00dfe93a0d
uses threads it probably is a very good idea (some funny things seen with Linux 2.4.18 kernel & RTP proxy - gethostbyname() did return a NULL result but has h_errno set to 0 "every fine, thanks") Future will show it this helps. - Had overlooked one inet_aton in register.c - replaced to utils_inet_aton - Fixed a compiler warning in log.c for Solaris. Siproxd now at least builds on Solaris (tested on: SunOS 5.9 sun4u sparc SUNW,Ultra-60)
55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
TODOs, in random order:
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=======================
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- siproxd daemonized: looks like clashes between threads
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- lost 200 ACK immediately before RTP starts...
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- TERM handler
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- /var/run PID file
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- check via loop and private IP addresses
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can comment be used to store a unique ID in there?
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- multiple inbound interfaces - do I need to be aware of inbound at all?
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- Documentation (yeah, yeah...)
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- general security issues
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- security tests for received SIP messages (function securitycheck)
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- automagically create a proper config file during install
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- get_ip_by_host: reduce DNS timeouts (seems to be a more complex problem...)
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- via loop detection: send 482 error code
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- support Record-Route header
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- feature: don't bind to 0.0.0.0 address, but only to inbound/outbound IF's
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(defined by IFNAME)
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- support IPTABLES for RTP proxying -> use libiptc
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- rtpproxy_masq:
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RACE CONDITIONS! A slot may be timed out, even if the actual
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masquerading tunnel is still active. A following new
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INVITE then tries to use the believed free port -> Buh
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- Can we poll (/proc/something) to figure out if the tunnel
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is still active before deleting? This would require knowledge
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of the text layout in /proc/xxx.
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- are there some other possibilities (netfilter/libiptc)?
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- introduce some kind of connection STATE to the proxy table.
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Timeout based discarding only is active for non-established.
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An INVITE would set the STATE to CONNECTING, the following
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ACK to CONNECTED. A CONNECTED entry can only be deleted by
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a BYE or CANCEL.
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- NETFILTER: during startup (RTP initialization) siproxd should
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clean left over entries that are within the RTP proxy port range
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- NETFILTER masquerading:
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it looks like it is not possible to create an entry in the
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ip_conntrack table from an userspace application. How do we proceed?
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We just might insert/delete DNAT entries in the PREROUTE NAT table.
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This the means that we must implement a connection state into the
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proxy table.
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