/* | |
* Copyright (c) 2001-2004 Swedish Institute of Computer Science. | |
* 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. | |
* | |
* This file is part of the lwIP TCP/IP stack. | |
* | |
* Author: Adam Dunkels <adam@sics.se> | |
* | |
*/ | |
#ifndef __LWIP_UDP_H__ | |
#define __LWIP_UDP_H__ | |
#include "lwip/arch.h" | |
#include "lwip/pbuf.h" | |
#include "lwip/inet.h" | |
#include "lwip/ip.h" | |
#define UDP_HLEN 8 | |
struct udp_hdr { | |
PACK_STRUCT_FIELD(u16_t src); | |
PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */ | |
PACK_STRUCT_FIELD(u16_t len); | |
PACK_STRUCT_FIELD(u16_t chksum); | |
} PACK_STRUCT_STRUCT; | |
#define UDP_FLAGS_NOCHKSUM 0x01U | |
#define UDP_FLAGS_UDPLITE 0x02U | |
#define UDP_FLAGS_CONNECTED 0x04U | |
struct udp_pcb { | |
/* Common members of all PCB types */ | |
IP_PCB; | |
/* Protocol specific PCB members */ | |
struct udp_pcb *next; | |
u8_t flags; | |
u16_t local_port, remote_port; | |
u16_t chksum_len; | |
void (* recv)(void *arg, struct udp_pcb *pcb, struct pbuf *p, | |
struct ip_addr *addr, u16_t port); | |
void *recv_arg; | |
}; | |
/* udp_pcbs export for exernal reference (e.g. SNMP agent) */ | |
extern struct udp_pcb *udp_pcbs; | |
/* The following functions is the application layer interface to the | |
UDP code. */ | |
struct udp_pcb * udp_new (void); | |
void udp_remove (struct udp_pcb *pcb); | |
err_t udp_bind (struct udp_pcb *pcb, struct ip_addr *ipaddr, | |
u16_t port); | |
err_t udp_connect (struct udp_pcb *pcb, struct ip_addr *ipaddr, | |
u16_t port); | |
void udp_disconnect (struct udp_pcb *pcb); | |
void udp_recv (struct udp_pcb *pcb, | |
void (* recv)(void *arg, struct udp_pcb *upcb, | |
struct pbuf *p, | |
struct ip_addr *addr, | |
u16_t port), | |
void *recv_arg); | |
err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *dst_ip, u16_t dst_port); | |
err_t udp_send (struct udp_pcb *pcb, struct pbuf *p); | |
#define udp_flags(pcb) ((pcb)->flags) | |
#define udp_setflags(pcb, f) ((pcb)->flags = (f)) | |
/* The following functions are the lower layer interface to UDP. */ | |
void udp_input (struct pbuf *p, struct netif *inp); | |
void udp_init (void); | |
#if UDP_DEBUG | |
void udp_debug_print(struct udp_hdr *udphdr); | |
#else | |
#define udp_debug_print(udphdr) | |
#endif | |
#endif /* __LWIP_UDP_H__ */ | |