Method DownloadSelectedContentFallback

src/network/network_content.cpp:338–362

* Initiate downloading the content over the fallback protocol. * @param content The content to download. */

 * @param content The content to download.
 */
void ClientNetworkContentSocketHandler::DownloadSelectedContentFallback(const ContentIDList &content)
{
	uint count = (uint)content.size();
	const ContentID *content_ids = content.data();
	this->Connect();

	while (count > 0) {
		/* We can "only" send a limited number of IDs in a single packet.
		 * A packet begins with the packet size and a byte for the type.
		 * Then this packet adds a uint16_t for the count in this packet.
		 * The rest of the packet can be used for the IDs. */
		uint p_count = std::min<uint>(count, (TCP_MTU - sizeof(PacketSize) - sizeof(uint8_t) - sizeof(uint16_t)) / sizeof(uint32_t));

		auto p = std::make_unique<Packet>(this, PACKET_CONTENT_CLIENT_CONTENT, TCP_MTU);
		p->Send_uint16(p_count);

		for (uint i = 0; i < p_count; i++) {
			p->Send_uint32(content_ids[i]);
		}

		this->SendPacket(std::move(p));
		count -= p_count;
		content_ids += p_count;
	}
}

/**
 * Determine the full filename of a piece of content information