/**************************************************************************** * net/inet/inet_sockif.c * * Copyright (C) 2017-2018 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 #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 Function Prototypes ****************************************************************************/ #if defined(NET_UDP_HAVE_STACK) || defined(NET_TCP_HAVE_STACK) static int inet_setup(FAR struct socket *psock, int protocol); 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); #ifndef CONFIG_DISABLE_POLL static int inet_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup); #endif 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); #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 */ #ifndef CONFIG_DISABLE_POLL inet_poll, /* si_poll */ #endif inet_send, /* si_send */ inet_sendto, /* si_sendto */ #ifdef CONFIG_NET_SENDFILE inet_sendfile, /* si_sendfile */ #endif inet_recvfrom, /* si_recvfrom */ inet_close /* si_close */ }; /**************************************************************************** * 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; /* 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, int protocol) { /* 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 (protocol != 0 && protocol != IPPROTO_TCP) { nerr("ERROR: Unsupported stream protocol: %d\n", protocol); 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 (protocol != 0 && protocol != IPPROTO_UDP) { nerr("ERROR: Unsupported datagram protocol: %d\n", protocol); 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 */ 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: /* REVISIT: Non-blocking recv() depends on CONFIG_NET_TCP_READAHEAD, * but non-blocking send() depends on CONFIG_NET_TCP_WRITE_BUFFERS. */ #ifdef CONFIG_NET_TCP_READAHEAD return SOCKCAP_NONBLOCKING; #else return 0; #endif #endif #ifdef NET_UDP_HAVE_STACK case SOCK_DGRAM: /* REVISIT: Non-blocking recvfrom() depends on CONFIG_NET_UDP_READAHEAD, * but non-blocking sendto() depends on CONFIG_NET_UDP_WRITE_BUFFERS. */ #ifdef CONFIG_NET_UDP_READAHEAD return SOCKCAP_NONBLOCKING; #else return 0; #endif #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) { 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) { 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 -EBADF; } /* 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); /* Mark the socket bound */ if (ret >= 0) { psock->s_flags |= _SF_BOUND; } #else nwarn("WARNING: TCP/IP stack is not available in this configuration\n"); return -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); /* Mark the socket bound */ if (ret >= 0) { psock->s_flags |= _SF_BOUND; } #else nwarn("WARNING: UDP stack is not available in this configuration\n"); ret = -ENOSYS; #endif } break; #endif /* CONFIG_NET_UDP */ 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; } } /**************************************************************************** * 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 list() for the set of appropriate error values. * ****************************************************************************/ 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 = (FAR struct tcp_conn_s *)psock->s_conn; if (conn->lport <= 0) { return -EOPNOTSUPP; } #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 failue. 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 -EBADF; } } break; #endif #ifdef CONFIG_NET_IPv6 case AF_INET6: { if (addrlen < sizeof(struct sockaddr_in6)) { return -EBADF; } } break; #endif 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: { /* Verify that the socket is not already connected */ if (_SS_ISCONNECTED(psock->s_flags)) { return -EISCONN; } /* 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 = (FAR struct udp_conn_s *)psock->s_conn; ret = udp_connect(conn, addr); if (ret < 0 || addr == NULL) { /* Failed to connect or explicitly disconnected */ psock->s_flags &= ~_SF_CONNECTED; conn->flags &= ~_UDP_FLAG_CONNECTMODE; } else { /* Successfully connected */ psock->s_flags |= _SF_CONNECTED; conn->flags |= _UDP_FLAG_CONNECTMODE; } return ret; } #endif /* CONFIG_NET_UDP */ 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 desrciption of the approriate 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) { #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 -EBADF; } } break; #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 case PF_INET6: { if (*addrlen < sizeof(struct sockaddr_in6)) { return -EBADF; } } 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; } return OK; #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(HAVE_TCP_POLL) || defined(HAVE_UDP_POLL) static inline int inet_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds) { #ifdef HAVE_TCP_POLL if (psock->s_type == SOCK_STREAM) { return tcp_pollsetup(psock, fds); } else #endif /* HAVE_TCP_POLL */ #ifdef HAVE_UDP_POLL if (psock->s_type != SOCK_STREAM) { return udp_pollsetup(psock, fds); } else #endif /* HAVE_UDP_POLL */ { return -ENOSYS; } } #endif /* HAVE_TCP_POLL || HAVE_UDP_POLL */ /**************************************************************************** * 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(HAVE_TCP_POLL) || defined(HAVE_UDP_POLL) static inline int inet_pollteardown(FAR struct socket *psock, FAR struct pollfd *fds) { #ifdef HAVE_TCP_POLL if (psock->s_type == SOCK_STREAM) { return tcp_pollteardown(psock, fds); } else #endif /* HAVE_TCP_POLL */ #ifdef HAVE_UDP_POLL if (psock->s_type == SOCK_DGRAM) { return udp_pollteardown(psock, fds); } else #endif /* HAVE_UDP_POLL */ { return -ENOSYS; } } #endif /* HAVE_TCP_POLL || HAVE_UDP_POLL */ /**************************************************************************** * 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 * ****************************************************************************/ #ifndef CONFIG_DISABLE_POLL static int inet_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup) { #if defined(HAVE_TCP_POLL) || defined(HAVE_UDP_POLL) /* 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 /* HAVE_TCP_POLL || !HAVE_UDP_POLL */ } #endif /* !CONFIG_DISABLE_POLL */ /**************************************************************************** * 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) { 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); } #endif /* NET_TCP_HAVE_STACK */ #elif defined(NET_TCP_HAVE_STACK) ret = psock_tcp_send(psock, buf, len); #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 = psock_udp_send(psock, buf, len); } #endif /* NET_UDP_HAVE_STACK */ #elif defined(NET_UDP_HAVE_STACK) /* Only UDP/IP packet send */ ret = psock_udp_send(psock, buf, len); #else ret = -ENOSYS; #endif /* CONFIG_NET_6LOWPAN */ } break; #endif /* CONFIG_NET_UDP */ 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 this is a connected socket, then return EISCONN */ if (psock->s_type != SOCK_DGRAM) { nerr("ERROR: Connected socket\n"); 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_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) { #if defined(CONFIG_NET_TCP) && !defined(CONFIG_NET_TCP_NO_STACK) return tcp_sendfile(psock, infile, offset, size_t count); #else return -ENOSYS; #endif } #endif #endif /* NET_UDP_HAVE_STACK || NET_TCP_HAVE_STACK */ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * 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 && 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 && protocol == IPPROTO_ICMP6) { return &g_icmpv6_sockif; } else #endif #ifdef NET_UDP_HAVE_STACK if (type == SOCK_DGRAM && (protocol == 0 || protocol == IPPROTO_UDP)) { return &g_inet_sockif; } else #endif #ifdef NET_TCP_HAVE_STACK if (type == SOCK_STREAM && (protocol == 0 || protocol == IPPROTO_TCP)) { return &g_inet_sockif; } else #endif { return NULL; } } #endif /* HAVE_INET_SOCKETS */