Updated non-blocking PDCP socket

More accurately, we changed the do/while infinite
loop to be an infinite for loop for the read command of
the socket. The socket file descriptor choice is more clear now.

openair2/PHY_INTERFACE/phy_stub_UE.c

@@ -1273,7 +1273,7 @@ void *ue_standalone_pnf_task(void *context)
 {
   struct sockaddr_in server_address;
   socklen_t addr_len = sizeof(server_address);
-  char buffer[1024];
+  char buffer[NFAPI_MAX_PACKED_MESSAGE_SIZE];
   int sd = ue_rx_sock_descriptor;
   assert(sd > 0);
 
@@ -1283,12 +1283,17 @@ void *ue_standalone_pnf_task(void *context)
   bool dl_config_req_valid = false;
   while (true)
   {
-    ssize_t len = recvfrom(sd, buffer, sizeof(buffer), 0, (struct sockaddr *)&server_address, &addr_len);
+    ssize_t len = recvfrom(sd, buffer, sizeof(buffer), MSG_TRUNC, (struct sockaddr *)&server_address, &addr_len);
     if (len == -1)
     {
       LOG_E(MAC, "reading from standalone pnf sctp socket failed \n");
       continue;
     }
+    if (len > sizeof(buffer))
+    {
+      LOG_E(MAC, "%s(%d). Message truncated. %zd\n", __FUNCTION__, __LINE__, len);
+      continue;
+    }
 
     if (len == sizeof(uint16_t))
     {
@@ -1660,7 +1665,7 @@ static void print_rx_ind(nfapi_rx_indication_t *p)
   void send_standalone_msg(UL_IND_t *UL, nfapi_message_id_e msg_type)
   {
     int encoded_size = -1;
-    char buffer[1024];
+    char buffer[NFAPI_MAX_PACKED_MESSAGE_SIZE];
 
     switch (msg_type)
     {

openair2/PHY_INTERFACE/phy_stub_UE.h

@@ -19,6 +19,7 @@
 //#include "openair1/PHY/LTE_TRANSPORT/defs.h"
 //#include "openair1/PHY/defs.h"
 //#include "openair1/PHY/LTE_TRANSPORT/defs.h"
+#include "nfapi/open-nFAPI/pnf/inc/pnf_p7.h"
 #include "queue.h"
 
 #define NUM_MCS 28