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@@ -15,6 +15,108 @@ Juha Heinanen
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Revision $Revision$ $Date$
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__________________________________________________________________
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+ 1.1. Overview
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+ 1.2. Serial Forking Based on Q Value
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+ 1.3. Known Issues
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+ 1.4. Parameters
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+
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+ 1.4.1. fr_timer (integer)
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+ 1.4.2. fr_inv_timer (integer)
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+ 1.4.3. max_inv_lifetime (integer)
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+ 1.4.4. max_noninv_lifetime (integer)
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+ 1.4.5. wt_timer (integer)
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+ 1.4.6. delete_timer (integer)
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+ 1.4.7. retr_timer1 (integer)
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+ 1.4.8. retr_timer2 (integer)
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+ 1.4.9. noisy_ctimer (integer)
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+ 1.4.10. restart_fr_on_each_reply (integer)
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+ 1.4.11. auto_inv_100 (integer)
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+ 1.4.12. auto_inv_100_reason (string)
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+ 1.4.13. unix_tx_timeout (integer)
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+ 1.4.14. aggregate_challenges (integer)
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+ 1.4.15. reparse_invite (integer)
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+ 1.4.16. ac_extra_hdrs (string)
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+ 1.4.17. blst_503 (integer)
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+ 1.4.18. blst_503_def_timeout (integer)
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+ 1.4.19. blst_503_min_timeout (integer)
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+ 1.4.20. blst_503_max_timeout (integer)
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+ 1.4.21. blst_methods_add (unsigned integer)
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+ 1.4.22. blst_methods_lookup (unsigned integer)
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+ 1.4.23. cancel_b_method (integer)
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+ 1.4.24. reparse_on_dns_failover (integer)
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+ 1.4.25. on_sl_reply (string)
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+ 1.4.26. fr_inv_timer_next (integer)
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+ 1.4.27. contacts_avp (string)
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+ 1.4.28. fr_timer_avp (string)
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+ 1.4.29. fr_inv_timer_avp (string)
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+ 1.4.30. unmatched_cancel (string)
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+ 1.4.31. ruri_matching (integer)
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+ 1.4.32. via1_matching (integer)
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+ 1.4.33. pass_provisional_replies (integer)
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+ 1.4.34. default_code (integer)
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+ 1.4.35. default_reason (string)
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+ 1.4.36. disable_6xx_block (integer)
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+ 1.4.37. local_ack_mode (integer)
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+
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+ 1.5. Functions
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+
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+ 1.5.1. t_relay_to_udp(ip, port), t_relay_to_udp(),
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+ t_relay_to_tcp(ip, port) t_relay_to_tcp()
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+ t_relay_to_tls(ip, port) t_relay_to_tls()
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+ t_relay_to_sctp(ip, port) t_relay_to_sctp()
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+
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+ 1.5.2. t_relay() t_relay(host, port)
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+ 1.5.3. t_on_failure(failure_route)
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+ 1.5.4. t_on_reply(onreply_route)
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+ 1.5.5. t_on_branch(branch_route)
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+ 1.5.6. append_branch()
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+ 1.5.7. t_newtran()
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+ 1.5.8. t_reply(code, reason_phrase)
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+ 1.5.9. t_lookup_request()
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+ 1.5.10. t_retransmit_reply()
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+ 1.5.11. t_release()
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+ 1.5.12. t_forward_nonack() t_forward_nonack(ip, port)
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+ t_forward_nonack_udp(ip, port) t_forward_nonack_tcp(ip,
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+ port) t_forward_nonack_tls(ip, port)
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+ t_forward_nonack_sctp(ip, port)
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+
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+ 1.5.13. t_set_fr(fr_inv_timeout [, fr_timeout])
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+ 1.5.14. t_reset_fr()
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+ 1.5.15. t_set_max_lifetime(inv_lifetime, noninv_lifetime)
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+ 1.5.16. t_reset_max_lifetime()
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+ 1.5.17. t_set_retr(retr_t1_interval, retr_t2_interval)
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+ 1.5.18. t_reset_retr()
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+ 1.5.19. t_set_auto_inv_100(0|1)
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+ 1.5.20. t_branch_timeout()
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+ 1.5.21. t_branch_replied()
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+ 1.5.22. t_any_timeout()
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+ 1.5.23. t_any_replied()
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+ 1.5.24. t_grep_status("code")
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+ 1.5.25. t_is_canceled()
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+ 1.5.26. t_is_expired()
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+ 1.5.27. t_relay_cancel()
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+ 1.5.28. t_lookup_cancel(), t_lookup_cancel(1)
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+ 1.5.29. t_drop_replies()
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+ 1.5.30. t_save_lumps()
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+ 1.5.31. t_load_contacts()
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+ 1.5.32. t_next_contacts()
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+ 1.5.33. t_check_trans()
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+ 1.5.34. t_set_disable_6xx(0|1)
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+ 1.5.35. t_set_disable_failover(0|1)
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+
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+ 1.6. TM Module API
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+
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+ 1.6.1. Defines
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+ 1.6.2. Functions
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+
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+ 1.6.2.1. register_tmcb(cb_type, cb_func)
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+ 1.6.2.2. load_tm(*import_structure)
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+ 1.6.2.3. int t_suspend(struct sip_msg *msg, unsigned int
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+ *hash_index, unsigned int *label)
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+
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+ 1.6.2.4. int t_continue(unsigned int hash_index, unsigned
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+ int label, struct action *route)
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+
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1.1. Overview
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TM module enables stateful processing of SIP transactions. The main use
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@@ -997,6 +1099,36 @@ modparam("tm", "default_reason", "Unknown reason")
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modparam("tm", "disable_6xx_block", 1)
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...
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+1.4.37. local_ack_mode (integer)
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+
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+ It controls where locally generated ACKs for 2xx replies to local
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+ transactions (transactions created via t_uac*() either thorugh the tm
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+ api or via RPC/mi/fifo) are sent.
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+
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+ It has 3 possible values:
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+ * 0 - the ACK destination is choosen according to the rfc: the next
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+ hop is found using the contact and the route set and then DNS
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+ resolution is used on it.
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+ * 1 - the ACK is sent to the same address as the corresponding INVITE
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+ branch.
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+ * 2 - the ACK is sent to the source of the 2xx reply.
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+
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+Note
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+
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+ Mode 1 and 2 break the rfc, but are useful to deal with some simple UAs
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+ behind the NAT cases (no different routing for the ACK and the contact
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+ contains an address behind the NAT).
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+
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+ The default value is 0 (rfc conformant behaviour).
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+
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+ Can be set at runtime, e.g.:
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+ $ sercmd cfg.set_now_int tm local_ack_mode 0
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+
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+ Example 37. Set local_ack_mode parameter
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+...
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+modparam("tm", "local_ack_mode", 1)
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+...
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+
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1.5. Functions
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Revision History
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@@ -1022,7 +1154,7 @@ t_relay_to_sctp(ip, port) t_relay_to_sctp()
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derived from the message uri (using sip sepcific DNS lookups), but with
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the protocol corresponding to the function name.
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- Example 37. t_relay_to_udp usage
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+ Example 38. t_relay_to_udp usage
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...
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if (src_ip==10.0.0.0/8)
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t_relay_to_udp("1.2.3.4", "5060"); # sent to 1.2.3.4:5060 over udp
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@@ -1049,7 +1181,7 @@ else
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Returns a negative value on failure--you may still want to send a
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negative reply upstream statelessly not to leave upstream UAC in lurch.
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- Example 38. t_relay usage
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+ Example 39. t_relay usage
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...
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if (!t_relay())
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{
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@@ -1078,7 +1210,7 @@ if (!t_relay())
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Meaning of the parameters is as follows:
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* failure_route - Failure route block to be called.
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- Example 39. t_on_failure usage
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+ Example 40. t_on_failure usage
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...
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route {
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t_on_failure("1");
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@@ -1104,7 +1236,7 @@ failure_route[1] {
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Meaning of the parameters is as follows:
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* onreply_route - Onreply route block to be called.
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- Example 40. t_on_reply usage
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+ Example 41. t_on_reply usage
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...
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loadmodule "/usr/local/lib/ser/modules/nathelper.so"
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...
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@@ -1136,7 +1268,7 @@ es');
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Meaning of the parameters is as follows:
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* branch_route - branch route block to be called.
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- Example 41. t_on_branch usage
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+ Example 42. t_on_branch usage
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...
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route {
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t_on_branch("1");
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@@ -1154,7 +1286,7 @@ branch_route[1] {
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Similarly to t_fork_to, it extends destination set by a new entry. The
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difference is that current URI is taken as new entry.
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- Example 42. append_branch usage
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+ Example 43. append_branch usage
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...
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set_user("john");
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t_fork();
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@@ -1169,7 +1301,7 @@ t_relay();
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the only way a script can add a new transaction in an atomic way.
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Typically, it is used to deploy a UAS.
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- Example 43. t_newtran usage
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+ Example 44. t_newtran usage
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...
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if (t_newtran()) {
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log("UAS logic");
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@@ -1188,7 +1320,7 @@ if (t_newtran()) {
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* code - Reply code number.
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* reason_phrase - Reason string.
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- Example 44. t_reply usage
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+ Example 45. t_reply usage
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...
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t_reply("404", "Not found");
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...
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@@ -1201,7 +1333,7 @@ t_reply("404", "Not found");
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none was found. However this is safely (atomically) done using
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t_newtran.
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- Example 45. t_lookup_request usage
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+ Example 46. t_lookup_request usage
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...
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if (t_lookup_request()) {
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...
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@@ -1212,7 +1344,7 @@ if (t_lookup_request()) {
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Retransmits a reply sent previously by UAS transaction.
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- Example 46. t_retransmit_reply usage
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+ Example 47. t_retransmit_reply usage
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...
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t_retransmit_reply();
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...
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@@ -1222,7 +1354,7 @@ t_retransmit_reply();
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Remove transaction from memory (it will be first put on a wait timer to
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absorb delayed messages).
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- Example 47. t_release usage
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+ Example 48. t_release usage
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...
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t_release();
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...
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@@ -1237,7 +1369,7 @@ t_forward_nonack_tls(ip, port) t_forward_nonack_sctp(ip, port)
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* ip - IP address where the message should be sent.
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* port - Port number.
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- Example 48. t_forward_nonack usage
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+ Example 49. t_forward_nonack usage
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...
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t_forward_nonack("1.2.3.4", "5060");
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...
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@@ -1260,7 +1392,7 @@ t_forward_nonack("1.2.3.4", "5060");
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See also: fr_timer, fr_inv_timer, t_reset_fr().
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- Example 49. t_set_fr usage
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+ Example 50. t_set_fr usage
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...
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route {
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t_set_fr(10000); # set only fr invite timeout to 10s
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@@ -1287,7 +1419,7 @@ branch_route[1] {
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See also: fr_timer, fr_inv_timer, t_set_fr.
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- Example 50. t_reset_fr usage
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+ Example 51. t_reset_fr usage
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...
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route {
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...
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@@ -1313,7 +1445,7 @@ route {
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See also: max_inv_lifetime, max_noninv_lifetime, t_reset_max_lifetime.
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- Example 51. t_set_max_lifetime usage
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+ Example 52. t_set_max_lifetime usage
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...
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route {
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if (src_ip=1.2.3.4)
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@@ -1335,7 +1467,7 @@ route {
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See also: max_inv_lifetime, max_noninv_lifetime, t_set_max_lifetime.
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- Example 52. t_reset_max_lifetime usage
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+ Example 53. t_reset_max_lifetime usage
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...
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route {
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...
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@@ -1373,7 +1505,7 @@ route {
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See also: retr_timer1, retr_timer2, t_reset_retr().
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- Example 53. t_set_retr usage
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+ Example 54. t_set_retr usage
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...
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route {
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t_set_retr(250, 0); # set only T1 to 250 ms
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@@ -1400,7 +1532,7 @@ branch_route[1] {
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See also: retr_timer1, retr_timer2, t_set_retr.
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- Example 54. t_reset_retr usage
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+ Example 55. t_reset_retr usage
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...
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route {
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...
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@@ -1416,7 +1548,7 @@ route {
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See also: auto_inv_100.
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- Example 55. t_set_auto_inv_100 usage
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+ Example 56. t_set_auto_inv_100 usage
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...
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route {
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...
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@@ -1430,7 +1562,7 @@ route {
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Returns true if the failure route is executed for a branch that did
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timeout. It can be used only from the failure_route.
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- Example 56. t_branch_timeout usage
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+ Example 57. t_branch_timeout usage
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...
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failure_route[0]{
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if (t_branch_timeout()){
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@@ -1445,7 +1577,7 @@ failure_route[0]{
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receive at least one reply in the past (the "current" reply is not
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taken into account). It can be used only from the failure_route.
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- Example 57. t_branch_replied usage
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+ Example 58. t_branch_replied usage
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...
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failure_route[0]{
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if (t_branch_timeout()){
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@@ -1462,7 +1594,7 @@ failure_route[0]{
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Returns true if at least one of the current transactions branches did
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timeout.
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- Example 58. t_any_timeout usage
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+ Example 59. t_any_timeout usage
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...
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failure_route[0]{
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if (!t_branch_timeout()){
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@@ -1479,7 +1611,7 @@ failure_route[0]{
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receive some reply in the past. If called from a failure or onreply
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route, the "current" reply is not taken into account.
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- Example 59. t_any_replied usage
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+ Example 60. t_any_replied usage
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...
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onreply_route[0]{
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if (!t_any_replied()){
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@@ -1493,7 +1625,7 @@ onreply_route[0]{
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Returns true if "code" is the final reply received (or locally
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generated) in at least one of the current transactions branches.
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- Example 60. t_grep_status usage
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+ Example 61. t_grep_status usage
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...
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onreply_route[0]{
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if (t_grep_status("486")){
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@@ -1506,7 +1638,7 @@ onreply_route[0]{
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Returns true if the current transaction was canceled.
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- Example 61. t_is_canceled usage
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+ Example 62. t_is_canceled usage
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...
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failure_route[0]{
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if (t_is_canceled()){
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@@ -1520,7 +1652,7 @@ failure_route[0]{
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Returns true if the current transaction has already been expired, i.e.
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the max_inv_lifetime/max_noninv_lifetime interval has already elapsed.
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- Example 62. t_is_expired usage
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+ Example 63. t_is_expired usage
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...
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failure_route[0]{
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if (t_is_expired()){
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@@ -1541,7 +1673,7 @@ failure_route[0]{
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CANCELs were successfully sent to the pending branches, true if the
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INVITE was not found, and false in case of any error.
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- Example 63. t_relay_cancel usage
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+ Example 64. t_relay_cancel usage
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if (method == CANCEL) {
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if (!t_relay_cancel()) { # implicit drop if relaying was successful,
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# nothing to do
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@@ -1568,7 +1700,7 @@ if (method == CANCEL) {
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overwritten with the flags of the INVITE. isflagset() can be used to
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check the flags of the previously forwarded INVITE in this case.
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- Example 64. t_lookup_cancel usage
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+ Example 65. t_lookup_cancel usage
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if (method == CANCEL) {
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if (t_lookup_cancel()) {
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log("INVITE transaction exists");
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@@ -1593,7 +1725,7 @@ if (method == CANCEL) {
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branch is added to the transaction, or it is explicitly replied in the
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script!
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- Example 65. t_drop_replies() usage
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+ Example 66. t_drop_replies() usage
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...
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failure_route[0]{
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if (t_check_status("5[0-9][0-9]")){
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@@ -1624,7 +1756,7 @@ failure_route[0]{
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The transaction must be created by t_newtran() before calling
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t_save_lumps().
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- Example 66. t_save_lumps() usage
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+ Example 67. t_save_lumps() usage
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route {
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...
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t_newtran();
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@@ -1694,7 +1826,7 @@ failure_route[1] {
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This function can be used from REQUEST_ROUTE.
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- Example 67. t_load_contacts usage
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+ Example 68. t_load_contacts usage
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...
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if (!t_load_contacts()) {
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sl_send_reply("500", "Server Internal Error - Cannot load contacts");
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@@ -1746,7 +1878,7 @@ if (!t_load_contacts()) {
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especially if you expect to have many serially forked branches. See the
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documentation of that parameter for more details.
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- Example 68. t_next_contacts usage
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+ Example 69. t_next_contacts usage
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...
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# First call after t_load_contacts() when transaction does not exist yet
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# and contacts should be available
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@@ -1810,7 +1942,7 @@ Note
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See also: t_lookup_request(), t_lookup_cancel().
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- Example 69. t_check_trans usage
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+ Example 70. t_check_trans usage
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if ( method == "CANCEL" && !t_check_trans())
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sl_reply("403", "cancel out of the blue forbidden");
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# note: in this example t_check_trans() can be replaced by t_lookup_cancel()
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@@ -1825,7 +1957,7 @@ if ( method == "CANCEL" && !t_check_trans())
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See also: disable_6xx_block.
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- Example 70. t_set_disable_6xx usage
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+ Example 71. t_set_disable_6xx usage
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...
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route {
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...
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@@ -1840,7 +1972,7 @@ route {
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See also: use_dns_failover.
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- Example 71. t_set_disable_failover usage
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+ Example 72. t_set_disable_failover usage
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...
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route {
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...
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Andrei Pelinescu-Onciul