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nuttx/include/net/uip/uip.h
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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@397 42af7a65-404d-4744-a932-0658087f49c3
2007-11-22 14:42:52 +00:00

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/****************************************************************************
* 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 <nuttx/config.h>
#include <sys/types.h>
#include <queue.h>
#include <arpa/inet.h>
#include <net/uip/uipopt.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* The following flags may be set in the set of flags before calling the
* application callback. The UIP_ACKDATA, UIP_NEWDATA, and UIP_CLOSE flags
* may be set at the same time, whereas the others are mutualy exclusive.
*/
#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_DATA_EVENTS (UIP_ACKDATA|UIP_NEWDATA|UIP_REXMIT|UIP_POLL)
#define UIP_CONN_EVENTS (UIP_CLOSE|UIP_ABORT|UIP_CONNECTED|UIP_TIMEDOUT)
/* The TCP states used in the struct uip_conn tcpstateflags field */
#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 d_buf buffer.
*
* This macro holds the available size for user data in the
* d_buf buffer. The macro is intended to be used for checking
* bounds of available user data.
*
* Example:
*
* snprintf(dev->d_appdata, UIP_APPDATA_SIZE, "%u\n", i);
*/
#define UIP_APPDATA_SIZE (CONFIG_NET_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 in_addr_t uip_ip4addr_t;
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_driver_s; /* Forward reference */
struct uip_conn
{
dq_entry_t node; /* Implements a doubly linked list */
#if 0 /* Not used */
uip_ipaddr_t lipaddr; /* The local IP address */
#endif
uip_ipaddr_t ripaddr; /* The IP address of the remote host */
uint16 lport; /* The local TCP port, in network byte order */
uint16 rport; /* The remoteTCP 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 (units: half-seconds) */
uint8 nrtx; /* The number of retransmissions for the last
* segment sent */
/* Read-ahead buffering */
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
sq_queue_t readahead;
#endif
/* Higher level logic can retain application specific information
* in the following:
*
* data_event() is called on all events. Normally, the input flags are
* returned, however, the implemenation may set one of the following:
*
* UIP_CLOSE - Gracefully close the current connection
* UIP_ABORT - Abort (reset) the current connection on an error that
* prevents UIP_CLOSE from working.
*
* Or clear the following:
*
* UIP_NEWDATA - May be cleared to suppress returning the ACK response.
* (dev->d_len should also be set to zero in this case).
*
* accept() is called when the TCP logic has created a connection
* connection_event() is called on any of the subset of connection-related events
*/
void *data_private;
uint8 (*data_event)(struct uip_driver_s *dev, struct uip_conn *conn, uint8 flags);
void *accept_private;
int (*accept)(struct uip_conn *listener, struct uip_conn *conn);
void *connection_private;
void (*connection_event)(struct uip_conn *conn, uint8 flags);
};
/* The following structure is used to handle read-ahead buffering for TCP
* connection. When incoming TCP data is received while no application is
* listening for the data, that data will be retained in these read-ahead
* buffers so that no data is lost.
*/
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
struct uip_readahead_s
{
sq_entry_t rh_node; /* Supports a singly linked list */
uint16 rh_nbytes; /* Number of bytes available in this buffer */
uint8 rh_buffer[CONFIG_NET_TCP_READAHEAD_BUFSIZE];
};
#endif
#ifdef CONFIG_NET_UDP
/* Representation of a uIP UDP connection */
struct uip_udp_conn
{
dq_entry_t node; /* Supports a doubly linked list */
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 */
/* Defines the UDP callback */
void *private;
void (*event)(struct uip_driver_s *dev, struct uip_udp_conn *conn, uint8 flags);
};
#endif /* CONFIG_NET_UDP */
/* The structure holding the TCP/IP statistics that are gathered if
* CONFIG_NET_STATISTICS is defined.
*/
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 received 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
available connections */
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 Ip header */
uint8 vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
uint8 tcf; /* Bits 0-3: traffic class (LS), 4-bits: flow label (MS) */
uint16 flow; /* 16-bit flow label (LS) */
uint8 len[2]; /* 16-bit Payload length */
uint8 proto; /* 8-bit Next header (same as IPv4 protocol field) */
uint8 ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
uip_ip6addr_t srcipaddr; /* 128-bit Source address */
uip_ip6addr_t destipaddr; /* 128-bit Destination address */
#else /* CONFIG_NET_IPv6 */
/* IPv4 IP header */
uint8 vhl; /* 8-bit Version (4) and header length (5 or 6) */
uint8 tos; /* 8-bit Type of service (e.g., 6=TCP) */
uint8 len[2]; /* 16-bit Total length */
uint8 ipid[2]; /* 16-bit Identification */
uint8 ipoffset[2]; /* 16-bit IP flags + fragment offset */
uint8 ttl; /* 8-bit Time to Live */
uint8 proto; /* 8-bit Protocol */
uint16 ipchksum; /* 16-bit Header checksum */
uint16 srcipaddr[2]; /* 32-bit Source IP address */
uint16 destipaddr[2]; /* 32-bit Destination IP address */
#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 Ip header */
uint8 vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
uint8 tcf; /* Bits 0-3: traffic class (LS), bits 4-7: flow label (MS) */
uint16 flow; /* 16-bit flow label (LS) */
uint8 len[2]; /* 16-bit Payload length */
uint8 proto; /* 8-bit Next header (same as IPv4 protocol field) */
uint8 ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
uip_ip6addr_t srcipaddr; /* 128-bit Source address */
uip_ip6addr_t destipaddr; /* 128-bit Destination address */
#else /* CONFIG_NET_IPv6 */
/* IPv4 IP header */
uint8 vhl; /* 8-bit Version (4) and header length (5 or 6) */
uint8 tos; /* 8-bit Type of service (e.g., 6=TCP) */
uint8 len[2]; /* 16-bit Total length */
uint8 ipid[2]; /* 16-bit Identification */
uint8 ipoffset[2]; /* 16-bit IP flags + fragment offset */
uint8 ttl; /* 8-bit Time to Live */
uint8 proto; /* 8-bit Protocol */
uint16 ipchksum; /* 16-bit Header checksum */
uint16 srcipaddr[2]; /* 32-bit Source IP address */
uint16 destipaddr[2]; /* 32-bit Destination IP address */
#endif /* CONFIG_NET_IPv6 */
/* ICMP (echo) header */
uint8 type;
uint8 icode;
uint16 icmpchksum;
#ifndef CONFIG_NET_IPv6
uint16 id;
uint16 seqno;
#else /* !CONFIG_NET_IPv6 */
uint8 flags;
uint8 reserved1;
uint8 reserved2;
uint8 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 Ip header */
uint8 vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
uint8 tcf; /* Bits 0-3: traffic class (LS), 4-bits: flow label (MS) */
uint16 flow; /* 16-bit flow label (LS) */
uint8 len[2]; /* 16-bit Payload length */
uint8 proto; /* 8-bit Next header (same as IPv4 protocol field) */
uint8 ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
uip_ip6addr_t srcipaddr; /* 128-bit Source address */
uip_ip6addr_t destipaddr; /* 128-bit Destination address */
#else /* CONFIG_NET_IPv6 */
/* IPv4 header */
uint8 vhl; /* 8-bit Version (4) and header length (5 or 6) */
uint8 tos; /* 8-bit Type of service (e.g., 6=TCP) */
uint8 len[2]; /* 16-bit Total length */
uint8 ipid[2]; /* 16-bit Identification */
uint8 ipoffset[2]; /* 16-bit IP flags + fragment offset */
uint8 ttl; /* 8-bit Time to Live */
uint8 proto; /* 8-bit Protocol */
uint16 ipchksum; /* 16-bit Header checksum */
uint16 srcipaddr[2]; /* 32-bit Source IP address */
uint16 destipaddr[2]; /* 32-bit Destination IP address */
#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 current UDP connection */
#ifdef CONFIG_NET_UDP
extern struct uip_udp_conn *uip_udp_conn;
#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;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* 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.
*/
extern void uip_initialize(void);
/* This function may be used at boot time to set the initial ip_id.*/
extern 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.
*
* 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
/* Bind a TCP connection to a local address */
#ifdef CONFIG_NET_IPv6
extern int uip_tcpbind(struct uip_conn *conn, const struct sockaddr_in6 *addr);
#else
extern int uip_tcpbind(struct uip_conn *conn, const struct sockaddr_in *addr);
#endif
/* This function implements the UIP specific parts of the standard
* TCP connect() operation: It connects to a remote host using TCP.
*
* This function is used to start a new connection to the specified
* port on the specied host. It uses the connection structure that was
* allocated by a preceding socket() call. It 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_tcpconnect().
*
* This function is called from normal user level code.
*/
#ifdef CONFIG_NET_IPv6
extern int uip_tcpconnect(struct uip_conn *conn, const struct sockaddr_in6 *addr);
#else
extern int uip_tcpconnect(struct uip_conn *conn, const struct sockaddr_in *addr);
#endif
/* Start listening to the port bound to the specified TCP connection */
extern int uip_listen(struct uip_conn *conn);
/* Stop listening to the port bound to the specified TCP connection */
extern int uip_unlisten(struct uip_conn *conn);
/* Check if a connection has outstanding (i.e., unacknowledged) data */
#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() 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.
*/
extern void uip_send(struct uip_driver_s *dev, const void *buf, int len);
/* Access to TCP read-ahead buffers */
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
extern struct uip_readahead_s *uip_tcpreadaheadalloc(void);
extern void uip_tcpreadaheadrelease(struct uip_readahead_s *buf);
#endif /* CONFIG_NET_NTCP_READAHEAD_BUFFERS */
/* The length of any incoming data that is currently avaliable (if avaliable)
* in the d_appdata buffer.
*
* The test function uip_data() must first be used to check if there
* is any data available at all.
*/
#define uip_datalen(dev) ((dev)->d_len)
/* 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(conn) ((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(conn,f) \
do { \
(f) |= UIP_NEWDATA; \
(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 new incoming data available?
*
* Will reduce to non-zero if there is new data for the application
* present at the d_appdata pointer. The size of the data is
* avaliable through the d_len element.
*/
#define uip_newdata_event(f) ((f) & 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_ack_event(f) ((f) & UIP_ACKDATA)
/* Has the connection just been connected?
*
* Reduces to non-zero if the current connenetutils/telnetd/telnetd.cction 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_event(f) ((f) & 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_close_event(f) ((f) & 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_abort_event(f) ((f) & UIP_ABORT)
/* Has the connection timed out?
*
* Non-zero if the current connection has been aborted due to too many
* retransmissions.
*/
#define uip_timeout_event(f) ((f) & 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_event(f) ((f) & 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_event(f) ((f) & UIP_POLL)
/* Get the initial maxium segment size (MSS) of the current
* connection.
*/
#define uip_initialmss(conn) ((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(conn) ((conn)->mss)
/* Bind a UDP connection to a local address */
#ifdef CONFIG_NET_IPv6
extern int uip_udpbind(struct uip_udp_conn *conn, const struct sockaddr_in6 *addr);
#else
extern int uip_udpbind(struct uip_udp_conn *conn, const struct sockaddr_in *addr);
#endif
/* 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_udpbind() call, after the uip_udpconnect() function has been
* called.
*
* This function is called as part of the implementation of sendto
* and recvfrom.
*
* addr The address of the remote host.
*/
#ifdef CONFIG_NET_IPv6
extern int uip_udpconnect(struct uip_udp_conn *conn, const struct sockaddr_in6 *addr);
#else
extern int uip_udpconnect(struct uip_udp_conn *conn, const struct sockaddr_in *addr);
#endif
/* Enable/disable UDP callbacks on a connection */
extern void uip_udpenable(struct uip_udp_conn *conn);
extern void uip_udpdisable(struct uip_udp_conn *conn);
/* 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 { \
addr = HTONL((addr0) << 24 | (addr1) << 16 | (addr2) << 8 | (addr3)); \
} while(0)
/* Convert an IPv4 address of the form uint16[2] to an in_addr_t */
#ifdef CONFIG_ENDIAN_BIG
# define uip_ip4addr_conv(addr) (((in_addr_t)((uint16*)addr)[0] << 16) | (in_addr_t)((uint16*)addr)[1])
#else
# define uip_ip4addr_conv(addr) (((in_addr_t)((uint16*)addr)[1] << 16) | (in_addr_t)((uint16*)addr)[0])
#endif
/* 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 { \
(dest) = (in_addr_t)(src); \
} while(0)
# define uiphdr_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))
# define uiphdr_ipaddr_copy(dest, src) uip_ipaddr_copy(dest, src)
#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) (addr1 == addr2)
# define uiphdr_ipaddr_cmp(addr1, addr2) uip_ipaddr_cmp(uip_ip4addr_conv(addr1), uip_ip4addr_conv(addr2))
#else /* !CONFIG_NET_IPv6 */
# define uip_ipaddr_cmp(addr1, addr2) (memcmp(&addr1, &addr2, sizeof(uip_ip6addr_t)) == 0)
# define uiphdr_ipaddr_cmp(addr1, addr2) uip_ipaddr_cmp(addr, addr2)
#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.
*/
#ifndef CONFIG_NET_IPv6
# define uip_ipaddr_maskcmp(addr1, addr2, mask) \
(((in_addr_t)(addr1) & (in_addr_t)(mask)) == \
((in_addr_t)(addr2) & (in_addr_t)(mask)))
#else
extern boolean uip_ipaddr_maskcmp(uip_addr_t addr1, uip_addr_t addr2,
uip_addr_t mask);
#endif
/* 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 { \
(in_addr_t)(dest) = (in_addr_t)(src) & (in_addr_t)(mask); \
} while(0)
#endif /* __NET_UIP_UIP_H */
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