/* $NetBSD: sockaddr.c,v 1.10.2.1 2024/02/25 15:47:18 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ /*! \file */ #include #include #include #include #include #include #include #include #include #include bool isc_sockaddr_equal(const isc_sockaddr_t *a, const isc_sockaddr_t *b) { return (isc_sockaddr_compare(a, b, ISC_SOCKADDR_CMPADDR | ISC_SOCKADDR_CMPPORT | ISC_SOCKADDR_CMPSCOPE)); } bool isc_sockaddr_eqaddr(const isc_sockaddr_t *a, const isc_sockaddr_t *b) { return (isc_sockaddr_compare( a, b, ISC_SOCKADDR_CMPADDR | ISC_SOCKADDR_CMPSCOPE)); } bool isc_sockaddr_compare(const isc_sockaddr_t *a, const isc_sockaddr_t *b, unsigned int flags) { REQUIRE(a != NULL && b != NULL); if (a->length != b->length) { return (false); } /* * We don't just memcmp because the sin_zero field isn't always * zero. */ if (a->type.sa.sa_family != b->type.sa.sa_family) { return (false); } switch (a->type.sa.sa_family) { case AF_INET: if ((flags & ISC_SOCKADDR_CMPADDR) != 0 && memcmp(&a->type.sin.sin_addr, &b->type.sin.sin_addr, sizeof(a->type.sin.sin_addr)) != 0) { return (false); } if ((flags & ISC_SOCKADDR_CMPPORT) != 0 && a->type.sin.sin_port != b->type.sin.sin_port) { return (false); } break; case AF_INET6: if ((flags & ISC_SOCKADDR_CMPADDR) != 0 && memcmp(&a->type.sin6.sin6_addr, &b->type.sin6.sin6_addr, sizeof(a->type.sin6.sin6_addr)) != 0) { return (false); } /* * If ISC_SOCKADDR_CMPSCOPEZERO is set then don't return * false if one of the scopes in zero. */ if ((flags & ISC_SOCKADDR_CMPSCOPE) != 0 && a->type.sin6.sin6_scope_id != b->type.sin6.sin6_scope_id && ((flags & ISC_SOCKADDR_CMPSCOPEZERO) == 0 || (a->type.sin6.sin6_scope_id != 0 && b->type.sin6.sin6_scope_id != 0))) { return (false); } if ((flags & ISC_SOCKADDR_CMPPORT) != 0 && a->type.sin6.sin6_port != b->type.sin6.sin6_port) { return (false); } break; default: if (memcmp(&a->type, &b->type, a->length) != 0) { return (false); } } return (true); } bool isc_sockaddr_eqaddrprefix(const isc_sockaddr_t *a, const isc_sockaddr_t *b, unsigned int prefixlen) { isc_netaddr_t na, nb; isc_netaddr_fromsockaddr(&na, a); isc_netaddr_fromsockaddr(&nb, b); return (isc_netaddr_eqprefix(&na, &nb, prefixlen)); } isc_result_t isc_sockaddr_totext(const isc_sockaddr_t *sockaddr, isc_buffer_t *target) { isc_result_t result; isc_netaddr_t netaddr; char pbuf[sizeof("65000")]; unsigned int plen; isc_region_t avail; REQUIRE(sockaddr != NULL); /* * Do the port first, giving us the opportunity to check for * unsupported address families before calling * isc_netaddr_fromsockaddr(). */ switch (sockaddr->type.sa.sa_family) { case AF_INET: snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin.sin_port)); break; case AF_INET6: snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin6.sin6_port)); break; case AF_UNIX: plen = strlen(sockaddr->type.sunix.sun_path); if (plen >= isc_buffer_availablelength(target)) { return (ISC_R_NOSPACE); } isc_buffer_putmem( target, (const unsigned char *)sockaddr->type.sunix.sun_path, plen); /* * Null terminate after used region. */ isc_buffer_availableregion(target, &avail); INSIST(avail.length >= 1); avail.base[0] = '\0'; return (ISC_R_SUCCESS); default: return (ISC_R_FAILURE); } plen = strlen(pbuf); INSIST(plen < sizeof(pbuf)); isc_netaddr_fromsockaddr(&netaddr, sockaddr); result = isc_netaddr_totext(&netaddr, target); if (result != ISC_R_SUCCESS) { return (result); } if (1 + plen + 1 > isc_buffer_availablelength(target)) { return (ISC_R_NOSPACE); } isc_buffer_putmem(target, (const unsigned char *)"#", 1); isc_buffer_putmem(target, (const unsigned char *)pbuf, plen); /* * Null terminate after used region. */ isc_buffer_availableregion(target, &avail); INSIST(avail.length >= 1); avail.base[0] = '\0'; return (ISC_R_SUCCESS); } void isc_sockaddr_format(const isc_sockaddr_t *sa, char *array, unsigned int size) { isc_result_t result; isc_buffer_t buf; if (size == 0U) { return; } isc_buffer_init(&buf, array, size); result = isc_sockaddr_totext(sa, &buf); if (result != ISC_R_SUCCESS) { /* * The message is the same as in netaddr.c. */ snprintf(array, size, "", sa->type.sa.sa_family); array[size - 1] = '\0'; } } unsigned int isc_sockaddr_hash(const isc_sockaddr_t *sockaddr, bool address_only) { unsigned int length = 0; const unsigned char *s = NULL; unsigned int h = 0; unsigned int p = 0; const struct in6_addr *in6; REQUIRE(sockaddr != NULL); switch (sockaddr->type.sa.sa_family) { case AF_INET: s = (const unsigned char *)&sockaddr->type.sin.sin_addr; p = ntohs(sockaddr->type.sin.sin_port); length = sizeof(sockaddr->type.sin.sin_addr.s_addr); break; case AF_INET6: in6 = &sockaddr->type.sin6.sin6_addr; s = (const unsigned char *)in6; if (IN6_IS_ADDR_V4MAPPED(in6)) { s += 12; length = sizeof(sockaddr->type.sin.sin_addr.s_addr); } else { length = sizeof(sockaddr->type.sin6.sin6_addr); } p = ntohs(sockaddr->type.sin6.sin6_port); break; default: UNEXPECTED_ERROR("unknown address family: %d", (int)sockaddr->type.sa.sa_family); s = (const unsigned char *)&sockaddr->type; length = sockaddr->length; p = 0; } uint8_t buf[sizeof(struct sockaddr_storage) + sizeof(p)]; memmove(buf, s, length); if (!address_only) { memmove(buf + length, &p, sizeof(p)); h = isc_hash_function(buf, length + sizeof(p), true); } else { h = isc_hash_function(buf, length, true); } return (h); } void isc_sockaddr_any(isc_sockaddr_t *sockaddr) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin.sin_family = AF_INET; sockaddr->type.sin.sin_addr.s_addr = INADDR_ANY; sockaddr->type.sin.sin_port = 0; sockaddr->length = sizeof(sockaddr->type.sin); ISC_LINK_INIT(sockaddr, link); } void isc_sockaddr_any6(isc_sockaddr_t *sockaddr) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin6.sin6_family = AF_INET6; sockaddr->type.sin6.sin6_addr = in6addr_any; sockaddr->type.sin6.sin6_port = 0; sockaddr->length = sizeof(sockaddr->type.sin6); ISC_LINK_INIT(sockaddr, link); } void isc_sockaddr_fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina, in_port_t port) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin.sin_family = AF_INET; sockaddr->type.sin.sin_addr = *ina; sockaddr->type.sin.sin_port = htons(port); sockaddr->length = sizeof(sockaddr->type.sin); ISC_LINK_INIT(sockaddr, link); } void isc_sockaddr_anyofpf(isc_sockaddr_t *sockaddr, int pf) { switch (pf) { case AF_INET: isc_sockaddr_any(sockaddr); break; case AF_INET6: isc_sockaddr_any6(sockaddr); break; default: UNREACHABLE(); } } void isc_sockaddr_fromin6(isc_sockaddr_t *sockaddr, const struct in6_addr *ina6, in_port_t port) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin6.sin6_family = AF_INET6; sockaddr->type.sin6.sin6_addr = *ina6; sockaddr->type.sin6.sin6_port = htons(port); sockaddr->length = sizeof(sockaddr->type.sin6); ISC_LINK_INIT(sockaddr, link); } void isc_sockaddr_v6fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina, in_port_t port) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin6.sin6_family = AF_INET6; sockaddr->type.sin6.sin6_addr.s6_addr[10] = 0xff; sockaddr->type.sin6.sin6_addr.s6_addr[11] = 0xff; memmove(&sockaddr->type.sin6.sin6_addr.s6_addr[12], ina, 4); sockaddr->type.sin6.sin6_port = htons(port); sockaddr->length = sizeof(sockaddr->type.sin6); ISC_LINK_INIT(sockaddr, link); } int isc_sockaddr_pf(const isc_sockaddr_t *sockaddr) { /* * Get the protocol family of 'sockaddr'. */ #if (AF_INET == PF_INET && AF_INET6 == PF_INET6) /* * Assume that PF_xxx == AF_xxx for all AF and PF. */ return (sockaddr->type.sa.sa_family); #else /* if (AF_INET == PF_INET && AF_INET6 == PF_INET6) */ switch (sockaddr->type.sa.sa_family) { case AF_INET: return (PF_INET); case AF_INET6: return (PF_INET6); default: FATAL_ERROR("unknown address family: %d", (int)sockaddr->type.sa.sa_family); } #endif /* if (AF_INET == PF_INET && AF_INET6 == PF_INET6) */ } void isc_sockaddr_fromnetaddr(isc_sockaddr_t *sockaddr, const isc_netaddr_t *na, in_port_t port) { memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->type.sin.sin_family = na->family; switch (na->family) { case AF_INET: sockaddr->length = sizeof(sockaddr->type.sin); sockaddr->type.sin.sin_addr = na->type.in; sockaddr->type.sin.sin_port = htons(port); break; case AF_INET6: sockaddr->length = sizeof(sockaddr->type.sin6); memmove(&sockaddr->type.sin6.sin6_addr, &na->type.in6, 16); sockaddr->type.sin6.sin6_scope_id = isc_netaddr_getzone(na); sockaddr->type.sin6.sin6_port = htons(port); break; default: UNREACHABLE(); } ISC_LINK_INIT(sockaddr, link); } void isc_sockaddr_setport(isc_sockaddr_t *sockaddr, in_port_t port) { switch (sockaddr->type.sa.sa_family) { case AF_INET: sockaddr->type.sin.sin_port = htons(port); break; case AF_INET6: sockaddr->type.sin6.sin6_port = htons(port); break; default: FATAL_ERROR("unknown address family: %d", (int)sockaddr->type.sa.sa_family); } } in_port_t isc_sockaddr_getport(const isc_sockaddr_t *sockaddr) { in_port_t port = 0; switch (sockaddr->type.sa.sa_family) { case AF_INET: port = ntohs(sockaddr->type.sin.sin_port); break; case AF_INET6: port = ntohs(sockaddr->type.sin6.sin6_port); break; default: FATAL_ERROR("unknown address family: %d", (int)sockaddr->type.sa.sa_family); } return (port); } bool isc_sockaddr_ismulticast(const isc_sockaddr_t *sockaddr) { isc_netaddr_t netaddr; if (sockaddr->type.sa.sa_family == AF_INET || sockaddr->type.sa.sa_family == AF_INET6) { isc_netaddr_fromsockaddr(&netaddr, sockaddr); return (isc_netaddr_ismulticast(&netaddr)); } return (false); } bool isc_sockaddr_isexperimental(const isc_sockaddr_t *sockaddr) { isc_netaddr_t netaddr; if (sockaddr->type.sa.sa_family == AF_INET) { isc_netaddr_fromsockaddr(&netaddr, sockaddr); return (isc_netaddr_isexperimental(&netaddr)); } return (false); } bool isc_sockaddr_issitelocal(const isc_sockaddr_t *sockaddr) { isc_netaddr_t netaddr; if (sockaddr->type.sa.sa_family == AF_INET6) { isc_netaddr_fromsockaddr(&netaddr, sockaddr); return (isc_netaddr_issitelocal(&netaddr)); } return (false); } bool isc_sockaddr_islinklocal(const isc_sockaddr_t *sockaddr) { isc_netaddr_t netaddr; if (sockaddr->type.sa.sa_family == AF_INET6) { isc_netaddr_fromsockaddr(&netaddr, sockaddr); return (isc_netaddr_islinklocal(&netaddr)); } return (false); } bool isc_sockaddr_isnetzero(const isc_sockaddr_t *sockaddr) { isc_netaddr_t netaddr; if (sockaddr->type.sa.sa_family == AF_INET) { isc_netaddr_fromsockaddr(&netaddr, sockaddr); return (isc_netaddr_isnetzero(&netaddr)); } return (false); } isc_result_t isc_sockaddr_frompath(isc_sockaddr_t *sockaddr, const char *path) { if (strlen(path) >= sizeof(sockaddr->type.sunix.sun_path)) { return (ISC_R_NOSPACE); } memset(sockaddr, 0, sizeof(*sockaddr)); sockaddr->length = sizeof(sockaddr->type.sunix); sockaddr->type.sunix.sun_family = AF_UNIX; strlcpy(sockaddr->type.sunix.sun_path, path, sizeof(sockaddr->type.sunix.sun_path)); return (ISC_R_SUCCESS); } isc_result_t isc_sockaddr_fromsockaddr(isc_sockaddr_t *isa, const struct sockaddr *sa) { unsigned int length = 0; switch (sa->sa_family) { case AF_INET: length = sizeof(isa->type.sin); break; case AF_INET6: length = sizeof(isa->type.sin6); break; case AF_UNIX: length = sizeof(isa->type.sunix); break; default: return (ISC_R_NOTIMPLEMENTED); } memset(isa, 0, sizeof(isc_sockaddr_t)); memmove(isa, sa, length); isa->length = length; return (ISC_R_SUCCESS); }