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# udp.h

Go to the documentation of this file.

    00001 /*
    00002  * Copyright (c) 2001, Swedish Institute of Computer Science.
    00003  * All rights reserved.
    00004  *
    00005  * Redistribution and use in source and binary forms, with or without
    00006  * modification, are permitted provided that the following conditions
    00007  * are met:
    00008  * 1. Redistributions of source code must retain the above copyright
    00009  *    notice, this list of conditions and the following disclaimer.
    00010  * 2. Redistributions in binary form must reproduce the above copyright
    00011  *    notice, this list of conditions and the following disclaimer in the
    00012  *    documentation and/or other materials provided with the distribution.
    00013  * 3. Neither the name of the Institute nor the names of its contributors
    00014  *    may be used to endorse or promote products derived from this software
    00015  *    without specific prior written permission.
    00016  *
    00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
    00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
    00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    00027  * SUCH DAMAGE.
    00028  *
    00029  * This file is part of the lwIP TCP/IP stack.
    00030  *
    00031  * Author: Adam Dunkels <adam@sics.se>
    00032  *
    00033  * $Id: udp_8h-source.html 88 2016-01-12 00:11:29Z reddawg $
    00034  */
    00035 #ifndef __LWIP_UDP_H__
    00036 #define __LWIP_UDP_H__
    00037
    00038 #include "net/arch.h"
    00039
    00040 #include "net/pbuf.h"
    00041 //UBU
    00042 #include "net/ipv4/inet.h"
    00043 //UBU
    00044 #include "net/ipv4/ip.h"
    00045
    00046 #include "net/err.h"
    00047
    00048 #define UDP_HLEN 8
    00049
    00050 struct udp_hdr {
    00051   PACK_STRUCT_FIELD(uInt16 src);
    00052   PACK_STRUCT_FIELD(uInt16 dest);  /* src/dest UDP ports */
    00053   PACK_STRUCT_FIELD(uInt16 len);
    00054   PACK_STRUCT_FIELD(uInt16 chksum);
    00055 } PACK_STRUCT_STRUCT;
    00056
    00057 #define UDP_FLAGS_NOCHKSUM 0x01
    00058 #define UDP_FLAGS_UDPLITE  0x02
    00059
    00060 struct udp_pcb {
    00061   struct udp_pcb *next;
    00062
    00063   struct ip_addr local_ip, remote_ip;
    00064   uInt16 local_port, remote_port;
    00065
    00066   uInt8 flags;
    00067   uInt16 chksum_len;
    00068
    00069   void (* recv)(void *arg, struct udp_pcb *pcb, struct pbuf *p,
    00070                 struct ip_addr *addr, uInt16 port);
    00071   void *recv_arg;
    00072 };
    00073
    00074 /* The following functions is the application layer interface to the
    00075    UDP code. */
    00076 struct udp_pcb * udp_new        (void);
    00077 void             udp_remove     (struct udp_pcb *pcb);
    00078 err_t            udp_bind       (struct udp_pcb *pcb, struct ip_addr *ipaddr,
    00079                                  uInt16 port);
    00080 err_t            udp_connect    (struct udp_pcb *pcb, struct ip_addr *ipaddr,
    00081                                  uInt16 port);
    00082 void             udp_recv       (struct udp_pcb *pcb,
    00083                                  void (* recv)(void *arg, struct udp_pcb *upcb,
    00084                                                struct pbuf *p,
    00085                                                struct ip_addr *addr,
    00086                                                uInt16 port),
    00087                                  void *recv_arg);
    00088 err_t            udp_send       (struct udp_pcb *pcb, struct pbuf *p);
    00089
    00090 #define          udp_flags(pcb)  ((pcb)->flags)
    00091 #define          udp_setflags(pcb, f)  ((pcb)->flags = (f))
    00092
    00093
    00094 /* The following functions is the lower layer interface to UDP. */
    00095 uInt8             udp_lookup     (struct ip_hdr *iphdr, struct netif *inp);
    00096 void             udp_input      (struct pbuf *p, struct netif *inp);
    00097 void             udp_init       (void);
    00098
    00099
    00100 #endif /* __LWIP_UDP_H__ */
    00101
    00102