Hi Rahul, On Fri, Apr 05, 2019 at 10:27:41AM +0000, rahul.mane . wrote: > Hello , > > I want to use LWIP stack (2.0.2) with pppos.I have NXP MC5748 board wi > SIM800c interface with one UART channel.I have use following AT > commands to configure GSM module: > > I am successfully getting following data from GSM module. > 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 Next step, I am trying to ping 8.8.8.8 > But I am getting Timeout error > lwip_socket(PF_INET, SOCK_RAW, 1) = 1lwip_sendto(1, data=0x40040728, > short_size=40, flags=0x0 to=8.8.8.8 port=42405ping: send 8.8.8.81. > lwip_recvfrom(1, 0x40008cb8, 64, 0x0, ..)2. lwip_recvfrom: top while > sock->lastdata=0x04. lwip_recvfrom: netconn_recv err=-3, > netbuf=0x05.lwip_recvfrom(1): buf == NULL, error is "Timeout."! > Is there any step i am missing to configure ? > For more information I have attached log file
I guess it is because checksums are disabled. Could you try enabling CHECKSUM_GEN_* and CHECKSUM_CHECK_* options ? Sylvain
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