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/*@@
@file Sockets.c
@date Wed Sep 13 20:39:15 2000
@author Tom Goodale
@desc
Routines which deal with sockets.
These should probably move into thorn Socket at some point if
they aren't already there.
@enddesc
@version $Header$
@@*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <sys/types.h>
#include "cctk.h"
#include "httpd.h"
static char *rcsid = "$Header$";
CCTK_FILEVERSION(DevThorns_httpd_Socket_c)
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
int HTTP_MakeSocket (unsigned long port);
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
/* Active file descriptors */
static fd_set active_fd_set;
/* Main server socket */
static int sock;
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine HTTP_SetupServer
@date Wed Sep 13 20:39:15 2000
@author Tom Goodale
@desc
Creates a socket to listen on.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_SetupServer(int port, int queue_size)
{
/* Create the socket and set it up to accept connections. */
sock = HTTP_MakeSocket (port);
if (listen (sock, queue_size) < 0)
{
perror ("listen");
exit (EXIT_FAILURE);
}
/* Initialize the set of active sockets. */
FD_ZERO (&active_fd_set);
FD_SET (sock, &active_fd_set);
return 0;
}
/*@@
@routine HTTP_ShutdownServer
@date Wed Sep 13 20:39:15 2000
@author Tom Goodale
@desc
Closes all sockets we are interested in.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_ShutdownServer(void)
{
int i;
/* Close all sockets in our active set */
for(i = FD_SETSIZE-1; i >=0; i--)
{
if(FD_ISSET(i, &active_fd_set))
{
close(i);
}
}
return 0;
}
/*@@
@routine HTTP_Poll
@date Wed Sep 13 20:39:15 2000
@author Tom Goodale
@desc
Main workhorse routine.
Looks for activity on any of the sockets which are open
and dispatches work.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_Poll(cGH *cctkGH, long sec, long usec)
{
int i;
#ifdef HAVE_SOCKLEN_T
socklen_t size;
#else
int size;
#endif
fd_set read_fd_set;
struct sockaddr_in clientname;
struct timeval timeout;
timeout.tv_sec = sec;
timeout.tv_usec = usec;
/* Block until input arrives on one or more active sockets. */
read_fd_set = active_fd_set;
if (select (FD_SETSIZE, &read_fd_set, NULL, NULL, &timeout) < 0)
{
perror ("select");
exit (EXIT_FAILURE);
}
/* Service all the sockets with input pending. */
for (i = 0; i < FD_SETSIZE; ++i)
{
if (FD_ISSET (i, &read_fd_set))
{
if (i == sock)
{
/* Connection request on original socket. */
int new;
size = sizeof (clientname);
new = accept (sock,
(struct sockaddr *) &clientname,
&size);
if (new < 0)
{
perror ("accept");
exit (EXIT_FAILURE);
}
fprintf (stderr,
"Server: connect from host %s, port %hd.\n",
inet_ntoa (clientname.sin_addr),
ntohs (clientname.sin_port));
FD_SET (new, &active_fd_set);
}
else
{
/* Data arriving on an already-connected socket. */
if (HTTP_ReadFromClient (cctkGH, i) < 0)
{
close (i);
FD_CLR (i, &active_fd_set);
}
}
}
}
return 0;
}
/********************************************************************
********************* Local Routines *************************
********************************************************************/
/*@@
@routine HTTP_MakeSocket
@date Wed Sep 13 20:39:15 2000
@author Tom Goodale
@desc
Creates a socket.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_MakeSocket (unsigned long port)
{
int sock;
struct sockaddr_in name;
/* Create the socket. */
sock = socket (PF_INET, SOCK_STREAM, 0);
if (sock < 0)
{
perror ("socket");
exit (EXIT_FAILURE);
}
/* Give the socket a name. */
name.sin_family = AF_INET;
name.sin_port = htons (port);
name.sin_addr.s_addr = htonl (INADDR_ANY);
if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0)
{
perror ("bind");
exit (EXIT_FAILURE);
}
return sock;
}
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