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-rw-r--r--lib/isc/win32/socket.c3965
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diff --git a/lib/isc/win32/socket.c b/lib/isc/win32/socket.c
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+/*
+ * 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.
+ */
+
+/* This code uses functions which are only available on Server 2003 and
+ * higher, and Windows XP and higher.
+ *
+ * This code is by nature multithreaded and takes advantage of various
+ * features to pass on information through the completion port for
+ * when I/O is completed. All sends, receives, accepts, and connects are
+ * completed through the completion port.
+ *
+ * The number of Completion Port Worker threads used is the total number
+ * of CPU's + 1. This increases the likelihood that a Worker Thread is
+ * available for processing a completed request.
+ *
+ * XXXPDM 5 August, 2002
+ */
+
+#define MAKE_EXTERNAL 1
+
+#include <sys/types.h>
+
+#ifndef _WINSOCKAPI_
+#define _WINSOCKAPI_ /* Prevent inclusion of winsock.h in windows.h */
+#endif /* ifndef _WINSOCKAPI_ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <io.h>
+#include <process.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <isc/app.h>
+#include <isc/buffer.h>
+#include <isc/condition.h>
+#include <isc/list.h>
+#include <isc/log.h>
+#include <isc/mem.h>
+#include <isc/mutex.h>
+#include <isc/net.h>
+#include <isc/once.h>
+#include <isc/os.h>
+#include <isc/platform.h>
+#include <isc/print.h>
+#include <isc/refcount.h>
+#include <isc/region.h>
+#include <isc/socket.h>
+#include <isc/stats.h>
+#include <isc/strerr.h>
+#include <isc/string.h>
+#include <isc/syslog.h>
+#include <isc/task.h>
+#include <isc/thread.h>
+#include <isc/util.h>
+#include <isc/win32os.h>
+
+/* clang-format off */
+/* U Can't Touch This */
+#include <mswsock.h>
+/* clang-format on */
+
+#ifdef HAVE_JSON_C
+#include <json_object.h>
+#endif /* HAVE_JSON_C */
+
+#ifdef HAVE_LIBXML2
+#include <libxml/xmlwriter.h>
+#define ISC_XMLCHAR (const xmlChar *)
+#endif /* HAVE_LIBXML2 */
+
+#include "errno2result.h"
+
+/*
+ * Set by the -T dscp option on the command line. If set to a value
+ * other than -1, we check to make sure DSCP values match it, and
+ * assert if not.
+ */
+LIBISC_EXTERNAL_DATA int isc_dscp_check_value = -1;
+
+/*
+ * How in the world can Microsoft exist with APIs like this?
+ * We can't actually call this directly, because it turns out
+ * no library exports this function. Instead, we need to
+ * issue a runtime call to get the address.
+ */
+LPFN_CONNECTEX ISCConnectEx;
+LPFN_ACCEPTEX ISCAcceptEx;
+LPFN_GETACCEPTEXSOCKADDRS ISCGetAcceptExSockaddrs;
+
+/*
+ * Run expensive internal consistency checks.
+ */
+#ifdef ISC_SOCKET_CONSISTENCY_CHECKS
+#define CONSISTENT(sock) consistent(sock)
+#else /* ifdef ISC_SOCKET_CONSISTENCY_CHECKS */
+#define CONSISTENT(sock) \
+ do { \
+ } while (0)
+#endif /* ifdef ISC_SOCKET_CONSISTENCY_CHECKS */
+static void
+consistent(isc_socket_t *sock);
+
+/*
+ * Define this macro to control the behavior of connection
+ * resets on UDP sockets. See Microsoft KnowledgeBase Article Q263823
+ * for details.
+ * NOTE: This requires that Windows 2000 systems install Service Pack 2
+ * or later.
+ */
+#ifndef SIO_UDP_CONNRESET
+#define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR, 12)
+#endif /* ifndef SIO_UDP_CONNRESET */
+
+/*
+ * Define what the possible "soft" errors can be. These are non-fatal returns
+ * of various network related functions, like recv() and so on.
+ */
+#define SOFT_ERROR(e) \
+ ((e) == WSAEINTR || (e) == WSAEWOULDBLOCK || (e) == EWOULDBLOCK || \
+ (e) == EINTR || (e) == EAGAIN || (e) == 0)
+
+/*
+ * Pending errors are not really errors and should be
+ * kept separate
+ */
+#define PENDING_ERROR(e) ((e) == WSA_IO_PENDING || (e) == 0)
+
+#define DOIO_SUCCESS 0 /* i/o ok, event sent */
+#define DOIO_SOFT 1 /* i/o ok, soft error, no event sent */
+#define DOIO_HARD 2 /* i/o error, event sent */
+#define DOIO_EOF 3 /* EOF, no event sent */
+#define DOIO_PENDING 4 /* status when i/o is in process */
+#define DOIO_NEEDMORE \
+ 5 /* IO was processed, but we need more due to minimum \
+ */
+
+#define DLVL(x) ISC_LOGCATEGORY_GENERAL, ISC_LOGMODULE_SOCKET, ISC_LOG_DEBUG(x)
+
+/*
+ * DLVL(90) -- Function entry/exit and other tracing.
+ * DLVL(70) -- Socket "correctness" -- including returning of events, etc.
+ * DLVL(60) -- Socket data send/receive
+ * DLVL(50) -- Event tracing, including receiving/sending completion events.
+ * DLVL(20) -- Socket creation/destruction.
+ */
+#define TRACE_LEVEL 90
+#define CORRECTNESS_LEVEL 70
+#define IOEVENT_LEVEL 60
+#define EVENT_LEVEL 50
+#define CREATION_LEVEL 20
+
+#define TRACE DLVL(TRACE_LEVEL)
+#define CORRECTNESS DLVL(CORRECTNESS_LEVEL)
+#define IOEVENT DLVL(IOEVENT_LEVEL)
+#define EVENT DLVL(EVENT_LEVEL)
+#define CREATION DLVL(CREATION_LEVEL)
+
+typedef isc_event_t intev_t;
+
+/*
+ * Socket State
+ */
+enum {
+ SOCK_INITIALIZED, /* Socket Initialized */
+ SOCK_OPEN, /* Socket opened but nothing yet to do */
+ SOCK_DATA, /* Socket sending or receiving data */
+ SOCK_LISTEN, /* TCP Socket listening for connects */
+ SOCK_ACCEPT, /* TCP socket is waiting to accept */
+ SOCK_CONNECT, /* TCP Socket connecting */
+ SOCK_CLOSED, /* Socket has been closed */
+};
+
+#define SOCKET_MAGIC ISC_MAGIC('I', 'O', 'i', 'o')
+#define VALID_SOCKET(t) ISC_MAGIC_VALID(t, SOCKET_MAGIC)
+
+/*
+ * IPv6 control information. If the socket is an IPv6 socket we want
+ * to collect the destination address and interface so the client can
+ * set them on outgoing packets.
+ */
+#ifndef USE_CMSG
+#define USE_CMSG 1
+#endif /* ifndef USE_CMSG */
+
+/*
+ * We really don't want to try and use these control messages. Win32
+ * doesn't have this mechanism before XP.
+ */
+#undef USE_CMSG
+
+/*
+ * Message header for recvmsg and sendmsg calls.
+ * Used value-result for recvmsg, value only for sendmsg.
+ */
+struct msghdr {
+ SOCKADDR_STORAGE to_addr; /* UDP send/recv address */
+ int to_addr_len; /* length of the address */
+ WSABUF *msg_iov; /* scatter/gather array */
+ u_int msg_iovlen; /* # elements in msg_iov */
+ void *msg_control; /* ancillary data, see below */
+ u_int msg_controllen; /* ancillary data buffer len */
+ u_int msg_totallen; /* total length of this message */
+} msghdr;
+
+/*
+ * The size to raise the receive buffer to.
+ */
+#define RCVBUFSIZE (32 * 1024)
+
+/*
+ * The number of times a send operation is repeated if the result
+ * is WSAEINTR.
+ */
+#define NRETRIES 10
+
+struct isc_socket {
+ /* Not locked. */
+ unsigned int magic;
+ isc_socketmgr_t *manager;
+ isc_mutex_t lock;
+ isc_sockettype_t type;
+
+ /* Pointers to scatter/gather buffers */
+ WSABUF iov[ISC_SOCKET_MAXSCATTERGATHER];
+
+ /* Locked by socket lock. */
+ ISC_LINK(isc_socket_t) link;
+ isc_refcount_t references; /* EXTERNAL references */
+ SOCKET fd; /* file handle */
+ int pf; /* protocol family */
+ char name[16];
+ void *tag;
+
+ /*
+ * Each recv() call uses this buffer. It is a per-socket receive
+ * buffer that allows us to decouple the system recv() from the
+ * recv_list done events. This means the items on the recv_list
+ * can be removed without having to cancel pending system recv()
+ * calls. It also allows us to read-ahead in some cases.
+ */
+ struct {
+ SOCKADDR_STORAGE from_addr; /* UDP send/recv address */
+ int from_addr_len; /* length of the address */
+ char *base; /* the base of the buffer */
+ char *consume_position; /* where to start
+ * copying data from
+ * next */
+ unsigned int len; /* the actual size of this buffer */
+ unsigned int remaining; /* the number of bytes
+ * remaining */
+ } recvbuf;
+
+ ISC_LIST(isc_socketevent_t) send_list;
+ ISC_LIST(isc_socketevent_t) recv_list;
+ ISC_LIST(isc_socket_newconnev_t) accept_list;
+ ISC_LIST(isc_socket_connev_t) connect_list;
+
+ isc_sockaddr_t address; /* remote address */
+
+ unsigned int listener : 1, /* listener socket */
+ connected : 1, pending_connect : 1, /* connect
+ * pending */
+ bound : 1, /* bound to local addr */
+ dupped : 1; /* created by isc_socket_dup() */
+ unsigned int pending_iocp; /* Should equal the counters below.
+ * Debug. */
+ unsigned int pending_recv; /* Number of outstanding recv() calls.
+ * */
+ unsigned int pending_send; /* Number of outstanding send() calls.
+ * */
+ unsigned int pending_accept; /* Number of outstanding accept()
+ * calls. */
+ unsigned int state; /* Socket state. Debugging and consistency
+ * checking.
+ */
+ int state_lineno; /* line which last touched state */
+};
+
+#define _set_state(sock, _state) \
+ do { \
+ (sock)->state = (_state); \
+ (sock)->state_lineno = __LINE__; \
+ } while (0)
+
+/*
+ * I/O Completion ports Info structures
+ */
+
+static HANDLE hHeapHandle = NULL;
+typedef struct IoCompletionInfo {
+ OVERLAPPED overlapped;
+ isc_socketevent_t *dev; /* send()/recv() done event */
+ isc_socket_connev_t *cdev; /* connect() done event */
+ isc_socket_newconnev_t *adev; /* accept() done event */
+ void *acceptbuffer;
+ DWORD received_bytes;
+ int request_type;
+ struct msghdr messagehdr;
+ void *buf;
+ unsigned int buflen;
+} IoCompletionInfo;
+
+/*
+ * Define a maximum number of I/O Completion Port worker threads
+ * to handle the load on the Completion Port. The actual number
+ * used is the number of CPU's + 1.
+ */
+#define MAX_IOCPTHREADS 20
+
+#define SOCKET_MANAGER_MAGIC ISC_MAGIC('I', 'O', 'm', 'g')
+#define VALID_MANAGER(m) ISC_MAGIC_VALID(m, SOCKET_MANAGER_MAGIC)
+
+struct isc_socketmgr {
+ /* Not locked. */
+ unsigned int magic;
+ isc_mem_t *mctx;
+ isc_mutex_t lock;
+ isc_stats_t *stats;
+
+ /* Locked by manager lock. */
+ ISC_LIST(isc_socket_t) socklist;
+ bool bShutdown;
+ isc_condition_t shutdown_ok;
+ HANDLE hIoCompletionPort;
+ int maxIOCPThreads;
+ HANDLE hIOCPThreads[MAX_IOCPTHREADS];
+ size_t maxudp;
+
+ /*
+ * Debugging.
+ * Modified by InterlockedIncrement() and InterlockedDecrement()
+ */
+ LONG totalSockets;
+ LONG iocp_total;
+};
+
+enum { SOCKET_RECV, SOCKET_SEND, SOCKET_ACCEPT, SOCKET_CONNECT };
+
+/*
+ * send() and recv() iovec counts
+ */
+#define MAXSCATTERGATHER_SEND (ISC_SOCKET_MAXSCATTERGATHER)
+#define MAXSCATTERGATHER_RECV (ISC_SOCKET_MAXSCATTERGATHER)
+
+static isc_result_t
+socket_create(isc_socketmgr_t *manager0, int pf, isc_sockettype_t type,
+ isc_socket_t **socketp, isc_socket_t *dup_socket);
+static isc_threadresult_t WINAPI
+SocketIoThread(LPVOID ThreadContext);
+static void
+maybe_free_socket(isc_socket_t **, int);
+static void
+free_socket(isc_socket_t **, int);
+static bool
+senddone_is_active(isc_socket_t *sock, isc_socketevent_t *dev);
+static bool
+acceptdone_is_active(isc_socket_t *sock, isc_socket_newconnev_t *dev);
+static bool
+connectdone_is_active(isc_socket_t *sock, isc_socket_connev_t *dev);
+static void
+send_recvdone_event(isc_socket_t *sock, isc_socketevent_t **dev);
+static void
+send_senddone_event(isc_socket_t *sock, isc_socketevent_t **dev);
+static void
+send_acceptdone_event(isc_socket_t *sock, isc_socket_newconnev_t **adev);
+static void
+send_connectdone_event(isc_socket_t *sock, isc_socket_connev_t **cdev);
+static void
+send_recvdone_abort(isc_socket_t *sock, isc_result_t result);
+static void
+send_connectdone_abort(isc_socket_t *sock, isc_result_t result);
+static void
+queue_receive_event(isc_socket_t *sock, isc_task_t *task,
+ isc_socketevent_t *dev);
+static void
+queue_receive_request(isc_socket_t *sock);
+
+/*
+ * This is used to dump the contents of the sock structure
+ * You should make sure that the sock is locked before
+ * dumping it. Since the code uses simple printf() statements
+ * it should only be used interactively.
+ */
+void
+sock_dump(isc_socket_t *sock) {
+ isc_socketevent_t *ldev;
+ isc_socket_newconnev_t *ndev;
+ isc_socket_connev_t *cdev;
+
+#if 0
+ isc_sockaddr_t addr;
+ char socktext[ISC_SOCKADDR_FORMATSIZE];
+ isc_result_t result;
+
+ result = isc_socket_getpeername(sock,&addr);
+ if (result == ISC_R_SUCCESS) {
+ isc_sockaddr_format(&addr,socktext,sizeof(socktext));
+ printf("Remote Socket: %s\n",socktext);
+ }
+ result = isc_socket_getsockname(sock,&addr);
+ if (result == ISC_R_SUCCESS) {
+ isc_sockaddr_format(&addr,socktext,sizeof(socktext));
+ printf("This Socket: %s\n",socktext);
+ }
+#endif /* if 0 */
+
+ printf("\n\t\tSock Dump\n");
+ printf("\t\tfd: %Iu\n", sock->fd);
+ printf("\t\treferences: %" PRIuFAST32 "\n",
+ isc_refcount_current(&sock->references));
+ printf("\t\tpending_accept: %u\n", sock->pending_accept);
+ printf("\t\tconnecting: %u\n", sock->pending_connect);
+ printf("\t\tconnected: %u\n", sock->connected);
+ printf("\t\tbound: %u\n", sock->bound);
+ printf("\t\tpending_iocp: %u\n", sock->pending_iocp);
+ printf("\t\tsocket type: %d\n", sock->type);
+
+ printf("\n\t\tSock Recv List\n");
+ ldev = ISC_LIST_HEAD(sock->recv_list);
+ while (ldev != NULL) {
+ printf("\t\tdev: %p\n", ldev);
+ ldev = ISC_LIST_NEXT(ldev, ev_link);
+ }
+
+ printf("\n\t\tSock Send List\n");
+ ldev = ISC_LIST_HEAD(sock->send_list);
+ while (ldev != NULL) {
+ printf("\t\tdev: %p\n", ldev);
+ ldev = ISC_LIST_NEXT(ldev, ev_link);
+ }
+
+ printf("\n\t\tSock Accept List\n");
+ ndev = ISC_LIST_HEAD(sock->accept_list);
+ while (ndev != NULL) {
+ printf("\t\tdev: %p\n", ldev);
+ ndev = ISC_LIST_NEXT(ndev, ev_link);
+ }
+
+ printf("\n\t\tSock Connect List\n");
+ cdev = ISC_LIST_HEAD(sock->connect_list);
+ while (cdev != NULL) {
+ printf("\t\tdev: %p\n", cdev);
+ cdev = ISC_LIST_NEXT(cdev, ev_link);
+ }
+}
+
+static void
+socket_log(int lineno, isc_socket_t *sock, const isc_sockaddr_t *address,
+ isc_logcategory_t *category, isc_logmodule_t *module, int level,
+ const char *fmt, ...) ISC_FORMAT_PRINTF(10, 11);
+
+/* This function will add an entry to the I/O completion port
+ * that will signal the I/O thread to exit (gracefully)
+ */
+static void
+signal_iocompletionport_exit(isc_socketmgr_t *manager) {
+ int i;
+ int errval;
+ char strbuf[ISC_STRERRORSIZE];
+
+ REQUIRE(VALID_MANAGER(manager));
+ for (i = 0; i < manager->maxIOCPThreads; i++) {
+ if (!PostQueuedCompletionStatus(manager->hIoCompletionPort, 0,
+ 0, 0))
+ {
+ errval = GetLastError();
+ strerror_r(errval, strbuf, sizeof(strbuf));
+ FATAL_ERROR(__FILE__, __LINE__,
+ "Can't request service thread to exit: %s",
+ strbuf);
+ }
+ }
+}
+
+/*
+ * Create the worker threads for the I/O Completion Port
+ */
+void
+iocompletionport_createthreads(int total_threads, isc_socketmgr_t *manager) {
+ int errval;
+ char strbuf[ISC_STRERRORSIZE];
+ int i;
+
+ INSIST(total_threads > 0);
+ REQUIRE(VALID_MANAGER(manager));
+ /*
+ * We need at least one
+ */
+ for (i = 0; i < total_threads; i++) {
+ isc_thread_create(SocketIoThread, manager,
+ &manager->hIOCPThreads[i]);
+ }
+}
+
+/*
+ * Create/initialise the I/O completion port
+ */
+void
+iocompletionport_init(isc_socketmgr_t *manager) {
+ int errval;
+ char strbuf[ISC_STRERRORSIZE];
+
+ REQUIRE(VALID_MANAGER(manager));
+ /*
+ * Create a private heap to handle the socket overlapped structure
+ * The minimum number of structures is 10, there is no maximum
+ */
+ hHeapHandle = HeapCreate(0, 10 * sizeof(IoCompletionInfo), 0);
+ if (hHeapHandle == NULL) {
+ errval = GetLastError();
+ strerror_r(errval, strbuf, sizeof(strbuf));
+ FATAL_ERROR(__FILE__, __LINE__,
+ "HeapCreate() failed during initialization: %s",
+ strbuf);
+ }
+
+ /* Now Create the Completion Port */
+ manager->hIoCompletionPort = CreateIoCompletionPort(
+ INVALID_HANDLE_VALUE, NULL, 0, manager->maxIOCPThreads);
+ if (manager->hIoCompletionPort == NULL) {
+ errval = GetLastError();
+ strerror_r(errval, strbuf, sizeof(strbuf));
+ FATAL_ERROR(__FILE__, __LINE__,
+ "CreateIoCompletionPort() failed during "
+ "initialization: %s",
+ strbuf);
+ }
+
+ /*
+ * Worker threads for servicing the I/O
+ */
+ iocompletionport_createthreads(manager->maxIOCPThreads, manager);
+}
+
+/*
+ * Associate a socket with an IO Completion Port. This allows us to queue
+ * events for it and have our worker pool of threads process them.
+ */
+void
+iocompletionport_update(isc_socket_t *sock) {
+ HANDLE hiocp;
+ char strbuf[ISC_STRERRORSIZE];
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ hiocp = CreateIoCompletionPort((HANDLE)sock->fd,
+ sock->manager->hIoCompletionPort,
+ (ULONG_PTR)sock, 0);
+
+ if (hiocp == NULL) {
+ DWORD errval = GetLastError();
+ strerror_r(errval, strbuf, sizeof(strbuf));
+ isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
+ ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
+ "iocompletionport_update: failed to open io "
+ "completion port: %s",
+ strbuf);
+
+ /* XXXMLG temporary hack to make failures detected.
+ * This function should return errors to the caller, not
+ * exit here.
+ */
+ FATAL_ERROR(__FILE__, __LINE__,
+ "CreateIoCompletionPort() failed during "
+ "initialization: %s",
+ strbuf);
+ }
+
+ InterlockedIncrement(&sock->manager->iocp_total);
+}
+
+/*
+ * Routine to cleanup and then close the socket.
+ * Only close the socket here if it is NOT associated
+ * with an event, otherwise the WSAWaitForMultipleEvents
+ * may fail due to the fact that the Wait should not
+ * be running while closing an event or a socket.
+ * The socket is locked before calling this function
+ */
+void
+socket_close(isc_socket_t *sock) {
+ REQUIRE(sock != NULL);
+
+ if (sock->fd != INVALID_SOCKET) {
+ closesocket(sock->fd);
+ sock->fd = INVALID_SOCKET;
+ _set_state(sock, SOCK_CLOSED);
+ InterlockedDecrement(&sock->manager->totalSockets);
+ }
+}
+
+static isc_once_t initialise_once = ISC_ONCE_INIT;
+static bool initialised = false;
+
+static void
+initialise(void) {
+ WORD wVersionRequested;
+ WSADATA wsaData;
+ int err;
+ SOCKET sock;
+ GUID GUIDConnectEx = WSAID_CONNECTEX;
+ GUID GUIDAcceptEx = WSAID_ACCEPTEX;
+ GUID GUIDGetAcceptExSockaddrs = WSAID_GETACCEPTEXSOCKADDRS;
+ DWORD dwBytes;
+
+ /* Need Winsock 2.2 or better */
+ wVersionRequested = MAKEWORD(2, 2);
+
+ err = WSAStartup(wVersionRequested, &wsaData);
+ if (err != 0) {
+ char strbuf[ISC_STRERRORSIZE];
+ strerror_r(err, strbuf, sizeof(strbuf));
+ FATAL_ERROR(__FILE__, __LINE__, "WSAStartup() failed: %s",
+ strbuf);
+ }
+ /*
+ * The following APIs do not exist as functions in a library, but
+ * we must ask winsock for them. They are "extensions" -- but why
+ * they cannot be actual functions is beyond me. So, ask winsock
+ * for the pointers to the functions we need.
+ */
+ sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ INSIST(sock != INVALID_SOCKET);
+ err = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &GUIDConnectEx,
+ sizeof(GUIDConnectEx), &ISCConnectEx,
+ sizeof(ISCConnectEx), &dwBytes, NULL, NULL);
+ INSIST(err == 0);
+
+ err = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &GUIDAcceptEx,
+ sizeof(GUIDAcceptEx), &ISCAcceptEx, sizeof(ISCAcceptEx),
+ &dwBytes, NULL, NULL);
+ INSIST(err == 0);
+
+ err = WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER,
+ &GUIDGetAcceptExSockaddrs,
+ sizeof(GUIDGetAcceptExSockaddrs),
+ &ISCGetAcceptExSockaddrs,
+ sizeof(ISCGetAcceptExSockaddrs), &dwBytes, NULL, NULL);
+ INSIST(err == 0);
+
+ closesocket(sock);
+
+ initialised = true;
+}
+
+/*
+ * Initialize socket services
+ */
+void
+InitSockets(void) {
+ RUNTIME_CHECK(isc_once_do(&initialise_once, initialise) ==
+ ISC_R_SUCCESS);
+ if (!initialised) {
+ exit(1);
+ }
+}
+
+int
+internal_sendmsg(isc_socket_t *sock, IoCompletionInfo *lpo,
+ struct msghdr *messagehdr, int flags, int *Error) {
+ int Result;
+ DWORD BytesSent;
+ DWORD Flags = flags;
+ int total_sent;
+
+ *Error = 0;
+ Result = WSASendTo(sock->fd, messagehdr->msg_iov,
+ messagehdr->msg_iovlen, &BytesSent, Flags,
+ (SOCKADDR *)&messagehdr->to_addr,
+ messagehdr->to_addr_len, (LPWSAOVERLAPPED)lpo, NULL);
+
+ total_sent = (int)BytesSent;
+
+ /* Check for errors.*/
+ if (Result == SOCKET_ERROR) {
+ *Error = WSAGetLastError();
+
+ switch (*Error) {
+ case WSA_IO_INCOMPLETE:
+ case WSA_WAIT_IO_COMPLETION:
+ case WSA_IO_PENDING:
+ case NO_ERROR: /* Strange, but okay */
+ sock->pending_iocp++;
+ sock->pending_send++;
+ break;
+
+ default:
+ return (-1);
+ break;
+ }
+ } else {
+ sock->pending_iocp++;
+ sock->pending_send++;
+ }
+
+ if (lpo != NULL) {
+ return (0);
+ } else {
+ return (total_sent);
+ }
+}
+
+static void
+queue_receive_request(isc_socket_t *sock) {
+ DWORD Flags = 0;
+ DWORD NumBytes = 0;
+ int Result;
+ int Error;
+ int need_retry;
+ WSABUF iov[1];
+ IoCompletionInfo *lpo = NULL;
+ isc_result_t isc_result;
+
+retry:
+ need_retry = false;
+
+ /*
+ * If we already have a receive pending, do nothing.
+ */
+ if (sock->pending_recv > 0) {
+ if (lpo != NULL) {
+ HeapFree(hHeapHandle, 0, lpo);
+ }
+ return;
+ }
+
+ /*
+ * If no one is waiting, do nothing.
+ */
+ if (ISC_LIST_EMPTY(sock->recv_list)) {
+ if (lpo != NULL) {
+ HeapFree(hHeapHandle, 0, lpo);
+ }
+ return;
+ }
+
+ INSIST(sock->recvbuf.remaining == 0);
+ INSIST(sock->fd != INVALID_SOCKET);
+
+ iov[0].len = sock->recvbuf.len;
+ iov[0].buf = sock->recvbuf.base;
+
+ if (lpo == NULL) {
+ lpo = (IoCompletionInfo *)HeapAlloc(hHeapHandle,
+ HEAP_ZERO_MEMORY,
+ sizeof(IoCompletionInfo));
+ RUNTIME_CHECK(lpo != NULL);
+ } else {
+ ZeroMemory(lpo, sizeof(IoCompletionInfo));
+ }
+ lpo->request_type = SOCKET_RECV;
+
+ sock->recvbuf.from_addr_len = sizeof(sock->recvbuf.from_addr);
+
+ Error = 0;
+ Result = WSARecvFrom((SOCKET)sock->fd, iov, 1, &NumBytes, &Flags,
+ (SOCKADDR *)&sock->recvbuf.from_addr,
+ &sock->recvbuf.from_addr_len, (LPWSAOVERLAPPED)lpo,
+ NULL);
+
+ /* Check for errors. */
+ if (Result == SOCKET_ERROR) {
+ Error = WSAGetLastError();
+
+ switch (Error) {
+ case WSA_IO_PENDING:
+ sock->pending_iocp++;
+ sock->pending_recv++;
+ break;
+
+ /* direct error: no completion event */
+ case ERROR_HOST_UNREACHABLE:
+ case WSAENETRESET:
+ case WSAECONNRESET:
+ if (!sock->connected) {
+ /* soft error */
+ need_retry = true;
+ break;
+ }
+ FALLTHROUGH;
+
+ default:
+ isc_result = isc__errno2result(Error);
+ if (isc_result == ISC_R_UNEXPECTED) {
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "WSARecvFrom: Windows error "
+ "code: %d, isc result %d",
+ Error, isc_result);
+ }
+ send_recvdone_abort(sock, isc_result);
+ HeapFree(hHeapHandle, 0, lpo);
+ lpo = NULL;
+ break;
+ }
+ } else {
+ /*
+ * The recv() finished immediately, but we will still get
+ * a completion event. Rather than duplicate code, let
+ * that thread handle sending the data along its way.
+ */
+ sock->pending_iocp++;
+ sock->pending_recv++;
+ }
+
+ socket_log(__LINE__, sock, NULL, IOEVENT,
+ "queue_io_request: fd %d result %d error %d", sock->fd,
+ Result, Error);
+
+ CONSISTENT(sock);
+
+ if (need_retry) {
+ goto retry;
+ }
+}
+
+static void
+manager_log(isc_socketmgr_t *sockmgr, isc_logcategory_t *category,
+ isc_logmodule_t *module, int level, const char *fmt, ...) {
+ char msgbuf[2048];
+ va_list ap;
+
+ if (!isc_log_wouldlog(isc_lctx, level)) {
+ return;
+ }
+
+ va_start(ap, fmt);
+ vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
+ va_end(ap);
+
+ isc_log_write(isc_lctx, category, module, level, "sockmgr %p: %s",
+ sockmgr, msgbuf);
+}
+
+static void
+socket_log(int lineno, isc_socket_t *sock, const isc_sockaddr_t *address,
+ isc_logcategory_t *category, isc_logmodule_t *module, int level,
+ const char *fmt, ...) {
+ char msgbuf[2048];
+ char peerbuf[256];
+ va_list ap;
+
+ if (!isc_log_wouldlog(isc_lctx, level)) {
+ return;
+ }
+
+ va_start(ap, fmt);
+ vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
+ va_end(ap);
+
+ if (address == NULL) {
+ isc_log_write(isc_lctx, category, module, level,
+ "socket %p line %d: %s", sock, lineno, msgbuf);
+ } else {
+ isc_sockaddr_format(address, peerbuf, sizeof(peerbuf));
+ isc_log_write(isc_lctx, category, module, level,
+ "socket %p line %d %s: %s", sock, lineno, peerbuf,
+ msgbuf);
+ }
+}
+
+/*
+ * Make an fd SOCKET non-blocking.
+ */
+static isc_result_t
+make_nonblock(SOCKET fd) {
+ int ret;
+ unsigned long flags = 1;
+ char strbuf[ISC_STRERRORSIZE];
+
+ /* Set the socket to non-blocking */
+ ret = ioctlsocket(fd, FIONBIO, &flags);
+
+ if (ret == -1) {
+ strerror_r(errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "ioctlsocket(%d, FIOBIO, %d): %s", fd, flags,
+ strbuf);
+
+ return (ISC_R_UNEXPECTED);
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * Windows 2000 systems incorrectly cause UDP sockets using WSARecvFrom
+ * to not work correctly, returning a WSACONNRESET error when a WSASendTo
+ * fails with an "ICMP port unreachable" response and preventing the
+ * socket from using the WSARecvFrom in subsequent operations.
+ * The function below fixes this, but requires that Windows 2000
+ * Service Pack 2 or later be installed on the system. NT 4.0
+ * systems are not affected by this and work correctly.
+ * See Microsoft Knowledge Base Article Q263823 for details of this.
+ */
+isc_result_t
+connection_reset_fix(SOCKET fd) {
+ DWORD dwBytesReturned = 0;
+ BOOL bNewBehavior = FALSE;
+ DWORD status;
+
+ if (isc_win32os_versioncheck(5, 0, 0, 0) < 0) {
+ return (ISC_R_SUCCESS); /* NT 4.0 has no problem */
+ }
+ /* disable bad behavior using IOCTL: SIO_UDP_CONNRESET */
+ status = WSAIoctl(fd, SIO_UDP_CONNRESET, &bNewBehavior,
+ sizeof(bNewBehavior), NULL, 0, &dwBytesReturned, NULL,
+ NULL);
+ if (status != SOCKET_ERROR) {
+ return (ISC_R_SUCCESS);
+ } else {
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "WSAIoctl(SIO_UDP_CONNRESET, oldBehaviour) "
+ "failed");
+ return (ISC_R_UNEXPECTED);
+ }
+}
+
+/*
+ * Construct an iov array and attach it to the msghdr passed in. This is
+ * the SEND constructor, which will use the used region of the buffer
+ * (if using a buffer list) or will use the internal region (if a single
+ * buffer I/O is requested).
+ *
+ * Nothing can be NULL, and the done event must list at least one buffer
+ * on the buffer linked list for this function to be meaningful.
+ */
+static void
+build_msghdr_send(isc_socket_t *sock, isc_socketevent_t *dev,
+ struct msghdr *msg, char *cmsg, WSABUF *iov,
+ IoCompletionInfo *lpo) {
+ unsigned int iovcount;
+ size_t write_count;
+
+ memset(msg, 0, sizeof(*msg));
+
+ memmove(&msg->to_addr, &dev->address.type, dev->address.length);
+ msg->to_addr_len = dev->address.length;
+
+ write_count = 0;
+ iovcount = 0;
+
+ /*
+ * Single buffer I/O? Skip what we've done so far in this region.
+ */
+ write_count = dev->region.length - dev->n;
+ lpo->buf = HeapAlloc(hHeapHandle, HEAP_ZERO_MEMORY, write_count);
+ RUNTIME_CHECK(lpo->buf != NULL);
+
+ socket_log(__LINE__, sock, NULL, TRACE, "alloc_buffer %p %d", lpo->buf,
+ write_count);
+
+ memmove(lpo->buf, (dev->region.base + dev->n), write_count);
+ lpo->buflen = (unsigned int)write_count;
+ iov[0].buf = lpo->buf;
+ iov[0].len = (u_long)write_count;
+ iovcount = 1;
+
+ msg->msg_iov = iov;
+ msg->msg_iovlen = iovcount;
+ msg->msg_totallen = (u_int)write_count;
+}
+
+static void
+set_dev_address(const isc_sockaddr_t *address, isc_socket_t *sock,
+ isc_socketevent_t *dev) {
+ if (sock->type == isc_sockettype_udp) {
+ if (address != NULL) {
+ dev->address = *address;
+ } else {
+ dev->address = sock->address;
+ }
+ } else if (sock->type == isc_sockettype_tcp) {
+ INSIST(address == NULL);
+ dev->address = sock->address;
+ }
+}
+
+static void
+destroy_socketevent(isc_event_t *event) {
+ isc_socketevent_t *ev = (isc_socketevent_t *)event;
+
+ (ev->destroy)(event);
+}
+
+static isc_socketevent_t *
+allocate_socketevent(isc_mem_t *mctx, isc_socket_t *sock,
+ isc_eventtype_t eventtype, isc_taskaction_t action,
+ void *arg) {
+ isc_socketevent_t *ev;
+
+ ev = (isc_socketevent_t *)isc_event_allocate(mctx, sock, eventtype,
+ action, arg, sizeof(*ev));
+
+ ev->result = ISC_R_IOERROR; /* XXXMLG temporary change to detect failure
+ */
+ /* to set */
+ ISC_LINK_INIT(ev, ev_link);
+ ev->region.base = NULL;
+ ev->n = 0;
+ ev->offset = 0;
+ ev->attributes = 0;
+ ev->destroy = ev->ev_destroy;
+ ev->ev_destroy = destroy_socketevent;
+ ev->dscp = 0;
+
+ return (ev);
+}
+
+#if defined(ISC_SOCKET_DEBUG)
+static void
+dump_msg(struct msghdr *msg, isc_socket_t *sock) {
+ unsigned int i;
+
+ printf("MSGHDR %p, Socket #: %Iu\n", msg, sock->fd);
+ printf("\tname %p, namelen %d\n", msg->msg_name, msg->msg_namelen);
+ printf("\tiov %p, iovlen %d\n", msg->msg_iov, msg->msg_iovlen);
+ for (i = 0; i < (unsigned int)msg->msg_iovlen; i++) {
+ printf("\t\t%u\tbase %p, len %u\n", i, msg->msg_iov[i].buf,
+ msg->msg_iov[i].len);
+ }
+}
+#endif /* if defined(ISC_SOCKET_DEBUG) */
+
+/*
+ * map the error code
+ */
+int
+map_socket_error(isc_socket_t *sock, int windows_errno, int *isc_errno,
+ char *errorstring, size_t bufsize) {
+ int doreturn;
+ switch (windows_errno) {
+ case WSAECONNREFUSED:
+ *isc_errno = ISC_R_CONNREFUSED;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAENETUNREACH:
+ case ERROR_NETWORK_UNREACHABLE:
+ *isc_errno = ISC_R_NETUNREACH;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case ERROR_PORT_UNREACHABLE:
+ case ERROR_HOST_UNREACHABLE:
+ case WSAEHOSTUNREACH:
+ *isc_errno = ISC_R_HOSTUNREACH;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAENETDOWN:
+ *isc_errno = ISC_R_NETDOWN;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAEHOSTDOWN:
+ *isc_errno = ISC_R_HOSTDOWN;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAEACCES:
+ *isc_errno = ISC_R_NOPERM;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAECONNRESET:
+ case WSAENETRESET:
+ case WSAECONNABORTED:
+ case WSAEDISCON:
+ *isc_errno = ISC_R_CONNECTIONRESET;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case WSAENOTCONN:
+ *isc_errno = ISC_R_NOTCONNECTED;
+ if (sock->connected) {
+ doreturn = DOIO_HARD;
+ } else {
+ doreturn = DOIO_SOFT;
+ }
+ break;
+ case ERROR_OPERATION_ABORTED:
+ case ERROR_CONNECTION_ABORTED:
+ case ERROR_REQUEST_ABORTED:
+ *isc_errno = ISC_R_CONNECTIONRESET;
+ doreturn = DOIO_HARD;
+ break;
+ case WSAENOBUFS:
+ *isc_errno = ISC_R_NORESOURCES;
+ doreturn = DOIO_HARD;
+ break;
+ case WSAEAFNOSUPPORT:
+ *isc_errno = ISC_R_FAMILYNOSUPPORT;
+ doreturn = DOIO_HARD;
+ break;
+ case WSAEADDRNOTAVAIL:
+ *isc_errno = ISC_R_ADDRNOTAVAIL;
+ doreturn = DOIO_HARD;
+ break;
+ case WSAEDESTADDRREQ:
+ *isc_errno = ISC_R_BADADDRESSFORM;
+ doreturn = DOIO_HARD;
+ break;
+ case ERROR_NETNAME_DELETED:
+ *isc_errno = ISC_R_NETDOWN;
+ doreturn = DOIO_HARD;
+ break;
+ default:
+ *isc_errno = ISC_R_IOERROR;
+ doreturn = DOIO_HARD;
+ break;
+ }
+ if (doreturn == DOIO_HARD) {
+ strerror_r(windows_errno, errorstring, bufsize);
+ }
+ return (doreturn);
+}
+
+static void
+fill_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
+ int copylen;
+
+ INSIST(dev->n < dev->minimum);
+ INSIST(sock->recvbuf.remaining > 0);
+ INSIST(sock->pending_recv == 0);
+
+ if (sock->type == isc_sockettype_udp) {
+ dev->address.length = sock->recvbuf.from_addr_len;
+ memmove(&dev->address.type, &sock->recvbuf.from_addr,
+ sock->recvbuf.from_addr_len);
+ if (isc_sockaddr_getport(&dev->address) == 0) {
+ if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) {
+ socket_log(__LINE__, sock, &dev->address,
+ IOEVENT,
+ "dropping source port zero packet");
+ }
+ sock->recvbuf.remaining = 0;
+ return;
+ }
+ /*
+ * Simulate a firewall blocking UDP responses bigger than
+ * 'maxudp' bytes.
+ */
+ if (sock->manager->maxudp != 0 &&
+ sock->recvbuf.remaining > sock->manager->maxudp)
+ {
+ sock->recvbuf.remaining = 0;
+ return;
+ }
+ } else if (sock->type == isc_sockettype_tcp) {
+ dev->address = sock->address;
+ }
+
+ copylen = min(dev->region.length - dev->n, sock->recvbuf.remaining);
+ memmove(dev->region.base + dev->n, sock->recvbuf.consume_position,
+ copylen);
+ sock->recvbuf.consume_position += copylen;
+ sock->recvbuf.remaining -= copylen;
+ dev->n += copylen;
+
+ /*
+ * UDP receives are all-consuming. That is, if we have 4k worth of
+ * data in our receive buffer, and the caller only gave us
+ * 1k of space, we will toss the remaining 3k of data. TCP
+ * will keep the extra data around and use it for later requests.
+ */
+ if (sock->type == isc_sockettype_udp) {
+ sock->recvbuf.remaining = 0;
+ }
+}
+
+/*
+ * Copy out as much data from the internal buffer to done events.
+ * As each done event is filled, send it along its way.
+ */
+static void
+completeio_recv(isc_socket_t *sock) {
+ isc_socketevent_t *dev;
+
+ /*
+ * If we are in the process of filling our buffer, we cannot
+ * touch it yet, so don't.
+ */
+ if (sock->pending_recv > 0) {
+ return;
+ }
+
+ while (sock->recvbuf.remaining > 0 && !ISC_LIST_EMPTY(sock->recv_list))
+ {
+ dev = ISC_LIST_HEAD(sock->recv_list);
+
+ /*
+ * See if we have sufficient data in our receive buffer
+ * to handle this. If we do, copy out the data.
+ */
+ fill_recv(sock, dev);
+
+ /*
+ * Did we satisfy it?
+ */
+ if (dev->n >= dev->minimum) {
+ dev->result = ISC_R_SUCCESS;
+ send_recvdone_event(sock, &dev);
+ }
+ }
+}
+
+/*
+ * Returns:
+ * DOIO_SUCCESS The operation succeeded. dev->result contains
+ * ISC_R_SUCCESS.
+ *
+ * DOIO_HARD A hard or unexpected I/O error was encountered.
+ * dev->result contains the appropriate error.
+ *
+ * DOIO_SOFT A soft I/O error was encountered. No senddone
+ * event was sent. The operation should be retried.
+ *
+ * No other return values are possible.
+ */
+static int
+completeio_send(isc_socket_t *sock, isc_socketevent_t *dev,
+ struct msghdr *messagehdr, int cc, int send_errno) {
+ char strbuf[ISC_STRERRORSIZE];
+
+ if (send_errno != 0) {
+ if (SOFT_ERROR(send_errno)) {
+ return (DOIO_SOFT);
+ }
+
+ return (map_socket_error(sock, send_errno, &dev->result, strbuf,
+ sizeof(strbuf)));
+ }
+
+ /*
+ * If we write less than we expected, update counters, poke.
+ */
+ dev->n += cc;
+ if (cc != messagehdr->msg_totallen) {
+ return (DOIO_SOFT);
+ }
+
+ /*
+ * Exactly what we wanted to write. We're done with this
+ * entry. Post its completion event.
+ */
+ dev->result = ISC_R_SUCCESS;
+ return (DOIO_SUCCESS);
+}
+
+static int
+startio_send(isc_socket_t *sock, isc_socketevent_t *dev, int *nbytes,
+ int *send_errno) {
+ char *cmsg = NULL;
+ char strbuf[ISC_STRERRORSIZE];
+ IoCompletionInfo *lpo;
+ int status;
+ struct msghdr *mh;
+
+ /*
+ * Simulate a firewall blocking UDP responses bigger than
+ * 'maxudp' bytes.
+ */
+ if (sock->type == isc_sockettype_udp && sock->manager->maxudp != 0 &&
+ dev->region.length - dev->n > sock->manager->maxudp)
+ {
+ *nbytes = dev->region.length - dev->n;
+ return (DOIO_SUCCESS);
+ }
+
+ lpo = (IoCompletionInfo *)HeapAlloc(hHeapHandle, HEAP_ZERO_MEMORY,
+ sizeof(IoCompletionInfo));
+ RUNTIME_CHECK(lpo != NULL);
+ lpo->request_type = SOCKET_SEND;
+ lpo->dev = dev;
+ mh = &lpo->messagehdr;
+ memset(mh, 0, sizeof(struct msghdr));
+
+ build_msghdr_send(sock, dev, mh, cmsg, sock->iov, lpo);
+
+ *nbytes = internal_sendmsg(sock, lpo, mh, 0, send_errno);
+
+ if (*nbytes <= 0) {
+ /*
+ * I/O has been initiated
+ * completion will be through the completion port
+ */
+ if (PENDING_ERROR(*send_errno)) {
+ status = DOIO_PENDING;
+ goto done;
+ }
+
+ if (SOFT_ERROR(*send_errno)) {
+ status = DOIO_SOFT;
+ goto done;
+ }
+
+ /*
+ * If we got this far then something is wrong
+ */
+ if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) {
+ strerror_r(*send_errno, strbuf, sizeof(strbuf));
+ socket_log(__LINE__, sock, NULL, IOEVENT,
+ "startio_send: internal_sendmsg(%d) %d "
+ "bytes, err %d/%s",
+ sock->fd, *nbytes, *send_errno, strbuf);
+ }
+ status = DOIO_HARD;
+ goto done;
+ }
+ dev->result = ISC_R_SUCCESS;
+ status = DOIO_SOFT;
+done:
+ _set_state(sock, SOCK_DATA);
+ return (status);
+}
+
+static void
+use_min_mtu(isc_socket_t *sock) {
+#ifdef IPV6_USE_MIN_MTU
+ /* use minimum MTU */
+ if (sock->pf == AF_INET6) {
+ int on = 1;
+ (void)setsockopt(sock->fd, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
+ (void *)&on, sizeof(on));
+ }
+#else /* ifdef IPV6_USE_MIN_MTU */
+ UNUSED(sock);
+#endif /* ifdef IPV6_USE_MIN_MTU */
+}
+
+static isc_result_t
+allocate_socket(isc_socketmgr_t *manager, isc_sockettype_t type,
+ isc_socket_t **socketp) {
+ isc_socket_t *sock;
+
+ sock = isc_mem_get(manager->mctx, sizeof(*sock));
+
+ sock->magic = 0;
+ isc_refcount_init(&sock->references, 0);
+
+ sock->manager = manager;
+ sock->type = type;
+ sock->fd = INVALID_SOCKET;
+
+ ISC_LINK_INIT(sock, link);
+
+ /*
+ * Set up list of readers and writers to be initially empty.
+ */
+ ISC_LIST_INIT(sock->recv_list);
+ ISC_LIST_INIT(sock->send_list);
+ ISC_LIST_INIT(sock->accept_list);
+ ISC_LIST_INIT(sock->connect_list);
+ sock->pending_accept = 0;
+ sock->pending_recv = 0;
+ sock->pending_send = 0;
+ sock->pending_iocp = 0;
+ sock->listener = 0;
+ sock->connected = 0;
+ sock->pending_connect = 0;
+ sock->bound = 0;
+ sock->dupped = 0;
+ memset(sock->name, 0, sizeof(sock->name)); /* zero the name field */
+ _set_state(sock, SOCK_INITIALIZED);
+
+ sock->recvbuf.len = 65536;
+ sock->recvbuf.consume_position = sock->recvbuf.base;
+ sock->recvbuf.remaining = 0;
+ sock->recvbuf.base = isc_mem_get(manager->mctx,
+ sock->recvbuf.len); /* max buffer */
+ /* size */
+
+ /*
+ * Initialize the lock.
+ */
+ isc_mutex_init(&sock->lock);
+
+ socket_log(__LINE__, sock, NULL, EVENT, "allocated");
+
+ sock->magic = SOCKET_MAGIC;
+ *socketp = sock;
+
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * Verify that the socket state is consistent.
+ */
+static void
+consistent(isc_socket_t *sock) {
+ isc_socketevent_t *dev;
+ isc_socket_newconnev_t *nev;
+ unsigned int count;
+ char *crash_reason;
+ bool crash = false;
+
+ REQUIRE(sock->pending_iocp == sock->pending_recv + sock->pending_send +
+ sock->pending_accept +
+ sock->pending_connect);
+
+ dev = ISC_LIST_HEAD(sock->send_list);
+ count = 0;
+ while (dev != NULL) {
+ count++;
+ dev = ISC_LIST_NEXT(dev, ev_link);
+ }
+ if (count > sock->pending_send) {
+ crash = true;
+ crash_reason = "send_list > sock->pending_send";
+ }
+
+ nev = ISC_LIST_HEAD(sock->accept_list);
+ count = 0;
+ while (nev != NULL) {
+ count++;
+ nev = ISC_LIST_NEXT(nev, ev_link);
+ }
+ if (count > sock->pending_accept) {
+ crash = true;
+ crash_reason = "accept_list > sock->pending_accept";
+ }
+
+ if (crash) {
+ socket_log(__LINE__, sock, NULL, CREATION,
+ "SOCKET INCONSISTENT: %s", crash_reason);
+ sock_dump(sock);
+ INSIST(!crash);
+ }
+}
+
+/*
+ * Maybe free the socket.
+ *
+ * This function will verify that the socket is no longer in use in any way,
+ * either internally or externally. This is the only place where this
+ * check is to be made; if some bit of code believes that IT is done with
+ * the socket (e.g., some reference counter reaches zero), it should call
+ * this function.
+ *
+ * When calling this function, the socket must be locked, and the manager
+ * must be unlocked.
+ *
+ * When this function returns, *socketp will be NULL. No tricks to try
+ * to hold on to this pointer are allowed.
+ */
+static void
+maybe_free_socket(isc_socket_t **socketp, int lineno) {
+ isc_socket_t *sock = *socketp;
+ *socketp = NULL;
+
+ INSIST(VALID_SOCKET(sock));
+ CONSISTENT(sock);
+
+ if (sock->pending_iocp > 0 || sock->pending_recv > 0 ||
+ sock->pending_send > 0 || sock->pending_accept > 0 ||
+ isc_refcount_current(&sock->references) > 0 ||
+ sock->pending_connect == 1 || !ISC_LIST_EMPTY(sock->recv_list) ||
+ !ISC_LIST_EMPTY(sock->send_list) ||
+ !ISC_LIST_EMPTY(sock->accept_list) ||
+ !ISC_LIST_EMPTY(sock->connect_list) || sock->fd != INVALID_SOCKET)
+ {
+ UNLOCK(&sock->lock);
+ return;
+ }
+ UNLOCK(&sock->lock);
+
+ free_socket(&sock, lineno);
+}
+
+void
+free_socket(isc_socket_t **sockp, int lineno) {
+ isc_socketmgr_t *manager;
+ isc_socket_t *sock = *sockp;
+ *sockp = NULL;
+
+ /*
+ * Seems we can free the socket after all.
+ */
+ manager = sock->manager;
+ socket_log(__LINE__, sock, NULL, CREATION,
+ "freeing socket line %d fd %d lock %p semaphore %p", lineno,
+ sock->fd, &sock->lock, sock->lock.LockSemaphore);
+
+ sock->magic = 0;
+ isc_mutex_destroy(&sock->lock);
+
+ if (sock->recvbuf.base != NULL) {
+ isc_mem_put(manager->mctx, sock->recvbuf.base,
+ sock->recvbuf.len);
+ }
+
+ LOCK(&manager->lock);
+ if (ISC_LINK_LINKED(sock, link)) {
+ ISC_LIST_UNLINK(manager->socklist, sock, link);
+ }
+ isc_mem_put(manager->mctx, sock, sizeof(*sock));
+
+ if (ISC_LIST_EMPTY(manager->socklist)) {
+ SIGNAL(&manager->shutdown_ok);
+ }
+ UNLOCK(&manager->lock);
+}
+
+/*
+ * Create a new 'type' socket managed by 'manager'. Events
+ * will be posted to 'task' and when dispatched 'action' will be
+ * called with 'arg' as the arg value. The new socket is returned
+ * in 'socketp'.
+ */
+static isc_result_t
+socket_create(isc_socketmgr_t *manager, int pf, isc_sockettype_t type,
+ isc_socket_t **socketp, isc_socket_t *dup_socket) {
+ isc_socket_t *sock = NULL;
+ isc_result_t result;
+#if defined(USE_CMSG)
+ int on = 1;
+#endif /* if defined(USE_CMSG) */
+#if defined(SO_RCVBUF)
+ socklen_t optlen;
+ int size;
+#endif /* if defined(SO_RCVBUF) */
+ int socket_errno;
+ char strbuf[ISC_STRERRORSIZE];
+
+ REQUIRE(VALID_MANAGER(manager));
+ REQUIRE(socketp != NULL && *socketp == NULL);
+
+#ifndef SOCK_RAW
+ if (type == isc_sockettype_raw) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+#endif /* ifndef SOCK_RAW */
+
+ result = allocate_socket(manager, type, &sock);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ sock->pf = pf;
+ switch (type) {
+ case isc_sockettype_udp:
+ sock->fd = socket(pf, SOCK_DGRAM, IPPROTO_UDP);
+ if (sock->fd != INVALID_SOCKET) {
+ result = connection_reset_fix(sock->fd);
+ if (result != ISC_R_SUCCESS) {
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "closed %d %d %" PRIuFAST32 " "
+ "con_reset_fix_failed",
+ sock->pending_recv,
+ sock->pending_send,
+ isc_refcount_current(
+ &sock->references));
+ closesocket(sock->fd);
+ _set_state(sock, SOCK_CLOSED);
+ sock->fd = INVALID_SOCKET;
+ free_socket(&sock, __LINE__);
+ return (result);
+ }
+ }
+ break;
+ case isc_sockettype_tcp:
+ sock->fd = socket(pf, SOCK_STREAM, IPPROTO_TCP);
+ break;
+#ifdef SOCK_RAW
+ case isc_sockettype_raw:
+ sock->fd = socket(pf, SOCK_RAW, 0);
+#ifdef PF_ROUTE
+ if (pf == PF_ROUTE) {
+ sock->bound = 1;
+ }
+#endif /* ifdef PF_ROUTE */
+ break;
+#endif /* ifdef SOCK_RAW */
+ }
+
+ if (sock->fd == INVALID_SOCKET) {
+ socket_errno = WSAGetLastError();
+ free_socket(&sock, __LINE__);
+
+ switch (socket_errno) {
+ case WSAEMFILE:
+ case WSAENOBUFS:
+ return (ISC_R_NORESOURCES);
+
+ case WSAEPROTONOSUPPORT:
+ case WSAEPFNOSUPPORT:
+ case WSAEAFNOSUPPORT:
+ return (ISC_R_FAMILYNOSUPPORT);
+
+ default:
+ strerror_r(socket_errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "socket() failed: %s", strbuf);
+ return (ISC_R_UNEXPECTED);
+ }
+ }
+
+ result = make_nonblock(sock->fd);
+ if (result != ISC_R_SUCCESS) {
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "closed %d %d %" PRIuFAST32 " make_nonblock_failed",
+ sock->pending_recv, sock->pending_send,
+ isc_refcount_current(&sock->references));
+ closesocket(sock->fd);
+ sock->fd = INVALID_SOCKET;
+ free_socket(&sock, __LINE__);
+ return (result);
+ }
+
+ /*
+ * Use minimum mtu if possible.
+ */
+ use_min_mtu(sock);
+
+#if defined(USE_CMSG) || defined(SO_RCVBUF)
+ if (type == isc_sockettype_udp) {
+#if defined(USE_CMSG)
+#ifdef IPV6_RECVPKTINFO
+ /* 2292bis */
+ if ((pf == AF_INET6) &&
+ (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
+ (char *)&on, sizeof(on)) < 0))
+ {
+ strerror_r(WSAGetLastError(), strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "setsockopt(%d, IPV6_RECVPKTINFO) "
+ "failed: %s",
+ sock->fd, strbuf);
+ }
+#else /* ifdef IPV6_RECVPKTINFO */
+ /* 2292 */
+ if ((pf == AF_INET6) &&
+ (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_PKTINFO,
+ (char *)&on, sizeof(on)) < 0))
+ {
+ strerror_r(WSAGetLastError(), strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "setsockopt(%d, IPV6_PKTINFO) %s: %s",
+ sock->fd, strbuf);
+ }
+#endif /* IPV6_RECVPKTINFO */
+#endif /* defined(USE_CMSG) */
+
+#if defined(SO_RCVBUF)
+ optlen = sizeof(size);
+ if (getsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF, (char *)&size,
+ &optlen) >= 0 &&
+ size < RCVBUFSIZE)
+ {
+ size = RCVBUFSIZE;
+ (void)setsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF,
+ (char *)&size, sizeof(size));
+ }
+#endif /* if defined(SO_RCVBUF) */
+ }
+#endif /* defined(USE_CMSG) || defined(SO_RCVBUF) */
+
+ _set_state(sock, SOCK_OPEN);
+ isc_refcount_init(&sock->references, 1);
+ *socketp = sock;
+
+ iocompletionport_update(sock);
+
+ if (dup_socket) {
+#ifndef ISC_ALLOW_MAPPED
+ isc_socket_ipv6only(sock, true);
+#endif /* ifndef ISC_ALLOW_MAPPED */
+
+ if (dup_socket->bound) {
+ isc_sockaddr_t local;
+
+ result = isc_socket_getsockname(dup_socket, &local);
+ if (result != ISC_R_SUCCESS) {
+ isc_socket_close(sock);
+ return (result);
+ }
+ result = isc_socket_bind(sock, &local,
+ ISC_SOCKET_REUSEADDRESS);
+ if (result != ISC_R_SUCCESS) {
+ isc_socket_close(sock);
+ return (result);
+ }
+ }
+ sock->dupped = 1;
+ }
+
+ /*
+ * Note we don't have to lock the socket like we normally would because
+ * there are no external references to it yet.
+ */
+ LOCK(&manager->lock);
+ ISC_LIST_APPEND(manager->socklist, sock, link);
+ InterlockedIncrement(&manager->totalSockets);
+ UNLOCK(&manager->lock);
+
+ socket_log(__LINE__, sock, NULL, CREATION, "created %u type %u",
+ sock->fd, type);
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_socket_create(isc_socketmgr_t *manager, int pf, isc_sockettype_t type,
+ isc_socket_t **socketp) {
+ return (socket_create(manager, pf, type, socketp, NULL));
+}
+
+isc_result_t
+isc_socket_dup(isc_socket_t *sock, isc_socket_t **socketp) {
+ REQUIRE(VALID_SOCKET(sock));
+ REQUIRE(socketp != NULL && *socketp == NULL);
+
+ return (socket_create(sock->manager, sock->pf, sock->type, socketp,
+ sock));
+}
+
+isc_result_t
+isc_socket_open(isc_socket_t *sock) {
+ REQUIRE(VALID_SOCKET(sock));
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+/*
+ * Attach to a socket. Caller must explicitly detach when it is done.
+ */
+void
+isc_socket_attach(isc_socket_t *sock, isc_socket_t **socketp) {
+ REQUIRE(VALID_SOCKET(sock));
+ REQUIRE(socketp != NULL && *socketp == NULL);
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+ UNLOCK(&sock->lock);
+
+ isc_refcount_increment0(&sock->references);
+
+ *socketp = sock;
+}
+
+/*
+ * Dereference a socket. If this is the last reference to it, clean things
+ * up by destroying the socket.
+ */
+void
+isc_socket_detach(isc_socket_t **socketp) {
+ isc_socket_t *sock;
+ uint32_t references;
+
+ REQUIRE(socketp != NULL);
+ sock = *socketp;
+ *socketp = NULL;
+ REQUIRE(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ references = isc_refcount_decrement(&sock->references);
+
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "detach_socket %d %d %" PRIuFAST32, sock->pending_recv,
+ sock->pending_send, isc_refcount_current(&sock->references));
+
+ if (references == 1 && sock->fd != INVALID_SOCKET) {
+ closesocket(sock->fd);
+ sock->fd = INVALID_SOCKET;
+ _set_state(sock, SOCK_CLOSED);
+ }
+
+ maybe_free_socket(&sock, __LINE__); /* Also unlocks the socket lock */
+}
+
+isc_result_t
+isc_socket_close(isc_socket_t *sock) {
+ REQUIRE(VALID_SOCKET(sock));
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+/*
+ * Dequeue an item off the given socket's read queue, set the result code
+ * in the done event to the one provided, and send it to the task it was
+ * destined for.
+ *
+ * If the event to be sent is on a list, remove it before sending. If
+ * asked to, send and detach from the task as well.
+ *
+ * Caller must have the socket locked if the event is attached to the socket.
+ */
+static void
+send_recvdone_event(isc_socket_t *sock, isc_socketevent_t **dev) {
+ isc_task_t *task;
+
+ task = (*dev)->ev_sender;
+ (*dev)->ev_sender = sock;
+
+ if (ISC_LINK_LINKED(*dev, ev_link)) {
+ ISC_LIST_DEQUEUE(sock->recv_list, *dev, ev_link);
+ }
+
+ if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED) != 0) {
+ isc_task_sendanddetach(&task, (isc_event_t **)dev);
+ } else {
+ isc_task_send(task, (isc_event_t **)dev);
+ }
+
+ CONSISTENT(sock);
+}
+
+/*
+ * See comments for send_recvdone_event() above.
+ */
+static void
+send_senddone_event(isc_socket_t *sock, isc_socketevent_t **dev) {
+ isc_task_t *task;
+
+ INSIST(dev != NULL && *dev != NULL);
+
+ task = (*dev)->ev_sender;
+ (*dev)->ev_sender = sock;
+
+ if (ISC_LINK_LINKED(*dev, ev_link)) {
+ ISC_LIST_DEQUEUE(sock->send_list, *dev, ev_link);
+ }
+
+ if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED) != 0) {
+ isc_task_sendanddetach(&task, (isc_event_t **)dev);
+ } else {
+ isc_task_send(task, (isc_event_t **)dev);
+ }
+
+ CONSISTENT(sock);
+}
+
+/*
+ * See comments for send_recvdone_event() above.
+ */
+static void
+send_acceptdone_event(isc_socket_t *sock, isc_socket_newconnev_t **adev) {
+ isc_task_t *task;
+
+ INSIST(adev != NULL && *adev != NULL);
+
+ task = (*adev)->ev_sender;
+ (*adev)->ev_sender = sock;
+
+ if (ISC_LINK_LINKED(*adev, ev_link)) {
+ ISC_LIST_DEQUEUE(sock->accept_list, *adev, ev_link);
+ }
+
+ isc_task_sendanddetach(&task, (isc_event_t **)adev);
+
+ CONSISTENT(sock);
+}
+
+/*
+ * See comments for send_recvdone_event() above.
+ */
+static void
+send_connectdone_event(isc_socket_t *sock, isc_socket_connev_t **cdev) {
+ isc_task_t *task;
+
+ INSIST(cdev != NULL && *cdev != NULL);
+
+ task = (*cdev)->ev_sender;
+ (*cdev)->ev_sender = sock;
+
+ if (ISC_LINK_LINKED(*cdev, ev_link)) {
+ ISC_LIST_DEQUEUE(sock->connect_list, *cdev, ev_link);
+ }
+
+ isc_task_sendanddetach(&task, (isc_event_t **)cdev);
+
+ CONSISTENT(sock);
+}
+
+/*
+ * On entry to this function, the event delivered is the internal
+ * readable event, and the first item on the accept_list should be
+ * the done event we want to send. If the list is empty, this is a no-op,
+ * so just close the new connection, unlock, and return.
+ *
+ * Note the socket is locked before entering here
+ */
+static void
+internal_accept(isc_socket_t *sock, IoCompletionInfo *lpo, int accept_errno) {
+ isc_socket_newconnev_t *adev;
+ isc_result_t result = ISC_R_SUCCESS;
+ isc_socket_t *nsock;
+ struct sockaddr *localaddr;
+ int localaddr_len = sizeof(*localaddr);
+ struct sockaddr *remoteaddr;
+ int remoteaddr_len = sizeof(*remoteaddr);
+
+ INSIST(VALID_SOCKET(sock));
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ socket_log(__LINE__, sock, NULL, TRACE, "internal_accept called");
+
+ INSIST(sock->listener);
+
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_accept > 0);
+ sock->pending_accept--;
+
+ adev = lpo->adev;
+
+ /*
+ * If the event is no longer in the list we can just return.
+ */
+ if (!acceptdone_is_active(sock, adev)) {
+ goto done;
+ }
+
+ nsock = adev->newsocket;
+
+ /*
+ * Pull off the done event.
+ */
+ ISC_LIST_UNLINK(sock->accept_list, adev, ev_link);
+
+ /*
+ * Extract the addresses from the socket, copy them into the structure,
+ * and return the new socket.
+ */
+ ISCGetAcceptExSockaddrs(
+ lpo->acceptbuffer, 0, sizeof(SOCKADDR_STORAGE) + 16,
+ sizeof(SOCKADDR_STORAGE) + 16, (LPSOCKADDR *)&localaddr,
+ &localaddr_len, (LPSOCKADDR *)&remoteaddr, &remoteaddr_len);
+ memmove(&adev->address.type, remoteaddr, remoteaddr_len);
+ adev->address.length = remoteaddr_len;
+ nsock->address = adev->address;
+ nsock->pf = adev->address.type.sa.sa_family;
+
+ socket_log(__LINE__, nsock, &nsock->address, TRACE,
+ "internal_accept parent %p", sock);
+
+ result = make_nonblock(adev->newsocket->fd);
+ INSIST(result == ISC_R_SUCCESS);
+
+ /*
+ * Use minimum mtu if possible.
+ */
+ use_min_mtu(adev->newsocket);
+
+ INSIST(setsockopt(nsock->fd, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
+ (char *)&sock->fd, sizeof(sock->fd)) == 0);
+
+ /*
+ * Hook it up into the manager.
+ */
+ nsock->bound = 1;
+ nsock->connected = 1;
+ _set_state(nsock, SOCK_OPEN);
+
+ LOCK(&nsock->manager->lock);
+ ISC_LIST_APPEND(nsock->manager->socklist, nsock, link);
+ InterlockedIncrement(&nsock->manager->totalSockets);
+ UNLOCK(&nsock->manager->lock);
+
+ socket_log(__LINE__, sock, &nsock->address, CREATION,
+ "accepted_connection new_socket %p fd %d", nsock, nsock->fd);
+
+ adev->result = result;
+ send_acceptdone_event(sock, &adev);
+
+done:
+ CONSISTENT(sock);
+ UNLOCK(&sock->lock);
+
+ HeapFree(hHeapHandle, 0, lpo->acceptbuffer);
+ lpo->acceptbuffer = NULL;
+}
+
+/*
+ * Called when a socket with a pending connect() finishes.
+ * Note that the socket is locked before entering.
+ */
+static void
+internal_connect(isc_socket_t *sock, IoCompletionInfo *lpo, int connect_errno) {
+ isc_socket_connev_t *cdev;
+ isc_result_t result;
+ char strbuf[ISC_STRERRORSIZE];
+
+ INSIST(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_connect == 1);
+ sock->pending_connect = 0;
+
+ /*
+ * If the event is no longer in the list we can just close and return.
+ */
+ cdev = lpo->cdev;
+ if (!connectdone_is_active(sock, cdev)) {
+ sock->pending_connect = 0;
+ if (sock->fd != INVALID_SOCKET) {
+ closesocket(sock->fd);
+ sock->fd = INVALID_SOCKET;
+ _set_state(sock, SOCK_CLOSED);
+ }
+ CONSISTENT(sock);
+ UNLOCK(&sock->lock);
+ return;
+ }
+
+ /*
+ * Check possible Windows network event error status here.
+ */
+ if (connect_errno != 0) {
+ /*
+ * If the error is SOFT, just try again on this
+ * fd and pretend nothing strange happened.
+ */
+ if (SOFT_ERROR(connect_errno) ||
+ connect_errno == WSAEINPROGRESS)
+ {
+ sock->pending_connect = 1;
+ CONSISTENT(sock);
+ UNLOCK(&sock->lock);
+ return;
+ }
+
+ /*
+ * Translate other errors into ISC_R_* flavors.
+ */
+ switch (connect_errno) {
+#define ERROR_MATCH(a, b) \
+ case a: \
+ result = b; \
+ break;
+ ERROR_MATCH(WSAEACCES, ISC_R_NOPERM);
+ ERROR_MATCH(WSAEADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
+ ERROR_MATCH(WSAEAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
+ ERROR_MATCH(WSAECONNREFUSED, ISC_R_CONNREFUSED);
+ ERROR_MATCH(WSAEHOSTUNREACH, ISC_R_HOSTUNREACH);
+ ERROR_MATCH(WSAEHOSTDOWN, ISC_R_HOSTDOWN);
+ ERROR_MATCH(WSAENETUNREACH, ISC_R_NETUNREACH);
+ ERROR_MATCH(WSAENETDOWN, ISC_R_NETDOWN);
+ ERROR_MATCH(WSAENOBUFS, ISC_R_NORESOURCES);
+ ERROR_MATCH(WSAECONNRESET, ISC_R_CONNECTIONRESET);
+ ERROR_MATCH(WSAECONNABORTED, ISC_R_CONNECTIONRESET);
+ ERROR_MATCH(WSAETIMEDOUT, ISC_R_TIMEDOUT);
+#undef ERROR_MATCH
+ default:
+ result = ISC_R_UNEXPECTED;
+ strerror_r(connect_errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "internal_connect: connect() %s",
+ strbuf);
+ }
+ } else {
+ INSIST(setsockopt(sock->fd, SOL_SOCKET,
+ SO_UPDATE_CONNECT_CONTEXT, NULL, 0) == 0);
+ result = ISC_R_SUCCESS;
+ sock->connected = 1;
+ socket_log(__LINE__, sock, &sock->address, IOEVENT,
+ "internal_connect: success");
+ }
+
+ do {
+ cdev->result = result;
+ send_connectdone_event(sock, &cdev);
+ cdev = ISC_LIST_HEAD(sock->connect_list);
+ } while (cdev != NULL);
+
+ UNLOCK(&sock->lock);
+}
+
+/*
+ * Loop through the socket, returning ISC_R_EOF for each done event pending.
+ */
+static void
+send_recvdone_abort(isc_socket_t *sock, isc_result_t result) {
+ isc_socketevent_t *dev;
+
+ while (!ISC_LIST_EMPTY(sock->recv_list)) {
+ dev = ISC_LIST_HEAD(sock->recv_list);
+ dev->result = result;
+ send_recvdone_event(sock, &dev);
+ }
+}
+
+/*
+ * Loop through the socket, returning result for each done event pending.
+ */
+static void
+send_connectdone_abort(isc_socket_t *sock, isc_result_t result) {
+ isc_socket_connev_t *dev;
+
+ while (!ISC_LIST_EMPTY(sock->connect_list)) {
+ dev = ISC_LIST_HEAD(sock->connect_list);
+ dev->result = result;
+ send_connectdone_event(sock, &dev);
+ }
+}
+
+/*
+ * Take the data we received in our private buffer, and if any recv() calls on
+ * our list are satisfied, send the corresponding done event.
+ *
+ * If we need more data (there are still items on the recv_list after we consume
+ * all our data) then arrange for another system recv() call to fill our
+ * buffers.
+ */
+static void
+internal_recv(isc_socket_t *sock, int nbytes) {
+ INSIST(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ socket_log(__LINE__, sock, NULL, IOEVENT,
+ "internal_recv: %d bytes received", nbytes);
+
+ /*
+ * If we got here, the I/O operation succeeded. However, we might
+ * still have removed this event from our notification list (or never
+ * placed it on it due to immediate completion.)
+ * Handle the reference counting here, and handle the cancellation
+ * event just after.
+ */
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_recv > 0);
+ sock->pending_recv--;
+
+ /*
+ * The only way we could have gotten here is that our I/O has
+ * successfully completed. Update our pointers, and move on.
+ * The only odd case here is that we might not have received
+ * enough data on a TCP stream to satisfy the minimum requirements.
+ * If this is the case, we will re-issue the recv() call for what
+ * we need.
+ *
+ * We do check for a recv() of 0 bytes on a TCP stream. This
+ * means the remote end has closed.
+ */
+ if (nbytes == 0 && sock->type == isc_sockettype_tcp) {
+ send_recvdone_abort(sock, ISC_R_EOF);
+ maybe_free_socket(&sock, __LINE__);
+ return;
+ }
+ sock->recvbuf.remaining = nbytes;
+ sock->recvbuf.consume_position = sock->recvbuf.base;
+ completeio_recv(sock);
+
+ /*
+ * If there are more receivers waiting for data, queue another receive
+ * here.
+ */
+ queue_receive_request(sock);
+
+ /*
+ * Unlock and/or destroy if we are the last thing this socket has left
+ * to do.
+ */
+ maybe_free_socket(&sock, __LINE__);
+}
+
+static void
+internal_send(isc_socket_t *sock, isc_socketevent_t *dev,
+ struct msghdr *messagehdr, int nbytes, int send_errno,
+ IoCompletionInfo *lpo) {
+ /*
+ * Find out what socket this is and lock it.
+ */
+ INSIST(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ socket_log(__LINE__, sock, NULL, IOEVENT,
+ "internal_send: task got socket event %p", dev);
+
+ if (lpo->buf != NULL) {
+ socket_log(__LINE__, sock, NULL, TRACE, "free_buffer %p",
+ lpo->buf);
+
+ HeapFree(hHeapHandle, 0, lpo->buf);
+ lpo->buf = NULL;
+ lpo->buflen = 0;
+ }
+
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_send > 0);
+ sock->pending_send--;
+
+ /* If the event is no longer in the list we can just return */
+ if (!senddone_is_active(sock, dev)) {
+ goto done;
+ }
+
+ /*
+ * Set the error code and send things on its way.
+ */
+ switch (completeio_send(sock, dev, messagehdr, nbytes, send_errno)) {
+ case DOIO_SOFT:
+ break;
+ case DOIO_HARD:
+ case DOIO_SUCCESS:
+ send_senddone_event(sock, &dev);
+ break;
+ }
+
+done:
+ maybe_free_socket(&sock, __LINE__);
+}
+
+/*
+ * These return if the done event passed in is on the list.
+ * Using these ensures we will not double-send an event.
+ */
+static bool
+senddone_is_active(isc_socket_t *sock, isc_socketevent_t *dev) {
+ isc_socketevent_t *ldev;
+
+ ldev = ISC_LIST_HEAD(sock->send_list);
+ while (ldev != NULL && ldev != dev) {
+ ldev = ISC_LIST_NEXT(ldev, ev_link);
+ }
+
+ return (ldev == NULL ? false : true);
+}
+
+static bool
+acceptdone_is_active(isc_socket_t *sock, isc_socket_newconnev_t *dev) {
+ isc_socket_newconnev_t *ldev;
+
+ ldev = ISC_LIST_HEAD(sock->accept_list);
+ while (ldev != NULL && ldev != dev) {
+ ldev = ISC_LIST_NEXT(ldev, ev_link);
+ }
+
+ return (ldev == NULL ? false : true);
+}
+
+static bool
+connectdone_is_active(isc_socket_t *sock, isc_socket_connev_t *dev) {
+ isc_socket_connev_t *cdev;
+
+ cdev = ISC_LIST_HEAD(sock->connect_list);
+ while (cdev != NULL && cdev != dev) {
+ cdev = ISC_LIST_NEXT(cdev, ev_link);
+ }
+
+ return (cdev == NULL ? false : true);
+}
+
+/* */
+/* The Windows network stack seems to have two very distinct paths depending */
+/* on what is installed. Specifically, if something is looking at network */
+/* connections (like an anti-virus or anti-malware application, such as */
+/* McAfee products) Windows may return additional error conditions which */
+/* were not previously returned. */
+/* */
+/* One specific one is when a TCP SYN scan is used. In this situation, */
+/* Windows responds with the SYN-ACK, but the scanner never responds with */
+/* the 3rd packet, the ACK. Windows considers this a partially open connection.
+ */
+/* Most Unix networking stacks, and Windows without McAfee installed, will */
+/* not return this to the caller. However, with this product installed, */
+/* Windows returns this as a failed status on the Accept() call. Here, we */
+/* will just re-issue the ISCAcceptEx() call as if nothing had happened. */
+/* */
+/* This code should only be called when the listening socket has received */
+/* such an error. Additionally, the "parent" socket must be locked. */
+/* Additionally, the lpo argument is re-used here, and must not be freed */
+/* by the caller. */
+/* */
+static isc_result_t
+restart_accept(isc_socket_t *parent, IoCompletionInfo *lpo) {
+ isc_socket_t *nsock = lpo->adev->newsocket;
+ SOCKET new_fd;
+
+ /*
+ * AcceptEx() requires we pass in a socket. Note that we carefully
+ * do not close the previous socket in case of an error message returned
+ * by our new socket() call. If we return an error here, our caller
+ * will clean up.
+ */
+ new_fd = socket(parent->pf, SOCK_STREAM, IPPROTO_TCP);
+ if (nsock->fd == INVALID_SOCKET) {
+ return (ISC_R_FAILURE); /* parent will ask windows for error */
+ /* message */
+ }
+ closesocket(nsock->fd);
+ nsock->fd = new_fd;
+
+ memset(&lpo->overlapped, 0, sizeof(lpo->overlapped));
+
+ ISCAcceptEx(parent->fd, nsock->fd, /* Accepted Socket */
+ lpo->acceptbuffer, /* Buffer for initial Recv */
+ 0, /* Length of Buffer */
+ sizeof(SOCKADDR_STORAGE) + 16, /* Local address length + 16
+ */
+ sizeof(SOCKADDR_STORAGE) + 16, /* Remote address length + 16
+ */
+ (LPDWORD)&lpo->received_bytes, /* Bytes Recved */
+ (LPOVERLAPPED)lpo /* Overlapped structure */
+ );
+
+ InterlockedDecrement(&nsock->manager->iocp_total);
+ iocompletionport_update(nsock);
+
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * This is the I/O Completion Port Worker Function. It loops forever
+ * waiting for I/O to complete and then forwards them for further
+ * processing. There are a number of these in separate threads.
+ */
+static isc_threadresult_t WINAPI
+SocketIoThread(LPVOID ThreadContext) {
+ isc_socketmgr_t *manager = ThreadContext;
+ DWORD nbytes;
+ IoCompletionInfo *lpo = NULL;
+ isc_socket_t *sock = NULL;
+ int request;
+ struct msghdr *messagehdr = NULL;
+ int errval;
+ char strbuf[ISC_STRERRORSIZE];
+ int errstatus;
+
+ REQUIRE(VALID_MANAGER(manager));
+
+ /*
+ * Set the thread priority high enough so I/O will
+ * preempt normal recv packet processing, but not
+ * higher than the timer sync thread.
+ */
+ if (!SetThreadPriority(GetCurrentThread(),
+ THREAD_PRIORITY_ABOVE_NORMAL))
+ {
+ errval = GetLastError();
+ strerror_r(errval, strbuf, sizeof(strbuf));
+ FATAL_ERROR(__FILE__, __LINE__, "Can't set thread priority: %s",
+ strbuf);
+ }
+
+ /*
+ * Loop forever waiting on I/O Completions and then processing them
+ */
+ while (TRUE) {
+ BOOL bSuccess;
+
+ wait_again:
+ bSuccess = GetQueuedCompletionStatus(
+ manager->hIoCompletionPort, &nbytes, (PULONG_PTR)&sock,
+ (LPWSAOVERLAPPED *)&lpo, INFINITE);
+ if (lpo == NULL) { /* Received request to exit */
+ break;
+ }
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ request = lpo->request_type;
+
+ if (!bSuccess) {
+ errstatus = GetLastError();
+ } else {
+ errstatus = 0;
+ }
+ if (!bSuccess && errstatus != ERROR_MORE_DATA) {
+ isc_result_t isc_result;
+
+ /*
+ * Did the I/O operation complete?
+ */
+ isc_result = isc__errno2result(errstatus);
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+ switch (request) {
+ case SOCKET_RECV:
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_recv > 0);
+ sock->pending_recv--;
+ if (!sock->connected &&
+ ((errstatus == ERROR_HOST_UNREACHABLE) ||
+ (errstatus == WSAENETRESET) ||
+ (errstatus == WSAECONNRESET)))
+ {
+ /* ignore soft errors */
+ queue_receive_request(sock);
+ break;
+ }
+ send_recvdone_abort(sock, isc_result);
+ if (isc_result == ISC_R_UNEXPECTED) {
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "SOCKET_RECV: Windows "
+ "error code: %d, "
+ "returning ISC error "
+ "%d",
+ errstatus, isc_result);
+ }
+ break;
+
+ case SOCKET_SEND:
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_send > 0);
+ sock->pending_send--;
+ if (senddone_is_active(sock, lpo->dev)) {
+ lpo->dev->result = isc_result;
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "canceled_send");
+ send_senddone_event(sock, &lpo->dev);
+ }
+ break;
+
+ case SOCKET_ACCEPT:
+ INSIST(sock->pending_iocp > 0);
+ INSIST(sock->pending_accept > 0);
+
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "Accept: errstatus=%d isc_result=%d",
+ errstatus, isc_result);
+
+ if (acceptdone_is_active(sock, lpo->adev)) {
+ if (restart_accept(sock, lpo) ==
+ ISC_R_SUCCESS)
+ {
+ UNLOCK(&sock->lock);
+ goto wait_again;
+ } else {
+ errstatus = GetLastError();
+ isc_result = isc__errno2result(
+ errstatus);
+ socket_log(__LINE__, sock, NULL,
+ EVENT,
+ "restart_accept() "
+ "failed: "
+ "errstatus=%d "
+ "isc_result=%d",
+ errstatus,
+ isc_result);
+ }
+ }
+
+ sock->pending_iocp--;
+ sock->pending_accept--;
+ if (acceptdone_is_active(sock, lpo->adev)) {
+ closesocket(lpo->adev->newsocket->fd);
+ lpo->adev->newsocket->fd =
+ INVALID_SOCKET;
+ isc_refcount_decrementz(
+ &lpo->adev->newsocket
+ ->references);
+ free_socket(&lpo->adev->newsocket,
+ __LINE__);
+ lpo->adev->result = isc_result;
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "canceled_accept");
+ send_acceptdone_event(sock, &lpo->adev);
+ }
+ break;
+
+ case SOCKET_CONNECT:
+ INSIST(sock->pending_iocp > 0);
+ sock->pending_iocp--;
+ INSIST(sock->pending_connect == 1);
+ sock->pending_connect = 0;
+ if (connectdone_is_active(sock, lpo->cdev)) {
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "canceled_connect");
+ send_connectdone_abort(sock,
+ isc_result);
+ }
+ break;
+ }
+ maybe_free_socket(&sock, __LINE__);
+
+ if (lpo != NULL) {
+ HeapFree(hHeapHandle, 0, lpo);
+ }
+ continue;
+ }
+
+ messagehdr = &lpo->messagehdr;
+
+ switch (request) {
+ case SOCKET_RECV:
+ internal_recv(sock, nbytes);
+ break;
+ case SOCKET_SEND:
+ internal_send(sock, lpo->dev, messagehdr, nbytes,
+ errstatus, lpo);
+ break;
+ case SOCKET_ACCEPT:
+ internal_accept(sock, lpo, errstatus);
+ break;
+ case SOCKET_CONNECT:
+ internal_connect(sock, lpo, errstatus);
+ break;
+ }
+
+ if (lpo != NULL) {
+ HeapFree(hHeapHandle, 0, lpo);
+ }
+ }
+
+ /*
+ * Exit Completion Port Thread
+ */
+ manager_log(manager, TRACE, "SocketIoThread exiting");
+ return ((isc_threadresult_t)0);
+}
+
+/*
+ * Create a new socket manager.
+ */
+isc_result_t
+isc_socketmgr_create(isc_mem_t *mctx, isc_socketmgr_t **managerp) {
+ return (isc_socketmgr_create2(mctx, managerp, 0, 1));
+}
+
+isc_result_t
+isc_socketmgr_create2(isc_mem_t *mctx, isc_socketmgr_t **managerp,
+ unsigned int maxsocks, int nthreads) {
+ isc_socketmgr_t *manager;
+
+ REQUIRE(managerp != NULL && *managerp == NULL);
+
+ if (maxsocks != 0) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ manager = isc_mem_get(mctx, sizeof(*manager));
+
+ InitSockets();
+
+ manager->magic = SOCKET_MANAGER_MAGIC;
+ manager->mctx = NULL;
+ manager->stats = NULL;
+ ISC_LIST_INIT(manager->socklist);
+ isc_mutex_init(&manager->lock);
+ isc_condition_init(&manager->shutdown_ok);
+
+ isc_mem_attach(mctx, &manager->mctx);
+ if (nthreads == 0) {
+ nthreads = isc_os_ncpus() + 1;
+ }
+ manager->maxIOCPThreads = min(nthreads, MAX_IOCPTHREADS);
+
+ iocompletionport_init(manager); /* Create the Completion Ports */
+
+ manager->bShutdown = false;
+ manager->totalSockets = 0;
+ manager->iocp_total = 0;
+ manager->maxudp = 0;
+
+ *managerp = manager;
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_socketmgr_getmaxsockets(isc_socketmgr_t *manager, unsigned int *nsockp) {
+ REQUIRE(VALID_MANAGER(manager));
+ REQUIRE(nsockp != NULL);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+void
+isc_socketmgr_setstats(isc_socketmgr_t *manager, isc_stats_t *stats) {
+ REQUIRE(VALID_MANAGER(manager));
+ REQUIRE(ISC_LIST_EMPTY(manager->socklist));
+ REQUIRE(manager->stats == NULL);
+ REQUIRE(isc_stats_ncounters(stats) == isc_sockstatscounter_max);
+
+ isc_stats_attach(stats, &manager->stats);
+}
+
+void
+isc_socketmgr_destroy(isc_socketmgr_t **managerp) {
+ isc_socketmgr_t *manager;
+
+ /*
+ * Destroy a socket manager.
+ */
+
+ REQUIRE(managerp != NULL);
+ manager = *managerp;
+ *managerp = NULL;
+ REQUIRE(VALID_MANAGER(manager));
+
+ LOCK(&manager->lock);
+
+ /*
+ * Wait for all sockets to be destroyed.
+ */
+ while (!ISC_LIST_EMPTY(manager->socklist)) {
+ manager_log(manager, CREATION, "sockets exist");
+ WAIT(&manager->shutdown_ok, &manager->lock);
+ }
+
+ UNLOCK(&manager->lock);
+
+ /*
+ * Here, we need to had some wait code for the completion port
+ * thread.
+ */
+ signal_iocompletionport_exit(manager);
+ manager->bShutdown = true;
+
+ /*
+ * Wait for threads to exit.
+ */
+ for (int i = 0; i < manager->maxIOCPThreads; i++) {
+ isc_thread_join((isc_thread_t)manager->hIOCPThreads[i], NULL);
+ }
+ /*
+ * Clean up.
+ */
+
+ CloseHandle(manager->hIoCompletionPort);
+
+ (void)isc_condition_destroy(&manager->shutdown_ok);
+
+ isc_mutex_destroy(&manager->lock);
+ if (manager->stats != NULL) {
+ isc_stats_detach(&manager->stats);
+ }
+ manager->magic = 0;
+ isc_mem_putanddetach(&manager->mctx, manager, sizeof(*manager));
+}
+
+static void
+queue_receive_event(isc_socket_t *sock, isc_task_t *task,
+ isc_socketevent_t *dev) {
+ isc_task_t *ntask = NULL;
+
+ isc_task_attach(task, &ntask);
+ dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED;
+
+ /*
+ * Enqueue the request.
+ */
+ INSIST(!ISC_LINK_LINKED(dev, ev_link));
+ ISC_LIST_ENQUEUE(sock->recv_list, dev, ev_link);
+
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "queue_receive_event: event %p -> task %p", dev, ntask);
+}
+
+/*
+ * Check the pending receive queue, and if we have data pending, give it to this
+ * caller. If we have none, queue an I/O request. If this caller is not the
+ * first on the list, then we will just queue this event and return.
+ *
+ * Caller must have the socket locked.
+ */
+static isc_result_t
+socket_recv(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task,
+ unsigned int flags) {
+ isc_result_t result = ISC_R_SUCCESS;
+
+ dev->ev_sender = task;
+
+ if (sock->fd == INVALID_SOCKET) {
+ return (ISC_R_EOF);
+ }
+
+ /*
+ * Queue our event on the list of things to do. Call our function to
+ * attempt to fill buffers as much as possible, and return done events.
+ * We are going to lie about our handling of the ISC_SOCKFLAG_IMMEDIATE
+ * here and tell our caller that we could not satisfy it immediately.
+ */
+ queue_receive_event(sock, task, dev);
+ if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0) {
+ result = ISC_R_INPROGRESS;
+ }
+
+ completeio_recv(sock);
+
+ /*
+ * If there are more receivers waiting for data, queue another receive
+ * here. If the
+ */
+ queue_receive_request(sock);
+
+ return (result);
+}
+
+isc_result_t
+isc_socket_recv(isc_socket_t *sock, isc_region_t *region, unsigned int minimum,
+ isc_task_t *task, isc_taskaction_t action, void *arg) {
+ isc_socketevent_t *dev;
+ isc_socketmgr_t *manager;
+ isc_result_t ret;
+
+ REQUIRE(VALID_SOCKET(sock));
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+ REQUIRE(action != NULL);
+
+ manager = sock->manager;
+ REQUIRE(VALID_MANAGER(manager));
+
+ INSIST(sock->bound);
+
+ dev = allocate_socketevent(manager->mctx, sock, ISC_SOCKEVENT_RECVDONE,
+ action, arg);
+ if (dev == NULL) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_NOMEMORY);
+ }
+
+ ret = isc_socket_recv2(sock, region, minimum, task, dev, 0);
+ UNLOCK(&sock->lock);
+ return (ret);
+}
+
+isc_result_t
+isc_socket_recv2(isc_socket_t *sock, isc_region_t *region, unsigned int minimum,
+ isc_task_t *task, isc_socketevent_t *event,
+ unsigned int flags) {
+ isc_result_t ret;
+
+ REQUIRE(VALID_SOCKET(sock));
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ event->result = ISC_R_UNEXPECTED;
+ event->ev_sender = sock;
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ event->region = *region;
+ event->n = 0;
+ event->offset = 0;
+ event->attributes = 0;
+
+ /*
+ * UDP sockets are always partial read.
+ */
+ if (sock->type == isc_sockettype_udp) {
+ event->minimum = 1;
+ } else {
+ if (minimum == 0) {
+ event->minimum = region->length;
+ } else {
+ event->minimum = minimum;
+ }
+ }
+
+ ret = socket_recv(sock, event, task, flags);
+ UNLOCK(&sock->lock);
+ return (ret);
+}
+
+/*
+ * Caller must have the socket locked.
+ */
+static isc_result_t
+socket_send(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task,
+ const isc_sockaddr_t *address, struct in6_pktinfo *pktinfo,
+ unsigned int flags) {
+ int io_state;
+ int send_errno = 0;
+ int cc = 0;
+ isc_task_t *ntask = NULL;
+ isc_result_t result = ISC_R_SUCCESS;
+
+ dev->ev_sender = task;
+
+ set_dev_address(address, sock, dev);
+ if (pktinfo != NULL) {
+ socket_log(__LINE__, sock, NULL, TRACE,
+ "pktinfo structure provided, ifindex %u (set to 0)",
+ pktinfo->ipi6_ifindex);
+
+ dev->attributes |= ISC_SOCKEVENTATTR_PKTINFO;
+ dev->pktinfo = *pktinfo;
+ /*
+ * Set the pktinfo index to 0 here, to let the kernel decide
+ * what interface it should send on.
+ */
+ dev->pktinfo.ipi6_ifindex = 0;
+ }
+
+ io_state = startio_send(sock, dev, &cc, &send_errno);
+ switch (io_state) {
+ case DOIO_PENDING: /* I/O started. Enqueue completion event. */
+ case DOIO_SOFT:
+ /*
+ * We couldn't send all or part of the request right now, so
+ * queue it unless ISC_SOCKFLAG_NORETRY is set.
+ */
+ if ((flags & ISC_SOCKFLAG_NORETRY) == 0 ||
+ io_state == DOIO_PENDING)
+ {
+ isc_task_attach(task, &ntask);
+ dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED;
+
+ /*
+ * Enqueue the request.
+ */
+ INSIST(!ISC_LINK_LINKED(dev, ev_link));
+ ISC_LIST_ENQUEUE(sock->send_list, dev, ev_link);
+
+ socket_log(__LINE__, sock, NULL, EVENT,
+ "socket_send: event %p -> task %p", dev,
+ ntask);
+
+ if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0) {
+ result = ISC_R_INPROGRESS;
+ }
+ break;
+ }
+
+ case DOIO_SUCCESS:
+ break;
+ }
+
+ return (result);
+}
+
+isc_result_t
+isc_socket_send(isc_socket_t *sock, isc_region_t *region, isc_task_t *task,
+ isc_taskaction_t action, void *arg) {
+ /*
+ * REQUIRE() checking is performed in isc_socket_sendto().
+ */
+ return (isc_socket_sendto(sock, region, task, action, arg, NULL, NULL));
+}
+
+isc_result_t
+isc_socket_sendto(isc_socket_t *sock, isc_region_t *region, isc_task_t *task,
+ isc_taskaction_t action, void *arg,
+ const isc_sockaddr_t *address, struct in6_pktinfo *pktinfo) {
+ isc_socketevent_t *dev;
+ isc_socketmgr_t *manager;
+ isc_result_t ret;
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+ REQUIRE(region != NULL);
+ REQUIRE(task != NULL);
+ REQUIRE(action != NULL);
+
+ manager = sock->manager;
+ REQUIRE(VALID_MANAGER(manager));
+
+ INSIST(sock->bound);
+
+ dev = allocate_socketevent(manager->mctx, sock, ISC_SOCKEVENT_SENDDONE,
+ action, arg);
+ if (dev == NULL) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_NOMEMORY);
+ }
+ dev->region = *region;
+
+ ret = socket_send(sock, dev, task, address, pktinfo, 0);
+ UNLOCK(&sock->lock);
+ return (ret);
+}
+
+isc_result_t
+isc_socket_sendto2(isc_socket_t *sock, isc_region_t *region, isc_task_t *task,
+ const isc_sockaddr_t *address, struct in6_pktinfo *pktinfo,
+ isc_socketevent_t *event, unsigned int flags) {
+ isc_result_t ret;
+
+ REQUIRE(VALID_SOCKET(sock));
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ REQUIRE((flags & ~(ISC_SOCKFLAG_IMMEDIATE | ISC_SOCKFLAG_NORETRY)) ==
+ 0);
+ if ((flags & ISC_SOCKFLAG_NORETRY) != 0) {
+ REQUIRE(sock->type == isc_sockettype_udp);
+ }
+ event->ev_sender = sock;
+ event->result = ISC_R_UNEXPECTED;
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+ event->region = *region;
+ event->n = 0;
+ event->offset = 0;
+ event->attributes = 0;
+
+ ret = socket_send(sock, event, task, address, pktinfo, flags);
+ UNLOCK(&sock->lock);
+ return (ret);
+}
+
+isc_result_t
+isc_socket_bind(isc_socket_t *sock, const isc_sockaddr_t *sockaddr,
+ isc_socket_options_t options) {
+ int bind_errno;
+ char strbuf[ISC_STRERRORSIZE];
+ int on = 1;
+
+ REQUIRE(VALID_SOCKET(sock));
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ INSIST(!sock->bound);
+ INSIST(!sock->dupped);
+
+ if (sock->pf != sockaddr->type.sa.sa_family) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_FAMILYMISMATCH);
+ }
+ /*
+ * Only set SO_REUSEADDR when we want a specific port.
+ */
+ if ((options & ISC_SOCKET_REUSEADDRESS) != 0 &&
+ isc_sockaddr_getport(sockaddr) != (in_port_t)0 &&
+ setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
+ sizeof(on)) < 0)
+ {
+ UNEXPECTED_ERROR(__FILE__, __LINE__, "setsockopt(%d) failed",
+ sock->fd);
+ /* Press on... */
+ }
+ if (bind(sock->fd, &sockaddr->type.sa, sockaddr->length) < 0) {
+ bind_errno = WSAGetLastError();
+ UNLOCK(&sock->lock);
+ switch (bind_errno) {
+ case WSAEACCES:
+ return (ISC_R_NOPERM);
+ case WSAEADDRNOTAVAIL:
+ return (ISC_R_ADDRNOTAVAIL);
+ case WSAEADDRINUSE:
+ return (ISC_R_ADDRINUSE);
+ case WSAEINVAL:
+ return (ISC_R_BOUND);
+ default:
+ strerror_r(bind_errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__, "bind: %s",
+ strbuf);
+ return (ISC_R_UNEXPECTED);
+ }
+ }
+
+ socket_log(__LINE__, sock, sockaddr, TRACE, "bound");
+ sock->bound = 1;
+
+ UNLOCK(&sock->lock);
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_socket_filter(isc_socket_t *sock, const char *filter) {
+ UNUSED(sock);
+ UNUSED(filter);
+
+ REQUIRE(VALID_SOCKET(sock));
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+/*
+ * Set up to listen on a given socket. We do this by creating an internal
+ * event that will be dispatched when the socket has read activity. The
+ * watcher will send the internal event to the task when there is a new
+ * connection.
+ *
+ * Unlike in read, we don't preallocate a done event here. Every time there
+ * is a new connection we'll have to allocate a new one anyway, so we might
+ * as well keep things simple rather than having to track them.
+ */
+isc_result_t
+isc_socket_listen(isc_socket_t *sock, unsigned int backlog) {
+ char strbuf[ISC_STRERRORSIZE];
+#if defined(ENABLE_TCP_FASTOPEN) && defined(TCP_FASTOPEN)
+ char on = 1;
+#endif /* if defined(ENABLE_TCP_FASTOPEN) && defined(TCP_FASTOPEN) */
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ REQUIRE(!sock->listener);
+ REQUIRE(sock->bound);
+ REQUIRE(sock->type == isc_sockettype_tcp);
+
+ if (backlog == 0) {
+ backlog = SOMAXCONN;
+ }
+
+ if (listen(sock->fd, (int)backlog) < 0) {
+ UNLOCK(&sock->lock);
+ strerror_r(WSAGetLastError(), strbuf, sizeof(strbuf));
+
+ UNEXPECTED_ERROR(__FILE__, __LINE__, "listen: %s", strbuf);
+
+ return (ISC_R_UNEXPECTED);
+ }
+
+#if defined(ENABLE_TCP_FASTOPEN) && defined(TCP_FASTOPEN)
+ if (setsockopt(sock->fd, IPPROTO_TCP, TCP_FASTOPEN, &on, sizeof(on)) <
+ 0)
+ {
+ strerror_r(errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "setsockopt(%d, TCP_FASTOPEN) failed with %s",
+ sock->fd, strbuf);
+ /* TCP_FASTOPEN is experimental so ignore failures */
+ }
+#endif /* if defined(ENABLE_TCP_FASTOPEN) && defined(TCP_FASTOPEN) */
+
+ socket_log(__LINE__, sock, NULL, TRACE, "listening");
+ sock->listener = 1;
+ _set_state(sock, SOCK_LISTEN);
+
+ UNLOCK(&sock->lock);
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * This should try to do aggressive accept() XXXMLG
+ */
+isc_result_t
+isc_socket_accept(isc_socket_t *sock, isc_task_t *task, isc_taskaction_t action,
+ void *arg) {
+ isc_socket_newconnev_t *adev;
+ isc_socketmgr_t *manager;
+ isc_task_t *ntask = NULL;
+ isc_socket_t *nsock;
+ isc_result_t result;
+ IoCompletionInfo *lpo;
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ manager = sock->manager;
+ REQUIRE(VALID_MANAGER(manager));
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ REQUIRE(sock->listener);
+
+ /*
+ * Sender field is overloaded here with the task we will be sending
+ * this event to. Just before the actual event is delivered the
+ * actual ev_sender will be touched up to be the socket.
+ */
+ adev = (isc_socket_newconnev_t *)isc_event_allocate(
+ manager->mctx, task, ISC_SOCKEVENT_NEWCONN, action, arg,
+ sizeof(*adev));
+ ISC_LINK_INIT(adev, ev_link);
+
+ result = allocate_socket(manager, sock->type, &nsock);
+ if (result != ISC_R_SUCCESS) {
+ isc_event_free((isc_event_t **)&adev);
+ UNLOCK(&sock->lock);
+ return (result);
+ }
+
+ /*
+ * AcceptEx() requires we pass in a socket.
+ */
+ nsock->fd = socket(sock->pf, SOCK_STREAM, IPPROTO_TCP);
+ if (nsock->fd == INVALID_SOCKET) {
+ free_socket(&nsock, __LINE__);
+ isc_event_free((isc_event_t **)&adev);
+ UNLOCK(&sock->lock);
+ return (ISC_R_FAILURE); /* XXXMLG need real error message */
+ }
+
+ /*
+ * Attach to socket and to task.
+ */
+ isc_task_attach(task, &ntask);
+ if (isc_task_exiting(ntask)) {
+ free_socket(&nsock, __LINE__);
+ isc_task_detach(&ntask);
+ isc_event_free(ISC_EVENT_PTR(&adev));
+ UNLOCK(&sock->lock);
+ return (ISC_R_SHUTTINGDOWN);
+ }
+ isc_refcount_increment0(&nsock->references);
+
+ adev->ev_sender = ntask;
+ adev->newsocket = nsock;
+ _set_state(nsock, SOCK_ACCEPT);
+
+ /*
+ * Queue io completion for an accept().
+ */
+ lpo = (IoCompletionInfo *)HeapAlloc(hHeapHandle, HEAP_ZERO_MEMORY,
+ sizeof(IoCompletionInfo));
+ RUNTIME_CHECK(lpo != NULL);
+ lpo->acceptbuffer =
+ (void *)HeapAlloc(hHeapHandle, HEAP_ZERO_MEMORY,
+ (sizeof(SOCKADDR_STORAGE) + 16) * 2);
+ RUNTIME_CHECK(lpo->acceptbuffer != NULL);
+
+ lpo->adev = adev;
+ lpo->request_type = SOCKET_ACCEPT;
+
+ ISCAcceptEx(sock->fd, nsock->fd, /* Accepted Socket */
+ lpo->acceptbuffer, /* Buffer for initial Recv */
+ 0, /* Length of Buffer */
+ sizeof(SOCKADDR_STORAGE) + 16, /* Local address length + 16
+ */
+ sizeof(SOCKADDR_STORAGE) + 16, /* Remote address length + 16
+ */
+ (LPDWORD)&lpo->received_bytes, /* Bytes Recved */
+ (LPOVERLAPPED)lpo /* Overlapped structure */
+ );
+ iocompletionport_update(nsock);
+
+ socket_log(__LINE__, sock, NULL, TRACE, "accepting for nsock %p fd %d",
+ nsock, nsock->fd);
+
+ /*
+ * Enqueue the event
+ */
+ ISC_LIST_ENQUEUE(sock->accept_list, adev, ev_link);
+ sock->pending_accept++;
+ sock->pending_iocp++;
+
+ UNLOCK(&sock->lock);
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_socket_connect(isc_socket_t *sock, const isc_sockaddr_t *addr,
+ isc_task_t *task, isc_taskaction_t action, void *arg) {
+ char strbuf[ISC_STRERRORSIZE];
+ isc_socket_connev_t *cdev;
+ isc_task_t *ntask = NULL;
+ isc_socketmgr_t *manager;
+ IoCompletionInfo *lpo;
+ int bind_errno;
+
+ REQUIRE(VALID_SOCKET(sock));
+ REQUIRE(addr != NULL);
+ REQUIRE(task != NULL);
+ REQUIRE(action != NULL);
+
+ manager = sock->manager;
+ REQUIRE(VALID_MANAGER(manager));
+ REQUIRE(addr != NULL);
+
+ if (isc_sockaddr_ismulticast(addr)) {
+ return (ISC_R_MULTICAST);
+ }
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ /*
+ * Windows sockets won't connect unless the socket is bound.
+ */
+ if (!sock->bound) {
+ isc_sockaddr_t any;
+
+ isc_sockaddr_anyofpf(&any, isc_sockaddr_pf(addr));
+ if (bind(sock->fd, &any.type.sa, any.length) < 0) {
+ bind_errno = WSAGetLastError();
+ UNLOCK(&sock->lock);
+ switch (bind_errno) {
+ case WSAEACCES:
+ return (ISC_R_NOPERM);
+ case WSAEADDRNOTAVAIL:
+ return (ISC_R_ADDRNOTAVAIL);
+ case WSAEADDRINUSE:
+ return (ISC_R_ADDRINUSE);
+ case WSAEINVAL:
+ return (ISC_R_BOUND);
+ default:
+ strerror_r(bind_errno, strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__, "bind: %s",
+ strbuf);
+ return (ISC_R_UNEXPECTED);
+ }
+ }
+ sock->bound = 1;
+ }
+
+ cdev = (isc_socket_connev_t *)isc_event_allocate(
+ manager->mctx, sock, ISC_SOCKEVENT_CONNECT, action, arg,
+ sizeof(*cdev));
+ ISC_LINK_INIT(cdev, ev_link);
+
+ if (sock->connected) {
+ INSIST(isc_sockaddr_equal(&sock->address, addr));
+ cdev->result = ISC_R_SUCCESS;
+ isc_task_send(task, ISC_EVENT_PTR(&cdev));
+
+ UNLOCK(&sock->lock);
+ return (ISC_R_SUCCESS);
+ }
+
+ if ((sock->type == isc_sockettype_tcp) && !sock->pending_connect) {
+ /*
+ * Queue io completion for an accept().
+ */
+ lpo = (IoCompletionInfo *)HeapAlloc(hHeapHandle,
+ HEAP_ZERO_MEMORY,
+ sizeof(IoCompletionInfo));
+ lpo->cdev = cdev;
+ lpo->request_type = SOCKET_CONNECT;
+
+ sock->address = *addr;
+ ISCConnectEx(sock->fd, &addr->type.sa, addr->length, NULL, 0,
+ NULL, (LPOVERLAPPED)lpo);
+
+ /*
+ * Attach to task.
+ */
+ isc_task_attach(task, &ntask);
+ cdev->ev_sender = ntask;
+
+ sock->pending_connect = 1;
+ _set_state(sock, SOCK_CONNECT);
+
+ /*
+ * Enqueue the request.
+ */
+ INSIST(!ISC_LINK_LINKED(cdev, ev_link));
+ ISC_LIST_ENQUEUE(sock->connect_list, cdev, ev_link);
+ sock->pending_iocp++;
+ } else if (sock->type == isc_sockettype_tcp) {
+ INSIST(sock->pending_connect);
+ INSIST(isc_sockaddr_equal(&sock->address, addr));
+ isc_task_attach(task, &ntask);
+ cdev->ev_sender = ntask;
+ INSIST(!ISC_LINK_LINKED(cdev, ev_link));
+ ISC_LIST_ENQUEUE(sock->connect_list, cdev, ev_link);
+ } else {
+ REQUIRE(!sock->pending_connect);
+ WSAConnect(sock->fd, &addr->type.sa, addr->length, NULL, NULL,
+ NULL, NULL);
+ cdev->result = ISC_R_SUCCESS;
+ isc_task_send(task, (isc_event_t **)&cdev);
+ }
+ CONSISTENT(sock);
+ UNLOCK(&sock->lock);
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_socket_getpeername(isc_socket_t *sock, isc_sockaddr_t *addressp) {
+ isc_result_t result;
+
+ REQUIRE(VALID_SOCKET(sock));
+ REQUIRE(addressp != NULL);
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ if (sock->connected) {
+ *addressp = sock->address;
+ result = ISC_R_SUCCESS;
+ } else {
+ result = ISC_R_NOTCONNECTED;
+ }
+
+ UNLOCK(&sock->lock);
+
+ return (result);
+}
+
+isc_result_t
+isc_socket_getsockname(isc_socket_t *sock, isc_sockaddr_t *addressp) {
+ socklen_t len;
+ isc_result_t result;
+ char strbuf[ISC_STRERRORSIZE];
+
+ REQUIRE(VALID_SOCKET(sock));
+ REQUIRE(addressp != NULL);
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ if (!sock->bound) {
+ result = ISC_R_NOTBOUND;
+ goto out;
+ }
+
+ result = ISC_R_SUCCESS;
+
+ len = sizeof(addressp->type);
+ if (getsockname(sock->fd, &addressp->type.sa, (void *)&len) < 0) {
+ strerror_r(WSAGetLastError(), strbuf, sizeof(strbuf));
+ UNEXPECTED_ERROR(__FILE__, __LINE__, "getsockname: %s", strbuf);
+ result = ISC_R_UNEXPECTED;
+ goto out;
+ }
+ addressp->length = (unsigned int)len;
+
+out:
+ UNLOCK(&sock->lock);
+
+ return (result);
+}
+
+/*
+ * Run through the list of events on this socket, and cancel the ones
+ * queued for task "task" of type "how". "how" is a bitmask.
+ */
+void
+isc_socket_cancel(isc_socket_t *sock, isc_task_t *task, unsigned int how) {
+ REQUIRE(VALID_SOCKET(sock));
+
+ /*
+ * Quick exit if there is nothing to do. Don't even bother locking
+ * in this case.
+ */
+ if (how == 0) {
+ return;
+ }
+
+ LOCK(&sock->lock);
+ CONSISTENT(sock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return;
+ }
+
+ /*
+ * All of these do the same thing, more or less.
+ * Each will:
+ * o If the internal event is marked as "posted" try to
+ * remove it from the task's queue. If this fails, mark it
+ * as canceled instead, and let the task clean it up later.
+ * o For each I/O request for that task of that type, post
+ * its done event with status of "ISC_R_CANCELED".
+ * o Reset any state needed.
+ */
+
+ if ((how & ISC_SOCKCANCEL_RECV) != 0) {
+ isc_socketevent_t *dev;
+ isc_socketevent_t *next;
+ isc_task_t *current_task;
+
+ dev = ISC_LIST_HEAD(sock->recv_list);
+ while (dev != NULL) {
+ current_task = dev->ev_sender;
+ next = ISC_LIST_NEXT(dev, ev_link);
+ if ((task == NULL) || (task == current_task)) {
+ dev->result = ISC_R_CANCELED;
+ send_recvdone_event(sock, &dev);
+ }
+ dev = next;
+ }
+ }
+ how &= ~ISC_SOCKCANCEL_RECV;
+
+ if ((how & ISC_SOCKCANCEL_SEND) != 0) {
+ isc_socketevent_t *dev;
+ isc_socketevent_t *next;
+ isc_task_t *current_task;
+
+ dev = ISC_LIST_HEAD(sock->send_list);
+
+ while (dev != NULL) {
+ current_task = dev->ev_sender;
+ next = ISC_LIST_NEXT(dev, ev_link);
+ if ((task == NULL) || (task == current_task)) {
+ dev->result = ISC_R_CANCELED;
+ send_senddone_event(sock, &dev);
+ }
+ dev = next;
+ }
+ }
+ how &= ~ISC_SOCKCANCEL_SEND;
+
+ if (((how & ISC_SOCKCANCEL_ACCEPT) != 0) &&
+ !ISC_LIST_EMPTY(sock->accept_list))
+ {
+ isc_socket_newconnev_t *dev;
+ isc_socket_newconnev_t *next;
+ isc_task_t *current_task;
+
+ dev = ISC_LIST_HEAD(sock->accept_list);
+ while (dev != NULL) {
+ current_task = dev->ev_sender;
+ next = ISC_LIST_NEXT(dev, ev_link);
+
+ if ((task == NULL) || (task == current_task)) {
+ isc_refcount_decrementz(
+ &dev->newsocket->references);
+ closesocket(dev->newsocket->fd);
+ dev->newsocket->fd = INVALID_SOCKET;
+ free_socket(&dev->newsocket, __LINE__);
+
+ dev->result = ISC_R_CANCELED;
+ send_acceptdone_event(sock, &dev);
+ }
+
+ dev = next;
+ }
+ }
+ how &= ~ISC_SOCKCANCEL_ACCEPT;
+
+ if (((how & ISC_SOCKCANCEL_CONNECT) != 0) &&
+ !ISC_LIST_EMPTY(sock->connect_list))
+ {
+ isc_socket_connev_t *dev;
+ isc_socket_connev_t *next;
+ isc_task_t *current_task;
+
+ INSIST(sock->pending_connect);
+
+ dev = ISC_LIST_HEAD(sock->connect_list);
+
+ while (dev != NULL) {
+ current_task = dev->ev_sender;
+ next = ISC_LIST_NEXT(dev, ev_link);
+ if ((task == NULL) || (task == current_task)) {
+ dev->result = ISC_R_CANCELED;
+ send_connectdone_event(sock, &dev);
+ }
+ dev = next;
+ }
+ closesocket(sock->fd);
+ sock->fd = INVALID_SOCKET;
+ _set_state(sock, SOCK_CLOSED);
+ }
+ how &= ~ISC_SOCKCANCEL_CONNECT;
+ UNUSED(how);
+
+ maybe_free_socket(&sock, __LINE__);
+}
+
+isc_sockettype_t
+isc_socket_gettype(isc_socket_t *sock) {
+ isc_sockettype_t type;
+
+ REQUIRE(VALID_SOCKET(sock));
+
+ LOCK(&sock->lock);
+
+ /*
+ * make sure that the socket's not closed
+ */
+ if (sock->fd == INVALID_SOCKET) {
+ UNLOCK(&sock->lock);
+ return (ISC_R_CONNREFUSED);
+ }
+
+ type = sock->type;
+ UNLOCK(&sock->lock);
+ return (type);
+}
+
+void
+isc_socket_ipv6only(isc_socket_t *sock, bool yes) {
+#if defined(IPV6_V6ONLY)
+ int onoff = yes ? 1 : 0;
+#else /* if defined(IPV6_V6ONLY) */
+ UNUSED(yes);
+#endif /* if defined(IPV6_V6ONLY) */
+
+ REQUIRE(VALID_SOCKET(sock));
+
+#ifdef IPV6_V6ONLY
+ if (sock->pf == AF_INET6) {
+ (void)setsockopt(sock->fd, IPPROTO_IPV6, IPV6_V6ONLY,
+ (char *)&onoff, sizeof(onoff));
+ }
+#endif /* ifdef IPV6_V6ONLY */
+}
+
+void
+isc_socket_dscp(isc_socket_t *sock, isc_dscp_t dscp) {
+#if !defined(IP_TOS) && !defined(IPV6_TCLASS)
+ UNUSED(dscp);
+#else /* if !defined(IP_TOS) && !defined(IPV6_TCLASS) */
+ if (dscp < 0) {
+ return;
+ }
+
+ dscp <<= 2;
+ dscp &= 0xff;
+#endif /* if !defined(IP_TOS) && !defined(IPV6_TCLASS) */
+
+ REQUIRE(VALID_SOCKET(sock));
+
+#ifdef IP_TOS
+ if (sock->pf == AF_INET) {
+ (void)setsockopt(sock->fd, IPPROTO_IP, IP_TOS, (char *)&dscp,
+ sizeof(dscp));
+ }
+#endif /* ifdef IP_TOS */
+#ifdef IPV6_TCLASS
+ if (sock->pf == AF_INET6) {
+ (void)setsockopt(sock->fd, IPPROTO_IPV6, IPV6_TCLASS,
+ (char *)&dscp, sizeof(dscp));
+ }
+#endif /* ifdef IPV6_TCLASS */
+}
+
+void
+isc_socket_cleanunix(const isc_sockaddr_t *addr, bool active) {
+ UNUSED(addr);
+ UNUSED(active);
+}
+
+isc_result_t
+isc_socket_permunix(const isc_sockaddr_t *addr, uint32_t perm, uint32_t owner,
+ uint32_t group) {
+ UNUSED(addr);
+ UNUSED(perm);
+ UNUSED(owner);
+ UNUSED(group);
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+void
+isc_socket_setname(isc_socket_t *socket, const char *name, void *tag) {
+ /*
+ * Name 'socket'.
+ */
+
+ REQUIRE(VALID_SOCKET(socket));
+
+ LOCK(&socket->lock);
+ strlcpy(socket->name, name, sizeof(socket->name));
+ socket->tag = tag;
+ UNLOCK(&socket->lock);
+}
+
+const char *
+isc_socket_getname(isc_socket_t *socket) {
+ return (socket->name);
+}
+
+void *
+isc_socket_gettag(isc_socket_t *socket) {
+ return (socket->tag);
+}
+
+int
+isc_socket_getfd(isc_socket_t *socket) {
+ return ((short)socket->fd);
+}
+
+void
+isc_socketmgr_setreserved(isc_socketmgr_t *manager, uint32_t reserved) {
+ UNUSED(manager);
+ UNUSED(reserved);
+}
+
+isc_socketevent_t *
+isc_socket_socketevent(isc_mem_t *mctx, void *sender, isc_eventtype_t eventtype,
+ isc_taskaction_t action, void *arg) {
+ return (allocate_socketevent(mctx, sender, eventtype, action, arg));
+}
+
+bool
+isc_socket_hasreuseport() {
+ return (false);
+}
+
+#ifdef HAVE_LIBXML2
+
+static const char *
+_socktype(isc_sockettype_t type) {
+ switch (type) {
+ case isc_sockettype_udp:
+ return ("udp");
+ case isc_sockettype_tcp:
+ return ("tcp");
+ case isc_sockettype_unix:
+ return ("unix");
+ default:
+ return ("not-initialized");
+ }
+}
+
+#define TRY0(a) \
+ do { \
+ xmlrc = (a); \
+ if (xmlrc < 0) \
+ goto error; \
+ } while (0)
+int
+isc_socketmgr_renderxml(isc_socketmgr_t *mgr, void *writer0) {
+ isc_socket_t *sock = NULL;
+ char peerbuf[ISC_SOCKADDR_FORMATSIZE];
+ isc_sockaddr_t addr;
+ socklen_t len;
+ int xmlrc;
+ xmlTextWriterPtr writer = (xmlTextWriterPtr)writer0;
+
+ LOCK(&mgr->lock);
+
+ TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "sockets"));
+ sock = ISC_LIST_HEAD(mgr->socklist);
+ while (sock != NULL) {
+ LOCK(&sock->lock);
+ TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "socket"));
+
+ TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "id"));
+ TRY0(xmlTextWriterWriteFormatString(writer, "%p", sock));
+ TRY0(xmlTextWriterEndElement(writer));
+
+ if (sock->name[0] != 0) {
+ TRY0(xmlTextWriterStartElement(writer,
+ ISC_XMLCHAR "name"));
+ TRY0(xmlTextWriterWriteFormatString(writer, "%s",
+ sock->name));
+ TRY0(xmlTextWriterEndElement(writer)); /* name */
+ }
+
+ TRY0(xmlTextWriterStartElement(writer,
+ ISC_XMLCHAR "references"));
+ TRY0(xmlTextWriterWriteFormatString(
+ writer, "%" PRIuFAST32,
+ isc_refcount_current(&sock->references)));
+ TRY0(xmlTextWriterEndElement(writer));
+
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "type",
+ ISC_XMLCHAR _socktype(sock->type)));
+
+ if (sock->connected) {
+ isc_sockaddr_format(&sock->address, peerbuf,
+ sizeof(peerbuf));
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "peer-address",
+ ISC_XMLCHAR peerbuf));
+ }
+
+ len = sizeof(addr);
+ if (getsockname(sock->fd, &addr.type.sa, (void *)&len) == 0) {
+ isc_sockaddr_format(&addr, peerbuf, sizeof(peerbuf));
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "local-address",
+ ISC_XMLCHAR peerbuf));
+ }
+
+ TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "states"));
+ if (sock->pending_recv) {
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "state",
+ ISC_XMLCHAR "pending-receive"));
+ }
+ if (sock->pending_send) {
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "state",
+ ISC_XMLCHAR "pending-send"));
+ }
+ if (sock->pending_accept) {
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "state",
+ ISC_XMLCHAR "pending_accept"));
+ }
+ if (sock->listener) {
+ TRY0(xmlTextWriterWriteElement(writer,
+ ISC_XMLCHAR "state",
+ ISC_XMLCHAR "listener"));
+ }
+ if (sock->connected) {
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "state",
+ ISC_XMLCHAR "connected"));
+ }
+ if (sock->pending_connect) {
+ TRY0(xmlTextWriterWriteElement(
+ writer, ISC_XMLCHAR "state",
+ ISC_XMLCHAR "connecting"));
+ }
+ if (sock->bound) {
+ TRY0(xmlTextWriterWriteElement(writer,
+ ISC_XMLCHAR "state",
+ ISC_XMLCHAR "bound"));
+ }
+
+ TRY0(xmlTextWriterEndElement(writer)); /* states */
+
+ TRY0(xmlTextWriterEndElement(writer)); /* socket */
+
+ UNLOCK(&sock->lock);
+ sock = ISC_LIST_NEXT(sock, link);
+ }
+ TRY0(xmlTextWriterEndElement(writer)); /* sockets */
+
+error:
+ if (sock != NULL) {
+ UNLOCK(&sock->lock);
+ }
+
+ UNLOCK(&mgr->lock);
+
+ return (xmlrc);
+}
+#endif /* HAVE_LIBXML2 */
+
+#ifdef HAVE_JSON_C
+#define CHECKMEM(m) \
+ do { \
+ if (m == NULL) { \
+ result = ISC_R_NOMEMORY; \
+ goto error; \
+ } \
+ } while (0)
+isc_result_t
+isc_socketmgr_renderjson(isc_socketmgr_t *mgr, void *stats0) {
+ isc_result_t result = ISC_R_SUCCESS;
+ isc_socket_t *sock = NULL;
+ char peerbuf[ISC_SOCKADDR_FORMATSIZE];
+ isc_sockaddr_t addr;
+ socklen_t len;
+ json_object *obj, *array = json_object_new_array();
+ json_object *stats = (json_object *)stats;
+
+ CHECKMEM(array);
+
+ LOCK(&mgr->lock);
+
+#ifdef USE_SHARED_MANAGER
+ obj = json_object_new_int(mgr->refs);
+ CHECKMEM(obj);
+ json_object_object_add(stats, "references", obj);
+#endif /* USE_SHARED_MANAGER */
+
+ sock = ISC_LIST_HEAD(mgr->socklist);
+ while (sock != NULL) {
+ json_object *states, *entry = json_object_new_object();
+ char buf[255];
+
+ CHECKMEM(entry);
+ json_object_array_add(array, entry);
+
+ LOCK(&sock->lock);
+
+ snprintf(buf, sizeof(buf), "%p", sock);
+ obj = json_object_new_string(buf);
+ CHECKMEM(obj);
+ json_object_object_add(entry, "id", obj);
+
+ if (sock->name[0] != 0) {
+ obj = json_object_new_string(sock->name);
+ CHECKMEM(obj);
+ json_object_object_add(entry, "name", obj);
+ }
+
+ obj = json_object_new_int(
+ isc_refcount_current(&sock->references));
+ CHECKMEM(obj);
+ json_object_object_add(entry, "references", obj);
+
+ obj = json_object_new_string(_socktype(sock->type));
+ CHECKMEM(obj);
+ json_object_object_add(entry, "type", obj);
+
+ if (sock->connected) {
+ isc_sockaddr_format(&sock->address, peerbuf,
+ sizeof(peerbuf));
+ obj = json_object_new_string(peerbuf);
+ CHECKMEM(obj);
+ json_object_object_add(entry, "peer-address", obj);
+ }
+
+ len = sizeof(addr);
+ if (getsockname(sock->fd, &addr.type.sa, (void *)&len) == 0) {
+ isc_sockaddr_format(&addr, peerbuf, sizeof(peerbuf));
+ obj = json_object_new_string(peerbuf);
+ CHECKMEM(obj);
+ json_object_object_add(entry, "local-address", obj);
+ }
+
+ states = json_object_new_array();
+ CHECKMEM(states);
+ json_object_object_add(entry, "states", states);
+
+ if (sock->pending_recv) {
+ obj = json_object_new_string("pending-receive");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->pending_send) {
+ obj = json_object_new_string("pending-send");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->pending_accept) {
+ obj = json_object_new_string("pending-accept");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->listener) {
+ obj = json_object_new_string("listener");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->connected) {
+ obj = json_object_new_string("connected");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->pending_connect) {
+ obj = json_object_new_string("connecting");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ if (sock->bound) {
+ obj = json_object_new_string("bound");
+ CHECKMEM(obj);
+ json_object_array_add(states, obj);
+ }
+
+ UNLOCK(&sock->lock);
+ sock = ISC_LIST_NEXT(sock, link);
+ }
+
+ json_object_object_add(stats, "sockets", array);
+ array = NULL;
+ result = ISC_R_SUCCESS;
+
+error:
+ if (array != NULL) {
+ json_object_put(array);
+ }
+
+ if (sock != NULL) {
+ UNLOCK(&sock->lock);
+ }
+
+ UNLOCK(&mgr->lock);
+
+ return (result);
+}
+#endif /* HAVE_JSON_C */
+
+void
+isc_socketmgr_maxudp(isc_socketmgr_t *manager, unsigned int maxudp) {
+ REQUIRE(VALID_MANAGER(manager));
+
+ manager->maxudp = maxudp;
+}