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/* $OpenBSD: ui.c,v 1.4 1998/12/21 01:02:27 niklas Exp $ */
/* $EOM: ui.c,v 1.26 1998/12/19 09:18:17 niklas Exp $ */
/*
* Copyright (c) 1998 Niklas Hallqvist. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This code was written under funding by Ericsson Radio Systems.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "conf.h"
#include "doi.h"
#include "exchange.h"
#include "isakmp.h"
#include "log.h"
#include "sa.h"
#include "transport.h"
#include "ui.h"
#include "util.h"
#define BUF_SZ 256
char *ui_fifo = FIFO;
int ui_socket;
/* Create and open the FIFO used for user control. */
void
ui_init ()
{
/* -f- means control messages comes in via stdin. */
if (strcmp (ui_fifo, "-") == 0)
ui_socket = 0;
else
{
/* No need to know about errors. */
unlink (ui_fifo);
if (mkfifo (ui_fifo, 0600) == -1)
log_fatal ("mkfifo");
/* XXX Is O_RDWR needed on some OSes? Photurisd seems to imply that. */
ui_socket = open (ui_fifo, O_RDONLY | O_NONBLOCK, 0);
if (ui_socket == -1)
log_fatal (ui_fifo);
}
}
/* New style connect. */
static void
ui_connect (char *cmd)
{
char name[81];
if (sscanf (cmd, "C %80s", name) != 1)
{
log_print ("ui_connect: command \"%s\" malformed", cmd);
return;
}
exchange_establish (name, 0, 0);
}
static void
ui_delete (char *cmd)
{
char cookies_str[ISAKMP_HDR_COOKIES_LEN * 2 + 1];
char message_id_str[ISAKMP_HDR_MESSAGE_ID_LEN * 2 + 1];
u_int8_t cookies[ISAKMP_HDR_COOKIES_LEN];
u_int8_t message_id_buf[ISAKMP_HDR_MESSAGE_ID_LEN];
u_int8_t *message_id = message_id_buf;
struct sa *sa;
if (sscanf (cmd, "d %32s %8s", cookies_str, message_id_str) != 2)
{
log_print ("ui_delete: command \"%s\" malformed", cmd);
return;
}
if (strcmp (message_id_str, "-") == 0)
message_id = 0;
if (hex2raw (cookies_str, cookies, ISAKMP_HDR_COOKIES_LEN) == -1
|| (message_id && hex2raw (message_id_str, message_id_buf,
ISAKMP_HDR_MESSAGE_ID_LEN) == -1))
{
log_print ("ui_delete: command \"%s\" has bad arguments", cmd);
return;
}
sa = sa_lookup (cookies, message_id);
if (!sa)
{
log_print ("ui_delete: command \"%s\" found no SA", cmd);
return;
}
sa_delete (sa, 1);
}
/* Parse the debug command found in CMD. */
static void
ui_debug (char *cmd)
{
int cls, level;
if (sscanf (cmd, "D %d %d", &cls, &level) != 2)
{
log_print ("ui_debug: command \"%s\" malformed", cmd);
return;
}
log_debug_cmd (cls, level);
}
/* Report SAs and ongoing exchanges. */
void
ui_report (char *cmd)
{
sa_report ();
exchange_report ();
}
/*
* Call the relevant command handler based on the first character of the
* line (the command).
*/
static void
ui_handle_command (char *line)
{
/* Find out what one-letter command was sent. */
switch (line[0])
{
case 'c':
ui_connect (line);
break;
case 'd':
ui_delete (line);
break;
case 'D':
ui_debug (line);
break;
case 'r':
ui_report (line);
break;
default:
log_print ("ui_handle_messages: unrecognized command: '%c'", line[0]);
}
}
/*
* A half-complex implementation of reading from a file descriptor
* line by line without resorting to stdio which apparently have
* troubles with non-blocking fifos.
*/
void
ui_handler ()
{
static char *buf = 0;
static char *p;
static size_t sz;
static size_t resid;
size_t n;
char *new_buf;
/* If no buffer, set it up. */
if (!buf)
{
sz = BUF_SZ;
buf = malloc (sz);
if (!buf)
{
log_print ("malloc (%d) failed", sz);
return;
}
p = buf;
resid = sz;
}
/* If no place left in the buffer reallocate twice as large. */
if (!resid)
{
new_buf = realloc (buf, sz * 2);
if (!new_buf)
{
log_print ("realloc (%p, %d) failed", buf, sz * 2);
free (buf);
buf = 0;
return;
}
buf = new_buf;
p = buf + sz;
resid = sz;
sz *= 2;
}
n = read (ui_socket, p, resid);
if (n == -1)
{
log_error ("read (%d, %p, %d)", ui_socket, p, resid);
return;
}
if (!n)
return;
resid -= n;
while (n--)
{
/*
* When we find a newline, cut off the line and feed it to the
* command processor. Then move the rest up-front.
*/
if (*p == '\n')
{
*p = '\0';
ui_handle_command (buf);
memcpy (buf, p + 1, n);
p = buf;
resid = sz - n;
continue;
}
p++;
}
}
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