lwip_socket(PF_INET, SOCK_STREAM, 0) = 0
lwip_bind(0, addr=0.0.0.0 port=19)
lwip_bind(0) succeeded
lwip_listen(0, backlog=5)
lwip_select(1, 0x400065a8, 0x400065ac, 0x0, tvsec=-1 tvusec=-1)
status_cb: Connected
   our_ipaddr  = 100.95.137.40
   his_ipaddr  = 192.168.254.254
   netmask     = 255.255.255.255
   dns1        = 59.144.144.46
   dns2        = 59.144.127.117
ping Add 1073762968 
lwip_socket(PF_INET, SOCK_RAW, 1) = 1
lwip_sendto(1, data=0x40040728, short_size=40, flags=0x0 to=8.8.8.8 port=42405
ping: send 8.8.8.8
1. lwip_recvfrom(1, 0x40008cb8, 64, 0x0, ..)
2. lwip_recvfrom: top while sock->lastdata=0x0
4. lwip_recvfrom: netconn_recv err=-3, netbuf=0x0
5.lwip_recvfrom(1): buf == NULL, error is "Timeout."!
4. ping lenth -1
send
lwip_sendto(1, data=0x40040728, short_size=40, flags=0x0 to=8.8.8.8 port=42405
ping: send 8.8.8.8
1. lwip_recvfrom(1, 0x40008cb8, 64, 0x0, ..)
2. lwip_recvfrom: top while sock->lastdata=0x0
4. lwip_recvfrom: netconn_recv err=-3, netbuf=0x0
5.lwip_recvfrom(1): buf == NULL, error is "Timeout."!
4. ping lenth -1
send
lwip_sendto(1, data=0x40040728, short_size=40, flags=0x0 to=8.8.8.8 port=42405
ping: send 8.8.8.8
1. lwip_recvfrom(1, 0x40008cb8, 64, 0x0, ..)
2. lwip_recvfrom: top while sock->lastdata=0x0
4. lwip_recvfrom: netconn_recv err=-3, netbuf=0x0
5.lwip_recvfrom(1): buf == NULL, error is "Timeout."!
4. ping lenth -1
send
lwip_sendto(1, data=0x40040728, short_size=40, flags=0x0 to=8.8.8.8 port=42405
ping: send 8.8.8.8
1. lwip_recvfrom(1, 0x40008cb8, 64, 0x0, ..)
2. lwip_recvfrom: top while sock->lastdata=0x0
4. lwip_recvfrom: netconn_recv err=-3, netbuf=0x0
5.lwip_recvfrom(1): buf == NULL, error is "Timeout."!
4. ping lenth -1