Here is a list of all documented variables with links to the struct/union documentation for each field:

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

W

_

- d -

• data : MQTTAsync_connectData::[struct].binarypwd, MQTTAsync_connectOptions::[struct].binarypwd, MQTTAsync_willOptions::[struct].payload, MQTTClient_connectOptions::[struct].binarypwd, MQTTClient_willOptions::[struct].payload, MQTTLenString, MQTTProperty::[struct].value.__unnamed0__
• datalen : socket_queue
• destinationName : MQTTAsync_successData5::[struct].alt.pub, MQTTAsync_successData::[struct].alt.pub
• disableDefaultTrustStore : MQTTAsync_SSLOptions, MQTTClient_SSLOptions
• do_openssl_init : MQTTAsync_init_options, MQTTClient_init_options
• dup : Header::[struct].bits, MQTTAsync_message, MQTTClient_message