[sr-dev] git:andrei/cancel_reason: tm: CANCEL reason header on/off switches
Andrei Pelinescu-Onciul
andrei at iptel.org
Wed Mar 3 15:06:11 CET 2010
Module: sip-router
Branch: andrei/cancel_reason
Commit: 984eec800fcab256ce46ee03729374aee7c44617
URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=984eec800fcab256ce46ee03729374aee7c44617
Author: Andrei Pelinescu-Onciul <andrei at iptel.org>
Committer: Andrei Pelinescu-Onciul <andrei at iptel.org>
Date: Wed Mar 3 14:57:43 2010 +0100
tm: CANCEL reason header on/off switches
Config support (both runtime and modparam) for turning on/off
Reason header support in locally generated or end-to-end
hop-by-hop CANCELs:
- local_cancel_reason = 0|1. Default 1 (on).
- e2e_cancel_reason= 0|1. (Default 1 (on).
End-to-end CANCEL reason header copy can also be turned on/off on
a per transaction basis: t_set_no_e2e_cancel_reason(0|1).
E.g.:
t_set_no_e2e_cancel_reason(1); # disable reason copy
t_relay();
t_set_no_e2e_cancel_reason(0) can be used to enable reason header
on a per transaction basis, if the default is disabled
(e2e_cancel_reason is set to 0).
---
modules/tm/config.c | 19 ++++++++++++++-----
modules/tm/config.h | 9 +++++----
modules/tm/h_table.h | 8 ++++----
modules/tm/t_lookup.c | 2 ++
modules/tm/t_msgbuilder.c | 22 ++++++++++++++--------
modules/tm/tm.c | 27 +++++++++++++++++++++------
6 files changed, 60 insertions(+), 27 deletions(-)
diff --git a/modules/tm/config.c b/modules/tm/config.c
index b715d03..8a4e456 100644
--- a/modules/tm/config.c
+++ b/modules/tm/config.c
@@ -24,10 +24,9 @@
* 2008-02-05 adapting tm module for the configuration framework (Miklos)
*/
-/*!
- * \file
- * \brief TM :: Configuration
- * \ingroup tm
+/** TM :: Runtime configuration variables.
+ * @file
+ * @ingroup tm
*/
@@ -94,7 +93,11 @@ struct cfg_group_tm default_tm_cfg = {
1, /* cancel_b_method used for e2e and 6xx cancels*/
1, /* reparse_on_dns_failover */
0, /* disable_6xx, by default off */
- 0 /* local_ack_mode, default 0 (rfc3261 conformant) */
+ 0, /* local_ack_mode, default 0 (rfc3261 conformant) */
+ 1, /* local_cancel_reason -- add Reason header to locally generated
+ CANCELs; on by default */
+ 1 /* e2e_cancel_reason -- copy the Reason headers from incoming CANCELs
+ into the corresp. hop-by-hop CANCELs, on by default */
};
void *tm_cfg = &default_tm_cfg;
@@ -196,5 +199,11 @@ cfg_def_t tm_cfg_def[] = {
" it is not set to 0 but allows dealing with NATed contacts in some "
"simple cases)"
},
+ {"local_cancel_reason", CFG_VAR_INT | CFG_ATOMIC, 0, 1, 0, 0,
+ "if set to 1, a Reason header is added to locally generated CANCELs"
+ " (see RFC3326)" },
+ {"e2e_cancel_reason", CFG_VAR_INT | CFG_ATOMIC, 0, 1, 0, 0,
+ "if set to 1, Reason headers from received CANCELs are copied into"
+ " the corresponding generated hop-by-hop CANCELs"},
{0, 0, 0, 0, 0, 0}
};
diff --git a/modules/tm/config.h b/modules/tm/config.h
index ed65acf..b740ec4 100644
--- a/modules/tm/config.h
+++ b/modules/tm/config.h
@@ -21,10 +21,9 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-/*!
- * \file
- * \brief TM :: Configuration
- * \ingroup tm
+/** TM :: Runtime configuration variables.
+ * @file
+ * @ingroup tm
*/
@@ -136,6 +135,8 @@ struct cfg_group_tm {
int reparse_on_dns_failover;
int disable_6xx;
int local_ack_mode;
+ int local_cancel_reason;
+ int e2e_cancel_reason;
};
extern struct cfg_group_tm default_tm_cfg;
diff --git a/modules/tm/h_table.h b/modules/tm/h_table.h
index 1c1cd2d..ad7c3d7 100644
--- a/modules/tm/h_table.h
+++ b/modules/tm/h_table.h
@@ -40,10 +40,9 @@
* inlined often used functions (andrei)
*/
-/*!
- * \file
- * \brief TM ::
- * \ingroup tm
+/** TM :: hash table, flags and other general defines.
+ * @file
+ * @ingroup tm
*/
@@ -281,6 +280,7 @@ struct totag_elem {
#define T_DISABLE_6xx (1<<8) /* treat 6xx as a normal reply */
#define T_DISABLE_FAILOVER (1<<9) /* don't perform dns failover */
+#define T_NO_E2E_CANCEL_REASON (1<<10) /* don't propagate CANCEL Reason */
#define T_DONT_FORK (T_CANCELED|T_6xx)
/* unsigned short should be enough for a retr. timer: max. 65535 ticks =>
diff --git a/modules/tm/t_lookup.c b/modules/tm/t_lookup.c
index 58e6fbc..01f6a82 100644
--- a/modules/tm/t_lookup.c
+++ b/modules/tm/t_lookup.c
@@ -1265,6 +1265,8 @@ static inline void init_new_t(struct cell *new_cell, struct sip_msg *p_msg)
(!cfg_get(tm, tm_cfg, tm_auto_inv_100) -1);
new_cell->flags|=T_DISABLE_6xx &
(!cfg_get(tm, tm_cfg, disable_6xx) -1);
+ new_cell->flags|=T_NO_E2E_CANCEL_REASON &
+ (!!cfg_get(tm, tm_cfg, e2e_cancel_reason) -1);
/* reset flags */
new_cell->flags &=
(~ get_msgid_val(user_cell_reset_flags, p_msg->id, int));
diff --git a/modules/tm/t_msgbuilder.c b/modules/tm/t_msgbuilder.c
index 4ccf3d2..a05fdbc 100644
--- a/modules/tm/t_msgbuilder.c
+++ b/modules/tm/t_msgbuilder.c
@@ -171,16 +171,18 @@ char *build_local(struct cell *Trans,unsigned int branch,
*len+=CONTENT_LENGTH_LEN+1 + CRLF_LEN;
reason_len = 0;
reas1 = 0;
- /* compute reason size */
+ /* compute reason size (if no reason or disabled => reason_len == 0)*/
if (reason && reason->cause != CANCEL_REAS_UNKNOWN){
- if (likely(reason->cause > 0)){
+ if (likely(reason->cause > 0 &&
+ cfg_get(tm, tm_cfg, local_cancel_reason))){
/* Reason: SIP;cause=<reason->cause>[;text=<reason->u.text.s>] */
reason_len = REASON_PREFIX_LEN + USHORT2SBUF_MAX_LEN +
(reason->u.text.s?
REASON_TEXT_LEN + 1 + reason->u.text.len + 1 : 0) +
CRLF_LEN;
} else if (reason->cause == CANCEL_REAS_RCVD_CANCEL &&
- reason->u.e2e_cancel) {
+ reason->u.e2e_cancel &&
+ !(Trans->flags & T_NO_E2E_CANCEL_REASON)) {
/* parse the entire cancel, to get all the Reason headers */
parse_headers(reason->u.e2e_cancel, HDR_EOH_F, 0);
for(hdr=get_hdr(reason->u.e2e_cancel, HDR_REASON_T), reas1=hdr;
@@ -189,7 +191,7 @@ char *build_local(struct cell *Trans,unsigned int branch,
reason_len += hdr->len;
reas_last=hdr;
}
- } else if (unlikely(reason->cause != -1))
+ } else if (unlikely(reason->cause < -1))
BUG("unhandled reason cause %d\n", reason->cause);
}
*len+= reason_len;
@@ -305,16 +307,18 @@ char *build_local_reparse(struct cell *Trans,unsigned int branch,
reason_len = 0;
reas1 = 0;
- /* compute reason size */
+ /* compute reason size (if no reason or disabled => reason_len == 0)*/
if (reason && reason->cause != CANCEL_REAS_UNKNOWN){
- if (likely(reason->cause > 0)){
+ if (likely(reason->cause > 0 &&
+ cfg_get(tm, tm_cfg, local_cancel_reason))){
/* Reason: SIP;cause=<reason->cause>[;text=<reason->u.text.s>] */
reason_len = REASON_PREFIX_LEN + USHORT2SBUF_MAX_LEN +
(reason->u.text.s?
REASON_TEXT_LEN + 1 + reason->u.text.len + 1 : 0) +
CRLF_LEN;
} else if (reason->cause == CANCEL_REAS_RCVD_CANCEL &&
- reason->u.e2e_cancel) {
+ reason->u.e2e_cancel &&
+ !(Trans->flags & T_NO_E2E_CANCEL_REASON)) {
/* parse the entire cancel, to get all the Reason headers */
parse_headers(reason->u.e2e_cancel, HDR_EOH_F, 0);
for(hdr=get_hdr(reason->u.e2e_cancel, HDR_REASON_T), reas1=hdr;
@@ -323,7 +327,7 @@ char *build_local_reparse(struct cell *Trans,unsigned int branch,
reason_len += hdr->len;
reas_last=hdr;
}
- } else if (unlikely(reason->cause != -1))
+ } else if (unlikely(reason->cause < -1))
BUG("unhandled reason cause %d\n", reason->cause);
}
@@ -431,6 +435,8 @@ char *build_local_reparse(struct cell *Trans,unsigned int branch,
/* end of SIP message found */
/* add reason if needed */
if (reason_len) {
+ /* if reason_len !=0, no need for any reason enabled
+ checks */
if (likely(reason->cause > 0)) {
append_str(d, REASON_PREFIX, REASON_PREFIX_LEN);
code_len=ushort2sbuf(reason->cause, d,
diff --git a/modules/tm/tm.c b/modules/tm/tm.c
index 2b35681..221be3b 100644
--- a/modules/tm/tm.c
+++ b/modules/tm/tm.c
@@ -87,16 +87,17 @@
* 2008-08-11 sctp support: t_relay_to_sctp, t_replicate_sctp,
* t_forward_nonack_sctp (andrei)
* 2009-03-18 added a new param: auto_inv_100_reason (aheise)
+ * 2010-03-03 added new params: local_cancel_reason and e2e_cancel_reason
+ * (andrei)
*/
-/*!
- * \file
- * \brief TM :: Module API (core)
- * \ingroup tm
+/** TM :: Module API (core).
+ * @file
+ * @ingroup tm
*/
-/*!
- * \defgroup tm TM :: Transaction stateful proxy support
+/**
+ * @defgroup tm TM :: Transaction stateful proxy support
*
The TM module enables stateful processing of SIP transactions. The main use
of stateful logic, which is costly in terms of memory and CPU, is some
@@ -283,6 +284,8 @@ static int w_t_reset_max_lifetime(struct sip_msg* msg, char* foo, char* bar);
static int t_set_auto_inv_100(struct sip_msg* msg, char* on_off, char* foo);
static int t_set_disable_6xx(struct sip_msg* msg, char* on_off, char* foo);
static int t_set_disable_failover(struct sip_msg* msg, char* on_off, char* f);
+static int t_set_no_e2e_cancel_reason(struct sip_msg* msg, char* on_off,
+ char* f);
static int t_branch_timeout(struct sip_msg* msg, char*, char*);
static int t_branch_replied(struct sip_msg* msg, char*, char*);
static int t_any_timeout(struct sip_msg* msg, char*, char*);
@@ -428,6 +431,13 @@ static cmd_export_t cmds[]={
REQUEST_ROUTE|TM_ONREPLY_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE },
{"t_set_disable_failover", t_set_disable_failover, 1, fixup_var_int_1,
REQUEST_ROUTE|TM_ONREPLY_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE },
+ {"t_set_no_e2e_cancel_reason", t_set_no_e2e_cancel_reason, 1,
+ fixup_var_int_1,
+ REQUEST_ROUTE|TM_ONREPLY_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE },
+ /* alias for t_set_no_e2e_cancel_reason */
+ {"t_disable_e2e_cancel_reason", t_set_no_e2e_cancel_reason, 1,
+ fixup_var_int_1,
+ REQUEST_ROUTE|TM_ONREPLY_ROUTE|FAILURE_ROUTE|BRANCH_ROUTE },
{"t_branch_timeout", t_branch_timeout, 0, 0, FAILURE_ROUTE},
{"t_branch_replied", t_branch_replied, 0, 0, FAILURE_ROUTE},
{"t_any_timeout", t_any_timeout, 0, 0,
@@ -535,6 +545,8 @@ static param_export_t params[]={
{"contacts_avp", PARAM_STRING, &contacts_avp_param },
{"disable_6xx_block", PARAM_INT, &default_tm_cfg.disable_6xx },
{"local_ack_mode", PARAM_INT, &default_tm_cfg.local_ack_mode },
+ {"local_cancel_reason", PARAM_INT, &default_tm_cfg.local_cancel_reason },
+ {"e2e_cancel_reason", PARAM_INT, &default_tm_cfg.e2e_cancel_reason },
{0,0,0}
};
@@ -1736,6 +1748,9 @@ T_SET_FLAG_GEN_FUNC(t_set_disable_6xx, T_DISABLE_6xx)
T_SET_FLAG_GEN_FUNC(t_set_disable_failover, T_DISABLE_FAILOVER)
+/* disable/enable e2e cancel reason copy for the current transaction */
+T_SET_FLAG_GEN_FUNC(t_set_no_e2e_cancel_reason, T_NO_E2E_CANCEL_REASON)
+
/* script function, FAILURE_ROUTE only, returns true if the
* choosed "failure" branch failed because of a timeout,
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