fuzz: add network address tests

contrib/fuzz_testing/fuzz.sh

@@ -10,12 +10,12 @@ fi
 type="$1"
 if test -z "$type"
 then
-  echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"
+  echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs|network-address"
   exit 1
 fi
 case "$type" in
-  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs) ;;
-  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"; exit 1 ;;
+  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs|network-address) ;;
+  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs|network-address"; exit 1 ;;
 esac
 
 if test -d "fuzz-out/$type"

tests/data/fuzz/network-address/CIDRADDR1

@@ -0,0 +1 @@
+192.168.1.0/24

tests/data/fuzz/network-address/CIDRADDR2

@@ -0,0 +1 @@
+2001:db8:1234::/48

tests/data/fuzz/network-address/I2PADDR1

@@ -0,0 +1 @@
+reg.i2p

tests/data/fuzz/network-address/I2PADDR2

@@ -0,0 +1 @@
+xmgzqfidm3zn4y3vfljqiuyfxorifntjca3rfnwv3dbbfcrx4uca.b32.i2p

tests/data/fuzz/network-address/IPV4ADDR1

@@ -0,0 +1 @@
+192.168.1.1

tests/data/fuzz/network-address/IPV4ADDR2

@@ -0,0 +1 @@
+192.168.1.1:8080

tests/data/fuzz/network-address/IPV6ADDR1

@@ -0,0 +1 @@
+::1

tests/data/fuzz/network-address/IPV6ADDR2

@@ -0,0 +1 @@
+fe80::1ff:fe23:4567

tests/data/fuzz/network-address/ONIONADDR1

@@ -0,0 +1 @@
+nytimesn7cgmftshazwhfgzm37qxb44r64ytbb2dj3x62d2lljsciiyd.onion

tests/data/fuzz/network-address/ONIONADDR2

@@ -0,0 +1 @@
+protonirockerxow.onion

tests/data/fuzz/network-address/SOCKSADDR1

@@ -0,0 +1 @@
+socks5://127.0.0.1:1080

tests/data/fuzz/network-address/SOCKSADDR2

@@ -0,0 +1 @@
+socks5://username:password@[2001:db8::10]:1080

tests/fuzz/CMakeLists.txt

@@ -223,6 +223,19 @@ set_property(TARGET parse-url_fuzz_tests
   PROPERTY
     FOLDER "tests")
 
+monero_add_minimal_executable(network-address_fuzz_tests network_address.cpp fuzzer.cpp)
+target_link_libraries(network-address_fuzz_tests
+  PRIVATE
+    net
+    epee
+    ${Boost_PROGRAM_OPTIONS_LIBRARY}
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES}
+    $ENV{LIB_FUZZING_ENGINE})
+set_property(TARGET network-address_fuzz_tests
+  PROPERTY
+    FOLDER "tests")
+
 monero_add_minimal_executable(http-client_fuzz_tests http-client.cpp fuzzer.cpp)
 target_link_libraries(http-client_fuzz_tests
   PRIVATE

tests/fuzz/network_address.cpp

@@ -0,0 +1,82 @@
+// Copyright (c) 2026, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <string_view>
+
+#include "include_base_utils.h"
+#include "net/tor_address.h"
+#include "net/i2p_address.h"
+#include "net/parse.h"
+#include "fuzzer.h"
+
+BEGIN_INIT_SIMPLE_FUZZER()
+END_INIT_SIMPLE_FUZZER()
+
+BEGIN_SIMPLE_FUZZER()
+  const std::string input((const char*)buf, len);
+
+  // Onion addresses (Tor)
+  const auto tor = net::tor_address::make(input);
+  if (tor)
+  {
+    const std::string rendered = tor->str();
+    net::tor_address::make(rendered);
+  }
+
+  const auto onion_decoded = net::from_onion_v3(std::string_view{input});
+  net::validate_v3_onion_checksum(onion_decoded);
+
+  // I2P addresses
+  const auto i2p = net::i2p_address::make(input);
+  if (i2p)
+  {
+    const std::string rendered = i2p->str();
+    net::i2p_address::make(rendered);
+  }
+
+  // Generic host/port splitting, used for IPv4, IPv6, Tor, I2P, and hostnames
+  std::string host;
+  std::string port;
+  net::get_network_address_host_and_port(input, host, port);
+
+  // Generic address parsing (IPv4, IPv6, Tor, I2P)
+  net::get_network_address(input, 18080);
+
+  // IPv4 CIDR subnet parsing
+  net::get_ipv4_subnet_address(input, true);
+  net::get_ipv4_subnet_address(input, false);
+
+  // TODO add IPv6 CIDR subnet parsing
+
+  // TCP endpoint resolution (IPv4/IPv6 host/port)
+  net::get_tcp_endpoint(input);
+
+  // URI parsing (scheme, userinfo, host/port) and SOCKS endpoint parsing
+  net::uri_components::get(input);
+  net::socks::endpoint::get(input);
+END_SIMPLE_FUZZER()