| |
| /** |
| * \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 1.35 2010/10/19 18:29:04 adamdunkels Exp $ |
| * |
| */ |
| |
| #ifndef __UIP_H__ |
| #define __UIP_H__ |
| |
| #include "net/uipopt.h" |
| |
| /** |
| * Representation of an IP address. |
| * |
| */ |
| typedef union uip_ip4addr_t { |
| uint8_t u8[4]; /* Initializer, must come first!!! */ |
| uint16_t u16[2]; |
| } uip_ip4addr_t; |
| typedef uip_ip4addr_t uip_ipaddr_t; |
| |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| /** \brief 16 bit 802.15.4 address */ |
| typedef struct uip_802154_shortaddr { |
| uint8_t addr[2]; |
| } uip_802154_shortaddr; |
| /** \brief 64 bit 802.15.4 address */ |
| typedef struct uip_802154_longaddr { |
| uint8_t addr[8]; |
| } uip_802154_longaddr; |
| |
| /** \brief 802.11 address */ |
| typedef struct uip_80211_addr { |
| uint8_t addr[6]; |
| } uip_80211_addr; |
| |
| /** \brief 802.3 address */ |
| typedef struct uip_eth_addr { |
| uint8_t addr[6]; |
| } uip_eth_addr; |
| |
| |
| #if UIP_CONF_LL_802154 |
| /** \brief 802.15.4 address */ |
| typedef 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 uip_80211_addr uip_lladdr_t; |
| #define UIP_LLADDR_LEN 6 |
| #else /*UIP_CONF_LL_80211*/ |
| /** \brief Ethernet address */ |
| typedef uip_eth_addr uip_lladdr_t; |
| #define UIP_LLADDR_LEN 6 |
| #endif /*UIP_CONF_LL_80211*/ |
| #endif /*UIP_CONF_LL_802154*/ |
| |
| //#include "net/tcpip.h" |
| |
| /*---------------------------------------------------------------------------*/ |
| /* 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 initilize 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(uint16_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 == UIP_HTONS(UIP_ETHTYPE_IP)) { |
| uip_arp_ipin(); |
| uip_input(); |
| if(uip_len > 0) { |
| uip_arp_out(); |
| ethernet_devicedriver_send(); |
| } |
| } else if(BUF->type == UIP_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 conneciton, 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 < CONFIG_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 < CONFIG_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 |
| */ |
| #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) |
| |
| /** |
| * 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 < CONFIG_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 < CONFIG_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) |
| |
| /** \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 |
| */ |
| |
| typedef union { |
| uint32_t u32[(CONFIG_UIP_BUFSIZE + 3) / 4]; |
| uint8_t u8[CONFIG_UIP_BUFSIZE]; |
| } uip_buf_t; |
| |
| extern uip_buf_t uip_aligned_buf; |
| #define uip_buf (uip_aligned_buf.u8) |
| |
| |
| /** @} */ |
| |
| /*---------------------------------------------------------------------------*/ |
| /* 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 UIP_HTONS() or uip_htons() is necessary. |
| * |
| \code |
| uip_listen(UIP_HTONS(80)); |
| \endcode |
| * |
| * \param port A 16-bit port number in network byte order. |
| */ |
| void uip_listen(uint16_t port); |
| |
| /** |
| * Stop listening to the specified port. |
| * |
| * \note Since this function expects the port number in network byte |
| * order, a conversion using UIP_HTONS() or uip_htons() is necessary. |
| * |
| \code |
| uip_unlisten(UIP_HTONS(80)); |
| \endcode |
| * |
| * \param port A 16-bit port number in network byte order. |
| */ |
| void uip_unlisten(uint16_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 in Kconfig. |
| * |
| * \note Since this function requires the port number to be in network |
| * byte order, a conversion using UIP_HTONS() or uip_htons() is necessary. |
| * |
| \code |
| uip_ipaddr_t ipaddr; |
| |
| uip_ipaddr(&ipaddr, 192,168,1,2); |
| uip_connect(&ipaddr, UIP_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, uint16_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 |
| |
| /** |
| * 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, UIP_HTONS(12345)); |
| if(c != NULL) { |
| uip_udp_bind(c, UIP_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, uint16_t rport); |
| |
| /** |
| * Remove 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, UIP_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] = UIP_HTONS(addr0); \ |
| (addr)->u16[1] = UIP_HTONS(addr1); \ |
| (addr)->u16[2] = UIP_HTONS(addr2); \ |
| (addr)->u16[3] = UIP_HTONS(addr3); \ |
| (addr)->u16[4] = UIP_HTONS(addr4); \ |
| (addr)->u16[5] = UIP_HTONS(addr5); \ |
| (addr)->u16[6] = UIP_HTONS(addr6); \ |
| (addr)->u16[7] = UIP_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 from one place to another. |
| * |
| * 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 |
| */ |
| #define uip_ipaddr_copy(dest, src) (*(dest) = *(src)) |
| |
| /** |
| * 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 |
| */ |
| #define uip_ipaddr_cmp(addr1, addr2) ((addr1)->u16[0] == (addr2)->u16[0] && \ |
| (addr1)->u16[1] == (addr2)->u16[1]) |
| |
| /** |
| * 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 |
| */ |
| #define uip_ipaddr_maskcmp(addr1, addr2, mask) \ |
| (((((uint16_t *)(addr1))[0] & ((uint16_t *)(mask))[0]) == \ |
| (((uint16_t *)(addr2))[0] & ((uint16_t *)(mask))[0])) && \ |
| ((((uint16_t *)(addr1))[1] & ((uint16_t *)(mask))[1]) == \ |
| (((uint16_t *)(addr2))[1] & ((uint16_t *)(mask))[1]))) |
| |
| |
| /** |
| * 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 { \ |
| ((uint16_t *)(dest))[0] = ((uint16_t *)(src))[0] & ((uint16_t *)(mask))[0]; \ |
| ((uint16_t *)(dest))[1] = ((uint16_t *)(src))[1] & ((uint16_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; |
| uint8_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; |
| uint8_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; |
| uint8_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; |
| uint8_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 uip_htons() function instead. |
| * |
| * \hideinitializer |
| */ |
| # if UIP_BYTE_ORDER == UIP_BIG_ENDIAN |
| # define UIP_HTONS(n) (n) |
| # define UIP_HTONL(n) (n) |
| # else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ |
| # define UIP_HTONS(n) (uint16_t)((((uint16_t) (n)) << 8) | (((uint16_t) (n)) >> 8)) |
| # define UIP_HTONL(n) (((uint32_t)UIP_HTONS(n) << 16) | UIP_HTONS((uint32_t)(n) >> 16)) |
| # endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ |
| |
| /** |
| * Convert a 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 UIP_HTONS() macro instead. |
| */ |
| uint16_t uip_htons(uint16_t val); |
| #define uip_ntohs uip_htons |
| |
| uint32_t uip_htonl(uint32_t val); |
| #define uip_ntohl uip_htonl |
| |
| /** @} */ |
| |
| /** |
| * 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; |
| |
| |
| /** |
| * \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 uint16_t uip_len; |
| |
| /** |
| * The length of the extension headers |
| */ |
| extern uint8_t uip_ext_len; |
| /** @} */ |
| |
| |
| /** |
| * 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. */ |
| |
| uint16_t lport; /**< The local TCP port, in network byte order. */ |
| uint16_t rport; /**< The local remote TCP port, in network byte |
| order. */ |
| |
| uint8_t rcv_nxt[4]; /**< The sequence number that we expect to |
| receive next. */ |
| uint8_t snd_nxt[4]; /**< The sequence number that was last sent by |
| us. */ |
| uint16_t len; /**< Length of the data that was previously sent. */ |
| uint16_t mss; /**< Current maximum segment size for the |
| connection. */ |
| uint16_t initialmss; /**< Initial maximum segment size for the |
| connection. */ |
| uint8_t sa; /**< Retransmission time-out calculation state |
| variable. */ |
| uint8_t sv; /**< Retransmission time-out calculation state |
| variable. */ |
| uint8_t rto; /**< Retransmission time-out. */ |
| uint8_t tcpstateflags; /**< TCP state and flags. */ |
| uint8_t timer; /**< The retransmission timer. */ |
| uint8_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; |
| /* The array containing all uIP connections. */ |
| extern struct uip_conn uip_conns[CONFIG_UIP_CONNS]; |
| |
| /** |
| * \addtogroup uiparch |
| * @{ |
| */ |
| |
| /** |
| * 4-byte array used for the 32-bit sequence number calculations. |
| */ |
| extern uint8_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. */ |
| uint16_t lport; /**< The local port number in network byte order. */ |
| uint16_t rport; /**< The remote port number in network byte order. */ |
| uint8_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[CONFIG_UIP_UDP_CONNS]; |
| |
| struct uip_fallback_interface { |
| void (*init)(void); |
| void (*output)(void); |
| }; |
| |
| #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. |
| */ |
| extern struct uip_stats uip_stat; |
| #if CONFIG_UIP_STATISTICS |
| #define UIP_STAT(s) (s) |
| #else |
| #define UIP_STAT(s) |
| #endif /* CONFIG_UIP_STATISTICS */ |
| |
| /** |
| * The structure holding the TCP/IP statistics that are gathered if |
| * CONFIG_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 because 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 because 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. */ |
| struct { |
| uip_stats_t recv; /**< Number of recived 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 because too few |
| connections were available. */ |
| uip_stats_t synrst; /**< Number of SYNs for closed ports, |
| triggering a RST. */ |
| } tcp; /**< TCP statistics. */ |
| struct { |
| uip_stats_t drop; /**< Number of dropped UDP segments. */ |
| uip_stats_t recv; /**< Number of recived 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. */ |
| }; |
| |
| |
| /*---------------------------------------------------------------------------*/ |
| /* All the stuff below this point is internal to uIP and should not be |
| * used directly by an application or by a device driver. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| |
| |
| |
| /* uint8_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 uint8_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 uint8_t |
| uip_ext_hdr_options_process(); */ |
| |
| /* uip_process(flag): |
| * |
| * The actual uIP function which does all the work. |
| */ |
| void uip_process(uint8_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. */ |
| #define UIP_UDP_TIMER 5 |
| |
| /* 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 { |
| /* IPv4 header. */ |
| uint8_t vhl, |
| tos, |
| len[2], |
| ipid[2], |
| ipoffset[2], |
| ttl, |
| proto; |
| uint16_t ipchksum; |
| uip_ipaddr_t srcipaddr, destipaddr; |
| |
| /* TCP header. */ |
| uint16_t srcport, |
| destport; |
| uint8_t seqno[4], |
| ackno[4], |
| tcpoffset, |
| flags, |
| wnd[2]; |
| uint16_t tcpchksum; |
| uint8_t urgp[2]; |
| uint8_t optdata[4]; |
| }; |
| |
| /* The ICMP and IP headers. */ |
| struct uip_icmpip_hdr { |
| /* IPv4 header. */ |
| uint8_t vhl, |
| tos, |
| len[2], |
| ipid[2], |
| ipoffset[2], |
| ttl, |
| proto; |
| uint16_t ipchksum; |
| uip_ipaddr_t srcipaddr, destipaddr; |
| |
| /* ICMP header. */ |
| uint8_t type, icode; |
| uint16_t icmpchksum; |
| uint16_t id, seqno; |
| uint8_t payload[1]; |
| }; |
| |
| |
| /* The UDP and IP headers. */ |
| struct uip_udpip_hdr { |
| /* IP header. */ |
| uint8_t vhl, |
| tos, |
| len[2], |
| ipid[2], |
| ipoffset[2], |
| ttl, |
| proto; |
| uint16_t ipchksum; |
| uip_ipaddr_t srcipaddr, destipaddr; |
| |
| /* UDP header. */ |
| uint16_t srcport, |
| destport; |
| uint16_t udplen; |
| uint16_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 { |
| /* IPV4 header */ |
| uint8_t vhl, |
| tos, |
| len[2], |
| ipid[2], |
| ipoffset[2], |
| ttl, |
| proto; |
| uint16_t ipchksum; |
| uip_ipaddr_t srcipaddr, destipaddr; |
| }; |
| |
| |
| /* |
| * 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 */ |
| typedef struct uip_ext_hdr { |
| uint8_t next; |
| uint8_t len; |
| } uip_ext_hdr; |
| |
| /* Hop by Hop option header */ |
| typedef struct uip_hbho_hdr { |
| uint8_t next; |
| uint8_t len; |
| } uip_hbho_hdr; |
| |
| /* destination option header */ |
| typedef struct uip_desto_hdr { |
| uint8_t next; |
| uint8_t len; |
| } uip_desto_hdr; |
| |
| /* 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 |
| */ |
| typedef struct uip_routing_hdr { |
| uint8_t next; |
| uint8_t len; |
| uint8_t routing_type; |
| uint8_t seg_left; |
| } uip_routing_hdr; |
| |
| /* fragmentation header */ |
| typedef struct uip_frag_hdr { |
| uint8_t next; |
| uint8_t res; |
| uint16_t offsetresmore; |
| uint32_t id; |
| } uip_frag_hdr; |
| |
| /* |
| * an option within the destination or hop by hop option headers |
| * it contains type an length, which is true for all options but PAD1 |
| */ |
| typedef struct uip_ext_hdr_opt { |
| uint8_t type; |
| uint8_t len; |
| } uip_ext_hdr_opt; |
| |
| /* PADN option */ |
| typedef struct uip_ext_hdr_opt_padn { |
| uint8_t opt_type; |
| uint8_t opt_len; |
| } uip_ext_hdr_opt_padn; |
| |
| /* TCP header */ |
| struct uip_tcp_hdr { |
| uint16_t srcport; |
| uint16_t destport; |
| uint8_t seqno[4]; |
| uint8_t ackno[4]; |
| uint8_t tcpoffset; |
| uint8_t flags; |
| uint8_t wnd[2]; |
| uint16_t tcpchksum; |
| uint8_t urgp[2]; |
| uint8_t optdata[4]; |
| }; |
| |
| /* The ICMP headers. */ |
| struct uip_icmp_hdr { |
| uint8_t type, icode; |
| uint16_t icmpchksum; |
| uint16_t id, seqno; |
| }; |
| |
| |
| /* The UDP headers. */ |
| struct uip_udp_hdr { |
| uint16_t srcport; |
| uint16_t destport; |
| uint16_t udplen; |
| uint16_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 (CONFIG_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 |
| |
| |
| /* Header sizes. */ |
| #define UIP_IPH_LEN 20 /* Size of IP header */ |
| |
| #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 */ |
| |
| extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr; |
| extern const uip_ipaddr_t uip_broadcast_addr; |
| extern const uip_ipaddr_t uip_all_zeroes_addr; |
| |
| extern uip_lladdr_t uip_lladdr; |
| |
| |
| /** |
| * 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. |
| */ |
| uint16_t uip_chksum(uint16_t *buf, uint16_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. |
| */ |
| uint16_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. |
| */ |
| uint16_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. |
| */ |
| uint16_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 |
| */ |
| uint16_t uip_icmp6chksum(void); |
| |
| |
| #endif /* __UIP_H__ */ |
| |
| |
| /** @} */ |