1#include <errno.h>
2#include <string.h>
3#include <sys/types.h>
4#include <netinet/in.h>
5#include <linux/mpls.h>
6
7#include "utils.h"
8
9
10static int mpls_pton1(const char *name, struct mpls_label *addr)
11{
12	char *endp;
13	unsigned count;
14
15	for (count = 0; count < MPLS_MAX_LABELS; count++) {
16		unsigned long label;
17
18		label = strtoul(name, &endp, 0);
19		/* Fail when the label value is out or range */
20		if (label >= (1 << 20))
21			return 0;
22
23		if (endp == name) /* no digits */
24			return 0;
25
26		addr->entry = htonl(label << MPLS_LS_LABEL_SHIFT);
27		if (*endp == '\0') {
28			addr->entry |= htonl(1 << MPLS_LS_S_SHIFT);
29			return 1;
30		}
31
32		/* Bad character in the address */
33		if (*endp != '/')
34			return 0;
35
36		name = endp + 1;
37		addr += 1;
38	}
39	/* The address was too long */
40	return 0;
41}
42
43int mpls_pton(int af, const char *src, void *addr)
44{
45	int err;
46
47	switch(af) {
48	case AF_MPLS:
49		errno = 0;
50		err = mpls_pton1(src, (struct mpls_label *)addr);
51		break;
52	default:
53		errno = EAFNOSUPPORT;
54		err = -1;
55	}
56
57	return err;
58}
59