added networking components, hosts are next

src/network/switch/multicast_table.h

@@ -0,0 +1,52 @@
+#ifndef NETWORK_SWITCH_MULTICAST_TABLE_H
+#define NETWORK_SWITCH_MULTICAST_TABLE_H
+
+#include <cstdint>
+#include <vector>
+#include <optional>
+#include <algorithm>
+
+#include "core/types.h"
+#include "network/packet.h"
+
+namespace dofs {
+
+struct McTree {
+        std::vector<PortId> child_ports;
+        std::optional<PortId> parent_port;
+        uint8_t weight{1};
+        uint8_t tier{0};
+        uint16_t tree_id{0};
+        uint8_t epoch{0};
+};
+
+class MulticastTable {
+public:
+        MulticastTable();
+
+        bool add_tree(std::size_t group_id, uint16_t tree_id);
+        bool delete_tree(std::size_t group_id, uint16_t tree_id);
+
+        bool add_child_port(std::size_t group_id, uint16_t tree_id, PortId out_port);
+        bool delete_child_port(std::size_t group_id, uint16_t tree_id, PortId out_port);
+
+        bool set_parent(std::size_t group_id, uint16_t tree_id, PortId parent);
+        bool set_weight(std::size_t group_id, uint16_t tree_id, uint8_t w);
+        bool set_epoch(std::size_t group_id, uint16_t tree_id, uint8_t epoch);
+
+        const std::vector<McTree> *trees_of(std::size_t group_id) const;
+        std::size_t group_count() const noexcept;
+
+        // Legacy: return ports from tree_id=0 for each group bit
+        std::vector<PortId> get_port_list(PacketGroups groups) const;
+
+private:
+        static bool insert_sorted_unique(std::vector<PortId> &vec, PortId v);
+        static bool erase_sorted(std::vector<PortId> &vec, PortId v);
+
+        std::vector<std::vector<McTree>> _groups;
+};
+
+} // namespace dofs
+
+#endif // NETWORK_SWITCH_MULTICAST_TABLE_H