/****************************************************************************
* uip.h
* Header file for the uIP TCP/IP stack.
*
* 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) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* This logic was leveraged from uIP which also has a BSD-style license:
*
* Author Adam Dunkels <adam@dunkels.com>
* 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.
*
****************************************************************************/
#ifndef __NET_UIP_UIP_H
#define __NET_UIP_UIP_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <nuttx/config.h>
#include <arpa/inet.h>
#include <net/uip/uipopt.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* 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
* mutualy exclusive. Note that these flags should *NOT* be accessed directly,
* but only through the uIP functions/macros.
*/
#define UIP_ACKDATA (1 << 0) /* Signifies that the outstanding data was acked and the
* application should send out new data instead of retransmitting
* the last data. */
#define UIP_NEWDATA (1 << 1) /* Flags the fact that the peer has sent us new data. */
#define UIP_REXMIT (1 << 2) /* Tells the application to retransmit the data that was last
* sent. */
#define UIP_POLL (1 << 3) /* Used for polling the application, to check if the application
* has data that it wants to send. */
#define UIP_CLOSE (1 << 4) /* 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 (1 << 5) /* 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 (1 << 6) /* 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 (1 << 7) /* The connection has been aborted due to too many retransmissions. */
#define UIP_APPTIMEOUT (1 << 8) /* Application time limit has elapsed */
/* The TCP states used in the uip_conn->tcpstateflags. */
#define UIP_CLOSED 0 /* The connection is not in use and available */
#define UIP_ALLOCATED 1 /* The connection is allocated, but not yet initialized */
#define UIP_SYN_RCVD 2
#define UIP_SYN_SENT 3
#define UIP_ESTABLISHED 4
#define UIP_FIN_WAIT_1 5
#define UIP_FIN_WAIT_2 6
#define UIP_CLOSING 7
#define UIP_TIME_WAIT 8
#define UIP_LAST_ACK 9
#define UIP_TS_MASK 15
#define UIP_STOPPED 16
/* 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:
*
* snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i);
*/
#define UIP_APPDATA_SIZE (UIP_BUFSIZE - 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. */
#ifdef CONFIG_NET_IPv6
# define UIP_IPH_LEN 40
#else /* CONFIG_NET_IPv6 */
# define UIP_IPH_LEN 20 /* Size of IP header */
#endif /* CONFIG_NET_IPv6 */
#define UIP_UDPH_LEN 8 /* Size of UDP header */
#define UIP_TCPH_LEN 20 /* Size of TCP header */
#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
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* Repressentation of an IP address. */
typedef uint16 uip_ip4addr_t[2];
typedef uint16 uip_ip6addr_t[8];
#ifdef CONFIG_NET_IPv6
typedef uip_ip6addr_t uip_ipaddr_t;
#else /* CONFIG_NET_IPv6 */
typedef uip_ip4addr_t uip_ipaddr_t;
#endif /* CONFIG_NET_IPv6 */
/* 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 "private: field whos purpose
* is to let the application store application-specific state (e.g.,
* file pointers) for the connection.
*/
struct uip_conn
{
uip_ipaddr_t ripaddr; /* The IP address of the remote host. */
uint16 lport; /* The local TCP port, in network byte order. */
uint16 rport; /* The local remote TCP port, in network byte
order. */
uint8 rcv_nxt[4]; /* The sequence number that we expect to
receive next. */
uint8 snd_nxt[4]; /* The sequence number that was last sent by
us. */
uint16 len; /* Length of the data that was previously sent. */
uint16 mss; /* Current maximum segment size for the
connection. */
uint16 initialmss; /* Initial maximum segment size for the
connection. */
uint8 sa; /* Retransmission time-out calculation state
variable. */
uint8 sv; /* Retransmission time-out calculation state
variable. */
uint8 rto; /* Retransmission time-out. */
uint8 tcpstateflags; /* TCP state and flags. */
uint8 timer; /* The retransmission timer. */
uint8 nrtx; /* The number of retransmissions for the last
segment sent. */
/* Higher level logic can retain application specific information
* in the following:
*/
void *private;
};
#ifdef CONFIG_NET_UDP
/* Representation of a uIP UDP connection. */
struct uip_udp_conn
{
uip_ipaddr_t ripaddr; /* The IP address of the remote peer. */
uint16 lport; /* The local port number in network byte order. */
uint16 rport; /* The remote port number in network byte order. */
uint8 ttl; /* Default time-to-live. */
/* Higher level logic can retain application specific information
* in the following:
*/
void *private;
};
#endif /* CONFIG_NET_UDP */
/* The structure holding the TCP/IP statistics that are gathered if
* UIP_STATISTICS is set to 1.
*/
struct uip_stats
{
struct
{
uip_stats_t drop; /* Number of dropped packets at the IP layer. */
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 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 drop; /* Number of dropped ICMP packets. */
uip_stats_t recv; /* Number of received ICMP packets. */
uip_stats_t sent; /* Number of sent ICMP packets. */
uip_stats_t typeerr; /* Number of ICMP packets with a wrong type. */
} icmp; /* ICMP statistics. */
struct
{
uip_stats_t drop; /* Number of dropped TCP segments. */
uip_stats_t recv; /* Number of recived TCP segments. */
uip_stats_t sent; /* Number of sent 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 recevied 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 avaliable. */
uip_stats_t synrst; /* Number of SYNs for closed ports,
triggering a RST. */
} tcp; /* TCP statistics. */
#ifdef CONFIG_NET_UDP
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. */
#endif /* CONFIG_NET_UDP */
};
/* The TCP and IP headers. */
struct uip_tcpip_hdr
{
#ifdef CONFIG_NET_IPv6
/* IPv6 header. */
uint8 vtc;
uint8 tcflow;
uint16 flow;
uint8 len[2];
uint8 proto, ttl;
uip_ip6addr_t srcipaddr, destipaddr;
#else /* CONFIG_NET_IPv6 */
/* IPv4 header. */
uint8 vhl;
uint8 tos;
uint8 len[2];
uint8 ipid[2];
uint8 ipoffset[2];
uint8 ttl;
uint8 proto;
uint16 ipchksum;
uint16 srcipaddr[2];
uint16 destipaddr[2];
#endif /* CONFIG_NET_IPv6 */
/* TCP header. */
uint16 srcport;
uint16 destport;
uint8 seqno[4];
uint8 ackno[4];
uint8 tcpoffset;
uint8 flags;
uint8 wnd[2];
uint16 tcpchksum;
uint8 urgp[2];
uint8 optdata[4];
};
/* The ICMP and IP headers. */
struct uip_icmpip_hdr
{
#ifdef CONFIG_NET_IPv6
/* IPv6 header. */
uint8 vtc;
uint8 tcf;
uint16 flow;
uint8 len[2];
uint8 proto;
uint8 ttl;
uip_ip6addr_t srcipaddr;
uip_ip6addr_t destipaddr;
#else /* CONFIG_NET_IPv6 */
/* IPv4 header. */
uint8 vhl;
uint8 tos;
uint8 len[2];
uint8 ipid[2];
uint8 ipoffset[2];
uint8 ttl;
uint8 proto;
uint16 ipchksum;
uint16 srcipaddr[2];
uint16 destipaddr[2];
#endif /* CONFIG_NET_IPv6 */
/* ICMP (echo) header. */
uint8 type, icode;
uint16 icmpchksum;
#ifndef CONFIG_NET_IPv6
uint16 id, seqno;
#else /* !CONFIG_NET_IPv6 */
uint8 flags, reserved1, reserved2, reserved3;
uint8 icmp6data[16];
uint8 options[1];
#endif /* !CONFIG_NET_IPv6 */
};
/* The UDP and IP headers. */
struct uip_udpip_hdr
{
#ifdef CONFIG_NET_IPv6
/* IPv6 header. */
uint8 vtc;
uint8 tcf;
uint16 flow;
uint8 len[2];
uint8 proto, ttl;
uip_ip6addr_t srcipaddr;
uip_ip6addr_t destipaddr;
#else /* CONFIG_NET_IPv6 */
/* IP header. */
uint8 vhl;
uint8 tos;
uint8 len[2];
uint8 ipid[2];
uint8 ipoffset[2];
uint8 ttl;
uint8 proto;
uint16 ipchksum;
uint16 srcipaddr[2];
uint16 destipaddr[2];
#endif /* CONFIG_NET_IPv6 */
/* UDP header. */
uint16 srcport;
uint16 destport;
uint16 udplen;
uint16 udpchksum;
};
/* Representation of a 48-bit Ethernet address. */
struct uip_eth_addr
{
uint8 addr[6];
};
/****************************************************************************
* Public Data
****************************************************************************/
/* 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:
*
* 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);
* }
* }
*/
extern uint8 uip_buf[UIP_BUFSIZE+2];
/* 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
/* uint8 *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 */
/* 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 uip_len;
#if UIP_URGDATA > 0
extern uint16 uip_urglen, uip_surglen;
#endif /* UIP_URGDATA > 0 */
/* 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;
/* 4-byte array used for the 32-bit sequence number calculations.*/
extern uint8 uip_acc32[4];
/* The current UDP connection. */
#ifdef CONFIG_NET_UDP
extern struct uip_udp_conn *uip_udp_conn;
extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
#endif /* CONFIG_NET_UDP */
/* The uIP TCP/IP statistics.
*
* This is the variable in which the uIP TCP/IP statistics are gathered.
*/
extern struct uip_stats uip_stat;
/* uint16 uip_flags:
*
* When the application is called, uip_flags will contain the flags
* that are defined in this file. Please read below for more
* infomation.
*/
extern uint16 uip_flags;
#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 */
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* 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:
*
* uip_ipaddr_t addr;
*
* uip_ipaddr(&addr, 192,168,1,2);
* uip_sethostaddr(&addr);
*
* addr A pointer to an IP address of type uip_ipaddr_t;
*/
#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:
*
* uip_ipaddr_t hostaddr;
*
* uip_gethostaddr(&hostaddr);
*
* addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the currently configured IP address.
*/
#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), uip_hostaddr)
/* Set the default router's IP address.
*
* addr A pointer to a uip_ipaddr_t variable containing the IP
* address of the default router.
*/
#define uip_setdraddr(addr) uip_ipaddr_copy(uip_draddr, (addr))
/* Set the netmask.
*
* addr A pointer to a uip_ipaddr_t variable containing the IP
* address of the netmask.
*/
#define uip_setnetmask(addr) uip_ipaddr_copy(uip_netmask, (addr))
/* Get the default router's IP address.
*
* addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the IP address of the default router.
*/
#define uip_getdraddr(addr) uip_ipaddr_copy((addr), uip_draddr)
/* Get the netmask.
*
* addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the value of the netmask.
*/
#define uip_getnetmask(addr) uip_ipaddr_copy((addr), uip_netmask)
/* uIP initialization functions
*
* The uIP initialization functions are used for booting uIP.
*
* This function should be called at boot up to initilize the uIP
* TCP/IP stack.
*/
void uip_init(void);
/* This function may be used at boot time to set the initial ip_id.*/
void uip_setipid(uint16 id);
/* uIP application functions
*
* Functions used by an application running of top of uIP. This includes
* functions for opening and closing connections, sending and receiving
* data, etc.
*
* The following function must be provided by the application logic. It
* is called from the UIP interrupt handler when interesting events are
* detected that may be of interest to the application.
*/
extern void uip_interrupt_event(void);
#ifdef CONFIG_NET_UDP
extern void uip_interrupt_udp_event(void);
#endif
/* Find a free connection structure and allocate it for use. This is
* normally something done by the implementation of the socket() API
*/
extern struct uip_conn *uip_tcpalloc(void);
#ifdef CONFIG_NET_UDP
extern struct uip_udp_conn *uip_udpalloc(void);
#endif
/* Free a connection structure that is no longer in use. This should
* be done by the implementation of close()
*/
extern void uip_tcpfree(struct uip_conn *conn);
#ifdef CONFIG_NET_UDP
extern void uip_udpfree(struct uip_udp_conn *conn);
#endif
/* 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.
*
* port A 16-bit port number in network byte order.
*/
void uip_listen(uint16 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.
*
* port A 16-bit port number in network byte order.
*/
void uip_unlisten(uint16 port);
/* Check if a connection has outstanding (i.e., unacknowledged) data.
*
* conn A pointer to the uip_conn structure for the connection.
*/
#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
* funcion 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.
*
* data A pointer to the data which is to be sent.
*
* len The maximum amount of data bytes to be sent.
*/
void uip_send(const void *data, int len);
/* The length of any incoming data that is currently avaliable (if avaliable)
* in the uip_appdata buffer.
*
* The test function uip_data() must first be used to check if there
* is any data available at all.
*/
#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.
*/
#define uip_urgdatalen() uip_urglen
/* Close the current connection.
*
* This function will close the current connection in a nice way.
*/
#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 occured that prevents using the
* uip_close() function.
*/
#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.
*/
#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
/* Find out if the current connection has been previously stopped with
* uip_stop().
*/
#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.
*/
#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.
*/
#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
* avaliable through the uip_len variable.
*/
#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.
*/
#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()).
*/
#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.
*/
#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.
*/
#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.
*/
#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.
*/
#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.
*/
#define uip_poll() (uip_flags & UIP_POLL)
/* Get the initial maxium segment size (MSS) of the current
* connection.
*/
#define uip_initialmss() (uip_conn->initialmss)
/* Get the current maxium segment size that can be sent on the current
* connection.
*
* The current maxiumum 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()).
*/
#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:
*
* 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));
* }
*
* ripaddr The IP address of the remote host.
*
* 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(uip_ipaddr_t *ripaddr, uint16 rport);
/* Removed a UDP connection.
*
* conn A pointer to the uip_udp_conn structure for the connection.
*/
#define uip_udp_remove(conn) (conn)->lport = 0
/* Bind a UDP connection to a local port.
*
* conn A pointer to the uip_udp_conn structure for the
* connection.
*
* port The local port number, in network byte order.
*/
#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.
*
* len The length of the data in the uip_buf buffer.
*/
#define uip_udp_send(len) uip_send((char *)uip_appdata, len)
/* uIP convenience and converting functions.
*
* These functions can be used for converting between different data
* formats used by uIP.
*
* 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:
*
* uip_ipaddr_t ipaddr;
* struct uip_conn *c;
*
* uip_ipaddr(&ipaddr, 192,168,1,2);
* c = uip_connect(&ipaddr, HTONS(80));
*
* addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the IP address.
*
* addr0 The first octet of the IP address.
* addr1 The second octet of the IP address.
* addr2 The third octet of the IP address.
* addr3 The forth octet of the IP address.
*/
#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
((uint16 *)(addr))[0] = HTONS(((addr0) << 8) | (addr1)); \
((uint16 *)(addr))[1] = HTONS(((addr2) << 8) | (addr3)); \
} while(0)
/* Construct an IPv6 address from eight 16-bit words.
*
* This function constructs an IPv6 address.
*/
#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \
((uint16 *)(addr))[0] = HTONS((addr0)); \
((uint16 *)(addr))[1] = HTONS((addr1)); \
((uint16 *)(addr))[2] = HTONS((addr2)); \
((uint16 *)(addr))[3] = HTONS((addr3)); \
((uint16 *)(addr))[4] = HTONS((addr4)); \
((uint16 *)(addr))[5] = HTONS((addr5)); \
((uint16 *)(addr))[6] = HTONS((addr6)); \
((uint16 *)(addr))[7] = HTONS((addr7)); \
} while(0)
/* Copy an IP address to another IP address.
*
* Copies an IP address from one place to another.
*
* Example:
*
* uip_ipaddr_t ipaddr1, ipaddr2;
*
* uip_ipaddr(&ipaddr1, 192,16,1,2);
* uip_ipaddr_copy(&ipaddr2, &ipaddr1);
*
* dest The destination for the copy.
* src The source from where to copy.
*/
#ifndef CONFIG_NET_IPv6
#define uip_ipaddr_copy(dest, src) do { \
((uint16 *)dest)[0] = ((uint16 *)src)[0]; \
((uint16 *)dest)[1] = ((uint16 *)src)[1]; \
} while(0)
#else /* !CONFIG_NET_IPv6 */
#define uip_ipaddr_copy(dest, src) memcpy(dest, src, sizeof(uip_ip6addr_t))
#endif /* !CONFIG_NET_IPv6 */
/* Compare two IP addresses
*
* Example:
*
* uip_ipaddr_t ipaddr1, ipaddr2;
*
* uip_ipaddr(&ipaddr1, 192,16,1,2);
* if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) {
* printf("They are the same");
* }
*
* addr1 The first IP address.
* addr2 The second IP address.
*/
#ifndef CONFIG_NET_IPv6
#define uip_ipaddr_cmp(addr1, addr2) (((uint16 *)addr1)[0] == ((uint16 *)addr2)[0] && \
((uint16 *)addr1)[1] == ((uint16 *)addr2)[1])
#else /* !CONFIG_NET_IPv6 */
#define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0)
#endif /* !CONFIG_NET_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:
*
* 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");
* }
*
* addr1 The first IP address.
* addr2 The second IP address.
* mask The netmask.
*/
#define uip_ipaddr_maskcmp(addr1, addr2, mask) \
(((((uint16 *)addr1)[0] & ((uint16 *)mask)[0]) == \
(((uint16 *)addr2)[0] & ((uint16 *)mask)[0])) && \
((((uint16 *)addr1)[1] & ((uint16 *)mask)[1]) == \
(((uint16 *)addr2)[1] & ((uint16 *)mask)[1])))
/**
* 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:
*
* 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);
*
* In the example above, the variable "ipaddr2" will contain the IP
* address 192.168.1.0.
*
* dest Where the result is to be placed.
* src The IP address.
* mask The netmask.
*/
#define uip_ipaddr_mask(dest, src, mask) do { \
((uint16 *)dest)[0] = ((uint16 *)src)[0] & ((uint16 *)mask)[0]; \
((uint16 *)dest)[1] = ((uint16 *)src)[1] & ((uint16 *)mask)[1]; \
} while(0)
/* Pick the first octet of an IP address.
*
* Picks out the first octet of an IP address.
*
* Example:
*
* uip_ipaddr_t ipaddr;
* uint8 octet;
*
* uip_ipaddr(&ipaddr, 1,2,3,4);
* octet = uip_ipaddr1(&ipaddr);
*
* In the example above, the variable "octet" will contain the value 1.
*/
#define uip_ipaddr1(addr) (htons(((uint16 *)(addr))[0]) >> 8)
/* Pick the second octet of an IP address.
*
* Picks out the second octet of an IP address.
*
* Example:
*
* uip_ipaddr_t ipaddr;
* uint8 octet;
*
* uip_ipaddr(&ipaddr, 1,2,3,4);
* octet = uip_ipaddr2(&ipaddr);
*
* In the example above, the variable "octet" will contain the value 2.
*/
#define uip_ipaddr2(addr) (htons(((uint16 *)(addr))[0]) & 0xff)
/* Pick the third octet of an IP address.
*
* Picks out the third octet of an IP address.
*
* Example:
*
* uip_ipaddr_t ipaddr;
* uint8 octet;
*
* uip_ipaddr(&ipaddr, 1,2,3,4);
* octet = uip_ipaddr3(&ipaddr);
*
* In the example above, the variable "octet" will contain the value 3.
*/
#define uip_ipaddr3(addr) (htons(((uint16 *)(addr))[1]) >> 8)
/* Pick the fourth octet of an IP address.
*
* Picks out the fourth octet of an IP address.
*
* Example:
*
* uip_ipaddr_t ipaddr;
* uint8 octet;
*
* uip_ipaddr(&ipaddr, 1,2,3,4);
* octet = uip_ipaddr4(&ipaddr);
*
* In the example above, the variable "octet" will contain the value 4.
*/
#define uip_ipaddr4(addr) (htons(((uint16 *)(addr))[1]) & 0xff)
/* This function is called user code to set up the wait */
#define uip_event_wait(waitflags) uip_event_timedwait(waitflags,0)
extern int uip_event_timedwait(uint16 waitflags, int timeout);
/* This function is called from uip_interrupt() to wake up any
* waiting threads/tasks.
*/
extern void uip_event_signal(void);
#endif /* __NET_UIP_UIP_H */
