Bash script 

I have a string:

tcp 6 0 CLOSE src=111.11.111.111 dst=222.22.222.22 sport=45478 dport=5000 packets=7 bytes=474 src=111.11.111.111 dst=222.22.222.22 s
port=5000 dport=45478 packets=8 bytes=550 [ASSURED] mark=0 use=1

I need cut src IP addr 111.11.111.111, 
how?