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Implemented BroadcastAddress option, RenewalTime option and RebindingTime option. Ran cargo fmt

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This commit is contained in:
Xnoe 2022-10-30 14:50:59 +00:00
parent 855b09e580
commit 27b8836f74
Signed by: xnoe
GPG Key ID: 45AC398F44F0DAFE
3 changed files with 263 additions and 131 deletions
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317
src/main.rs
View File

@ -1,5 +1,5 @@
pub mod rtnetlink;
pub mod rawsocket;
pub mod rtnetlink;
use eui48::MacAddress;
use rand::prelude::*;
@ -58,7 +58,7 @@ enum DHCPTransactionState {
WaitingAfterDiscover,
Request,
WaitAfterRequest,
Renew
Renew,
}
fn pick_weighted<T>(list: &Vec<T>) -> Option<&T> {
@ -66,18 +66,14 @@ fn pick_weighted<T>(list: &Vec<T>) -> Option<&T> {
let mut rng = rand::thread_rng();
let mut prob = rng.gen_range(0f64..=1f64);
println!("start prob={}", prob);
for (idx, elem) in list.iter().enumerate() {
let weight = 1f64 / (2 as usize).pow(idx as u32 + (len != idx + 1) as u32) as f64;
prob -= weight;
println!("len={} idx={}: weight={}, prob={}", len, idx, weight, prob);
if prob <= 0.0 {
return Some(elem);
}
}
// fallback in case of float rounding errors i suppose
@ -85,7 +81,9 @@ fn pick_weighted<T>(list: &Vec<T>) -> Option<&T> {
}
fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
unsafe { libc::sleep(5); }
unsafe {
libc::sleep(5);
}
let mut name = name;
let mut socket_nl = rtnetlink::create_netlink_socket(false).unwrap();
let mut rng = rand::thread_rng();
@ -120,65 +118,78 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
DHCPOption::End,
],
)
.as_bytes()
.as_bytes(),
) {
Ok(_) => break,
Err(libc::ENETDOWN) => {
unsafe {
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::ifinfomsg}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWLINK;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST) as u16;
request.b.ifi_index = index;
request.b.ifi_flags = libc::IFF_UP as u32;
request.b.ifi_change = 1;
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
Err(libc::ENETDOWN) => unsafe {
{
#[repr(packed)]
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::ifinfomsg,
}
let mut request = std::mem::zeroed::<Request>();
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::ifinfomsg}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWLINK;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST) as u16;
request.b.ifi_index = index;
request.b.ifi_flags = libc::IFF_UP as u32;
request.b.ifi_change = 1;
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_GETLINK;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST) as u16;
request.b.ifi_index = index;
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
let mut buffer = [0; 4096];
socket_nl.recv(&mut buffer).unwrap();
let nlmsghdr = &buffer as *const _ as *const libc::nlmsghdr;
if (*nlmsghdr).nlmsg_type != libc::RTM_NEWLINK {
panic!("Wrong message!");
}
let mut n = (*nlmsghdr).nlmsg_len - std::mem::size_of::<libc::nlmsghdr>() as u32 - std::mem::size_of::<rtnetlink::ifinfomsg>() as u32;
let mut rtattr = (&buffer as *const _ as *const u8).offset(std::mem::size_of::<libc::nlmsghdr>() as isize + std::mem::size_of::<rtnetlink::ifinfomsg>() as isize) as *const rtnetlink::rtattr;
while rtnetlink::rta_ok(rtattr, &mut n) {
match (*rtattr).rta_type {
libc::IFLA_IFNAME => {
name = zascii(&std::ptr::read(rtnetlink::rta_data(rtattr) as *const _ as *const [libc::c_char; libc::IFNAMSIZ]));
}
_ => ()
}
rtattr = rtnetlink::rta_next(rtattr, &mut n);
}
}
libc::sleep(10);
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
}
}
Err(_) => panic!("Failed to send on {}", name)
{
#[repr(packed)]
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::ifinfomsg,
}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_GETLINK;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST) as u16;
request.b.ifi_index = index;
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
let mut buffer = [0; 4096];
socket_nl.recv(&mut buffer).unwrap();
let nlmsghdr = &buffer as *const _ as *const libc::nlmsghdr;
if (*nlmsghdr).nlmsg_type != libc::RTM_NEWLINK {
panic!("Wrong message!");
}
let mut n = (*nlmsghdr).nlmsg_len
- std::mem::size_of::<libc::nlmsghdr>() as u32
- std::mem::size_of::<rtnetlink::ifinfomsg>() as u32;
let mut rtattr = (&buffer as *const _ as *const u8).offset(
std::mem::size_of::<libc::nlmsghdr>() as isize
+ std::mem::size_of::<rtnetlink::ifinfomsg>() as isize,
)
as *const rtnetlink::rtattr;
while rtnetlink::rta_ok(rtattr, &mut n) {
match (*rtattr).rta_type {
libc::IFLA_IFNAME => {
name = zascii(&std::ptr::read(
rtnetlink::rta_data(rtattr) as *const _
as *const [libc::c_char; libc::IFNAMSIZ],
));
}
_ => (),
}
rtattr = rtnetlink::rta_next(rtattr, &mut n);
}
}
libc::sleep(10);
},
Err(_) => panic!("Failed to send on {}", name),
}
}
dhcp_state = DHCPTransactionState::WaitingAfterDiscover;
@ -246,22 +257,24 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
DHCPTransactionState::Request => {
println!("Sent DHCPRequest on {}", name);
socket.send(
create_dhcp_packet(
xid,
client_mac,
None,
None,
vec![
DHCPOption::DHCPMessageType(DHCPMessageType::DHCPRequest),
DHCPOption::RequestIPAddress(client_addr.unwrap()),
DHCPOption::ServerIdentifier(server_addr.unwrap()),
DHCPOption::ParameterRequest(vec![1, 3, 6, 28, 121]),
DHCPOption::End,
],
socket
.send(
create_dhcp_packet(
xid,
client_mac,
None,
None,
vec![
DHCPOption::DHCPMessageType(DHCPMessageType::DHCPRequest),
DHCPOption::RequestIPAddress(client_addr.unwrap()),
DHCPOption::ServerIdentifier(server_addr.unwrap()),
DHCPOption::ParameterRequest(vec![1, 3, 6, 28, 121]),
DHCPOption::End,
],
)
.as_bytes(),
)
.as_bytes()
).unwrap();
.unwrap();
dhcp_state = DHCPTransactionState::WaitAfterRequest;
}
@ -308,10 +321,14 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
}
let mut sleep_time = 0;
let mut subnet_mask = Ipv4Addr::new(0,0,0,0);
let mut subnet_mask = Ipv4Addr::new(0, 0, 0, 0);
let mut router = Vec::new();
let mut dns = Vec::new();
let mut classless_static_routes = Vec::new();
let mut broadcast = None;
let mut renew_time = None;
let mut rebind_time = None;
for option in options {
println!("Received: {:?}", option);
@ -323,6 +340,10 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
DHCPOption::DomainNameServer(v) => dns = v,
DHCPOption::ClasslessStaticRoute(v) => classless_static_routes = v,
DHCPOption::RenewalTime(t) => renew_time = Some(t),
DHCPOption::RebindingTime(t) => rebind_time = Some(t),
DHCPOption::BroadcastAddress(a) => broadcast = Some(a),
_ => (),
}
}
@ -330,38 +351,73 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
unsafe {
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::ifaddrmsg, c: rtnetlink::rtattr, d: [u8; 4], e: rtnetlink::rtattr, f: [u8; 4], g: rtnetlink::rtattr, h: rtnetlink::ifa_cacheinfo}
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::ifaddrmsg,
c: rtnetlink::rtattr,
d: [u8; 4],
e: rtnetlink::rtattr,
f: [u8; 4],
g: rtnetlink::rtattr,
h: rtnetlink::ifa_cacheinfo,
}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWADDR;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST | libc::NLM_F_CREATE | libc::NLM_F_REPLACE) as u16;
request.a.nlmsg_flags =
(libc::NLM_F_REQUEST | libc::NLM_F_CREATE | libc::NLM_F_REPLACE)
as u16;
request.b.ifa_family = libc::AF_INET as u8;
request.b.ifa_index = index;
request.b.ifa_prefixlen = u32::from(subnet_mask).leading_ones() as u8;
request.c.rta_type = libc::IFA_LOCAL;
request.c.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.c.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.d = client_addr.unwrap().octets();
request.e.rta_type = libc::IFA_BROADCAST;
request.e.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.f = ((u32::from(client_addr.unwrap()) & u32::from(subnet_mask)) | (!u32::from(subnet_mask))).to_be_bytes();
request.e.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
if let Some(broadcast) = broadcast {
request.f = broadcast.octets();
} else {
request.f = ((u32::from(client_addr.unwrap())
& u32::from(subnet_mask))
| (!u32::from(subnet_mask)))
.to_be_bytes();
}
request.g.rta_type = libc::IFA_CACHEINFO;
request.g.rta_len = std::mem::size_of::<(rtnetlink::rtattr, rtnetlink::ifa_cacheinfo)>() as u16;
request.h.ifa_preferred = (sleep_time as f32 * 0.5) as u32;
request.h.ifa_valid = (sleep_time as f32 * 0.875) as u32;
request.g.rta_len = std::mem::size_of::<(
rtnetlink::rtattr,
rtnetlink::ifa_cacheinfo,
)>() as u16;
request.h.ifa_preferred =
renew_time.unwrap_or((sleep_time as f32 * 0.5) as u32);
request.h.ifa_valid =
rebind_time.unwrap_or((sleep_time as f32 * 0.875) as u32);
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
}
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::rtmsg, c: rtnetlink::rtattr, d: [u8; 4], e: rtnetlink::rtattr, f: libc::c_int, g: rtnetlink::rtattr, h: rtnetlink::rta_cacheinfo}
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::rtmsg,
c: rtnetlink::rtattr,
d: [u8; 4],
e: rtnetlink::rtattr,
f: libc::c_int,
g: rtnetlink::rtattr,
h: rtnetlink::rta_cacheinfo,
}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWROUTE;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.a.nlmsg_flags =
(libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.b.rtm_family = libc::AF_INET as u8;
request.b.rtm_table = libc::RT_TABLE_MAIN;
request.b.rtm_type = libc::RTN_UNICAST;
@ -369,27 +425,43 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
request.b.rtm_scope = libc::RT_SCOPE_LINK;
request.b.rtm_dst_len = u32::from(subnet_mask).leading_ones() as u8;
request.c.rta_type = libc::RTA_DST;
request.c.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.c.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.d = client_addr.unwrap().octets();
request.e.rta_type = libc::RTA_OIF;
request.e.rta_len = std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.e.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.f = index;
request.g.rta_type = libc::RTA_CACHEINFO;
request.g.rta_len = std::mem::size_of::<(rtnetlink::rtattr, rtnetlink::rta_cacheinfo)>() as u16;
request.h.rta_expires = (sleep_time as f32 * 0.875) as u32;
request.g.rta_len = std::mem::size_of::<(
rtnetlink::rtattr,
rtnetlink::rta_cacheinfo,
)>() as u16;
request.h.rta_expires =
rebind_time.unwrap_or((sleep_time as f32 * 0.875) as u32);
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
}
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::rtmsg, c: rtnetlink::rtattr, d: [u8; 4], e: rtnetlink::rtattr, f: libc::c_int, g: rtnetlink::rtattr, h: rtnetlink::rta_cacheinfo}
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::rtmsg,
c: rtnetlink::rtattr,
d: [u8; 4],
e: rtnetlink::rtattr,
f: libc::c_int,
g: rtnetlink::rtattr,
h: rtnetlink::rta_cacheinfo,
}
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWROUTE;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.a.nlmsg_flags =
(libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.b.rtm_family = libc::AF_INET as u8;
request.b.rtm_table = libc::RT_TABLE_MAIN;
request.b.rtm_type = libc::RTN_UNICAST;
@ -397,28 +469,44 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
request.b.rtm_scope = libc::RT_SCOPE_UNIVERSE;
request.b.rtm_dst_len = 0;
request.c.rta_type = libc::RTA_GATEWAY;
request.c.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.c.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.d = pick_weighted(&router).unwrap().octets();
request.e.rta_type = libc::RTA_OIF;
request.e.rta_len = std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.e.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.f = index;
request.g.rta_type = libc::RTA_CACHEINFO;
request.g.rta_len = std::mem::size_of::<(rtnetlink::rtattr, rtnetlink::rta_cacheinfo)>() as u16;
request.h.rta_expires = (sleep_time as f32 * 0.875) as u32;
request.g.rta_len = std::mem::size_of::<(
rtnetlink::rtattr,
rtnetlink::rta_cacheinfo,
)>() as u16;
request.h.rta_expires =
rebind_time.unwrap_or((sleep_time as f32 * 0.875) as u32);
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
}
{
#[repr(packed)]
struct Request {a: libc::nlmsghdr, b: rtnetlink::rtmsg, c: rtnetlink::rtattr, d: [u8; 4], e: rtnetlink::rtattr, f: [u8; 4], g: rtnetlink::rtattr, h: libc::c_int}
struct Request {
a: libc::nlmsghdr,
b: rtnetlink::rtmsg,
c: rtnetlink::rtattr,
d: [u8; 4],
e: rtnetlink::rtattr,
f: [u8; 4],
g: rtnetlink::rtattr,
h: libc::c_int,
}
for (prefix, prefix_len, router) in classless_static_routes {
let mut request = std::mem::zeroed::<Request>();
request.a.nlmsg_len = std::mem::size_of::<Request>() as u32;
request.a.nlmsg_type = libc::RTM_NEWROUTE;
request.a.nlmsg_flags = (libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.a.nlmsg_flags =
(libc::NLM_F_REQUEST | libc::NLM_F_CREATE) as u16;
request.b.rtm_family = libc::AF_INET as u8;
request.b.rtm_table = libc::RT_TABLE_MAIN;
request.b.rtm_type = libc::RTN_UNICAST;
@ -426,29 +514,44 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
request.b.rtm_scope = libc::RT_SCOPE_UNIVERSE;
request.b.rtm_dst_len = prefix_len;
request.c.rta_type = libc::RTA_DST;
request.c.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.c.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.d = prefix.octets();
request.e.rta_type = libc::RTA_GATEWAY;
request.e.rta_len = std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.e.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, [u8; 4])>() as u16;
request.f = router.octets();
request.g.rta_type = libc::RTA_OIF;
request.g.rta_len = std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.g.rta_len =
std::mem::size_of::<(rtnetlink::rtattr, libc::c_int)>() as u16;
request.h = index;
socket_nl.send(rtnetlink::to_slice(&request)).unwrap();
}
}
let mut f = std::fs::OpenOptions::new().write(true).truncate(true).open("/etc/resolv.conf").unwrap();
let mut f = std::fs::OpenOptions::new()
.write(true)
.truncate(true)
.open("/etc/resolv.conf")
.unwrap();
for server in dns {
f.write_all(("nameserver ".to_string() + &server.to_string() + "\n").as_bytes()).unwrap();
f.write_all(
("nameserver ".to_string() + &server.to_string() + "\n").as_bytes(),
)
.unwrap();
}
f.flush().unwrap();
}
println!("Sleeping for {} for lease time to elapse.", (sleep_time as f32 * 0.5) as u32);
std::thread::sleep(core::time::Duration::new((sleep_time as f32 * 0.5) as u64, 0));
println!(
"Sleeping for {} for lease time to elapse.",
renew_time.unwrap_or((sleep_time as f32 * 0.5) as u32)
);
std::thread::sleep(core::time::Duration::new(
renew_time.unwrap_or((sleep_time as f32 * 0.5) as u32) as u64,
0,
));
dhcp_state = DHCPTransactionState::Renew
}
@ -466,7 +569,7 @@ fn dhcp_client(name: String, index: i32, mac: [u8; 6]) {
DHCPOption::End,
],
)
.as_bytes()
.as_bytes(),
);
dhcp_state = DHCPTransactionState::WaitAfterRequest;
}

41
src/rawsocket.rs
View File

@ -8,7 +8,7 @@ pub struct RawSocket {
socket: libc::c_int,
src_addr: libc::sockaddr_ll,
dest_addr: libc::sockaddr_ll,
if_index: i32
if_index: i32,
}
pub fn create_raw_socket(index: i32, mac: [u8; 6]) -> Result<RawSocket, &'static str> {
@ -42,15 +42,34 @@ pub fn create_raw_socket(index: i32, mac: [u8; 6]) -> Result<RawSocket, &'static
let mut timeval = std::mem::zeroed::<libc::timeval>();
timeval.tv_sec = 30;
if libc::setsockopt(socket, libc::SOL_SOCKET, libc::SO_RCVTIMEO, &timeval as *const _ as *const libc::c_void, std::mem::size_of::<libc::timeval>() as u32) == -1 {
if libc::setsockopt(
socket,
libc::SOL_SOCKET,
libc::SO_RCVTIMEO,
&timeval as *const _ as *const libc::c_void,
std::mem::size_of::<libc::timeval>() as u32,
) == -1
{
return Err("Failed to set SO_RCVTIMEO");
}
if libc::setsockopt(socket, libc::SOL_SOCKET, libc::SO_BROADCAST, &(1 as u32) as *const _ as *const libc::c_void, std::mem::size_of::<u32>() as u32) == -1 {
return Err("Failed to set SO_BROADCAST")
if libc::setsockopt(
socket,
libc::SOL_SOCKET,
libc::SO_BROADCAST,
&(1 as u32) as *const _ as *const libc::c_void,
std::mem::size_of::<u32>() as u32,
) == -1
{
return Err("Failed to set SO_BROADCAST");
}
if libc::bind(socket, &src_addr as *const _ as *const libc::sockaddr, std::mem::size_of::<libc::sockaddr_ll>() as u32) == -1 {
if libc::bind(
socket,
&src_addr as *const _ as *const libc::sockaddr,
std::mem::size_of::<libc::sockaddr_ll>() as u32,
) == -1
{
return Err("Failed to bind to socket");
}
}
@ -59,7 +78,7 @@ pub fn create_raw_socket(index: i32, mac: [u8; 6]) -> Result<RawSocket, &'static
socket: socket,
src_addr: src_addr,
dest_addr: dest_addr,
if_index: index
if_index: index,
})
}
@ -100,10 +119,16 @@ impl RawSocket {
if n < 0 {
match unsafe { *libc::__errno_location() } {
libc::EAGAIN => return Ok((0, [0, 0, 0, 0, 0, 0])),
err => return Err(err)
err => return Err(err),
}
} else {
return Ok((n, unsafe { std::ptr::read(msg.msg_name as *mut _ as *mut libc::sockaddr_ll) }.sll_addr[..6].try_into().unwrap()));
return Ok((
n,
unsafe { std::ptr::read(msg.msg_name as *mut _ as *mut libc::sockaddr_ll) }
.sll_addr[..6]
.try_into()
.unwrap(),
));
}
}

20
src/rtnetlink.rs
View File

@ -155,7 +155,7 @@ unsafe fn ifla_rta(r: *const ifinfomsg) -> *const rtattr {
pub struct Socket {
socket: libc::c_int,
src_addr: libc::sockaddr_nl,
dest_addr: libc::sockaddr_nl
dest_addr: libc::sockaddr_nl,
}
pub fn create_netlink_socket(subscribed: bool) -> Result<Socket, &'static str> {
@ -177,7 +177,12 @@ pub fn create_netlink_socket(subscribed: bool) -> Result<Socket, &'static str> {
return Err("Failed to create socket");
}
if libc::bind(socket, &src_addr as *const _ as *const libc::sockaddr, std::mem::size_of::<libc::sockaddr_nl>() as u32) == -1 {
if libc::bind(
socket,
&src_addr as *const _ as *const libc::sockaddr,
std::mem::size_of::<libc::sockaddr_nl>() as u32,
) == -1
{
return Err("Failed to bind to socket");
}
}
@ -185,7 +190,7 @@ pub fn create_netlink_socket(subscribed: bool) -> Result<Socket, &'static str> {
Ok(Socket {
socket: socket,
src_addr: src_addr,
dest_addr: dest_addr
dest_addr: dest_addr,
})
}
@ -239,10 +244,7 @@ pub struct InterfaceIterator {
}
pub unsafe fn to_slice<T: Sized>(p: &T) -> &[u8] {
std::slice::from_raw_parts(
(p as *const T) as *const u8,
std::mem::size_of::<T>(),
)
std::slice::from_raw_parts((p as *const T) as *const u8, std::mem::size_of::<T>())
}
pub fn new_interface_iterator() -> Result<InterfaceIterator, &'static str> {
@ -254,7 +256,9 @@ pub fn new_interface_iterator() -> Result<InterfaceIterator, &'static str> {
request.0.nlmsg_flags = (libc::NLM_F_REQUEST | libc::NLM_F_DUMP) as u16;
request.1.ifi_family = libc::AF_NETLINK as u8;
socket.send(unsafe {to_slice(&request)}).expect("Failed to send interface request!");
socket
.send(unsafe { to_slice(&request) })
.expect("Failed to send interface request!");
Ok(InterfaceIterator {
socket: socket,