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/*
linphone
Copyright (C) 2000-2009 Simon MORLAT (simon.morlat@linphone.org)
This program 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 program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* enum lookup code */
#ifndef _WIN32_WCE
#include <errno.h>
#endif
#include <string.h>
#include "enum.h"
#define DNS_ANSWER_MAX_SIZE 2048
static char *create_enum_domain(const char *number){
int len=strlen(number);
char *domain=ms_malloc((len*2)+10);
int i,j;
for (i=0,j=len-1;j>=0;j--){
domain[i]=number[j];
i++;
domain[i]='.';
i++;
}
strcpy(&domain[i],"e164.arpa");
ms_message("enum domain for %s is %s",number,domain);
return domain;
}
static bool_t is_a_number(const char *str){
char *p=(char *)str;
bool_t res=FALSE;
bool_t space_found=FALSE;
for(;;p++){
switch(p[0]){
case '9':
case '8':
case '7':
case '6':
case '5':
case '4':
case '3':
case '2':
case '1':
case '0':
res=TRUE;
if (space_found) return FALSE; /* avoid splited numbers */
break;
case '\0':
return res;
break;
case ' ':
space_found=TRUE;
break;
default:
return FALSE;
}
}
return FALSE;
}
//4970072278724
bool_t is_enum(const char *sipaddress, char **enum_domain){
char *p;
p=strstr(sipaddress,"sip:");
if (p==NULL) return FALSE; /* enum should look like sip:4369959250*/
else p+=4;
if (is_a_number(p)){
if (enum_domain!=NULL){
*enum_domain=create_enum_domain(p);
}
return TRUE;
}
return FALSE;
}
int enum_lookup(const char *enum_domain, enum_lookup_res_t **res){
int err;
//char dns_answer[DNS_ANSWER_MAX_SIZE];
char *begin,*end;
char *host_result, *command;
int i;
bool_t forkok;
/*
ns_msg handle;
int count;
memset(&handle,0,sizeof(handle));
*res=NULL;
ms_message("Resolving %s...",enum_domain);
err=res_search(enum_domain,ns_c_in,ns_t_naptr,dns_answer,DNS_ANSWER_MAX_SIZE);
if (err<0){
ms_warning("Error resolving enum:",herror(h_errno));
return -1;
}
ns_initparse(dns_answer,DNS_ANSWER_MAX_SIZE,&handle);
count=ns_msg_count(handle,ns_s_an);
for(i=0;i<count;i++){
ns_rr rr;
memset(&rr,0,sizeof(rr));
ns_parserr(&handle,ns_s_an,i,&rr);
ms_message("data=%s",ns_rr_rdata(rr));
}
*/
command=ms_strdup_printf("host -t naptr %s",enum_domain);
forkok=lp_spawn_command_line_sync(command,&host_result,&err);
ms_free(command);
if (forkok){
if (err!=0){
ms_warning("Host exited with %i error status.",err);
return -1;
}
}else{
ms_warning("Could not spawn the \'host\' command.");
return -1;
}
ms_message("Answer received from dns (err=%i): %s",err,host_result);
begin=strstr(host_result,"sip:");
if (begin==0) {
ms_warning("No sip address found in dns naptr answer.");
return -1;
}
*res=ms_malloc0(sizeof(enum_lookup_res_t));
err=0;
for(i=0;i<MAX_ENUM_LOOKUP_RESULTS;i++){
end=strstr(begin,"!");
if (end==NULL) goto parse_error;
end[0]='\0';
(*res)->sip_address[i]=ms_strdup(begin);
err++;
begin=strstr(end+1,"sip:");
if (begin==NULL) break;
}
ms_free(host_result);
return err;
parse_error:
ms_free(*res);
ms_free(host_result);
*res=NULL;
ms_warning("Parse error in enum_lookup().");
return -1;
}
void enum_lookup_res_free(enum_lookup_res_t *res){
int i;
for (i=0;i<MAX_ENUM_LOOKUP_RESULTS;i++){
if (res->sip_address[i]!=NULL) ms_free(res->sip_address[i]);
}
ms_free(res);
}
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