Module: kamailio
Branch: 4.4
Commit: a321025984d183f9c727fa4c9fcdc1e2e87010bf
URL: 
https://github.com/kamailio/kamailio/commit/a321025984d183f9c727fa4c9fcdc1e2e87010bf

Author: Richard Fuchs <rfu...@sipwise.com>
Committer: Richard Fuchs <rfu...@sipwise.com>
Date: 2017-02-07T08:55:52-05:00

rtpengine: fix segfault when enabling a proxy

---

Modified: modules/rtpengine/rtpengine.c

---

Diff:  
https://github.com/kamailio/kamailio/commit/a321025984d183f9c727fa4c9fcdc1e2e87010bf.diff
Patch: 
https://github.com/kamailio/kamailio/commit/a321025984d183f9c727fa4c9fcdc1e2e87010bf.patch

---

diff --git a/modules/rtpengine/rtpengine.c b/modules/rtpengine/rtpengine.c
index 6b46074..01f1606 100644
--- a/modules/rtpengine/rtpengine.c
+++ b/modules/rtpengine/rtpengine.c
@@ -194,7 +194,7 @@ static struct rtpp_node *select_rtpp_node_new(str, str, 
int, struct rtpp_node **
 static struct rtpp_node *select_rtpp_node_old(str, str, int, enum 
rtpe_operation);
 static struct rtpp_node *select_rtpp_node(str, str, int, struct rtpp_node **, 
int, enum rtpe_operation);
 static int is_queried_node(struct rtpp_node *, struct rtpp_node **, int);
-static int build_rtpp_socks(unsigned int current_rtpp_no);
+static int build_rtpp_socks();
 static char *send_rtpp_command(struct rtpp_node *, bencode_item_t *, int *);
 static int get_extra_id(struct sip_msg* msg, str *id_str);
 
@@ -1068,6 +1068,9 @@ static struct mi_root* mi_enable_rtp_proxy(struct mi_root 
*cmd_tree, void *param
        str rtpp_url;
        str snode, sattr, svalue;
 
+       if (build_rtpp_socks())
+               return init_mi_tree(400, MI_DB_ERR, MI_DB_ERR_LEN);
+
        found = MI_FOUND_NONE;
        found_rtpp_disabled = 0;
        found_rtpp = NULL;
@@ -1412,6 +1415,9 @@ static struct mi_root* mi_ping_rtp_proxy(struct mi_root* 
cmd_tree, void* param)
        str rtpp_url;
        str snode, sattr, svalue;
 
+       if (build_rtpp_socks())
+               return init_mi_tree(400, MI_DB_ERR, MI_DB_ERR_LEN);
+
        found = 0;
        found_rtpp_disabled = 0;
        found_rtpp = NULL;
@@ -1576,7 +1582,6 @@ static struct mi_root*
 mi_reload_rtp_proxy(struct mi_root* cmd_tree, void* param)
 {
        struct mi_root *root = NULL;
-       unsigned int current_rtpp_no;
 
        if (rtpp_db_url.s == NULL) {
                // no database
@@ -1594,13 +1599,7 @@ mi_reload_rtp_proxy(struct mi_root* cmd_tree, void* 
param)
                                return 0;
                        }
                } else {
-                       lock_get(rtpp_no_lock);
-                       current_rtpp_no = *rtpp_no;
-                       lock_release(rtpp_no_lock);
-
-                       if (rtpp_socks_size != current_rtpp_no) {
-                               build_rtpp_socks(current_rtpp_no);
-                       }
+                       build_rtpp_socks();
 
                        // success reloading from database
                        root = init_mi_tree(200, MI_DB_OK, MI_DB_OK_LEN);
@@ -1795,16 +1794,24 @@ mod_init(void)
        return 0;
 }
 
-static int build_rtpp_socks(unsigned int current_rtpp_no) {
+static int build_rtpp_socks() {
        int n, i;
        char *cp;
        struct addrinfo hints, *res;
        struct rtpp_set  *rtpp_list;
        struct rtpp_node *pnode;
+       unsigned int current_rtpp_no;
 #ifdef IP_MTU_DISCOVER
        int ip_mtu_discover = IP_PMTUDISC_DONT;
 #endif
 
+       lock_get(rtpp_no_lock);
+       current_rtpp_no = *rtpp_no;
+       lock_release(rtpp_no_lock);
+
+       if (current_rtpp_no == rtpp_socks_size)
+               return 0;
+
        // close current sockets
        for (i = 0; i < rtpp_socks_size; i++) {
                if (rtpp_socks[i] >= 0) {
@@ -1920,16 +1927,6 @@ child_init(int rank)
 
        mypid = getpid();
 
-       lock_get(rtpp_no_lock);
-       rtpp_socks_size = *rtpp_no;
-       lock_release(rtpp_no_lock);
-
-       rtpp_socks = (int*)pkg_malloc(sizeof(int)*(rtpp_socks_size));
-       if (!rtpp_socks) {
-               return -1;
-       }
-       memset(rtpp_socks, -1, sizeof(int)*(rtpp_socks_size));
-
        // vector of pointers to queried nodes
        queried_nodes_ptr = (struct rtpp_node**)pkg_malloc(queried_nodes_limit 
* sizeof(struct rtpp_node*));
        if (!queried_nodes_ptr) {
@@ -1939,9 +1936,8 @@ child_init(int rank)
        memset(queried_nodes_ptr, 0, queried_nodes_limit * sizeof(struct 
rtpp_node*));
 
        /* Iterate known RTP proxies - create sockets */
-       if (rtpp_socks_size) {
-               build_rtpp_socks(rtpp_socks_size);
-       }
+       if (build_rtpp_socks())
+               return -1;
 
        return 0;
 }
@@ -2844,15 +2840,8 @@ static struct rtpp_node *
 select_rtpp_node(str callid, str viabranch, int do_test, struct rtpp_node 
**queried_nodes_ptr, int queried_nodes, enum rtpe_operation op)
 {
        struct rtpp_node *node = NULL;
-       unsigned int current_rtpp_no;
 
-       lock_get(rtpp_no_lock);
-       current_rtpp_no = *rtpp_no;
-       lock_release(rtpp_no_lock);
-
-       if (rtpp_socks_size != current_rtpp_no) {
-               build_rtpp_socks(current_rtpp_no);
-       }
+       build_rtpp_socks();
 
        if (!active_rtpp_set) {
                default_rtpp_set = select_rtpp_set(setid_default);


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