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libipc-old/examples/pong.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../src/ipc.h"
#define MSG "coucou"
#define SERVICE_NAME "pong"
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#define PRINTERR(ret,msg) {\
const char * err = ipc_errors_get (ret.error_code);\
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fprintf(stderr, "error while %s: %s\n", msg, err);\
}
void chomp (char *str, ssize_t len)
{
if (str[len - 1] == '\n') {
str[len - 1] = '\0';
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}
if (str[len - 2] == '\n') {
str[len - 2] = '\0';
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}
}
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struct ipc_ctx *ctx = NULL;
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void non_interactive (int verbosity, size_t nb_msg, char *msg_str)
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{
SECURE_DECLARATION (struct ipc_message, m);
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// init service
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TEST_IPC_QUIT_ON_ERROR (ipc_connection (ctx, SERVICE_NAME), EXIT_FAILURE);
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if (verbosity > 1) {
printf ("msg to send (%ld): %.*s\n", (ssize_t) strlen (MSG) + 1, (int)strlen (MSG), MSG);
}
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for (size_t i = 0 ; i < nb_msg ; i++) {
TEST_IPC_QUIT_ON_ERROR (ipc_message_format_data (&m, 42, msg_str, (ssize_t) strlen (msg_str) + 1), EXIT_FAILURE);
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TEST_IPC_QUIT_ON_ERROR (ipc_write_fd (ctx->pollfd[0].fd, &m), EXIT_FAILURE);
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ipc_message_empty (&m);
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TEST_IPC_QUIT_ON_ERROR (ipc_read (ctx, 0 /* read from the only valid index */, &m), EXIT_FAILURE);
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if (verbosity > 1) {
printf ("msg recv (type: %u): %s\n", m.user_type, m.payload);
}
ipc_message_empty (&m);
}
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TEST_IPC_QUIT_ON_ERROR (ipc_close_all (ctx), EXIT_FAILURE);
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}
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void interactive ()
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{
// init service
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TEST_IPC_QUIT_ON_ERROR (ipc_connection (ctx, SERVICE_NAME), EXIT_FAILURE);
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SECURE_DECLARATION (struct ipc_error, ret);
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SECURE_DECLARATION (struct ipc_event, event);
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ipc_add_fd (ctx, 0); // add STDIN
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ipc_ctx_print (ctx);
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int timer = 10000;
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while (1) {
printf ("msg to send: ");
fflush (stdout);
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TEST_IPC_WAIT_EVENT_Q (ipc_events_loop (ctx, &event, &timer), EXIT_FAILURE);
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switch (event.type) {
case IPC_EVENT_TYPE_EXTRA_SOCKET:
{
// structure not read, should read the message here
ssize_t len;
char buf[4096];
memset (buf, 0, 4096);
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len = read (event.origin, buf, 4096);
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buf[len - 1] = '\0';
chomp (buf, len);
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#if 0
printf ("\n");
printf ("message to send: %.*s\n", (int)len, buf);
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#endif
// in case we want to quit the program
if (len == 0 || strncmp (buf, "quit", 4) == 0 || strncmp (buf, "exit", 4) == 0) {
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struct ipc_error ret = ipc_close_all (ctx);
if (ret.error_code != IPC_ERROR_NONE) {
fprintf (stderr, "%s", ret.error_message);
exit (EXIT_FAILURE);
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}
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ipc_ctx_free (ctx);
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exit (EXIT_SUCCESS);
}
// send the message read on STDIN
struct ipc_message *m = NULL;
SECURE_BUFFER_HEAP_ALLOCATION (m, sizeof (struct ipc_message),, return; );
struct ipc_error ret = ipc_message_format_data (m, 42, buf, len);
if (ret.error_code != IPC_ERROR_NONE) {
fprintf (stderr, "%s", ret.error_message);
exit (EXIT_FAILURE);
}
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#if 0
printf ("\n");
printf ("right before sending a message\n");
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#endif
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ret = ipc_write (ctx, m);
if (ret.error_code != IPC_ERROR_NONE) {
fprintf (stderr, "%s", ret.error_message);
exit (EXIT_FAILURE);
}
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#if 0
printf ("right after sending a message\n");
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#endif
ipc_message_empty (m);
free (m);
}
break;
case IPC_EVENT_TYPE_MESSAGE:
{
struct ipc_message *m = event.m;
printf ("\rmsg recv: %.*s\n", m->length, m->payload);
};
break;
case IPC_EVENT_TYPE_DISCONNECTION:
case IPC_EVENT_TYPE_NOT_SET:
case IPC_EVENT_TYPE_CONNECTION:
case IPC_EVENT_TYPE_ERROR:
default:
fprintf (stderr, "should not happen, event type %d\n", event.type);
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}
}
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}
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int main (int argc, char *argv[])
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{
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printf("usage: %s [verbosity #messages message]", argv[0]);
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ctx = malloc (sizeof (struct ipc_ctx));
memset (ctx, 0, sizeof (struct ipc_ctx));
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if (argc == 4)
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non_interactive (atoi(argv[1]), (size_t) atoi(argv[2]), argv[3]);
else
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interactive ();
return EXIT_SUCCESS;
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}