union sockunion *);
extern int sockopt_ttl(int family, int sock, int ttl);
extern int sockopt_minttl(int family, int sock, int minttl);
-extern int sockopt_cork(int sock, int onoff);
extern int sockunion_socket(const union sockunion *su);
extern const char *inet_sutop(const union sockunion *su, char *str);
extern enum connect_result sockunion_connect(int fd, const union sockunion *su,