From d9a2bc71693ea27461a78110005d5a2d8b0c6a50 Mon Sep 17 00:00:00 2001 From: "dtucker@openbsd.org" Date: Sat, 9 Jan 2021 11:58:50 +0000 Subject: upstream: Move address handling functions out into their own file in order to reuse them for per-source maxstartups limiting. Supplement with some additional functions from djm's flowtools that we'll also need. ok djm@ (as part of a larger diff). OpenBSD-Commit-ID: e3e7d9ccc6c9b82e25cfef0ec83598e8e2327cbf --- Makefile.in | 2 +- addr.c | 421 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ addr.h | 60 +++++++++ addrmatch.c | 331 +---------------------------------------------- 4 files changed, 484 insertions(+), 330 deletions(-) create mode 100644 addr.c create mode 100644 addr.h diff --git a/Makefile.in b/Makefile.in index dd386981..82321341 100644 --- a/Makefile.in +++ b/Makefile.in @@ -95,7 +95,7 @@ LIBSSH_OBJS=${LIBOPENSSH_OBJS} \ cipher-ctr.o cleanup.o \ compat.o fatal.o hostfile.o \ log.o match.o moduli.o nchan.o packet.o \ - readpass.o ttymodes.o xmalloc.o addrmatch.o \ + readpass.o ttymodes.o xmalloc.o addr.o addrmatch.o \ atomicio.o dispatch.o mac.o misc.o utf8.o \ monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-ecdsa-sk.o \ ssh-ed25519-sk.o ssh-rsa.o dh.o \ diff --git a/addr.c b/addr.c new file mode 100644 index 00000000..d9b1927e --- /dev/null +++ b/addr.c @@ -0,0 +1,421 @@ +/* $OpenBSD: addr.c,v 1.1 2021/01/09 11:58:50 dtucker Exp $ */ + +/* + * Copyright (c) 2004-2008 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "addr.h" + +#define _SA(x) ((struct sockaddr *)(x)) + +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; + } +} + +int +addr_xaddr_to_sa(const struct xaddr *xa, struct sockaddr *sa, socklen_t *len, + u_int16_t port) +{ + struct sockaddr_in *in4 = (struct sockaddr_in *)sa; + struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa; + + if (xa == NULL || sa == NULL || len == NULL) + return -1; + + switch (xa->af) { + case AF_INET: + if (*len < sizeof(*in4)) + return -1; + memset(sa, '\0', sizeof(*in4)); + *len = sizeof(*in4); +#ifdef SOCK_HAS_LEN + in4->sin_len = sizeof(*in4); +#endif + in4->sin_family = AF_INET; + in4->sin_port = htons(port); + memcpy(&in4->sin_addr, &xa->v4, sizeof(in4->sin_addr)); + break; + case AF_INET6: + if (*len < sizeof(*in6)) + return -1; + memset(sa, '\0', sizeof(*in6)); + *len = sizeof(*in6); +#ifdef SOCK_HAS_LEN + in6->sin6_len = sizeof(*in6); +#endif + in6->sin6_family = AF_INET6; + in6->sin6_port = htons(port); + memcpy(&in6->sin6_addr, &xa->v6, sizeof(in6->sin6_addr)); + in6->sin6_scope_id = xa->scope_id; + break; + default: + return -1; + } + return 0; +} + +/* + * Convert struct sockaddr to struct xaddr + * Returns 0 on success, -1 on failure. + */ +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; +} + +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. + */ +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; + } +} + +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; +} + +/* + * Perform logical AND of addresses 'a' and 'b', storing result in 'dst'. + * Returns 0 on success, -1 on failure. + */ +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; + } +} + +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: + /* + * Can't just subtract here as 255.255.255.255 - 0.0.0.0 is + * too big to fit into a signed int + */ + 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:; + /* + * Do this a byte at a time to avoid the above issue and + * any endian problems + */ + for (i = 0; i < 16; i++) + if (a->addr8[i] - b->addr8[i] != 0) + return (a->addr8[i] - b->addr8[i]); + if (a->scope_id == b->scope_id) + return (0); + return (a->scope_id > b->scope_id ? 1 : -1); + default: + return (-1); + } +} + +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. + */ +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 string address 'p' into 'n' + * Returns 0 on success, -1 on failure. + */ +int +addr_pton(const char *p, struct xaddr *n) +{ + struct addrinfo hints, *ai; + + memset(&hints, '\0', sizeof(hints)); + hints.ai_flags = AI_NUMERICHOST; + + if (p == NULL || getaddrinfo(p, NULL, &hints, &ai) != 0) + return -1; + + if (ai == NULL || ai->ai_addr == NULL) + return -1; + + if (n != NULL && addr_sa_to_xaddr(ai->ai_addr, ai->ai_addrlen, + n) == -1) { + freeaddrinfo(ai); + return -1; + } + + freeaddrinfo(ai); + return 0; +} + +int +addr_sa_pton(const char *h, const char *s, struct sockaddr *sa, socklen_t slen) +{ + struct addrinfo hints, *ai; + + memset(&hints, '\0', sizeof(hints)); + hints.ai_flags = AI_NUMERICHOST; + + if (h == NULL || getaddrinfo(h, s, &hints, &ai) != 0) + return -1; + + if (ai == NULL || ai->ai_addr == NULL) + return -1; + + if (sa != NULL) { + if (slen < ai->ai_addrlen) + return -1; + memcpy(sa, &ai->ai_addr, ai->ai_addrlen); + } + + freeaddrinfo(ai); + return 0; +} + +int +addr_ntop(const struct xaddr *n, char *p, size_t len) +{ + struct sockaddr_storage ss; + socklen_t slen = sizeof(ss); + + if (addr_xaddr_to_sa(n, _SA(&ss), &slen, 0) == -1) + return -1; + if (n == NULL || p == NULL || len == 0) + return -1; + if (getnameinfo(_SA(&ss), slen, p, len, NULL, 0, + NI_NUMERICHOST) == -1) + return -1; + + return 0; +} + +/* + * 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. + */ +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; +} + +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); +} diff --git a/addr.h b/addr.h new file mode 100644 index 00000000..5eff0262 --- /dev/null +++ b/addr.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2004,2005 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* Address handling routines */ + +#ifndef _ADDR_H +#define _ADDR_H + +#include +#include + +struct xaddr { + sa_family_t af; + union { + struct in_addr v4; + struct in6_addr v6; + u_int8_t addr8[16]; + u_int16_t addr16[8]; + 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 addr16 xa.addr16 +#define addr32 xa.addr32 +}; + +int addr_unicast_masklen(int af); +int addr_xaddr_to_sa(const struct xaddr *xa, struct sockaddr *sa, + socklen_t *len, u_int16_t port); +int addr_sa_to_xaddr(struct sockaddr *sa, socklen_t slen, struct xaddr *xa); +int addr_netmask(int af, u_int l, struct xaddr *n); +int addr_hostmask(int af, u_int l, struct xaddr *n); +int addr_invert(struct xaddr *n); +int addr_pton(const char *p, struct xaddr *n); +int addr_sa_pton(const char *h, const char *s, struct sockaddr *sa, + socklen_t slen); +int addr_pton_cidr(const char *p, struct xaddr *n, u_int *l); +int addr_ntop(const struct xaddr *n, char *p, size_t len); +int addr_and(struct xaddr *dst, const struct xaddr *a, const struct xaddr *b); +int addr_cmp(const struct xaddr *a, const struct xaddr *b); +int addr_is_all0s(const struct xaddr *n); +int addr_host_is_all0s(const struct xaddr *n, u_int masklen); +int addr_netmatch(const struct xaddr *host, const struct xaddr *net, + u_int masklen); +#endif /* _ADDR_H */ 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 @@ -29,337 +29,10 @@ #include #include +#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. -- cgit v1.2.3