1#include <errno.h>
2#include <sys/types.h>
3#include <netinet/in.h>
4
5#include "utils.h"
6
7static __inline__ u_int16_t dn_htons(u_int16_t addr)
8{
9        union {
10                u_int8_t byte[2];
11                u_int16_t word;
12        } u;
13
14        u.word = addr;
15        return ((u_int16_t)u.byte[0]) | (((u_int16_t)u.byte[1]) << 8);
16}
17
18
19static int dnet_num(const char *src, u_int16_t * dst)
20{
21	int rv = 0;
22	int tmp;
23	*dst = 0;
24
25	while ((tmp = *src++) != 0) {
26		tmp -= '0';
27		if ((tmp < 0) || (tmp > 9))
28			return rv;
29
30		rv++;
31		(*dst) *= 10;
32		(*dst) += tmp;
33	}
34
35	return rv;
36}
37
38static int dnet_pton1(const char *src, struct dn_naddr *dna)
39{
40	u_int16_t area = 0;
41	u_int16_t node = 0;
42	int pos;
43
44	pos = dnet_num(src, &area);
45	if ((pos == 0) || (area > 63) || (*(src + pos) != '.'))
46		return 0;
47	pos = dnet_num(src + pos + 1, &node);
48	if ((pos == 0) || (node > 1023))
49		return 0;
50	dna->a_len = 2;
51	*(u_int16_t *)dna->a_addr = dn_htons((area << 10) | node);
52
53	return 1;
54}
55
56int dnet_pton(int af, const char *src, void *addr)
57{
58	int err;
59
60	switch (af) {
61	case AF_DECnet:
62		errno = 0;
63		err = dnet_pton1(src, (struct dn_naddr *)addr);
64		break;
65	default:
66		errno = EAFNOSUPPORT;
67		err = -1;
68	}
69
70	return err;
71}
72