getnameinfo:
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
int main()
{
struct sockaddr_in addrSrv;
bzero(&addrSrv, sizeof(addrSrv));
addrSrv.sin_family = AF_INET;
addrSrv.sin_addr.s_addr = inet_addr("127.0.0.1");
addrSrv.sin_port = htons(6000);
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
getnameinfo((struct sockaddr*)&addrSrv, sizeof(addrSrv),
hbuf, sizeof(hbuf),
sbuf, sizeof(sbuf),
NI_NUMERICHOST|NI......
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