1. We have a socket which is bound to the local IP address of the machine i.e the IP of the machice on which the application is running. The sample code is as pasted below, s = socket(PF_INET, SOCK_DGRAM, 0); bool reuse = 1; struct sockaddr_in srv_addr; memset(&srv_addr,0,sizeof(srv_addr)); srv_addr.sin_family = PF_INET; srv_addr.sin_addr.s_addr = inet_addr(ipaddr); srv_addr.sin_port = htons(port); // example port is 7000 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&reuse, sizeof(reuse)); bind(s, (LPSOCKADDR)&srv_addr, sizeof(srv_addr)); 2. There is another piece of code where we write data; The same socket created above then is used in sendto() like below sendto(s, msg, bytesToSend, 0, (SOCKADDR *)&Addr, sizeof(Addr)); The send to function fails with error code 10049; The same code used to work on WinXP below is the way in which the Addr, sturcture is filled Note: we have used the loopback address memset(&Addr,0,sizeof(Addr)); Addr.sin_family = AF_INET; Addr.sin_addr.s_addr = inet_addr("127.0.0.1" ); //Will be in Network Byte Order Addr.sin_port = htons(port); //same port as the one mentioned in step 1; example 7000 memset(&(replicationAddr.sin_zero), '\0', 8); // zero the rest of the struct Has anyone faced this issue and found the reason for it. Also is there any workaround for this? Thanks.

1. Perhaps the developer forum is better platform for your problem 2. sento() in heading is typo error 3. Syntax http://msdn.microsoft.com/en-us/library/windows/desktop/ms740148(v=vs.85).aspx 4. Error codes http://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx Rgds Milos

1. We have a socket which is bound to the local IP address of the machine i.e the IP of the machice on which the application is running. The sample code is as pasted below, s = socket(PF_INET, SOCK_DGRAM, 0); bool reuse = 1; struct sockaddr_in srv_addr; memset(&srv_addr,0,sizeof(srv_addr)); srv_addr.sin_family = PF_INET; srv_addr.sin_addr.s_addr = inet_addr(ipaddr); srv_addr.sin_port = htons(port); // example port is 7000 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&reuse, sizeof(reuse)); bind(s, (LPSOCKADDR)&srv_addr, sizeof(srv_addr)); 2. There is another piece of code where we write data; The same socket created above then is used in sendto() like below sendto(s, msg, bytesToSend, 0, (SOCKADDR *)&Addr, sizeof(Addr)); The send to function fails with error code 10049; The same code used to work on WinXP below is the way in which the Addr, sturcture is filled Note: we have used the loopback address memset(&Addr,0,sizeof(Addr)); Addr.sin_family = AF_INET; Addr.sin_addr.s_addr = inet_addr("127.0.0.1" ); //Will be in Network Byte Order Addr.sin_port = htons(port); //same port as the one mentioned in step 1; example 7000 memset(&(replicationAddr.sin_zero), '\0', 8); // zero the rest of the struct The firewall is already disabled Has anyone faced this issue and found the reason for it. Also is there any workaround for this? Thanks.

Are you sure your port is right? Maybe port is zero?

Hi shraddha_k, I found you have posted a similar thread in Windows 7 Networking forum. I'd like to merge them to keep in the same topic. Thanks for your understanding. Best regards,Helen Zhao [MSFT] MSDN Community Support | Feedback to us

Yes, the port is correct. it is not zero

Hi Helen, If you see the thread above, Milos had asked me to post this question in the Developer forum as it is much more relevant there. I would appreciate it to be kept there itself so that I get my query answered Thanks