178 lines
6.2 KiB
C
178 lines
6.2 KiB
C
/*
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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_MSG_H__
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#define __LWIP_API_MSG_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/ip_addr.h"
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#include "lwip/err.h"
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#include "lwip/sys.h"
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#include "lwip/igmp.h"
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#include "lwip/api.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* For the netconn API, these values are use as a bitmask! */
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#define NETCONN_SHUT_RD 1
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#define NETCONN_SHUT_WR 2
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#define NETCONN_SHUT_RDWR (NETCONN_SHUT_RD | NETCONN_SHUT_WR)
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/* 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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/** This struct includes everything that is necessary to execute a function
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for a netconn in another thread context (mainly used to process netconns
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in the tcpip_thread context to be thread safe). */
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struct api_msg_msg {
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/** The netconn which to process - always needed: it includes the semaphore
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which is used to block the application thread until the function finished. */
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struct netconn *conn;
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/** The return value of the function executed in tcpip_thread. */
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err_t err;
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/** Depending on the executed function, one of these union members is used */
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union {
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/** used for lwip_netconn_do_send */
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struct netbuf *b;
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/** used for lwip_netconn_do_newconn */
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struct {
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u8_t proto;
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} n;
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/** used for lwip_netconn_do_bind and lwip_netconn_do_connect */
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struct {
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ip_addr_t *ipaddr;
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u16_t port;
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} bc;
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/** used for lwip_netconn_do_getaddr */
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struct {
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ipX_addr_t *ipaddr;
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u16_t *port;
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u8_t local;
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} ad;
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/** used for lwip_netconn_do_write */
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struct {
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const void *dataptr;
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size_t len;
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u8_t apiflags;
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#if LWIP_SO_SNDTIMEO
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u32_t time_started;
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#endif /* LWIP_SO_SNDTIMEO */
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} w;
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/** used for lwip_netconn_do_recv */
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struct {
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u32_t len;
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} r;
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/** used for lwip_netconn_do_close (/shutdown) */
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struct {
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u8_t shut;
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} sd;
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#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
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/** used for lwip_netconn_do_join_leave_group */
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struct {
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ipX_addr_t *multiaddr;
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ipX_addr_t *netif_addr;
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enum netconn_igmp join_or_leave;
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} jl;
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#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
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#if TCP_LISTEN_BACKLOG
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struct {
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u8_t backlog;
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} lb;
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#endif /* TCP_LISTEN_BACKLOG */
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} msg;
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};
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/** This struct contains a function to execute in another thread context and
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a struct api_msg_msg that serves as an argument for this function.
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This is passed to tcpip_apimsg to execute functions in tcpip_thread context. */
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struct api_msg {
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/** function to execute in tcpip_thread context */
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void (* function)(struct api_msg_msg *msg);
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/** arguments for this function */
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struct api_msg_msg msg;
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};
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#if LWIP_DNS
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/** As lwip_netconn_do_gethostbyname requires more arguments but doesn't require a netconn,
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it has its own struct (to avoid struct api_msg getting bigger than necessary).
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lwip_netconn_do_gethostbyname must be called using tcpip_callback instead of tcpip_apimsg
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(see netconn_gethostbyname). */
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struct dns_api_msg {
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/** Hostname to query or dotted IP address string */
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const char *name;
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/** Rhe resolved address is stored here */
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ip_addr_t *addr;
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/** This semaphore is posted when the name is resolved, the application thread
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should wait on it. */
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sys_sem_t *sem;
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/** Errors are given back here */
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err_t *err;
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};
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#endif /* LWIP_DNS */
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void lwip_netconn_do_newconn ( struct api_msg_msg *msg);
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void lwip_netconn_do_delconn ( struct api_msg_msg *msg);
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void lwip_netconn_do_bind ( struct api_msg_msg *msg);
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void lwip_netconn_do_connect ( struct api_msg_msg *msg);
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void lwip_netconn_do_disconnect ( struct api_msg_msg *msg);
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void lwip_netconn_do_listen ( struct api_msg_msg *msg);
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void lwip_netconn_do_send ( struct api_msg_msg *msg);
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void lwip_netconn_do_recv ( struct api_msg_msg *msg);
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void lwip_netconn_do_write ( struct api_msg_msg *msg);
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void lwip_netconn_do_getaddr ( struct api_msg_msg *msg);
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void lwip_netconn_do_close ( struct api_msg_msg *msg);
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void lwip_netconn_do_shutdown ( struct api_msg_msg *msg);
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#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD)
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void lwip_netconn_do_join_leave_group( struct api_msg_msg *msg);
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#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */
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#if LWIP_DNS
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void lwip_netconn_do_gethostbyname(void *arg);
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#endif /* LWIP_DNS */
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struct netconn* netconn_alloc(enum netconn_type t, netconn_callback callback);
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void netconn_free(struct netconn *conn);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_NETCONN */
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#endif /* __LWIP_API_MSG_H__ */
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