CODEWITHSUNDEEP
csocketsudpportbind
ABC
ABC

Reputation: 91

bind() error : Cannot assign requested address

bind () error : Cannot assign requested address.

new_socket= socket(AF_INET, SOCK_DGRAM, 0);
       
    localIP = "128.1.1.64";

    memset(&socket_data, 0, sizeof(socket_data));
    
    // Fill the socket structure
    socket_data.sin_family      = AF_INET;
    socket_data.sin_addr.s_addr = inet_addr(localIP);
    socket_data.sin_port        = htons(PortNumber);
bind( new_socket, (struct sockaddr*) &socket_data, sizeof(socket_data))

Does any one know why the bind() is failing?

Upvotes: 2

Views: 2795

Answers (2)

Remy Lebeau
Remy Lebeau

Reputation: 597941

You can only bind() to an IP that has been assigned to one of the network interfaces of the local machine.

Upvotes: 1

Daniel Zheng
Daniel Zheng

Reputation: 53

I guess 128.1.1.64 is an arbitrary IP which does not exist in any of your net interfaces. If you want to spoof the source IP, probably you need to use SOCK_RAW instead.

Upvotes: 2

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