/
imc.c
817 lines (699 loc) · 16.9 KB
/
imc.c
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/*
* imc module - instant messaging conferencing implementation
*
* Copyright (C) 2006 Voice Sistem S.R.L.
*
* 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
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include "../../lib/srdb1/db.h"
#include "../../lib/srdb1/db_res.h"
#include "../../core/sr_module.h"
#include "../../core/dprint.h"
#include "../../core/ut.h"
#include "../../core/timer.h"
#include "../../core/str.h"
#include "../../core/mem/shm_mem.h"
#include "../../lib/srdb1/db.h"
#include "../../core/parser/parse_from.h"
#include "../../core/parser/parse_content.h"
#include "../../core/parser/contact/parse_contact.h"
#include "../../core/resolve.h"
#include "../../core/hashes.h"
#include "../../core/rpc.h"
#include "../../core/rpc_lookup.h"
#include "../../modules/tm/tm_load.h"
#include "imc_mng.h"
#include "imc_cmd.h"
MODULE_VERSION
/** header variables */
str imc_hdr_ctype = str_init("Content-Type: text/plain\r\n");
char hdr_buf[1024];
str all_hdrs;
/** parameters */
db1_con_t *imc_db = NULL;
db_func_t imc_dbf;
static str db_url = str_init(DEFAULT_DB_URL);
str outbound_proxy = {NULL, 0};
static str rooms_table = str_init("imc_rooms");
static str members_table = str_init("imc_members");
static str imc_col_username = str_init("username");
static str imc_col_domain = str_init("domain");
static str imc_col_flag = str_init("flag");
static str imc_col_room = str_init("room");
static str imc_col_name = str_init("name");
imc_hentry_p _imc_htable = NULL;
int imc_hash_size = 4;
str imc_cmd_start_str = str_init(IMC_CMD_START_STR);
char imc_cmd_start_char;
str extra_hdrs = {NULL, 0};
/** module functions */
static int mod_init(void);
static int child_init(int);
static int imc_manager(struct sip_msg*, char *, char *);
static int imc_rpc_init(void);
static void destroy(void);
/** TM bind */
struct tm_binds tmb;
/** TM callback function */
void inv_callback( struct cell *t, int type, struct tmcb_params *ps);
static cmd_export_t cmds[]={
{"imc_manager", (cmd_function)imc_manager, 0, 0, 0, REQUEST_ROUTE},
{0,0,0,0,0,0}
};
static param_export_t params[]={
{"db_url", PARAM_STR, &db_url},
{"hash_size", INT_PARAM, &imc_hash_size},
{"imc_cmd_start_char", PARAM_STR, &imc_cmd_start_str},
{"rooms_table", PARAM_STR, &rooms_table},
{"members_table", PARAM_STR, &members_table},
{"outbound_proxy", PARAM_STR, &outbound_proxy},
{"extra_hdrs", PARAM_STR, &extra_hdrs},
{0,0,0}
};
#ifdef STATISTICS
#include "../../core/counters.h"
stat_var* imc_active_rooms;
stat_export_t imc_stats[] = {
{"active_rooms" , 0, &imc_active_rooms },
{0,0,0}
};
#endif
/** module exports */
struct module_exports exports= {
"imc", /* module name */
DEFAULT_DLFLAGS, /* dlopen flags */
cmds, /* exported commands */
params, /* exported parameters */
#ifdef STATISTICS
imc_stats,
#else
0, /* exported statistics */
#endif
0, /* exported MI functions */
0, /* exported pseudo-variables */
0, /* extra processes */
mod_init, /* mod init */
0, /* response handler */
(destroy_function) destroy, /* destroy function */
child_init /* child init */
};
/**
* the initiating function
*/
int add_from_db(void)
{
imc_member_p member = NULL;
int i, j, flag;
db_key_t mq_result_cols[4], mquery_cols[2];
db_key_t rq_result_cols[4];
db_val_t mquery_vals[2];
db1_res_t *r_res= NULL;
db1_res_t *m_res= NULL;
db_row_t *m_row = NULL, *r_row = NULL;
db_val_t *m_row_vals, *r_row_vals = NULL;
str name, domain;
imc_room_p room = NULL;
int er_ret = -1;
rq_result_cols[0] = &imc_col_name;
rq_result_cols[1] = &imc_col_domain;
rq_result_cols[2] = &imc_col_flag;
mq_result_cols[0] = &imc_col_username;
mq_result_cols[1] = &imc_col_domain;
mq_result_cols[2] = &imc_col_flag;
mquery_cols[0] = &imc_col_room;
mquery_vals[0].type = DB1_STR;
mquery_vals[0].nul = 0;
if(imc_dbf.use_table(imc_db, &rooms_table)< 0)
{
LM_ERR("use_table failed\n");
return -1;
}
if(imc_dbf.query(imc_db,0, 0, 0, rq_result_cols,0, 3, 0,&r_res)< 0)
{
LM_ERR("failed to querry table\n");
return -1;
}
if(r_res==NULL || r_res->n<=0)
{
LM_INFO("the query returned no result\n");
if(r_res) imc_dbf.free_result(imc_db, r_res);
r_res = NULL;
return 0;
}
LM_DBG("found %d rooms\n", r_res->n);
for(i =0 ; i< r_res->n ; i++)
{
/*add rooms*/
r_row = &r_res->rows[i];
r_row_vals = ROW_VALUES(r_row);
name.s = r_row_vals[0].val.str_val.s;
name.len = strlen(name.s);
domain.s = r_row_vals[1].val.str_val.s;
domain.len = strlen(domain.s);
flag = r_row_vals[2].val.int_val;
room = imc_add_room(&name, &domain, flag);
if(room == NULL)
{
LM_ERR("failed to add room\n ");
goto error;
}
/* add members */
if(imc_dbf.use_table(imc_db, &members_table)< 0)
{
LM_ERR("use_table failed\n ");
goto error;
}
mquery_vals[0].val.str_val= room->uri;
if(imc_dbf.query(imc_db, mquery_cols, 0, mquery_vals, mq_result_cols,
1, 3, 0, &m_res)< 0)
{
LM_ERR("failed to querry table\n");
goto error;
}
if(m_res && m_res->n <=0)
{
LM_INFO("the query returned no result\n");
er_ret = 0;
goto error; /* each room must have at least one member*/
}
for(j =0; j< m_res->n; j++)
{
m_row = &m_res->rows[j];
m_row_vals = ROW_VALUES(m_row);
name.s = m_row_vals[0].val.str_val.s;
name.len = strlen(name.s);
domain.s = m_row_vals[1].val.str_val.s;
domain.len = strlen(domain.s);
flag = m_row_vals[2].val.int_val;
LM_DBG("adding memeber: [name]=%.*s [domain]=%.*s"
" in [room]= %.*s\n",name.len, name.s, domain.len,domain.s,
room->uri.len, room->uri.s);
member = imc_add_member(room, &name, &domain, flag);
if(member == NULL)
{
LM_ERR("failed to adding member\n ");
goto error;
}
imc_release_room(room);
}
if(m_res)
{
imc_dbf.free_result(imc_db, m_res);
m_res = NULL;
}
}
if(imc_dbf.use_table(imc_db, &members_table)< 0)
{
LM_ERR("use table failed\n ");
goto error;
}
if(imc_dbf.delete(imc_db, 0, 0 , 0, 0) < 0)
{
LM_ERR("failed to delete information from db\n");
goto error;
}
if(imc_dbf.use_table(imc_db, &rooms_table)< 0)
{
LM_ERR("use table failed\n ");
goto error;
}
if(imc_dbf.delete(imc_db, 0, 0 , 0, 0) < 0)
{
LM_ERR("failed to delete information from db\n");
goto error;
}
if(r_res)
{
imc_dbf.free_result(imc_db, r_res);
r_res = NULL;
}
return 0;
error:
if(r_res)
{
imc_dbf.free_result(imc_db, r_res);
r_res = NULL;
}
if(m_res)
{
imc_dbf.free_result(imc_db, m_res);
m_res = NULL;
}
if(room)
imc_release_room(room);
return er_ret;
}
static int mod_init(void)
{
#ifdef STATISTICS
/* register statistics */
if (register_module_stats( exports.name, imc_stats)!=0 ) {
LM_ERR("failed to register core statistics\n");
return -1;
}
#endif
if(imc_rpc_init()<0)
{
LM_ERR("failed to register RPC commands\n");
return -1;
}
if(imc_hash_size <= 0)
{
LM_ERR("invalid hash size\n");
return -1;
}
imc_hash_size = 1 << imc_hash_size;
if(imc_htable_init() < 0)
{
LM_ERR("initializing hash table\n");
return -1;
}
if (extra_hdrs.s) {
if (extra_hdrs.len + imc_hdr_ctype.len > 1024) {
LM_ERR("extra_hdrs too long\n");
return -1;
}
all_hdrs.s = &(hdr_buf[0]);
memcpy(all_hdrs.s, imc_hdr_ctype.s, imc_hdr_ctype.len);
memcpy(all_hdrs.s + imc_hdr_ctype.len, extra_hdrs.s,
extra_hdrs.len);
all_hdrs.len = extra_hdrs.len + imc_hdr_ctype.len;
} else {
all_hdrs = imc_hdr_ctype;
}
/* binding to mysql module */
LM_DBG("db_url=%s/%d/%p\n", ZSW(db_url.s), db_url.len, db_url.s);
if (db_bind_mod(&db_url, &imc_dbf))
{
LM_DBG("database module not found\n");
return -1;
}
imc_db = imc_dbf.init(&db_url);
if (!imc_db)
{
LM_ERR("failed to connect to the database\n");
return -1;
}
/* read the informations stored in db */
if(add_from_db() <0)
{
LM_ERR("failed to get information from db\n");
return -1;
}
/* load TM API */
if (load_tm_api(&tmb)!=0) {
LM_ERR("unable to load tm api\n");
return -1;
}
imc_cmd_start_char = imc_cmd_start_str.s[0];
if(imc_db)
imc_dbf.close(imc_db);
imc_db = NULL;
return 0;
}
/**
* child init
*/
static int child_init(int rank)
{
if (rank==PROC_INIT || rank==PROC_TCP_MAIN)
return 0; /* do nothing for the main process */
if (imc_dbf.init==0)
{
LM_ERR("database not bound\n");
return -1;
}
imc_db = imc_dbf.init(&db_url);
if (!imc_db)
{
LM_ERR("child %d: Error while connecting database\n", rank);
return -1;
}
else
{
if (imc_dbf.use_table(imc_db, &rooms_table) < 0)
{
LM_ERR("child %d: Error in use_table '%.*s'\n", rank, rooms_table.len, rooms_table.s);
return -1;
}
if (imc_dbf.use_table(imc_db, &members_table) < 0)
{
LM_ERR("child %d: Error in use_table '%.*s'\n", rank, members_table.len, members_table.s);
return -1;
}
LM_DBG("child %d: Database connection opened successfully\n", rank);
}
return 0;
}
static int imc_manager(struct sip_msg* msg, char *str1, char *str2)
{
imc_cmd_t cmd;
str body;
struct sip_uri from_uri, *pto_uri=NULL, *pfrom_uri=NULL;
struct to_body *pfrom;
int ret = -1;
body.s = get_body( msg );
if (body.s==0)
{
LM_ERR("cannot extract body from msg\n");
goto error;
}
/* lungimea corpului mesajului */
if (!msg->content_length)
{
LM_ERR("no Content-Length\n");
goto error;
}
body.len = get_content_length( msg );
if(body.len <= 0)
{
LM_DBG("empty body!\n");
goto error;
}
if(parse_sip_msg_uri(msg)<0)
{
LM_ERR("failed to parse r-uri\n");
goto error;
}
pto_uri=&msg->parsed_uri;
if(parse_from_header(msg)<0)
{
LM_ERR("failed to parse From header\n");
goto error;
}
pfrom = (struct to_body*)msg->from->parsed;
if(parse_uri(pfrom->uri.s, pfrom->uri.len, &from_uri)<0){
LM_ERR("failed to parse From URI\n");
goto error;
}
pfrom_uri=&from_uri;
if(body.s[0]== imc_cmd_start_char)
{
LM_DBG("found command\n");
if(imc_parse_cmd(body.s, body.len, &cmd)<0)
{
LM_ERR("failed to parse imc cmd!\n");
ret = -20;
goto error;
}
switch(cmd.type)
{
case IMC_CMDID_CREATE:
if(imc_handle_create(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'create'\n");
ret = -30;
goto error;
}
break;
case IMC_CMDID_JOIN:
if(imc_handle_join(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'join'\n");
ret = -40;
goto error;
}
break;
case IMC_CMDID_INVITE:
if(imc_handle_invite(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'invite'\n");
ret = -50;
goto error;
}
break;
case IMC_CMDID_ACCEPT:
if(imc_handle_accept(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'accept'\n");
ret = -60;
goto error;
}
break;
case IMC_CMDID_DENY:
if(imc_handle_deny(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'deny'\n");
ret = -70;
goto error;
}
break;
case IMC_CMDID_REMOVE:
if(imc_handle_remove(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'remove'\n");
ret = -80;
goto error;
}
break;
case IMC_CMDID_EXIT:
if(imc_handle_exit(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'exit'\n");
ret = -90;
goto error;
}
break;
case IMC_CMDID_LIST:
if(imc_handle_list(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'list'\n");
ret = -100;
goto error;
}
break;
case IMC_CMDID_DESTROY:
if(imc_handle_destroy(msg, &cmd, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'destroy'\n");
ret = -110;
goto error;
}
break;
case IMC_CMDID_HELP:
if(imc_handle_help(msg, &cmd, &pfrom->uri,
(msg->new_uri.s)?&msg->new_uri:&msg->first_line.u.request.uri)<0)
{
LM_ERR("failed to handle 'help'\n");
ret = -120;
goto error;
}
break;
default:
if(imc_handle_unknown(msg, &cmd, &pfrom->uri,
(msg->new_uri.s)?&msg->new_uri:&msg->first_line.u.request.uri)<0)
{
LM_ERR("failed to handle 'unknown'\n");
ret = -130;
goto error;
}
}
goto done;
}
if(imc_handle_message(msg, &body, pfrom_uri, pto_uri)<0)
{
LM_ERR("failed to handle 'message'\n");
ret = -200;
goto error;
}
done:
return 1;
error:
return ret;
}
/**
* destroy module
*/
static void destroy(void)
{
imc_room_p irp = NULL;
imc_member_p member = NULL;
int i;
db_key_t mq_cols[4];
db_val_t mq_vals[4];
db_key_t rq_cols[4];
db_val_t rq_vals[4];
if(imc_db==NULL)
goto done;
mq_cols[0] = &imc_col_username;
mq_vals[0].type = DB1_STR;
mq_vals[0].nul = 0;
mq_cols[1] = &imc_col_domain;
mq_vals[1].type = DB1_STR;
mq_vals[1].nul = 0;
mq_cols[2] = &imc_col_flag;
mq_vals[2].type = DB1_INT;
mq_vals[2].nul = 0;
mq_cols[3] = &imc_col_room;
mq_vals[3].type = DB1_STR;
mq_vals[3].nul = 0;
rq_cols[0] = &imc_col_name;
rq_vals[0].type = DB1_STR;
rq_vals[0].nul = 0;
rq_cols[1] = &imc_col_domain;
rq_vals[1].type = DB1_STR;
rq_vals[1].nul = 0;
rq_cols[2] = &imc_col_flag;
rq_vals[2].type = DB1_INT;
rq_vals[2].nul = 0;
for(i=0; i<imc_hash_size; i++)
{
irp = _imc_htable[i].rooms;
while(irp)
{
rq_vals[0].val.str_val = irp->name;
rq_vals[1].val.str_val = irp->domain;
rq_vals[2].val.int_val = irp->flags;
if(imc_dbf.use_table(imc_db, &rooms_table)< 0)
{
LM_ERR("use_table failed\n");
return;
}
if(imc_dbf.insert(imc_db, rq_cols, rq_vals, 3)<0)
{
LM_ERR("failed to insert into table imc_rooms\n");
return;
}
LM_DBG("room %d %.*s\n", i, irp->name.len, irp->name.s);
member = irp->members;
while(member)
{
mq_vals[0].val.str_val = member->user;
mq_vals[1].val.str_val = member->domain;
mq_vals[2].val.int_val = member->flags;
mq_vals[3].val.str_val = irp->uri;
if(imc_dbf.use_table(imc_db, &members_table)< 0)
{
LM_ERR("use_table failed\n");
return;
}
if(imc_dbf.insert(imc_db, mq_cols, mq_vals, 4)<0)
{
LM_ERR("failed to insert into table imc_rooms\n");
return;
}
member = member->next;
}
irp = irp->next;
}
}
done:
imc_htable_destroy();
}
/************************* RPC ***********************/
static void imc_rpc_list_rooms(rpc_t* rpc, void* ctx)
{
int i;
imc_room_p irp = NULL;
void *vh;
for(i=0; i<imc_hash_size; i++)
{
lock_get(&_imc_htable[i].lock);
irp = _imc_htable[i].rooms;
while(irp){
if (rpc->add(ctx, "{", &vh) < 0) {
lock_release(&_imc_htable[i].lock);
rpc->fault(ctx, 500, "Server error");
return;
}
rpc->struct_add(vh, "SdS",
"room", &irp->uri,
"members", irp->nr_of_members,
"owner", &irp->members->uri);
irp = irp->next;
}
lock_release(&_imc_htable[i].lock);
}
}
static void imc_rpc_list_members(rpc_t* rpc, void* ctx)
{
imc_room_p room = NULL;
void *vh;
void *ih;
struct sip_uri inv_uri, *pinv_uri;
imc_member_p imp=NULL;
str room_name;
if (rpc->scan(ctx, "S", &room_name) < 1) {
rpc->fault(ctx, 500, "No room name");
return;
}
if(room_name.s == NULL || room_name.len == 0
|| *room_name.s=='\0' || *room_name.s=='.') {
LM_ERR("empty room name!\n");
rpc->fault(ctx, 500, "Empty room name");
return;
}
/* find room */
if(parse_uri(room_name.s,room_name.len, &inv_uri)<0) {
LM_ERR("invalid room name!\n");
rpc->fault(ctx, 500, "Invalid room name");
return;
}
pinv_uri=&inv_uri;
room=imc_get_room(&pinv_uri->user, &pinv_uri->host);
if(room==NULL) {
LM_ERR("no such room!\n");
rpc->fault(ctx, 500, "Room not found");
return;
}
if (rpc->add(ctx, "{", &vh) < 0) {
imc_release_room(room);
rpc->fault(ctx, 500, "Server error");
return;
}
rpc->struct_add(vh, "S[d",
"room", &room->uri,
"members", &ih,
"count", room->nr_of_members);
imp = room->members;
while(imp) {
rpc->array_add(ih, "S", &imp->uri);
imp = imp->next;
}
imc_release_room(room);
}
static const char* imc_rpc_list_rooms_doc[2] = {
"List imc rooms.",
0
};
static const char* imc_rpc_list_members_doc[2] = {
"List members in an imc room.",
0
};
rpc_export_t imc_rpc[] = {
{"imc.list_rooms", imc_rpc_list_rooms, imc_rpc_list_rooms_doc, RET_ARRAY},
{"imc.list_members", imc_rpc_list_members, imc_rpc_list_members_doc, 0},
{0, 0, 0, 0}
};
static int imc_rpc_init(void)
{
if (rpc_register_array(imc_rpc)!=0)
{
LM_ERR("failed to register RPC commands\n");
return -1;
}
return 0;
}