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pptp/l2tp: echo failure improvements
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With incoming l2tp hello there's no need to ask peer for
replies in configured hello-interval, so just postpone it.
Helps against false-positive echo failures with heavily
loaded channels and/or peers.
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With incoming pptp echo request there's no need to ask
peer for replies in configured echo-interval, so just
postpone it. Helps against false-positive echo failures
with heavily loaded channels and/or peers.
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Sent echos counter is overloaded with random icmp id, so
echo-failure setting is either ignored or causes random pptp
channel stops within valid accumulated fail count range, i.e
on the the first fail. Since icmp id is not actually used for
checking, fix issue by dropping overload.
Default echo-failure value is 3, so allow endless echo fails
without channel drop by setting echo-failure to 0.
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After session is freed on our end, kernel doesn't bother with possible
incoming data packets and just passes them to userspace, in turn
they are mistreated as short control packets with corresponding errors.
Since there's no special data packet handling, just ignore them.
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default value for renew-time fixed
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ipv6: nd: add non-/64 prefixes & AdvOnLinkFlag option support
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print parsing
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non-/64 subnets still needs Router Advertimenets for the
default route & RDNSS.
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Assign opt82_ses=ses if shared=0
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to get radius object use session:module("radius") function
radius object provides flollowing functions:
radius:attrs() - returns array of attributes {"name" = NAME, "vendor" = VENDOR|nil}
radius:attr(name[,vendor]) - returns value of attribute (may return multiple results)
Example:
function ip_up(ses)
rad = ses:module("radius")
attrs = rad:attrs()
if attrs then
print("attrs:")
for _,a in pairs(attrs) do
io.write("\t")
if a.vendor then io.write(a.vendor..":") end
io.write(a.name.."=")
print(rad:attr(a.name, a.vendor))
end
end
end
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to access module specific object introduced new function session:module(NAME)
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to lua scripts
session object consists of following functions:
ifname() - interface name
ifindex() - interface ifindex
sid() - Acct-Session-ID
uptime() - session uptime in seconds
username()
ctrl_type() - type of session (pppt/pppoe/l2tp/ipoe)
calling_sid() - Calling-Station-ID
called_sid() - Called-Station-ID
ipv4() - retuns pair (peer address, local address)
ipv6() - ipv6 address or nil
rx_bytes()
tx_bytes()
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Implemented support for lua 5.2/5.3.
To build accel-ppp with exact lua version pass it in -DLUA=x.y, for example -DLUA=5.2 (cmake 3.0 is required for this).
Old style -DLUA=TRUE supports only 5.1 and does not require cmake 3.0.
Also extra lua modules (lua_lpack, lua_bit) took out into separated library luasupp.
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[ppppd-compat]
fork-limit=N
Specifies number of simultaneously running background processes.
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Instead of entering working thread into sleep triton saves machine context and stack on sleep and restores context/stack on wakeup.
This saves costly new thread allocation.
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implemented coinfig reload
changed default value of ip-xxx scripts to be NULL (disabled)
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1 - is high priority queue for Access-Request and Account-Request(Start)
2 - is low priority queue for Account-Request(Alive) and Account-Request(Stop)
This patch intended to prioritize sessions connecting requests over disconnects and interim updates.
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Now, if lcp-echo-timeout is specified this is considered as idle timeout.
So if link is idling (no any packet was received) in specified interval accel-ppp starts to send LCP Echo-Request with lcp-echo-interval period.
If peer responds to echo request new idle period is being started.
If peer does not responds to lcp-echo-failure attempts accel-ppp terminates session with Acct-Terminate-Cause Lost-Carrier.
If lcp-echo-timeout is not specified or equals zero accel-ppp works in old behaviour (unconditionally sends LCP Echo-Request with lcp-echo-interval period).
This patch intended to prevent unexpected sessions termination due to lcp echo loses.
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sessions
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Fixed problem while connecting with clients in which mru not
negotiating lcp option is set
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introduced new config option:
[ipoe]
vendor=Name
this affects to all attributes specified in attr-xxx options
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new config option:
[common]
max-sessions=N
If set then accel-pppd stops reply to new connection requests if total number of sessions (active and starting) is reached specified limit.
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This reverts commit 88a908974b0b2e9c7eee8ad9a8b0b4432e95d167.
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new config option:
[common]
max-sessions=N
If set then accel-pppd stops reply to new connection requests if total number of sessions (active and starting) is reached specified limit.
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