| /**************************************************************************** |
| * net/uip/uip-udpsend.c |
| * |
| * Copyright (C) 2007 Gregory Nutt. All rights reserved. |
| * Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
| * |
| * Adapted for NuttX from logic in uIP which also has a BSD-like license: |
| * |
| * Original author Adam Dunkels <adam@dunkels.com> |
| * Copyright () 2001-2003, Adam Dunkels. |
| * 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. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| #if defined(CONFIG_NET) && defined(CONFIG_NET_UDP) |
| |
| #include <sys/types.h> |
| #include <debug.h> |
| |
| #include <net/uip/uipopt.h> |
| #include <net/uip/uip.h> |
| #include <net/uip/uip-arch.h> |
| |
| #include "uip-internal.h" |
| |
| /**************************************************************************** |
| * Definitions |
| ****************************************************************************/ |
| |
| #define UDPBUF ((struct uip_udpip_hdr *)&dev->d_buf[UIP_LLH_LEN]) |
| |
| /**************************************************************************** |
| * Public Variables |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Variables |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: uip_udpsend |
| * |
| * Description: |
| * Setup to send a UDP packet |
| * |
| * Parameters: |
| * dev - The device driver structure to use in the send operation |
| * conn - The UDP "connection" structure holding port information |
| * |
| * Return: |
| * None |
| * |
| * Assumptions: |
| * Called from the interrupt level or with interrupts disabled. |
| * |
| ****************************************************************************/ |
| |
| void uip_udpsend(struct uip_driver_s *dev, struct uip_udp_conn *conn) |
| { |
| if (dev->d_sndlen == 0) |
| { |
| /* The total lenth to send is the size of the application data plus |
| * the IP and UDP headers (and, eventually, the ethernet header) |
| */ |
| |
| dev->d_len = dev->d_sndlen + UIP_IPUDPH_LEN; |
| |
| /* Initialize the IP header. Note that for IPv6, the IP length field |
| * does not include the IPv6 IP header length. |
| */ |
| |
| #ifdef CONFIG_NET_IPv6 |
| |
| UDPBUF->vtc = 0x60; |
| UDPBUF->tcf = 0x00; |
| UDPBUF->flow = 0x00; |
| UDPBUF->len[0] = (dev->d_sndlen >> 8); |
| UDPBUF->len[1] = (dev->d_sndlen & 0xff); |
| UDPBUF->nexthdr = UIP_PROTO_UDP; |
| UDPBUF->hoplimit = conn->ttl; |
| |
| uip_ipaddr_copy(UDPBUF->srcipaddr, &dev->d_ipaddr); |
| uip_ipaddr_copy(UDPBUF->destipaddr, &conn->ripaddr); |
| |
| #else /* CONFIG_NET_IPv6 */ |
| |
| UDPBUF->vhl = 0x45; |
| UDPBUF->tos = 0; |
| UDPBUF->len[0] = (dev->d_len >> 8); |
| UDPBUF->len[1] = (dev->d_len & 0xff); |
| ++g_ipid; |
| UDPBUF->ipid[0] = g_ipid >> 8; |
| UDPBUF->ipid[1] = g_ipid & 0xff; |
| UDPBUF->ipoffset[0] = 0; |
| UDPBUF->ipoffset[1] = 0; |
| UDPBUF->ttl = conn->ttl; |
| UDPBUF->proto = UIP_PROTO_UDP; |
| |
| /* Calculate IP checksum. */ |
| |
| UDPBUF->ipchksum = 0; |
| UDPBUF->ipchksum = ~(uip_ipchksum(dev)); |
| |
| uiphdr_ipaddr_copy(UDPBUF->srcipaddr, &dev->d_ipaddr); |
| uiphdr_ipaddr_copy(UDPBUF->destipaddr, &conn->ripaddr); |
| |
| #endif /* CONFIG_NET_IPv6 */ |
| |
| /* Initialize the UDP header */ |
| |
| UDPBUF->srcport = conn->lport; |
| UDPBUF->destport = conn->rport; |
| UDPBUF->udplen = HTONS(dev->d_sndlen + UIP_UDPH_LEN); |
| |
| #ifdef CONFIG_NET_UDP_CHECKSUMS |
| /* Calculate UDP checksum. */ |
| |
| UDPBUF->udpchksum = ~(uip_udpchksum(dev)); |
| if (UDPBUF->udpchksum == 0) |
| { |
| UDPBUF->udpchksum = 0xffff; |
| } |
| #else |
| UDPBUF->udpchksum = 0; |
| #endif |
| |
| vdbg("Outgoing UDP packet length: %d (%d)\n", |
| dev->d_len, (UDPBUF->len[0] << 8) | UDPBUF->len[1]); |
| |
| #ifdef CONFIG_NET_STATISTICS |
| uip_stat.udp.sent++; |
| uip_stat.ip.sent++; |
| #endif |
| } |
| } |
| |
| #endif /* CONFIG_NET && CONFIG_NET_UDP */ |