UDP Socket Broadcasting SEC:U

QNX Newsgroups (Archives) comp.os.qnx
1

I’m using QNX 4.25 and have installed the TCP/IP & DTK. I want to
braodcast a message using a SOCK_DGRAM socket.

  • What do I set the setsockopt() to?
  • Do I need to do this?
  • What is the broadcast IP address for a UDP socket as required in the
    sockaddr_in structure?
2

Tony Wright <tony.wright@dsto.defence.gov.au> wrote:
: I’m using QNX 4.25 and have installed the TCP/IP & DTK. I want to
: braodcast a message using a SOCK_DGRAM socket.
: - What do I set the setsockopt() to?

SO_BROADCAST

: - Do I need to do this?

Yes

: - What is the broadcast IP address for a UDP socket as required in the
: sockaddr_in structure?

Depends on whether you want to do a subnet, network or limited
broadcast (INADDR_BROADCAST).

-seanb