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net/coap: move/rename function to add query option

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This commit is contained in:
Ken Bannister 2020-01-27 12:21:20 -05:00
parent 0d3180d534
commit 0ed4fe2da6
2 changed files with 37 additions and 2 deletions
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16
sys/include/net/nanocoap.h
View File

@ -142,12 +142,10 @@ extern "C" {
#define NANOCOAP_BLOCK_SIZE_EXP_MAX (6)
#endif
#if defined(MODULE_GCOAP) || defined(DOXYGEN)
/** @brief Maximum length of a query string written to a message */
#ifndef NANOCOAP_QS_MAX
#define NANOCOAP_QS_MAX (64)
#endif
#endif
/** @} */
/**
@ -964,6 +962,20 @@ static inline ssize_t coap_opt_add_format(coap_pkt_t *pkt, uint16_t format)
*/
ssize_t coap_opt_add_opaque(coap_pkt_t *pkt, uint16_t optnum, const uint8_t *val, size_t val_len);
/**
* @brief Adds a single Uri-Query option in the form 'key=value' into pkt
*
* @param[in,out] pkt The package that is being build
* @param[in] key Key to add to the query string
* @param[in] val Value to assign to @p key (may be NULL)
*
* @pre ((pkt != NULL) && (key != NULL))
*
* @return overall length of new query string
* @return -1 on error
*/
ssize_t coap_opt_add_uquery(coap_pkt_t *pkt, const char *key, const char *val);
/**
* @brief Encode the given string as option(s) into pkt
*

23
sys/net/application_layer/nanocoap/nanocoap.c
View File

@ -846,6 +846,29 @@ ssize_t coap_opt_add_string(coap_pkt_t *pkt, uint16_t optnum, const char *string
return write_len;
}
ssize_t coap_opt_add_uquery(coap_pkt_t *pdu, const char *key, const char *val)
{
char qs[NANOCOAP_QS_MAX];
size_t len = strlen(key);
size_t val_len = (val) ? (strlen(val) + 1) : 0;
/* test if the query string fits, account for the zero termination */
if ((len + val_len + 1) >= NANOCOAP_QS_MAX) {
return -1;
}
memcpy(&qs[0], key, len);
if (val) {
qs[len] = '=';
/* the `=` character was already counted in `val_len`, so subtract it here */
memcpy(&qs[len + 1], val, (val_len - 1));
len += val_len;
}
qs[len] = '\0';
return coap_opt_add_string(pdu, COAP_OPT_URI_QUERY, qs, '&');
}
ssize_t coap_opt_add_opaque(coap_pkt_t *pkt, uint16_t optnum, const uint8_t *val, size_t val_len)
{
return _add_opt_pkt(pkt, optnum, val, val_len);