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EthernetNetIf/LPC2368/lwip/include/lwip/udp.h@0:10bcaa7c2253, 2010-10-26 (annotated)
- Committer:
- okini3939
- Date:
- Tue Oct 26 17:19:28 2010 +0000
- Revision:
- 0:10bcaa7c2253
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| okini3939 | 0:10bcaa7c2253 | 1 | /* |
| okini3939 | 0:10bcaa7c2253 | 2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| okini3939 | 0:10bcaa7c2253 | 3 | * All rights reserved. |
| okini3939 | 0:10bcaa7c2253 | 4 | * |
| okini3939 | 0:10bcaa7c2253 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
| okini3939 | 0:10bcaa7c2253 | 6 | * are permitted provided that the following conditions are met: |
| okini3939 | 0:10bcaa7c2253 | 7 | * |
| okini3939 | 0:10bcaa7c2253 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| okini3939 | 0:10bcaa7c2253 | 9 | * this list of conditions and the following disclaimer. |
| okini3939 | 0:10bcaa7c2253 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| okini3939 | 0:10bcaa7c2253 | 11 | * this list of conditions and the following disclaimer in the documentation |
| okini3939 | 0:10bcaa7c2253 | 12 | * and/or other materials provided with the distribution. |
| okini3939 | 0:10bcaa7c2253 | 13 | * 3. The name of the author may not be used to endorse or promote products |
| okini3939 | 0:10bcaa7c2253 | 14 | * derived from this software without specific prior written permission. |
| okini3939 | 0:10bcaa7c2253 | 15 | * |
| okini3939 | 0:10bcaa7c2253 | 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| okini3939 | 0:10bcaa7c2253 | 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| okini3939 | 0:10bcaa7c2253 | 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| okini3939 | 0:10bcaa7c2253 | 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| okini3939 | 0:10bcaa7c2253 | 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| okini3939 | 0:10bcaa7c2253 | 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| okini3939 | 0:10bcaa7c2253 | 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| okini3939 | 0:10bcaa7c2253 | 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| okini3939 | 0:10bcaa7c2253 | 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| okini3939 | 0:10bcaa7c2253 | 25 | * OF SUCH DAMAGE. |
| okini3939 | 0:10bcaa7c2253 | 26 | * |
| okini3939 | 0:10bcaa7c2253 | 27 | * This file is part of the lwIP TCP/IP stack. |
| okini3939 | 0:10bcaa7c2253 | 28 | * |
| okini3939 | 0:10bcaa7c2253 | 29 | * Author: Adam Dunkels <adam@sics.se> |
| okini3939 | 0:10bcaa7c2253 | 30 | * |
| okini3939 | 0:10bcaa7c2253 | 31 | */ |
| okini3939 | 0:10bcaa7c2253 | 32 | #ifndef __LWIP_UDP_H__ |
| okini3939 | 0:10bcaa7c2253 | 33 | #define __LWIP_UDP_H__ |
| okini3939 | 0:10bcaa7c2253 | 34 | |
| okini3939 | 0:10bcaa7c2253 | 35 | #include "lwip/opt.h" |
| okini3939 | 0:10bcaa7c2253 | 36 | |
| okini3939 | 0:10bcaa7c2253 | 37 | #if LWIP_UDP /* don't build if not configured for use in lwipopts.h */ |
| okini3939 | 0:10bcaa7c2253 | 38 | |
| okini3939 | 0:10bcaa7c2253 | 39 | #include "lwip/pbuf.h" |
| okini3939 | 0:10bcaa7c2253 | 40 | #include "lwip/netif.h" |
| okini3939 | 0:10bcaa7c2253 | 41 | #include "lwip/ip_addr.h" |
| okini3939 | 0:10bcaa7c2253 | 42 | #include "lwip/ip.h" |
| okini3939 | 0:10bcaa7c2253 | 43 | |
| okini3939 | 0:10bcaa7c2253 | 44 | #ifdef __cplusplus |
| okini3939 | 0:10bcaa7c2253 | 45 | extern "C" { |
| okini3939 | 0:10bcaa7c2253 | 46 | #endif |
| okini3939 | 0:10bcaa7c2253 | 47 | |
| okini3939 | 0:10bcaa7c2253 | 48 | #define UDP_HLEN 8 |
| okini3939 | 0:10bcaa7c2253 | 49 | |
| okini3939 | 0:10bcaa7c2253 | 50 | /* Fields are (of course) in network byte order. */ |
| okini3939 | 0:10bcaa7c2253 | 51 | #ifdef PACK_STRUCT_USE_INCLUDES |
| okini3939 | 0:10bcaa7c2253 | 52 | # include "arch/bpstruct.h" |
| okini3939 | 0:10bcaa7c2253 | 53 | #endif |
| okini3939 | 0:10bcaa7c2253 | 54 | PACK_STRUCT_BEGIN |
| okini3939 | 0:10bcaa7c2253 | 55 | struct udp_hdr { |
| okini3939 | 0:10bcaa7c2253 | 56 | PACK_STRUCT_FIELD(u16_t src); |
| okini3939 | 0:10bcaa7c2253 | 57 | PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */ |
| okini3939 | 0:10bcaa7c2253 | 58 | PACK_STRUCT_FIELD(u16_t len); |
| okini3939 | 0:10bcaa7c2253 | 59 | PACK_STRUCT_FIELD(u16_t chksum); |
| okini3939 | 0:10bcaa7c2253 | 60 | } PACK_STRUCT_STRUCT; |
| okini3939 | 0:10bcaa7c2253 | 61 | PACK_STRUCT_END |
| okini3939 | 0:10bcaa7c2253 | 62 | #ifdef PACK_STRUCT_USE_INCLUDES |
| okini3939 | 0:10bcaa7c2253 | 63 | # include "arch/epstruct.h" |
| okini3939 | 0:10bcaa7c2253 | 64 | #endif |
| okini3939 | 0:10bcaa7c2253 | 65 | |
| okini3939 | 0:10bcaa7c2253 | 66 | #define UDP_FLAGS_NOCHKSUM 0x01U |
| okini3939 | 0:10bcaa7c2253 | 67 | #define UDP_FLAGS_UDPLITE 0x02U |
| okini3939 | 0:10bcaa7c2253 | 68 | #define UDP_FLAGS_CONNECTED 0x04U |
| okini3939 | 0:10bcaa7c2253 | 69 | #define UDP_FLAGS_MULTICAST_LOOP 0x08U |
| okini3939 | 0:10bcaa7c2253 | 70 | |
| okini3939 | 0:10bcaa7c2253 | 71 | struct udp_pcb; |
| okini3939 | 0:10bcaa7c2253 | 72 | |
| okini3939 | 0:10bcaa7c2253 | 73 | /** Function prototype for udp pcb receive callback functions |
| okini3939 | 0:10bcaa7c2253 | 74 | * addr and port are in same byte order as in the pcb |
| okini3939 | 0:10bcaa7c2253 | 75 | * The callback is responsible for freeing the pbuf |
| okini3939 | 0:10bcaa7c2253 | 76 | * if it's not used any more. |
| okini3939 | 0:10bcaa7c2253 | 77 | * |
| okini3939 | 0:10bcaa7c2253 | 78 | * ATTENTION: Be aware that 'addr' points into the pbuf 'p' so freeing this pbuf |
| okini3939 | 0:10bcaa7c2253 | 79 | * makes 'addr' invalid, too. |
| okini3939 | 0:10bcaa7c2253 | 80 | * |
| okini3939 | 0:10bcaa7c2253 | 81 | * @param arg user supplied argument (udp_pcb.recv_arg) |
| okini3939 | 0:10bcaa7c2253 | 82 | * @param pcb the udp_pcb which received data |
| okini3939 | 0:10bcaa7c2253 | 83 | * @param p the packet buffer that was received |
| okini3939 | 0:10bcaa7c2253 | 84 | * @param addr the remote IP address from which the packet was received |
| okini3939 | 0:10bcaa7c2253 | 85 | * @param port the remote port from which the packet was received |
| okini3939 | 0:10bcaa7c2253 | 86 | */ |
| okini3939 | 0:10bcaa7c2253 | 87 | typedef void (*udp_recv_fn)(void *arg, struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 88 | ip_addr_t *addr, u16_t port); |
| okini3939 | 0:10bcaa7c2253 | 89 | |
| okini3939 | 0:10bcaa7c2253 | 90 | |
| okini3939 | 0:10bcaa7c2253 | 91 | struct udp_pcb { |
| okini3939 | 0:10bcaa7c2253 | 92 | /* Common members of all PCB types */ |
| okini3939 | 0:10bcaa7c2253 | 93 | IP_PCB; |
| okini3939 | 0:10bcaa7c2253 | 94 | |
| okini3939 | 0:10bcaa7c2253 | 95 | /* Protocol specific PCB members */ |
| okini3939 | 0:10bcaa7c2253 | 96 | |
| okini3939 | 0:10bcaa7c2253 | 97 | struct udp_pcb *next; |
| okini3939 | 0:10bcaa7c2253 | 98 | |
| okini3939 | 0:10bcaa7c2253 | 99 | u8_t flags; |
| okini3939 | 0:10bcaa7c2253 | 100 | /** ports are in host byte order */ |
| okini3939 | 0:10bcaa7c2253 | 101 | u16_t local_port, remote_port; |
| okini3939 | 0:10bcaa7c2253 | 102 | |
| okini3939 | 0:10bcaa7c2253 | 103 | #if LWIP_IGMP |
| okini3939 | 0:10bcaa7c2253 | 104 | /** outgoing network interface for multicast packets */ |
| okini3939 | 0:10bcaa7c2253 | 105 | ip_addr_t multicast_ip; |
| okini3939 | 0:10bcaa7c2253 | 106 | #endif /* LWIP_IGMP */ |
| okini3939 | 0:10bcaa7c2253 | 107 | |
| okini3939 | 0:10bcaa7c2253 | 108 | #if LWIP_UDPLITE |
| okini3939 | 0:10bcaa7c2253 | 109 | /** used for UDP_LITE only */ |
| okini3939 | 0:10bcaa7c2253 | 110 | u16_t chksum_len_rx, chksum_len_tx; |
| okini3939 | 0:10bcaa7c2253 | 111 | #endif /* LWIP_UDPLITE */ |
| okini3939 | 0:10bcaa7c2253 | 112 | |
| okini3939 | 0:10bcaa7c2253 | 113 | /** receive callback function */ |
| okini3939 | 0:10bcaa7c2253 | 114 | udp_recv_fn recv; |
| okini3939 | 0:10bcaa7c2253 | 115 | /** user-supplied argument for the recv callback */ |
| okini3939 | 0:10bcaa7c2253 | 116 | void *recv_arg; |
| okini3939 | 0:10bcaa7c2253 | 117 | }; |
| okini3939 | 0:10bcaa7c2253 | 118 | /* udp_pcbs export for exernal reference (e.g. SNMP agent) */ |
| okini3939 | 0:10bcaa7c2253 | 119 | extern struct udp_pcb *udp_pcbs; |
| okini3939 | 0:10bcaa7c2253 | 120 | |
| okini3939 | 0:10bcaa7c2253 | 121 | /* The following functions is the application layer interface to the |
| okini3939 | 0:10bcaa7c2253 | 122 | UDP code. */ |
| okini3939 | 0:10bcaa7c2253 | 123 | struct udp_pcb * udp_new (void); |
| okini3939 | 0:10bcaa7c2253 | 124 | void udp_remove (struct udp_pcb *pcb); |
| okini3939 | 0:10bcaa7c2253 | 125 | err_t udp_bind (struct udp_pcb *pcb, ip_addr_t *ipaddr, |
| okini3939 | 0:10bcaa7c2253 | 126 | u16_t port); |
| okini3939 | 0:10bcaa7c2253 | 127 | err_t udp_connect (struct udp_pcb *pcb, ip_addr_t *ipaddr, |
| okini3939 | 0:10bcaa7c2253 | 128 | u16_t port); |
| okini3939 | 0:10bcaa7c2253 | 129 | void udp_disconnect (struct udp_pcb *pcb); |
| okini3939 | 0:10bcaa7c2253 | 130 | void udp_recv (struct udp_pcb *pcb, udp_recv_fn recv, |
| okini3939 | 0:10bcaa7c2253 | 131 | void *recv_arg); |
| okini3939 | 0:10bcaa7c2253 | 132 | err_t udp_sendto_if (struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 133 | ip_addr_t *dst_ip, u16_t dst_port, |
| okini3939 | 0:10bcaa7c2253 | 134 | struct netif *netif); |
| okini3939 | 0:10bcaa7c2253 | 135 | err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 136 | ip_addr_t *dst_ip, u16_t dst_port); |
| okini3939 | 0:10bcaa7c2253 | 137 | err_t udp_send (struct udp_pcb *pcb, struct pbuf *p); |
| okini3939 | 0:10bcaa7c2253 | 138 | |
| okini3939 | 0:10bcaa7c2253 | 139 | #if LWIP_CHECKSUM_ON_COPY |
| okini3939 | 0:10bcaa7c2253 | 140 | err_t udp_sendto_if_chksum(struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 141 | ip_addr_t *dst_ip, u16_t dst_port, |
| okini3939 | 0:10bcaa7c2253 | 142 | struct netif *netif, u8_t have_chksum, |
| okini3939 | 0:10bcaa7c2253 | 143 | u16_t chksum); |
| okini3939 | 0:10bcaa7c2253 | 144 | err_t udp_sendto_chksum(struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 145 | ip_addr_t *dst_ip, u16_t dst_port, |
| okini3939 | 0:10bcaa7c2253 | 146 | u8_t have_chksum, u16_t chksum); |
| okini3939 | 0:10bcaa7c2253 | 147 | err_t udp_send_chksum(struct udp_pcb *pcb, struct pbuf *p, |
| okini3939 | 0:10bcaa7c2253 | 148 | u8_t have_chksum, u16_t chksum); |
| okini3939 | 0:10bcaa7c2253 | 149 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
| okini3939 | 0:10bcaa7c2253 | 150 | |
| okini3939 | 0:10bcaa7c2253 | 151 | #define udp_flags(pcb) ((pcb)->flags) |
| okini3939 | 0:10bcaa7c2253 | 152 | #define udp_setflags(pcb, f) ((pcb)->flags = (f)) |
| okini3939 | 0:10bcaa7c2253 | 153 | |
| okini3939 | 0:10bcaa7c2253 | 154 | /* The following functions are the lower layer interface to UDP. */ |
| okini3939 | 0:10bcaa7c2253 | 155 | void udp_input (struct pbuf *p, struct netif *inp); |
| okini3939 | 0:10bcaa7c2253 | 156 | |
| okini3939 | 0:10bcaa7c2253 | 157 | #define udp_init() /* Compatibility define, not init needed. */ |
| okini3939 | 0:10bcaa7c2253 | 158 | |
| okini3939 | 0:10bcaa7c2253 | 159 | #if UDP_DEBUG |
| okini3939 | 0:10bcaa7c2253 | 160 | void udp_debug_print(struct udp_hdr *udphdr); |
| okini3939 | 0:10bcaa7c2253 | 161 | #else |
| okini3939 | 0:10bcaa7c2253 | 162 | #define udp_debug_print(udphdr) |
| okini3939 | 0:10bcaa7c2253 | 163 | #endif |
| okini3939 | 0:10bcaa7c2253 | 164 | |
| okini3939 | 0:10bcaa7c2253 | 165 | #ifdef __cplusplus |
| okini3939 | 0:10bcaa7c2253 | 166 | } |
| okini3939 | 0:10bcaa7c2253 | 167 | #endif |
| okini3939 | 0:10bcaa7c2253 | 168 | |
| okini3939 | 0:10bcaa7c2253 | 169 | #endif /* LWIP_UDP */ |
| okini3939 | 0:10bcaa7c2253 | 170 | |
| okini3939 | 0:10bcaa7c2253 | 171 | #endif /* __LWIP_UDP_H__ */ |