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431 lines
10 KiB
431 lines
10 KiB
/*
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* xcap_client module - XCAP client for Kamailio
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*
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* Copyright (C) 2007 Voice Sistem S.R.L.
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <curl/curl.h>
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#include "../../pt.h"
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#include "../../lib/srdb1/db.h"
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#include "../../sr_module.h"
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#include "../../dprint.h"
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#include "../../error.h"
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#include "../../ut.h"
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#include "../../mem/mem.h"
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#include "../../mem/shm_mem.h"
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#include "../../lib/kmi/mi.h"
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#include "../presence/utils_func.h"
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#include "xcap_functions.h"
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#include "xcap_client.h"
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MODULE_VERSION
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#define XCAP_TABLE_VERSION 4
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static int mod_init(void);
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static int child_init(int rank);
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static void destroy(void);
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struct mi_root* refreshXcapDoc(struct mi_root* cmd, void* param);
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int get_auid_flag(str auid);
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str xcap_db_table = str_init("xcap");
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str xcap_db_url = str_init(DEFAULT_DB_URL);
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xcap_callback_t* xcapcb_list= NULL;
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int periodical_query= 1;
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unsigned int query_period= 100;
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str str_source_col = str_init("source");
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str str_path_col = str_init("path");
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str str_doc_col = str_init("doc");
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str str_etag_col = str_init("etag");
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str str_username_col = str_init("username");
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str str_domain_col = str_init("domain");
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str str_doc_type_col = str_init("doc_type");
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str str_doc_uri_col = str_init("doc_uri");
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str str_port_col = str_init("port");
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/* database connection */
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db1_con_t *xcap_db = NULL;
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db_func_t xcap_dbf;
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void query_xcap_update(unsigned int ticks, void* param);
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static param_export_t params[]={
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{ "db_url", PARAM_STR, &xcap_db_url },
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{ "xcap_table", PARAM_STR, &xcap_db_table },
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{ "periodical_query", INT_PARAM, &periodical_query },
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{ "query_period", INT_PARAM, &query_period },
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{ 0, 0, 0 }
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};
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static cmd_export_t cmds[]=
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{
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{"bind_xcap", (cmd_function)bind_xcap, 1, 0, 0, 0},
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{ 0, 0, 0, 0, 0, 0}
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};
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static mi_export_t mi_cmds[] = {
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{ "refreshXcapDoc", refreshXcapDoc, 0, 0, 0},
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{ 0, 0, 0, 0, 0}
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};
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/** module exports */
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struct module_exports exports= {
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"xcap_client", /* module name */
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DEFAULT_DLFLAGS, /* dlopen flags */
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cmds, /* exported functions */
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params, /* exported parameters */
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0, /* exported statistics */
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mi_cmds, /* exported MI functions */
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0, /* exported pseudo-variables */
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0, /* extra processes */
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mod_init, /* module initialization function */
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0, /* response handling function */
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(destroy_function) destroy, /* destroy function */
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child_init /* per-child init function */
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};
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/**
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* init module function
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*/
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static int mod_init(void)
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{
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if(register_mi_mod(exports.name, mi_cmds)!=0)
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{
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LM_ERR("failed to register MI commands\n");
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return -1;
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}
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/* binding to mysql module */
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if (db_bind_mod(&xcap_db_url, &xcap_dbf))
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{
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LM_ERR("Database module not found\n");
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return -1;
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}
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if (!DB_CAPABILITY(xcap_dbf, DB_CAP_ALL)) {
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LM_ERR("Database module does not implement all functions"
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" needed by the module\n");
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return -1;
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}
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xcap_db = xcap_dbf.init(&xcap_db_url);
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if (!xcap_db)
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{
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LM_ERR("while connecting to database\n");
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return -1;
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}
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if(db_check_table_version(&xcap_dbf, xcap_db, &xcap_db_table,
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XCAP_TABLE_VERSION) < 0) {
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LM_ERR("error during table version check.\n");
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return -1;
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}
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xcap_dbf.close(xcap_db);
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xcap_db = NULL;
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curl_global_init(CURL_GLOBAL_ALL);
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if(periodical_query)
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{
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register_timer(query_xcap_update, 0, query_period);
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}
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return 0;
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}
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static int child_init(int rank)
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{
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if (rank==PROC_INIT || rank==PROC_MAIN || rank==PROC_TCP_MAIN)
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return 0; /* do nothing for the main process */
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if((xcap_db = xcap_dbf.init(&xcap_db_url))==NULL)
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{
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LM_ERR("cannot connect to db\n");
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return -1;
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}
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return 0;
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}
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static void destroy(void)
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{
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curl_global_cleanup();
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if(xcap_db != NULL)
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xcap_dbf.close(xcap_db);
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}
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void query_xcap_update(unsigned int ticks, void* param)
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{
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db_key_t query_cols[3], update_cols[3];
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db_val_t query_vals[3], update_vals[3];
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db_key_t result_cols[7];
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int n_result_cols = 0, n_query_cols= 0, n_update_cols= 0;
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db1_res_t* result= NULL;
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int user_col, domain_col, doc_type_col, etag_col, doc_uri_col, port_col;
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db_row_t *row ;
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db_val_t *row_vals ;
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unsigned int port;
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char* etag, *path, *new_etag= NULL, *doc= NULL;
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int u_doc_col, u_etag_col;
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str user, domain, uri;
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int i;
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/* query the ones I have to handle */
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query_cols[n_query_cols] = &str_source_col;
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query_vals[n_query_cols].type = DB1_INT;
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query_vals[n_query_cols].nul = 0;
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query_vals[n_query_cols].val.int_val= XCAP_CL_MOD;
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n_query_cols++;
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query_cols[n_query_cols] = &str_path_col;
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query_vals[n_query_cols].type = DB1_STR;
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query_vals[n_query_cols].nul = 0;
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update_cols[u_doc_col=n_update_cols] = &str_doc_col;
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update_vals[n_update_cols].type = DB1_STRING;
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update_vals[n_update_cols].nul = 0;
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n_update_cols++;
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update_cols[u_etag_col=n_update_cols] = &str_etag_col;
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update_vals[n_update_cols].type = DB1_STRING;
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update_vals[n_update_cols].nul = 0;
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n_update_cols++;
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result_cols[user_col= n_result_cols++] = &str_username_col;
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result_cols[domain_col=n_result_cols++] = &str_domain_col;
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result_cols[doc_type_col=n_result_cols++] = &str_doc_type_col;
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result_cols[etag_col=n_result_cols++] = &str_etag_col;
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result_cols[doc_uri_col= n_result_cols++] = &str_doc_uri_col;
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result_cols[port_col= n_result_cols++] = &str_port_col;
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if (xcap_dbf.use_table(xcap_db, &xcap_db_table) < 0)
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{
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LM_ERR("in use_table-[table]= %.*s\n", xcap_db_table.len, xcap_db_table.s);
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goto error;
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}
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if(xcap_dbf.query(xcap_db, query_cols, 0, query_vals, result_cols, 1,
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n_result_cols, 0, &result)< 0)
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{
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LM_ERR("in sql query\n");
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goto error;
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}
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if(result== NULL)
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{
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LM_ERR("in sql query- null result\n");
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return;
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}
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if(result->n<= 0)
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{
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xcap_dbf.free_result(xcap_db, result);
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return;
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}
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n_query_cols++;
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/* ask if updated */
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for(i= 0; i< result->n; i++)
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{
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row = &result->rows[i];
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row_vals = ROW_VALUES(row);
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path= (char*)row_vals[doc_uri_col].val.string_val;
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port= row_vals[port_col].val.int_val;
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etag= (char*)row_vals[etag_col].val.string_val;
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user.s= (char*)row_vals[user_col].val.string_val;
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user.len= strlen(user.s);
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domain.s= (char*)row_vals[domain_col].val.string_val;
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domain.len= strlen(domain.s);
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/* send HTTP request */
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doc= send_http_get(path, port, etag, IF_NONE_MATCH, &new_etag);
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if(doc== NULL)
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{
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LM_DBG("document not update\n");
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continue;
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}
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if(new_etag== NULL)
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{
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LM_ERR("etag not found\n");
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pkg_free(doc);
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goto error;
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}
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/* update in xcap db table */
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update_vals[u_doc_col].val.string_val= doc;
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update_vals[u_etag_col].val.string_val= etag;
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if(xcap_dbf.update(xcap_db, query_cols, 0, query_vals, update_cols,
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update_vals, n_query_cols, n_update_cols)< 0)
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{
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LM_ERR("in sql update\n");
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pkg_free(doc);
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goto error;
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}
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/* call registered callbacks */
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if(uandd_to_uri(user, domain, &uri)< 0)
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{
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LM_ERR("converting user and domain to uri\n");
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pkg_free(doc);
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goto error;
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}
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run_xcap_update_cb(row_vals[doc_type_col].val.int_val, uri, doc);
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pkg_free(doc);
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}
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xcap_dbf.free_result(xcap_db, result);
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return;
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error:
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if(result)
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xcap_dbf.free_result(xcap_db, result);
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}
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int parse_doc_url(str doc_url, char** serv_addr, xcap_doc_sel_t* doc_sel)
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{
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char* sl, *str_type;
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sl= strchr(doc_url.s, '/');
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*sl= '\0';
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*serv_addr= doc_url.s;
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sl++;
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doc_sel->auid.s= sl;
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sl= strchr(sl, '/');
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doc_sel->auid.len= sl- doc_sel->auid.s;
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sl++;
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str_type= sl;
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sl= strchr(sl, '/');
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*sl= '\0';
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if(strcasecmp(str_type, "users")== 0)
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doc_sel->type= USERS_TYPE;
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else
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if(strcasecmp(str_type, "group")== 0)
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doc_sel->type= GLOBAL_TYPE;
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sl++;
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return 0;
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}
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/*
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* mi cmd: refreshXcapDoc
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* <document uri>
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* <xcap_port>
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* */
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struct mi_root* refreshXcapDoc(struct mi_root* cmd, void* param)
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{
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struct mi_node* node= NULL;
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str doc_url;
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xcap_doc_sel_t doc_sel;
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char* serv_addr;
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char* stream= NULL;
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int type;
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unsigned int xcap_port;
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char* etag= NULL;
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node = cmd->node.kids;
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if(node == NULL)
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return 0;
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doc_url = node->value;
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if(doc_url.s == NULL || doc_url.len== 0)
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{
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LM_ERR("empty uri\n");
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return init_mi_tree(404, "Empty document URL", 20);
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}
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node= node->next;
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if(node== NULL)
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return 0;
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if(node->value.s== NULL || node->value.len== 0)
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{
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LM_ERR("port number\n");
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return init_mi_tree(404, "Empty document URL", 20);
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}
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if(str2int(&node->value, &xcap_port)< 0)
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{
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LM_ERR("while converting string to int\n");
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goto error;
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}
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if(node->next!= NULL)
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return 0;
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/* send GET HTTP request to the server */
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stream= send_http_get(doc_url.s, xcap_port, NULL, 0, &etag);
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if(stream== NULL)
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{
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LM_ERR("in http get\n");
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return 0;
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}
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/* call registered functions with document argument */
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if(parse_doc_url(doc_url, &serv_addr, &doc_sel)< 0)
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{
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LM_ERR("parsing document url\n");
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return 0;
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}
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type= get_auid_flag(doc_sel.auid);
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if(type< 0)
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{
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LM_ERR("incorect auid: %.*s\n",
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doc_sel.auid.len, doc_sel.auid.s);
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goto error;
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}
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run_xcap_update_cb(type, doc_sel.xid, stream);
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return init_mi_tree(200, "OK", 2);
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error:
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if(stream)
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pkg_free(stream);
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return 0;
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}
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#define STR_MATCH(s1, s2) ((s1).len==(s2).len && memcmp((s1).s, (s2).s, (s1).len)==0)
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int get_auid_flag(str auid)
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{
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static str pres_rules = str_init("pres-rules");
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static str rls_services = str_init("rls-services");
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if (STR_MATCH(auid, pres_rules))
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return PRES_RULES;
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else if (STR_MATCH(auid, rls_services))
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return RESOURCE_LIST;
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return -1;
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}
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