From: Naveen Albert <asterisk@phreaknet.org>
Date: Mon, 17 Oct 2022 00:33:44 +0000 (+0000)
Subject: res_pjsip_session.c: Map empty extensions in INVITEs to s.
X-Git-Tag: 18.16.0-rc1~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=833f2af3da067f897c2da85ddde87dac2c28eea3;p=thirdparty%2Fasterisk.git

res_pjsip_session.c: Map empty extensions in INVITEs to s.

Some SIP devices use an empty extension for PLAR functionality.

Rather than rejecting these empty extensions, we now use the s
extension for such calls to mirror the existing PLAR functionality
in Asterisk (e.g. chan_dahdi).

ASTERISK-30265 #close

Change-Id: I0861a405cd49bbbf532b52f7b47f0e2810832590
---

diff --git a/res/res_pjsip_session.c b/res/res_pjsip_session.c
index a7bde0da4e..67dcdf50d1 100644
--- a/res/res_pjsip_session.c
+++ b/res/res_pjsip_session.c
@@ -3665,6 +3665,11 @@ static enum sip_get_destination_result get_destination(struct ast_sip_session *s
 	}
 
 	ast_copy_pj_str(session->exten, ast_sip_pjsip_uri_get_username(ruri), sizeof(session->exten));
+	if (ast_strlen_zero(session->exten)) {
+		/* Some SIP devices send an empty extension for PLAR: this should map to s */
+		ast_debug(1, "RURI contains no user portion: defaulting to extension 's'\n");
+		ast_copy_string(session->exten, "s", sizeof(session->exten));
+	}
 
 	/*
 	 * We may want to match in the dialplan without any user