is same as a forking ipv6 server, but using clone(2) for posix threads instead of fork (copying entire process image).
currently only availible for linux / unix and gcc
client6.s and server6_clone.s can be compiled and linked with GNU make utility by using existing Makefile.
change directory to source and Makefile containing directory server6-clone.
- cd server6-clone/
Now clean project to delete outdated binary executables or objects.
- make clean
rm -f client6 client6.o server6_clone server6_clone.o
build client6
- make client6
ggcc "-Wimplicit-function-declaration" -o client6.o -c client6.c
client6.c: In function ‘ping’: client6.c:42:27: warning: embedded ‘\0’ in format [-Wformat-contains-nul] 42 | sprintf(inbuf, "%s\r\n\0", msg); | ^~ client6.c:49:16: warning: function returns address of local variable [-Wreturn-local-addr] 49 | return &outbuf[0]; | ^~~~~~~~~~ client6.c: In function ‘main’: client6.c:92:17: warning: implicit declaration of function ‘close’; did you mean ‘pclose’? [-Wimplicit-function-declaration] 92 | close(sd); | ^~~~~ | pclose gcc "-Wimplicit-function-declaration" -o client6 client6.o
build server6
- make server6_clone
gcc "-Wimplicit-function-declaration" -o server6.o -c server6.c
gcc "-Wimplicit-function-declaration" -o server6 server6.o
- ./server6 "2600:1f18:7a3f:a700::6291" 7777
./server6 program started... server trys listening on address 2600:1f18:7a3f:a700::6291 port: 7777 ./server6: cannot clone(2), trying to fork(2)./server6: offset: 1024, pagesze_offet: 4095, pa_offset: 0, sockets: s_sd=3, c_sd=4 ./server6: cannot clone(2), trying to fork(2)./server6: client request handled after sending/receiving 136 bytes total. ./server6 closed client socket descriptor 4 now, exiting in 1 secondchild pid: 231095child pid 231095 exited, status=0, done=1 ^C zen@virginia:~/prog/chat-ipv6/c-server6$ sudo ./server6 "2600:1f18:7a3f:a700::6291" 7777 ./server6 program started... server trys listening on address 2600:1f18:7a3f:a700::6291 port: 7777 ./server6: offset: 1024, pagesze_offet: 4095, pa_offset: 0, sockets: s_sd=3, c_sd=4 ./server6: client request handled after sending/receiving 136 bytes total. child pid: 231102 child pid 231102 exited, status=0, done=1 ./server6: offset: 1024, pagesze_offet: 4095, pa_offset: 0, sockets: s_sd=3, c_sd=5 ./server6: client request handled after sending/receiving 135 bytes total. child pid: 231107 child pid 231107 exited, status=0, done=1
- winmake
winmake.bat > echo "building now EchoServer classes..." "building now EchoServer classes..." > javac EchoServer.java > echo "building now EchoClient class." "building now EchoClient class." > javac EchoClient.java > dir *.class Directory of C:\Users\heinr\source\chat-ipv6\java-server6 10/12/2024 03:40 3.188 EchoClient.class 10/12/2024 03:40 5.368 EchoServer.class 2 File(s) 8.556 bytes
- make all
zen@virginia:~/prog/chat-ipv6/java-server6$ make all rm -f *.class javac EchoServer.java javac EchoClient.java zen@virginia:~/prog/chat-ipv6/java-server6$ ls -al *.class -rw-r--r-- 1 zen mailers 3188 Dec 10 03:44 EchoClient.class -rw-r--r-- 1 zen mailers 5368 Dec 10 03:44 EchoServer.class zen@virginia:~/prog/chat-ipv6/java-server6$
- java EchoServer "172.31.20.156" "2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5" 7777
zen@paris:~/prog/chat-ipv6/java-server6$ java EchoServer "172.31.20.156" "2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5" 7777 server address set to 172.31.20.156 server address6 set to 2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5 Simple TCP Echo Server started ... Simple TCP Echo Server started ... EchoServer is listening on address 2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5 port 7777. EchoServer is listening on address 172.31.20.156 port 7777. Accepted connection to 2600:1f18:7a3f:a700:0:0:0:6291 (2600:1f18:7a3f:a700:0:0:0:6291) on port 58318. Receiving from socket: Finished, now sending back to socket: 2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5 => 2600:1f18:7a3f:a700:0:0:0:6291 uname -a : Linux ip-172-31-57-91 6.8.0-1019-aws #21-Ubuntu SMP Wed Nov 6 21:21:49 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux client socket close() Accepted connection to ec2-100-26-162-115.compute-1.amazonaws.com (100.26.162.115) on port 48304. Receiving from socket: Finished, now sending back to socket: 172.31.20.156 => ec2-100-26-162-115.compute-1.amazonaws.com/100.26.162.115 uname -a : Linux ip-172-31-57-91 6.8.0-1019-aws #21-Ubuntu SMP Wed Nov 6 21:21:49 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux client socket close()
- java EchoClient "2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5" 7777 "uname -a :
uname -a"
zen@virginia:~/prog/chat-ipv6/java-server6$ java EchoClient "2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5" 7777 "uname -a : `uname -a` " Receiving: 2a05:d012:209:ee00:a8ba:d6c4:bd60:bab5 => 2600:1f18:7a3f:a700:0:0:0:6291 uname -a : Linux ip-172-31-57-91 6.8.0-1019-aws #21-Ubuntu SMP Wed Nov 6 21:21:49 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux finished zen@virginia:~/prog/chat-ipv6/java-server6$ java EchoClient "13.38.136.165" 7777 "uname -a : `uname -a` " Receiving: 172.31.20.156 => ec2-100-26-162-115.compute-1.amazonaws.com/100.26.162.115 uname -a : Linux ip-172-31-57-91 6.8.0-1019-aws #21-Ubuntu SMP Wed Nov 6 21:21:49 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux finished ^C
