1.1.1. Known Limitations

search ignores folded lines. For example, search("(From|f):.*@foo.bar") doesn't match the following From header field:

From: medabeda 
 <sip:medameda@foo.bar>;tag=1234

1.2.1. SER Modules

The following modules must be loaded before this module:

• No dependencies on other SER modules.

1.2.2. External Libraries or Applications

The following libraries or applications must be installed before running SER with this module loaded:

• None.

1.3.1. search(re)

Searches for the re in the message.

Meaning of the parameters is as follows:

• re - Regular expression.

...
if ( search("[Ss][Ee][Rr]" ) { /*....*/ };
...

1.3.2. search_append(re, txt)

Searches for the first match of re and appends txt after it.

Meaning of the parameters is as follows:

• re - Regular expression.

• txt - String to be appended.

...
search_append("[Ss]er", " blabla");
...

1.3.3. replace(re, txt)

Replaces the first occurence of re with txt.

Meaning of the parameters is as follows:

• re - Regular expression.

• txt - String.

...
replace("ser", "Sip Express Router");
...

1.3.4. subst('/re/repl/flags')

Replaces re with repl (sed or perl like).

Meaning of the parameters is as follows:

• '/re/repl/flags' - sed like regular expression. flags can be a combination of i (case insensitive), g (global) or s (match newline don't treat it as end of line).

...
# replace the uri in to: with the message uri (just an example)
if ( subst('/^To:(.*)sip:[^@]*@[a-zA-Z0-9.]+(.*)$/t:\1\u\2/ig') ) {};
...

1.3.5. subst_uri('/re/repl/flags')

Runs the re substitution on the message uri (like subst but works only on the uri)

Meaning of the parameters is as follows:

• '/re/repl/flags' - sed like regular expression. flags can be a combination of i (case insensitive), g (global) or s (match newline don't treat it as end of line).

...
# adds 3463 prefix to numeric uris, and save the original uri (\0 match)
# as a parameter: orig_uri (just an example)
if (subst_uri('/^sip:([0-9]+)@(.*)$/sip:3463\1@\2;orig_uri=\0/i')){$

...

1.3.6. append_to_reply(txt)

Append txt to the reply.

Meaning of the parameters is as follows:

• txt - String.

...
append_to_reply("Foo: bar\r\n");
...

1.3.7. append_hf(hf)

Appends txt after the last header field.

Meaning of the parameters is as follows:

• hf - Header field to be appended.

...
append_hf("P-hint: VOICEMAIL\r\n");
...

1.3.8. append_urihf(prefix, suffix)

Append header field name with original Request-URI in middle.

Meaning of the parameters is as follows:

• prefix - string (usually at least header field name).

• suffix - string (usually at least line terminator).

...
append_urihf("CC-Diversion: ", "\r\n");
...

1.3.9. is_present_hf(hf_name)

Return true if a header field is present in message.

Takes header field names "as is" and doesn't distinguish compact names.

Meaning of the parameters is as follows:

• hf_name - Header field name.

...
if (is_present_hf("From")) log(1, "From HF Present");
...