Open C Sockets: getsockname method

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Created: polaka_sr (17 Jun 2008)

Last edited: hamishwillee (08 Feb 2012)

• getsockname - gets socket name

int getsockname (int s, struct sockaddr * restrict name, socklen_t * restrict namelen);

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).

Following is the usage of getsockname function:

#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);
}

Wiki Links

Open C Sockets Overview