diff --git a/apps/edge.c b/apps/edge.c
index 05af2919..9b38982a 100644
--- a/apps/edge.c
+++ b/apps/edge.c
@@ -1,6 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,6 +22,7 @@
 #include <ctype.h>                   // for isspace
 #include <errno.h>                   // for errno
 #include <getopt.h>                  // for required_argument, no_argument
+#include <n3n/logging.h>             // for traceEvent
 #include <signal.h>                  // for signal, SIG_IGN, SIGPIPE, SIGCHLD
 #include <stdbool.h>
 #include <stdint.h>                  // for uint8_t, uint16_t
diff --git a/apps/supernode.c b/apps/supernode.c
index d9ba353b..3788c042 100644
--- a/apps/supernode.c
+++ b/apps/supernode.c
@@ -1,6 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,6 +22,7 @@
 #include <ctype.h>             // for isspace
 #include <errno.h>             // for errno
 #include <getopt.h>            // for required_argument, getopt_long, no_arg...
+#include <n3n/logging.h>       // for traceEvent
 #include <signal.h>            // for signal, SIGHUP, SIGINT, SIGPIPE, SIGTERM
 #include <stdbool.h>
 #include <stdint.h>            // for uint8_t, uint32_t
@@ -30,7 +32,7 @@
 #include <sys/types.h>         // for time_t, u_char, u_int
 #include <time.h>              // for time
 #include <unistd.h>            // for _exit, daemon, getgid, getuid, setgid
-#include "n2n.h"               // for n2n_sn_t, sn_community, traceEvent
+#include "n2n.h"               // for n2n_sn_t, sn_community
 #include "pearson.h"           // for pearson_hash_64
 #include "uthash.h"            // for UT_hash_handle, HASH_ITER, HASH_ADD_STR
 
diff --git a/include/n2n.h b/include/n2n.h
index 36da4271..77c79e0a 100644
--- a/include/n2n.h
+++ b/include/n2n.h
@@ -94,16 +94,6 @@
 
 
 
-/* ************************************** */
-
-#ifndef TRACE_ERROR
-#define TRACE_ERROR       0
-#define TRACE_WARNING     1
-#define TRACE_NORMAL      2
-#define TRACE_INFO        3
-#define TRACE_DEBUG       4
-#endif
-
 /* ************************************** */
 
 /* Transop Init Functions */
@@ -117,15 +107,6 @@ int n2n_transop_lzo_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
 int n2n_transop_zstd_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
 #endif
 
-/* Log */
-void setTraceLevel (int level);
-void setUseSyslog (int use_syslog);
-void setTraceFile (FILE *f);
-int getTraceLevel ();
-void closeTraceFile ();
-void _traceEvent (int eventTraceLevel, char* file, int line, char * format, ...);
-#define traceEvent(level, format, ...) _traceEvent(level, __FILE__, __LINE__, format, ## __VA_ARGS__)
-
 /* Tuntap API */
 int tuntap_open (struct tuntap_dev *device, char *dev, const char *address_mode, char *device_ip,
                  char *device_mask, const char * device_mac, int mtu, int metric);
diff --git a/include/n3n/logging.h b/include/n3n/logging.h
new file mode 100644
index 00000000..518430e8
--- /dev/null
+++ b/include/n3n/logging.h
@@ -0,0 +1,28 @@
+/**
+ * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
+ *
+ * Public API for logging
+ */
+
+#ifndef _N2N_LOGGING_H_
+#define _N2N_LOGGING_H_
+
+#include <stdio.h>  // for FILE
+
+#define TRACE_ERROR       0
+#define TRACE_WARNING     1
+#define TRACE_NORMAL      2
+#define TRACE_INFO        3
+#define TRACE_DEBUG       4
+
+void setTraceLevel (int level);
+void setUseSyslog (int use_syslog);
+void setTraceFile (FILE *f);
+int getTraceLevel ();
+void closeTraceFile ();
+void _traceEvent (int eventTraceLevel, char* file, int line, char * format, ...);
+#define traceEvent(level, format, ...) _traceEvent(level, __FILE__, __LINE__, format, ## __VA_ARGS__)
+
+#endif
diff --git a/src/aes.c b/src/aes.c
index 6cc0c740..e1ab8363 100644
--- a/src/aes.c
+++ b/src/aes.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,11 +20,11 @@
 
 #include "config.h"
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>  // for uint32_t, uint8_t
 #include <stdlib.h>  // for calloc, free
 #include <string.h>  // for memcpy, size_t
 #include "aes.h"     // for AES_BLOCK_SIZE, aes_context_t, AES128_KEY_BYTES
-#include "n2n.h"     // for TRACE_ERROR, traceEvent
 #include "portable_endian.h"  // for be32toh, htobe32
 
 
diff --git a/src/auth.c b/src/auth.c
index 3efddf42..f005de05 100644
--- a/src/auth.c
+++ b/src/auth.c
@@ -1,5 +1,7 @@
 /*
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,6 +20,7 @@
 
 
 #include "auth.h"
+#include <n3n/logging.h> // for traceEvent
 #include <stdlib.h>      // for calloc, free
 #include <string.h>      // for strlen, size_t
 #include "curve25519.h"  // for curve25519
diff --git a/src/cc20.c b/src/cc20.c
index 739812c6..0bde7b76 100644
--- a/src/cc20.c
+++ b/src/cc20.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,11 +19,11 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdlib.h>     // for calloc, free, size_t
 #include <string.h>     // for memcpy
 #include "cc20.h"
 #include "config.h"  // HAVE_LIBCRYPTO
-#include "n2n.h"     // for TRACE_ERROR, traceEvent
 #include "portable_endian.h"  // for htole32
 
 
diff --git a/src/edge_management.c b/src/edge_management.c
index 341a71b7..c2012ba9 100644
--- a/src/edge_management.c
+++ b/src/edge_management.c
@@ -18,11 +18,12 @@
  *
  */
 
-#include "n2n.h"           // for n2n_edge_t, peer_info, getTraceLevel, N2N_...
+#include "n2n.h"           // for n2n_edge_t, N2N_...
 // FIXME: if this headers is sorted alphabetically, the test_integration_edge
 // fails with what looks like a struct rearrangement involving eee->stats
 
 #include <errno.h>         // for errno
+#include <n3n/logging.h>   // for traceEvent
 #include <stdbool.h>
 #include <stdint.h>        // for uint32_t
 #include <stdio.h>         // for snprintf, size_t, NULL
@@ -32,7 +33,7 @@
 #include "config.h"        // for PACKAGE_VERSION
 #include "management.h"    // for mgmt_req_t, send_reply, send_json_1str
 #include "n2n_define.h"    // for N2N_PKT_BUF_SIZE, N2N_EVENT_DEBUG, N2N_EVE...
-#include "n2n_typedefs.h"  // for n2n_edge_t, peer_info, n2n_edge_conf_t
+#include "n2n_typedefs.h"  // for n2n_edge_t, n2n_edge_conf_t
 #include "peer_info.h"     // for peer_info, peer_info_t
 #include "sn_selection.h"  // for sn_selection_criterion_str, selection_crit...
 #include "strbuf.h"        // for strbuf_t, STRBUF_INIT
diff --git a/src/edge_utils.c b/src/edge_utils.c
index 7a46e238..6fb86931 100644
--- a/src/edge_utils.c
+++ b/src/edge_utils.c
@@ -1,6 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,6 +21,7 @@
 
 #include <errno.h>                   // for errno, EAFNOSUPPORT, EINPROGRESS
 #include <fcntl.h>                   // for fcntl, F_SETFL, O_NONBLOCK
+#include <n3n/logging.h>             // for traceEvent
 #include <stdbool.h>
 #include <stdint.h>                  // for uint8_t, uint16_t, uint32_t, uin...
 #include <stdio.h>                   // for snprintf, sprintf
@@ -32,7 +34,7 @@
 #include "auth.h"                    // for generate_private_key
 #include "portable_endian.h"         // for be16toh, htobe16
 #include "header_encryption.h"       // for packet_header_encrypt, packet_he...
-#include "n2n.h"                     // for n2n_edge_t, peer_info, n2n_edge_...
+#include "n2n.h"                     // for n2n_edge_t, n2n_edge_...
 #include "n2n_wire.h"                // for encode_mac, fill_sockaddr, decod...
 #include "network_traffic_filter.h"  // for create_network_traffic_filter
 #include "pearson.h"                 // for pearson_hash_128, pearson_hash_64
diff --git a/src/header_encryption.c b/src/header_encryption.c
index 0cf2e020..52219f0c 100644
--- a/src/header_encryption.c
+++ b/src/header_encryption.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,11 +19,12 @@
  */
 
 
+#include <n3n/logging.h>        // for traceEvent
 #include <stdint.h>             // for uint32_t, uint8_t, uint64_t, uint16_t
 #include <stdlib.h>             // for calloc
 #include <string.h>             // for memcpy
 #include "header_encryption.h"  // for packet_header_change_dynamic_key, pac...
-#include "n2n.h"                // for he_context_t, N2N_COMMUNITY_SIZE, TRA...
+#include "n2n.h"                // for he_context_t, N2N_COMMUNITY_SIZE...
 #include "n2n_define.h"         // for N2N_COMMUNITY_SIZE
 #include "n2n_typedefs.h"       // for he_context_t, N2N_AUTH_CHALLENGE_SIZE
 #include "pearson.h"            // for pearson_hash_128, pearson_hash_64
diff --git a/src/management.c b/src/management.c
index 725c5beb..269fccc9 100644
--- a/src/management.c
+++ b/src/management.c
@@ -7,13 +7,13 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <pearson.h>     // for pearson_hash_64
 #include <stdbool.h>
 #include <stdio.h>       // for snprintf, NULL, size_t
 #include <stdlib.h>      // for strtoul
 #include <string.h>      // for strtok, strlen, strncpy
 #include "management.h"
-#include "n2n.h"         // for TRACE_DEBUG, traceEvent
 
 #ifdef _WIN32
 #include "win32/defs.h"
diff --git a/src/n2n.c b/src/n2n.c
index 57e89d87..911a10f4 100644
--- a/src/n2n.c
+++ b/src/n2n.c
@@ -1,6 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +20,7 @@
 
 
 #include <errno.h>           // for errno
+#include <n3n/logging.h>     // for traceEvent
 #include <stdarg.h>          // for va_end, va_list, va_start
 #include <stdbool.h>
 #include <stdlib.h>          // for free, atoi, calloc, strtol
@@ -615,8 +617,8 @@ void print_n2n_version () {
 
     printf("Welcome to n3n v.%s\n"
            "Built on %s\n"
-           "Copyright (C) 2023 Hamish Coleman\n",
-           "Copyright 2007-2022 - ntop.org and contributors\n\n",
+           "Copyright 2007-2022 - ntop.org and contributors\n"
+           "Copyright (C) 2023 Hamish Coleman\n\n",
            PACKAGE_VERSION, PACKAGE_BUILDDATE);
 }
 
diff --git a/src/network_traffic_filter.c b/src/network_traffic_filter.c
index 736f236a..d16bbeb2 100644
--- a/src/network_traffic_filter.c
+++ b/src/network_traffic_filter.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,6 +19,7 @@
  */
 
 
+#include <n3n/logging.h>             // for traceEvent
 #include <stdint.h>                  // for uint8_t, uint16_t, uint32_t
 #include <stdio.h>                   // for sprintf
 #include <stdlib.h>                  // for free, malloc, atoi
diff --git a/src/peer_info.c b/src/peer_info.c
index a60e69a1..fa2c1e89 100644
--- a/src/peer_info.c
+++ b/src/peer_info.c
@@ -1,11 +1,13 @@
 /**
  * (C) 2007-23 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  */
 
 #include <n2n.h>        // for time_stamp
 #include <n2n_define.h> // for TIME_STAMP_FRAME
+#include <n3n/logging.h> // for traceEvent
 #include <stdbool.h>
 #include "peer_info.h"
 
diff --git a/src/random_numbers.c b/src/random_numbers.c
index 5e17be90..ea947e60 100644
--- a/src/random_numbers.c
+++ b/src/random_numbers.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,11 +19,11 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <errno.h>   // for errno, EAGAIN
 #include <stddef.h>  // for NULL, size_t
 #include <time.h>    // for clock, time
 #include <unistd.h>  // for syscall
-#include "n2n.h"     // for TRACE_ERROR, traceEvent
 #include "random_numbers.h"
 
 
diff --git a/src/sn_management.c b/src/sn_management.c
index 26d73b7c..0fac1203 100644
--- a/src/sn_management.c
+++ b/src/sn_management.c
@@ -25,13 +25,14 @@
 
 
 #include <errno.h>       // for errno
+#include <n3n/logging.h> // for traceEvent
 #include <stdbool.h>
 #include <stdint.h>      // for uint8_t, uint32_t
 #include <stdio.h>       // for snprintf, size_t, sprintf, NULL
 #include <string.h>      // for memcmp, memcpy, strerror, strncpy
 #include <sys/types.h>   // for ssize_t, time_t
 #include "management.h"  // for mgmt_req_t, send_reply, mgmt_handler_t, mgmt...
-#include "n2n.h"         // for n2n_sn_t, sn_community, peer_info, N2N_SN_PK...
+#include "n2n.h"         // for n2n_sn_t, sn_community, N2N_SN_PK...
 #include "n2n_define.h"    // for N2N_SN_PKTBUF_SIZE, UNPURGEABLE
 #include "n2n_typedefs.h"  // for n2n_sn_t, sn_community, peer_info, sn_stats_t
 #include "peer_info.h"   // for peer_info, peer_info_t
diff --git a/src/sn_selection.c b/src/sn_selection.c
index c780f4e9..13b6a36a 100644
--- a/src/sn_selection.c
+++ b/src/sn_selection.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,6 +19,7 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>           // for UINT64_MAX, uint32_t, int64_t, uint64_t
 #include <stdio.h>            // for snprintf, NULL
 #include <string.h>           // for memcpy, memset
diff --git a/src/sn_utils.c b/src/sn_utils.c
index c1bfd704..8f3c9f0b 100644
--- a/src/sn_utils.c
+++ b/src/sn_utils.c
@@ -1,6 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
  * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +20,7 @@
 
 
 #include <errno.h>              // for errno, EAFNOSUPPORT
+#include <n3n/logging.h>        // for traceEvent
 #include <stdbool.h>
 #include <stdint.h>             // for uint8_t, uint32_t, uint16_t, uint64_t
 #include <stdio.h>              // for sscanf, snprintf, fclose, fgets, fopen
@@ -31,7 +33,7 @@
 #include "auth.h"               // for ascii_to_bin, calculate_dynamic_key
 #include "config.h"             // for PACKAGE_VERSION
 #include "header_encryption.h"  // for packet_header_encrypt, packet_header_...
-#include "n2n.h"                // for sn_community, n2n_sn_t, peer_info
+#include "n2n.h"                // for sn_community, n2n_sn_t
 #include "n2n_regex.h"          // for re_matchp, re_compile
 #include "n2n_wire.h"           // for encode_buf, encode_PEER_INFO, encode_...
 #include "pearson.h"            // for pearson_hash_128, pearson_hash_32
diff --git a/src/transform_aes.c b/src/transform_aes.c
index 9ba49eaf..ff3274b2 100644
--- a/src/transform_aes.c
+++ b/src/transform_aes.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,12 +19,13 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>          // for uint8_t
 #include <stdlib.h>          // for calloc, free
 #include <string.h>          // for memcpy, size_t, memset, memcmp, strlen
 #include <sys/types.h>       // for u_char, ssize_t, time_t
 #include "aes.h"             // for AES_BLOCK_SIZE, aes_cbc_decrypt, aes_cbc...
-#include "n2n.h"             // for n2n_trans_op_t, traceEvent, TRACE_ERROR
+#include "n2n.h"             // for n2n_trans_op_t
 #include "n2n_wire.h"        // for encode_uint64, encode_buf
 #include "pearson.h"         // for pearson_hash_256
 #include "random_numbers.h"  // for n2n_rand
diff --git a/src/transform_cc20.c b/src/transform_cc20.c
index 6cc8c8ec..588c0479 100644
--- a/src/transform_cc20.c
+++ b/src/transform_cc20.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,12 +19,13 @@
  */
 
 
+#include <n3n/logging.h>     // for traceEvent
 #include <stdint.h>          // for uint8_t
 #include <stdlib.h>          // for size_t, calloc, free
 #include <string.h>          // for memset, strlen
 #include <sys/types.h>       // for u_char, ssize_t, time_t
 #include "cc20.h"            // for CC20_IV_SIZE, cc20_crypt, cc20_deinit
-#include "n2n.h"             // for n2n_trans_op_t, traceEvent, TRACE_ERROR
+#include "n2n.h"             // for n2n_trans_op_t
 #include "n2n_wire.h"        // for encode_uint64
 #include "pearson.h"         // for pearson_hash_256
 #include "random_numbers.h"  // for n2n_rand
diff --git a/src/transform_lzo.c b/src/transform_lzo.c
index f588174c..a51cc361 100644
--- a/src/transform_lzo.c
+++ b/src/transform_lzo.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,12 +19,13 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>     // for uint8_t
 #include <stdlib.h>     // for size_t, calloc, free, NULL
 #include <string.h>     // for memset
 #include <sys/types.h>  // for time_t
 #include "minilzo.h"    // for lzo1x_1_compress, lzo1x_decompress, LZO1X_1_M...
-#include "n2n.h"        // for n2n_trans_op_t, TRACE_ERROR, traceEvent, N2N_...
+#include "n2n.h"        // for n2n_trans_op_t, N2N_...
 
 
 /* heap allocation for compression as per lzo example doc  */
diff --git a/src/transform_null.c b/src/transform_null.c
index 50e06a8d..4e422838 100644
--- a/src/transform_null.c
+++ b/src/transform_null.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,10 +19,11 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>     // for uint8_t
 #include <string.h>     // for memcpy, size_t, memset
 #include <sys/types.h>  // for time_t
-#include "n2n.h"        // for n2n_trans_op_t, TRACE_DEBUG, traceEvent, N2N_...
+#include "n2n.h"        // for n2n_trans_op_t, N2N_...
 
 
 static int transop_deinit_null (n2n_trans_op_t *arg ) {
diff --git a/src/transform_speck.c b/src/transform_speck.c
index 2270958c..5ca082a7 100644
--- a/src/transform_speck.c
+++ b/src/transform_speck.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,11 +19,12 @@
  */
 
 
+#include <n3n/logging.h>     // for traceEvent
 #include <stdint.h>          // for uint8_t
 #include <stdlib.h>          // for size_t, calloc, free
 #include <string.h>          // for memset, strlen
 #include <sys/types.h>       // for u_char, ssize_t, time_t
-#include "n2n.h"             // for n2n_trans_op_t, traceEvent, TRACE_DEBUG
+#include "n2n.h"             // for n2n_trans_op_t
 #include "n2n_wire.h"        // for encode_uint64
 #include "pearson.h"         // for pearson_hash_256
 #include "random_numbers.h"  // for n2n_rand
diff --git a/src/transform_tf.c b/src/transform_tf.c
index bae9d4e1..a99d2b70 100644
--- a/src/transform_tf.c
+++ b/src/transform_tf.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,11 +19,12 @@
  */
 
 
+#include <n3n/logging.h>     // for traceEvent
 #include <stdint.h>          // for uint8_t
 #include <stdlib.h>          // for calloc, free
 #include <string.h>          // for memcpy, size_t, memset, memcmp, strlen
 #include <sys/types.h>       // for u_char, ssize_t, time_t
-#include "n2n.h"             // for n2n_trans_op_t, traceEvent, TRACE_ERROR
+#include "n2n.h"             // for n2n_trans_op_t
 #include "n2n_wire.h"        // for encode_uint64, encode_buf
 #include "pearson.h"         // for pearson_hash_256
 #include "random_numbers.h"  // for n2n_rand
diff --git a/src/tuntap_linux.c b/src/tuntap_linux.c
index 9b6d1db3..434166a9 100644
--- a/src/tuntap_linux.c
+++ b/src/tuntap_linux.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,6 +29,7 @@
 #include <linux/if_tun.h>             // for IFF_NO_PI, IFF_TAP, TUNSETIFF
 #include <linux/netlink.h>            // for sockaddr_nl, nlmsghdr, NETLINK_...
 #include <linux/rtnetlink.h>          // for ifinfomsg, RTMGRP_LINK
+#include <n3n/logging.h>              // for traceEvent
 #include <net/if.h>                   // for ifreq, IFNAMSIZ, ifr_name, ifr_...
 #include <net/if_arp.h>               // for ARPHRD_ETHER
 #include <netinet/in.h>               // for sockaddr_in, IPPROTO_IP, in_addr
@@ -36,7 +39,7 @@
 #include <sys/param.h>                // for MIN
 #include <sys/socket.h>               // for socket, msghdr, AF_INET, sockaddr
 #include <unistd.h>                   // for close, getpid, read, write, ssi...
-#include "n2n.h"                      // for tuntap_dev, traceEvent, TRACE_E...
+#include "n2n.h"                      // for tuntap_dev, ...
 
 
 static int setup_ifname (int fd, const char *ifname, const char *ipaddr,
diff --git a/tools/n3n-benchmark.c b/tools/n3n-benchmark.c
index 8546b562..f1cb231e 100644
--- a/tools/n3n-benchmark.c
+++ b/tools/n3n-benchmark.c
@@ -1,5 +1,7 @@
 /*
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,6 +19,7 @@
  */
 
 
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>      // for uint8_t, uint64_t
 #include <stdio.h>       // for printf, fflush, size_t, NULL, stdout
 #include <string.h>      // for memset, memcpy, memcmp, strncpy
diff --git a/tools/n3n-decode.c b/tools/n3n-decode.c
index 1eaad8e9..71ebe987 100644
--- a/tools/n3n-decode.c
+++ b/tools/n3n-decode.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2019-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,6 +23,7 @@
 #ifdef HAVE_LIBPCAP
 
 #include <errno.h>             // for errno
+#include <n3n/logging.h>       // for traceEvent
 #include <pcap.h>
 #include <signal.h>            // for signal, SIGINT, SIGTERM
 #include "n2n.h"
diff --git a/tools/n3n-portfwd.c b/tools/n3n-portfwd.c
index a5d51dab..234e50ef 100644
--- a/tools/n3n-portfwd.c
+++ b/tools/n3n-portfwd.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,7 +20,7 @@
 
 
 #include <getopt.h>            // for getopt_long
-#include <unistd.h>            // for optarg
+#include <n3n/logging.h> // for traceEvent
 #include <signal.h>            // for signal, SIGINT, SIGPIPE, SIGTERM, SIG_IGN
 #include <stdbool.h>
 #include <stdint.h>            // for uint16_t, uint32_t, uint8_t
@@ -27,9 +29,9 @@
 #include <string.h>            // for strchr, strcmp
 #include <sys/time.h>          // for timeval
 #include <time.h>              // for time, time_t
-#include <unistd.h>            // for STDIN_FILENO, _exit
+#include <unistd.h>            // for STDIN_FILENO, _exit, optarg
 #include "json.h"              // for _jsonpair, json_object_t, json_free
-#include "n2n.h"               // for traceEvent, setTraceLevel, getTraceLevel
+#include "n2n.h"               // for SOCKET, N2N_EDGE_MGMT_PORT, closesocke...
 #include "n2n_port_mapping.h"  // for n2n_del_port_mapping, n2n_set_port_map...
 #include "random_numbers.h"    // for n2n_rand, n2n_seed, n2n_srand
 
diff --git a/tools/n3n-route.c b/tools/n3n-route.c
index 7c916de3..344ca650 100644
--- a/tools/n3n-route.c
+++ b/tools/n3n-route.c
@@ -1,5 +1,7 @@
 /**
  * (C) 2007-22 - ntop.org and contributors
+ * Copyright (C) 2023 Hamish Coleman
+ * SPDX-License-Identifier: GPL-3.0-only
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +21,7 @@
 
 #include <errno.h>             // for errno
 #include <getopt.h>            // for getopt_long, optind, optarg
+#include <n3n/logging.h>       // for traceEvent
 #include <signal.h>            // for signal, SIGINT, SIGPIPE, SIGTERM, SIG_IGN
 #include <stdbool.h>
 #include <stdint.h>            // for uint8_t, uint16_t, uint32_t
diff --git a/tools/tests-compress.c b/tools/tests-compress.c
index 2c73691a..854013c2 100644
--- a/tools/tests-compress.c
+++ b/tools/tests-compress.c
@@ -20,13 +20,14 @@
 
 #include <assert.h>    // for assert
 #include <inttypes.h>  // for PRIx64
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>    // for uint8_t
 #include <stdio.h>     // for printf, fprintf, stderr, stdout, NULL
 #include <stdlib.h>    // for exit
 #include <string.h>    // for memcmp
 #include "hexdump.h"   // for fhexdump
 #include "minilzo.h"   // for lzo1x_1_compress, lzo1x_decompress, LZO1X_1_ME...
-#include "n2n.h"       // for N2N_PKT_BUF_SIZE, TRACE_ERROR, traceEvent
+#include "n2n.h"       // for N2N_PKT_BUF_SIZE
 
 
 /* heap allocation for compression as per lzo example doc */
diff --git a/tools/tests-transform.c b/tools/tests-transform.c
index 3f8e2da2..5f32c106 100644
--- a/tools/tests-transform.c
+++ b/tools/tests-transform.c
@@ -20,6 +20,7 @@
 
 
 #include <inttypes.h>   // for PRIx64
+#include <n3n/logging.h> // for traceEvent
 #include <stdint.h>     // for uint8_t
 #include <stdio.h>      // for printf, fprintf, size_t, stderr, stdout
 #include <stdlib.h>     // for exit