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Long Peng(deleted)
03/11/2016 9:31 AM
post115945
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Hi Guys,
I have a problem with the UDP socket.
The code is following:
---------------------------------------------
if ((sock_broadcast= socket(AF_INET, SOCK_DGRAM, 0)) < 00) {
printf("socket creation error\n");
}
//set broadcasting socket options
const int opt = 1;
extern int errno;
if (setsockopt(sock_broadcast, SOL_SOCKET, SO_REUSEPORT | SO_BROADCAST | SO_KEEPALIVE,
(char *) &opt, sizeof(opt)) < 0) {
printf("[set socket options error...%d\n", errno);
}
---------------------------------------------
I create a UDP socket, then I use setsockopt() to set the options with REUSE and BROADCAST. It always returns -1, but
the errno number is 0.
Do you have any solution to this problem?
Thanks in advance.
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Sean Boudreau(deleted)
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Re: Problem with UDP Socket
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Sean Boudreau(deleted)
03/11/2016 9:33 AM
post115946
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Re: Problem with UDP Socket
You need to include <errno.h> and get rid of 'extern int errno'.
errno is special.
On Fri, Mar 11, 2016 at 09:31:11AM -0500, Long Peng wrote:
> Hi Guys,
>
> I have a problem with the UDP socket.
>
> The code is following:
> ---------------------------------------------
> if ((sock_broadcast= socket(AF_INET, SOCK_DGRAM, 0)) < 00) {
> printf("socket creation error\n");
> }
>
> //set broadcasting socket options
> const int opt = 1;
> extern int errno;
> if (setsockopt(sock_broadcast, SOL_SOCKET, SO_REUSEPORT | SO_BROADCAST | SO_KEEPALIVE,
> (char *) &opt, sizeof(opt)) < 0) {
> printf("[set socket options error...%d\n", errno);
> }
> ---------------------------------------------
>
> I create a UDP socket, then I use setsockopt() to set the options with REUSE and BROADCAST. It always returns -1, but
the errno number is 0.
>
> Do you have any solution to this problem?
>
> Thanks in advance.
>
>
>
> _______________________________________________
>
> OSTech
> http://community.qnx.com/sf/go/post115945
> To cancel your subscription to this discussion, please e-mail ostech-core_os-unsubscribe@community.qnx.com
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Long Peng(deleted)
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Re: Problem with UDP Socket
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Long Peng(deleted)
03/11/2016 10:06 AM
post115947
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Re: Problem with UDP Socket
Hi Sean,
Thanks for your response. Now I get the errno.
But Why does setsockopt() return error ENOPROTOOPT ? 242 /* Protocol not available */.
I try to bind the socket. I also return error EADDRNOTAVAIL 249 /* Can't assign requested address */.
The code is like this:
bzero(&addr_broadcast, sizeof(struct sockaddr_in));
addr_broadcast.sin_family = AF_INET;
addr_broadcast.sin_addr.s_addr = htonl(INADDR_BROADCAST);
addr_broadcast.sin_port = htons(SOCK_BROADCAST_PORT);
if (bind(sock_broadcast, (struct sockaddr *) &(addr_broadcast), sizeof(struct sockaddr_in)) < 0) {
printf("bind sock_broadcast error...%d\n", errno);
}
Do you have any opinion? I am wondering if QNX UDP supports broadcasting, or I dis something wrong.
best regards,
Long
>
> You need to include <errno.h> and get rid of 'extern int errno'.
> errno is special.
>
> On Fri, Mar 11, 2016 at 09:31:11AM -0500, Long Peng wrote:
> > Hi Guys,
> >
> > I have a problem with the UDP socket.
> >
> > The code is following:
> > ---------------------------------------------
> > if ((sock_broadcast= socket(AF_INET, SOCK_DGRAM, 0)) < 00) {
> > printf("socket
> creation error\n");
> > }
> >
> > //set broadcasting socket options
> > const int opt = 1;
> > extern int errno;
> > if (setsockopt(sock_broadcast, SOL_SOCKET, SO_REUSEPORT | SO_BROADCAST |
> SO_KEEPALIVE,
> > (char *) &opt, sizeof(opt)) < 0) {
> > printf("[set socket options error...%d\n"
> , errno);
> > }
> > ---------------------------------------------
> >
> > I create a UDP socket, then I use setsockopt() to set the options with REUSE
> and BROADCAST. It always returns -1, but the errno number is 0.
> >
> > Do you have any solution to this problem?
> >
> > Thanks in advance.
> >
> >
> >
> > _______________________________________________
> >
> > OSTech
> > http://community.qnx.com/sf/go/post115945
> > To cancel your subscription to this discussion, please e-mail ostech-core_os
> -unsubscribe@community.qnx.com
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Sean Boudreau(deleted)
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Re: Problem with UDP Socket
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Sean Boudreau(deleted)
03/11/2016 10:08 AM
post115948
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Re: Problem with UDP Socket
You can't or in options. They're not flags.
On Fri, Mar 11, 2016 at 10:06:05AM -0500, Long Peng wrote:
> Hi Sean,
>
> Thanks for your response. Now I get the errno.
>
> But Why does setsockopt() return error ENOPROTOOPT ? 242 /* Protocol not available */.
>
> I try to bind the socket. I also return error EADDRNOTAVAIL 249 /* Can't assign requested address */.
>
> The code is like this:
> bzero(&addr_broadcast, sizeof(struct sockaddr_in));
> addr_broadcast.sin_family = AF_INET;
> addr_broadcast.sin_addr.s_addr = htonl(INADDR_BROADCAST);
> addr_broadcast.sin_port = htons(SOCK_BROADCAST_PORT);
>
> if (bind(sock_broadcast, (struct sockaddr *) &(addr_broadcast), sizeof(struct sockaddr_in)) < 0) {
> printf("bind sock_broadcast error...%d\n", errno);
> }
>
>
> Do you have any opinion? I am wondering if QNX UDP supports broadcasting, or I dis something wrong.
>
>
> best regards,
> Long
>
> >
> > You need to include <errno.h> and get rid of 'extern int errno'.
> > errno is special.
> >
> > On Fri, Mar 11, 2016 at 09:31:11AM -0500, Long Peng wrote:
> > > Hi Guys,
> > >
> > > I have a problem with the UDP socket.
> > >
> > > The code is following:
> > > ---------------------------------------------
> > > if ((sock_broadcast= socket(AF_INET, SOCK_DGRAM, 0)) < 00) {
> > > printf("socket
> > creation error\n");
> > > }
> > >
> > > //set broadcasting socket options
> > > const int opt = 1;
> > > extern int errno;
> > > if (setsockopt(sock_broadcast, SOL_SOCKET, SO_REUSEPORT | SO_BROADCAST |
> > SO_KEEPALIVE,
> > > (char *) &opt, sizeof(opt)) < 0) {
> > > printf("[set socket options error...%d\n"
> > , errno);
> > > }
> > > ---------------------------------------------
> > >
> > > I create a UDP socket, then I use setsockopt() to set the options with REUSE
> > and BROADCAST. It always returns -1, but the errno number is 0.
> > >
> > > Do you have any solution to this problem?
> > >
> > > Thanks in advance.
> > >
> > >
> > >
> > > _______________________________________________
> > >
> > > OSTech
> > > http://community.qnx.com/sf/go/post115945
> > > To cancel your subscription to this discussion, please e-mail ostech-core_os
> > -unsubscribe@community.qnx.com
>
>
>
>
>
>
> _______________________________________________
>
> OSTech
> http://community.qnx.com/sf/go/post115947
> To cancel your subscription to this discussion, please e-mail ostech-core_os-unsubscribe@community.qnx.com
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Long Peng(deleted)
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Re: Problem with UDP Socket
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Long Peng(deleted)
03/12/2016 7:11 AM
post115951
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Re: Problem with UDP Socket
You are absolutely correct, Sean. There is no problem if I set the options one by one. They are not flags.
Thanks very much.
>
> You can't or in options. They're not flags.
>
> On Fri, Mar 11, 2016 at 10:06:05AM -0500, Long Peng wrote:
> > Hi Sean,
> >
> > Thanks for your response. Now I get the errno.
> >
> > But Why does setsockopt() return error ENOPROTOOPT ? 242
> /* Protocol not available */.
> >
> > I try to bind the socket. I also return error EADDRNOTAVAIL 249
> /* Can't assign requested address */.
> >
> > The code is like this:
> > bzero(&addr_broadcast, sizeof(struct sockaddr_in));
> > addr_broadcast.sin_family = AF_INET;
> > addr_broadcast.sin_addr.s_addr = htonl(INADDR_BROADCAST);
> > addr_broadcast.sin_port = htons(SOCK_BROADCAST_PORT);
> >
> > if (bind(sock_broadcast, (struct sockaddr *) &(addr_broadcast),
> sizeof(struct sockaddr_in)) < 0) {
> > printf("bind sock_broadcast error...%d\n",
> errno);
> > }
> >
> >
> > Do you have any opinion? I am wondering if QNX UDP supports broadcasting, or
> I dis something wrong.
> >
> >
> > best regards,
> > Long
> >
> > >
> > > You need to include <errno.h> and get rid of 'extern int errno'.
> > > errno is special.
> > >
> > > On Fri, Mar 11, 2016 at 09:31:11AM -0500, Long Peng wrote:
> > > > Hi Guys,
> > > >
> > > > I have a problem with the UDP socket.
> > > >
> > > > The code is following:
> > > > ---------------------------------------------
> > > > if ((sock_broadcast= socket(AF_INET, SOCK_DGRAM, 0)) < 00) {
> > > > printf("
> socket
> > > creation error\n");
> > > > }
> > > >
> > > > //set broadcasting socket options
> > > > const int opt = 1;
> > > > extern int errno;
> > > > if (setsockopt(sock_broadcast, SOL_SOCKET, SO_REUSEPORT | SO_BROADCAST
> |
> > > SO_KEEPALIVE,
> > > > (char *) &opt, sizeof(opt)) < 0) {
> > > > printf("[set socket options error
> ...%d\n"
> > > , errno);
> > > > }
> > > > ---------------------------------------------
> > > >
> > > > I create a UDP socket, then I use setsockopt() to set the options with
> REUSE
> > > and BROADCAST. It always returns -1, but the errno number is 0.
> > > >
> > > > Do you have any solution to this problem?
> > > >
> > > > Thanks in advance.
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > >
> > > > OSTech
> > > > http://community.qnx.com/sf/go/post115945
> > > > To cancel your subscription to this discussion, please e-mail ostech-
> core_os
> > > -unsubscribe@community.qnx.com
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> >
> > OSTech
> > http://community.qnx.com/sf/go/post115947
> > To cancel your subscription to this discussion, please e-mail ostech-core_os
> -unsubscribe@community.qnx.com
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