Subversion Repositories planix.SVN

#include <plan9.h>
#include <sys/socket.h> /* various networking crud */
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>

void
getremotehostname(char *name, int nname)
{
        struct sockaddr_in sock;
        struct hostent *hp;
        uint len;
        int on;

        strecpy(name, name+nname, "unknown");
        len = sizeof sock;
        if(getpeername(0, (struct sockaddr*)&sock, (void*)&len) < 0)
                return;

        hp = gethostbyaddr((char *)&sock.sin_addr, sizeof (struct in_addr),
                sock.sin_family);
        if(hp == 0)
                return;

        strecpy(name, name+nname, hp->h_name);
        on = 1;
        setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char*)&on, sizeof(on));
#ifdef TCP_NODELAY
        on = 1;
        setsockopt(0, IPPROTO_TCP, TCP_NODELAY, (char*)&on, sizeof(on));
#endif
}