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libipc-old/pong/app/pongd.c

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#include "../../core/ipc.h"
#include "../../core/error.h"
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#include <signal.h>
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#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#define PONGD_SERVICE_NAME "pongd"
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#define PONGD_PRINT_MESSAGES
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int cpt = 0;
struct ipc_service *srv = 0;
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struct ipc_clients *clients;
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void main_loop ()
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{
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int ret = 0;
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clients = malloc (sizeof (struct ipc_clients));
memset(clients, 0, sizeof(struct ipc_clients));
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struct ipc_event event;
memset(&event, 0, sizeof (struct ipc_event));
event.type = IPC_EVENT_TYPE_NOT_SET;
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while(1) {
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// ipc_service_poll_event provides one event at a time
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// warning: event->m is free'ed if not NULL
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ret = ipc_service_poll_event (clients, srv, &event);
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if (ret != 0) {
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handle_error("ipc_service_poll_event != 0");
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// the application will shut down, and close the service
if (ipc_server_close (srv) < 0) {
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handle_error("ipc_server_close < 0");
}
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exit (EXIT_FAILURE);
}
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switch (event.type) {
case IPC_EVENT_TYPE_CONNECTION:
{
cpt++;
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#ifdef PONGD_PRINT_MESSAGES
printf ("connection: client fd %d, %d clients connected\n"
, ((struct ipc_client*) event.origin)->proc_fd, cpt);
#endif
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};
break;
case IPC_EVENT_TYPE_DISCONNECTION:
{
cpt--;
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#ifdef PONGD_PRINT_MESSAGES
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printf ("disconnection: %d clients remaining\n", cpt);
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#endif
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// free the ipc_client structure
free (event.origin);
};
break;
case IPC_EVENT_TYPE_MESSAGE:
{
struct ipc_message *m = event.m;
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#ifdef PONGD_PRINT_MESSAGES
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if (m->length > 0) {
printf ("message received (type %d): %.*s\n", m->type, m->length, m->payload);
}
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#endif
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if (ipc_server_write (event.origin, m) < 0) {
handle_err( "handle_new_msg", "server_write < 0");
}
};
break;
case IPC_EVENT_TYPE_ERROR:
{
fprintf (stderr, "a problem happened with client %d\n"
, ((struct ipc_client*) event.origin)->proc_fd);
};
break;
default :
{
fprintf (stderr, "there must be a problem, event not set\n");
};
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}
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}
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// should never go there
exit (1);
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}
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void exit_program(int signal)
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{
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printf("Quitting, signal: %d\n", signal);
// free remaining clients
for (int i = 0; i < clients->size ; i++) {
struct ipc_client *cli = clients->clients[i];
// TODO: replace with specific ipc_client_empty function
if (cli != NULL) {
// ipc_client_empty (cli);
free (cli);
}
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clients->clients[i] = NULL;
}
ipc_clients_free (clients);
free (clients);
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// the application will shut down, and close the service
if (ipc_server_close (srv) < 0) {
handle_error("ipc_server_close < 0");
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}
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free (srv);
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exit(EXIT_SUCCESS);
}
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/*
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* service ping-pong: send back everything sent by the clients
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* stop the program on SIG{TERM,INT,ALRM,USR{1,2},HUP} signals
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*/
int main(int argc, char * argv[], char **env)
{
argc = argc; // warnings
argv = argv; // warnings
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printf ("pid = %d\n", getpid ());
srv = malloc (sizeof (struct ipc_service));
if (srv == NULL) {
exit (1);
}
memset (srv, 0, sizeof (struct ipc_service));
srv->index = 0;
srv->version = 0;
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// unlink("/tmp/ipc/pongd-0-0");
if (ipc_server_init (env, srv, PONGD_SERVICE_NAME) < 0) {
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handle_error("ipc_server_init < 0");
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return EXIT_FAILURE;
}
printf ("Listening on %s.\n", srv->spath);
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printf("MAIN: server created\n" );
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signal (SIGHUP, exit_program);
signal (SIGALRM, exit_program);
signal (SIGUSR1, exit_program);
signal (SIGUSR2, exit_program);
signal (SIGTERM, exit_program);
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signal (SIGINT, exit_program);
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// the service will loop until the end of time, or a signal
main_loop ();
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// main_loop should not return
return EXIT_FAILURE;
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}