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Remove the old session-based tunnel analyzers

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This commit is contained in:
Tim Wojtulewicz 2021-11-03 15:51:00 -07:00
parent 2044fbe53b
commit 9135345fa8
31 changed files with 0 additions and 2502 deletions
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5
src/analyzer/protocol/CMakeLists.txt
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@ -1,4 +1,3 @@
#add_subdirectory(ayiya)
add_subdirectory(bittorrent)
add_subdirectory(conn-size)
add_subdirectory(dce-rpc)
@ -8,10 +7,8 @@ add_subdirectory(dns)
add_subdirectory(file)
add_subdirectory(finger)
add_subdirectory(ftp)
#add_subdirectory(geneve)
add_subdirectory(gnutella)
add_subdirectory(gssapi)
#add_subdirectory(gtpv1)
add_subdirectory(http)
add_subdirectory(ident)
add_subdirectory(imap)
@ -41,7 +38,5 @@ add_subdirectory(ssh)
add_subdirectory(ssl)
add_subdirectory(syslog)
add_subdirectory(tcp)
#add_subdirectory(teredo)
#add_subdirectory(vxlan)
add_subdirectory(xmpp)
add_subdirectory(zip)

71
src/analyzer/protocol/ayiya/AYIYA.cc
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@ -1,71 +0,0 @@
// See the file "COPYING" in the main distribution directory for copyright.
#include "zeek/analyzer/protocol/ayiya/AYIYA.h"
#include "zeek/Func.h"
#include "zeek/packet_analysis/protocol/ip/IP.h"
#include "zeek/packet_analysis/protocol/iptunnel/IPTunnel.h"
namespace zeek::analyzer::ayiya
{
AYIYA_Analyzer::AYIYA_Analyzer(Connection* conn) : Analyzer("AYIYA", conn)
{
interp = new binpac::AYIYA::AYIYA_Conn(this);
}
AYIYA_Analyzer::~AYIYA_Analyzer()
{
delete interp;
}
void AYIYA_Analyzer::Done()
{
Analyzer::Done();
Event(udp_session_done);
}
void AYIYA_Analyzer::DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen)
{
Analyzer::DeliverPacket(len, data, orig, seq, ip, caplen);
try
{
interp->NewData(orig, data, data + len);
}
catch ( const binpac::Exception& e )
{
AnalyzerViolation(util::fmt("Binpac exception: %s", e.c_msg()));
}
if ( inner_packet_offset <= 0 )
return;
data += inner_packet_offset;
len -= inner_packet_offset;
caplen -= inner_packet_offset;
inner_packet_offset = -1;
std::shared_ptr<IP_Hdr> inner;
int result = packet_analysis::IP::ParsePacket(len, data, next_header, inner);
if ( result == 0 )
{
AnalyzerConfirmation();
std:
shared_ptr<EncapsulationStack> e = Conn()->GetEncapsulation();
EncapsulatingConn ec(Conn(), BifEnum::Tunnel::AYIYA);
packet_analysis::IPTunnel::ip_tunnel_analyzer->ProcessEncapsulatedPacket(
run_state::network_time, nullptr, inner, e, ec);
}
else if ( result == -2 )
AnalyzerViolation("AYIYA next header internal mismatch",
reinterpret_cast<const char*>(data), len);
else if ( result < 0 )
AnalyzerViolation("Truncated AYIYA", reinterpret_cast<const char*>(data), len);
else
AnalyzerViolation("AYIYA payload length", reinterpret_cast<const char*>(data), len);
}
} // namespace zeek::analyzer::ayiya

37
src/analyzer/protocol/ayiya/AYIYA.h
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@ -1,37 +0,0 @@
#pragma once
#include "analyzer/protocol/ayiya/ayiya_pac.h"
namespace binpac::AYIYA
{
class AYIYA_Conn;
}
namespace zeek::analyzer::ayiya
{
class AYIYA_Analyzer final : public analyzer::Analyzer
{
public:
explicit AYIYA_Analyzer(Connection* conn);
virtual ~AYIYA_Analyzer();
virtual void Done();
virtual void DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen);
static analyzer::Analyzer* Instantiate(Connection* conn) { return new AYIYA_Analyzer(conn); }
void SetInnerInfo(int offset, uint8_t next)
{
inner_packet_offset = offset;
next_header = next;
}
protected:
binpac::AYIYA::AYIYA_Conn* interp;
int inner_packet_offset = -1;
uint8_t next_header = 0;
};
} // namespace zeek::analyzer::ayiya

9
src/analyzer/protocol/ayiya/CMakeLists.txt
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@ -1,9 +0,0 @@
include(ZeekPlugin)
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
zeek_plugin_begin(Zeek AYIYA)
zeek_plugin_cc(AYIYA.cc Plugin.cc)
zeek_plugin_pac(ayiya.pac ayiya-protocol.pac ayiya-analyzer.pac)
zeek_plugin_end()

26
src/analyzer/protocol/ayiya/Plugin.cc
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@ -1,26 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/plugin/Plugin.h"
#include "zeek/analyzer/Component.h"
#include "zeek/analyzer/protocol/ayiya/AYIYA.h"
namespace zeek::plugin::detail::Zeek_AYIYA
{
class Plugin : public zeek::plugin::Plugin
{
public:
zeek::plugin::Configuration Configure() override
{
AddComponent(new zeek::analyzer::Component(
"AYIYA", zeek::analyzer::ayiya::AYIYA_Analyzer::Instantiate));
zeek::plugin::Configuration config;
config.name = "Zeek::AYIYA";
config.description = "AYIYA Analyzer";
return config;
}
} plugin;
} // namespace zeek::plugin::detail::Zeek_AYIYA

68
src/analyzer/protocol/ayiya/ayiya-analyzer.pac
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@ -1,68 +0,0 @@
%extern{
#include "zeek/Conn.h"
#include "zeek/analyzer/protocol/ayiya/AYIYA.h"
%}
connection AYIYA_Conn(zeek_analyzer: ZeekAnalyzer)
{
upflow = AYIYA_Flow;
downflow = AYIYA_Flow;
};
flow AYIYA_Flow
{
datagram = PDU withcontext(connection, this);
function process_ayiya(pdu: PDU): bool
%{
zeek::Connection* c = connection()->zeek_analyzer()->Conn();
std:shared_ptr<zeek::EncapsulationStack> e = c->GetEncapsulation();
if ( e && e->Depth() >= zeek::BifConst::Tunnel::max_depth )
{
connection()->zeek_analyzer()->Weird("tunnel_depth");
return false;
}
if ( ${pdu.op} != 1 )
{
// 1 is the "forward" command.
return false;
}
if ( ${pdu.next_header} != IPPROTO_IPV6 &&
${pdu.next_header} != IPPROTO_IPV4 )
{
connection()->zeek_analyzer()->Weird("ayiya_tunnel_non_ip");
return false;
}
if ( ${pdu.packet}.length() < (int)sizeof(struct ip) )
{
connection()->zeek_analyzer()->AnalyzerViolation(
"Truncated AYIYA", (const char*) ${pdu.packet}.data(),
${pdu.packet}.length());
return false;
}
const struct ip* ip = (const struct ip*) ${pdu.packet}.data();
if ( ( ${pdu.next_header} == IPPROTO_IPV6 && ip->ip_v != 6 ) ||
( ${pdu.next_header} == IPPROTO_IPV4 && ip->ip_v != 4) )
{
connection()->zeek_analyzer()->AnalyzerViolation(
"AYIYA next header mismatch", (const char*)${pdu.packet}.data(),
${pdu.packet}.length());
return false;
}
static_cast<zeek::analyzer::ayiya::AYIYA_Analyzer*>(connection()->zeek_analyzer())->SetInnerInfo(${pdu.hdr_len}, ${pdu.next_header});
return true;
%}
};
refine typeattr PDU += &let {
proc_ayiya = $context.flow.process_ayiya(this);
};

17
src/analyzer/protocol/ayiya/ayiya-protocol.pac
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@ -1,17 +0,0 @@
type PDU = record {
identity_byte: uint8;
signature_byte: uint8;
auth_and_op: uint8;
next_header: uint8;
epoch: uint32;
identity: bytestring &length=identity_len;
signature: bytestring &length=signature_len;
packet: bytestring &restofdata;
} &let {
identity_len = (1 << (identity_byte >> 4));
signature_len = (signature_byte >> 4) * 4;
hdr_len = 8 + identity_len + signature_len;
auth = auth_and_op >> 4;
op = auth_and_op & 0xF;
} &byteorder = littleendian;

17
src/analyzer/protocol/ayiya/ayiya.pac
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@ -1,17 +0,0 @@
%include binpac.pac
%include zeek.pac
%extern{
#include "zeek/IP.h"
#include "zeek/Reporter.h"
#include "zeek/TunnelEncapsulation.h"
%}
analyzer AYIYA withcontext {
connection: AYIYA_Conn;
flow: AYIYA_Flow;
};
%include ayiya-protocol.pac
%include ayiya-analyzer.pac

8
src/analyzer/protocol/geneve/CMakeLists.txt
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@ -1,8 +0,0 @@
include(ZeekPlugin)
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
zeek_plugin_begin(Zeek Geneve)
zeek_plugin_cc(Geneve.cc Plugin.cc)
zeek_plugin_bif(events.bif)
zeek_plugin_end()

95
src/analyzer/protocol/geneve/Geneve.cc
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@ -1,95 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/analyzer/protocol/geneve/Geneve.h"
#include "zeek/Conn.h"
#include "zeek/IP.h"
#include "zeek/RunState.h"
#include "zeek/analyzer/protocol/geneve/events.bif.h"
#include "zeek/packet_analysis/protocol/iptunnel/IPTunnel.h"
namespace zeek::analyzer::geneve
{
void Geneve_Analyzer::Done()
{
Analyzer::Done();
Event(udp_session_done);
}
void Geneve_Analyzer::DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen)
{
Analyzer::DeliverPacket(len, data, orig, seq, ip, caplen);
// Outer Ethernet, IP, and UDP layers already skipped.
// Also, generic UDP analyzer already checked/guarantees caplen >= len.
constexpr auto tunnel_header_len = 8;
if ( len < tunnel_header_len )
{
AnalyzerViolation("Geneve header truncation", reinterpret_cast<const char*>(data), len);
return;
}
auto outer = Conn()->GetEncapsulation();
if ( outer && outer->Depth() >= BifConst::Tunnel::max_depth )
{
Weird("tunnel_depth");
return;
}
if ( ! outer )
outer = std::make_shared<EncapsulationStack>();
EncapsulatingConn inner(Conn(), BifEnum::Tunnel::GENEVE);
outer->Add(inner);
int encap_index = outer->Depth();
uint8_t tunnel_opt_len = (data[0] & 0x3F) * 4;
auto vni = (data[4] << 16) + (data[5] << 8) + (data[6] << 0);
if ( len < tunnel_header_len + tunnel_opt_len )
{
AnalyzerViolation("Geneve option header truncation", reinterpret_cast<const char*>(data),
len);
return;
}
// Skip over the Geneve headers and create a new packet.
data += tunnel_header_len + tunnel_opt_len;
caplen -= tunnel_header_len + tunnel_opt_len;
len -= tunnel_header_len + tunnel_opt_len;
pkt_timeval ts;
ts.tv_sec = static_cast<time_t>(run_state::current_timestamp);
ts.tv_usec = static_cast<suseconds_t>(
(run_state::current_timestamp - static_cast<double>(ts.tv_sec)) * 1000000);
Packet pkt(DLT_EN10MB, &ts, caplen, len, data);
pkt.encap = outer;
if ( ! packet_mgr->ProcessInnerPacket(&pkt) )
{
AnalyzerViolation("Geneve invalid inner packet");
return;
}
// This isn't really an error. It's just that the inner packet wasn't an IP packet (like ARP).
// Just return without reporting a violation.
if ( ! pkt.ip_hdr )
return;
AnalyzerConfirmation();
if ( geneve_packet )
{
EncapsulatingConn* ec = pkt.encap->At(encap_index);
if ( ec && ec->ip_hdr )
Conn()->EnqueueEvent(geneve_packet, nullptr, ConnVal(), pkt.ip_hdr->ToPktHdrVal(),
val_mgr->Count(vni));
}
}
} // namespace zeek::analyzer::geneve

23
src/analyzer/protocol/geneve/Geneve.h
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@ -1,23 +0,0 @@
// See the file in the main distribution directory for copyright.
#pragma once
#include "zeek/analyzer/Analyzer.h"
namespace zeek::analyzer::geneve
{
class Geneve_Analyzer final : public analyzer::Analyzer
{
public:
explicit Geneve_Analyzer(Connection* conn) : Analyzer("Geneve", conn) { }
void Done() override;
void DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq, const IP_Hdr* ip,
int caplen) override;
static analyzer::Analyzer* Instantiate(Connection* conn) { return new Geneve_Analyzer(conn); }
};
} // namespace zeek::analyzer::vxlan

26
src/analyzer/protocol/geneve/Plugin.cc
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@ -1,26 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/plugin/Plugin.h"
#include "zeek/analyzer/Component.h"
#include "zeek/analyzer/protocol/geneve/Geneve.h"
namespace zeek::plugin::detail::Zeek_Geneve
{
class Plugin : public zeek::plugin::Plugin
{
public:
zeek::plugin::Configuration Configure() override
{
AddComponent(new zeek::analyzer::Component(
"Geneve", zeek::analyzer::geneve::Geneve_Analyzer::Instantiate));
zeek::plugin::Configuration config;
config.name = "Zeek::Geneve";
config.description = "Geneve analyzer";
return config;
}
} plugin;
} // namespace zeek::plugin::detail::Zeek_Geneve

12
src/analyzer/protocol/geneve/events.bif
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@ -1,12 +0,0 @@
## Generated for any packet encapsulated in a Geneve tunnel.
## See :rfc:`8926` for more information about the VXLAN protocol.
##
## outer: The Geneve tunnel connection.
##
## inner: The Geneve-encapsulated Ethernet packet header and transport header.
##
## vni: Geneve Network Identifier.
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event geneve_packet%(outer: connection, inner: pkt_hdr, vni: count%);

10
src/analyzer/protocol/gtpv1/CMakeLists.txt
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@ -1,10 +0,0 @@
include(ZeekPlugin)
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
zeek_plugin_begin(Zeek GTPv1)
zeek_plugin_cc(GTPv1.cc Plugin.cc)
zeek_plugin_bif(events.bif)
zeek_plugin_pac(gtpv1.pac gtpv1-protocol.pac gtpv1-analyzer.pac)
zeek_plugin_end()

80
src/analyzer/protocol/gtpv1/GTPv1.cc
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@ -1,80 +0,0 @@
// See the file "COPYING" in the main distribution directory for copyright.
#include "zeek/analyzer/protocol/gtpv1/GTPv1.h"
#include "zeek/analyzer/protocol/gtpv1/events.bif.h"
#include "zeek/packet_analysis/protocol/ip/IP.h"
#include "zeek/packet_analysis/protocol/iptunnel/IPTunnel.h"
namespace zeek::analyzer::gtpv1
{
GTPv1_Analyzer::GTPv1_Analyzer(Connection* conn) : Analyzer("GTPV1", conn)
{
interp = new binpac::GTPv1::GTPv1_Conn(this);
}
GTPv1_Analyzer::~GTPv1_Analyzer()
{
delete interp;
}
void GTPv1_Analyzer::Done()
{
Analyzer::Done();
Event(udp_session_done);
}
void GTPv1_Analyzer::DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen)
{
Analyzer::DeliverPacket(len, data, orig, seq, ip, caplen);
try
{
interp->NewData(orig, data, data + len);
}
catch ( const binpac::Exception& e )
{
AnalyzerViolation(util::fmt("Binpac exception: %s", e.c_msg()));
}
if ( inner_packet_offset <= 0 )
return;
auto odata = data;
auto olen = len;
data += inner_packet_offset;
len -= inner_packet_offset;
caplen -= inner_packet_offset;
inner_packet_offset = -1;
std::shared_ptr<IP_Hdr> inner = nullptr;
int result = packet_analysis::IP::ParsePacket(len, data, next_header, inner);
if ( result == 0 )
{
interp->set_valid(orig, true);
if ( (! BifConst::Tunnel::delay_gtp_confirmation) ||
(interp->valid(true) && interp->valid(false)) )
AnalyzerConfirmation();
if ( gtp_hdr_val )
BifEvent::enqueue_gtpv1_g_pdu_packet(this, Conn(), std::move(gtp_hdr_val),
inner->ToPktHdrVal());
std::shared_ptr<zeek::EncapsulationStack> e = Conn()->GetEncapsulation();
EncapsulatingConn ec(Conn(), BifEnum::Tunnel::GTPv1);
zeek::packet_analysis::IPTunnel::ip_tunnel_analyzer->ProcessEncapsulatedPacket(
run_state::network_time, nullptr, inner, e, ec);
}
else if ( result == -2 )
AnalyzerViolation("Invalid IP version in wrapped packet",
reinterpret_cast<const char*>(odata), olen);
else if ( result < 0 )
AnalyzerViolation("Truncated GTPv1", reinterpret_cast<const char*>(odata), olen);
else
AnalyzerViolation("GTPv1 payload length", reinterpret_cast<const char*>(odata), olen);
}
} // namespace zeek::analyzer::gtpv1

39
src/analyzer/protocol/gtpv1/GTPv1.h
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@ -1,39 +0,0 @@
#pragma once
#include "analyzer/protocol/gtpv1/gtpv1_pac.h"
namespace binpac::GTPv1
{
class GTPv1_Conn;
}
namespace zeek::analyzer::gtpv1
{
class GTPv1_Analyzer final : public analyzer::Analyzer
{
public:
explicit GTPv1_Analyzer(Connection* conn);
virtual ~GTPv1_Analyzer();
virtual void Done();
virtual void DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen);
static analyzer::Analyzer* Instantiate(Connection* conn) { return new GTPv1_Analyzer(conn); }
void SetInnerInfo(int offset, uint8_t next, RecordValPtr val)
{
inner_packet_offset = offset;
next_header = next;
gtp_hdr_val = std::move(val);
}
protected:
binpac::GTPv1::GTPv1_Conn* interp;
int inner_packet_offset = -1;
uint8_t next_header = 0;
RecordValPtr gtp_hdr_val;
};
} // namespace zeek::analyzer::gtpv1

26
src/analyzer/protocol/gtpv1/Plugin.cc
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@ -1,26 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/plugin/Plugin.h"
#include "zeek/analyzer/Component.h"
#include "zeek/analyzer/protocol/gtpv1/GTPv1.h"
namespace zeek::plugin::detail::Zeek_GTPv1
{
class Plugin : public zeek::plugin::Plugin
{
public:
zeek::plugin::Configuration Configure() override
{
AddComponent(new zeek::analyzer::Component(
"GTPv1", zeek::analyzer::gtpv1::GTPv1_Analyzer::Instantiate));
zeek::plugin::Configuration config;
config.name = "Zeek::GTPv1";
config.description = "GTPv1 analyzer";
return config;
}
} plugin;
} // namespace zeek::plugin::detail::Zeek_GTPv1

74
src/analyzer/protocol/gtpv1/events.bif
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@ -1,74 +0,0 @@
## Generated for any GTP message with a GTPv1 header.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
event gtpv1_message%(c: connection, hdr: gtpv1_hdr%);
## Generated for GTPv1 G-PDU packets. That is, packets with a UDP payload
## that includes a GTP header followed by an IPv4 or IPv6 packet.
##
## outer: The GTP outer tunnel connection.
##
## inner_gtp: The GTP header.
##
## inner_ip: The inner IP and transport layer packet headers.
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event gtpv1_g_pdu_packet%(outer: connection, inner_gtp: gtpv1_hdr, inner_ip: pkt_hdr%);
## Generated for GTPv1-C Create PDP Context Request messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_create_pdp_ctx_request%(c: connection, hdr: gtpv1_hdr, elements: gtp_create_pdp_ctx_request_elements%);
## Generated for GTPv1-C Create PDP Context Response messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_create_pdp_ctx_response%(c: connection, hdr: gtpv1_hdr, elements: gtp_create_pdp_ctx_response_elements%);
## Generated for GTPv1-C Update PDP Context Request messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_update_pdp_ctx_request%(c: connection, hdr: gtpv1_hdr, elements: gtp_update_pdp_ctx_request_elements%);
## Generated for GTPv1-C Update PDP Context Response messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_update_pdp_ctx_response%(c: connection, hdr: gtpv1_hdr, elements: gtp_update_pdp_ctx_response_elements%);
## Generated for GTPv1-C Delete PDP Context Request messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_delete_pdp_ctx_request%(c: connection, hdr: gtpv1_hdr, elements: gtp_delete_pdp_ctx_request_elements%);
## Generated for GTPv1-C Delete PDP Context Response messages.
##
## c: The connection over which the message is sent.
##
## hdr: The GTPv1 header.
##
## elements: The set of Information Elements comprising the message.
event gtpv1_delete_pdp_ctx_response%(c: connection, hdr: gtpv1_hdr, elements: gtp_delete_pdp_ctx_response_elements%);

753
src/analyzer/protocol/gtpv1/gtpv1-analyzer.pac
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@ -1,753 +0,0 @@
%extern{
#include "zeek/ZeekString.h"
#include "zeek/analyzer/protocol/gtpv1/GTPv1.h"
%}
%code{
zeek::RecordValPtr BuildGTPv1Hdr(const GTPv1_Header* pdu)
{
auto rv = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtpv1_hdr);
rv->Assign(0, pdu->version());
rv->Assign(1, pdu->pt_flag());
rv->Assign(2, pdu->rsv());
rv->Assign(3, pdu->e_flag());
rv->Assign(4, pdu->s_flag());
rv->Assign(5, pdu->pn_flag());
rv->Assign(6, pdu->msg_type());
rv->Assign(7, pdu->length());
rv->Assign(8, pdu->teid());
if ( pdu->has_opt() )
{
rv->Assign(9, pdu->opt_hdr()->seq());
rv->Assign(10, pdu->opt_hdr()->n_pdu());
rv->Assign(11, pdu->opt_hdr()->next_type());
}
return rv;
}
static zeek::ValPtr BuildIMSI(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->imsi()->value());
}
static zeek::ValPtr BuildRAI(const InformationElement* ie)
{
auto ev = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtp_rai);
ev->Assign(0, ie->rai()->mcc());
ev->Assign(1, ie->rai()->mnc());
ev->Assign(2, ie->rai()->lac());
ev->Assign(3, ie->rai()->rac());
return ev;
}
static zeek::ValPtr BuildRecovery(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->recovery()->restart_counter());
}
static zeek::ValPtr BuildSelectionMode(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->selection_mode()->mode());
}
static zeek::ValPtr BuildTEID1(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->teid1()->value());
}
static zeek::ValPtr BuildTEID_ControlPlane(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->teidcp()->value());
}
static zeek::ValPtr BuildNSAPI(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->nsapi()->nsapi());
}
static zeek::ValPtr BuildChargingCharacteristics(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->charging_characteristics()->value());
}
static zeek::ValPtr BuildTraceReference(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->trace_reference()->value());
}
static zeek::ValPtr BuildTraceType(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->trace_type()->value());
}
zeek::ValPtr BuildEndUserAddr(const InformationElement* ie)
{
auto ev = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtp_end_user_addr);
ev->Assign(0, ie->end_user_addr()->pdp_type_org());
ev->Assign(1, ie->end_user_addr()->pdp_type_num());
int len = ie->end_user_addr()->pdp_addr().length();
if ( len > 0 )
{
const uint8* d = ie->end_user_addr()->pdp_addr().data();
switch ( ie->end_user_addr()->pdp_type_num() ) {
case 0x21:
ev->Assign(2, zeek::make_intrusive<zeek::AddrVal>(
zeek::IPAddr(IPv4, (const uint32*) d, zeek::IPAddr::Network)));
break;
case 0x57:
ev->Assign(2, zeek::make_intrusive<zeek::AddrVal>(
zeek::IPAddr(IPv6, (const uint32*) d, zeek::IPAddr::Network)));
break;
default:
ev->Assign(3, new zeek::String((const u_char*) d, len, false));
break;
}
}
return ev;
}
zeek::ValPtr BuildAccessPointName(const InformationElement* ie)
{
zeek::String* bs = new zeek::String((const u_char*) ie->ap_name()->value().data(),
ie->ap_name()->value().length(), false);
return zeek::make_intrusive<zeek::StringVal>(bs);
}
zeek::ValPtr BuildProtoConfigOptions(const InformationElement* ie)
{
const u_char* d = (const u_char*) ie->proto_config_opts()->value().data();
int len = ie->proto_config_opts()->value().length();
return zeek::make_intrusive<zeek::StringVal>(new zeek::String(d, len, false));
}
zeek::ValPtr BuildGSN_Addr(const InformationElement* ie)
{
auto ev = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtp_gsn_addr);
int len = ie->gsn_addr()->value().length();
const uint8* d = ie->gsn_addr()->value().data();
if ( len == 4 )
ev->Assign(0, zeek::make_intrusive<zeek::AddrVal>(
zeek::IPAddr(IPv4, (const uint32*) d, zeek::IPAddr::Network)));
else if ( len == 16 )
ev->Assign(0, zeek::make_intrusive<zeek::AddrVal>(
zeek::IPAddr(IPv6, (const uint32*) d, zeek::IPAddr::Network)));
else
ev->Assign(1, new zeek::String((const u_char*) d, len, false));
return ev;
}
zeek::ValPtr BuildMSISDN(const InformationElement* ie)
{
const u_char* d = (const u_char*) ie->msisdn()->value().data();
int len = ie->msisdn()->value().length();
return zeek::make_intrusive<zeek::StringVal>(new zeek::String(d, len, false));
}
zeek::ValPtr BuildQoS_Profile(const InformationElement* ie)
{
auto ev = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtp_qos_profile);
const u_char* d = (const u_char*) ie->qos_profile()->data().data();
int len = ie->qos_profile()->data().length();
ev->Assign(0, ie->qos_profile()->alloc_retention_priority());
ev->Assign(1, new zeek::String(d, len, false));
return ev;
}
zeek::ValPtr BuildTrafficFlowTemplate(const InformationElement* ie)
{
const uint8* d = ie->traffic_flow_template()->value().data();
int len = ie->traffic_flow_template()->value().length();
return zeek::make_intrusive<zeek::StringVal>(new zeek::String((const u_char*) d, len, false));
}
zeek::ValPtr BuildTriggerID(const InformationElement* ie)
{
const uint8* d = ie->trigger_id()->value().data();
int len = ie->trigger_id()->value().length();
return zeek::make_intrusive<zeek::StringVal>(new zeek::String((const u_char*) d, len, false));
}
zeek::ValPtr BuildOMC_ID(const InformationElement* ie)
{
const uint8* d = ie->omc_id()->value().data();
int len = ie->omc_id()->value().length();
return zeek::make_intrusive<zeek::StringVal>(new zeek::String((const u_char*) d, len, false));
}
zeek::ValPtr BuildPrivateExt(const InformationElement* ie)
{
auto ev = zeek::make_intrusive<zeek::RecordVal>(zeek::BifType::Record::gtp_private_extension);
const uint8* d = ie->private_ext()->value().data();
int len = ie->private_ext()->value().length();
ev->Assign(0, ie->private_ext()->id());
ev->Assign(1, new zeek::String((const u_char*) d, len, false));
return ev;
}
static zeek::ValPtr BuildCause(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->cause()->value());
}
static zeek::ValPtr BuildReorderReq(const InformationElement* ie)
{
return zeek::val_mgr->Bool(ie->reorder_req()->req());
}
static zeek::ValPtr BuildChargingID(const InformationElement* ie)
{
return zeek::val_mgr->Count(ie->charging_id()->value());;
}
zeek::ValPtr BuildChargingGatewayAddr(const InformationElement* ie)
{
const uint8* d = ie->charging_gateway_addr()->value().data();
int len = ie->charging_gateway_addr()->value().length();
if ( len == 4 )
return zeek::make_intrusive<zeek::AddrVal>(zeek::IPAddr(IPv4, (const uint32*) d, zeek::IPAddr::Network));
else if ( len == 16 )
return zeek::make_intrusive<zeek::AddrVal>(zeek::IPAddr(IPv6, (const uint32*) d, zeek::IPAddr::Network));
else
return nullptr;
}
static zeek::ValPtr BuildTeardownInd(const InformationElement* ie)
{
return zeek::val_mgr->Bool(ie->teardown_ind()->ind());
}
void CreatePDP_Request(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_create_pdp_ctx_request ) return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_create_pdp_ctx_request_elements);
const vector<InformationElement *> * v = pdu->create_pdp_ctx_request();
bool second_nsapi = false;
bool second_gsn_addr = false;
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_IMSI:
rv->Assign(0, BuildIMSI(ie));
break;
case GTPv1::TYPE_RAI:
rv->Assign(1, BuildRAI(ie));
break;
case GTPv1::TYPE_RECOVERY:
rv->Assign(2, BuildRecovery(ie));
break;
case GTPv1::TYPE_SELECTION_MODE:
rv->Assign(3, BuildSelectionMode(ie));
break;
case GTPv1::TYPE_TEID1:
rv->Assign(4, BuildTEID1(ie));
break;
case GTPv1::TYPE_TEID_CONTROL_PLANE:
rv->Assign(5, BuildTEID_ControlPlane(ie));
break;
case GTPv1::TYPE_NSAPI:
if ( second_nsapi )
rv->Assign(7, BuildNSAPI(ie));
else
{
second_nsapi = true;
rv->Assign(6, BuildNSAPI(ie));
}
break;
case GTPv1::TYPE_CHARGING_CHARACTERISTICS:
rv->Assign(8, BuildChargingCharacteristics(ie));
break;
case GTPv1::TYPE_TRACE_REFERENCE:
rv->Assign(9, BuildTraceReference(ie));
break;
case GTPv1::TYPE_TRACE_TYPE:
rv->Assign(10, BuildTraceType(ie));
break;
case GTPv1::TYPE_END_USER_ADDR:
rv->Assign(11, BuildEndUserAddr(ie));
break;
case GTPv1::TYPE_ACCESS_POINT_NAME:
rv->Assign(12, BuildAccessPointName(ie));
break;
case GTPv1::TYPE_PROTO_CONFIG_OPTIONS:
rv->Assign(13, BuildProtoConfigOptions(ie));
break;
case GTPv1::TYPE_GSN_ADDR:
if ( second_gsn_addr )
rv->Assign(15, BuildGSN_Addr(ie));
else
{
second_gsn_addr = true;
rv->Assign(14, BuildGSN_Addr(ie));
}
break;
case GTPv1::TYPE_MSISDN:
rv->Assign(16, BuildMSISDN(ie));
break;
case GTPv1::TYPE_QOS_PROFILE:
rv->Assign(17, BuildQoS_Profile(ie));
break;
case GTPv1::TYPE_TRAFFIC_FLOW_TEMPLATE:
rv->Assign(18, BuildTrafficFlowTemplate(ie));
break;
case GTPv1::TYPE_TRIGGER_ID:
rv->Assign(19, BuildTriggerID(ie));
break;
case GTPv1::TYPE_OMC_ID:
rv->Assign(20, BuildOMC_ID(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(21, BuildPrivateExt(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_create_pdp_ctx_request(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
void CreatePDP_Response(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_create_pdp_ctx_response )
return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_create_pdp_ctx_response_elements);
const vector<InformationElement *> * v = pdu->create_pdp_ctx_response();
bool second_gsn_addr = false;
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_CAUSE:
rv->Assign(0, BuildCause(ie));
break;
case GTPv1::TYPE_REORDER_REQ:
rv->Assign(1, BuildReorderReq(ie));
break;
case GTPv1::TYPE_RECOVERY:
rv->Assign(2, BuildRecovery(ie));
break;
case GTPv1::TYPE_TEID1:
rv->Assign(3, BuildTEID1(ie));
break;
case GTPv1::TYPE_TEID_CONTROL_PLANE:
rv->Assign(4, BuildTEID_ControlPlane(ie));
break;
case GTPv1::TYPE_CHARGING_ID:
rv->Assign(5, BuildChargingID(ie));
break;
case GTPv1::TYPE_END_USER_ADDR:
rv->Assign(6, BuildEndUserAddr(ie));
break;
case GTPv1::TYPE_PROTO_CONFIG_OPTIONS:
rv->Assign(7, BuildProtoConfigOptions(ie));
break;
case GTPv1::TYPE_GSN_ADDR:
if ( second_gsn_addr )
rv->Assign(9, BuildGSN_Addr(ie));
else
{
second_gsn_addr = true;
rv->Assign(8, BuildGSN_Addr(ie));
}
break;
case GTPv1::TYPE_QOS_PROFILE:
rv->Assign(10, BuildQoS_Profile(ie));
break;
case GTPv1::TYPE_CHARGING_GATEWAY_ADDR:
rv->Assign(11, BuildChargingGatewayAddr(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(12, BuildPrivateExt(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_create_pdp_ctx_response(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
void UpdatePDP_Request(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_update_pdp_ctx_request )
return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_update_pdp_ctx_request_elements);
const vector<InformationElement *> * v = pdu->update_pdp_ctx_request();
bool second_gsn_addr = false;
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_IMSI:
rv->Assign(0, BuildIMSI(ie));
break;
case GTPv1::TYPE_RAI:
rv->Assign(1, BuildRAI(ie));
break;
case GTPv1::TYPE_RECOVERY:
rv->Assign(2, BuildRecovery(ie));
break;
case GTPv1::TYPE_TEID1:
rv->Assign(3, BuildTEID1(ie));
break;
case GTPv1::TYPE_TEID_CONTROL_PLANE:
rv->Assign(4, BuildTEID_ControlPlane(ie));
break;
case GTPv1::TYPE_NSAPI:
rv->Assign(5, BuildNSAPI(ie));
break;
case GTPv1::TYPE_TRACE_REFERENCE:
rv->Assign(6, BuildTraceReference(ie));
break;
case GTPv1::TYPE_TRACE_TYPE:
rv->Assign(7, BuildTraceType(ie));
break;
case GTPv1::TYPE_GSN_ADDR:
if ( second_gsn_addr )
rv->Assign(9, BuildGSN_Addr(ie));
else
{
second_gsn_addr = true;
rv->Assign(8, BuildGSN_Addr(ie));
}
break;
case GTPv1::TYPE_QOS_PROFILE:
rv->Assign(10, BuildQoS_Profile(ie));
break;
case GTPv1::TYPE_TRAFFIC_FLOW_TEMPLATE:
rv->Assign(11, BuildTrafficFlowTemplate(ie));
break;
case GTPv1::TYPE_TRIGGER_ID:
rv->Assign(12, BuildTriggerID(ie));
break;
case GTPv1::TYPE_OMC_ID:
rv->Assign(13, BuildOMC_ID(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(14, BuildPrivateExt(ie));
break;
case GTPv1::TYPE_END_USER_ADDR:
rv->Assign(15, BuildEndUserAddr(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_update_pdp_ctx_request(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
void UpdatePDP_Response(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_update_pdp_ctx_response )
return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_update_pdp_ctx_response_elements);
const vector<InformationElement *> * v = pdu->update_pdp_ctx_response();
bool second_gsn_addr = false;
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_CAUSE:
rv->Assign(0, BuildCause(ie));
break;
case GTPv1::TYPE_RECOVERY:
rv->Assign(1, BuildRecovery(ie));
break;
case GTPv1::TYPE_TEID1:
rv->Assign(2, BuildTEID1(ie));
break;
case GTPv1::TYPE_TEID_CONTROL_PLANE:
rv->Assign(3, BuildTEID_ControlPlane(ie));
break;
case GTPv1::TYPE_CHARGING_ID:
rv->Assign(4, BuildChargingID(ie));
break;
case GTPv1::TYPE_GSN_ADDR:
if ( second_gsn_addr )
rv->Assign(6, BuildGSN_Addr(ie));
else
{
second_gsn_addr = true;
rv->Assign(5, BuildGSN_Addr(ie));
}
break;
case GTPv1::TYPE_QOS_PROFILE:
rv->Assign(7, BuildQoS_Profile(ie));
break;
case GTPv1::TYPE_CHARGING_GATEWAY_ADDR:
rv->Assign(8, BuildChargingGatewayAddr(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(9, BuildPrivateExt(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_update_pdp_ctx_response(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
void DeletePDP_Request(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_delete_pdp_ctx_request )
return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_delete_pdp_ctx_request_elements);
const vector<InformationElement *> * v = pdu->delete_pdp_ctx_request();
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_TEARDOWN_IND:
rv->Assign(0, BuildTeardownInd(ie));
break;
case GTPv1::TYPE_NSAPI:
rv->Assign(1, BuildNSAPI(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(2, BuildPrivateExt(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_delete_pdp_ctx_request(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
void DeletePDP_Response(const ZeekAnalyzer& a, const GTPv1_Header* pdu)
{
if ( ! ::gtpv1_delete_pdp_ctx_response )
return;
auto rv = zeek::make_intrusive<zeek::RecordVal>(
zeek::BifType::Record::gtp_delete_pdp_ctx_response_elements);
const vector<InformationElement *> * v = pdu->delete_pdp_ctx_response();
for ( size_t i = 0; i < v->size(); ++i )
{
const InformationElement* ie = (*v)[i];
switch ( ie->type() ) {
case GTPv1::TYPE_CAUSE:
rv->Assign(0, BuildCause(ie));
break;
case GTPv1::TYPE_PRIVATE_EXT:
rv->Assign(1, BuildPrivateExt(ie));
break;
default:
a->Weird("gtp_invalid_info_element", zeek::util::fmt("%d", (*v)[i]->type()));
break;
}
}
zeek::BifEvent::enqueue_gtpv1_delete_pdp_ctx_response(a, a->Conn(),
BuildGTPv1Hdr(pdu), std::move(rv));
}
%}
connection GTPv1_Conn(zeek_analyzer: ZeekAnalyzer)
{
upflow = GTPv1_Flow(true);
downflow = GTPv1_Flow(false);
%member{
bool valid_orig;
bool valid_resp;
%}
%init{
valid_orig = valid_resp = false;
%}
function valid(orig: bool): bool
%{
return orig ? valid_orig : valid_resp;
%}
function set_valid(orig: bool, val: bool): void
%{
if ( orig )
valid_orig = val;
else
valid_resp = val;
%}
}
flow GTPv1_Flow(is_orig: bool)
{
datagram = GTPv1_Header withcontext(connection, this);
function violate(r: string, pdu: GTPv1_Header): void
%{
ZeekAnalyzer a = connection()->zeek_analyzer();
const_bytestring b = ${pdu.sourcedata};
a->AnalyzerViolation(r.c_str(), (const char*) b.begin(), b.length());
%}
function process_gtpv1(pdu: GTPv1_Header): bool
%{
ZeekAnalyzer a = connection()->zeek_analyzer();
zeek::Connection* c = a->Conn();
const std::shared_ptr<zeek::EncapsulationStack> e = c->GetEncapsulation();
connection()->set_valid(is_orig(), false);
if ( e && e->Depth() >= zeek::BifConst::Tunnel::max_depth )
{
a->Weird("tunnel_depth");
return false;
}
if ( e && e->LastType() == BifEnum::Tunnel::GTPv1 )
{
// GTP is never tunneled in GTP so, this must be a regular packet
violate("GTP-in-GTP", pdu);
return false;
}
if ( ${pdu.version} != 1 )
{
// Only know of GTPv1 with Version == 1
violate("GTPv1 bad Version", pdu);
return false;
}
if ( ! ${pdu.pt_flag} )
{
// Not interested in GTP'
return false;
}
if ( ::gtpv1_message )
zeek::BifEvent::enqueue_gtpv1_message(a, c, BuildGTPv1Hdr(pdu));
switch ( ${pdu.msg_type} ) {
case 16:
CreatePDP_Request(a, pdu);
return true;
case 17:
CreatePDP_Response(a, pdu);
return true;
case 18:
UpdatePDP_Request(a, pdu);
return true;
case 19:
UpdatePDP_Response(a, pdu);
return true;
case 20:
DeletePDP_Request(a, pdu);
return true;
case 21:
DeletePDP_Response(a, pdu);
return true;
case 255:
return process_g_pdu(pdu);
default:
return false;
}
return false;
%}
function process_g_pdu(pdu: GTPv1_Header): bool
%{
ZeekAnalyzer a = connection()->zeek_analyzer();
zeek::Connection* c = a->Conn();
if ( ${pdu.packet}.length() < (int)sizeof(struct ip) )
{
violate("Truncated GTPv1", pdu);
return false;
}
const struct ip* ip = (const struct ip*) ${pdu.packet}.data();
if ( ip->ip_v != 4 && ip->ip_v != 6 )
{
violate("non-IP packet in GTPv1", pdu);
return false;
}
int hdr_len = 8;
if ( pdu->has_opt() )
hdr_len += 4;
if ( pdu->e_flag() && pdu->ext_hdrs() )
for ( const auto& eh : *pdu->ext_hdrs() )
hdr_len += 2 + eh->contents().length();
auto next_hdr = ip->ip_v == 6 ? IPPROTO_IPV6 : IPPROTO_IPV4;
zeek::RecordValPtr hdr_val;
if ( ::gtpv1_g_pdu_packet )
hdr_val = BuildGTPv1Hdr(pdu);
static_cast<zeek::analyzer::gtpv1::GTPv1_Analyzer*>(
connection()->zeek_analyzer())->SetInnerInfo(
hdr_len, next_hdr, std::move(hdr_val));
return true;
%}
};
refine typeattr GTPv1_Header += &let { proc_gtpv1 = $context.flow.process_gtpv1(this); };

496
src/analyzer/protocol/gtpv1/gtpv1-protocol.pac
View file

@ -1,496 +0,0 @@
type GTPv1_Header = record {
flags: uint8;
msg_type: uint8;
length: uint16;
teid: uint32;
opt: case has_opt of {
true -> opt_hdr: GTPv1_Opt_Header;
false -> no_opt: empty;
};
ext: case e_flag of {
true -> ext_hdrs: GTPv1_Ext_Header[] &until($element.next_type == 0);
false -> no_ext: empty;
};
msg: case msg_type of {
16 -> create_pdp_ctx_request: InformationElement[];
17 -> create_pdp_ctx_response: InformationElement[];
18 -> update_pdp_ctx_request: InformationElement[];
19 -> update_pdp_ctx_response: InformationElement[];
20 -> delete_pdp_ctx_request: InformationElement[];
21 -> delete_pdp_ctx_response: InformationElement[];
255 -> packet: bytestring &restofdata;
default -> unknown: bytestring &restofdata;
};
} &let {
version: uint8 = (flags & 0xE0) >> 5;
pt_flag: bool = flags & 0x10;
rsv: bool = flags & 0x08;
e_flag: bool = flags & 0x04;
s_flag: bool = flags & 0x02;
pn_flag: bool = flags & 0x01;
has_opt: bool = flags & 0x07;
} &byteorder = bigendian, &exportsourcedata;
type GTPv1_Opt_Header = record {
seq: uint16;
n_pdu: uint8;
next_type: uint8;
};
type GTPv1_Ext_Header = record {
length: uint8;
contents: bytestring &length=(length * 4 - 2);
next_type: uint8;
};
enum InfoElementType {
TYPE_CAUSE = 1,
TYPE_IMSI = 2,
TYPE_RAI = 3,
TYPE_TLLI = 4,
TYPE_P_TMSI = 5,
TYPE_REORDER_REQ = 8,
TYPE_AUTHN_TRIPLET = 9,
TYPE_MAP_CAUSE = 11,
TYPE_P_TMSI_SIG = 12,
TYPE_MS_VALID = 13,
TYPE_RECOVERY = 14,
TYPE_SELECTION_MODE = 15,
TYPE_TEID1 = 16,
TYPE_TEID_CONTROL_PLANE = 17,
TYPE_TEID2 = 18,
TYPE_TEARDOWN_IND = 19,
TYPE_NSAPI = 20,
TYPE_RANAP_CAUSE = 21,
TYPE_RAB_CTX = 22,
TYPE_RADIO_PRIORITY_SMS = 23,
TYPE_RADIO_PRIORITY = 24,
TYPE_PACKET_FLOW_ID = 25,
TYPE_CHARGING_CHARACTERISTICS = 26,
TYPE_TRACE_REFERENCE = 27,
TYPE_TRACE_TYPE = 28,
TYPE_MS_NOT_REACHABLE_REASON = 29,
TYPE_CHARGING_ID = 127,
TYPE_END_USER_ADDR = 128,
TYPE_MM_CTX = 129,
TYPE_PDP_CTX = 130,
TYPE_ACCESS_POINT_NAME = 131,
TYPE_PROTO_CONFIG_OPTIONS = 132,
TYPE_GSN_ADDR = 133,
TYPE_MSISDN = 134,
TYPE_QOS_PROFILE = 135,
TYPE_AUTHN_QUINTUPLET = 136,
TYPE_TRAFFIC_FLOW_TEMPLATE = 137,
TYPE_TARGET_ID = 138,
TYPE_UTRAN_TRANSPARENT_CONTAINER = 139,
TYPE_RAB_SETUP_INFO = 140,
TYPE_EXT_HEADER_TYPE_LIST = 141,
TYPE_TRIGGER_ID = 142,
TYPE_OMC_ID = 143,
TYPE_CHARGING_GATEWAY_ADDR = 251,
TYPE_PRIVATE_EXT = 255,
};
type InformationElement = record {
type: uint8;
len: case is_tlv of {
true -> tlv_len: uint16;
false -> no_len: empty;
};
value: case type of {
TYPE_CAUSE -> cause: Cause;
TYPE_IMSI -> imsi: IMSI;
TYPE_RAI -> rai: RAI;
TYPE_TLLI -> tlli: TLLI;
TYPE_P_TMSI -> p_tmsi: P_TMSI;
TYPE_REORDER_REQ -> reorder_req: ReorderReq;
TYPE_AUTHN_TRIPLET -> authn_triplet: AuthN_Triplet;
TYPE_MAP_CAUSE -> map_cause: MAP_Cause;
TYPE_P_TMSI_SIG -> p_tmsi_sig: P_TMSI_Sig;
TYPE_MS_VALID -> ms_valid: MS_Valid;
TYPE_RECOVERY -> recovery: Recovery;
TYPE_SELECTION_MODE -> selection_mode: SelectionMode;
TYPE_TEID1 -> teid1: TEID1;
TYPE_TEID_CONTROL_PLANE -> teidcp: TEID_ControlPlane;
TYPE_TEID2 -> teid2: TEID2;
TYPE_TEARDOWN_IND -> teardown_ind: TeardownInd;
TYPE_NSAPI -> nsapi: NSAPI;
TYPE_RANAP_CAUSE -> ranap_cause: RANAP_Cause;
TYPE_RAB_CTX -> rab_ctx: RAB_Ctx;
TYPE_RADIO_PRIORITY_SMS -> radio_priority_sms: RadioPrioritySMS;
TYPE_RADIO_PRIORITY -> radio_priority: RadioPriority;
TYPE_PACKET_FLOW_ID -> packet_flow_id: PacketFlowID;
TYPE_CHARGING_CHARACTERISTICS -> charging_characteristics: ChargingCharacteristics;
TYPE_TRACE_REFERENCE -> trace_reference: TraceReference;
TYPE_TRACE_TYPE -> trace_type: TraceType;
TYPE_MS_NOT_REACHABLE_REASON -> ms_not_reachable_reason: MS_Not_Reachable_Reason;
TYPE_CHARGING_ID -> charging_id: ChargingID;
TYPE_END_USER_ADDR -> end_user_addr: EndUserAddr(length);
TYPE_MM_CTX -> mm_ctx: MM_Ctx(length);
TYPE_PDP_CTX -> pdp_ctx: PDP_Ctx(length);
TYPE_ACCESS_POINT_NAME -> ap_name: AP_Name(length);
TYPE_PROTO_CONFIG_OPTIONS -> proto_config_opts: ProtoConfigOpts(length);
TYPE_GSN_ADDR -> gsn_addr: GSN_Addr(length);
TYPE_MSISDN -> msisdn: MSISDN(length);
TYPE_QOS_PROFILE -> qos_profile: QoS_Profile(length);
TYPE_AUTHN_QUINTUPLET -> authn_quintuplet: AuthN_Quintuplet(length);
TYPE_TRAFFIC_FLOW_TEMPLATE -> traffic_flow_template: TrafficFlowTemplate(length);
TYPE_TARGET_ID -> target_id: TargetID(length);
TYPE_UTRAN_TRANSPARENT_CONTAINER -> utran_transparent_container: UTRAN_TransparentContainer(length);
TYPE_RAB_SETUP_INFO -> rab_setup_info: RAB_SetupInfo(length);
TYPE_EXT_HEADER_TYPE_LIST -> ext_hdr_type_list: ExtHdrTypeList(length);
TYPE_TRIGGER_ID -> trigger_id: TriggerID(length);
TYPE_OMC_ID -> omc_id: OMC_ID(length);
TYPE_CHARGING_GATEWAY_ADDR -> charging_gateway_addr: ChargingGatewayAddr(length);
TYPE_PRIVATE_EXT -> private_ext: PrivateExt(length);
default -> unknown: bytestring &length=length;
} &requires(length);
} &let {
is_tlv: bool = (type & 0x80);
length: uint16 = is_tlv ? tlv_len : Get_IE_Len(type);
};
type Cause = record {
value: uint8;
};
function decode_imsi(v: uint8[8]): uint64
%{
uint64 rval = 0;
uint8 digits[16];
for ( size_t i = 0; i < v->size(); ++i )
{
digits[2 * i + 1] = ((*v)[i] & 0xf0) >> 4;
digits[2 * i] = (*v)[i] & 0x0f;
}
int power = 0;
for ( int i = 15; i >= 0; --i )
{
if ( digits[i] == 0x0f ) continue;
rval += digits[i] * pow(10, power);
++power;
}
return rval;
%}
type IMSI = record {
tbcd_encoded_value: uint8[8];
} &let {
value: uint64 = decode_imsi(tbcd_encoded_value);
};
type RAI = record {
mcc2_mcc1: uint8;
mnc3_mcc3: uint8;
mnc2_mnc1: uint8;
lac: uint16;
rac: uint8;
} &let {
mcc1: uint8 = (mcc2_mcc1 & 0x0f);
mcc2: uint8 = ((mcc2_mcc1 & 0xf0)>>4);
mcc3: uint8 = (mnc3_mcc3 & 0x0f);
mcc: uint16 = mcc1 * 100 + mcc2 * 10 + mcc3;
mnc1: uint8 = (mnc2_mnc1 & 0x0f);
mnc2: uint8 = ((mnc2_mnc1 & 0xf0)>>4);
mnc3: uint8 = (mnc3_mcc3 & 0xf0)>>4;
mnc: uint16 = (mnc3 & 0x0f) ? mnc1 * 10 + mnc2 : mnc1 * 100 + mnc2 * 10 + mnc3;
};
type TLLI = record {
value: uint32;
};
type P_TMSI = record {
value: uint32;
};
type ReorderReq = record {
value: uint8;
} &let {
req: bool = value & 0x01;
};
type AuthN_Triplet = record {
rand: bytestring &length=16;
sres: uint32;
kc: uint64;
};
type MAP_Cause = record {
value: uint8;
};
type P_TMSI_Sig = record {
value: bytestring &length=3;
};
type MS_Valid = record {
value: uint8;
};
type Recovery = record {
restart_counter: uint8;
};
type SelectionMode = record {
value: uint8;
} &let {
mode: uint8 = value & 0x01;
};
type TEID1 = record {
value: uint32;
};
type TEID_ControlPlane = record {
value: uint32;
};
type TEID2 = record {
spare_nsapi: uint8;
teid2: uint32;
};
type TeardownInd = record {
value: uint8;
} &let {
ind: bool = value & 0x01;
};
type NSAPI = record {
xxxx_nsapi: uint8;
} &let {
nsapi: uint8 = xxxx_nsapi & 0x0f;
};
type RANAP_Cause = record {
value: uint8;
};
type RAB_Ctx = record {
spare_nsapi: uint8;
dl_gtpu_seq_num: uint16;
ul_gtpu_seq_num: uint16;
dl_pdcp_seq_num: uint16;
ul_pdcp_seq_num: uint16;
};
type RadioPrioritySMS = record {
value: uint8;
};
type RadioPriority = record {
nsapi_radio_priority: uint8;
};
type PacketFlowID = record {
rsv_nsapi: uint8;
packet_flow_id: uint8;
};
type ChargingCharacteristics = record {
value: uint16;
};
type TraceReference = record {
value: uint16;
};
type TraceType = record {
value: uint16;
};
type MS_Not_Reachable_Reason = record {
value: uint8;
};
type ChargingID = record {
value: uint32;
};
type EndUserAddr(n: uint16) = record {
spare_pdp_type_org: uint8;
pdp_type_num: uint8;
pdp_addr: bytestring &length=(n-2);
} &let {
pdp_type_org: uint8 = spare_pdp_type_org & 0x0f;
};
type MM_Ctx(n: uint16) = record {
spare_cksn_ksi: uint8;
security_params: uint8;
keys: case gsm_keys of {
true -> kc: uint64;
false -> ck_ik: bytestring &length=32;
};
vector_len: case have_triplets of {
true -> no_quint_len: empty;
false -> quint_len: uint16;
};
vectors: case have_triplets of {
true -> triplets: AuthN_Triplet[num_vectors];
false -> quintuplets: AuthN_Quintuplet(quint_len)[num_vectors];
} &requires(num_vectors);
drx_param: uint16;
ms_net_capability_len: uint8;
ms_net_capability: bytestring &length=ms_net_capability_len;
container_len: uint16;
container: bytestring &length=container_len;
} &let {
security_mode: uint8 = security_params >> 6;
gsm_keys: bool = security_mode & 0x01;
have_triplets: bool = (security_mode == 1);
num_vectors: uint8 = (security_params & 0x38) >> 3;
};
type PDP_Ctx(n: uint16) = record {
rsv_nsapi: uint8;
xxxx_sapi: uint8;
qos_sub_len: uint8;
qos_sub: QoS_Profile(qos_sub_len);
qos_req_len: uint8;
qos_req: QoS_Profile(qos_req_len);
qos_neg_len: uint8;
qos_neg: QoS_Profile(qos_neg_len);
snd: uint16;
snu: uint16;
send_npdu_num: uint8;
recv_npdu_num: uint8;
ul_teid_cp: TEID_ControlPlane;
ul_teid_data1: TEID1;
pdp_ctx_id: uint8;
spare_pdp_type_org: uint8;
pdp_type_num: uint8;
pdp_addr_len: uint8;
pdp_addr: bytestring &length=pdp_addr_len;
ggsn_addr_control_plane_len: uint8;
ggsn_addr_control_plane: bytestring &length=ggsn_addr_control_plane_len;
ggsn_addr_user_traffic_len: uint8;
ggsn_addr_user_traffic: bytestring &length=ggsn_addr_user_traffic_len;
apn_len: uint8;
apn: AP_Name(apn_len);
spare_transaction_id: uint8;
transaction_id: uint8;
};
type AP_Name(n: uint16) = record {
value: bytestring &length=n;
};
type ProtoConfigOpts(n: uint16) = record {
value: bytestring &length=n;
};
type GSN_Addr(n: uint16) = record {
value: bytestring &length=n;
};
type MSISDN(n: uint16) = record {
value: bytestring &length=n;
};
type QoS_Profile(n: uint16) = record {
alloc_retention_priority: uint8;
data: bytestring &length=n-1;
};
type AuthN_Quintuplet(n: uint16) = record {
rand: bytestring &length=16;
xres_len: uint8;
xres: bytestring &length=xres_len;
ck: bytestring &length=16;
ik: bytestring &length=16;
autn_len: uint8;
autn: bytestring &length=autn_len;
};
type TrafficFlowTemplate(n: uint16) = record {
value: bytestring &length=n;
};
type TargetID(n: uint16) = record {
value: bytestring &length=n;
};
type UTRAN_TransparentContainer(n: uint16) = record {
value: bytestring &length=n;
};
type RAB_SetupInfo(n: uint16) = record {
xxxx_nsapi: uint8;
have_teid: case n of {
1 -> no_teid: empty;
default -> teid: TEID1;
};
have_addr: case n of {
1 -> no_addr: empty;
default -> rnc_addr: bytestring &length=n-5;
};
};
type ExtHdrTypeList(n: uint16) = record {
value: uint8[n];
};
type TriggerID(n: uint16) = record {
value: bytestring &length=n;
};
type OMC_ID(n: uint16) = record {
value: bytestring &length=n;
};
type ChargingGatewayAddr(n: uint16) = record {
value: bytestring &length=n;
};
type PrivateExt(n: uint16) = record {
id: uint16;
value: bytestring &length=n-2;
};
function Get_IE_Len(t: uint8): uint16 =
case t of {
TYPE_CAUSE -> 1;
TYPE_IMSI -> 8;
TYPE_RAI -> 6;
TYPE_TLLI -> 4;
TYPE_P_TMSI -> 4;
TYPE_REORDER_REQ -> 1;
TYPE_AUTHN_TRIPLET -> 28;
TYPE_MAP_CAUSE -> 1;
TYPE_P_TMSI_SIG -> 3;
TYPE_MS_VALID -> 1;
TYPE_RECOVERY -> 1;
TYPE_SELECTION_MODE -> 1;
TYPE_TEID1 -> 4;
TYPE_TEID_CONTROL_PLANE -> 4;
TYPE_TEID2 -> 5;
TYPE_TEARDOWN_IND -> 1;
TYPE_NSAPI -> 1;
TYPE_RANAP_CAUSE -> 1;
TYPE_RAB_CTX -> 9;
TYPE_RADIO_PRIORITY_SMS -> 1;
TYPE_RADIO_PRIORITY -> 1;
TYPE_PACKET_FLOW_ID -> 2;
TYPE_CHARGING_CHARACTERISTICS -> 2;
TYPE_TRACE_REFERENCE -> 2;
TYPE_TRACE_TYPE -> 2;
TYPE_MS_NOT_REACHABLE_REASON -> 1;
TYPE_CHARGING_ID -> 4;
};

18
src/analyzer/protocol/gtpv1/gtpv1.pac
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@ -1,18 +0,0 @@
%include binpac.pac
%include zeek.pac
%extern{
#include "zeek/IP.h"
#include "zeek/TunnelEncapsulation.h"
#include "zeek/Reporter.h"
#include "zeek/analyzer/protocol/gtpv1/events.bif.h"
%}
analyzer GTPv1 withcontext {
connection: GTPv1_Conn;
flow: GTPv1_Flow;
};
%include gtpv1-protocol.pac
%include gtpv1-analyzer.pac

9
src/analyzer/protocol/teredo/CMakeLists.txt
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@ -1,9 +0,0 @@
include(ZeekPlugin)
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
zeek_plugin_begin(Zeek Teredo)
zeek_plugin_cc(Teredo.cc Plugin.cc)
zeek_plugin_bif(events.bif)
zeek_plugin_end()

26
src/analyzer/protocol/teredo/Plugin.cc
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@ -1,26 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/plugin/Plugin.h"
#include "zeek/analyzer/Component.h"
#include "zeek/analyzer/protocol/teredo/Teredo.h"
namespace zeek::plugin::detail::Zeek_Teredo
{
class Plugin : public zeek::plugin::Plugin
{
public:
zeek::plugin::Configuration Configure() override
{
AddComponent(new zeek::analyzer::Component(
"Teredo", zeek::analyzer::teredo::Teredo_Analyzer::Instantiate));
zeek::plugin::Configuration config;
config.name = "Zeek::Teredo";
config.description = "Teredo analyzer";
return config;
}
} plugin;
} // namespace zeek::plugin::detail::Zeek_Teredo

237
src/analyzer/protocol/teredo/Teredo.cc
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@ -1,237 +0,0 @@
#include "zeek/analyzer/protocol/teredo/Teredo.h"
#include "zeek/Conn.h"
#include "zeek/IP.h"
#include "zeek/Reporter.h"
#include "zeek/RunState.h"
#include "zeek/TunnelEncapsulation.h"
#include "zeek/ZeekString.h"
#include "zeek/analyzer/protocol/teredo/events.bif.h"
#include "zeek/packet_analysis/protocol/ip/IP.h"
#include "zeek/packet_analysis/protocol/iptunnel/IPTunnel.h"
namespace zeek::analyzer::teredo
{
namespace detail
{
bool TeredoEncapsulation::DoParse(const u_char* data, int& len, bool found_origin, bool found_auth)
{
if ( len < 2 )
{
Weird("truncated_Teredo");
return false;
}
uint16_t tag = ntohs((*((const uint16_t*)data)));
if ( tag == 0 )
{
// Origin Indication
if ( found_origin )
// can't have multiple origin indications
return false;
if ( len < 8 )
{
Weird("truncated_Teredo_origin_indication");
return false;
}
origin_indication = data;
len -= 8;
data += 8;
return DoParse(data, len, true, found_auth);
}
else if ( tag == 1 )
{
// Authentication
if ( found_origin || found_auth )
// can't have multiple authentication headers and can't come after
// an origin indication
return false;
if ( len < 4 )
{
Weird("truncated_Teredo_authentication");
return false;
}
uint8_t id_len = data[2];
uint8_t au_len = data[3];
uint16_t tot_len = 4 + id_len + au_len + 8 + 1;
if ( len < tot_len )
{
Weird("truncated_Teredo_authentication");
return false;
}
auth = data;
len -= tot_len;
data += tot_len;
return DoParse(data, len, found_origin, true);
}
else if ( ((tag & 0xf000) >> 12) == 6 )
{
// IPv6
if ( len < 40 )
{
Weird("truncated_IPv6_in_Teredo");
return false;
}
// There's at least a possible IPv6 header, we'll decide what to do
// later if the payload length field doesn't match the actual length
// of the packet.
inner_ip = data;
return true;
}
return false;
}
RecordValPtr TeredoEncapsulation::BuildVal(const std::shared_ptr<IP_Hdr>& inner) const
{
static auto teredo_hdr_type = id::find_type<RecordType>("teredo_hdr");
static auto teredo_auth_type = id::find_type<RecordType>("teredo_auth");
static auto teredo_origin_type = id::find_type<RecordType>("teredo_origin");
auto teredo_hdr = make_intrusive<RecordVal>(teredo_hdr_type);
if ( auth )
{
auto teredo_auth = make_intrusive<RecordVal>(teredo_auth_type);
uint8_t id_len = *((uint8_t*)(auth + 2));
uint8_t au_len = *((uint8_t*)(auth + 3));
uint64_t nonce = ntohll(*((uint64_t*)(auth + 4 + id_len + au_len)));
uint8_t conf = *((uint8_t*)(auth + 4 + id_len + au_len + 8));
teredo_auth->Assign(0, new String(auth + 4, id_len, true));
teredo_auth->Assign(1, new String(auth + 4 + id_len, au_len, true));
teredo_auth->Assign(2, nonce);
teredo_auth->Assign(3, conf);
teredo_hdr->Assign(0, std::move(teredo_auth));
}
if ( origin_indication )
{
auto teredo_origin = make_intrusive<RecordVal>(teredo_origin_type);
uint16_t port = ntohs(*((uint16_t*)(origin_indication + 2))) ^ 0xFFFF;
uint32_t addr = ntohl(*((uint32_t*)(origin_indication + 4))) ^ 0xFFFFFFFF;
teredo_origin->Assign(0, val_mgr->Port(port, TRANSPORT_UDP));
teredo_origin->Assign(1, make_intrusive<AddrVal>(htonl(addr)));
teredo_hdr->Assign(1, std::move(teredo_origin));
}
teredo_hdr->Assign(2, inner->ToPktHdrVal());
return teredo_hdr;
}
} // namespace detail
void Teredo_Analyzer::Done()
{
Analyzer::Done();
Event(udp_session_done);
}
void Teredo_Analyzer::DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen)
{
Analyzer::DeliverPacket(len, data, orig, seq, ip, caplen);
if ( orig )
valid_orig = false;
else
valid_resp = false;
detail::TeredoEncapsulation te(this);
if ( ! te.Parse(data, len) )
{
AnalyzerViolation("Bad Teredo encapsulation", (const char*)data, len);
return;
}
std::shared_ptr<EncapsulationStack> e = Conn()->GetEncapsulation();
if ( e && e->Depth() >= BifConst::Tunnel::max_depth )
{
Weird("tunnel_depth", true);
return;
}
std::shared_ptr<IP_Hdr> inner = nullptr;
int rslt = packet_analysis::IP::ParsePacket(len, te.InnerIP(), IPPROTO_IPV6, inner);
if ( rslt > 0 )
{
if ( inner->NextProto() == IPPROTO_NONE && inner->PayloadLen() == 0 )
// Teredo bubbles having data after IPv6 header isn't strictly a
// violation, but a little weird.
Weird("Teredo_bubble_with_payload", true);
else
{
AnalyzerViolation("Teredo payload length", (const char*)data, len);
return;
}
}
if ( rslt == 0 || rslt > 0 )
{
if ( orig )
valid_orig = true;
else
valid_resp = true;
Confirm();
}
else
{
AnalyzerViolation("Truncated Teredo or invalid inner IP version", (const char*)data, len);
return;
}
ValPtr teredo_hdr;
if ( teredo_packet )
{
teredo_hdr = te.BuildVal(inner);
Conn()->EnqueueEvent(teredo_packet, nullptr, ConnVal(), teredo_hdr);
}
if ( te.Authentication() && teredo_authentication )
{
if ( ! teredo_hdr )
teredo_hdr = te.BuildVal(inner);
Conn()->EnqueueEvent(teredo_authentication, nullptr, ConnVal(), teredo_hdr);
}
if ( te.OriginIndication() && teredo_origin_indication )
{
if ( ! teredo_hdr )
teredo_hdr = te.BuildVal(inner);
Conn()->EnqueueEvent(teredo_origin_indication, nullptr, ConnVal(), teredo_hdr);
}
if ( inner->NextProto() == IPPROTO_NONE && teredo_bubble )
{
if ( ! teredo_hdr )
teredo_hdr = te.BuildVal(inner);
Conn()->EnqueueEvent(teredo_bubble, nullptr, ConnVal(), teredo_hdr);
}
EncapsulatingConn ec(Conn(), BifEnum::Tunnel::TEREDO);
packet_analysis::IPTunnel::ip_tunnel_analyzer->ProcessEncapsulatedPacket(
run_state::network_time, nullptr, inner, e, ec);
}
} // namespace zeek::analyzer::teredo

93
src/analyzer/protocol/teredo/Teredo.h
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@ -1,93 +0,0 @@
#pragma once
#include "zeek/NetVar.h"
#include "zeek/Reporter.h"
#include "zeek/analyzer/Analyzer.h"
namespace zeek::analyzer::teredo
{
class Teredo_Analyzer final : public analyzer::Analyzer
{
public:
explicit Teredo_Analyzer(Connection* conn)
: Analyzer("TEREDO", conn), valid_orig(false), valid_resp(false)
{
}
~Teredo_Analyzer() override = default;
void Done() override;
void DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq, const IP_Hdr* ip,
int caplen) override;
static analyzer::Analyzer* Instantiate(Connection* conn) { return new Teredo_Analyzer(conn); }
/**
* Emits a weird only if the analyzer has previously been able to
* decapsulate a Teredo packet in both directions or if *force* param is
* set, since otherwise the weirds could happen frequently enough to be less
* than helpful. The *force* param is meant for cases where just one side
* has a valid encapsulation and so the weird would be informative.
*/
void Weird(const char* name, bool force = false) const
{
if ( AnalyzerConfirmed() || force )
reporter->Weird(Conn(), name, "", GetAnalyzerName());
}
/**
* If the delayed confirmation option is set, then a valid encapsulation
* seen from both end points is required before confirming.
*/
void Confirm()
{
if ( ! BifConst::Tunnel::delay_teredo_confirmation || (valid_orig && valid_resp) )
AnalyzerConfirmation();
}
protected:
bool valid_orig;
bool valid_resp;
};
namespace detail
{
class TeredoEncapsulation
{
public:
explicit TeredoEncapsulation(const Teredo_Analyzer* ta)
: inner_ip(nullptr), origin_indication(nullptr), auth(nullptr), analyzer(ta)
{
}
/**
* Returns whether input data parsed as a valid Teredo encapsulation type.
* If it was valid, the len argument is decremented appropriately.
*/
bool Parse(const u_char* data, int& len) { return DoParse(data, len, false, false); }
const u_char* InnerIP() const { return inner_ip; }
const u_char* OriginIndication() const { return origin_indication; }
const u_char* Authentication() const { return auth; }
RecordValPtr BuildVal(const std::shared_ptr<IP_Hdr>& inner) const;
protected:
bool DoParse(const u_char* data, int& len, bool found_orig, bool found_au);
void Weird(const char* name) const { analyzer->Weird(name); }
const u_char* inner_ip;
const u_char* origin_indication;
const u_char* auth;
const Teredo_Analyzer* analyzer;
};
} // namespace detail
} // namespace zeek::analyzer::teredo

55
src/analyzer/protocol/teredo/events.bif
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@ -1,55 +0,0 @@
## Generated for any IPv6 packet encapsulated in a Teredo tunnel.
## See :rfc:`4380` for more information about the Teredo protocol.
##
## outer: The Teredo tunnel connection.
##
## inner: The Teredo-encapsulated IPv6 packet header and transport header.
##
## .. zeek:see:: teredo_authentication teredo_origin_indication teredo_bubble
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event teredo_packet%(outer: connection, inner: teredo_hdr%);
## Generated for IPv6 packets encapsulated in a Teredo tunnel that
## use the Teredo authentication encapsulation method.
## See :rfc:`4380` for more information about the Teredo protocol.
##
## outer: The Teredo tunnel connection.
##
## inner: The Teredo-encapsulated IPv6 packet header and transport header.
##
## .. zeek:see:: teredo_packet teredo_origin_indication teredo_bubble
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event teredo_authentication%(outer: connection, inner: teredo_hdr%);
## Generated for IPv6 packets encapsulated in a Teredo tunnel that
## use the Teredo origin indication encapsulation method.
## See :rfc:`4380` for more information about the Teredo protocol.
##
## outer: The Teredo tunnel connection.
##
## inner: The Teredo-encapsulated IPv6 packet header and transport header.
##
## .. zeek:see:: teredo_packet teredo_authentication teredo_bubble
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event teredo_origin_indication%(outer: connection, inner: teredo_hdr%);
## Generated for Teredo bubble packets. That is, IPv6 packets encapsulated
## in a Teredo tunnel that have a Next Header value of :zeek:id:`IPPROTO_NONE`.
## See :rfc:`4380` for more information about the Teredo protocol.
##
## outer: The Teredo tunnel connection.
##
## inner: The Teredo-encapsulated IPv6 packet header and transport header.
##
## .. zeek:see:: teredo_packet teredo_authentication teredo_origin_indication
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event teredo_bubble%(outer: connection, inner: teredo_hdr%);

9
src/analyzer/protocol/vxlan/CMakeLists.txt
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@ -1,9 +0,0 @@
include(ZeekPlugin)
include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
zeek_plugin_begin(Zeek VXLAN)
zeek_plugin_cc(VXLAN.cc Plugin.cc)
zeek_plugin_bif(events.bif)
zeek_plugin_end()

26
src/analyzer/protocol/vxlan/Plugin.cc
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@ -1,26 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/plugin/Plugin.h"
#include "zeek/analyzer/Component.h"
#include "zeek/analyzer/protocol/vxlan/VXLAN.h"
namespace zeek::plugin::detail::Zeek_VXLAN
{
class Plugin : public zeek::plugin::Plugin
{
public:
zeek::plugin::Configuration Configure() override
{
AddComponent(new zeek::analyzer::Component(
"VXLAN", zeek::analyzer::vxlan::VXLAN_Analyzer::Instantiate));
zeek::plugin::Configuration config;
config.name = "Zeek::VXLAN";
config.description = "VXLAN analyzer";
return config;
}
} plugin;
} // namespace zeek::plugin::detail::Zeek_VXLAN

102
src/analyzer/protocol/vxlan/VXLAN.cc
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@ -1,102 +0,0 @@
// See the file in the main distribution directory for copyright.
#include "zeek/analyzer/protocol/vxlan/VXLAN.h"
extern "C"
{
#include <pcap.h> // for the DLT_EN10MB constant definition
}
#include "zeek/Conn.h"
#include "zeek/IP.h"
#include "zeek/Reporter.h"
#include "zeek/RunState.h"
#include "zeek/TunnelEncapsulation.h"
#include "zeek/analyzer/protocol/vxlan/events.bif.h"
#include "zeek/packet_analysis/Manager.h"
#include "zeek/packet_analysis/protocol/iptunnel/IPTunnel.h"
namespace zeek::analyzer::vxlan
{
void VXLAN_Analyzer::Done()
{
Analyzer::Done();
Event(udp_session_done);
}
void VXLAN_Analyzer::DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq,
const IP_Hdr* ip, int caplen)
{
Analyzer::DeliverPacket(len, data, orig, seq, ip, caplen);
// Outer Ethernet, IP, and UDP layers already skipped.
// Also, generic UDP analyzer already checked/guarantees caplen >= len.
constexpr auto vxlan_len = 8;
if ( len < vxlan_len )
{
AnalyzerViolation("VXLAN header truncation", (const char*)data, len);
return;
}
if ( (data[0] & 0x08) == 0 )
{
AnalyzerViolation("VXLAN 'I' flag not set", (const char*)data, len);
return;
}
std::shared_ptr<EncapsulationStack> outer = Conn()->GetEncapsulation();
if ( outer && outer->Depth() >= BifConst::Tunnel::max_depth )
{
Weird("tunnel_depth");
return;
}
if ( ! outer )
outer = std::make_shared<EncapsulationStack>();
EncapsulatingConn inner(Conn(), BifEnum::Tunnel::VXLAN);
outer->Add(inner);
int encap_index = outer->Depth();
int vni = (data[4] << 16) + (data[5] << 8) + (data[6] << 0);
// Skip over the VXLAN header and create a new packet.
data += vxlan_len;
caplen -= vxlan_len;
len -= vxlan_len;
pkt_timeval ts;
ts.tv_sec = (time_t)run_state::current_timestamp;
ts.tv_usec = (suseconds_t)((run_state::current_timestamp - (double)ts.tv_sec) * 1000000);
Packet pkt(DLT_EN10MB, &ts, caplen, len, data);
pkt.encap = outer;
if ( ! packet_mgr->ProcessInnerPacket(&pkt) )
{
AnalyzerViolation("VXLAN invalid inner packet");
return;
}
// This isn't really an error. It's just that the inner packet wasn't an IP packet (like ARP).
// Just return without reporting a violation.
if ( ! pkt.ip_hdr )
return;
AnalyzerConfirmation();
if ( vxlan_packet )
{
EncapsulatingConn* ec = pkt.encap->At(encap_index);
if ( ec && ec->ip_hdr )
{
Conn()->EnqueueEvent(vxlan_packet, nullptr, ConnVal(), ec->ip_hdr->ToPktHdrVal(),
val_mgr->Count(vni));
}
}
}
} // namespace zeek::analyzer::vxlan

23
src/analyzer/protocol/vxlan/VXLAN.h
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@ -1,23 +0,0 @@
// See the file in the main distribution directory for copyright.
#pragma once
#include "zeek/analyzer/Analyzer.h"
namespace zeek::analyzer::vxlan
{
class VXLAN_Analyzer final : public analyzer::Analyzer
{
public:
explicit VXLAN_Analyzer(Connection* conn) : Analyzer("VXLAN", conn) { }
void Done() override;
void DeliverPacket(int len, const u_char* data, bool orig, uint64_t seq, const IP_Hdr* ip,
int caplen) override;
static analyzer::Analyzer* Instantiate(Connection* conn) { return new VXLAN_Analyzer(conn); }
};
} // namespace zeek::analyzer::vxlan

12
src/analyzer/protocol/vxlan/events.bif
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@ -1,12 +0,0 @@
## Generated for any packet encapsulated in a VXLAN tunnel.
## See :rfc:`7348` for more information about the VXLAN protocol.
##
## outer: The VXLAN tunnel connection.
##
## inner: The VXLAN-encapsulated Ethernet packet header and transport header.
##
## vni: VXLAN Network Identifier.
##
## .. note:: Since this event may be raised on a per-packet basis, handling
## it may become particularly expensive for real-time analysis.
event vxlan_packet%(outer: connection, inner: pkt_hdr, vni: count%);