Send server SSH version immediately after accepting connection to prevent client timeout

wssshtools/wsssh.c

@@ -477,17 +477,32 @@ int main(int argc, char *argv[]) {
     pthread_mutex_lock(&tunnel_mutex);
     active_tunnel->local_sock = accepted_sock;
 
+    // Send server version immediately to prevent SSH client timeout
+    const char *server_version = "SSH-2.0-OpenSSH_10.0p2 Debian-8\r\n";
+    size_t version_len = strlen(server_version);
+    if (config.debug) {
+        printf("[DEBUG - Tunnel] Sending server version immediately to SSH client\n");
+        fflush(stdout);
+    }
+    ssize_t sent = send(accepted_sock, server_version, version_len, 0);
+    if (sent > 0) {
+        if (config.debug) {
+            printf("[DEBUG] Sent %zd bytes of server version to SSH client\n", sent);
+            fflush(stdout);
+        }
+    }
+
     // Send any buffered data to the SSH client immediately
     if (active_tunnel->incoming_buffer && active_tunnel->incoming_buffer->used > 0) {
         if (config.debug) {
             printf("[DEBUG - Tunnel] Sending %zu bytes of buffered server response to SSH client\n", active_tunnel->incoming_buffer->used);
             fflush(stdout);
         }
-        ssize_t sent = send(accepted_sock, active_tunnel->incoming_buffer->buffer, active_tunnel->incoming_buffer->used, 0);
-        if (sent > 0) {
-            frame_buffer_consume(active_tunnel->incoming_buffer, sent);
+        ssize_t sent2 = send(accepted_sock, active_tunnel->incoming_buffer->buffer, active_tunnel->incoming_buffer->used, 0);
+        if (sent2 > 0) {
+            frame_buffer_consume(active_tunnel->incoming_buffer, sent2);
             if (config.debug) {
-                printf("[DEBUG] Sent %zd bytes of buffered server response to SSH client\n", sent);
+                printf("[DEBUG] Sent %zd bytes of buffered server response to SSH client\n", sent2);
                 fflush(stdout);
             }
         }