Contiki-NG
uip-udp-packet.c
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1 /*
2  * Copyright (c) 2006, Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  */
32 
33 /**
34  * \file
35  * Module for sending UDP packets through uIP.
36  * \author
37  * Adam Dunkels <adam@sics.se>
38  */
39 
40 #include "contiki.h"
41 
42 extern uint16_t uip_slen;
43 
46 
47 #include <string.h>
48 
49 /*---------------------------------------------------------------------------*/
50 void
51 uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len)
52 {
53 #if UIP_UDP
54  if(data != NULL && len <= (UIP_BUFSIZE - UIP_IPUDPH_LEN)) {
55  uip_udp_conn = c;
56  uip_slen = len;
57  memmove(&uip_buf[UIP_IPUDPH_LEN], data, len);
58  uip_process(UIP_UDP_SEND_CONN);
59 
60 #if UIP_IPV6_MULTICAST
61  /* Let the multicast engine process the datagram before we send it */
63  UIP_MCAST6.out();
64  }
65 #endif /* UIP_IPV6_MULTICAST */
66 
67 #if NETSTACK_CONF_WITH_IPV6
69 #else
70  if(uip_len > 0) {
71  tcpip_output();
72  }
73 #endif
74  }
75  uip_slen = 0;
76 #endif /* UIP_UDP */
77 }
78 /*---------------------------------------------------------------------------*/
79 void
80 uip_udp_packet_sendto(struct uip_udp_conn *c, const void *data, int len,
81  const uip_ipaddr_t *toaddr, uint16_t toport)
82 {
83  uip_ipaddr_t curaddr;
84  uint16_t curport;
85 
86  if(toaddr != NULL) {
87  /* Save current IP addr/port. */
88  uip_ipaddr_copy(&curaddr, &c->ripaddr);
89  curport = c->rport;
90 
91  /* Load new IP addr/port */
92  uip_ipaddr_copy(&c->ripaddr, toaddr);
93  c->rport = toport;
94 
95  uip_udp_packet_send(c, data, len);
96 
97  /* Restore old IP addr/port */
98  uip_ipaddr_copy(&c->ripaddr, &curaddr);
99  c->rport = curport;
100  }
101 }
102 /*---------------------------------------------------------------------------*/
uint8_t tcpip_output(const uip_lladdr_t *a)
Output packet to layer 2 The eventual parameter is the MAC address of the destination.
Definition: tcpip.c:106
#define uip_is_addr_mcast_routable(a)
is address a routable multicast address.
Definition: uip.h:1989
uint16_t uip_len
The length of the packet in the uip_buf buffer.
Definition: uip6.c:159
void tcpip_ipv6_output(void)
This function does address resolution and then calls tcpip_output.
Definition: tcpip.c:631
void uip_process(uint8_t flag)
process the options within a hop by hop or destination option header
Definition: uip6.c:948
#define UIP_BUFSIZE
The size of the uIP packet buffer.
Definition: uipopt.h:134
Header file for module for sending UDP packets through uIP.
This header file contains configuration directives for uIPv6 multicast support.
#define uip_buf
Macro to access uip_aligned_buf as an array of bytes.
Definition: uip.h:510
#define uip_ipaddr_copy(dest, src)
Copy an IP address from one place to another.
Definition: uip.h:1015
void(* out)(void)
Process an outgoing datagram with a multicast IPv6 destination address.
Definition: uip-mcast6.h:121
uip_ipaddr_t ripaddr
The IP address of the remote peer.
Definition: uip.h:1376
uint16_t rport
The remote port number in network byte order.
Definition: uip.h:1378
Representation of a uIP UDP connection.
Definition: uip.h:1375