Improve debug messages

diff --git a/src/net/udp.c b/src/net/udp.c
index 8a23a1e70b8b8b69589f3b5611ad84b282a7056d..7966de09898105519e33f890d749dd82ea96845f 100644 (file)
--- a/src/net/udp.c
+++ b/src/net/udp.c
@@ -64,8 +64,11 @@ int udp_open ( struct udp_connection *conn, uint16_t local_port ) {
        }
 
        /* Attempt bind to local port */
-       if ( ( rc = udp_bind ( conn, local_port ) ) != 0 )
+       if ( ( rc = udp_bind ( conn, local_port ) ) != 0 ) {
+               DBGC ( conn, "UDP %p could not bind to local port %d: %s\n",
+                      conn, local_port, strerror ( rc ) );
                return rc;
+       }
 
        /* Add to UDP connection list */
        list_add ( &conn->list, &udp_conns );
@@ -122,6 +125,10 @@ int udp_senddata ( struct udp_connection *conn ) {
 
        rc = conn->udp_op->senddata ( conn, conn->tx_pkb->data, 
                                      pkb_tailroom ( conn->tx_pkb ) );
+       if ( rc != 0 ) {
+               DBGC ( conn, "UDP %p application could not send packet: %s\n",
+                      conn, strerror ( rc ) );
+       }
 
        if ( conn->tx_pkb ) {
                free_pkb ( conn->tx_pkb );
@@ -146,6 +153,7 @@ int udp_sendto_via ( struct udp_connection *conn, struct sockaddr_tcpip *peer,
                     size_t len ) {
                struct udp_header *udphdr;
        struct pk_buff *pkb;
+       int rc;
 
        /* Use precreated packet buffer if one is available */
        if ( conn->tx_pkb ) {
@@ -183,7 +191,14 @@ int udp_sendto_via ( struct udp_connection *conn, struct sockaddr_tcpip *peer,
               ntohs ( udphdr->len ) );
 
        /* Send it to the next layer for processing */
-       return tcpip_tx ( pkb, &udp_protocol, peer, netdev, &udphdr->chksum );
+       if ( ( rc = tcpip_tx ( pkb, &udp_protocol, peer, netdev,
+                              &udphdr->chksum ) ) != 0 ) {
+               DBGC ( conn, "UDP %p could not transmit packet: %s\n",
+                      conn, strerror ( rc ) );
+               return rc;
+       }
+
+       return 0;
 }
 
 /**
@@ -301,6 +316,10 @@ static int udp_rx ( struct pk_buff *pkb, struct sockaddr_tcpip *st_src,
        /* Pass data to application */
        rc = conn->udp_op->newdata ( conn, pkb->data, pkb_len ( pkb ),
                                     st_src, st_dest );
+       if ( rc != 0 ) {
+               DBGC ( conn, "UDP %p application rejected packet: %s\n",
+                      conn, strerror ( rc ) );
+       }
 
  done:
        free_pkb ( pkb );