-
The Xprint Module
Elena-Ramona Modroiu
Asipto
Copyright © 2003 FhG FOKUS
- _________________________________________________________________
+ __________________________________________________________________
Table of Contents
4. Functions
- 4.1. xplog(level, format)
- 4.2. xpdbg(format)
+ 4.1. xplog(level, format)
+ 4.2. xpdbg(format)
2. Developer Guide
1.1. Functions
- 1.1.1. int xbind(xl_api_t *xl_api)
- 1.1.2. int xparse(char *s, xl_elog_p *el)
- 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
- 1.1.4. int xparse2(char *s, xl_elog_p *el,
- xl_parse_cb cb)
+ 1.1.1. int xbind(xl_api_t *xl_api)
+ 1.1.2. int xparse(char *s, xl_elog_p *el)
+ 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
+ 1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb
+ cb)
1.1.5. int shm_xparse2(char *s, xl_elog_p *el,
- xl_parse_cb cb)
+ xl_parse_cb cb)
- 1.1.6. xfree(xl_elog_p el)
- 1.1.7. shm_xfree(xl_elog_p el)
+ 1.1.6. xfree(xl_elog_p el)
+ 1.1.7. shm_xfree(xl_elog_p el)
1.1.8. int xprint(struct sip_msg* msg, xl_elog_p el,
- char *buf, int *len)
+ char *buf, int *len)
- 1.1.9. str *xnulstr()
+ 1.1.9. str *xnulstr()
List of Examples
4. Functions
- 4.1. xplog(level, format)
- 4.2. xpdbg(format)
+ 4.1. xplog(level, format)
+ 4.2. xpdbg(format)
1. Overview
- IMPORTANT: this is former xlog module from SIP Express Router (SER)
- kept because it is used by other modules via API to get the value for
- strings with specifiers. If you want to print log messages from
+ IMPORTANT: this is former xlog module from SIP Express Router (SER)
+ kept because it is used by other modules via API to get the value for
+ strings with specifiers. If you want to print log messages from
configuration file, use the real module named 'xlog'.
- This module provides the possibility to print user formatted log or
- debug messages from SER scripts, similar to printf function but now a
- specifier is replaced with a part of the SIP request. Section 2,
+ This module provides the possibility to print user formatted log or
+ debug messages from SER scripts, similar to printf function but now a
+ specifier is replaced with a part of the SIP request. Section 2,
"Implemented Specifiers" shows what can be printed out.
2. Implemented Specifiers
* %ci : call-id
* %cs : cseq
* %ct : contact header
- * %Cxy : color printing based on escape sequences (x - foreground
- color, y - background color). The values for colors: x - default
- color of the terminal; s - Black; r - Red; g - Green; y - Yellow;
- b - Blue; p - Purple; c - Cyan; w - White
+ * %Cxy : color printing based on escape sequences (x - foreground
+ color, y - background color). The values for colors: x - default
+ color of the terminal; s - Black; r - Red; g - Green; y - Yellow; b
+ - Blue; p - Purple; c - Cyan; w - White
* %ds : destination set
* %fu : 'From' uri
* %ft : 'From' tag
- * %Hn : host's hostname (if system hostname is FQDN, part before
+ * %Hn : host's hostname (if system hostname is FQDN, part before
first .)
* %Hd : host's domain (if system hosntame is FQDN, part behind first
.)
* %rr : reply's reason
* %rs : reply's status
* %rt : 'Refer-To' uri
- * %Ri : IP address of the interface where the request has been
+ * %Ri : IP address of the interface where the request has been
received
* %Rp : received port
* %si : IP source address
* %ua : User agent header field
* %uq : unique id (per SER's process) - to make really unique id use
%uq-%px-%mx or %uq-%px-%Tx
- * %{name[N]} : print the body of the Nth header identified by
- 'name'. If [N] is omitted then the body of the first header is
- printed. The first header is got when N=0, for the second N=1,
- a.s.o. To print the last header of that type, use -1, no other
- negative values are supported now. No white spaces are allowed
- inside the specifier (before }, before or after {, [, ] symbols).
- When N='*', all headers of that type are printed.
- The module should identify most of compact header names (the ones
+ * %{name[N]} : print the body of the Nth header identified by 'name'.
+ If [N] is omitted then the body of the first header is printed. The
+ first header is got when N=0, for the second N=1, a.s.o. To print
+ the last header of that type, use -1, no other negative values are
+ supported now. No white spaces are allowed inside the specifier
+ (before }, before or after {, [, ] symbols). When N='*', all
+ headers of that type are printed.
+ The module should identify most of compact header names (the ones
recognized by ser which should be all at this moment), if not, the
compact form has to be specified explicitely. It is recommended to
- use dedicated specifiers for headers (e.g., %ua for user agent
+ use dedicated specifiers for headers (e.g., %ua for user agent
header), if they are available -- they are faster.
* %<name[N]> : print the value of AVP optionally %indexed by the [N]
value It uses AVPs subindexing, e.g. if you don't specify subindex
and there are more AVPs with the same name, the result is NULL. To
- specify first AVP use [1], negative values are indexes counted
+ specify first AVP use [1], negative values are indexes counted
backward through the list.
- * %@select.framework[N].value : print the value of select framework
- call. For detailed info what calls are available see select
+ * %@select.framework[N].value : print the value of select framework
+ call. For detailed info what calls are available see select
framework documentation (and modules documentation, as modules can
extend select framework calls).
* %| or %(space) : end of %@select.framework identifier. If you need
- to concatenate select framework call and another non-whitespace
- literal, you need to explicitelly set the end of the select
+ to concatenate select framework call and another non-whitespace
+ literal, you need to explicitelly set the end of the select
framework identifier.
- E.g. %@ruri.user%|@%@ruri.host converts all featured request uri
+ E.g. %@ruri.user%|@%@ruri.host converts all featured request uri
into user@host form only.
3. Parameters
4. Functions
- 4.1. xplog(level, format)
- 4.2. xpdbg(format)
+ 4.1. xplog(level, format)
+ 4.2. xpdbg(format)
-4.1. xplog(level, format)
+4.1. xplog(level, format)
Print a formated message using LOG function.
xplog("L_ERR", "time [%Tf] method <%rm> r-uri <%ru> 2nd via <%{via[1]}>\n");
...
-4.2. xpdbg(format)
+4.2. xpdbg(format)
Print a formatted message using DBG function.
1.1. Functions
- 1.1.1. int xbind(xl_api_t *xl_api)
- 1.1.2. int xparse(char *s, xl_elog_p *el)
- 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
- 1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
+ 1.1.1. int xbind(xl_api_t *xl_api)
+ 1.1.2. int xparse(char *s, xl_elog_p *el)
+ 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
+ 1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
1.1.5. int shm_xparse2(char *s, xl_elog_p *el, xl_parse_cb
- cb)
+ cb)
- 1.1.6. xfree(xl_elog_p el)
- 1.1.7. shm_xfree(xl_elog_p el)
+ 1.1.6. xfree(xl_elog_p el)
+ 1.1.7. shm_xfree(xl_elog_p el)
1.1.8. int xprint(struct sip_msg* msg, xl_elog_p el, char
- *buf, int *len)
+ *buf, int *len)
- 1.1.9. str *xnulstr()
+ 1.1.9. str *xnulstr()
1. Module API
1.1. Functions
- 1.1.1. int xbind(xl_api_t *xl_api)
- 1.1.2. int xparse(char *s, xl_elog_p *el)
- 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
- 1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
- 1.1.5. int shm_xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
- 1.1.6. xfree(xl_elog_p el)
- 1.1.7. shm_xfree(xl_elog_p el)
+ 1.1.1. int xbind(xl_api_t *xl_api)
+ 1.1.2. int xparse(char *s, xl_elog_p *el)
+ 1.1.3. int shm_xparse(char *s, xl_elog_p *el)
+ 1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
+ 1.1.5. int shm_xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
+ 1.1.6. xfree(xl_elog_p el)
+ 1.1.7. shm_xfree(xl_elog_p el)
1.1.8. int xprint(struct sip_msg* msg, xl_elog_p el, char *buf,
- int *len)
+ int *len)
- 1.1.9. str *xnulstr()
+ 1.1.9. str *xnulstr()
1.1. Functions
-1.1.1. int xbind(xl_api_t *xl_api)
+1.1.1. int xbind(xl_api_t *xl_api)
Bind to the xprint module API.
Meaning of the parameters is as follows:
- * xl_api - structure that the xprint module functions are bind to.
- The functions can be executed as xl_api.xparse(),
+ * xl_api - structure that the xprint module functions are bind to.
+ The functions can be executed as xl_api.xparse(),
xl_api.xprint()...
Return value: 0 - success, <0 - error.
-1.1.2. int xparse(char *s, xl_elog_p *el)
+1.1.2. int xparse(char *s, xl_elog_p *el)
Parse an xl-formatted string in private memory.
Return value: 0 - success, <0 - error.
-1.1.3. int shm_xparse(char *s, xl_elog_p *el)
+1.1.3. int shm_xparse(char *s, xl_elog_p *el)
- Parse an xl-formatted string in shared memory. See xparse() function
+ Parse an xl-formatted string in shared memory. See xparse() function
for details.
-1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
+1.1.4. int xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
- Parse an xl-formatted string in private memory. This function is able
- to identify regular expression back references, for example \1, \2,
- \3... When a back reference is found the callback function is called
- that is supposed to farther parse the back reference and fill in the
+ Parse an xl-formatted string in private memory. This function is able
+ to identify regular expression back references, for example \1, \2,
+ \3... When a back reference is found the callback function is called
+ that is supposed to farther parse the back reference and fill in the
xl_elog structure.
Meaning of the parameters is as follows:
* s - string to be parsed.
* el - returned xl-lib list.
- * cb - callback function for parsing the regular expression back
+ * cb - callback function for parsing the regular expression back
references.
- The prototype of the callback function is: typedef int (*xl_parse_cb)
+ The prototype of the callback function is: typedef int (*xl_parse_cb)
(str *s, int shm, xl_elog_p el);
Parameters of the callback function:
- * s - regular expression back reference to be parsed (without the
+ * s - regular expression back reference to be parsed (without the
leading '\' character).
* shm - indicates whether or not shared memory needs to be used. (1:
shared memory, 0: private memory)
Return value: 0 - success, <0 - error.
-1.1.5. int shm_xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
+1.1.5. int shm_xparse2(char *s, xl_elog_p *el, xl_parse_cb cb)
- Parse an xl-formatted string in shared memory supporting regular
+ Parse an xl-formatted string in shared memory supporting regular
expression back references. See xparse2() function for details.
-1.1.6. xfree(xl_elog_p el)
+1.1.6. xfree(xl_elog_p el)
Free the xl-lib list allocated by xparse() or xparse2().
Meaning of the parameters is as follows:
* el - xl-lib list to be freed.
-1.1.7. shm_xfree(xl_elog_p el)
+1.1.7. shm_xfree(xl_elog_p el)
Free the xl-lib list allocated by shm_xparse() or shm_xparse2().
Meaning of the parameters is as follows:
* el - xl-lib list to be freed.
-1.1.8. int xprint(struct sip_msg* msg, xl_elog_p el, char *buf, int *len)
+1.1.8. int xprint(struct sip_msg* msg, xl_elog_p el, char *buf, int *len)
Evaluate the xl-formatted string and print the result into a buffer.
* msg - SIP message pointer.
* el - xl-lib list to be evaluated.
* buf - pre-allocated buffer that is filled in with the result.
- * len - length of the printed string. len needs to be set to the
+ * len - length of the printed string. len needs to be set to the
maximum length of the result buffer before calling this function.
Return value: 0 - success, <0 - error.
-1.1.9. str *xnulstr()
+1.1.9. str *xnulstr()
Return the string "<null>".
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