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123 lines
3.2 KiB
123 lines
3.2 KiB
/*
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* acl.c - Manage the ACL (Access Control List)
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*
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* Copyright (C) 2013 - 2015, Max Lv <max.c.lv@gmail.com>
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*
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* This file is part of the shadowsocks-libev.
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*
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* shadowsocks-libev is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* shadowsocks-libev is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with shadowsocks-libev; see the file COPYING. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <ipset/ipset.h>
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#include "utils.h"
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static struct ip_set acl_ipv4_set;
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static struct ip_set acl_ipv6_set;
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static void parse_addr_cidr(const char *str, char *host, int *cidr)
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{
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int ret = -1, n = 0;
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char *pch;
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pch = strchr(str, '/');
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while (pch != NULL) {
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n++;
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ret = pch - str;
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pch = strchr(pch + 1, '/');
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}
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if (ret == -1) {
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strcpy(host, str);
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*cidr = -1;
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} else {
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memcpy(host, str, ret);
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host[ret] = '\0';
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*cidr = atoi(str + ret + 1);
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}
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}
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int init_acl(const char *path)
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{
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// initialize ipset
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ipset_init_library();
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ipset_init(&acl_ipv4_set);
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ipset_init(&acl_ipv6_set);
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FILE *f = fopen(path, "r");
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if (f == NULL) {
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LOGE("Invalid acl path.");
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return -1;
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}
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char line[256];
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while (!feof(f)) {
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if (fgets(line, 256, f)) {
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// Trim the newline
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int len = strlen(line);
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if (len > 0 && line[len - 1] == '\n') {
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line[len - 1] = '\0';
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}
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char host[256];
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int cidr;
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parse_addr_cidr(line, host, &cidr);
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struct cork_ip addr;
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int err = cork_ip_init(&addr, host);
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if (!err) {
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if (addr.version == 4) {
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if (cidr >= 0) {
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ipset_ipv4_add_network(&acl_ipv4_set, &(addr.ip.v4), cidr);
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} else {
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ipset_ipv4_add(&acl_ipv4_set, &(addr.ip.v4));
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}
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} else if (addr.version == 6) {
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if (cidr >= 0) {
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ipset_ipv6_add_network(&acl_ipv6_set, &(addr.ip.v6), cidr);
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} else {
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ipset_ipv6_add(&acl_ipv6_set, &(addr.ip.v6));
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}
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}
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}
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}
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}
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fclose(f);
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return 0;
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}
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void free_acl(void)
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{
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ipset_done(&acl_ipv4_set);
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ipset_done(&acl_ipv6_set);
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}
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int acl_contains_ip(const char * host)
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{
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struct cork_ip addr;
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int err = cork_ip_init(&addr, host);
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if (err) {
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return 0;
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}
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if (addr.version == 4) {
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return ipset_contains_ipv4(&acl_ipv4_set, &(addr.ip.v4));
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} else if (addr.version == 6) {
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return ipset_contains_ipv6(&acl_ipv6_set, &(addr.ip.v6));
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}
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return 0;
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}
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