#include <netdb.h>

#include <sys/socket.h>

#include <sys/time.h>

#define SOCKADDR_SIZE(addr) ((addr).ss_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6))

#define SOCKADDRP_SIZE(addr) ((addr)->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6))

char *stringcopy(const char *s, int len);

int verifyutf8(const unsigned char *str, size_t str_len);

const char *addr2string(struct sockaddr *addr, char *buf, size_t len);

struct sockaddr *addr_copy(struct sockaddr *in);

void port_set(struct sockaddr *sa, uint16_t port);

void sock_dgram_skip(int socket);

void printfchars(char *prefixfmt, char *prefix, char *charfmt, uint8_t *chars, int len);

void disable_DF_bit(int socket, struct addrinfo *res);

void enable_keepalive(int socket);

int bindtoaddr(struct addrinfo *addrinfo, int family, int reuse);

int connecttcp(struct addrinfo *addrinfo, struct addrinfo *src, uint16_t timeout);

void accepttcp(int socket, void handler(int));

uint32_t connect_wait(struct timeval attempt_start, struct timeval last_success, int firsttry);