From 9a9f85b180b87126e11ce8a937fce1a8ea818dc3 Mon Sep 17 00:00:00 2001
From: DcruBro <info@dcrubro.com>
Date: Tue, 20 Oct 2026 15:53:50 +0200
Subject: [PATCH] add endpoint type

---
 src/proto/conn.c     |  3 +++
 src/proto/conn.h     |  3 +++
 src/proto/endpoint.c | 10 ++++++++++
 src/proto/endpoint.h | 21 +++++++++++++++++++++
 4 files changed, 37 insertions(+)
 create mode 100644 src/proto/endpoint.c
 create mode 100644 src/proto/endpoint.h

diff --git a/src/proto/conn.c b/src/proto/conn.c
index b500127..1d6a8b0 100644
--- a/src/proto/conn.c
+++ b/src/proto/conn.c
@@ -41,6 +41,9 @@ bravais_result_t bravais_conn_create(const bravais_config_t* config, bravais_con
 
     newConn->config = *config;
     newConn->state = BRAVAIS_CONN_STATE_IDLE;
+    // calloc() already zeroes
+    //memset(&newConn->remoteEndpoint, 0, sizeof(newConn->remoteEndpoint));
+    //memset(&newConn->localEndpoint, 0, sizeof(newConn->localEndpoint));
 
     conn_log(newConn, BRAVAIS_LOG_LEVEL_DEBUG, "Connection created");
     *outConn = newConn;
diff --git a/src/proto/conn.h b/src/proto/conn.h
index 46d076f..8b1eda6 100644
--- a/src/proto/conn.h
+++ b/src/proto/conn.h
@@ -7,6 +7,7 @@
 #define BRAVAIS_CONN_H
 
 #include "bravais.h"
+#include "proto/endpoint.h"
 
 typedef enum {
     BRAVAIS_CONN_STATE_IDLE,
@@ -18,6 +19,8 @@ typedef enum {
 struct bravais_conn {
     bravais_config_t config;
     bravais_conn_state_t state;
+    bravais_endpoint_t remoteEndpoint;
+    bravais_endpoint_t localEndpoint; // This is here since the local endpoint, if we're initiating a connection, may not have a standard port number.
 };
 
 #endif // BRAVAIS_CONN_H
diff --git a/src/proto/endpoint.c b/src/proto/endpoint.c
new file mode 100644
index 0000000..66fe629
--- /dev/null
+++ b/src/proto/endpoint.c
@@ -0,0 +1,10 @@
+// endpoint.c
+// Endpoint internals for the lib
+
+#include "proto/endpoint.h"
+
+bool bravais_endpoint_is_ipv4(const bravais_endpoint_t* endpoint) {
+    if (!endpoint) { return false; }
+
+    return memcmp(endpoint->address, bravaisEndpointMappedIPv4Prefix, sizeof(bravaisEndpointMappedIPv4Prefix)) == 0;
+}
\ No newline at end of file
diff --git a/src/proto/endpoint.h b/src/proto/endpoint.h
new file mode 100644
index 0000000..267c609
--- /dev/null
+++ b/src/proto/endpoint.h
@@ -0,0 +1,21 @@
+// endpoint.h
+// Endpoint internals for the lib
+
+#ifndef BRAVAIS_ENDPOINT_H
+#define BRAVAIS_ENDPOINT_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+
+static const uint8_t bravaisEndpointMappedIPv4Prefix[12] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff };
+
+typedef struct bravais_endpoint {
+    uint8_t address[16]; // IPv6 address (or IPv4-mapped IPv6) - network byte order
+    uint16_t port;       // Port number - host byte order
+} bravais_endpoint_t;
+
+bool bravais_endpoint_is_ipv4(const bravais_endpoint_t* endpoint);
+
+#endif // BRAVAIS_ENDPOINT_H