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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "bacon-message-connection.h"
#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif
struct BaconMessageConnection {
gboolean is_server;
int fd;
char *path;
GIOChannel *chan;
/* callback */
void (*func) (const char *message, gpointer user_data);
gpointer data;
};
static gboolean
test_is_socket (const char *path)
{
struct stat s;
if (stat (path, &s) == -1)
return FALSE;
if (S_ISSOCK (s.st_mode))
return TRUE;
return FALSE;
}
#define BUF_SIZE 1024
static gboolean
server_cb (GIOChannel *source, GIOCondition condition, gpointer data)
{
BaconMessageConnection *conn = (BaconMessageConnection *)data;
char *message, buf[BUF_SIZE];
int cd, alen, rc, offset;
message = NULL;
offset = 0;
cd = accept (g_io_channel_unix_get_fd (source), NULL, &alen);
memset (buf, sizeof (buf), '\0');
rc = read (cd, buf, BUF_SIZE);
while (rc != 0)
{
message = g_realloc (message, rc + offset);
memcpy (message + offset, buf, MIN(rc, BUF_SIZE));
offset = offset + rc;
memset (buf, sizeof (buf), '\0');
rc = read (cd, buf, BUF_SIZE);
}
if (message != NULL && conn->func != NULL)
(*conn->func) (message, conn->data);
g_free (message);
return TRUE;
}
static gboolean
try_server (BaconMessageConnection *conn)
{
struct sockaddr_un uaddr;
GError *err = NULL;
uaddr.sun_family = AF_UNIX;
strncpy (uaddr.sun_path, conn->path,
MIN (strlen(conn->path)+1, UNIX_PATH_MAX));
conn->fd = socket (PF_UNIX, SOCK_STREAM, 0);
if (bind (conn->fd, (struct sockaddr *) &uaddr, sizeof (uaddr)) == -1)
{
conn->fd = -1;
return FALSE;
}
listen (conn->fd, 5);
conn->chan = g_io_channel_unix_new (conn->fd);
if (conn->chan == NULL || err != NULL)
{
conn->fd = -1;
return FALSE;
}
g_io_add_watch (conn->chan, G_IO_IN, server_cb, conn);
return TRUE;
}
static gboolean
try_client (BaconMessageConnection *conn)
{
struct sockaddr_un uaddr;
uaddr.sun_family = AF_UNIX;
strncpy (uaddr.sun_path, conn->path,
MIN(strlen(conn->path)+1, UNIX_PATH_MAX));
conn->fd = socket (PF_UNIX, SOCK_STREAM, 0);
if (connect (conn->fd, (struct sockaddr *) &uaddr,
sizeof (uaddr)) == -1)
{
conn->fd = -1;
return FALSE;
}
return TRUE;
}
BaconMessageConnection *
bacon_message_connection_new (const char *prefix)
{
BaconMessageConnection *conn;
char *filename, *path;
g_return_val_if_fail (prefix != NULL, NULL);
filename = g_strdup_printf ("%s.%s", prefix, g_get_user_name ());
path = g_build_filename (G_DIR_SEPARATOR_S, g_get_tmp_dir (),
filename, NULL);
g_free (filename);
conn = g_new0 (BaconMessageConnection, 1);
conn->path = path;
if (test_is_socket (conn->path) == FALSE)
{
try_server (conn);
if (conn->fd == -1)
{
bacon_message_connection_free (conn);
return NULL;
}
conn->is_server = TRUE;
return conn;
}
if (try_client (conn) == FALSE)
{
unlink (path);
try_server (conn);
if (conn->fd == -1)
{
bacon_message_connection_free (conn);
return NULL;
}
conn->is_server = TRUE;
return conn;
}
conn->is_server = FALSE;
return conn;
}
void
bacon_message_connection_free (BaconMessageConnection *conn)
{
g_return_if_fail (conn != NULL);
g_return_if_fail (conn->path != NULL);
if (conn->is_server == TRUE)
{
g_io_channel_shutdown (conn->chan, FALSE, NULL);
g_io_channel_unref (conn->chan);
unlink (conn->path);
} else {
close (conn->fd);
}
g_free (conn->path);
g_free (conn);
}
void
bacon_message_connection_set_callback (BaconMessageConnection *conn,
BaconMessageReceivedFunc func,
gpointer user_data)
{
g_return_if_fail (conn != NULL);
g_assert (conn->is_server == TRUE);
conn->func = func;
conn->data = user_data;
}
void
bacon_message_connection_send (BaconMessageConnection *conn,
const char *message)
{
g_return_if_fail (conn != NULL);
g_assert (conn->is_server == FALSE);
write (conn->fd, message, strlen (message) + 1);
}
gboolean
bacon_message_connection_get_is_server (BaconMessageConnection *conn)
{
g_return_val_if_fail (conn != NULL, FALSE);
return conn->is_server;
}
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