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