11305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* $OpenBSD: addrmatch.c,v 1.5 2010/02/26 20:29:54 djm Exp $ */ 21305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 31305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 41305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Copyright (c) 2004-2008 Damien Miller <djm@mindrot.org> 51305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 61305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Permission to use, copy, modify, and distribute this software for any 71305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * purpose with or without fee is hereby granted, provided that the above 81305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * copyright notice and this permission notice appear in all copies. 91305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "includes.h" 201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/types.h> 221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/socket.h> 231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <netinet/in.h> 241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <arpa/inet.h> 251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <netdb.h> 271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <string.h> 281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdlib.h> 291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdio.h> 301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdarg.h> 311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "match.h" 331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "log.h" 341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "xmalloc.h" 351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstruct xaddr { 371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sa_family_t af; 381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood union { 391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct in_addr v4; 401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct in6_addr v6; 411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int8_t addr8[16]; 421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int32_t addr32[4]; 431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } xa; /* 128-bit address */ 441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int32_t scope_id; /* iface scope id for v6 */ 451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define v4 xa.v4 461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define v6 xa.v6 471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define addr8 xa.addr8 481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define addr32 xa.addr32 491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood}; 501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_unicast_masklen(int af) 531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (af) { 551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 32; 571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 128; 591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic inline int 651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodmasklen_valid(int af, u_int masklen) 661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (af) { 681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return masklen <= 32 ? 0 : -1; 701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return masklen <= 128 ? 0 : -1; 721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Convert struct sockaddr to struct xaddr 791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_sa_to_xaddr(struct sockaddr *sa, socklen_t slen, struct xaddr *xa) 831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct sockaddr_in *in4 = (struct sockaddr_in *)sa; 851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa; 861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(xa, '\0', sizeof(*xa)); 881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (sa->sa_family) { 901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (slen < sizeof(*in4)) 921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xa->af = AF_INET; 941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(&xa->v4, &in4->sin_addr, sizeof(xa->v4)); 951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (slen < sizeof(*in6)) 981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xa->af = AF_INET6; 1001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(&xa->v6, &in6->sin6_addr, sizeof(xa->v6)); 1011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID 1021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xa->scope_id = in6->sin6_scope_id; 1031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#endif 1041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 1051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 1061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 1081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 1131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Calculate a netmask of length 'l' for address family 'af' and 1141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * store it in 'n'. 1151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 1161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 1181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_netmask(int af, u_int l, struct xaddr *n) 1191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 1201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i; 1211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (masklen_valid(af, l) != 0 || n == NULL) 1231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(n, '\0', sizeof(*n)); 1261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (af) { 1271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 1281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->af = AF_INET; 1291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (l == 0) 1301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->v4.s_addr = htonl((0xffffffff << (32 - l)) & 0xffffffff); 1321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 1341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->af = AF_INET6; 1351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < 4 && l >= 32; i++, l -= 32) 1361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->addr32[i] = 0xffffffffU; 1371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (i < 4 && l != 0) 1381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->addr32[i] = htonl((0xffffffff << (32 - l)) & 1391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 0xffffffff); 1401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 1421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 1441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 1471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Perform logical AND of addresses 'a' and 'b', storing result in 'dst'. 1481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 1491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 1511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_and(struct xaddr *dst, const struct xaddr *a, const struct xaddr *b) 1521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 1531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i; 1541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (dst == NULL || a == NULL || b == NULL || a->af != b->af) 1561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(dst, a, sizeof(*dst)); 1591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (a->af) { 1601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 1611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood dst->v4.s_addr &= b->v4.s_addr; 1621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 1641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood dst->scope_id = a->scope_id; 1651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < 4; i++) 1661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood dst->addr32[i] &= b->addr32[i]; 1671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 1691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 1711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 1741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Compare addresses 'a' and 'b' 1751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Return 0 if addresses are identical, -1 if (a < b) or 1 if (a > b) 1761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 1781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_cmp(const struct xaddr *a, const struct xaddr *b) 1791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 1801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i; 1811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (a->af != b->af) 1831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return a->af == AF_INET6 ? 1 : -1; 1841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (a->af) { 1861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 1871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (a->v4.s_addr == b->v4.s_addr) 1881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ntohl(a->v4.s_addr) > ntohl(b->v4.s_addr) ? 1 : -1; 1901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 1911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < 16; i++) 1921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (a->addr8[i] - b->addr8[i] != 0) 1931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return a->addr8[i] > b->addr8[i] ? 1 : -1; 1941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (a->scope_id == b->scope_id) 1951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return a->scope_id > b->scope_id ? 1 : -1; 1971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 1981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 1991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 2031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Parse string address 'p' into 'n' 2041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 2051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 2061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_pton(const char *p, struct xaddr *n) 2081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct addrinfo hints, *ai; 2101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(&hints, '\0', sizeof(hints)); 2121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_flags = AI_NUMERICHOST; 2131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (p == NULL || getaddrinfo(p, NULL, &hints, &ai) != 0) 2151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ai == NULL || ai->ai_addr == NULL) 2181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (n != NULL && 2211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood addr_sa_to_xaddr(ai->ai_addr, ai->ai_addrlen, n) == -1) { 2221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood freeaddrinfo(ai); 2231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood freeaddrinfo(ai); 2271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 2281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 2311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Perform bitwise negation of address 2321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 2331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 2341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_invert(struct xaddr *n) 2361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i; 2381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (n == NULL) 2401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 2411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (n->af) { 2431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 2441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->v4.s_addr = ~n->v4.s_addr; 2451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (0); 2461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 2471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < 4; i++) 2481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood n->addr32[i] = ~n->addr32[i]; 2491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (0); 2501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 2511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 2521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 2561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Calculate a netmask of length 'l' for address family 'af' and 2571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * store it in 'n'. 2581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on success, -1 on failure. 2591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 2601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_hostmask(int af, u_int l, struct xaddr *n) 2621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_netmask(af, l, n) == -1 || addr_invert(n) == -1) 2641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 2651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (0); 2661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 2691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Test whether address 'a' is all zeros (i.e. 0.0.0.0 or ::) 2701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on if address is all-zeros, -1 if not all zeros or on failure. 2711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 2721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_is_all0s(const struct xaddr *a) 2741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i; 2761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (a->af) { 2781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 2791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (a->v4.s_addr == 0 ? 0 : -1); 2801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6:; 2811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < 4; i++) 2821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (a->addr32[i] != 0) 2831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 2841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (0); 2851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 2861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 2871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 2911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Test whether host portion of address 'a', as determined by 'masklen' 2921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * is all zeros. 2931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on if host portion of address is all-zeros, 2941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * -1 if not all zeros or on failure. 2951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 2961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_host_is_all0s(const struct xaddr *a, u_int masklen) 2981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct xaddr tmp_addr, tmp_mask, tmp_result; 3001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(&tmp_addr, a, sizeof(tmp_addr)); 3021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_hostmask(a->af, masklen, &tmp_mask) == -1) 3031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 3041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_and(&tmp_result, &tmp_addr, &tmp_mask) == -1) 3051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 3061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (addr_is_all0s(&tmp_result)); 3071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 3081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 3101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Parse a CIDR address (x.x.x.x/y or xxxx:yyyy::/z). 3111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Return -1 on parse error, -2 on inconsistency or 0 on success. 3121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 3131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 3141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_pton_cidr(const char *p, struct xaddr *n, u_int *l) 3151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 3161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct xaddr tmp; 3171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood long unsigned int masklen = 999; 3181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char addrbuf[64], *mp, *cp; 3191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Don't modify argument */ 3211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (p == NULL || strlcpy(addrbuf, p, sizeof(addrbuf)) > sizeof(addrbuf)) 3221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((mp = strchr(addrbuf, '/')) != NULL) { 3251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *mp = '\0'; 3261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood mp++; 3271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood masklen = strtoul(mp, &cp, 10); 3281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (*mp == '\0' || *cp != '\0' || masklen > 128) 3291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_pton(addrbuf, &tmp) == -1) 3331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (mp == NULL) 3361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood masklen = addr_unicast_masklen(tmp.af); 3371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (masklen_valid(tmp.af, masklen) == -1) 3381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -2; 3391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_host_is_all0s(&tmp, masklen) != 0) 3401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -2; 3411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (n != NULL) 3431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(n, &tmp, sizeof(*n)); 3441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (l != NULL) 3451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *l = masklen; 3461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 3481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 3491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 3511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_netmatch(const struct xaddr *host, const struct xaddr *net, u_int masklen) 3521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 3531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct xaddr tmp_mask, tmp_result; 3541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (host->af != net->af) 3561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_netmask(host->af, masklen, &tmp_mask) == -1) 3591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_and(&tmp_result, host, &tmp_mask) == -1) 3611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return addr_cmp(&tmp_result, net); 3631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 3641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 3661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Match "addr" against list pattern list "_list", which may contain a 3671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * mix of CIDR addresses and old-school wildcards. 3681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 3691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If addr is NULL, then no matching is performed, but _list is parsed 3701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * and checked for well-formedness. 3711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 3721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 1 on match found (never returned when addr == NULL). 3731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on if no match found, or no errors found when addr == NULL. 3741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns -1 on negated match found (never returned when addr == NULL). 3751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns -2 on invalid list entry. 3761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 3771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 3781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_match_list(const char *addr, const char *_list) 3791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 3801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *list, *cp, *o; 3811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct xaddr try_addr, match_addr; 3821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int masklen, neg; 3831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int ret = 0, r; 3841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr != NULL && addr_pton(addr, &try_addr) != 0) { 3861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug2("%s: couldn't parse address %.100s", __func__, addr); 3871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 3881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((o = list = strdup(_list)) == NULL) 3901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 3911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood while ((cp = strsep(&list, ",")) != NULL) { 3921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood neg = *cp == '!'; 3931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (neg) 3941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cp++; 3951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (*cp == '\0') { 3961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -2; 3971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 3981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Prefer CIDR address matching */ 4001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood r = addr_pton_cidr(cp, &match_addr, &masklen); 4011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (r == -2) { 4021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Inconsistent mask length for " 4031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "network \"%.100s\"", cp); 4041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -2; 4051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (r == 0) { 4071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr != NULL && addr_netmatch(&try_addr, 4081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &match_addr, masklen) == 0) { 4091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood foundit: 4101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (neg) { 4111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = 1; 4151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 4171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 4181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* If CIDR parse failed, try wildcard string match */ 4191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr != NULL && match_pattern(addr, cp) == 1) 4201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto foundit; 4211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(o); 4241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ret; 4261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 4271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 4291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Match "addr" against list CIDR list "_list". Lexical wildcards and 4301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * negation are not supported. If "addr" == NULL, will verify structure 4311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * of "_list". 4321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 4331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 1 on match found (never returned when addr == NULL). 4341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns 0 on if no match found, or no errors found when addr == NULL. 4351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Returns -1 on error 4361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 4371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 4381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodaddr_match_cidr_list(const char *addr, const char *_list) 4391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 4401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *list, *cp, *o; 4411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct xaddr try_addr, match_addr; 4421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int masklen; 4431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int ret = 0, r; 4441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr != NULL && addr_pton(addr, &try_addr) != 0) { 4461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug2("%s: couldn't parse address %.100s", __func__, addr); 4471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 4481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((o = list = strdup(_list)) == NULL) 4501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 4511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood while ((cp = strsep(&list, ",")) != NULL) { 4521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (*cp == '\0') { 4531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s: empty entry in list \"%.100s\"", 4541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood __func__, o); 4551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 4601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * NB. This function is called in pre-auth with untrusted data, 4611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * so be extra paranoid about junk reaching getaddrino (via 4621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * addr_pton_cidr). 4631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 4641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Stop junk from reaching getaddrinfo. +3 is for masklen */ 4661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (strlen(cp) > INET6_ADDRSTRLEN + 3) { 4671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s: list entry \"%.100s\" too long", 4681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood __func__, cp); 4691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define VALID_CIDR_CHARS "0123456789abcdefABCDEF.:/" 4731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (strspn(cp, VALID_CIDR_CHARS) != strlen(cp)) { 4741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s: list entry \"%.100s\" contains invalid " 4751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "characters", __func__, cp); 4761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Prefer CIDR address matching */ 4801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood r = addr_pton_cidr(cp, &match_addr, &masklen); 4811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (r == -1) { 4821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Invalid network entry \"%.100s\"", cp); 4831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (r == -2) { 4861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Inconsistent mask length for " 4871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "network \"%.100s\"", cp); 4881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = -1; 4891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (r == 0 && addr != NULL) { 4911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (addr_netmatch(&try_addr, &match_addr, 4921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood masklen) == 0) 4931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = 1; 4941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 4951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(o); 4981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ret; 5001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 501