Update copyright years.

[libradsec.git] / lib / tcp.c

diff --git a/lib/tcp.c b/lib/tcp.c
index 3a59d6f..8ea6a5e 100644 (file)
--- a/lib/tcp.c
+++ b/lib/tcp.c
@@ -1,5 +1,5 @@
-/* Copyright 2011 NORDUnet A/S. All rights reserved.
-   See the file COPYING for licensing information.  */
+/* Copyright 2011-2013 NORDUnet A/S. All rights reserved.
+   See LICENSE for licensing information. */
 
 #if defined HAVE_CONFIG_H
 #include <config.h>
@@ -25,8 +25,7 @@
 #include <event2/buffer.h>
 #endif
 
-/* Read one RADIUS packet header.  Return !0 on error.  A return value
-   of 0 means that we need more data.  */
+/** Read one RADIUS packet header. Return !0 on error. */
 static int
 _read_header (struct rs_packet *pkt)
 {
@@ -35,7 +34,7 @@ _read_header (struct rs_packet *pkt)
   n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
   if (n == RS_HEADER_LEN)
     {
-      pkt->flags |= rs_packet_hdr_read_flag;
+      pkt->flags |= RS_PACKET_HEADER_READ;
       pkt->rpkt->length = (pkt->hdr[2] << 8) + pkt->hdr[3];
       if (pkt->rpkt->length < 20 || pkt->rpkt->length > RS_MAX_PACKET_LEN)
        {
@@ -64,6 +63,13 @@ _read_header (struct rs_packet *pkt)
   return 0;
 }
 
+/** Read a message, check that it's valid RADIUS and hand it off to
+    registered user callback.
+
+    The packet is read from the bufferevent associated with \a pkt and
+    the data is stored in \a pkt->rpkt.
+
+    Return 0 on success and !0 on failure. */
 static int
 _read_packet (struct rs_packet *pkt)
 {
@@ -83,7 +89,7 @@ _read_packet (struct rs_packet *pkt)
     {
       bufferevent_disable (pkt->conn->bev, EV_READ);
       rs_debug (("%s: complete packet read\n", __func__));
-      pkt->flags &= ~rs_packet_hdr_read_flag;
+      pkt->flags &= ~RS_PACKET_HEADER_READ;
       memset (pkt->hdr, 0, sizeof(*pkt->hdr));
 
       /* Checks done by rad_packet_ok:
@@ -141,9 +147,15 @@ tcp_read_cb (struct bufferevent *bev, void *user_data)
   assert (pkt->rpkt);
 
   pkt->rpkt->sockfd = pkt->conn->fd;
-  pkt->rpkt->vps = NULL;
+  pkt->rpkt->vps = NULL;        /* FIXME: can this be done when initializing pkt? */
+
+  /* Read a message header if not already read, return if that
+     fails. Read a message and have it dispatched to the user
+     registered callback.
 
-  if ((pkt->flags & rs_packet_hdr_read_flag) == 0)
+     Room for improvement: Peek inside buffer (evbuffer_copyout()) to
+     avoid the extra copying. */
+  if ((pkt->flags & RS_PACKET_HEADER_READ) == 0)
     if (_read_header (pkt))
       return;                  /* Error.  */
   _read_packet (pkt);
@@ -154,24 +166,32 @@ tcp_event_cb (struct bufferevent *bev, short events, void *user_data)
 {
   struct rs_packet *pkt = (struct rs_packet *) user_data;
   struct rs_connection *conn = NULL;
-  struct rs_peer *p = NULL;
   int sockerr = 0;
 #if defined (RS_ENABLE_TLS)
   unsigned long tlserr = 0;
 #endif
+#if defined (DEBUG)
+  struct rs_peer *p = NULL;
+#endif
 
   assert (pkt);
   assert (pkt->conn);
-  assert (pkt->conn->active_peer);
   conn = pkt->conn;
+#if defined (DEBUG)
+  assert (pkt->conn->active_peer);
   p = conn->active_peer;
+#endif
 
   conn->is_connecting = 0;
   if (events & BEV_EVENT_CONNECTED)
     {
       if (conn->tev)
        evtimer_del (conn->tev); /* Cancel connect timer.  */
-      event_on_connect (conn, pkt);
+      if (event_on_connect (conn, pkt))
+        {
+          event_on_disconnect (conn);
+          event_loopbreak (conn);
+        }
     }
   else if (events & BEV_EVENT_EOF)
     {
@@ -181,7 +201,7 @@ tcp_event_cb (struct bufferevent *bev, short events, void *user_data)
     {
       rs_debug (("%s: %p times out on %s\n", __func__, p,
                 (events & BEV_EVENT_READING) ? "read" : "write"));
-      rs_err_conn_push_fl (pkt->conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL);
+      rs_err_conn_push_fl (conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL);
     }
   else if (events & BEV_EVENT_ERROR)
     {
@@ -189,13 +209,13 @@ tcp_event_cb (struct bufferevent *bev, short events, void *user_data)
       if (sockerr == 0)        /* FIXME: True that errno == 0 means closed? */
        {
          event_on_disconnect (conn);
-         rs_err_conn_push_fl (pkt->conn, RSE_DISCO, __FILE__, __LINE__, NULL);
+         rs_err_conn_push_fl (conn, RSE_DISCO, __FILE__, __LINE__, NULL);
        }
       else
        {
          rs_debug (("%s: %d: %d (%s)\n", __func__, conn->fd, sockerr,
                     evutil_socket_error_to_string (sockerr)));
-         rs_err_conn_push_fl (pkt->conn, RSE_SOCKERR, __FILE__, __LINE__,
+         rs_err_conn_push_fl (conn, RSE_SOCKERR, __FILE__, __LINE__,
                               "%d: %d (%s)", conn->fd, sockerr,
                               evutil_socket_error_to_string (sockerr));
        }
@@ -208,7 +228,7 @@ tcp_event_cb (struct bufferevent *bev, short events, void *user_data)
            {
              rs_debug (("%s: openssl error: %s\n", __func__,
                         ERR_error_string (tlserr, NULL)));
-             rs_err_conn_push_fl (pkt->conn, RSE_SSLERR, __FILE__, __LINE__,
+             rs_err_conn_push_fl (conn, RSE_SSLERR, __FILE__, __LINE__,
                                   ERR_error_string (tlserr, NULL));
            }
        }