Amendments on July 31, 2022
Amendments on July 21, 2022
Instead of free(ptr), use xfree(&ptr) and after it calls
DisposePtr(ptr), it will update ptr to point at NULL to catch
When MALLOC_DEBUG is defined, each allocation is added to a
list, and removed when freed. If it's not in the list at free
time, it's a double-free. Also, instead of pointing pointers at
NULL, point them to a pre-defined block of zeroes and in the
idle loop, periodically check that this block is still zero. This
will also catch use-after-frees in a more reliable (but costly)
Amendments on July 11, 2022
This doesn't really need to be portable, just call session functions
Reduce state timeouts to 10 seconds, but leave at 30 for the initial
Init state when receiving to give the user time to choose a file to
Fix IAC escaping on the way out.
Since our output and input functions will bypass the telnet code that
escapes or unescapes IACs, add an option to do it here before
interfacing with the send/recv routines.
Interoperability testing with SyncTERM showed that it was too eager
to timeout when we didn't respond fast enough in acceping uploaded
data and writing it, so disable overlapping I/O. This way it won't
send more data to us until we've acked it.
Amendments on July 4, 2022
Lots of internal restructuring by me to keep all state within a
zmodem_session object with callbacks to network/modem functions to
actually do the data sending and receiving.