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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
#include <iostream>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include "../datatypes.h"
#include "../log.h"
#include "../signalController.h"
#include "../PracticalSocket.h"
#include "../buffer.h"
#include "options.h"
#include <map>
#define MAX_PACKET_SIZE 1500
class ControlHost : public Host
{
public:
ControlHost() : Host("",0) {};
bool operator<(const ControlHost& cmp_to)
{
return port_ < cmp_to.port_;
}
};
class ControlHostMap
{
public:
private:
Mutex mutex;
std::map<ControlHost, std::pair<UDPSocket*, pthread_t> > control_hosts_;
};
void* sender(void* dont_use_me)
{
try
{
HostList remote_host_list(gOpt.getRemoteHosts());
UDPSocket control_sock(gOpt.getControlInterface().addr_, gOpt.getControlInterface().port_);
Buffer buf(u_int32_t(MAX_PACKET_SIZE));
string remote_host;
u_int16_t remote_port;
while(1) {
buf.setLength(MAX_PACKET_SIZE);
u_int32_t len = control_sock.recvFrom(buf.getBuf(), buf.getLength(), remote_host, remote_port);
buf.setLength(len);
//TODO????//TODO????//TODO????//TODO????//TODO????//TODO????//TODO???? control.setHost(remote_host, remote_port);
// SenderThreadParam receiverParam = {control_host, control_sock, sock, gOpt.getRemoteHosts().front()};
// pthread_t receiverThread;
// pthread_create(&receiverThread, NULL, receiver, &receiverParam);
// pthread_detach(receiverThread);
HostList::const_iterator it = remote_host_list.begin();
// for(;it != remote_host_list.end(); it++)
// param->sock_.sendTo(buf.getBuf(), buf.getLength(), it->addr_, it->port_);
}
}
catch(std::exception &e)
{
cLog.msg(Log::PRIO_ERR) << "sender exiting because: " << e.what() << std::endl;
}
pthread_exit(NULL);
}
void* receiver(void* p)
{
// SenderThreadParam* param = reinterpret_cast<SenderThreadParam*>(p);
// try
// {
// Buffer buf(u_int32_t(MAX_PACKET_SIZE));
// string remote_host;
// u_int16_t remote_port;
// while(1) {
// buf.setLength(MAX_PACKET_SIZE);
// u_int32_t len = param->sock_.recvFrom(buf.getBuf(), buf.getLength(), remote_host, remote_port);
// buf.setLength(len);
// if(remote_host != param->first_receiver_.addr_ || remote_port != param->first_receiver_.port_)
// continue;
// Host control_host = param->control_.getHost();
// if(control_host.addr_ == "" || !control_host.port_)
// {
// cLog.msg(Log::PRIO_NOTICE) << "no control host detected till now, ignoring packet";
// continue;
// }
// param->control_sock_.sendTo(buf.getBuf(), buf.getLength(), control_host.addr_, control_host.port_);
// }
// }
// catch(std::exception &e)
// {
// cLog.msg(Log::PRIO_ERR) << "receiver exiting because: " << e.what() << std::endl;
// }
// pthread_exit(NULL);
}
void chrootAndDrop(string const& chrootdir, string const& username)
{
if (getuid() != 0)
{
std::cerr << "this programm has to be run as root in order to run in a chroot" << std::endl;
exit(-1);
}
struct passwd *pw = getpwnam(username.c_str());
if(pw) {
if(chroot(chrootdir.c_str()))
{
std::cerr << "can't chroot to " << chrootdir << std::endl;
exit(-1);
}
std::cout << "we are in chroot jail (" << chrootdir << ") now" << std::endl;
chdir("/");
if (initgroups(pw->pw_name, pw->pw_gid) || setgid(pw->pw_gid) || setuid(pw->pw_uid))
{
std::cerr << "can't drop to user " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
exit(-1);
}
std::cout << "dropped user to " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
}
else
{
std::cerr << "unknown user " << username << std::endl;
exit(-1);
}
}
void daemonize()
{
pid_t pid;
pid = fork();
if(pid) exit(0);
setsid();
pid = fork();
if(pid) exit(0);
std::cout << "running in background now..." << std::endl;
int fd;
for (fd=getdtablesize();fd>=0;--fd) // close all file descriptors
close(fd);
fd=open("/dev/null",O_RDWR); // stdin
dup(fd); // stdout
dup(fd); // stderr
umask(027);
}
int main(int argc, char* argv[])
{
std::cout << "anyrtpproxy" << std::endl;
if(!gOpt.parse(argc, argv))
{
gOpt.printUsage();
exit(-1);
}
if(gOpt.getChroot())
chrootAndDrop(gOpt.getChrootDir(), gOpt.getUsername());
if(gOpt.getDaemonize())
daemonize();
cLog.setLogName("anyrtpproxy");
cLog.msg(Log::PRIO_NOTICE) << "anyrtpproxy started...";
SignalController sig;
sig.init();
pthread_t senderThread;
pthread_create(&senderThread, NULL, sender, NULL);
pthread_detach(senderThread);
int ret = sig.run();
return ret;
}
|
