//------------------------------------------------------------ // RRListen() - Creates a listen socket for session status and // restart requests int RRListen(unsigned short *listenport) { unsigned short port; int s; struct sockaddr_in saddr; if ((s =3D socket (AF_INET, SOCK_DGRAM, 0)) < 0) { syslog(LOG_ERR, "Error creating listen socket: %m"); return -1; } // Bind first available port starting at 7770 port =3D 7770; saddr.sin_family =3D AF_INET; saddr.sin_addr.s_addr =3D INADDR_ANY; do { saddr.sin_port =3D htons(port); errno =3D 0; if (bind(s, (struct sockaddr *) &saddr, sizeof(struct = sockaddr_in)) < 0) { if (errno !=3D EADDRINUSE) { syslog(LOG_ERR, "Error binding listen socket: %m"); close(s); return -1; } else { port++; } } } while (errno =3D=3D EADDRINUSE); if (listen(s, 1) < 0) { syslog(LOG_ERR, "Error listening on socket: %m"); close(s); return -1; } *listenport =3D port; syslog(LOG_INFO, "Established listener on port: %i", port); return s; ) -------------------------------------------------------------------------= ------ ------=_NextPart_000_000A_01BE2111.78BC2770 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I am trying to port a cable modem = (roadrunner)=20 login program written for linux to freebsd 2.2.7 before the Dec 15=20 deadline. Should have been suspicious when it compiled cleanly = without=20 error message.

The program runs up to the point of setting up a TCP = socket to=20 request a login sequence using functions:

socket()

htons()

bind()

listen()

and then quits with errnum for "Operation not=20 supported".

The function calls seem to be correctly written and = do not=20 return any errors when called (except for listen()).

Is this a correct sequence to establish a passive = tcp=20 connection? Is there a better way to do it? Is there a knowledge = base for=20 converting linux code to run on FreeBSD? = References=20 for the correct way to write code to establish tcp = connections?

If a review of the code segment would be helpful, it = is brief=20 and follows.

Thanks

Jim Flowers <jflowers@ezo.net>

//------------------------------------------------------------//=20 RRListen() - Creates a listen socket for session status=20 and
//          &nbs= p;  =20 restart requests
int RRListen(unsigned short=20 *listenport)
{
unsigned short port;
   int=20 s;
   struct sockaddr_in saddr;

   if ((s =3D socket = (AF_INET,=20 SOCK_DGRAM, 0)) < 0) {
      = syslog(LOG_ERR,=20 "Error creating listen socket: = %m");
     =20 return -1;
   }

// Bind first available port = starting at=20 7770
   port =3D 7770;
   saddr.sin_family =3D = AF_INET;
   saddr.sin_addr.s_addr =3D = INADDR_ANY;
   do=20 {
    saddr.sin_port =3D=20 htons(port);
      errno =3D=20 0;
      if (bind(s, (struct sockaddr *) = &saddr,=20 sizeof(struct sockaddr_in)) < 0) {
if (errno !=3D = EADDRINUSE)=20 {
          =20 syslog(LOG_ERR, "Error binding listen socket:=20 %m");
          = ;=20 close(s);
          = return=20 -1;
         } else=20 {
   =20 port++;
        =20 }
      }
} while (errno =3D=3D=20 EADDRINUSE);

if (listen(s, 1) < 0)=20 {
     syslog(LOG_ERR, "Error listening on = socket:=20 %m");
     = close(s);
    =20 return -1;
   }

   *listenport =3D = port;
  =20 syslog(LOG_INFO, "Established listener on port: %i",=20 port);
   return s;
)

----------------------------------------------------------------= ---------------

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