Some work on integrating OpenSSL.

GNUmakefile

@@ -9,7 +9,7 @@ MV            := mv
 RANLIB        := ranlib
 CFLAGS        += -pipe -Wall
 USE_PCH       ?= YES
-USE_SSL       ?= NO
+USE_SSL       ?= YES
 USE_BIGENDIAN ?= AUTO
 BITS          ?= AUTO
 SILENT        ?= YES

src/core/hubio.c

@@ -178,7 +178,7 @@ int hub_sendq_send(struct hub_sendq* q, hub_recvq_write w, void* data)
 	if (ret > 0)
 	{
 #ifdef SSL_SUPPORT
-		q->last_write_n = ret;
+		q->last_send = ret;
 #endif
 
 		/* Remove messages sent */

src/core/netevent.c

@@ -75,7 +75,7 @@ int net_user_send(void* ptr, const void* buf, size_t len)
 	return ret;
 }
 
-#ifdef SSL_SUPPORT
+#if 0
 int net_user_send_ssl(void* ptr, const void* buf, size_t len)
 {
 	struct hub_user* user = (struct hub_user*) ptr;
@@ -114,8 +114,7 @@ int net_user_recv(void* ptr, void* buf, size_t len)
 	return ret;
 }
 
-
-#ifdef SSL_SUPPORT
+#if 0
 int net_user_recv_ssl(void* ptr, void* buf, size_t len)
 {
 	struct hub_user* user = (struct hub_user*) ptr;

src/network/connection.c

@@ -21,12 +21,85 @@
 
 extern struct hub_info* g_hub;
 
+#ifdef SSL_SUPPORT
+static ssize_t net_con_ssl_accept(struct net_connection* con);
+static ssize_t net_con_ssl_connect(struct net_connection* con);
+#endif
+
+static inline int net_con_flag_get(struct net_connection* con, unsigned int flag)
+{
+    return con->flags & flag;
+}
+
+static inline void net_con_flag_set(struct net_connection* con, unsigned int flag)
+{
+    con->flags |= flag;
+}
+
+static inline void net_con_flag_unset(struct net_connection* con, unsigned int flag)
+{
+    con->flags &= ~flag;
+}
+
+static void net_con_event(int fd, short ev, void *arg)
+{
+	struct net_connection* con = (struct net_connection*) arg;
+#ifdef SSL_SUPPORT
+	if (!con->ssl)
+	{
+#endif
+		net_event(fd, ev, con->ptr);
+#ifdef SSL_SUPPORT
+	}
+	else
+	{
+		if (ev & (EV_READ | EV_WRITE))
+		{
+			if (net_con_flag_get(con, NET_WANT_SSL_ACCEPT))
+			{
+				net_con_ssl_accept(con);
+			}
+			else if (net_con_flag_get(con, NET_WANT_SSL_CONNECT))
+			{
+				net_con_ssl_connect(con);
+			}
+			else if (ev == EV_READ && net_con_flag_get(con, NET_WANT_SSL_READ))
+			{
+				net_event(fd, EV_WRITE, con->ptr);
+			}
+			else if (ev == EV_WRITE && net_con_flag_get(con, NET_WANT_SSL_WRITE))
+			{
+				net_event(fd, ev & EV_READ, con->ptr);
+			}
+			else
+			{
+				net_event(fd, ev, con->ptr);
+			}
+		}
+		else
+		{
+			net_event(fd, ev, con->ptr);
+		}
+	}
+#endif
+}
+
 void net_con_initialize(struct net_connection* con, int sd, const void* ptr, int events)
 {
 	con->sd = sd;
 	con->ptr = (void*) ptr;
+	con->last_send = time(0);
+	con->last_recv = con->last_send;
 
-	event_set(&con->event, con->sd, events | EV_PERSIST, net_event, con->ptr);
+#ifdef SSL_SUPPORT
+	con->ssl = NULL;
+	con->write_len = 0;
+#endif
+
+	if (events & EV_READ)  net_con_flag_set(con, NET_WANT_READ);
+	if (events & EV_WRITE) net_con_flag_set(con, NET_WANT_WRITE);
+
+	event_set(&con->event, con->sd, events | EV_PERSIST, net_con_event, con);
 	event_base_set(g_hub->evbase, &con->event);
 	event_add(&con->event, 0);
 }
@@ -36,8 +109,11 @@ void net_con_update(struct net_connection* con, int events)
 	if (event_pending(&con->event, EV_READ | EV_WRITE, 0) == events)
 		return;
 
+	if (events & EV_READ)  net_con_flag_set(con, NET_WANT_READ);
+	if (events & EV_WRITE) net_con_flag_set(con, NET_WANT_WRITE);
+
 	event_del(&con->event);
-	event_set(&con->event, con->sd, events | EV_PERSIST, net_event, con->ptr);
+	event_set(&con->event, con->sd, events | EV_PERSIST, net_con_event, con);
 	event_add(&con->event, 0);
 }
 
@@ -50,3 +126,159 @@ void net_con_close(struct net_connection* con)
 	con->sd = -1;
 }
 
+#ifdef SSL_SUPPORT
+static int handle_openssl_error(struct net_connection* con, int ret)
+{
+	int error = SSL_get_error(con->ssl, ret);
+	switch (error)
+	{
+		case SSL_ERROR_ZERO_RETURN:
+			return ret;
+
+		case SSL_ERROR_WANT_READ:
+			net_con_update(con, EV_READ);
+			net_con_flag_set(con, NET_WANT_SSL_READ);
+			return 0;
+
+		case SSL_ERROR_WANT_WRITE:
+			net_con_update(con, EV_READ | EV_WRITE);
+			net_con_flag_set(con, NET_WANT_SSL_WRITE);
+			return 0;
+
+		case SSL_ERROR_WANT_CONNECT:
+			net_con_update(con, EV_READ | EV_WRITE);
+			net_con_flag_set(con, NET_WANT_SSL_CONNECT);
+			return 0;
+
+		case SSL_ERROR_WANT_ACCEPT:
+			net_con_update(con, EV_READ | EV_WRITE);
+			net_con_flag_set(con, NET_WANT_SSL_ACCEPT);
+			return 0;
+
+		case SSL_ERROR_WANT_X509_LOOKUP:
+			return 0;
+
+		case SSL_ERROR_SYSCALL:
+			/* if ret == 0, connection closed, if ret == -1, check with errno */
+			return -1;
+
+		case SSL_ERROR_SSL:
+			/* internal openssl error */
+			return -1;
+	}
+
+	return -1;
+}
+#endif
+
+
+ssize_t net_con_send(struct net_connection* con, const void* buf, size_t len)
+{
+#ifdef SSL_SUPPORT
+	if (!con->ssl)
+	{
+#endif
+		int ret = net_send(con->sd, buf, len, UHUB_SEND_SIGNAL);
+		if (ret > 0)
+		{
+			con->last_send = time(0);
+		}
+		else if (ret == -1 && (net_error() == EWOULDBLOCK || net_error() == EINTR))
+		{
+			return 0;
+		}
+		else
+		{
+			return -1;
+		}
+		return ret;
+#ifdef SSL_SUPPORT
+	}
+	else
+	{
+		int ret = SSL_write(con->ssl, buf, len);
+		if (ret > 0)
+		{
+			con->last_send = time(0);
+			net_con_flag_unset(con, NET_WANT_SSL_READ);
+		}
+		else
+		{
+			return handle_openssl_error(con, ret);
+		}
+		return ret;
+	}
+#endif
+
+
+}
+
+ssize_t net_con_recv(struct net_connection* con, void* buf, size_t len)
+{
+#ifdef SSL_SUPPORT
+	if (!con->ssl)
+	{
+#endif
+		int ret = net_recv(con->sd, buf, len, 0);
+		if (ret > 0)
+		{
+			con->last_recv = time(0);
+		}
+		else if (ret == -1 && (net_error() == EWOULDBLOCK || net_error() == EINTR))
+		{
+			return 0;
+		}
+		else
+		{
+			return -1;
+		}
+		return ret;
+#ifdef SSL_SUPPORT
+	}
+	else
+	{
+		int ret = SSL_read(con->ssl, buf, len);
+		if (ret > 0)
+		{
+			con->last_recv = time(0);
+			net_con_flag_unset(con, NET_WANT_SSL_WRITE);
+		}
+		else
+		{
+			return handle_openssl_error(con, ret);
+		}
+		return ret;
+	}
+#endif
+}
+
+#ifdef SSL_SUPPORT
+static ssize_t net_con_ssl_accept(struct net_connection* con)
+{
+	ssize_t ret = SSL_accept(con->ssl);
+	if (ret > 0)
+	{
+		net_con_flag_unset(con, NET_WANT_SSL_ACCEPT);
+	}
+	else
+	{
+		return handle_openssl_error(con, ret);
+	}
+	return ret;
+}
+
+static ssize_t net_con_ssl_connect(struct net_connection* con)
+{
+	ssize_t ret = SSL_connect(con->ssl);
+	if (ret > 0)
+	{
+		net_con_flag_unset(con, NET_WANT_SSL_CONNECT);
+	}
+	else
+	{
+		return handle_openssl_error(con, ret);
+	}
+	return ret;
+}
+#endif
+

src/network/connection.h

@@ -25,10 +25,14 @@
 struct net_connection
 {
 	int                  sd;        /** socket descriptor */
+	unsigned int         flags;     /** Connection flags */
 	void*                ptr;       /** data pointer */
 	struct event         event;     /** libevent struct for read/write events */
+	time_t               last_recv; /** Timestamp for last recv() */
+	time_t               last_send; /** Timestamp for last send() */
 #ifdef SSL_SUPPORT
 	SSL*                 ssl;       /** SSL handle */
+	size_t               write_len; /** Length of last SSL_write(), only used if flags is NET_WANT_SSL_READ. */
 #endif /*  SSL_SUPPORT */
 };
 
@@ -36,6 +40,23 @@ extern void net_con_initialize(struct net_connection* con, int sd, const void* p
 extern void net_con_update(struct net_connection* con, int events);
 extern void net_con_close(struct net_connection* con);
 
+/**
+ * Send data
+ *
+ * @return returns the number of bytes sent.
+ *         0 if no data is sent, and this function should be called again
+ *        -1 if an error occured, and the socket should be considered dead or closed.
+ */
+extern ssize_t net_con_send(struct net_connection* con, const void* buf, size_t len);
+
+/**
+ * Receive data
+ *
+ * @return returns the number of bytes sent.
+ *         0 if no data is sent, and this function should be called again
+ *        -1 if an error occured, and the socket should be considered dead or closed.
+ */
+extern ssize_t net_con_recv(struct net_connection* con, void* buf, size_t len);
 
 #endif /* HAVE_UHUB_NETWORK_CONNECTION_H */