Created the following AMI commands and corresponding events for res_pjsip: PJSIPShowEndpoints - Provides a listing of all pjsip endpoints and a few select attributes on each. Events: EndpointList - for each endpoint a few attributes. EndpointlistComplete - after all endpoints have been listed. PJSIPShowEndpoint - Provides a detail list of attributes for a specified endpoint. Events: EndpointDetail - attributes on an endpoint. AorDetail - raised for each AOR on an endpoint. AuthDetail - raised for each associated inbound and outbound auth TransportDetail - transport attributes. IdentifyDetail - attributes for the identify object associated with the endpoint. EndpointDetailComplete - last event raised after all detail events. PJSIPShowRegistrationsInbound - Provides a detail listing of all inbound registrations. Events: InboundRegistrationDetail - inbound registration attributes for each registration. InboundRegistrationDetailComplete - raised after all detail records have been listed. PJSIPShowRegistrationsOutbound - Provides a detail listing of all outbound registrations. Events: OutboundRegistrationDetail - outbound registration attributes for each registration. OutboundRegistrationDetailComplete - raised after all detail records have been listed. PJSIPShowSubscriptionsInbound - A detail listing of all inbound subscriptions and their attributes. Events: SubscriptionDetail - on each subscription detailed attributes SubscriptionDetailComplete - raised after all detail records have been listed. PJSIPShowSubscriptionsOutbound - A detail listing of all outboundbound subscriptions and their attributes. Events: SubscriptionDetail - on each subscription detailed attributes SubscriptionDetailComplete - raised after all detail records have been listed. (issue ASTERISK-22609) Reported by: Matt Jordan Review: https://reviewboard.asterisk.org/r/2959/ ........ Merged revisions 403131 from http://svn.asterisk.org/svn/asterisk/branches/12 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403133 65c4cc65-6c06-0410-ace0-fbb531ad65f3
976 lines
25 KiB
C
976 lines
25 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2012, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*! \file
|
|
*
|
|
* \brief Various sorts of access control
|
|
*
|
|
* \author Mark Spencer <markster@digium.com>
|
|
*/
|
|
|
|
/*** MODULEINFO
|
|
<support_level>core</support_level>
|
|
***/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include "asterisk/network.h"
|
|
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__Darwin__)
|
|
#include <fcntl.h>
|
|
#include <net/route.h>
|
|
#endif
|
|
|
|
#if defined(SOLARIS)
|
|
#include <sys/sockio.h>
|
|
#include <net/if.h>
|
|
#elif defined(HAVE_GETIFADDRS)
|
|
#include <ifaddrs.h>
|
|
#endif
|
|
|
|
#include "asterisk/acl.h"
|
|
#include "asterisk/channel.h"
|
|
#include "asterisk/utils.h"
|
|
#include "asterisk/lock.h"
|
|
#include "asterisk/srv.h"
|
|
|
|
#if (!defined(SOLARIS) && !defined(HAVE_GETIFADDRS))
|
|
static int get_local_address(struct ast_sockaddr *ourip)
|
|
{
|
|
return -1;
|
|
}
|
|
#else
|
|
static void score_address(const struct sockaddr_in *sin, struct in_addr *best_addr, int *best_score)
|
|
{
|
|
const char *address;
|
|
int score;
|
|
|
|
address = ast_inet_ntoa(sin->sin_addr);
|
|
|
|
/* RFC 1700 alias for the local network */
|
|
if (address[0] == '0') {
|
|
score = -25;
|
|
/* RFC 1700 localnet */
|
|
} else if (strncmp(address, "127", 3) == 0) {
|
|
score = -20;
|
|
/* RFC 1918 non-public address space */
|
|
} else if (strncmp(address, "10.", 3) == 0) {
|
|
score = -5;
|
|
/* RFC 1918 non-public address space */
|
|
} else if (strncmp(address, "172", 3) == 0) {
|
|
/* 172.16.0.0 - 172.19.255.255, but not 172.160.0.0 - 172.169.255.255 */
|
|
if (address[4] == '1' && address[5] >= '6' && address[6] == '.') {
|
|
score = -5;
|
|
/* 172.20.0.0 - 172.29.255.255, but not 172.200.0.0 - 172.255.255.255 nor 172.2.0.0 - 172.2.255.255 */
|
|
} else if (address[4] == '2' && address[6] == '.') {
|
|
score = -5;
|
|
/* 172.30.0.0 - 172.31.255.255, but not 172.3.0.0 - 172.3.255.255 */
|
|
} else if (address[4] == '3' && (address[5] == '0' || address[5] == '1')) {
|
|
score = -5;
|
|
/* All other 172 addresses are public */
|
|
} else {
|
|
score = 0;
|
|
}
|
|
/* RFC 2544 Benchmark test range (198.18.0.0 - 198.19.255.255, but not 198.180.0.0 - 198.199.255.255) */
|
|
} else if (strncmp(address, "198.1", 5) == 0 && address[5] >= '8' && address[6] == '.') {
|
|
score = -10;
|
|
/* RFC 1918 non-public address space */
|
|
} else if (strncmp(address, "192.168", 7) == 0) {
|
|
score = -5;
|
|
/* RFC 3330 Zeroconf network */
|
|
} else if (strncmp(address, "169.254", 7) == 0) {
|
|
/*!\note Better score than a test network, but not quite as good as RFC 1918
|
|
* address space. The reason is that some Linux distributions automatically
|
|
* configure a Zeroconf address before trying DHCP, so we want to prefer a
|
|
* DHCP lease to a Zeroconf address.
|
|
*/
|
|
score = -10;
|
|
/* RFC 3330 Test network */
|
|
} else if (strncmp(address, "192.0.2.", 8) == 0) {
|
|
score = -15;
|
|
/* Every other address should be publically routable */
|
|
} else {
|
|
score = 0;
|
|
}
|
|
|
|
if (score > *best_score) {
|
|
*best_score = score;
|
|
memcpy(best_addr, &sin->sin_addr, sizeof(*best_addr));
|
|
}
|
|
}
|
|
|
|
static int get_local_address(struct ast_sockaddr *ourip)
|
|
{
|
|
int s, res = -1;
|
|
#ifdef SOLARIS
|
|
struct lifreq *ifr = NULL;
|
|
struct lifnum ifn;
|
|
struct lifconf ifc;
|
|
struct sockaddr_in *sa;
|
|
char *buf = NULL;
|
|
int bufsz, x;
|
|
#endif /* SOLARIS */
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
|
|
struct ifaddrs *ifap, *ifaphead;
|
|
int rtnerr;
|
|
const struct sockaddr_in *sin;
|
|
#endif /* BSD_OR_LINUX */
|
|
struct in_addr best_addr;
|
|
int best_score = -100;
|
|
memset(&best_addr, 0, sizeof(best_addr));
|
|
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
|
|
rtnerr = getifaddrs(&ifaphead);
|
|
if (rtnerr) {
|
|
perror(NULL);
|
|
return -1;
|
|
}
|
|
#endif /* BSD_OR_LINUX */
|
|
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
|
|
if (s > 0) {
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
|
|
for (ifap = ifaphead; ifap; ifap = ifap->ifa_next) {
|
|
|
|
if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_INET) {
|
|
sin = (const struct sockaddr_in *) ifap->ifa_addr;
|
|
score_address(sin, &best_addr, &best_score);
|
|
res = 0;
|
|
|
|
if (best_score == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif /* BSD_OR_LINUX */
|
|
|
|
/* There is no reason whatsoever that this shouldn't work on Linux or BSD also. */
|
|
#ifdef SOLARIS
|
|
/* Get a count of interfaces on the machine */
|
|
ifn.lifn_family = AF_INET;
|
|
ifn.lifn_flags = 0;
|
|
ifn.lifn_count = 0;
|
|
if (ioctl(s, SIOCGLIFNUM, &ifn) < 0) {
|
|
close(s);
|
|
return -1;
|
|
}
|
|
|
|
bufsz = ifn.lifn_count * sizeof(struct lifreq);
|
|
if (!(buf = malloc(bufsz))) {
|
|
close(s);
|
|
return -1;
|
|
}
|
|
memset(buf, 0, bufsz);
|
|
|
|
/* Get a list of interfaces on the machine */
|
|
ifc.lifc_len = bufsz;
|
|
ifc.lifc_buf = buf;
|
|
ifc.lifc_family = AF_INET;
|
|
ifc.lifc_flags = 0;
|
|
if (ioctl(s, SIOCGLIFCONF, &ifc) < 0) {
|
|
close(s);
|
|
free(buf);
|
|
return -1;
|
|
}
|
|
|
|
for (ifr = ifc.lifc_req, x = 0; x < ifn.lifn_count; ifr++, x++) {
|
|
sa = (struct sockaddr_in *)&(ifr->lifr_addr);
|
|
score_address(sa, &best_addr, &best_score);
|
|
res = 0;
|
|
|
|
if (best_score == 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
free(buf);
|
|
#endif /* SOLARIS */
|
|
|
|
close(s);
|
|
}
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__)
|
|
freeifaddrs(ifaphead);
|
|
#endif /* BSD_OR_LINUX */
|
|
|
|
if (res == 0 && ourip) {
|
|
ast_sockaddr_setnull(ourip);
|
|
ourip->ss.ss_family = AF_INET;
|
|
((struct sockaddr_in *)&ourip->ss)->sin_addr = best_addr;
|
|
}
|
|
return res;
|
|
}
|
|
#endif /* HAVE_GETIFADDRS */
|
|
|
|
/* Free HA structure */
|
|
void ast_free_ha(struct ast_ha *ha)
|
|
{
|
|
struct ast_ha *hal;
|
|
while (ha) {
|
|
hal = ha;
|
|
ha = ha->next;
|
|
ast_free(hal);
|
|
}
|
|
}
|
|
|
|
/* Free ACL list structure */
|
|
struct ast_acl_list *ast_free_acl_list(struct ast_acl_list *acl_list)
|
|
{
|
|
struct ast_acl *current;
|
|
|
|
if (!acl_list) {
|
|
return NULL;
|
|
}
|
|
|
|
AST_LIST_LOCK(acl_list);
|
|
while ((current = AST_LIST_REMOVE_HEAD(acl_list, list))) {
|
|
ast_free_ha(current->acl);
|
|
ast_free(current);
|
|
}
|
|
AST_LIST_UNLOCK(acl_list);
|
|
|
|
AST_LIST_HEAD_DESTROY(acl_list);
|
|
ast_free(acl_list);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Copy HA structure */
|
|
void ast_copy_ha(const struct ast_ha *from, struct ast_ha *to)
|
|
{
|
|
ast_sockaddr_copy(&to->addr, &from->addr);
|
|
ast_sockaddr_copy(&to->netmask, &from->netmask);
|
|
to->sense = from->sense;
|
|
}
|
|
|
|
/* Create duplicate of ha structure */
|
|
static struct ast_ha *ast_duplicate_ha(struct ast_ha *original)
|
|
{
|
|
struct ast_ha *new_ha;
|
|
|
|
if ((new_ha = ast_calloc(1, sizeof(*new_ha)))) {
|
|
/* Copy from original to new object */
|
|
ast_copy_ha(original, new_ha);
|
|
}
|
|
|
|
return new_ha;
|
|
}
|
|
|
|
/* Create duplicate HA link list */
|
|
/* Used in chan_sip2 templates */
|
|
struct ast_ha *ast_duplicate_ha_list(struct ast_ha *original)
|
|
{
|
|
struct ast_ha *start = original;
|
|
struct ast_ha *ret = NULL;
|
|
struct ast_ha *current, *prev = NULL;
|
|
|
|
while (start) {
|
|
current = ast_duplicate_ha(start); /* Create copy of this object */
|
|
if (prev) {
|
|
prev->next = current; /* Link previous to this object */
|
|
}
|
|
|
|
if (!ret) {
|
|
ret = current; /* Save starting point */
|
|
}
|
|
|
|
start = start->next; /* Go to next object */
|
|
prev = current; /* Save pointer to this object */
|
|
}
|
|
return ret; /* Return start of list */
|
|
}
|
|
|
|
static int acl_new(struct ast_acl **pointer, const char *name) {
|
|
struct ast_acl *acl;
|
|
if (!(acl = ast_calloc(1, sizeof(*acl)))) {
|
|
return 1;
|
|
}
|
|
|
|
*pointer = acl;
|
|
ast_copy_string(acl->name, name, ACL_NAME_LENGTH);
|
|
return 0;
|
|
}
|
|
|
|
struct ast_acl_list *ast_duplicate_acl_list(struct ast_acl_list *original)
|
|
{
|
|
struct ast_acl_list *clone;
|
|
struct ast_acl *current_cursor;
|
|
struct ast_acl *current_clone;
|
|
|
|
/* Early return if we receive a duplication request for a NULL original. */
|
|
if (!original) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!(clone = ast_calloc(1, sizeof(*clone)))) {
|
|
ast_log(LOG_WARNING, "Failed to allocate ast_acl_list struct while cloning an ACL\n");
|
|
return NULL;
|
|
}
|
|
AST_LIST_HEAD_INIT(clone);
|
|
|
|
AST_LIST_LOCK(original);
|
|
|
|
AST_LIST_TRAVERSE(original, current_cursor, list) {
|
|
if ((acl_new(¤t_clone, current_cursor->name))) {
|
|
ast_log(LOG_WARNING, "Failed to allocate ast_acl struct while cloning an ACL.");
|
|
continue;
|
|
}
|
|
|
|
/* Copy data from original ACL to clone ACL */
|
|
current_clone->acl = ast_duplicate_ha_list(current_cursor->acl);
|
|
|
|
current_clone->is_invalid = current_cursor->is_invalid;
|
|
current_clone->is_realtime = current_cursor->is_realtime;
|
|
|
|
AST_LIST_INSERT_TAIL(clone, current_clone, list);
|
|
}
|
|
|
|
AST_LIST_UNLOCK(original);
|
|
|
|
return clone;
|
|
}
|
|
|
|
/*!
|
|
* \brief
|
|
* Parse a netmask in CIDR notation
|
|
*
|
|
* \details
|
|
* For a mask of an IPv4 address, this should be a number between 0 and 32. For
|
|
* a mask of an IPv6 address, this should be a number between 0 and 128. This
|
|
* function creates an IPv6 ast_sockaddr from the given netmask. For masks of
|
|
* IPv4 addresses, this is accomplished by adding 96 to the original netmask.
|
|
*
|
|
* \param[out] addr The ast_sockaddr produced from the CIDR netmask
|
|
* \param is_v4 Tells if the address we are masking is IPv4.
|
|
* \param mask_str The CIDR mask to convert
|
|
* \retval -1 Failure
|
|
* \retval 0 Success
|
|
*/
|
|
static int parse_cidr_mask(struct ast_sockaddr *addr, int is_v4, const char *mask_str)
|
|
{
|
|
int mask;
|
|
|
|
if (sscanf(mask_str, "%30d", &mask) != 1) {
|
|
return -1;
|
|
}
|
|
|
|
if (is_v4) {
|
|
struct sockaddr_in sin;
|
|
if (mask < 0 || mask > 32) {
|
|
return -1;
|
|
}
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
/* If mask is 0, then we already have the
|
|
* appropriate all 0s address in sin from
|
|
* the above memset.
|
|
*/
|
|
if (mask != 0) {
|
|
sin.sin_addr.s_addr = htonl(0xFFFFFFFF << (32 - mask));
|
|
}
|
|
ast_sockaddr_from_sin(addr, &sin);
|
|
} else {
|
|
struct sockaddr_in6 sin6;
|
|
int i;
|
|
if (mask < 0 || mask > 128) {
|
|
return -1;
|
|
}
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_INET6;
|
|
for (i = 0; i < 4; ++i) {
|
|
/* Once mask reaches 0, we don't have
|
|
* to explicitly set anything anymore
|
|
* since sin6 was zeroed out already
|
|
*/
|
|
if (mask > 0) {
|
|
V6_WORD(&sin6, i) = htonl(0xFFFFFFFF << (mask < 32 ? (32 - mask) : 0));
|
|
mask -= mask < 32 ? mask : 32;
|
|
}
|
|
}
|
|
memcpy(&addr->ss, &sin6, sizeof(sin6));
|
|
addr->len = sizeof(sin6);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ast_append_acl(const char *sense, const char *stuff, struct ast_acl_list **path, int *error, int *named_acl_flag)
|
|
{
|
|
struct ast_acl *acl = NULL;
|
|
struct ast_acl *current;
|
|
struct ast_acl_list *working_list;
|
|
|
|
char *tmp, *list;
|
|
|
|
/* If the ACL list is currently uninitialized, it must be initialized. */
|
|
if (*path == NULL) {
|
|
struct ast_acl_list *list;
|
|
list = ast_calloc(1, sizeof(*list));
|
|
if (!list) {
|
|
/* Allocation Error */
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return;
|
|
}
|
|
|
|
AST_LIST_HEAD_INIT(list);
|
|
*path = list;
|
|
}
|
|
|
|
working_list = *path;
|
|
|
|
AST_LIST_LOCK(working_list);
|
|
|
|
/* First we need to determine if we will need to add a new ACL node or if we can use an existing one. */
|
|
if (strncasecmp(sense, "a", 1)) {
|
|
/* The first element in the path should be the unnamed, base ACL. If that's the case, we use it. If not,
|
|
* we have to make one and link it up appropriately. */
|
|
current = AST_LIST_FIRST(working_list);
|
|
|
|
if (!current || !ast_strlen_zero(current->name)) {
|
|
if (acl_new(&acl, "")) {
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
}
|
|
// Need to INSERT the ACL at the head here.
|
|
AST_LIST_INSERT_HEAD(working_list, acl, list);
|
|
} else {
|
|
/* If the first element was already the unnamed base ACL, we just use that one. */
|
|
acl = current;
|
|
}
|
|
|
|
/* With the proper ACL set for modification, we can just pass this off to the ast_ha append function. */
|
|
acl->acl = ast_append_ha(sense, stuff, acl->acl, error);
|
|
|
|
AST_LIST_UNLOCK(working_list);
|
|
return;
|
|
}
|
|
|
|
/* We are in ACL append mode, so we know we'll be adding one or more named ACLs. */
|
|
list = ast_strdupa(stuff);
|
|
|
|
while ((tmp = strsep(&list, ","))) {
|
|
struct ast_ha *named_ha;
|
|
int already_included = 0;
|
|
|
|
/* Remove leading whitespace from the string in case the user put spaces between items */
|
|
tmp = ast_skip_blanks(tmp);
|
|
|
|
/* The first step is to check for a duplicate */
|
|
AST_LIST_TRAVERSE(working_list, current, list) {
|
|
if (!strcasecmp(current->name, tmp)) { /* ACL= */
|
|
/* Inclusion of the same ACL multiple times isn't a catastrophic error, but it will raise the error flag and skip the entry. */
|
|
ast_log(LOG_ERROR, "Named ACL '%s' is already included in the ast_acl container.", tmp);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
already_included = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (already_included) {
|
|
continue;
|
|
}
|
|
|
|
if (acl_new(&acl, tmp)) {
|
|
/* This is a catastrophic allocation error and we'll return immediately if this happens. */
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
AST_LIST_UNLOCK(working_list);
|
|
return;
|
|
}
|
|
|
|
/* Attempt to grab the Named ACL we are looking for. */
|
|
named_ha = ast_named_acl_find(tmp, &acl->is_realtime, &acl->is_invalid);
|
|
|
|
/* Set the ACL's ast_ha to the duplicated named ACL retrieved above. */
|
|
acl->acl = named_ha;
|
|
|
|
/* Raise the named_acl_flag since we are adding a named ACL to the ACL container. */
|
|
if (named_acl_flag) {
|
|
*named_acl_flag = 1;
|
|
}
|
|
|
|
/* Now insert the new ACL at the end of the list. */
|
|
AST_LIST_INSERT_TAIL(working_list, acl, list);
|
|
}
|
|
|
|
AST_LIST_UNLOCK(working_list);
|
|
}
|
|
|
|
int ast_acl_list_is_empty(struct ast_acl_list *acl_list)
|
|
{
|
|
struct ast_acl *head;
|
|
|
|
if (!acl_list) {
|
|
return 1;
|
|
}
|
|
|
|
AST_LIST_LOCK(acl_list);
|
|
head = AST_LIST_FIRST(acl_list);
|
|
AST_LIST_UNLOCK(acl_list);
|
|
|
|
if (head) {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct ast_ha *ast_append_ha(const char *sense, const char *stuff, struct ast_ha *path, int *error)
|
|
{
|
|
struct ast_ha *ha;
|
|
struct ast_ha *prev = NULL;
|
|
struct ast_ha *ret;
|
|
char *tmp, *list = ast_strdupa(stuff);
|
|
char *address = NULL, *mask = NULL;
|
|
int addr_is_v4;
|
|
int allowing = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW;
|
|
const char *parsed_addr, *parsed_mask;
|
|
|
|
ret = path;
|
|
while (path) {
|
|
prev = path;
|
|
path = path->next;
|
|
}
|
|
|
|
while ((tmp = strsep(&list, ","))) {
|
|
if (!(ha = ast_calloc(1, sizeof(*ha)))) {
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
address = strsep(&tmp, "/");
|
|
if (!address) {
|
|
address = tmp;
|
|
} else {
|
|
mask = tmp;
|
|
}
|
|
|
|
if (*address == '!') {
|
|
ha->sense = (allowing == AST_SENSE_DENY) ? AST_SENSE_ALLOW : AST_SENSE_DENY;
|
|
address++;
|
|
} else {
|
|
ha->sense = allowing;
|
|
}
|
|
|
|
if (!ast_sockaddr_parse(&ha->addr, address, PARSE_PORT_FORBID)) {
|
|
ast_log(LOG_WARNING, "Invalid IP address: %s\n", address);
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* If someone specifies an IPv4-mapped IPv6 address,
|
|
* we just convert this to an IPv4 ACL
|
|
*/
|
|
if (ast_sockaddr_ipv4_mapped(&ha->addr, &ha->addr)) {
|
|
ast_log(LOG_NOTICE, "IPv4-mapped ACL network address specified. "
|
|
"Converting to an IPv4 ACL network address.\n");
|
|
}
|
|
|
|
addr_is_v4 = ast_sockaddr_is_ipv4(&ha->addr);
|
|
|
|
if (!mask) {
|
|
parse_cidr_mask(&ha->netmask, addr_is_v4, addr_is_v4 ? "32" : "128");
|
|
} else if (strchr(mask, ':') || strchr(mask, '.')) {
|
|
int mask_is_v4;
|
|
/* Mask is of x.x.x.x or x:x:x:x:x:x:x:x variety */
|
|
if (!ast_sockaddr_parse(&ha->netmask, mask, PARSE_PORT_FORBID)) {
|
|
ast_log(LOG_WARNING, "Invalid netmask: %s\n", mask);
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
/* If someone specifies an IPv4-mapped IPv6 netmask,
|
|
* we just convert this to an IPv4 ACL
|
|
*/
|
|
if (ast_sockaddr_ipv4_mapped(&ha->netmask, &ha->netmask)) {
|
|
ast_log(LOG_NOTICE, "IPv4-mapped ACL netmask specified. "
|
|
"Converting to an IPv4 ACL netmask.\n");
|
|
}
|
|
mask_is_v4 = ast_sockaddr_is_ipv4(&ha->netmask);
|
|
if (addr_is_v4 ^ mask_is_v4) {
|
|
ast_log(LOG_WARNING, "Address and mask are not using same address scheme.\n");
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
} else if (parse_cidr_mask(&ha->netmask, addr_is_v4, mask)) {
|
|
ast_log(LOG_WARNING, "Invalid CIDR netmask: %s\n", mask);
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
if (ast_sockaddr_apply_netmask(&ha->addr, &ha->netmask, &ha->addr)) {
|
|
/* This shouldn't happen because ast_sockaddr_parse would
|
|
* have failed much earlier on an unsupported address scheme
|
|
*/
|
|
char *failmask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask));
|
|
char *failaddr = ast_strdupa(ast_sockaddr_stringify(&ha->addr));
|
|
ast_log(LOG_WARNING, "Unable to apply netmask %s to address %s\n", failmask, failaddr);
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
if (prev) {
|
|
prev->next = ha;
|
|
} else {
|
|
ret = ha;
|
|
}
|
|
prev = ha;
|
|
|
|
parsed_addr = ast_strdupa(ast_sockaddr_stringify(&ha->addr));
|
|
parsed_mask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask));
|
|
|
|
ast_debug(3, "%s/%s sense %d appended to ACL\n", parsed_addr, parsed_mask, ha->sense);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ast_ha_join(const struct ast_ha *ha, struct ast_str **buf)
|
|
{
|
|
for (; ha; ha = ha->next) {
|
|
const char *addr = ast_strdupa(ast_sockaddr_stringify_addr(&ha->addr));
|
|
ast_str_append(buf, 0, "%s%s/%s",
|
|
ha->sense == AST_SENSE_ALLOW ? "!" : "",
|
|
addr, ast_sockaddr_stringify_addr(&ha->netmask));
|
|
if (ha->next) {
|
|
ast_str_append(buf, 0, ",");
|
|
}
|
|
}
|
|
}
|
|
|
|
enum ast_acl_sense ast_apply_acl(struct ast_acl_list *acl_list, const struct ast_sockaddr *addr, const char *purpose)
|
|
{
|
|
struct ast_acl *acl;
|
|
|
|
/* If the list is NULL, there are no rules, so we'll allow automatically. */
|
|
if (!acl_list) {
|
|
return AST_SENSE_ALLOW;
|
|
}
|
|
|
|
AST_LIST_LOCK(acl_list);
|
|
|
|
AST_LIST_TRAVERSE(acl_list, acl, list) {
|
|
if (acl->is_invalid) {
|
|
/* In this case, the baseline ACL shouldn't ever trigger this, but if that somehow happens, it'll still be shown. */
|
|
ast_log(LOG_WARNING, "%sRejecting '%s' due to use of an invalid ACL '%s'.\n", purpose ? purpose : "", ast_sockaddr_stringify_addr(addr),
|
|
ast_strlen_zero(acl->name) ? "(BASELINE)" : acl->name);
|
|
AST_LIST_UNLOCK(acl_list);
|
|
return AST_SENSE_DENY;
|
|
}
|
|
|
|
if (acl->acl) {
|
|
if (ast_apply_ha(acl->acl, addr) == AST_SENSE_DENY) {
|
|
ast_log(LOG_NOTICE, "%sRejecting '%s' due to a failure to pass ACL '%s'\n", purpose ? purpose : "", ast_sockaddr_stringify_addr(addr),
|
|
ast_strlen_zero(acl->name) ? "(BASELINE)" : acl->name);
|
|
AST_LIST_UNLOCK(acl_list);
|
|
return AST_SENSE_DENY;
|
|
}
|
|
}
|
|
}
|
|
|
|
AST_LIST_UNLOCK(acl_list);
|
|
|
|
return AST_SENSE_ALLOW;
|
|
}
|
|
|
|
enum ast_acl_sense ast_apply_ha(const struct ast_ha *ha, const struct ast_sockaddr *addr)
|
|
{
|
|
/* Start optimistic */
|
|
enum ast_acl_sense res = AST_SENSE_ALLOW;
|
|
const struct ast_ha *current_ha;
|
|
|
|
for (current_ha = ha; current_ha; current_ha = current_ha->next) {
|
|
struct ast_sockaddr result;
|
|
struct ast_sockaddr mapped_addr;
|
|
const struct ast_sockaddr *addr_to_use;
|
|
#if 0 /* debugging code */
|
|
char iabuf[INET_ADDRSTRLEN];
|
|
char iabuf2[INET_ADDRSTRLEN];
|
|
/* DEBUG */
|
|
ast_copy_string(iabuf, ast_inet_ntoa(sin->sin_addr), sizeof(iabuf));
|
|
ast_copy_string(iabuf2, ast_inet_ntoa(ha->netaddr), sizeof(iabuf2));
|
|
ast_debug(1, "##### Testing %s with %s\n", iabuf, iabuf2);
|
|
#endif
|
|
if (ast_sockaddr_is_ipv4(&ha->addr)) {
|
|
if (ast_sockaddr_is_ipv6(addr)) {
|
|
if (ast_sockaddr_is_ipv4_mapped(addr)) {
|
|
/* IPv4 ACLs apply to IPv4-mapped addresses */
|
|
if (!ast_sockaddr_ipv4_mapped(addr, &mapped_addr)) {
|
|
ast_log(LOG_ERROR, "%s provided to ast_sockaddr_ipv4_mapped could not be converted. That shouldn't be possible.\n",
|
|
ast_sockaddr_stringify(addr));
|
|
continue;
|
|
}
|
|
addr_to_use = &mapped_addr;
|
|
} else {
|
|
/* An IPv4 ACL does not apply to an IPv6 address */
|
|
continue;
|
|
}
|
|
} else {
|
|
/* Address is IPv4 and ACL is IPv4. No biggie */
|
|
addr_to_use = addr;
|
|
}
|
|
} else {
|
|
if (ast_sockaddr_is_ipv6(addr) && !ast_sockaddr_is_ipv4_mapped(addr)) {
|
|
addr_to_use = addr;
|
|
} else {
|
|
/* Address is IPv4 or IPv4 mapped but ACL is IPv6. Skip */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* For each rule, if this address and the netmask = the net address
|
|
apply the current rule */
|
|
if (ast_sockaddr_apply_netmask(addr_to_use, ¤t_ha->netmask, &result)) {
|
|
/* Unlikely to happen since we know the address to be IPv4 or IPv6 */
|
|
continue;
|
|
}
|
|
if (!ast_sockaddr_cmp_addr(&result, ¤t_ha->addr)) {
|
|
res = current_ha->sense;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int resolve_first(struct ast_sockaddr *addr, const char *name, int flag,
|
|
int family)
|
|
{
|
|
struct ast_sockaddr *addrs;
|
|
int addrs_cnt;
|
|
|
|
addrs_cnt = ast_sockaddr_resolve(&addrs, name, flag, family);
|
|
if (addrs_cnt > 0) {
|
|
if (addrs_cnt > 1) {
|
|
ast_debug(1, "Multiple addresses. Using the first only\n");
|
|
}
|
|
ast_sockaddr_copy(addr, &addrs[0]);
|
|
ast_free(addrs);
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unable to lookup '%s'\n", name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ast_get_ip_or_srv(struct ast_sockaddr *addr, const char *hostname, const char *service)
|
|
{
|
|
char srv[256];
|
|
char host[256];
|
|
int srv_ret = 0;
|
|
int tportno;
|
|
|
|
if (service) {
|
|
snprintf(srv, sizeof(srv), "%s.%s", service, hostname);
|
|
if ((srv_ret = ast_get_srv(NULL, host, sizeof(host), &tportno, srv)) > 0) {
|
|
hostname = host;
|
|
}
|
|
}
|
|
|
|
if (resolve_first(addr, hostname, PARSE_PORT_FORBID, addr->ss.ss_family) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (srv_ret > 0) {
|
|
ast_sockaddr_set_port(addr, tportno);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct dscp_codepoint {
|
|
char *name;
|
|
unsigned int space;
|
|
};
|
|
|
|
/* IANA registered DSCP codepoints */
|
|
|
|
static const struct dscp_codepoint dscp_pool1[] = {
|
|
{ "CS0", 0x00 },
|
|
{ "CS1", 0x08 },
|
|
{ "CS2", 0x10 },
|
|
{ "CS3", 0x18 },
|
|
{ "CS4", 0x20 },
|
|
{ "CS5", 0x28 },
|
|
{ "CS6", 0x30 },
|
|
{ "CS7", 0x38 },
|
|
{ "AF11", 0x0A },
|
|
{ "AF12", 0x0C },
|
|
{ "AF13", 0x0E },
|
|
{ "AF21", 0x12 },
|
|
{ "AF22", 0x14 },
|
|
{ "AF23", 0x16 },
|
|
{ "AF31", 0x1A },
|
|
{ "AF32", 0x1C },
|
|
{ "AF33", 0x1E },
|
|
{ "AF41", 0x22 },
|
|
{ "AF42", 0x24 },
|
|
{ "AF43", 0x26 },
|
|
{ "EF", 0x2E },
|
|
};
|
|
|
|
int ast_str2cos(const char *value, unsigned int *cos)
|
|
{
|
|
int fval;
|
|
|
|
if (sscanf(value, "%30d", &fval) == 1) {
|
|
if (fval < 8) {
|
|
*cos = fval;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int ast_str2tos(const char *value, unsigned int *tos)
|
|
{
|
|
int fval;
|
|
unsigned int x;
|
|
|
|
if (sscanf(value, "%30i", &fval) == 1) {
|
|
*tos = fval & 0xFF;
|
|
return 0;
|
|
}
|
|
|
|
for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) {
|
|
if (!strcasecmp(value, dscp_pool1[x].name)) {
|
|
*tos = dscp_pool1[x].space << 2;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
const char *ast_tos2str(unsigned int tos)
|
|
{
|
|
unsigned int x;
|
|
|
|
for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) {
|
|
if (dscp_pool1[x].space == (tos >> 2)) {
|
|
return dscp_pool1[x].name;
|
|
}
|
|
}
|
|
|
|
return "unknown";
|
|
}
|
|
|
|
int ast_get_ip(struct ast_sockaddr *addr, const char *hostname)
|
|
{
|
|
return ast_get_ip_or_srv(addr, hostname, NULL);
|
|
}
|
|
|
|
int ast_ouraddrfor(const struct ast_sockaddr *them, struct ast_sockaddr *us)
|
|
{
|
|
int port;
|
|
int s;
|
|
|
|
port = ast_sockaddr_port(us);
|
|
|
|
if ((s = socket(ast_sockaddr_is_ipv6(them) ? AF_INET6 : AF_INET,
|
|
SOCK_DGRAM, 0)) < 0) {
|
|
ast_log(LOG_ERROR, "Cannot create socket\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ast_connect(s, them)) {
|
|
ast_log(LOG_WARNING, "Cannot connect\n");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
if (ast_getsockname(s, us)) {
|
|
|
|
ast_log(LOG_WARNING, "Cannot get socket name\n");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
close(s);
|
|
|
|
{
|
|
const char *them_addr = ast_strdupa(ast_sockaddr_stringify_addr(them));
|
|
const char *us_addr = ast_strdupa(ast_sockaddr_stringify_addr(us));
|
|
|
|
ast_debug(3, "For destination '%s', our source address is '%s'.\n",
|
|
them_addr, us_addr);
|
|
}
|
|
|
|
ast_sockaddr_set_port(us, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ast_find_ourip(struct ast_sockaddr *ourip, const struct ast_sockaddr *bindaddr, int family)
|
|
{
|
|
char ourhost[MAXHOSTNAMELEN] = "";
|
|
struct ast_sockaddr root;
|
|
int res, port = ast_sockaddr_port(ourip);
|
|
|
|
/* just use the bind address if it is nonzero */
|
|
if (!ast_sockaddr_is_any(bindaddr)) {
|
|
ast_sockaddr_copy(ourip, bindaddr);
|
|
ast_debug(3, "Attached to given IP address\n");
|
|
return 0;
|
|
}
|
|
/* try to use our hostname */
|
|
if (gethostname(ourhost, sizeof(ourhost) - 1)) {
|
|
ast_log(LOG_WARNING, "Unable to get hostname\n");
|
|
} else {
|
|
if (resolve_first(ourip, ourhost, PARSE_PORT_FORBID, family) == 0) {
|
|
/* reset port since resolve_first wipes this out */
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return 0;
|
|
}
|
|
}
|
|
ast_debug(3, "Trying to check A.ROOT-SERVERS.NET and get our IP address for that connection\n");
|
|
/* A.ROOT-SERVERS.NET. */
|
|
if (!resolve_first(&root, "A.ROOT-SERVERS.NET", PARSE_PORT_FORBID, 0) &&
|
|
!ast_ouraddrfor(&root, ourip)) {
|
|
/* reset port since resolve_first wipes this out */
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return 0;
|
|
}
|
|
res = get_local_address(ourip);
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return res;
|
|
}
|
|
|