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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/* Copyright 2003 Roger Dingledine */
/* See LICENSE for licensing information */
/* $Id$ */
#include "../or/or.h"
#ifdef MS_WINDOWS
#include <io.h>
#include <limits.h>
#include <process.h>
#endif
#include "util.h"
#include "log.h"
void *tor_malloc(size_t size) {
void *result;
result = malloc(size);
if(!result) {
log_fn(LOG_ERR, "Out of memory. Dying.");
exit(1);
}
return result;
}
void
my_gettimeofday(struct timeval *timeval)
{
#ifdef HAVE_GETTIMEOFDAY
if (gettimeofday(timeval, NULL)) {
log_fn(LOG_ERR, "gettimeofday failed.");
/* If gettimeofday dies, we have either given a bad timezone (we didn't),
or segfaulted.*/
exit(1);
}
#elif defined(HAVE_FTIME)
ftime(timeval);
#else
#error "No way to get time."
#endif
return;
}
long
tv_udiff(struct timeval *start, struct timeval *end)
{
long udiff;
long end_usec = end->tv_usec;
long secdiff = end->tv_sec - start->tv_sec;
if (secdiff+1 > LONG_MAX/1000000) {
log_fn(LOG_NOTICE, "comparing times too far apart.");
return LONG_MAX;
}
udiff = secdiff*1000000L + (end_usec - start->tv_usec);
if(udiff < 0) {
log_fn(LOG_NOTICE, "start is after end. Returning 0.");
return 0;
}
return udiff;
}
int tv_cmp(struct timeval *a, struct timeval *b) {
if (a->tv_sec > b->tv_sec)
return 1;
if (a->tv_sec < b->tv_sec)
return -1;
if (a->tv_usec > b->tv_usec)
return 1;
if (a->tv_usec < b->tv_usec)
return -1;
return 0;
}
void tv_add(struct timeval *a, struct timeval *b) {
a->tv_usec += b->tv_usec;
a->tv_sec += b->tv_sec + (a->tv_usec / 1000000);
a->tv_usec %= 1000000;
}
void tv_addms(struct timeval *a, long ms) {
a->tv_usec += (ms * 1000) % 1000000;
a->tv_sec += ((ms * 1000) / 1000000) + (a->tv_usec / 1000000);
a->tv_usec %= 1000000;
}
void set_socket_nonblocking(int socket)
{
#ifdef MS_WINDOWS
/* Yes means no and no means yes. Do you not want to be nonblocking? */
int nonblocking = 0;
ioctlsocket(socket, FIONBIO, (unsigned long*) &nonblocking);
#else
fcntl(socket, F_SETFL, O_NONBLOCK);
#endif
}
int spawn_func(int (*func)(void *), void *data)
{
#ifdef MS_WINDOWS
int rv;
rv = _beginthread(func, 0, data);
if (rv == (unsigned long) -1)
return -1;
return 0;
#else
pid_t pid;
pid = fork();
if (pid<0)
return -1;
if (pid==0) {
/* Child */
func(data);
assert(0); /* Should never reach here. */
return 0; /* suppress "control-reaches-end-of-non-void" warning. */
} else {
/* Parent */
return 0;
}
#endif
}
void spawn_exit()
{
#ifdef MS_WINDOWS
_endthread();
#else
exit(0);
#endif
}
/* Fake socket pair over TCP. Code adapted from perl 5.8.0's util.c */
int
tor_socketpair(int family, int type, int protocol, int fd[2])
{
#ifdef HAVE_SOCKETPAIR_XXXX
/* For testing purposes, we never fall back to real socketpairs. */
return socketpair(family, type, protocol, fd);
#else
int listener = -1;
int connector = -1;
int acceptor = -1;
struct sockaddr_in listen_addr;
struct sockaddr_in connect_addr;
size_t size;
if (protocol
#ifdef AF_UNIX
|| family != AF_UNIX
#endif
) {
#ifdef MS_WINDOWS
errno = WSAEAFNOSUPPORT;
#else
errno = EAFNOSUPPORT;
#endif
return -1;
}
if (!fd) {
errno = EINVAL;
return -1;
}
listener = socket(AF_INET, type, 0);
if (listener == -1)
return -1;
memset (&listen_addr, 0, sizeof (listen_addr));
listen_addr.sin_family = AF_INET;
listen_addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
listen_addr.sin_port = 0; /* kernel choses port. */
if (bind(listener, (struct sockaddr *) &listen_addr, sizeof (listen_addr))
== -1)
goto tidy_up_and_fail;
if (listen(listener, 1) == -1)
goto tidy_up_and_fail;
connector = socket(AF_INET, type, 0);
if (connector == -1)
goto tidy_up_and_fail;
/* We want to find out the port number to connect to. */
size = sizeof (connect_addr);
if (getsockname(listener, (struct sockaddr *) &connect_addr, &size) == -1)
goto tidy_up_and_fail;
if (size != sizeof (connect_addr))
goto abort_tidy_up_and_fail;
if (connect(connector, (struct sockaddr *) &connect_addr,
sizeof (connect_addr)) == -1)
goto tidy_up_and_fail;
size = sizeof (listen_addr);
acceptor = accept(listener, (struct sockaddr *) &listen_addr, &size);
if (acceptor == -1)
goto tidy_up_and_fail;
if (size != sizeof(listen_addr))
goto abort_tidy_up_and_fail;
close(listener);
/* Now check we are talking to ourself by matching port and host on the
two sockets. */
if (getsockname(connector, (struct sockaddr *) &connect_addr, &size) == -1)
goto tidy_up_and_fail;
if (size != sizeof (connect_addr)
|| listen_addr.sin_family != connect_addr.sin_family
|| listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
|| listen_addr.sin_port != connect_addr.sin_port) {
goto abort_tidy_up_and_fail;
}
fd[0] = connector;
fd[1] = acceptor;
return 0;
abort_tidy_up_and_fail:
#ifdef MS_WINDOWS
errno = WSAECONNABORTED;
#else
errno = ECONNABORTED; /* I hope this is portable and appropriate. */
#endif
tidy_up_and_fail:
{
int save_errno = errno;
if (listener != -1)
close(listener);
if (connector != -1)
close(connector);
if (acceptor != -1)
close(acceptor);
errno = save_errno;
return -1;
}
#endif
}
#ifdef MS_WINDOWS
int correct_socket_errno(int s)
{
int optval, optvallen=sizeof(optval);
assert(errno == WSAEWOULDBLOCK);
if (getsockopt(s, SOL_SOCKET, SO_ERROR, (void*)&optval, &optvallen))
return errno;
if (optval)
return optval;
return WSAEWOULDBLOCK;
}
#endif
|