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#pragma once
#include "routing.h"
#include <sys/socket.h>
#include <arpa/inet.h>
// 192.0.2.0
#define UNDEF_ADDR (struct in_addr){0xC0000200}
#define MAX_DISC 32
#define MAX_INFLIGHT 32
#define UNCERTAIN_TIME 900
#define PROTO_TMOUT 60
struct discovery {
struct in_addr addr;
uint16_t port;
struct nodeid expected_id;
};
union message_cont {
struct discovery discovery;
};
struct dht;
struct msgbuff;
#define PROCESS_REPONSE(NAME) int NAME(struct dht* dht, time_t now, union message_cont* cont, char* packet, size_t packet_len, int socket, struct sockaddr* remote, socklen_t remote_len, struct msgbuff* msgbuff)
typedef PROCESS_REPONSE(cont);
#define PROCESS_TIMEOUT(NAME) int NAME(struct dht* dht, struct nodeid* self, time_t now, union message_cont* cont, struct msgbuff* msgbuff)
typedef PROCESS_TIMEOUT(tmout);
struct dht {
struct nodeid self;
int sfd;
struct in_addr addrs[MAX_DISC];
struct discovery pending_discover[MAX_DISC];
bool pause;
bool reqalloc[MAX_INFLIGHT];
struct {
struct sockaddr_storage addr;
cont fun;
time_t timeout;
tmout timeout_fun;
union message_cont cont;
} requestdata[MAX_INFLIGHT];
};
struct message {
char payload[128];
size_t payload_len;
struct sockaddr_storage dest;
socklen_t dest_len;
};
void proto_begin(struct dht* dht, time_t now, struct message** output, const struct message* const output_end);
int proto_run(struct dht* dht, char* buffer, size_t buffer_len, struct sockaddr_in* remote, socklen_t remote_len, time_t now, struct message** output, const struct message* const output_end);
void proto_end(struct dht* dht);
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