9 * Header file for the uIP TCP/IP stack.
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10 * \author Adam Dunkels <adam@dunkels.com>
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12 * The uIP TCP/IP stack header file contains definitions for a number
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13 * of C macros that are used by uIP programs as well as internal uIP
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14 * structures, TCP/IP header structures and function declarations.
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20 * Copyright (c) 2001-2003, Adam Dunkels.
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21 * All rights reserved.
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23 * Redistribution and use in source and binary forms, with or without
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24 * modification, are permitted provided that the following conditions
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26 * 1. Redistributions of source code must retain the above copyright
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27 * notice, this list of conditions and the following disclaimer.
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28 * 2. Redistributions in binary form must reproduce the above copyright
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29 * notice, this list of conditions and the following disclaimer in the
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30 * documentation and/or other materials provided with the distribution.
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31 * 3. The name of the author may not be used to endorse or promote
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32 * products derived from this software without specific prior
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33 * written permission.
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35 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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36 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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37 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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38 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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39 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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40 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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41 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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42 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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43 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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44 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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45 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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47 * This file is part of the uIP TCP/IP stack.
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49 * $Id: uip.h,v 1.40 2006/06/08 07:12:07 adam Exp $
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59 * Repressentation of an IP address.
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62 typedef u16_t uip_ip4addr_t[2];
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63 typedef u16_t uip_ip6addr_t[8];
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65 typedef uip_ip6addr_t uip_ipaddr_t;
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66 #else /* UIP_CONF_IPV6 */
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67 typedef uip_ip4addr_t uip_ipaddr_t;
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68 #endif /* UIP_CONF_IPV6 */
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70 /*---------------------------------------------------------------------------*/
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71 /* First, the functions that should be called from the
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72 * system. Initialization, the periodic timer and incoming packets are
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73 * handled by the following three functions.
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77 * \defgroup uipconffunc uIP configuration functions
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80 * The uIP configuration functions are used for setting run-time
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81 * parameters in uIP such as IP addresses.
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85 * Set the IP address of this host.
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87 * The IP address is represented as a 4-byte array where the first
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88 * octet of the IP address is put in the first member of the 4-byte
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96 uip_ipaddr(&addr, 192,168,1,2);
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97 uip_sethostaddr(&addr);
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100 * \param addr A pointer to an IP address of type uip_ipaddr_t;
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106 #define uip_sethostaddr(addr) uip_ipaddr_copy(uip_hostaddr, (addr))
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109 * Get the IP address of this host.
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111 * The IP address is represented as a 4-byte array where the first
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112 * octet of the IP address is put in the first member of the 4-byte
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117 uip_ipaddr_t hostaddr;
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119 uip_gethostaddr(&hostaddr);
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121 * \param addr A pointer to a uip_ipaddr_t variable that will be
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122 * filled in with the currently configured IP address.
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126 #define uip_gethostaddr(addr) uip_ipaddr_copy((addr), uip_hostaddr)
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129 * Set the default router's IP address.
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131 * \param addr A pointer to a uip_ipaddr_t variable containing the IP
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132 * address of the default router.
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138 #define uip_setdraddr(addr) uip_ipaddr_copy(uip_draddr, (addr))
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143 * \param addr A pointer to a uip_ipaddr_t variable containing the IP
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144 * address of the netmask.
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150 #define uip_setnetmask(addr) uip_ipaddr_copy(uip_netmask, (addr))
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154 * Get the default router's IP address.
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156 * \param addr A pointer to a uip_ipaddr_t variable that will be
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157 * filled in with the IP address of the default router.
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161 #define uip_getdraddr(addr) uip_ipaddr_copy((addr), uip_draddr)
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166 * \param addr A pointer to a uip_ipaddr_t variable that will be
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167 * filled in with the value of the netmask.
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171 #define uip_getnetmask(addr) uip_ipaddr_copy((addr), uip_netmask)
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176 * \defgroup uipinit uIP initialization functions
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179 * The uIP initialization functions are used for booting uIP.
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183 * uIP initialization function.
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185 * This function should be called at boot up to initilize the uIP
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188 void uip_init(void);
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191 * uIP initialization function.
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193 * This function may be used at boot time to set the initial ip_id.
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195 void uip_setipid(u16_t id);
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200 * \defgroup uipdevfunc uIP device driver functions
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203 * These functions are used by a network device driver for interacting
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208 * Process an incoming packet.
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210 * This function should be called when the device driver has received
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211 * a packet from the network. The packet from the device driver must
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212 * be present in the uip_buf buffer, and the length of the packet
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213 * should be placed in the uip_len variable.
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215 * When the function returns, there may be an outbound packet placed
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216 * in the uip_buf packet buffer. If so, the uip_len variable is set to
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217 * the length of the packet. If no packet is to be sent out, the
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218 * uip_len variable is set to 0.
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220 * The usual way of calling the function is presented by the source
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223 uip_len = devicedriver_poll();
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227 devicedriver_send();
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232 * \note If you are writing a uIP device driver that needs ARP
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233 * (Address Resolution Protocol), e.g., when running uIP over
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234 * Ethernet, you will need to call the uIP ARP code before calling
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237 #define BUF ((struct uip_eth_hdr *)&uip_buf[0])
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238 uip_len = ethernet_devicedrver_poll();
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240 if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
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245 ethernet_devicedriver_send();
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247 } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
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250 ethernet_devicedriver_send();
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257 #define uip_input() uip_process(UIP_DATA)
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260 * Periodic processing for a connection identified by its number.
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262 * This function does the necessary periodic processing (timers,
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263 * polling) for a uIP TCP conneciton, and should be called when the
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264 * periodic uIP timer goes off. It should be called for every
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265 * connection, regardless of whether they are open of closed.
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267 * When the function returns, it may have an outbound packet waiting
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268 * for service in the uIP packet buffer, and if so the uip_len
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269 * variable is set to a value larger than zero. The device driver
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270 * should be called to send out the packet.
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272 * The ususal way of calling the function is through a for() loop like
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275 for(i = 0; i < UIP_CONNS; ++i) {
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278 devicedriver_send();
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283 * \note If you are writing a uIP device driver that needs ARP
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284 * (Address Resolution Protocol), e.g., when running uIP over
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285 * Ethernet, you will need to call the uip_arp_out() function before
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286 * calling the device driver:
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288 for(i = 0; i < UIP_CONNS; ++i) {
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292 ethernet_devicedriver_send();
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297 * \param conn The number of the connection which is to be periodically polled.
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301 #define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
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302 uip_process(UIP_TIMER); } while (0)
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308 #define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED)
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311 * Perform periodic processing for a connection identified by a pointer
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312 * to its structure.
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314 * Same as uip_periodic() but takes a pointer to the actual uip_conn
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315 * struct instead of an integer as its argument. This function can be
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316 * used to force periodic processing of a specific connection.
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318 * \param conn A pointer to the uip_conn struct for the connection to
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323 #define uip_periodic_conn(conn) do { uip_conn = conn; \
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324 uip_process(UIP_TIMER); } while (0)
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327 * Reuqest that a particular connection should be polled.
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329 * Similar to uip_periodic_conn() but does not perform any timer
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330 * processing. The application is polled for new data.
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332 * \param conn A pointer to the uip_conn struct for the connection to
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337 #define uip_poll_conn(conn) do { uip_conn = conn; \
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338 uip_process(UIP_POLL_REQUEST); } while (0)
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343 * Periodic processing for a UDP connection identified by its number.
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345 * This function is essentially the same as uip_periodic(), but for
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346 * UDP connections. It is called in a similar fashion as the
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347 * uip_periodic() function:
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349 for(i = 0; i < UIP_UDP_CONNS; i++) {
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350 uip_udp_periodic(i);
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352 devicedriver_send();
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357 * \note As for the uip_periodic() function, special care has to be
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358 * taken when using uIP together with ARP and Ethernet:
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360 for(i = 0; i < UIP_UDP_CONNS; i++) {
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361 uip_udp_periodic(i);
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364 ethernet_devicedriver_send();
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369 * \param conn The number of the UDP connection to be processed.
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373 #define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
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374 uip_process(UIP_UDP_TIMER); } while (0)
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377 * Periodic processing for a UDP connection identified by a pointer to
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380 * Same as uip_udp_periodic() but takes a pointer to the actual
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381 * uip_conn struct instead of an integer as its argument. This
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382 * function can be used to force periodic processing of a specific
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385 * \param conn A pointer to the uip_udp_conn struct for the connection
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390 #define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
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391 uip_process(UIP_UDP_TIMER); } while (0)
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394 #endif /* UIP_UDP */
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397 * The uIP packet buffer.
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399 * The uip_buf array is used to hold incoming and outgoing
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400 * packets. The device driver should place incoming data into this
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401 * buffer. When sending data, the device driver should read the link
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402 * level headers and the TCP/IP headers from this buffer. The size of
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403 * the link level headers is configured by the UIP_LLH_LEN define.
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405 * \note The application data need not be placed in this buffer, so
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406 * the device driver must read it from the place pointed to by the
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407 * uip_appdata pointer as illustrated by the following example:
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410 devicedriver_send(void)
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412 hwsend(&uip_buf[0], UIP_LLH_LEN);
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413 if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) {
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414 hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN);
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416 hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN);
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417 hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN);
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422 #ifndef UIP_CONF_EXTERNAL_BUFFER
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423 extern u8_t uip_buf[UIP_BUFSIZE+2];
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425 extern unsigned char *uip_buf;
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430 /*---------------------------------------------------------------------------*/
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431 /* Functions that are used by the uIP application program. Opening and
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432 * closing connections, sending and receiving data, etc. is all
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433 * handled by the functions below.
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436 * \defgroup uipappfunc uIP application functions
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439 * Functions used by an application running of top of uIP.
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443 * Start listening to the specified port.
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445 * \note Since this function expects the port number in network byte
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446 * order, a conversion using HTONS() or htons() is necessary.
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449 uip_listen(HTONS(80));
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452 * \param port A 16-bit port number in network byte order.
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454 void uip_listen(u16_t port);
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457 * Stop listening to the specified port.
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459 * \note Since this function expects the port number in network byte
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460 * order, a conversion using HTONS() or htons() is necessary.
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463 uip_unlisten(HTONS(80));
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466 * \param port A 16-bit port number in network byte order.
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468 void uip_unlisten(u16_t port);
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471 * Connect to a remote host using TCP.
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473 * This function is used to start a new connection to the specified
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474 * port on the specied host. It allocates a new connection identifier,
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475 * sets the connection to the SYN_SENT state and sets the
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476 * retransmission timer to 0. This will cause a TCP SYN segment to be
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477 * sent out the next time this connection is periodically processed,
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478 * which usually is done within 0.5 seconds after the call to
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481 * \note This function is avaliable only if support for active open
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482 * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
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484 * \note Since this function requires the port number to be in network
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485 * byte order, a conversion using HTONS() or htons() is necessary.
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488 uip_ipaddr_t ipaddr;
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490 uip_ipaddr(&ipaddr, 192,168,1,2);
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491 uip_connect(&ipaddr, HTONS(80));
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494 * \param ripaddr The IP address of the remote hot.
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496 * \param port A 16-bit port number in network byte order.
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498 * \return A pointer to the uIP connection identifier for the new connection,
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499 * or NULL if no connection could be allocated.
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502 struct uip_conn *uip_connect(uip_ipaddr_t *ripaddr, u16_t port);
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509 * Check if a connection has outstanding (i.e., unacknowledged) data.
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511 * \param conn A pointer to the uip_conn structure for the connection.
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515 #define uip_outstanding(conn) ((conn)->len)
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518 * Send data on the current connection.
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520 * This function is used to send out a single segment of TCP
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521 * data. Only applications that have been invoked by uIP for event
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522 * processing can send data.
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524 * The amount of data that actually is sent out after a call to this
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525 * funcion is determined by the maximum amount of data TCP allows. uIP
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526 * will automatically crop the data so that only the appropriate
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527 * amount of data is sent. The function uip_mss() can be used to query
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528 * uIP for the amount of data that actually will be sent.
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530 * \note This function does not guarantee that the sent data will
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531 * arrive at the destination. If the data is lost in the network, the
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532 * application will be invoked with the uip_rexmit() event being
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533 * set. The application will then have to resend the data using this
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536 * \param data A pointer to the data which is to be sent.
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538 * \param len The maximum amount of data bytes to be sent.
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542 void uip_send(const void *data, int len);
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545 * The length of any incoming data that is currently avaliable (if avaliable)
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546 * in the uip_appdata buffer.
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548 * The test function uip_data() must first be used to check if there
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549 * is any data available at all.
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553 /*void uip_datalen(void);*/
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554 #define uip_datalen() uip_len
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557 * The length of any out-of-band data (urgent data) that has arrived
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558 * on the connection.
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560 * \note The configuration parameter UIP_URGDATA must be set for this
\r
561 * function to be enabled.
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565 #define uip_urgdatalen() uip_urglen
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568 * Close the current connection.
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570 * This function will close the current connection in a nice way.
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574 #define uip_close() (uip_flags = UIP_CLOSE)
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577 * Abort the current connection.
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579 * This function will abort (reset) the current connection, and is
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580 * usually used when an error has occured that prevents using the
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581 * uip_close() function.
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585 #define uip_abort() (uip_flags = UIP_ABORT)
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588 * Tell the sending host to stop sending data.
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590 * This function will close our receiver's window so that we stop
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591 * receiving data for the current connection.
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595 #define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
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598 * Find out if the current connection has been previously stopped with
\r
603 #define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
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606 * Restart the current connection, if is has previously been stopped
\r
609 * This function will open the receiver's window again so that we
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610 * start receiving data for the current connection.
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614 #define uip_restart() do { uip_flags |= UIP_NEWDATA; \
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615 uip_conn->tcpstateflags &= ~UIP_STOPPED; \
\r
619 /* uIP tests that can be made to determine in what state the current
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620 connection is, and what the application function should do. */
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623 * Is the current connection a UDP connection?
\r
625 * This function checks whether the current connection is a UDP connection.
\r
630 #define uip_udpconnection() (uip_conn == NULL)
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633 * Is new incoming data available?
\r
635 * Will reduce to non-zero if there is new data for the application
\r
636 * present at the uip_appdata pointer. The size of the data is
\r
637 * avaliable through the uip_len variable.
\r
641 #define uip_newdata() (uip_flags & UIP_NEWDATA)
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644 * Has previously sent data been acknowledged?
\r
646 * Will reduce to non-zero if the previously sent data has been
\r
647 * acknowledged by the remote host. This means that the application
\r
648 * can send new data.
\r
652 #define uip_acked() (uip_flags & UIP_ACKDATA)
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655 * Has the connection just been connected?
\r
657 * Reduces to non-zero if the current connection has been connected to
\r
658 * a remote host. This will happen both if the connection has been
\r
659 * actively opened (with uip_connect()) or passively opened (with
\r
664 #define uip_connected() (uip_flags & UIP_CONNECTED)
\r
667 * Has the connection been closed by the other end?
\r
669 * Is non-zero if the connection has been closed by the remote
\r
670 * host. The application may then do the necessary clean-ups.
\r
674 #define uip_closed() (uip_flags & UIP_CLOSE)
\r
677 * Has the connection been aborted by the other end?
\r
679 * Non-zero if the current connection has been aborted (reset) by the
\r
684 #define uip_aborted() (uip_flags & UIP_ABORT)
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687 * Has the connection timed out?
\r
689 * Non-zero if the current connection has been aborted due to too many
\r
694 #define uip_timedout() (uip_flags & UIP_TIMEDOUT)
\r
697 * Do we need to retransmit previously data?
\r
699 * Reduces to non-zero if the previously sent data has been lost in
\r
700 * the network, and the application should retransmit it. The
\r
701 * application should send the exact same data as it did the last
\r
702 * time, using the uip_send() function.
\r
706 #define uip_rexmit() (uip_flags & UIP_REXMIT)
\r
709 * Is the connection being polled by uIP?
\r
711 * Is non-zero if the reason the application is invoked is that the
\r
712 * current connection has been idle for a while and should be
\r
715 * The polling event can be used for sending data without having to
\r
716 * wait for the remote host to send data.
\r
720 #define uip_poll() (uip_flags & UIP_POLL)
\r
723 * Get the initial maxium segment size (MSS) of the current
\r
728 #define uip_initialmss() (uip_conn->initialmss)
\r
731 * Get the current maxium segment size that can be sent on the current
\r
734 * The current maxiumum segment size that can be sent on the
\r
735 * connection is computed from the receiver's window and the MSS of
\r
736 * the connection (which also is available by calling
\r
737 * uip_initialmss()).
\r
741 #define uip_mss() (uip_conn->mss)
\r
744 * Set up a new UDP connection.
\r
746 * This function sets up a new UDP connection. The function will
\r
747 * automatically allocate an unused local port for the new
\r
748 * connection. However, another port can be chosen by using the
\r
749 * uip_udp_bind() call, after the uip_udp_new() function has been
\r
755 struct uip_udp_conn *c;
\r
757 uip_ipaddr(&addr, 192,168,2,1);
\r
758 c = uip_udp_new(&addr, HTONS(12345));
\r
760 uip_udp_bind(c, HTONS(12344));
\r
763 * \param ripaddr The IP address of the remote host.
\r
765 * \param rport The remote port number in network byte order.
\r
767 * \return The uip_udp_conn structure for the new connection or NULL
\r
768 * if no connection could be allocated.
\r
770 struct uip_udp_conn *uip_udp_new(uip_ipaddr_t *ripaddr, u16_t rport);
\r
773 * Removed a UDP connection.
\r
775 * \param conn A pointer to the uip_udp_conn structure for the connection.
\r
779 #define uip_udp_remove(conn) (conn)->lport = 0
\r
782 * Bind a UDP connection to a local port.
\r
784 * \param conn A pointer to the uip_udp_conn structure for the
\r
787 * \param port The local port number, in network byte order.
\r
791 #define uip_udp_bind(conn, port) (conn)->lport = port
\r
794 * Send a UDP datagram of length len on the current connection.
\r
796 * This function can only be called in response to a UDP event (poll
\r
797 * or newdata). The data must be present in the uip_buf buffer, at the
\r
798 * place pointed to by the uip_appdata pointer.
\r
800 * \param len The length of the data in the uip_buf buffer.
\r
804 #define uip_udp_send(len) uip_send((char *)uip_appdata, len)
\r
808 /* uIP convenience and converting functions. */
\r
811 * \defgroup uipconvfunc uIP conversion functions
\r
814 * These functions can be used for converting between different data
\r
815 * formats used by uIP.
\r
819 * Construct an IP address from four bytes.
\r
821 * This function constructs an IP address of the type that uIP handles
\r
822 * internally from four bytes. The function is handy for specifying IP
\r
823 * addresses to use with e.g. the uip_connect() function.
\r
827 uip_ipaddr_t ipaddr;
\r
828 struct uip_conn *c;
\r
830 uip_ipaddr(&ipaddr, 192,168,1,2);
\r
831 c = uip_connect(&ipaddr, HTONS(80));
\r
834 * \param addr A pointer to a uip_ipaddr_t variable that will be
\r
835 * filled in with the IP address.
\r
837 * \param addr0 The first octet of the IP address.
\r
838 * \param addr1 The second octet of the IP address.
\r
839 * \param addr2 The third octet of the IP address.
\r
840 * \param addr3 The forth octet of the IP address.
\r
844 #define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
\r
845 ((u16_t *)(addr))[0] = HTONS(((addr0) << 8) | (addr1)); \
\r
846 ((u16_t *)(addr))[1] = HTONS(((addr2) << 8) | (addr3)); \
\r
850 * Construct an IPv6 address from eight 16-bit words.
\r
852 * This function constructs an IPv6 address.
\r
856 #define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \
\r
857 ((u16_t *)(addr))[0] = HTONS((addr0)); \
\r
858 ((u16_t *)(addr))[1] = HTONS((addr1)); \
\r
859 ((u16_t *)(addr))[2] = HTONS((addr2)); \
\r
860 ((u16_t *)(addr))[3] = HTONS((addr3)); \
\r
861 ((u16_t *)(addr))[4] = HTONS((addr4)); \
\r
862 ((u16_t *)(addr))[5] = HTONS((addr5)); \
\r
863 ((u16_t *)(addr))[6] = HTONS((addr6)); \
\r
864 ((u16_t *)(addr))[7] = HTONS((addr7)); \
\r
868 * Copy an IP address to another IP address.
\r
870 * Copies an IP address from one place to another.
\r
874 uip_ipaddr_t ipaddr1, ipaddr2;
\r
876 uip_ipaddr(&ipaddr1, 192,16,1,2);
\r
877 uip_ipaddr_copy(&ipaddr2, &ipaddr1);
\r
880 * \param dest The destination for the copy.
\r
881 * \param src The source from where to copy.
\r
886 #define uip_ipaddr_copy(dest, src) do { \
\r
887 ((u16_t *)dest)[0] = ((u16_t *)src)[0]; \
\r
888 ((u16_t *)dest)[1] = ((u16_t *)src)[1]; \
\r
890 #else /* !UIP_CONF_IPV6 */
\r
891 #define uip_ipaddr_copy(dest, src) memcpy(dest, src, sizeof(uip_ip6addr_t))
\r
892 #endif /* !UIP_CONF_IPV6 */
\r
895 * Compare two IP addresses
\r
897 * Compares two IP addresses.
\r
901 uip_ipaddr_t ipaddr1, ipaddr2;
\r
903 uip_ipaddr(&ipaddr1, 192,16,1,2);
\r
904 if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) {
\r
905 printf("They are the same");
\r
909 * \param addr1 The first IP address.
\r
910 * \param addr2 The second IP address.
\r
915 #define uip_ipaddr_cmp(addr1, addr2) (((u16_t *)addr1)[0] == ((u16_t *)addr2)[0] && \
\r
916 ((u16_t *)addr1)[1] == ((u16_t *)addr2)[1])
\r
917 #else /* !UIP_CONF_IPV6 */
\r
918 #define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0)
\r
919 #endif /* !UIP_CONF_IPV6 */
\r
922 * Compare two IP addresses with netmasks
\r
924 * Compares two IP addresses with netmasks. The masks are used to mask
\r
925 * out the bits that are to be compared.
\r
929 uip_ipaddr_t ipaddr1, ipaddr2, mask;
\r
931 uip_ipaddr(&mask, 255,255,255,0);
\r
932 uip_ipaddr(&ipaddr1, 192,16,1,2);
\r
933 uip_ipaddr(&ipaddr2, 192,16,1,3);
\r
934 if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) {
\r
935 printf("They are the same");
\r
939 * \param addr1 The first IP address.
\r
940 * \param addr2 The second IP address.
\r
941 * \param mask The netmask.
\r
945 #define uip_ipaddr_maskcmp(addr1, addr2, mask) \
\r
946 (((((u16_t *)addr1)[0] & ((u16_t *)mask)[0]) == \
\r
947 (((u16_t *)addr2)[0] & ((u16_t *)mask)[0])) && \
\r
948 ((((u16_t *)addr1)[1] & ((u16_t *)mask)[1]) == \
\r
949 (((u16_t *)addr2)[1] & ((u16_t *)mask)[1])))
\r
953 * Mask out the network part of an IP address.
\r
955 * Masks out the network part of an IP address, given the address and
\r
960 uip_ipaddr_t ipaddr1, ipaddr2, netmask;
\r
962 uip_ipaddr(&ipaddr1, 192,16,1,2);
\r
963 uip_ipaddr(&netmask, 255,255,255,0);
\r
964 uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask);
\r
967 * In the example above, the variable "ipaddr2" will contain the IP
\r
968 * address 192.168.1.0.
\r
970 * \param dest Where the result is to be placed.
\r
971 * \param src The IP address.
\r
972 * \param mask The netmask.
\r
976 #define uip_ipaddr_mask(dest, src, mask) do { \
\r
977 ((u16_t *)dest)[0] = ((u16_t *)src)[0] & ((u16_t *)mask)[0]; \
\r
978 ((u16_t *)dest)[1] = ((u16_t *)src)[1] & ((u16_t *)mask)[1]; \
\r
982 * Pick the first octet of an IP address.
\r
984 * Picks out the first octet of an IP address.
\r
988 uip_ipaddr_t ipaddr;
\r
991 uip_ipaddr(&ipaddr, 1,2,3,4);
\r
992 octet = uip_ipaddr1(&ipaddr);
\r
995 * In the example above, the variable "octet" will contain the value 1.
\r
999 #define uip_ipaddr1(addr) (htons(((u16_t *)(addr))[0]) >> 8)
\r
1002 * Pick the second octet of an IP address.
\r
1004 * Picks out the second octet of an IP address.
\r
1008 uip_ipaddr_t ipaddr;
\r
1011 uip_ipaddr(&ipaddr, 1,2,3,4);
\r
1012 octet = uip_ipaddr2(&ipaddr);
\r
1015 * In the example above, the variable "octet" will contain the value 2.
\r
1017 * \hideinitializer
\r
1019 #define uip_ipaddr2(addr) (htons(((u16_t *)(addr))[0]) & 0xff)
\r
1022 * Pick the third octet of an IP address.
\r
1024 * Picks out the third octet of an IP address.
\r
1028 uip_ipaddr_t ipaddr;
\r
1031 uip_ipaddr(&ipaddr, 1,2,3,4);
\r
1032 octet = uip_ipaddr3(&ipaddr);
\r
1035 * In the example above, the variable "octet" will contain the value 3.
\r
1037 * \hideinitializer
\r
1039 #define uip_ipaddr3(addr) (htons(((u16_t *)(addr))[1]) >> 8)
\r
1042 * Pick the fourth octet of an IP address.
\r
1044 * Picks out the fourth octet of an IP address.
\r
1048 uip_ipaddr_t ipaddr;
\r
1051 uip_ipaddr(&ipaddr, 1,2,3,4);
\r
1052 octet = uip_ipaddr4(&ipaddr);
\r
1055 * In the example above, the variable "octet" will contain the value 4.
\r
1057 * \hideinitializer
\r
1059 #define uip_ipaddr4(addr) (htons(((u16_t *)(addr))[1]) & 0xff)
\r
1062 * Convert 16-bit quantity from host byte order to network byte order.
\r
1064 * This macro is primarily used for converting constants from host
\r
1065 * byte order to network byte order. For converting variables to
\r
1066 * network byte order, use the htons() function instead.
\r
1068 * \hideinitializer
\r
1071 # if UIP_BYTE_ORDER == UIP_BIG_ENDIAN
\r
1072 # define HTONS(n) (n)
\r
1073 # else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
\r
1074 # define HTONS(n) (u16_t)((((u16_t) (n)) << 8) | (((u16_t) (n)) >> 8))
\r
1075 # endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */
\r
1077 #error "HTONS already defined!"
\r
1078 #endif /* HTONS */
\r
1081 * Convert 16-bit quantity from host byte order to network byte order.
\r
1083 * This function is primarily used for converting variables from host
\r
1084 * byte order to network byte order. For converting constants to
\r
1085 * network byte order, use the HTONS() macro instead.
\r
1088 u16_t htons(u16_t val);
\r
1089 #endif /* htons */
\r
1091 #define ntohs htons
\r
1097 * Pointer to the application data in the packet buffer.
\r
1099 * This pointer points to the application data when the application is
\r
1100 * called. If the application wishes to send data, the application may
\r
1101 * use this space to write the data into before calling uip_send().
\r
1103 extern void *uip_appdata;
\r
1105 #if UIP_URGDATA > 0
\r
1106 /* u8_t *uip_urgdata:
\r
1108 * This pointer points to any urgent data that has been received. Only
\r
1109 * present if compiled with support for urgent data (UIP_URGDATA).
\r
1111 extern void *uip_urgdata;
\r
1112 #endif /* UIP_URGDATA > 0 */
\r
1116 * \defgroup uipdrivervars Variables used in uIP device drivers
\r
1119 * uIP has a few global variables that are used in device drivers for
\r
1124 * The length of the packet in the uip_buf buffer.
\r
1126 * The global variable uip_len holds the length of the packet in the
\r
1129 * When the network device driver calls the uIP input function,
\r
1130 * uip_len should be set to the length of the packet in the uip_buf
\r
1133 * When sending packets, the device driver should use the contents of
\r
1134 * the uip_len variable to determine the length of the outgoing
\r
1138 extern u16_t uip_len;
\r
1142 #if UIP_URGDATA > 0
\r
1143 extern u16_t uip_urglen, uip_surglen;
\r
1144 #endif /* UIP_URGDATA > 0 */
\r
1148 * Representation of a uIP TCP connection.
\r
1150 * The uip_conn structure is used for identifying a connection. All
\r
1151 * but one field in the structure are to be considered read-only by an
\r
1152 * application. The only exception is the appstate field whos purpose
\r
1153 * is to let the application store application-specific state (e.g.,
\r
1154 * file pointers) for the connection. The type of this field is
\r
1155 * configured in the "uipopt.h" header file.
\r
1158 uip_ipaddr_t ripaddr; /**< The IP address of the remote host. */
\r
1160 u16_t lport; /**< The local TCP port, in network byte order. */
\r
1161 u16_t rport; /**< The local remote TCP port, in network byte
\r
1164 u8_t rcv_nxt[4]; /**< The sequence number that we expect to
\r
1166 u8_t snd_nxt[4]; /**< The sequence number that was last sent by
\r
1168 u16_t len; /**< Length of the data that was previously sent. */
\r
1169 u16_t mss; /**< Current maximum segment size for the
\r
1171 u16_t initialmss; /**< Initial maximum segment size for the
\r
1173 u8_t sa; /**< Retransmission time-out calculation state
\r
1175 u8_t sv; /**< Retransmission time-out calculation state
\r
1177 u8_t rto; /**< Retransmission time-out. */
\r
1178 u8_t tcpstateflags; /**< TCP state and flags. */
\r
1179 u8_t timer; /**< The retransmission timer. */
\r
1180 u8_t nrtx; /**< The number of retransmissions for the last
\r
1183 /** The application state. */
\r
1184 uip_tcp_appstate_t appstate;
\r
1189 * Pointer to the current TCP connection.
\r
1191 * The uip_conn pointer can be used to access the current TCP
\r
1194 extern struct uip_conn *uip_conn;
\r
1195 /* The array containing all uIP connections. */
\r
1196 extern struct uip_conn uip_conns[UIP_CONNS];
\r
1198 * \addtogroup uiparch
\r
1203 * 4-byte array used for the 32-bit sequence number calculations.
\r
1205 extern u8_t uip_acc32[4];
\r
1212 * Representation of a uIP UDP connection.
\r
1214 struct uip_udp_conn {
\r
1215 uip_ipaddr_t ripaddr; /**< The IP address of the remote peer. */
\r
1216 u16_t lport; /**< The local port number in network byte order. */
\r
1217 u16_t rport; /**< The remote port number in network byte order. */
\r
1218 u8_t ttl; /**< Default time-to-live. */
\r
1220 /** The application state. */
\r
1221 uip_udp_appstate_t appstate;
\r
1225 * The current UDP connection.
\r
1227 extern struct uip_udp_conn *uip_udp_conn;
\r
1228 extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
\r
1229 #endif /* UIP_UDP */
\r
1232 * The structure holding the TCP/IP statistics that are gathered if
\r
1233 * UIP_STATISTICS is set to 1.
\r
1236 struct uip_stats {
\r
1238 uip_stats_t drop; /**< Number of dropped packets at the IP
\r
1240 uip_stats_t recv; /**< Number of received packets at the IP
\r
1242 uip_stats_t sent; /**< Number of sent packets at the IP
\r
1244 uip_stats_t vhlerr; /**< Number of packets dropped due to wrong
\r
1245 IP version or header length. */
\r
1246 uip_stats_t hblenerr; /**< Number of packets dropped due to wrong
\r
1247 IP length, high byte. */
\r
1248 uip_stats_t lblenerr; /**< Number of packets dropped due to wrong
\r
1249 IP length, low byte. */
\r
1250 uip_stats_t fragerr; /**< Number of packets dropped since they
\r
1251 were IP fragments. */
\r
1252 uip_stats_t chkerr; /**< Number of packets dropped due to IP
\r
1253 checksum errors. */
\r
1254 uip_stats_t protoerr; /**< Number of packets dropped since they
\r
1255 were neither ICMP, UDP nor TCP. */
\r
1256 } ip; /**< IP statistics. */
\r
1258 uip_stats_t drop; /**< Number of dropped ICMP packets. */
\r
1259 uip_stats_t recv; /**< Number of received ICMP packets. */
\r
1260 uip_stats_t sent; /**< Number of sent ICMP packets. */
\r
1261 uip_stats_t typeerr; /**< Number of ICMP packets with a wrong
\r
1263 } icmp; /**< ICMP statistics. */
\r
1265 uip_stats_t drop; /**< Number of dropped TCP segments. */
\r
1266 uip_stats_t recv; /**< Number of recived TCP segments. */
\r
1267 uip_stats_t sent; /**< Number of sent TCP segments. */
\r
1268 uip_stats_t chkerr; /**< Number of TCP segments with a bad
\r
1270 uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK
\r
1272 uip_stats_t rst; /**< Number of recevied TCP RST (reset) segments. */
\r
1273 uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */
\r
1274 uip_stats_t syndrop; /**< Number of dropped SYNs due to too few
\r
1275 connections was avaliable. */
\r
1276 uip_stats_t synrst; /**< Number of SYNs for closed ports,
\r
1277 triggering a RST. */
\r
1278 } tcp; /**< TCP statistics. */
\r
1281 uip_stats_t drop; /**< Number of dropped UDP segments. */
\r
1282 uip_stats_t recv; /**< Number of recived UDP segments. */
\r
1283 uip_stats_t sent; /**< Number of sent UDP segments. */
\r
1284 uip_stats_t chkerr; /**< Number of UDP segments with a bad
\r
1286 } udp; /**< UDP statistics. */
\r
1287 #endif /* UIP_UDP */
\r
1291 * The uIP TCP/IP statistics.
\r
1293 * This is the variable in which the uIP TCP/IP statistics are gathered.
\r
1295 extern struct uip_stats uip_stat;
\r
1298 /*---------------------------------------------------------------------------*/
\r
1299 /* All the stuff below this point is internal to uIP and should not be
\r
1300 * used directly by an application or by a device driver.
\r
1302 /*---------------------------------------------------------------------------*/
\r
1303 /* u8_t uip_flags:
\r
1305 * When the application is called, uip_flags will contain the flags
\r
1306 * that are defined in this file. Please read below for more
\r
1309 extern u8_t uip_flags;
\r
1311 /* The following flags may be set in the global variable uip_flags
\r
1312 before calling the application callback. The UIP_ACKDATA,
\r
1313 UIP_NEWDATA, and UIP_CLOSE flags may both be set at the same time,
\r
1314 whereas the others are mutualy exclusive. Note that these flags
\r
1315 should *NOT* be accessed directly, but only through the uIP
\r
1316 functions/macros. */
\r
1318 #define UIP_ACKDATA 1 /* Signifies that the outstanding data was
\r
1319 acked and the application should send
\r
1320 out new data instead of retransmitting
\r
1322 #define UIP_NEWDATA 2 /* Flags the fact that the peer has sent
\r
1324 #define UIP_REXMIT 4 /* Tells the application to retransmit the
\r
1325 data that was last sent. */
\r
1326 #define UIP_POLL 8 /* Used for polling the application, to
\r
1327 check if the application has data that
\r
1328 it wants to send. */
\r
1329 #define UIP_CLOSE 16 /* The remote host has closed the
\r
1330 connection, thus the connection has
\r
1331 gone away. Or the application signals
\r
1332 that it wants to close the
\r
1334 #define UIP_ABORT 32 /* The remote host has aborted the
\r
1335 connection, thus the connection has
\r
1336 gone away. Or the application signals
\r
1337 that it wants to abort the
\r
1339 #define UIP_CONNECTED 64 /* We have got a connection from a remote
\r
1340 host and have set up a new connection
\r
1341 for it, or an active connection has
\r
1342 been successfully established. */
\r
1344 #define UIP_TIMEDOUT 128 /* The connection has been aborted due to
\r
1345 too many retransmissions. */
\r
1347 /* uip_process(flag):
\r
1349 * The actual uIP function which does all the work.
\r
1351 void uip_process(u8_t flag);
\r
1353 /* The following flags are passed as an argument to the uip_process()
\r
1354 function. They are used to distinguish between the two cases where
\r
1355 uip_process() is called. It can be called either because we have
\r
1356 incoming data that should be processed, or because the periodic
\r
1357 timer has fired. These values are never used directly, but only in
\r
1358 the macrose defined in this file. */
\r
1360 #define UIP_DATA 1 /* Tells uIP that there is incoming
\r
1361 data in the uip_buf buffer. The
\r
1362 length of the data is stored in the
\r
1363 global variable uip_len. */
\r
1364 #define UIP_TIMER 2 /* Tells uIP that the periodic timer
\r
1366 #define UIP_POLL_REQUEST 3 /* Tells uIP that a connection should
\r
1368 #define UIP_UDP_SEND_CONN 4 /* Tells uIP that a UDP datagram
\r
1369 should be constructed in the
\r
1370 uip_buf buffer. */
\r
1372 #define UIP_UDP_TIMER 5
\r
1373 #endif /* UIP_UDP */
\r
1375 /* The TCP states used in the uip_conn->tcpstateflags. */
\r
1376 #define UIP_CLOSED 0
\r
1377 #define UIP_SYN_RCVD 1
\r
1378 #define UIP_SYN_SENT 2
\r
1379 #define UIP_ESTABLISHED 3
\r
1380 #define UIP_FIN_WAIT_1 4
\r
1381 #define UIP_FIN_WAIT_2 5
\r
1382 #define UIP_CLOSING 6
\r
1383 #define UIP_TIME_WAIT 7
\r
1384 #define UIP_LAST_ACK 8
\r
1385 #define UIP_TS_MASK 15
\r
1387 #define UIP_STOPPED 16
\r
1389 /* The TCP and IP headers. */
\r
1395 struct uip_tcpip_hdr {
\r
1397 /* IPv6 header. */
\r
1403 uip_ip6addr_t srcipaddr, destipaddr;
\r
1404 #else /* UIP_CONF_IPV6 */
\r
1405 /* IPv4 header. */
\r
1414 u16_t srcipaddr[2],
\r
1416 #endif /* UIP_CONF_IPV6 */
\r
1429 } PACK_STRUCT_END;
\r
1435 /* The ICMP and IP headers. */
\r
1440 struct uip_icmpip_hdr {
\r
1442 /* IPv6 header. */
\r
1448 uip_ip6addr_t srcipaddr, destipaddr;
\r
1449 #else /* UIP_CONF_IPV6 */
\r
1450 /* IPv4 header. */
\r
1459 u16_t srcipaddr[2],
\r
1461 #endif /* UIP_CONF_IPV6 */
\r
1463 /* ICMP (echo) header. */
\r
1466 #if !UIP_CONF_IPV6
\r
1468 #else /* !UIP_CONF_IPV6 */
\r
1469 u8_t flags, reserved1, reserved2, reserved3;
\r
1470 u8_t icmp6data[16];
\r
1472 #endif /* !UIP_CONF_IPV6 */
\r
1473 } PACK_STRUCT_END;
\r
1480 /* The UDP and IP headers. */
\r
1485 struct uip_udpip_hdr {
\r
1487 /* IPv6 header. */
\r
1493 uip_ip6addr_t srcipaddr, destipaddr;
\r
1494 #else /* UIP_CONF_IPV6 */
\r
1504 u16_t srcipaddr[2],
\r
1506 #endif /* UIP_CONF_IPV6 */
\r
1513 } PACK_STRUCT_END;
\r
1522 * The buffer size available for user data in the \ref uip_buf buffer.
\r
1524 * This macro holds the available size for user data in the \ref
\r
1525 * uip_buf buffer. The macro is intended to be used for checking
\r
1526 * bounds of available user data.
\r
1530 snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i);
\r
1533 * \hideinitializer
\r
1535 #define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
\r
1538 #define UIP_PROTO_ICMP 1
\r
1539 #define UIP_PROTO_TCP 6
\r
1540 #define UIP_PROTO_UDP 17
\r
1541 #define UIP_PROTO_ICMP6 58
\r
1543 /* Header sizes. */
\r
1545 #define UIP_IPH_LEN 40
\r
1546 #else /* UIP_CONF_IPV6 */
\r
1547 #define UIP_IPH_LEN 20 /* Size of IP header */
\r
1548 #endif /* UIP_CONF_IPV6 */
\r
1549 #define UIP_UDPH_LEN 8 /* Size of UDP header */
\r
1550 #define UIP_TCPH_LEN 20 /* Size of TCP header */
\r
1551 #define UIP_IPUDPH_LEN (UIP_UDPH_LEN + UIP_IPH_LEN) /* Size of IP +
\r
1554 #define UIP_IPTCPH_LEN (UIP_TCPH_LEN + UIP_IPH_LEN) /* Size of IP +
\r
1557 #define UIP_TCPIP_HLEN UIP_IPTCPH_LEN
\r
1561 extern const uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
\r
1562 #else /* UIP_FIXEDADDR */
\r
1563 extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr;
\r
1564 #endif /* UIP_FIXEDADDR */
\r
1569 * Representation of a 48-bit Ethernet address.
\r
1575 struct uip_eth_addr {
\r
1577 } PACK_STRUCT_END;
\r
1584 * Calculate the Internet checksum over a buffer.
\r
1586 * The Internet checksum is the one's complement of the one's
\r
1587 * complement sum of all 16-bit words in the buffer.
\r
1591 * \param buf A pointer to the buffer over which the checksum is to be
\r
1594 * \param len The length of the buffer over which the checksum is to
\r
1597 * \return The Internet checksum of the buffer.
\r
1599 u16_t uip_chksum(u16_t *buf, u16_t len);
\r
1602 * Calculate the IP header checksum of the packet header in uip_buf.
\r
1604 * The IP header checksum is the Internet checksum of the 20 bytes of
\r
1607 * \return The IP header checksum of the IP header in the uip_buf
\r
1610 u16_t uip_ipchksum(void);
\r
1613 * Calculate the TCP checksum of the packet in uip_buf and uip_appdata.
\r
1615 * The TCP checksum is the Internet checksum of data contents of the
\r
1616 * TCP segment, and a pseudo-header as defined in RFC793.
\r
1618 * \return The TCP checksum of the TCP segment in uip_buf and pointed
\r
1619 * to by uip_appdata.
\r
1621 u16_t uip_tcpchksum(void);
\r
1624 * Calculate the UDP checksum of the packet in uip_buf and uip_appdata.
\r
1626 * The UDP checksum is the Internet checksum of data contents of the
\r
1627 * UDP segment, and a pseudo-header as defined in RFC768.
\r
1629 * \return The UDP checksum of the UDP segment in uip_buf and pointed
\r
1630 * to by uip_appdata.
\r
1632 u16_t uip_udpchksum(void);
\r
1635 #endif /* __UIP_H__ */
\r