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Netlink support for FreeBSD 13.2 and later
This is an early subset of the Netlink interface, but it proves sufficient for monitoring changes in IP addresses, the coverage can be extended later as needed. Signed-off-by: Yann Dirson <[email protected]>
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‎libc-test/build.rs

+90
Original file line numberDiff line numberDiff line change
@@ -2071,6 +2071,8 @@ fn test_freebsd(target: &str) {
20712071
"netinet/sctp.h",
20722072
"netinet/tcp.h",
20732073
"netinet/udp.h",
2074+
[freebsd13]:"netlink/netlink.h",
2075+
[freebsd13]:"netlink/netlink_generic.h",
20742076
"poll.h",
20752077
"pthread.h",
20762078
"pthread_np.h",
@@ -2305,6 +2307,91 @@ fn test_freebsd(target: &str) {
23052307
// Added in in FreeBSD 13.0 (r367776 and r367287)
23062308
"SCM_CREDS2" | "LOCAL_CREDS_PERSISTENT" if Some(13) > freebsd_ver => true,
23072309

2310+
// Added in FreeBSD 13.2
2311+
"AF_NETLINK"
2312+
| "PF_NETLINK"
2313+
| "SOL_NETLINK"
2314+
| "NETLINK_ADD_MEMBERSHIP"
2315+
| "NETLINK_DROP_MEMBERSHIP"
2316+
| "NETLINK_PKTINFO"
2317+
| "NETLINK_BROADCAST_ERROR"
2318+
| "NETLINK_NO_ENOBUFS"
2319+
| "NETLINK_RX_RING"
2320+
| "NETLINK_TX_RING"
2321+
| "NETLINK_LISTEN_ALL_NSID"
2322+
| "NETLINK_LIST_MEMBERSHIPS"
2323+
| "NETLINK_CAP_ACK"
2324+
| "NETLINK_EXT_ACK"
2325+
| "NETLINK_GET_STRICT_CHK"
2326+
| "NLM_F_REQUEST"
2327+
| "NLM_F_MULTI"
2328+
| "NLM_F_ACK"
2329+
| "NLM_F_ECHO"
2330+
| "NLM_F_DUMP_INTR"
2331+
| "NLM_F_DUMP_FILTERED"
2332+
| "NLM_F_ROOT"
2333+
| "NLM_F_MATCH"
2334+
| "NLM_F_ATOMIC"
2335+
| "NLM_F_DUMP"
2336+
| "NLM_F_REPLACE"
2337+
| "NLM_F_EXCL"
2338+
| "NLM_F_CREATE"
2339+
| "NLM_F_APPEND"
2340+
| "NLM_F_NONREC"
2341+
| "NLM_F_CAPPED"
2342+
| "NLM_F_ACK_TLVS"
2343+
| "NLMSG_NOOP"
2344+
| "NLMSG_ERROR"
2345+
| "NLMSG_DONE"
2346+
| "NLMSG_OVERRUN"
2347+
| "NETLINK_ROUTE"
2348+
| "NETLINK_UNUSED"
2349+
| "NETLINK_USERSOCK"
2350+
| "NETLINK_FIREWALL"
2351+
| "NETLINK_SOCK_DIAG"
2352+
| "NETLINK_NFLOG"
2353+
| "NETLINK_XFRM"
2354+
| "NETLINK_SELINUX"
2355+
| "NETLINK_ISCSI"
2356+
| "NETLINK_AUDIT"
2357+
| "NETLINK_FIB_LOOKUP"
2358+
| "NETLINK_CONNECTOR"
2359+
| "NETLINK_NETFILTER"
2360+
| "NETLINK_IP6_FW"
2361+
| "NETLINK_DNRTMSG"
2362+
| "NETLINK_KOBJECT_UEVENT"
2363+
| "NETLINK_GENERIC"
2364+
| "NLMSG_ALIGNTO"
2365+
| "CTRL_CMD_UNSPEC"
2366+
| "CTRL_CMD_NEWFAMILY"
2367+
| "CTRL_CMD_DELFAMILY"
2368+
| "CTRL_CMD_GETFAMILY"
2369+
| "CTRL_CMD_NEWOPS"
2370+
| "CTRL_CMD_DELOPS"
2371+
| "CTRL_CMD_GETOPS"
2372+
| "CTRL_CMD_NEWMCAST_GRP"
2373+
| "CTRL_CMD_DELMCAST_GRP"
2374+
| "CTRL_CMD_GETMCAST_GRP"
2375+
| "CTRL_CMD_GETPOLICY"
2376+
| "CTRL_ATTR_UNSPEC"
2377+
| "CTRL_ATTR_FAMILY_ID"
2378+
| "CTRL_ATTR_FAMILY_NAME"
2379+
| "CTRL_ATTR_VERSION"
2380+
| "CTRL_ATTR_HDRSIZE"
2381+
| "CTRL_ATTR_MAXATTR"
2382+
| "CTRL_ATTR_OPS"
2383+
| "CTRL_ATTR_MCAST_GROUPS"
2384+
| "CTRL_ATTR_POLICY"
2385+
| "CTRL_ATTR_OP_POLICY"
2386+
| "CTRL_ATTR_OP"
2387+
| "CTRL_ATTR_MCAST_GRP_UNSPEC"
2388+
| "CTRL_ATTR_MCAST_GRP_NAME"
2389+
| "CTRL_ATTR_MCAST_GRP_ID"
2390+
if Some(13) > freebsd_ver =>
2391+
{
2392+
true
2393+
}
2394+
23082395
// Added in FreeBSD 14
23092396
"SPACECTL_DEALLOC" if Some(14) > freebsd_ver => true,
23102397

@@ -2490,6 +2577,9 @@ fn test_freebsd(target: &str) {
24902577
// `shm_largepage_conf` was introduced in FreeBSD 13.
24912578
"shm_largepage_conf" if Some(13) > freebsd_ver => true,
24922579

2580+
// `sockaddr_nl` introduced in FreeBSD 13.2
2581+
"sockaddr_nl" if Some(13) > freebsd_ver => true,
2582+
24932583
// Those are private types
24942584
"memory_type" => true,
24952585
"memory_type_list" => true,

‎src/unix/bsd/freebsdlike/freebsd/mod.rs

+134
Original file line numberDiff line numberDiff line change
@@ -1385,6 +1385,14 @@ s_no_extra_traits! {
13851385
pub sdl_data: [::c_char; 46],
13861386
}
13871387

1388+
pub struct sockaddr_nl {
1389+
pub nl_len: ::c_uchar,
1390+
pub nl_family: ::sa_family_t,
1391+
nl_pad: ::c_ushort,
1392+
pub nl_pid: u32,
1393+
pub nl_groups: u32
1394+
}
1395+
13881396
pub struct mq_attr {
13891397
pub mq_flags: ::c_long,
13901398
pub mq_maxmsg: ::c_long,
@@ -1798,6 +1806,34 @@ cfg_if! {
17981806
}
17991807
}
18001808

1809+
impl PartialEq for sockaddr_nl {
1810+
fn eq(&self, other: &sockaddr_nl) -> bool {
1811+
self.nl_len == other.nl_len &&
1812+
self.nl_family == other.nl_family &&
1813+
self.nl_pid == other.nl_pid &&
1814+
self.nl_groups == other.nl_groups
1815+
}
1816+
}
1817+
impl Eq for sockaddr_nl {}
1818+
impl ::fmt::Debug for sockaddr_nl {
1819+
fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
1820+
f.debug_struct("sockaddr_nl")
1821+
.field("nl_len", &self.nl_len)
1822+
.field("nl_family", &self.nl_family)
1823+
.field("nl_pid", &self.nl_pid)
1824+
.field("nl_groups", &self.nl_groups)
1825+
.finish()
1826+
}
1827+
}
1828+
impl ::hash::Hash for sockaddr_nl {
1829+
fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
1830+
self.nl_len.hash(state);
1831+
self.nl_family.hash(state);
1832+
self.nl_pid.hash(state);
1833+
self.nl_groups.hash(state);
1834+
}
1835+
}
1836+
18011837
impl PartialEq for mq_attr {
18021838
fn eq(&self, other: &mq_attr) -> bool {
18031839
self.mq_flags == other.mq_flags &&
@@ -3059,6 +3095,104 @@ pub const SO_TS_MONOTONIC: ::c_int = 3;
30593095
pub const SO_TS_DEFAULT: ::c_int = SO_TS_REALTIME_MICRO;
30603096
pub const SO_TS_CLOCK_MAX: ::c_int = SO_TS_MONOTONIC;
30613097

3098+
/// netlink constants
3099+
3100+
// sys/socket.h
3101+
pub const AF_NETLINK: ::c_int = 38;
3102+
pub const PF_NETLINK: ::c_int = AF_NETLINK;
3103+
3104+
// netlink/netlink.h
3105+
pub const SOL_NETLINK: ::c_int = 270;
3106+
pub const NETLINK_ADD_MEMBERSHIP: ::c_int = 1;
3107+
pub const NETLINK_DROP_MEMBERSHIP: ::c_int = 2;
3108+
pub const NETLINK_PKTINFO: ::c_int = 3;
3109+
pub const NETLINK_BROADCAST_ERROR: ::c_int = 4;
3110+
pub const NETLINK_NO_ENOBUFS: ::c_int = 5;
3111+
pub const NETLINK_RX_RING: ::c_int = 6;
3112+
pub const NETLINK_TX_RING: ::c_int = 7;
3113+
pub const NETLINK_LISTEN_ALL_NSID: ::c_int = 8;
3114+
pub const NETLINK_LIST_MEMBERSHIPS: ::c_int = 9;
3115+
pub const NETLINK_CAP_ACK: ::c_int = 10;
3116+
pub const NETLINK_EXT_ACK: ::c_int = 11;
3117+
pub const NETLINK_GET_STRICT_CHK: ::c_int = 12;
3118+
//
3119+
pub const NLM_F_REQUEST: ::c_int = 0x01;
3120+
pub const NLM_F_MULTI: ::c_int = 0x02;
3121+
pub const NLM_F_ACK: ::c_int = 0x04;
3122+
pub const NLM_F_ECHO: ::c_int = 0x08;
3123+
pub const NLM_F_DUMP_INTR: ::c_int = 0x10;
3124+
pub const NLM_F_DUMP_FILTERED: ::c_int = 0x20;
3125+
//
3126+
pub const NLM_F_ROOT: ::c_int = 0x100;
3127+
pub const NLM_F_MATCH: ::c_int = 0x200;
3128+
pub const NLM_F_ATOMIC: ::c_int = 0x400;
3129+
pub const NLM_F_DUMP: ::c_int = NLM_F_ROOT | NLM_F_MATCH;
3130+
//
3131+
pub const NLM_F_REPLACE: ::c_int = 0x100;
3132+
pub const NLM_F_EXCL: ::c_int = 0x200;
3133+
pub const NLM_F_CREATE: ::c_int = 0x400;
3134+
pub const NLM_F_APPEND: ::c_int = 0x800;
3135+
//
3136+
pub const NLM_F_NONREC: ::c_int = 0x100;
3137+
//
3138+
pub const NLM_F_CAPPED: ::c_int = 0x100;
3139+
pub const NLM_F_ACK_TLVS: ::c_int = 0x200;
3140+
//
3141+
pub const NLMSG_NOOP: ::c_int = 0x1;
3142+
pub const NLMSG_ERROR: ::c_int = 0x2;
3143+
pub const NLMSG_DONE: ::c_int = 0x3;
3144+
pub const NLMSG_OVERRUN: ::c_int = 0x4;
3145+
//
3146+
pub const NETLINK_ROUTE: ::c_int = 0;
3147+
pub const NETLINK_UNUSED: ::c_int = 1;
3148+
pub const NETLINK_USERSOCK: ::c_int = 2;
3149+
pub const NETLINK_FIREWALL: ::c_int = 3;
3150+
pub const NETLINK_SOCK_DIAG: ::c_int = 4;
3151+
pub const NETLINK_NFLOG: ::c_int = 5;
3152+
pub const NETLINK_XFRM: ::c_int = 6;
3153+
pub const NETLINK_SELINUX: ::c_int = 7;
3154+
pub const NETLINK_ISCSI: ::c_int = 8;
3155+
pub const NETLINK_AUDIT: ::c_int = 9;
3156+
pub const NETLINK_FIB_LOOKUP: ::c_int = 10;
3157+
pub const NETLINK_CONNECTOR: ::c_int = 11;
3158+
pub const NETLINK_NETFILTER: ::c_int = 12;
3159+
pub const NETLINK_IP6_FW: ::c_int = 13;
3160+
pub const NETLINK_DNRTMSG: ::c_int = 14;
3161+
pub const NETLINK_KOBJECT_UEVENT: ::c_int = 15;
3162+
pub const NETLINK_GENERIC: ::c_int = 16;
3163+
//
3164+
const NL_ITEM_ALIGN_SIZE: ::c_int = 4; // mem::size_of::<u32>(); FIXME accept new dep?
3165+
pub const NLMSG_ALIGNTO: ::c_int = NL_ITEM_ALIGN_SIZE;
3166+
3167+
// netlink/netlink_generic.h
3168+
pub const CTRL_CMD_UNSPEC: ::c_int = 0;
3169+
pub const CTRL_CMD_NEWFAMILY: ::c_int = 1;
3170+
pub const CTRL_CMD_DELFAMILY: ::c_int = 2;
3171+
pub const CTRL_CMD_GETFAMILY: ::c_int = 3;
3172+
pub const CTRL_CMD_NEWOPS: ::c_int = 4;
3173+
pub const CTRL_CMD_DELOPS: ::c_int = 5;
3174+
pub const CTRL_CMD_GETOPS: ::c_int = 6;
3175+
pub const CTRL_CMD_NEWMCAST_GRP: ::c_int = 7;
3176+
pub const CTRL_CMD_DELMCAST_GRP: ::c_int = 8;
3177+
pub const CTRL_CMD_GETMCAST_GRP: ::c_int = 9;
3178+
pub const CTRL_CMD_GETPOLICY: ::c_int = 10;
3179+
//
3180+
pub const CTRL_ATTR_UNSPEC: ::c_int = 0;
3181+
pub const CTRL_ATTR_FAMILY_ID: ::c_int = 1;
3182+
pub const CTRL_ATTR_FAMILY_NAME: ::c_int = 2;
3183+
pub const CTRL_ATTR_VERSION: ::c_int = 3;
3184+
pub const CTRL_ATTR_HDRSIZE: ::c_int = 4;
3185+
pub const CTRL_ATTR_MAXATTR: ::c_int = 5;
3186+
pub const CTRL_ATTR_OPS: ::c_int = 6;
3187+
pub const CTRL_ATTR_MCAST_GROUPS: ::c_int = 7;
3188+
pub const CTRL_ATTR_POLICY: ::c_int = 8;
3189+
pub const CTRL_ATTR_OP_POLICY: ::c_int = 9;
3190+
pub const CTRL_ATTR_OP: ::c_int = 10;
3191+
//
3192+
pub const CTRL_ATTR_MCAST_GRP_UNSPEC: ::c_int = 0;
3193+
pub const CTRL_ATTR_MCAST_GRP_NAME: ::c_int = 1;
3194+
pub const CTRL_ATTR_MCAST_GRP_ID: ::c_int = 2;
3195+
30623196
pub const LOCAL_CREDS: ::c_int = 2;
30633197
pub const LOCAL_CREDS_PERSISTENT: ::c_int = 3;
30643198
pub const LOCAL_CONNWAIT: ::c_int = 4;

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