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Netlink support for FreeBSD 13.2 and later
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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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@ydirson
ydirson committed Aug 28, 2024
1 parent ae16a69 commit 98d71b4
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90 changes: 90 additions & 0 deletions libc-test/build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2072,6 +2072,8 @@ fn test_freebsd(target: &str) {
"netinet/sctp.h",
"netinet/tcp.h",
"netinet/udp.h",
[freebsd13]:"netlink/netlink.h",
[freebsd13]:"netlink/netlink_generic.h",
"poll.h",
"pthread.h",
"pthread_np.h",
Expand Down Expand Up @@ -2312,6 +2314,91 @@ fn test_freebsd(target: &str) {
// Added in FreeBSD 13.0 (r367776 and r367287)
"SCM_CREDS2" | "LOCAL_CREDS_PERSISTENT" if Some(13) > freebsd_ver => true,

// Added in FreeBSD 13.2
"AF_NETLINK"
| "PF_NETLINK"
| "SOL_NETLINK"
| "NETLINK_ADD_MEMBERSHIP"
| "NETLINK_DROP_MEMBERSHIP"
| "NETLINK_PKTINFO"
| "NETLINK_BROADCAST_ERROR"
| "NETLINK_NO_ENOBUFS"
| "NETLINK_RX_RING"
| "NETLINK_TX_RING"
| "NETLINK_LISTEN_ALL_NSID"
| "NETLINK_LIST_MEMBERSHIPS"
| "NETLINK_CAP_ACK"
| "NETLINK_EXT_ACK"
| "NETLINK_GET_STRICT_CHK"
| "NLM_F_REQUEST"
| "NLM_F_MULTI"
| "NLM_F_ACK"
| "NLM_F_ECHO"
| "NLM_F_DUMP_INTR"
| "NLM_F_DUMP_FILTERED"
| "NLM_F_ROOT"
| "NLM_F_MATCH"
| "NLM_F_ATOMIC"
| "NLM_F_DUMP"
| "NLM_F_REPLACE"
| "NLM_F_EXCL"
| "NLM_F_CREATE"
| "NLM_F_APPEND"
| "NLM_F_NONREC"
| "NLM_F_CAPPED"
| "NLM_F_ACK_TLVS"
| "NLMSG_NOOP"
| "NLMSG_ERROR"
| "NLMSG_DONE"
| "NLMSG_OVERRUN"
| "NETLINK_ROUTE"
| "NETLINK_UNUSED"
| "NETLINK_USERSOCK"
| "NETLINK_FIREWALL"
| "NETLINK_SOCK_DIAG"
| "NETLINK_NFLOG"
| "NETLINK_XFRM"
| "NETLINK_SELINUX"
| "NETLINK_ISCSI"
| "NETLINK_AUDIT"
| "NETLINK_FIB_LOOKUP"
| "NETLINK_CONNECTOR"
| "NETLINK_NETFILTER"
| "NETLINK_IP6_FW"
| "NETLINK_DNRTMSG"
| "NETLINK_KOBJECT_UEVENT"
| "NETLINK_GENERIC"
| "NLMSG_ALIGNTO"
| "CTRL_CMD_UNSPEC"
| "CTRL_CMD_NEWFAMILY"
| "CTRL_CMD_DELFAMILY"
| "CTRL_CMD_GETFAMILY"
| "CTRL_CMD_NEWOPS"
| "CTRL_CMD_DELOPS"
| "CTRL_CMD_GETOPS"
| "CTRL_CMD_NEWMCAST_GRP"
| "CTRL_CMD_DELMCAST_GRP"
| "CTRL_CMD_GETMCAST_GRP"
| "CTRL_CMD_GETPOLICY"
| "CTRL_ATTR_UNSPEC"
| "CTRL_ATTR_FAMILY_ID"
| "CTRL_ATTR_FAMILY_NAME"
| "CTRL_ATTR_VERSION"
| "CTRL_ATTR_HDRSIZE"
| "CTRL_ATTR_MAXATTR"
| "CTRL_ATTR_OPS"
| "CTRL_ATTR_MCAST_GROUPS"
| "CTRL_ATTR_POLICY"
| "CTRL_ATTR_OP_POLICY"
| "CTRL_ATTR_OP"
| "CTRL_ATTR_MCAST_GRP_UNSPEC"
| "CTRL_ATTR_MCAST_GRP_NAME"
| "CTRL_ATTR_MCAST_GRP_ID"
if Some(13) > freebsd_ver =>
{
true
}

// Added in FreeBSD 14
"SPACECTL_DEALLOC" if Some(14) > freebsd_ver => true,

Expand Down Expand Up @@ -2517,6 +2604,9 @@ fn test_freebsd(target: &str) {
// `shm_largepage_conf` was introduced in FreeBSD 13.
"shm_largepage_conf" if Some(13) > freebsd_ver => true,

// `sockaddr_nl` introduced in FreeBSD 13.2
"sockaddr_nl" if Some(13) > freebsd_ver => true,

// Those are private types
"memory_type" => true,
"memory_type_list" => true,
Expand Down
134 changes: 134 additions & 0 deletions src/unix/bsd/freebsdlike/freebsd/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1388,6 +1388,14 @@ s_no_extra_traits! {
pub sdl_data: [::c_char; 46],
}

pub struct sockaddr_nl {
pub nl_len: ::c_uchar,
pub nl_family: ::sa_family_t,
nl_pad: ::c_ushort,
pub nl_pid: u32,
pub nl_groups: u32
}

pub struct mq_attr {
pub mq_flags: ::c_long,
pub mq_maxmsg: ::c_long,
Expand Down Expand Up @@ -1788,6 +1796,34 @@ cfg_if! {
}
}

impl PartialEq for sockaddr_nl {
fn eq(&self, other: &sockaddr_nl) -> bool {
self.nl_len == other.nl_len &&
self.nl_family == other.nl_family &&
self.nl_pid == other.nl_pid &&
self.nl_groups == other.nl_groups
}
}
impl Eq for sockaddr_nl {}
impl ::fmt::Debug for sockaddr_nl {
fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
f.debug_struct("sockaddr_nl")
.field("nl_len", &self.nl_len)
.field("nl_family", &self.nl_family)
.field("nl_pid", &self.nl_pid)
.field("nl_groups", &self.nl_groups)
.finish()
}
}
impl ::hash::Hash for sockaddr_nl {
fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
self.nl_len.hash(state);
self.nl_family.hash(state);
self.nl_pid.hash(state);
self.nl_groups.hash(state);
}
}

impl PartialEq for mq_attr {
fn eq(&self, other: &mq_attr) -> bool {
self.mq_flags == other.mq_flags &&
Expand Down Expand Up @@ -3183,6 +3219,104 @@ pub const SO_TS_MONOTONIC: ::c_int = 3;
pub const SO_TS_DEFAULT: ::c_int = SO_TS_REALTIME_MICRO;
pub const SO_TS_CLOCK_MAX: ::c_int = SO_TS_MONOTONIC;

/// netlink constants
// sys/socket.h
pub const AF_NETLINK: ::c_int = 38;
pub const PF_NETLINK: ::c_int = AF_NETLINK;

// netlink/netlink.h
pub const SOL_NETLINK: ::c_int = 270;
pub const NETLINK_ADD_MEMBERSHIP: ::c_int = 1;
pub const NETLINK_DROP_MEMBERSHIP: ::c_int = 2;
pub const NETLINK_PKTINFO: ::c_int = 3;
pub const NETLINK_BROADCAST_ERROR: ::c_int = 4;
pub const NETLINK_NO_ENOBUFS: ::c_int = 5;
pub const NETLINK_RX_RING: ::c_int = 6;
pub const NETLINK_TX_RING: ::c_int = 7;
pub const NETLINK_LISTEN_ALL_NSID: ::c_int = 8;
pub const NETLINK_LIST_MEMBERSHIPS: ::c_int = 9;
pub const NETLINK_CAP_ACK: ::c_int = 10;
pub const NETLINK_EXT_ACK: ::c_int = 11;
pub const NETLINK_GET_STRICT_CHK: ::c_int = 12;
//
pub const NLM_F_REQUEST: ::c_int = 0x01;
pub const NLM_F_MULTI: ::c_int = 0x02;
pub const NLM_F_ACK: ::c_int = 0x04;
pub const NLM_F_ECHO: ::c_int = 0x08;
pub const NLM_F_DUMP_INTR: ::c_int = 0x10;
pub const NLM_F_DUMP_FILTERED: ::c_int = 0x20;
//
pub const NLM_F_ROOT: ::c_int = 0x100;
pub const NLM_F_MATCH: ::c_int = 0x200;
pub const NLM_F_ATOMIC: ::c_int = 0x400;
pub const NLM_F_DUMP: ::c_int = NLM_F_ROOT | NLM_F_MATCH;
//
pub const NLM_F_REPLACE: ::c_int = 0x100;
pub const NLM_F_EXCL: ::c_int = 0x200;
pub const NLM_F_CREATE: ::c_int = 0x400;
pub const NLM_F_APPEND: ::c_int = 0x800;
//
pub const NLM_F_NONREC: ::c_int = 0x100;
//
pub const NLM_F_CAPPED: ::c_int = 0x100;
pub const NLM_F_ACK_TLVS: ::c_int = 0x200;
//
pub const NLMSG_NOOP: ::c_int = 0x1;
pub const NLMSG_ERROR: ::c_int = 0x2;
pub const NLMSG_DONE: ::c_int = 0x3;
pub const NLMSG_OVERRUN: ::c_int = 0x4;
//
pub const NETLINK_ROUTE: ::c_int = 0;
pub const NETLINK_UNUSED: ::c_int = 1;
pub const NETLINK_USERSOCK: ::c_int = 2;
pub const NETLINK_FIREWALL: ::c_int = 3;
pub const NETLINK_SOCK_DIAG: ::c_int = 4;
pub const NETLINK_NFLOG: ::c_int = 5;
pub const NETLINK_XFRM: ::c_int = 6;
pub const NETLINK_SELINUX: ::c_int = 7;
pub const NETLINK_ISCSI: ::c_int = 8;
pub const NETLINK_AUDIT: ::c_int = 9;
pub const NETLINK_FIB_LOOKUP: ::c_int = 10;
pub const NETLINK_CONNECTOR: ::c_int = 11;
pub const NETLINK_NETFILTER: ::c_int = 12;
pub const NETLINK_IP6_FW: ::c_int = 13;
pub const NETLINK_DNRTMSG: ::c_int = 14;
pub const NETLINK_KOBJECT_UEVENT: ::c_int = 15;
pub const NETLINK_GENERIC: ::c_int = 16;
//
const NL_ITEM_ALIGN_SIZE: ::c_int = 4; // mem::size_of::<u32>(); FIXME accept new dep?
pub const NLMSG_ALIGNTO: ::c_int = NL_ITEM_ALIGN_SIZE;

// netlink/netlink_generic.h
pub const CTRL_CMD_UNSPEC: ::c_int = 0;
pub const CTRL_CMD_NEWFAMILY: ::c_int = 1;
pub const CTRL_CMD_DELFAMILY: ::c_int = 2;
pub const CTRL_CMD_GETFAMILY: ::c_int = 3;
pub const CTRL_CMD_NEWOPS: ::c_int = 4;
pub const CTRL_CMD_DELOPS: ::c_int = 5;
pub const CTRL_CMD_GETOPS: ::c_int = 6;
pub const CTRL_CMD_NEWMCAST_GRP: ::c_int = 7;
pub const CTRL_CMD_DELMCAST_GRP: ::c_int = 8;
pub const CTRL_CMD_GETMCAST_GRP: ::c_int = 9;
pub const CTRL_CMD_GETPOLICY: ::c_int = 10;
//
pub const CTRL_ATTR_UNSPEC: ::c_int = 0;
pub const CTRL_ATTR_FAMILY_ID: ::c_int = 1;
pub const CTRL_ATTR_FAMILY_NAME: ::c_int = 2;
pub const CTRL_ATTR_VERSION: ::c_int = 3;
pub const CTRL_ATTR_HDRSIZE: ::c_int = 4;
pub const CTRL_ATTR_MAXATTR: ::c_int = 5;
pub const CTRL_ATTR_OPS: ::c_int = 6;
pub const CTRL_ATTR_MCAST_GROUPS: ::c_int = 7;
pub const CTRL_ATTR_POLICY: ::c_int = 8;
pub const CTRL_ATTR_OP_POLICY: ::c_int = 9;
pub const CTRL_ATTR_OP: ::c_int = 10;
//
pub const CTRL_ATTR_MCAST_GRP_UNSPEC: ::c_int = 0;
pub const CTRL_ATTR_MCAST_GRP_NAME: ::c_int = 1;
pub const CTRL_ATTR_MCAST_GRP_ID: ::c_int = 2;

pub const LOCAL_CREDS: ::c_int = 2;
pub const LOCAL_CREDS_PERSISTENT: ::c_int = 3;
pub const LOCAL_CONNWAIT: ::c_int = 4;
Expand Down

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