Hi All, I am using LWIP_2.0.3 with mbedtls. The application is basic, just connects to the server and returns the my IP. It runs fine as long as I connect to my own server (provided with mbedtls).
However, when I try to connect to an external server (e.g: api.ipify.org , www.myip.com), sometimes it connects, and more often it does not. The TCP connection establishment is stuck in SYN. (*Bellow I provide Wireshark traces*) I am using the Sockets API. All hints that allow me to track the issue are welcome. "No.","Time","Source","Destination","Protocol","Length","Info" "768","9.353602625","172.28.49.1","172.28.49.20","ICMP","140","Echo (ping) request id=0x2897, seq=0/0, ttl=64 (no response found!)" "843","10.358160899","172.28.49.1","172.28.49.20","DHCP","420","DHCP Offer - Transaction ID 0x69c5240a" "844","10.359725146","172.28.49.1","172.28.49.20","DHCP","420","DHCP Offer - Transaction ID 0x69c5240a" "845","10.359913832","172.28.49.1","172.28.49.20","DHCP","420","DHCP Offer - Transaction ID 0x69c5240a" "848","10.370618481","172.28.49.1","172.28.49.20","DHCP","420","DHCP ACK - Transaction ID 0x69c5240a" "849","10.370645466","172.28.49.1","172.28.49.20","DHCP","420","DHCP ACK - Transaction ID 0x69c5240a" "850","10.371771843","172.28.49.1","172.28.49.20","DHCP","420","DHCP ACK - Transaction ID 0x69c5240a" "975","11.360078293","172.28.49.20","172.28.49.1","DNS","150","Standard query 0xbc6b A www.myip.com" "979","11.383859541","172.28.49.1","172.28.49.20","DNS","182","Standard query response 0xbc6b A www.myip.com A 104.31.66.68 A 104.31.67.68" "981","11.384709792","172.28.49.20","104.31.66.68","TCP","136","60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "1240","14.349354969","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "1509","17.351303644","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "1793","20.350957686","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "2027","23.352701773","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "2230","26.352702850","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" "2495","29.354814115","172.28.49.20","104.31.66.68","TCP","136","[TCP Retransmission] 60956 > 443 [SYN] Seq=0 Win=2144 Len=0 MSS=536" -- Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
