| /* |
| * 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; |
| }; |
| |
| /* 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_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 |
| int udp_debug_print(struct udp_hdr *udphdr); |
| #else |
| #define udp_debug_print(udphdr) |
| #endif |
| #endif /* __LWIP_UDP_H__ */ |
| |
| |