Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without modification, |
| 6 | * are permitted provided that the following conditions are met: |
| 7 | * |
| 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. |
| 15 | * |
| 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 |
| 25 | * OF SUCH DAMAGE. |
| 26 | * |
| 27 | * This file is part of the lwIP TCP/IP stack. |
| 28 | * |
| 29 | * Author: Adam Dunkels <adam@sics.se> |
| 30 | * |
| 31 | */ |
| 32 | #ifndef __LWIP_UDP_H__ |
| 33 | #define __LWIP_UDP_H__ |
| 34 | |
| 35 | #include "lwip/arch.h" |
| 36 | |
| 37 | #include "lwip/pbuf.h" |
| 38 | #include "lwip/inet.h" |
| 39 | #include "lwip/ip.h" |
| 40 | |
| 41 | #define UDP_HLEN 8 |
| 42 | |
| 43 | struct udp_hdr { |
| 44 | PACK_STRUCT_FIELD(u16_t src); |
| 45 | PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */ |
| 46 | PACK_STRUCT_FIELD(u16_t len); |
| 47 | PACK_STRUCT_FIELD(u16_t chksum); |
| 48 | } PACK_STRUCT_STRUCT; |
| 49 | |
| 50 | #define UDP_FLAGS_NOCHKSUM 0x01U |
| 51 | #define UDP_FLAGS_UDPLITE 0x02U |
| 52 | #define UDP_FLAGS_CONNECTED 0x04U |
| 53 | |
| 54 | struct udp_pcb { |
| 55 | /* Common members of all PCB types */ |
| 56 | IP_PCB; |
| 57 | |
| 58 | /* Protocol specific PCB members */ |
| 59 | |
| 60 | struct udp_pcb *next; |
| 61 | |
| 62 | u8_t flags; |
| 63 | u16_t local_port, remote_port; |
| 64 | |
| 65 | u16_t chksum_len; |
| 66 | |
| 67 | void (* recv)(void *arg, struct udp_pcb *pcb, struct pbuf *p, |
| 68 | struct ip_addr *addr, u16_t port); |
| 69 | void *recv_arg; |
| 70 | }; |
| 71 | |
| 72 | /* The following functions is the application layer interface to the |
| 73 | UDP code. */ |
| 74 | struct udp_pcb * udp_new (void); |
| 75 | void udp_remove (struct udp_pcb *pcb); |
| 76 | err_t udp_bind (struct udp_pcb *pcb, struct ip_addr *ipaddr, |
| 77 | u16_t port); |
| 78 | err_t udp_connect (struct udp_pcb *pcb, struct ip_addr *ipaddr, |
| 79 | u16_t port); |
| 80 | void udp_disconnect (struct udp_pcb *pcb); |
| 81 | void udp_recv (struct udp_pcb *pcb, |
| 82 | void (* recv)(void *arg, struct udp_pcb *upcb, |
| 83 | struct pbuf *p, |
| 84 | struct ip_addr *addr, |
| 85 | u16_t port), |
| 86 | void *recv_arg); |
| 87 | err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *dst_ip, u16_t dst_port); |
| 88 | err_t udp_send (struct udp_pcb *pcb, struct pbuf *p); |
| 89 | |
| 90 | #define udp_flags(pcb) ((pcb)->flags) |
| 91 | #define udp_setflags(pcb, f) ((pcb)->flags = (f)) |
| 92 | |
| 93 | /* The following functions are the lower layer interface to UDP. */ |
| 94 | void udp_input (struct pbuf *p, struct netif *inp); |
| 95 | void udp_init (void); |
| 96 | |
| 97 | #if UDP_DEBUG |
| 98 | void udp_debug_print(struct udp_hdr *udphdr); |
| 99 | #else |
| 100 | #define udp_debug_print(udphdr) |
| 101 | #endif |
| 102 | #endif /* __LWIP_UDP_H__ */ |
| 103 | |
| 104 | |