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/* Copyright 2003 Roger Dingledine */
/* See LICENSE for licensing information */
/* $Id$ */
#include "../or/or.h"
#ifdef _MSC_VER
#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 _MSC_VER
/* 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 _MSC_VER
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. */
} else {
/* Parent */
return 0;
}
#endif
}
void spawn_exit()
{
#ifdef _MSC_VER
_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_XXX
/* 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 _MSC_VER
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 _MSC_VER
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
}
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