contiki/core/net/ip/tcpip.h

379 lines
11 KiB
C

/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
* 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/**
* \file
* Header for the Contiki/uIP interface.
* \author Adam Dunkels <adam@sics.se>
* \author Mathilde Durvy <mdurvy@cisco.com> (IPv6 related code)
* \author Julien Abeille <jabeille@cisco.com> (IPv6 related code)
*/
/**
* \addtogroup uip
* @{
*/
/**
* \defgroup tcpip The Contiki/uIP interface
* @{
*
* TCP/IP support in Contiki is implemented using the uIP TCP/IP
* stack. For sending and receiving data, Contiki uses the functions
* provided by the uIP module, but Contiki adds a set of functions for
* connection management. The connection management functions make
* sure that the uIP TCP/IP connections are connected to the correct
* process.
*
* Contiki also includes an optional protosocket library that provides
* an API similar to the BSD socket API.
*
* \sa \ref uip "The uIP TCP/IP stack"
* \sa \ref psock "Protosockets library"
*
*/
#ifndef TCPIP_H_
#define TCPIP_H_
#include "contiki.h"
struct uip_conn;
struct tcpip_uipstate {
struct process *p;
void *state;
};
#define UIP_APPCALL tcpip_uipcall
#define UIP_UDP_APPCALL tcpip_uipcall
#define UIP_ICMP6_APPCALL tcpip_icmp6_call
/*#define UIP_APPSTATE_SIZE sizeof(struct tcpip_uipstate)*/
typedef struct tcpip_uipstate uip_udp_appstate_t;
typedef struct tcpip_uipstate uip_tcp_appstate_t;
typedef struct tcpip_uipstate uip_icmp6_appstate_t;
#include "net/ip/uip.h"
void tcpip_uipcall(void);
/**
* \name TCP functions
* @{
*/
/**
* Attach a TCP connection to the current process
*
* This function attaches the current process to a TCP
* connection. Each TCP connection must be attached to a process in
* order for the process to be able to receive and send
* data. Additionally, this function can add a pointer with connection
* state to the connection.
*
* \param conn A pointer to the TCP connection.
*
* \param appstate An opaque pointer that will be passed to the
* process whenever an event occurs on the connection.
*
*/
CCIF void tcp_attach(struct uip_conn *conn,
void *appstate);
#define tcp_markconn(conn, appstate) tcp_attach(conn, appstate)
/**
* Open a TCP port.
*
* This function opens a TCP port for listening. When a TCP connection
* request occurs for the port, the process will be sent a tcpip_event
* with the new connection request.
*
* \note Port numbers must always be given in network byte order. The
* functions UIP_HTONS() and uip_htons() can be used to convert port numbers
* from host byte order to network byte order.
*
* \param port The port number in network byte order.
*
*/
CCIF void tcp_listen(uint16_t port);
/**
* Close a listening TCP port.
*
* This function closes a listening TCP port.
*
* \note Port numbers must always be given in network byte order. The
* functions UIP_HTONS() and uip_htons() can be used to convert port numbers
* from host byte order to network byte order.
*
* \param port The port number in network byte order.
*
*/
CCIF void tcp_unlisten(uint16_t port);
/**
* Open a TCP connection to the specified IP address and port.
*
* This function opens a TCP connection to the specified port at the
* host specified with an IP address. Additionally, an opaque pointer
* can be attached to the connection. This pointer will be sent
* together with uIP events to the process.
*
* \note The port number must be provided in network byte order so a
* conversion with UIP_HTONS() usually is necessary.
*
* \note This function will only create the connection. The connection
* is not opened directly. uIP will try to open the connection the
* next time the uIP stack is scheduled by Contiki.
*
* \param ripaddr Pointer to the IP address of the remote host.
* \param port Port number in network byte order.
* \param appstate Pointer to application defined data.
*
* \return A pointer to the newly created connection, or NULL if
* memory could not be allocated for the connection.
*
*/
CCIF struct uip_conn *tcp_connect(const uip_ipaddr_t *ripaddr, uint16_t port,
void *appstate);
/**
* Cause a specified TCP connection to be polled.
*
* This function causes uIP to poll the specified TCP connection. The
* function is used when the application has data that is to be sent
* immediately and do not wish to wait for the periodic uIP polling
* mechanism.
*
* \param conn A pointer to the TCP connection that should be polled.
*
*/
void tcpip_poll_tcp(struct uip_conn *conn);
/** @} */
/**
* \name UDP functions
* @{
*/
struct uip_udp_conn;
/**
* Attach the current process to a UDP connection
*
* This function attaches the current process to a UDP
* connection. Each UDP connection must have a process attached to it
* in order for the process to be able to receive and send data over
* the connection. Additionally, this function can add a pointer with
* connection state to the connection.
*
* \param conn A pointer to the UDP connection.
*
* \param appstate An opaque pointer that will be passed to the
* process whenever an event occurs on the connection.
*
*/
void udp_attach(struct uip_udp_conn *conn,
void *appstate);
#define udp_markconn(conn, appstate) udp_attach(conn, appstate)
/**
* Create a new UDP connection.
*
* This function creates a new UDP connection with the specified
* remote endpoint.
*
* \note The port number must be provided in network byte order so a
* conversion with UIP_HTONS() usually is necessary.
*
* \sa udp_bind()
*
* \param ripaddr Pointer to the IP address of the remote host.
* \param port Port number in network byte order.
* \param appstate Pointer to application defined data.
*
* \return A pointer to the newly created connection, or NULL if
* memory could not be allocated for the connection.
*/
CCIF struct uip_udp_conn *udp_new(const uip_ipaddr_t *ripaddr, uint16_t port,
void *appstate);
/**
* Create a new UDP broadcast connection.
*
* This function creates a new (link-local) broadcast UDP connection
* to a specified port.
*
* \param port Port number in network byte order.
* \param appstate Pointer to application defined data.
*
* \return A pointer to the newly created connection, or NULL if
* memory could not be allocated for the connection.
*/
struct uip_udp_conn *udp_broadcast_new(uint16_t port, void *appstate);
/**
* Bind a UDP connection to a local port.
*
* This function binds a UDP connection to a specified local port.
*
* When a connection is created with udp_new(), it gets a local port
* number assigned automatically. If the application needs to bind the
* connection to a specified local port, this function should be used.
*
* \note The port number must be provided in network byte order so a
* conversion with UIP_HTONS() usually is necessary.
*
* \param conn A pointer to the UDP connection that is to be bound.
* \param port The port number in network byte order to which to bind
* the connection.
*/
#define udp_bind(conn, port) uip_udp_bind(conn, port)
/**
* Cause a specified UDP connection to be polled.
*
* This function causes uIP to poll the specified UDP connection. The
* function is used when the application has data that is to be sent
* immediately and do not wish to wait for the periodic uIP polling
* mechanism.
*
* \param conn A pointer to the UDP connection that should be polled.
*
*/
CCIF void tcpip_poll_udp(struct uip_udp_conn *conn);
/** @} */
/**
* \name ICMPv6 functions
* @{
*/
#if UIP_CONF_ICMP6
/**
* The ICMP6 event.
*
* This event is posted to a process whenever a uIP ICMP event has occurred.
*/
CCIF extern process_event_t tcpip_icmp6_event;
/**
* \brief register an ICMPv6 callback
* \return 0 if success, 1 if failure (one application already registered)
*
* This function just registers a process to be polled when
* an ICMPv6 message is received.
* If no application registers, some ICMPv6 packets will be
* processed by the "kernel" as usual (NS, NA, RS, RA, Echo request),
* others will be dropped.
* If an application registers here, it will be polled with a
* process_post_synch every time an ICMPv6 packet is received.
*/
uint8_t icmp6_new(void *appstate);
/**
* This function is called at reception of an ICMPv6 packet
* If an application registered as an ICMPv6 listener (with
* icmp6_new), it will be called through a process_post_synch()
*/
void tcpip_icmp6_call(uint8_t type);
#endif /*UIP_CONF_ICMP6*/
/** @} */
/**
* The uIP event.
*
* This event is posted to a process whenever a uIP event has occurred.
*/
CCIF extern process_event_t tcpip_event;
/**
* \name TCP/IP packet processing
* @{
*/
/**
* \brief Deliver an incoming packet to the TCP/IP stack
*
* This function is called by network device drivers to
* deliver an incoming packet to the TCP/IP stack. The
* incoming packet must be present in the uip_buf buffer,
* and the length of the packet must be in the global
* uip_len variable.
*/
CCIF void tcpip_input(void);
/**
* \brief Output packet to layer 2
* The eventual parameter is the MAC address of the destination.
*/
#if NETSTACK_CONF_WITH_IPV6
uint8_t tcpip_output(const uip_lladdr_t *);
void tcpip_set_outputfunc(uint8_t (* f)(const uip_lladdr_t *));
#else
uint8_t tcpip_output(void);
void tcpip_set_outputfunc(uint8_t (* f)(void));
#endif
/**
* \brief This function does address resolution and then calls tcpip_output
*/
#if NETSTACK_CONF_WITH_IPV6
void tcpip_ipv6_output(void);
#endif
/**
* \brief Is forwarding generally enabled?
*/
extern unsigned char tcpip_do_forwarding;
/*
* Are we at the moment forwarding the contents of uip_buf[]?
*/
extern unsigned char tcpip_is_forwarding;
#define tcpip_set_forwarding(forwarding) tcpip_do_forwarding = (forwarding)
/** @} */
PROCESS_NAME(tcpip_process);
#endif /* TCPIP_H_ */
/** @} */
/** @} */