402 lines
12 KiB
C
402 lines
12 KiB
C
/****************************************************************************
|
|
* net/sixlowpan/sixlowpan_udpsend.c
|
|
*
|
|
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "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
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS 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>
|
|
|
|
#include <sys/socket.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include "nuttx/net/netdev.h"
|
|
#include "nuttx/net/netstats.h"
|
|
|
|
#include "netdev/netdev.h"
|
|
#include "socket/socket.h"
|
|
#include "udp/udp.h"
|
|
#include "utils/utils.h"
|
|
#include "sixlowpan/sixlowpan_internal.h"
|
|
|
|
#if defined(CONFIG_NET_6LOWPAN) && defined(CONFIG_NET_UDP)
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sixlowpan_udp_chksum
|
|
*
|
|
* Description:
|
|
* Perform the checksum calcaultion over the IPv6, protocol headers, and
|
|
* data payload as necessary.
|
|
*
|
|
* Input Parameters:
|
|
* ipv6udp - A reference to a structure containing the IPv6 and UDP headers.
|
|
* buf - The beginning of the payload data
|
|
* buflen - The length of the payload data.
|
|
*
|
|
* Returned Value:
|
|
* The calculated checksum
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_UDP_CHECKSUMS
|
|
static uint16_t sixlowpan_udp_chksum(FAR struct ipv6udp_hdr_s *ipv6udp,
|
|
FAR const uint8_t *buf, uint16_t buflen)
|
|
{
|
|
uint16_t upperlen;
|
|
uint16_t sum;
|
|
|
|
/* The length reported in the IPv6 header is the length of the payload
|
|
* that follows the header.
|
|
*/
|
|
|
|
upperlen = ((uint16_t)ipv6udp->ipv6.len[0] << 8) + ipv6udp->ipv6.len[1];
|
|
|
|
/* Verify some minimal assumptions */
|
|
|
|
if (upperlen > CONFIG_NET_6LOWPAN_MTU)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* The checksum is calculated starting with a pseudo-header of IPv6 header
|
|
* fields according to the IPv6 standard, which consists of the source
|
|
* and destination addresses, the packet length and the next header field.
|
|
*/
|
|
|
|
sum = upperlen + ipv6udp->ipv6.proto;
|
|
|
|
/* Sum IP source and destination addresses. */
|
|
|
|
sum = chksum(sum, (FAR uint8_t *)ipv6udp->ipv6.srcipaddr,
|
|
2 * sizeof(net_ipv6addr_t));
|
|
|
|
/* Sum the UDP header */
|
|
|
|
sum = chksum(sum, (FAR uint8_t *)&ipv6udp->udp, UDP_HDRLEN);
|
|
|
|
/* Sum payload data. */
|
|
|
|
sum = chksum(sum, buf, buflen);
|
|
return (sum == 0) ? 0xffff : htons(sum);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: psock_6lowpan_udp_sendto
|
|
*
|
|
* Description:
|
|
* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
|
|
* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
|
|
* may be returned when they are not NULL and 0), and the error ENOTCONN is
|
|
* returned when the socket was not actually connected.
|
|
*
|
|
* Parameters:
|
|
* psock A pointer to a NuttX-specific, internal socket structure
|
|
* buf Data to send
|
|
* buflen Length of data to send
|
|
* flags Send flags
|
|
* to Address of recipient
|
|
* tolen The length of the address structure
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error,
|
|
* -1 is returned, and errno is set appropriately. Returned error
|
|
* number must be consistent with definition of errors reported by
|
|
* sendto().
|
|
*
|
|
* Assumptions:
|
|
* Called with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t psock_6lowpan_udp_sendto(FAR struct socket *psock,
|
|
FAR const void *buf,
|
|
size_t buflen, int flags,
|
|
FAR const struct sockaddr *to,
|
|
socklen_t tolen)
|
|
{
|
|
FAR struct sockaddr_in6 *to6 = (FAR struct sockaddr_in6 *)to;
|
|
FAR struct udp_conn_s *conn;
|
|
FAR struct net_driver_s *dev;
|
|
struct ipv6udp_hdr_s ipv6udp;
|
|
struct rimeaddr_s destmac;
|
|
uint16_t iplen;
|
|
uint16_t timeout;
|
|
int ret;
|
|
|
|
ninfo("buflen %lu\n", (unsigned long)buflen);
|
|
|
|
DEBUGASSERT(psock != NULL && psock->s_crefs > 0 && to != NULL);
|
|
DEBUGASSERT(psock->s_type == SOCK_DGRAM);
|
|
|
|
sixlowpan_dumpbuffer("Outgoing UDP payload", buf, buflen);
|
|
|
|
if (psock == NULL || to == NULL)
|
|
{
|
|
return (ssize_t)-EINVAL;
|
|
}
|
|
|
|
/* Make sure that this is a datagram valid socket */
|
|
|
|
if (psock->s_crefs <= 0 || psock->s_type != SOCK_DGRAM)
|
|
{
|
|
nerr("ERROR: Invalid socket\n");
|
|
return (ssize_t)-EBADF;
|
|
}
|
|
|
|
/* Make sure that the destination address is valid */
|
|
|
|
if (to6->sin6_family != AF_INET6 || tolen < sizeof(struct sockaddr_in6))
|
|
{
|
|
nerr("ERROR: Invalid destination address: sin6_family=%u tolen = %u\n",
|
|
to6->sin6_family, tolen);
|
|
return (ssize_t)-EPROTOTYPE;
|
|
}
|
|
|
|
/* Get the underlying UDP "connection" structure */
|
|
|
|
conn = (FAR struct udp_conn_s *)psock->s_conn;
|
|
DEBUGASSERT(conn != NULL);
|
|
|
|
/* Route outgoing message to the correct device */
|
|
|
|
#ifdef CONFIG_NETDEV_MULTINIC
|
|
dev = netdev_findby_ipv6addr(conn->u.ipv6.laddr,
|
|
to6->sin6_addr.in6_u.u6_addr16);
|
|
#ifdef CONFIG_NETDEV_MULTILINK
|
|
if (dev == NULL || dev->d_lltype != NET_LL_IEEE802154)
|
|
#else
|
|
if (dev == NULL)
|
|
#endif
|
|
{
|
|
nwarn("WARNING: Not routable or not IEEE802.15.4 MAC\n");
|
|
return (ssize_t)-ENETUNREACH;
|
|
}
|
|
#else
|
|
dev = netdev_findby_ipv6addr(to6->sin6_addr.in6_u.u6_addr16);
|
|
#ifdef CONFIG_NETDEV_MULTILINK
|
|
if (dev == NULL || dev->d_lltype != NET_LL_IEEE802154)
|
|
#else
|
|
if (dev == NULL)
|
|
#endif
|
|
{
|
|
nwarn("WARNING: Not routable\n");
|
|
return (ssize_t)-ENETUNREACH;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
|
|
/* Make sure that the IP address mapping is in the Neighbor Table */
|
|
|
|
ret = icmpv6_neighbor(to6->sin6_addr.in6_u.u6_addr16);
|
|
if (ret < 0)
|
|
{
|
|
nerr("ERROR: Not reachable\n");
|
|
return (ssize_t)-ENETUNREACH;
|
|
}
|
|
#endif
|
|
|
|
/* Initialize the IPv6/UDP headers */
|
|
|
|
ipv6udp.ipv6.vtc = 0x60;
|
|
ipv6udp.ipv6.tcf = 0x00;
|
|
ipv6udp.ipv6.flow = 0x00;
|
|
ipv6udp.ipv6.proto = IP_PROTO_UDP;
|
|
ipv6udp.ipv6.ttl = conn->ttl;
|
|
|
|
/* The IPv6 header length field does not include the size of IPv6 IP
|
|
* header.
|
|
*/
|
|
|
|
iplen = buflen + UDP_HDRLEN;
|
|
ipv6udp.ipv6.len[0] = (iplen >> 8);
|
|
ipv6udp.ipv6.len[1] = (iplen & 0xff);
|
|
|
|
/* Copy the source and destination addresses */
|
|
|
|
net_ipv6addr_hdrcopy(ipv6udp.ipv6.destipaddr, to6->sin6_addr.in6_u.u6_addr16);
|
|
net_ipv6addr_hdrcopy(ipv6udp.ipv6.srcipaddr, conn->u.ipv6.laddr);
|
|
|
|
ninfo("IPv6 length: %d\n",
|
|
((int)ipv6udp.ipv6.len[0] << 8) + ipv6udp.ipv6.len[1]);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.ipv6.sent++;
|
|
#endif
|
|
|
|
/* Initialize the UDP header */
|
|
|
|
ipv6udp.udp.srcport = conn->lport;
|
|
ipv6udp.udp.destport = to6->sin6_port;
|
|
ipv6udp.udp.udplen = htons(iplen);
|
|
ipv6udp.udp.udpchksum = 0;
|
|
|
|
#ifdef CONFIG_NET_UDP_CHECKSUMS
|
|
ipv6udp.udp.udpchksum = ~sixlowpan_udp_chksum(ipv6udp, buf, buflen);
|
|
if (ipv6udp.udp.udpchksum == 0)
|
|
{
|
|
ipv6udp.udp.udpchksum = 0xffff;
|
|
}
|
|
#endif /* CONFIG_NET_UDP_CHECKSUMS */
|
|
|
|
ninfo("Outgoing UDP packet length: %d\n", iplen + IPv6_HDRLEN);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.udp.sent++;
|
|
#endif
|
|
|
|
/* Set the socket state to sending */
|
|
|
|
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);
|
|
|
|
/* Get the Rime MAC address of the destination This assumes an encoding
|
|
* of the MAC address in the IPv6 address.
|
|
*/
|
|
|
|
sixlowpan_rimefromip(to6->sin6_addr.in6_u.u6_addr16, &destmac);
|
|
|
|
/* If routable, then call sixlowpan_send() to format and send the 6loWPAN
|
|
* packet.
|
|
*/
|
|
|
|
#ifdef CONFIG_NET_SOCKOPTS
|
|
timeout = psock->s_sndtimeo;
|
|
#else
|
|
timeout = 0;
|
|
#endif
|
|
|
|
ret = sixlowpan_send(dev, &conn->list,
|
|
(FAR const struct ipv6_hdr_s *)&ipv6udp,
|
|
buf, buflen, &destmac, timeout);
|
|
if (ret < 0)
|
|
{
|
|
nerr("ERROR: sixlowpan_send() failed: %d\n", ret);
|
|
}
|
|
|
|
/* Set the socket state to idle */
|
|
|
|
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: psock_6lowpan_udp_send
|
|
*
|
|
* Description:
|
|
* psock_6lowpan_udp_send() call may be used with connectionlesss UDP
|
|
* sockets.
|
|
*
|
|
* Parameters:
|
|
* psock - An instance of the internal socket structure.
|
|
* buf - Data to send
|
|
* buflen - Length of data to send
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error,
|
|
* -1 is returned, and errno is set appropriately. Returned error numbers
|
|
* must be consistent with definition of errors reported by send().
|
|
*
|
|
* Assumptions:
|
|
* Called with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t psock_6lowpan_udp_send(FAR struct socket *psock, FAR const void *buf,
|
|
size_t buflen)
|
|
{
|
|
FAR struct udp_conn_s *conn;
|
|
struct sockaddr_in6 to;
|
|
|
|
ninfo("buflen %lu\n", (unsigned long)buflen);
|
|
|
|
DEBUGASSERT(psock != NULL && psock->s_crefs > 0);
|
|
DEBUGASSERT(psock->s_type == SOCK_DGRAM);
|
|
|
|
sixlowpan_dumpbuffer("Outgoing UDP payload", buf, buflen);
|
|
|
|
/* Make sure that this is a valid socket */
|
|
|
|
if (psock != NULL || psock->s_crefs <= 0)
|
|
{
|
|
nerr("ERROR: Invalid socket\n");
|
|
return (ssize_t)-EBADF;
|
|
}
|
|
|
|
/* Was the UDP socket connected via connect()? */
|
|
|
|
if (psock->s_type != SOCK_DGRAM || !_SS_ISCONNECTED(psock->s_flags))
|
|
{
|
|
/* No, then it is not legal to call send() with this socket. */
|
|
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
/* Get the underlying UDP "connection" structure */
|
|
|
|
conn = (FAR struct udp_conn_s *)psock->s_conn;
|
|
DEBUGASSERT(conn != NULL);
|
|
|
|
/* Ignore if not IPv6 domain */
|
|
|
|
if (conn->domain != PF_INET6)
|
|
{
|
|
nwarn("WARNING: Not IPv6\n");
|
|
return (ssize_t)-EPROTOTYPE;
|
|
}
|
|
|
|
/* Create the 'to' address */
|
|
|
|
to.sin6_family = AF_INET6;
|
|
to.sin6_port = conn->rport; /* Already network order */
|
|
memcpy(to.sin6_addr.in6_u.u6_addr16, conn->u.ipv6.raddr, 16);
|
|
|
|
return psock_6lowpan_udp_sendto(psock, buf, buflen, 0,
|
|
(FAR const struct sockaddr *)&to,
|
|
sizeof(struct sockaddr_in6));
|
|
}
|
|
|
|
#endif /* CONFIG_NET_6LOWPAN && CONFIG_NET_UDP */
|