c3a234fe99
Previously ipv6 multi-address support decided packet source address based on its destination. This doesn't work if NuttX device has multiple addresses within same subnet. Instead when a packet is a response to existing connection, the source address should be based on the destination address used in the received packet.
251 lines
7.5 KiB
C
251 lines
7.5 KiB
C
/****************************************************************************
|
|
* net/udp/udp_send.c
|
|
*
|
|
* Copyright (C) 2007-2009, 2011, 2015 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 <string.h>
|
|
#include <debug.h>
|
|
#include <assert.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
#include <nuttx/net/netconfig.h>
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/netstats.h>
|
|
#include <nuttx/net/ip.h>
|
|
#include <nuttx/net/udp.h>
|
|
|
|
#include "devif/devif.h"
|
|
#include "inet/inet.h"
|
|
#include "utils/utils.h"
|
|
#include "udp/udp.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: udp_send
|
|
*
|
|
* Description:
|
|
* Set-up to send a UDP packet
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The UDP "connection" structure holding port information
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void udp_send(FAR struct net_driver_s *dev, FAR struct udp_conn_s *conn)
|
|
{
|
|
FAR struct udp_hdr_s *udp;
|
|
#ifdef CONFIG_NET_IPv4
|
|
in_addr_t raddr;
|
|
#endif
|
|
|
|
ninfo("UDP payload: %d (%d) bytes\n", dev->d_sndlen, dev->d_len);
|
|
|
|
if (dev->d_sndlen > 0)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (conn->domain == PF_INET ||
|
|
(conn->domain == PF_INET6 &&
|
|
ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr)))
|
|
#endif
|
|
{
|
|
DEBUGASSERT(IFF_IS_IPv4(dev->d_flags));
|
|
udp = UDPIPv4BUF;
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (conn->domain == PF_INET6 &&
|
|
ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr))
|
|
{
|
|
raddr = ip6_get_ipv4addr(conn->u.ipv6.raddr);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
raddr = conn->u.ipv4.raddr;
|
|
}
|
|
|
|
/* The total length to send is the size of the application data
|
|
* plus the IPv4 and UDP headers (and, eventually, the link layer
|
|
* header)
|
|
*/
|
|
|
|
dev->d_len = dev->d_sndlen + IPv4UDP_HDRLEN;
|
|
|
|
ipv4_build_header(IPv4BUF, dev->d_len, IP_PROTO_UDP,
|
|
&dev->d_ipaddr, &raddr, conn->sconn.ttl,
|
|
conn->sconn.s_tos, NULL);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.ipv4.sent++;
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_NET_IPv4 */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
#ifdef CONFIG_NET_IPv4
|
|
else
|
|
#endif
|
|
{
|
|
/* Get pointers to the IPv6 header and the offset UDP header */
|
|
|
|
DEBUGASSERT(IFF_IS_IPv6(dev->d_flags));
|
|
udp = UDPIPv6BUF;
|
|
|
|
/* The IPv6 length, Includes the UDP header size but not the IPv6
|
|
* header size
|
|
*/
|
|
|
|
dev->d_len = dev->d_sndlen + UDP_HDRLEN;
|
|
|
|
ipv6_build_header(IPv6BUF, dev->d_len, IP_PROTO_UDP,
|
|
netdev_ipv6_srcaddr(dev, conn->u.ipv6.laddr),
|
|
conn->u.ipv6.raddr,
|
|
conn->sconn.ttl, conn->sconn.s_tclass);
|
|
|
|
/* The total length to send is the size of the application data
|
|
* plus the IPv6 and UDP headers (and, eventually, the link layer
|
|
* header)
|
|
*/
|
|
|
|
dev->d_len += IPv6_HDRLEN;
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.ipv6.sent++;
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_NET_IPv6 */
|
|
|
|
/* Initialize the UDP header */
|
|
|
|
udp->srcport = conn->lport;
|
|
udp->destport = conn->rport;
|
|
udp->udplen = HTONS(dev->d_sndlen + UDP_HDRLEN);
|
|
udp->udpchksum = 0;
|
|
|
|
/* Update the device buffer length */
|
|
|
|
iob_update_pktlen(dev->d_iob, dev->d_len, false);
|
|
|
|
#ifdef CONFIG_NET_UDP_CHECKSUMS
|
|
/* Calculate UDP checksum. */
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (conn->domain == PF_INET ||
|
|
(conn->domain == PF_INET6 &&
|
|
ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr)))
|
|
#endif
|
|
{
|
|
udp->udpchksum = ~udp_ipv4_chksum(dev);
|
|
}
|
|
#endif /* CONFIG_NET_IPv4 */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
#ifdef CONFIG_NET_IPv4
|
|
else
|
|
#endif
|
|
{
|
|
udp->udpchksum = ~udp_ipv6_chksum(dev);
|
|
}
|
|
#endif /* CONFIG_NET_IPv6 */
|
|
|
|
if (udp->udpchksum == 0)
|
|
{
|
|
udp->udpchksum = 0xffff;
|
|
}
|
|
#endif /* CONFIG_NET_UDP_CHECKSUMS */
|
|
|
|
ninfo("Outgoing UDP packet length: %d\n", dev->d_len);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.udp.sent++;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: udpip_hdrsize
|
|
*
|
|
* Description:
|
|
* Get the total size of L3 and L4 UDP header
|
|
*
|
|
* Input Parameters:
|
|
* conn The connection structure associated with the socket
|
|
*
|
|
* Returned Value:
|
|
* the total size of L3 and L4 TCP header
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint16_t udpip_hdrsize(FAR struct udp_conn_s *conn)
|
|
{
|
|
uint16_t hdrsize = sizeof(struct udp_hdr_s);
|
|
|
|
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
|
|
if (conn->domain == PF_INET6 &&
|
|
ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr))
|
|
{
|
|
/* Select the IPv4 domain for hybrid dual-stack IPv6/IPv4 socket */
|
|
|
|
return sizeof(struct ipv4_hdr_s) + hdrsize;
|
|
}
|
|
#endif
|
|
|
|
UNUSED(conn);
|
|
return net_ip_domain_select(conn->domain,
|
|
sizeof(struct ipv4_hdr_s) + hdrsize,
|
|
sizeof(struct ipv6_hdr_s) + hdrsize);
|
|
}
|
|
#endif /* CONFIG_NET && CONFIG_NET_UDP */
|