max_prodceeding

darcs-hash:20080227211149-16063-a3a6d7e9230aff0b9d194f796a390642ba7a2c05.gz

libsofia-sip-ua/nta/nta.c

@@ -345,7 +345,7 @@ su_log_t nta_log[] = { SU_LOG_INIT("nta", "NTA_DEBUG", SU_DEBUG) };
  * NTATAG_SIP_T1X64(), NTATAG_SIP_T1(), NTATAG_SIP_T2(), NTATAG_SIP_T4(),
  * NTATAG_STATELESS(),
  * NTATAG_TAG_3261(), NTATAG_TCP_RPORT(), NTATAG_TIMEOUT_408(),
- * NTATAG_TIMER_C(),
+ * NTATAG_TIMER_C(), NTATAG_MAX_PROCEEDING(),
  * NTATAG_UA(), NTATAG_UDP_MTU(), NTATAG_USER_VIA(),
  * NTATAG_USE_NAPTR(), NTATAG_USE_SRV() and NTATAG_USE_TIMESTAMP().
  *
@@ -884,7 +884,7 @@ void agent_kill_terminator(nta_agent_t *agent)
  * INVITE transactions, or how the @Via headers are generated.
  *
  * @note 
- * Setting the parameters NTATAG_MAXSIZE(), NTATAG_UDP_MTU(),
+ * Setting the parameters NTATAG_MAXSIZE(), NTATAG_UDP_MTU(), NTATAG_MAX_PROCEEDING(),
  * NTATAG_SIP_T1X64(), NTATAG_SIP_T1(), NTATAG_SIP_T2(), NTATAG_SIP_T4() to
  * 0 selects the default value.
  *
@@ -902,7 +902,7 @@ void agent_kill_terminator(nta_agent_t *agent)
  * NTATAG_SIP_T1X64(), NTATAG_SIP_T1(), NTATAG_SIP_T2(), NTATAG_SIP_T4(),
  * NTATAG_STATELESS(),
  * NTATAG_TAG_3261(), NTATAG_TCP_RPORT(), NTATAG_TIMEOUT_408(),
- * NTATAG_TIMER_C(),
+ * NTATAG_TIMER_C(), NTATAG_MAX_PROCEEDING(),
  * NTATAG_UA(), NTATAG_UDP_MTU(), NTATAG_USER_VIA(),
  * NTATAG_USE_NAPTR(), NTATAG_USE_SRV() and NTATAG_USE_TIMESTAMP().
  *
@@ -935,6 +935,7 @@ int agent_set_params(nta_agent_t *agent, tagi_t *tags)
   unsigned bad_req_mask = agent->sa_bad_req_mask;
   unsigned bad_resp_mask = agent->sa_bad_resp_mask;
   usize_t  maxsize    = agent->sa_maxsize;
+  usize_t  max_proceeding = agent->sa_max_proceeding;
   unsigned max_forwards = agent->sa_max_forwards->mf_count;
   unsigned udp_mtu    = agent->sa_udp_mtu;
   unsigned sip_t1     = agent->sa_t1;
@@ -988,6 +989,7 @@ int agent_set_params(nta_agent_t *agent, tagi_t *tags)
 	      NTATAG_EXTRA_100_REF(extra_100),
 	      NTATAG_GRAYLIST_REF(graylist),
 	      NTATAG_MAXSIZE_REF(maxsize),
+	      NTATAG_MAX_PROCEEDING_REF(max_proceeding),
 	      NTATAG_MAX_FORWARDS_REF(max_forwards),
 	      NTATAG_MCLASS_REF(mclass),
 	      NTATAG_MERGE_482_REF(merge_482),
@@ -1092,6 +1094,9 @@ int agent_set_params(nta_agent_t *agent, tagi_t *tags)
   if (maxsize > NTA_TIME_MAX) maxsize = NTA_TIME_MAX;
   agent->sa_maxsize = maxsize;
 
+  if (max_proceeding == 0) max_proceeding = SIZE_MAX;
+  agent->sa_max_proceeding = max_proceeding;
+
   if (max_forwards == 0) max_forwards = 70; /* Default value */
   agent->sa_max_forwards->mf_count = max_forwards;
 
@@ -1206,7 +1211,7 @@ void agent_set_udp_params(nta_agent_t *self, usize_t udp_mtu)
  * NTATAG_DEBUG_DROP_PROB_REF(), NTATAG_DEFAULT_PROXY_REF(),
  * NTATAG_EXTRA_100_REF(), NTATAG_GRAYLIST_REF(),
  * NTATAG_MAXSIZE_REF(), NTATAG_MAX_FORWARDS_REF(), NTATAG_MCLASS_REF(),
- * NTATAG_MERGE_482_REF(), 
+ * NTATAG_MERGE_482_REF(), NTATAG_MAX_PROCEEDING_REF(),
  * NTATAG_PASS_100_REF(), NTATAG_PASS_408_REF(), NTATAG_PRELOAD_REF(),
  * NTATAG_PROGRESS_REF(),
  * NTATAG_REL100_REF(), 
@@ -1255,6 +1260,7 @@ int agent_get_params(nta_agent_t *agent, tagi_t *tags)
 	     NTATAG_EXTRA_100(agent->sa_extra_100),
 	     NTATAG_GRAYLIST(agent->sa_graylist),
 	     NTATAG_MAXSIZE(agent->sa_maxsize),
+		 NTATAG_MAX_PROCEEDING(agent->sa_max_proceeding),
 	     NTATAG_MAX_FORWARDS(agent->sa_max_forwards->mf_count),
 	     NTATAG_MCLASS(agent->sa_mclass),
 	     NTATAG_MERGE_482(agent->sa_merge_482),
@@ -2432,9 +2438,16 @@ void agent_recv_request(nta_agent_t *agent,
     leg_recv(leg, msg, sip, tport);
   }
   else if (!agent->sa_is_stateless && (leg = agent->sa_default_leg)) {
-    SU_DEBUG_5(("nta: %s (%u) %s\n",
-		method_name, cseq, "going to a default leg"));
-    leg_recv(leg, msg, sip, tport);
+	if (method == sip_method_invite && agent->sa_in.proceeding->q_length >= agent->sa_max_proceeding) {
+		SU_DEBUG_5(("nta: proceeding queue full for %s (%u)\n", method_name, cseq));
+		nta_msg_treply(agent, msg, SIP_503_SERVICE_UNAVAILABLE,
+			   NTATAG_TPORT(tport), 
+			   TAG_END());
+		return;
+	} else {
+		SU_DEBUG_5(("nta: %s (%u) %s\n", method_name, cseq, "going to a default leg"));
+		leg_recv(leg, msg, sip, tport);
+	}
   }
   else if (agent->sa_callback) {
     /* Stateless processing for request */

libsofia-sip-ua/nta/nta_internal.h

@@ -145,6 +145,9 @@ struct nta_agent_s
   /** Maximum size of incoming messages */
   size_t                sa_maxsize;
   
+  /** Maximum size of proceeding queue */
+  size_t                sa_max_proceeding;
+  
   /** Maximum size of outgoing UDP requests */
   unsigned              sa_udp_mtu;
 

libsofia-sip-ua/nta/nta_tag.c

@@ -400,6 +400,27 @@ tag_typedef_t ntatag_remote_cseq = UINTTAG_TYPEDEF(remote_cseq);
  */
 tag_typedef_t ntatag_maxsize = USIZETAG_TYPEDEF(maxsize);
 
+/**@def NTATAG_MAX_PROCEEDING(x)
+ *
+ * Maximum size of proceeding queue. 
+ *
+ * If the size of the proceedng message queue would exceed the
+ * given limit, the stack will automatically respond with <i>503 
+ * Service Unavailable</i>.
+ *
+ * @par Used with
+ *    nua_create(), nua_set_params(),
+ *    nta_agent_create(), nta_agent_set_params()
+ *
+ * @par Parameter type
+ *    - #usize_t 
+ *
+ * @par Values
+ *    - Maximum acceptable size of a queue (size_t).
+ *
+ */
+tag_typedef_t ntatag_max_proceeding = USIZETAG_TYPEDEF(max_proceeding);
+
 /**@def NTATAG_UDP_MTU(x)
  *
  * Maximum size of outgoing UDP request. 

libsofia-sip-ua/nta/sofia-sip/nta_tag.h

@@ -155,6 +155,12 @@ NTA_DLL extern tag_typedef_t ntatag_udp_mtu;
 NTA_DLL extern tag_typedef_t ntatag_udp_mtu_ref;
 #define NTATAG_UDP_MTU_REF(x) ntatag_udp_mtu_ref, tag_uint_vr(&(x))
 
+NTA_DLL extern tag_typedef_t ntatag_max_proceeding;
+#define NTATAG_MAX_PROCEEDING(x) ntatag_max_proceeding, tag_usize_v((x))
+
+NTA_DLL extern tag_typedef_t ntatag_max_proceeding_ref;
+#define NTATAG_MAX_PROCEEDING_REF(x) ntatag_max_proceeding_ref, tag_usize_vr(&(x))
+
 NTA_DLL extern tag_typedef_t ntatag_max_forwards;
 #define NTATAG_MAX_FORWARDS(x) ntatag_max_forwards, tag_uint_v((x))
 

libsofia-sip-ua/nua/nua_params.c

@@ -1535,6 +1535,7 @@ int nua_stack_get_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
 
   /* nta */
   unsigned udp_mtu = 0;
+  usize_t max_proceeding = 0;
   unsigned sip_t1 = 0, sip_t2 = 0, sip_t4 = 0, sip_t1x64 = 0;
   unsigned debug_drop_prob = 0;
   url_string_t const *proxy = NULL;
@@ -1550,6 +1551,7 @@ int nua_stack_get_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
 
   nta_agent_get_params(nua->nua_nta,
 		       NTATAG_UDP_MTU_REF(udp_mtu),
+		       NTATAG_MAX_PROCEEDING_REF(max_proceeding),
 		       NTATAG_SIP_T1_REF(sip_t1),
 		       NTATAG_SIP_T2_REF(sip_t2),
 		       NTATAG_SIP_T4_REF(sip_t4),
@@ -1691,6 +1693,7 @@ int nua_stack_get_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
 #endif
 
      NTATAG_UDP_MTU(udp_mtu),
+	 NTATAG_MAX_PROCEEDING(max_proceeding),
      NTATAG_SIP_T1(sip_t1),
      NTATAG_SIP_T2(sip_t2),
      NTATAG_SIP_T4(sip_t4),

libsofia-sip-ua/su/sofia-sip/su_tag.h

@@ -216,6 +216,8 @@ su_inline tag_value_t tag_filter_v(tag_filter_f *v) {return(tag_value_t)v;}
 #define tag_uint_vr(v) (tag_value_t)(v)
 #define tag_usize_v(v) (tag_value_t)(v)
 #define tag_usize_vr(v) (tag_value_t)(v)
+#define tag_size_v(v) (tag_value_t)(v)
+#define tag_size_vr(v) (tag_value_t)(v)
 #define tag_bool_v(v)  (tag_value_t)(v != 0)
 #define tag_bool_vr(v) (tag_value_t)(v)
 #define tag_ptr_v(v)   (tag_value_t)(v)