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TSCH: change the return type of the APIs (tsch-security.h)

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The return type is changed to "int" to "unsigned int" because APIs
provided by tsch-security are supposed to return an integer larger than
or equal to zero. This change clarifies that.
This commit is contained in:
Yasuyuki Tanaka 2016-12-15 17:07:58 +01:00
parent da853386a6
commit 4faf139523
2 changed files with 11 additions and 9 deletions
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14
core/net/mac/tsch/tsch-security.h
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@ -122,22 +122,24 @@ typedef uint8_t aes_key[16];
* \brief Return MIC length
* \return The length of MIC (>= 0)
*/
int tsch_security_mic_len(const frame802154_t *frame);
unsigned int tsch_security_mic_len(const frame802154_t *frame);
/**
* \brief Protect a frame with encryption and/or MIC
* \return The length of a generated MIC (>= 0)
*/
int tsch_security_secure_frame(uint8_t *hdr, uint8_t *outbuf,
int hdrlen, int datalen, struct asn_t *asn);
unsigned int tsch_security_secure_frame(uint8_t *hdr, uint8_t *outbuf,
int hdrlen, int datalen,
struct asn_t *asn);
/**
* \brief Parse and check a frame protected with encryption and/or MIC
* \retval 0 On error or security check failure (insecure frame)
* \retval 1 On success or no need for security check (good frame)
*/
int tsch_security_parse_frame(const uint8_t *hdr, int hdrlen, int datalen,
const frame802154_t *frame,
const linkaddr_t *sender, struct asn_t *asn);
unsigned int tsch_security_parse_frame(const uint8_t *hdr, int hdrlen,
int datalen, const frame802154_t *frame,
const linkaddr_t *sender,
struct asn_t *asn);
#endif /* __TSCH_SECURITY_H__ */