| 146 | |
| 147 | |
| 148 | class _CoAPOptsField(StrField): |
| 149 | islist = 1 |
| 150 | |
| 151 | def i2h(self, pkt, x): |
| 152 | return [(coap_options[0][o[0]], o[1]) if o[0] in coap_options[0] else o for o in x] # noqa: E501 |
| 153 | |
| 154 | # consume only the coap layer from the wire string |
| 155 | def getfield(self, pkt, s): |
| 156 | opts = self.m2i(pkt, s) |
| 157 | used = 0 |
| 158 | for o in opts: |
| 159 | used += o[0] |
| 160 | return s[used:], [(o[1], o[2]) for o in opts] |
| 161 | |
| 162 | def m2i(self, pkt, x): |
| 163 | opts = [] |
| 164 | o = _CoAPOpt(x) |
| 165 | cur_delta = 0 |
| 166 | while isinstance(o, _CoAPOpt): |
| 167 | cur_delta += _get_abs_val(o.delta, o.delta_ext) |
| 168 | # size of this option in bytes |
| 169 | u = 1 + len(o.opt_val) + len(o.delta_ext) + len(o.len_ext) |
| 170 | opts.append((u, cur_delta, o.opt_val)) |
| 171 | o = o.payload |
| 172 | return opts |
| 173 | |
| 174 | def i2m(self, pkt, x): |
| 175 | if not x: |
| 176 | return b"" |
| 177 | opt_lst = [] |
| 178 | for o in x: |
| 179 | if isinstance(o[0], str): |
| 180 | opt_lst.append((coap_options[1][o[0]], o[1])) |
| 181 | else: |
| 182 | opt_lst.append(o) |
| 183 | opt_lst.sort(key=lambda o: o[0]) |
| 184 | |
| 185 | opts = _CoAPOpt(delta=opt_lst[0][0], opt_val=opt_lst[0][1]) |
| 186 | high_opt = opt_lst[0][0] |
| 187 | for o in opt_lst[1:]: |
| 188 | opts = opts / _CoAPOpt(delta=o[0] - high_opt, opt_val=o[1]) |
| 189 | high_opt = o[0] |
| 190 | |
| 191 | return raw(opts) |
| 192 | |
| 193 | |
| 194 | class _CoAPPaymark(StrField): |