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libipc-old/examples/pongd.c

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#include "../src/ipc.h"
#include <signal.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#define PONGD_SERVICE_NAME "pong"
#define PONGD_VERBOSE
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#define PRINTERR(ret,msg) {\
fprintf(stderr, "error while %s: %s\n", msg, ret.error_message);\
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}
int cpt = 0;
struct ipc_connection_info *srv = NULL;
struct ipc_connection_infos *clients = NULL;
void main_loop ()
{
long timer = 10;
SECURE_DECLARATION (struct ipc_error, ret);
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clients = malloc (sizeof (struct ipc_connection_infos));
memset (clients, 0, sizeof (struct ipc_connection_infos));
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SECURE_DECLARATION (struct ipc_event, event);
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event.type = IPC_EVENT_TYPE_NOT_SET;
while (1) {
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// ipc_service_poll_event provides one event at a time
// warning: event->m is free'ed if not NULL
TEST_IPC_WAIT_EVENT_Q (ipc_wait_event (clients, srv, &event, &timer), EXIT_FAILURE);
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switch (event.type) {
case IPC_EVENT_TYPE_CONNECTION:
{
cpt++;
#ifdef PONGD_VERBOSE
printf ("connection: %d clients connected, new client is %d\n", cpt, (event.origin)->fd);
#endif
};
break;
case IPC_EVENT_TYPE_DISCONNECTION:
{
cpt--;
#ifdef PONGD_VERBOSE
printf ("disconnection: %d clients remaining\n", cpt);
#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;
#ifdef PONGD_VERBOSE
if (m->length > 0) {
printf ("message received (type %d, user type %d, size %u bytes): %.*s\n",
m->type, m->user_type, m->length, m->length, m->payload);
} else {
printf ("message with a 0-byte size :(\n");
}
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#endif
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ret = ipc_write (event.origin, m);
if (ret.error_code != IPC_ERROR_NONE) {
PRINTERR (ret, "server write");
}
printf ("message sent\n");
};
break;
case IPC_EVENT_TYPE_TIMER:{
printf ("timer\n");
timer = 10;
};
break;
case IPC_EVENT_TYPE_ERROR:
{
cpt--;
fprintf (stderr, "a problem happened with client %d (now disconnected)", (event.origin)->fd);
fprintf (stderr, ", %d clients remaining\n", cpt);
// free the ipc_client structure
free (event.origin);
};
break;
default:
{
fprintf (stderr, "there must be a problem, event not set\n");
};
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}
}
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// should never go there
exit (EXIT_FAILURE);
}
void exit_program (int signal)
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{
printf ("Quitting, signal: %d\n", signal);
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// free remaining clients
for (size_t i = 0; i < clients->size; i++) {
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struct ipc_connection_info *cli = clients->cinfos[i];
if (cli != NULL) {
free (cli);
}
clients->cinfos[i] = NULL;
}
ipc_connections_free (clients);
free (clients);
// the application will shut down, and close the service
struct ipc_error ret = ipc_server_close (srv);
if (ret.error_code != IPC_ERROR_NONE) {
PRINTERR (ret, "server close");
}
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free (srv);
exit (EXIT_SUCCESS);
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}
/*
* service ping-pong: send back everything sent by the clients
* stop the program on SIG{TERM,INT,ALRM,USR{1,2},HUP} signals
*/
int main (int argc, char *argv[], char **env)
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{
argc = argc; // warnings
argv = argv; // warnings
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printf ("pid = %d\n", getpid ());
srv = malloc (sizeof (struct ipc_connection_info));
if (srv == NULL) {
exit (EXIT_FAILURE);
}
memset (srv, 0, sizeof (struct ipc_connection_info));
srv->type = '\0';
srv->index = 0;
srv->version = 0;
srv->fd = 0;
srv->spath = NULL;
struct ipc_error ret = ipc_server_init (env, srv, PONGD_SERVICE_NAME);
if (ret.error_code != IPC_ERROR_NONE) {
PRINTERR (ret, "server init");
return EXIT_FAILURE;
}
printf ("Listening on %s.\n", srv->spath);
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);
signal (SIGINT, exit_program);
// 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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}