diff options
Diffstat (limited to 'lib/isc/win32/net.c')
| -rw-r--r-- | lib/isc/win32/net.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/lib/isc/win32/net.c b/lib/isc/win32/net.c new file mode 100644 index 0000000..ea4656d --- /dev/null +++ b/lib/isc/win32/net.c @@ -0,0 +1,301 @@ +/* + * 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. + */ + +#include <errno.h> +#include <unistd.h> + +#include <isc/log.h> +#include <isc/net.h> +#include <isc/once.h> +#include <isc/strerr.h> +#include <isc/string.h> +#include <isc/util.h> + +/*% + * Definitions about UDP port range specification. This is a total mess of + * portability variants: some use sysctl (but the sysctl names vary), some use + * system-specific interfaces, some have the same interface for IPv4 and IPv6, + * some separate them, etc... + */ + +/*% + * The last resort defaults: use all non well known port space + */ +#ifndef ISC_NET_PORTRANGELOW +#define ISC_NET_PORTRANGELOW 32768 +#endif /* ISC_NET_PORTRANGELOW */ +#ifndef ISC_NET_PORTRANGEHIGH +#define ISC_NET_PORTRANGEHIGH 65535 +#endif /* ISC_NET_PORTRANGEHIGH */ + +static isc_once_t once = ISC_ONCE_INIT; +static isc_once_t once_ipv6only = ISC_ONCE_INIT; +static isc_once_t once_ipv6pktinfo = ISC_ONCE_INIT; +static isc_result_t ipv4_result = ISC_R_NOTFOUND; +static isc_result_t ipv6_result = ISC_R_NOTFOUND; +static isc_result_t ipv6only_result = ISC_R_NOTFOUND; +static isc_result_t ipv6pktinfo_result = ISC_R_NOTFOUND; + +void +InitSockets(void); + +static isc_result_t +try_proto(int domain) { + SOCKET s; + char strbuf[ISC_STRERRORSIZE]; + int errval; + + s = socket(domain, SOCK_STREAM, IPPROTO_TCP); + if (s == INVALID_SOCKET) { + errval = WSAGetLastError(); + switch (errval) { + case WSAEAFNOSUPPORT: + case WSAEPROTONOSUPPORT: + case WSAEINVAL: + return (ISC_R_NOTFOUND); + default: + strerror_r(errval, strbuf, sizeof(strbuf)); + UNEXPECTED_ERROR(__FILE__, __LINE__, + "socket() failed: %s", strbuf); + return (ISC_R_UNEXPECTED); + } + } + + closesocket(s); + + return (ISC_R_SUCCESS); +} + +static void +initialize_action(void) { + InitSockets(); + ipv4_result = try_proto(PF_INET); + ipv6_result = try_proto(PF_INET6); +} + +static void +initialize(void) { + RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS); +} + +isc_result_t +isc_net_probeipv4(void) { + initialize(); + return (ipv4_result); +} + +isc_result_t +isc_net_probeipv6(void) { + initialize(); + return (ipv6_result); +} + +isc_result_t +isc_net_probeunix(void) { + return (ISC_R_NOTFOUND); +} + +static void +try_ipv6only(void) { +#ifdef IPV6_V6ONLY + SOCKET s; + int on; + char strbuf[ISC_STRERRORSIZE]; +#endif /* ifdef IPV6_V6ONLY */ + isc_result_t result; + + result = isc_net_probeipv6(); + if (result != ISC_R_SUCCESS) { + ipv6only_result = result; + return; + } + +#ifndef IPV6_V6ONLY + ipv6only_result = ISC_R_NOTFOUND; + return; +#else /* ifndef IPV6_V6ONLY */ + /* check for TCP sockets */ + s = socket(PF_INET6, SOCK_STREAM, 0); + if (s == INVALID_SOCKET) { + strerror_r(errno, strbuf, sizeof(strbuf)); + UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s", + strbuf); + ipv6only_result = ISC_R_UNEXPECTED; + return; + } + + on = 1; + if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&on, + sizeof(on)) < 0) + { + ipv6only_result = ISC_R_NOTFOUND; + goto close; + } + + closesocket(s); + + /* check for UDP sockets */ + s = socket(PF_INET6, SOCK_DGRAM, 0); + if (s == INVALID_SOCKET) { + strerror_r(errno, strbuf, sizeof(strbuf)); + UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s", + strbuf); + ipv6only_result = ISC_R_UNEXPECTED; + return; + } + + on = 1; + if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&on, + sizeof(on)) < 0) + { + ipv6only_result = ISC_R_NOTFOUND; + goto close; + } + + ipv6only_result = ISC_R_SUCCESS; + +close: + closesocket(s); + return; +#endif /* IPV6_V6ONLY */ +} + +static void +initialize_ipv6only(void) { + RUNTIME_CHECK(isc_once_do(&once_ipv6only, try_ipv6only) == + ISC_R_SUCCESS); +} + +#ifdef __notyet__ +/* + * XXXMPA requires win32/socket.c to be updated to support + * WSASendMsg and WSARecvMsg which are themselves Winsock + * and compiler version dependent. + */ +static void +try_ipv6pktinfo(void) { + SOCKET s; + int on; + char strbuf[ISC_STRERRORSIZE]; + isc_result_t result; + int optname; + + result = isc_net_probeipv6(); + if (result != ISC_R_SUCCESS) { + ipv6pktinfo_result = result; + return; + } + + /* we only use this for UDP sockets */ + s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP); + if (s == INVALID_SOCKET) { + strerror_r(errno, strbuf, sizeof(strbuf)); + UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s", + strbuf); + ipv6pktinfo_result = ISC_R_UNEXPECTED; + return; + } + +#ifdef IPV6_RECVPKTINFO + optname = IPV6_RECVPKTINFO; +#else /* ifdef IPV6_RECVPKTINFO */ + optname = IPV6_PKTINFO; +#endif /* ifdef IPV6_RECVPKTINFO */ + on = 1; + if (setsockopt(s, IPPROTO_IPV6, optname, (const char *)&on, + sizeof(on)) < 0) + { + ipv6pktinfo_result = ISC_R_NOTFOUND; + goto close; + } + + ipv6pktinfo_result = ISC_R_SUCCESS; + +close: + closesocket(s); + return; +} + +static void +initialize_ipv6pktinfo(void) { + RUNTIME_CHECK(isc_once_do(&once_ipv6pktinfo, try_ipv6pktinfo) == + ISC_R_SUCCESS); +} +#endif /* __notyet__ */ + +isc_result_t +isc_net_probe_ipv6only(void) { + initialize_ipv6only(); + return (ipv6only_result); +} + +isc_result_t +isc_net_probe_ipv6pktinfo(void) { +#ifdef __notyet__ + initialize_ipv6pktinfo(); +#endif /* __notyet__ */ + return (ipv6pktinfo_result); +} + +isc_result_t +isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high) { + int result = ISC_R_FAILURE; + + REQUIRE(low != NULL && high != NULL); + + UNUSED(af); + + if (result != ISC_R_SUCCESS) { + *low = ISC_NET_PORTRANGELOW; + *high = ISC_NET_PORTRANGEHIGH; + } + + return (ISC_R_SUCCESS); /* we currently never fail in this function */ +} + +void +isc_net_disableipv4(void) { + initialize(); + if (ipv4_result == ISC_R_SUCCESS) { + ipv4_result = ISC_R_DISABLED; + } +} + +void +isc_net_disableipv6(void) { + initialize(); + if (ipv6_result == ISC_R_SUCCESS) { + ipv6_result = ISC_R_DISABLED; + } +} + +void +isc_net_enableipv4(void) { + initialize(); + if (ipv4_result == ISC_R_DISABLED) { + ipv4_result = ISC_R_SUCCESS; + } +} + +void +isc_net_enableipv6(void) { + initialize(); + if (ipv6_result == ISC_R_DISABLED) { + ipv6_result = ISC_R_SUCCESS; + } +} + +unsigned int +isc_net_probedscp(void) { + return (0); +} |