{"id":13543,"date":"2020-01-27T13:45:09","date_gmt":"2020-01-27T12:45:09","guid":{"rendered":"https:\/\/www.linphone.org\/?post_type=actualites&#038;p=13543"},"modified":"2025-09-01T15:22:10","modified_gmt":"2025-09-01T13:22:10","slug":"multipart-body-in-sip-invites","status":"publish","type":"actualites","link":"https:\/\/www.linphone.org\/en\/news\/multipart-body-in-sip-invites\/","title":{"rendered":"Multipart body in SIP INVITEs"},"content":{"rendered":"<p>Our Liblinphone library has been modified to support multipart message bodies in INVITEs (as described in<span style=\"color: #ff5e00;\">\u00a0<a style=\"color: #ff5e00;\" href=\"https:\/\/tools.ietf.org\/html\/rfc5621\">RFC 5621<\/a><\/span>), in the purpose of:<\/p>\n<p>allowing an application to specify a custom body to be inserted in INVITE (through a new api call linphone_call_params_add_custom_content), in addition to the normal SDP (hence using multipart body encoding).<br \/>\nallowing liblinphone to receive such INVITE with multipart body, extract the SDP from it and process it normally (currently liblinphone rejects any INVITE that is carrying a body that is not application\/sdp)<\/p>\n<p>As an example, these modifications allow developers to implement Geolocation conveyance in their Liblinphone-based apps, following\u00a0<span style=\"text-decoration: underline;\"><span style=\"color: #ff5e00; text-decoration: underline;\"><a style=\"color: #ff5e00; text-decoration: underline;\" href=\"https:\/\/tools.ietf.org\/html\/rfc6442\">RFC 6442<\/a>.<\/span><\/span><\/p>\n<p>These changes have been implemented and are available in\u00a0<span style=\"color: #ff5e00;\"><a style=\"color: #ff5e00;\" href=\"https:\/\/gitlab.linphone.org\/BC\/public\/liblinphone\/tree\/master\">Liblinphone&#8217;s\u00a0master branch<\/a><\/span>.<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"actualites-category":[42],"class_list":["post-13543","actualites","type-actualites","status-publish","hentry","actualites-category-tech"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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