bind Invalid argument

c, network-programming, sockets

Solution

The problem is that you're trying to bind more than once -- what's with the `while(1)` loop?

while(1) {
    /* bind the socket to the port specified above */
    if(bind(socket_desc,(struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("Error");
        exit(-1);
    }
}

`bind()` succeeds the first time, and on the subsequent call it fails with `EINVAL`, which means (from `man 2 bind`):

[EINVAL] socket is already bound to an address and the protocol does not support binding to a new address. Alternatively, socket may have been shut down.

As a side note, it's probably a good idea to zero out the `sockaddr` prior to passing it in:

#include <string.h>
/* ... */

memset(&address, 0, sizeof(address));

address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);

Problem

I'm playing with the unix sockets. The code compiles fine but I get the following message on execute ``` Invalid argument ``` Here is the code i use. It's pretty simple I think ``` #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <stdlib.h> #define PORT 7000 int main(){ int socket_desc; struct sockaddr_in address; socket_desc = socket(AF_INET, SOCK_STREAM, 0); if(socket_desc == -1) perror("Create socket"); /* type of socket created in socket() */ address.sin_family = AF_INET; address.sin_addr.s_addr = INADDR_ANY; /* set port */ address.sin_port = htons(PORT); while(1) { /* bind the socket to the port specified above */ if(bind(socket_desc,(struct sockaddr *)&address, sizeof(address)) < 0) { perror("Error"); exit(-1); } } return 0; } ```

Original source