Re: [lwip-users] netconn_bind crashes when ip_addr is NULL

[leon . woestenberg]

Hello,

Just like IP_ADDR_BROADCAST is a pointer to { 0xffffffffUL } (255.255.255.255),
IP_ADDR_ANY now is a pointer to { 0UL } (0.0.0.0).

I would suggest replacing NULL by IP_ADDR_ANY (and changing the API as
such).

I have restored the behaviour where ip_addr_set() handles NULL as
IP_ADDR_ANY in current CVS.

The exact behaviour should be that the binding is host-wide (i.e. not limited
to exactly one interface).

Regards,

Leon.

Sergio PérezAlcañiz <address@hidden> Sent by: address@hidden 15-04-2003 10:44 Please respond to Mailing list for lwIP users

To:        address@hidden         cc:                 Subject:        [lwip-users] netconn_bind crashes when ip_addr is NULL

Hello, I've just ported the latest CVS version of lwIP to RT-Linux, and one
example I wrote for the before porting (0.5.3) crashes now when trying to bind
to a localhost ip_addr (when using the sequential API). The line marked with
---> crashes then ipaddr is NULL. In the previous version (0.5.3) binding to
NULL meant that the udpserver got binded to the default local ip_addr. Maybe the
meaning of this has changed in the latest version???

  static struct netconn *conn;
  static struct netbuf *buf;
  char buffer[4096];
  struct ip_addr ipaddr;

  conn = netconn_new(NETCONN_UDP);

  IP4_ADDR(&ipaddr, 158,42,53,14);

----->   netconn_bind(conn, &ipaddr, 8);  //  netconn_bind(conn, NULL, 8);

  while(1) {
    buf = netconn_recv(conn);
    netbuf_copy(buf, buffer, sizeof(buffer));
    printf("----------- UDP echo server got: %s -------------\n", buffer);
    netbuf_delete(buf);
  }



Regards.
Sergio


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