[OpenSBC] Configurable Host Access List now available

[Joegen E. B. <joe...@gm...>]

Hi Everyone,

I have added a new configuration section "Host Access List" for OpenSBC 
that allows only certain IP address to send calls to OpenSBC.   It can 
accept a list of single IP addresses or a network block.  There  are 
only two parameters in this page

1.  Trust All Hosts - Flag whether OpenSBC would accept INVITEs from ANY 
host from the internet. If this flag is set to TRUE OpenSBC will only 
accept calls from the IP Addresses or Range listed.
2.  Hosts - Entry for host can be a single IP Address or a range. 
Example: 192.168.0.1 or 10.0.0.1-10.0.0.255

If the Access List is enabled and a call came in from an unknown host, 
OpenSBC will answer with a forbidden with a Warning header.  A sample of 
such response is below:

SIP/2.0 403 Forbidden
From: "unknown" <sip:20...@pb...>;tag=172561562940
To:  <sip:10...@pb...>;tag=de055ec348fa18109fd8d5d74376c6ed
Via: SIP/2.0/UDP 
127.0.0.1:1000;iid=5050;branch=z9hG4bKc0a800990000005847557d8900000c8200000117;rport=1000;received=192.168.120.1
CSeq: 1 INVITE
Call-ID: E7335922-1B42-4670-817A-EE1FEFC337EC@192.168.0.153
Server: OpenSIPStack-1.1.7-18
Warning: 399 192.168.120.1 Is Not Allowed In Our Access List
Content-Length: 0

Joegen