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-rw-r--r--addrmatch.c331
1 files changed, 2 insertions, 329 deletions
diff --git a/addrmatch.c b/addrmatch.c
index c86195d2..3215c653 100644
--- a/addrmatch.c
+++ b/addrmatch.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: addrmatch.c,v 1.15 2020/10/18 11:32:01 djm Exp $ */
+/* $OpenBSD: addrmatch.c,v 1.16 2021/01/09 11:58:50 dtucker Exp $ */
/*
* Copyright (c) 2004-2008 Damien Miller <djm@mindrot.org>
@@ -29,337 +29,10 @@
#include <stdio.h>
#include <stdarg.h>
+#include "addr.h"
#include "match.h"
#include "log.h"
-struct xaddr {
- sa_family_t af;
- union {
- struct in_addr v4;
- struct in6_addr v6;
- u_int8_t addr8[16];
- u_int32_t addr32[4];
- } xa; /* 128-bit address */
- u_int32_t scope_id; /* iface scope id for v6 */
-#define v4 xa.v4
-#define v6 xa.v6
-#define addr8 xa.addr8
-#define addr32 xa.addr32
-};
-
-static int
-addr_unicast_masklen(int af)
-{
- switch (af) {
- case AF_INET:
- return 32;
- case AF_INET6:
- return 128;
- default:
- return -1;
- }
-}
-
-static inline int
-masklen_valid(int af, u_int masklen)
-{
- switch (af) {
- case AF_INET:
- return masklen <= 32 ? 0 : -1;
- case AF_INET6:
- return masklen <= 128 ? 0 : -1;
- default:
- return -1;
- }
-}
-
-/*
- * Convert struct sockaddr to struct xaddr
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_sa_to_xaddr(struct sockaddr *sa, socklen_t slen, struct xaddr *xa)
-{
- struct sockaddr_in *in4 = (struct sockaddr_in *)sa;
- struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa;
-
- memset(xa, '\0', sizeof(*xa));
-
- switch (sa->sa_family) {
- case AF_INET:
- if (slen < (socklen_t)sizeof(*in4))
- return -1;
- xa->af = AF_INET;
- memcpy(&xa->v4, &in4->sin_addr, sizeof(xa->v4));
- break;
- case AF_INET6:
- if (slen < (socklen_t)sizeof(*in6))
- return -1;
- xa->af = AF_INET6;
- memcpy(&xa->v6, &in6->sin6_addr, sizeof(xa->v6));
-#ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
- xa->scope_id = in6->sin6_scope_id;
-#endif
- break;
- default:
- return -1;
- }
-
- return 0;
-}
-
-/*
- * Calculate a netmask of length 'l' for address family 'af' and
- * store it in 'n'.
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_netmask(int af, u_int l, struct xaddr *n)
-{
- int i;
-
- if (masklen_valid(af, l) != 0 || n == NULL)
- return -1;
-
- memset(n, '\0', sizeof(*n));
- switch (af) {
- case AF_INET:
- n->af = AF_INET;
- if (l == 0)
- return 0;
- n->v4.s_addr = htonl((0xffffffff << (32 - l)) & 0xffffffff);
- return 0;
- case AF_INET6:
- n->af = AF_INET6;
- for (i = 0; i < 4 && l >= 32; i++, l -= 32)
- n->addr32[i] = 0xffffffffU;
- if (i < 4 && l != 0)
- n->addr32[i] = htonl((0xffffffff << (32 - l)) &
- 0xffffffff);
- return 0;
- default:
- return -1;
- }
-}
-
-/*
- * Perform logical AND of addresses 'a' and 'b', storing result in 'dst'.
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_and(struct xaddr *dst, const struct xaddr *a, const struct xaddr *b)
-{
- int i;
-
- if (dst == NULL || a == NULL || b == NULL || a->af != b->af)
- return -1;
-
- memcpy(dst, a, sizeof(*dst));
- switch (a->af) {
- case AF_INET:
- dst->v4.s_addr &= b->v4.s_addr;
- return 0;
- case AF_INET6:
- dst->scope_id = a->scope_id;
- for (i = 0; i < 4; i++)
- dst->addr32[i] &= b->addr32[i];
- return 0;
- default:
- return -1;
- }
-}
-
-/*
- * Compare addresses 'a' and 'b'
- * Return 0 if addresses are identical, -1 if (a < b) or 1 if (a > b)
- */
-static int
-addr_cmp(const struct xaddr *a, const struct xaddr *b)
-{
- int i;
-
- if (a->af != b->af)
- return a->af == AF_INET6 ? 1 : -1;
-
- switch (a->af) {
- case AF_INET:
- if (a->v4.s_addr == b->v4.s_addr)
- return 0;
- return ntohl(a->v4.s_addr) > ntohl(b->v4.s_addr) ? 1 : -1;
- case AF_INET6:
- for (i = 0; i < 16; i++)
- if (a->addr8[i] - b->addr8[i] != 0)
- return a->addr8[i] > b->addr8[i] ? 1 : -1;
- if (a->scope_id == b->scope_id)
- return 0;
- return a->scope_id > b->scope_id ? 1 : -1;
- default:
- return -1;
- }
-}
-
-/*
- * Parse string address 'p' into 'n'
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_pton(const char *p, struct xaddr *n)
-{
- struct addrinfo hints, *ai = NULL;
- int ret = -1;
-
- memset(&hints, '\0', sizeof(hints));
- hints.ai_flags = AI_NUMERICHOST;
-
- if (p == NULL || getaddrinfo(p, NULL, &hints, &ai) != 0)
- goto out;
- if (ai == NULL || ai->ai_addr == NULL)
- goto out;
- if (n != NULL && addr_sa_to_xaddr(ai->ai_addr, ai->ai_addrlen, n) == -1)
- goto out;
- /* success */
- ret = 0;
- out:
- if (ai != NULL)
- freeaddrinfo(ai);
- return ret;
-}
-
-/*
- * Perform bitwise negation of address
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_invert(struct xaddr *n)
-{
- int i;
-
- if (n == NULL)
- return (-1);
-
- switch (n->af) {
- case AF_INET:
- n->v4.s_addr = ~n->v4.s_addr;
- return (0);
- case AF_INET6:
- for (i = 0; i < 4; i++)
- n->addr32[i] = ~n->addr32[i];
- return (0);
- default:
- return (-1);
- }
-}
-
-/*
- * Calculate a netmask of length 'l' for address family 'af' and
- * store it in 'n'.
- * Returns 0 on success, -1 on failure.
- */
-static int
-addr_hostmask(int af, u_int l, struct xaddr *n)
-{
- if (addr_netmask(af, l, n) == -1 || addr_invert(n) == -1)
- return (-1);
- return (0);
-}
-
-/*
- * Test whether address 'a' is all zeros (i.e. 0.0.0.0 or ::)
- * Returns 0 on if address is all-zeros, -1 if not all zeros or on failure.
- */
-static int
-addr_is_all0s(const struct xaddr *a)
-{
- int i;
-
- switch (a->af) {
- case AF_INET:
- return (a->v4.s_addr == 0 ? 0 : -1);
- case AF_INET6:;
- for (i = 0; i < 4; i++)
- if (a->addr32[i] != 0)
- return (-1);
- return (0);
- default:
- return (-1);
- }
-}
-
-/*
- * Test whether host portion of address 'a', as determined by 'masklen'
- * is all zeros.
- * Returns 0 on if host portion of address is all-zeros,
- * -1 if not all zeros or on failure.
- */
-static int
-addr_host_is_all0s(const struct xaddr *a, u_int masklen)
-{
- struct xaddr tmp_addr, tmp_mask, tmp_result;
-
- memcpy(&tmp_addr, a, sizeof(tmp_addr));
- if (addr_hostmask(a->af, masklen, &tmp_mask) == -1)
- return (-1);
- if (addr_and(&tmp_result, &tmp_addr, &tmp_mask) == -1)
- return (-1);
- return (addr_is_all0s(&tmp_result));
-}
-
-/*
- * Parse a CIDR address (x.x.x.x/y or xxxx:yyyy::/z).
- * Return -1 on parse error, -2 on inconsistency or 0 on success.
- */
-static int
-addr_pton_cidr(const char *p, struct xaddr *n, u_int *l)
-{
- struct xaddr tmp;
- long unsigned int masklen = 999;
- char addrbuf[64], *mp, *cp;
-
- /* Don't modify argument */
- if (p == NULL || strlcpy(addrbuf, p, sizeof(addrbuf)) >= sizeof(addrbuf))
- return -1;
-
- if ((mp = strchr(addrbuf, '/')) != NULL) {
- *mp = '\0';
- mp++;
- masklen = strtoul(mp, &cp, 10);
- if (*mp == '\0' || *cp != '\0' || masklen > 128)
- return -1;
- }
-
- if (addr_pton(addrbuf, &tmp) == -1)
- return -1;
-
- if (mp == NULL)
- masklen = addr_unicast_masklen(tmp.af);
- if (masklen_valid(tmp.af, masklen) == -1)
- return -2;
- if (addr_host_is_all0s(&tmp, masklen) != 0)
- return -2;
-
- if (n != NULL)
- memcpy(n, &tmp, sizeof(*n));
- if (l != NULL)
- *l = masklen;
-
- return 0;
-}
-
-static int
-addr_netmatch(const struct xaddr *host, const struct xaddr *net, u_int masklen)
-{
- struct xaddr tmp_mask, tmp_result;
-
- if (host->af != net->af)
- return -1;
-
- if (addr_netmask(host->af, masklen, &tmp_mask) == -1)
- return -1;
- if (addr_and(&tmp_result, host, &tmp_mask) == -1)
- return -1;
- return addr_cmp(&tmp_result, net);
-}
-
/*
* Match "addr" against list pattern list "_list", which may contain a
* mix of CIDR addresses and old-school wildcards.
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 12:17:08 +0000