Table of Contents
List of Tables
List of Examples
db_mode parameterThe module implements a simplified database engine based on text files. It can be used by OpenSIPS DB interface instead of other database module (like MySQL).
The module is meant for use in demos or small devices that do not support other DB modules. It keeps everything in memory and if you deal with large amount of data you may run quickly out of memory. Also, it has not implemented all standard database facilities (like order by), it includes minimal functionality to work properly with OpenSIPS
NOTE: the timestamp is printed in an integer value from time_t structure. If you use it in a system that cannot do this conversion, it will fail (support for such situation is in to-do list).
NOTE: even when is in non-caching mode, the module does not write back to hard drive after changes. In this mode, the module checks if the corresponding file on disk has changed, and reloads it. The write on disk happens at OpenSIPS shut down.
The db_text database system architecture:
a database is represented by a directory in the local file system. NOTE: when you use db_text in OpenSIPS, the database URL for modules must be the path to the directory where the table-files are located, prefixed by “text://”, e.g., “text:///var/dbtext/opensips”. If there is no “/” after “text://” then “CFG_DIR/” is inserted at the beginning of the database path. So, either you provide an absolute path to database directory or a relative one to “CFG_DIR” directory.
a table is represented by a text file inside database directory.
First line is the definition of the columns. Each column must be declared as follows:
the name of column must not include white spaces.
the format of a column definition is: name(type,attr).
between two column definitions must be a white space, e.g., “first_name(str) last_name(str)”.
the type of a column can be:
int - integer numbers.
double - real numbers with two decimals.
str - strings with maximum size of 4KB.
a column can have one of the attributes:
auto - only for 'int' columns, the maximum value in that column is incremented and stored in this field if it is not provided in queries.
null - accept null values in column fields.
if no attribute is set, the fields of the column cannot have null value.
each other line is a row with data. The line ends with “\n”.
the fields are separated by “:”.
no value between two ':' (or between ':' and start/end of a row) means “null” value.
next characters must be escaped in strings: “\n”, “\r”, “\t”, “:”.
0 -- the zero value must be escaped too.
Example 1.1. Sample of a db_text table
... id(int,auto) name(str) flag(double) desc(str,null) 1:nick:0.34:a\tgood\: friend 2:cole:-3.75:colleague 3:bob:2.50: ...
Example 1.2. Minimal OpenSIPS location db_text table definition
... username(str) contact(str) expires(int) q(double) callid(str) cseq(int) ...
Example 1.3. Minimal OpenSIPS subscriber db_text table example
... username(str) password(str) ha1(str) domain(str) ha1b(str) suser:supasswd:xxx:alpha.org:xxx ...
None.
Set caching mode (0) or non-caching mode (1). In caching mode, data is loaded at startup. In non-caching mode, the module check every time a table is requested whether the corresponding file on disk has changed, and if yes, will re-load table from file.
Default value is “0”.
Write back to hard drive modified tables.
Name: dbt_dump.
Parameters: none
MI FIFO Command Format:
:dbt_dump:_reply_fifo_file_ _empty_line_
Causes db_text module to reload cached tables from disk. Depending on parameters it could be a whole cache or a specified database or a single table. If any table cannot be reloaded from disk - the old version preserved and error reported.
Name: dbt_reload.
Parameters:
db_name (optional) - database name to reload.
table_name (optional, but cannot be present without the db_name parameter) - specific table to reload.
MI FIFO Command Format:
:dbt_reload:_reply_fifo_file_ _empty_line_
:dbt_reload:_reply_fifo_file_ /path/to/dbtext/database _empty_line_
:dbt_reload:_reply_fifo_file_ /path/to/dbtext/database table_name _empty_line_
Compile the module and load it instead of mysql or other DB modules.
REMINDER: when you use db_text in OpenSIPS, the database URL for modules must be the path to the directory where the table-files are located, prefixed by “text://”, e.g., “text:///var/dbtext/opensips”. If there is no “/” after “text://” then “CFG_DIR/” is inserted at the beginning of the database path. So, either you provide an absolute path to database directory or a relative one to “CFG_DIR” directory.
Example 1.5. Load the db_text module
...
loadmodule "/path/to/opensips/modules/db_text.so"
...
modparam("module_name", "database_URL", "text:///path/to/dbtext/database")
...
Here are the definitions for most important table as well as a basic configuration file to use db_text with OpenSIPS. The table structures may change in time and you will have to adjust next examples.
You have to populate the table 'subscriber' by hand with user profiles in order to have authentication. To use with the given configuration file, the table files must be placed in the '/tmp/opensipsdb' directory.
Example 1.6. Definition of 'subscriber' table (one line)
... username(str) domain(str) password(str) first_name(str) last_name(str) phone(str) email_address(str) datetime_created(int) datetime_modified(int) confirmation(str) flag(str) sendnotification(str) greeting(str) ha1(str) ha1b(str) perms(str) allow_find(str) timezone(str,null) rpid(str,null) ...
Example 1.7. Definition of 'location' and 'aliases' tables (one line)
... username(str) domain(str,null) contact(str,null) received(str) expires(int,null) q(double,null) callid(str,null) cseq(int,null) last_modified(str) flags(int) user_agent(str) socket(str) ...
Example 1.8. Definition of 'version' table and sample records
... table_name(str) table_version(int) subscriber:3 location:6 aliases:6 ...
Example 1.9. Configuration file
...
#
# simple quick-start config script with dbtext
#
# ----------- global configuration parameters ------------------------
#debug_mode=yes
children=4
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
listen=udp:10.100.100.1:5060
# ------------------ module loading ----------------------------------
# use dbtext database
loadmodule "modules/dbtext/dbtext.so"
loadmodule "modules/sl/sl.so"
loadmodule "modules/tm/tm.so"
loadmodule "modules/rr/rr.so"
loadmodule "modules/maxfwd/maxfwd.so"
loadmodule "modules/usrloc/usrloc.so"
loadmodule "modules/registrar/registrar.so"
loadmodule "modules/textops/textops.so"
loadmodule "modules/textops/mi_fifo.so"
# modules for digest authentication
loadmodule "modules/auth/auth.so"
loadmodule "modules/auth_db/auth_db.so"
# ----------------- setting module-specific parameters ---------------
# -- mi_fifo params --
modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
# -- usrloc params --
# use dbtext database for persistent storage
modparam("usrloc", "db_mode", 2)
modparam("usrloc|auth_db", "db_url", "text:///tmp/opensipsdb")
# -- auth params --
#
modparam("auth_db", "calculate_ha1", 1)
modparam("auth_db", "password_column", "password")
modparam("auth_db", "user_column", "username")
modparam("auth_db", "domain_column", "domain")
# ------------------------- request routing logic -------------------
# main routing logic
route{
# initial sanity checks -- messages with
# max_forwards==0, or excessively long requests
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
};
if (msg:len >= max_len ) {
sl_send_reply("513", "Message too big");
exit;
};
# we record-route all messages -- to make sure that
# subsequent messages will go through our proxy; that's
# particularly good if upstream and downstream entities
# use different transport protocol
if (!method=="REGISTER") record_route();
# subsequent messages withing a dialog should take the
# path determined by record-routing
if (loose_route()) {
# mark routing logic in request
append_hf("P-hint: rr-enforced\r\n");
route(1);
exit;
};
if (!uri==myself) {
# mark routing logic in request
append_hf("P-hint: outbound\r\n");
route(1);
exit;
};
# if the request is for other domain use UsrLoc
# (in case, it does not work, use the following command
# with proper names and addresses in it)
if (uri==myself) {
if (method=="REGISTER") {
# digest authentication
if (!www_authorize("", "subscriber")) {
www_challenge("", "0");
exit;
};
save("location");
exit;
};
lookup("aliases");
if (!uri==myself) {
append_hf("P-hint: outbound alias\r\n");
route(1);
exit;
};
# native SIP destinations are handled using our USRLOC DB
if (!lookup("location")) {
sl_send_reply("404", "Not Found");
exit;
};
};
append_hf("P-hint: usrloc applied\r\n");
route(1);
}
route[1]
{
# send it out now; use stateful forwarding as it works reliably
# even for UDP2TCP
if (!t_relay()) {
sl_reply_error();
};
}
...
Once you have the module loaded, you can use the API specified by OpenSIPS DB interface.
Table 3.1. Top contributors by DevScore(1), authored commits(2) and lines added/removed(3)
| Name | DevScore | Commits | Lines ++ | Lines -- | |
|---|---|---|---|---|---|
| 1. | Daniel-Constantin Mierla (@miconda) | 134 | 59 | 6126 | 1441 |
| 2. | Bogdan-Andrei Iancu (@bogdan-iancu) | 39 | 30 | 307 | 307 |
| 3. | Henning Westerholt (@henningw) | 25 | 15 | 252 | 410 |
| 4. | Liviu Chircu (@liviuchircu) | 11 | 8 | 28 | 65 |
| 5. | Razvan Crainea (@razvancrainea) | 10 | 8 | 99 | 33 |
| 6. | Jan Janak (@janakj) | 10 | 7 | 124 | 106 |
| 7. | Ovidiu Sas (@ovidiusas) | 6 | 4 | 51 | 8 |
| 8. | Sergey Khripchenko | 5 | 2 | 185 | 2 |
| 9. | Jiri Kuthan (@jiriatipteldotorg) | 4 | 2 | 8 | 6 |
| 10. | Ionut Ionita (@ionutrazvanionita) | 4 | 2 | 4 | 2 |
All remaining contributors: Konstantin Bokarius, Razvan Pistolea, Chris Heiser, Norman Brandinger (@NormB), Edson Gellert Schubert, Dusan Klinec, Andrei Pelinescu-Onciul.
(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)
(2) including any documentation-related commits, excluding merge commits. Regarding imported patches/code, we do our best to count the work on behalf of the proper owner, as per the "fix_authors" and "mod_renames" arrays in opensips/doc/build-contrib.sh. If you identify any patches/commits which do not get properly attributed to you, please submit a pull request which extends "fix_authors" and/or "mod_renames".
(3) ignoring whitespace edits, renamed files and auto-generated files
Table 3.2. Most recently active contributors(1) to this module
| Name | Commit Activity | |
|---|---|---|
| 1. | Bogdan-Andrei Iancu (@bogdan-iancu) | Nov 2003 - Jun 2018 |
| 2. | Liviu Chircu (@liviuchircu) | Mar 2014 - Jun 2018 |
| 3. | Ovidiu Sas (@ovidiusas) | Dec 2012 - Jan 2017 |
| 4. | Razvan Crainea (@razvancrainea) | Oct 2011 - Nov 2016 |
| 5. | Dusan Klinec | Dec 2015 - Dec 2015 |
| 6. | Sergey Khripchenko | Aug 2015 - Aug 2015 |
| 7. | Ionut Ionita (@ionutrazvanionita) | Jan 2015 - Feb 2015 |
| 8. | Razvan Pistolea | Jul 2009 - Jul 2009 |
| 9. | Henning Westerholt (@henningw) | Aug 2007 - Mar 2009 |
| 10. | Daniel-Constantin Mierla (@miconda) | Feb 2003 - May 2008 |
All remaining contributors: Konstantin Bokarius, Chris Heiser, Edson Gellert Schubert, Norman Brandinger (@NormB), Jan Janak (@janakj), Jiri Kuthan (@jiriatipteldotorg), Andrei Pelinescu-Onciul.
(1) including any documentation-related commits, excluding merge commits
Last edited by: Bogdan-Andrei Iancu (@bogdan-iancu), Liviu Chircu (@liviuchircu), Sergey Khripchenko, Ovidiu Sas (@ovidiusas), Daniel-Constantin Mierla (@miconda), Konstantin Bokarius, Edson Gellert Schubert, Henning Westerholt (@henningw).
doc copyrights:
Copyright © 2003-2004 FhG FOKUS