0097-Fix-recv-implementation.patch

From 59b5f95c142ade4bcf24f8336ccddea3faeb1811 Mon Sep 17 00:00:00 2001
From: giulcioffi <g.cioffi@arduino.cc>
Date: Tue, 20 Jul 2021 10:40:12 +0200
Subject: [PATCH 097/157] Fix recv implementation

---
 .../CINTERION/GEMALTO_CINTERION_CellularStack.cpp | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/connectivity/drivers/cellular/GEMALTO/CINTERION/GEMALTO_CINTERION_CellularStack.cpp b/connectivity/drivers/cellular/GEMALTO/CINTERION/GEMALTO_CINTERION_CellularStack.cpp
index 9eb3e27b39..034011d2d2 100644
--- a/connectivity/drivers/cellular/GEMALTO/CINTERION/GEMALTO_CINTERION_CellularStack.cpp
+++ b/connectivity/drivers/cellular/GEMALTO/CINTERION/GEMALTO_CINTERION_CellularStack.cpp
@@ -105,9 +105,9 @@ void GEMALTO_CINTERION_CellularStack::sisr_urc_handler(int sock_id, int urc_code
 {
     CellularSocket *sock = find_socket(sock_id);
     if (sock) {
-        if (urc_code == 1) { // data available
+        if (urc_code > 0) { // data available
             if (sock->_cb) {
-                sock->pending_bytes = 1;
+                sock->pending_bytes = urc_code;
                 sock->_cb(sock->_data);
             }
         }
@@ -442,7 +442,6 @@ nsapi_size_or_error_t GEMALTO_CINTERION_CellularStack::socket_recvfrom_impl(Cell
     _at.cmd_start_stop("^SISR", "=", "%d%d", socket->id, size);
 
 sisr_retry:
-    socket->pending_bytes = 1;
     _at.resp_start("^SISR:");
     if (!_at.info_resp()) {
         tr_error("Socket %d not responding", socket->id);
@@ -476,13 +475,9 @@ sisr_retry:
         tr_error("Socket %d recvfrom failed!", socket->id);
         return NSAPI_ERROR_DEVICE_ERROR;
     }
-    socket->pending_bytes = 0;
+    socket->pending_bytes = 1;
     if (len >= (nsapi_size_or_error_t)size) {
         len = (nsapi_size_or_error_t)size;
-        int remain_len = _at.read_int();
-        if (remain_len > 0) {
-            socket->pending_bytes = 1;
-        }
     }
 
     // UDP Udp_RemClient
@@ -525,6 +520,10 @@ sisr_retry:
 
     nsapi_size_or_error_t recv_len = _at.read_bytes((uint8_t *)buffer, len);
 
+    if (recv_len < len) {
+        goto sisr_retry;
+    }
+
     _at.resp_stop();
 
     return (_at.get_last_error() == NSAPI_ERROR_OK) ? (recv_len ? recv_len : NSAPI_ERROR_WOULD_BLOCK) : NSAPI_ERROR_DEVICE_ERROR;
-- 
2.36.0