+.TP
+.BI "TUN " ifname " slip eof"
+The SLIP driver encountered end-of-file on its input descriptor.
+Pending data is discarded, and no attempt is made to read any more data
+from that interface ever.
+.TP
+.BI "TUN " ifname " slip escape-end"
+The SLIP driver encountered an escaped `end' marker. This probably
+means that someone's been sending it junk. The erroneous packet is
+discarded, and we hope that we've rediscovered synchronization.
+.TP
+.BI "TUN " ifname " slip bad-escape"
+The SLIP driver encountered a escaped byte it wasn't expecting to see.
+The erroneous packet will be ignored.
+.TP
+.BI "TUN " ifname " slip overflow"
+The SLIP driver gave up reading a packet because it got too large.