socket structure of the socket to query * 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 * ****************************************************************************/ static int inet_setsockopt(FAR struct socket *psock, int level, int option, FAR const void *value, socklen_t value_len) { switch (level) { case SOL_SOCKET: return inet_set_socketlevel_option(psock, option, value, value_len); #ifdef CONFIG_NET_TCPPROTO_OPTIONS case IPPROTO_TCP:/* TCP protocol socket options (see include/netinet/tcp.h) */ return tcp_setsockopt(psock, option, value, value_len); #endif #ifdef CONFIG_NET_UDPPROTO_OPTIONS case IPPROTO_UDP:/* UDP protocol socket options (see include/netinet/udp.h) */ return udp_setsockopt(psock, option, value, value_len); #endif #ifdef CONFIG_NET_IPv4 case IPPROTO_IP:/* IPv4 protocol socket options (see include/netinet/in.h) */ return ipv4_setsockopt(psock, option, value, value_len); #endif #ifdef CONFIG_NET_IPv6 case IPPROTO_IPV6:/* IPv6 protocol socket options (see include/netinet/in.h) */ return ipv6_setsockopt(psock, option, value, value_len); #endif default: return -ENOPROTOOPT; } } #endif /**************************************************************************** * Name: inet_listen * * Description: * To accept connections, a socket is first created with psock_socket(), a * willingness to accept incoming connections and a queue limit for * incoming connections are specified with psock_listen(), and then the * connections are accepted with psock_accept(). For the case of AFINET * and AFINET6 sockets, psock_listen() calls this function. The * psock_listen() call applies only to sockets of type SOCK_STREAM or * SOCK_SEQPACKET. * * Input Parameters: * psock Reference to an internal, boound socket structure. * backlog The maximum length the queue of pending connections may grow. * If a connection request arrives with the queue full, the client * may receive an error with an indication of ECONNREFUSED or, * if the underlying protocol supports retransmission, the request * may be ignored so that retries succeed. * * Returned Value: * On success, zero is returned. On error, a negated errno value is * returned. See listen() for the set of appropriate error values. * ****************************************************************************/ static int inet_listen(FAR struct socket *psock, int backlog) { #if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK) FAR struct tcp_conn_s *conn; int ret; #endif /* Verify that the sockfd corresponds to a connected SOCK_STREAM */ if (psock->s_type != SOCK_STREAM) { nerr("ERROR: Unsupported socket type: %d\n", psock->s_type); return -EOPNOTSUPP; } #ifdef CONFIG_NET_TCP #ifdef NET_TCP_HAVE_STACK conn = psock->s_conn; if (conn->lport == 0) { #ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv6 if (conn->domain == PF_INET) #endif { /* Select a port that is unique for this IPv4 local address * (network order). */ conn->lport = tcp_selectport(PF_INET, (FAR const union ip_addr_u *) &conn->u.ipv4.laddr, 0); } #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv4 else #endif { /* Select a port that is unique for this IPv6 local address * (network order). */ conn->lport = tcp_selectport(PF_INET6, (FAR const union ip_addr_u *) conn->u.ipv6.laddr, 0); } #endif /* CONFIG_NET_IPv6 */ } #ifdef CONFIG_NET_TCPBACKLOG /* Set up the backlog for this connection */ ret = tcp_backlogcreate(conn, backlog); if (ret < 0) { nerr("ERROR: tcp_backlogcreate failed: %d\n", ret); return ret; } #endif /* Start listening to the bound port. This enables callbacks when * accept() is called and enables poll()/select() logic. */ ret = tcp_listen(conn); if (ret < 0) { nerr("ERROR: tcp_listen failed: %d\n", ret); } return ret; #else nwarn("WARNING: Stream socket support not available\n"); return -EOPNOTSUPP; #endif /* NET_TCP_HAVE_STACK */ #else nwarn("WARNING: Stream socket support not enabled\n"); return -EOPNOTSUPP; #endif /* CONFIG_NET_TCP */ } /**************************************************************************** * Name: inet_connect * * Description: * inet_connect() connects the local socket referred to by the structure * 'psock' to the address specified by 'addr'. The addrlen argument * specifies the size of 'addr'. The format of the address in 'addr' is * determined by the address space of the socket 'psock'. * * If the socket 'psock' is of type SOCK_DGRAM then 'addr' is the address * to which datagrams are sent by default, and the only address from which * datagrams are received. If the socket is of type SOCK_STREAM or * SOCK_SEQPACKET, this call attempts to make a connection to the socket * that is bound to the address specified by 'addr'. * * Generally, connection-based protocol sockets may successfully * inet_connect() only once; connectionless protocol sockets may use * inet_connect() multiple times to change their association. * Connectionless sockets may dissolve the association by connecting to * an address with the sa_family member of sockaddr set to AF_UNSPEC. * * Input Parameters: * psock - Pointer to a socket structure initialized by psock_socket() * addr - Server address (form depends on type of socket). The upper * socket layer has verified that this address is non-NULL. * addrlen - Length of actual 'addr' * * Returned Value: * 0 on success; a negated errno value on failure. See connect() for the * list of appropriate errno values to be returned. * ****************************************************************************/ static int inet_connect(FAR struct socket *psock, FAR const struct sockaddr *addr, socklen_t addrlen) { FAR const struct sockaddr_in *inaddr = (FAR const struct sockaddr_in *)addr; /* Verify that a valid address has been provided */ switch (inaddr->sin_family) { #ifdef CONFIG_NET_IPv4 case AF_INET: { if (addrlen < sizeof(struct sockaddr_in)) { return -EINVAL; } } break; #endif #ifdef CONFIG_NET_IPv6 case AF_INET6: { if (addrlen < sizeof(struct sockaddr_in6)) { return -EINVAL; } } break; #endif case AF_UNSPEC: break; default: DEBUGPANIC(); return -EAFNOSUPPORT; } /* Perform the connection depending on the protocol type */ switch (psock->s_type) { #if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK) case SOCK_STREAM: { FAR struct tcp_conn_s *conn = psock->s_conn; /* Verify that the socket is not already connected */ if (_SS_ISCONNECTED(conn->sconn.s_flags)) { return -EISCONN; } #if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6) if (conn->domain != addr->sa_family) { nerr("conn's domain must be the same as addr's family!\n"); return -EPROTOTYPE; } #endif /* It's not ... Connect the TCP/IP socket */ return psock_tcp_connect(psock, addr); } #endif /* CONFIG_NET_TCP */ #if defined(CONFIG_NET_UDP) && defined(NET_UDP_HAVE_STACK) case SOCK_DGRAM: { FAR struct udp_conn_s *conn; int ret; /* We will accept connecting to a addr == NULL for disconnection. * However, the correct way is to disconnect is to provide an * address with sa_family == AF_UNSPEC. */ if (addr != NULL && addr->sa_family == AF_UNSPEC) { addr = NULL; } /* Perform the connect/disconnect operation */ conn = psock->s_conn; #if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6) if (addr != NULL && conn->domain != addr->sa_family) { nerr("conn's domain must be the same as addr's family!\n"); return -EPROTOTYPE; } #endif ret = udp_connect(conn, addr); if (ret < 0 || addr == NULL) { /* Failed to connect or explicitly disconnected */ conn->sconn.s_flags &= ~_SF_CONNECTED; conn->flags &= ~_UDP_FLAG_CONNECTMODE; } else { /* Successfully connected */ conn->sconn.s_flags |= _SF_CONNECTED; conn->flags |= _UDP_FLAG_CONNECTMODE; } return ret; } #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) && defined(CONFIG_NET_UDP) case SOCK_CTRL: { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); return -EOPNOTSUPP; } #endif default: return -EBADF; } } /**************************************************************************** * Name: inet_accept * * Description: * The inet_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 inet_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, inet_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, inet_accept returns * EAGAIN. * * Input Parameters: * psock Reference to the listening socket structure * addr Receives the address of the connecting client * addrlen Input: allocated size of 'addr', Return: returned size of * 'addr' * newsock Location to return the accepted socket information. * * Returned Value: * Returns 0 (OK) on success. On failure, it returns a negated errno * value. See accept() for a description of the appropriate error value. * * Assumptions: * The network is locked. * ****************************************************************************/ static int inet_accept(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen, FAR struct socket *newsock, int flags) { #if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK) int ret; #endif /* Is the socket a stream? */ if (psock->s_type != SOCK_STREAM) { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); return -EOPNOTSUPP; } /* Verify that a valid memory block has been provided to receive the * address */ if (addr != NULL) { /* If an address is provided, then the length must also be provided. */ DEBUGASSERT(*addrlen > 0); /* A valid length depends on the address domain */ switch (psock->s_domain) { #ifdef CONFIG_NET_IPv4 case PF_INET: { if (*addrlen < sizeof(struct sockaddr_in)) { return -EINVAL; } } break; #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 case PF_INET6: { if (*addrlen < sizeof(struct sockaddr_in6)) { return -EINVAL; } } break; #endif /* CONFIG_NET_IPv6 */ default: DEBUGPANIC(); return -EINVAL; } } /* Initialize the socket structure. */ newsock->s_domain = psock->s_domain; newsock->s_type = SOCK_STREAM; newsock->s_sockif = psock->s_sockif; /* Perform the correct accept operation for this address domain */ #ifdef CONFIG_NET_TCP #ifdef NET_TCP_HAVE_STACK /* Perform the local accept operation (the network locked must be locked * by the caller). */ ret = psock_tcp_accept(psock, addr, addrlen, &newsock->s_conn); if (ret < 0) { nerr("ERROR: psock_tcp_accept failed: %d\n", ret); return ret; } /* Begin monitoring for TCP connection events on the newly connected * socket */ ret = tcp_start_monitor(newsock); if (ret < 0) { /* tcp_start_monitor() can only fail on certain race conditions where * the connection was lost just before this function was called. Undo * everything we have done and return a failure. */ psock_close(newsock); } return ret; #else nwarn("WARNING: SOCK_STREAM not supported in this configuration\n"); return -EOPNOTSUPP; #endif /* NET_TCP_HAVE_STACK */ #else nwarn("WARNING: TCP/IP not supported in this configuration\n"); return -EOPNOTSUPP; #endif /* CONFIG_NET_TCP */ } /**************************************************************************** * Name: inet_pollsetup * * Description: * Setup to monitor events on one socket * * Input Parameters: * psock - The socket of interest * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) static inline int inet_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds) { #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { return tcp_pollsetup(psock, fds); } else #endif /* NET_TCP_HAVE_STACK */ #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { return udp_pollsetup(psock, fds); } else #endif /* NET_UDP_HAVE_STACK */ #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) if (psock->s_type == SOCK_CTRL) { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); return -EOPNOTSUPP; } else #endif { return -ENOSYS; } } #endif /* NET_TCP_HAVE_STACK || NET_UDP_HAVE_STACK */ /**************************************************************************** * Name: inet_pollteardown * * Description: * Teardown monitoring of events on an socket * * Input Parameters: * psock - The TCP/IP socket of interest * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) static inline int inet_pollteardown(FAR struct socket *psock, FAR struct pollfd *fds) { #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { return tcp_pollteardown(psock, fds); } else #endif /* NET_TCP_HAVE_STACK */ #ifdef NET_UDP_HAVE_STACK if (psock->s_type == SOCK_DGRAM) { return udp_pollteardown(psock, fds); } else #endif /* NET_UDP_HAVE_STACK */ #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) if (psock->s_type == SOCK_CTRL) { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); return -EOPNOTSUPP; } else #endif { return -ENOSYS; } } #endif /* NET_TCP_HAVE_STACK || NET_UDP_HAVE_STACK */ /**************************************************************************** * Name: inet_poll * * Description: * The standard poll() operation redirects operations on socket descriptors * to net_poll which, indiectly, calls to function. * * Input Parameters: * psock - An instance of the internal socket structure. * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * setup - true: Setup up the poll; false: Teardown the poll * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ static int inet_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup) { #if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK) /* Check if we are setting up or tearing down the poll */ if (setup) { /* Perform the TCP/IP poll() setup */ return inet_pollsetup(psock, fds); } else { /* Perform the TCP/IP poll() teardown */ return inet_pollteardown(psock, fds); } #else { return -ENOSYS; } #endif /* NET_TCP_HAVE_STACK || !NET_UDP_HAVE_STACK */ } /**************************************************************************** * Name: inet_send * * Description: * The inet_send() call may be used only when the socket is in a connected * state (so that the intended recipient is known). * * Input Parameters: * psock An instance of the internal socket structure. * buf Data to send * len Length of data to send * flags Send flags * * Returned Value: * On success, returns the number of characters sent. On error, a negated * errno value is returned (see send() for the list of appropriate error * values. * ****************************************************************************/ static ssize_t inet_send(FAR struct socket *psock, FAR const void *buf, size_t len, int flags) { #ifdef NET_UDP_HAVE_STACK FAR struct socket_conn_s *conn = psock->s_conn; #endif ssize_t ret; switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: { #ifdef CONFIG_NET_6LOWPAN /* Try 6LoWPAN TCP packet send */ ret = psock_6lowpan_tcp_send(psock, buf, len); #ifdef NET_TCP_HAVE_STACK if (ret < 0) { /* TCP/IP packet send */ ret = psock_tcp_send(psock, buf, len, flags); } #endif /* NET_TCP_HAVE_STACK */ #elif defined(NET_TCP_HAVE_STACK) ret = psock_tcp_send(psock, buf, len, flags); #else ret = -ENOSYS; #endif /* CONFIG_NET_6LOWPAN */ } break; #endif /* CONFIG_NET_TCP */ #ifdef CONFIG_NET_UDP case SOCK_DGRAM: { #if defined(CONFIG_NET_6LOWPAN) /* Try 6LoWPAN UDP packet send */ ret = psock_6lowpan_udp_send(psock, buf, len); #ifdef NET_UDP_HAVE_STACK if (ret < 0) { /* UDP/IP packet send */ ret = _SS_ISCONNECTED(conn->s_flags) ? psock_udp_sendto(psock, buf, len, 0, NULL, 0) : -ENOTCONN; } #endif /* NET_UDP_HAVE_STACK */ #elif defined(NET_UDP_HAVE_STACK) /* Only UDP/IP packet send */ ret = _SS_ISCONNECTED(conn->s_flags) ? psock_udp_sendto(psock, buf, len, 0, NULL, 0) : -ENOTCONN; #else ret = -ENOSYS; #endif /* CONFIG_NET_6LOWPAN */ } break; #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) case SOCK_CTRL: { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); ret = -EOPNOTSUPP; } break; #endif default: { /* EDESTADDRREQ. Signifies that the socket is not connection-mode * and no peer address is set. */ nerr("ERROR: Bad socket type: %d\n", psock->s_type); ret = -EDESTADDRREQ; } break; } return ret; } /**************************************************************************** * Name: inet_sendto * * Description: * Implements the sendto() operation for the case of the AF_INET and * AF_INET6 sockets. * * Input Parameters: * psock A pointer to a NuttX-specific, internal socket structure * buf Data to send * len Length of data to send * flags Send flags * to Address of recipient * tolen The length of the address structure * * Returned Value: * On success, returns the number of characters sent. On error, a negated * errno value is returned (see send_to() for the list of appropriate error * values. * ****************************************************************************/ static ssize_t inet_sendto(FAR struct socket *psock, FAR const void *buf, size_t len, int flags, FAR const struct sockaddr *to, socklen_t tolen) { socklen_t minlen; ssize_t nsent; /* Verify that a valid address has been provided */ switch (to->sa_family) { #ifdef CONFIG_NET_IPv4 case AF_INET: minlen = sizeof(struct sockaddr_in); break; #endif #ifdef CONFIG_NET_IPv6 case AF_INET6: minlen = sizeof(struct sockaddr_in6); break; #endif default: nerr("ERROR: Unrecognized address family: %d\n", to->sa_family); return -EAFNOSUPPORT; } if (tolen < minlen) { nerr("ERROR: Invalid address length: %d < %d\n", tolen, minlen); return -EBADF; } #ifdef CONFIG_NET_UDP if (psock->s_type != SOCK_DGRAM) { nerr("ERROR: Inappropriate socket type %d\n", psock->s_type); return -EBADF; } /* Now handle the INET sendto() operation */ #if defined(CONFIG_NET_6LOWPAN) /* Try 6LoWPAN UDP packet sendto() */ nsent = psock_6lowpan_udp_sendto(psock, buf, len, flags, to, minlen); #ifdef NET_UDP_HAVE_STACK if (nsent < 0) { /* UDP/IP packet sendto */ nsent = psock_udp_sendto(psock, buf, len, flags, to, tolen); } #endif /* NET_UDP_HAVE_STACK */ #elif defined(NET_UDP_HAVE_STACK) nsent = psock_udp_sendto(psock, buf, len, flags, to, tolen); #else nwarn("WARNING: UDP not available in this configuiration\n"); nsent = -ENOSYS; #endif /* CONFIG_NET_6LOWPAN */ #else nwarn("WARNING: UDP not enabled in this configuiration\n"); nsent = -EISCONN; #endif /* CONFIG_NET_UDP */ return nsent; } /**************************************************************************** * Name: inet_sendmsg * * Description: * The inet_send() call may be used only when the socket is in a connected * state (so that the intended recipient is known). * * Input Parameters: * psock An instance of the internal socket structure. * msg Message to send * flags Send flags * * Returned Value: * On success, returns the number of characters sent. On error, a negated * errno value is returned (see sendmsg() for the list of appropriate error * values. * ****************************************************************************/ static ssize_t inet_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags) { FAR void *buf = msg->msg_iov->iov_base; size_t len = msg->msg_iov->iov_len; FAR const struct sockaddr *to = msg->msg_name; socklen_t tolen = msg->msg_namelen; FAR const struct iovec *iov; FAR const struct iovec *end; int ret; if (msg->msg_iovlen == 1) { return to ? inet_sendto(psock, buf, len, flags, to, tolen) : inet_send(psock, buf, len, flags); } end = &msg->msg_iov[msg->msg_iovlen]; for (len = 0, iov = msg->msg_iov; iov != end; iov++) { len += iov->iov_len; } buf = kmm_malloc(len); if (buf == NULL) { return -ENOMEM; } for (len = 0, iov = msg->msg_iov; iov != end; iov++) { if (iov->iov_len == 0 || iov->iov_base == NULL) { continue; } memcpy(((unsigned char *)buf) + len, iov->iov_base, iov->iov_len); len += iov->iov_len; } ret = to ? inet_sendto(psock, buf, len, flags, to, tolen) : inet_send(psock, buf, len, flags); kmm_free(buf); return ret; } /**************************************************************************** * Name: inet_ioctl * * Description: * This function performs network device specific operations. * * Parameters: * psock A reference to the socket structure of the socket * cmd The ioctl command * arg The argument of the ioctl cmd * ****************************************************************************/ static int inet_ioctl(FAR struct socket *psock, int cmd, unsigned long arg) { /* Verify that the sockfd corresponds to valid, allocated socket */ if (psock == NULL || psock->s_conn == NULL) { return -EBADF; } #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_TCP))) { return tcp_ioctl(psock->s_conn, cmd, arg); } #endif #if defined(CONFIG_NET_UDP) && defined(NET_UDP_HAVE_STACK) if (psock->s_type == SOCK_DGRAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_UDP))) { return udp_ioctl(psock->s_conn, cmd, arg); } #endif return -EINVAL; } /**************************************************************************** * Name: inet_socketpair * * Description: * Create a pair of connected sockets between psocks[2] * * Parameters: * psocks A reference to the socket structure of the socket pair * ****************************************************************************/ static int inet_socketpair(FAR struct socket *psocks[2]) { #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) FAR struct socket *pserver = psocks[1]; #if defined(CONFIG_NET_TCP) FAR struct socket server; #endif union sockaddr_u addr[2]; socklen_t len; int ret; /* Set the sock address to localhost */ #ifdef CONFIG_NET_IPv6 if (psocks[0]->s_domain == AF_INET6) { struct in6_addr init_sin6_addr = IN6ADDR_LOOPBACK_INIT; len = sizeof(addr[0].in6addr); memset(&addr[0], 0, len); addr[0].in6addr.sin6_family = psocks[0]->s_domain; addr[0].in6addr.sin6_addr = init_sin6_addr; } else #endif { len = sizeof(addr[0].inaddr); memset(&addr[0], 0, len); addr[0].inaddr.sin_family = psocks[0]->s_domain; addr[0].inaddr.sin_addr.s_addr = HTONL(INADDR_LOOPBACK); } memcpy(&addr[1], &addr[0], len); ret = psock_bind(psocks[0], &addr[0].addr, len); if (ret < 0) { return ret; } psock_getsockname(psocks[0], &addr[0].addr, &len); /* For SOCK_STREAM, Use proxy service handle to make temporary * pserver process, psocks[1] will be replaced with a new accept handle */ #if defined(CONFIG_NET_TCP) if (psocks[0]->s_type == SOCK_STREAM) { ret = psock_socket(psocks[1]->s_domain, psocks[1]->s_type, psocks[1]->s_proto, &server); if (ret < 0) { return ret; } pserver = &server; } #endif /* CONFIG_NET_TCP */ ret = psock_bind(pserver, &addr[1].addr, len); if (ret < 0) { goto errout; } psock_getsockname(pserver, &addr[1].addr, &len); #if defined(CONFIG_NET_UDP) if (psocks[0]->s_type == SOCK_DGRAM) { ret = psock_connect(psocks[0], &addr[1].addr, len); if (ret < 0) { goto errout; } ret = psock_connect(pserver, &addr[0].addr, len); if (ret < 0) { goto errout; } } #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) if (psocks[0]->s_type == SOCK_STREAM) { FAR struct socket_conn_s *conn = psocks[1]->s_conn; ret = psock_listen(pserver, 2); if (ret < 0) { goto errout; } ret = psock_connect(psocks[0], &addr[1].addr, len); if (ret < 0) { goto errout; } /* Release the resource of psocks[1], accept will replace * this handle */ psock_close(psocks[1]); ret = psock_accept(pserver, &addr[1].addr, &len, psocks[1], conn->s_flags & _SF_NONBLOCK ? SOCK_NONBLOCK : 0); } #endif /* CONFIG_NET_TCP */ errout: #if defined(CONFIG_NET_TCP) if (pserver->s_type == SOCK_STREAM) { psock_close(pserver); } #endif /* CONFIG_NET_TCP */ return ret; #else return -EOPNOTSUPP; #endif /* CONFIG_NET_TCP || CONFIG_NET_UDP */ } /**************************************************************************** * Name: inet_shutdown * * Description: * Performs the shutdown operation on an AF_INET or AF_INET6 socket * * Input Parameters: * psock Socket instance * how Specifies the type of shutdown * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ static int inet_shutdown(FAR struct socket *psock, int how) { switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: #ifdef NET_TCP_HAVE_STACK return tcp_shutdown(psock, how); #else nwarn("WARNING: SOCK_STREAM support is not available in this " "configuration\n"); return -EAFNOSUPPORT; #endif /* NET_TCP_HAVE_STACK */ #endif /* CONFIG_NET_TCP */ default: return -EOPNOTSUPP; } } /**************************************************************************** * Name: inet_sendfile * * Description: * The inet_sendfile() call may be used only when the INET socket is in a * connected state (so that the intended recipient is known). * * Input Parameters: * psock An instance of the internal socket structure. * buf Data to send * len Length of data to send * flags Send flags * * Returned Value: * On success, returns the number of characters sent. On error, * a negated errno value is returned. See sendfile() for a list * appropriate error return values. * ****************************************************************************/ #ifdef CONFIG_NET_SENDFILE static ssize_t inet_sendfile(FAR struct socket *psock, FAR struct file *infile, FAR off_t *offset, size_t count) { #ifdef NET_TCP_HAVE_STACK if (psock->s_type == SOCK_STREAM) { return tcp_sendfile(psock, infile, offset, count); } #endif return -ENOSYS; } #endif /**************************************************************************** * Name: inet_recvmsg * * Description: * Implements the socket recvfrom interface for the case of the AF_INET * and AF_INET6 address families. inet_recvmsg() receives messages from * a socket, and may be used to receive data on a socket whether or not it * is connection-oriented. * * If msg_name is not NULL, and the underlying protocol provides the source * address, this source address is filled in. The argument 'msg_namelen' is * initialized to the size of the buffer associated with msg_name, and * modified on return to indicate the actual size of the address stored * there. * * Input Parameters: * psock - A pointer to a NuttX-specific, internal socket structure * msg - Buffer to receive the message * flags - Receive flags * * Returned Value: * On success, returns the number of characters received. If no data is * available to be received and the peer has performed an orderly shutdown, * recvmsg() will return 0. Otherwise, on errors, a negated errno value is * returned (see recvmsg() for the list of appropriate error values). * ****************************************************************************/ static ssize_t inet_recvmsg(FAR struct socket *psock, FAR struct msghdr *msg, int flags) { ssize_t ret; /* If a 'from' address has been provided, verify that it is large * enough to hold this address family. */ if (msg->msg_name) { socklen_t minlen; /* Get the minimum socket length */ switch (psock->s_domain) { #ifdef CONFIG_NET_IPv4 case PF_INET: { minlen = sizeof(struct sockaddr_in); } break; #endif #ifdef CONFIG_NET_IPv6 case PF_INET6: { minlen = sizeof(struct sockaddr_in6); } break; #endif default: DEBUGPANIC(); return -EINVAL; } if (msg->msg_namelen < minlen) { return -EINVAL; } } /* Read from the network interface driver buffer. * Or perform the TCP/IP or UDP recv() operation. */ switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: { #ifdef NET_TCP_HAVE_STACK ret = psock_tcp_recvfrom(psock, msg, flags); #else ret = -ENOSYS; #endif } break; #endif /* CONFIG_NET_TCP */ #ifdef CONFIG_NET_UDP case SOCK_DGRAM: { #ifdef NET_UDP_HAVE_STACK ret = psock_udp_recvfrom(psock, msg, flags); #else ret = -ENOSYS; #endif } break; #endif /* CONFIG_NET_UDP */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) case SOCK_CTRL: { nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type); ret = -EOPNOTSUPP; } break; #endif default: { nerr("ERROR: Unsupported socket type: %d\n", psock->s_type); ret = -ENOSYS; } break; } return ret; } #endif /* NET_UDP_HAVE_STACK || NET_TCP_HAVE_STACK */ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: inet_close * * Description: * Performs the close operation on an AF_INET or AF_INET6 socket instance * * Input Parameters: * psock Socket instance * * Returned Value: * 0 on success; -1 on error with errno set appropriately. * * Assumptions: * ****************************************************************************/ int inet_close(FAR struct socket *psock) { /* Perform some pre-close operations for the AF_INET/AF_INET6 address * types. */ #ifdef CONFIG_NET_TCP if (psock->s_type == SOCK_STREAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_TCP))) { #ifdef NET_TCP_HAVE_STACK FAR struct tcp_conn_s *conn = psock->s_conn; int ret; /* Is this the last reference to the connection structure (there * could be more if the socket was dup'ed). */ if (conn->crefs <= 1) { /* Yes... Clost the socket */ ret = tcp_close(psock); if (ret < 0) { /* This would normally occur only if there is a timeout * from a lingering close. */ nerr("ERROR: tcp_close failed: %d\n", ret); return ret; } } else { /* No.. Just decrement the reference count */ conn->crefs--; } #else nwarn("WARNING: SOCK_STREAM support is not available in this " "configuration\n"); return -EAFNOSUPPORT; #endif /* NET_TCP_HAVE_STACK */ } else #endif /* CONFIG_NET_TCP */ #ifdef CONFIG_NET_UDP if (psock->s_type == SOCK_DGRAM || (psock->s_type == SOCK_CTRL && (psock->s_proto == 0 || psock->s_proto == IPPROTO_UDP))) { #ifdef NET_UDP_HAVE_STACK FAR struct udp_conn_s *conn = psock->s_conn; int ret; /* Is this the last reference to the connection structure (there * could be more if the socket was dup'ed). */ if (conn->crefs <= 1) { /* Yes... Clost the socket */ ret = udp_close(psock); if (ret < 0) { /* This would normally occur only if there is a timeout * from a lingering close. */ nerr("ERROR: udp_close failed: %d\n", ret); return ret; } } else { /* No.. Just decrement the reference count */ conn->crefs--; } #else nwarn("WARNING: SOCK_DGRAM support is not available in this " "configuration\n"); return -EAFNOSUPPORT; #endif /* NET_UDP_HAVE_STACK */ } else #endif /* CONFIG_NET_UDP */ { return -EBADF; } return OK; } /**************************************************************************** * Name: inet_sockif * * Description: * Return the socket interface associated with the inet address family. * * Input Parameters: * family - Socket address family * type - Socket type * protocol - Socket protocol * * Returned Value: * On success, a non-NULL instance of struct sock_intf_s is returned. NULL * is returned only if the address family is not supported. * ****************************************************************************/ FAR const struct sock_intf_s * inet_sockif(sa_family_t family, int type, int protocol) { DEBUGASSERT(family == PF_INET || family == PF_INET6); #if defined(HAVE_PFINET_SOCKETS) && defined(CONFIG_NET_ICMP_SOCKET) /* PF_INET, ICMP data gram sockets are a special case of raw sockets */ if (family == PF_INET && (type == SOCK_DGRAM || type == SOCK_CTRL || type == SOCK_RAW) && protocol == IPPROTO_ICMP) { return &g_icmp_sockif; } else #endif #if defined(HAVE_PFINET6_SOCKETS) && defined(CONFIG_NET_ICMPv6_SOCKET) /* PF_INET, ICMP data gram sockets are a special case of raw sockets */ if (family == PF_INET6 && (type == SOCK_DGRAM || type == SOCK_CTRL || type == SOCK_RAW) && protocol == IPPROTO_ICMPV6) { return &g_icmpv6_sockif; } else #endif #if defined(NET_UDP_HAVE_STACK) || defined(NET_TCP_HAVE_STACK) { return &g_inet_sockif; } #else { return NULL; } #endif } #endif /* HAVE_INET_SOCKETS */