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doc 040000
Makefile 100644 385B
README 100644 8.02kB
api.c 100644 1.03kB
api.h 100644 1.13kB
domain.c 100644 6.7kB
domain.h 100644 1.9kB
domain_mod.c 100644 8.29kB
domain_mod.h 100644 2.04kB
hash.c 100644 2.94kB
hash.h 100644 1.24kB
mi.c 100644 1.89kB
mi.h 100644 1.17kB
README
Domain Module Juha Heinanen <jh@tutpro.com> Edited by Juha Heinanen <jh@tutpro.com> Copyright © 2002-2008 Juha Heinanen __________________________________________________________________ Table of Contents 1. Admin Guide 1. Overview 2. Dependencies 3. Exported Parameters 3.1. db_url (string) 3.2. db_mode (integer) 3.3. domain_table (string) 3.4. domain_col (string) 3.5. register_myself (integer) 4. Exported Functions 4.1. is_from_local() 4.2. is_uri_host_local() 4.3. is_domain_local(pseudo_variable) 5. Exported MI Functions 5.1. domain_reload 5.2. domain_dump 6. Exported RPC Commands 6.1. domain.reload 6.2. domain.dump 7. Known Limitations 2. Developer Guide 1. Available Functions 1.1. is_domain_local(domain) List of Examples 1.1. Setting db_url parameter 1.2. db_mode example 1.3. Setting domain_table parameter 1.4. Setting domain_col parameter 1.5. register_myself example 1.6. is_from_local usage 1.7. is_uri_host_local usage 1.8. is_domain_local usage Chapter 1. Admin Guide Table of Contents 1. Overview 2. Dependencies 3. Exported Parameters 3.1. db_url (string) 3.2. db_mode (integer) 3.3. domain_table (string) 3.4. domain_col (string) 3.5. register_myself (integer) 4. Exported Functions 4.1. is_from_local() 4.2. is_uri_host_local() 4.3. is_domain_local(pseudo_variable) 5. Exported MI Functions 5.1. domain_reload 5.2. domain_dump 6. Exported RPC Commands 6.1. domain.reload 6.2. domain.dump 7. Known Limitations 1. Overview Domain module implements checks that based on domain table determine if a host part of an URI is “local” or not. A “local” domain is one that the proxy is responsible for. Domain module operates in caching or non-caching mode depending on value of module parameter db_mode. In caching mode domain module reads the contents of domain table into cache memory when the module is loaded. After that domain table is re-read only when module is given domain_reload fifo command. Any changes in domain table must thus be followed by “domain_reload” command in order to reflect them in module behavior. In non-caching mode domain module always queries domain table in the database. Caching is implemented using a hash table. The size of the hash table is given by HASH_SIZE constant defined in domain_mod.h. Its “factory default” value is 128. 2. Dependencies The module depends on the following modules (in the other words the listed modules must be loaded before this module): * database -- Any database module 3. Exported Parameters 3.1. db_url (string) 3.2. db_mode (integer) 3.3. domain_table (string) 3.4. domain_col (string) 3.5. register_myself (integer) 3.1. db_url (string) This is URL of the database to be used. Default value is “mysql://openserro:openserro@localhost/openser” Example 1.1. Setting db_url parameter modparam("domain", "db_url", "mysql://ser:pass@db_host/ser") 3.2. db_mode (integer) Database mode: 0 means non-caching, 1 means caching. Default value is 0 (non-caching). Example 1.2. db_mode example modparam("domain", "db_mode", 1) # Use caching 3.3. domain_table (string) Name of table containing names of local domains that the proxy is responsible for. Local users must have in their sip uri a host part that is equal to one of these domains. Default value is “domain”. Example 1.3. Setting domain_table parameter modparam("domain", "domain_table", "new_name") 3.4. domain_col (string) Name of column containing domains in domain table. Default value is “domain”. Example 1.4. Setting domain_col parameter modparam("domain", "domain_col", "domain_name") 3.5. register_myself (integer) Register the list of domains to match 'myself' check: 0 means no myself registration, 1 means enable myself registration. Default value is 0 (disable). Example 1.5. register_myself example modparam("domain", "register_myself", 1) 4. Exported Functions 4.1. is_from_local() 4.2. is_uri_host_local() 4.3. is_domain_local(pseudo_variable) 4.1. is_from_local() Checks based on domain table if host part of From header uri is one of the local domains that the proxy is responsible for This function can be used from REQUEST_ROUTE. Example 1.6. is_from_local usage ... if (is_from_local()) { ... }; ... 4.2. is_uri_host_local() If called from route or failure route block, checks based on domain table if host part of Request-URI is one of the local domains that the proxy is responsible for. If called from branch route, the test is made on host part of URI of first branch, which thus must have been appended to the transaction before is_uri_host_local() is called. This function can be used from REQUEST_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE. Example 1.7. is_uri_host_local usage ... if (is_uri_host_local()) { ... }; ... 4.3. is_domain_local(pseudo_variable) This function checks if the domain contained in the pseudo_variable is local. This function is a generalized form of the is_from_local() and is_uri_host_local() functions, being able to completely replace them and also extends them by allowing the domain to be taken from any of the above mentioned sources. The following equivalences exist: * is_domain_local("$rd") is same as is_uri_host_local() * is_domain_local("$fd") is same as is_from_local() This function can be used from REQUEST_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE. Example 1.8. is_domain_local usage ... if (is_domain_local("$rd")) { ... }; if (is_domain_local("$fd")) { ... }; if (is_domain_local("$avp(some_avp_alias)")) { ... }; if (is_domain_local("$avp(i:850)")) { ... }; if (is_domain_local("$avp(s:some_avp)")) { ... }; ... 5. Exported MI Functions 5.1. domain_reload 5.2. domain_dump 5.1. domain_reload Causes domain module to re-read the contents of domain table into cache memory. Name: domain_reload Parameters: none MI FIFO Command Format: :domain_reload:_reply_fifo_file_ _empty_line_ 5.2. domain_dump Causes domain module to dump hash indexes and domain names in its cache memory. Name: domain_dump Parameters: none MI FIFO Command Format: :domain_dump:_reply_fifo_file_ _empty_line_ 6. Exported RPC Commands 6.1. domain.reload 6.2. domain.dump 6.1. domain.reload Causes domain module to re-read the contents of domain table into cache memory. Name: domain.reload Parameters: none Example: sercmd domain.reload 6.2. domain.dump Causes domain module to dump domain names in its cache memory. Name: domain.dump Parameters: none Example: sercmd domain.dump 7. Known Limitations There is an unlikely race condition on domain list update. If a process uses a table, which is reloaded at the same time twice through FIFO, the second reload will delete the original table still in use by the process. Chapter 2. Developer Guide Table of Contents 1. Available Functions 1.1. is_domain_local(domain) The module provides is_domain_local API function for use by other Kamailio modules. 1. Available Functions 1.1. is_domain_local(domain) 1.1. is_domain_local(domain) Checks if domain given in str* parameter is local. The function returns 1 if domain is local and -1 if domain is not local or if an error occurred.