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dispatcher.c
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dispatcher.c
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/**
* dispatcher module - load balancing
*
* Copyright (C) 2004-2005 FhG Fokus
* Copyright (C) 2006 Voice Sistem SRL
* Copyright (C) 2015 Daniel-Constantin Mierla (asipto.com)
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio 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
*
* Kamailio 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
*/
/*! \file
* \ingroup dispatcher
* \brief Dispatcher :: Dispatch
*/
/*! \defgroup dispatcher Dispatcher :: Load balancing and failover module
* The dispatcher module implements a set of functions for distributing SIP requests on a
* set of servers, but also grouping of server resources.
*
* - The module has an internal API exposed to other modules.
* - The module implements a couple of MI functions for managing the list of server resources
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "../../core/sr_module.h"
#include "../../core/dprint.h"
#include "../../core/error.h"
#include "../../core/ut.h"
#include "../../core/route.h"
#include "../../core/timer_proc.h"
#include "../../core/mem/mem.h"
#include "../../core/mod_fix.h"
#include "../../core/rpc.h"
#include "../../core/rpc_lookup.h"
#include "../../core/kemi.h"
#include "ds_ht.h"
#include "dispatch.h"
#include "config.h"
#include "api.h"
MODULE_VERSION
/* clang-format off */
#define DS_SET_ID_COL "setid"
#define DS_DEST_URI_COL "destination"
#define DS_DEST_FLAGS_COL "flags"
#define DS_DEST_PRIORITY_COL "priority"
#define DS_DEST_ATTRS_COL "attrs"
#define DS_TABLE_NAME "dispatcher"
/** parameters */
char *dslistfile = CFG_DIR"dispatcher.list";
int ds_force_dst = 1;
int ds_flags = 0;
int ds_use_default = 0;
str ds_xavp_dst = str_init("_dsdst_");
int ds_xavp_dst_mode = 0;
str ds_xavp_ctx = str_init("_dsctx_");
int ds_xavp_ctx_mode = 0;
str hash_pvar_param = STR_NULL;
str ds_xavp_dst_addr = str_init("uri");
str ds_xavp_dst_grp = str_init("grp");
str ds_xavp_dst_dstid = str_init("dstid");
str ds_xavp_dst_attrs = str_init("attrs");
str ds_xavp_dst_sock = str_init("sock");
str ds_xavp_dst_socket = str_init("socket");
str ds_xavp_dst_sockname = str_init("sockname");
str ds_xavp_ctx_cnt = str_init("cnt");
pv_elem_t * hash_param_model = NULL;
int probing_threshold = 1; /* number of failed requests, before a destination
* is taken into probing */
int inactive_threshold = 1; /* number of replied requests, before a destination
* is taken into back in active state */
str ds_ping_method = str_init("OPTIONS");
str ds_ping_from = str_init("sip:dispatcher@localhost");
static int ds_ping_interval = 0;
int ds_ping_latency_stats = 0;
int ds_latency_estimator_alpha_i = 900;
float ds_latency_estimator_alpha = 0.9f;
int ds_probing_mode = DS_PROBE_NONE;
static str ds_ping_reply_codes_str= STR_NULL;
static int** ds_ping_reply_codes = NULL;
static int* ds_ping_reply_codes_cnt;
str ds_default_socket = STR_NULL;
str ds_default_sockname = STR_NULL;
struct socket_info * ds_default_sockinfo = NULL;
int ds_hash_size = 0;
int ds_hash_expire = 7200;
int ds_hash_initexpire = 7200;
int ds_hash_check_interval = 30;
int ds_timer_mode = 0;
int ds_attrs_none = 0;
int ds_load_mode = 0;
uint32_t ds_dns_mode = DS_DNS_MODE_INIT;
static int ds_dns_interval = 600;
str ds_outbound_proxy = STR_NULL;
/* tm */
struct tm_binds tmb;
/*db */
str ds_db_url = STR_NULL;
str ds_set_id_col = str_init(DS_SET_ID_COL);
str ds_dest_uri_col = str_init(DS_DEST_URI_COL);
str ds_dest_flags_col = str_init(DS_DEST_FLAGS_COL);
str ds_dest_priority_col = str_init(DS_DEST_PRIORITY_COL);
str ds_dest_attrs_col = str_init(DS_DEST_ATTRS_COL);
str ds_table_name = str_init(DS_TABLE_NAME);
str ds_setid_pvname = STR_NULL;
pv_spec_t ds_setid_pv;
str ds_attrs_pvname = STR_NULL;
pv_spec_t ds_attrs_pv;
str ds_event_callback = STR_NULL;
str ds_db_extra_attrs = STR_NULL;
param_t *ds_db_extra_attrs_list = NULL;
static int ds_reload_delta = 5;
static time_t *ds_rpc_reload_time = NULL;
/** module functions */
static int mod_init(void);
static int child_init(int);
static int ds_parse_reply_codes();
static int ds_init_rpc(void);
static int w_ds_select(sip_msg_t*, char*, char*);
static int w_ds_select_limit(sip_msg_t*, char*, char*, char*);
static int w_ds_select_dst(struct sip_msg*, char*, char*);
static int w_ds_select_dst_limit(struct sip_msg*, char*, char*, char*);
static int w_ds_select_domain(struct sip_msg*, char*, char*);
static int w_ds_select_domain_limit(struct sip_msg*, char*, char*, char*);
static int w_ds_select_routes(sip_msg_t*, char*, char*);
static int w_ds_select_routes_limit(sip_msg_t*, char*, char*, char*);
static int w_ds_next_dst(struct sip_msg*, char*, char*);
static int w_ds_next_domain(struct sip_msg*, char*, char*);
static int w_ds_set_dst(struct sip_msg*, char*, char*);
static int w_ds_set_domain(struct sip_msg*, char*, char*);
static int w_ds_mark_dst0(struct sip_msg*, char*, char*);
static int w_ds_mark_dst1(struct sip_msg*, char*, char*);
static int w_ds_load_unset(struct sip_msg*, char*, char*);
static int w_ds_load_update(struct sip_msg*, char*, char*);
static int w_ds_is_from_list0(struct sip_msg*, char*, char*);
static int w_ds_is_from_list1(struct sip_msg*, char*, char*);
static int w_ds_is_from_list2(struct sip_msg*, char*, char*);
static int w_ds_is_from_list3(struct sip_msg*, char*, char*, char*);
static int w_ds_list_exist(struct sip_msg*, char*, char*);
static int w_ds_reload(struct sip_msg* msg, char*, char*);
static int w_ds_is_active(sip_msg_t *msg, char *pset, char *p2);
static int w_ds_is_active_uri(sip_msg_t *msg, char *pset, char *puri);
static int fixup_ds_is_from_list(void** param, int param_no);
static int fixup_ds_list_exist(void** param,int param_no);
static void destroy(void);
static int ds_warn_fixup(void** param, int param_no);
static int pv_get_dsv(sip_msg_t *msg, pv_param_t *param, pv_value_t *res);
static int pv_parse_dsv(pv_spec_p sp, str *in);
static pv_export_t mod_pvs[] = {
{ {"dsv", (sizeof("dsv")-1)}, PVT_OTHER, pv_get_dsv, 0,
pv_parse_dsv, 0, 0, 0 },
{ {0, 0}, 0, 0, 0, 0, 0, 0, 0 }
};
static cmd_export_t cmds[]={
{"ds_select", (cmd_function)w_ds_select, 2,
fixup_igp_igp, 0, ANY_ROUTE},
{"ds_select", (cmd_function)w_ds_select_limit, 3,
fixup_igp_all, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_dst", (cmd_function)w_ds_select_dst, 2,
fixup_igp_igp, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_dst", (cmd_function)w_ds_select_dst_limit, 3,
fixup_igp_all, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_domain", (cmd_function)w_ds_select_domain, 2,
fixup_igp_igp, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_domain", (cmd_function)w_ds_select_domain_limit, 3,
fixup_igp_all, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_routes", (cmd_function)w_ds_select_routes, 2,
fixup_spve_spve, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_select_routes", (cmd_function)w_ds_select_routes_limit, 3,
fixup_spve_spve_igp, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_next_dst", (cmd_function)w_ds_next_dst, 0,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_next_domain", (cmd_function)w_ds_next_domain, 0,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_set_dst", (cmd_function)w_ds_set_dst, 0,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_set_domain", (cmd_function)w_ds_set_domain, 0,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE},
{"ds_mark_dst", (cmd_function)w_ds_mark_dst0, 0,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE},
{"ds_mark_dst", (cmd_function)w_ds_mark_dst1, 1,
ds_warn_fixup, 0, REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE},
{"ds_is_from_list", (cmd_function)w_ds_is_from_list0, 0,
0, 0, REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE},
{"ds_is_from_list", (cmd_function)w_ds_is_from_list1, 1,
fixup_igp_null, 0, ANY_ROUTE},
{"ds_is_from_list", (cmd_function)w_ds_is_from_list2, 2,
fixup_ds_is_from_list, 0, ANY_ROUTE},
{"ds_is_from_list", (cmd_function)w_ds_is_from_list3, 3,
fixup_ds_is_from_list, 0, ANY_ROUTE},
{"ds_list_exist", (cmd_function)w_ds_list_exist, 1,
fixup_ds_list_exist, 0, ANY_ROUTE},
{"ds_list_exists", (cmd_function)w_ds_list_exist, 1,
fixup_ds_list_exist, 0, ANY_ROUTE},
{"ds_load_unset", (cmd_function)w_ds_load_unset, 0,
0, 0, ANY_ROUTE},
{"ds_load_update", (cmd_function)w_ds_load_update, 0,
0, 0, ANY_ROUTE},
{"ds_is_active", (cmd_function)w_ds_is_active, 1,
fixup_igp_null, fixup_free_igp_null, ANY_ROUTE},
{"ds_is_active", (cmd_function)w_ds_is_active_uri, 2,
fixup_igp_spve, fixup_free_igp_spve, ANY_ROUTE},
{"bind_dispatcher", (cmd_function)bind_dispatcher, 0,
0, 0, 0},
{"ds_reload", (cmd_function)w_ds_reload, 0,
0, 0, ANY_ROUTE},
{0,0,0,0,0,0}
};
static param_export_t params[]={
{"list_file", PARAM_STRING, &dslistfile},
{"db_url", PARAM_STR, &ds_db_url},
{"table_name", PARAM_STR, &ds_table_name},
{"setid_col", PARAM_STR, &ds_set_id_col},
{"destination_col", PARAM_STR, &ds_dest_uri_col},
{"flags_col", PARAM_STR, &ds_dest_flags_col},
{"priority_col", PARAM_STR, &ds_dest_priority_col},
{"attrs_col", PARAM_STR, &ds_dest_attrs_col},
{"force_dst", INT_PARAM, &ds_force_dst},
{"flags", INT_PARAM, &ds_flags},
{"use_default", INT_PARAM, &ds_use_default},
{"xavp_dst", PARAM_STR, &ds_xavp_dst},
{"xavp_dst_mode", PARAM_INT, &ds_xavp_dst_mode},
{"xavp_ctx", PARAM_STR, &ds_xavp_ctx},
{"xavp_ctx_mode", PARAM_INT, &ds_xavp_ctx_mode},
{"hash_pvar", PARAM_STR, &hash_pvar_param},
{"setid_pvname", PARAM_STR, &ds_setid_pvname},
{"attrs_pvname", PARAM_STR, &ds_attrs_pvname},
{"ds_probing_threshold", INT_PARAM, &probing_threshold},
{"ds_inactive_threshold", INT_PARAM, &inactive_threshold},
{"ds_ping_method", PARAM_STR, &ds_ping_method},
{"ds_ping_from", PARAM_STR, &ds_ping_from},
{"ds_ping_interval", INT_PARAM, &ds_ping_interval},
{"ds_ping_latency_stats", INT_PARAM, &ds_ping_latency_stats},
{"ds_latency_estimator_alpha", INT_PARAM, &ds_latency_estimator_alpha_i},
{"ds_ping_reply_codes", PARAM_STR, &ds_ping_reply_codes_str},
{"ds_probing_mode", INT_PARAM, &ds_probing_mode},
{"ds_hash_size", INT_PARAM, &ds_hash_size},
{"ds_hash_expire", INT_PARAM, &ds_hash_expire},
{"ds_hash_initexpire", INT_PARAM, &ds_hash_initexpire},
{"ds_hash_check_interval", INT_PARAM, &ds_hash_check_interval},
{"outbound_proxy", PARAM_STR, &ds_outbound_proxy},
{"ds_default_socket", PARAM_STR, &ds_default_socket},
{"ds_default_sockname",PARAM_STR, &ds_default_sockname},
{"ds_timer_mode", PARAM_INT, &ds_timer_mode},
{"event_callback", PARAM_STR, &ds_event_callback},
{"ds_attrs_none", PARAM_INT, &ds_attrs_none},
{"ds_db_extra_attrs", PARAM_STR, &ds_db_extra_attrs},
{"ds_load_mode", PARAM_INT, &ds_load_mode},
{"reload_delta", PARAM_INT, &ds_reload_delta },
{"ds_dns_mode", PARAM_INT, &ds_dns_mode},
{"ds_dns_interval", PARAM_INT, &ds_dns_interval},
{0,0,0}
};
/** module exports */
struct module_exports exports= {
"dispatcher", /* module name */
DEFAULT_DLFLAGS, /* dlopen flags */
cmds, /* cmd (cfg function) exports */
params, /* param exports */
0, /* exported rpc functions */
mod_pvs, /* exported pseudo-variables */
0, /* response handling function */
mod_init, /* module init function */
child_init, /* per-child init function */
destroy /* module destroy function */
};
/* clang-format on */
/**
* init module function
*/
static int mod_init(void)
{
str host;
int port, proto;
param_hooks_t phooks;
param_t *pit = NULL;
if(ds_dns_mode & DS_DNS_MODE_TIMER) {
if(ds_dns_interval<=0) {
LM_WARN("dns interval parameter not set - using 600\n");
ds_dns_interval = 600;
}
if(sr_wtimer_add(ds_dns_timer, NULL, ds_dns_interval) < 0) {
return -1;
}
}
if(ds_ping_active_init() < 0) {
return -1;
}
if(ds_init_rpc() < 0) {
LM_ERR("failed to register RPC commands\n");
return -1;
}
if(cfg_declare("dispatcher", dispatcher_cfg_def, &default_dispatcher_cfg,
cfg_sizeof(dispatcher), &dispatcher_cfg)) {
LM_ERR("Fail to declare the configuration\n");
return -1;
}
/* Initialize the counter */
ds_ping_reply_codes = (int **)shm_malloc(sizeof(unsigned int *));
*ds_ping_reply_codes = 0;
ds_ping_reply_codes_cnt = (int *)shm_malloc(sizeof(int));
*ds_ping_reply_codes_cnt = 0;
if(ds_ping_reply_codes_str.s) {
cfg_get(dispatcher, dispatcher_cfg, ds_ping_reply_codes_str) =
ds_ping_reply_codes_str;
if(ds_parse_reply_codes() < 0) {
return -1;
}
}
/* copy threshholds to config */
cfg_get(dispatcher, dispatcher_cfg, probing_threshold) = probing_threshold;
cfg_get(dispatcher, dispatcher_cfg, inactive_threshold) =
inactive_threshold;
if(ds_default_sockname.s && ds_default_sockname.len > 0) {
ds_default_sockinfo = ksr_get_socket_by_name(&ds_default_sockname);
if(ds_default_sockinfo == 0) {
LM_ERR("non-local socket name <%.*s>\n", ds_default_sockname.len,
ds_default_sockname.s);
return -1;
}
LM_INFO("default dispatcher socket set by name to <%.*s>\n",
ds_default_sockname.len, ds_default_sockname.s);
} else {
if(ds_default_socket.s && ds_default_socket.len > 0) {
if(parse_phostport(
ds_default_socket.s, &host.s, &host.len, &port, &proto)
!= 0) {
LM_ERR("bad socket <%.*s>\n", ds_default_socket.len,
ds_default_socket.s);
return -1;
}
ds_default_sockinfo =
grep_sock_info(&host, (unsigned short)port, proto);
if(ds_default_sockinfo == 0) {
LM_ERR("non-local socket <%.*s>\n", ds_default_socket.len,
ds_default_socket.s);
return -1;
}
LM_INFO("default dispatcher socket set to <%.*s>\n",
ds_default_socket.len, ds_default_socket.s);
}
}
if(ds_init_data() != 0)
return -1;
if(ds_db_url.s) {
if(ds_db_extra_attrs.s!=NULL && ds_db_extra_attrs.len>2) {
if(ds_db_extra_attrs.s[ds_db_extra_attrs.len-1]==';') {
ds_db_extra_attrs.len--;
}
if (parse_params(&ds_db_extra_attrs, CLASS_ANY, &phooks,
&ds_db_extra_attrs_list)<0) {
LM_ERR("failed to parse extra attrs parameter\n");
return -1;
}
for(pit = ds_db_extra_attrs_list; pit!=NULL; pit=pit->next) {
if(pit->body.s==NULL || pit->body.len<=0) {
LM_ERR("invalid db extra attrs parameter\n");
return -1;
}
}
}
if(ds_init_db() != 0) {
LM_ERR("could not initiate a connect to the database\n");
return -1;
}
} else {
if(ds_load_list(dslistfile) != 0) {
LM_ERR("no dispatching list loaded from file\n");
return -1;
} else {
LM_DBG("loaded dispatching list\n");
}
}
if(hash_pvar_param.s && *hash_pvar_param.s) {
if(pv_parse_format(&hash_pvar_param, &hash_param_model) < 0
|| hash_param_model == NULL) {
LM_ERR("malformed PV string: %s\n", hash_pvar_param.s);
return -1;
}
} else {
hash_param_model = NULL;
}
if(ds_setid_pvname.s != 0) {
if(pv_parse_spec(&ds_setid_pvname, &ds_setid_pv) == NULL
|| !pv_is_w(&ds_setid_pv)) {
LM_ERR("[%s]- invalid setid_pvname\n", ds_setid_pvname.s);
return -1;
}
}
if(ds_attrs_pvname.s != 0) {
if(pv_parse_spec(&ds_attrs_pvname, &ds_attrs_pv) == NULL
|| !pv_is_w(&ds_attrs_pv)) {
LM_ERR("[%s]- invalid attrs_pvname\n", ds_attrs_pvname.s);
return -1;
}
}
if(ds_hash_size > 0) {
if(ds_hash_load_init(
1 << ds_hash_size, ds_hash_expire, ds_hash_initexpire)
< 0)
return -1;
if(ds_timer_mode == 1) {
if(sr_wtimer_add(ds_ht_timer, NULL, ds_hash_check_interval) < 0)
return -1;
} else {
if(register_timer(ds_ht_timer, NULL, ds_hash_check_interval)
< 0)
return -1;
}
}
/* Only, if the Probing-Timer is enabled the TM-API needs to be loaded: */
if(ds_ping_interval > 0) {
/*****************************************************
* TM-Bindings
*****************************************************/
if(load_tm_api(&tmb) == -1) {
LM_ERR("could not load the TM-functions - disable DS ping\n");
return -1;
}
/*****************************************************
* Register the PING-Timer
*****************************************************/
if(ds_timer_mode == 1) {
if(sr_wtimer_add(ds_check_timer, NULL, ds_ping_interval) < 0)
return -1;
} else {
if(register_timer(ds_check_timer, NULL, ds_ping_interval) < 0)
return -1;
}
}
if (ds_latency_estimator_alpha_i > 0 && ds_latency_estimator_alpha_i < 1000) {
ds_latency_estimator_alpha = ds_latency_estimator_alpha_i/1000.0f;
} else {
LM_ERR("invalid ds_latency_estimator_alpha must be between 0 and 1000,"
" using default[%.3f]\n", ds_latency_estimator_alpha);
}
ds_rpc_reload_time = shm_malloc(sizeof(time_t));
if(ds_rpc_reload_time == NULL) {
SHM_MEM_ERROR;
return -1;
}
*ds_rpc_reload_time = 0;
return 0;
}
/*! \brief
* Initialize children
*/
static int child_init(int rank)
{
return 0;
}
/*! \brief
* destroy function
*/
static void destroy(void)
{
ds_destroy_list();
if(ds_db_url.s)
ds_disconnect_db();
ds_hash_load_destroy();
if(ds_ping_reply_codes)
shm_free(ds_ping_reply_codes);
if(ds_ping_reply_codes_cnt)
shm_free(ds_ping_reply_codes_cnt);
if(ds_rpc_reload_time!=NULL) {
shm_free(ds_rpc_reload_time);
ds_rpc_reload_time = 0;
}
}
#define GET_VALUE(param_name, param, i_value, s_value, value_flags) \
do { \
if(get_is_fparam(&(i_value), &(s_value), msg, (fparam_t *)(param), \
&(value_flags)) \
!= 0) { \
LM_ERR("no %s value\n", (param_name)); \
return -1; \
} \
} while(0)
/*! \brief
* parses string to dispatcher dst flags set
* returns <0 on failure or int with flag on success.
*/
int ds_parse_flags(char *flag_str, int flag_len)
{
int flag = 0;
int i;
for(i = 0; i < flag_len; i++) {
if(flag_str[i] == 'a' || flag_str[i] == 'A') {
flag &= ~(DS_STATES_ALL);
} else if(flag_str[i] == 'i' || flag_str[i] == 'I') {
flag |= DS_INACTIVE_DST;
} else if(flag_str[i] == 'd' || flag_str[i] == 'D') {
flag |= DS_DISABLED_DST;
} else if(flag_str[i] == 't' || flag_str[i] == 'T') {
flag |= DS_TRYING_DST;
} else if(flag_str[i] == 'p' || flag_str[i] == 'P') {
flag |= DS_PROBING_DST;
} else {
flag = -1;
break;
}
}
return flag;
}
/**
*
*/
static int w_ds_select_addr(
sip_msg_t *msg, char *set, char *alg, char *limit, int mode)
{
unsigned int algo_flags, set_flags, limit_flags;
str s_algo = STR_NULL;
str s_set = STR_NULL;
str s_limit = STR_NULL;
int a, s, l;
if(msg == NULL)
return -1;
GET_VALUE("destination set", set, s, s_set, set_flags);
if(!(set_flags & PARAM_INT)) {
if(set_flags & PARAM_STR)
LM_ERR("unable to get destination set from [%.*s]\n", s_set.len,
s_set.s);
else
LM_ERR("unable to get destination set\n");
return -1;
}
GET_VALUE("algorithm", alg, a, s_algo, algo_flags);
if(!(algo_flags & PARAM_INT)) {
if(algo_flags & PARAM_STR)
LM_ERR("unable to get algorithm from [%.*s]\n", s_algo.len,
s_algo.s);
else
LM_ERR("unable to get algorithm\n");
return -1;
}
if(limit) {
GET_VALUE("limit", limit, l, s_limit, limit_flags);
if(!(limit_flags & PARAM_INT)) {
if(limit_flags & PARAM_STR)
LM_ERR("unable to get dst number limit from [%.*s]\n",
s_limit.len, s_limit.s);
else
LM_ERR("unable to get dst number limit\n");
return -1;
}
} else {
l = -1; /* will be casted to a rather big unsigned value */
}
return ds_select_dst_limit(msg, s, a, (unsigned int)l, mode);
}
/**
*
*/
static int w_ds_select(struct sip_msg *msg, char *set, char *alg)
{
return w_ds_select_addr(msg, set, alg, 0 /* limit number of dst*/,
DS_SETOP_XAVP /*set no dst/uri*/);
}
/**
*
*/
static int w_ds_select_limit(
struct sip_msg *msg, char *set, char *alg, char *limit)
{
return w_ds_select_addr(msg, set, alg, limit /* limit number of dst*/,
DS_SETOP_XAVP /*set no dst/uri*/);
}
/**
*
*/
static int w_ds_select_dst(struct sip_msg *msg, char *set, char *alg)
{
return w_ds_select_addr(msg, set, alg, 0 /* limit number of dst*/,
DS_SETOP_DSTURI /*set dst uri*/);
}
/**
*
*/
static int w_ds_select_dst_limit(
struct sip_msg *msg, char *set, char *alg, char *limit)
{
return w_ds_select_addr(msg, set, alg, limit /* limit number of dst*/,
DS_SETOP_DSTURI /*set dst uri*/);
}
/**
*
*/
static int w_ds_select_domain(struct sip_msg *msg, char *set, char *alg)
{
return w_ds_select_addr(msg, set, alg, 0 /* limit number of dst*/,
DS_SETOP_RURI /*set host port*/);
}
/**
*
*/
static int w_ds_select_domain_limit(
struct sip_msg *msg, char *set, char *alg, char *limit)
{
return w_ds_select_addr(msg, set, alg, limit /* limit number of dst*/,
DS_SETOP_RURI /*set host port*/);
}
/**
*
*/
static int ki_ds_select_routes_limit(sip_msg_t *msg, str *srules, str *smode,
int rlimit)
{
int i;
int vret;
int gret;
sr_xval_t nxval;
ds_select_state_t vstate;
memset(&vstate, 0, sizeof(ds_select_state_t));
vstate.limit = (uint32_t)rlimit;
if(vstate.limit == 0) {
LM_DBG("Limit set to 0 - forcing to unlimited\n");
vstate.limit = 0xffffffff;
}
vret = -1;
gret = -1;
i = 0;
while(i<srules->len) {
vstate.setid = 0;
for(; i<srules->len; i++) {
if(srules->s[i]<'0' || srules->s[i]>'9') {
if(srules->s[i]=='=') {
i++;
break;
} else {
LM_ERR("invalid character in [%.*s] at [%d]\n",
srules->len, srules->s, i);
return -1;
}
}
vstate.setid = (vstate.setid * 10) + (srules->s[i] - '0');
}
vstate.alg = 0;
for(; i<srules->len; i++) {
if(srules->s[i]<'0' || srules->s[i]>'9') {
if(srules->s[i]==';') {
i++;
break;
} else {
LM_ERR("invalid character in [%.*s] at [%d]\n",
srules->len, srules->s, i);
return -1;
}
}
vstate.alg = (vstate.alg * 10) + (srules->s[i] - '0');
}
LM_DBG("routing with setid=%d alg=%d cnt=%d limit=0x%x (%u)\n",
vstate.setid, vstate.alg, vstate.cnt, vstate.limit, vstate.limit);
vstate.umode = DS_SETOP_XAVP;
/* if no r-uri/d-uri was set already, keep using the update mode
* specified by the param, then just add to xavps list */
if(vstate.emode==0) {
switch(smode->s[0]) {
case '0':
case 'd':
case 'D':
vstate.umode = DS_SETOP_DSTURI;
break;
case '1':
case 'r':
case 'R':
vstate.umode = DS_SETOP_RURI;
break;
case '2':
case 'x':
case 'X':
break;
default:
LM_ERR("invalid routing mode parameter: %.*s\n",
smode->len, smode->s);
return -1;
}
}
vret = ds_manage_routes(msg, &vstate);
if(vret<0) {
LM_DBG("failed to select target destinations from %d=%d [%.*s]\n",
vstate.setid, vstate.alg, srules->len, srules->s);
/* continue to try other target groups */
} else {
if(vret>0) {
gret = vret;
}
}
}
if(gret<0) {
/* no selection of a target address */
LM_DBG("failed to select any target destinations from [%.*s]\n",
srules->len, srules->s);
/* return last failure code when trying to select target addresses */
return vret;
}
/* add cnt value to xavp */
if(((ds_xavp_ctx_mode & DS_XAVP_CTX_SKIP_CNT)==0)
&& (ds_xavp_ctx.len >= 0)) {
/* add to xavp the number of selected dst records */
memset(&nxval, 0, sizeof(sr_xval_t));
nxval.type = SR_XTYPE_INT;
nxval.v.i = vstate.cnt;
if(xavp_add_xavp_value(&ds_xavp_ctx, &ds_xavp_ctx_cnt, &nxval, NULL)==NULL) {
LM_ERR("failed to add cnt value to xavp\n");
return -1;
}
}
LM_DBG("selected target destinations: %d\n", vstate.cnt);
return gret;
}
/**
*
*/
static int ki_ds_select_routes(sip_msg_t *msg, str *srules, str *smode)
{
return ki_ds_select_routes_limit(msg, srules, smode, 0);
}
/**
*
*/
static int w_ds_select_routes(sip_msg_t *msg, char *lrules, char *umode)
{
return w_ds_select_routes_limit(msg, lrules, umode, 0);
}
/**
*
*/
static int w_ds_select_routes_limit(sip_msg_t *msg, char *lrules, char *umode,
char *rlimit)
{
str vrules;
str vmode;
int vlimit;
if(fixup_get_svalue(msg, (gparam_t*)lrules, &vrules)<0) {
LM_ERR("failed to get routing rules parameter\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)umode, &vmode)<0) {
LM_ERR("failed to get update mode parameter\n");
return -1;
}
if(rlimit!=NULL) {
if(fixup_get_ivalue(msg, (gparam_t*)rlimit, &vlimit)<0) {
LM_ERR("failed to get limit parameter\n");
return -1;
}
} else {
vlimit = 0;
}
return ki_ds_select_routes_limit(msg, &vrules, &vmode, vlimit);
}
/**
*
*/
static int w_ds_next_dst(struct sip_msg *msg, char *str1, char *str2)
{
return ds_update_dst(msg, DS_USE_NEXT, DS_SETOP_DSTURI /*set dst uri*/);
}
/**
*
*/
static int w_ds_next_domain(struct sip_msg *msg, char *str1, char *str2)
{
return ds_update_dst(msg, DS_USE_NEXT, DS_SETOP_RURI /*set host port*/);
}
/**
*
*/
static int w_ds_set_dst(struct sip_msg *msg, char *str1, char *str2)
{
return ds_update_dst(msg, DS_USE_CRT, DS_SETOP_DSTURI /*set dst uri*/);
}
/**
*
*/
static int w_ds_set_domain(struct sip_msg *msg, char *str1, char *str2)
{
return ds_update_dst(msg, DS_USE_CRT, DS_SETOP_RURI /*set host port*/);
}
/**
*
*/
static int ki_ds_mark_dst(sip_msg_t *msg)
{
int state;
state = DS_INACTIVE_DST;
if(ds_probing_mode == DS_PROBE_ALL)
state |= DS_PROBING_DST;
return ds_mark_dst(msg, state);
}
/**
*
*/
static int w_ds_mark_dst0(struct sip_msg *msg, char *str1, char *str2)
{
return ki_ds_mark_dst(msg);
}
/**
*
*/
static int ki_ds_mark_dst_state(sip_msg_t *msg, str *sval)
{
int state;
if(sval->s == NULL || sval->len == 0)
return ki_ds_mark_dst(msg);
state = ds_parse_flags(sval->s, sval->len);
if(state < 0) {
LM_WARN("Failed to parse state flags: %.*s", sval->len, sval->s);
return -1;
}
return ds_mark_dst(msg, state);
}
/**
*
*/
static int w_ds_mark_dst1(struct sip_msg *msg, char *str1, char *str2)
{
str sval;
sval.s = str1;
sval.len = strlen(str1);
return ki_ds_mark_dst_state(msg, &sval);
}
/**
*
*/
static int w_ds_load_unset(struct sip_msg *msg, char *str1, char *str2)
{
if(ds_load_unset(msg) < 0)
return -1;
return 1;
}
/**
*
*/
static int w_ds_load_update(struct sip_msg *msg, char *str1, char *str2)
{
if(ds_load_update(msg) < 0)
return -1;
return 1;
}
/**
*
*/
static int ds_warn_fixup(void **param, int param_no)
{
if(ds_xavp_dst.len<=0 || ds_xavp_ctx.len<=0) {
LM_ERR("failover functions used, but required XAVP parameters"
" are NULL -- feature disabled\n");
}
return 0;
}
static int ds_reload(sip_msg_t *msg)
{
if(ds_rpc_reload_time==NULL) {
LM_ERR("not ready for reload\n");
return -1;
}
if(*ds_rpc_reload_time!=0 && *ds_rpc_reload_time > time(NULL) - ds_reload_delta) {
LM_ERR("ongoing reload\n");
return -1;
}
*ds_rpc_reload_time = time(NULL);
if(!ds_db_url.s) {
if(ds_load_list(dslistfile) != 0) {
LM_ERR("Error reloading from list\n");
return -1;
}
} else {
if(ds_reload_db() < 0) {
LM_ERR("Error reloading from db\n");
return -1;
}
}
LM_DBG("reloaded dispatcher\n");
return 1;
}
static int w_ds_reload(struct sip_msg *msg, char *str1, char *str2)
{
return ds_reload(msg);
}
static int w_ds_is_from_list0(struct sip_msg *msg, char *str1, char *str2)
{