Smalls improvements

[apps/agl-service-can-low-level.git] / low-can-binding / utils / socketcan-bcm.cpp

diff --git a/low-can-binding/utils/socketcan-bcm.cpp b/low-can-binding/utils/socketcan-bcm.cpp
index d1fd8e0..3f3a096 100644 (file)
--- a/low-can-binding/utils/socketcan-bcm.cpp
+++ b/low-can-binding/utils/socketcan-bcm.cpp
@@ -74,14 +74,22 @@ namespace utils
        {
                struct utils::bcm_msg msg;
 
-               ::memset(&msg, 0, sizeof(msg));
                const struct sockaddr_can& addr = s.get_tx_address();
                socklen_t addrlen = sizeof(addr);
                struct ifreq ifr;
 
                ssize_t nbytes = ::recvfrom(s.socket(), &msg, sizeof(msg), 0, (struct sockaddr*)&addr, &addrlen);
+               if(nbytes < 0)
+               {
+                       AFB_ERROR("Can't read the next message from socket '%d'. '%s'", s.socket(), strerror(errno));
+                       return s;
+               }
                ifr.ifr_ifindex = addr.can_ifindex;
-               ioctl(s.socket(), SIOCGIFNAME, &ifr);
+               if(ioctl(s.socket(), SIOCGIFNAME, &ifr) < 0)
+               {
+                       AFB_ERROR("Can't read the interface name. '%s'", strerror(errno));
+                       return s;
+               }
                long unsigned int frame_size = nbytes-sizeof(struct bcm_msg_head);
 
                AFB_DEBUG("Data available: %li bytes read. BCM head, opcode: %i, can_id: %i, nframes: %i", frame_size, msg.msg_head.opcode, msg.msg_head.can_id, msg.msg_head.nframes);