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/*
* lib/ax25.c This file contains an implementation of the "AX.25"
* support functions.
*
* Version: $Id: ax25.c,v 1.9 1999/09/27 11:00:45 philip Exp $
*
* NOTE: I will redo this module as soon as I got the libax25.a
* library sorted out. This library contains some useful
* and often used address conversion functions, database
* lookup stuff, and more of the like.
*
* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
* Copyright 1993 MicroWalt Corporation
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*/
#include "config.h"
#if HAVE_AFAX25 || HAVE_HWAX25
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
#include <netax25/ax25.h>
#else
#include <linux/ax25.h>
#endif
#include <net/if_arp.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "net-support.h"
#include "pathnames.h"
#include "intl.h"
#include "util.h"
static char AX25_errmsg[128];
extern struct aftype ax25_aftype;
static char *AX25_print(unsigned char *ptr)
{
static char buff[8];
int i;
for (i = 0; i < 6; i++) {
buff[i] = ((ptr[i] & 0377) >> 1);
if (buff[i] == ' ')
buff[i] = '\0';
}
buff[6] = '\0';
i = ((ptr[6] & 0x1E) >> 1);
if (i != 0)
sprintf(&buff[strlen(buff)], "-%d", i);
return (buff);
}
/* Display an AX.25 socket address. */
static char *
AX25_sprint(struct sockaddr *sap, int numeric)
{
static char buf[64];
if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
return safe_strncpy(buf, _("[NONE SET]"), sizeof(buf));
return (AX25_print(((struct sockaddr_ax25 *) sap)->sax25_call.ax25_call));
}
static int AX25_input(int type, char *bufp, struct sockaddr *sap)
{
unsigned char *ptr;
char *orig, c;
int i;
sap->sa_family = ax25_aftype.af;
ptr = ((struct sockaddr_ax25 *) sap)->sax25_call.ax25_call;
/* First, scan and convert the basic callsign. */
orig = bufp;
i = 0;
while ((*bufp != '\0') && (*bufp != '-') && (i < 6)) {
c = *bufp++;
if (islower(c))
c = toupper(c);
if (!(isupper(c) || isdigit(c))) {
safe_strncpy(AX25_errmsg, _("Invalid callsign"), sizeof(AX25_errmsg));
#ifdef DEBUG
fprintf(stderr, "ax25_input(%s): %s !\n", AX25_errmsg, orig);
#endif
errno = EINVAL;
return (-1);
}
*ptr++ = (unsigned char) ((c << 1) & 0xFE);
i++;
}
/* Callsign too long? */
if ((i == 6) && (*bufp != '-') && (*bufp != '\0')) {
strcpy(AX25_errmsg, _("Callsign too long"));
#ifdef DEBUG
fprintf(stderr, "ax25_input(%s): %s !\n", AX25_errmsg, orig);
#endif
errno = E2BIG;
return (-1);
}
/* Nope, fill out the address bytes with blanks. */
while (i++ < sizeof(ax25_address) - 1) {
*ptr++ = (unsigned char) ((' ' << 1) & 0xFE);
}
/* See if we need to add an SSID field. */
if (*bufp == '-') {
i = atoi(++bufp);
*ptr = (unsigned char) ((i << 1) & 0xFE);
} else {
*ptr = (unsigned char) '\0';
}
/* All done. */
#ifdef DEBUG
fprintf(stderr, "ax25_input(%s): ", orig);
for (i = 0; i < sizeof(ax25_address); i++)
fprintf(stderr, "%02X ", sap->sa_data[i] & 0377);
fprintf(stderr, "\n");
#endif
return (0);
}
/* Display an error message. */
static void AX25_herror(char *text)
{
if (text == NULL)
fprintf(stderr, "%s\n", AX25_errmsg);
else
fprintf(stderr, "%s: %s\n", text, AX25_errmsg);
}
static int AX25_hinput(char *bufp, struct sockaddr *sap)
{
if (AX25_input(0, bufp, sap) < 0)
return (-1);
sap->sa_family = ARPHRD_AX25;
return (0);
}
#if 0
/* Set the line discipline of a terminal line. */
static int KISS_set_disc(int fd, int disc)
{
if (ioctl(fd, TIOCSETD, &disc) < 0) {
fprintf(stderr, "KISS_set_disc(%d): %s\n", disc, strerror(errno));
return (-errno);
}
return (0);
}
/* Start the KISS encapsulation on the file descriptor. */
static int KISS_init(int fd)
{
if (KISS_set_disc(fd, N_SLIP) < 0)
return (-1);
if (ioctl(fd, SIOCSIFENCAP, 4) < 0)
return (-1);
return (0);
}
#endif
struct hwtype ax25_hwtype =
{
"ax25", NULL, /*"AMPR AX.25", */ ARPHRD_AX25, 7,
AX25_print, AX25_hinput, NULL
};
struct aftype ax25_aftype =
{
"ax25", NULL, /*"AMPR AX.25", */ AF_AX25, 7,
AX25_print, AX25_sprint, AX25_input, AX25_herror,
NULL, NULL, NULL,
-1,
"/proc/net/ax25"
};
#endif /* HAVE_xxAX25 */
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