82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
|
/*
|
||
|
|
* This part for NCR UNIX with is from Andrew Maffei (arm@aqua.whoi.edu). It
|
||
|
|
* assumes TLI throughout. In order to look up endpoint address information
|
||
|
|
* we must talk to the "timod" streams module. For some reason "timod" wants
|
||
|
|
* to sit directly on top of the device driver. Therefore we pop off all
|
||
|
|
* streams modules except the driver, install the "timod" module so that we
|
||
|
|
* can figure out network addresses, and then restore the original state.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef lint
|
||
|
|
static char sccsid[] = "@(#) ncr.c 1.1 94/12/28 17:42:34";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <syslog.h>
|
||
|
|
#include <sys/tiuser.h>
|
||
|
|
#include <stropts.h>
|
||
|
|
#include <sys/conf.h>
|
||
|
|
|
||
|
|
#include "tcpd.h"
|
||
|
|
|
||
|
|
#define MAX_MODULE_COUNT 10 /* XXX */
|
||
|
|
|
||
|
|
/* fromhost - tear down the streams stack then rebuild it */
|
||
|
|
|
||
|
|
void fromhost(request)
|
||
|
|
struct request_info *request;
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
int num_mod;
|
||
|
|
struct str_list str_list;
|
||
|
|
struct str_mlist mod_buffer[MAX_MODULE_COUNT];
|
||
|
|
int fd = request->fd;
|
||
|
|
|
||
|
|
str_list.sl_nmods = MAX_MODULE_COUNT;
|
||
|
|
str_list.sl_modlist = &mod_buffer[0];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* On systems with WIN streams support we have to be careful about what
|
||
|
|
* is on the stream we are passed. This code POPs off all modules above
|
||
|
|
* the pseudo driver, pushes timod, gets the host address information,
|
||
|
|
* pops timod and then pushes all modules back on the stream.
|
||
|
|
*
|
||
|
|
* Some state may be lost in this process. /usr/etc/tlid seems to do special
|
||
|
|
* things to the stream depending on the TCP port being serviced. (not a
|
||
|
|
* very nice thing to do!). It is unclear what to do if this code breaks
|
||
|
|
* - the stream may be left in an unknown condition.
|
||
|
|
*/
|
||
|
|
if ((num_mod = ioctl(fd, I_LIST, NULL)) < 0)
|
||
|
|
tcpd_warn("fromhost: LIST failed: %m");
|
||
|
|
if (ioctl(fd, I_LIST, &str_list) < 0)
|
||
|
|
tcpd_warn("fromhost: LIST failed: %m");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* POP stream modules except for the driver.
|
||
|
|
*/
|
||
|
|
for (i = 0; i < num_mod - 1; i++)
|
||
|
|
if (ioctl(fd, I_POP, 0) < 0)
|
||
|
|
tcpd_warn("fromhost: POP %s: %m", mod_buffer[i].l_name);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PUSH timod so that host address ioctls can be executed.
|
||
|
|
*/
|
||
|
|
if (ioctl(fd, I_PUSH, "timod") < 0)
|
||
|
|
tcpd_warn("fromhost: PUSH timod: %m");
|
||
|
|
tli_host(request);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* POP timod, we're done with it now.
|
||
|
|
*/
|
||
|
|
if (ioctl(fd, I_POP, 0) < 0)
|
||
|
|
tcpd_warn("fromhost: POP timod: %m");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Restore stream modules.
|
||
|
|
*/
|
||
|
|
for (i = num_mod - 2; i >= 0; i--)
|
||
|
|
if (ioctl(fd, I_PUSH, mod_buffer[i].l_name) < 0)
|
||
|
|
tcpd_warn("fromhost: PUSH %s: %m", mod_buffer[i].l_name);
|
||
|
|
}
|