Module: kamailio
Branch: 5.3
Commit: 88676c2f083c2d7e52ae6b42f5cbe83f64357865
URL: 
https://github.com/kamailio/kamailio/commit/88676c2f083c2d7e52ae6b42f5cbe83f64357865

Author: Federico Cabiddu <[email protected]>
Committer: Henning Westerholt <[email protected]>
Date: 2020-06-07T09:13:21Z

dispatcher: don't reset load table when adding/removing a destination or 
reloading the list

(cherry picked from commit 4099a6caf856c9af4d7d89aec73db143efbcd40b)

---

Modified: src/modules/dispatcher/dispatch.c

---

Diff:  
https://github.com/kamailio/kamailio/commit/88676c2f083c2d7e52ae6b42f5cbe83f64357865.diff
Patch: 
https://github.com/kamailio/kamailio/commit/88676c2f083c2d7e52ae6b42f5cbe83f64357865.patch

---

diff --git a/src/modules/dispatcher/dispatch.c 
b/src/modules/dispatcher/dispatch.c
index 36cf884b48..d66a48e919 100644
--- a/src/modules/dispatcher/dispatch.c
+++ b/src/modules/dispatcher/dispatch.c
@@ -870,7 +870,7 @@ int ds_load_list(char *lfile)
        /* Update list - should it be sync'ed? */
        _ds_list_nr = setn;
        *crt_idx = *next_idx;
-       ds_ht_clear_slots(_dsht_load);
+       
        ds_log_sets();
        return 0;
 
@@ -1118,7 +1118,6 @@ int ds_load_db(void)
        /* update data - should it be sync'ed? */
        _ds_list_nr = setn;
        *crt_idx = *next_idx;
-       ds_ht_clear_slots(_dsht_load);
 
        ds_log_sets();
 
@@ -1609,22 +1608,24 @@ int ds_load_replace(struct sip_msg *msg, str *duid)
                                break;
                }
        }
+       /* old destination has not been found: has been removed meanwhile? */
        if(olddst == -1) {
-               ds_unlock_cell(_dsht_load, &msg->callid->body);
-               LM_ERR("old destination address not found for [%d, %.*s]\n", 
set,
+               LM_WARN("old destination address not found for [%d, %.*s]\n", 
set,
                                it->duid.len, it->duid.s);
-               return -1;
-       }
+       } 
        if(newdst == -1) {
+               /* new destination has not been found: has been removed 
meanwhile? */
                ds_unlock_cell(_dsht_load, &msg->callid->body);
                LM_ERR("new destination address not found for [%d, %.*s]\n", 
set,
                                duid->len, duid->s);
-               return -1;
+               return -2;
        }
 
        ds_unlock_cell(_dsht_load, &msg->callid->body);
        ds_del_cell(_dsht_load, &msg->callid->body);
-       DS_LOAD_DEC(idx, olddst);
+       
+       if(olddst != -1)
+               DS_LOAD_DEC(idx, olddst);
 
        if(ds_load_add(msg, idx, set, newdst) < 0) {
                LM_ERR("unable to replace destination load [%.*s / %.*s]\n", 
duid->len,
@@ -2317,6 +2318,7 @@ int ds_manage_routes(sip_msg_t *msg, ds_select_state_t 
*rstate)
 int ds_update_dst(struct sip_msg *msg, int upos, int mode)
 {
 
+       int ret;
        socket_info_t *sock = NULL;
        sr_xavp_t *rxavp = NULL;
        sr_xavp_t *lxavp = NULL;
@@ -2329,6 +2331,7 @@ int ds_update_dst(struct sip_msg *msg, int upos, int mode)
                }
        }
 
+next_dst:
        rxavp = xavp_get(&ds_xavp_dst, NULL);
        if(rxavp == NULL || rxavp->val.type != SR_XTYPE_XAVP) {
                LM_DBG("no xavp with previous destination record\n");
@@ -2376,12 +2379,18 @@ int ds_update_dst(struct sip_msg *msg, int upos, int 
mode)
                return 1;
        }
        if(upos == DS_USE_NEXT) {
-               if(ds_load_replace(msg, &lxavp->val.v.s) < 0) {
-                       LM_ERR("cannot update load distribution\n");
-                       return -1;
+               ret = ds_load_replace(msg, &lxavp->val.v.s);
+               switch(ret) {
+                       case 0:
+                               break;
+                       case -2:
+                               LM_ERR("cannot update load with %.*s, skipping 
dst.\n", lxavp->val.v.s.len, lxavp->val.v.s.s);
+                               goto next_dst;
+                       default:
+                               LM_ERR("cannot update load distribution\n");
+                               return -1;
                }
        }
-
        return 1;
 }
 
@@ -2432,7 +2441,7 @@ int ds_add_dst(int group, str *address, int flags)
 
        _ds_list_nr = setn;
        *crt_idx = *next_idx;
-       ds_ht_clear_slots(_dsht_load);
+       
        ds_log_sets();
        return 0;
 
@@ -2487,7 +2496,7 @@ int ds_remove_dst(int group, str *address)
 
        _ds_list_nr = setn;
        *crt_idx = *next_idx;
-       ds_ht_clear_slots(_dsht_load);
+       
        ds_log_sets();
        return 0;
 


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