2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
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.
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
27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
32 #ifndef __LWIP_UDP_H__
33 #define __LWIP_UDP_H__
37 #if LWIP_UDP /* don't build if not configured for use in lwipopts.h */
39 #include "lwip/pbuf.h"
40 #include "lwip/netif.h"
41 #include "lwip/ip_addr.h"
43 #include "lwip/ip6_addr.h"
51 /* Fields are (of course) in network byte order. */
52 #ifdef PACK_STRUCT_USE_INCLUDES
53 # include "arch/bpstruct.h"
57 PACK_STRUCT_FIELD(u16_t src);
58 PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */
59 PACK_STRUCT_FIELD(u16_t len);
60 PACK_STRUCT_FIELD(u16_t chksum);
63 #ifdef PACK_STRUCT_USE_INCLUDES
64 # include "arch/epstruct.h"
67 #define UDP_FLAGS_NOCHKSUM 0x01U
68 #define UDP_FLAGS_UDPLITE 0x02U
69 #define UDP_FLAGS_CONNECTED 0x04U
70 #define UDP_FLAGS_MULTICAST_LOOP 0x08U
74 /** Function prototype for udp pcb receive callback functions
75 * addr and port are in same byte order as in the pcb
76 * The callback is responsible for freeing the pbuf
77 * if it's not used any more.
79 * ATTENTION: Be aware that 'addr' points into the pbuf 'p' so freeing this pbuf
80 * makes 'addr' invalid, too.
82 * @param arg user supplied argument (udp_pcb.recv_arg)
83 * @param pcb the udp_pcb which received data
84 * @param p the packet buffer that was received
85 * @param addr the remote IP address from which the packet was received
86 * @param port the remote port from which the packet was received
88 typedef void (*udp_recv_fn)(void *arg, struct udp_pcb *pcb, struct pbuf *p,
89 ip_addr_t *addr, u16_t port);
92 /** Function prototype for udp pcb IPv6 receive callback functions
93 * The callback is responsible for freeing the pbuf
94 * if it's not used any more.
96 * @param arg user supplied argument (udp_pcb.recv_arg)
97 * @param pcb the udp_pcb which received data
98 * @param p the packet buffer that was received
99 * @param addr the remote IPv6 address from which the packet was received
100 * @param port the remote port from which the packet was received
102 typedef void (*udp_recv_ip6_fn)(void *arg, struct udp_pcb *pcb, struct pbuf *p,
103 ip6_addr_t *addr, u16_t port);
104 #endif /* LWIP_IPV6 */
107 #define UDP_PCB_RECV_IP6 udp_recv_ip6_fn ip6;
109 #define UDP_PCB_RECV_IP6
110 #endif /* LWIP_IPV6 */
113 /* Common members of all PCB types */
116 /* Protocol specific PCB members */
118 struct udp_pcb *next;
121 /** ports are in host byte order */
122 u16_t local_port, remote_port;
125 /** outgoing network interface for multicast packets */
126 ip_addr_t multicast_ip;
127 #endif /* LWIP_IGMP */
130 /** used for UDP_LITE only */
131 u16_t chksum_len_rx, chksum_len_tx;
132 #endif /* LWIP_UDPLITE */
134 /** receive callback function */
139 /** user-supplied argument for the recv callback */
142 /* udp_pcbs export for exernal reference (e.g. SNMP agent) */
143 extern struct udp_pcb *udp_pcbs;
145 /* The following functions is the application layer interface to the
147 struct udp_pcb * udp_new (void);
148 void udp_remove (struct udp_pcb *pcb);
149 err_t udp_bind (struct udp_pcb *pcb, ip_addr_t *ipaddr,
151 err_t udp_connect (struct udp_pcb *pcb, ip_addr_t *ipaddr,
153 void udp_disconnect (struct udp_pcb *pcb);
154 void udp_recv (struct udp_pcb *pcb, udp_recv_fn recv,
156 err_t udp_sendto_if (struct udp_pcb *pcb, struct pbuf *p,
157 ip_addr_t *dst_ip, u16_t dst_port,
158 struct netif *netif);
159 err_t udp_sendto (struct udp_pcb *pcb, struct pbuf *p,
160 ip_addr_t *dst_ip, u16_t dst_port);
161 err_t udp_send (struct udp_pcb *pcb, struct pbuf *p);
163 #if LWIP_CHECKSUM_ON_COPY
164 err_t udp_sendto_if_chksum(struct udp_pcb *pcb, struct pbuf *p,
165 ip_addr_t *dst_ip, u16_t dst_port,
166 struct netif *netif, u8_t have_chksum,
168 err_t udp_sendto_chksum(struct udp_pcb *pcb, struct pbuf *p,
169 ip_addr_t *dst_ip, u16_t dst_port,
170 u8_t have_chksum, u16_t chksum);
171 err_t udp_send_chksum(struct udp_pcb *pcb, struct pbuf *p,
172 u8_t have_chksum, u16_t chksum);
173 #endif /* LWIP_CHECKSUM_ON_COPY */
175 #define udp_flags(pcb) ((pcb)->flags)
176 #define udp_setflags(pcb, f) ((pcb)->flags = (f))
178 /* The following functions are the lower layer interface to UDP. */
179 void udp_input (struct pbuf *p, struct netif *inp);
181 void udp_init (void);
184 struct udp_pcb * udp_new_ip6(void);
185 #define udp_bind_ip6(pcb, ip6addr, port) \
186 udp_bind(pcb, ip6_2_ip(ip6addr), port)
187 #define udp_connect_ip6(pcb, ip6addr, port) \
188 udp_connect(pcb, ip6_2_ip(ip6addr), port)
189 #define udp_recv_ip6(pcb, recv_ip6_fn, recv_arg) \
190 udp_recv(pcb, (udp_recv_fn)recv_ip6_fn, recv_arg)
191 #define udp_sendto_ip6(pcb, pbuf, ip6addr, port) \
192 udp_sendto(pcb, pbuf, ip6_2_ip(ip6addr), port)
193 #define udp_sendto_if_ip6(pcb, pbuf, ip6addr, port, netif) \
194 udp_sendto_if(pcb, pbuf, ip6_2_ip(ip6addr), port, netif)
195 #if LWIP_CHECKSUM_ON_COPY
196 #define udp_sendto_chksum_ip6(pcb, pbuf, ip6addr, port, have_chk, chksum) \
197 udp_sendto_chksum(pcb, pbuf, ip6_2_ip(ip6addr), port, have_chk, chksum)
198 #define udp_sendto_if_chksum_ip6(pcb, pbuf, ip6addr, port, netif, have_chk, chksum) \
199 udp_sendto_if_chksum(pcb, pbuf, ip6_2_ip(ip6addr), port, netif, have_chk, chksum)
200 #endif /*LWIP_CHECKSUM_ON_COPY */
201 #endif /* LWIP_IPV6 */
204 void udp_debug_print(struct udp_hdr *udphdr);
206 #define udp_debug_print(udphdr)
213 #endif /* LWIP_UDP */
215 #endif /* __LWIP_UDP_H__ */