pingpong adapted for unix socket
This commit is contained in:
lapupe
parent
2e41ec11c8
commit
f4ba61f02d
@ -1,7 +1,39 @@
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#include "../lib/communication.h"
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#include <pthread.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#define PONGD_SERVICE_NAME "pongd"
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#define LISTEN_BACKLOG 50
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#define handle_error(msg) \
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do { perror(msg); exit(EXIT_FAILURE); } while (0)
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/*init a unit socket : bind, listen
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*and return a socket
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*/
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int set_listen_socket(const char *path) {
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int sfd;
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struct sockaddr_un my_addr;
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sfd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (sfd == -1)
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return -1;
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memset(&my_addr, 0, sizeof(struct sockaddr_un));
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/* Clear structure */
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my_addr.sun_family = AF_UNIX;
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strncpy(my_addr.sun_path, path, sizeof(my_addr.sun_path) - 1);
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unlink(my_addr.sun_path);
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if (bind(sfd, (struct sockaddr *) &my_addr, sizeof(struct sockaddr_un)) == -1)
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return -1;
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if (listen(sfd, LISTEN_BACKLOG) == -1)
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return -1;
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return sfd;
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}
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/* control the file descriptor*/
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@ -9,37 +41,64 @@ void * pongd_thread(void * pdata) {
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struct process *proc = (struct process*) pdata;
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// about the message
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size_t msize = 0;
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char *buf = NULL;
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int ret = 0;
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char *buf = malloc(BUFSIZ);
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if (buf == NULL)
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{
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handle_error("malloc");
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}
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memset(buf, 0, BUFSIZ);
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int nbytes;
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//init unix socket
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int sfd, cfd;
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struct sockaddr_un peer_addr;
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socklen_t peer_addr_size;
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printf("%s\n", proc->path_proc);
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sfd = set_listen_socket(proc->path_proc);
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if (sfd == -1){
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handle_error("set_listen_socket");
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}
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peer_addr_size = sizeof(struct sockaddr_un);
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printf("ici\n");
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cfd = accept(sfd, (struct sockaddr *) &peer_addr, &peer_addr_size);
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if (cfd == -1)
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handle_error("accept");
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proc->proc_fd = cfd;
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while (1) {
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// printf ("before read\n");
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while (ret <= 0 || msize == 0) {
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if ((ret = srv_read (proc, &buf, &msize)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_read %d\n", ret);
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}
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if ((nbytes = srv_read (proc, &buf)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_read %d\n", nbytes);
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}
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// printf ("after read\n");
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printf ("read, size %ld : %s\n", msize, buf);
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if (strncmp ("exit", buf, 4) != 0) {
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//printf ("before proc write\n");
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if ((ret = srv_write (proc, buf, msize)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_write %d\n", ret);
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}
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}else {
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printf ("read, size %d : %s\n", nbytes, buf);
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if (nbytes == 0){
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printf("------thread shutdown------------\n");
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close(cfd);
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close(sfd);
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free(buf);
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break;
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}
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if (strncmp ("exit", buf, 4) != 0) {
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//printf ("before proc write\n");
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if ((nbytes = srv_write (proc, buf, nbytes)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_write %d\n", nbytes);
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}
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}
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else {
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printf("------thread shutdown------------\n");
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close(cfd);
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close(sfd);
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free(buf);
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break;
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}
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ret = 0;
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msize = 0;
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}
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return NULL;
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}
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/*
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* main loop
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*
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@ -48,46 +107,142 @@ void * pongd_thread(void * pdata) {
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* then closes the pipes
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*/
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void main_loop (const struct service *srv)
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void main_loop (struct service *srv)
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{
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int ret;
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struct process tab_proc[10];
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//thread
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pthread_t tab_thread[10];
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int i;
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int cnt = 0;
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while (cnt < 10) {
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//init socket unix for server
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int sfd;
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struct sockaddr_un peer_addr;
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socklen_t peer_addr_size;
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// -1 : error, 0 = no new process, 1 = new process
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ret = srv_get_new_process (srv, &tab_proc[cnt]);
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if (ret == -1) {
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fprintf (stderr, "MAIN_LOOP: error service_get_new_process\n");
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continue;
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}
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srv_process_print (&tab_proc[cnt]);
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printf ("\n-------New thread created---------\n");
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int ret = pthread_create( &tab_thread[cnt], NULL, &pongd_thread, (void *) &tab_proc[cnt]);
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if (ret) {
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perror("pthread_create()");
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exit(errno);
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} else {
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printf("Creation of listen thread \n");
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}
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// printf ("after proc write\n");
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printf ("%d applications to serve\n",cnt);
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cnt++;
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sfd = set_listen_socket(srv->spath);
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if (sfd == -1){
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handle_error("set_listen_socket");
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}
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/* master file descriptor list */
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fd_set master;
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/* temp file descriptor list for select() */
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fd_set read_fds;
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/* maximum file descriptor number */
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int fdmax;
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/* listening socket descriptor */
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int listener = sfd;
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/* newly accept()ed socket descriptor */
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int newfd;
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/* buffer for client data */
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char *buf = malloc(BUFSIZ);
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if (buf == NULL)
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{
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handle_error("malloc");
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}
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memset(buf, 0, BUFSIZ);
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int nbytes;
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int i;
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/* clear the master and temp sets */
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FD_ZERO(&master);
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FD_ZERO(&read_fds);
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/* add the listener to the master set */
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FD_SET(listener, &master);
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//FD_SET(sfd, &master);
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/* keep track of the biggest file descriptor */
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fdmax = sfd; /* so far, it's this one*/
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for(;;) {
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/* copy it */
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read_fds = master;
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if(select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1)
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{
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perror("Server-select() error lol!");
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exit(1);
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}
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printf("Server-select...OK\n");
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/*run through the existing connections looking for data to be read*/
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for(i = 0; i <= fdmax; i++) {
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if(FD_ISSET(i, &read_fds)) {
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/* we got one... */
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if(i == listener) {
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/* handle new connections */
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peer_addr_size = sizeof(struct sockaddr_un);
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newfd = accept(sfd, (struct sockaddr *) &peer_addr, &peer_addr_size);
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if (newfd == -1) {
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handle_error("accept");
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}
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else
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{
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printf("Server-accept() is OK...\n");
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FD_SET(newfd, &master); /* add to master set */
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if(newfd > fdmax)
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{ /* keep track of the maximum */
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fdmax = newfd;
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}
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}
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} else {
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nbytes = file_read (i, &buf);
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if ( nbytes == -1) {
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handle_error("file_read");
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} else if( nbytes == 0) {
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printf ("msg received (%d) : %s\n", nbytes, buf);
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/* close it... */
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close(i);
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/* remove from master set */
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FD_CLR(i, &master);
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}else {
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//buf[BUFSIZ - 1] = '\0';
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printf ("msg received (%d) : %s\n", nbytes, buf);
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if (strncmp ("exit", buf, 4) == 0) {
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break;
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}
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// -1 : error, 0 = no new process, 1 = new process
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ret = srv_get_new_process (buf, &tab_proc[cnt]);
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if (ret == -1) {
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fprintf (stderr, "MAIN_LOOP: error service_get_new_process\n");
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continue;
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}
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srv_process_print (&tab_proc[cnt]);
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int ret = pthread_create( &tab_thread[cnt], NULL, &pongd_thread, (void *) &tab_proc[cnt]);
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if (ret) {
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perror("pthread_create()");
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exit(errno);
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} else {
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printf ("\n-------New thread created---------\n");
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}
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printf ("%d applications to serve\n",cnt);
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cnt++;
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}
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}
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}
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}
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if (strncmp ("exit", buf, 4) == 0) {
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break;
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}
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}
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printf("ici\n");
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for (i = 0; i < cnt; i++) {
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pthread_join(tab_thread[i], NULL);
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}
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free(buf);
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close(sfd);
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}
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/*
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@ -3,7 +3,6 @@
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REP=/tmp/ipc/
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SERVICE="pongd"
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NB=10
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# CLEAN UP !
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if [ $# -ne 0 ] && [ "$1" = clean ]
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then
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@ -23,22 +22,26 @@ fi
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for pid in `seq 1 ${NB}`
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do
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# we make the application pipes
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mkfifo ${REP}${pid}-1-1-in 2>/dev/null
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mkfifo ${REP}${pid}-1-1-out 2>/dev/null
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# mkfifo ${REP}${pid}-1-1-in 2>/dev/null
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# mkfifo ${REP}${pid}-1-1-out 2>/dev/null
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# pid index version
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echo "${pid} 1 1" > ${REP}${SERVICE}
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echo "${pid} 1 1" | nc -U ${REP}${SERVICE}
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sleep 1
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# the purpose is to send something in the pipe
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cat /dev/urandom | base64 | head -n 1 > ${REP}${pid}-1-1-out
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# echo "hello world" > ${REP}${pid}-1-out
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#cat /dev/urandom | base64 | head -n 1 > ${REP}${pid}-1-1-out
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echo "exit" | nc -U ${REP}${pid}-1-1
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#echo "exit" | nc -U ${REP}${pid}-1-1
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# the the service will answer with our message
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# the service will answer with our message
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echo "pid : ${pid}"
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cat ${REP}/${pid}-1-1-in
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#cat ${REP}/${pid}-1-1-in
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done
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echo "exit" | nc -U ${REP}${SERVICE}
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echo "clean rep"
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rm ${REP}/*-in
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rm ${REP}/*-out
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#rm ${REP}/*
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#rm ${REP}/*-out
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