100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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// Do not forget to install libipc.
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#include <libipc.h>
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#define SERVICE "pong"
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#define SERVICE_LEN 4
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#define MAX_MSG_SIZE 10000
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int err(void *ctx, char *msg) {
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printf("error: %s\n", msg);
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printf("Free context\n");
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ipc_context_deinit (&ctx);
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return 1;
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}
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int main(void) {
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int ret = 0;
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int servicefd = 0;
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char message[MAX_MSG_SIZE];
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memset (message, 0, 1000);
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size_t size = MAX_MSG_SIZE;
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char event_type;
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size_t index = 0;
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int originfd = 0;
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void *ctx = NULL;
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printf ("Init context.\n");
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ret = ipc_context_init (&ctx);
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if (ret != 0) {
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printf ("Cannot init context.\n");
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return 1;
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}
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printf ("Connect to a 'pong' service.\n");
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ret = ipc_connect_service (ctx, &servicefd, SERVICE, SERVICE_LEN);
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if (ret != 0) {
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return err(ctx, "Cannot connect to a service.");
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}
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printf ("Let's schedule a message.\n");
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ret = ipc_schedule (ctx, servicefd, "hello, plz bounce me", 21);
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if (ret != 0) {
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return err(ctx, "Cannot schedule a message.");
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}
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printf ("Let's set the timer to one second.\n");
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ipc_context_timer (ctx, 1000);
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printf ("Let's loop over events.\n");
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char should_continue = 1;
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size_t count = 0;
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while(should_continue) {
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size = MAX_MSG_SIZE;
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ret = ipc_wait_event (ctx, &event_type, &index, &originfd, message, &size);
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if (ret != 0) {
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return err(ctx, "Error while waiting for an event.");
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}
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printf ("EVENT %lu\t", count++);
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switch ((enum event_types) event_type) {
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case ERROR: return err(ctx, "Error.");
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case EXTERNAL: return err(ctx, "External (shouldn't happen).");
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case SWITCH_RX: return err(ctx, "Switch RX (shouldn't happen).");
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case SWITCH_TX: return err(ctx, "Switch TX (shouldn't happen).");
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case CONNECTION: return err(ctx, "Connection (shouldn't happen).");
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case DISCONNECTION: return err(ctx, "Disconnection (shouldn't happen).");
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case TIMER: { printf ("TIMER.\n"); break; }
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case MESSAGE_TX: { printf ("A message has been sent.\n"); break; }
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case MESSAGE_RX: {
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if (size == 0) {
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printf ("No message returned.\n");
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printf ("Deinit context\n");
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ipc_context_deinit (&ctx);
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return 1;
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}
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message[size] = '\0';
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printf ("Response (size %lu): %s.\n", size, message);
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// We received the response, quitting.
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should_continue = 0;
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break;
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}
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}
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}
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printf ("Deinit context\n");
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ipc_context_deinit (&ctx);
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printf ("Context freed.\n");
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return 0;
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}
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