PJSIP: Handle defaults properly

This updates the code behind PJSIP configuration options with custom
handlers to deal with the assigned default values properly where it
makes sense and adjusting the default value where it doesn't. Before
applying this patch, there were several cases where the default value
for an option would prevent that config section from loading properly.

Reported by: Thomas Thompson
Review: https://reviewboard.asterisk.org/r/4019/
........

Merged revisions 424263 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 424266 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@424267 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/samples/pjsip.conf.sample

@@ -490,7 +490,7 @@
 ;aors=  ; AoR s to be used with the endpoint (default: "")
 ;auth=  ; Authentication Object s associated with the endpoint (default: "")
 ;callerid=      ; CallerID information for the endpoint (default: "")
-;callerid_privacy=      ; Default privacy level (default: "")
+;callerid_privacy=allowed      ; Default privacy level (default: "allowed")
 ;callerid_tag=  ; Internal id_tag for the endpoint (default: "")
 ;context=default        ; Dialplan context for inbound sessions (default:
                         ; "default")
@@ -596,10 +596,10 @@
                 ; this endpoint (default: "")
 ;from_domain=   ; Domain to user in From header for requests to this endpoint
                 ; (default: "")
-;dtls_verify=   ; Verify that the provided peer certificate is valid (default:
+;dtls_verify=no ; Verify that the provided peer certificate is valid (default:
-                ; "")
+                ; "no")
-;dtls_rekey=    ; Interval at which to renegotiate the TLS session and rekey
+;dtls_rekey=0   ; Interval at which to renegotiate the TLS session and rekey
-                ; the SRTP session (default: "")
+                ; the SRTP session (default: "0")
 ;dtls_cert_file=        ; Path to certificate file to present to peer (default:
                         ; "")
 ;dtls_private_key=      ; Path to private key for certificate file (default:

res/res_pjsip/config_transport.c

@@ -349,7 +349,7 @@ static int transport_tls_method_handler(const struct aco_option *opt, struct ast
 {
 	struct ast_sip_transport *transport = obj;
 
-	if (!strcasecmp(var->value, "default")) {
+	if (ast_strlen_zero(var->value) || !strcasecmp(var->value, "default")) {
 		transport->tls.method = PJSIP_SSL_DEFAULT_METHOD;
 	} else if (!strcasecmp(var->value, "unspecified")) {
 		transport->tls.method = PJSIP_SSL_UNSPECIFIED_METHOD;
@@ -416,6 +416,10 @@ static int transport_tls_cipher_handler(const struct aco_option *opt, struct ast
 	struct ast_sip_transport *transport = obj;
 	pj_ssl_cipher cipher;
 
+	if (ast_strlen_zero(var->value)) {
+		return 0;
+	}
+
 	if (transport->tls.ciphers_num == (SIP_TLS_MAX_CIPHERS - 1)) {
 		return -1;
 	}
@@ -468,6 +472,12 @@ static int transport_localnet_handler(const struct aco_option *opt, struct ast_v
 	struct ast_sip_transport *transport = obj;
 	int error = 0;
 
+	if (ast_strlen_zero(var->value)) {
+		ast_free_ha(transport->localnet);
+		transport->localnet = NULL;
+		return 0;
+	}
+
 	if (!(transport->localnet = ast_append_ha("d", var->value, transport->localnet, &error))) {
 		return -1;
 	}

res/res_pjsip/location.c

@@ -290,9 +290,14 @@ static int permanent_uri_handler(const struct aco_option *opt, struct ast_variab
 {
 	struct ast_sip_aor *aor = obj;
 	const char *aor_id = ast_sorcery_object_get_id(aor);
-	char *contacts = ast_strdupa(var->value);
+	char *contacts;
 	char *contact_uri;
 
+	if (ast_strlen_zero(var->value)) {
+		return 0;
+	}
+
+	contacts = ast_strdupa(var->value);
 	while ((contact_uri = strsep(&contacts, ","))) {
 		struct ast_sip_contact *contact;
 		char contact_id[strlen(aor_id) + strlen(contact_uri) + 2 + 1];

res/res_pjsip/pjsip_configuration.c

@@ -559,13 +559,9 @@ static int group_handler(const struct aco_option *opt,
 	struct ast_sip_endpoint *endpoint = obj;
 
 	if (!strncmp(var->name, "call_group", 10)) {
-		if (!(endpoint->pickup.callgroup = ast_get_group(var->value))) {
+		endpoint->pickup.callgroup = ast_get_group(var->value);
-			return -1;
-		}
 	} else if (!strncmp(var->name, "pickup_group", 12)) {
-		if (!(endpoint->pickup.pickupgroup = ast_get_group(var->value))) {
+		endpoint->pickup.pickupgroup = ast_get_group(var->value);
-			return -1;
-		}
 	} else {
 		return -1;
 	}
@@ -603,12 +599,18 @@ static int named_groups_handler(const struct aco_option *opt,
 	struct ast_sip_endpoint *endpoint = obj;
 
 	if (!strncmp(var->name, "named_call_group", 16)) {
-		if (!(endpoint->pickup.named_callgroups =
+		if (ast_strlen_zero(var->value)) {
+			endpoint->pickup.named_callgroups =
+				ast_unref_namedgroups(endpoint->pickup.named_callgroups);
+		} else if (!(endpoint->pickup.named_callgroups =
 		      ast_get_namedgroups(var->value))) {
 			return -1;
 		}
 	} else if (!strncmp(var->name, "named_pickup_group", 18)) {
-		if (!(endpoint->pickup.named_pickupgroups =
+		if (ast_strlen_zero(var->value)) {
+			endpoint->pickup.named_pickupgroups =
+				ast_unref_namedgroups(endpoint->pickup.named_pickupgroups);
+		} else if (!(endpoint->pickup.named_pickupgroups =
 		      ast_get_namedgroups(var->value))) {
 			return -1;
 		}
@@ -808,7 +810,15 @@ static int set_var_handler(const struct aco_option *opt,
 {
 	struct ast_sip_endpoint *endpoint = obj;
 	struct ast_variable *new_var;
-	char *name = ast_strdupa(var->value), *val = strchr(name, '=');
+	char *name;
+	char *val;
+
+	if (ast_strlen_zero(var->value)) {
+		return 0;
+	}
+
+	name = ast_strdupa(var->value);
+	val = strchr(name, '=');
 
 	if (!val) {
 		return -1;
@@ -1677,7 +1687,7 @@ int ast_res_pjsip_initialize_configuration(const struct ast_module_info *ast_mod
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "direct_media_glare_mitigation", "none", direct_media_glare_mitigation_handler, direct_media_glare_mitigation_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "disable_direct_media_on_nat", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.direct_media.disable_on_nat));
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid", "", caller_id_handler, caller_id_to_str, NULL, 0, 0);
-	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid_privacy", "", caller_id_privacy_handler, caller_id_privacy_to_str, NULL, 0, 0);
+	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid_privacy", "allowed", caller_id_privacy_handler, caller_id_privacy_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid_tag", "", caller_id_tag_handler, caller_id_tag_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "trust_id_inbound", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.trust_inbound));
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "trust_id_outbound", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.trust_outbound));
@@ -1720,8 +1730,8 @@ int ast_res_pjsip_initialize_configuration(const struct ast_module_info *ast_mod
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "from_domain", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, fromdomain));
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "mwi_from_user", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, subscription.mwi.fromuser));
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_engine", "asterisk", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.rtp.engine));
-	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_verify", "", dtls_handler, dtlsverify_to_str, NULL, 0, 0);
+	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_verify", "no", dtls_handler, dtlsverify_to_str, NULL, 0, 0);
-	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_rekey", "", dtls_handler, dtlsrekey_to_str, NULL, 0, 0);
+	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_rekey", "0", dtls_handler, dtlsrekey_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_cert_file", "", dtls_handler, dtlscertfile_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_private_key", "", dtls_handler, dtlsprivatekey_to_str, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_cipher", "", dtls_handler, dtlscipher_to_str, NULL, 0, 0);

res/res_pjsip_endpoint_identifier_ip.c

@@ -160,6 +160,10 @@ static int ip_identify_match_handler(const struct aco_option *opt, struct ast_va
 	char *input_string = ast_strdupa(var->value);
 	char *current_string;
 
+	if (ast_strlen_zero(var->value)) {
+		return 0;
+	}
+
 	while ((current_string = strsep(&input_string, ","))) {
 		struct ast_sockaddr *addrs;
 		int num_addrs = 0, error = 0, i;