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Diffstat (limited to 'lib/lufa/Projects/Webserver/Lib/uip/uip.h')
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diff --git a/lib/lufa/Projects/Webserver/Lib/uip/uip.h b/lib/lufa/Projects/Webserver/Lib/uip/uip.h new file mode 100644 index 000000000..7b87a2c77 --- /dev/null +++ b/lib/lufa/Projects/Webserver/Lib/uip/uip.h @@ -0,0 +1,2130 @@ + +/** + * \addtogroup uip + * @{ + */ + +/** + * \file + * Header file for the uIP TCP/IP stack. + * \author Adam Dunkels <adam@dunkels.com> + * \author Julien Abeille <jabeille@cisco.com> (IPv6 related code) + * \author Mathilde Durvy <mdurvy@cisco.com> (IPv6 related code) + * + * The uIP TCP/IP stack header file contains definitions for a number + * of C macros that are used by uIP programs as well as internal uIP + * structures, TCP/IP header structures and function declarations. + * + */ + +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * 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. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * This file is part of the uIP TCP/IP stack. + * + * $Id: uip.h,v 1.24 2009/04/06 13:18:50 nvt-se Exp $ + * + */ + +#ifndef __UIP_H__ +#define __UIP_H__ + +#include "uipopt.h" + +/** + * Representation of an IP address. + * + */ +#if UIP_CONF_IPV6 +typedef union uip_ip6addr_t { + u8_t u8[16]; /* Initialiser, must come first!!! */ + u16_t u16[8]; +} uip_ip6addr_t; + +typedef uip_ip6addr_t uip_ipaddr_t; +#else /* UIP_CONF_IPV6 */ +typedef union uip_ip4addr_t { + u8_t u8[4]; /* Initialiser, must come first!!! */ + u16_t u16[2]; +#if 0 + u32_t u32; +#endif +} uip_ip4addr_t; +typedef uip_ip4addr_t uip_ipaddr_t; +#endif /* UIP_CONF_IPV6 */ + + +/*---------------------------------------------------------------------------*/ + +/** \brief 16 bit 802.15.4 address */ +struct uip_802154_shortaddr { + u8_t addr[2]; +}; +/** \brief 64 bit 802.15.4 address */ +struct uip_802154_longaddr { + u8_t addr[8]; +}; + +/** \brief 802.11 address */ +struct uip_80211_addr { + u8_t addr[6]; +}; + +/** \brief 802.3 address */ +struct uip_eth_addr { + u8_t addr[6]; +}; + +#if UIP_CONF_LL_802154 +/** \brief 802.15.4 address */ +typedef struct uip_802154_longaddr uip_lladdr_t; +#define UIP_802154_SHORTADDR_LEN 2 +#define UIP_802154_LONGADDR_LEN 8 +#define UIP_LLADDR_LEN UIP_802154_LONGADDR_LEN +#else /*UIP_CONF_LL_802154*/ +#if UIP_CONF_LL_80211 +/** \brief 802.11 address */ +typedef struct uip_80211_addr uip_lladdr_t; +#define UIP_LLADDR_LEN 6 +#else /*UIP_CONF_LL_80211*/ +/** \brief Ethernet address */ +typedef struct uip_eth_addr uip_lladdr_t; +#define UIP_LLADDR_LEN 6 +#endif /*UIP_CONF_LL_80211*/ +#endif /*UIP_CONF_LL_802154*/ + +/*---------------------------------------------------------------------------*/ +/* First, the functions that should be called from the + * system. Initialization, the periodic timer, and incoming packets are + * handled by the following three functions. + */ +/** + * \defgroup uipconffunc uIP configuration functions + * @{ + * + * The uIP configuration functions are used for setting run-time + * parameters in uIP such as IP addresses. + */ + +/** + * Set the IP address of this host. + * + * The IP address is represented as a 4-byte array where the first + * octet of the IP address is put in the first member of the 4-byte + * array. + * + * Example: + \code + + uip_ipaddr_t addr; + + uip_ipaddr(&addr, 192,168,1,2); + uip_sethostaddr(&addr); + + \endcode + * \param addr A pointer to an IP address of type uip_ipaddr_t; + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_sethostaddr(addr) uip_ipaddr_copy(&uip_hostaddr, (addr)) + +/** + * Get the IP address of this host. + * + * The IP address is represented as a 4-byte array where the first + * octet of the IP address is put in the first member of the 4-byte + * array. + * + * Example: + \code + uip_ipaddr_t hostaddr; + + uip_gethostaddr(&hostaddr); + \endcode + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the currently configured IP address. + * + * \hideinitializer + */ +#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), &uip_hostaddr) + +/** + * Set the default router's IP address. + * + * \param addr A pointer to a uip_ipaddr_t variable containing the IP + * address of the default router. + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_setdraddr(addr) uip_ipaddr_copy(&uip_draddr, (addr)) + +/** + * Set the netmask. + * + * \param addr A pointer to a uip_ipaddr_t variable containing the IP + * address of the netmask. + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_setnetmask(addr) uip_ipaddr_copy(&uip_netmask, (addr)) + + +/** + * Get the default router's IP address. + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the IP address of the default router. + * + * \hideinitializer + */ +#define uip_getdraddr(addr) uip_ipaddr_copy((addr), &uip_draddr) + +/** + * Get the netmask. + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the value of the netmask. + * + * \hideinitializer + */ +#define uip_getnetmask(addr) uip_ipaddr_copy((addr), &uip_netmask) + +/** @} */ + +/** + * \defgroup uipinit uIP initialization functions + * @{ + * + * The uIP initialization functions are used for booting uIP. + */ + +/** + * uIP initialization function. + * + * This function should be called at boot up to initialize the uIP + * TCP/IP stack. + */ +void uip_init(void); + +/** + * uIP initialization function. + * + * This function may be used at boot time to set the initial ip_id. + */ +void uip_setipid(u16_t id); + +/** @} */ + +/** + * \defgroup uipdevfunc uIP device driver functions + * @{ + * + * These functions are used by a network device driver for interacting + * with uIP. + */ + +/** + * Process an incoming packet. + * + * This function should be called when the device driver has received + * a packet from the network. The packet from the device driver must + * be present in the uip_buf buffer, and the length of the packet + * should be placed in the uip_len variable. + * + * When the function returns, there may be an outbound packet placed + * in the uip_buf packet buffer. If so, the uip_len variable is set to + * the length of the packet. If no packet is to be sent out, the + * uip_len variable is set to 0. + * + * The usual way of calling the function is presented by the source + * code below. + \code + uip_len = devicedriver_poll(); + if(uip_len > 0) { + uip_input(); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note If you are writing a uIP device driver that needs ARP + * (Address Resolution Protocol), e.g., when running uIP over + * Ethernet, you will need to call the uIP ARP code before calling + * this function: + \code + #define BUF ((struct uip_eth_hdr *)&uip_buf[0]) + uip_len = ethernet_devicedrver_poll(); + if(uip_len > 0) { + if(BUF->type == HTONS(UIP_ETHTYPE_IP)) { + uip_arp_ipin(); + uip_input(); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) { + uip_arp_arpin(); + if(uip_len > 0) { + ethernet_devicedriver_send(); + } + } + \endcode + * + * \hideinitializer + */ +#define uip_input() uip_process(UIP_DATA) + + +/** + * Periodic processing for a connection identified by its number. + * + * This function does the necessary periodic processing (timers, + * polling) for a uIP TCP connection, and should be called when the + * periodic uIP timer goes off. It should be called for every + * connection, regardless of whether they are open of closed. + * + * When the function returns, it may have an outbound packet waiting + * for service in the uIP packet buffer, and if so the uip_len + * variable is set to a value larger than zero. The device driver + * should be called to send out the packet. + * + * The usual way of calling the function is through a for() loop like + * this: + \code + for(i = 0; i < UIP_CONNS; ++i) { + uip_periodic(i); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note If you are writing a uIP device driver that needs ARP + * (Address Resolution Protocol), e.g., when running uIP over + * Ethernet, you will need to call the uip_arp_out() function before + * calling the device driver: + \code + for(i = 0; i < UIP_CONNS; ++i) { + uip_periodic(i); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } + \endcode + * + * \param conn The number of the connection which is to be periodically polled. + * + * \hideinitializer + */ +#if UIP_TCP +#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \ + uip_process(UIP_TIMER); } while (0) + +/** + * + * + */ +#define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED) + +/** + * Perform periodic processing for a connection identified by a pointer + * to its structure. + * + * Same as uip_periodic() but takes a pointer to the actual uip_conn + * struct instead of an integer as its argument. This function can be + * used to force periodic processing of a specific connection. + * + * \param conn A pointer to the uip_conn struct for the connection to + * be processed. + * + * \hideinitializer + */ +#define uip_periodic_conn(conn) do { uip_conn = conn; \ + uip_process(UIP_TIMER); } while (0) + +/** + * Request that a particular connection should be polled. + * + * Similar to uip_periodic_conn() but does not perform any timer + * processing. The application is polled for new data. + * + * \param conn A pointer to the uip_conn struct for the connection to + * be processed. + * + * \hideinitializer + */ +#define uip_poll_conn(conn) do { uip_conn = conn; \ + uip_process(UIP_POLL_REQUEST); } while (0) + +#endif /* UIP_TCP */ + +#if UIP_UDP +/** + * Periodic processing for a UDP connection identified by its number. + * + * This function is essentially the same as uip_periodic(), but for + * UDP connections. It is called in a similar fashion as the + * uip_periodic() function: + \code + for(i = 0; i < UIP_UDP_CONNS; i++) { + uip_udp_periodic(i); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note As for the uip_periodic() function, special care has to be + * taken when using uIP together with ARP and Ethernet: + \code + for(i = 0; i < UIP_UDP_CONNS; i++) { + uip_udp_periodic(i); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } + \endcode + * + * \param conn The number of the UDP connection to be processed. + * + * \hideinitializer + */ +#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \ + uip_process(UIP_UDP_TIMER); } while(0) + +/** + * Periodic processing for a UDP connection identified by a pointer to + * its structure. + * + * Same as uip_udp_periodic() but takes a pointer to the actual + * uip_conn struct instead of an integer as its argument. This + * function can be used to force periodic processing of a specific + * connection. + * + * \param conn A pointer to the uip_udp_conn struct for the connection + * to be processed. + * + * \hideinitializer + */ +#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \ + uip_process(UIP_UDP_TIMER); } while(0) +#endif /* UIP_UDP */ + +/** \brief Abandon the reassembly of the current packet */ +void uip_reass_over(void); + +/** + * The uIP packet buffer. + * + * The uip_buf array is used to hold incoming and outgoing + * packets. The device driver should place incoming data into this + * buffer. When sending data, the device driver should read the link + * level headers and the TCP/IP headers from this buffer. The size of + * the link level headers is configured by the UIP_LLH_LEN define. + * + * \note The application data need not be placed in this buffer, so + * the device driver must read it from the place pointed to by the + * uip_appdata pointer as illustrated by the following example: + \code + void + devicedriver_send(void) + { + hwsend(&uip_buf[0], UIP_LLH_LEN); + if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) { + hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN); + } else { + hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN); + hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN); + } + } + \endcode +*/ +extern u8_t uip_buf[UIP_BUFSIZE+2]; + + + +/** @} */ + +/*---------------------------------------------------------------------------*/ +/* Functions that are used by the uIP application program. Opening and + * closing connections, sending and receiving data, etc. is all + * handled by the functions below. + */ +/** + * \defgroup uipappfunc uIP application functions + * @{ + * + * Functions used by an application running of top of uIP. + */ + +/** + * Start listening to the specified port. + * + * \note Since this function expects the port number in network byte + * order, a conversion using HTONS() or htons() is necessary. + * + \code + uip_listen(HTONS(80)); + \endcode + * + * \param port A 16-bit port number in network byte order. + */ +void uip_listen(u16_t port); + +/** + * Stop listening to the specified port. + * + * \note Since this function expects the port number in network byte + * order, a conversion using HTONS() or htons() is necessary. + * + \code + uip_unlisten(HTONS(80)); + \endcode + * + * \param port A 16-bit port number in network byte order. + */ +void uip_unlisten(u16_t port); + +/** + * Connect to a remote host using TCP. + * + * This function is used to start a new connection to the specified + * port on the specified host. It allocates a new connection identifier, + * sets the connection to the SYN_SENT state and sets the + * retransmission timer to 0. This will cause a TCP SYN segment to be + * sent out the next time this connection is periodically processed, + * which usually is done within 0.5 seconds after the call to + * uip_connect(). + * + * \note This function is available only if support for active open + * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h. + * + * \note Since this function requires the port number to be in network + * byte order, a conversion using HTONS() or htons() is necessary. + * + \code + uip_ipaddr_t ipaddr; + + uip_ipaddr(&ipaddr, 192,168,1,2); + uip_connect(&ipaddr, HTONS(80)); + \endcode + * + * \param ripaddr The IP address of the remote host. + * + * \param port A 16-bit port number in network byte order. + * + * \return A pointer to the uIP connection identifier for the new connection, + * or NULL if no connection could be allocated. + * + */ +struct uip_conn *uip_connect(uip_ipaddr_t *ripaddr, u16_t port); + + + +/** + * \internal + * + * Check if a connection has outstanding (i.e., unacknowledged) data. + * + * \param conn A pointer to the uip_conn structure for the connection. + * + * \hideinitializer + */ +#define uip_outstanding(conn) ((conn)->len) + +/** + * Send data on the current connection. + * + * This function is used to send out a single segment of TCP + * data. Only applications that have been invoked by uIP for event + * processing can send data. + * + * The amount of data that actually is sent out after a call to this + * function is determined by the maximum amount of data TCP allows. uIP + * will automatically crop the data so that only the appropriate + * amount of data is sent. The function uip_mss() can be used to query + * uIP for the amount of data that actually will be sent. + * + * \note This function does not guarantee that the sent data will + * arrive at the destination. If the data is lost in the network, the + * application will be invoked with the uip_rexmit() event being + * set. The application will then have to resend the data using this + * function. + * + * \param data A pointer to the data which is to be sent. + * + * \param len The maximum amount of data bytes to be sent. + * + * \hideinitializer + */ +void uip_send(const void *data, int len); + +/** + * The length of any incoming data that is currently available (if available) + * in the uip_appdata buffer. + * + * The test function uip_data() must first be used to check if there + * is any data available at all. + * + * \hideinitializer + */ +/*void uip_datalen(void);*/ +#define uip_datalen() uip_len + +/** + * The length of any out-of-band data (urgent data) that has arrived + * on the connection. + * + * \note The configuration parameter UIP_URGDATA must be set for this + * function to be enabled. + * + * \hideinitializer + */ +#define uip_urgdatalen() uip_urglen + +/** + * Close the current connection. + * + * This function will close the current connection in a nice way. + * + * \hideinitializer + */ +#define uip_close() (uip_flags = UIP_CLOSE) + +/** + * Abort the current connection. + * + * This function will abort (reset) the current connection, and is + * usually used when an error has occurred that prevents using the + * uip_close() function. + * + * \hideinitializer + */ +#define uip_abort() (uip_flags = UIP_ABORT) + +/** + * Tell the sending host to stop sending data. + * + * This function will close our receiver's window so that we stop + * receiving data for the current connection. + * + * \hideinitializer + */ +#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED) + +/** + * Find out if the current connection has been previously stopped with + * uip_stop(). + * + * \hideinitializer + */ +#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED) + +/** + * Restart the current connection, if is has previously been stopped + * with uip_stop(). + * + * This function will open the receiver's window again so that we + * start receiving data for the current connection. + * + * \hideinitializer + */ +#define uip_restart() do { uip_flags |= UIP_NEWDATA; \ + uip_conn->tcpstateflags &= ~UIP_STOPPED; \ + } while(0) + + +/* uIP tests that can be made to determine in what state the current + connection is, and what the application function should do. */ + +/** + * Is the current connection a UDP connection? + * + * This function checks whether the current connection is a UDP connection. + * + * \hideinitializer + * + */ +#define uip_udpconnection() (uip_conn == NULL) + +/** + * Is new incoming data available? + * + * Will reduce to non-zero if there is new data for the application + * present at the uip_appdata pointer. The size of the data is + * available through the uip_len variable. + * + * \hideinitializer + */ +#define uip_newdata() (uip_flags & UIP_NEWDATA) + +/** + * Has previously sent data been acknowledged? + * + * Will reduce to non-zero if the previously sent data has been + * acknowledged by the remote host. This means that the application + * can send new data. + * + * \hideinitializer + */ +#define uip_acked() (uip_flags & UIP_ACKDATA) + +/** + * Has the connection just been connected? + * + * Reduces to non-zero if the current connection has been connected to + * a remote host. This will happen both if the connection has been + * actively opened (with uip_connect()) or passively opened (with + * uip_listen()). + * + * \hideinitializer + */ +#define uip_connected() (uip_flags & UIP_CONNECTED) + +/** + * Has the connection been closed by the other end? + * + * Is non-zero if the connection has been closed by the remote + * host. The application may then do the necessary clean-ups. + * + * \hideinitializer + */ +#define uip_closed() (uip_flags & UIP_CLOSE) + +/** + * Has the connection been aborted by the other end? + * + * Non-zero if the current connection has been aborted (reset) by the + * remote host. + * + * \hideinitializer + */ +#define uip_aborted() (uip_flags & UIP_ABORT) + +/** + * Has the connection timed out? + * + * Non-zero if the current connection has been aborted due to too many + * retransmissions. + * + * \hideinitializer + */ +#define uip_timedout() (uip_flags & UIP_TIMEDOUT) + +/** + * Do we need to retransmit previously data? + * + * Reduces to non-zero if the previously sent data has been lost in + * the network, and the application should retransmit it. The + * application should send the exact same data as it did the last + * time, using the uip_send() function. + * + * \hideinitializer + */ +#define uip_rexmit() (uip_flags & UIP_REXMIT) + +/** + * Is the connection being polled by uIP? + * + * Is non-zero if the reason the application is invoked is that the + * current connection has been idle for a while and should be + * polled. + * + * The polling event can be used for sending data without having to + * wait for the remote host to send data. + * + * \hideinitializer + */ +#define uip_poll() (uip_flags & UIP_POLL) + +/** + * Get the initial maximum segment size (MSS) of the current + * connection. + * + * \hideinitializer + */ +#define uip_initialmss() (uip_conn->initialmss) + +/** + * Get the current maximum segment size that can be sent on the current + * connection. + * + * The current maximum segment size that can be sent on the + * connection is computed from the receiver's window and the MSS of + * the connection (which also is available by calling + * uip_initialmss()). + * + * \hideinitializer + */ +#define uip_mss() (uip_conn->mss) + +/** + * Set up a new UDP connection. + * + * This function sets up a new UDP connection. The function will + * automatically allocate an unused local port for the new + * connection. However, another port can be chosen by using the + * uip_udp_bind() call, after the uip_udp_new() function has been + * called. + * + * Example: + \code + uip_ipaddr_t addr; + struct uip_udp_conn *c; + + uip_ipaddr(&addr, 192,168,2,1); + c = uip_udp_new(&addr, HTONS(12345)); + if(c != NULL) { + uip_udp_bind(c, HTONS(12344)); + } + \endcode + * \param ripaddr The IP address of the remote host. + * + * \param rport The remote port number in network byte order. + * + * \return The uip_udp_conn structure for the new connection or NULL + * if no connection could be allocated. + */ +struct uip_udp_conn *uip_udp_new(const uip_ipaddr_t *ripaddr, u16_t rport); + +/** + * Removed a UDP connection. + * + * \param conn A pointer to the uip_udp_conn structure for the connection. + * + * \hideinitializer + */ +#define uip_udp_remove(conn) (conn)->lport = 0 + +/** + * Bind a UDP connection to a local port. + * + * \param conn A pointer to the uip_udp_conn structure for the + * connection. + * + * \param port The local port number, in network byte order. + * + * \hideinitializer + */ +#define uip_udp_bind(conn, port) (conn)->lport = port + +/** + * Send a UDP datagram of length len on the current connection. + * + * This function can only be called in response to a UDP event (poll + * or newdata). The data must be present in the uip_buf buffer, at the + * place pointed to by the uip_appdata pointer. + * + * \param len The length of the data in the uip_buf buffer. + * + * \hideinitializer + */ +#define uip_udp_send(len) uip_send((char *)uip_appdata, len) + +/** @} */ + +/* uIP convenience and converting functions. */ + +/** + * \defgroup uipconvfunc uIP conversion functions + * @{ + * + * These functions can be used for converting between different data + * formats used by uIP. + */ + +/** + * Convert an IP address to four bytes separated by commas. + * + * Example: + \code + uip_ipaddr_t ipaddr; + printf("ipaddr=%d.%d.%d.%d\n", uip_ipaddr_to_quad(&ipaddr)); + \endcode + * + * \param a A pointer to a uip_ipaddr_t. + * \hideinitializer + */ +#define uip_ipaddr_to_quad(a) (a)->u8[0],(a)->u8[1],(a)->u8[2],(a)->u8[3] + +/** + * Construct an IP address from four bytes. + * + * This function constructs an IP address of the type that uIP handles + * internally from four bytes. The function is handy for specifying IP + * addresses to use with e.g. the uip_connect() function. + * + * Example: + \code + uip_ipaddr_t ipaddr; + struct uip_conn *c; + + uip_ipaddr(&ipaddr, 192,168,1,2); + c = uip_connect(&ipaddr, HTONS(80)); + \endcode + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the IP address. + * + * \param addr0 The first octet of the IP address. + * \param addr1 The second octet of the IP address. + * \param addr2 The third octet of the IP address. + * \param addr3 The forth octet of the IP address. + * + * \hideinitializer + */ +#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \ + (addr)->u8[0] = addr0; \ + (addr)->u8[1] = addr1; \ + (addr)->u8[2] = addr2; \ + (addr)->u8[3] = addr3; \ + } while(0) + +/** + * Construct an IPv6 address from eight 16-bit words. + * + * This function constructs an IPv6 address. + * + * \hideinitializer + */ +#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \ + (addr)->u16[0] = HTONS(addr0); \ + (addr)->u16[1] = HTONS(addr1); \ + (addr)->u16[2] = HTONS(addr2); \ + (addr)->u16[3] = HTONS(addr3); \ + (addr)->u16[4] = HTONS(addr4); \ + (addr)->u16[5] = HTONS(addr5); \ + (addr)->u16[6] = HTONS(addr6); \ + (addr)->u16[7] = HTONS(addr7); \ + } while(0) + +/** + * Construct an IPv6 address from sixteen 8-bit words. + * + * This function constructs an IPv6 address. + * + * \hideinitializer + */ +#define uip_ip6addr_u8(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7,addr8,addr9,addr10,addr11,addr12,addr13,addr14,addr15) do { \ + (addr)->u8[0] = addr0; \ + (addr)->u8[1] = addr1; \ + (addr)->u8[2] = addr2; \ + (addr)->u8[3] = addr3; \ + (addr)->u8[4] = addr4; \ + (addr)->u8[5] = addr5; \ + (addr)->u8[6] = addr6; \ + (addr)->u8[7] = addr7; \ + (addr)->u8[8] = addr8; \ + (addr)->u8[9] = addr9; \ + (addr)->u8[10] = addr10; \ + (addr)->u8[11] = addr11; \ + (addr)->u8[12] = addr12; \ + (addr)->u8[13] = addr13; \ + (addr)->u8[14] = addr14; \ + (addr)->u8[15] = addr15; \ + } while(0) + + +/** + * Copy an IP address to another IP address. + * + * Copies an IP address from one place to another. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr_copy(&ipaddr2, &ipaddr1); + \endcode + * + * \param dest The destination for the copy. + * \param src The source from where to copy. + * + * \hideinitializer + */ +#ifndef uip_ipaddr_copy +#define uip_ipaddr_copy(dest, src) (*(dest) = *(src)) +#endif + +/** + * Compare two IP addresses + * + * Compares two IP addresses. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) { + printf("They are the same"); + } + \endcode + * + * \param addr1 The first IP address. + * \param addr2 The second IP address. + * + * \hideinitializer + */ +#if !UIP_CONF_IPV6 +#define uip_ipaddr_cmp(addr1, addr2) ((addr1)->u16[0] == (addr2)->u16[0] && \ + (addr1)->u16[1] == (addr2)->u16[1]) +#else /* !UIP_CONF_IPV6 */ +#define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0) +#endif /* !UIP_CONF_IPV6 */ + +/** + * Compare two IP addresses with netmasks + * + * Compares two IP addresses with netmasks. The masks are used to mask + * out the bits that are to be compared. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2, mask; + + uip_ipaddr(&mask, 255,255,255,0); + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr(&ipaddr2, 192,16,1,3); + if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) { + printf("They are the same"); + } + \endcode + * + * \param addr1 The first IP address. + * \param addr2 The second IP address. + * \param mask The netmask. + * + * \hideinitializer + */ +#if !UIP_CONF_IPV6 +#define uip_ipaddr_maskcmp(addr1, addr2, mask) \ + (((((u16_t *)addr1)[0] & ((u16_t *)mask)[0]) == \ + (((u16_t *)addr2)[0] & ((u16_t *)mask)[0])) && \ + ((((u16_t *)addr1)[1] & ((u16_t *)mask)[1]) == \ + (((u16_t *)addr2)[1] & ((u16_t *)mask)[1]))) +#else +#define uip_ipaddr_prefixcmp(addr1, addr2, length) (memcmp(addr1, addr2, length>>3) == 0) +#endif + + +/** + * Check if an address is a broadcast address for a network. + * + * Checks if an address is the broadcast address for a network. The + * network is defined by an IP address that is on the network and the + * network's netmask. + * + * \param addr The IP address. + * \param netaddr The network's IP address. + * \param netmask The network's netmask. + * + * \hideinitializer + */ +/*#define uip_ipaddr_isbroadcast(addr, netaddr, netmask) + ((uip_ipaddr_t *)(addr)).u16 & ((uip_ipaddr_t *)(addr)).u16*/ + + + +/** + * Mask out the network part of an IP address. + * + * Masks out the network part of an IP address, given the address and + * the netmask. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2, netmask; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr(&netmask, 255,255,255,0); + uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask); + \endcode + * + * In the example above, the variable "ipaddr2" will contain the IP + * address 192.168.1.0. + * + * \param dest Where the result is to be placed. + * \param src The IP address. + * \param mask The netmask. + * + * \hideinitializer + */ +#define uip_ipaddr_mask(dest, src, mask) do { \ + ((u16_t *)dest)[0] = ((u16_t *)src)[0] & ((u16_t *)mask)[0]; \ + ((u16_t *)dest)[1] = ((u16_t *)src)[1] & ((u16_t *)mask)[1]; \ + } while(0) + +/** + * Pick the first octet of an IP address. + * + * Picks out the first octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + u8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr1(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 1. + * + * \hideinitializer + */ +#define uip_ipaddr1(addr) ((addr)->u8[0]) + +/** + * Pick the second octet of an IP address. + * + * Picks out the second octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + u8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr2(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 2. + * + * \hideinitializer + */ +#define uip_ipaddr2(addr) ((addr)->u8[1]) + +/** + * Pick the third octet of an IP address. + * + * Picks out the third octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + u8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr3(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 3. + * + * \hideinitializer + */ +#define uip_ipaddr3(addr) ((addr)->u8[2]) + +/** + * Pick the fourth octet of an IP address. + * + * Picks out the fourth octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + u8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr4(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 4. + * + * \hideinitializer + */ +#define uip_ipaddr4(addr) ((addr)->u8[3]) + +/** + * Convert 16-bit quantity from host byte order to network byte order. + * + * This macro is primarily used for converting constants from host + * byte order to network byte order. For converting variables to + * network byte order, use the htons() function instead. + * + * \hideinitializer + */ +#ifndef HTONS +# if UIP_BYTE_ORDER == UIP_BIG_ENDIAN +# define HTONS(n) (n) +# define HTONL(n) (n) +# else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ +# define HTONS(n) (u16_t)((((u16_t) (n)) << 8) | (((u16_t) (n)) >> 8)) +# define HTONL(n) (((u32_t)HTONS(n) << 16) | HTONS((u32_t)(n) >> 16)) +# endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ +#else +#error "HTONS already defined!" +#endif /* HTONS */ + +/** + * Convert 16-bit quantity from host byte order to network byte order. + * + * This function is primarily used for converting variables from host + * byte order to network byte order. For converting constants to + * network byte order, use the HTONS() macro instead. + */ +#ifndef htons +u16_t htons(u16_t val); +#endif /* htons */ +#ifndef ntohs +#define ntohs htons +#endif + +#ifndef htonl +u32_t htonl(u32_t val); +#endif /* htonl */ +#ifndef ntohl +#define ntohl htonl +#endif + +/** @} */ + +/** + * Pointer to the application data in the packet buffer. + * + * This pointer points to the application data when the application is + * called. If the application wishes to send data, the application may + * use this space to write the data into before calling uip_send(). + */ +extern void *uip_appdata; + +#if UIP_URGDATA > 0 +/* u8_t *uip_urgdata: + * + * This pointer points to any urgent data that has been received. Only + * present if compiled with support for urgent data (UIP_URGDATA). + */ +extern void *uip_urgdata; +#endif /* UIP_URGDATA > 0 */ + + +/** + * \defgroup uipdrivervars Variables used in uIP device drivers + * @{ + * + * uIP has a few global variables that are used in device drivers for + * uIP. + */ + +/** + * The length of the packet in the uip_buf buffer. + * + * The global variable uip_len holds the length of the packet in the + * uip_buf buffer. + * + * When the network device driver calls the uIP input function, + * uip_len should be set to the length of the packet in the uip_buf + * buffer. + * + * When sending packets, the device driver should use the contents of + * the uip_len variable to determine the length of the outgoing + * packet. + * + */ +extern u16_t uip_len; + +/** + * The length of the extension headers + */ +extern u8_t uip_ext_len; +/** @} */ + +#if UIP_URGDATA > 0 +extern u16_t uip_urglen, uip_surglen; +#endif /* UIP_URGDATA > 0 */ + + +/** + * Representation of a uIP TCP connection. + * + * The uip_conn structure is used for identifying a connection. All + * but one field in the structure are to be considered read-only by an + * application. The only exception is the appstate field whose purpose + * is to let the application store application-specific state (e.g., + * file pointers) for the connection. The type of this field is + * configured in the "uipopt.h" header file. + */ +struct uip_conn { + uip_ipaddr_t ripaddr; /**< The IP address of the remote host. */ + + u16_t lport; /**< The local TCP port, in network byte order. */ + u16_t rport; /**< The local remote TCP port, in network byte + order. */ + + u8_t rcv_nxt[4]; /**< The sequence number that we expect to + receive next. */ + u8_t snd_nxt[4]; /**< The sequence number that was last sent by + us. */ + u16_t len; /**< Length of the data that was previously sent. */ + u16_t mss; /**< Current maximum segment size for the + connection. */ + u16_t initialmss; /**< Initial maximum segment size for the + connection. */ + u8_t sa; /**< Retransmission time-out calculation state + variable. */ + u8_t sv; /**< Retransmission time-out calculation state + variable. */ + u8_t rto; /**< Retransmission time-out. */ + u8_t tcpstateflags; /**< TCP state and flags. */ + u8_t timer; /**< The retransmission timer. */ + u8_t nrtx; /**< The number of retransmissions for the last + segment sent. */ + + /** The application state. */ + uip_tcp_appstate_t appstate; +}; + + +/** + * Pointer to the current TCP connection. + * + * The uip_conn pointer can be used to access the current TCP + * connection. + */ + +extern struct uip_conn *uip_conn; +#if UIP_TCP +/* The array containing all uIP connections. */ +extern struct uip_conn uip_conns[UIP_CONNS]; +#endif + +/** + * \addtogroup uiparch + * @{ + */ + +/** + * 4-byte array used for the 32-bit sequence number calculations. + */ +extern u8_t uip_acc32[4]; +/** @} */ + +/** + * Representation of a uIP UDP connection. + */ +struct uip_udp_conn { + uip_ipaddr_t ripaddr; /**< The IP address of the remote peer. */ + u16_t lport; /**< The local port number in network byte order. */ + u16_t rport; /**< The remote port number in network byte order. */ + u8_t ttl; /**< Default time-to-live. */ + + /** The application state. */ + uip_udp_appstate_t appstate; +}; + +/** + * The current UDP connection. + */ +extern struct uip_udp_conn *uip_udp_conn; +extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS]; + +struct uip_router { + int (*activate)(void); + int (*deactivate)(void); + uip_ipaddr_t *(*lookup)(uip_ipaddr_t *destipaddr, uip_ipaddr_t *nexthop); +}; + +#if UIP_CONF_ROUTER +extern const struct uip_router *uip_router; + +/** + * uIP routing driver registration function. + */ +void uip_router_register(const struct uip_router *router); +#endif /*UIP_CONF_ROUTER*/ + +#if UIP_CONF_ICMP6 +struct uip_icmp6_conn { + uip_icmp6_appstate_t appstate; +}; +extern struct uip_icmp6_conn uip_icmp6_conns; +#endif /*UIP_CONF_ICMP6*/ + +/** + * The uIP TCP/IP statistics. + * + * This is the variable in which the uIP TCP/IP statistics are gathered. + */ +#if UIP_STATISTICS == 1 +extern struct uip_stats uip_stat; +#define UIP_STAT(s) s +#else +#define UIP_STAT(s) +#endif /* UIP_STATISTICS == 1 */ + +/** + * The structure holding the TCP/IP statistics that are gathered if + * UIP_STATISTICS is set to 1. + * + */ +struct uip_stats { + struct { + uip_stats_t recv; /**< Number of received packets at the IP + layer. */ + uip_stats_t sent; /**< Number of sent packets at the IP + layer. */ + uip_stats_t forwarded;/**< Number of forwarded packets at the IP + layer. */ + uip_stats_t drop; /**< Number of dropped packets at the IP + layer. */ + uip_stats_t vhlerr; /**< Number of packets dropped due to wrong + IP version or header length. */ + uip_stats_t hblenerr; /**< Number of packets dropped due to wrong + IP length, high byte. */ + uip_stats_t lblenerr; /**< Number of packets dropped due to wrong + IP length, low byte. */ + uip_stats_t fragerr; /**< Number of packets dropped since they + were IP fragments. */ + uip_stats_t chkerr; /**< Number of packets dropped due to IP + checksum errors. */ + uip_stats_t protoerr; /**< Number of packets dropped since they + were neither ICMP, UDP nor TCP. */ + } ip; /**< IP statistics. */ + struct { + uip_stats_t recv; /**< Number of received ICMP packets. */ + uip_stats_t sent; /**< Number of sent ICMP packets. */ + uip_stats_t drop; /**< Number of dropped ICMP packets. */ + uip_stats_t typeerr; /**< Number of ICMP packets with a wrong + type. */ + uip_stats_t chkerr; /**< Number of ICMP packets with a bad + checksum. */ + } icmp; /**< ICMP statistics. */ +#if UIP_TCP + struct { + uip_stats_t recv; /**< Number of received TCP segments. */ + uip_stats_t sent; /**< Number of sent TCP segments. */ + uip_stats_t drop; /**< Number of dropped TCP segments. */ + uip_stats_t chkerr; /**< Number of TCP segments with a bad + checksum. */ + uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK + number. */ + uip_stats_t rst; /**< Number of received TCP RST (reset) segments. */ + uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */ + uip_stats_t syndrop; /**< Number of dropped SYNs due to too few + connections was available. */ + uip_stats_t synrst; /**< Number of SYNs for closed ports, + triggering a RST. */ + } tcp; /**< TCP statistics. */ +#endif +#if UIP_UDP + struct { + uip_stats_t drop; /**< Number of dropped UDP segments. */ + uip_stats_t recv; /**< Number of received UDP segments. */ + uip_stats_t sent; /**< Number of sent UDP segments. */ + uip_stats_t chkerr; /**< Number of UDP segments with a bad + checksum. */ + } udp; /**< UDP statistics. */ +#endif /* UIP_UDP */ +#if UIP_CONF_IPV6 + struct { + uip_stats_t drop; /**< Number of dropped ND6 packets. */ + uip_stats_t recv; /**< Number of received ND6 packets */ + uip_stats_t sent; /**< Number of sent ND6 packets */ + } nd6; +#endif /*UIP_CONF_IPV6*/ +}; + + +/*---------------------------------------------------------------------------*/ +/* All the stuff below this point is internal to uIP and should not be + * used directly by an application or by a device driver. + */ +/*---------------------------------------------------------------------------*/ + + + +/* u8_t uip_flags: + * + * When the application is called, uip_flags will contain the flags + * that are defined in this file. Please read below for more + * information. + */ +extern u8_t uip_flags; + +/* The following flags may be set in the global variable uip_flags + before calling the application callback. The UIP_ACKDATA, + UIP_NEWDATA, and UIP_CLOSE flags may both be set at the same time, + whereas the others are mutually exclusive. Note that these flags + should *NOT* be accessed directly, but only through the uIP + functions/macros. */ + +#define UIP_ACKDATA 1 /* Signifies that the outstanding data was + acked and the application should send + out new data instead of retransmitting + the last data. */ +#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent + us new data. */ +#define UIP_REXMIT 4 /* Tells the application to retransmit the + data that was last sent. */ +#define UIP_POLL 8 /* Used for polling the application, to + check if the application has data that + it wants to send. */ +#define UIP_CLOSE 16 /* The remote host has closed the + connection, thus the connection has + gone away. Or the application signals + that it wants to close the + connection. */ +#define UIP_ABORT 32 /* The remote host has aborted the + connection, thus the connection has + gone away. Or the application signals + that it wants to abort the + connection. */ +#define UIP_CONNECTED 64 /* We have got a connection from a remote + host and have set up a new connection + for it, or an active connection has + been successfully established. */ + +#define UIP_TIMEDOUT 128 /* The connection has been aborted due to + too many retransmissions. */ + + +/** + * \brief process the options within a hop by hop or destination option header + * \retval 0: nothing to send, + * \retval 1: drop pkt + * \retval 2: ICMP error message to send +*/ +/*static u8_t +uip_ext_hdr_options_process(); */ + +/* uip_process(flag): + * + * The actual uIP function which does all the work. + */ +void uip_process(u8_t flag); + + /* The following flags are passed as an argument to the uip_process() + function. They are used to distinguish between the two cases where + uip_process() is called. It can be called either because we have + incoming data that should be processed, or because the periodic + timer has fired. These values are never used directly, but only in + the macros defined in this file. */ + +#define UIP_DATA 1 /* Tells uIP that there is incoming + data in the uip_buf buffer. The + length of the data is stored in the + global variable uip_len. */ +#define UIP_TIMER 2 /* Tells uIP that the periodic timer + has fired. */ +#define UIP_POLL_REQUEST 3 /* Tells uIP that a connection should + be polled. */ +#define UIP_UDP_SEND_CONN 4 /* Tells uIP that a UDP datagram + should be constructed in the + uip_buf buffer. */ +#if UIP_UDP +#define UIP_UDP_TIMER 5 +#endif /* UIP_UDP */ + +/* The TCP states used in the uip_conn->tcpstateflags. */ +#define UIP_CLOSED 0 +#define UIP_SYN_RCVD 1 +#define UIP_SYN_SENT 2 +#define UIP_ESTABLISHED 3 +#define UIP_FIN_WAIT_1 4 +#define UIP_FIN_WAIT_2 5 +#define UIP_CLOSING 6 +#define UIP_TIME_WAIT 7 +#define UIP_LAST_ACK 8 +#define UIP_TS_MASK 15 + +#define UIP_STOPPED 16 + +/* The TCP and IP headers. */ +struct uip_tcpip_hdr { +#if UIP_CONF_IPV6 + /* IPv6 header. */ + u8_t vtc, + tcflow; + u16_t flow; + u8_t len[2]; + u8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* UIP_CONF_IPV6 */ + /* IPv4 header. */ + u8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + u16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* UIP_CONF_IPV6 */ + + /* TCP header. */ + u16_t srcport, + destport; + u8_t seqno[4], + ackno[4], + tcpoffset, + flags, + wnd[2]; + u16_t tcpchksum; + u8_t urgp[2]; + u8_t optdata[4]; +}; + +/* The ICMP and IP headers. */ +struct uip_icmpip_hdr { +#if UIP_CONF_IPV6 + /* IPv6 header. */ + u8_t vtc, + tcf; + u16_t flow; + u8_t len[2]; + u8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* UIP_CONF_IPV6 */ + /* IPv4 header. */ + u8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + u16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* UIP_CONF_IPV6 */ + + /* ICMP header. */ + u8_t type, icode; + u16_t icmpchksum; +#if !UIP_CONF_IPV6 + u16_t id, seqno; + u8_t payload[1]; +#endif /* !UIP_CONF_IPV6 */ +}; + + +/* The UDP and IP headers. */ +struct uip_udpip_hdr { +#if UIP_CONF_IPV6 + /* IPv6 header. */ + u8_t vtc, + tcf; + u16_t flow; + u8_t len[2]; + u8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* UIP_CONF_IPV6 */ + /* IP header. */ + u8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + u16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* UIP_CONF_IPV6 */ + + /* UDP header. */ + u16_t srcport, + destport; + u16_t udplen; + u16_t udpchksum; +}; + +/* + * In IPv6 the length of the L3 headers before the transport header is + * not fixed, due to the possibility to include extension option headers + * after the IP header. hence we split here L3 and L4 headers + */ +/* The IP header */ +struct uip_ip_hdr { +#if UIP_CONF_IPV6 + /* IPV6 header */ + u8_t vtc; + u8_t tcflow; + u16_t flow; + u8_t len[2]; + u8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* UIP_CONF_IPV6 */ + /* IPV4 header */ + u8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + u16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* UIP_CONF_IPV6 */ +}; + + +/* + * IPv6 extension option headers: we are able to process + * the 4 extension headers defined in RFC2460 (IPv6): + * - Hop by hop option header, destination option header: + * These two are not used by any core IPv6 protocol, hence + * we just read them and go to the next. They convey options, + * the options defined in RFC2460 are Pad1 and PadN, which do + * some padding, and that we do not need to read (the length + * field in the header is enough) + * - Routing header: this one is most notably used by MIPv6, + * which we do not implement, hence we just read it and go + * to the next + * - Fragmentation header: we read this header and are able to + * reassemble packets + * + * We do not offer any means to send packets with extension headers + * + * We do not implement Authentication and ESP headers, which are + * used in IPSec and defined in RFC4302,4303,4305,4385 + */ +/* common header part */ +struct uip_ext_hdr { + u8_t next; + u8_t len; +}; + +/* Hop by Hop option header */ +struct uip_hbho_hdr { + u8_t next; + u8_t len; +}; + +/* destination option header */ +struct uip_desto_hdr { + u8_t next; + u8_t len; +}; + +/* We do not define structures for PAD1 and PADN options */ + +/* + * routing header + * the routing header as 4 common bytes, then routing header type + * specific data there are several types of routing header. Type 0 was + * deprecated as per RFC5095 most notable other type is 2, used in + * RFC3775 (MIPv6) here we do not implement MIPv6, so we just need to + * parse the 4 first bytes + */ +struct uip_routing_hdr { + u8_t next; + u8_t len; + u8_t routing_type; + u8_t seg_left; +}; + +/* fragmentation header */ +struct uip_frag_hdr { + u8_t next; + u8_t res; + u16_t offsetresmore; + u32_t id; +}; + +/* + * an option within the destination or hop by hop option headers + * it contains type an length, which is true for all options but PAD1 + */ +struct uip_ext_hdr_opt { + u8_t type; + u8_t len; +}; + +/* PADN option */ +struct uip_ext_hdr_opt_padn { + u8_t opt_type; + u8_t opt_len; +}; + +/* TCP header */ +struct uip_tcp_hdr { + u16_t srcport; + u16_t destport; + u8_t seqno[4]; + u8_t ackno[4]; + u8_t tcpoffset; + u8_t flags; + u8_t wnd[2]; + u16_t tcpchksum; + u8_t urgp[2]; + u8_t optdata[4]; +}; + +/* The ICMP headers. */ +struct uip_icmp_hdr { + u8_t type, icode; + u16_t icmpchksum; +#if !UIP_CONF_IPV6 + u16_t id, seqno; +#endif /* !UIP_CONF_IPV6 */ +}; + + +/* The UDP headers. */ +struct uip_udp_hdr { + u16_t srcport; + u16_t destport; + u16_t udplen; + u16_t udpchksum; +}; + + +/** + * The buffer size available for user data in the \ref uip_buf buffer. + * + * This macro holds the available size for user data in the \ref + * uip_buf buffer. The macro is intended to be used for checking + * bounds of available user data. + * + * Example: + \code + snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i); + \endcode + * + * \hideinitializer + */ +#define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN) +#define UIP_APPDATA_PTR (void *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN] + +#define UIP_PROTO_ICMP 1 +#define UIP_PROTO_TCP 6 +#define UIP_PROTO_UDP 17 +#define UIP_PROTO_ICMP6 58 + + +#if UIP_CONF_IPV6 +/** @{ */ +/** \brief extension headers types */ +#define UIP_PROTO_HBHO 0 +#define UIP_PROTO_DESTO 60 +#define UIP_PROTO_ROUTING 43 +#define UIP_PROTO_FRAG 44 +#define UIP_PROTO_NONE 59 +/** @} */ + +/** @{ */ +/** \brief Destination and Hop By Hop extension headers option types */ +#define UIP_EXT_HDR_OPT_PAD1 0 +#define UIP_EXT_HDR_OPT_PADN 1 +/** @} */ + +/** @{ */ +/** + * \brief Bitmaps for extension header processing + * + * When processing extension headers, we should record somehow which one we + * see, because you cannot have twice the same header, except for destination + * We store all this in one u8_t bitmap one bit for each header expected. The + * order in the bitmap is the order recommended in RFC2460 + */ +#define UIP_EXT_HDR_BITMAP_HBHO 0x01 +#define UIP_EXT_HDR_BITMAP_DESTO1 0x02 +#define UIP_EXT_HDR_BITMAP_ROUTING 0x04 +#define UIP_EXT_HDR_BITMAP_FRAG 0x08 +#define UIP_EXT_HDR_BITMAP_AH 0x10 +#define UIP_EXT_HDR_BITMAP_ESP 0x20 +#define UIP_EXT_HDR_BITMAP_DESTO2 0x40 +/** @} */ + + +#endif /* UIP_CONF_IPV6 */ + + +/* Header sizes. */ +#if UIP_CONF_IPV6 +#define UIP_IPH_LEN 40 +#define UIP_FRAGH_LEN 8 +#else /* UIP_CONF_IPV6 */ +#define UIP_IPH_LEN 20 /* Size of IP header */ +#endif /* UIP_CONF_IPV6 */ + +#define UIP_UDPH_LEN 8 /* Size of UDP header */ +#define UIP_TCPH_LEN 20 /* Size of TCP header */ +#ifdef UIP_IPH_LEN +#define UIP_ICMPH_LEN 4 /* Size of ICMP header */ +#endif +#define UIP_IPUDPH_LEN (UIP_UDPH_LEN + UIP_IPH_LEN) /* Size of IP + + * UDP + * header */ +#define UIP_IPTCPH_LEN (UIP_TCPH_LEN + UIP_IPH_LEN) /* Size of IP + + * TCP + * header */ +#define UIP_TCPIP_HLEN UIP_IPTCPH_LEN +#define UIP_IPICMPH_LEN (UIP_IPH_LEN + UIP_ICMPH_LEN) /* size of ICMP + + IP header */ +#define UIP_LLIPH_LEN (UIP_LLH_LEN + UIP_IPH_LEN) /* size of L2 + + IP header */ +#if UIP_CONF_IPV6 +/** + * The sums below are quite used in ND. When used for uip_buf, we + * include link layer length when used for uip_len, we do not, hence + * we need values with and without LLH_LEN we do not use capital + * letters as these values are variable + */ +#define uip_l2_l3_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len) +#define uip_l2_l3_icmp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN) +#define uip_l3_hdr_len (UIP_IPH_LEN + uip_ext_len) +#define uip_l3_icmp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN) +#endif /*UIP_CONF_IPV6*/ + + +#if UIP_FIXEDADDR +extern const uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr; +#else /* UIP_FIXEDADDR */ +extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr; +#endif /* UIP_FIXEDADDR */ +extern const uip_ipaddr_t uip_broadcast_addr; +extern const uip_ipaddr_t uip_all_zeroes_addr; + +#if UIP_FIXEDETHADDR +extern const uip_lladdr_t uip_lladdr; +#else +extern uip_lladdr_t uip_lladdr; +#endif + + + + +#ifdef UIP_CONF_IPV6 +/** + * \brief Is IPv6 address a the unspecified address + * a is of type uip_ipaddr_t + */ +#define uip_is_addr_unspecified(a) \ + ((((a)->u16[0]) == 0) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u16[7]) == 0)) + +/** \brief Is IPv6 address a the link local all-nodes multicast address */ +#define uip_is_addr_linklocal_allnodes_mcast(a) \ + ((((a)->u8[0]) == 0xff) && \ + (((a)->u8[1]) == 0x02) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 0x01)) + +/** \brief set IP address a to unspecified */ +#define uip_create_unspecified(a) uip_ip6addr(a, 0, 0, 0, 0, 0, 0, 0, 0) + +/** \brief set IP address a to the link local all-nodes multicast address */ +#define uip_create_linklocal_allnodes_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0001) + +/** \brief set IP address a to the link local all-routers multicast address */ +#define uip_create_linklocal_allrouters_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0002) + +/** + * \brief is addr (a) a solicited node multicast address, see RFC3513 + * a is of type uip_ipaddr_t* + */ +#define uip_is_addr_solicited_node(a) \ + ((((a)->u8[0]) == 0xFF) && \ + (((a)->u8[1]) == 0x02) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 1) && \ + (((a)->u8[12]) == 0xFF)) + +/** + * \briefput in b the solicited node address corresponding to address a + * both a and b are of type uip_ipaddr_t* + * */ +#define uip_create_solicited_node(a, b) \ + (((b)->u8[0]) = 0xFF); \ + (((b)->u8[1]) = 0x02); \ + (((b)->u16[1]) = 0); \ + (((b)->u16[2]) = 0); \ + (((b)->u16[3]) = 0); \ + (((b)->u16[4]) = 0); \ + (((b)->u8[10]) = 0); \ + (((b)->u8[11]) = 0x01); \ + (((b)->u8[12]) = 0xFF); \ + (((b)->u8[13]) = ((a)->u8[13])); \ + (((b)->u16[7]) = ((a)->u16[7])) + +/** + * \brief is addr (a) a link local unicast address, see RFC3513 + * i.e. is (a) on prefix FE80::/10 + * a is of type uip_ipaddr_t* + */ +#define uip_is_addr_link_local(a) \ + ((((a)->u8[0]) == 0xFE) && \ + (((a)->u8[1]) == 0x80)) + +/** + * \brief was addr (a) forged based on the mac address m + * a type is uip_ipaddr_t + * m type is uiplladdr_t + */ +#if UIP_CONF_LL_802154 +#define uip_is_addr_mac_addr_based(a, m) \ + ((((a)->u8[8]) == (((m)->addr[0]) ^ 0x02)) && \ + (((a)->u8[9]) == (m)->addr[1]) && \ + (((a)->u8[10]) == (m)->addr[2]) && \ + (((a)->u8[11]) == (m)->addr[3]) && \ + (((a)->u8[12]) == (m)->addr[4]) && \ + (((a)->u8[13]) == (m)->addr[5]) && \ + (((a)->u8[14]) == (m)->addr[6]) && \ + (((a)->u8[15]) == (m)->addr[7])) +#else + +#define uip_is_addr_mac_addr_based(a, m) \ + ((((a)->u8[8]) == (((m)->addr[0]) | 0x02)) && \ + (((a)->u8[9]) == (m)->addr[1]) && \ + (((a)->u8[10]) == (m)->addr[2]) && \ + (((a)->u8[11]) == 0xff) && \ + (((a)->u8[12]) == 0xfe) && \ + (((a)->u8[13]) == (m)->addr[3]) && \ + (((a)->u8[14]) == (m)->addr[4]) && \ + (((a)->u8[15]) == (m)->addr[5])) + +#endif /*UIP_CONF_LL_802154*/ + +/** + * \brief is address a multicast address, see RFC 3513 + * a is of type uip_ipaddr_t* + * */ +#define uip_is_addr_mcast(a) \ + (((a)->u8[0]) == 0xFF) + +/** + * \brief is group-id of multicast address a + * the all nodes group-id + */ +#define uip_is_mcast_group_id_all_nodes(a) \ + ((((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 1)) + +/** + * \brief is group-id of multicast address a + * the all routers group-id + */ +#define uip_is_mcast_group_id_all_routers(a) \ + ((((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 2)) + + +#endif /*UIP_CONF_IPV6*/ + +/** + * Calculate the Internet checksum over a buffer. + * + * The Internet checksum is the one's complement of the one's + * complement sum of all 16-bit words in the buffer. + * + * See RFC1071. + * + * \param buf A pointer to the buffer over which the checksum is to be + * computed. + * + * \param len The length of the buffer over which the checksum is to + * be computed. + * + * \return The Internet checksum of the buffer. + */ +u16_t uip_chksum(u16_t *buf, u16_t len); + +/** + * Calculate the IP header checksum of the packet header in uip_buf. + * + * The IP header checksum is the Internet checksum of the 20 bytes of + * the IP header. + * + * \return The IP header checksum of the IP header in the uip_buf + * buffer. + */ +u16_t uip_ipchksum(void); + +/** + * Calculate the TCP checksum of the packet in uip_buf and uip_appdata. + * + * The TCP checksum is the Internet checksum of data contents of the + * TCP segment, and a pseudo-header as defined in RFC793. + * + * \return The TCP checksum of the TCP segment in uip_buf and pointed + * to by uip_appdata. + */ +u16_t uip_tcpchksum(void); + +/** + * Calculate the UDP checksum of the packet in uip_buf and uip_appdata. + * + * The UDP checksum is the Internet checksum of data contents of the + * UDP segment, and a pseudo-header as defined in RFC768. + * + * \return The UDP checksum of the UDP segment in uip_buf and pointed + * to by uip_appdata. + */ +u16_t uip_udpchksum(void); + +/** + * Calculate the ICMP checksum of the packet in uip_buf. + * + * \return The ICMP checksum of the ICMP packet in uip_buf + */ +u16_t uip_icmp6chksum(void); + + +#endif /* __UIP_H__ */ + + +/** @} */ + |