program that broadcasts

[Themuppeteer]

I wanna write a progra mthat broadcass a message over the network.But I'm having a problems...

I'm using udp
and my "sockaddr_in" var is build like this:

struct sockaddr_in to;
to.sin_family = AF_INET;
to.sin_addr.s_addr= inet_addr("255.255.255.255"
to.sin_port=htons(9000);
cout<<sendto(sockfd,buffer,strlen(buffer),0,
(struct sockaddr*)(&to),sizeof(sockaddr_in))<<endl;
close(sockfd);

(With sockfd being initialized well)
When I take IP 255.255.255.255 sendto returns -1,but when
I take somthing else 127.0.0.1 (works )or 150.158.x.y (works with certain ip's)

Can anyone explain please? And especially how to broadcast ?
(and to accept a broadcast)

thnx a lot!


Belgium 2 - Japan 0 !! X-) Greetz,

The Muppeteer.

themuppeteer@hotmail.com

http://www.themuppeteer.tk

Don't eat yellow snow...

 

[Guest_imported]

hi ,
u have to use setsockopt (),
one of the option is BROADCAST
that will solve ur problem.
ashish

 

[Themuppeteer]

Thnx a lot !
I'd give you a star,but you're not a member... (might be a good time to become one X-)) Greetz,

The Muppeteer.

themuppeteer@hotmail.com

http://www.themuppeteer.tk

Don't eat yellow snow...