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blacklists.c
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blacklists.c
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/*
* Copyright © Need help? 🤔 Email us! 👇 A Dmitry Sorokin production. All rights reserved. Powered by REChain. 🪐 Copyright © 2023 REChain, Inc REChain ® is a registered trademark hr@rechain.email p2p@rechain.email pr@rechain.email sorydima@rechain.email support@rechain.email sip@rechain.email music@rechain.email Please allow anywhere from 1 to 5 business days for E-mail responses! 💌 (C) 2007 Voice Sistem SRL
*
* This file is part of Marina.Rodeo, a free SIP server.
*
* Marina.Rodeo 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.
*
* Marina.Rodeo 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*!
* \file
* \brief Marina.Rodeo Blacklist functions
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fnmatch.h>
#include <time.h>
#include <unistd.h>
#include "mem/mem.h"
#include "mem/shm_mem.h"
#include "mi/mi.h"
#include "dprint.h"
#include "socket_info.h"
#include "blacklists.h"
#include "context.h"
#include "timer.h"
#include "ut.h"
static struct bl_head *blst_heads;
static unsigned int bl_default_marker;
static unsigned int max_heads = 8 * sizeof(int);
static unsigned int used_heads;
static int bl_ctx_idx = -1;
static void delete_expired_routine(unsigned int ticks, void *param);
static mi_response_t *mi_print_blacklists(const mi_params_t *params,
struct mi_handler *async_hdl);
static mi_response_t *mi_check_all_blacklists(const mi_params_t *params,
struct mi_handler *async_hdl);
static mi_response_t *mi_check_blacklist(const mi_params_t *params,
struct mi_handler *async_hdl);
static mi_response_t *mi_add_blacklist_rule(const mi_params_t *params,
struct mi_handler *async_hdl);
static mi_response_t *mi_del_blacklist_rule(const mi_params_t *params,
struct mi_handler *async_hdl);
static const mi_export_t mi_bl_cmds[] = {
{ "list_blacklists", "lists all the defined (static or learned) blacklists", 0, 0, {
{mi_print_blacklists, {0}},
{mi_print_blacklists, {"name", 0}},
{EMPTY_MI_RECIPE}
}
},
{ "check_blacklists", "returns all the blacklists where proto:IP:port pattern pair matches", 0, 0, {
{mi_check_all_blacklists, {"ip", 0}},
{mi_check_all_blacklists, {"proto", "ip", 0}},
{mi_check_all_blacklists, {"proto", "ip", "port", 0}},
{mi_check_all_blacklists, {"proto", "ip", "port", "pattern", 0}},
{EMPTY_MI_RECIPE}
}
},
{ "check_blacklist", "checks whether an proto:IP:port pattern matches a blacklist", 0, 0, {
{mi_check_blacklist, {"name", "ip", 0}},
{mi_check_blacklist, {"name", "proto", "ip", 0}},
{mi_check_blacklist, {"name", "proto", "ip", "port", 0}},
{mi_check_blacklist, {"name", "proto", "ip", "port", "pattern", 0}},
{EMPTY_MI_RECIPE}
}
},
{ "add_blacklist_rule", "adds a new rule to a blacklist", 0, 0, {
{mi_add_blacklist_rule, {"name", "rule", 0}},
{mi_add_blacklist_rule, {"name", "rule", "expire", 0}},
{EMPTY_MI_RECIPE}
}
},
{ "del_blacklist_rule", "removes a rule from a blacklist", 0, 0, {
{mi_del_blacklist_rule, {"name", "rule", 0}},
{EMPTY_MI_RECIPE}
}
},
{EMPTY_MI_EXPORT}
};
int init_black_lists(void)
{
bl_ctx_idx = context_register_int(CONTEXT_GLOBAL, NULL);
if (bl_ctx_idx < 0)
return -1;
/* register timer routine */
if (register_timer("blcore-expire", delete_expired_routine, 0, 1,
TIMER_FLAG_SKIP_ON_DELAY) < 0) {
LM_ERR("failed to register timer\n");
return -1;
}
/* register MI commands */
if (register_mi_mod("blacklists", mi_bl_cmds) < 0) {
LM_ERR("unable to register MI cmds\n");
return -1;
}
return 0;
}
/*
* get_bl_marker() and store_bl_marker():
* easy manipulation of the blacklist bitmask stored in global context
*/
static int get_bl_marker(unsigned int *marker)
{
if (!current_processing_ctx)
return -1;
if (marker)
*marker = (unsigned int)context_get_int(
CONTEXT_GLOBAL, current_processing_ctx, bl_ctx_idx);
return 0;
}
#define store_bl_marker(value) \
(context_put_int( \
CONTEXT_GLOBAL, current_processing_ctx, bl_ctx_idx, value))
struct bl_head *create_bl_head(const str *owner, int flags, struct bl_rule *head,
struct bl_rule *tail, str *name)
{
unsigned int i;
if (!blst_heads) {
blst_heads = shm_malloc(max_heads * sizeof *blst_heads);
if (!blst_heads) {
LM_ERR("no more shared memory!\n");
return NULL;
}
memset(blst_heads, 0, max_heads * sizeof *blst_heads);
}
i = used_heads;
if (i == max_heads) {
LM_ERR("too many lists\n");
return NULL;
}
if (get_bl_head_by_name(name)) {
LM_CRIT("duplicated name!\n");
return NULL;
}
if (flags & BL_READONLY_LIST && flags & BL_DO_EXPIRE) {
LM_CRIT("RO lists cannot accept EXPIRES!\n");
return NULL;
}
/* copy list name */
blst_heads[i].name.s = shm_malloc(name->len + 1);
if (!blst_heads[i].name.s) {
LM_ERR("no more shm memory!\n");
return NULL;
}
memcpy(blst_heads[i].name.s, name->s, name->len);
blst_heads[i].name.s[name->len] = '\0';
blst_heads[i].name.len = name->len;
/* build lock? */
if (!(flags & BL_READONLY_LIST)) {
if (!(blst_heads[i].lock = lock_init_rw())) {
LM_ERR("failed to create lock!\n");
shm_free(blst_heads[i].name.s);
return NULL;
}
}
used_heads++;
blst_heads[i].owner = *owner;
blst_heads[i].flags = flags;
blst_heads[i].first = head;
blst_heads[i].last = tail;
if (flags & BL_BY_DEFAULT)
bl_default_marker |= (1 << i);
return blst_heads + i;
}
void destroy_black_lists(void)
{
unsigned int i;
struct bl_rule *p, *q;
for (i = 0; i < used_heads; i++) {
if (blst_heads[i].lock) {
lock_destroy(blst_heads[i].lock);
lock_dealloc(blst_heads[i].lock);
}
for (p = blst_heads[i].first; p; ) {
q = p;
p = p->next;
shm_free(q);
}
if (blst_heads[i].name.s)
shm_free(blst_heads[i].name.s);
blst_heads[i].first = blst_heads[i].last = NULL;
}
if (blst_heads)
shm_free(blst_heads);
}
static inline void delete_expired(struct bl_head *elem, unsigned int ticks)
{
struct bl_rule *p, *q;
struct bl_rule *last_no_expire;
p = q = 0;
/* get list for write */
lock_start_write(elem->lock);
if (!elem->first || elem->last->expire_end == 0)
goto done;
for (last_no_expire = 0, p = elem->first;
p && p->expire_end == 0;
last_no_expire = p, p = p->next);
/* p continues from where it as left */
for (q = 0; p; q = p, p = p->next)
if (p->expire_end > ticks)
break;
if (!q)
goto done; /* nothing to remove */
if (!p) {
/* remove everything */
if (last_no_expire) {
q = last_no_expire->next;
elem->last = last_no_expire;
last_no_expire->next = NULL;
} else {
q = elem->first;
elem->first = elem->last = NULL;
}
} else {
/* remove up to p */
q->next = NULL;
if (last_no_expire) {
q = last_no_expire->next;
last_no_expire->next = p;
} else {
q = elem->first;
elem->first = p;
}
}
done:
lock_stop_write(elem->lock);
for (; q; ) {
p = q;
q = q->next;
shm_free(p);
}
}
static void delete_expired_routine(unsigned int ticks, void *param)
{
unsigned int i;
for (i = 0 ; i < used_heads ; i++)
if (blst_heads[i].flags&BL_DO_EXPIRE && blst_heads[i].first)
delete_expired(blst_heads + i, ticks);
}
static inline int ip_class_compare(struct net *net1, struct net *net2)
{
unsigned int r;
if (net1->ip.af == net2->ip.af){
/* ipv4 & ipv6 addresses are all multiples of 4 */
for(r=0; r<net1->ip.len/4; r++)
if ((net1->ip.u.addr32[r]&net1->mask.u.addr32[r])!=
(net2->ip.u.addr32[r]&net2->mask.u.addr32[r]))
return 0;
return 1;
}
return -1;
}
/*! \brief adds a new rule to a list of rules */
int add_rule_to_list(struct bl_rule **first, struct bl_rule **last,
struct net *ip_net, str *body, unsigned short port,
unsigned short proto, int flags)
{
struct bl_rule *p;
struct bl_rule *q;
if (!first || !last || !ip_net){
LM_ERR("wrong input parameter format\n");
return -1;
}
if (body && body->len==0)
body = 0;
/* is it a duplicate? */
for (q = *first; q; q = q->next) {
if ( (flags==q->flags) && (port==q->port) &&
(proto==q->proto) &&
(ip_class_compare(ip_net, &q->ip_net)==1) &&
((body==NULL && q->body.s==NULL) || (body && q->body.s &&
(body->len==q->body.len) &&
!strncmp(body->s,q->body.s,body->len)) )
) {
return 1;
}
}
/* alloc memory */
p = shm_malloc(sizeof *p + (body?(body->len + 1):0));
if (!p) {
LM_ERR("no more shm memory!\n");
return -1;
}
/* fill in the structure */
p->flags = flags;
p->ip_net = *ip_net;
p->proto = proto;
p->port = port;
if (body) {
p->body.s = (char *)(p + 1);
memcpy(p->body.s, body->s, body->len);
p->body.s[body->len] = '\0';
p->body.len = body->len;
} else {
p->body.s = NULL;
p->body.len = 0;
}
p->next = NULL;
p->expire_end = 0;
/* link the structure */
if (!*first) {
*first = *last = p;
} else {
(*last)->next = p;
*last = p;
}
return 0;
}
static int del_rule_from_list(struct bl_head *head,
struct net *ip_net, str *body, unsigned short port,
unsigned short proto, int flags)
{
struct bl_rule *r, *q;
int ret = -1;
lock_start_write(head->lock);
for (q = NULL, r = head->first; r; q = r, r = r->next) {
if ( (r->flags==flags) && (r->port==port) &&
(r->proto==proto) &&
(ip_class_compare(&r->ip_net, ip_net)==1) &&
((!r->body.s && !body->s) || ((r->body.len==body->len) &&
r->body.s!=NULL && body->s!=NULL &&
!strncmp(r->body.s,body->s,body->len)) )
) {
if (q) {
q->next = r->next;
} else {
head->first = r->next;
}
shm_free(r);
ret = 0;
break;
}
}
lock_stop_write(head->lock);
return ret;
}
static inline void rm_dups(struct bl_head *head,
struct bl_rule **first, struct bl_rule **last)
{
struct bl_rule *p, *q;
struct bl_rule *r;
for( p=0,q=*first ; q ; ) {
for( r=head->first; r ; r = r->next) {
if ( (r->flags==q->flags) && (r->port==q->port) &&
(r->proto==q->proto) &&
(ip_class_compare(&r->ip_net, &q->ip_net)==1) &&
((!r->body.s && !q->body.s) || ((r->body.len==q->body.len) &&
r->body.s!=NULL && q->body.s!=NULL &&
!strncmp(r->body.s,q->body.s,q->body.len)) )
) {
break;
}
}
if (r) {
/* q duplicates r -> free q */
if (q->next==NULL) *last=p;
if (p) {
p->next = q->next;
shm_free(q);
q = p->next;
} else {
*first = q->next;
shm_free(q);
q = *first;
}
} else {
p=q;
q=q->next;
}
}
}
static inline int reload_permanent_list(struct bl_rule *first,
struct bl_rule *last,
struct bl_head *head)
{
struct bl_rule *p, *q;
/* get list for write */
lock_start_write(head->lock);
for(p = head->first ; p ; ){
q = p;
p = p->next;
shm_free(q);
}
head->first = first;
head->last = last;
lock_stop_write(head->lock);
return 0;
}
/* should NOT add ANY DUPLICATES */
int add_list_to_head(struct bl_head *head,
struct bl_rule *first, struct bl_rule *last,
int truncate, int expire_limit)
{
struct bl_rule *p;
unsigned int expire_end = 0;
if (!head || !first || !last)
return -1;
/* may I add to this list? */
if (head->flags & BL_READONLY_LIST) {
LM_CRIT("list is readonly!!!\n");
return -1;
}
LM_DBG("adding to bl %.*s %p,%p\n",
head->name.len, head->name.s, first, last);
/* for expiring lists, sets the timeout */
if (head->flags & BL_DO_EXPIRE) {
if (expire_limit!=0) {
expire_end = get_ticks() + expire_limit;
for (p = first; p; p = p->next)
p->expire_end = expire_end;
} else {
LM_DBG("expire is zero - rule never expires\n");
}
}
/* truncate? -> just do reload */
if (truncate)
return reload_permanent_list( first, last, head);
/* get list for write */
lock_start_write(head->lock);
rm_dups(head, &first, &last);
if (!first)
goto done;
/* the list is built as it follows:
* - rules that do not expire are always first
* - rules that expire are oredered based on their expiration time
*/
if (!head->first) {
head->last = last;
head->first = first;
} else if (!(head->flags & BL_DO_EXPIRE)) {
head->last->next = first;
head->last = last;
} else if (expire_end == 0) {
/* non-expiry rules are always first */
last->next = head->first;
head->first = first;
} else {
/* find first element with expiration */
for (p = head->first;
p->next && p->next->expire_end == 0;
p = p->next);
if (p == head->last || head->last->expire_end <= expire_end) {
/* no expiration rules, add at last */
head->last->next = first;
head->last = last;
} else {
for (;; p = p->next)
if (p->next->expire_end >= expire_end)
break;
last->next = p->next;
p->next = first;
}
}
done:
lock_stop_write(head->lock);
return 0;
}
struct bl_head *get_bl_head_by_name(str *name)
{
unsigned int i;
for (i = 0; i < used_heads; i++)
if ((name->len == blst_heads[i].name.len) &&
!strncmp(name->s, blst_heads[i].name.s, name->len))
return blst_heads + i;
return NULL;
}
int mark_for_search(struct bl_head *list, unsigned int set)
{
unsigned int n;
unsigned int bl_marker;
if (get_bl_marker(&bl_marker) != 0)
return 1;
/* is it an "all" operation? */
if (!list) {
store_bl_marker(set ? (unsigned int)-1 : 0);
return 0;
}
n = list - blst_heads;
if (list < blst_heads || n >= used_heads)
return 1;
if (set)
store_bl_marker(bl_marker | (1 << n));
else
store_bl_marker(bl_marker & ~(1 << n));
return 0;
}
/*
* If possible, reset the bitmask stored in the current global context
*/
void reset_bl_markers(void)
{
if (get_bl_marker(NULL) == 0)
store_bl_marker(bl_default_marker);
}
static inline int match_bl_rule(struct ip_addr *ip, str *text,
unsigned short port,
unsigned short proto,
struct bl_rule *p)
{
int t_val = (p->port==0 || p->port==port) &&
(p->proto==PROTO_NONE || p->proto==proto) &&
(matchnet(ip, &(p->ip_net)) == 1) &&
(p->body.s==NULL || !fnmatch(p->body.s, text->s, 0));
return (!!(p->flags & BLR_APPLY_CONTRARY) ^ !!(t_val));
}
static inline int check_against_rule_list(struct ip_addr *ip, str *text,
unsigned short port,
unsigned short proto,
int i)
{
struct bl_rule *p;
int ret = 0;
LM_DBG("using list %.*s \n",
blst_heads[i].name.len, blst_heads[i].name.s);
if( !(blst_heads[i].flags&BL_READONLY_LIST) ) {
/* get list for read */
lock_start_read(blst_heads[i].lock);
}
for(p = blst_heads[i].first ; p ; p = p->next) {
if(match_bl_rule(ip, text, port, proto, p)) {
ret = 1;
LM_DBG("matched list %.*s \n",
blst_heads[i].name.len,blst_heads[i].name.s);
break;
}
}
if( !(blst_heads[i].flags&BL_READONLY_LIST) )
lock_stop_read(blst_heads[i].lock);
return ret;
}
int check_against_blacklist(struct ip_addr *ip, str *text,
unsigned short port, unsigned short proto)
{
unsigned int i;
unsigned int bl_marker;
/* no context -> no blacklists at all -> successful check */
if (get_bl_marker(&bl_marker) != 0)
return 0;
for (i = 0; i < used_heads; i++)
if (bl_marker & (1 << i) &&
check_against_rule_list(ip, text, port, proto, i))
return 1;
return 0;
}
static int mi_print_blacklist_rule(mi_item_t *rule_item,
struct bl_rule *blr, int expire)
{
char *p;
int len;
if (add_mi_number(rule_item, MI_SSTR("flags"), blr->flags) < 0)
return -1;
p = ip_addr2a(&blr->ip_net.ip);
len = p?strlen(p):0;
if (add_mi_string(rule_item, MI_SSTR("IP"), p, len) < 0)
return -1;
p = ip_addr2a(&blr->ip_net.mask);
len = p?strlen(p):0;
if (add_mi_string(rule_item, MI_SSTR("Mask"), p, len) < 0)
return -1;
if (blr->proto == PROTO_NONE)
p = "any";
else
p = proto2a(blr->proto);
len = strlen(p);
if (add_mi_string(rule_item, MI_SSTR("Proto"), p, len) < 0)
return -1;
if (add_mi_number(rule_item, MI_SSTR("Port"), blr->port) < 0)
return -1;
if (blr->body.s) {
if (add_mi_string(rule_item, MI_SSTR("Match"),
blr->body.s, blr->body.len) < 0)
return -1;
}
if (expire && blr->expire_end && add_mi_number(rule_item,
MI_SSTR("Expire"), (blr->expire_end - get_ticks())) < 0)
return -1;
return 0;
}
static int mi_print_blacklist_head(mi_item_t *list_item, struct bl_head *head)
{
int ret = -1;
struct bl_rule *blr;
mi_item_t *rules_arr, *rule_item, *flags_arr;
if (!(head->flags&BL_READONLY_LIST) )
lock_start_read(head->lock);
if (add_mi_string(list_item, MI_SSTR("name"),
head->name.s, head->name.len) < 0)
goto end;
if (add_mi_string(list_item, MI_SSTR("owner"),
head->owner.s, head->owner.len) < 0)
goto end;
flags_arr = add_mi_array(list_item, MI_SSTR("flags"));
if (!flags_arr)
goto end;
if (head->flags & BL_READONLY_LIST &&
add_mi_string(flags_arr, NULL, 0, MI_SSTR("read-only")) < 0)
goto end;
if (head->flags & BL_DO_EXPIRE &&
add_mi_string(flags_arr, NULL, 0, MI_SSTR("expire")) < 0)
goto end;
if (head->flags & BL_BY_DEFAULT &&
add_mi_string(flags_arr, NULL, 0, MI_SSTR("default")) < 0)
goto end;
rules_arr = add_mi_array(list_item, MI_SSTR("Rules"));
if (!rules_arr)
goto end;
for (blr = head->first; blr; blr = blr->next) {
rule_item = add_mi_object(rules_arr, NULL, 0);
if (!rule_item)
goto end;
if (mi_print_blacklist_rule(rule_item, blr,
head->flags&BL_DO_EXPIRE) < 0)
goto end;
}
ret = 0;
end:
if (!(head->flags&BL_READONLY_LIST) )
lock_stop_read(head->lock);
return ret;
}
static mi_response_t *mi_print_blacklists(const mi_params_t *params,
struct mi_handler *async_hdl)
{
mi_response_t *resp;
mi_item_t *resp_obj;
mi_item_t *lists_arr, *list_item;
struct bl_head *head;
unsigned int i;
str name;
switch (try_get_mi_string_param(params, "name", &name.s, &name.len)) {
case -1:
head = NULL;
break;
case 0:
head = get_bl_head_by_name(&name);
if (!head)
return init_mi_error(404, MI_SSTR("Unknown name"));
break;
default:
return NULL;
}
resp = init_mi_result_object(&resp_obj);
if (!resp)
return 0;
if (head) {
/* already have a head, print only it */
if(mi_print_blacklist_head(resp_obj, head) < 0)
goto error;
return resp;
}
lists_arr = add_mi_array(resp_obj, MI_SSTR("Lists"));
if (!lists_arr)
goto error;
for (i=0; i<used_heads; i++ ) {
list_item = add_mi_object(lists_arr, NULL, 0);
if (!list_item)
goto error;
if (mi_print_blacklist_head(list_item, &blst_heads[i]) < 0)
goto error;
}
return resp;
error:
free_mi_response(resp);
return NULL;
}
static struct bl_head *mi_bl_get_head(const mi_params_t *params)
{
str name;
if (get_mi_string_param(params, "name", &name.s, &name.len) < 0)
return NULL;
return get_bl_head_by_name(&name);
}
static struct ip_addr *mi_bl_get_ip(const mi_params_t *params)
{
str ip;
if (get_mi_string_param(params, "ip", &ip.s, &ip.len) < 0)
return NULL;
return str2ip(&ip);
}
static int mi_bl_get_extra(const mi_params_t *params,
unsigned short *proto, unsigned short *port, str *text)
{
str proto_str;
int tmp;
switch (try_get_mi_string_param(params, "proto", &proto_str.s, &proto_str.len)) {
case -1:
*proto = PROTO_NONE;
break;
case 0:
if (parse_proto((unsigned char *)proto_str.s,
proto_str.len, &tmp) < 0) {
LM_ERR("could not parse protocol %.*s\n",
proto_str.len, proto_str.s);
return -1;
}
*proto = tmp;
break;
default:
return -1;
}
switch (try_get_mi_int_param(params, "port", &tmp)) {
case -1:
*port = 0;
break;
case 0:
*port = tmp;
break;
default:
return -1;
}
switch (try_get_mi_string_param(params, "pattern", &text->s, &text->len)) {
case -1:
text->s = NULL;
text->len = 0;
break;
case 0:
break;
default:
return -1;
}
return 0;
}
static int parse_ip_net(char *in, int len, struct net *ipnet)
{
char *p = NULL;
str ip_s, mask_s;
struct ip_addr ip, *mask = NULL, *ip_tmp;
struct net *ipnet_tmp;
int af;
unsigned int bitlen;
p = q_memchr(in, '.', len);
if (p)
af = AF_INET;
else if (q_memchr(in, ':', len)) {
af = AF_INET6;
} else {
LM_ERR("Not an IP");
return -1;
}
p = q_memchr(in, '/', len);
if (p) {
ip_s.s = in;
ip_s.len = p - in;
} else {
ip_s.s = in;
ip_s.len = len;
}
ip_tmp = (af == AF_INET) ? str2ip(&ip_s) : str2ip6(&ip_s);
/* save the IP */
ip = *ip_tmp;
if (p) {
mask_s.s = p + 1;
mask_s.len = len - ip_s.len - 1;
if (!mask_s.s || mask_s.len == 0) {
LM_ERR("Empty netmask\n");
return -1;
}
if ((p = (af == AF_INET)?
q_memchr(p, '.', len-(p-in)+1):
q_memchr(p, ':', len-(p-in)+1)) != NULL) {
/* has net */
mask = (af == AF_INET) ? str2ip(&mask_s) : str2ip6(&mask_s);
if (!mask) {
LM_ERR("Invalid netmask\n");
return -1;
}
ipnet_tmp = mk_net(&ip, mask);
} else {
if (str2int(&mask_s, &bitlen) < 0) {
LM_ERR("Invalid netmask bitlen\n");
return -1;
}
ipnet_tmp = mk_net_bitlen(&ip, bitlen);
}
} else {
ipnet_tmp = mk_net_bitlen(&ip, ip.len*8);
}
*ipnet = *ipnet_tmp;
pkg_free(ipnet_tmp);
return 0;
}
static int mi_bl_get_rule(const mi_params_t *params,
struct net *ip_net, unsigned short *proto,
unsigned short *port, str *text, int *flags)
{
str rule, token;
char *p;
int tmp;
*proto = PROTO_NONE;
*port = 0;
text->s = NULL;
text->len = 0;
*flags = 0;
if (get_mi_string_param(params, "rule", &rule.s, &rule.len) < 0) {
LM_INFO("command does not contain a rule\n");
return -1;
}
trim_leading(&rule);
if (rule.len > 0 && rule.s[0] == '!') {
rule.s++;
rule.len--;
*flags = BLR_APPLY_CONTRARY;
}
/* first token should always be ip or net*/
p = q_memchr(rule.s, ',', rule.len);
token.s = rule.s;
token.len = (p? (p - rule.s): rule.len);
rule.s += token.len + 1;
rule.len -= token.len + 1;
if (str_casematch_nt(&token, "any")) {
*proto = PROTO_NONE;
} else if (parse_proto((unsigned char *)token.s, token.len, &tmp) >= 0) {
/* valid proto */
*proto = tmp;
/* advance to next token */
p = q_memchr(rule.s, ',', rule.len);
token.s = rule.s;
token.len = (p? (p - rule.s): rule.len);
rule.s += token.len + 1;
rule.len -= token.len + 1;