54   LWIP_ASSERT("Can only deal with contiguous PBUFs", pbuf->tot_len == pbuf->len);  in coap_pdu_from_pbuf()
153 coap_add_token(coap_pdu_t *pdu, size_t len, const unsigned char *data) {  in coap_add_token()  argument
154   const size_t HEADERLENGTH = len + 4;  in coap_add_token()
156   if (!pdu || len > 8 || pdu->max_size < HEADERLENGTH)  in coap_add_token()
159   pdu->hdr->token_length = len;  in coap_add_token()
160   if (len)  in coap_add_token()
161     memcpy(pdu->hdr->token, data, len);  in coap_add_token()
171 coap_add_option(coap_pdu_t *pdu, unsigned short type, unsigned int len, const unsigned char *data) {  in coap_add_option()  argument
187 			    type - pdu->max_delta, data, len);  in coap_add_option()
203 coap_add_option_later(coap_pdu_t *pdu, unsigned short type, unsigned int len) {  in coap_add_option_later()  argument
219 			    type - pdu->max_delta, NULL, len);  in coap_add_option_later()
230   return ((unsigned char*)opt) + optsize - len;  in coap_add_option_later()
234 coap_add_data(coap_pdu_t *pdu, unsigned int len, const unsigned char *data) {  in coap_add_data()  argument
238   if (len == 0)  in coap_add_data()
241   if (pdu->length + len + 1 > pdu->max_size) {  in coap_add_data()
251   memcpy(pdu->data, data, len);  in coap_add_data()
252   pdu->length += len + 1;  in coap_add_data()
257 coap_get_data(coap_pdu_t *pdu, size_t *len, unsigned char **data) {  in coap_get_data()  argument
259   assert(len);  in coap_get_data()
263     *len = (unsigned char *)pdu->hdr + pdu->length - pdu->data;  in coap_get_data()
266     *len = 0;  in coap_get_data()