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usrloc_sync.c
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usrloc_sync.c
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/*
* Copyright (C) 2014 Andrey Rybkin <rybkin.a@bks.tv>
*
* This file is part of Kamailio, a free SIP server.
*
* This file 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
*
*
* This file 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
*
*/
#include "usrloc_sync.h"
#include "../usrloc/usrloc.h"
#include "../usrloc/ul_callback.h"
#include "../usrloc/dlist.h"
#include "../../dprint.h"
#include "../../parser/parse_from.h"
#include "../../parser/parse_addr_spec.h"
static str usrloc_dmq_content_type = str_init("application/json");
static str dmq_200_rpl = str_init("OK");
static str dmq_400_rpl = str_init("Bad Request");
static str dmq_500_rpl = str_init("Server Internal Error");
dmq_api_t usrloc_dmqb;
dmq_peer_t* usrloc_dmq_peer = NULL;
dmq_resp_cback_t usrloc_dmq_resp_callback = {&usrloc_dmq_resp_callback_f, 0};
int usrloc_dmq_send_all();
int usrloc_dmq_request_sync();
int usrloc_dmq_send_contact(ucontact_t* ptr, str aor, int action, dmq_node_t* node);
usrloc_api_t ul;
#define MAX_AOR_LEN 256
int extract_aor(str* _uri, str* _a, sip_uri_t *_pu)
{
static char aor_buf[MAX_AOR_LEN];
sip_uri_t turi;
sip_uri_t *puri;
str *uri;
memset(aor_buf, 0, MAX_AOR_LEN);
uri=_uri;
if(_pu!=NULL)
puri = _pu;
else
puri = &turi;
if (parse_uri(uri->s, uri->len, puri) < 0) {
LM_ERR("failed to parse AoR [%.*s]\n", uri->len, uri->s);
return -1;
}
if ( (puri->user.len + puri->host.len + 1) > MAX_AOR_LEN) {
LM_ERR("Address Of Record too long\n");
return -2;
}
_a->s = aor_buf;
_a->len = puri->user.len;
if (un_escape(&puri->user, _a) < 0) {
LM_ERR("failed to unescape username\n");
return -3;
}
strlower(_a);
return 0;
}
int add_contact(str aor, ucontact_info_t* ci)
{
urecord_t* r;
udomain_t* _d;
ucontact_t* c;
str contact;
int res;
ul.get_udomain("location", &_d);
ul.lock_udomain(_d, &aor);
res = ul.get_urecord(_d, &aor, &r);
if (res < 0) {
LM_ERR("failed to retrieve record from usrloc\n");
goto error;
} else if ( res == 0) {
LM_DBG("'%.*s' found in usrloc\n", aor.len, ZSW(aor.s));
res = ul.get_ucontact_by_instance(r, &aor, ci, &c);
LM_DBG("get_ucontact_by_instance = %d\n", res);
if (res==-1) {
LM_ERR("Invalid cseq\n");
goto error;
} else if (res > 0 ) {
LM_DBG("Not found contact\n");
ul.insert_ucontact(r, &contact, ci, &c);
} else if (res == 0) {
LM_DBG("Found contact\n");
ul.update_ucontact(r, c, ci);
}
} else {
LM_DBG("'%.*s' Not found in usrloc\n", aor.len, ZSW(aor.s));
ul.insert_urecord(_d, &aor, &r);
LM_DBG("Insert record\n");
contact.s = ci->c->s;
contact.len = ci->c->len;
ul.insert_ucontact(r, &contact, ci, &c);
LM_DBG("Insert ucontact\n");
}
LM_DBG("Release record\n");
ul.release_urecord(r);
LM_DBG("Unlock udomain\n");
ul.unlock_udomain(_d, &aor);
return 0;
error:
ul.unlock_udomain(_d, &aor);
return -1;
}
void usrloc_get_all_ucontact(dmq_node_t* node)
{
int rval, len=0;
void *buf, *cp;
str c;
str path;
str ruid;
unsigned int aorhash;
struct socket_info* send_sock;
unsigned int flags;
len = 0;
buf = NULL;
if (ul.get_all_ucontacts == NULL){
LM_ERR("ul.get_all_ucontacts is NULL\n");
goto done;
}
rval = ul.get_all_ucontacts(buf, len, 0, 0, 1);
if (rval<0) {
LM_ERR("failed to fetch contacts\n");
goto done;
}
if (rval > 0) {
if (buf != NULL)
pkg_free(buf);
len = rval * 2;
buf = pkg_malloc(len);
if (buf == NULL) {
LM_ERR("out of pkg memory\n");
goto done;
}
rval = ul.get_all_ucontacts(buf, len, 0, 0, 1);
if (rval != 0) {
pkg_free(buf);
goto done;
}
}
if (buf == NULL)
goto done;
cp = buf;
while (1) {
memcpy(&(c.len), cp, sizeof(c.len));
if (c.len == 0)
break;
c.s = (char*)cp + sizeof(c.len);
cp = (char*)cp + sizeof(c.len) + c.len;
memcpy( &send_sock, cp, sizeof(send_sock));
cp = (char*)cp + sizeof(send_sock);
memcpy( &flags, cp, sizeof(flags));
cp = (char*)cp + sizeof(flags);
memcpy( &(path.len), cp, sizeof(path.len));
path.s = path.len ? ((char*)cp + sizeof(path.len)) : NULL ;
cp = (char*)cp + sizeof(path.len) + path.len;
memcpy( &(ruid.len), cp, sizeof(ruid.len));
ruid.s = ruid.len ? ((char*)cp + sizeof(ruid.len)) : NULL ;
cp = (char*)cp + sizeof(ruid.len) + ruid.len;
memcpy( &aorhash, cp, sizeof(aorhash));
cp = (char*)cp + sizeof(aorhash);
str aor;
sip_uri_t puri;
urecord_t* r;
udomain_t* _d;
ucontact_t* ptr = 0;
int res;
if (extract_aor(&c, &aor, &puri) < 0) {
LM_ERR("failed to extract address of record\n");
continue;
}
ul.get_udomain("location", &_d);
res = ul.get_urecord_by_ruid(_d, aorhash, &ruid, &r, &ptr);
aor = r->aor;
if (res > 0) {
LM_DBG("'%.*s' Not found in usrloc\n", aor.len, ZSW(aor.s));
ul.release_urecord(r);
ul.unlock_udomain(_d, &aor);
continue;
}
LM_DBG("- AoR: %.*s AoRhash=%d Flags=%d\n", aor.len, aor.s, aorhash, flags);
while (ptr) {
usrloc_dmq_send_contact(ptr, aor, DMQ_UPDATE, node);
ptr = ptr->next;
}
ul.release_urecord(r);
ul.unlock_udomain(_d, &aor);
}
pkg_free(buf);
done:
c.s = ""; c.len = 0;
}
int usrloc_dmq_initialize()
{
dmq_peer_t not_peer;
/* load the DMQ API */
if (dmq_load_api(&usrloc_dmqb)!=0) {
LM_ERR("cannot load dmq api\n");
return -1;
} else {
LM_DBG("loaded dmq api\n");
}
not_peer.callback = usrloc_dmq_handle_msg;
not_peer.init_callback = usrloc_dmq_request_sync;
not_peer.description.s = "usrloc";
not_peer.description.len = 6;
not_peer.peer_id.s = "usrloc";
not_peer.peer_id.len = 6;
usrloc_dmq_peer = usrloc_dmqb.register_dmq_peer(¬_peer);
if(!usrloc_dmq_peer) {
LM_ERR("error in register_dmq_peer\n");
goto error;
} else {
LM_DBG("dmq peer registered\n");
}
return 0;
error:
return -1;
}
int usrloc_dmq_send(str* body, dmq_node_t* node) {
if (!usrloc_dmq_peer) {
LM_ERR("dlg_dmq_peer is null!\n");
return -1;
}
if (node) {
LM_DBG("sending dmq message ...\n");
usrloc_dmqb.send_message(usrloc_dmq_peer, body, node, &usrloc_dmq_resp_callback, 1, &usrloc_dmq_content_type);
} else {
LM_DBG("sending dmq broadcast...\n");
usrloc_dmqb.bcast_message(usrloc_dmq_peer, body, 0, &usrloc_dmq_resp_callback, 1, &usrloc_dmq_content_type);
}
return 0;
}
/**
* @brief ht dmq callback
*/
int usrloc_dmq_handle_msg(struct sip_msg* msg, peer_reponse_t* resp, dmq_node_t* node)
{
int content_length;
str body;
srjson_doc_t jdoc;
srjson_t *it = NULL;
static ucontact_info_t ci;
int action, expires, cseq, flags, cflags, q, last_modified, methods, reg_id;
str aor, ruid, c, received, path, callid, user_agent, instance;
parse_from_header(msg);
body = ((struct to_body*)msg->from->parsed)->uri;
LM_DBG("dmq message received from %.*s\n", body.len, body.s);
if(!msg->content_length) {
LM_ERR("no content length header found\n");
goto invalid;
}
content_length = get_content_length(msg);
if(!content_length) {
LM_DBG("content length is 0\n");
goto invalid;
}
body.s = get_body(msg);
body.len = content_length;
if (!body.s) {
LM_ERR("unable to get body\n");
goto error;
}
srjson_InitDoc(&jdoc, NULL);
jdoc.buf = body;
if(jdoc.root == NULL) {
jdoc.root = srjson_Parse(&jdoc, jdoc.buf.s);
if(jdoc.root == NULL)
{
LM_ERR("invalid json doc [[%s]]\n", jdoc.buf.s);
goto invalid;
}
}
for(it=jdoc.root->child; it; it = it->next)
{
if (it->string == NULL) continue;
if (strcmp(it->string, "action")==0) {
action = it->valueint;
} else if (strcmp(it->string, "aor")==0) {
aor.s = it->valuestring;
aor.len = strlen(aor.s);
} else if (strcmp(it->string, "ruid")==0) {
ruid.s = it->valuestring;
ruid.len = strlen(ruid.s);
} else if (strcmp(it->string, "c")==0) {
c.s = it->valuestring;
c.len = strlen(c.s);
} else if (strcmp(it->string, "received")==0) {
received.s = it->valuestring;
received.len = strlen(received.s);
} else if (strcmp(it->string, "path")==0) {
path.s = it->valuestring;
path.len = strlen(path.s);
} else if (strcmp(it->string, "callid")==0) {
callid.s = it->valuestring;
callid.len = strlen(callid.s);
} else if (strcmp(it->string, "user_agent")==0) {
user_agent.s = it->valuestring;
user_agent.len = strlen(user_agent.s);
} else if (strcmp(it->string, "instance")==0) {
instance.s = it->valuestring;
instance.len = strlen(instance.s);
} else if (strcmp(it->string, "expires")==0) { //
expires = it->valueint;
} else if (strcmp(it->string, "cseq")==0) {
cseq = it->valueint;
} else if (strcmp(it->string, "flags")==0) {
flags = it->valueint;
} else if (strcmp(it->string, "cflags")==0) {
cflags = it->valueint;
} else if (strcmp(it->string, "q")==0) {
q = it->valueint;
} else if (strcmp(it->string, "last_modified")==0) {
last_modified = it->valueint;
} else if (strcmp(it->string, "methods")==0) {
methods = it->valueint;
} else if (strcmp(it->string, "reg_id")==0) {
reg_id = it->valueint;
} else {
LM_ERR("unrecognized field in json object\n");
}
}
srjson_DestroyDoc(&jdoc);
memset( &ci, 0, sizeof(ucontact_info_t));
ci.ruid = ruid;
ci.c = &c;
ci.received = received;
ci.path = &path;
ci.expires = expires;
ci.q = q;
ci.callid = &callid;
ci.cseq = cseq;
ci.flags = flags;
ci.flags |= usrloc_dmq_flag;
ci.cflags = cflags;
ci.user_agent = &user_agent;
ci.methods = methods;
ci.instance = instance;
ci.reg_id = reg_id;
ci.tcpconn_id = -1;
ci.last_modified = last_modified;
switch(action) {
case DMQ_UPDATE:
LM_DBG("Received DMQ_UPDATE. Update contact info...\n");
add_contact(aor, &ci);
break;
case DMQ_RM:
LM_DBG("Received DMQ_RM. Delete contact info...\n");
break;
case DMQ_SYNC:
LM_DBG("Received DMQ_SYNC. Sending all contacts...\n");
usrloc_get_all_ucontact(node);
break;
case DMQ_NONE:
LM_DBG("Received DMQ_NONE. Not used...\n");
break;
default: goto invalid;
}
resp->reason = dmq_200_rpl;
resp->resp_code = 200;
return 0;
invalid:
resp->reason = dmq_400_rpl;
resp->resp_code = 400;
return 0;
error:
resp->reason = dmq_500_rpl;
resp->resp_code = 500;
return 0;
}
int usrloc_dmq_request_sync() {
srjson_doc_t jdoc;
LM_DBG("requesting sync from dmq peers\n");
srjson_InitDoc(&jdoc, NULL);
jdoc.root = srjson_CreateObject(&jdoc);
if(jdoc.root==NULL) {
LM_ERR("cannot create json root\n");
goto error;
}
srjson_AddNumberToObject(&jdoc, jdoc.root, "action", DMQ_SYNC);
jdoc.buf.s = srjson_PrintUnformatted(&jdoc, jdoc.root);
if(jdoc.buf.s==NULL) {
LM_ERR("unable to serialize data\n");
goto error;
}
jdoc.buf.len = strlen(jdoc.buf.s);
LM_DBG("sending serialized data %.*s\n", jdoc.buf.len, jdoc.buf.s);
if (usrloc_dmq_send(&jdoc.buf, 0)!=0) {
goto error;
}
jdoc.free_fn(jdoc.buf.s);
jdoc.buf.s = NULL;
srjson_DestroyDoc(&jdoc);
return 0;
error:
if(jdoc.buf.s!=NULL) {
jdoc.free_fn(jdoc.buf.s);
jdoc.buf.s = NULL;
}
srjson_DestroyDoc(&jdoc);
return -1;
}
int usrloc_dmq_send_contact(ucontact_t* ptr, str aor, int action, dmq_node_t* node) {
srjson_doc_t jdoc;
srjson_InitDoc(&jdoc, NULL);
int flags;
jdoc.root = srjson_CreateObject(&jdoc);
if(jdoc.root==NULL) {
LM_ERR("cannot create json root\n");
goto error;
}
flags = ptr->flags;
flags &= ~usrloc_dmq_flag;
srjson_AddNumberToObject(&jdoc, jdoc.root, "action", action);
srjson_AddStrToObject(&jdoc, jdoc.root, "aor", aor.s, aor.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "ruid", ptr->ruid.s, ptr->ruid.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "c", ptr->c.s, ptr->c.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "received", ptr->received.s, ptr->received.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "path", ptr->path.s, ptr->path.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "callid", ptr->callid.s, ptr->callid.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "user_agent", ptr->user_agent.s, ptr->user_agent.len);
srjson_AddStrToObject(&jdoc, jdoc.root, "instance", ptr->instance.s, ptr->instance.len);
srjson_AddNumberToObject(&jdoc, jdoc.root, "expires", ptr->expires);
srjson_AddNumberToObject(&jdoc, jdoc.root, "cseq", ptr->cseq);
srjson_AddNumberToObject(&jdoc, jdoc.root, "flags", flags);
srjson_AddNumberToObject(&jdoc, jdoc.root, "cflags", ptr->cflags);
srjson_AddNumberToObject(&jdoc, jdoc.root, "q", ptr->q);
srjson_AddNumberToObject(&jdoc, jdoc.root, "last_modified", ptr->last_modified);
srjson_AddNumberToObject(&jdoc, jdoc.root, "methods", ptr->methods);
srjson_AddNumberToObject(&jdoc, jdoc.root, "reg_id", ptr->reg_id);
jdoc.buf.s = srjson_PrintUnformatted(&jdoc, jdoc.root);
if(jdoc.buf.s==NULL) {
LM_ERR("unable to serialize data\n");
goto error;
}
jdoc.buf.len = strlen(jdoc.buf.s);
LM_DBG("sending serialized data %.*s\n", jdoc.buf.len, jdoc.buf.s);
if (usrloc_dmq_send(&jdoc.buf, node)!=0) {
goto error;
}
jdoc.free_fn(jdoc.buf.s);
jdoc.buf.s = NULL;
srjson_DestroyDoc(&jdoc);
return 0;
error:
if(jdoc.buf.s!=NULL) {
jdoc.free_fn(jdoc.buf.s);
jdoc.buf.s = NULL;
}
srjson_DestroyDoc(&jdoc);
return -1;
}
int usrloc_dmq_resp_callback_f(struct sip_msg* msg, int code,
dmq_node_t* node, void* param)
{
LM_DBG("dmq response callback triggered [%p %d %p]\n", msg, code, param);
return 0;
}
void ul_cb_contact(ucontact_t* ptr, int type, void* param)
{
str aor;
LM_DBG("Callback from usrloc with type=%d\n", type);
aor.s = ptr->aor->s;
aor.len = ptr->aor->len;
if (!(ptr->flags & usrloc_dmq_flag)) {
switch(type){
case UL_CONTACT_INSERT:
usrloc_dmq_send_contact(ptr, aor, DMQ_UPDATE, 0);
break;
case UL_CONTACT_UPDATE:
usrloc_dmq_send_contact(ptr, aor, DMQ_UPDATE, 0);
break;
case UL_CONTACT_DELETE:
//usrloc_dmq_send_contact(ptr, aor, DMQ_RM);
LM_DBG("Contact <%.*s> deleted\n", aor.len, aor.s);
break;
case UL_CONTACT_EXPIRE:
//usrloc_dmq_send_contact(ptr, aor, DMQ_UPDATE);
LM_DBG("Contact <%.*s> expired\n", aor.len, aor.s);
break;
}
} else {
LM_DBG("Contact recieved from DMQ... skip\n");
}
}