Projects/Incomplete/Webserver/Lib/uip/uip-fw.h

   1 /**
   2  * \addtogroup uipfw
   3  * @{
   4  */
   5
   6 /**
   7  * \file
   8  * uIP packet forwarding header file.
   9  * \author Adam Dunkels <adam@sics.se>
  10  */
  11
  12 /*
  13  * Copyright (c) 2004, Swedish Institute of Computer Science.
  14  * All rights reserved.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the Institute nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  * This file is part of the uIP TCP/IP stack
  41  *
  42  * Author: Adam Dunkels <adam@sics.se>
  43  *
  44  * $Id: uip-fw.h,v 1.2 2006/06/12 08:00:30 adam Exp $
  45  */
  46 #ifndef __UIP_FW_H__
  47 #define __UIP_FW_H__
  48
  49 #include "uip.h"
  50
  51 /**
  52  * Representation of a uIP network interface.
  53  */
  54 struct uip_fw_netif {
  55   struct uip_fw_netif *next;  /**< Pointer to the next interface when
  56                                  linked in a list. */
  57   u16_t ipaddr[2];            /**< The IP address of this interface. */
  58   u16_t netmask[2];           /**< The netmask of the interface. */
  59   u8_t (* output)(void);
  60                               /**< A pointer to the function that
  61                                  sends a packet. */
  62 };
  63
  64 /**
  65  * Intantiating macro for a uIP network interface.
  66  *
  67  * Example:
  68  \code
  69  struct uip_fw_netif slipnetif =
  70    {UIP_FW_NETIF(192,168,76,1, 255,255,255,0, slip_output)};
  71  \endcode
  72  * \param ip1,ip2,ip3,ip4 The IP address of the network interface.
  73  *
  74  * \param nm1,nm2,nm3,nm4 The netmask of the network interface.
  75  *
  76  * \param outputfunc A pointer to the output function of the network interface.
  77  *
  78  * \hideinitializer
  79  */
  80 #define UIP_FW_NETIF(ip1,ip2,ip3,ip4, nm1,nm2,nm3,nm4, outputfunc) \
  81         NULL, \
  82         {HTONS((ip1 << 8) | ip2), HTONS((ip3 << 8) | ip4)}, \
  83         {HTONS((nm1 << 8) | nm2), HTONS((nm3 << 8) | nm4)}, \
  84         outputfunc
  85
  86 /**
  87  * Set the IP address of a network interface.
  88  *
  89  * \param netif A pointer to the uip_fw_netif structure for the network interface.
  90  *
  91  * \param addr A pointer to an IP address.
  92  *
  93  * \hideinitializer
  94  */
  95 #define uip_fw_setipaddr(netif, addr) \
  96         do { (netif)->ipaddr[0] = ((u16_t *)(addr))[0]; \
  97              (netif)->ipaddr[1] = ((u16_t *)(addr))[1]; } while(0)
  98 /**
  99  * Set the netmask of a network interface.
 100  *
 101  * \param netif A pointer to the uip_fw_netif structure for the network interface.
 102  *
 103  * \param addr A pointer to an IP address representing the netmask.
 104  *
 105  * \hideinitializer
 106  */
 107 #define uip_fw_setnetmask(netif, addr) \
 108         do { (netif)->netmask[0] = ((u16_t *)(addr))[0]; \
 109              (netif)->netmask[1] = ((u16_t *)(addr))[1]; } while(0)
 110
 111 void uip_fw_init(void);
 112 u8_t uip_fw_forward(void);
 113 u8_t uip_fw_output(void);
 114 void uip_fw_register(struct uip_fw_netif *netif);
 115 void uip_fw_default(struct uip_fw_netif *netif);
 116 void uip_fw_periodic(void);
 117
 118
 119 /**
 120  * A non-error message that indicates that a packet should be
 121  * processed locally.
 122  *
 123  * \hideinitializer
 124  */
 125 #define UIP_FW_LOCAL     0
 126
 127 /**
 128  * A non-error message that indicates that something went OK.
 129  *
 130  * \hideinitializer
 131  */
 132 #define UIP_FW_OK        0
 133
 134 /**
 135  * A non-error message that indicates that a packet was forwarded.
 136  *
 137  * \hideinitializer
 138  */
 139 #define UIP_FW_FORWARDED 1
 140
 141 /**
 142  * A non-error message that indicates that a zero-length packet
 143  * transmission was attempted, and that no packet was sent.
 144  *
 145  * \hideinitializer
 146  */
 147 #define UIP_FW_ZEROLEN   2
 148
 149 /**
 150  * An error message that indicates that a packet that was too large
 151  * for the outbound network interface was detected.
 152  *
 153  * \hideinitializer
 154  */
 155 #define UIP_FW_TOOLARGE  3
 156
 157 /**
 158  * An error message that indicates that no suitable interface could be
 159  * found for an outbound packet.
 160  *
 161  * \hideinitializer
 162  */
 163 #define UIP_FW_NOROUTE   4
 164
 165 /**
 166  * An error message that indicates that a packet that should be
 167  * forwarded or output was dropped.
 168  *
 169  * \hideinitializer
 170  */
 171 #define UIP_FW_DROPPED   5
 172
 173
 174 #endif /* __UIP_FW_H__ */
 175
 176 /** @} */