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| Original file line number | Diff line number | Diff line change |
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| RTJSON Module | ||
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| Daniel-Constantin Mierla | ||
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| <miconda@gmail.com> | ||
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| Edited by | ||
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| Daniel-Constantin Mierla | ||
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| <miconda@gmail.com> | ||
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| Copyright © 2015 asipto.com | ||
| __________________________________________________________________ | ||
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| Table of Contents | ||
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| 1. Admin Guide | ||
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| 1. Overview | ||
| 2. Dependencies | ||
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| 2.1. Kamailio Modules | ||
| 2.2. External Libraries or Applications | ||
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| 3. Parameters | ||
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| 3.1. xavp_cfg (str) | ||
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| 4. Functions | ||
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| 4.1. rtjson_init_routes(rtdoc) | ||
| 4.2. rtjson_push_routes() | ||
| 4.3. rtjson_next_route() | ||
| 4.4. rtjson_update_branch() | ||
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| 5. JSON Routing Structure | ||
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| List of Examples | ||
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| 1.1. Set xavp_cfg parameter | ||
| 1.2. rtjson_init_routes usage | ||
| 1.3. rtjson_push_routes usage | ||
| 1.4. rtjson_next_route usage | ||
| 1.5. rtjson_update_branch usage | ||
| 1.6. JSON Routing Structure | ||
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| Chapter 1. Admin Guide | ||
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| Table of Contents | ||
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| 1. Overview | ||
| 2. Dependencies | ||
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| 2.1. Kamailio Modules | ||
| 2.2. External Libraries or Applications | ||
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| 3. Parameters | ||
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| 3.1. xavp_cfg (str) | ||
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| 4. Functions | ||
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| 4.1. rtjson_init_routes(rtdoc) | ||
| 4.2. rtjson_push_routes() | ||
| 4.3. rtjson_next_route() | ||
| 4.4. rtjson_update_branch() | ||
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| 5. JSON Routing Structure | ||
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| 1. Overview | ||
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| This module facilitates SIP routing based on JSON specifications. | ||
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| The values for R-URI ($ru), outbound proxy ($du) and other attributes | ||
| used for SIP routing can be retrieved in a JSON document. It is able to | ||
| process attributes for more than one destination and prepare for | ||
| routing in serial or parallel fashion. | ||
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| 2. Dependencies | ||
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| 2.1. Kamailio Modules | ||
| 2.2. External Libraries or Applications | ||
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| 2.1. Kamailio Modules | ||
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| The following modules must be loaded before this module: | ||
| * tm - (optional) transaction management. | ||
| uac - (optional) user agent operations. | ||
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| 2.2. External Libraries or Applications | ||
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| The following libraries or applications must be installed before | ||
| running Kamailio with this module loaded: | ||
| * None | ||
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| 3. Parameters | ||
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| 3.1. xavp_cfg (str) | ||
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| 3.1. xavp_cfg (str) | ||
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| The name of the xavp to be used internally by the module. | ||
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| Default value is "rtjson". | ||
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| Example 1.1. Set xavp_cfg parameter | ||
| ... | ||
| modparam("rtjson", "xavp_cfg", "myxavp") | ||
| ... | ||
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| 4. Functions | ||
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| 4.1. rtjson_init_routes(rtdoc) | ||
| 4.2. rtjson_push_routes() | ||
| 4.3. rtjson_next_route() | ||
| 4.4. rtjson_update_branch() | ||
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| 4.1. rtjson_init_routes(rtdoc) | ||
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| Initialize routing based on JSON document stored in rtdoc parameter. | ||
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| The rtdoc parameter can be a static string or a dynamic string value | ||
| with config variables. It has to result in a valid JSON document with | ||
| the structure specified in chapter 'JSON Routing Structure'. | ||
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| This function can be used from REQUEST_ROUTE. | ||
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| Example 1.2. rtjson_init_routes usage | ||
| ... | ||
| rtjson_init_routes("$var(json)"); | ||
| ... | ||
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| 4.2. rtjson_push_routes() | ||
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| Push the routes given in JSON document to rtjson_init_routes(rtdoc) to | ||
| the internal fields used by Kamailio for routing. | ||
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| This function can be used from REQUEST_ROUTE. | ||
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| Example 1.3. rtjson_push_routes usage | ||
| ... | ||
| rtjson_init_routes("$var(json)"); | ||
| rtjson_push_routes(); | ||
| ... | ||
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| 4.3. rtjson_next_route() | ||
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| To be used in failure_route for serial forking, to push the next route | ||
| to the internal fields used by Kamailio for routing. | ||
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| This function can be used from FAILURE_ROUTE. | ||
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| Example 1.4. rtjson_next_route usage | ||
| ... | ||
| rtjson_init_routes("$var(json)"); | ||
| rtjson_push_routes(); | ||
| t_on_failure("REROUTE"); | ||
| t_relay(); | ||
| ... | ||
| failure_route[REROUTE] { | ||
| rtjson_next_route(); | ||
| } | ||
| ... | ||
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| 4.4. rtjson_update_branch() | ||
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| To be used in branch_route if the JSON document had attributes that | ||
| needs to be set for each branch. | ||
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| This function can be used from BRANCH_ROUTE. | ||
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| Example 1.5. rtjson_update_branch usage | ||
| ... | ||
| rtjson_init_routes("$var(json)"); | ||
| rtjson_push_routes(); | ||
| t_on_branch("OUTGOING"); | ||
| t_relay(); | ||
| ... | ||
| branch_route[OUTGOING] { | ||
| rtjson_update_branch(); | ||
| } | ||
| ... | ||
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| 5. JSON Routing Structure | ||
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| The format of the JSON document containing routing information. | ||
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| Description of the fields in the JSON routing document: | ||
| * version - intended to enforce versioning checks (not enforced yet), | ||
| recommended to be set to "1.0". | ||
| * routing - can be "serial" or "parallel", corresponding to desired | ||
| routing type: serial or parallel forking. | ||
| * routes - an array with structures holding the attributes for | ||
| destinations. The attributes can be: | ||
| + uri - request URI | ||
| + dst_uri - outbound proxy URI | ||
| + path - Path URI vector | ||
| + socket - local socket | ||
| + headers - a structure with values for headers From and To | ||
| specified as display name and URI, plus extra headers to be | ||
| appended to SIP request. It requires uac module in order to | ||
| update From and To headers. Set by rtjson_update_branch() only | ||
| for serial routing. | ||
| + branch_flags - branch flags. Set by rtjson_update_branch() | ||
| only for serial routing. | ||
| + fr_timer - value for fr_timer parameter of tm module. Set by | ||
| rtjson_update_branch() only for serial routing. | ||
| + fr_inv_timer - value for fr_inv_timer parameter of tm module. | ||
| Set by rtjson_update_branch() only for serial routing. | ||
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| Other fields can appear in the JSON routing document, being ignored by | ||
| rtjson functions. They can be processed directly in the configuration | ||
| files using json or jansson modules. For example, the document can | ||
| include the transaction identification tuple (index,label) that can be | ||
| used to resume the execution of a suspended transaction. | ||
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| Example 1.6. JSON Routing Structure | ||
| ... | ||
| { | ||
| "version": "1.0", | ||
| "routing": "serial", | ||
| "routes": [ | ||
| { | ||
| "uri": "sip:127.0.0.1:5080", | ||
| "dst_uri": "sip:127.0.0.1:5082", | ||
| "path": "<sip:127.0.0.1:5084>, <sip:127.0.0.1:5086>", | ||
| "socket": "udp:127.0.0.1:5060", | ||
| "headers": { | ||
| "from": { | ||
| "display": "Alice", | ||
| "uri": "sip:alice@127.0.0.1" | ||
| }, | ||
| "to": { | ||
| "display": "Alice", | ||
| "uri": "sip:alice@127.0.0.1" | ||
| }, | ||
| "extra": "X-Hdr-A: abc\r\nX-Hdr-B: bcd\r\n" | ||
| }, | ||
| "branch_flags": 8, | ||
| "fr_timer": 5000, | ||
| "fr_inv_timer": 30000 | ||
| }, | ||
| { | ||
| "uri": "sip:127.0.0.1:5080", | ||
| "dst_uri": "sip:127.0.0.1:5082", | ||
| "path": "<sip:127.0.0.1:5084>, <sip:127.0.0.1:5086>", | ||
| "socket": "udp:127.0.0.1:5060", | ||
| "headers": { | ||
| "from": { | ||
| "display": "Alice", | ||
| "uri": "sip:alice@127.0.0.1" | ||
| }, | ||
| "to": { | ||
| "display": "Alice", | ||
| "uri": "sip:alice@127.0.0.1" | ||
| }, | ||
| "extra": "X-Hdr-A: abc\r\nX-Hdr-B: bcd\r\n" | ||
| }, | ||
| "branch_flags": 8, | ||
| "fr_timer": 5000, | ||
| "fr_inv_timer": 30000 | ||
| } | ||
| ] | ||
| } | ||
| ... |