While the code layout comes from ptp-proposal, this is a different
package, now called pptp for "Portable PTP".
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

<arch/arch.h> already defined the four network converters, so this
removes pp_htons and the other ones.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

This fixes the "ppi->ch.fd" using the two descriptors
in the new net_path structure. It also istantiates a static
net_patch to avoid malloc in the freestanding environment.

The program is not linking because some functions called by
the protocol are still missing in this architecture.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Since we have two file descriptors (channels) in pp_instance, but current
code opens one socket only, use it in both places as a temporary measure.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

This removes <dep/dep.h> by renaming it to <pproto/lib.h>, since those
functions are library ones, though pp_ prefixed.

<pproto/pproto.h> includes <pproto/lib.h>, since they are always needed,
and C files are fixed by not including <dep/dep.h>. Sometimes I included
<pproto/diag.h> to fix some compile warnings for implicit declaration of
pp_printf.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

With this patch, the whole ptp protocol state machine has been analyzed
and mostly included in the ptp-wr project.

fixes a warning on return type

fix for coherency with ptpd: if announce timer expires and our clock can not
act as master, the state must be put back to LISTENING

state-passive.c and state-slave.c now use the same st_com_handle_pdelay_req
for PPM_PDELAY_REQ messages handling.

state-slave.c: only missing some servo functions and msg issue
pproto.h: shortened some variable names

minor fixes and comments updated elsewhere

With new compilers (e.g., Debian 6) the resulting binary
was not starting because there's an extra section before .text

state-listening: go to FAULTY if received an announce of uncorrect
length
all states: use switch/case to analyse the incoming msg type

Patch coming from ptp-proposal (author: Alessandro Rubini)
Some distributions (e.g: ubuntu-lucid) use the stack protector by
default. This disables it so arch-bare-linux can compile and run.
The option is present at least from gcc-4.2, but 4.0 and ealier ones
are known not to accept it.