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tm.c
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tm.c
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/*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of opensips, a free SIP server.
*
* opensips is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* opensips is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* History:
* --------
* 2003-02-18 added t_forward_nonack_{udp, tcp}, t_relay_to_{udp,tcp},
* t_replicate_{udp, tcp} (andrei)
* 2003-02-19 added t_rely_{udp, tcp} (andrei)
* 2003-03-06 voicemail changes accepted (jiri)
* 2003-03-10 module export interface updated to the new format (andrei)
* 2003-03-16 flags export parameter added (janakj)
* 2003-03-19 replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)
* 2003-03-30 set_kr for requests only (jiri)
* 2003-04-05 s/reply_route/failure_route, onreply_route introduced (jiri)
* 2003-04-14 use protocol from uri (jiri)
* 2003-07-07 added t_relay_to_tls, t_replicate_tls, t_forward_nonack_tls
* removed t_relay_{udp,tcp,tls} (andrei)
* 2003-09-26 added t_forward_nonack_uri() - same as t_forward_nonack() but
* takes no parameters -> forwards to uri (bogdan)
* 2004-02-11 FIFO/CANCEL + alignments (hash=f(callid,cseq)) (uli+jiri)
* 2004-02-18 t_reply exported via FIFO - imported from VM (bogdan)
* 2004-10-01 added a new param.: restart_fr_on_each_reply (andrei)
* 2005-05-30 light version of tm_load - find_export dropped -> module
* interface dosen't need to export internal functions (bogdan)
* 2006-01-15 merged functions which diff only via proto (like t_relay,
* t_replicate and t_forward_nonack) (bogdan)
* 2007-01-25 t_forward_nonack removed as it merged into t_relay,
* t_replicate also accepts flags for controlling DNS failover
* (bogdan)
* 2008-04-04 added support for local and remote dispaly name in TM dialogs
* (by Andrei Pisau <andrei.pisau at voice-system dot ro> )
*/
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include "../../sr_module.h"
#include "../../dprint.h"
#include "../../error.h"
#include "../../ut.h"
#include "../../script_cb.h"
#include "../../mi/mi.h"
#include "../../usr_avp.h"
#include "../../mem/mem.h"
#include "../../pvar.h"
#include "sip_msg.h"
#include "h_table.h"
#include "ut.h"
#include "t_reply.h"
#include "t_fwd.h"
#include "t_lookup.h"
#include "callid.h"
#include "t_cancel.h"
#include "t_fifo.h"
#include "mi.h"
#include "tm_load.h"
#include "t_ctx.h"
#include "async.h"
#include "cluster.h"
/* item functions */
static int pv_get_tm_branch_idx(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res);
static int pv_get_tm_reply_code(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res);
static int pv_get_tm_ruri(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res);
static int pv_get_t_id(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res);
/* fixup functions */
static int fixup_local_replied(void** param);
static int fixup_cancel_branch(void** param);
static int fixup_froute(void** param);
static int fixup_rroute(void** param);
static int fixup_broute(void** param);
static int fixup_inject_source(void **param);
static int fixup_inject_flags(void **param);
static int fixup_reply_code(void **param);
static int flag_fixup(void** param);
static int fixup_phostport2proxy(void** param);
static int fixup_free_proxy(void **param);
/* init functions */
static int mod_init(void);
static int child_init(int rank);
/* exported functions */
static int w_t_newtran(struct sip_msg* p_msg);
static int w_t_reply(struct sip_msg* msg, unsigned int code, str* text);
static int w_pv_t_reply(struct sip_msg *msg, unsigned int* code, str* text);
static int w_t_relay( struct sip_msg *p_msg , void *flags, struct proxy_l *proxy);
static int w_t_replicate(struct sip_msg *p_msg, str *dst, void *flags);
static int w_t_on_negative(struct sip_msg* msg, void *go_to);
static int w_t_on_reply(struct sip_msg* msg, void *go_to);
static int w_t_on_branch(struct sip_msg* msg, void *go_to);
static int t_check_status(struct sip_msg* msg, regex_t *regexp);
static int t_flush_flags(struct sip_msg* msg);
static int t_local_replied(struct sip_msg* msg, void *type);
static int t_check_trans(struct sip_msg* msg);
static int t_was_cancelled(struct sip_msg* msg);
static int w_t_cancel_branch(struct sip_msg* msg, void *sflags);
static int w_t_add_hdrs(struct sip_msg* msg, str *val);
static int t_cancel_trans(struct cell *t, str *hdrs);
static int w_t_new_request(struct sip_msg* msg, str *method,
str *ruri, str *from, str *to, str *body, str *p_ctx);
static int w_t_inject_branches(struct sip_msg* msg, void *source, void *extra_flags);
static int w_t_wait_for_new_branches(struct sip_msg* msg);
struct sip_msg* tm_pv_context_request(struct sip_msg* msg);
struct sip_msg* tm_pv_context_reply(struct sip_msg* msg);
/* these values are used when the transaction has not been defined yet */
int fr_timeout;
int fr_inv_timeout;
#define TM_CANCEL_BRANCH_ALL (1<<0)
#define TM_CANCEL_BRANCH_OTHERS (1<<1)
#define PV_FIELD_DELIM ", "
#define PV_FIELD_DELIM_LEN (sizeof(PV_FIELD_DELIM) - 1)
#define PV_LOCAL_BUF_SIZE 511
static char pv_local_buf[PV_LOCAL_BUF_SIZE+1];
static str uac_ctx_avp = str_init("uac_ctx");
static int uac_ctx_avp_id;
int pv_get_tm_branch_avp(struct sip_msg*, pv_param_t*, pv_value_t*);
int pv_set_tm_branch_avp(struct sip_msg*, pv_param_t*, int, pv_value_t*);
int pv_get_tm_fr_timeout(struct sip_msg*, pv_param_t *, pv_value_t*);
int pv_set_tm_fr_timeout(struct sip_msg*, pv_param_t *, int, pv_value_t*);
int pv_get_tm_fr_inv_timeout(struct sip_msg*, pv_param_t *, pv_value_t*);
int pv_set_tm_fr_inv_timeout(struct sip_msg*, pv_param_t *, int, pv_value_t*);
struct usr_avp** get_bavp_list(void);
/* module parameteres */
int tm_enable_stats = 1;
static int timer_partitions = 1;
/* statistic variables */
stat_var *tm_rcv_rpls;
stat_var *tm_rld_rpls;
stat_var *tm_loc_rpls;
stat_var *tm_uas_trans;
stat_var *tm_uac_trans;
stat_var *tm_trans_2xx;
stat_var *tm_trans_3xx;
stat_var *tm_trans_4xx;
stat_var *tm_trans_5xx;
stat_var *tm_trans_6xx;
stat_var *tm_trans_inuse;
static dep_export_t deps = {
{ /* OpenSIPS module dependencies */
{ MOD_TYPE_NULL, NULL, 0 },
},
{ /* modparam dependencies */
{ "tm_replication_cluster", get_deps_clusterer },
{ NULL, NULL },
},
};
static cmd_export_t cmds[]={
{"t_newtran", (cmd_function)w_t_newtran, {{0,0,0}},
REQUEST_ROUTE},
{"t_reply", (cmd_function)w_pv_t_reply, {
{CMD_PARAM_INT, fixup_reply_code, 0},
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE},
{"t_replicate", (cmd_function)w_t_replicate, {
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_INT | CMD_PARAM_OPT, flag_fixup, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE},
{"t_relay", (cmd_function)w_t_relay, {
{CMD_PARAM_INT|CMD_PARAM_OPT, flag_fixup, 0},
{CMD_PARAM_STR|CMD_PARAM_OPT, fixup_phostport2proxy,fixup_free_proxy},
{0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE},
{"t_on_failure", (cmd_function)w_t_on_negative, {
{CMD_PARAM_STR, fixup_froute, 0}, {0,0,0}},
REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE},
{"t_on_reply", (cmd_function)w_t_on_reply, {
{CMD_PARAM_STR, fixup_rroute, 0}, {0,0,0}},
REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE},
{"t_on_branch", (cmd_function)w_t_on_branch, {
{CMD_PARAM_STR, fixup_broute, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE | ONREPLY_ROUTE | BRANCH_ROUTE},
{"t_check_status", (cmd_function)t_check_status, {
{CMD_PARAM_REGEX, 0, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE | ONREPLY_ROUTE | BRANCH_ROUTE},
{"t_write_req", (cmd_function)t_write_req, {
{CMD_PARAM_STR, fixup_t_write, fixup_free_t_write},
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE | BRANCH_ROUTE},
{"t_write_unix", (cmd_function)t_write_unix, {
{CMD_PARAM_STR, fixup_t_write, fixup_free_t_write},
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE | BRANCH_ROUTE},
{"t_flush_flags", (cmd_function)t_flush_flags, {{0,0,0}},
REQUEST_ROUTE | BRANCH_ROUTE},
{"t_local_replied", (cmd_function)t_local_replied, {
{CMD_PARAM_STR, fixup_local_replied, 0}, {0,0,0}},
REQUEST_ROUTE | FAILURE_ROUTE | ONREPLY_ROUTE | BRANCH_ROUTE},
{"t_check_trans", (cmd_function)t_check_trans, {{0,0,0}},
REQUEST_ROUTE | BRANCH_ROUTE},
{"t_was_cancelled", (cmd_function)t_was_cancelled, {{0,0,0}},
FAILURE_ROUTE | ONREPLY_ROUTE},
{"t_cancel_branch", (cmd_function)w_t_cancel_branch, {
{CMD_PARAM_STR | CMD_PARAM_OPT, fixup_cancel_branch, 0}, {0,0,0}},
ONREPLY_ROUTE},
{"t_add_hdrs", (cmd_function)w_t_add_hdrs, {
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE},
{"t_reply_with_body", (cmd_function)w_t_reply_body, {
{CMD_PARAM_INT, fixup_reply_code, 0},
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE},
{"t_new_request", (cmd_function)w_t_new_request, {
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_STR, 0, 0},
{CMD_PARAM_STR | CMD_PARAM_OPT, 0, 0},
{CMD_PARAM_STR | CMD_PARAM_OPT, 0, 0}, {0,0,0}},
REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE},
{"t_add_cancel_reason", (cmd_function)t_add_reason, {
{CMD_PARAM_STR, 0, 0}, {0,0,0}},
REQUEST_ROUTE},
{"t_inject_branches", (cmd_function)w_t_inject_branches, {
{CMD_PARAM_STR, fixup_inject_source, 0},
{CMD_PARAM_STR | CMD_PARAM_OPT, fixup_inject_flags, 0}, {0,0,0}},
REQUEST_ROUTE|ONREPLY_ROUTE},
{"t_wait_for_new_branches", (cmd_function)w_t_wait_for_new_branches,
{{0,0,0}},REQUEST_ROUTE},
{"t_anycast_replicate", (cmd_function)tm_anycast_replicate, {{0,0,0}},
REQUEST_ROUTE},
{"load_tm", (cmd_function)load_tm, {{0,0,0}}, 0},
{0,0,{{0,0,0}},0}
};
static param_export_t params[]={
{"ruri_matching", INT_PARAM,
&ruri_matching},
{"via1_matching", INT_PARAM,
&via1_matching},
{"fr_timeout", INT_PARAM,
&(timer_id2timeout[FR_TIMER_LIST])},
{"fr_inv_timeout", INT_PARAM,
&(timer_id2timeout[FR_INV_TIMER_LIST])},
{"wt_timer", INT_PARAM,
&(timer_id2timeout[WT_TIMER_LIST])},
{"delete_timer", INT_PARAM,
&(timer_id2timeout[DELETE_LIST])},
{"T1_timer", INT_PARAM,
&(timer_id2timeout[RT_T1_TO_1])},
{"T2_timer", INT_PARAM,
&(timer_id2timeout[RT_T2])},
{"unix_tx_timeout", INT_PARAM,
&tm_unix_tx_timeout},
{"restart_fr_on_each_reply", INT_PARAM,
&restart_fr_on_each_reply},
{"tw_append", STR_PARAM|USE_FUNC_PARAM,
(void*)parse_tw_append },
{ "enable_stats", INT_PARAM,
&tm_enable_stats },
{ "pass_provisional_replies", INT_PARAM,
&pass_provisional_replies },
{ "syn_branch", INT_PARAM,
&syn_branch },
{ "onreply_avp_mode", INT_PARAM,
&onreply_avp_mode },
{ "disable_6xx_block", INT_PARAM,
&disable_6xx_block },
{ "minor_branch_flag", STR_PARAM,
&minor_branch_flag_str },
{ "minor_branch_flag", INT_PARAM,
&minor_branch_flag },
{ "timer_partitions", INT_PARAM,
&timer_partitions },
{ "auto_100trying", INT_PARAM,
&auto_100trying },
{ "tm_replication_cluster", INT_PARAM,
&tm_repl_cluster },
{ "cluster_param", STR_PARAM,
&tm_cluster_param.s },
{ "cluster_auto_cancel", INT_PARAM,
&tm_repl_auto_cancel },
{0,0,0}
};
static stat_export_t mod_stats[] = {
{"received_replies" , 0, &tm_rcv_rpls },
{"relayed_replies" , 0, &tm_rld_rpls },
{"local_replies" , 0, &tm_loc_rpls },
{"UAS_transactions" , 0, &tm_uas_trans },
{"UAC_transactions" , 0, &tm_uac_trans },
{"2xx_transactions" , 0, &tm_trans_2xx },
{"3xx_transactions" , 0, &tm_trans_3xx },
{"4xx_transactions" , 0, &tm_trans_4xx },
{"5xx_transactions" , 0, &tm_trans_5xx },
{"6xx_transactions" , 0, &tm_trans_6xx },
{"inuse_transactions" , STAT_NO_RESET, &tm_trans_inuse },
{0,0,0}
};
/**
* pseudo-variables exported by TM module
*/
static pv_export_t mod_items[] = {
{ {"T_branch_idx", sizeof("T_branch_idx")-1}, 900,
pv_get_tm_branch_idx, NULL, NULL, NULL, NULL, 0 },
{ {"T_reply_code", sizeof("T_reply_code")-1}, 901,
pv_get_tm_reply_code, NULL, NULL, NULL, NULL, 0 },
{ {"T_ruri", sizeof("T_ruri")-1}, 902,
pv_get_tm_ruri, NULL, NULL, NULL, NULL, 0 },
{ {"bavp", sizeof("bavp")-1}, 903,
pv_get_tm_branch_avp, pv_set_tm_branch_avp,
pv_parse_avp_name, pv_parse_index, NULL, 0 },
{ {"T_fr_timeout", sizeof("T_fr_timeout")-1}, 904,
pv_get_tm_fr_timeout, pv_set_tm_fr_timeout,
NULL, NULL, NULL, 0 },
{ {"T_fr_inv_timeout", sizeof("T_fr_inv_timeout")-1}, 905,
pv_get_tm_fr_inv_timeout, pv_set_tm_fr_inv_timeout,
NULL, NULL, NULL, 0 },
{ {"T_id", sizeof("T_id")-1}, 906,
pv_get_t_id, NULL, NULL, NULL, NULL, 0 },
{ {0, 0}, 0, 0, 0, 0, 0, 0, 0 }
};
static mi_export_t mi_cmds [] = {
{ MI_TM_UAC, 0, MI_ASYNC_RPL_FLAG|MI_NAMED_PARAMS_ONLY, 0, {
{mi_tm_uac_dlg_1, {"method", "ruri", "headers", 0}},
{mi_tm_uac_dlg_2, {"method", "ruri", "headers", "next_hop", 0}},
{mi_tm_uac_dlg_3, {"method", "ruri", "headers", "socket", 0}},
{mi_tm_uac_dlg_4, {"method", "ruri", "headers", "body", 0}},
{mi_tm_uac_dlg_5, {"method", "ruri", "headers", "next_hop", "socket", 0}},
{mi_tm_uac_dlg_6, {"method", "ruri", "headers", "next_hop", "body", 0}},
{mi_tm_uac_dlg_7, {"method", "ruri", "headers", "socket", "body", 0}},
{mi_tm_uac_dlg_8, {"method", "ruri", "headers", "next_hop", "socket",
"body", 0}},
{EMPTY_MI_RECIPE}}
},
{ MI_TM_CANCEL, 0, 0, 0, {
{mi_tm_cancel, {"callid", "cseq", 0}},
{EMPTY_MI_RECIPE}}
},
{ MI_TM_HASH, 0, 0, 0, {
{mi_tm_hash, {0}},
{EMPTY_MI_RECIPE}}
},
{ MI_TM_REPLY, 0, MI_NAMED_PARAMS_ONLY, 0, {
{mi_tm_reply_1, {"code", "reason", "trans_id", "to_tag", 0}},
{mi_tm_reply_2, {"code", "reason", "trans_id", "to_tag",
"new_headers", 0}},
{mi_tm_reply_3, {"code", "reason", "trans_id", "to_tag",
"body", 0}},
{mi_tm_reply_4, {"code", "reason", "trans_id", "to_tag",
"new_headers", "body", 0}},
{EMPTY_MI_RECIPE}}
},
{EMPTY_MI_EXPORT}
};
#ifdef STATIC_TM
struct module_exports tm_exports = {
#else
struct module_exports exports= {
#endif
"tm", /* module name*/
MOD_TYPE_DEFAULT,/* class of this module */
MODULE_VERSION,
DEFAULT_DLFLAGS, /* dlopen flags */
0, /* load function */
&deps, /* OpenSIPS module dependencies */
cmds, /* exported functions */
NULL, /* exported async functions */
params, /* exported variables */
mod_stats, /* exported statistics */
mi_cmds, /* exported MI functions */
mod_items, /* exported pseudo-variables */
0, /* exported transformations */
0, /* extra processes */
0, /* module pre-initialization function */
mod_init, /* module initialization function */
(response_function) reply_received,
(destroy_function) tm_shutdown,
child_init,/* per-child init function */
0 /* reload confirm function */
};
/**************************** fixup functions ******************************/
static int fixup_froute(void** param)
{
int rt;
str rt_name_nt;
if (pkg_nt_str_dup(&rt_name_nt, (str*)*param) < 0) {
LM_ERR("No more pkg memory\n");
return -1;
}
rt = get_script_route_ID_by_name( rt_name_nt.s,
sroutes->failure, FAILURE_RT_NO);
if (rt==-1) {
LM_ERR("failure route <%s> does not exist\n",rt_name_nt.s);
pkg_free(rt_name_nt.s);
return -1;
}
*param = (void*)(unsigned long int)rt;
pkg_free(rt_name_nt.s);
return 0;
}
static int fixup_rroute(void** param)
{
int rt;
str rt_name_nt;
if (pkg_nt_str_dup(&rt_name_nt, (str*)*param) < 0) {
LM_ERR("No more pkg memory\n");
return -1;
}
rt = get_script_route_ID_by_name(rt_name_nt.s,
sroutes->onreply, ONREPLY_RT_NO);
if (rt==-1) {
LM_ERR("onreply route <%s> does not exist\n",rt_name_nt.s);
pkg_free(rt_name_nt.s);
return -1;
}
*param = (void*)(unsigned long int)rt;
pkg_free(rt_name_nt.s);
return 0;
}
static int fixup_broute(void** param)
{
int rt;
str rt_name_nt;
if (pkg_nt_str_dup(&rt_name_nt, (str*)*param) < 0) {
LM_ERR("No more pkg memory\n");
return -1;
}
rt = get_script_route_ID_by_name(rt_name_nt.s,
sroutes->branch, BRANCH_RT_NO);
if (rt==-1) {
LM_ERR("branch route <%s> does not exist\n",rt_name_nt.s);
pkg_free(rt_name_nt.s);
return -1;
}
*param = (void*)(unsigned long int)rt;
pkg_free(rt_name_nt.s);
return 0;
}
static int flag_fixup(void** param)
{
*param = (void*)(unsigned long int)((*(unsigned int*)*param)<<1);
return 0;
}
static int fixup_phostport2proxy(void** param)
{
struct proxy_l *proxy;
str s = *(str*)*param;
int port;
int proto;
str host;
if (s.s == NULL || s.len == 0) {
LM_CRIT("empty parameter\n");
return E_UNSPEC;
}
if (parse_phostport(s.s, s.len, &host.s, &host.len, &port, &proto)!=0){
LM_CRIT("invalid parameter <%.*s>\n",s.len, s.s);
return E_UNSPEC;
}
proxy = mk_proxy( &host, port, proto, 0);
if (proxy==0) {
LM_ERR("failed to resolve <%.*s>\n", host.len, host.s );
return ser_error;
}
*(param)=proxy;
return 0;
}
static int fixup_free_proxy(void **param)
{
free_proxy(*param);
return 0;
}
static int fixup_reply_code(void **param)
{
if (*(int*)*param < 100 || *(int*)*param > 699) {
LM_ERR("wrong value [%d] for param! - Allowed only"
" 1xx - 6xx \n", *(int*)*param);
return E_CFG;
}
return 0;
}
static int fixup_local_replied(void** param)
{
int n = 0;
str *s = (str*)*param;
if (strncasecmp(s->s,"all",3)==0) {
n = 0;
} else if (strncasecmp(s->s,"branch",6)==0) {
n = 1;
} else if (strncasecmp(s->s,"last",4)==0) {
n = 2;
} else {
LM_ERR("invalid param \"%.*s\"\n", s->len, s->s);
return E_CFG;
}
*param=(void*)(long)n;
return 0;
}
static int fixup_cancel_branch(void** param)
{
unsigned int flags = 0;
str *s = (str*)*param;
int i;
for (i=0; i < s->len; i++)
switch (s->s[i]) {
case 'a':
case 'A':
flags |= TM_CANCEL_BRANCH_ALL;
break;
case 'o':
case 'O':
flags |= TM_CANCEL_BRANCH_OTHERS;
break;
default:
LM_ERR("unsupported flag '%c'\n",s->s[i]);
return -1;
}
*param = (void*)(unsigned long)flags;
return 0;
}
static int fixup_inject_source(void **param)
{
unsigned int flags = 0;
str *s = (str *)*param;
if ( strncasecmp(s->s, "msg", 3)==0 || strncasecmp(s->s, "message", 7)==0 ) {
flags |= TM_INJECT_SRC_MSG;
} else
if ( strncasecmp(s->s, "event", 5)==0 || strncasecmp(s->s, "events", 6)==0 ) {
flags |= TM_INJECT_SRC_EVENT;
} else {
LM_ERR("unsupported injection source '%.*s'\n", s->len, s->s);
return -1;
}
*param = (void*)(unsigned long)flags;
return 0;
}
static int fixup_inject_flags(void **param)
{
unsigned int flags = 0;
str *s = (str *)*param;
if ( strncasecmp(s->s, "cancel", 6)==0 ) {
flags |= TM_INJECT_FLAG_CANCEL;
} else {
LM_ERR("unsupported injection flag '%.*s'\n", s->len, s->s);
return -1;
}
*param = (void*)(unsigned long)flags;
return 0;
}
/***************************** init functions *****************************/
int load_tm( struct tm_binds *tmb)
{
tmb->register_tmcb = register_tmcb;
/* relay function */
tmb->t_relay = (cmd_function)w_t_relay;
/* reply functions */
tmb->t_reply = (treply_f)w_t_reply;
tmb->t_reply_with_body = t_reply_with_body;
tmb->t_gen_totag = t_gen_totag;
/* transaction location/status functions */
tmb->t_newtran = w_t_newtran;
tmb->t_is_local = t_is_local;
tmb->t_check_trans = (cmd_function)t_check_trans;
tmb->t_get_trans_ident = t_get_trans_ident;
tmb->t_lookup_ident = t_lookup_ident;
tmb->t_gett = get_t;
tmb->t_get_e2eackt = get_e2eack_t;
tmb->t_get_picked = t_get_picked_branch;
tmb->t_set_remote_t = t_set_remote_t;
tmb->t_lookup_original_t = t_lookupOriginalT;
tmb->unref_cell = t_unref_cell;
tmb->ref_cell = t_ref_cell;
tmb->t_setkr = set_kr;
tmb->t_cancel_trans = t_cancel_trans;
/* tm uac functions */
tmb->t_addblind = add_blind_uac;
tmb->t_request_within = req_within;
tmb->t_request_outside = req_outside;
tmb->t_request = request;
tmb->new_dlg_uac = new_dlg_uac;
tmb->new_auto_dlg_uac = new_auto_dlg_uac;
tmb->dlg_add_extra = dlg_add_extra;
tmb->dlg_response_uac = dlg_response_uac;
tmb->new_dlg_uas = new_dlg_uas;
tmb->dlg_request_uas = dlg_request_uas;
tmb->free_dlg = free_dlg;
tmb->print_dlg = print_dlg;
tmb->setlocalTholder = setlocalTholder;
tmb->get_branch_index = get_branch_index;
/* tm context functions */
tmb->t_ctx_register_int = t_ctx_register_int;
tmb->t_ctx_register_str = t_ctx_register_str;
tmb->t_ctx_register_ptr = t_ctx_register_ptr;
tmb->t_ctx_put_int = t_ctx_put_int;
tmb->t_ctx_put_str = t_ctx_put_str;
tmb->t_ctx_put_ptr = t_ctx_put_ptr;
tmb->t_ctx_get_int = t_ctx_get_int;
tmb->t_ctx_get_str = t_ctx_get_str;
tmb->t_ctx_get_ptr = t_ctx_get_ptr;
return 1;
}
static int do_t_cleanup( struct sip_msg *req, void *bar)
{
struct cell *t;
empty_tmcb_list(&tmcb_pending_hl);
t = get_cancelled_t();
if (t!=NULL && t!=T_UNDEFINED)
t_unref_cell(t);
t = get_e2eack_t();
if (t!=NULL && t!=T_UNDEFINED)
t_unref_cell(t);
reset_e2eack_t();
if ( (t=get_t())!=NULL && t!=T_UNDEFINED && /* we have a transaction */
t->uas.request && req->REQ_METHOD==t->uas.request->REQ_METHOD) {
/* check the UAS request not yet updated from script msg */
LOCK_REPLIES(t);
if (t->uas.request->msg_flags & FL_SHM_UPDATED)
LM_DBG("transaction %p already updated! Skipping update!\n", t);
else
update_cloned_msg_from_msg( t->uas.request, req);
UNLOCK_REPLIES(t);
}
return t_unref(req) == 0 ? SCB_DROP_MSG : SCB_RUN_ALL;
}
static int script_init( struct sip_msg *msg, void *bar)
{
/* we primarily reset all private memory here to make sure
* private values left over from previous message will
* not be used again */
set_t(T_UNDEFINED);
reset_cancelled_t();
reset_e2eack_t();
fr_timeout = timer_id2timeout[FR_TIMER_LIST];
fr_inv_timeout = timer_id2timeout[FR_INV_TIMER_LIST];
/* reset the kill reason status */
reset_kr();
/* reset the static holders for T routes */
t_on_negative( 0 );
t_on_reply(0);
t_on_branch(0);
if (msg->REQ_METHOD == METHOD_CANCEL && is_anycast(msg->rcv.bind_address) &&
tm_anycast_cancel(msg) == 0)
return SCB_DROP_MSG;
return SCB_RUN_ALL;
}
static int mod_init(void)
{
unsigned int timer_sets,set;
unsigned int roundto_init;
LM_INFO("TM - initializing...\n");
/* checking if we have sufficient bitmap capacity for given
maximum number of branches */
if (MAX_BRANCHES+1>31) {
LM_CRIT("Too many max UACs for UAC branch_bm_t bitmap: %d\n",
MAX_BRANCHES );
return -1;
}
fix_flag_name(minor_branch_flag_str, minor_branch_flag);
minor_branch_flag =
get_flag_id_by_name(FLAG_TYPE_BRANCH, minor_branch_flag_str);
if (minor_branch_flag!=-1) {
if (minor_branch_flag > (8*sizeof(int)-1)) {
LM_CRIT("invalid minor branch flag\n");
return -1;
}
minor_branch_flag = 1<<minor_branch_flag;
} else {
minor_branch_flag = 0;
}
/* if statistics are disabled, prevent their registration to core */
if (tm_enable_stats==0)
#ifdef STATIC_TM
tm_exports.stats = 0;
#else
exports.stats = 0;
#endif
if (init_callid() < 0) {
LM_CRIT("Error while initializing Call-ID generator\n");
return -1;
}
/* how many timer sets do we need to create? */
timer_sets = (timer_partitions<=1)?1:timer_partitions ;
/* try first allocating all the structures needed for syncing */
if (lock_initialize( timer_sets )==-1)
return -1;
/* building the hash table*/
if (!init_hash_table( timer_sets )) {
LM_ERR("initializing hash_table failed\n");
return -1;
}
/* init static hidden values */
init_t();
if (!tm_init_timers( timer_sets ) ) {
LM_ERR("timer init failed\n");
return -1;
}
/* the ROUNDTO macro taken from the locking interface */
#ifdef ROUNDTO
roundto_init = ROUNDTO;
#else
roundto_init = sizeof(void *);
#endif
while (roundto_init != 1) {
tm_timer_shift++;
roundto_init >>= 1;
}
LM_DBG("timer set shift is %d\n", tm_timer_shift);
/* register the timer functions */
for ( set=0 ; set<timer_sets ; set++ ) {
if (register_timer( "tm-timer", timer_routine,
(void*)(long)set, 1, TIMER_FLAG_DELAY_ON_DELAY) < 0 ) {
LM_ERR("failed to register timer for set %d\n",set);
return -1;
}
if (register_utimer( "tm-utimer", utimer_routine,
(void*)(long)set, 100*1000, TIMER_FLAG_DELAY_ON_DELAY)<0) {
LM_ERR("failed to register utimer for set %d\n",set);
return -1;
}
}
if (uac_init()==-1) {
LM_ERR("uac_init failed\n");
return -1;
}
if (init_tmcb_lists()!=1) {
LM_CRIT("failed to init tmcb lists\n");
return -1;
}
tm_init_tags();
init_twrite_lines();
if (init_twrite_sock() < 0) {
LM_ERR("failed to create socket\n");
return -1;
}
/* register post-script clean-up function */
if (register_script_cb( do_t_cleanup, POST_SCRIPT_CB|REQ_TYPE_CB, 0)<0 ) {
LM_ERR("failed to register POST request callback\n");
return -1;
}
if (register_script_cb( script_init, PRE_SCRIPT_CB|REQ_TYPE_CB , 0)<0 ) {
LM_ERR("failed to register PRE request callback\n");
return -1;
}
if(register_pv_context("request", tm_pv_context_request)< 0) {
LM_ERR("Failed to register pv contexts\n");
return -1;
}
if(register_pv_context("reply", tm_pv_context_reply)< 0) {
LM_ERR("Failed to register pv contexts\n");
return -1;
}
if ( parse_avp_spec( &uac_ctx_avp, &uac_ctx_avp_id)<0 ) {
LM_ERR("failed to register AVP name <%s>\n",uac_ctx_avp.s);
return -1;
}
if ( register_async_script_handlers( t_handle_async, t_resume_async )<0 ) {
LM_ERR("failed to register async handler to core \n");
return -1;
}
if (tm_init_cluster() < 0) {
LM_ERR("cannot initialize cluster support for transactions!\n");
LM_WARN("running without cluster support for transactions!\n");
}
return 0;
}
static int child_init(int rank)
{
if (child_init_callid(rank) < 0) {
LM_ERR("failed to initialize Call-ID generator\n");
return -2;
}
return 0;
}
/**************************** wrapper functions ***************************/
static int t_check_status(struct sip_msg* msg, regex_t *regexp)
{
regmatch_t pmatch;
struct cell *t;
char *status;
char backup;
int branch;
int n;
/* first get the transaction */
t = get_t();
if ( t==0 || t==T_UNDEFINED ) {
LM_ERR("cannot check status for a reply which"
" has no transaction-state established\n");
return -1;
}
backup = 0;
switch (route_type) {
case REQUEST_ROUTE:
/* use the status of the last sent reply */
status = int2str( t->uas.status, 0);
break;
case ONREPLY_ROUTE:
/* use the status of the current reply */
status = msg->first_line.u.reply.status.s;
backup = status[msg->first_line.u.reply.status.len];
status[msg->first_line.u.reply.status.len] = 0;
break;
case FAILURE_ROUTE:
/* use the status of the winning reply */
if ( (branch=t_get_picked_branch())<0 ) {
LM_CRIT("no picked branch (%d) for a final response"
" in MODE_ONFAILURE\n", branch);
return -1;
}
status = int2str( t->uac[branch].last_received , 0);
break;
default:
LM_ERR("unsupported route_type %d\n", route_type);
return -1;
}
LM_DBG("checked status is <%s>\n",status);
/* do the checking */
n = regexec(regexp, status, 1, &pmatch, 0);
if (backup) status[msg->first_line.u.reply.status.len] = backup;
if (n!=0) return -1;
return 1;
}
static int t_check_trans(struct sip_msg* msg)
{
struct cell *trans;
if (msg->REQ_METHOD==METHOD_CANCEL) {
/* parse needed hdrs*/
if (check_transaction_quadruple(msg)==0) {
LM_ERR("too few headers\n");
return 0; /*drop request!*/
}
if (!msg->hash_index)
msg->hash_index = tm_hash(msg->callid->body,get_cseq(msg)->number);
/* performe lookup */
trans = t_lookupOriginalT( msg );
return trans?1:-1;
} else {
trans = get_t();
if (trans==NULL)
return -1;
if (trans!=T_UNDEFINED)
return 1;
switch ( t_lookup_request( msg , 0) ) {
case 1:
/* transaction found -> is it local ACK? */
if (msg->REQ_METHOD==METHOD_ACK)
return 1;
/* .... else -> retransmission */
trans = get_t();
t_retransmit_reply(trans);
UNREF(trans);
set_t(0);
return 0;
case -2:
/* e2e ACK found */