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/***************************************************Project Mutator****************************************************/
/*first line intentionally left blank.*/
/*Copyright (C) 2017 Farzad Sadeghi
This source file contains mutator's server as a standalone, mainly for testing purposes.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*/
/**********************************************************************************************************************/
/*macros*/
#define __DBG
#if 0
#undef __DBG
#endif
/**********************************************************************************************************************/
/*inclusion directive*/
#include "mutatorserver.h"
#include "daemon_aux.h"
/*standard headers*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <unistd.h>
/**********************************************************************************************************************/
int main (int argc, char *argv[])
{
int socket_desc, client_sock, socketlength, read_size;
struct sockaddr_in server, client;
char client_message[2000];
FILE* clientistream;
char runresponse[4000];
char NOOUT[]="command did not return any output. could be an error or not.";
/*create socket*/
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if (socket_desc < 0)
{
printf("could not create socket.");
exit(EXIT_FAILURE);
}
puts ("socket created.");
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(8888);
memset(server.sin_zero, 0, 8);
/*Bind*/
if (bind(socket_desc, (struct sockaddr*)&server, sizeof(server)) < 0)
{
perror("bind failed.error.");
return 1;
}
puts("bind done.");
/*Listen*/
listen(socket_desc, 3);
/*Accept incoming connection*/
puts("Waiting for incoming connections...");
socketlength = sizeof(struct sockaddr_in);
/*accept incoming connection from client*/
client_sock = accept(socket_desc, (struct sockaddr*)&client, (socklen_t*)&socketlength);
if (client_sock < 0)
{
perror("could not accept incoming client.");
return 1;
}
puts("connection accpeted.");
/*recieve a message from client*/
while((read_size = recv(client_sock, client_message, 2000, 0)) > 0)
{
fflush(stdin);
puts("got command from client.");
if (cleanser(client_message))
{
/*open pipe, run command*/
clientistream = popen(client_message, "r");
}
else
{
puts("what are you trying to do exactly?");
continue;
}
if (clientistream == NULL)
{
perror("client command did not run successfully.");
}
puts ("task completed.");
for (int i = 0; i < 2000; ++i)
{
client_message[i] = 0;
}
if (fgets(runresponse, sizeof(runresponse), clientistream) == NULL)
{
/*say there was nothing on stdout to send.*/
write(client_sock, NOOUT, strlen(NOOUT));
}
rewind(clientistream);
while (fgets(runresponse, sizeof(runresponse), clientistream) != NULL)
{
#if defined(__DBG)
puts("command stdout:");
puts(runresponse);
#endif
write(client_sock, runresponse, strlen(runresponse));
}
puts("response sent to client.");
fflush(stdout);
/*close pipe*/
pclose(clientistream);
#if defined(__DBG)
puts("checkpoint 1");
#endif
}
#if defined(__DBG)
puts("checkpoint 10");
#endif
if (read_size == 0)
{
puts("client disconnected");
fflush(stdout);
}
else if (read_size == -1)
{
perror("recv failed.");
}
else
{
/*intentionally left blank*/
}
return 0;
}
/**********************************************************************************************************************/
/*last line intentionally left blank*/
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