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/* SPDX-License-Identifier: GPL-2.0 */
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <linux/mpls.h>
#include "utils.h"
static int mpls_pton1(const char *name, struct mpls_label *addr,
unsigned int maxlabels)
{
char *endp;
unsigned count;
for (count = 0; count < maxlabels; count++) {
unsigned long label;
label = strtoul(name, &endp, 0);
/* Fail when the label value is out or range */
if (label >= (1 << 20))
return 0;
if (endp == name) /* no digits */
return 0;
addr->entry = htonl(label << MPLS_LS_LABEL_SHIFT);
if (*endp == '\0') {
addr->entry |= htonl(1 << MPLS_LS_S_SHIFT);
return 1;
}
/* Bad character in the address */
if (*endp != '/')
return 0;
name = endp + 1;
addr += 1;
}
/* The address was too long */
fprintf(stderr, "Error: too many labels.\n");
return 0;
}
int mpls_pton(int af, const char *src, void *addr, size_t alen)
{
unsigned int maxlabels = alen / sizeof(struct mpls_label);
int err;
switch (af) {
case AF_MPLS:
errno = 0;
err = mpls_pton1(src, (struct mpls_label *)addr, maxlabels);
break;
default:
errno = EAFNOSUPPORT;
err = -1;
}
return err;
}
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