doc/userguide/rules/sdp-keywords.rst
The SDP keywords are implemented as sticky buffers and can be used to match on fields in SDP messages.
======================================== ================== Keyword Direction ======================================== ================== sdp.origin Both sdp.session_name Both sdp.session_info Both sdp.uri Both sdp.email Both sdp.connection_data Both sdp.bandwidth Both sdp.time Both sdp.repeat_time Both sdp.timezone Both sdp.encryption_key Both sdp.attribute Both sdp.media.media Both sdp.media.session_info Both sdp.media.connection_data Both sdp.media.encryption_key Both ======================================== ==================
This keyword matches on the originator found in an SDP request or response.
Syntax
::
sdp.origin; content:<origin>;
Where <origin> is an originator that follows the SDP Origin (o=) scheme.
Examples
::
sdp.origin; content:"SIPPS 105015165 105015162 IN IP4 192.168.1.2";
This keyword matches on the session name found in an SDP request or response.
Syntax
::
sdp.session_name; content:<session_name>;
Where <session_name> is a name that follows the SDP Session name (s=) scheme.
Examples
::
sdp.session_name; content:"SIP call";
This keyword matches on the session information found in an SDP request or response.
Syntax
::
sdp.session_info; content:<session_info>;
Where <session_info> is a description that follows the SDP Session information (i=) scheme.
Examples
::
sdp.session_info; content:"Session Description Protocol";
This keyword matches on the URI found in an SDP request or response.
Syntax
::
sdp.uri; content:<uri>;
Where <uri> is a URI (u=) that the follows the SDP scheme.
Examples
::
sdp.uri; content:"https://www.sdp.proto"
This keyword matches on the email found in an SDP request or response.
Syntax
::
sdp.email; content:<email>
Where <email> is an email address (e=) that follows the SDP scheme.
Examples
::
sdp.email; content:"[email protected] (Jane Doe)";
This keyword matches on the phone number found in an SDP request or response.
Syntax
::
sdp.phone_number; content:<phone_number>
Where <phone_number> is a phone number (p=) that follows the SDP scheme.
Examples
::
sdp.phone_number; content:"+1 617 555-6011 (Jane Doe)";
This keyword matches on the connection found in an SDP request or response.
Syntax
::
sdp.connection_data; content:<connection_data>;
Where <connection_data> is a connection (c=) that follows the SDP scheme.
Examples
::
sdp.connection_data; content:"IN IP4 192.168.1.2"
This keyword matches on the bandwidths found in an SDP request or response.
Syntax
::
sdp.bandwidth; content:<bandwidth>
Where <bandwidth> is a bandwidth (b=) that follows the SDP scheme.
Example
::
sdp.bandwidth; content:"AS:64"
This keyword matches on the time found in an SDP request or response.
Syntax
::
sdp.time; content:<time>
Where <time> is a time (t=) that follows the SDP scheme.
Example
::
sdp.time; content:"3034423619 3042462419"
This keyword matches on the repeat time found in an SDP request or response.
Syntax
::
sdp.repeat_time; content:<repeat_time>
Where <repeat_time> is a repeat time (r=) that follows the SDP scheme.
Example
::
sdp.repeat_time; content:"604800 3600 0 90000"
This keyword matches on the timezone found in an SDP request or response.
Syntax
::
sdp.timezone; content:<timezone>
Where <timezone> is a timezone (z=) that follows the SDP scheme.
Example
::
sdp.timezone; content:"2882844526 -1h 2898848070 0"
This keyword matches on the encryption key found in an SDP request or response.
Syntax
::
sdp.encryption_key; content:<encryption_key>
Where <encryption_key> is a key (k=) that follows the SDP scheme.
Example
::
sdp.encryption_key; content:"prompt"
This keyword matches on the attributes found in an SDP request or response.
Syntax
::
sdp.attribute; content:<attribute>
Where <attribute> is an attribute (a=) that follows the SDP scheme.
Example
::
sdp.attribute; content:"sendrecv"
This keyword matches on the Media subfield of a Media description field found in an SDP request or response.
Syntax
::
sdp.media.media; content:<media>
Where <media> is a media (m=) that follows the SDP scheme.
Example
::
sdp.media.media; content:"audio 30000 RTP/AVP 0 8 97 2 3"
This keyword matches on the Session information subfield of a Media description field found in an SDP request or response.
Syntax
::
sdp.media.session_info; content:<session_info>
Where <session_info> is a description (i=) that follows the SDP scheme.
Example
::
sdp.media.session_info; content:"Session Description Protocol"
This keyword matches on the Connection data subfield of a Media description field found in an SDP request or response.
Syntax
::
sdp.media.connection_data; content:<connection_data>
Where <connection_data> is a connection (c=) that follows the SDP scheme.
Example
::
sdp.media.connection_data; content:"IN IP4 192.168.1.2"
This keyword matches on the Encryption key subfield of a Media description field found in an SDP request or response.
Syntax
::
sdp.media.encryption_key; content:<encryption_key>
Where <encryption_key> is a key (k=) that follows the SDP scheme.
Example
::
sdp.media.encryption_key; content:"prompt"