🔍 debug: hex dump request_meta on both agent and server sides

Print first 16 bytes of dtp_meta_req_t on send (agent) and receive
(APM server) to find where payload_id gets corrupted from 1 to 4.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Mahmood Mohammed Seoud

satdeploy-agent/src/dtp_client.c

@@ -150,6 +150,22 @@ int dtp_download_file(uint32_t server_node, uint8_t payload_id,
         return -1;
     }
 
+    /* Debug: dump request_meta before sending */
+    {
+        uint8_t *raw = (uint8_t *)&session->request_meta;
+        printf("[dtp-debug] request_meta (first 16 bytes):");
+        for (int i = 0; i < 16 && i < (int)sizeof(session->request_meta); i++)
+            printf(" %02x", raw[i]);
+        printf("\n");
+        printf("[dtp-debug] throughput=%u nof_intervals=%u payload_id=%u mtu=%u session_id=%u\n",
+               session->request_meta.throughput,
+               session->request_meta.nof_intervals,
+               session->request_meta.payload_id,
+               session->request_meta.mtu,
+               session->request_meta.session_id);
+        fflush(stdout);
+    }
+
     /* Set user context and hooks BEFORE starting the transfer */
     dtp_session_set_user_ctx(session, &ctx);
 

satdeploy-apm/src/satdeploy_apm.c

@@ -332,7 +332,12 @@ static void *dtp_server_thread(void *arg) {
             continue;
         }
 
-        printf("[dtp-server] Got metadata request from node %d\n", csp_conn_src(conn));
+        printf("[dtp-server] Got metadata request from node %d, len=%u\n",
+               csp_conn_src(conn), packet->length);
+        printf("[dtp-server] raw packet data (first 16 bytes):");
+        for (int i = 0; i < 16 && i < packet->length; i++)
+            printf(" %02x", packet->data[i]);
+        printf("\n");
         fflush(stdout);
 
         packet = setup_server_transfer(&server_transfer_ctx, csp_conn_src(conn), packet);