Diff: include/polarssl/net.h

Revision:

0:137634ff4186

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/polarssl/net.h	Thu Jun 11 03:27:03 2015 +0000
@@ -0,0 +1,158 @@
+/**
+ * \file net.h
+ *
+ * \brief Network communication functions
+ *
+ *  Copyright (C) 2006-2011, ARM Limited, All Rights Reserved
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_NET_H
+#define POLARSSL_NET_H
+
+#include <stddef.h>
+
+#define POLARSSL_ERR_NET_UNKNOWN_HOST                      -0x0056  /**< Failed to get an IP address for the given hostname. */
+#define POLARSSL_ERR_NET_SOCKET_FAILED                     -0x0042  /**< Failed to open a socket. */
+#define POLARSSL_ERR_NET_CONNECT_FAILED                    -0x0044  /**< The connection to the given server / port failed. */
+#define POLARSSL_ERR_NET_BIND_FAILED                       -0x0046  /**< Binding of the socket failed. */
+#define POLARSSL_ERR_NET_LISTEN_FAILED                     -0x0048  /**< Could not listen on the socket. */
+#define POLARSSL_ERR_NET_ACCEPT_FAILED                     -0x004A  /**< Could not accept the incoming connection. */
+#define POLARSSL_ERR_NET_RECV_FAILED                       -0x004C  /**< Reading information from the socket failed. */
+#define POLARSSL_ERR_NET_SEND_FAILED                       -0x004E  /**< Sending information through the socket failed. */
+#define POLARSSL_ERR_NET_CONN_RESET                        -0x0050  /**< Connection was reset by peer. */
+#define POLARSSL_ERR_NET_WANT_READ                         -0x0052  /**< Connection requires a read call. */
+#define POLARSSL_ERR_NET_WANT_WRITE                        -0x0054  /**< Connection requires a write call. */
+
+#define POLARSSL_NET_LISTEN_BACKLOG         10 /**< The backlog that listen() should use. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          Initiate a TCP connection with host:port
+ *
+ * \param fd       Socket to use
+ * \param host     Host to connect to
+ * \param port     Port to connect to
+ *
+ * \return         0 if successful, or one of:
+ *                      POLARSSL_ERR_NET_SOCKET_FAILED,
+ *                      POLARSSL_ERR_NET_UNKNOWN_HOST,
+ *                      POLARSSL_ERR_NET_CONNECT_FAILED
+ */
+int net_connect( int *fd, const char *host, int port );
+
+/**
+ * \brief          Create a listening socket on bind_ip:port.
+ *                 If bind_ip == NULL, all interfaces are binded.
+ *
+ * \param fd       Socket to use
+ * \param bind_ip  IP to bind to, can be NULL
+ * \param port     Port number to use
+ *
+ * \return         0 if successful, or one of:
+ *                      POLARSSL_ERR_NET_SOCKET_FAILED,
+ *                      POLARSSL_ERR_NET_BIND_FAILED,
+ *                      POLARSSL_ERR_NET_LISTEN_FAILED
+ */
+int net_bind( int *fd, const char *bind_ip, int port );
+
+/**
+ * \brief           Accept a connection from a remote client
+ *
+ * \param bind_fd   Relevant socket
+ * \param client_fd Will contain the connected client socket
+ * \param client_ip Will contain the client IP address
+ *                  Must be at least 4 bytes, or 16 if IPv6 is supported
+ *
+ * \return          0 if successful, POLARSSL_ERR_NET_ACCEPT_FAILED, or
+ *                  POLARSSL_ERR_NET_WANT_READ is bind_fd was set to
+ *                  non-blocking and accept() is blocking.
+ */
+int net_accept( int bind_fd, int *client_fd, void *client_ip );
+
+/**
+ * \brief          Set the socket blocking
+ *
+ * \param fd       Socket to set
+ *
+ * \return         0 if successful, or a non-zero error code
+ */
+int net_set_block( int fd );
+
+/**
+ * \brief          Set the socket non-blocking
+ *
+ * \param fd       Socket to set
+ *
+ * \return         0 if successful, or a non-zero error code
+ */
+int net_set_nonblock( int fd );
+
+/**
+ * \brief          Portable usleep helper
+ *
+ * \param usec     Amount of microseconds to sleep
+ *
+ * \note           Real amount of time slept will not be less than
+ *                 select()'s timeout granularity (typically, 10ms).
+ */
+void net_usleep( unsigned long usec );
+
+/**
+ * \brief          Read at most 'len' characters. If no error occurs,
+ *                 the actual amount read is returned.
+ *
+ * \param ctx      Socket
+ * \param buf      The buffer to write to
+ * \param len      Maximum length of the buffer
+ *
+ * \return         This function returns the number of bytes received,
+ *                 or a non-zero error code; POLARSSL_ERR_NET_WANT_READ
+ *                 indicates read() is blocking.
+ */
+int net_recv( void *ctx, unsigned char *buf, size_t len );
+
+/**
+ * \brief          Write at most 'len' characters. If no error occurs,
+ *                 the actual amount read is returned.
+ *
+ * \param ctx      Socket
+ * \param buf      The buffer to read from
+ * \param len      The length of the buffer
+ *
+ * \return         This function returns the number of bytes sent,
+ *                 or a non-zero error code; POLARSSL_ERR_NET_WANT_WRITE
+ *                 indicates write() is blocking.
+ */
+int net_send( void *ctx, const unsigned char *buf, size_t len );
+
+/**
+ * \brief          Gracefully shutdown the connection
+ *
+ * \param fd       The socket to close
+ */
+void net_close( int fd );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* net.h */
+