struct evconnlistener *init_socket_activated(void) {
evutil_socket_t fd = SD_LISTEN_FDS_START + 0;
evutil_make_socket_nonblocking(fd);
return evconnlistener_new(base, cb_new_connection,
NULL, 0, 0 /* Set to 0 if the socket is already listening*/, fd);
}
static void
regress_listener_error(void *arg)
{
struct basic_test_data *data = arg;
struct event_base *base = data->base;
struct evconnlistener *listener = NULL;
int count = 1;
unsigned int flags = LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE;
if (data->setup_data && strstr((char*)data->setup_data, "ts")) {
flags |= LEV_OPT_THREADSAFE;
}
/* send, so that pair[0] will look 'readable'*/
tt_int_op(send(data->pair[1], "hello", 5, 0), >, 0);
/* Start a listener with a bogus socket. */
listener = evconnlistener_new(base, acceptcb, &count,
flags, 0,
data->pair[0]);
tt_assert(listener);
evconnlistener_set_error_cb(listener, errorcb);
tt_assert(listener);
event_base_dispatch(base);
tt_int_op(count,==,1000); /* set by error cb */
end:
if (listener)
evconnlistener_free(listener);
}
static int create_server_listener(tls_listener_relay_server_type* server) {
FUNCSTART;
if(!server) return -1;
evutil_socket_t tls_listen_fd = -1;
tls_listen_fd = socket(server->addr.ss.ss_family, SOCK_STREAM, 0);
if (tls_listen_fd < 0) {
perror("socket");
return -1;
}
if(sock_bind_to_device(tls_listen_fd, (unsigned char*)server->ifname)<0) {
TURN_LOG_FUNC(TURN_LOG_LEVEL_INFO,"Cannot bind listener socket to device %s\n",server->ifname);
}
if(addr_bind(tls_listen_fd,&server->addr)<0) {
perror("Cannot bind local socket to addr");
char saddr[129];
addr_to_string(&server->addr,(u08bits*)saddr);
TURN_LOG_FUNC(TURN_LOG_LEVEL_INFO,"Cannot bind TCP/TLS listener socket to addr %s\n",saddr);
socket_closesocket(tls_listen_fd);
return -1;
}
socket_tcp_set_keepalive(tls_listen_fd);
socket_set_nonblocking(tls_listen_fd);
server->l = evconnlistener_new(server->e->event_base,
server_input_handler, server,
LEV_OPT_CLOSE_ON_FREE | LEV_OPT_REUSEABLE,
1024, tls_listen_fd);
if(!(server->l)) {
TURN_LOG_FUNC(TURN_LOG_LEVEL_INFO,"Cannot create TLS listener\n");
socket_closesocket(tls_listen_fd);
return -1;
}
if(addr_get_from_sock(tls_listen_fd, &(server->addr))) {
perror("Cannot get local socket addr");
socket_closesocket(tls_listen_fd);
return -1;
}
if(!no_tcp && !no_tls)
addr_debug_print(server->verbose, &server->addr,"TCP/TLS listener opened on ");
else if(!no_tls)
addr_debug_print(server->verbose, &server->addr,"TLS listener opened on ");
else if(!no_tcp)
addr_debug_print(server->verbose, &server->addr,"TCP listener opened on ");
FUNCEND;
return 0;
}
struct evconnlistener *
evconnlistener_new_bind(struct event_base *base, evconnlistener_cb cb,
void *ptr, unsigned flags, int backlog, const struct sockaddr *sa,
int socklen)
{
struct evconnlistener *listener;
evutil_socket_t fd;
int on = 1;
int family = sa ? sa->sa_family : AF_UNSPEC;
if (backlog == 0)
return NULL;
fd = socket(family, SOCK_STREAM, 0);
if (fd == -1)
return NULL;
if (evutil_make_socket_nonblocking(fd) < 0) {
evutil_closesocket(fd);
return NULL;
}
if (flags & LEV_OPT_CLOSE_ON_EXEC) {
if (evutil_make_socket_closeonexec(fd) < 0) {
evutil_closesocket(fd);
return NULL;
}
}
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void*)&on, sizeof(on))<0) {
evutil_closesocket(fd);
return NULL;
}
if (flags & LEV_OPT_REUSEABLE) {
if (evutil_make_listen_socket_reuseable(fd) < 0) {
evutil_closesocket(fd);
return NULL;
}
}
if (sa) {
if (bind(fd, sa, socklen)<0) {
evutil_closesocket(fd);
return NULL;
}
}
listener = evconnlistener_new(base, cb, ptr, flags, backlog, fd);
if (!listener) {
evutil_closesocket(fd);
return NULL;
}
return listener;
}
struct evconnlistener *
evconnlistener_new_bind(struct event_base *base, evconnlistener_cb cb,
void *ptr, unsigned flags, int backlog, const struct sockaddr *sa,
int socklen)
{
struct evconnlistener *listener;
evutil_socket_t fd;
int on = 1;
int family = sa ? sa->sa_family : AF_UNSPEC;
int socktype = SOCK_STREAM | EVUTIL_SOCK_NONBLOCK;
if (backlog == 0)
return NULL;
if (flags & LEV_OPT_CLOSE_ON_EXEC)
socktype |= EVUTIL_SOCK_CLOEXEC;
fd = evutil_socket_(family, socktype, 0);
if (fd == -1)
return NULL;
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void*)&on, sizeof(on))<0)
goto err;
if (flags & LEV_OPT_REUSEABLE) {
if (evutil_make_listen_socket_reuseable(fd) < 0)
goto err;
}
if (flags & LEV_OPT_REUSEABLE_PORT) {
if (evutil_make_listen_socket_reuseable_port(fd) < 0)
goto err;
}
if (flags & LEV_OPT_DEFERRED_ACCEPT) {
if (evutil_make_tcp_listen_socket_deferred(fd) < 0)
goto err;
}
if (sa) {
if (bind(fd, sa, socklen)<0)
goto err;
}
listener = evconnlistener_new(base, cb, ptr, flags, backlog, fd);
if (!listener)
goto err;
return listener;
err:
evutil_closesocket(fd);
return NULL;
}
struct evwsconnlistener *evwsconnlistener_new(struct event_base *base,
evwsconnlistener_cb cb, void *user_data, unsigned flags, int backlog,
const char* subprotocols[], SSL_CTX* server_ctx, evutil_socket_t fd) {
struct evwsconnlistener *levws =
(struct evwsconnlistener *)malloc(sizeof(struct evwsconnlistener));
if (!levws)
return NULL;
levws->lev = evconnlistener_new(base, lev_cb, levws, flags, backlog, fd);
if (!levws->lev) {
free(levws);
return NULL;
}
levws->cb = cb;
levws->errorcb = NULL;
levws->user_data = user_data;
levws->supported_subprotocols = subprotocols;
levws->server_ctx = server_ctx;
levws->head = NULL;
return levws;
}
bool cServerHandleImpl::Listen(UInt16 a_Port)
{
// Make sure the cNetwork internals are innitialized:
cNetworkSingleton::Get();
// Set up the main socket:
// It should listen on IPv6 with IPv4 fallback, when available; IPv4 when IPv6 is not available.
bool NeedsTwoSockets = false;
int err;
evutil_socket_t MainSock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (!IsValidSocket(MainSock))
{
// Failed to create IPv6 socket, create an IPv4 one instead:
err = EVUTIL_SOCKET_ERROR();
LOGD("Failed to create IPv6 MainSock: %d (%s)", err, evutil_socket_error_to_string(err));
MainSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (!IsValidSocket(MainSock))
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Cannot create socket for port %d: %s", a_Port, evutil_socket_error_to_string(m_ErrorCode));
return false;
}
// Allow the port to be reused right after the socket closes:
if (evutil_make_listen_socket_reuseable(MainSock) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Port %d cannot be made reusable: %d (%s). Restarting the server might not work.",
a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode)
);
LOG("%s", m_ErrorMsg.c_str());
}
// Bind to all interfaces:
sockaddr_in name;
memset(&name, 0, sizeof(name));
name.sin_family = AF_INET;
name.sin_port = ntohs(a_Port);
if (bind(MainSock, reinterpret_cast<const sockaddr *>(&name), sizeof(name)) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Cannot bind IPv4 socket to port %d: %s", a_Port, evutil_socket_error_to_string(m_ErrorCode));
evutil_closesocket(MainSock);
return false;
}
}
else
{
// IPv6 socket created, switch it into "dualstack" mode:
UInt32 Zero = 0;
#ifdef _WIN32
// WinXP doesn't support this feature, so if the setting fails, create another socket later on:
int res = setsockopt(MainSock, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char *>(&Zero), sizeof(Zero));
err = EVUTIL_SOCKET_ERROR();
NeedsTwoSockets = ((res == SOCKET_ERROR) && (err == WSAENOPROTOOPT));
#else
setsockopt(MainSock, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char *>(&Zero), sizeof(Zero));
#endif
// Allow the port to be reused right after the socket closes:
if (evutil_make_listen_socket_reuseable(MainSock) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Port %d cannot be made reusable: %d (%s). Restarting the server might not work.",
a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode)
);
LOG("%s", m_ErrorMsg.c_str());
}
// Bind to all interfaces:
sockaddr_in6 name;
memset(&name, 0, sizeof(name));
name.sin6_family = AF_INET6;
name.sin6_port = ntohs(a_Port);
if (bind(MainSock, reinterpret_cast<const sockaddr *>(&name), sizeof(name)) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Cannot bind IPv6 socket to port %d: %d (%s)", a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode));
evutil_closesocket(MainSock);
return false;
}
}
if (evutil_make_socket_nonblocking(MainSock) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Cannot make socket on port %d non-blocking: %d (%s)", a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode));
evutil_closesocket(MainSock);
return false;
}
if (listen(MainSock, 0) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Cannot listen on port %d: %d (%s)", a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode));
evutil_closesocket(MainSock);
return false;
}
m_ConnListener = evconnlistener_new(cNetworkSingleton::Get().GetEventBase(), Callback, this, LEV_OPT_CLOSE_ON_FREE | LEV_OPT_REUSEABLE, 0, MainSock);
m_IsListening = true;
if (!NeedsTwoSockets)
{
return true;
}
// If a secondary socket is required (WinXP dual-stack), create it here:
LOGD("Creating a second socket for IPv4");
evutil_socket_t SecondSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (!IsValidSocket(SecondSock))
{
err = EVUTIL_SOCKET_ERROR();
LOGD("socket(AF_INET, ...) failed for secondary socket: %d, %s", err, evutil_socket_error_to_string(err));
return true; // Report as success, the primary socket is working
}
// Allow the port to be reused right after the socket closes:
if (evutil_make_listen_socket_reuseable(SecondSock) != 0)
{
m_ErrorCode = EVUTIL_SOCKET_ERROR();
Printf(m_ErrorMsg, "Port %d cannot be made reusable (second socket): %d (%s). Restarting the server might not work.",
a_Port, m_ErrorCode, evutil_socket_error_to_string(m_ErrorCode)
);
LOG("%s", m_ErrorMsg.c_str());
}
// Make the secondary socket nonblocking:
if (evutil_make_socket_nonblocking(SecondSock) != 0)
{
err = EVUTIL_SOCKET_ERROR();
LOGD("evutil_make_socket_nonblocking() failed for secondary socket: %d, %s", err, evutil_socket_error_to_string(err));
evutil_closesocket(SecondSock);
return true; // Report as success, the primary socket is working
}
// Bind to all IPv4 interfaces:
sockaddr_in name;
memset(&name, 0, sizeof(name));
name.sin_family = AF_INET;
name.sin_port = ntohs(a_Port);
if (bind(SecondSock, reinterpret_cast<const sockaddr *>(&name), sizeof(name)) != 0)
{
err = EVUTIL_SOCKET_ERROR();
LOGD("Cannot bind secondary socket to port %d: %d (%s)", a_Port, err, evutil_socket_error_to_string(err));
evutil_closesocket(SecondSock);
return true; // Report as success, the primary socket is working
}
if (listen(SecondSock, 0) != 0)
{
err = EVUTIL_SOCKET_ERROR();
LOGD("Cannot listen on secondary socket on port %d: %d (%s)", a_Port, err, evutil_socket_error_to_string(err));
evutil_closesocket(SecondSock);
return true; // Report as success, the primary socket is working
}
m_SecondaryConnListener = evconnlistener_new(cNetworkSingleton::Get().GetEventBase(), Callback, this, LEV_OPT_CLOSE_ON_FREE | LEV_OPT_REUSEABLE, 0, SecondSock);
return true;
}
int main(int argc, char *argv[]) {
struct event_base *base;
struct evconnlistener *listener;
struct sockaddr_in sin;
base = event_base_new();
if (!base) {
fprintf(stderr, "Could not initialize libevent!\n");
return 1;
}
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
// create server socket manually
// to make this code works with other frameworks which
// we don't open socket by ourselves.
int reuseaddr_on = 1;
int server_socket;
server_socket = socket(AF_INET, SOCK_STREAM , 0);
if (server_socket < 0) {
fprintf(stderr, "Could not open socket!\n");
return 1;
}
if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR | SO_KEEPALIVE, &reuseaddr_on,
sizeof(reuseaddr_on)) < 0) {
fprintf(stderr, "setsockopt failed");
goto err;
}
if (evutil_make_socket_nonblocking(server_socket) < 0) {
fprintf(stderr, "set nonblocking failed");
goto err;
}
if (bind(server_socket, (struct sockaddr *)&sin,
sizeof(sin)) < 0) {
fprintf(stderr, "bind failed\n");
goto err;
}
// add libevent connection listener
listener = evconnlistener_new(base, listener_cb, (void *)base,
LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_FREE, -1,
server_socket);
if (!listener) {
fprintf(stderr, "Could not create a listener!\n");
goto err;
}
// signal_event = evsignal_new(base, SIGINT, signal_cb, (void *)base);
// if (!signal_event || event_add(signal_event, NULL)<0) {
// fprintf(stderr, "Could not create/add a signal event!\n");
// return 1;
// }
event_base_dispatch(base);
evconnlistener_free(listener);
// event_free(signal_event);
event_base_free(base);
printf("done\n");
return 0;
err:
evutil_closesocket(server_socket);
return 1;
}
