Van Jacobson TCP header compression only apply if TCP is enabled,
therefore we need to disable VJ compression if TCP is disabled.
We already have conditions to enforce VJ disabling if IPv4 is disabled
or if PPPoS is disabled, add TCP to those conditions and remove
unecessary VJ_SUPPORT && LWIP_TCP conditions.
Unfortunately, there is no standard way to declare a pointer with
potentially unaligned accesses. The only portable way is to create
packed struct.
VJ support uses optimized accesses to IP and TCP struct to check a
whole part of them at once to speed up the (de)compressor.
This commit wrap potentially unaligned *u16_t and *u32_t accesses with
packed struct so all compilers are able to deal with them properly.
Closes: #48308
We used to modify in place the packet payload during compression but TCP
stack requires that we don't change the packet payload, therefore we now
copy the whole packet before compression.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
Prepare for VJ packet copy, reorder a bit VJ compressor so all TYPE_IP
return value are within the same code block. We do that because we don't
need to copy the packet if we are not able to compress it.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
long type on LP64/ILP64 systems (such as x86_64 on Linux) is 8 byte
long, this leads to wrong offsets in packets header calculation.
Fixed it by using u32_t lwIP type instead of long type.
Signed-off-by: Sylvain Rochet <gradator@gradator.net>
ip_addr_t is used for all generic IP addresses for the API, ip(4/6)_addr_t are only used internally or when initializing netifs or when calling version-related functions
PPPoE works, PPPoS code is not ported at all.
I am using the RP-PPPoE server to do my tests using the following
configuration:
$ cat /etc/ppp/pppoe-server-options
debug
login
lcp-echo-interval 10
lcp-echo-failure 10
ms-dns 192.168.4.130
ms-dns 192.168.4.231
netmask 255.255.255.0
defaultroute
noipdefault
usepeerdns
$ cat /etc/ppp/allip
192.168.4.1-200
$ pppoe-server -C isp -L 192.168.4.254 -p /etc/ppp/allip -I tap0
Plus the usual auth-lines in /etc/ppp/pap-secrets and
/etc/ppp/chap-secrets .
And the unix port minimal "echo" project slightly modified to use
the "tcpip" API, so with threads, which I am going to commit with
NO_SYS as a -Dmacro.
It still use some of the linux'ism, such as syslog() and crypt(),
I do not want to drop the syslog() supports at the moment, this is
pretty useful to debug, and we may just convert the way the syslog() is
done to provide a trace feature to our PPP users, as a compile-time
option.
