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/*
* Ouroboros - Copyright (C) 2016
*
* A simple echo application
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdbool.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <ouroboros/dev.h>
#define DIF_NAME "*"
void shutdown_server(int signo)
{
char * dif = DIF_NAME;
if (ap_unreg(SERVER_AP_NAME, &dif, 1)) {
printf("Failed to unregister application\n");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
int server_main()
{
int server_fd = 0;
int client_fd = 0;
char * dif = DIF_NAME;
char * client_name = NULL;
uint8_t buf[BUF_SIZE];
ssize_t count = 0;
printf("Starting the server\n");
/* Manual cleanup is required for now */
if (signal(SIGINT, shutdown_server) == SIG_ERR) {
printf("Can't install signal handler\n");
return -1;
}
server_fd = ap_reg(SERVER_AP_NAME, &dif, 1);
if (server_fd < 0) {
printf("Failed to register application\n");
return -1;
}
printf("Echo server started...");
while (true) {
client_fd = flow_accept(server_fd,
client_name, NULL);
if (client_fd < 0) {
continue;
}
printf("New flow from %s", client_name);
if (flow_alloc_resp(client_fd, 0)) {
printf("Failed to give an allocate response\n");
flow_dealloc(client_fd);
continue;
}
count = flow_read(client_fd, buf, BUF_SIZE);
if (count < 0) {
printf("Failed to read SDU\n");
flow_dealloc(client_fd);
continue;
}
printf("Message from client is %.*s\n", (int) count, buf);
if (flow_write(client_fd, buf, count) == -1) {
printf("Failed to write SDU\n");
flow_dealloc(client_fd);
continue;
}
flow_dealloc(client_fd);
}
return 0;
}
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