TAG_LEN
p += TAG_LEN(p) + 2;
if (TAG_LEN(p) >= sizeof(in_addr))
int l = TAG_LEN (p);
p += TAG_LEN(p) + 2;
if (TAG_LEN(extpath) >= sizeof(fname)){
memcpy(fname, extpath+2, TAG_LEN(extpath));
fname[(int)TAG_LEN(extpath)] = '\0';