1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/***************************************************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"
/*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);
/*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.");
/*open pipe, run command*/
clientistream = popen(client_message, "r");
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*/
|
