Very Computer

by **vide..** » Fri, 24 Mar 2000 04:00:00

Hello,

This is my program :

int sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

sockaddr_in a;

a.sin_family=AF_INET;
a,sin_port=htons(atoi(argv[1]));
a.sin_addr.s_addr=inet_addr("127.0.0.1");

if(bind(sock,(sockaddr*)&a,sizeof(sockaddr_in))<0)
cout<<"bind failed,errno="<<errno<<endl;

It generates "bind failed,errno=68" no matter what port I try to bind
to. Someone in the unix.programmer group suggested using
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,...) - I tried this and it's all
the same.

I don't understand why would the bind fail on all ports ? Has anyone
seen anything like this ? I would appreciate your help.

Thank you,

Martin

Sent via Deja.com http://www.deja.com/
Before you buy.

by **F. Michael Or** » Sat, 25 Mar 2000 04:00:00

> Hello,

> This is my program :

> int sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

> sockaddr_in a;

> a.sin_family=AF_INET;
> a,sin_port=htons(atoi(argv[1]));
> a.sin_addr.s_addr=inet_addr("127.0.0.1");

> if(bind(sock,(sockaddr*)&a,sizeof(sockaddr_in))<0)
> cout<<"bind failed,errno="<<errno<<endl;

> It generates "bind failed,errno=68" no matter what port I try to bind
> to. Someone in the unix.programmer group suggested using
> setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,...) - I tried this and it's all
> the same.

> I don't understand why would the bind fail on all ports ? Has anyone
> seen anything like this ? I would appreciate your help.

Two things I see. First, you should check the return from the socket()
call; make sure it isn't returning -1 and setting errno because of
something it doesn't like. Secondly, along those same lines, most of
the sockets documentation I have, which I have used to write my
programs, recommend leaving the third parameter of the socket() call to
0. I know that it says it will default to TCP for STREAM type sockets,
but it might be worth a shot.

--

F. Michael Orr
Sr. Systems Engineer
Norfolk Public Schools, Norfolk, VA, USA

by **Bernard Dhoogh** » Wed, 29 Mar 2000 04:00:00

There is a 8 byte part called sin_zero in sockaddr_in that is not used by
the application itself but that should be initialized to zero:

bzero((char *) &a,sizeof(a))

or

bzero(a.sin_port,8);

Bernard Dhooghe .

> Hello,

> This is my program :

> int sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

> sockaddr_in a;

> a.sin_family=AF_INET;
> a,sin_port=htons(atoi(argv[1]));
> a.sin_addr.s_addr=inet_addr("127.0.0.1");

> if(bind(sock,(sockaddr*)&a,sizeof(sockaddr_in))<0)
> cout<<"bind failed,errno="<<errno<<endl;

> It generates "bind failed,errno=68" no matter what port I try to bind
> to. Someone in the unix.programmer group suggested using
> setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,...) - I tried this and it's all
> the same.

> I don't understand why would the bind fail on all ports ? Has anyone
> seen anything like this ? I would appreciate your help.

> Thank you,

> Martin

> Sent via Deja.com http://www.deja.com/
> Before you buy.

Very Computer

errno 68 - EADDRNOTAVAIL on all ports

errno 68 - EADDRNOTAVAIL on all ports

errno 68 - EADDRNOTAVAIL on all ports

errno 68 - EADDRNOTAVAIL on all ports