+typedef struct past_request_t {
+ const char *request;
+ time_t firstseen;
+} past_request_t;
+
+typedef struct {
+ request_handler_t *const handler;
+ const char *name;
+} request_entry_t;
+
+extern bool tunnelserver;
+extern bool strictsubnets;
+extern bool experimental;
+
+extern int invitation_lifetime;
+extern ecdsa_t *invitation_key;
+
+/* Maximum size of strings in a request.
+ * scanf terminates %2048s with a NUL character,
+ * but the NUL character can be written after the 2048th non-NUL character.
+ */
+
+#define MAX_STRING_SIZE 2049
+#define MAX_STRING "%2048s"
+
+#include "edge.h"
+#include "net.h"
+#include "node.h"
+#include "subnet.h"
+
+/* Basic functions */
+
+extern bool send_request(struct connection_t *c, const char *format, ...) ATTR_FORMAT(printf, 2, 3);
+extern void forward_request(struct connection_t *c, const char *request);
+extern bool receive_request(struct connection_t *c, const char *request);
+
+extern void exit_requests(void);
+extern bool seen_request(const char *request);
+
+extern const request_entry_t *get_request_entry(request_t req);
+
+/* Requests */
+
+extern bool send_id(struct connection_t *c);
+extern bool send_metakey(struct connection_t *c);
+extern bool send_challenge(struct connection_t *c);
+extern bool send_chal_reply(struct connection_t *c);
+extern bool send_ack(struct connection_t *c);
+extern bool send_termreq(struct connection_t *c);
+extern bool send_ping(struct connection_t *c);
+extern bool send_pong(struct connection_t *c);
+extern bool send_add_subnet(struct connection_t *c, const struct subnet_t *subnet);
+extern bool send_del_subnet(struct connection_t *c, const struct subnet_t *subnet);
+extern bool send_add_edge(struct connection_t *c, const struct edge_t *e);
+extern bool send_del_edge(struct connection_t *c, const struct edge_t *e);
+extern void send_key_changed(void);
+extern bool send_req_key(struct node_t *to);
+extern bool send_ans_key(struct node_t *to);
+extern bool send_tcppacket(struct connection_t *c, const struct vpn_packet_t *packet);
+extern bool send_sptps_tcppacket(struct connection_t *c, const void *packet, size_t len);
+extern bool send_udp_info(struct node_t *from, struct node_t *to);
+extern bool send_mtu_info(struct node_t *from, struct node_t *to, int mtu);
+
+/* Request handlers */
+
+extern request_handler_t id_h;
+extern request_handler_t metakey_h;
+extern request_handler_t challenge_h;
+extern request_handler_t chal_reply_h;
+extern request_handler_t ack_h;
+extern request_handler_t termreq_h;
+extern request_handler_t ping_h;
+extern request_handler_t pong_h;
+extern request_handler_t add_subnet_h;
+extern request_handler_t del_subnet_h;
+extern request_handler_t add_edge_h;
+extern request_handler_t del_edge_h;
+extern request_handler_t key_changed_h;
+extern request_handler_t req_key_h;
+extern request_handler_t ans_key_h;
+extern request_handler_t tcppacket_h;
+extern request_handler_t sptps_tcppacket_h;
+extern request_handler_t control_h;
+extern request_handler_t udp_info_h;
+extern request_handler_t mtu_info_h;
+
+#endif