static uint16_t arp_send_eventhandler(FAR struct net_driver_s *dev,
FAR void *pvconn,
FAR void *priv, uint16_t flags)
{
FAR struct arp_send_s *state = (FAR struct arp_send_s *)priv;
ninfo("flags: %04x sent: %d\n", flags, state->snd_sent);
if (state)
{
/* Check if the network is still up */
if ((flags & NETDEV_DOWN) != 0)
{
nerr("ERROR: Interface is down\n");
arp_send_terminate(state, -ENETUNREACH);
return flags;
}
/* Check if the outgoing packet is available. It may have been claimed
* by a send event handler serving a different thread -OR- if the
* output buffer currently contains unprocessed incoming data. In
* these cases we will just have to wait for the next polling cycle.
*/
if (dev->d_sndlen > 0 || (flags & PKT_NEWDATA) != 0)
{
/* Another thread has beat us sending data or the buffer is busy,
* Check for a timeout. If not timed out, wait for the next
* polling cycle and check again.
*/
/* REVISIT: No timeout. Just wait for the next polling cycle */
return flags;
}
/* It looks like we are good to send the data */
/* Copy the packet data into the device packet buffer and send it */
arp_format(dev, state->snd_ipaddr);
/* Make sure no ARP request overwrites this ARP request. This
* flag will be cleared in arp_out().
*/
IFF_SET_NOARP(dev->d_flags);
/* Don't allow any further call backs. */
arp_send_terminate(state, OK);
}
return flags;
}
void icmpv6_solicit(FAR struct net_driver_s *dev,
FAR const net_ipv6addr_t ipaddr)
{
FAR struct icmpv6_iphdr_s *icmp;
FAR struct icmpv6_neighbor_solicit_s *sol;
FAR struct eth_hdr_s *eth;
/* Set up the IPv6 header (most is probably already in place) */
icmp = ICMPv6BUF;
icmp->vtc = 0x60; /* Version/traffic class (MS) */
icmp->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
icmp->flow = 0; /* Flow label (LS) */
/* Length excludes the IPv6 header */
icmp->len[0] = (sizeof(struct icmpv6_neighbor_solicit_s) >> 8);
icmp->len[1] = (sizeof(struct icmpv6_neighbor_solicit_s) & 0xff);
icmp->proto = IP_PROTO_ICMP6; /* Next header */
icmp->ttl = 255; /* Hop limit */
/* Set the multicast destination IP address */
memcpy(icmp->destipaddr, g_icmpv_mcastaddr, 6*sizeof(uint16_t));
icmp->destipaddr[6] = ipaddr[6] | HTONS(0xff00);
icmp->destipaddr[7] = ipaddr[7];
/* Add out IPv6 address as the source address */
net_ipv6addr_copy(icmp->srcipaddr, dev->d_ipv6addr);
/* Set up the ICMPv6 Neighbor Solicitation message */
sol = ICMPv6SOLICIT;
sol->type = ICMPv6_NEIGHBOR_SOLICIT; /* Message type */
sol->code = 0; /* Message qualifier */
sol->flags[0] = 0; /* flags */
sol->flags[1] = 0;
sol->flags[2] = 0;
sol->flags[3] = 0;
/* Copy the target address into the Neighbor Solicitation message */
net_ipv6addr_copy(sol->tgtaddr, ipaddr);
/* Set up the options */
sol->opttype = ICMPv6_OPT_SRCLLADDR; /* Option type */
sol->optlen = 1; /* Option length = 1 octet */
/* Copy our link layer address into the message
* REVISIT: What if the link layer is not Ethernet?
*/
memcpy(sol->srclladdr, &dev->d_mac, IFHWADDRLEN);
/* Calculate the checksum over both the ICMP header and payload */
icmp->chksum = 0;
icmp->chksum = ~icmpv6_chksum(dev);
/* Set the size to the size of the IPv6 header and the payload size */
dev->d_len = IPv6_HDRLEN + sizeof(struct icmpv6_neighbor_solicit_s);
#ifdef CONFIG_NET_ETHERNET
#ifdef CONFIG_NET_MULTILINK
if (dev->d_lltype == NET_LL_ETHERNET)
#endif
{
/* Set the destination IPv6 multicast Ethernet address:
*
* For IPv6 multicast addresses, the Ethernet MAC is derived by
* the four low-order octets OR'ed with the MAC 33:33:00:00:00:00,
* so for example the IPv6 address FF02:DEAD:BEEF::1:3 would map
* to the Ethernet MAC address 33:33:00:01:00:03.
*
* NOTES: This appears correct for the ICMPv6 Router Solicitation
* Message, but the ICMPv6 Neighbor Solicitation message seems to
* use 33:33:ff:01:00:03.
*/
eth = ETHBUF;
eth->dest[0] = 0x33;
eth->dest[1] = 0x33;
eth->dest[2] = 0xff;
eth->dest[3] = ipaddr[6] >> 8;
eth->dest[4] = ipaddr[7] & 0xff;
eth->dest[5] = ipaddr[7] >> 8;
/* Move our source Ethernet addresses into the Ethernet header */
memcpy(eth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
/* Set the IPv6 Ethernet type */
eth->type = HTONS(ETHTYPE_IP6);
#if 0
/* No additional neighbor lookup is required on this packet.
* REVISIT: It is inappropriate to set this bit if we get here
* via neighbor_out(); It is no necessary to set this bit if we
* get here via icmpv6_input(). Is it ever necessary?
*/
IFF_SET_NOARP(dev->d_flags);
#endif
}
static uint16_t icmpv6_neighbor_interrupt(FAR struct net_driver_s *dev,
FAR void *pvconn,
FAR void *priv, uint16_t flags)
{
FAR struct icmpv6_neighbor_s *state = (FAR struct icmpv6_neighbor_s *)priv;
nllvdbg("flags: %04x sent: %d\n", flags, state->snd_sent);
if (state)
{
#ifdef CONFIG_NETDEV_MULTINIC
/* Is this the device that we need to route this request? */
if (strncmp((FAR const char *)dev->d_ifname,
(FAR const char *)state->snd_ifname, IFNAMSIZ) != 0)
{
/* No... pass on this one and wait for the device that we want */
return flags;
}
#endif
/* Check if the outgoing packet is available. It may have been claimed
* by a send interrupt serving a different thread -OR- if the output
* buffer currently contains unprocessed incoming data. In these cases
* we will just have to wait for the next polling cycle.
*/
if (dev->d_sndlen > 0 || (flags & ICMPv6_NEWDATA) != 0)
{
/* Another thread has beat us sending data or the buffer is busy,
* Check for a timeout. If not timed out, wait for the next
* polling cycle and check again.
*/
/* REVISIT: No timeout. Just wait for the next polling cycle */
return flags;
}
/* It looks like we are good to send the data */
/* Copy the packet data into the device packet buffer and send it */
icmpv6_solicit(dev, state->snd_ipaddr);
/* Make sure no additional Neighbor Solicitation overwrites this one.
* This flag will be cleared in icmpv6_out().
*/
IFF_SET_NOARP(dev->d_flags);
/* Don't allow any further call backs. */
state->snd_sent = true;
state->snd_cb->flags = 0;
state->snd_cb->priv = NULL;
state->snd_cb->event = NULL;
/* Wake up the waiting thread */
sem_post(&state->snd_sem);
}
return flags;
}
static uint16_t icmpv6_router_interrupt(FAR struct net_driver_s *dev,
FAR void *pvconn,
FAR void *priv, uint16_t flags)
{
FAR struct icmpv6_router_s *state = (FAR struct icmpv6_router_s *)priv;
ninfo("flags: %04x sent: %d\n", flags, state->snd_sent);
if (state)
{
/* Check if the network is still up */
if ((flags & NETDEV_DOWN) != 0)
{
nerr("ERROR: Interface is down\n");
icmpv6_router_terminate(state, -ENETUNREACH);
return flags;
}
/* Check if the outgoing packet is available. It may have been claimed
* by a send interrupt serving a different thread -OR- if the output
* buffer currently contains unprocessed incoming data. In these cases
* we will just have to wait for the next polling cycle.
*/
else if (dev->d_sndlen > 0 || (flags & ICMPv6_NEWDATA) != 0)
{
/* Another thread has beat us sending data or the buffer is busy,
* Check for a timeout. If not timed out, wait for the next
* polling cycle and check again.
*/
/* REVISIT: No timeout. Just wait for the next polling cycle */
return flags;
}
/* It looks like we are good to send the data */
/* Copy the packet data into the device packet buffer and send it */
if (state->snd_advertise)
{
/* Send the ICMPv6 Neighbor Advertisement message */
icmpv6_advertise(dev, g_ipv6_allnodes);
}
else
{
/* Send the ICMPv6 Router Solicitation message */
icmpv6_rsolicit(dev);
}
/* Make sure no additional Router Solicitation overwrites this one.
* This flag will be cleared in icmpv6_out().
*/
IFF_SET_NOARP(dev->d_flags);
/* Don't allow any further call backs. */
icmpv6_router_terminate(state, OK);
}
return flags;
}
