mirror of https://github.com/asterisk/asterisk
573 lines
14 KiB
573 lines
14 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2002, Christos Ricudis
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*
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* Christos Ricudis <ricudis@itc.auth.gr>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Connect to PostgreSQL
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/linkedlists.h"
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#include "asterisk/chanvars.h"
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#include "asterisk/lock.h"
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#include "libpq-fe.h"
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static char *tdesc = "Simple PostgreSQL Interface";
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static char *app = "PGSQL";
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static char *synopsis = "Do several SQLy things";
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static char *descrip =
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"PGSQL(): Do several SQLy things\n"
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"Syntax:\n"
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" PGSQL(Connect var option-string)\n"
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" Connects to a database. Option string contains standard PostgreSQL\n"
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" parameters like host=, dbname=, user=. Connection identifer returned\n"
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" in ${var}\n"
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" PGSQL(Query var ${connection_identifier} query-string)\n"
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" Executes standard SQL query contained in query-string using established\n"
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" connection identified by ${connection_identifier}. Reseult of query is\n"
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" is stored in ${var}.\n"
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" PGSQL(Fetch statusvar ${result_identifier} var1 var2 ... varn)\n"
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" Fetches a single row from a result set contained in ${result_identifier}.\n"
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" Assigns returned fields to ${var1} ... ${varn}. ${statusvar} is set TRUE\n"
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" if additional rows exist in reseult set.\n"
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" PGSQL(Clear ${result_identifier})\n"
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" Frees memory and datastructures associated with result set.\n"
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" PGSQL(Disconnect ${connection_identifier})\n"
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" Disconnects from named connection to PostgreSQL.\n" ;
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/*
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Syntax of SQL commands :
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Connect var option-string
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Connects to a database using the option-string and stores the
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connection identifier in ${var}
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Query var ${connection_identifier} query-string
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Submits query-string to database backend and stores the result
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identifier in ${var}
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Fetch statusvar ${result_identifier} var1 var2 var3 ... varn
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Fetches a row from the query and stores end-of-table status in
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${statusvar} and columns in ${var1}..${varn}
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Clear ${result_identifier}
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Clears data structures associated with ${result_identifier}
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Disconnect ${connection_identifier}
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Disconnects from named connection
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EXAMPLES OF USE :
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exten => s,2,PGSQL(Connect connid host=localhost user=asterisk dbname=credit)
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exten => s,3,PGSQL(Query resultid ${connid} SELECT username,credit FROM credit WHERE callerid=${CALLERIDNUM})
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exten => s,4,PGSQL(Fetch fetchid ${resultid} datavar1 datavar2)
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exten => s,5,GotoIf(${fetchid}?6:8)
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exten => s,6,Festival("User ${datavar1} currently has credit balance of ${datavar2} dollars.")
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exten => s,7,Goto(s,4)
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exten => s,8,PGSQL(Clear ${resultid})
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exten => s,9,PGSQL(Disconnect ${connid})
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*/
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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#define AST_PGSQL_ID_DUMMY 0
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#define AST_PGSQL_ID_CONNID 1
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#define AST_PGSQL_ID_RESID 2
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#define AST_PGSQL_ID_FETCHID 3
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struct ast_PGSQL_id {
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int identifier_type; /* 0=dummy, 1=connid, 2=resultid */
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int identifier;
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void *data;
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AST_LIST_ENTRY(ast_PGSQL_id) entries;
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} *ast_PGSQL_id;
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static AST_LIST_HEAD_STATIC(PGSQLidshead,ast_PGSQL_id);
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static void *find_identifier(int identifier,int identifier_type) {
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struct PGSQLidshead *headp;
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struct ast_PGSQL_id *i;
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void *res=NULL;
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int found=0;
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headp=&PGSQLidshead;
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if (AST_LIST_LOCK(headp)) {
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ast_log(LOG_WARNING,"Unable to lock identifiers list\n");
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} else {
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AST_LIST_TRAVERSE(headp,i,entries) {
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if ((i->identifier==identifier) && (i->identifier_type==identifier_type)) {
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found=1;
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res=i->data;
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break;
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}
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}
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if (!found) {
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ast_log(LOG_WARNING,"Identifier %d, identifier_type %d not found in identifier list\n",identifier,identifier_type);
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}
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AST_LIST_UNLOCK(headp);
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}
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return(res);
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}
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static int add_identifier(int identifier_type,void *data) {
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struct ast_PGSQL_id *i,*j;
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struct PGSQLidshead *headp;
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int maxidentifier=0;
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headp=&PGSQLidshead;
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i=NULL;
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j=NULL;
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if (AST_LIST_LOCK(headp)) {
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ast_log(LOG_WARNING,"Unable to lock identifiers list\n");
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return(-1);
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} else {
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i=malloc(sizeof(struct ast_PGSQL_id));
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AST_LIST_TRAVERSE(headp,j,entries) {
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if (j->identifier>maxidentifier) {
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maxidentifier=j->identifier;
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}
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}
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i->identifier=maxidentifier+1;
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i->identifier_type=identifier_type;
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i->data=data;
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AST_LIST_INSERT_HEAD(headp,i,entries);
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AST_LIST_UNLOCK(headp);
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}
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return(i->identifier);
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}
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static int del_identifier(int identifier,int identifier_type) {
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struct ast_PGSQL_id *i;
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struct PGSQLidshead *headp;
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int found=0;
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headp=&PGSQLidshead;
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if (AST_LIST_LOCK(headp)) {
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ast_log(LOG_WARNING,"Unable to lock identifiers list\n");
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} else {
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AST_LIST_TRAVERSE(headp,i,entries) {
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if ((i->identifier==identifier) &&
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(i->identifier_type==identifier_type)) {
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AST_LIST_REMOVE(headp,i,entries);
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free(i);
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found=1;
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break;
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}
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}
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AST_LIST_UNLOCK(headp);
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}
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if (found==0) {
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ast_log(LOG_WARNING,"Could not find identifier %d, identifier_type %d in list to delete\n",identifier,identifier_type);
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return(-1);
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} else {
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return(0);
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}
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}
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static int aPGSQL_connect(struct ast_channel *chan, void *data) {
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char *s1;
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char s[100] = "";
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char *optionstring;
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char *var;
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int l;
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int res;
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PGconn *karoto;
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int id;
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char *stringp=NULL;
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res=0;
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l=strlen(data)+2;
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s1=malloc(l);
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strncpy(s1, data, l -1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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var=strsep(&stringp," ");
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optionstring=strsep(&stringp,"\n");
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karoto = PQconnectdb(optionstring);
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if (PQstatus(karoto) == CONNECTION_BAD) {
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ast_log(LOG_WARNING,"Connection to database using '%s' failed. postgress reports : %s\n", optionstring,
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PQerrorMessage(karoto));
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res=-1;
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} else {
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ast_log(LOG_WARNING,"adding identifier\n");
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id=add_identifier(AST_PGSQL_ID_CONNID,karoto);
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snprintf(s, sizeof(s), "%d", id);
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pbx_builtin_setvar_helper(chan,var,s);
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}
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free(s1);
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return res;
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}
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static int aPGSQL_query(struct ast_channel *chan, void *data) {
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char *s1,*s2,*s3,*s4;
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char s[100] = "";
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char *querystring;
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char *var;
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int l;
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int res,nres;
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PGconn *karoto;
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PGresult *PGSQLres;
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int id,id1;
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char *stringp=NULL;
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res=0;
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l=strlen(data)+2;
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s1=malloc(l);
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s2=malloc(l);
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strncpy(s1, data, l - 1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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s3=strsep(&stringp," ");
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while (1) { /* ugly trick to make branches with break; */
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var=s3;
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s4=strsep(&stringp," ");
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id=atoi(s4);
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querystring=strsep(&stringp,"\n");
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if ((karoto=find_identifier(id,AST_PGSQL_ID_CONNID))==NULL) {
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ast_log(LOG_WARNING,"Invalid connection identifier %d passed in aPGSQL_query\n",id);
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res=-1;
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break;
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}
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PGSQLres=PQexec(karoto,querystring);
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if (PGSQLres==NULL) {
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ast_log(LOG_WARNING,"aPGSQL_query: Connection Error (connection identifier = %d, error message : %s)\n",id,PQerrorMessage(karoto));
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res=-1;
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break;
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}
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if (PQresultStatus(PGSQLres) == PGRES_BAD_RESPONSE ||
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PQresultStatus(PGSQLres) == PGRES_NONFATAL_ERROR ||
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PQresultStatus(PGSQLres) == PGRES_FATAL_ERROR) {
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ast_log(LOG_WARNING,"aPGSQL_query: Query Error (connection identifier : %d, error message : %s)\n",id,PQcmdStatus(PGSQLres));
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res=-1;
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break;
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}
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nres=PQnfields(PGSQLres);
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id1=add_identifier(AST_PGSQL_ID_RESID,PGSQLres);
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snprintf(s, sizeof(s), "%d", id1);
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pbx_builtin_setvar_helper(chan,var,s);
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break;
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}
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free(s1);
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free(s2);
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return(res);
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}
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static int aPGSQL_fetch(struct ast_channel *chan, void *data) {
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char *s1,*s2,*fetchid_var,*s4,*s5,*s6,*s7;
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char s[100];
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char *var;
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int l;
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int res;
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PGresult *PGSQLres;
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int id,id1,i,j,fnd;
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int *lalares=NULL;
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int nres;
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struct ast_var_t *variables;
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struct varshead *headp;
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char *stringp=NULL;
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headp=&chan->varshead;
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res=0;
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l=strlen(data)+2;
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s7=NULL;
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s1=malloc(l);
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s2=malloc(l);
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strncpy(s1, data, l - 1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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fetchid_var=strsep(&stringp," ");
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while (1) { /* ugly trick to make branches with break; */
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var=fetchid_var; /* fetchid */
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fnd=0;
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AST_LIST_TRAVERSE(headp,variables,entries) {
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if (strncasecmp(ast_var_name(variables),fetchid_var,strlen(fetchid_var))==0) {
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s7=ast_var_value(variables);
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fnd=1;
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break;
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}
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}
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if (fnd==0) {
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s7="0";
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pbx_builtin_setvar_helper(chan,fetchid_var,s7);
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}
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s4=strsep(&stringp," ");
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id=atoi(s4); /* resultid */
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if ((PGSQLres=find_identifier(id,AST_PGSQL_ID_RESID))==NULL) {
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ast_log(LOG_WARNING,"Invalid result identifier %d passed in aPGSQL_fetch\n",id);
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res=-1;
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break;
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}
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id=atoi(s7); /*fetchid */
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if ((lalares=find_identifier(id,AST_PGSQL_ID_FETCHID))==NULL) {
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i=0; /* fetching the very first row */
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} else {
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i=*lalares;
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free(lalares);
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del_identifier(id,AST_PGSQL_ID_FETCHID); /* will re-add it a bit later */
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}
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if (i<PQntuples(PGSQLres)) {
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nres=PQnfields(PGSQLres);
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ast_log(LOG_WARNING,"ast_PGSQL_fetch : nres = %d i = %d ;\n",nres,i);
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for (j=0;j<nres;j++) {
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s5=strsep(&stringp," ");
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if (s5==NULL) {
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ast_log(LOG_WARNING,"ast_PGSQL_fetch : More tuples (%d) than variables (%d)\n",nres,j);
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break;
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}
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s6=PQgetvalue(PGSQLres,i,j);
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if (s6==NULL) {
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ast_log(LOG_WARNING,"PWgetvalue(res,%d,%d) returned NULL in ast_PGSQL_fetch\n",i,j);
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break;
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}
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ast_log(LOG_WARNING,"===setting variable '%s' to '%s'\n",s5,s6);
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pbx_builtin_setvar_helper(chan,s5,s6);
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}
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lalares=malloc(sizeof(int));
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*lalares = ++i; /* advance to the next row */
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id1 = add_identifier(AST_PGSQL_ID_FETCHID,lalares);
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} else {
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ast_log(LOG_WARNING,"ast_PGSQL_fetch : EOF\n");
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id1 = 0; /* no more rows */
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}
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snprintf(s, sizeof(s), "%d", id1);
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ast_log(LOG_WARNING,"Setting var '%s' to value '%s'\n",fetchid_var,s);
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pbx_builtin_setvar_helper(chan,fetchid_var,s);
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break;
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}
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free(s1);
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free(s2);
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return(res);
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}
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static int aPGSQL_reset(struct ast_channel *chan, void *data) {
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char *s1,*s3;
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int l;
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PGconn *karoto;
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int id;
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char *stringp=NULL;
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l=strlen(data)+2;
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s1=malloc(l);
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strncpy(s1, data, l - 1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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s3=strsep(&stringp," ");
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id=atoi(s3);
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if ((karoto=find_identifier(id,AST_PGSQL_ID_CONNID))==NULL) {
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ast_log(LOG_WARNING,"Invalid connection identifier %d passed in aPGSQL_reset\n",id);
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} else {
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PQreset(karoto);
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}
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free(s1);
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return(0);
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}
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static int aPGSQL_clear(struct ast_channel *chan, void *data) {
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char *s1,*s3;
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int l;
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PGresult *karoto;
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int id;
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char *stringp=NULL;
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l=strlen(data)+2;
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s1=malloc(l);
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strncpy(s1, data, l - 1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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s3=strsep(&stringp," ");
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id=atoi(s3);
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if ((karoto=find_identifier(id,AST_PGSQL_ID_RESID))==NULL) {
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ast_log(LOG_WARNING,"Invalid result identifier %d passed in aPGSQL_clear\n",id);
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} else {
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PQclear(karoto);
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del_identifier(id,AST_PGSQL_ID_RESID);
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}
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free(s1);
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return(0);
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}
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static int aPGSQL_disconnect(struct ast_channel *chan, void *data) {
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char *s1,*s3;
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int l;
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PGconn *karoto;
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int id;
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char *stringp=NULL;
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l=strlen(data)+2;
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s1=malloc(l);
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strncpy(s1, data, l - 1);
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stringp=s1;
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strsep(&stringp," "); /* eat the first token, we already know it :P */
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s3=strsep(&stringp," ");
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id=atoi(s3);
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if ((karoto=find_identifier(id,AST_PGSQL_ID_CONNID))==NULL) {
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ast_log(LOG_WARNING,"Invalid connection identifier %d passed in aPGSQL_disconnect\n",id);
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} else {
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PQfinish(karoto);
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del_identifier(id,AST_PGSQL_ID_CONNID);
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}
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free(s1);
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return(0);
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}
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static int aPGSQL_debug(struct ast_channel *chan, void *data) {
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ast_log(LOG_WARNING,"Debug : %s\n",(char *)data);
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return(0);
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}
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static int PGSQL_exec(struct ast_channel *chan, void *data)
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{
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struct localuser *u;
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int result;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "APP_PGSQL requires an argument (see manual)\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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result=0;
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|
|
|
if (strncasecmp("connect",data,strlen("connect"))==0) {
|
|
result=(aPGSQL_connect(chan,data));
|
|
} else if (strncasecmp("query",data,strlen("query"))==0) {
|
|
result=(aPGSQL_query(chan,data));
|
|
} else if (strncasecmp("fetch",data,strlen("fetch"))==0) {
|
|
result=(aPGSQL_fetch(chan,data));
|
|
} else if (strncasecmp("reset",data,strlen("reset"))==0) {
|
|
result=(aPGSQL_reset(chan,data));
|
|
} else if (strncasecmp("clear",data,strlen("clear"))==0) {
|
|
result=(aPGSQL_clear(chan,data));
|
|
} else if (strncasecmp("debug",data,strlen("debug"))==0) {
|
|
result=(aPGSQL_debug(chan,data));
|
|
} else if (strncasecmp("disconnect",data,strlen("disconnect"))==0) {
|
|
result=(aPGSQL_disconnect(chan,data));
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unknown APP_PGSQL argument : %s\n",(char *)data);
|
|
result=-1;
|
|
}
|
|
|
|
LOCAL_USER_REMOVE(u);
|
|
|
|
return result;
|
|
}
|
|
|
|
int unload_module(void)
|
|
{
|
|
int res;
|
|
|
|
res = ast_unregister_application(app);
|
|
|
|
STANDARD_HANGUP_LOCALUSERS;
|
|
|
|
return res;
|
|
}
|
|
|
|
int load_module(void)
|
|
{
|
|
return ast_register_application(app, PGSQL_exec, synopsis, descrip);
|
|
}
|
|
|
|
char *description(void)
|
|
{
|
|
return tdesc;
|
|
}
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
STANDARD_USECOUNT(res);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|