Name

getsockname - gets socket name

Library

libc.lib

Synopsis

  #include <sys/types.h>
  #include <sys/socket.h>
  int getsockname (int s, struct sockaddr * restrict name, socklen_t * restrict namelen);

Return values

The getsockname() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

Detailed description

The getsockname system call returns the current name for the specified socket. The namelen argument should be initialized to indicate the amount of space pointed to by name. On return it contains the actual size of the name returned (in bytes).

Examples

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
TInt GetSockName()
{
   int sock_fd;
   struct sockaddr_in addr,ss;
   unsigned int len;   
   
   sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
       
   addr.sin_family = AF_INET;
   addr.sin_addr.s_addr = htonl(INADDR_ANY);
   addr.sin_port = htons(5000);
   bind(sock_fd,(struct sockaddr*)&addr,sizeof(addr));
 
  len=sizeof(ss);
  getsockname(sock_fd,(struct sockaddr*)&ss,&len);
  close(sock_fd);
}

Errors

The call succeeds unless:
[EBADF]
  The argument s is not a valid descriptor.
[ECONNRESET]
  The connection has been reset by the peer.
[ENOTSOCK]
  The argument s is a file, not a socket.
[ENOBUFS]
  Insufficient resources were available in the system to perform the operation.
[EFAULT]
  The name argument points to memory not in a valid part of the process address space.
[EINVAL]
  The namelen argument is not valid.

See also

bind, getpeername, socket
The getsockname system call appeared in BSD 4.2.

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