Changes:
* Implement patty_timer type to store both a struct timeval and a
bitfield for indicating timer state; currently, this only holds
the PATTY_TIMER_RUNNING flag to indicate whether a timer has been
stopped (irrespective of its "expired" status)
* Remove 'target' argument from patty_timer_start(); instead, rely
on select() polling every 1s to cause events to trigger at a
regular interval
* Make patty_timer_expired() return false if PATTY_TIMER_RUNNING is
not set
* Implement patty_timer_stop() to clear the PATTY_TIMER_RUNNING flag
of a timer
* Make patty_timer_clear() set all fields to zero, including
clearing the PATTY_TIMER_RUNNING flag
Fix incorrect control P/F encoding in src/sock.c wherein the P/F flag
value was passed to patty_ax25_sock_send() as an information field body
length, rather than the pf argument for the internal functions
control_i(), control_s(), and control_u(); this corrects the following
functions:
* patty_ax25_sock_send_rr()
* patty_ax25_sock_send_rnr()
* patty_ax25_sock_send_rej()
Implement AX.25 v2.2 Section 6.7.1.2 "Response Delay Timer T2" as per
specification; do not acknowledge several sequential I frames until a
certain period of time has passed since the receipt of the most recent I
frame
In patty_ax25_sock_send(), only use a numbered TX slot in the ring
buffer when sending I frames, rather than the prior case when the frame
was not a U frame
Fix patty_timer_start() to only set the running timer to the value of
the timer being started, rather than adding the value of the started
timer to the running timer
Changes:
* Make ./configure generate src/config.h, which will contain the
appropriate #include for endian.h, or #defines to provide
alternatives
* Make sure to include config.h in src/frame.c to allow compiling
on macOS
Fix patty_kiss_tnc_new_fd() to only attempt tcgetattr()/tcsetattr() on
file descriptors for whom isatty() is true, allowing files and sockets
to once again be used
Changes:
* Implement patty_timer_expired() to determine if a timer has
expired or has gone negative
* Implement patty_timer_cancel() to set a timer to zero
* Implement patty_timer_start() to initialize a timer, add a
specified number of milliseconds, and ensure a target timer (such
as the server timer) is set for at least that value as well
* Implement patty_timer_tick() to subtract an elapsed time value
from a timer
* Remove functions specific to each timer in src/sock.c, as those
can now be handled generically by src/timer.c
* Replace calls to patty_ax25_sock_timer_t1_*() with patty_timer_*()
calls instead; reference the struct timeval objects directly
within the sock (for the time being, pending opaque structures)
Changes:
* Combine patty_ax25_sock_ack_timer_restart() and _set() into one
method, patty_ax25_sock_ack_timer_start(), which accepts a new
struct timeval argument to potentially add the Timer T1 value to
* Reorder some functions in src/sock.c, include/patty/ax25/sock.h
Changes:
* Implement patty_ax25_sock_timeR_ack_restart() to initialize the
XID/SABM/SABME ack Timer T1
* Implement patty_ax25_sock_timer_ack_cancel() to clear Timer T1
* Implement patty_ax25_sock_timer_ack_sub() to subtract the value of
a struct timeval from Timer T1
* Implement patty_ax25_sock_timer_ack_expired() to indicate if the
ack Timer T1 has expired
Other changes:
* Rearrange patty_ax25_sock a bit
Changes:
* Use cfmakeraw() to set raw TTY attributes in KISS TNC constructor
patty_kiss_tnc_new_fd()
* Restore previous TTY attributes in patty_kiss_tnc_destroy()
Begin to reimplement patty_ax25_sock_reset() to follow the AX.25 v2.2
Specification, Section 6.5 "Resetting Procedure" indications to set V(S)
and V(R) to 0
Rename patty_ax25_sock_reset() to patty_ax25_sock_init(), so as to allow
for the implementation of a future _reset() method which shall be used
to implement AX.25 v2.2 Section 6.5 "Resetting Procedure"
Changes:
* Make patty_ax25_sock_send_rr() accept a P/F flag value
* Make patty_ax25_sock_send_rnr() accept a P/F flag value
* Make patty_ax25_sock_send_rej() accept a P/F flag value
After performing XID parameter negotiation, do not simply use the
negotiated TX buffer size when allocating the RX buffer; this resolves
an issue wherein read()s into the RX buffer (allocated with a size equal
to the TX buffer, which may be smaller) would cause memory errors
Changes:
* Allow REJ handling to occur when the V(S) send state counter wraps
to a value lower than indicated in the frame N(R) field
* Fix tx_slot() in src/sock.c to not buffer overflow when the TX
window is less than the maximum for the SABM/SABME mode
Changes:
* Add an enum patty_ax25_version argument to the function
patty_ax25_sock_upgrade() to allow upgrading a socket to a certain
set of AX.25 defaults
Changes:
* Implement and use respond_accept() and respond_connect()
convenience methods instead of stack allocating response objects,
populating them, and using write() to send them to the client
* When receiving XID frames in response to either an accept() or
connect() call, respond to the client if any of the parameters
sent from the peer are not compatible with a socket or interface,
with the appropriate errno value
Changes:
* Improve patty_ax25_sock_params_set() validation by setting ENOTSUP
when setting options on a socket that don't make sense, such as no
Asynchronous Balanced Mode
Changes:
* Make patty_ax25_sock_send() set ENETDOWN when no network interface
is associated with a sock
* Make patty_ax25_sock_send() set EBADF when no remote address is
associated with a sock
Keep distinct default Classes of Procedures parameter flag values for
sockets and interfaces, as the Asynchronous Balanced Mode parameter does
not apply to the interface itself, and the Half/Full Duplex parameters
do not apply to the sock
Changes:
* Make bind() validate that no other socket has the same
callsign/SSID bound to a listening socket, emitting EADDRINUSE if
one already exists
* Make bind() validate that no address is already bound to the
socket, emitting EINVAL otherwise
Changes:
* Add a "pending disconnect" state to enum patty_ax25_sock_state
(PATTY_AX25_SOCK_PENDING_DISCONNECT), used when an originating
system sends a DISC frame, pending a UA response
* When handling a UA frame, rather than terminating a socket in the
established state implicitly, check for a "pending disconnect"
state explicitly
Other changes:
* When a remote socket has already been obtained in handle_frame()
in src/server.c, pass that socket to any other method that would
otherwise be looking up the same socket
Changes:
* Don't use a separate dict for keeping track of sockets pending
accept and sockets pending connect; rely more on the semantic
meaning of the enum patty_ax25_sock_status values
* Ensure DISC frames are acknowledged by UA frames
* Ensure a receiving system only shuts down a connection after
receiving a UA frame in response to a sent DISC frame
* Ensure a sending system only shuts down a connection just prior to
sending a UA frame in response to a received DISC frame
* Don't use the P/F flag for the connection management U frames;
implicitly assume the P/F flag is set to 1, and always send frames
with a true P/F flag
Changes:
* Replace patty_ax25_sock member 'buf' with 'tx_buf' and 'rx_buf'
for transmitting or receiving single, non-sequential packets
* Make patty_ax25_sock_upgrade() reallocate all I/O buffers based on
window size and MTU/MRU, useful when entering SABME mode
Changes:
* Modify patty_ax25_sock_send_xid() to require the 'cr' argument,
which specifies whether the frame address field is to be encoded
with the 'command' or 'response' bits set as appropriate
