1// Copyright (c) 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
 2//
 3// This Source Code Form is subject to the terms of the Mozilla Public
 4// License, v. 2.0. If a copy of the MPL was not distributed with this
 5// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 6
 7use xso::{AsXml, FromXml};
 8
 9use crate::ns;
10
11generate_attribute!(
12    /// Which party is allowed to send the negotiated RTP Header Extensions.
13    Senders, "senders", {
14        /// Both parties can send them.
15        Both => "both",
16
17        /// Only the initiator can send them.
18        Initiator => "initiator",
19
20        /// Only the responder can send them.
21        Responder => "responder",
22    }, Default = Both
23);
24
25/// Header extensions to be used in a RTP description.
26#[derive(FromXml, AsXml, PartialEq, Debug, Clone)]
27#[xml(namespace = ns::JINGLE_RTP_HDREXT, name = "rtp-hdrext")]
28pub struct RtpHdrext {
29    /// The ID of the extensions.  The allowed values are only in the 1-256, 4096-4351 ranges,
30    /// this isn’t enforced by xmpp-parsers yet!
31    // TODO: make it so.
32    #[xml(attribute)]
33    pub id: u16,
34
35    /// The URI that defines the extension.
36    #[xml(attribute)]
37    pub uri: String,
38
39    /// Which party is allowed to send the negotiated RTP Header Extensions.
40    #[xml(attribute(default))]
41    pub senders: Senders,
42}
43
44impl RtpHdrext {
45    /// Create a new RTP header extension element.
46    pub fn new(id: u16, uri: String) -> RtpHdrext {
47        RtpHdrext {
48            id,
49            uri,
50            senders: Default::default(),
51        }
52    }
53
54    /// Set the senders.
55    pub fn with_senders(mut self, senders: Senders) -> RtpHdrext {
56        self.senders = senders;
57        self
58    }
59}
60
61#[cfg(test)]
62mod tests {
63    use super::*;
64    use minidom::Element;
65
66    #[cfg(target_pointer_width = "32")]
67    #[test]
68    fn test_size() {
69        assert_size!(Senders, 1);
70        assert_size!(RtpHdrext, 16);
71    }
72
73    #[cfg(target_pointer_width = "64")]
74    #[test]
75    fn test_size() {
76        assert_size!(Senders, 1);
77        assert_size!(RtpHdrext, 32);
78    }
79
80    #[test]
81    fn parse_exthdr() {
82        let elem: Element = "<rtp-hdrext xmlns='urn:xmpp:jingle:apps:rtp:rtp-hdrext:0'
83                    uri='urn:ietf:params:rtp-hdrext:toffset'
84                    id='1'/>"
85            .parse()
86            .unwrap();
87        let rtp_hdrext = RtpHdrext::try_from(elem).unwrap();
88        assert_eq!(rtp_hdrext.id, 1);
89        assert_eq!(rtp_hdrext.uri, "urn:ietf:params:rtp-hdrext:toffset");
90        assert_eq!(rtp_hdrext.senders, Senders::Both);
91    }
92}