1use anyhow::Context;
4use netlink_packet_utils::nla::{self, DefaultNla, NlaBuffer, NlasIterator};
5use netlink_packet_utils::traits::{Emitable, Parseable};
6use netlink_packet_utils::DecodeError;
7
8use super::super::buffer_tool::expand_buffer_if_small;
9
10const IFLA_INET_CONF: u16 = 1;
11const __IPV4_DEVCONF_MAX: usize = 34;
13const IPV4_DEVCONF_MAX: usize = __IPV4_DEVCONF_MAX - 1;
14const DEV_CONF_LEN: usize = IPV4_DEVCONF_MAX * 4;
15
16#[derive(Clone, Eq, PartialEq, Debug)]
17#[non_exhaustive]
18pub enum AfSpecInet {
19 DevConf(InetDevConf),
20 Other(DefaultNla),
21}
22
23pub(crate) struct VecAfSpecInet(pub(crate) Vec<AfSpecInet>);
24
25impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for VecAfSpecInet {
26 type Error = DecodeError;
27 fn parse(buf: &NlaBuffer<&'a T>) -> Result<Self, DecodeError> {
28 let mut nlas = vec![];
29 let err = "Invalid AF_INET NLA for IFLA_AF_SPEC(AF_UNSPEC)";
30 for nla in NlasIterator::new(buf.into_inner()) {
31 let nla = nla.context(err)?;
32 nlas.push(AfSpecInet::parse(&nla)?);
33 }
34 Ok(Self(nlas))
35 }
36}
37
38impl nla::Nla for AfSpecInet {
39 fn value_len(&self) -> usize {
40 use self::AfSpecInet::*;
41 match *self {
42 DevConf(ref c) => c.buffer_len(),
43 Other(ref nla) => nla.value_len(),
44 }
45 }
46
47 fn emit_value(&self, buffer: &mut [u8]) {
48 use self::AfSpecInet::*;
49 match *self {
50 DevConf(ref c) => c.emit(buffer),
51 Other(ref nla) => nla.emit_value(buffer),
52 }
53 }
54
55 fn kind(&self) -> u16 {
56 use self::AfSpecInet::*;
57 match *self {
58 DevConf(_) => IFLA_INET_CONF,
59 Other(ref nla) => nla.kind(),
60 }
61 }
62}
63
64impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for AfSpecInet {
65 type Error = DecodeError;
66 fn parse(buf: &NlaBuffer<&'a T>) -> Result<Self, DecodeError> {
67 use self::AfSpecInet::*;
68
69 let payload = buf.value();
70 Ok(match buf.kind() {
71 IFLA_INET_CONF => DevConf(InetDevConf::parse(&InetDevConfBuffer::new(
72 expand_buffer_if_small(payload, DEV_CONF_LEN, "IFLA_INET_CONF").as_slice(),
73 ))?),
74 kind => Other(
75 DefaultNla::parse(buf)
76 .context(format!("Unknown NLA type {kind} for IFLA_AF_SPEC(inet)"))?,
77 ),
78 })
79 }
80}
81
82buffer!(InetDevConfBuffer(DEV_CONF_LEN) {
83 forwarding: (i32, 0..4),
84 mc_forwarding: (i32, 4..8),
85 proxy_arp: (i32, 8..12),
86 accept_redirects: (i32, 12..16),
87 secure_redirects: (i32, 16..20),
88 send_redirects: (i32, 20..24),
89 shared_media: (i32, 24..28),
90 rp_filter: (i32, 28..32),
91 accept_source_route: (i32, 32..36),
92 bootp_relay: (i32, 36..40),
93 log_martians: (i32, 40..44),
94 tag: (i32, 44..48),
95 arpfilter: (i32, 48..52),
96 medium_id: (i32, 52..56),
97 noxfrm: (i32, 56..60),
98 nopolicy: (i32, 60..64),
99 force_igmp_version: (i32, 64..68),
100 arp_announce: (i32, 68..72),
101 arp_ignore: (i32, 72..76),
102 promote_secondaries: (i32, 76..80),
103 arp_accept: (i32, 80..84),
104 arp_notify: (i32, 84..88),
105 accept_local: (i32, 88..92),
106 src_vmark: (i32, 92..96),
107 proxy_arp_pvlan: (i32, 96..100),
108 route_localnet: (i32, 100..104),
109 igmpv2_unsolicited_report_interval: (i32, 104..108),
110 igmpv3_unsolicited_report_interval: (i32, 108..112),
111 ignore_routes_with_linkdown: (i32, 112..116),
112 drop_unicast_in_l2_multicast: (i32, 116..120),
113 drop_gratuitous_arp: (i32, 120..124),
114 bc_forwarding: (i32, 124..128),
115 arp_evict_nocarrier: (i32, 128..132),
116});
117
118#[derive(Clone, Copy, Eq, PartialEq, Debug, Default)]
119#[non_exhaustive]
120pub struct InetDevConf {
121 pub forwarding: i32,
122 pub mc_forwarding: i32,
123 pub proxy_arp: i32,
124 pub accept_redirects: i32,
125 pub secure_redirects: i32,
126 pub send_redirects: i32,
127 pub shared_media: i32,
128 pub rp_filter: i32,
129 pub accept_source_route: i32,
130 pub bootp_relay: i32,
131 pub log_martians: i32,
132 pub tag: i32,
133 pub arpfilter: i32,
134 pub medium_id: i32,
135 pub noxfrm: i32,
136 pub nopolicy: i32,
137 pub force_igmp_version: i32,
138 pub arp_announce: i32,
139 pub arp_ignore: i32,
140 pub promote_secondaries: i32,
141 pub arp_accept: i32,
142 pub arp_notify: i32,
143 pub accept_local: i32,
144 pub src_vmark: i32,
145 pub proxy_arp_pvlan: i32,
146 pub route_localnet: i32,
147 pub igmpv2_unsolicited_report_interval: i32,
148 pub igmpv3_unsolicited_report_interval: i32,
149 pub ignore_routes_with_linkdown: i32,
150 pub drop_unicast_in_l2_multicast: i32,
151 pub drop_gratuitous_arp: i32,
152 pub bc_forwarding: i32,
153 pub arp_evict_nocarrier: i32,
154}
155
156impl<T: AsRef<[u8]>> Parseable<InetDevConfBuffer<T>> for InetDevConf {
157 type Error = DecodeError;
158 fn parse(buf: &InetDevConfBuffer<T>) -> Result<Self, DecodeError> {
159 Ok(Self {
160 forwarding: buf.forwarding(),
161 mc_forwarding: buf.mc_forwarding(),
162 proxy_arp: buf.proxy_arp(),
163 accept_redirects: buf.accept_redirects(),
164 secure_redirects: buf.secure_redirects(),
165 send_redirects: buf.send_redirects(),
166 shared_media: buf.shared_media(),
167 rp_filter: buf.rp_filter(),
168 accept_source_route: buf.accept_source_route(),
169 bootp_relay: buf.bootp_relay(),
170 log_martians: buf.log_martians(),
171 tag: buf.tag(),
172 arpfilter: buf.arpfilter(),
173 medium_id: buf.medium_id(),
174 noxfrm: buf.noxfrm(),
175 nopolicy: buf.nopolicy(),
176 force_igmp_version: buf.force_igmp_version(),
177 arp_announce: buf.arp_announce(),
178 arp_ignore: buf.arp_ignore(),
179 promote_secondaries: buf.promote_secondaries(),
180 arp_accept: buf.arp_accept(),
181 arp_notify: buf.arp_notify(),
182 accept_local: buf.accept_local(),
183 src_vmark: buf.src_vmark(),
184 proxy_arp_pvlan: buf.proxy_arp_pvlan(),
185 route_localnet: buf.route_localnet(),
186 igmpv2_unsolicited_report_interval: buf.igmpv2_unsolicited_report_interval(),
187 igmpv3_unsolicited_report_interval: buf.igmpv3_unsolicited_report_interval(),
188 ignore_routes_with_linkdown: buf.ignore_routes_with_linkdown(),
189 drop_unicast_in_l2_multicast: buf.drop_unicast_in_l2_multicast(),
190 drop_gratuitous_arp: buf.drop_gratuitous_arp(),
191 bc_forwarding: buf.bc_forwarding(),
192 arp_evict_nocarrier: buf.arp_evict_nocarrier(),
193 })
194 }
195}
196
197impl Emitable for InetDevConf {
198 fn buffer_len(&self) -> usize {
199 DEV_CONF_LEN
200 }
201
202 fn emit(&self, buffer: &mut [u8]) {
203 let mut buffer = InetDevConfBuffer::new(buffer);
204 buffer.set_forwarding(self.forwarding);
205 buffer.set_mc_forwarding(self.mc_forwarding);
206 buffer.set_proxy_arp(self.proxy_arp);
207 buffer.set_accept_redirects(self.accept_redirects);
208 buffer.set_secure_redirects(self.secure_redirects);
209 buffer.set_send_redirects(self.send_redirects);
210 buffer.set_shared_media(self.shared_media);
211 buffer.set_rp_filter(self.rp_filter);
212 buffer.set_accept_source_route(self.accept_source_route);
213 buffer.set_bootp_relay(self.bootp_relay);
214 buffer.set_log_martians(self.log_martians);
215 buffer.set_tag(self.tag);
216 buffer.set_arpfilter(self.arpfilter);
217 buffer.set_medium_id(self.medium_id);
218 buffer.set_noxfrm(self.noxfrm);
219 buffer.set_nopolicy(self.nopolicy);
220 buffer.set_force_igmp_version(self.force_igmp_version);
221 buffer.set_arp_announce(self.arp_announce);
222 buffer.set_arp_ignore(self.arp_ignore);
223 buffer.set_promote_secondaries(self.promote_secondaries);
224 buffer.set_arp_accept(self.arp_accept);
225 buffer.set_arp_notify(self.arp_notify);
226 buffer.set_accept_local(self.accept_local);
227 buffer.set_src_vmark(self.src_vmark);
228 buffer.set_proxy_arp_pvlan(self.proxy_arp_pvlan);
229 buffer.set_route_localnet(self.route_localnet);
230 buffer.set_igmpv2_unsolicited_report_interval(self.igmpv2_unsolicited_report_interval);
231 buffer.set_igmpv3_unsolicited_report_interval(self.igmpv3_unsolicited_report_interval);
232 buffer.set_ignore_routes_with_linkdown(self.ignore_routes_with_linkdown);
233 buffer.set_drop_unicast_in_l2_multicast(self.drop_unicast_in_l2_multicast);
234 buffer.set_drop_gratuitous_arp(self.drop_gratuitous_arp);
235 buffer.set_bc_forwarding(self.bc_forwarding);
236 buffer.set_arp_evict_nocarrier(self.arp_evict_nocarrier);
237 }
238}