2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
32 #ifndef __LWIP_API_H__
33 #define __LWIP_API_H__
37 #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
39 #include "lwip/netbuf.h"
41 #include "lwip/ip_addr.h"
48 /* Throughout this file, IP addresses and port numbers are expected to be in
49 * the same byte order as in the corresponding pcb.
52 /* Flags for netconn_write */
53 #define NETCONN_NOFLAG 0x00
54 #define NETCONN_NOCOPY 0x00 /* Only for source code compatibility */
55 #define NETCONN_COPY 0x01
56 #define NETCONN_MORE 0x02
58 /* Helpers to process several netconn_types by the same code */
59 #define NETCONNTYPE_GROUP(t) (t&0xF0)
60 #define NETCONNTYPE_DATAGRAM(t) (t&0xE0)
64 /* NETCONN_TCP Group */
66 /* NETCONN_UDP Group */
68 NETCONN_UDPLITE = 0x21,
69 NETCONN_UDPNOCHKSUM= 0x22,
70 /* NETCONN_RAW Group */
94 #endif /* LWIP_IGMP */
96 /* forward-declare some structs to avoid to include their headers */
103 /** A callback prototype to inform about events for a netconn */
104 typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len);
106 /** A netconn descriptor */
108 /** type of the netconn (TCP, UDP or RAW) */
109 enum netconn_type type;
110 /** current state of the netconn */
111 enum netconn_state state;
112 /** the lwIP internal protocol control block */
119 /** the last error this netconn had */
121 /** sem that is used to synchroneously execute functions in the core context */
122 sys_sem_t op_completed;
123 /** mbox where received packets are stored until they are fetched
124 by the netconn application thread (can grow quite big) */
126 /** mbox where new connections are stored until processed
127 by the application thread */
128 sys_mbox_t acceptmbox;
129 /** only used for socket layer */
132 /** timeout to wait for new data to be received
133 (or connections to arrive for listening netconns) */
135 #endif /* LWIP_SO_RCVTIMEO */
137 /** maximum amount of bytes queued in recvmbox */
139 #endif /* LWIP_SO_RCVBUF */
141 /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
142 this temporarily stores the message. */
143 struct api_msg_msg *write_msg;
144 /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
145 this temporarily stores how much is already sent. */
147 #if LWIP_TCPIP_CORE_LOCKING
148 /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
149 this temporarily stores whether to wake up the original application task
150 if data couldn't be sent in the first try. */
152 #endif /* LWIP_TCPIP_CORE_LOCKING */
153 /** A callback function that is informed about events for this netconn */
154 netconn_callback callback;
157 /* Register an Network connection event */
158 #define API_EVENT(c,e,l) if (c->callback) { \
159 (*c->callback)(c, e, l); \
162 /* Network connection functions: */
163 #define netconn_new(t) netconn_new_with_proto_and_callback(t, 0, NULL)
164 #define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c)
166 netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto,
167 netconn_callback callback);
168 err_t netconn_delete (struct netconn *conn);
169 enum netconn_type netconn_type (struct netconn *conn);
171 err_t netconn_getaddr (struct netconn *conn,
172 struct ip_addr *addr,
175 #define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0)
176 #define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1)
178 err_t netconn_bind (struct netconn *conn,
179 struct ip_addr *addr,
181 err_t netconn_connect (struct netconn *conn,
182 struct ip_addr *addr,
184 err_t netconn_disconnect (struct netconn *conn);
185 err_t netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
186 #define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG)
187 struct netconn * netconn_accept (struct netconn *conn);
188 struct netbuf * netconn_recv (struct netconn *conn);
189 err_t netconn_sendto (struct netconn *conn,
190 struct netbuf *buf, struct ip_addr *addr, u16_t port);
191 err_t netconn_send (struct netconn *conn,
193 err_t netconn_write (struct netconn *conn,
194 const void *dataptr, int size,
196 err_t netconn_close (struct netconn *conn);
199 err_t netconn_join_leave_group (struct netconn *conn,
200 struct ip_addr *multiaddr,
201 struct ip_addr *interface,
202 enum netconn_igmp join_or_leave);
203 #endif /* LWIP_IGMP */
205 err_t netconn_gethostbyname(const char *name, struct ip_addr *addr);
206 #endif /* LWIP_DNS */
208 #define netconn_err(conn) ((conn)->err)
209 #define netconn_recv_bufsize(conn) ((conn)->recv_bufsize)
215 #endif /* LWIP_NETCONN */
217 #endif /* __LWIP_API_H__ */