/
packetdump.rs
291 lines (272 loc) · 10.5 KB
/
packetdump.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
// Copyright (c) 2014, 2015 Robert Clipsham <robert@octarineparrot.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/// This example shows a basic packet logger using libpnet
extern crate pnet;
use pnet::datalink::{self, NetworkInterface};
use pnet::packet::arp::ArpPacket;
use pnet::packet::ethernet::{EtherTypes, EthernetPacket, MutableEthernetPacket};
use pnet::packet::icmp::{echo_reply, echo_request, IcmpPacket, IcmpTypes};
use pnet::packet::icmpv6::Icmpv6Packet;
use pnet::packet::ip::{IpNextHeaderProtocol, IpNextHeaderProtocols};
use pnet::packet::ipv4::Ipv4Packet;
use pnet::packet::ipv6::Ipv6Packet;
use pnet::packet::tcp::TcpPacket;
use pnet::packet::udp::UdpPacket;
use pnet::packet::Packet;
use pnet::util::MacAddr;
use std::env;
use std::io::{self, Write};
use std::net::IpAddr;
use std::process;
fn handle_udp_packet(interface_name: &str, source: IpAddr, destination: IpAddr, packet: &[u8]) {
let udp = UdpPacket::new(packet);
if let Some(udp) = udp {
println!(
"[{}]: UDP Packet: {}:{} > {}:{}; length: {}",
interface_name,
source,
udp.get_source(),
destination,
udp.get_destination(),
udp.get_length()
);
} else {
println!("[{}]: Malformed UDP Packet", interface_name);
}
}
fn handle_icmp_packet(interface_name: &str, source: IpAddr, destination: IpAddr, packet: &[u8]) {
let icmp_packet = IcmpPacket::new(packet);
if let Some(icmp_packet) = icmp_packet {
match icmp_packet.get_icmp_type() {
IcmpTypes::EchoReply => {
let echo_reply_packet = echo_reply::EchoReplyPacket::new(packet).unwrap();
println!(
"[{}]: ICMP echo reply {} -> {} (seq={:?}, id={:?})",
interface_name,
source,
destination,
echo_reply_packet.get_sequence_number(),
echo_reply_packet.get_identifier()
);
}
IcmpTypes::EchoRequest => {
let echo_request_packet = echo_request::EchoRequestPacket::new(packet).unwrap();
println!(
"[{}]: ICMP echo request {} -> {} (seq={:?}, id={:?})",
interface_name,
source,
destination,
echo_request_packet.get_sequence_number(),
echo_request_packet.get_identifier()
);
}
_ => println!(
"[{}]: ICMP packet {} -> {} (type={:?})",
interface_name,
source,
destination,
icmp_packet.get_icmp_type()
),
}
} else {
println!("[{}]: Malformed ICMP Packet", interface_name);
}
}
fn handle_icmpv6_packet(interface_name: &str, source: IpAddr, destination: IpAddr, packet: &[u8]) {
let icmpv6_packet = Icmpv6Packet::new(packet);
if let Some(icmpv6_packet) = icmpv6_packet {
println!(
"[{}]: ICMPv6 packet {} -> {} (type={:?})",
interface_name,
source,
destination,
icmpv6_packet.get_icmpv6_type()
)
} else {
println!("[{}]: Malformed ICMPv6 Packet", interface_name);
}
}
fn handle_tcp_packet(interface_name: &str, source: IpAddr, destination: IpAddr, packet: &[u8]) {
let tcp = TcpPacket::new(packet);
if let Some(tcp) = tcp {
println!(
"[{}]: TCP Packet: {}:{} > {}:{}; length: {}",
interface_name,
source,
tcp.get_source(),
destination,
tcp.get_destination(),
packet.len()
);
} else {
println!("[{}]: Malformed TCP Packet", interface_name);
}
}
fn handle_transport_protocol(
interface_name: &str,
source: IpAddr,
destination: IpAddr,
protocol: IpNextHeaderProtocol,
packet: &[u8],
) {
match protocol {
IpNextHeaderProtocols::Udp => {
handle_udp_packet(interface_name, source, destination, packet)
}
IpNextHeaderProtocols::Tcp => {
handle_tcp_packet(interface_name, source, destination, packet)
}
IpNextHeaderProtocols::Icmp => {
handle_icmp_packet(interface_name, source, destination, packet)
}
IpNextHeaderProtocols::Icmpv6 => {
handle_icmpv6_packet(interface_name, source, destination, packet)
}
_ => println!(
"[{}]: Unknown {} packet: {} > {}; protocol: {:?} length: {}",
interface_name,
match source {
IpAddr::V4(..) => "IPv4",
_ => "IPv6",
},
source,
destination,
protocol,
packet.len()
),
}
}
fn handle_ipv4_packet(interface_name: &str, ethernet: &EthernetPacket) {
let header = Ipv4Packet::new(ethernet.payload());
if let Some(header) = header {
handle_transport_protocol(
interface_name,
IpAddr::V4(header.get_source()),
IpAddr::V4(header.get_destination()),
header.get_next_level_protocol(),
header.payload(),
);
} else {
println!("[{}]: Malformed IPv4 Packet", interface_name);
}
}
fn handle_ipv6_packet(interface_name: &str, ethernet: &EthernetPacket) {
let header = Ipv6Packet::new(ethernet.payload());
if let Some(header) = header {
handle_transport_protocol(
interface_name,
IpAddr::V6(header.get_source()),
IpAddr::V6(header.get_destination()),
header.get_next_header(),
header.payload(),
);
} else {
println!("[{}]: Malformed IPv6 Packet", interface_name);
}
}
fn handle_arp_packet(interface_name: &str, ethernet: &EthernetPacket) {
let header = ArpPacket::new(ethernet.payload());
if let Some(header) = header {
println!(
"[{}]: ARP packet: {}({}) > {}({}); operation: {:?}",
interface_name,
ethernet.get_source(),
header.get_sender_proto_addr(),
ethernet.get_destination(),
header.get_target_proto_addr(),
header.get_operation()
);
} else {
println!("[{}]: Malformed ARP Packet", interface_name);
}
}
fn handle_ethernet_frame(interface: &NetworkInterface, ethernet: &EthernetPacket) {
let interface_name = &interface.name[..];
match ethernet.get_ethertype() {
EtherTypes::Ipv4 => handle_ipv4_packet(interface_name, ethernet),
EtherTypes::Ipv6 => handle_ipv6_packet(interface_name, ethernet),
EtherTypes::Arp => handle_arp_packet(interface_name, ethernet),
_ => println!(
"[{}]: Unknown packet: {} > {}; ethertype: {:?} length: {}",
interface_name,
ethernet.get_source(),
ethernet.get_destination(),
ethernet.get_ethertype(),
ethernet.packet().len()
),
}
}
fn main() {
use pnet::datalink::Channel::Ethernet;
let iface_name = match env::args().nth(1) {
Some(n) => n,
None => {
writeln!(io::stderr(), "USAGE: packetdump <NETWORK INTERFACE>").unwrap();
process::exit(1);
}
};
let interface_names_match = |iface: &NetworkInterface| iface.name == iface_name;
// Find the network interface with the provided name
let interfaces = datalink::interfaces();
let interface = interfaces
.into_iter()
.filter(interface_names_match)
.next()
.unwrap_or_else(|| panic!("No such network interface: {}", iface_name));
// Create a channel to receive on
let (_, mut rx) = match datalink::channel(&interface, Default::default()) {
Ok(Ethernet(tx, rx)) => (tx, rx),
Ok(_) => panic!("packetdump: unhandled channel type"),
Err(e) => panic!("packetdump: unable to create channel: {}", e),
};
loop {
let mut buf: [u8; 1600] = [0u8; 1600];
let mut fake_ethernet_frame = MutableEthernetPacket::new(&mut buf[..]).unwrap();
match rx.next() {
Ok(packet) => {
let payload_offset;
if cfg!(any(target_os = "macos", target_os = "ios"))
&& interface.is_up()
&& !interface.is_broadcast()
&& ((!interface.is_loopback() && interface.is_point_to_point())
|| interface.is_loopback())
{
if interface.is_loopback() {
// The pnet code for BPF loopback adds a zero'd out Ethernet header
payload_offset = 14;
} else {
// Maybe is TUN interface
payload_offset = 0;
}
if packet.len() > payload_offset {
let version = Ipv4Packet::new(&packet[payload_offset..])
.unwrap()
.get_version();
if version == 4 {
fake_ethernet_frame.set_destination(MacAddr(0, 0, 0, 0, 0, 0));
fake_ethernet_frame.set_source(MacAddr(0, 0, 0, 0, 0, 0));
fake_ethernet_frame.set_ethertype(EtherTypes::Ipv4);
fake_ethernet_frame.set_payload(&packet[payload_offset..]);
handle_ethernet_frame(&interface, &fake_ethernet_frame.to_immutable());
continue;
} else if version == 6 {
fake_ethernet_frame.set_destination(MacAddr(0, 0, 0, 0, 0, 0));
fake_ethernet_frame.set_source(MacAddr(0, 0, 0, 0, 0, 0));
fake_ethernet_frame.set_ethertype(EtherTypes::Ipv6);
fake_ethernet_frame.set_payload(&packet[payload_offset..]);
handle_ethernet_frame(&interface, &fake_ethernet_frame.to_immutable());
continue;
}
}
}
handle_ethernet_frame(&interface, &EthernetPacket::new(packet).unwrap());
}
Err(e) => panic!("packetdump: unable to receive packet: {}", e),
}
}
}