mohet01
asked on
recv() and send() is blocking
Hello
Our application is using port 1723 to run socket api on hpux send() and recv()
both end points are on the same machine.
After we start the application, situation is:
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62687 ESTABLISHED
tcp 0 0 localhost.62951 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.62859 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62818 ESTABLISHED
tcp 0 0 localhost.62722 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62990 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63101 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62859 ESTABLISHED
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.63101 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.62687 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62990 ESTABLISHED
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62722 ESTABLISHED
tcp 0 0 localhost.62818 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62951 ESTABLISHED
After giving input in runtime and then socket calls send() and recv() are stil increased
bytes_sent = send(sock_fd, tmp, message_l - total_bytes_sent, flags );
bytes_read = recv(sock_fd, tmp, buffer_l - total_bytes_read, flags);
We see huge number(1743669) of above 2 calls from a particular process on sock_fd=4.
After 30 minutes, we see the below, By this time, input processing should be completed:
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62986 CLOSE_WAIT
tcp 0 0 localhost.63080 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62985 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63040 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63075 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62942 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62865 CLOSE_WAIT
tcp 0 0 localhost.63029 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62893 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62923 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62843 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62964 CLOSE_WAIT
tcp 0 0 localhost.62953 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62948 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62851 CLOSE_WAIT
tcp 0 0 localhost.62979 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62932 CLOSE_WAIT
tcp 0 0 localhost.62909 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62964 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62988 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62955 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63085 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62969 CLOSE_WAIT
tcp 0 0 localhost.63006 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63040 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62931 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62860 CLOSE_WAIT
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62997 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62947 CLOSE_WAIT
tcp 0 0 localhost.62954 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.63046 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63045 CLOSE_WAIT
tcp 0 0 localhost.62835 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63023 CLOSE_WAIT
tcp 0 0 localhost.62879 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62879 CLOSE_WAIT
tcp 0 0 localhost.62999 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62987 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62929 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62953 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62928 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62885 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62921 CLOSE_WAIT
tcp 0 0 localhost.63085 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62847 CLOSE_WAIT
tcp 0 0 localhost.62988 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62847 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62850 CLOSE_WAIT
tcp 0 0 localhost.62866 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62872 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63006 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62954 CLOSE_WAIT
tcp 0 0 localhost.63075 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62835 CLOSE_WAIT
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63001 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62872 CLOSE_WAIT
tcp 0 0 localhost.62997 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62985 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62923 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62999 CLOSE_WAIT
tcp 0 0 localhost.62865 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62998 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62980 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63035 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.1723 localhost.62996 CLOSE_WAIT
tcp 0 0 localhost.62922 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63018 CLOSE_WAIT
tcp 0 0 localhost.62851 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62998 CLOSE_WAIT
tcp 0 0 localhost.62921 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62986 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62957 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62957 CLOSE_WAIT
tcp 0 0 localhost.62991 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63018 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62932 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63069 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62890 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63046 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62866 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62922 CLOSE_WAIT
tcp 0 0 localhost.62860 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62929 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62996 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.62850 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63080 CLOSE_WAIT
tcp 0 0 localhost.63045 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62890 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62930 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63001 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62980 CLOSE_WAIT
tcp 0 0 localhost.62947 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62987 CLOSE_WAIT
tcp 0 0 localhost.62959 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62906 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63024 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62958 CLOSE_WAIT
tcp 0 0 localhost.62934 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62868 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62970 CLOSE_WAIT
tcp 0 0 localhost.62948 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62930 CLOSE_WAIT
tcp 0 0 localhost.62969 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62941 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62906 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62979 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63058 CLOSE_WAIT
tcp 0 0 localhost.62905 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62959 CLOSE_WAIT
tcp 0 0 localhost.63064 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63058 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62991 CLOSE_WAIT
tcp 0 0 localhost.62868 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62905 CLOSE_WAIT
tcp 0 0 localhost.62885 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63017 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62893 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.62970 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62955 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62931 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62909 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62934 CLOSE_WAIT
tcp 0 0 localhost.63023 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63064 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63069 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63017 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63029 CLOSE_WAIT
tcp 0 0 localhost.62942 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63035 CLOSE_WAIT
tcp 0 0 localhost.62958 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62928 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62843 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62941 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63024 CLOSE_WAIT
Do you think we need to something before calling recv() or send()?
Sham
Our application is using port 1723 to run socket api on hpux send() and recv()
both end points are on the same machine.
After we start the application, situation is:
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62687 ESTABLISHED
tcp 0 0 localhost.62951 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.62859 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62818 ESTABLISHED
tcp 0 0 localhost.62722 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62990 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63101 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62859 ESTABLISHED
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.63101 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.62687 localhost.1723 ESTABLISHED
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62990 ESTABLISHED
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62722 ESTABLISHED
tcp 0 0 localhost.62818 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62951 ESTABLISHED
After giving input in runtime and then socket calls send() and recv() are stil increased
bytes_sent = send(sock_fd, tmp, message_l - total_bytes_sent, flags );
bytes_read = recv(sock_fd, tmp, buffer_l - total_bytes_read, flags);
We see huge number(1743669) of above 2 calls from a particular process on sock_fd=4.
After 30 minutes, we see the below, By this time, input processing should be completed:
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62986 CLOSE_WAIT
tcp 0 0 localhost.63080 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62985 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63040 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63075 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62942 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62865 CLOSE_WAIT
tcp 0 0 localhost.63029 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62893 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62923 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62843 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62964 CLOSE_WAIT
tcp 0 0 localhost.62953 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62948 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62851 CLOSE_WAIT
tcp 0 0 localhost.62979 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62932 CLOSE_WAIT
tcp 0 0 localhost.62909 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62964 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62988 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62955 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63085 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62969 CLOSE_WAIT
tcp 0 0 localhost.63006 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63040 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62931 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62860 CLOSE_WAIT
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62997 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62947 CLOSE_WAIT
tcp 0 0 localhost.62954 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.63046 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63045 CLOSE_WAIT
tcp 0 0 localhost.62835 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63023 CLOSE_WAIT
tcp 0 0 localhost.62879 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62879 CLOSE_WAIT
tcp 0 0 localhost.62999 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62987 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62929 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62953 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62928 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62885 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62921 CLOSE_WAIT
tcp 0 0 localhost.63085 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62847 CLOSE_WAIT
tcp 0 0 localhost.62988 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62847 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62850 CLOSE_WAIT
tcp 0 0 localhost.62866 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62872 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63006 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62954 CLOSE_WAIT
tcp 0 0 localhost.63075 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62835 CLOSE_WAIT
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63001 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62872 CLOSE_WAIT
tcp 0 0 localhost.62997 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62985 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62923 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62999 CLOSE_WAIT
tcp 0 0 localhost.62865 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62998 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62980 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63035 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.1723 localhost.62996 CLOSE_WAIT
tcp 0 0 localhost.62922 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63018 CLOSE_WAIT
tcp 0 0 localhost.62851 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62998 CLOSE_WAIT
tcp 0 0 localhost.62921 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62986 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62957 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62957 CLOSE_WAIT
tcp 0 0 localhost.62991 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63018 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62932 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63069 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62890 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63046 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62866 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62922 CLOSE_WAIT
tcp 0 0 localhost.62860 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62929 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62996 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.62850 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63080 CLOSE_WAIT
tcp 0 0 localhost.63045 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62890 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62930 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63001 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62980 CLOSE_WAIT
tcp 0 0 localhost.62947 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62987 CLOSE_WAIT
tcp 0 0 localhost.62959 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62906 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63024 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62958 CLOSE_WAIT
tcp 0 0 localhost.62934 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62868 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62970 CLOSE_WAIT
tcp 0 0 localhost.62948 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62930 CLOSE_WAIT
tcp 0 0 localhost.62969 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62941 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62906 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62979 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63058 CLOSE_WAIT
tcp 0 0 localhost.62905 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62959 CLOSE_WAIT
tcp 0 0 localhost.63064 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63058 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62991 CLOSE_WAIT
tcp 0 0 localhost.62868 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62905 CLOSE_WAIT
tcp 0 0 localhost.62885 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63017 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62893 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.62970 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62955 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62931 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62909 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62934 CLOSE_WAIT
tcp 0 0 localhost.63023 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63064 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63069 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63017 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63029 CLOSE_WAIT
tcp 0 0 localhost.62942 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63035 CLOSE_WAIT
tcp 0 0 localhost.62958 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62928 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62843 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62941 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63024 CLOSE_WAIT
Do you think we need to something before calling recv() or send()?
Sham
ASKER
Afer 1 hour below is the output:
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62986 CLOSE_WAIT
tcp 0 0 localhost.63080 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62985 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63040 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63075 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62942 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62865 CLOSE_WAIT
tcp 0 0 localhost.63029 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62893 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62923 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62843 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62964 CLOSE_WAIT
tcp 0 0 localhost.62953 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62948 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62851 CLOSE_WAIT
tcp 0 0 localhost.62979 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62932 CLOSE_WAIT
tcp 0 0 localhost.62909 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62964 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62988 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62955 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63085 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62969 CLOSE_WAIT
tcp 0 0 localhost.63006 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63040 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62931 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62860 CLOSE_WAIT
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62997 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62947 CLOSE_WAIT
tcp 0 0 localhost.62954 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.63046 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63045 CLOSE_WAIT
tcp 0 0 localhost.62835 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63023 CLOSE_WAIT
tcp 0 0 localhost.62879 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62879 CLOSE_WAIT
tcp 0 0 localhost.62999 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62987 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62929 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62953 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62928 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62885 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62921 CLOSE_WAIT
tcp 0 0 localhost.63085 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62847 CLOSE_WAIT
tcp 0 0 localhost.62988 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62847 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62850 CLOSE_WAIT
tcp 0 0 localhost.62866 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62872 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63006 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62954 CLOSE_WAIT
tcp 0 0 localhost.63075 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62835 CLOSE_WAIT
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63001 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62872 CLOSE_WAIT
tcp 0 0 localhost.62997 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62985 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62923 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62999 CLOSE_WAIT
tcp 0 0 localhost.62865 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62998 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62980 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63035 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.1723 localhost.62996 CLOSE_WAIT
tcp 0 0 localhost.62922 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63018 CLOSE_WAIT
tcp 0 0 localhost.62851 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62998 CLOSE_WAIT
tcp 0 0 localhost.62921 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62986 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62957 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62957 CLOSE_WAIT
tcp 0 0 localhost.62991 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63018 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62932 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63069 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62890 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63046 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62866 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62922 CLOSE_WAIT
tcp 0 0 localhost.62860 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62929 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62996 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.62850 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63080 CLOSE_WAIT
tcp 0 0 localhost.63045 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62890 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62930 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63001 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62980 CLOSE_WAIT
tcp 0 0 localhost.62947 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62987 CLOSE_WAIT
tcp 0 0 localhost.62959 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62906 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63024 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62958 CLOSE_WAIT
tcp 0 0 localhost.62934 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62868 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62970 CLOSE_WAIT
tcp 0 0 localhost.62948 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62930 CLOSE_WAIT
tcp 0 0 localhost.62969 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62941 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62906 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62979 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63058 CLOSE_WAIT
tcp 0 0 localhost.62905 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62959 CLOSE_WAIT
tcp 0 0 localhost.63064 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63058 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62991 CLOSE_WAIT
tcp 0 0 localhost.62868 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62905 CLOSE_WAIT
tcp 0 0 localhost.62885 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63017 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62893 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.62970 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62955 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62931 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62909 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62934 CLOSE_WAIT
tcp 0 0 localhost.63023 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63064 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63069 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63017 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63029 CLOSE_WAIT
tcp 0 0 localhost.62942 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63035 CLOSE_WAIT
tcp 0 0 localhost.62958 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62928 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62843 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62941 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63024 CLOSE_WAIT
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.62986 CLOSE_WAIT
tcp 0 0 localhost.63080 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62985 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63040 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63075 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62942 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62865 CLOSE_WAIT
tcp 0 0 localhost.63029 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62893 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62923 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62843 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62964 CLOSE_WAIT
tcp 0 0 localhost.62953 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62948 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62851 CLOSE_WAIT
tcp 0 0 localhost.62979 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62932 CLOSE_WAIT
tcp 0 0 localhost.62909 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62964 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62988 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62955 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63085 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62969 CLOSE_WAIT
tcp 0 0 localhost.63006 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63040 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62931 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62860 CLOSE_WAIT
tcp 0 0 localhost.61263 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62997 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62947 CLOSE_WAIT
tcp 0 0 localhost.62954 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61262 ESTABLISHED
tcp 0 0 localhost.63046 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63045 CLOSE_WAIT
tcp 0 0 localhost.62835 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63023 CLOSE_WAIT
tcp 0 0 localhost.62879 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61268 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62879 CLOSE_WAIT
tcp 0 0 localhost.62999 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62987 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62929 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62953 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62928 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62885 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62921 CLOSE_WAIT
tcp 0 0 localhost.63085 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62847 CLOSE_WAIT
tcp 0 0 localhost.62988 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62847 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62850 CLOSE_WAIT
tcp 0 0 localhost.62866 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62872 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63006 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62954 CLOSE_WAIT
tcp 0 0 localhost.63075 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62835 CLOSE_WAIT
tcp 0 0 localhost.61268 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.63001 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62872 CLOSE_WAIT
tcp 0 0 localhost.62997 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61262 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62985 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62923 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62999 CLOSE_WAIT
tcp 0 0 localhost.62865 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62998 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62980 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63035 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61248 ESTABLISHED
tcp 0 0 localhost.1723 *.* LISTEN
tcp 0 0 localhost.1723 localhost.62996 CLOSE_WAIT
tcp 0 0 localhost.62922 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63018 CLOSE_WAIT
tcp 0 0 localhost.62851 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62998 CLOSE_WAIT
tcp 0 0 localhost.62921 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62986 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62957 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62957 CLOSE_WAIT
tcp 0 0 localhost.62991 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63018 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62932 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63069 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61248 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62890 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63046 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62866 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62922 CLOSE_WAIT
tcp 0 0 localhost.62860 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62929 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62996 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.61251 ESTABLISHED
tcp 0 0 localhost.62850 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63080 CLOSE_WAIT
tcp 0 0 localhost.63045 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62890 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62930 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63001 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62980 CLOSE_WAIT
tcp 0 0 localhost.62947 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62987 CLOSE_WAIT
tcp 0 0 localhost.62959 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62906 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63024 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62958 CLOSE_WAIT
tcp 0 0 localhost.62934 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62868 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62970 CLOSE_WAIT
tcp 0 0 localhost.62948 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62930 CLOSE_WAIT
tcp 0 0 localhost.62969 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62941 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61251 localhost.1723 ESTABLISHED
tcp 0 0 localhost.1723 localhost.61263 ESTABLISHED
tcp 0 0 localhost.1723 localhost.62906 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62979 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63058 CLOSE_WAIT
tcp 0 0 localhost.62905 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62959 CLOSE_WAIT
tcp 0 0 localhost.63064 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63058 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62991 CLOSE_WAIT
tcp 0 0 localhost.62868 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62905 CLOSE_WAIT
tcp 0 0 localhost.62885 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.63017 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62893 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.61277 ESTABLISHED
tcp 0 0 localhost.62970 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.61277 localhost.1723 ESTABLISHED
tcp 0 0 localhost.62955 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62931 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62909 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.62934 CLOSE_WAIT
tcp 0 0 localhost.63023 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63064 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63069 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63017 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63029 CLOSE_WAIT
tcp 0 0 localhost.62942 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.63035 CLOSE_WAIT
tcp 0 0 localhost.62958 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62928 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.62843 localhost.1723 FIN_WAIT_2
tcp 0 0 localhost.1723 localhost.62941 CLOSE_WAIT
tcp 0 0 localhost.1723 localhost.63024 CLOSE_WAIT
The most likely application does not close open sockets.
What about the netstat output don't you like ?
Is it the amount of connections ?
Or the fact that they end up in a CLOSE_WAIT or FIN_WAIT_2 state ?
Is it the amount of connections ?
Or the fact that they end up in a CLOSE_WAIT or FIN_WAIT_2 state ?
the output are "dangling" sockets.
Use shutdown() before close() when closing the connection or the application.
man 2 shutdown
Use shutdown() before close() when closing the connection or the application.
man 2 shutdown
NAME
shutdown - shut down part of a full-duplex connection
SYNOPSIS
#include <sys/socket.h>
int shutdown(int sockfd, int how);
DESCRIPTION
The shutdown() call causes all or part of a full-duplex connection on the socket associated with sockfd to
be shut down. If how is SHUT_RD, further receptions will be disallowed. If how is SHUT_WR, further trans-
missions will be disallowed. If how is SHUT_RDWR, further receptions and transmissions will be disallowed.
ASKER
hello infinity
The port 1723 is ending up in closewait or finwait.
yes it is the number of send and recv per unit time
Sham
The port 1723 is ending up in closewait or finwait.
yes it is the number of send and recv per unit time
Sham
>> yes it is the number of send and recv per unit time
Are you implying that you make a new connection for every send/recv you do ?
Is that intentional/necessary ?
Are you properly closing the connection and cleaning up once the send/recv is done ?
Are you implying that you make a new connection for every send/recv you do ?
Is that intentional/necessary ?
Are you properly closing the connection and cleaning up once the send/recv is done ?
ASKER
here is the answer
port number is 1723 used, multiple apps are running the below flow on same port.
========================== ===
CciInit: Entered with [CAI.SDK57e2-1][CAI.SDK57e 2-1].
tc_sendMessageToProxy: proxy sock is -1.
tc_sendMessageToProxy: ERROR Not connected to proxy server.
tc_sendCmdblkToProxy: Establishing connection to server.
tc_openProxySocket: Entered
tc_connectToProxy -> getaddrinfo for localhost and TC_TCP_SERVNAME failed with [service not supported for socket type]
tc_connectToProxy -> getaddrinfo for ::1 and TC_TCP_SERVNAME failed with [service not supported for socket type]
tc_connectToProxy -> getaddrinfo failed for 127.0.0.1 and TC_TCP_SERVNAME with [service not supported for socket type]
verifyandconnect(): Entered verifyandconnect()
verifyandconnect(): Using AF_INET
verifyandconnect(): Succesful connection; returning TC_TCP_SUCCESS
tc_connectToProxy: leaving with socket=<14> rc=<0>.
tc_sendCmdblkToProxy: Established connection to proxy.
tc_sendMessageToProxy: proxy sock is 14.
tc_tcpSendMessageBlock: Entered socket=<14> message_p=<0x64103f78> message_l=<12> flags=<0>.
tc_tcpSendMessageBlock: Leaving total_bytes_sent=<12> rc=<0>.
tc_readMessageFromProxy: proxy sock is 14.
tc_tcpReadMessageBlock Entered socket<14> buffer_p<0x64103f88> buffer_l<60> flags<0x0>.
tc_tcpSocketSelect: Entered socket_fd=<14> timeout=<30> flag=<1>.
tc_tcpSocketSelect: select is for read.
tc_tcpSocketSelect: tv_sec=<30> tv_usec=<0>.
tc_tcpSocketSelect: before select.
tc_tcpSocketSelect: select returned numfds=<0> difftime=<1678541126>.
tc_tcpSocketSelect: select timed out.
tc_tcpSocketSelect: leaving with rc=<3>.
tc_tcpReadMessageBlock leaving with total_bytes_read=<0> rc=<1>.
tc_tcpReadMessageBlock: Closing client connection socket<14>.
tc_tcp_closeConnectionToPr oxy: Entered.
tc_tcp_closeConnectionToPr oxy: Leaving with rc=<0>.
CciInit: ERROR RPC Init call failed. process id=<22498>
tc_disconnectFromProxy: ERROR not connected to proxy server.
CciInit: Leaving with rc=<16>.
========================== ========
Sham
port number is 1723 used, multiple apps are running the below flow on same port.
==========================
CciInit: Entered with [CAI.SDK57e2-1][CAI.SDK57e
tc_sendMessageToProxy: proxy sock is -1.
tc_sendMessageToProxy: ERROR Not connected to proxy server.
tc_sendCmdblkToProxy: Establishing connection to server.
tc_openProxySocket: Entered
tc_connectToProxy -> getaddrinfo for localhost and TC_TCP_SERVNAME failed with [service not supported for socket type]
tc_connectToProxy -> getaddrinfo for ::1 and TC_TCP_SERVNAME failed with [service not supported for socket type]
tc_connectToProxy -> getaddrinfo failed for 127.0.0.1 and TC_TCP_SERVNAME with [service not supported for socket type]
verifyandconnect(): Entered verifyandconnect()
verifyandconnect(): Using AF_INET
verifyandconnect(): Succesful connection; returning TC_TCP_SUCCESS
tc_connectToProxy: leaving with socket=<14> rc=<0>.
tc_sendCmdblkToProxy: Established connection to proxy.
tc_sendMessageToProxy: proxy sock is 14.
tc_tcpSendMessageBlock: Entered socket=<14> message_p=<0x64103f78> message_l=<12> flags=<0>.
tc_tcpSendMessageBlock: Leaving total_bytes_sent=<12> rc=<0>.
tc_readMessageFromProxy: proxy sock is 14.
tc_tcpReadMessageBlock Entered socket<14> buffer_p<0x64103f88> buffer_l<60> flags<0x0>.
tc_tcpSocketSelect: Entered socket_fd=<14> timeout=<30> flag=<1>.
tc_tcpSocketSelect: select is for read.
tc_tcpSocketSelect: tv_sec=<30> tv_usec=<0>.
tc_tcpSocketSelect: before select.
tc_tcpSocketSelect: select returned numfds=<0> difftime=<1678541126>.
tc_tcpSocketSelect: select timed out.
tc_tcpSocketSelect: leaving with rc=<3>.
tc_tcpReadMessageBlock leaving with total_bytes_read=<0> rc=<1>.
tc_tcpReadMessageBlock: Closing client connection socket<14>.
tc_tcp_closeConnectionToPr
tc_tcp_closeConnectionToPr
CciInit: ERROR RPC Init call failed. process id=<22498>
tc_disconnectFromProxy: ERROR not connected to proxy server.
CciInit: Leaving with rc=<16>.
==========================
Sham
ASKER
netstat -p tcp 1723
tcp:
594006 packets sent
203442 data packets (28208633 bytes)
5 data packets (2324 bytes) retransmitted
189412 ack-only packets (36145 delayed)
0 URG only packets
0 window probe packets
12 window update packets
201152 control packets
591573 packets received
263024 acks (for 28346549 bytes)
2 duplicate acks
0 acks for unsent data
196095 packets (18798516 bytes) received in-sequence
0 completely duplicate packets (0 bytes)
0 packets with some dup data (0 bytes duped)
23 out of order packets (1158 bytes)
0 packets (0 bytes) of data after window
0 window probes
2949 window update packets
64 packets received after close
0 segments discarded for bad checksum
0 bad TCP segments dropped due to state change
16621 connection requests
17609 connection accepts
34230 connections established (including accepts)
45670 connections closed (including 13646 drops)
11 embryonic connections dropped
109954 segments updated rtt (of 109954 attempts)
5 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
134764 keepalive timeouts
134759 keepalive probes sent
0 connections dropped by keepalive
0 connect requests dropped due to full queue
138 connect requests dropped due to no listener
0 suspect connect requests dropped due to aging
0 suspect connect requests dropped due to rate
tcp:
594006 packets sent
203442 data packets (28208633 bytes)
5 data packets (2324 bytes) retransmitted
189412 ack-only packets (36145 delayed)
0 URG only packets
0 window probe packets
12 window update packets
201152 control packets
591573 packets received
263024 acks (for 28346549 bytes)
2 duplicate acks
0 acks for unsent data
196095 packets (18798516 bytes) received in-sequence
0 completely duplicate packets (0 bytes)
0 packets with some dup data (0 bytes duped)
23 out of order packets (1158 bytes)
0 packets (0 bytes) of data after window
0 window probes
2949 window update packets
64 packets received after close
0 segments discarded for bad checksum
0 bad TCP segments dropped due to state change
16621 connection requests
17609 connection accepts
34230 connections established (including accepts)
45670 connections closed (including 13646 drops)
11 embryonic connections dropped
109954 segments updated rtt (of 109954 attempts)
5 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
134764 keepalive timeouts
134759 keepalive probes sent
0 connections dropped by keepalive
0 connect requests dropped due to full queue
138 connect requests dropped due to no listener
0 suspect connect requests dropped due to aging
0 suspect connect requests dropped due to rate
ASKER
After we see this problem,
this is the status
# netstat -a | grep CLOSE_WAI | wc -l
2096
# netstat -a | grep 1723 | grep CLOSE_WAI | wc -l
2096
# netstat -a | grep 1723 | grep FIN_WAI | wc -l
2096
this is the status
# netstat -a | grep CLOSE_WAI | wc -l
2096
# netstat -a | grep 1723 | grep CLOSE_WAI | wc -l
2096
# netstat -a | grep 1723 | grep FIN_WAI | wc -l
2096
Do you close the socket by first calling to shutdown? Both in server and in client side?
ASKER
yes we call shutdown first
void tc_closeClientConnection(i nt sock_fd)
{
shutdown(sock_fd, 2);
close(sock_fd);
}
void tc_closeClientConnection(i
{
shutdown(sock_fd, 2);
close(sock_fd);
}
ASKER
my server update is for server side
ASKER
on client side we do
int tc_tcp_closeConnectionToPr oxy(void)
{
int rc = 0;
if(close(TC_TCP_ProxySocke t) == -1)
{
BPRINTF("tc_tcp_closeConne ctionToPro xy: close failed, errno=<%d>.\n", errno);
rc = -1;
}
TC_TCP_ProxySocket = -1;
//GlobalInitCount = 0;
return rc;
}
int tc_tcp_closeConnectionToPr
{
int rc = 0;
if(close(TC_TCP_ProxySocke
{
BPRINTF("tc_tcp_closeConne
rc = -1;
}
TC_TCP_ProxySocket = -1;
//GlobalInitCount = 0;
return rc;
}
So you don't call shutdown on the client side?
this is the cause of your problem.
this is the cause of your problem.
ASKER
On client side after send() or recv() the flow is like this:
1) if the send() or recv() is successful, we only run close() on sockfd
2) if the send() or recv() fails, then we run
close() on sockfd
and
then also run
shutdown() and close() on sockfd.
Do you think this is the problem? If yes, why?
Sham
Sham
1) if the send() or recv() is successful, we only run close() on sockfd
2) if the send() or recv() fails, then we run
close() on sockfd
and
then also run
shutdown() and close() on sockfd.
Do you think this is the problem? If yes, why?
Sham
Sham
ASKER
ok let me check this in my code
ASKER
canu show me the link, which says that,
shutdown() should be called before close()
?
shutdown() should be called before close()
?
The fd must be a valid file descriptor, and close() invalidates the fd.
http://linux.die.net/man/3/shutdown
http://linux.die.net/man/3/shutdown
ASKER
ASKER
it is not working
ASKER
so the client port 1723 is blocked in FIN-WAIT-2 state
server port 1723 is blocked in CLOSE_WAIT state.
Why do you think this happens?
server port 1723 is blocked in CLOSE_WAIT state.
Why do you think this happens?
Can you post some code about the reading/writing loop of the server and client?
Can you take a snapshot of the tcp packets flow, for example by using a packet sniffer?
Can you take a snapshot of the tcp packets flow, for example by using a packet sniffer?
See this table: http://www.tcpipguide.com/free/t_TCPConnectionTermination-2.htm
your application is stuck at the 3rd line. As you can see, "The server waits for the application process on its end to signal that it is ready to close".
your application is stuck at the 3rd line. As you can see, "The server waits for the application process on its end to signal that it is ready to close".
>> So you don't call shutdown on the client side?
>> this is the cause of your problem.
shutdown doesn't HAVE to be called. It's optional. A single close is sufficient to properly close the socket.
The problem in this case is on the server side : it doesn't properly close its end of the connection. You need to make sure that the server side calls close when appropriate.
>> this is the cause of your problem.
shutdown doesn't HAVE to be called. It's optional. A single close is sufficient to properly close the socket.
The problem in this case is on the server side : it doesn't properly close its end of the connection. You need to make sure that the server side calls close when appropriate.
ASKER
Hello Infinity
"The problem in this case is on the server side " I agree with this.
But i did not understand the point about closing the socket on server side.
"You need to make sure that the server side calls close when appropriate. "
As per socket programming, if client closes the socket, Does server needs to perform something? I think it is TCP which needs to handle.
Sham
"The problem in this case is on the server side " I agree with this.
But i did not understand the point about closing the socket on server side.
"You need to make sure that the server side calls close when appropriate. "
As per socket programming, if client closes the socket, Does server needs to perform something? I think it is TCP which needs to handle.
Sham
ASKER
Hello infinity
One important update is, May be, I was not handling close of socket on client side properly.
Now after the changes, I see port status on TIME_WAIT state.
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.60480 TIME_WAIT
tcp 0 0 localhost.1723 localhost.60481 TIME_WAIT
tcp 0 0 localhost.1723 localhost.60482 TIME_WAIT
tcp 0 0 localhost.60455 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60457 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60458 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60459 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60460 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60461 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60462 localhost.1723 TIME_WAIT
Sham
One important update is, May be, I was not handling close of socket on client side properly.
Now after the changes, I see port status on TIME_WAIT state.
# netstat -a | grep 1723
tcp 0 0 localhost.1723 localhost.60480 TIME_WAIT
tcp 0 0 localhost.1723 localhost.60481 TIME_WAIT
tcp 0 0 localhost.1723 localhost.60482 TIME_WAIT
tcp 0 0 localhost.60455 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60457 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60458 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60459 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60460 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60461 localhost.1723 TIME_WAIT
tcp 0 0 localhost.60462 localhost.1723 TIME_WAIT
Sham
And what is your changes?
TIME_WAIT is not a problem, they do not eat resources.
TIME_WAIT is not a problem, they do not eat resources.
ASKER
changes are,
when the send() and recv() is successfull, we were actually not closing socket.
Incase of send() and recv() in failure, we were only closing sockets.
so we ran follwoing in send/recv success case.
1) shutdown(,)
2) close()
Sham
when the send() and recv() is successfull, we were actually not closing socket.
Incase of send() and recv() in failure, we were only closing sockets.
so we ran follwoing in send/recv success case.
1) shutdown(,)
2) close()
Sham
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ASKER
thanx
ASKER
# netstat -a | grep 1723
is showing the above output after 30 minutes?