Multi-thread analog Asynchronous Network Communication and Linux Network Communication in linux

Multi-thread analog Asynchronous Network Communication and Linux Network Communication in linux

Server

/* Socket server * 2014-12-15 CopyRight (c) arbboter */# include <unistd. h> # include <stdio. h> # include <stdlib. h> # include <time. h> # include <sys/socket. h> # include <sys/types. h> # include <netdb. h> # include <string. h> # include <arpa/inet. h> # include <pthread. h ># include <vector> using namespace std; vector <int> vecClient; // thread synchronization lock pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; void * recv_thr (void * p ); void * send_thr (void * p); int main () {int sockfd_server; int sockfd_client; struct sockaddr_in addr_server; struct sockaddr_in addr_client; fig = 0; int client_max = 10; int server_port = 33891; srand (time (NULL); // create socket sockfd_server = socket (AF_INET, SOCK_STREAM, 0); if (sockfd_server =-1) {printf ("init socket failed \ n"); return-1 ;}// set address memset (& addr_server, 0, sizeof (addr_server); addr_server.sin_family = AF_INET; outputs = htonl (INADDR_ANY); outputs = htons (server_port); // socket bind with address if (bind (sockfd_server, (struct sockaddr *) & addr_server, sizeof (struct sockaddr )) =-1) {printf ("bind socket failed \ n"); return-1;} // server socket start list, waitting client to connect // This client_max indicates the number of simultaneous connections if (listen (sockfd_server, client_max) =-1) {printf ("start listen socket failed \ n "); return-1;} // data thread pthread_t tid = 0; pthread_create (& tid, NULL, send_thr, NULL); while (1) {addr_len = sizeof (struct sockaddr_in ); printf ("waitting for connected... \ n "); // waitting for connected sockfd_client = accept (sockfd_server, (struct sockaddr *) & addr_client, & addr_len); if (sockfd_client =-1) {printf ("accept socket failed \ n"); return-1;} // create a thread to talk with client printf ("recived connection from: % s \ n ", inet_ntoa (metadata); pthread_create (& tid, NULL, recv_thr, (void *) & sockfd_client); // Add it to pthread_mutex_lock (& mutex); vecClient. push_back (sockfd_client); pthread_mutex_unlock (& mutex);} close (sockfd_server); pthread_mutex_destroy (& mutex); return 0;} // void * recv_thr (void * p) {int fd = * (int *) p); int nRead = 0; char szBuf [512] = {0}; while (1) {memset (szBuf, 0, sizeof (szBuf); nRead = read (fd, szBuf, sizeof (szBuf); printf ("client: % s \ n", szBuf); if (strcmp (szBuf, "quit") = 0) {break;} sprintf (szBuf, "Your magic number is: % d", rand () % 100); printf ("server: % s \ n ", szBuf); write (fd, szBuf, strlen (szBuf);} return NULL;} // send data void * send_thr (void * p) {size_t I = 0; char szBuf [512] = {0}; while (1) {sleep (rand () % 10); pthread_mutex_lock (& mutex ); for (int I = 0; I <vecClient. size (); I ++) {sprintf (szBuf, "Your magic number is: % d", rand () % 100); printf ("[% 02d] server: % s \ n ", I, szBuf); write (vecClient [I], szBuf, strlen (szBuf);} pthread_mutex_unlock (& mutex);} return NULL ;}

Client

/* Socket client * 2014-12-15 CopyRight (c) arbboter */# include <unistd. h> # include <stdio. h> # include <stdlib. h> # include <sys/socket. h> # include <sys/types. h> # include <netdb. h> # include <string. h> # include <arpa/inet. h> # include <pthread. h> # include <signal. h> # include <errno. h> # include <string. h> void * recv_thr (void * p); int main () {int sockfd_server; struct sockaddr_in addr_server; socklen_t addr_len = 0; int server_port = 33891; char * server_addr = "192.168.2.200"; // create socket sockfd_server = socket (AF_INET, SOCK_STREAM, 0); if (sockfd_server =-1) {printf ("init socket failed \ n"); return-1 ;}// set server address memset (& addr_server, 0, sizeof (addr_server); addr_server.sin_family = AF_INET; dependencies = inet_addr (server_addr); addr_server.sin_port = htons (server_port); // connect server if (connect (sockfd_server, (struct sockaddr *) & addr_server, sizeof (struct sockaddr )) =-1) {printf ("connect server failed \ n"); return-1;} // start the data receiving thread pthread_t tid = 0; pthread_create (& tid, NULL, recv_thr, (void *) & sockfd_server); // send data char szBuf [512] = {0}; int nLen = 0; while (1) {// The receiving thread has exited if (ESRCH = pthread_kill (tid, 0) {break;} // wait for the input data to gets (szBuf); nLen = strlen (szBuf ); if (nLen> 0) {szBuf [nLen] = '\ 0'; write (sockfd_server, szBuf, nLen) ;}} close (sockfd_server); return 0 ;} // receive data void * recv_thr (void * p) {int fd = * (int *) p); int nRead = 0; char szBuf [512] = {0 }; while (1) {memset (szBuf, 0, sizeof (szBuf); nRead = read (fd, szBuf, sizeof (szBuf); printf ("server: % s \ n ", szBuf); if (strcmp (szBuf," quit ") = 0) {break ;}} return NULL ;}