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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __LWIP_API_H__
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#define __LWIP_API_H__
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#include "lwip/opt.h"
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#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
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#include <stddef.h> /* for size_t */
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#include "lwip/netbuf.h"
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#include "lwip/sys.h"
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#include "lwip/ip_addr.h"
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#include "lwip/err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Throughout this file, IP addresses and port numbers are expected to be in
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* the same byte order as in the corresponding pcb.
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*/
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/* Flags for netconn_write (u8_t) */
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#define NETCONN_NOFLAG 0x00
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#define NETCONN_NOCOPY 0x00 /* Only for source code compatibility */
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#define NETCONN_COPY 0x01
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#define NETCONN_MORE 0x02
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#define NETCONN_DONTBLOCK 0x04
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/* Flags for struct netconn.flags (u8_t) */
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/** TCP: when data passed to netconn_write doesn't fit into the send buffer,
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this temporarily stores whether to wake up the original application task
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if data couldn't be sent in the first try. */
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#define NETCONN_FLAG_WRITE_DELAYED 0x01
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/** Should this netconn avoid blocking? */
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#define NETCONN_FLAG_NON_BLOCKING 0x02
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/** Was the last connect action a non-blocking one? */
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#define NETCONN_FLAG_IN_NONBLOCKING_CONNECT 0x04
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/** If this is set, a TCP netconn must call netconn_recved() to update
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the TCP receive window (done automatically if not set). */
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#define NETCONN_FLAG_NO_AUTO_RECVED 0x08
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/** If a nonblocking write has been rejected before, poll_tcp needs to
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check if the netconn is writable again */
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#define NETCONN_FLAG_CHECK_WRITESPACE 0x10
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/* Helpers to process several netconn_types by the same code */
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#define NETCONNTYPE_GROUP(t) (t&0xF0)
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#define NETCONNTYPE_DATAGRAM(t) (t&0xE0)
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/** Protocol family and type of the netconn */
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enum netconn_type {
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NETCONN_INVALID = 0,
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/* NETCONN_TCP Group */
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NETCONN_TCP = 0x10,
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/* NETCONN_UDP Group */
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NETCONN_UDP = 0x20,
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NETCONN_UDPLITE = 0x21,
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NETCONN_UDPNOCHKSUM= 0x22,
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/* NETCONN_RAW Group */
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NETCONN_RAW = 0x40
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};
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/** Current state of the netconn. Non-TCP netconns are always
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* in state NETCONN_NONE! */
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enum netconn_state {
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NETCONN_NONE,
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NETCONN_WRITE,
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NETCONN_LISTEN,
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NETCONN_CONNECT,
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NETCONN_CLOSE
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};
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/** Use to inform the callback function about changes */
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enum netconn_evt {
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NETCONN_EVT_RCVPLUS,
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NETCONN_EVT_RCVMINUS,
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NETCONN_EVT_SENDPLUS,
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NETCONN_EVT_SENDMINUS,
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NETCONN_EVT_ERROR
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};
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#if LWIP_IGMP
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/** Used for netconn_join_leave_group() */
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enum netconn_igmp {
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NETCONN_JOIN,
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NETCONN_LEAVE
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};
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#endif /* LWIP_IGMP */
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/* forward-declare some structs to avoid to include their headers */
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struct ip_pcb;
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struct tcp_pcb;
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struct udp_pcb;
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struct raw_pcb;
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struct netconn;
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struct api_msg_msg;
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/** A callback prototype to inform about events for a netconn */
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typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len);
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/** A netconn descriptor */
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struct netconn {
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/** type of the netconn (TCP, UDP or RAW) */
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enum netconn_type type;
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/** current state of the netconn */
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enum netconn_state state;
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/** the lwIP internal protocol control block */
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union {
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struct ip_pcb *ip;
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struct tcp_pcb *tcp;
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struct udp_pcb *udp;
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struct raw_pcb *raw;
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} pcb;
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/** the last error this netconn had */
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err_t last_err;
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/** sem that is used to synchroneously execute functions in the core context */
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sys_sem_t op_completed;
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/** mbox where received packets are stored until they are fetched
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by the netconn application thread (can grow quite big) */
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sys_mbox_t recvmbox;
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#if LWIP_TCP
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/** mbox where new connections are stored until processed
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by the application thread */
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sys_mbox_t acceptmbox;
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#endif /* LWIP_TCP */
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158
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/** only used for socket layer */
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159
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#if LWIP_SOCKET
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int socket;
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161
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#endif /* LWIP_SOCKET */
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162
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#if LWIP_SO_RCVTIMEO
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/** timeout to wait for new data to be received
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(or connections to arrive for listening netconns) */
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int recv_timeout;
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166
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#endif /* LWIP_SO_RCVTIMEO */
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167
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#if LWIP_SO_RCVBUF
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168
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/** maximum amount of bytes queued in recvmbox
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169
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not used for TCP: adjust TCP_WND instead! */
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170
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int recv_bufsize;
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#endif /* LWIP_SO_RCVBUF */
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/** number of bytes currently in recvmbox to be received,
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173
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tested against recv_bufsize to limit bytes on recvmbox
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174
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for UDP and RAW
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@todo: should only be necessary with LWIP_SO_RCVBUF==1 */
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s16_t recv_avail;
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/** flags holding more netconn-internal state, see NETCONN_FLAG_* defines */
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u8_t flags;
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179
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#if LWIP_TCP
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/** TCP: when data passed to netconn_write doesn't fit into the send buffer,
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this temporarily stores how much is already sent. */
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size_t write_offset;
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/** TCP: when data passed to netconn_write doesn't fit into the send buffer,
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this temporarily stores the message.
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185
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Also used during connect and close. */
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186
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struct api_msg_msg *current_msg;
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#endif /* LWIP_TCP */
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/** A callback function that is informed about events for this netconn */
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189
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netconn_callback callback;
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};
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191
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/** Register an Network connection event */
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#define API_EVENT(c,e,l) if (c->callback) { \
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(*c->callback)(c, e, l); \
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}
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/** Set conn->last_err to err but don't overwrite fatal errors */
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#define NETCONN_SET_SAFE_ERR(conn, err) do { \
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SYS_ARCH_DECL_PROTECT(lev); \
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SYS_ARCH_PROTECT(lev); \
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if (!ERR_IS_FATAL((conn)->last_err)) { \
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(conn)->last_err = err; \
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} \
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SYS_ARCH_UNPROTECT(lev); \
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} while(0);
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/* Network connection functions: */
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#define netconn_new(t) netconn_new_with_proto_and_callback(t, 0, NULL)
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#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c)
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210
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struct
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netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto,
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212
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netconn_callback callback);
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213
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err_t netconn_delete(struct netconn *conn);
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/** Get the type of a netconn (as enum netconn_type). */
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#define netconn_type(conn) (conn->type)
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217
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err_t netconn_getaddr(struct netconn *conn, ip_addr_t *addr,
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218
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u16_t *port, u8_t local);
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#define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0)
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#define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1)
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221
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err_t netconn_bind(struct netconn *conn, ip_addr_t *addr, u16_t port);
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223
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err_t netconn_connect(struct netconn *conn, ip_addr_t *addr, u16_t port);
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224
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err_t netconn_disconnect (struct netconn *conn);
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225
|
err_t netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
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|
#define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG)
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227
|
err_t netconn_accept(struct netconn *conn, struct netconn **new_conn);
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228
|
err_t netconn_recv(struct netconn *conn, struct netbuf **new_buf);
|
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229
|
err_t netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf);
|
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|
230
|
void netconn_recved(struct netconn *conn, u32_t length);
|
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|
231
|
err_t netconn_sendto(struct netconn *conn, struct netbuf *buf,
|
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|
232
|
ip_addr_t *addr, u16_t port);
|
| slowness |
0:58c3d014a4e7
|
233
|
err_t netconn_send(struct netconn *conn, struct netbuf *buf);
|
| slowness |
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|
234
|
err_t netconn_write(struct netconn *conn, const void *dataptr, size_t size,
|
| slowness |
0:58c3d014a4e7
|
235
|
u8_t apiflags);
|
| slowness |
0:58c3d014a4e7
|
236
|
err_t netconn_close(struct netconn *conn);
|
| slowness |
0:58c3d014a4e7
|
237
|
err_t netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx);
|
| slowness |
0:58c3d014a4e7
|
238
|
|
| slowness |
0:58c3d014a4e7
|
239
|
#if LWIP_IGMP
|
| slowness |
0:58c3d014a4e7
|
240
|
err_t netconn_join_leave_group(struct netconn *conn, ip_addr_t *multiaddr,
|
| slowness |
0:58c3d014a4e7
|
241
|
ip_addr_t *netif_addr, enum netconn_igmp join_or_leave);
|
| slowness |
0:58c3d014a4e7
|
242
|
#endif /* LWIP_IGMP */
|
| slowness |
0:58c3d014a4e7
|
243
|
#if LWIP_DNS
|
| slowness |
0:58c3d014a4e7
|
244
|
err_t netconn_gethostbyname(const char *name, ip_addr_t *addr);
|
| slowness |
0:58c3d014a4e7
|
245
|
#endif /* LWIP_DNS */
|
| slowness |
0:58c3d014a4e7
|
246
|
|
| slowness |
0:58c3d014a4e7
|
247
|
#define netconn_err(conn) ((conn)->last_err)
|
| slowness |
0:58c3d014a4e7
|
248
|
#define netconn_recv_bufsize(conn) ((conn)->recv_bufsize)
|
| slowness |
0:58c3d014a4e7
|
249
|
|
| slowness |
0:58c3d014a4e7
|
250
|
/** Set the blocking status of netconn calls (@todo: write/send is missing) */
|
| slowness |
0:58c3d014a4e7
|
251
|
#define netconn_set_nonblocking(conn, val) do { if(val) { \
|
| slowness |
0:58c3d014a4e7
|
252
|
(conn)->flags |= NETCONN_FLAG_NON_BLOCKING; \
|
| slowness |
0:58c3d014a4e7
|
253
|
} else { \
|
| slowness |
0:58c3d014a4e7
|
254
|
(conn)->flags &= ~ NETCONN_FLAG_NON_BLOCKING; }} while(0)
|
| slowness |
0:58c3d014a4e7
|
255
|
/** Get the blocking status of netconn calls (@todo: write/send is missing) */
|
| slowness |
0:58c3d014a4e7
|
256
|
#define netconn_is_nonblocking(conn) (((conn)->flags & NETCONN_FLAG_NON_BLOCKING) != 0)
|
| slowness |
0:58c3d014a4e7
|
257
|
|
| slowness |
0:58c3d014a4e7
|
258
|
/** TCP: Set the no-auto-recved status of netconn calls (see NETCONN_FLAG_NO_AUTO_RECVED) */
|
| slowness |
0:58c3d014a4e7
|
259
|
#define netconn_set_noautorecved(conn, val) do { if(val) { \
|
| slowness |
0:58c3d014a4e7
|
260
|
(conn)->flags |= NETCONN_FLAG_NO_AUTO_RECVED; \
|
| slowness |
0:58c3d014a4e7
|
261
|
} else { \
|
| slowness |
0:58c3d014a4e7
|
262
|
(conn)->flags &= ~ NETCONN_FLAG_NO_AUTO_RECVED; }} while(0)
|
| slowness |
0:58c3d014a4e7
|
263
|
/** TCP: Get the no-auto-recved status of netconn calls (see NETCONN_FLAG_NO_AUTO_RECVED) */
|
| slowness |
0:58c3d014a4e7
|
264
|
#define netconn_get_noautorecved(conn) (((conn)->flags & NETCONN_FLAG_NO_AUTO_RECVED) != 0)
|
| slowness |
0:58c3d014a4e7
|
265
|
|
| slowness |
0:58c3d014a4e7
|
266
|
#if LWIP_SO_RCVTIMEO
|
| slowness |
0:58c3d014a4e7
|
267
|
/** Set the receive timeout in milliseconds */
|
| slowness |
0:58c3d014a4e7
|
268
|
#define netconn_set_recvtimeout(conn, timeout) ((conn)->recv_timeout = (timeout))
|
| slowness |
0:58c3d014a4e7
|
269
|
/** Get the receive timeout in milliseconds */
|
| slowness |
0:58c3d014a4e7
|
270
|
#define netconn_get_recvtimeout(conn) ((conn)->recv_timeout)
|
| slowness |
0:58c3d014a4e7
|
271
|
#endif /* LWIP_SO_RCVTIMEO */
|
| slowness |
0:58c3d014a4e7
|
272
|
#if LWIP_SO_RCVBUF
|
| slowness |
0:58c3d014a4e7
|
273
|
/** Set the receive buffer in bytes */
|
| slowness |
0:58c3d014a4e7
|
274
|
#define netconn_set_recvbufsize(conn, recvbufsize) ((conn)->recv_bufsize = (recvbufsize))
|
| slowness |
0:58c3d014a4e7
|
275
|
/** Get the receive buffer in bytes */
|
| slowness |
0:58c3d014a4e7
|
276
|
#define netconn_get_recvbufsize(conn) ((conn)->recv_bufsize)
|
| slowness |
0:58c3d014a4e7
|
277
|
#endif /* LWIP_SO_RCVBUF*/
|
| slowness |
0:58c3d014a4e7
|
278
|
|
| slowness |
0:58c3d014a4e7
|
279
|
#ifdef __cplusplus
|
| slowness |
0:58c3d014a4e7
|
280
|
}
|
| slowness |
0:58c3d014a4e7
|
281
|
#endif
|
| slowness |
0:58c3d014a4e7
|
282
|
|
| slowness |
0:58c3d014a4e7
|
283
|
#endif /* LWIP_NETCONN */
|
| slowness |
0:58c3d014a4e7
|
284
|
|
| slowness |
0:58c3d014a4e7
|
285
|
#endif /* __LWIP_API_H__ */
|
bruno LARNAUDIE