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