static void
bufferevent_run_deferred_callbacks_locked(struct deferred_cb *_, void *arg)
{
struct bufferevent_private *bufev_private = arg;
struct bufferevent *bufev = &bufev_private->bev;
BEV_LOCK(bufev);
if ((bufev_private->eventcb_pending & BEV_EVENT_CONNECTED) &&
bufev->errorcb) {
/* The "connected" happened before any reads or writes, so
send it first. */
bufev_private->eventcb_pending &= ~BEV_EVENT_CONNECTED;
bufev->errorcb(bufev, BEV_EVENT_CONNECTED, bufev->cbarg);
}
if (bufev_private->readcb_pending && bufev->readcb) {
bufev_private->readcb_pending = 0;
bufev->readcb(bufev, bufev->cbarg);
}
if (bufev_private->writecb_pending && bufev->writecb) {
bufev_private->writecb_pending = 0;
bufev->writecb(bufev, bufev->cbarg);
}
if (bufev_private->eventcb_pending && bufev->errorcb) {
short what = bufev_private->eventcb_pending;
int err = bufev_private->errno_pending;
bufev_private->eventcb_pending = 0;
bufev_private->errno_pending = 0;
EVUTIL_SET_SOCKET_ERROR(err);
bufev->errorcb(bufev, what, bufev->cbarg);
}
_bufferevent_decref_and_unlock(bufev);
}
evutil_socket_t bind_socket_ai_(struct evutil_addrinfo* ai, int reuse) {
evutil_socket_t fd;
int on = 1, r;
int serrno;
fd = socket(ai ? ai->ai_family : AF_INET, SOCK_STREAM, 0);
if (fd == -1)
return -1;
if (evutil_make_socket_nonblocking(fd) < 0)
goto out;
if (evutil_make_socket_closeonexec(fd) < 0)
goto out;
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof(on));
if (reuse)
evutil_make_listen_socket_reuseable(fd);
if (ai != NULL) {
r = bind(fd, ai->ai_addr, (ev_socklen_t)ai->ai_addrlen);
if (r == -1)
goto out;
}
return (fd);
out:
serrno = EVUTIL_SOCKET_ERROR();
evutil_closesocket(fd);
EVUTIL_SET_SOCKET_ERROR(serrno);
return -1;
}
//信号处理函数
static void __cdecl
evsig_handler(int sig)
{
int save_errno = errno;
#ifdef WIN32
int socket_errno = EVUTIL_SOCKET_ERROR();
#endif
ev_uint8_t msg;
if (evsig_base == NULL) {
event_warnx(
"%s: received signal %d, but have no base configured",
__func__, sig);
return;
}
#ifndef _EVENT_HAVE_SIGACTION
signal(sig, evsig_handler);
#endif
/* Wake up our notification mechanism */
msg = sig;
send(evsig_base_fd, (char*)&msg, 1, 0);//将激活的信号发送给base
errno = save_errno;
#ifdef WIN32
EVUTIL_SET_SOCKET_ERROR(socket_errno);
#endif
}
static void __cdecl
evsig_handler(int sig)
{
int save_errno = errno;
#ifdef _WIN32
int socket_errno = EVUTIL_SOCKET_ERROR();
#endif
ev_uint8_t msg;
if (evsig_base == NULL) {
event_warnx(
"%s: received signal %d, but have no base configured",
__func__, sig);
return;
}
#ifndef EVENT__HAVE_SIGACTION
signal(sig, evsig_handler);
#endif
/* Wake up our notification mechanism */
msg = sig;
#ifdef _WIN32
send(evsig_base_fd, (char*)&msg, 1, 0);
#else
{
int r = write(evsig_base_fd, (char*)&msg, 1);
(void)r; /* Suppress 'unused return value' and 'unused var' */
}
#endif
errno = save_errno;
#ifdef _WIN32
EVUTIL_SET_SOCKET_ERROR(socket_errno);
#endif
}
static int
tr_peerIoTryWrite( tr_peerIo * io, size_t howmuch )
{
int n = 0;
if(( howmuch = tr_bandwidthClamp( &io->bandwidth, TR_UP, howmuch )))
{
int e;
EVUTIL_SET_SOCKET_ERROR( 0 );
n = tr_evbuffer_write( io, io->socket, howmuch );
e = EVUTIL_SOCKET_ERROR( );
if( n > 0 )
didWriteWrapper( io, n );
if( ( n < 0 ) && ( io->gotError ) && ( e != EPIPE ) && ( e != EAGAIN ) && ( e != EINTR ) && ( e != EINPROGRESS ) )
{
char errstr[512];
const short what = EVBUFFER_WRITE | EVBUFFER_ERROR;
tr_net_strerror( errstr, sizeof( errstr ), e );
dbgmsg( io, "tr_peerIoTryWrite got an error. res is %d, what is %hd, errno is %d (%s)", n, what, e, errstr );
if( io->gotError != NULL )
io->gotError( io, what, io->userData );
}
}
return n;
}
static void
evsig_handler(int sig)
{
int save_errno = errno;
#ifdef WIN32
int socket_errno = EVUTIL_SOCKET_ERROR();
#endif
if (evsig_base == NULL) {
event_warn(
"%s: received signal %d, but have no base configured",
__func__, sig);
return;
}
evsig_base->sig.evsigcaught[sig]++;
evsig_base->sig.evsig_caught = 1;
#ifndef _EVENT_HAVE_SIGACTION
signal(sig, evsig_handler);
#endif
/* Wake up our notification mechanism */
send(evsig_base->sig.ev_signal_pair[0], "a", 1, 0);
errno = save_errno;
#ifdef WIN32
EVUTIL_SET_SOCKET_ERROR(socket_errno);
#endif
}
static int
tr_peerIoTryRead( tr_peerIo * io, size_t howmuch )
{
int res = 0;
if(( howmuch = tr_bandwidthClamp( &io->bandwidth, TR_DOWN, howmuch )))
{
int e;
EVUTIL_SET_SOCKET_ERROR( 0 );
res = evbuffer_read( io->inbuf, io->socket, (int)howmuch );
e = EVUTIL_SOCKET_ERROR( );
dbgmsg( io, "read %d from peer (%s)", res, (res==-1?strerror(e):"") );
if( EVBUFFER_LENGTH( io->inbuf ) )
canReadWrapper( io );
if( ( res <= 0 ) && ( io->gotError ) && ( e != EAGAIN ) && ( e != EINTR ) && ( e != EINPROGRESS ) )
{
char errstr[512];
short what = EVBUFFER_READ | EVBUFFER_ERROR;
if( res == 0 )
what |= EVBUFFER_EOF;
tr_net_strerror( errstr, sizeof( errstr ), e );
dbgmsg( io, "tr_peerIoTryRead got an error. res is %d, what is %hd, errno is %d (%s)", res, what, e, errstr );
io->gotError( io, what, io->userData );
}
}
return res;
}
static int
tr_evbuffer_write( tr_peerIo * io, int fd, size_t howmuch )
{
int e;
int n;
char errstr[256];
struct evbuffer * buffer = io->outbuf;
howmuch = MIN( EVBUFFER_LENGTH( buffer ), howmuch );
EVUTIL_SET_SOCKET_ERROR( 0 );
#ifdef WIN32
n = (int) send(fd, buffer->buffer, howmuch, 0 );
#else
n = (int) write(fd, buffer->buffer, howmuch );
#endif
e = EVUTIL_SOCKET_ERROR( );
dbgmsg( io, "wrote %d to peer (%s)", n, (n==-1?tr_net_strerror(errstr,sizeof(errstr),e):"") );
if( n > 0 )
evbuffer_drain( buffer, (size_t)n );
/* keep the iobuf's excess capacity from growing too large */
if( EVBUFFER_LENGTH( io->outbuf ) == 0 ) {
evbuffer_free( io->outbuf );
io->outbuf = evbuffer_new( );
}
return n;
}
static void
sock_err_fn(void)
{
evutil_socket_t fd = socket(AF_INET, SOCK_STREAM, 0);
#ifdef _WIN32
EVUTIL_SET_SOCKET_ERROR(WSAEWOULDBLOCK);
#else
errno = EAGAIN;
#endif
event_sock_err(20, fd, "Unhappy socket");
}
static void
bufferevent_run_deferred_callbacks_unlocked(struct deferred_cb *_, void *arg)
{
struct bufferevent_private *bufev_private = arg;
struct bufferevent *bufev = &bufev_private->bev;
BEV_LOCK(bufev);
#define UNLOCKED(stmt) \
do { BEV_UNLOCK(bufev); stmt; BEV_LOCK(bufev); } while(0)
if ((bufev_private->eventcb_pending & BEV_EVENT_CONNECTED) &&
bufev->errorcb) {
/* The "connected" happened before any reads or writes, so
send it first. */
bufferevent_event_cb errorcb = bufev->errorcb;
void *cbarg = bufev->cbarg;
bufev_private->eventcb_pending &= ~BEV_EVENT_CONNECTED;
UNLOCKED(errorcb(bufev, BEV_EVENT_CONNECTED, cbarg));
}
if (bufev_private->readcb_pending && bufev->readcb) {
bufferevent_data_cb readcb = bufev->readcb;
void *cbarg = bufev->cbarg;
bufev_private->readcb_pending = 0;
UNLOCKED(readcb(bufev, cbarg));
}
if (bufev_private->writecb_pending && bufev->writecb) {
bufferevent_data_cb writecb = bufev->writecb;
void *cbarg = bufev->cbarg;
bufev_private->writecb_pending = 0;
UNLOCKED(writecb(bufev, cbarg));
}
if (bufev_private->eventcb_pending && bufev->errorcb) {
bufferevent_event_cb errorcb = bufev->errorcb;
void *cbarg = bufev->cbarg;
short what = bufev_private->eventcb_pending;
int err = bufev_private->errno_pending;
bufev_private->eventcb_pending = 0;
bufev_private->errno_pending = 0;
EVUTIL_SET_SOCKET_ERROR(err);
UNLOCKED(errorcb(bufev,what,cbarg));
}
_bufferevent_decref_and_unlock(bufev);
#undef UNLOCKED
}
int
evutil_socketpair(int family, int type, int protocol, int fd[2])
{
#ifndef WIN32
return socketpair(family, type, protocol, fd);
#else
/* This code is originally from Tor. Used with permission. */
/* This socketpair does not work when localhost is down. So
* it's really not the same thing at all. But it's close enough
* for now, and really, when localhost is down sometimes, we
* have other problems too.
*/
int listener = -1;
int connector = -1;
int acceptor = -1;
struct sockaddr_in listen_addr;
struct sockaddr_in connect_addr;
int size;
int saved_errno = -1;
if (protocol
#ifdef AF_UNIX
|| family != AF_UNIX
#endif
) {
EVUTIL_SET_SOCKET_ERROR(WSAEAFNOSUPPORT);
return -1;
}
if (!fd) {
EVUTIL_SET_SOCKET_ERROR(WSAEINVAL);
return -1;
}
listener = socket(AF_INET, type, 0);
if (listener < 0)
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 chooses 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 < 0)
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 < 0)
goto tidy_up_and_fail;
if (size != sizeof(listen_addr))
goto abort_tidy_up_and_fail;
EVUTIL_CLOSESOCKET(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:
saved_errno = WSAECONNABORTED;
tidy_up_and_fail:
if (saved_errno < 0)
saved_errno = WSAGetLastError();
if (listener != -1)
EVUTIL_CLOSESOCKET(listener);
if (connector != -1)
EVUTIL_CLOSESOCKET(connector);
if (acceptor != -1)
EVUTIL_CLOSESOCKET(acceptor);
EVUTIL_SET_SOCKET_ERROR(saved_errno);
return -1;
#endif
}
static void
test_evutil_log(void *ptr)
{
evutil_socket_t fd = -1;
char buf[128];
event_set_log_callback(logfn);
event_set_fatal_callback(fatalfn);
#define RESET() do { \
logsev = 0; \
if (logmsg) free(logmsg); \
logmsg = NULL; \
} while (0)
#define LOGEQ(sev,msg) do { \
tt_int_op(logsev,==,sev); \
tt_assert(logmsg != NULL); \
tt_str_op(logmsg,==,msg); \
} while (0)
#ifdef CAN_CHECK_ERR
/* We need to disable these tests for now. Previously, the logging
* module didn't enforce the requirement that a fatal callback
* actually exit. Now, it exits no matter what, so if we wan to
* reinstate these tests, we'll need to fork for each one. */
check_error_logging(errx_fn, 2, EVENT_LOG_ERR,
"Fatal error; too many kumquats (5)");
RESET();
#endif
event_warnx("Far too many %s (%d)", "wombats", 99);
LOGEQ(EVENT_LOG_WARN, "Far too many wombats (99)");
RESET();
event_msgx("Connecting lime to coconut");
LOGEQ(EVENT_LOG_MSG, "Connecting lime to coconut");
RESET();
event_debug(("A millisecond passed! We should log that!"));
#ifdef USE_DEBUG
LOGEQ(EVENT_LOG_DEBUG, "A millisecond passed! We should log that!");
#else
tt_int_op(logsev,==,0);
tt_ptr_op(logmsg,==,NULL);
#endif
RESET();
/* Try with an errno. */
errno = ENOENT;
event_warn("Couldn't open %s", "/bad/file");
evutil_snprintf(buf, sizeof(buf),
"Couldn't open /bad/file: %s",strerror(ENOENT));
LOGEQ(EVENT_LOG_WARN,buf);
RESET();
#ifdef CAN_CHECK_ERR
evutil_snprintf(buf, sizeof(buf),
"Couldn't open /very/bad/file: %s",strerror(ENOENT));
check_error_logging(err_fn, 5, EVENT_LOG_ERR, buf);
RESET();
#endif
/* Try with a socket errno. */
fd = socket(AF_INET, SOCK_STREAM, 0);
#ifdef _WIN32
evutil_snprintf(buf, sizeof(buf),
"Unhappy socket: %s",
evutil_socket_error_to_string(WSAEWOULDBLOCK));
EVUTIL_SET_SOCKET_ERROR(WSAEWOULDBLOCK);
#else
evutil_snprintf(buf, sizeof(buf),
"Unhappy socket: %s", strerror(EAGAIN));
errno = EAGAIN;
#endif
event_sock_warn(fd, "Unhappy socket");
LOGEQ(EVENT_LOG_WARN, buf);
RESET();
#ifdef CAN_CHECK_ERR
check_error_logging(sock_err_fn, 20, EVENT_LOG_ERR, buf);
RESET();
#endif
#undef RESET
#undef LOGEQ
end:
if (logmsg)
free(logmsg);
if (fd >= 0)
evutil_closesocket(fd);
}
static void
test_evutil_log(void *ptr)
{
evutil_socket_t fd = -1;
char buf[128];
event_set_log_callback(logfn);
event_set_fatal_callback(fatalfn);
#define RESET() do { \
logsev = exited = exitcode = 0; \
if (logmsg) free(logmsg); \
logmsg = NULL; \
} while (0)
#define LOGEQ(sev,msg) do { \
tt_int_op(logsev,==,sev); \
tt_assert(logmsg != NULL); \
tt_str_op(logmsg,==,msg); \
} while (0)
event_errx(2, "Fatal error; too many kumquats (%d)", 5);
LOGEQ(_EVENT_LOG_ERR, "Fatal error; too many kumquats (5)");
tt_int_op(exitcode,==,2);
RESET();
event_warnx("Far too many %s (%d)", "wombats", 99);
LOGEQ(_EVENT_LOG_WARN, "Far too many wombats (99)");
tt_int_op(exited,==,0);
RESET();
event_msgx("Connecting lime to coconut");
LOGEQ(_EVENT_LOG_MSG, "Connecting lime to coconut");
tt_int_op(exited,==,0);
RESET();
event_debug(("A millisecond passed! We should log that!"));
#ifdef USE_DEBUG
LOGEQ(_EVENT_LOG_DEBUG, "A millisecond passed! We should log that!");
#else
tt_int_op(logsev,==,0);
tt_ptr_op(logmsg,==,NULL);
#endif
RESET();
/* Try with an errno. */
errno = ENOENT;
event_warn("Couldn't open %s", "/bad/file");
evutil_snprintf(buf, sizeof(buf),
"Couldn't open /bad/file: %s",strerror(ENOENT));
LOGEQ(_EVENT_LOG_WARN,buf);
tt_int_op(exited, ==, 0);
RESET();
errno = ENOENT;
event_err(5,"Couldn't open %s", "/very/bad/file");
evutil_snprintf(buf, sizeof(buf),
"Couldn't open /very/bad/file: %s",strerror(ENOENT));
LOGEQ(_EVENT_LOG_ERR,buf);
tt_int_op(exitcode, ==, 5);
RESET();
/* Try with a socket errno. */
fd = socket(AF_INET, SOCK_STREAM, 0);
#ifdef WIN32
evutil_snprintf(buf, sizeof(buf),
"Unhappy socket: %s",
evutil_socket_error_to_string(WSAEWOULDBLOCK));
EVUTIL_SET_SOCKET_ERROR(WSAEWOULDBLOCK);
#else
evutil_snprintf(buf, sizeof(buf),
"Unhappy socket: %s", strerror(EAGAIN));
errno = EAGAIN;
#endif
event_sock_warn(fd, "Unhappy socket");
LOGEQ(_EVENT_LOG_WARN, buf);
tt_int_op(exited,==,0);
RESET();
#ifdef WIN32
EVUTIL_SET_SOCKET_ERROR(WSAEWOULDBLOCK);
#else
errno = EAGAIN;
#endif
event_sock_err(200, fd, "Unhappy socket");
LOGEQ(_EVENT_LOG_ERR, buf);
tt_int_op(exitcode,==,200);
RESET();
#undef RESET
#undef LOGEQ
end:
if (logmsg)
free(logmsg);
if (fd >= 0)
EVUTIL_CLOSESOCKET(fd);
}
int
evutil_socketpair(int family, int type, int protocol, int fd[2])
{
#ifndef WIN32
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;
int size;
int saved_errno = -1;
if (protocol
#ifdef AF_UNIX
|| family != AF_UNIX
#endif
) {
EVUTIL_SET_SOCKET_ERROR(WSAEAFNOSUPPORT);
return -1;
}
if (!fd) {
EVUTIL_SET_SOCKET_ERROR(WSAEINVAL);
return -1;
}
listener = socket(AF_INET, type, 0);
if (listener < 0)
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;
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 < 0)
goto tidy_up_and_fail;
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 < 0)
goto tidy_up_and_fail;
if (size != sizeof(listen_addr))
goto abort_tidy_up_and_fail;
EVUTIL_CLOSESOCKET(listener);
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:
saved_errno = WSAECONNABORTED;
tidy_up_and_fail:
if (saved_errno < 0)
saved_errno = WSAGetLastError();
if (listener != -1)
EVUTIL_CLOSESOCKET(listener);
if (connector != -1)
EVUTIL_CLOSESOCKET(connector);
if (acceptor != -1)
EVUTIL_CLOSESOCKET(acceptor);
EVUTIL_SET_SOCKET_ERROR(saved_errno);
return -1;
#endif
}
static void
event_write_cb( int fd, short event UNUSED, void * vio )
{
int res = 0;
int e;
short what = EVBUFFER_WRITE;
tr_peerIo * io = vio;
size_t howmuch;
const tr_direction dir = TR_UP;
assert( tr_isPeerIo( io ) );
io->hasFinishedConnecting = TRUE;
io->pendingEvents &= ~EV_WRITE;
dbgmsg( io, "libevent says this peer is ready to write" );
/* Write as much as possible, since the socket is non-blocking, write() will
* return if it can't write any more data without blocking */
howmuch = tr_bandwidthClamp( &io->bandwidth, dir, EVBUFFER_LENGTH( io->outbuf ) );
/* if we don't have any bandwidth left, stop writing */
if( howmuch < 1 ) {
tr_peerIoSetEnabled( io, dir, FALSE );
return;
}
EVUTIL_SET_SOCKET_ERROR( 0 );
res = tr_evbuffer_write( io, fd, howmuch );
e = EVUTIL_SOCKET_ERROR( );
if (res == -1) {
if (e == EAGAIN || e == EINTR || e == EINPROGRESS)
goto reschedule;
/* error case */
what |= EVBUFFER_ERROR;
} else if (res == 0) {
/* eof case */
what |= EVBUFFER_EOF;
}
if (res <= 0)
goto error;
if( EVBUFFER_LENGTH( io->outbuf ) )
tr_peerIoSetEnabled( io, dir, TRUE );
didWriteWrapper( io, res );
return;
reschedule:
if( EVBUFFER_LENGTH( io->outbuf ) )
tr_peerIoSetEnabled( io, dir, TRUE );
return;
error:
dbgmsg( io, "event_write_cb got an error. res is %d, what is %hd, errno is %d (%s)", res, what, e, strerror( e ) );
if( io->gotError != NULL )
io->gotError( io, what, io->userData );
}
static void
event_read_cb( int fd, short event UNUSED, void * vio )
{
int res;
int e;
tr_peerIo * io = vio;
/* Limit the input buffer to 256K, so it doesn't grow too large */
unsigned int howmuch;
unsigned int curlen;
const tr_direction dir = TR_DOWN;
const unsigned int max = 256 * 1024;
assert( tr_isPeerIo( io ) );
io->hasFinishedConnecting = TRUE;
io->pendingEvents &= ~EV_READ;
curlen = EVBUFFER_LENGTH( io->inbuf );
howmuch = curlen >= max ? 0 : max - curlen;
howmuch = tr_bandwidthClamp( &io->bandwidth, TR_DOWN, howmuch );
dbgmsg( io, "libevent says this peer is ready to read" );
/* if we don't have any bandwidth left, stop reading */
if( howmuch < 1 ) {
tr_peerIoSetEnabled( io, dir, FALSE );
return;
}
EVUTIL_SET_SOCKET_ERROR( 0 );
res = evbuffer_read( io->inbuf, fd, (int)howmuch );
e = EVUTIL_SOCKET_ERROR( );
if( res > 0 )
{
tr_peerIoSetEnabled( io, dir, TRUE );
/* Invoke the user callback - must always be called last */
canReadWrapper( io );
}
else
{
char errstr[512];
short what = EVBUFFER_READ;
if( res == 0 ) /* EOF */
what |= EVBUFFER_EOF;
else if( res == -1 ) {
if( e == EAGAIN || e == EINTR ) {
tr_peerIoSetEnabled( io, dir, TRUE );
return;
}
what |= EVBUFFER_ERROR;
}
tr_net_strerror( errstr, sizeof( errstr ), e );
dbgmsg( io, "event_read_cb got an error. res is %d, what is %hd, errno is %d (%s)", res, what, e, errstr );
if( io->gotError != NULL )
io->gotError( io, what, io->userData );
}
}