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bluez5: clean up LTV writing

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Add ltv_writer that checks bounds, and use it. Simplify code a bit.
This commit is contained in:
Pauli Virtanen 2025-10-11 23:08:17 +03:00 • committed by Wim Taymans
parent f9f08f7f5c
commit bf801f4f7f
5 changed files with 118 additions and 96 deletions
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22
spa/plugins/bluez5/media-codecs.h
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@ -93,7 +93,7 @@ struct media_codec {
* called again to parse the remaining data. */
int (*get_bis_config)(const struct media_codec *codec, uint8_t *caps,
uint8_t *caps_size, struct spa_dict *settings,
uint8_t *caps_size, struct spa_dict *settings,
struct bap_codec_qos *qos);
/** If fill_caps is NULL, no endpoint is registered (for sharing with another codec). */
@ -264,4 +264,24 @@ bool media_codec_check_caps(const struct media_codec *codec, unsigned int codec_
const void *caps, size_t caps_size, const struct media_codec_audio_info *info,
const struct spa_dict *global_settings);
struct __attribute__((packed)) ltv {
uint8_t len;
uint8_t type;
uint8_t value[];
};
struct ltv_writer {
void *buf;
uint16_t size;
size_t max_size;
};
#define LTV_WRITER(ptr, max) ((struct ltv_writer) { .buf = (ptr), .max_size = (max) })
void ltv_writer_data(struct ltv_writer *w, uint8_t type, void* value, size_t len);
void ltv_writer_uint8(struct ltv_writer *w, uint8_t type, uint8_t v);
void ltv_writer_uint16(struct ltv_writer *w, uint8_t type, uint16_t value);
void ltv_writer_uint32(struct ltv_writer *w, uint8_t type, uint32_t value);
int ltv_writer_end(struct ltv_writer *w);
#endif