added networking components, hosts are next

src/core/node.cc

@@ -0,0 +1,67 @@
+#include "core/node.h"
+
+#include "core/simulator.h"
+#include "core/error.h"
+
+#include <optional>
+
+namespace dofs {
+
+Node::Node(Simulator *const sim, NodeId id, NodeType type) noexcept
+        : _sim(sim), _id(id), _status(NodeStatus::OK), _type(type) {}
+
+// Accessors
+NodeId Node::id() const noexcept {
+        return _id;
+}
+NodeStatus Node::status() const noexcept {
+        return _status;
+}
+NodeType Node::type() const noexcept {
+        return _type;
+}
+
+void Node::set_status(NodeStatus s) noexcept {
+        _status = s;
+}
+
+static inline bool schedule_status_ok_after(Simulator *const sim, Time delay_ns,
+                Node* self) {
+        if (!sim) {
+                log_error("ERROR", "Node: simulator instance not found for boot/reboot");
+                return false;
+        }
+
+        sim->schedule_after(delay_ns, [self]() {
+                self->set_status(NodeStatus::OK);
+        });
+        return true;
+}
+
+void Node::boot(Time boottime_ns) {
+        if (_status != NodeStatus::DOWN) {
+                log_error("ERROR", "boot() ignored: node not in DOWN state");
+                return;
+        }
+
+        _status = NodeStatus::BOOTING;
+
+        if (!schedule_status_ok_after(_sim, boottime_ns, this)) {
+                // Intentionally left BOOTING; caller can handle recovery/logs.
+        }
+}
+
+void Node::reboot(Time boottime_ns) {
+        if (_status != NodeStatus::OK && _status != NodeStatus::THROTTLING) {
+                log_error("ERROR", "reboot() ignored: node not in OK/THROTTLING state");
+                return;
+        }
+
+        _status = NodeStatus::BOOTING;
+
+        if (!schedule_status_ok_after(_sim, boottime_ns, this)) {
+                // Intentionally left BOOTING; caller can handle recovery/logs.
+        }
+}
+
+} // namespace dofs