pfkeyv2_get
rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL);
if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen,
if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0)
if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0)
int pfkeyv2_get(struct tdb *, void **, void **, int *, int *);