diff options
Diffstat (limited to 'nuttx/net/uip/uip_udpsend.c')
| -rw-r--r-- | nuttx/net/uip/uip_udpsend.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/nuttx/net/uip/uip_udpsend.c b/nuttx/net/uip/uip_udpsend.c new file mode 100644 index 000000000..9e6a95a38 --- /dev/null +++ b/nuttx/net/uip/uip_udpsend.c @@ -0,0 +1,176 @@ +/**************************************************************************** + * net/uip/uip_udpsend.c + * + * Copyright (C) 2007, 2008 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; + + uiphdr_ipaddr_copy(UDPBUF->srcipaddr, &dev->d_ipaddr); + uiphdr_ipaddr_copy(UDPBUF->destipaddr, &conn->ripaddr); + + /* Calculate IP checksum. */ + + UDPBUF->ipchksum = 0; + UDPBUF->ipchksum = ~(uip_ipchksum(dev)); + +#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 = 0; + UDPBUF->udpchksum = ~(uip_udpchksum(dev)); + if (UDPBUF->udpchksum == 0) + { + UDPBUF->udpchksum = 0xffff; + } +#else + UDPBUF->udpchksum = 0; +#endif + + nvdbg("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 */ |