#if !defined(UDP_H)#define UDP_H#include <sys/socket.h>#include <netdb.h>typedef struct _udp_con{  int soc;  int family;  int port;  char peer[NI_MAXHOST];  struct addrinfo *client_info;  struct addrinfo *server_info;}udp_con_t;int internal_realloc(void **ptr,size_t new_size,size_t old_size);int udp_setup_client(udp_con_t *con,const char *hostname, int port,int family);int udp_setup_server(udp_con_t *con,int port,int family);int udp_send_message(const udp_con_t *con,const char *ipaddr,int port, const char *msg,size_t len);int udp_send_peer(const udp_con_t *con,const char *msg,size_t len);int udp_send_broadcast_with_addr(const udp_con_t *con,const char *bcast,const char *msg,size_t len);int udp_send_broadcast(const udp_con_t *con,const char *msg,size_t len);int udp_enable_broadcast(const udp_con_t *con);int udp_disable_broadcast(const udp_con_t *con);int udp_recv_message(const udp_con_t *con,char **msg,size_t *len);const char *udp_get_peeraddr(const udp_con_t *con);int udp_release_connection(udp_con_t *con);#endif