You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
1.7 KiB
101 lines
1.7 KiB
#include <errno.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include "utils.h"
|
|
|
|
static __inline__ u_int16_t dn_ntohs(u_int16_t addr)
|
|
{
|
|
union {
|
|
u_int8_t byte[2];
|
|
u_int16_t word;
|
|
} u;
|
|
|
|
u.word = addr;
|
|
return ((u_int16_t)u.byte[0]) | (((u_int16_t)u.byte[1]) << 8);
|
|
}
|
|
|
|
static __inline__ int do_digit(char *str, u_int16_t *addr, u_int16_t scale, size_t *pos, size_t len, int *started)
|
|
{
|
|
u_int16_t tmp = *addr / scale;
|
|
|
|
if (*pos == len)
|
|
return 1;
|
|
|
|
if (((tmp) > 0) || *started || (scale == 1)) {
|
|
*str = tmp + '0';
|
|
*started = 1;
|
|
(*pos)++;
|
|
*addr -= (tmp * scale);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const char *dnet_ntop1(const struct dn_naddr *dna, char *str, size_t len)
|
|
{
|
|
u_int16_t addr, area;
|
|
size_t pos = 0;
|
|
int started = 0;
|
|
|
|
memcpy(&addr, dna->a_addr, sizeof(addr));
|
|
addr = dn_ntohs(addr);
|
|
area = addr >> 10;
|
|
|
|
if (dna->a_len != 2)
|
|
return NULL;
|
|
|
|
addr &= 0x03ff;
|
|
|
|
if (len == 0)
|
|
return str;
|
|
|
|
if (do_digit(str + pos, &area, 10, &pos, len, &started))
|
|
return str;
|
|
|
|
if (do_digit(str + pos, &area, 1, &pos, len, &started))
|
|
return str;
|
|
|
|
if (pos == len)
|
|
return str;
|
|
|
|
*(str + pos) = '.';
|
|
pos++;
|
|
started = 0;
|
|
|
|
if (do_digit(str + pos, &addr, 1000, &pos, len, &started))
|
|
return str;
|
|
|
|
if (do_digit(str + pos, &addr, 100, &pos, len, &started))
|
|
return str;
|
|
|
|
if (do_digit(str + pos, &addr, 10, &pos, len, &started))
|
|
return str;
|
|
|
|
if (do_digit(str + pos, &addr, 1, &pos, len, &started))
|
|
return str;
|
|
|
|
if (pos == len)
|
|
return str;
|
|
|
|
*(str + pos) = 0;
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
const char *dnet_ntop(int af, const void *addr, char *str, size_t len)
|
|
{
|
|
switch(af) {
|
|
case AF_DECnet:
|
|
errno = 0;
|
|
return dnet_ntop1((struct dn_naddr *)addr, str, len);
|
|
default:
|
|
errno = EAFNOSUPPORT;
|
|
}
|
|
|
|
return NULL;
|
|
}
|