2b9633e652
Note that user-space related code, like procfs and lifreq related ioctl commands, are not touched in this commit. Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
251 lines
7.5 KiB
C
251 lines
7.5 KiB
C
/****************************************************************************
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* net/udp/udp_send.c
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*
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* Copyright (C) 2007-2009, 2011, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted for NuttX from logic in uIP which also has a BSD-like license:
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*
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* Original author Adam Dunkels <adam@dunkels.com>
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* Copyright () 2001-2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#if defined(CONFIG_NET) && defined(CONFIG_NET_UDP)
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#include <string.h>
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#include <debug.h>
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#include <assert.h>
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#include <arpa/inet.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/netstats.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/net/udp.h>
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#include "devif/devif.h"
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#include "inet/inet.h"
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#include "utils/utils.h"
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#include "udp/udp.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: udp_send
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*
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* Description:
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* Set-up to send a UDP packet
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*
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* Input Parameters:
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* dev - The device driver structure to use in the send operation
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* conn - The UDP "connection" structure holding port information
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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void udp_send(FAR struct net_driver_s *dev, FAR struct udp_conn_s *conn)
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{
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FAR struct udp_hdr_s *udp;
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#ifdef CONFIG_NET_IPv4
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in_addr_t raddr;
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#endif
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ninfo("UDP payload: %d (%d) bytes\n", dev->d_sndlen, dev->d_len);
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if (dev->d_sndlen > 0)
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{
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#ifdef CONFIG_NET_IPv4
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#ifdef CONFIG_NET_IPv6
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if (conn->domain == PF_INET ||
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(conn->domain == PF_INET6 &&
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ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr)))
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#endif
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{
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DEBUGASSERT(IFF_IS_IPv4(dev->d_flags));
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udp = UDPIPv4BUF;
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#ifdef CONFIG_NET_IPv6
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if (conn->domain == PF_INET6 &&
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ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr))
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{
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raddr = ip6_get_ipv4addr(conn->u.ipv6.raddr);
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}
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else
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#endif
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{
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raddr = conn->u.ipv4.raddr;
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}
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/* The total length to send is the size of the application data
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* plus the IPv4 and UDP headers (and, eventually, the link layer
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* header)
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*/
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dev->d_len = dev->d_sndlen + IPv4UDP_HDRLEN;
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ipv4_build_header(IPv4BUF, dev->d_len, IP_PROTO_UDP,
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&dev->d_ipaddr, &raddr, conn->sconn.ttl,
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conn->sconn.s_tos, NULL);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.ipv4.sent++;
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#endif
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}
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#endif /* CONFIG_NET_IPv4 */
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#ifdef CONFIG_NET_IPv6
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#ifdef CONFIG_NET_IPv4
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else
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#endif
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{
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/* Get pointers to the IPv6 header and the offset UDP header */
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DEBUGASSERT(IFF_IS_IPv6(dev->d_flags));
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udp = UDPIPv6BUF;
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/* The IPv6 length, Includes the UDP header size but not the IPv6
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* header size
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*/
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dev->d_len = dev->d_sndlen + UDP_HDRLEN;
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ipv6_build_header(IPv6BUF, dev->d_len, IP_PROTO_UDP,
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netdev_ipv6_srcaddr(dev, conn->u.ipv6.raddr),
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conn->u.ipv6.raddr,
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conn->sconn.ttl, conn->sconn.s_tclass);
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/* The total length to send is the size of the application data
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* plus the IPv6 and UDP headers (and, eventually, the link layer
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* header)
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*/
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dev->d_len += IPv6_HDRLEN;
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.ipv6.sent++;
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#endif
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}
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#endif /* CONFIG_NET_IPv6 */
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/* Initialize the UDP header */
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udp->srcport = conn->lport;
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udp->destport = conn->rport;
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udp->udplen = HTONS(dev->d_sndlen + UDP_HDRLEN);
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udp->udpchksum = 0;
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/* Update the device buffer length */
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iob_update_pktlen(dev->d_iob, dev->d_len, false);
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#ifdef CONFIG_NET_UDP_CHECKSUMS
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/* Calculate UDP checksum. */
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#ifdef CONFIG_NET_IPv4
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#ifdef CONFIG_NET_IPv6
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if (conn->domain == PF_INET ||
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(conn->domain == PF_INET6 &&
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ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr)))
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#endif
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{
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udp->udpchksum = ~udp_ipv4_chksum(dev);
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}
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#endif /* CONFIG_NET_IPv4 */
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#ifdef CONFIG_NET_IPv6
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#ifdef CONFIG_NET_IPv4
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else
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#endif
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{
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udp->udpchksum = ~udp_ipv6_chksum(dev);
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}
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#endif /* CONFIG_NET_IPv6 */
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if (udp->udpchksum == 0)
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{
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udp->udpchksum = 0xffff;
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}
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#endif /* CONFIG_NET_UDP_CHECKSUMS */
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ninfo("Outgoing UDP packet length: %d\n", dev->d_len);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.udp.sent++;
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#endif
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}
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}
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/****************************************************************************
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* Name: udpip_hdrsize
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*
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* Description:
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* Get the total size of L3 and L4 UDP header
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*
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* Input Parameters:
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* conn The connection structure associated with the socket
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*
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* Returned Value:
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* the total size of L3 and L4 TCP header
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*
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****************************************************************************/
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uint16_t udpip_hdrsize(FAR struct udp_conn_s *conn)
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{
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uint16_t hdrsize = sizeof(struct udp_hdr_s);
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#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
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if (conn->domain == PF_INET6 &&
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ip6_is_ipv4addr((FAR struct in6_addr *)conn->u.ipv6.raddr))
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{
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/* Select the IPv4 domain for hybrid dual-stack IPv6/IPv4 socket */
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return sizeof(struct ipv4_hdr_s) + hdrsize;
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}
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#endif
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UNUSED(conn);
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return net_ip_domain_select(conn->domain,
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sizeof(struct ipv4_hdr_s) + hdrsize,
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sizeof(struct ipv6_hdr_s) + hdrsize);
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}
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#endif /* CONFIG_NET && CONFIG_NET_UDP */
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