/
dlg_handlers.c
1957 lines (1672 loc) · 64.5 KB
/
dlg_handlers.c
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/*!
* \file
* \brief Functions related to dialog handling
* \ingroup dialog
* Module: \ref dialog
*/
#include <string.h>
#include <time.h>
#include "../../core/trim.h"
#include "../../core/pvar.h"
#include "../../core/timer.h"
#include "../../core/counters.h"
#include "../../core/action.h"
#include "../../core/script_cb.h"
#include "../../core/fmsg.h"
#include "../../core/parser/parse_from.h"
#include "../../core/parser/parse_cseq.h"
#include "../../core/parser/contact/parse_contact.h"
#include "../../core/parser/parse_from.h"
#include "../../core/parser/parse_rr.h"
#include "../../modules/tm/tm_load.h"
#include "../../modules/rr/api.h"
#include "dlg_hash.h"
#include "dlg_timer.h"
#include "dlg_cb.h"
#include "dlg_handlers.h"
#include "dlg_req_within.h"
#include "dlg_profile.h"
#include "dlg_var.h"
#include "dlg_db_handler.h"
#include "dlg_ng_stats.h"
static str rr_param; /*!< record-route parameter for matching */
static int dlg_flag; /*!< flag for dialog tracking */
static pv_spec_t *timeout_avp; /*!< AVP for timeout setting */
static int default_timeout; /*!< default dialog timeout */
static int seq_match_mode; /*!< dlg_match mode */
static int shutdown_done = 0; /*!< 1 when destroy_dlg_handlers was called */
extern int detect_spirals;
int spiral_detected = -1;
extern struct rr_binds d_rrb; /*!< binding to record-routing module */
extern struct tm_binds d_tmb;
extern struct dialog_ng_counters_h dialog_ng_cnts_h;
time_t act_time;
extern pv_elem_t *ruri_param_model; /*!< pv-string to get r-uri */
static unsigned int CURR_DLG_LIFETIME = 0; /*!< current dialog lifetime */
static unsigned int CURR_DLG_STATUS = 0; /*!< current dialog state */
static unsigned int CURR_DLG_ID = 0xffffffff; /*!< current dialog id */
/*! size of the dialog record-route parameter */
#define RR_DLG_PARAM_SIZE (2*2*sizeof(int)+3+MAX_DLG_RR_PARAM_NAME)
/*! separator inside the record-route paramter */
#define DLG_SEPARATOR '.'
/*!
* \brief Initialize the dialog handlers
* \param rr_param_p added record-route parameter
* \param dlg_flag_p dialog flag
* \param timeout_avp_p AVP for timeout setting
* \param default_timeout_p default timeout
* \param seq_match_mode_p matching mode
*/
void init_dlg_handlers(char *rr_param_p, int dlg_flag_p, pv_spec_t *timeout_avp_p, int default_timeout_p, int seq_match_mode_p) {
rr_param.s = rr_param_p;
rr_param.len = strlen(rr_param.s);
dlg_flag = 1 << dlg_flag_p;
timeout_avp = timeout_avp_p;
default_timeout = default_timeout_p;
seq_match_mode = seq_match_mode_p;
}
/*!
* \brief Shutdown operation of the module
*/
void destroy_dlg_handlers(void) {
shutdown_done = 1;
}
/*!
* \brief Add record-route parameter for dialog tracking
* \param req SIP request
* \param entry dialog hash entry
* \param id dialog hash id
* \return 0 on success, -1 on failure
*/
static inline int add_dlg_rr_param(struct sip_msg *req, unsigned int entry, unsigned int id) {
static char buf[RR_DLG_PARAM_SIZE];
str s;
int n;
char *p;
s.s = p = buf;
*(p++) = ';';
memcpy(p, rr_param.s, rr_param.len);
p += rr_param.len;
*(p++) = '=';
n = RR_DLG_PARAM_SIZE - (p - buf);
if (int2reverse_hex(&p, &n, entry) == -1)
return -1;
*(p++) = DLG_SEPARATOR;
n = RR_DLG_PARAM_SIZE - (p - buf);
if (int2reverse_hex(&p, &n, id) == -1)
return -1;
s.len = p - buf;
if (d_rrb.add_rr_param(req, &s) < 0) {
LM_ERR("failed to add rr param\n");
return -1;
}
return 0;
}
/*!
* \brief Unreference a dialog from tm callback (another wrapper)
* \param t transaction, unused
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
static void unref_dlg_from_cb(struct cell* t, int type, struct tmcb_params *param) {
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
LM_DBG("Unref dlg from callback called\n");
iuid = (dlg_iuid_t*) (*param->param);
if (iuid == NULL)
return;
dlg = dlg_get_by_iuid(iuid);
if (dlg == NULL)
return;
/* unref by 2: 1 set when adding in tm cb, 1 sent by dlg_get_by_iuid() */
unref_dlg(dlg, 2);
}
/*!
* \brief Parse SIP message and populate leg informations
*
* Parse SIP message and populate leg informations.
* \param dlg the dialog to add cseq, contact & record_route
* \param msg sip message
* \param t transaction
* \param leg type of the call leg
* \param tag SIP To tag
* \return 0 on success, -1 on failure
* \note for a request: get record route in normal order, for a reply get
* in reverse order, skipping the ones from the request and the proxies' own
*/
int populate_leg_info(struct dlg_cell *dlg, struct sip_msg *msg,
struct cell* t, unsigned int leg, str *tag) {
unsigned int skip_recs;
str cseq;
str contact;
str rr_set;
struct socket_info* callee_bind_address = NULL;
if (leg == DLG_CALLER_LEG)
dlg->caller_bind_addr = msg->rcv.bind_address;
else
callee_bind_address = msg->rcv.bind_address;
/* extract the cseq number as string from the request or response*/
//TO DO - can pair the cseqs here to make sure that the response and request are in sync
if ((!msg->cseq && (parse_headers(msg, HDR_CSEQ_F, 0) < 0 || !msg->cseq))
|| !msg->cseq->parsed) {
LM_ERR("bad sip message or missing CSeq hdr :-/\n");
goto error0;
}
cseq = (get_cseq(msg))->number;
/* extract the contact address */
if (!msg->contact && (parse_headers(msg, HDR_CONTACT_F, 0) < 0 || !msg->contact)) {
if (msg->first_line.type == SIP_REQUEST)
LM_ERR("bad sip message or missing Contact hdr for message [%.*s]\n", msg->first_line.u.request.method.len, msg->first_line.u.request.method.s);
else
LM_ERR("bad sip message or missing Contact hdr for message [%.*s]\n", msg->first_line.u.reply.status.len, msg->first_line.u.reply.status.s);
goto error0;
}
if (parse_contact(msg->contact) < 0 ||
((contact_body_t *) msg->contact->parsed)->contacts == NULL ||
((contact_body_t *) msg->contact->parsed)->contacts->next != NULL) {
LM_ERR("bad Contact HDR\n");
goto error0;
}
contact = ((contact_body_t *) msg->contact->parsed)->contacts->uri;
/* extract the RR parts */
if (!msg->record_route && (parse_headers(msg, HDR_EOH_F, 0) < 0)) {
LM_ERR("failed to parse record route header\n");
goto error0;
}
if (leg == DLG_CALLER_LEG) {
skip_recs = 0;
} else {
skip_recs = 0;
/* was the 200 OK received or local generated */
skip_recs = dlg->from_rr_nb +
((t->relayed_reply_branch >= 0) ?
((t->uac[t->relayed_reply_branch].flags & TM_UAC_FLAG_R2) ? 2 :
((t->uac[t->relayed_reply_branch].flags & TM_UAC_FLAG_RR) ? 1 : 0))
: 0);
}
if (msg->record_route) {
if (print_rr_body(msg->record_route, &rr_set, leg,
&skip_recs) != 0) {
LM_ERR("failed to print route records \n");
goto error0;
}
} else {
rr_set.s = 0;
rr_set.len = 0;
}
if (leg == DLG_CALLER_LEG)
dlg->from_rr_nb = skip_recs;
LM_DBG("route_set %.*s, contact %.*s, cseq %.*s and bind_addr %.*s [%p]\n",
rr_set.len, rr_set.s, contact.len, contact.s,
cseq.len, cseq.s,
msg->rcv.bind_address->sock_str.len,
msg->rcv.bind_address->sock_str.s, msg->rcv.bind_address);
if (dlg_set_leg_info(dlg, tag, &rr_set, &contact, &cseq, callee_bind_address, leg) != 0) {
LM_ERR("dlg_set_leg_info failed\n");
if (rr_set.s) pkg_free(rr_set.s);
goto error0;
}
if (rr_set.s) pkg_free(rr_set.s);
return 0;
error0:
return -1;
}
/*!
* \brief Clone dialog internal unique id to shared memory
*/
dlg_iuid_t *dlg_get_iuid_shm_clone(dlg_cell_t *dlg) {
dlg_iuid_t *iuid = NULL;
if (dlg == NULL)
return NULL;
iuid = (dlg_iuid_t*) shm_malloc(sizeof (dlg_iuid_t));
if (iuid == NULL) {
LM_ERR("failed to clone dialog iuid\n");
return NULL;
}
memset(iuid, 0, sizeof (dlg_iuid_t));
iuid->h_entry = dlg->h_entry;
iuid->h_id = dlg->h_id;
return iuid;
}
/*!
* \brief Free dialog internal unique id stored in shared memory
*/
void dlg_iuid_sfree(void *iuid) {
if (iuid) {
LM_DBG("freeing dlg iuid [%u:%u] (%p)\n",
((dlg_iuid_t*) iuid)->h_entry,
((dlg_iuid_t*) iuid)->h_id, iuid);
shm_free(iuid);
}
}
///*!
// * \brief Function that executes BYE reply callbacks
// * \param t transaction, unused
// * \param type type of the callback, should be TMCB_RESPONSE_FWDED
// * \param param saved dialog structure inside the callback
// */
//static void dlg_terminated_confirmed(struct cell* t,
// int type,
// struct tmcb_params* params) {
// if (!params || !params->req || !params->param) {
// LM_ERR("invalid parameters!\n");
// return;
// }
//
// struct dlg_cell* dlg = (struct dlg_cell*) *params->param;
//
// if (!dlg) {
// LM_ERR("failed to get dialog from params!\n");
// return;
// }
// /* dialog termination confirmed (BYE reply) */
// run_dlg_callbacks(DLGCB_TERMINATED_CONFIRMED,
// dlg,
// params->req,
// params->rpl,
// DLG_DIR_UPSTREAM,
// 0);
//}
static void dlg_cancel_confirmed(struct cell* t,
int type,
struct tmcb_params* params) {
if (!params || !params->req || !params->param) {
LM_ERR("invalid parameters!\n");
return;
}
struct dlg_cell* dlg = (struct dlg_cell*) *params->param;
if (!dlg) {
LM_ERR("failed to get dialog from params!\n");
return;
}
/* dialog termination confirmed (BYE reply) */
run_dlg_callbacks(DLGCB_TERMINATED_CONFIRMED,
dlg,
params->req,
params->rpl,
DLG_DIR_UPSTREAM,
0);
}
/*!
* \brief Execute callback for the BYE request and register callback for the BYE reply
* \param req request message
* \param dlg corresponding dialog
* \param dir message direction
*/
static void dlg_terminated(struct sip_msg* req,
struct dlg_cell* dlg,
unsigned int dir) {
if (!req) {
LM_ERR("request is empty!");
return;
}
if (!dlg) {
LM_ERR("dialog is empty!");
return;
}
/* dialog terminated (BYE) */
run_dlg_callbacks(DLGCB_TERMINATED, dlg, req, NULL, dir, 0);
// /* register callback for the coresponding reply */
// LM_DBG("Registering tmcb1\n");
// if (d_tmb.register_tmcb(req,
// 0,
// TMCB_RESPONSE_OUT,
// dlg_terminated_confirmed,
// (void*) dlg,
// 0) <= 0) {
// LM_ERR("cannot register response callback for BYE request\n");
// return;
// }
}
/*!
* \brief Execute callback for the BYE request and register callback for the BYE reply
* \param req request message
* \param dlg corresponding dialog
* \param dir message direction
*/
static void dlg_cancelled(struct sip_msg* req,
struct dlg_cell* dlg,
unsigned int dir) {
if (!req) {
LM_ERR("request is empty!");
return;
}
if (!dlg) {
LM_ERR("dialog is empty!");
return;
}
/* dialog terminated (BYE) */
run_dlg_callbacks(DLGCB_TERMINATED, dlg, req, NULL, dir, 0);
/* register callback for the coresponding reply */
LM_DBG("Registering tmcb for CANCEL confirmed\n");
if (d_tmb.register_tmcb(req,
0,
TMCB_RESPONSE_OUT,
dlg_cancel_confirmed,
(void*) dlg,
0) <= 0) {
LM_ERR("cannot register response callback for CANCEL request\n");
return;
}
}
//static void unlink_dlgouts_from_cb(struct cell* t, int type, struct tmcb_params *param) {
// struct dlg_cell *dlg = (struct dlg_cell *) (*param->param);
//
// if (!dlg)
// return;
// if (t && t->fwded_totags && t->fwded_totags->tag.len > 0) {
// LM_DBG("unlink_dlgouts_from_cb: transaction [%.*s] can now be removed IFF it has been marked for deletion\n", t->fwded_totags->tag.len, t->fwded_totags->tag.s);
// dlg_remove_dlg_out_tag(dlg, &t->fwded_totags->tag);
// }
//}
/*static void dlg_oncancel(struct cell* t, int type, struct tmcb_params *param) {
struct dlg_cell* dlg;
int unref = 0, old_state, new_state;
LM_DBG("RECEIVED CANCEL ON DIALOG......\n");
dlg = (struct dlg_cell *) (*param->param);
if (shutdown_done || dlg == 0)
return;
struct sip_msg *req = param->req;
old_state = dlg->state;
LM_DBG("DLG dialog id is entry:id [%i:%i]\n", dlg->h_entry, dlg->h_id);
next_state_dlg(dlg, DLG_EVENT_REQCANCEL, &old_state, &new_state, &unref, 0);
if (old_state != DLG_STATE_DELETED && new_state == DLG_STATE_DELETED)
dlg_cancelled(req, dlg, DLG_DIR_NONE);
unref_dlg(dlg, unref);
}*/
/*!
* \brief Helper function that run dialog callbacks on forwarded requests
* \see dlg_seq_up_onreply
* \see dlg_seq_down_onreply
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
* \param direction direction of the request
*/
static void dlg_seq_onreply_helper(struct cell* t, int type,
struct tmcb_params *param, const int direction) {
dlg_cell_t *dlg = NULL;
dlg_iuid_t *iuid = NULL;
if (shutdown_done)
return;
iuid = (dlg_iuid_t*) (*param->param);
dlg = dlg_get_by_iuid(iuid);
if (dlg == 0)
return;
if (type == TMCB_RESPONSE_FWDED) {
run_dlg_callbacks(DLGCB_RESPONSE_WITHIN,
dlg,
param->req,
param->rpl,
direction,
0);
}
dlg_release(dlg);
return;
}
/*!
* \brief Run dialog callbacks on forwarded requests in upstream direction
* \see dlg_seq_onreply_helper
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
*/
static void dlg_seq_up_onreply(struct cell* t, int type, struct tmcb_params *param) {
return dlg_seq_onreply_helper(t, type, param, DLG_DIR_UPSTREAM);
}
/*!
* \brief Run dialog callbacks on forwarded requests in downstream direction
* \see dlg_seq_onreply_helper
* \param t transaction, unused
* \param type type of the callback, should be TMCB_RESPONSE_FWDED
* \param param saved dialog structure inside the callback
*/
static void dlg_seq_down_onreply(struct cell* t, int type, struct tmcb_params *param) {
return dlg_seq_onreply_helper(t, type, param, DLG_DIR_DOWNSTREAM);
}
/*!
* \brief Return the timeout for a dialog
* \param req SIP message
* \return value from timeout AVP if present or default timeout
*/
inline static int get_dlg_timeout(struct sip_msg *req) {
pv_value_t pv_val;
if (timeout_avp) {
if (pv_get_spec_value(req, timeout_avp, &pv_val) == 0 &&
pv_val.flags & PV_VAL_INT && pv_val.ri > 0) {
return pv_val.ri;
}
LM_DBG("invalid AVP value, using default timeout\n");
}
return default_timeout;
}
/*!
* \brief Helper function to get the necessary content from SIP message
* \param req SIP request
* \param callid found callid
* \param ftag found from tag
* \param ttag found to tag
* \param with_ttag flag set if to tag must be found for success
* \return 0 on success, -1 on failure
*/
static inline int pre_match_parse(struct sip_msg *req, str *callid,
str *ftag, str *ttag, int with_ttag) {
if (parse_headers(req, HDR_CALLID_F | HDR_TO_F, 0) < 0 || !req->callid ||
!req->to) {
LM_ERR("bad request or missing CALLID/TO hdr :-/\n");
return -1;
}
if (get_to(req)->tag_value.len == 0) {
if (with_ttag == 1) {
/* out of dialog request with preloaded Route headers; ignore. */
return -1;
} else {
ttag->s = NULL;
ttag->len = 0;
}
} else {
*ttag = get_to(req)->tag_value;
}
if (parse_from_header(req) < 0 || get_from(req)->tag_value.len == 0) {
LM_ERR("failed to get From header\n");
return -1;
}
/* callid */
*callid = req->callid->body;
trim(callid);
/* from tag */
*ftag = get_from(req)->tag_value;
return 0;
}
static inline char* tm_type_to_string(int type) {
switch (type) {
case TMCB_REQUEST_IN:
return "TMCB_REQUEST_IN";
case TMCB_RESPONSE_IN:
return "TMCB_RESPONSE_IN";
case TMCB_E2EACK_IN:
return "TMCB_E2EACK_IN";
case TMCB_REQUEST_PENDING:
return "TMCB_REQUEST_PENDING";
case TMCB_REQUEST_FWDED:
return "TMCB_REQUEST_FWDED";
case TMCB_RESPONSE_FWDED:
return "TMCB_RESPONSE_FWDED";
case TMCB_ON_FAILURE_RO:
return "TMCB_ON_FAILURE_RO";
case TMCB_ON_FAILURE:
return "TMCB_ON_FAILURE";
case TMCB_REQUEST_OUT:
return "TMCB_REQUEST_OUT";
case TMCB_RESPONSE_OUT:
return "TMCB_RESPONSE_OUT";
case TMCB_LOCAL_COMPLETED:
return "TMCB_LOCAL_COMPLETED";
case TMCB_LOCAL_RESPONSE_OUT:
return "TMCB_LOCAL_RESPONSE_OUT";
case TMCB_ACK_NEG_IN:
return "TMCB_ACK_NEG_IN";
case TMCB_REQ_RETR_IN:
return "TMCB_REQ_RETR_IN";
case TMCB_LOCAL_RESPONSE_IN:
return "TMCB_LOCAL_RESPONSE_IN";
case TMCB_LOCAL_REQUEST_IN:
return "TMCB_LOCAL_REQUEST_IN";
case TMCB_DLG:
return "TMCB_DLG";
case TMCB_DESTROY:
return "TMCB_DESTROY";
case TMCB_E2ECANCEL_IN:
return "TMCB_E2ECANCEL_IN";
case TMCB_E2EACK_RETR_IN:
return "TMCB_E2EACK_RETR_IN";
case TMCB_RESPONSE_READY:
return "TMCB_RESPONSE_READY";
case TMCB_DONT_ACK:
return "TMCB_DONT_ACK";
case TMCB_REQUEST_SENT:
return "TMCB_REQUEST_SENT";
case TMCB_RESPONSE_SENT:
return "TMCB_RESPONSE_SENT";
case TMCB_ON_BRANCH_FAILURE:
return "TMCB_ON_BRANCH_FAILURE";
case TMCB_ON_BRANCH_FAILURE_RO:
return "TMCB_ON_BRANCH_FAILURE_RO";
case TMCB_MAX:
return "TMCB_MAX";
}
return "UNKNOWN";
}
/*!
* \brief Unreference a dialog (small wrapper to take care of shutdown)
* \see unref_dlg
* \param dialog unreferenced dialog
*/
/*static void unreference_dialog(void *dialog) {
// if the dialog table is gone, it means the system is shutting down.
if (!dialog || !d_table)
return;
unref_dlg((struct dlg_cell*) dialog, 1);
}*/
/*!
* \brief Parse the record-route parameter, to get dialog information back
* \param p start of parameter string
* \param end end of parameter string
* \param h_entry found dialog hash entry
* \param h_id found dialog hash id
* \return 0 on success, -1 on failure
*/
static inline int parse_dlg_rr_param(char *p, char *end, int *h_entry, int *h_id) {
char *s;
for (s = p; p < end && *p != DLG_SEPARATOR; p++);
if (*p != DLG_SEPARATOR) {
LM_ERR("malformed rr param '%.*s'\n", (int) (long) (end - s), s);
return -1;
}
if (reverse_hex2int(s, p - s, (unsigned int*) h_entry) < 0) {
LM_ERR("invalid hash entry '%.*s'\n", (int) (long) (p - s), s);
return -1;
}
if (reverse_hex2int(p + 1, end - (p + 1), (unsigned int*) h_id) < 0) {
LM_ERR("invalid hash id '%.*s'\n", (int) (long) (end - (p + 1)), p + 1);
return -1;
}
return 0;
}
/*!
* \brief Register a transaction on a dialog
* \param t transaction
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
/*static int store_dlg_in_tm(struct sip_msg* msg,
struct cell* t,
struct dlg_cell *dlg) {
if (!msg || msg == FAKED_REPLY || !t || !dlg) {
LM_ERR("invalid parameter msg(%p), t(%p), dlg(%p)\n", msg, t, dlg);
return -1;
}
if (get_dialog_from_tm(t)) {
LM_NOTICE("dialog %p is already set for this transaction!\n", dlg);
return 1;
}
// facilitate referencing of dialog through TMCB_MAX
if (d_tmb.register_tmcb(msg,
t,
TMCB_MAX,
dlg_tmcb_dummy,
(void*) dlg, unreference_dialog) < 0) {
LM_ERR("failed cache in T the shortcut to dlg %p\n", dlg);
return -3;
}
// registering succeeded, we must increase the reference counter
ref_dlg(dlg, 1);
return 0;
}*/
/*!
* \brief Callback to register a transaction on a dialog
* \param t transaction, unused
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
/*static void store_dlg_in_tm_cb(struct cell* t,
int type,
struct tmcb_params *param) {
struct dlg_cell *dlg = (struct dlg_cell *) (*param->param);
struct sip_msg* msg = param->rpl;
if (msg == NULL || msg == FAKED_REPLY) {
msg = param->req;
}
store_dlg_in_tm(msg, t, dlg);
}*/
/*!
* \brief Update the saved CSEQ information in dialog from SIP message
* \param dlg updated dialog
* \param req SIP request
* \param dir direction of request, must DLG_DIR_UPSTREAM or DLG_DIR_DOWNSTREAM
* \return 0 on success, -1 on failure
*/
static inline int update_cseqs(struct dlg_cell *dlg, struct sip_msg *req,
unsigned int dir, str *to_tag) {
if ((!req->cseq && parse_headers(req, HDR_CSEQ_F, 0) < 0) || !req->cseq ||
!req->cseq->parsed) {
LM_ERR("bad sip message or missing CSeq hdr :-/\n");
return -1;
}
if (dir == DLG_DIR_UPSTREAM) {
return dlg_update_cseq(dlg, DLG_CALLEE_LEG, &((get_cseq(req))->number), to_tag);
} else if (dir == DLG_DIR_DOWNSTREAM) {
return dlg_update_cseq(dlg, DLG_CALLER_LEG, &((get_cseq(req))->number), to_tag);
} else {
LM_CRIT("dir is not set!\n");
return -1;
}
}
/*!
* \brief Function that is registered as TM callback and called on requests
* \see dlg_new_dialog
* \param t transaction, used to created the dialog
* \param type type of the entered callback
* \param param saved dialog structure in the callback
*/
void dlg_onreq(struct cell* t, int type, struct tmcb_params *param) {
sip_msg_t *req = param->req;
dlg_cell_t *dlg = NULL;
if (req->first_line.u.request.method_value == METHOD_BYE) {
_dlg_ctx.t = 1;
return;
}
if (req->first_line.u.request.method_value != METHOD_INVITE/* && req->first_line.u.request.method_value != METHOD_CANCEL*/) {
return;
}
dlg = dlg_get_ctx_dialog();
if (dlg != NULL) {
if (spiral_detected == 1) {
LM_DBG("Running DLGB_SPIRALED callback\n");
run_dlg_callbacks(DLGCB_SPIRALED, dlg,
req, NULL, DLG_DIR_DOWNSTREAM, 0);
LM_DBG("This is a spiraled REQUEST\n");
} else if (spiral_detected == 0)
run_create_callbacks(dlg, req);
}
if (dlg == NULL) {
if ((req->flags & dlg_flag) != dlg_flag)
return;
LM_DBG("dialog creation on config flag\n");
dlg_new_dialog(req, t, 1);
dlg = dlg_get_ctx_dialog();
}
if (dlg != NULL) {
if (dlg_set_tm_callbacks(t, req, dlg, spiral_detected) !=0) {
LM_ERR("Failed to register TM Callbacks for dialog... this is bad!\n");
//the DLG_TM flag will not be set so at least we can clear the dialog later...
} else {
LM_DBG("dialog [%p] added to tm callbacks\n", dlg);
}
_dlg_ctx.t = 1;
dlg_release(dlg);
} else {
LM_ERR("Failed to create dialog.... this is bad\n");
}
}
/*!
* \brief Function that is registered as RR callback for dialog tracking
*
* Function that is registered as RR callback for dialog tracking. It
* sets the appropriate events after the SIP method and run the state
* machine to update the dialog state. It updates then the saved
* dialogs and also the statistics.
* \param req SIP request
* \param route_params record-route parameter
* \param param unused
*/
void dlg_onroute(struct sip_msg* req, str *route_params, void *param) {
dlg_cell_t *dlg;
dlg_iuid_t *iuid;
str val, callid, ftag, ttag;
int h_entry, h_id, new_state, old_state, unref, event, timeout;
unsigned int dir;
int ret = 0;
int reset = 1;
dlg = dlg_get_ctx_dialog();
if (dlg != NULL) {
dlg_release(dlg);
return;
}
/* skip initial requests - they may end up here because of the
* preloaded route */
if ((!req->to && parse_headers(req, HDR_TO_F, 0) < 0) || !req->to) {
LM_ERR("bad request or missing TO hdr :-/\n");
return;
}
if (get_to(req)->tag_value.len == 0) {
LM_DBG("No to tag header found --- ignoring... MESSAGE [%.*s\n", req->first_line.u.request.method.len, req->first_line.u.request.method.s);
return;
}
dlg = 0;
dir = DLG_DIR_NONE;
if (seq_match_mode != SEQ_MATCH_NO_ID) {
if (d_rrb.get_route_param(req, &rr_param, &val) != 0) {
LM_DBG("Route param '%.*s' not found\n", rr_param.len, rr_param.s);
if (seq_match_mode == SEQ_MATCH_STRICT_ID)
return;
} else {
LM_DBG("route param is '%.*s' (len=%d)\n", val.len, val.s, val.len);
if (parse_dlg_rr_param(val.s, val.s + val.len, &h_entry, &h_id) < 0)
return;
dlg = lookup_dlg(h_entry, h_id);
if (dlg == 0) {
LM_WARN("unable to find dialog for %.*s "
"with route param '%.*s' [%u:%u]\n",
req->first_line.u.request.method.len,
req->first_line.u.request.method.s,
val.len, val.s, h_entry, h_id);
if (seq_match_mode == SEQ_MATCH_STRICT_ID)
return;
} else {
if (pre_match_parse(req, &callid, &ftag, &ttag, 1) < 0) {
// lookup_dlg has incremented the ref count by 1
unref_dlg(dlg, 1);
return;
}
if (match_dialog(dlg, &callid, &ftag, &ttag, &dir) == 0) {
LM_WARN("tight matching failed for %.*s with callid='%.*s'/%d, "
"ftag='%.*s'/%d, ttag='%.*s'/%d and direction=%d\n",
req->first_line.u.request.method.len,
req->first_line.u.request.method.s,
callid.len, callid.s, callid.len,
ftag.len, ftag.s, ftag.len,
ttag.len, ttag.s, ttag.len, dir);
LM_WARN("dialog identification elements are callid='%.*s'/%d, "
"caller tag='%.*s'/%d\n",
dlg->callid.len, dlg->callid.s, dlg->callid.len,
dlg->from_tag.len, dlg->from_tag.s,
dlg->from_tag.len);
// lookup_dlg has incremented the ref count by 1
dlg_release(dlg);
// Reset variables in order to do a lookup based on SIP-Elements.
dlg = 0;
dir = DLG_DIR_NONE;
if (seq_match_mode == SEQ_MATCH_STRICT_ID)
return;
}
}
}
}
if (dlg == 0) {
if (pre_match_parse(req, &callid, &ftag, &ttag, 1) < 0)
return;
/* TODO - try to use the RR dir detection to speed up here the
* search -bogdan */
dlg = get_dlg(&callid, &ftag, &ttag, &dir);
if (!dlg) {
LM_DBG("Callid '%.*s' not found\n",
req->callid->body.len, req->callid->body.s);
return;
}
}
/* set current dialog - re-use ref increment from dlg_get() above */
set_current_dialog(req, dlg);
_dlg_ctx.iuid.h_entry = dlg->h_entry;
_dlg_ctx.iuid.h_id = dlg->h_id;
if (req->first_line.u.request.method_value != METHOD_ACK) {
iuid = dlg_get_iuid_shm_clone(dlg);
if (iuid != NULL) {
/* register callback for the replies of this request */
if (d_tmb.register_tmcb(req, 0, TMCB_RESPONSE_IN | TMCB_ON_FAILURE,
dlg_onreply, (void*) iuid, dlg_iuid_sfree) < 0) {
LM_ERR("failed to register TMCB (3)\n");
shm_free(iuid);
}
iuid = NULL;
}
}
// if (d_tmb.register_tmcb(req, NULL, TMCB_REQUEST_FWDED,
// store_dlg_in_tm_cb, (void*) dlg, NULL) < 0) {
// LM_ERR("failed to store dialog in transaction during dialog creation for later reference\n");
// }
/* run state machine */
switch (req->first_line.u.request.method_value) {
case METHOD_PRACK:
event = DLG_EVENT_REQPRACK;
break;
case METHOD_ACK:
event = DLG_EVENT_REQACK;
break;
case METHOD_BYE:
event = DLG_EVENT_REQBYE;
break;
// case METHOD_CANCEL:
// event = DLG_EVENT_REQCANCEL;
// break;
default:
event = DLG_EVENT_REQ;
}
next_state_dlg(dlg, event, &old_state, &new_state, &unref, 0);
LM_DBG("unref after next state is %i\n", unref);
CURR_DLG_ID = req->id;
CURR_DLG_LIFETIME = (unsigned int) (time(0)) - dlg->start_ts;
CURR_DLG_STATUS = new_state;
// dlg_run_event_route(dlg, req, old_state, new_state);
/* delay deletion of dialog until transaction has died off in order
* to absorb in-air messages */
if ((new_state == DLG_STATE_DELETED) && (old_state != DLG_STATE_DELETED)) {
iuid = dlg_get_iuid_shm_clone(dlg);
if (iuid != NULL) {
if (d_tmb.register_tmcb(req, NULL, TMCB_DESTROY,
unref_dlg_from_cb, (void*) iuid, dlg_iuid_sfree) < 0) {
LM_ERR("failed to register deletion delay function\n");
shm_free(iuid);
} else {
ref_dlg(dlg, 1);
}
}
// unref_dlg(dlg, unref);
}
// if (new_state == DLG_STATE_CONFIRMED && old_state != DLG_STATE_CONFIRMED)
// dlg_ka_add(dlg);
if (event == DLG_EVENT_REQCANCEL && new_state == DLG_STATE_DELETED &&
old_state != DLG_STATE_DELETED) {
LM_DBG("CANCEL successfully processed and old state was [%d]\n", old_state);
ret = remove_dialog_timer(&dlg->tl);
if (ret < 0) {
LM_CRIT("unable to unlink the timer on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s'\n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->from_tag.len, dlg->from_tag.s);
} else if (ret > 0) {
LM_WARN("inconsitent dlg timer data on dlg %p [%u:%u] "
"with clid '%.*s' and tags '%.*s' \n",
dlg, dlg->h_entry, dlg->h_id,
dlg->callid.len, dlg->callid.s,
dlg->from_tag.len, dlg->from_tag.s);
} else {
unref++;
}
dlg_terminated(req, dlg, dir);
unref_dlg(dlg, unref);
_dlg_ctx.cpid = my_pid();
_dlg_ctx.expect_t = 1;
dlg_set_ctx_iuid(dlg);
if (old_state == DLG_STATE_EARLY) {
counter_add(dialog_ng_cnts_h.early, -1);
} else if (old_state == DLG_STATE_CONFIRMED ||old_state == DLG_STATE_CONFIRMED_NA) {
counter_add(dialog_ng_cnts_h.active, -1);
}