modules/registrar: add Require: outbound to 200 OK when required by client and supported by server

- Reported by @oej

modules/registrar/reply.c

@@ -39,6 +39,7 @@
 #include "../../ut.h"
 #include "../../xavp.h"
 #include "../../parser/msg_parser.h"
+#include "../../lib/kcore/parse_require.h"
 #include "../../lib/kcore/parse_supported.h"
 #include "../../data_lump_rpl.h"
 #include "../usrloc/usrloc.h"
@@ -408,6 +409,8 @@ int build_contact(sip_msg_t *msg, ucontact_t* c, str *host)
 #define EI_R_PARSE_PATH  "Path parse error"                         /* R_PARSE_PATH */
 #define EI_R_PATH_UNSUP  "No support for found Path indicated"      /* R_PATH_UNSUP */
 #define EI_R_OB_UNSUP    "No support for Outbound indicated"        /* R_OB_UNSUP */
+#define EI_R_OB_REQD     "No support for Outbound on server"        /* R_OB_REQD */
+
 
 str error_info[] = {
 	{EI_R_FINE,       sizeof(EI_R_FINE) - 1},
@@ -441,7 +444,7 @@ str error_info[] = {
 	{EI_R_PARSE_PATH, sizeof(EI_R_PARSE_PATH) - 1},
 	{EI_R_PATH_UNSUP, sizeof(EI_R_PATH_UNSUP) - 1},
 	{EI_R_OB_UNSUP,   sizeof(EI_R_OB_UNSUP) - 1},
-
+	{EI_R_OB_REQD,   sizeof(EI_R_OB_REQD) - 1},
 };
 
 int codes[] = {
@@ -475,8 +478,8 @@ int codes[] = {
 	400, /* R_CALLID_LEN */
 	400, /* R_PARSE_PATH */
 	420, /* R_PATH_UNSUP */
-	421  /* R_OB_UNSUP */
-
+	421, /* R_OB_UNSUP */
+	420  /* R_OB_REQD */
 };
 
 
@@ -654,14 +657,27 @@ int reg_send_reply(struct sip_msg* _m)
 			if (add_require(_m, &outbound_str) < 0)
 				return -1;
 
+			if (add_supported(_m, &outbound_str) < 0)
+				return -1;
+
 			if (reg_flow_timer > 0) {
 				if (add_flow_timer(_m) < 0)
 					return -1;
 			}
-			/* Fall-thru */
+			break;
 		case REG_OUTBOUND_SUPPORTED:
 			if (add_supported(_m, &outbound_str) < 0)
 				return -1;
+
+			if (get_require(_m) & F_OPTION_TAG_OUTBOUND) {
+				if (add_require(_m, &outbound_str) < 0)
+					return -1;
+
+				if (reg_flow_timer > 0) {
+					if (add_flow_timer(_m) < 0)
+						return -1;
+				}
+			}
 			break;
 		}
 		break;
@@ -671,6 +687,10 @@ int reg_send_reply(struct sip_msg* _m)
 		if (add_supported(_m, &outbound_str) < 0)
 			return -1;
 		break;
+	case R_OB_REQD:
+		if (add_unsupported(_m, &outbound_str) < 0)
+			return -1;
+		break;
 	default:
 		break;
 	}

modules/registrar/rerrno.h

@@ -64,7 +64,8 @@ typedef enum rerr {
 	R_CALLID_LEN, /*!< Callid too long */
 	R_PARSE_PATH, /*!< Error while parsing Path */
 	R_PATH_UNSUP, /*!< Path not supported by UAC */
-	R_OB_UNSUP    /*!< Outbound not supported by UAC */
+	R_OB_UNSUP,   /*!< Outbound not supported by UAC */
+	R_OB_REQD     /*!< Outbound required by UAC but not supported on server */
 
 } rerr_t;
 

modules/registrar/save.c

@@ -61,6 +61,7 @@
 #include "../../mod_fix.h"
 #include "../../lib/srutils/sruid.h"
 #include "../../lib/kcore/cmpapi.h"
+#include "../../lib/kcore/parse_require.h"
 #include "../../lib/kcore/parse_supported.h"
 #include "../../lib/kcore/statistics.h"
 #ifdef USE_TCP
@@ -843,13 +844,23 @@ int save(struct sip_msg* _m, udomain_t* _d, int _cflags, str *_uri)
 	}
 
 	if (parse_supported(_m) == 0) {
-		if (!(((struct option_tag_body *)_m->supported->parsed)->option_tags_all
-				& F_OPTION_TAG_OUTBOUND) && reg_outbound_mode == REG_OUTBOUND_REQUIRE) {
+		if (!(get_supported(_m)	& F_OPTION_TAG_OUTBOUND)
+				&& reg_outbound_mode == REG_OUTBOUND_REQUIRE) {
 			LM_WARN("Outbound required by server and not supported by UAC\n");
 			rerrno = R_OB_UNSUP;
 			goto error;
 		}
 	}
+
+	if (parse_require(_m) == 0) {
+		if (!(get_require(_m) & F_OPTION_TAG_OUTBOUND)
+				&& reg_outbound_mode == REG_OUTBOUND_NONE) {
+			LM_WARN("Outbound required by client and not supported by server\n");
+			rerrno = R_OB_REQD;
+			goto error;
+		}
+	}
+
 	
 	get_act_time();
 	c = get_first_contact(_m);