Demo of TCP communication between Java client and C ++ Server

Java client code creates socket binding import Java. io. bufferedreader; import Java. io. ioexception; import Java. io. inputstreamreader; import Java. io. printwriter; import java.net. inetsocketaddress; import java.net. socket; public class javaclient {public static void main (string [] ARGs) throws interruptedexception, ioexception {inetsocketaddress ADDR = new inetsocketaddress ("Wagner. 0.0.1", 5678 ); // create socketsocket sock = new socke T (); sock. connect (ADDR); // connection server bufferedreader is = NULL; printwriter OS = NULL; OS = new printwriter (sock. getoutputstream (); // pipeline write tool is = new bufferedreader (New inputstreamreader (sock. getinputstream (); // The pipeline read tool bufferedreader user = new bufferedreader (New inputstreamreader (system. in); // The system tool that reads commands from the console. out. print ("client say:"); string MSG = user. readline (); While (! MSG. equals ("bye") {OS. println (MSG); OS. flush (); string echo = is. readline (); system. out. println (ECHO); system. out. print ("client say:"); MSG = user. readline ();} OS. close (); is. close (); sock. close ();}}

C ++ server, written in previous articles, copied now

Create socket

Bind Port

Listening port

// Leleserver. cpp: defines the entry point of the console application. // # Include <winsock2.h> # include <process. h ># Pragma comment (Lib, "ws2_32.lib") # include <list> STD: List <socket> client_list; void thread_client (void *); int main (INT argc, char * argv []) {wsadata; wsastartup (0x22, & wsadata); unsigned short sport = argc> 1? Atoi (argv [1]): 5678; int sockfd = socket (af_inet, sock_stream, ipproto_tcp); If (sockfd = invalid_socket) {printf ("fail to create socket. \ n "); return 1;} sockaddr_in saddr; saddr. sin_addr.s_addr = addr_any; saddr. sin_port = htons (sport); saddr. sin_family = af_inet; If (BIND (sockfd, (const sockaddr *) (& saddr), sizeof (saddr) {printf ("fail to bind, errno: % d. \ n ", getlasterror (); dword dw = wsagetlasterror (); Return 2;} If (Listen (sockfd, 5) {printf ("fail to listen. \ n "); return 3;} printf (" server is listening at [% d]. \ n "" wating for client to connect... \ n ", sport); For (;) {sockaddr_in caddr; int caddr_len = sizeof (caddr); int client = accept (sockfd, (sockaddr *) & caddr, & caddr_len); unsigned char * paddr = (unsigned char *) & caddr. sin_addr.s_addr; printf ("[% d. % d. % d. % d: % d] Coming. \ n ", paddr [0], paddr [1], Pa DDR [2], paddr [3], ntohs (caddr. sin_port); _ beginthread (thread_client, 0, (void *) client); client_list.push_back (client);} return 0;} void thread_client (void * ARGs) {Socket Client = (INT) ARGs; sockaddr_in caddr; int caddr_len = sizeof (caddr); getpeername (client, (sockaddr *) & caddr, & caddr_len ); unsigned char * paddr = (unsigned char *) & caddr. sin_addr.s_addr; unsigned short usport = ntohs (caddr. sin_port); (;) {Char szmsg [0x1000] = ""; if (0> = Recv (client, szmsg, sizeof (szmsg)-1, 0) break; char szecho [0x1000] = ""; sprintf (szecho, "server say: [% d. % d. % d. % d: % d] % s ", paddr [0], paddr [1], paddr [2], paddr [3], usport, szmsg); For (STD :: list <socket >:: iterator it = client_list.begin (); it! = Client_list.end (); It ++) {send (* It, szecho, strlen (szecho), 0 );}}}

The communication result is displayed in eclipse.