C++ (Cpp) ipv4_to_ether_multicastの例

コード例 #1

ファイル: arp.cpp プロジェクト: mmanley/Antares

static status_t
arp_leave_multicast(net_datalink_protocol *protocol, const sockaddr *address)
{
	if (address->sa_family != AF_INET)
		return EINVAL;

	sockaddr_dl multicastAddress;
	ipv4_to_ether_multicast(&multicastAddress, (const sockaddr_in *)address);

	return protocol->next->module->leave_multicast(protocol->next,
		(sockaddr *)&multicastAddress);
}

コード例 #2

ファイル: arp.cpp プロジェクト: AmirAbrams/haiku

status_t
arp_send_data(net_datalink_protocol *_protocol, net_buffer *buffer)
{
	arp_protocol *protocol = (arp_protocol *)_protocol;
	{
		MutexLocker locker(sCacheLock);

		// Set buffer target and destination address

		memcpy(buffer->source, &protocol->hardware_address,
			protocol->hardware_address.sdl_len);

		if ((buffer->flags & MSG_MCAST) != 0) {
			sockaddr_dl multicastDestination;
			ipv4_to_ether_multicast(&multicastDestination,
				(sockaddr_in *)buffer->destination);
			memcpy(buffer->destination, &multicastDestination,
				sizeof(multicastDestination));
		} else if ((buffer->flags & MSG_BCAST) == 0) {
			// Lookup destination (we may need to wait for this)
			arp_entry *entry = arp_entry::Lookup(
				((struct sockaddr_in *)buffer->destination)->sin_addr.s_addr);
			if (entry == NULL) {
				status_t status = arp_start_resolve(protocol,
					((struct sockaddr_in*)buffer->destination)->sin_addr.s_addr,
					&entry);
				if (status != B_OK)
					return status;
			}

			if ((entry->flags & ARP_FLAG_REJECT) != 0)
				return EHOSTUNREACH;

			if ((entry->flags & ARP_FLAG_VALID) == 0) {
				// entry is still being resolved.
				TRACE(("ARP Queuing packet %p, entry still being resolved.\n",
					buffer));
				entry->queue.Add(buffer);
				return B_OK;
			}

			memcpy(buffer->destination, &entry->hardware_address,
				entry->hardware_address.sdl_len);
		}
		// the broadcast address is set in the ethernet frame module
	}
	TRACE(("%s(%p): from %s\n", __FUNCTION__, buffer,
		mac_to_string(LLADDR((sockaddr_dl*)buffer->source))));
	TRACE(("  to %s\n",
		mac_to_string(LLADDR((sockaddr_dl*)buffer->destination))));

	return protocol->next->module->send_data(protocol->next, buffer);
}