diff options
Diffstat (limited to 'usr.sbin/bind/lib/isc/win32/socket.c')
| -rw-r--r-- | usr.sbin/bind/lib/isc/win32/socket.c | 3434 |
1 files changed, 0 insertions, 3434 deletions
diff --git a/usr.sbin/bind/lib/isc/win32/socket.c b/usr.sbin/bind/lib/isc/win32/socket.c deleted file mode 100644 index fa5e8cb5dd2..00000000000 --- a/usr.sbin/bind/lib/isc/win32/socket.c +++ /dev/null @@ -1,3434 +0,0 @@ -/* - * Copyright (C) 2000-2002 Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM - * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL - * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING - * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, - * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION - * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -/* $ISC: socket.c,v 1.5.2.7 2002/07/31 03:10:58 mayer Exp $ */ - - -#define MAKE_EXTERNAL 1 -#include <config.h> - -#include <sys/types.h> - -#ifndef _WINSOCKAPI_ -#define _WINSOCKAPI_ /* Prevent inclusion of winsock.h in windows.h */ -#endif - -#include <errno.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <io.h> -#include <fcntl.h> - -#include <isc/buffer.h> -#include <isc/bufferlist.h> -#include <isc/condition.h> -#include <isc/list.h> -#include <isc/log.h> -#include <isc/mem.h> -#include <isc/msgs.h> -#include <isc/mutex.h> -#include <isc/net.h> -#include <isc/platform.h> -#include <isc/print.h> -#include <isc/region.h> -#include <isc/socket.h> -#include <isc/task.h> -#include <isc/thread.h> -#include <isc/util.h> - -#include "errno2result.h" - -#define MAX_SELECT_SECONDS 0 -#define MAX_SELECT_MILLISECONDS 40 -/* - * Some systems define the socket length argument as an int, some as size_t, - * some as socklen_t. This is here so it can be easily changed if needed. - */ -#ifndef ISC_SOCKADDR_LEN_T -#define ISC_SOCKADDR_LEN_T unsigned int -#endif - -/* - * Define what the possible "soft" errors can be. These are non-fatal returns - * of various network related functions, like recv() and so on. - * - * For some reason, BSDI (and perhaps others) will sometimes return <0 - * from recv() but will have errno==0. This is broken, but we have to - * work around it here. - */ -#define SOFT_ERROR(e) ((e) == WSAEINTR || \ - (e) == WSAEWOULDBLOCK || \ - (e) == EWOULDBLOCK || \ - (e) == EINTR || \ - (e) == EAGAIN || \ - (e) == 0) - -#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; - -#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. - */ -#ifdef ISC_PLATFORM_HAVEIPV6 -#ifndef USE_CMSG -#define USE_CMSG 1 -#endif -#endif - -/* - * NetBSD and FreeBSD can timestamp packets. XXXMLG Should we have - * a setsockopt() like interface to request timestamps, and if the OS - * doesn't do it for us, call gettimeofday() on every UDP receive? - */ -#ifdef SO_TIMESTAMP -#ifndef USE_CMSG -#define USE_CMSG 1 -#endif -#endif - -/* - * Check to see if we have even basic support for cracking messages from - * the control data returned from/sent via recvmsg()/sendmsg(). - */ -#if defined(USE_CMSG) && (!defined(CMSG_LEN) || !defined(CMSG_SPACE)) -#undef USE_CMSG -#endif - -/* - * We really don't want to try and use these control messages. Win32 - * doesn't have this mechanism - */ -#undef USE_CMSG - -/* - * Message header for recvmsg and sendmsg calls. - * Used value-result for recvmsg, value only for sendmsg. - */ -struct iovec { - void *iov_base; /* starting address of buffer */ - size_t iov_len; /* size of buffer */ -}; - -struct msghdr { - void *msg_name; /* optional address */ - u_int msg_namelen; /* size of 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 */ - int msg_flags; /* flags on received message */ -} msghdr; - -/* - * The number of times a send operation is repeated if the result is EINTR. - */ -#define NRETRIES 10 - -struct isc_socket { - /* Not locked. */ - unsigned int magic; - isc_socketmgr_t *manager; - isc_mutex_t lock; - isc_sockettype_t type; - - /* Locked by socket lock. */ - ISC_LINK(isc_socket_t) link; - unsigned int references; - int fd; - int pf; - - ISC_LIST(isc_socketevent_t) send_list; - ISC_LIST(isc_socketevent_t) recv_list; - ISC_LIST(isc_socket_newconnev_t) accept_list; - isc_socket_connev_t *connect_ev; - - /* - * Internal events. Posted when a descriptor is readable or - * writable. These are statically allocated and never freed. - * They will be set to non-purgable before use. - */ - intev_t readable_ev; - intev_t writable_ev; - - isc_sockaddr_t address; /* remote address */ - - unsigned int pending_recv : 1, - pending_send : 1, - pending_accept : 1, - listener : 1, /* listener socket */ - connected : 1, - connecting : 1, /* connect pending */ - bound : 1; /* bound to local addr */ - -#ifdef ISC_NET_RECVOVERFLOW - unsigned char overflow; /* used for MSG_TRUNC fake */ -#endif -}; - -#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; - /* Locked by manager lock. */ - ISC_LIST(isc_socket_t) socklist; - fd_set read_fds; - fd_set write_fds; - fd_set except_fds; - isc_socket_t *fds[FD_SETSIZE]; - int fdstate[FD_SETSIZE]; - int maxfd; - int minfd; - isc_thread_t watcher; - isc_condition_t shutdown_ok; - int pipe_fds[2]; -}; - -#define CLOSED 0 /* this one must be zero */ -#define MANAGED 1 -#define CLOSE_PENDING 2 - -/* - * send() and recv() iovec counts - */ -#define MAXSCATTERGATHER_SEND (ISC_SOCKET_MAXSCATTERGATHER) -#ifdef ISC_NET_RECVOVERFLOW -# define MAXSCATTERGATHER_RECV (ISC_SOCKET_MAXSCATTERGATHER + 1) -#else -# define MAXSCATTERGATHER_RECV (ISC_SOCKET_MAXSCATTERGATHER) -#endif - -static void send_recvdone_event(isc_socket_t *, isc_socketevent_t **); -static void send_senddone_event(isc_socket_t *, isc_socketevent_t **); -static void free_socket(isc_socket_t **); -static isc_result_t allocate_socket(isc_socketmgr_t *, isc_sockettype_t, - isc_socket_t **); -static void destroy(isc_socket_t **); -static void internal_accept(isc_task_t *, isc_event_t *); -static void internal_connect(isc_task_t *, isc_event_t *); -static void internal_recv(isc_task_t *, isc_event_t *); -static void internal_send(isc_task_t *, isc_event_t *); -static void process_cmsg(isc_socket_t *, struct msghdr *, isc_socketevent_t *); -static void build_msghdr_send(isc_socket_t *, isc_socketevent_t *, - struct msghdr *, char *cmsg, - WSABUF *, size_t *); -static void build_msghdr_recv(isc_socket_t *, isc_socketevent_t *, - struct msghdr *, char *cmsg, - WSABUF *, size_t *); - -#define SELECT_POKE_SHUTDOWN (-1) -#define SELECT_POKE_NOTHING (-2) -#define SELECT_POKE_READ (-3) -#define SELECT_POKE_ACCEPT (-3) /* Same as _READ */ -#define SELECT_POKE_WRITE (-4) -#define SELECT_POKE_CONNECT (-5) -#define SELECT_POKE_CLOSE (-6) - -long bpipe_written = 0; - -#define SOCK_DEAD(s) ((s)->references == 0) - -/* - * Routine to handle error messages - */ - -#define ISC_STRERRORSIZE 128 - -void -isc__strerror(int num, char *buf, size_t size) { - char *msg; - unsigned int unum = num; - - REQUIRE(buf != NULL); - - msg = NTstrerror(num); - if (msg != NULL) - snprintf(buf, size, "%s", msg); - else - snprintf(buf, size, "Unknown error: %u", unum); -} - - -/* - * The following routines are here to handle Unix emulation until we - * can rewrite the the routines in Winsock2 style. - */ - -/* - * Initialize socket services - */ -BOOL InitSockets() { - WORD wVersionRequested; - WSADATA wsaData; - int err; - - /* Need Winsock 2.0 or better */ - wVersionRequested = MAKEWORD(2, 0); - - err = WSAStartup(wVersionRequested, &wsaData); - if ( err != 0 ) { - /* Tell the user that we could not find a usable Winsock DLL */ - return (FALSE); - } - - return (TRUE); -} - -int -internal_pipe(int filedes[2]) { - int status; - unsigned int pipesize = 65535; - int mode = _O_TEXT; - - status = _pipe(filedes, pipesize, mode); - return (status); - InterlockedExchange(&bpipe_written, 0); -} - -int -internal_sendmsg(int sock, const struct msghdr *msg, int flags, int *merror) { - DWORD BytesSent; - DWORD Flags = flags; - - *merror = WSASendTo((SOCKET) sock, - msg->msg_iov, - msg->msg_iovlen, - &BytesSent, - Flags, - msg->msg_name, - msg->msg_namelen, - NULL, - NULL); - - if (*merror == SOCKET_ERROR) { - BytesSent = -1; - /* There is an error... */ - *merror = WSAGetLastError(); - if (*merror == WSA_IO_PENDING) { - /* Overlapped send successfully initiated. */ - errno = EAGAIN; - } else { - /* An unexpected error occurred. */ - errno = *merror; - } - } - - /* No error -- the I/O request was completed immediately... */ - return (BytesSent); -} - -int -internal_recvmsg(int sock, struct msghdr *msg, int flags, int *merror) { - DWORD Flags = flags; - DWORD NumBytes; - int Result; - - Result = WSARecvFrom((SOCKET) sock, - msg->msg_iov, - msg->msg_iovlen, - &NumBytes, - &Flags, - msg->msg_name, - (int *)&(msg->msg_namelen), - NULL, - NULL); - - - /* Check for errors. */ - if (Result == SOCKET_ERROR) { - *merror = WSAGetLastError(); - NumBytes = -1; - - switch (*merror) { - case WSAEWOULDBLOCK: - /* - * No data received; return to wait for another - * read event. - */ - errno = EAGAIN; - break; - - default: - /* Some other error... hit the panic button. */ - errno = *merror; - break; - } - } - msg->msg_flags = Flags; /* Return the flags received in header */ - - return (NumBytes); -} - -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(isc_socket_t *sock, isc_sockaddr_t *address, - isc_logcategory_t *category, isc_logmodule_t *module, int level, - isc_msgcat_t *msgcat, int msgset, int message, - const char *fmt, ...) ISC_FORMAT_PRINTF(9, 10); -static void -socket_log(isc_socket_t *sock, isc_sockaddr_t *address, - isc_logcategory_t *category, isc_logmodule_t *module, int level, - isc_msgcat_t *msgcat, int msgset, int message, - 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_iwrite(isc_lctx, category, module, level, - msgcat, msgset, message, - "socket %p: %s", sock, msgbuf); - } else { - isc_sockaddr_format(address, peerbuf, sizeof(peerbuf)); - isc_log_iwrite(isc_lctx, category, module, level, - msgcat, msgset, message, - "socket %p %s: %s", sock, peerbuf, msgbuf); - } -} - -static void -wakeup_socket(isc_socketmgr_t *manager, int fd, int msg) { - isc_socket_t *sock; - - /* - * This is a wakeup on a socket. If the socket is not in the - * process of being closed, start watching it for either reads - * or writes. - */ - - INSIST(fd >= 0 && fd < FD_SETSIZE); - - if (manager->fdstate[fd] == CLOSE_PENDING) { - manager->fdstate[fd] = CLOSED; - FD_CLR(fd, &manager->read_fds); - FD_CLR(fd, &manager->write_fds); - FD_CLR(fd, &manager->except_fds); - closesocket(fd); - return; - } - if (manager->fdstate[fd] != MANAGED) - return; - - sock = manager->fds[fd]; - - /* - * If there are no events, or there is an event but we - * have already queued up the internal event on a task's - * queue, clear the bit. Otherwise, set it. - */ - if (msg == SELECT_POKE_READ) - FD_SET(sock->fd, &manager->read_fds); - if (msg == SELECT_POKE_WRITE) - FD_SET(sock->fd, &manager->write_fds); - if (msg == SELECT_POKE_CONNECT) { /* Need both here */ - FD_SET(sock->fd, &manager->write_fds); - FD_SET(sock->fd, &manager->except_fds); - } -} - -/* - * Poke the select loop when there is something for us to do. - * The write is required (by POSIX) to complete. That is, we - * will not get partial writes. - */ -static void -select_poke(isc_socketmgr_t *mgr, int fd, int msg) { - int cc; - int buf[2]; - char strbuf[ISC_STRERRORSIZE]; - - buf[0] = fd; - buf[1] = msg; - - if (msg == SELECT_POKE_SHUTDOWN) { - do { - cc = _write(mgr->pipe_fds[1], buf, sizeof(buf)); - } while (cc < 0 && SOFT_ERROR(errno)); - - if (cc < 0) { - isc__strerror(errno, strbuf, sizeof(strbuf)); - FATAL_ERROR(__FILE__, __LINE__, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_WRITEFAILED, - "write() failed " - "during watcher poke: %s"), - strbuf); - } - - INSIST(cc == sizeof(buf)); - - InterlockedIncrement(&bpipe_written); - } else { - wakeup_socket(mgr, fd, msg); - } -} - -/* - * Read a message on the internal fd. - */ -static void -select_readmsg(isc_socketmgr_t *mgr, int *fd, int *msg) { - int buf[2]; - int cc; - char strbuf[ISC_STRERRORSIZE]; - - cc = _read(mgr->pipe_fds[0], buf, sizeof(buf)); - if (cc < 0) { - *msg = SELECT_POKE_NOTHING; - if (SOFT_ERROR(errno)) - return; - - isc__strerror(errno, strbuf, sizeof(strbuf)); - FATAL_ERROR(__FILE__, __LINE__, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_READFAILED, - "read() failed " - "during watcher poke: %s"), - strbuf); - - return; - } - INSIST(cc == sizeof(buf)); - *fd = buf[0]; - *msg = buf[1]; - -} -/* - * Make a fd non-blocking. - */ -static isc_result_t -make_nonblock(int fd) { - int ret; - unsigned long flags = 1; - char strbuf[ISC_STRERRORSIZE]; - - /* Set the socket to non-blocking */ - ret = ioctlsocket((SOCKET) fd, FIONBIO, &flags); - - if (ret == -1) { - isc__strerror(WSAGetLastError(), strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "ioctlsocket(%d, FIOBIO, %d): %s", - fd, flags, strbuf); - - return (ISC_R_UNEXPECTED); - } - - return (ISC_R_SUCCESS); -} - -/* - * Process control messages received on a socket. - */ -static void -process_cmsg(isc_socket_t *sock, struct msghdr *msg, isc_socketevent_t *dev) { -#ifdef USE_CMSG - struct cmsghdr *cmsgp; -#ifdef ISC_PLATFORM_HAVEIPV6 - struct in6_pktinfo *pktinfop; -#endif -#ifdef SO_TIMESTAMP - struct timeval *timevalp; -#endif -#endif - - /* - * sock is used only when ISC_NET_BSD44MSGHDR and USE_CMSG are defined. - * msg and dev are used only when ISC_NET_BSD44MSGHDR is defined. - * They are all here, outside of the CPP tests, because it is - * more consistent with the usual ISC coding style. - */ - UNUSED(sock); - UNUSED(msg); - UNUSED(dev); - -#ifndef ISC_NET_BSD44MSGHDR - return; - -#else /* defined ISC_NET_BSD44MSGHDR */ - -#ifdef MSG_TRUNC - if ((msg->msg_flags & MSG_TRUNC) == MSG_TRUNC) - dev->attributes |= ISC_SOCKEVENTATTR_TRUNC; -#endif - -#ifdef MSG_CTRUNC - if ((msg->msg_flags & MSG_CTRUNC) == MSG_CTRUNC) - dev->attributes |= ISC_SOCKEVENTATTR_CTRUNC; -#endif - -#ifndef USE_CMSG - return; -#else - if (msg->msg_controllen == 0 || msg->msg_control == NULL) - return; - -#ifdef SO_TIMESTAMP - timevalp = NULL; -#endif -#ifdef ISC_PLATFORM_HAVEIPV6 - pktinfop = NULL; -#endif - - cmsgp = CMSG_FIRSTHDR(msg); - while (cmsgp != NULL) { - socket_log(sock, NULL, TRACE, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_PROCESSCMSG, - "processing cmsg %p", cmsgp); - -#ifdef ISC_PLATFORM_HAVEIPV6 - if (cmsgp->cmsg_level == IPPROTO_IPV6 - && cmsgp->cmsg_type == IPV6_PKTINFO) { - - pktinfop = (struct in6_pktinfo *)CMSG_DATA(cmsgp); - memcpy(&dev->pktinfo, pktinfop, - sizeof(struct in6_pktinfo)); - dev->attributes |= ISC_SOCKEVENTATTR_PKTINFO; - socket_log(sock, NULL, TRACE, - isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_IFRECEIVED, - "interface received on ifindex %u", - dev->pktinfo.ipi6_ifindex); - if (IN6_IS_ADDR_MULTICAST(&pktinfop->ipi6_addr)) - dev->attributes |= ISC_SOCKEVENTATTR_MULTICAST; - goto next; - } -#endif - -#ifdef SO_TIMESTAMP - if (cmsgp->cmsg_level == SOL_SOCKET - && cmsgp->cmsg_type == SCM_TIMESTAMP) { - timevalp = (struct timeval *)CMSG_DATA(cmsgp); - dev->timestamp.seconds = timevalp->tv_sec; - dev->timestamp.nanoseconds = timevalp->tv_usec * 1000; - dev->attributes |= ISC_SOCKEVENTATTR_TIMESTAMP; - goto next; - } -#endif - - next: - cmsgp = CMSG_NXTHDR(msg, cmsgp); - } -#endif /* USE_CMSG */ - -#endif /* ISC_NET_BSD44MSGHDR */ - -} - -/* - * 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. - * - * If write_countp != NULL, *write_countp will hold the number of bytes - * this transaction can send. - */ -static void -build_msghdr_send(isc_socket_t *sock, isc_socketevent_t *dev, - struct msghdr *msg, char *cmsg, - WSABUF *iov, size_t *write_countp) -{ - unsigned int iovcount; - isc_buffer_t *buffer; - isc_region_t used; - size_t write_count; - size_t skip_count; - -#ifndef USE_CMSG - UNUSED(cmsg); -#endif - - memset(msg, 0, sizeof (*msg)); - - if (sock->type == isc_sockettype_udp) { - msg->msg_name = (void *)&dev->address.type.sa; - msg->msg_namelen = dev->address.length; - } else { - msg->msg_name = NULL; - msg->msg_namelen = 0; - } - - buffer = ISC_LIST_HEAD(dev->bufferlist); - write_count = 0; - iovcount = 0; - - /* - * Single buffer I/O? Skip what we've done so far in this region. - */ - if (buffer == NULL) { - write_count = dev->region.length - dev->n; - iov[0].buf = (void *)(dev->region.base + dev->n); - iov[0].len = write_count; - iovcount = 1; - - goto config; - } - - /* - * Multibuffer I/O. - * Skip the data in the buffer list that we have already written. - */ - skip_count = dev->n; - while (buffer != NULL) { - REQUIRE(ISC_BUFFER_VALID(buffer)); - if (skip_count < isc_buffer_usedlength(buffer)) - break; - skip_count -= isc_buffer_usedlength(buffer); - buffer = ISC_LIST_NEXT(buffer, link); - } - - while (buffer != NULL) { - INSIST(iovcount < MAXSCATTERGATHER_SEND); - - isc_buffer_usedregion(buffer, &used); - - if (used.length > 0) { - iov[iovcount].buf = (void *)(used.base - + skip_count); - iov[iovcount].len = used.length - skip_count; - write_count += (used.length - skip_count); - skip_count = 0; - iovcount++; - } - buffer = ISC_LIST_NEXT(buffer, link); - } - - INSIST(skip_count == 0); - - config: - msg->msg_iov = iov; - msg->msg_iovlen = iovcount; - -#ifdef ISC_NET_BSD44MSGHDR - msg->msg_control = NULL; - msg->msg_controllen = 0; - msg->msg_flags = 0; -#if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIPV6) - if ((sock->type == isc_sockettype_udp) - && ((dev->attributes & ISC_SOCKEVENTATTR_PKTINFO) != 0)) { - struct cmsghdr *cmsgp; - struct in6_pktinfo *pktinfop; - - socket_log(sock, NULL, TRACE, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_SENDTODATA, - "sendto pktinfo data, ifindex %u", - dev->pktinfo.ipi6_ifindex); - - msg->msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); - msg->msg_control = (void *)cmsg; - - cmsgp = (struct cmsghdr *)cmsg; - cmsgp->cmsg_level = IPPROTO_IPV6; - cmsgp->cmsg_type = IPV6_PKTINFO; - cmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); - pktinfop = (struct in6_pktinfo *)CMSG_DATA(cmsgp); - memcpy(pktinfop, &dev->pktinfo, sizeof(struct in6_pktinfo)); - } -#endif /* USE_CMSG && ISC_PLATFORM_HAVEIPV6 */ -#endif /* ISC_NET_BSD44MSGHDR */ - - if (write_countp != NULL) - *write_countp = write_count; -} - -/* - * Construct an iov array and attach it to the msghdr passed in. This is - * the RECV constructor, which will use the available 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. - * - * If read_countp != NULL, *read_countp will hold the number of bytes - * this transaction can receive. - */ -static void -build_msghdr_recv(isc_socket_t *sock, isc_socketevent_t *dev, - struct msghdr *msg, char *cmsg, - WSABUF *iov, size_t *read_countp) -{ - unsigned int iovcount; - isc_buffer_t *buffer; - isc_region_t available; - size_t read_count; - -#ifndef USE_CMSG - UNUSED(cmsg); -#endif - - memset(msg, 0, sizeof (struct msghdr)); - - if (sock->type == isc_sockettype_udp) { - memset(&dev->address, 0, sizeof(dev->address)); - msg->msg_name = (void *)&dev->address.type.sa; - msg->msg_namelen = sizeof(dev->address.type); -#ifdef ISC_NET_RECVOVERFLOW - /* If needed, steal one iovec for overflow detection. */ - maxiov--; -#endif - } else { /* TCP */ - msg->msg_name = NULL; - msg->msg_namelen = 0; - dev->address = sock->address; - } - - buffer = ISC_LIST_HEAD(dev->bufferlist); - read_count = 0; - - /* - * Single buffer I/O? Skip what we've done so far in this region. - */ - if (buffer == NULL) { - read_count = dev->region.length - dev->n; - iov[0].buf = (void *)(dev->region.base + dev->n); - iov[0].len = read_count; - iovcount = 1; - } else { - /* - * Multibuffer I/O. - * Skip empty buffers. - */ - while (buffer != NULL) { - REQUIRE(ISC_BUFFER_VALID(buffer)); - if (isc_buffer_availablelength(buffer) != 0) - break; - buffer = ISC_LIST_NEXT(buffer, link); - } - - iovcount = 0; - while (buffer != NULL) { - INSIST(iovcount < MAXSCATTERGATHER_RECV); - - isc_buffer_availableregion(buffer, &available); - - if (available.length > 0) { - iov[iovcount].buf = (void *)(available.base); - iov[iovcount].len = available.length; - read_count += available.length; - iovcount++; - } - buffer = ISC_LIST_NEXT(buffer, link); - } - } - - /* - * If needed, set up to receive that one extra byte. Note that - * we know there is at least one iov left, since we stole it - * at the top of this function. - */ -#ifdef ISC_NET_RECVOVERFLOW - if (sock->type == isc_sockettype_udp) { - iov[iovcount].iov_base = (void *)(&sock->overflow); - iov[iovcount].iov_len = 1; - iovcount++; - } -#endif - - msg->msg_iov = iov; - msg->msg_iovlen = iovcount; - -#ifdef ISC_NET_BSD44MSGHDR - msg->msg_control = NULL; - msg->msg_controllen = 0; - msg->msg_flags = 0; -#if defined(USE_CMSG) - if (sock->type == isc_sockettype_udp) { - msg->msg_control = cmsg; - msg->msg_controllen = CMSG_BUF_SIZE; - } -#endif /* USE_CMSG */ -#endif /* ISC_NET_BSD44MSGHDR */ - - if (read_countp != NULL) - *read_countp = read_count; -} - -static void -set_dev_address(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 isc_socketevent_t * -allocate_socketevent(isc_socket_t *sock, isc_eventtype_t eventtype, - isc_taskaction_t action, const void *arg) -{ - isc_socketevent_t *ev; - - ev = (isc_socketevent_t *)isc_event_allocate(sock->manager->mctx, - sock, eventtype, - action, arg, - sizeof (*ev)); - - if (ev == NULL) - return (NULL); - - ev->result = ISC_R_UNEXPECTED; - ISC_LINK_INIT(ev, ev_link); - ISC_LIST_INIT(ev->bufferlist); - ev->region.base = NULL; - ev->n = 0; - ev->offset = 0; - ev->attributes = 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 #: %d\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%d\tbase %p, len %d\n", i, - msg->msg_iov[i].buf, - msg->msg_iov[i].len); -#ifdef ISC_NET_BSD44MSGHDR - printf("\tcontrol %p, controllen %d\n", msg->msg_control, - msg->msg_controllen); -#endif -} -#endif - -#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 */ - -static int -doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) { - int cc; - WSABUF iov[MAXSCATTERGATHER_RECV]; - size_t read_count; - size_t actual_count; - struct msghdr msghdr; - isc_buffer_t *buffer; - int recv_errno = 0; -#if USE_CMSG - char cmsg[CMSG_BUF_SIZE]; -#else - char *cmsg = NULL; -#endif - char strbuf[ISC_STRERRORSIZE]; - - build_msghdr_recv(sock, dev, &msghdr, cmsg, iov, &read_count); - -#if defined(ISC_SOCKET_DEBUG) - dump_msg(&msghdr,sock); -#endif - - cc = internal_recvmsg(sock->fd, &msghdr, 0, &recv_errno); - - if (cc < 0) { - if (SOFT_ERROR(recv_errno)) - return (DOIO_SOFT); - - if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) { - isc__strerror(recv_errno, strbuf, sizeof(strbuf)); - socket_log(sock, NULL, IOEVENT, - isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_DOIORECV, - "doio_recv: recvmsg(%d) %d bytes, err %d/%s", - sock->fd, cc, recv_errno, strbuf); - } - -#define SOFT_OR_HARD(_system, _isc) \ - if (recv_errno == _system) { \ - if (sock->connected) { \ - dev->result = _isc; \ - return (DOIO_HARD); \ - } \ - return (DOIO_SOFT); \ - } -#define ALWAYS_HARD(_system, _isc) \ - if (recv_errno == _system) { \ - dev->result = _isc; \ - return (DOIO_HARD); \ - } - - SOFT_OR_HARD(WSAECONNREFUSED, ISC_R_CONNREFUSED); - SOFT_OR_HARD(WSAENETUNREACH, ISC_R_NETUNREACH); - SOFT_OR_HARD(WSAEHOSTUNREACH, ISC_R_HOSTUNREACH); - SOFT_OR_HARD(WSAECONNRESET, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAENETRESET, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAEDISCON, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAENETDOWN, ISC_R_NETDOWN); - ALWAYS_HARD(WSAENOBUFS, ISC_R_NORESOURCES); - -#undef SOFT_OR_HARD -#undef ALWAYS_HARD - - dev->result = isc__errno2result(recv_errno); - return (DOIO_HARD); - } - - /* - * On TCP, zero length reads indicate EOF, while on - * UDP, zero length reads are perfectly valid, although - * strange. - */ - if ((sock->type == isc_sockettype_tcp) && (cc == 0)) - return (DOIO_EOF); - - if (sock->type == isc_sockettype_udp) { - dev->address.length = msghdr.msg_namelen; - if (isc_sockaddr_getport(&dev->address) == 0) { - if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) { - socket_log(sock, &dev->address, IOEVENT, - isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_ZEROPORT, - "dropping source port zero packet"); - } - return (DOIO_SOFT); - } - } - - socket_log(sock, &dev->address, IOEVENT, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_PKTRECV, - "packet received correctly"); - - /* - * Overflow bit detection. If we received MORE bytes than we should, - * this indicates an overflow situation. Set the flag in the - * dev entry and adjust how much we read by one. - */ -#ifdef ISC_NET_RECVOVERFLOW - if ((sock->type == isc_sockettype_udp) && ((size_t)cc > read_count)) { - dev->attributes |= ISC_SOCKEVENTATTR_TRUNC; - cc--; - } -#endif - - /* - * If there are control messages attached, run through them and pull - * out the interesting bits. - */ - if (sock->type == isc_sockettype_udp) - process_cmsg(sock, &msghdr, dev); - - /* - * update the buffers (if any) and the i/o count - */ - dev->n += cc; - actual_count = cc; - buffer = ISC_LIST_HEAD(dev->bufferlist); - while (buffer != NULL && actual_count > 0) { - REQUIRE(ISC_BUFFER_VALID(buffer)); - if (isc_buffer_availablelength(buffer) <= actual_count) { - actual_count -= isc_buffer_availablelength(buffer); - isc_buffer_add(buffer, - isc_buffer_availablelength(buffer)); - } else { - isc_buffer_add(buffer, actual_count); - actual_count = 0; - break; - } - buffer = ISC_LIST_NEXT(buffer, link); - if (buffer == NULL) { - INSIST(actual_count == 0); - } - } - - /* - * If we read less than we expected, update counters, - * and let the upper layer poke the descriptor. - */ - if (((size_t)cc != read_count) && (dev->n < dev->minimum)) - return (DOIO_SOFT); - - /* - * Full reads are posted, or partials if partials are ok. - */ - dev->result = ISC_R_SUCCESS; - return (DOIO_SUCCESS); -} - -/* - * 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 -doio_send(isc_socket_t *sock, isc_socketevent_t *dev) { - int cc; - WSABUF iov[MAXSCATTERGATHER_SEND]; - size_t write_count; - struct msghdr msghdr; - char addrbuf[ISC_SOCKADDR_FORMATSIZE]; -#if USE_CMSG - char cmsg[CMSG_BUF_SIZE]; -#else - char *cmsg = NULL; -#endif - int attempts = 0; - int send_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - - build_msghdr_send(sock, dev, &msghdr, cmsg, iov, &write_count); - -resend: - cc = internal_sendmsg(sock->fd, &msghdr, 0, &send_errno); - - /* - * Check for error or block condition. - */ - if (cc < 0) { - if (send_errno == WSAEINTR && ++attempts < NRETRIES) - goto resend; - - if (SOFT_ERROR(send_errno)) - return (DOIO_SOFT); - -#define SOFT_OR_HARD(_system, _isc) \ - if (send_errno == _system) { \ - if (sock->connected) { \ - dev->result = _isc; \ - return (DOIO_HARD); \ - } \ - return (DOIO_SOFT); \ - } -#define ALWAYS_HARD(_system, _isc) \ - if (send_errno == _system) { \ - dev->result = _isc; \ - return (DOIO_HARD); \ - } - - SOFT_OR_HARD(WSAEACCES, ISC_R_NOPERM); - SOFT_OR_HARD(WSAEAFNOSUPPORT, ISC_R_ADDRNOTAVAIL); - SOFT_OR_HARD(WSAECONNREFUSED, ISC_R_CONNREFUSED); - SOFT_OR_HARD(WSAENOTCONN, ISC_R_CONNREFUSED); - SOFT_OR_HARD(WSAECONNRESET, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAENETRESET, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAEDISCON, ISC_R_CONNECTIONRESET); - SOFT_OR_HARD(WSAENETDOWN, ISC_R_NETDOWN); - ALWAYS_HARD(WSAEADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL); - ALWAYS_HARD(WSAEHOSTUNREACH, ISC_R_HOSTUNREACH); - ALWAYS_HARD(WSAEHOSTDOWN, ISC_R_HOSTUNREACH); - ALWAYS_HARD(WSAENETUNREACH, ISC_R_NETUNREACH); - ALWAYS_HARD(WSAENOBUFS, ISC_R_NORESOURCES); - ALWAYS_HARD(EPERM, ISC_R_HOSTUNREACH); - ALWAYS_HARD(EPIPE, ISC_R_NOTCONNECTED); - -#undef SOFT_OR_HARD -#undef ALWAYS_HARD - - /* - * The other error types depend on whether or not the - * socket is UDP or TCP. If it is UDP, some errors - * that we expect to be fatal under TCP are merely - * annoying, and are really soft errors. - * - * However, these soft errors are still returned as - * a status. - */ - isc_sockaddr_format(&dev->address, addrbuf, sizeof(addrbuf)); - isc__strerror(send_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, "internal_send: %s: %s", - addrbuf, strbuf); - dev->result = isc__errno2result(send_errno); - return (DOIO_HARD); - } - - if (cc == 0) - UNEXPECTED_ERROR(__FILE__, __LINE__, - "internal_send: send() %s 0", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_RETURNED, "returned")); - - /* - * If we write less than we expected, update counters, poke. - */ - dev->n += cc; - if ((size_t)cc != write_count) - 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); -} - -/* - * Kill. - * - * Caller must ensure that the socket is not locked and no external - * references exist. - */ -static void -destroy(isc_socket_t **sockp) { - isc_socket_t *sock = *sockp; - isc_socketmgr_t *manager = sock->manager; - - socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_DESTROYING, "destroying"); - - INSIST(ISC_LIST_EMPTY(sock->accept_list)); - INSIST(ISC_LIST_EMPTY(sock->recv_list)); - INSIST(ISC_LIST_EMPTY(sock->send_list)); - INSIST(sock->connect_ev == NULL); - REQUIRE(sock->fd >= 0 && sock->fd < FD_SETSIZE); - - LOCK(&manager->lock); - - /* - * No one has this socket open, so the watcher doesn't have to be - * poked, and the socket doesn't have to be locked. - */ - manager->fds[sock->fd] = NULL; - manager->fdstate[sock->fd] = CLOSE_PENDING; - select_poke(manager, sock->fd, SELECT_POKE_CLOSE); - ISC_LIST_UNLINK(manager->socklist, sock, link); - -#ifdef ISC_PLATFORM_USETHREADS - if (ISC_LIST_EMPTY(manager->socklist)) - SIGNAL(&manager->shutdown_ok); -#endif /* ISC_PLATFORM_USETHREADS */ - - /* - * XXX should reset manager->maxfd here - */ - - UNLOCK(&manager->lock); - - free_socket(sockp); -} - -static isc_result_t -allocate_socket(isc_socketmgr_t *manager, isc_sockettype_t type, - isc_socket_t **socketp) -{ - isc_socket_t *sock; - isc_result_t ret; - - sock = isc_mem_get(manager->mctx, sizeof(*sock)); - - if (sock == NULL) - return (ISC_R_NOMEMORY); - - ret = ISC_R_UNEXPECTED; - - sock->magic = 0; - sock->references = 0; - - sock->manager = manager; - sock->type = type; - sock->fd = -1; - - 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); - sock->connect_ev = NULL; - sock->pending_recv = 0; - sock->pending_send = 0; - sock->pending_accept = 0; - sock->listener = 0; - sock->connected = 0; - sock->connecting = 0; - sock->bound = 0; - - /* - * initialize the lock - */ - if (isc_mutex_init(&sock->lock) != ISC_R_SUCCESS) { - sock->magic = 0; - UNEXPECTED_ERROR(__FILE__, __LINE__, - "isc_mutex_init() %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); - ret = ISC_R_UNEXPECTED; - goto error; - } - - /* - * Initialize readable and writable events - */ - ISC_EVENT_INIT(&sock->readable_ev, sizeof(intev_t), - ISC_EVENTATTR_NOPURGE, NULL, ISC_SOCKEVENT_INTR, - NULL, sock, sock, NULL, NULL); - ISC_EVENT_INIT(&sock->writable_ev, sizeof(intev_t), - ISC_EVENTATTR_NOPURGE, NULL, ISC_SOCKEVENT_INTW, - NULL, sock, sock, NULL, NULL); - - sock->magic = SOCKET_MAGIC; - *socketp = sock; - - return (ISC_R_SUCCESS); - - error: /* socket allocated */ - - return (ret); -} - -/* - * This event requires that the various lists be empty, that the reference - * count be 1, and that the magic number is valid. The other socket bits, - * like the lock, must be initialized as well. The fd associated must be - * marked as closed, by setting it to -1 on close, or this routine will - * also close the socket. - */ -static void -free_socket(isc_socket_t **socketp) { - isc_socket_t *sock = *socketp; - - INSIST(sock->references == 0); - INSIST(VALID_SOCKET(sock)); - INSIST(!sock->connecting); - INSIST(!sock->pending_recv); - INSIST(!sock->pending_send); - INSIST(!sock->pending_accept); - INSIST(ISC_LIST_EMPTY(sock->recv_list)); - INSIST(ISC_LIST_EMPTY(sock->send_list)); - INSIST(ISC_LIST_EMPTY(sock->accept_list)); - INSIST(!ISC_LINK_LINKED(sock, link)); - - sock->magic = 0; - - DESTROYLOCK(&sock->lock); - - isc_mem_put(sock->manager->mctx, sock, sizeof(*sock)); - - *socketp = NULL; -} - -/* - * 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'. - */ -isc_result_t -isc_socket_create(isc_socketmgr_t *manager, int pf, isc_sockettype_t type, - isc_socket_t **socketp) { - isc_socket_t *sock = NULL; - isc_result_t ret; -#if defined(USE_CMSG) || defined(SO_BSDCOMPAT) - int on = 1; -#endif - int socket_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - - REQUIRE(VALID_MANAGER(manager)); - REQUIRE(socketp != NULL && *socketp == NULL); - - ret = allocate_socket(manager, type, &sock); - if (ret != ISC_R_SUCCESS) - return (ret); - - sock->pf = pf; - switch (type) { - case isc_sockettype_udp: - sock->fd = socket(pf, SOCK_DGRAM, IPPROTO_UDP); - break; - case isc_sockettype_tcp: - sock->fd = socket(pf, SOCK_STREAM, IPPROTO_TCP); - break; - } - - if (sock->fd >= FD_SETSIZE) { - (void)closesocket(sock->fd); - isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL, - ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR, - isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_TOOMANYFDS, - "%s: too many open file descriptors", "socket"); - free_socket(&sock); - return (ISC_R_NORESOURCES); - } - - if (sock->fd < 0) { - socket_errno = WSAGetLastError(); - free_socket(&sock); - - switch (socket_errno) { - case WSAEMFILE: - case WSAENOBUFS: - return (ISC_R_NORESOURCES); - - case WSAEPROTONOSUPPORT: - case WSAEPFNOSUPPORT: - case WSAEAFNOSUPPORT: - return (ISC_R_FAMILYNOSUPPORT); - - default: - isc__strerror(socket_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "socket() %s: %s", - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - return (ISC_R_UNEXPECTED); - } - } - - if (make_nonblock(sock->fd) != ISC_R_SUCCESS) { - free_socket(&sock); - return (ISC_R_UNEXPECTED); - } - -#ifdef SO_BSDCOMPAT - if (setsockopt(sock->fd, SOL_SOCKET, SO_BSDCOMPAT, - (void *)&on, sizeof(on)) < 0) { - socket_errno = WSAGetLastError(); - isc__strerror(socket_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "setsockopt(%d, SO_BSDCOMPAT) %s: %s", - sock->fd, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed"), - strbuf); - /* Press on... */ - } -#endif - -#if defined(USE_CMSG) - if (type == isc_sockettype_udp) { - -#if defined(SO_TIMESTAMP) - if (setsockopt(sock->fd, SOL_SOCKET, SO_TIMESTAMP, - (void *)&on, sizeof(on)) < 0 - && WSAGetLastError() != WSAENOPROTOOPT) { - isc__strerror(WSAGetLastError(), strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "setsockopt(%d, SO_TIMESTAMP) %s: %s", - sock->fd, - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - /* Press on... */ - } -#endif /* SO_TIMESTAMP */ - -#if defined(ISC_PLATFORM_HAVEIPV6) -#ifdef IPV6_RECVPKTINFO - /* 2292bis */ - if ((pf == AF_INET6) - && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, - (void *)&on, sizeof (on)) < 0)) { - isc__strerror(WSAGetLastError(), strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "setsockopt(%d, IPV6_RECVPKTINFO) " - "%s: %s", sock->fd, - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - } -#else - /* 2292 */ - if ((pf == AF_INET6) - && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_PKTINFO, - (void *)&on, sizeof (on)) < 0)) { - isc__strerror(WSAGetLaastError(), strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "setsockopt(%d, IPV6_PKTINFO) %s: %s", - sock->fd, - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - } -#endif /* IPV6_RECVPKTINFO */ -#ifdef IPV6_USE_MIN_MTU /*2292bis, not too common yet*/ - /* use minimum MTU */ - if (pf == AF_INET6) { - (void)setsockopt(sock->fd, IPPROTO_IPV6, - IPV6_USE_MIN_MTU, - (void *)&on, sizeof (on)); - } -#endif -#endif /* ISC_PLATFORM_HAVEIPV6 */ - - } -#endif /* USE_CMSG */ - - sock->references = 1; - *socketp = sock; - - LOCK(&manager->lock); - - /* - * Note we don't have to lock the socket like we normally would because - * there are no external references to it yet. - */ - - manager->fds[sock->fd] = sock; - manager->fdstate[sock->fd] = MANAGED; - ISC_LIST_APPEND(manager->socklist, sock, link); - if (manager->maxfd < sock->fd) - manager->maxfd = sock->fd; - manager->minfd = min(manager->minfd, sock->fd); - - UNLOCK(&manager->lock); - - socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_CREATED, "created %u", sock->fd); - - return (ISC_R_SUCCESS); -} - -/* - * 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); - sock->references++; - UNLOCK(&sock->lock); - - *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; - isc_boolean_t kill_socket = ISC_FALSE; - - REQUIRE(socketp != NULL); - sock = *socketp; - REQUIRE(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - REQUIRE(sock->references > 0); - sock->references--; - if (sock->references == 0) - kill_socket = ISC_TRUE; - UNLOCK(&sock->lock); - - if (kill_socket) - destroy(&sock); - - *socketp = NULL; -} - -/* - * I/O is possible on a given socket. Schedule an event to this task that - * will call an internal function to do the I/O. This will charge the - * task with the I/O operation and let our select loop handler get back - * to doing something real as fast as possible. - * - * The socket and manager must be locked before calling this function. - */ -static void -dispatch_recv(isc_socket_t *sock) { - intev_t *iev; - isc_socketevent_t *ev; - - INSIST(!sock->pending_recv); - - ev = ISC_LIST_HEAD(sock->recv_list); - if (ev == NULL) - return; - - sock->pending_recv = 1; - iev = &sock->readable_ev; - - socket_log(sock, NULL, EVENT, NULL, 0, 0, - "dispatch_recv: event %p -> task %p", ev, ev->ev_sender); - - sock->references++; - iev->ev_sender = sock; - iev->ev_action = internal_recv; - iev->ev_arg = sock; - - isc_task_send(ev->ev_sender, (isc_event_t **)&iev); -} - -static void -dispatch_send(isc_socket_t *sock) { - intev_t *iev; - isc_socketevent_t *ev; - - INSIST(!sock->pending_send); - - ev = ISC_LIST_HEAD(sock->send_list); - if (ev == NULL) - return; - - sock->pending_send = 1; - iev = &sock->writable_ev; - - socket_log(sock, NULL, EVENT, NULL, 0, 0, - "dispatch_send: event %p -> task %p", ev, ev->ev_sender); - - sock->references++; - iev->ev_sender = sock; - iev->ev_action = internal_send; - iev->ev_arg = sock; - - isc_task_send(ev->ev_sender, (isc_event_t **)&iev); -} - -/* - * Dispatch an internal accept event. - */ -static void -dispatch_accept(isc_socket_t *sock) { - intev_t *iev; - isc_socket_newconnev_t *ev; - - INSIST(!sock->pending_accept); - - /* - * Are there any done events left, or were they all canceled - * before the manager got the socket lock? - */ - ev = ISC_LIST_HEAD(sock->accept_list); - if (ev == NULL) - return; - - sock->pending_accept = 1; - iev = &sock->readable_ev; - - sock->references++; /* keep socket around for this internal event */ - iev->ev_sender = sock; - iev->ev_action = internal_accept; - iev->ev_arg = sock; - - isc_task_send(ev->ev_sender, (isc_event_t **)&iev); -} - -static void -dispatch_connect(isc_socket_t *sock) { - intev_t *iev; - isc_socket_connev_t *ev; - - iev = &sock->writable_ev; - - ev = sock->connect_ev; - INSIST(ev != NULL); /* XXX */ - - INSIST(sock->connecting); - - sock->references++; /* keep socket around for this internal event */ - iev->ev_sender = sock; - iev->ev_action = internal_connect; - iev->ev_arg = sock; - - isc_task_send(ev->ev_sender, (isc_event_t **)&iev); -} - -/* - * 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 socket 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) - == ISC_SOCKEVENTATTR_ATTACHED) - isc_task_sendanddetach(&task, (isc_event_t **)dev); - else - isc_task_send(task, (isc_event_t **)dev); -} - -/* - * See comments for send_recvdone_event() above. - * - * Caller must have the socket locked if the event is attached to the socket. - */ -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) - == ISC_SOCKEVENTATTR_ATTACHED) - isc_task_sendanddetach(&task, (isc_event_t **)dev); - else - isc_task_send(task, (isc_event_t **)dev); -} - -/* - * Call accept() on a socket, to get the new file descriptor. The listen - * socket is used as a prototype to create a new isc_socket_t. The new - * socket has one outstanding reference. The task receiving the event - * will be detached from just after the event is delivered. - * - * 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 unlock and return. - */ -static void -internal_accept(isc_task_t *me, isc_event_t *ev) { - isc_socket_t *sock; - isc_socketmgr_t *manager; - isc_socket_newconnev_t *dev; - isc_task_t *task; - ISC_SOCKADDR_LEN_T addrlen; - int fd; - isc_result_t result = ISC_R_SUCCESS; - int accept_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - - UNUSED(me); - - sock = ev->ev_sender; - INSIST(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - socket_log(sock, NULL, TRACE, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_ACCEPTLOCK, - "internal_accept called, locked socket"); - - manager = sock->manager; - INSIST(VALID_MANAGER(manager)); - - INSIST(sock->listener); - INSIST(sock->pending_accept == 1); - sock->pending_accept = 0; - - INSIST(sock->references > 0); - sock->references--; /* the internal event is done with this socket */ - if (sock->references == 0) { - UNLOCK(&sock->lock); - destroy(&sock); - return; - } - - /* - * Get the first item off the accept list. - * If it is empty, unlock the socket and return. - */ - dev = ISC_LIST_HEAD(sock->accept_list); - if (dev == NULL) { - UNLOCK(&sock->lock); - return; - } - - /* - * Try to accept the new connection. If the accept fails with - * EAGAIN or EINTR, simply poke the watcher to watch this socket - * again. - */ - addrlen = sizeof(dev->newsocket->address.type); - memset(&dev->newsocket->address.type.sa, 0, addrlen); - fd = accept(sock->fd, &dev->newsocket->address.type.sa, - (void *)&addrlen); - if (fd < 0) { - accept_errno = WSAGetLastError(); - if (SOFT_ERROR(accept_errno) || accept_errno == WSAECONNRESET) { - goto soft_error; - } else { - isc__strerror(accept_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "internal_accept: accept() %s: %s", - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - fd = -1; - result = ISC_R_UNEXPECTED; - } - } else { - if (addrlen == 0) { - UNEXPECTED_ERROR(__FILE__, __LINE__, - "internal_accept(): " - "accept() failed to return " - "remote address"); - - (void)closesocket(fd); - goto soft_error; - } else if (dev->newsocket->address.type.sa.sa_family != - sock->pf) - { - UNEXPECTED_ERROR(__FILE__, __LINE__, - "internal_accept(): " - "accept() returned peer address " - "family %u (expected %u)", - dev->newsocket->address. - type.sa.sa_family, - sock->pf); - (void)closesocket(fd); - goto soft_error; - } else if (fd >= FD_SETSIZE) { - isc_log_iwrite(isc_lctx, ISC_LOGCATEGORY_GENERAL, - ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR, - isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_TOOMANYFDS, - "%s: too many open file descriptors", - "accept"); - (void)closesocket(fd); - goto soft_error; - } - } - - if (fd != -1) { - dev->newsocket->address.length = addrlen; - dev->newsocket->pf = sock->pf; - } - - /* - * Pull off the done event. - */ - ISC_LIST_UNLINK(sock->accept_list, dev, ev_link); - - /* - * Poke watcher if there are more pending accepts. - */ - if (!ISC_LIST_EMPTY(sock->accept_list)) - select_poke(sock->manager, sock->fd, SELECT_POKE_ACCEPT); - - UNLOCK(&sock->lock); - - if (fd != -1 && (make_nonblock(fd) != ISC_R_SUCCESS)) { - closesocket(fd); - fd = -1; - result = ISC_R_UNEXPECTED; - } - - /* - * -1 means the new socket didn't happen. - */ - if (fd != -1) { - LOCK(&manager->lock); - ISC_LIST_APPEND(manager->socklist, dev->newsocket, link); - - dev->newsocket->fd = fd; - dev->newsocket->bound = 1; - dev->newsocket->connected = 1; - - /* - * Save away the remote address - */ - dev->address = dev->newsocket->address; - - manager->fds[fd] = dev->newsocket; - manager->fdstate[fd] = MANAGED; - if (manager->maxfd < fd) - manager->maxfd = fd; - manager->minfd = min(manager->minfd, sock->fd); - - socket_log(sock, &dev->newsocket->address, CREATION, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_ACCEPTEDCXN, - "accepted connection, new socket %p", - dev->newsocket); - - UNLOCK(&manager->lock); - } else { - dev->newsocket->references--; - free_socket(&dev->newsocket); - } - - /* - * Fill in the done event details and send it off. - */ - dev->result = result; - task = dev->ev_sender; - dev->ev_sender = sock; - - isc_task_sendanddetach(&task, (isc_event_t **)&dev); - return; - - soft_error: - select_poke(sock->manager, sock->fd, SELECT_POKE_ACCEPT); - UNLOCK(&sock->lock); - return; -} - -static void -internal_recv(isc_task_t *me, isc_event_t *ev) { - isc_socketevent_t *dev; - isc_socket_t *sock; - - INSIST(ev->ev_type == ISC_SOCKEVENT_INTR); - - sock = ev->ev_sender; - INSIST(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - socket_log(sock, NULL, IOEVENT, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALRECV, - "internal_recv: task %p got event %p", me, ev); - - INSIST(sock->pending_recv == 1); - sock->pending_recv = 0; - - INSIST(sock->references > 0); - sock->references--; /* the internal event is done with this socket */ - if (sock->references == 0) { - UNLOCK(&sock->lock); - destroy(&sock); - return; - } - - /* - * Try to do as much I/O as possible on this socket. There are no - * limits here, currently. - */ - dev = ISC_LIST_HEAD(sock->recv_list); - while (dev != NULL) { - switch (doio_recv(sock, dev)) { - case DOIO_SOFT: - goto poke; - - case DOIO_EOF: - /* - * read of 0 means the remote end was closed. - * Run through the event queue and dispatch all - * the events with an EOF result code. - */ - do { - dev->result = ISC_R_EOF; - send_recvdone_event(sock, &dev); - dev = ISC_LIST_HEAD(sock->recv_list); - } while (dev != NULL); - goto poke; - - case DOIO_SUCCESS: - case DOIO_HARD: - send_recvdone_event(sock, &dev); - break; - } - - dev = ISC_LIST_HEAD(sock->recv_list); - } - - poke: - if (!ISC_LIST_EMPTY(sock->recv_list)) - select_poke(sock->manager, sock->fd, SELECT_POKE_READ); - - UNLOCK(&sock->lock); -} - -static void -internal_send(isc_task_t *me, isc_event_t *ev) { - isc_socketevent_t *dev; - isc_socket_t *sock; - - INSIST(ev->ev_type == ISC_SOCKEVENT_INTW); - - /* - * Find out what socket this is and lock it. - */ - sock = (isc_socket_t *)ev->ev_sender; - INSIST(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - socket_log(sock, NULL, IOEVENT, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_INTERNALSEND, - "internal_send: task %p got event %p", me, ev); - - INSIST(sock->pending_send == 1); - sock->pending_send = 0; - - INSIST(sock->references > 0); - sock->references--; /* the internal event is done with this socket */ - if (sock->references == 0) { - UNLOCK(&sock->lock); - destroy(&sock); - return; - } - - /* - * Try to do as much I/O as possible on this socket. There are no - * limits here, currently. - */ - dev = ISC_LIST_HEAD(sock->send_list); - while (dev != NULL) { - switch (doio_send(sock, dev)) { - case DOIO_SOFT: - goto poke; - - case DOIO_HARD: - case DOIO_SUCCESS: - send_senddone_event(sock, &dev); - break; - } - - dev = ISC_LIST_HEAD(sock->send_list); - } - - poke: - if (!ISC_LIST_EMPTY(sock->send_list)) - select_poke(sock->manager, sock->fd, SELECT_POKE_WRITE); - - UNLOCK(&sock->lock); -} - -static void -process_fds(isc_socketmgr_t *manager, int maxfd, int minfd, - fd_set *readfds, fd_set *writefds, fd_set *exceptfds) -{ - int i; - isc_socket_t *sock; - isc_boolean_t unlock_sock; - BOOL conn_check = FALSE; - - REQUIRE(maxfd <= FD_SETSIZE); - - /* - * Process read/writes on other fds here. Avoid locking - * and unlocking twice if both reads and writes are possible. - */ - for (i = minfd ; i <= maxfd ; i++) { - if (manager->fdstate[i] == CLOSE_PENDING) { - manager->fdstate[i] = CLOSED; - FD_CLR(i, &manager->read_fds); - FD_CLR(i, &manager->write_fds); - FD_CLR(i, &manager->except_fds); - - closesocket(i); - - continue; - } - - sock = manager->fds[i]; - unlock_sock = ISC_FALSE; - if (FD_ISSET(i, readfds)) { - if (sock == NULL) { - FD_CLR(i, &manager->read_fds); - goto check_write; - } - unlock_sock = ISC_TRUE; - LOCK(&sock->lock); - if (!SOCK_DEAD(sock)) { - if (sock->listener) - dispatch_accept(sock); - else - dispatch_recv(sock); - } - FD_CLR(i, &manager->read_fds); - } - check_write: - if (FD_ISSET(i, writefds)) { - if (sock == NULL) { - FD_CLR(i, &manager->write_fds); - continue; - } - if (!unlock_sock) { - unlock_sock = ISC_TRUE; - LOCK(&sock->lock); - } - if (!SOCK_DEAD(sock)) { - if (sock->connecting) { - dispatch_connect(sock); - conn_check = TRUE; - } - else - dispatch_send(sock); - } - FD_CLR(i, &manager->write_fds); - FD_CLR(i, &manager->except_fds); - } - if (FD_ISSET(i, exceptfds)) { - if (sock == NULL) { - FD_CLR(i, &manager->except_fds); - continue; - } - if (!unlock_sock) { - unlock_sock = ISC_TRUE; - LOCK(&sock->lock); - } - if (!SOCK_DEAD(sock)) { - if (sock->connecting) { - dispatch_connect(sock); - conn_check = TRUE; - } - } - FD_CLR(i, &manager->write_fds); - FD_CLR(i, &manager->except_fds); - } - - if (unlock_sock) - UNLOCK(&sock->lock); - } -} - -#ifdef ISC_PLATFORM_USETHREADS -/* - * This is the thread that will loop forever, always in a select or poll - * call. - * - * When select returns something to do, track down what thread gets to do - * this I/O and post the event to it. - */ -static isc_threadresult_t WINAPI -watcher(void *uap) { - isc_socketmgr_t *manager = uap; - isc_boolean_t done; - int ctlfd; - int cc; - fd_set readfds; - fd_set writefds; - fd_set exceptfds; - int msg, fd; - int maxfd; - int minfd; - int watcher_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - - /* Timeout on select in case it's necesasary */ - struct timeval tv; - tv.tv_sec = MAX_SELECT_SECONDS; - tv.tv_usec = MAX_SELECT_MILLISECONDS*1000; - - /* - * Get the control fd here. This will never change. - */ - LOCK(&manager->lock); - ctlfd = manager->pipe_fds[0]; - - done = ISC_FALSE; - while (!done) { - do { - readfds = manager->read_fds; - writefds = manager->write_fds; - exceptfds = manager->except_fds; - maxfd = manager->maxfd; /* Pipe not included */ - minfd = manager->minfd; - watcher_errno = 0; - - UNLOCK(&manager->lock); - - if(maxfd > 0) { - cc = select(maxfd, &readfds, &writefds, - &exceptfds, &tv); - if (cc < 0 && bpipe_written <= 0) { - watcher_errno = WSAGetLastError(); - if (!SOFT_ERROR(watcher_errno) && - watcher_errno != WSAEINVAL) { - isc__strerror(watcher_errno, - strbuf, sizeof(strbuf)); - FATAL_ERROR(__FILE__, __LINE__, - "select() %s: %s", - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, - "failed"), - strbuf); - } - } - - } else { - /* - * Nothing to select on yet, so sleep - * and check again for work - */ - Sleep(MAX_SELECT_SECONDS*1000 - + MAX_SELECT_MILLISECONDS); - } - - LOCK(&manager->lock); - } while (cc < 0 && bpipe_written <= 0); - - - /* - * Process reads on internal, control fd. - */ - while (bpipe_written > 0) { - select_readmsg(manager, &fd, &msg); - InterlockedDecrement(&bpipe_written); - - manager_log(manager, IOEVENT, - isc_msgcat_get(isc_msgcat, - ISC_MSGSET_SOCKET, - ISC_MSG_WATCHERMSG, - "watcher got message %d"), - msg); - - /* - * Nothing to read? - */ - if (msg == SELECT_POKE_NOTHING) - break; - - /* - * Handle shutdown message. We really should - * jump out of this loop right away, but - * it doesn't matter if we have to do a little - * more work first. - */ - if (msg == SELECT_POKE_SHUTDOWN) { - done = ISC_TRUE; - - break; - } - } - process_fds(manager, maxfd, minfd, &readfds, &writefds, &exceptfds); - } - - manager_log(manager, TRACE, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_EXITING, "watcher exiting")); - - UNLOCK(&manager->lock); - return ((isc_threadresult_t)0); -} -#endif /* ISC_PLATFORM_USETHREADS */ - -/* - * Create a new socket manager. - */ -isc_result_t -isc_socketmgr_create(isc_mem_t *mctx, isc_socketmgr_t **managerp) { - isc_socketmgr_t *manager; -#ifdef ISC_PLATFORM_USETHREADS - char strbuf[ISC_STRERRORSIZE]; -#endif - - REQUIRE(managerp != NULL && *managerp == NULL); - -#ifndef ISC_PLATFORM_USETHREADS - if (socketmgr != NULL) { - socketmgr->refs++; - *managerp = socketmgr; - return (ISC_R_SUCCESS); - } -#endif /* ISC_PLATFORM_USETHREADS */ - - manager = isc_mem_get(mctx, sizeof(*manager)); - if (manager == NULL) - return (ISC_R_NOMEMORY); - - manager->magic = SOCKET_MANAGER_MAGIC; - manager->mctx = NULL; - memset(manager->fds, 0, sizeof(manager->fds)); - ISC_LIST_INIT(manager->socklist); - if (isc_mutex_init(&manager->lock) != ISC_R_SUCCESS) { - isc_mem_put(mctx, manager, sizeof(*manager)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "isc_mutex_init() %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); - return (ISC_R_UNEXPECTED); - } - if (isc_condition_init(&manager->shutdown_ok) != ISC_R_SUCCESS) { - DESTROYLOCK(&manager->lock); - isc_mem_put(mctx, manager, sizeof(*manager)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "isc_condition_init() %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); - return (ISC_R_UNEXPECTED); - } - - /* - * Create the special fds that will be used to wake up the - * select/poll loop when something internal needs to be done. - */ - if (internal_pipe(manager->pipe_fds) != 0) { - DESTROYLOCK(&manager->lock); - isc_mem_put(mctx, manager, sizeof(*manager)); - isc__strerror(errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "pipe() %s: %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed"), - strbuf); - - return (ISC_R_UNEXPECTED); - } - - - /* - * Set up initial state for the select loop - */ - FD_ZERO(&manager->read_fds); - FD_ZERO(&manager->write_fds); - FD_ZERO(&manager->except_fds); - manager->maxfd = 0; - manager->minfd = FD_SETSIZE; - memset(manager->fdstate, 0, sizeof(manager->fdstate)); - - /* - * Start up the select/poll thread. - */ - if (isc_thread_create(watcher, manager, &manager->watcher) != - ISC_R_SUCCESS) { - DESTROYLOCK(&manager->lock); - isc_mem_put(mctx, manager, sizeof(*manager)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "isc_thread_create() %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); - _close(manager->pipe_fds[0]); - _close(manager->pipe_fds[1]); - return (ISC_R_UNEXPECTED); - } - isc_mem_attach(mctx, &manager->mctx); - - *managerp = manager; - - return (ISC_R_SUCCESS); -} - -void -isc_socketmgr_destroy(isc_socketmgr_t **managerp) { - isc_socketmgr_t *manager; - int i; - isc_mem_t *mctx; - - /* - * Destroy a socket manager. - */ - - REQUIRE(managerp != NULL); - manager = *managerp; - REQUIRE(VALID_MANAGER(manager)); - -#ifndef ISC_PLATFORM_USETHREADS - if (manager->refs > 1) { - manager->refs--; - *managerp = NULL; - return; - } -#endif /* ISC_PLATFORM_USETHREADS */ - - LOCK(&manager->lock); - -#ifdef ISC_PLATFORM_USETHREADS - /* - * Wait for all sockets to be destroyed. - */ - while (!ISC_LIST_EMPTY(manager->socklist)) { - manager_log(manager, CREATION, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_SOCKETSREMAIN, - "sockets exist")); - WAIT(&manager->shutdown_ok, &manager->lock); - } -#else /* ISC_PLATFORM_USETHREADS */ - /* - * Hope all sockets have been destroyed. - */ - if (!ISC_LIST_EMPTY(manager->socklist)) { - manager_log(manager, CREATION, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_SOCKETSREMAIN, - "sockets exist")); - INSIST(0); - } -#endif /* ISC_PLATFORM_USETHREADS */ - - UNLOCK(&manager->lock); - - /* - * Here, poke our select/poll thread. Do this by closing the write - * half of the pipe, which will send EOF to the read half. - * This is currently a no-op in the non-threaded case. - */ - select_poke(manager, 0, SELECT_POKE_SHUTDOWN); - -#ifdef ISC_PLATFORM_USETHREADS - /* - * Wait for thread to exit. - */ - if (isc_thread_join(manager->watcher, NULL) != ISC_R_SUCCESS) - UNEXPECTED_ERROR(__FILE__, __LINE__, - "isc_thread_join() %s", - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); -#endif /* ISC_PLATFORM_USETHREADS */ - - /* - * Clean up. - */ -#ifdef ISC_PLATFORM_USETHREADS - _close(manager->pipe_fds[0]); - _close(manager->pipe_fds[1]); - (void)isc_condition_destroy(&manager->shutdown_ok); -#endif /* ISC_PLATFORM_USETHREADS */ - - for (i = 0 ; i < FD_SETSIZE ; i++) - if (manager->fdstate[i] == CLOSE_PENDING) - closesocket(i); - - DESTROYLOCK(&manager->lock); - manager->magic = 0; - mctx= manager->mctx; - isc_mem_put(mctx, manager, sizeof(*manager)); - - isc_mem_detach(&mctx); - - *managerp = NULL; -} - -static isc_result_t -socket_recv(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task, - unsigned int flags) -{ - int io_state; - isc_boolean_t have_lock = ISC_FALSE; - isc_task_t *ntask = NULL; - isc_result_t result = ISC_R_SUCCESS; - - dev->ev_sender = task; - - if (sock->type == isc_sockettype_udp) { - io_state = doio_recv(sock, dev); - } else { - LOCK(&sock->lock); - have_lock = ISC_TRUE; - - if (ISC_LIST_EMPTY(sock->recv_list)) - io_state = doio_recv(sock, dev); - else - io_state = DOIO_SOFT; - } - - switch (io_state) { - case DOIO_SOFT: - /* - * We couldn't read all or part of the request right now, so - * queue it. - * - * Attach to socket and to task - */ - isc_task_attach(task, &ntask); - dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED; - - if (!have_lock) { - LOCK(&sock->lock); - have_lock = ISC_TRUE; - } - - /* - * Enqueue the request. If the socket was previously not being - * watched, poke the watcher to start paying attention to it. - */ - if (ISC_LIST_EMPTY(sock->recv_list)) - select_poke(sock->manager, sock->fd, SELECT_POKE_READ); - ISC_LIST_ENQUEUE(sock->recv_list, dev, ev_link); - - socket_log(sock, NULL, EVENT, NULL, 0, 0, - "socket_recv: event %p -> task %p", - dev, ntask); - - if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0) - result = ISC_R_INPROGRESS; - break; - - case DOIO_EOF: - dev->result = ISC_R_EOF; - /* fallthrough */ - - case DOIO_HARD: - case DOIO_SUCCESS: - if ((flags & ISC_SOCKFLAG_IMMEDIATE) == 0) - send_recvdone_event(sock, &dev); - break; - } - - if (have_lock) - UNLOCK(&sock->lock); - - return (result); -} - -isc_result_t -isc_socket_recvv(isc_socket_t *sock, isc_bufferlist_t *buflist, - unsigned int minimum, isc_task_t *task, - isc_taskaction_t action, const void *arg) -{ - isc_socketevent_t *dev; - isc_socketmgr_t *manager; - unsigned int iocount; - isc_buffer_t *buffer; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(buflist != NULL); - REQUIRE(!ISC_LIST_EMPTY(*buflist)); - REQUIRE(task != NULL); - REQUIRE(action != NULL); - - manager = sock->manager; - REQUIRE(VALID_MANAGER(manager)); - - iocount = isc_bufferlist_availablecount(buflist); - REQUIRE(iocount > 0); - - INSIST(sock->bound); - - dev = allocate_socketevent(sock, ISC_SOCKEVENT_RECVDONE, action, arg); - if (dev == NULL) { - return (ISC_R_NOMEMORY); - } - - /* - * UDP sockets are always partial read - */ - if (sock->type == isc_sockettype_udp) - dev->minimum = 1; - else { - if (minimum == 0) - dev->minimum = iocount; - else - dev->minimum = minimum; - } - - /* - * Move each buffer from the passed in list to our internal one. - */ - buffer = ISC_LIST_HEAD(*buflist); - while (buffer != NULL) { - ISC_LIST_DEQUEUE(*buflist, buffer, link); - ISC_LIST_ENQUEUE(dev->bufferlist, buffer, link); - buffer = ISC_LIST_HEAD(*buflist); - } - - return (socket_recv(sock, dev, task, 0)); -} - -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, const void *arg) -{ - isc_socketevent_t *dev; - isc_socketmgr_t *manager; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(action != NULL); - - manager = sock->manager; - REQUIRE(VALID_MANAGER(manager)); - - INSIST(sock->bound); - - dev = allocate_socketevent(sock, ISC_SOCKEVENT_RECVDONE, action, arg); - if (dev == NULL) - return (ISC_R_NOMEMORY); - - return (isc_socket_recv2(sock, region, minimum, task, dev, 0)); -} - -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) -{ - event->ev_sender = sock; - event->result = ISC_R_UNEXPECTED; - ISC_LIST_INIT(event->bufferlist); - 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; - } - - return (socket_recv(sock, event, task, flags)); -} - -static isc_result_t -socket_send(isc_socket_t *sock, isc_socketevent_t *dev, isc_task_t *task, - isc_sockaddr_t *address, struct in6_pktinfo *pktinfo, - unsigned int flags) -{ - int io_state; - isc_boolean_t have_lock = ISC_FALSE; - 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(sock, NULL, TRACE, isc_msgcat, ISC_MSGSET_SOCKET, - ISC_MSG_PKTINFOPROVIDED, - "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; - } - - if (sock->type == isc_sockettype_udp) - io_state = doio_send(sock, dev); - else { - LOCK(&sock->lock); - have_lock = ISC_TRUE; - - if (ISC_LIST_EMPTY(sock->send_list)) - io_state = doio_send(sock, dev); - else - io_state = DOIO_SOFT; - } - - switch (io_state) { - 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) { - isc_task_attach(task, &ntask); - dev->attributes |= ISC_SOCKEVENTATTR_ATTACHED; - - if (!have_lock) { - LOCK(&sock->lock); - have_lock = ISC_TRUE; - } - - /* - * Enqueue the request. If the socket was previously not being - * watched, poke the watcher to start paying attention to it. - */ - if (ISC_LIST_EMPTY(sock->send_list)) - select_poke(sock->manager, sock->fd, - SELECT_POKE_WRITE); - ISC_LIST_ENQUEUE(sock->send_list, dev, ev_link); - - socket_log(sock, NULL, EVENT, NULL, 0, 0, - "socket_send: event %p -> task %p", - dev, ntask); - - if ((flags & ISC_SOCKFLAG_IMMEDIATE) != 0) - result = ISC_R_INPROGRESS; - break; - } - - case DOIO_HARD: - case DOIO_SUCCESS: - if ((flags & ISC_SOCKFLAG_IMMEDIATE) == 0) - send_senddone_event(sock, &dev); - break; - } - - if (have_lock) - UNLOCK(&sock->lock); - - return (result); -} - -isc_result_t -isc_socket_send(isc_socket_t *sock, isc_region_t *region, - isc_task_t *task, isc_taskaction_t action, const 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, const void *arg, - isc_sockaddr_t *address, struct in6_pktinfo *pktinfo) -{ - isc_socketevent_t *dev; - isc_socketmgr_t *manager; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(region != NULL); - REQUIRE(task != NULL); - REQUIRE(action != NULL); - - manager = sock->manager; - REQUIRE(VALID_MANAGER(manager)); - - INSIST(sock->bound); - - dev = allocate_socketevent(sock, ISC_SOCKEVENT_SENDDONE, action, arg); - if (dev == NULL) { - return (ISC_R_NOMEMORY); - } - - dev->region = *region; - - return (socket_send(sock, dev, task, address, pktinfo, 0)); -} - -isc_result_t -isc_socket_sendv(isc_socket_t *sock, isc_bufferlist_t *buflist, - isc_task_t *task, isc_taskaction_t action, const void *arg) -{ - return (isc_socket_sendtov(sock, buflist, task, action, arg, NULL, - NULL)); -} - -isc_result_t -isc_socket_sendtov(isc_socket_t *sock, isc_bufferlist_t *buflist, - isc_task_t *task, isc_taskaction_t action, const void *arg, - isc_sockaddr_t *address, struct in6_pktinfo *pktinfo) -{ - isc_socketevent_t *dev; - isc_socketmgr_t *manager; - unsigned int iocount; - isc_buffer_t *buffer; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(buflist != NULL); - REQUIRE(!ISC_LIST_EMPTY(*buflist)); - REQUIRE(task != NULL); - REQUIRE(action != NULL); - - manager = sock->manager; - REQUIRE(VALID_MANAGER(manager)); - - iocount = isc_bufferlist_usedcount(buflist); - REQUIRE(iocount > 0); - - dev = allocate_socketevent(sock, ISC_SOCKEVENT_SENDDONE, action, arg); - if (dev == NULL) { - return (ISC_R_NOMEMORY); - } - - /* - * Move each buffer from the passed in list to our internal one. - */ - buffer = ISC_LIST_HEAD(*buflist); - while (buffer != NULL) { - ISC_LIST_DEQUEUE(*buflist, buffer, link); - ISC_LIST_ENQUEUE(dev->bufferlist, buffer, link); - buffer = ISC_LIST_HEAD(*buflist); - } - - return (socket_send(sock, dev, task, address, pktinfo, 0)); -} - -isc_result_t -isc_socket_sendto2(isc_socket_t *sock, isc_region_t *region, - isc_task_t *task, - isc_sockaddr_t *address, struct in6_pktinfo *pktinfo, - isc_socketevent_t *event, unsigned int flags) -{ - 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; - ISC_LIST_INIT(event->bufferlist); - event->region = *region; - event->n = 0; - event->offset = 0; - event->attributes = 0; - - return (socket_send(sock, event, task, address, pktinfo, flags)); -} - -isc_result_t -isc_socket_bind(isc_socket_t *sock, isc_sockaddr_t *sockaddr) { - int bind_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - int on = 1; - - LOCK(&sock->lock); - - INSIST(!sock->bound); - - if (sock->pf != sockaddr->type.sa.sa_family) { - UNLOCK(&sock->lock); - return (ISC_R_FAMILYMISMATCH); - } - if (setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, - sizeof(on)) < 0) { - UNEXPECTED_ERROR(__FILE__, __LINE__, - "setsockopt(%d) %s", sock->fd, - isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL, - ISC_MSG_FAILED, "failed")); - /* 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: - isc__strerror(bind_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, "bind: %s", - strbuf); - return (ISC_R_UNEXPECTED); - } - } - - socket_log(sock, sockaddr, TRACE, - isc_msgcat, ISC_MSGSET_SOCKET, ISC_MSG_BOUND, "bound"); - sock->bound = 1; - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); -} - -/* - * 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]; - - REQUIRE(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - - 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); - isc__strerror(WSAGetLastError(), strbuf, sizeof(strbuf)); - - UNEXPECTED_ERROR(__FILE__, __LINE__, "listen: %s", strbuf); - - return (ISC_R_UNEXPECTED); - } - - sock->listener = 1; - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); -} - -/* - * This should try to do agressive accept() XXXMLG - */ -isc_result_t -isc_socket_accept(isc_socket_t *sock, - isc_task_t *task, isc_taskaction_t action, const void *arg) -{ - isc_socket_newconnev_t *dev; - isc_socketmgr_t *manager; - isc_task_t *ntask = NULL; - isc_socket_t *nsock; - isc_result_t ret; - isc_boolean_t do_poke = ISC_FALSE; - - REQUIRE(VALID_SOCKET(sock)); - manager = sock->manager; - REQUIRE(VALID_MANAGER(manager)); - - LOCK(&sock->lock); - - 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. - */ - dev = (isc_socket_newconnev_t *) - isc_event_allocate(manager->mctx, task, ISC_SOCKEVENT_NEWCONN, - action, arg, sizeof (*dev)); - if (dev == NULL) { - UNLOCK(&sock->lock); - return (ISC_R_NOMEMORY); - } - ISC_LINK_INIT(dev, ev_link); - - ret = allocate_socket(manager, sock->type, &nsock); - if (ret != ISC_R_SUCCESS) { - isc_event_free((isc_event_t **)&dev); - UNLOCK(&sock->lock); - return (ret); - } - - /* - * Attach to socket and to task. - */ - isc_task_attach(task, &ntask); - nsock->references++; - - dev->ev_sender = ntask; - dev->newsocket = nsock; - - /* - * Poke watcher here. We still have the socket locked, so there - * is no race condition. We will keep the lock for such a short - * bit of time waking it up now or later won't matter all that much. - */ - if (ISC_LIST_EMPTY(sock->accept_list)) - do_poke = ISC_TRUE; - - ISC_LIST_ENQUEUE(sock->accept_list, dev, ev_link); - - if (do_poke) - select_poke(manager, sock->fd, SELECT_POKE_ACCEPT); - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); -} - -isc_result_t -isc_socket_connect(isc_socket_t *sock, isc_sockaddr_t *addr, - isc_task_t *task, isc_taskaction_t action, const void *arg) -{ - isc_socket_connev_t *dev; - isc_task_t *ntask = NULL; - isc_socketmgr_t *manager; - int cc; - int errval; - char strbuf[ISC_STRERRORSIZE]; - - 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); - - REQUIRE(!sock->connecting); - - dev = (isc_socket_connev_t *)isc_event_allocate(manager->mctx, sock, - ISC_SOCKEVENT_CONNECT, - action, arg, - sizeof (*dev)); - if (dev == NULL) { - UNLOCK(&sock->lock); - return (ISC_R_NOMEMORY); - } - ISC_LINK_INIT(dev, ev_link); - - /* - * Try to do the connect right away, as there can be only one - * outstanding, and it might happen to complete. - */ - sock->address = *addr; - cc = connect(sock->fd, &addr->type.sa, addr->length); - if (cc < 0) { - errval = WSAGetLastError(); - if (SOFT_ERROR(errval) || errval == WSAEINPROGRESS) - goto queue; - - switch (errval) { -#define ERROR_MATCH(a, b) case a: dev->result = b; goto err_exit; - 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_HOSTUNREACH); - ERROR_MATCH(WSAENETUNREACH, ISC_R_NETUNREACH); - ERROR_MATCH(WSAENOBUFS, ISC_R_NORESOURCES); - ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH); - ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED); - ERROR_MATCH(WSAECONNRESET, ISC_R_CONNECTIONRESET); -#undef ERROR_MATCH - } - - sock->connected = 0; - - isc__strerror(errval, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, "%d/%s", errval, strbuf); - - UNLOCK(&sock->lock); - isc_event_free((isc_event_t **)&dev); - return (ISC_R_UNEXPECTED); - - err_exit: - sock->connected = 0; - isc_task_send(task, (isc_event_t **)&dev); - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); - } - - /* - * If connect completed, fire off the done event. - */ - if (cc == 0) { - sock->connected = 1; - sock->bound = 1; - dev->result = ISC_R_SUCCESS; - isc_task_send(task, (isc_event_t **)&dev); - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); - } - - queue: - - /* - * Attach to task. - */ - isc_task_attach(task, &ntask); - - sock->connecting = 1; - - dev->ev_sender = ntask; - - /* - * Poke watcher here. We still have the socket locked, so there - * is no race condition. We will keep the lock for such a short - * bit of time waking it up now or later won't matter all that much. - */ - if (sock->connect_ev == NULL) - select_poke(manager, sock->fd, SELECT_POKE_CONNECT); - - sock->connect_ev = dev; - - UNLOCK(&sock->lock); - return (ISC_R_SUCCESS); -} - -/* - * Called when a socket with a pending connect() finishes. - */ -static void -internal_connect(isc_task_t *me, isc_event_t *ev) { - isc_socket_t *sock; - isc_socket_connev_t *dev; - isc_task_t *task; - int cc; - ISC_SOCKADDR_LEN_T optlen; - int connect_errno = 0; - char strbuf[ISC_STRERRORSIZE]; - - UNUSED(me); - INSIST(ev->ev_type == ISC_SOCKEVENT_INTW); - - sock = ev->ev_sender; - INSIST(VALID_SOCKET(sock)); - - LOCK(&sock->lock); - - /* - * When the internal event was sent the reference count was bumped - * to keep the socket around for us. Decrement the count here. - */ - INSIST(sock->references > 0); - sock->references--; - if (sock->references == 0) { - UNLOCK(&sock->lock); - destroy(&sock); - return; - } - - /* - * Has this event been canceled? - */ - dev = sock->connect_ev; - if (dev == NULL) { - INSIST(!sock->connecting); - UNLOCK(&sock->lock); - return; - } - - INSIST(sock->connecting); - sock->connecting = 0; - - /* - * Get any possible error status here. - */ - optlen = sizeof(cc); - if (getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, - (void *)&cc, (void *)&optlen) < 0) - connect_errno = WSAGetLastError(); - - if (connect_errno != 0) { - /* - * If the error is WSAEAGAIN, just re-select on this - * fd and pretend nothing strange happened. - */ - if (SOFT_ERROR(connect_errno) || connect_errno == WSAEINPROGRESS) { - sock->connecting = 1; - select_poke(sock->manager, sock->fd, - SELECT_POKE_CONNECT); - UNLOCK(&sock->lock); - - return; - } - - /* - * Translate other errors into ISC_R_* flavors. - */ - switch (connect_errno) { -#define ERROR_MATCH(a, b) case a: dev->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_HOSTUNREACH); - ERROR_MATCH(WSAENETUNREACH, ISC_R_NETUNREACH); - ERROR_MATCH(WSAENOBUFS, ISC_R_NORESOURCES); - ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH); - ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED); - ERROR_MATCH(WSAETIMEDOUT, ISC_R_TIMEDOUT); - ERROR_MATCH(WSAECONNRESET, ISC_R_CONNECTIONRESET); -#undef ERROR_MATCH - default: - dev->result = ISC_R_UNEXPECTED; - isc__strerror(connect_errno, strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, - "internal_connect: connect() %s", - strbuf); - } - } else { - dev->result = ISC_R_SUCCESS; - sock->connected = 1; - sock->bound = 1; - } - - sock->connect_ev = NULL; - - UNLOCK(&sock->lock); - - task = dev->ev_sender; - dev->ev_sender = sock; - isc_task_sendanddetach(&task, (isc_event_t **)&dev); -} - -isc_result_t -isc_socket_getpeername(isc_socket_t *sock, isc_sockaddr_t *addressp) { - isc_result_t ret; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(addressp != NULL); - - LOCK(&sock->lock); - - if (sock->connected) { - *addressp = sock->address; - ret = ISC_R_SUCCESS; - } else { - ret = ISC_R_NOTCONNECTED; - } - - UNLOCK(&sock->lock); - - return (ret); -} - -isc_result_t -isc_socket_getsockname(isc_socket_t *sock, isc_sockaddr_t *addressp) { - ISC_SOCKADDR_LEN_T len; - isc_result_t ret; - char strbuf[ISC_STRERRORSIZE]; - - REQUIRE(VALID_SOCKET(sock)); - REQUIRE(addressp != NULL); - - LOCK(&sock->lock); - - if (!sock->bound) { - ret = ISC_R_NOTBOUND; - goto out; - } - - ret = ISC_R_SUCCESS; - - len = sizeof(addressp->type); - if (getsockname(sock->fd, &addressp->type.sa, (void *)&len) < 0) { - isc__strerror(WSAGetLastError(), strbuf, sizeof(strbuf)); - UNEXPECTED_ERROR(__FILE__, __LINE__, "getsockname: %s", - strbuf); - ret = ISC_R_UNEXPECTED; - goto out; - } - addressp->length = (unsigned int)len; - - out: - UNLOCK(&sock->lock); - - return (ret); -} - -/* - * 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); - - /* - * 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) == ISC_SOCKCANCEL_RECV) - && !ISC_LIST_EMPTY(sock->recv_list)) { - 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; - } - } - - if (((how & ISC_SOCKCANCEL_SEND) == ISC_SOCKCANCEL_SEND) - && !ISC_LIST_EMPTY(sock->send_list)) { - 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; - } - } - - if (((how & ISC_SOCKCANCEL_ACCEPT) == ISC_SOCKCANCEL_ACCEPT) - && !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_LIST_UNLINK(sock->accept_list, dev, - ev_link); - - dev->newsocket->references--; - free_socket(&dev->newsocket); - - dev->result = ISC_R_CANCELED; - dev->ev_sender = sock; - isc_task_sendanddetach(¤t_task, - (isc_event_t **)&dev); - } - - dev = next; - } - } - - /* - * Connecting is not a list. - */ - if (((how & ISC_SOCKCANCEL_CONNECT) == ISC_SOCKCANCEL_CONNECT) - && sock->connect_ev != NULL) { - isc_socket_connev_t *dev; - isc_task_t *current_task; - - INSIST(sock->connecting); - sock->connecting = 0; - - dev = sock->connect_ev; - current_task = dev->ev_sender; - - if ((task == NULL) || (task == current_task)) { - sock->connect_ev = NULL; - - dev->result = ISC_R_CANCELED; - dev->ev_sender = sock; - isc_task_sendanddetach(¤t_task, - (isc_event_t **)&dev); - } - } - - UNLOCK(&sock->lock); -} - -isc_sockettype_t -isc_socket_gettype(isc_socket_t *sock) { - REQUIRE(VALID_SOCKET(sock)); - - return (sock->type); -} - -isc_boolean_t -isc_socket_isbound(isc_socket_t *sock) { - isc_boolean_t val; - - LOCK(&sock->lock); - val = ((sock->bound) ? ISC_TRUE : ISC_FALSE); - UNLOCK(&sock->lock); - - return (val); -} |