diff --git a/src/append_to_packet.c b/src/append_to_packet.c
index 42826e4..4946983 100644
--- a/src/append_to_packet.c
+++ b/src/append_to_packet.c
@@ -2,12 +2,13 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#include "internal/internal.h"
 
 // These functions append data to a packet buffer and advance the current pointer by the data size.
 
-static inline void validate_args(const void* const data, const uint32_t data_size, const char* const restrict caller) {
+static inline void validate_args(const void* const data, const uint32_t data_size) {
     if(unlikely(data == NULL || data_size == 0)) {
-        fprintf(stderr, "Error: Invalid arguments given to: %s.\n", caller);
+        PRINT_ERROR("Error: Invalid arguments given");
         exit(EXIT_FAILURE);
     }
 }
@@ -20,7 +21,7 @@ static inline void append_data(uint8_t** const append_pointer, const void* const
 
 void swiftnet_client_append_to_packet(const void* const data, const uint32_t data_size, struct SwiftNetPacketBuffer* const packet) {
     #ifdef SWIFT_NET_ERROR
-        validate_args(data, data_size, __func__);
+        validate_args(data, data_size);
     #endif
 
     append_data(&packet->packet_append_pointer, data, data_size);
@@ -28,7 +29,7 @@ void swiftnet_client_append_to_packet(const void* const data, const uint32_t dat
 
 void swiftnet_server_append_to_packet(const void* const data, const uint32_t data_size, struct SwiftNetPacketBuffer* const packet) {
     #ifdef SWIFT_NET_ERROR
-        validate_args(data, data_size, __func__);
+        validate_args(data, data_size);
     #endif
 
     append_data(&packet->packet_append_pointer, data, data_size);
diff --git a/src/generic_functions.c b/src/generic_functions.c
index 0940204..23bdef1 100644
--- a/src/generic_functions.c
+++ b/src/generic_functions.c
@@ -7,24 +7,24 @@
 
 // Set the handler for incoming packets/messages on the server or client
 
-static inline void swiftnet_validate_new_handler(const void* const new_handler, const char* const restrict caller) {
+static inline void swiftnet_validate_new_handler(const void* const new_handler) {
     #ifdef SWIFT_NET_ERROR
         if(unlikely(new_handler == NULL)) {
-            fprintf(stderr, "Error: Invalid arguments given to function: %s\n", caller);
+            PRINT_ERROR("Error: Invalid arguments given");
             exit(EXIT_FAILURE);
         }
     #endif
 }
 
 void swiftnet_client_set_message_handler(struct SwiftNetClientConnection* const client, void (* const new_handler)(struct SwiftNetClientPacketData* const, void* const), void* const user_arg) {
-    swiftnet_validate_new_handler(new_handler, __func__);
+    swiftnet_validate_new_handler(new_handler);
 
     atomic_store_explicit(&client->packet_handler, new_handler, memory_order_release);
     atomic_store_explicit(&client->packet_handler_user_arg, user_arg, memory_order_release);
 }
 
 void swiftnet_server_set_message_handler(struct SwiftNetServer* const server, void (* const new_handler)(struct SwiftNetServerPacketData* const, void* const), void* const user_arg) {
-    swiftnet_validate_new_handler(new_handler, __func__);
+    swiftnet_validate_new_handler(new_handler);
 
     atomic_store_explicit(&server->packet_handler, new_handler, memory_order_release);
     atomic_store_explicit(&server->packet_handler_user_arg, user_arg, memory_order_release);
@@ -35,7 +35,7 @@ void swiftnet_server_set_message_handler(struct SwiftNetServer* const server, vo
 void* swiftnet_client_read_packet(struct SwiftNetClientPacketData* const packet_data, const uint32_t data_size) {
     const uint32_t data_already_read = (packet_data->current_pointer - packet_data->data) + data_size;
     if (data_already_read > packet_data->metadata.data_length) {
-        fprintf(stderr, "Error: Tried to read more data than there actually is\n");
+        PRINT_ERROR("Error: Tried to read more data than there actually is");
         return NULL;
     }
 
@@ -49,7 +49,7 @@ void* swiftnet_client_read_packet(struct SwiftNetClientPacketData* const packet_
 void* swiftnet_server_read_packet(struct SwiftNetServerPacketData* const packet_data, const uint32_t data_size) {
     const uint32_t data_already_read = (packet_data->current_pointer - packet_data->data) + data_size;
     if (data_already_read > packet_data->metadata.data_length) {
-        fprintf(stderr, "Error: Tried to read more data than there actually is\n");
+        PRINT_ERROR("Error: Tried to read more data than there actually is");
         return NULL;
     }
 
diff --git a/src/initialize_client_socket.c b/src/initialize_client_socket.c
index 6422f37..99bf673 100644
--- a/src/initialize_client_socket.c
+++ b/src/initialize_client_socket.c
@@ -78,7 +78,7 @@ struct SwiftNetClientConnection* swiftnet_create_client(const char* const ip_add
 
     new_connection->pcap = swiftnet_pcap_open(loopback ? LOOPBACK_INTERFACE_NAME : default_network_interface);
     if (new_connection->pcap == NULL) {
-        fprintf(stderr, "Failed to open bpf\n");
+        PRINT_ERROR("Failed to open bpf");
         exit(EXIT_FAILURE);
     }
 
diff --git a/src/initialize_server_socket.c b/src/initialize_server_socket.c
index 52e8847..ff943e0 100644
--- a/src/initialize_server_socket.c
+++ b/src/initialize_server_socket.c
@@ -18,7 +18,7 @@ struct SwiftNetServer* swiftnet_create_server(const uint16_t port, const bool lo
 
     #ifdef SWIFT_NET_ERROR
         if(unlikely(new_server == NULL)) {
-            fprintf(stderr, "Failed to get an empty server\n");
+            PRINT_ERROR("Failed to get an empty server");
             exit(EXIT_FAILURE);
         }
     #endif
@@ -29,7 +29,7 @@ struct SwiftNetServer* swiftnet_create_server(const uint16_t port, const bool lo
     // Init pcap device
     new_server->pcap = swiftnet_pcap_open(loopback ? LOOPBACK_INTERFACE_NAME : default_network_interface);
     if (new_server->pcap == NULL) {
-        fprintf(stderr, "Failed to open bpf\n");
+        PRINT_ERROR("Failed to open bpf");
         exit(EXIT_FAILURE);
     }
 
diff --git a/src/initialize_swift_net.c b/src/initialize_swift_net.c
index 8788b86..5c320b2 100644
--- a/src/initialize_swift_net.c
+++ b/src/initialize_swift_net.c
@@ -36,7 +36,7 @@ struct SwiftNetVector listeners;
 void swiftnet_initialize() {
     const int temp_socket = socket(AF_INET, SOCK_DGRAM, 0);
     if (temp_socket < 0) {
-        perror("socket");
+        PRINT_ERROR("Failed to create temp socket");
         exit(EXIT_FAILURE);
     }
 
@@ -46,7 +46,7 @@ void swiftnet_initialize() {
     inet_pton(AF_INET, "8.8.8.8", &remote.sin_addr);
 
     if (connect(temp_socket, (struct sockaddr *)&remote, sizeof(remote)) < 0) {
-        fprintf(stderr, "Failed to connect temp socket\n");
+        PRINT_ERROR("Failed to connect temp socket");
         close(temp_socket);
         exit(EXIT_FAILURE);
     }
@@ -55,7 +55,7 @@ void swiftnet_initialize() {
     socklen_t private_sockaddr_len = sizeof(private_sockaddr);
 
     if(getsockname(temp_socket, &private_sockaddr, &private_sockaddr_len) == -1) {
-        fprintf(stderr, "Failed to get private ip address\n");
+        PRINT_ERROR("Failed to get private ip address");
         close(temp_socket);
         exit(EXIT_FAILURE);
     }
@@ -64,15 +64,15 @@ void swiftnet_initialize() {
 
     const int got_default_interface = get_default_interface_and_mac(default_network_interface, sizeof(default_network_interface), mac_address, temp_socket);
     if(unlikely(got_default_interface != 0)) {
+        PRINT_ERROR("Failed to get the default interface");
         close(temp_socket);
-        fprintf(stderr, "Failed to get the default interface\n");
         exit(EXIT_FAILURE);
     }
 
     maximum_transmission_unit = get_mtu(default_network_interface, temp_socket);
     if(unlikely(maximum_transmission_unit == 0)) {
+        PRINT_ERROR("Failed to get the maximum transmission unit");
         close(temp_socket);
-        fprintf(stderr, "Failed to get the maximum transmission unit\n");
         exit(EXIT_FAILURE);
     }
 
diff --git a/src/internal/internal.h b/src/internal/internal.h
index 638e9c4..581f696 100644
--- a/src/internal/internal.h
+++ b/src/internal/internal.h
@@ -53,6 +53,9 @@
 
 #define SIZEOF_FIELD(type, field) sizeof(((type *)0)->field)
 
+#define PRINT_ERROR(fmt, ...) \
+    do { fprintf(stderr, fmt " | function: %s | line: %d\n", ##__VA_ARGS__, __FUNCTION__, __LINE__); } while (0)
+
 #define MIN(one, two) (one > two ? two : one)
 
 static const uint16_t crc16_table[256] = {
diff --git a/src/process_packets.c b/src/process_packets.c
index ed8648b..3e59f3b 100644
--- a/src/process_packets.c
+++ b/src/process_packets.c
@@ -644,7 +644,7 @@ static inline void swiftnet_process_packets(
                     const uint32_t lost_chunks_num = return_lost_chunk_indexes(pending_message->chunks_received, packet_info.chunk_amount, chunk_data_size, (uint32_t*)lost_chunks_buffer);
 
                     if (lost_chunks_num != 0) {
-                        fprintf(stderr, "Packet marked as completed, but %d chunks are missing\n", lost_chunks_num);
+                        PRINT_ERROR("Packet marked as completed, but %d chunks are missing", lost_chunks_num);
 
                         for (uint32_t i = 0; i < lost_chunks_num; i++) {
                             printf("chunk index missing: %d\n", *(lost_chunks_buffer + i));  
diff --git a/src/send_packet.c b/src/send_packet.c
index 460ecbd..ae099d2 100644
--- a/src/send_packet.c
+++ b/src/send_packet.c
@@ -250,7 +250,7 @@ inline void swiftnet_send_packet(
 
         struct SwiftNetPacketSending* const new_packet_sending = allocator_allocate(packets_sending_memory_allocator);
         if(unlikely(new_packet_sending == NULL)) {
-            fprintf(stderr, "Failed to send a packet: exceeded maximum amount of sending packets at the same time\n");
+            PRINT_ERROR("Failed to send a packet: exceeded maximum amount of sending packets at the same time");
             return;
         }