40000 max bytes length for custom lossless NGC packets.
37000 max bytes length for file and header, to leave some space for offline message syncing.
| what | Length in bytes | Contents |
|---|---|---|
| magic | 6 | 0x667788113435 |
| version | 1 | 0x01 |
| pkt id | 1 | 0x11 |
| msg id | 32 | *uint8_t to uniquely identify the message, obtain with tox_messagev3_get_new_message_id() |
| create ts | 4 | uint32_t unixtimestamp in UTC of local wall clock (in bigendian) |
| filename | 255 | *uint8_t len TOX_MAX_FILENAME_LENGTH, data first, then pad with NULL bytes |
| data | [1, 36701] | *uint8_t bytes of file data, zero length files not allowed! |
header size: 299 bytes
data size: 1 - 36701 bytes
to send files (mostly images) to an NGC group send a *uint8_t buffer (see spec above) to the group with:
tox_group_send_custom_packet() and specifiy lossless paramter as true