mirror of
https://github.com/asterisk/asterisk.git
synced 2025-11-03 20:38:59 +00:00
4fc8108a2b
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@546 65c4cc65-6c06-0410-ace0-fbb531ad65f3
119 lines
2.4 KiB
C
Executable File
119 lines
2.4 KiB
C
Executable File
/*
|
|
* Asterisk -- A telephony toolkit for Linux.
|
|
*
|
|
* Various sorts of access control
|
|
*
|
|
* Copyright (C) 1999, Mark Spencer
|
|
*
|
|
* Mark Spencer <markster@linux-support.net>
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
#include <string.h>
|
|
#include <sys/time.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <asterisk/acl.h>
|
|
#include <asterisk/logger.h>
|
|
#include <arpa/inet.h>
|
|
#include <sys/socket.h>
|
|
#include <netdb.h>
|
|
|
|
#define AST_SENSE_DENY 0
|
|
#define AST_SENSE_ALLOW 1
|
|
|
|
struct ast_ha {
|
|
/* Host access rule */
|
|
struct in_addr netaddr;
|
|
struct in_addr netmask;
|
|
int sense;
|
|
struct ast_ha *next;
|
|
};
|
|
|
|
void ast_free_ha(struct ast_ha *ha)
|
|
{
|
|
struct ast_ha *hal;
|
|
while(ha) {
|
|
hal = ha;
|
|
ha = ha->next;
|
|
free(hal);
|
|
}
|
|
}
|
|
|
|
struct ast_ha *ast_append_ha(char *sense, char *stuff, struct ast_ha *path)
|
|
{
|
|
struct ast_ha *ha = malloc(sizeof(struct ast_ha));
|
|
char *nm;
|
|
struct ast_ha *prev = NULL;
|
|
struct ast_ha *ret;
|
|
ret = path;
|
|
while(path) {
|
|
prev = path;
|
|
path = path->next;
|
|
}
|
|
if (ha) {
|
|
char *stringp=NULL;
|
|
stringp=stuff;
|
|
strsep(&stringp, "/");
|
|
nm = strsep(&stringp, "/");
|
|
if (!nm)
|
|
nm = "255.255.255.255";
|
|
if (!inet_aton(stuff, &ha->netaddr)) {
|
|
ast_log(LOG_WARNING, "%s not a valid IP\n", stuff);
|
|
free(ha);
|
|
return NULL;
|
|
}
|
|
if (!inet_aton(nm, &ha->netmask)) {
|
|
ast_log(LOG_WARNING, "%s not a valid netmask\n", nm);
|
|
free(ha);
|
|
return NULL;
|
|
}
|
|
ha->netaddr.s_addr &= ha->netmask.s_addr;
|
|
if (!strncasecmp(sense, "p", 1)) {
|
|
ha->sense = AST_SENSE_ALLOW;
|
|
} else {
|
|
ha->sense = AST_SENSE_DENY;
|
|
}
|
|
ha->next = NULL;
|
|
if (prev)
|
|
prev->next = ha;
|
|
else
|
|
ret = ha;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int ast_apply_ha(struct ast_ha *ha, struct sockaddr_in *sin)
|
|
{
|
|
/* Start optimistic */
|
|
int res = AST_SENSE_ALLOW;
|
|
while(ha) {
|
|
/* For each rule, if this address and the netmask = the net address
|
|
apply the current rule */
|
|
if ((sin->sin_addr.s_addr & ha->netmask.s_addr) == (ha->netaddr.s_addr))
|
|
res = ha->sense;
|
|
ha = ha->next;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int ast_get_ip(struct sockaddr_in *sin, char *value)
|
|
{
|
|
struct hostent *hp;
|
|
hp = gethostbyname(value);
|
|
if (hp) {
|
|
memcpy(&sin->sin_addr, hp->h_addr, sizeof(sin->sin_addr));
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unable to lookup '%s'\n", value);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|