diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
index 686ac8e4bd..5e5fa2ca9e 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
@@ -346,7 +346,7 @@ 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().
*
@@ -864,7 +864,7 @@ 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.
*
@@ -882,7 +882,7 @@ 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().
*
@@ -915,6 +915,7 @@ 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;
@@ -966,6 +967,7 @@ int agent_set_params(nta_agent_t *agent, tagi_t *tags)
NTATAG_DEFAULT_PROXY_REF(proxy),
NTATAG_EXTRA_100_REF(extra_100),
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),
@@ -1070,6 +1072,9 @@ 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;
@@ -1178,7 +1183,7 @@ 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_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(),
@@ -1226,6 +1231,7 @@ int agent_get_params(nta_agent_t *agent, tagi_t *tags)
NTATAG_DEFAULT_PROXY(agent->sa_default_proxy),
NTATAG_EXTRA_100(agent->sa_extra_100),
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),
@@ -2390,9 +2396,16 @@ 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_486_BUSY_HERE,
+ 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 */
diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/nta_internal.h b/libs/sofia-sip/libsofia-sip-ua/nta/nta_internal.h
index 69b8c46a56..613c5313fc 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/nta_internal.h
+++ b/libs/sofia-sip/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;
diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/nta_tag.c b/libs/sofia-sip/libsofia-sip-ua/nta/nta_tag.c
index 7da5f74600..91ee4b9455 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/nta_tag.c
+++ b/libs/sofia-sip/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>486
+ * Server Busy</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.
diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/sofia-sip/nta_tag.h b/libs/sofia-sip/libsofia-sip-ua/nta/sofia-sip/nta_tag.h
index 4b2ae32854..82e4b1c969 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/sofia-sip/nta_tag.h
+++ b/libs/sofia-sip/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))
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c b/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
index beec60976a..34dd314488 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
@@ -1526,6 +1526,7 @@ int nua_stack_get_params(nua_t *nua, nua_handle_t *nh, nua_event_t e,
/* nta */
usize_t 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;
@@ -1543,6 +1544,7 @@ 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),
@@ -1674,6 +1676,7 @@ 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),
diff --git a/libs/sofia-sip/libsofia-sip-ua/su/sofia-sip/su_tag.h b/libs/sofia-sip/libsofia-sip-ua/su/sofia-sip/su_tag.h
index dd47eacb11..c95748bd19 100644
--- a/libs/sofia-sip/libsofia-sip-ua/su/sofia-sip/su_tag.h
+++ b/libs/sofia-sip/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)