SIP-C Method Info

receive is composing input from contact

header

IN 333344445 SIP-C/4.0
I: -10
Q: 4 IN
F: sip:111122223@fetion.com.cn;p=16107
L: 49

body

<is-composing><state>input</state></is-composing>

header

IN 333344445 SIP-C/4.0
I: -9
Q: 10 IN
F: sip:111122223@fetion.com.cn;p=16107
RQ: nudge
L: 49

body

<is-composing><state>nudge</state></is-composing>

'nudge' means "闪屏" in Chinese.