31     coap_opt_t *opt = pdu->hdr->token + pdu->hdr->token_length;  in options_start()  local
32     return (*opt == COAP_PAYLOAD_START) ? NULL : opt;  in options_start()
39 coap_opt_parse(const coap_opt_t *opt, size_t length, coap_option_t *result) {  in coap_opt_parse()  argument
41   const coap_opt_t *opt_start = opt; /* store where parsing starts  */  in coap_opt_parse()
43   assert(opt); assert(result);  in coap_opt_parse()
56   result->delta = (*opt & 0xf0) >> 4;  in coap_opt_parse()
57   result->length = *opt & 0x0f;  in coap_opt_parse()
61     if (*opt != COAP_PAYLOAD_START) {  in coap_opt_parse()
69     ADVANCE_OPT(opt,length,1);  in coap_opt_parse()
70     result->delta = ((*opt & 0xff) << 8) + 269;  in coap_opt_parse()
77     ADVANCE_OPT(opt,length,1);  in coap_opt_parse()
78     result->delta += *opt & 0xff;  in coap_opt_parse()
93     ADVANCE_OPT(opt,length,1);  in coap_opt_parse()
94     result->length = ((*opt & 0xff) << 8) + 269;  in coap_opt_parse()
97     ADVANCE_OPT(opt,length,1);  in coap_opt_parse()
98     result->length += *opt & 0xff;  in coap_opt_parse()
105   ADVANCE_OPT(opt,length,1);  in coap_opt_parse()
108   result->value = (unsigned char *)opt;  in coap_opt_parse()
116   return (opt + result->length) - opt_start;  in coap_opt_parse()
222 coap_opt_delta(const coap_opt_t *opt) {  in coap_opt_delta()  argument
225   n = (*opt++ & 0xf0) >> 4;  in coap_opt_delta()
238     n = ((*opt++ & 0xff) << 8) + 269;  in coap_opt_delta()
241     n += *opt & 0xff;  in coap_opt_delta()
251 coap_opt_length(const coap_opt_t *opt) {  in coap_opt_length()  argument
254   length = *opt & 0x0f;  in coap_opt_length()
255   switch (*opt & 0xf0) {  in coap_opt_length()
260     ++opt;  in coap_opt_length()
263     ++opt;  in coap_opt_length()
266     ++opt;  in coap_opt_length()
274     length = (*opt++ << 8) + 269;  in coap_opt_length()
277     length += *opt++;  in coap_opt_length()
286 coap_opt_value(coap_opt_t *opt) {  in coap_opt_value()  argument
289   switch (*opt & 0xf0) {  in coap_opt_value()
303   switch (*opt & 0x0f) {  in coap_opt_value()
317   return (unsigned char *)opt + ofs;  in coap_opt_value()
321 coap_opt_size(const coap_opt_t *opt) {  in coap_opt_size()  argument
325   return coap_opt_parse(opt, (size_t)-1, &option);  in coap_opt_size()
329 coap_opt_setheader(coap_opt_t *opt, size_t maxlen,   in coap_opt_setheader()  argument
333   assert(opt);  in coap_opt_setheader()
339     opt[0] = delta << 4;  in coap_opt_setheader()
346     opt[0] = 0xd0;  in coap_opt_setheader()
347     opt[++skip] = delta - 13;  in coap_opt_setheader()
354     opt[0] = 0xe0;  in coap_opt_setheader()
355     opt[++skip] = ((delta - 269) >> 8) & 0xff;  in coap_opt_setheader()
356     opt[++skip] = (delta - 269) & 0xff;      in coap_opt_setheader()
360     opt[0] |= length & 0x0f;  in coap_opt_setheader()
367     opt[0] |= 0x0d;  in coap_opt_setheader()
368     opt[++skip] = length - 13;  in coap_opt_setheader()
375     opt[0] |= 0x0e;  in coap_opt_setheader()
376     opt[++skip] = ((length - 269) >> 8) & 0xff;  in coap_opt_setheader()
377     opt[++skip] = (length - 269) & 0xff;      in coap_opt_setheader()
384 coap_opt_encode(coap_opt_t *opt, size_t maxlen, unsigned short delta,  in coap_opt_encode()  argument
388   l = coap_opt_setheader(opt, maxlen, delta, length);  in coap_opt_encode()
397   opt += l;  in coap_opt_encode()
405     memcpy(opt, val, length);  in coap_opt_encode()