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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/socket.h>
#include <config.h>
#ifdef HAVE_NETAX25_AX25_H
#include <netax25/ax25.h>
#else
#include "kernel_ax25.h"
#endif
#ifdef HAVE_NETROSE_ROSE_H
#include <netrose/rose.h>
#else
#include "kernel_rose.h"
#endif
#include "axlib.h"
ax25_address null_ax25_address = {{0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00}};
/*
* Library routine for callsign conversion.
*/
int ax25_aton_entry(const char *name, char *buf)
{
int ct = 0;
int ssid = 0;
const char *p = name;
char c;
while (ct < 6) {
c = toupper(*p);
if (c == '-' || c == '\0')
break;
if (!isalnum(c)) {
printf("axutils: invalid symbol in callsign %s\n", name);
return -1;
}
buf[ct] = c << 1;
p++;
ct++;
}
while (ct < 6) {
buf[ct] = ' ' << 1;
ct++;
}
if (*p != '\0') {
p++;
if (sscanf(p, "%d", &ssid) != 1 || ssid < 0 || ssid > 15) {
printf("axutils: SSID must follow '-' and be numeric in the range 0-15 - %s\n", name);
return -1;
}
}
buf[6] = ((ssid + '0') << 1) & 0x1E;
return 0;
}
int ax25_aton(const char *call, struct full_sockaddr_ax25 *sax)
{
char *bp, *np;
char *addrp;
int n = 0;
char *tmp = strdup(call);
if (tmp == NULL)
return -1;
bp = tmp;
addrp = sax->fsa_ax25.sax25_call.ax25_call;
do {
/* Fetch one callsign token */
while (*bp != '\0' && isspace(*bp))
bp++;
np = bp;
while (*np != '\0' && !isspace(*np))
np++;
if (*np != '\0')
*np++ = '\0';
/* Check for the optional 'via' syntax */
if (n == 1 && (strcasecmp(bp, "V") == 0 || strcasecmp(bp, "VIA") == 0)) {
bp = np;
continue;
}
/* Process the token */
if (ax25_aton_entry(bp, addrp) == -1) {
free(tmp);
return -1;
}
/* Move along */
bp = np;
n++;
if (n == 1)
addrp = sax->fsa_digipeater[0].ax25_call; /* First digipeater address */
else
addrp += sizeof(ax25_address);
} while (n < AX25_MAX_DIGIS && *bp);
free(tmp);
/* Tidy up */
sax->fsa_ax25.sax25_ndigis = n - 1;
sax->fsa_ax25.sax25_family = AF_AX25;
return sizeof(struct full_sockaddr_ax25);
}
int ax25_aton_arglist(const char *call[], struct full_sockaddr_ax25 *sax)
{
char *bp;
char *addrp;
int n = 0;
int argp = 0;
addrp = sax->fsa_ax25.sax25_call.ax25_call;
do {
/* Fetch one callsign token */
if ((bp = call[argp++]) == NULL)
break;
/* Check for the optional 'via' syntax */
if (n == 1 && (strcasecmp(bp, "V") == 0 || strcasecmp(bp, "VIA") == 0))
continue;
/* Process the token */
if (ax25_aton_entry(bp, addrp) == -1)
return -1;
n++;
if (n == 1)
addrp = sax->fsa_digipeater[0].ax25_call; /* First digipeater address */
else
addrp += sizeof(ax25_address);
} while (n < AX25_MAX_DIGIS && call[argp] != NULL);
/* Tidy up */
sax->fsa_ax25.sax25_ndigis = n - 1;
sax->fsa_ax25.sax25_family = AF_AX25;
return sizeof(struct full_sockaddr_ax25);
}
/*
* Library routine for Rose address conversion.
*/
int rose_aton(const char *addr, char *buf)
{
int i, n;
if (strlen(addr) != 10) {
printf("axutils: invalid rose address length\n");
return -1;
}
if (strspn(addr, "0123456789") != 10) {
printf("axutils: invalid characters in address\n");
return -1;
}
for (n = 0, i = 0; i < 5; i++, n += 2) {
buf[i] = (addr[n + 0] - '0') << 4;
buf[i] |= (addr[n + 1] - '0') << 0;
}
return 0;
}
/*
* ax25 -> ascii conversion
*/
char *ax25_ntoa(const ax25_address *a)
{
static char buf[11];
char c, *s;
int n;
for (n = 0, s = buf; n < 6; n++) {
c = (a->ax25_call[n] >> 1) & 0x7F;
if (c != ' ') *s++ = c;
}
*s++ = '-';
if ((n = ((a->ax25_call[6] >> 1) & 0x0F)) > 9) {
*s++ = '1';
n -= 10;
}
*s++ = n + '0';
*s++ = '\0';
return buf;
}
/*
* rose -> ascii conversion
*/
char *rose_ntoa(const rose_address *a)
{
static char buf[11];
sprintf(buf, "%02X%02X%02X%02X%02X", a->rose_addr[0] & 0xFF,
a->rose_addr[1] & 0xFF,
a->rose_addr[2] & 0xFF,
a->rose_addr[3] & 0xFF,
a->rose_addr[4] & 0xFF);
return buf;
}
/*
* Compare two ax.25 addresses
*/
int ax25_cmp(const ax25_address *a, const ax25_address *b)
{
if ((a->ax25_call[0] & 0xFE) != (b->ax25_call[0] & 0xFE))
return 1;
if ((a->ax25_call[1] & 0xFE) != (b->ax25_call[1] & 0xFE))
return 1;
if ((a->ax25_call[2] & 0xFE) != (b->ax25_call[2] & 0xFE))
return 1;
if ((a->ax25_call[3] & 0xFE) != (b->ax25_call[3] & 0xFE))
return 1;
if ((a->ax25_call[4] & 0xFE) != (b->ax25_call[4] & 0xFE))
return 1;
if ((a->ax25_call[5] & 0xFE) != (b->ax25_call[5] & 0xFE))
return 1;
if ((a->ax25_call[6] & 0x1E) != (b->ax25_call[6] & 0x1E)) /* SSID without control bit */
return 2;
return 0;
}
/*
* Compare two Rose addresses
*/
int rose_cmp(const rose_address *a, const rose_address *b)
{
int i;
for (i = 0; i < 5; i++)
if (a->rose_addr[i] != b->rose_addr[i])
return 1;
return 0;
}
/*
* Validate an AX.25 callsign.
*/
int ax25_validate(const char *call)
{
unsigned char s[7];
int n;
for (n = 0; n < 6; n++)
s[n] = (call[n] >> 1) & 0x7F;
s[6] = '\0';
if (strspn(s, "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ ") == 6)
return TRUE;
return FALSE;
}
/*
* Convert a string to upper case
*/
char *strupr(const char *s)
{
char *p;
if (s == NULL)
return NULL;
for (p = s; *p != '\0'; p++)
*p = toupper(*p);
return s;
}
/*
* Convert a string to lower case
*/
char *strlwr(const char *s)
{
char *p;
if (s == NULL)
return NULL;
for (p = s; *p != '\0'; p++)
*p = tolower(*p);
return s;
}
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