From ba8f85b49c38af7bc2a9acdef5dcde2de008d25e Mon Sep 17 00:00:00 2001
From: peter <peter@FreeBSD.org>
Date: Sat, 12 Jul 2008 05:00:28 +0000
Subject: Flatten bind9 vendor work area
---
contrib/bind9/lib/isc/unix/socket.c | 3836 -----------------------------------
1 file changed, 3836 deletions(-)
delete mode 100644 contrib/bind9/lib/isc/unix/socket.c
(limited to 'contrib/bind9/lib/isc/unix/socket.c')
diff --git a/contrib/bind9/lib/isc/unix/socket.c b/contrib/bind9/lib/isc/unix/socket.c
deleted file mode 100644
index e0b9021..0000000
--- a/contrib/bind9/lib/isc/unix/socket.c
+++ /dev/null
@@ -1,3836 +0,0 @@
-/*
- * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1998-2003 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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.
- */
-
-/* $Id: socket.c,v 1.237.18.29 2007/08/28 07:20:06 tbox Exp $ */
-
-/*! \file */
-
-#include <config.h>
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#ifdef ISC_PLATFORM_HAVESYSUNH
-#include <sys/un.h>
-#endif
-#include <sys/time.h>
-#include <sys/uio.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <isc/buffer.h>
-#include <isc/bufferlist.h>
-#include <isc/condition.h>
-#include <isc/formatcheck.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/once.h>
-#include <isc/platform.h>
-#include <isc/print.h>
-#include <isc/region.h>
-#include <isc/socket.h>
-#include <isc/strerror.h>
-#include <isc/task.h>
-#include <isc/thread.h>
-#include <isc/util.h>
-
-#include "errno2result.h"
-
-#ifndef ISC_PLATFORM_USETHREADS
-#include "socket_p.h"
-#endif /* ISC_PLATFORM_USETHREADS */
-
-/*%
- * 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
-
-
-#if defined(SO_BSDCOMPAT) && defined(__linux__)
-#include <sys/utsname.h>
-#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) == EAGAIN || \
- (e) == EWOULDBLOCK || \
- (e) == EINTR || \
- (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_HAVEIN6PKTINFO
-#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
-
-/*%
- * The size to raise the recieve buffer to (from BIND 8).
- */
-#define RCVBUFSIZE (32*1024)
-
-/*%
- * 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
-
- char *recvcmsgbuf;
- ISC_SOCKADDR_LEN_T recvcmsgbuflen;
- char *sendcmsgbuf;
- ISC_SOCKADDR_LEN_T sendcmsgbuflen;
-};
-
-#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;
- isc_socket_t *fds[FD_SETSIZE];
- int fdstate[FD_SETSIZE];
- int maxfd;
-#ifdef ISC_PLATFORM_USETHREADS
- isc_thread_t watcher;
- isc_condition_t shutdown_ok;
- int pipe_fds[2];
-#else /* ISC_PLATFORM_USETHREADS */
- unsigned int refs;
-#endif /* ISC_PLATFORM_USETHREADS */
-};
-
-#ifndef ISC_PLATFORM_USETHREADS
-static isc_socketmgr_t *socketmgr = NULL;
-#endif /* ISC_PLATFORM_USETHREADS */
-
-#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 *, struct iovec *, size_t *);
-static void build_msghdr_recv(isc_socket_t *, isc_socketevent_t *,
- struct msghdr *, struct iovec *, 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 (-4) /*%< Same as _WRITE */
-#define SELECT_POKE_CLOSE (-5)
-
-#define SOCK_DEAD(s) ((s)->references == 0)
-
-static void
-manager_log(isc_socketmgr_t *sockmgr,
- isc_logcategory_t *category, isc_logmodule_t *module, int level,
- const char *fmt, ...) ISC_FORMAT_PRINTF(5, 6);
-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[ISC_SOCKADDR_FORMATSIZE];
- 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 < (int)FD_SETSIZE);
-
- if (manager->fdstate[fd] == CLOSE_PENDING) {
- manager->fdstate[fd] = CLOSED;
- FD_CLR(fd, &manager->read_fds);
- FD_CLR(fd, &manager->write_fds);
- (void)close(fd);
- return;
- }
- if (manager->fdstate[fd] != MANAGED)
- return;
-
- sock = manager->fds[fd];
-
- /*
- * Set requested bit.
- */
- if (msg == SELECT_POKE_READ)
- FD_SET(sock->fd, &manager->read_fds);
- if (msg == SELECT_POKE_WRITE)
- FD_SET(sock->fd, &manager->write_fds);
-}
-
-#ifdef ISC_PLATFORM_USETHREADS
-/*
- * 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;
-
- do {
- cc = write(mgr->pipe_fds[1], buf, sizeof(buf));
-#ifdef ENOSR
- /*
- * Treat ENOSR as EAGAIN but loop slowly as it is
- * unlikely to clear fast.
- */
- if (cc < 0 && errno == ENOSR) {
- sleep(1);
- errno = EAGAIN;
- }
-#endif
- } 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));
-}
-
-/*
- * 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;
- *fd = -1; /* Silence compiler. */
- 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];
-}
-#else /* ISC_PLATFORM_USETHREADS */
-/*
- * Update the state of the socketmgr when something changes.
- */
-static void
-select_poke(isc_socketmgr_t *manager, int fd, int msg) {
- if (msg == SELECT_POKE_SHUTDOWN)
- return;
- else if (fd >= 0)
- wakeup_socket(manager, fd, msg);
- return;
-}
-#endif /* ISC_PLATFORM_USETHREADS */
-
-/*
- * Make a fd non-blocking.
- */
-static isc_result_t
-make_nonblock(int fd) {
- int ret;
- int flags;
- char strbuf[ISC_STRERRORSIZE];
-#ifdef USE_FIONBIO_IOCTL
- int on = 1;
-
- ret = ioctl(fd, FIONBIO, (char *)&on);
-#else
- flags = fcntl(fd, F_GETFL, 0);
- flags |= PORT_NONBLOCK;
- ret = fcntl(fd, F_SETFL, flags);
-#endif
-
- if (ret == -1) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__,
-#ifdef USE_FIONBIO_IOCTL
- "ioctl(%d, FIONBIO, &on): %s", fd,
-#else
- "fcntl(%d, F_SETFL, %d): %s", fd, flags,
-#endif
- strbuf);
-
- return (ISC_R_UNEXPECTED);
- }
-
- return (ISC_R_SUCCESS);
-}
-
-#ifdef USE_CMSG
-/*
- * Not all OSes support advanced CMSG macros: CMSG_LEN and CMSG_SPACE.
- * In order to ensure as much portability as possible, we provide wrapper
- * functions of these macros.
- * Note that cmsg_space() could run slow on OSes that do not have
- * CMSG_SPACE.
- */
-static inline ISC_SOCKADDR_LEN_T
-cmsg_len(ISC_SOCKADDR_LEN_T len) {
-#ifdef CMSG_LEN
- return (CMSG_LEN(len));
-#else
- ISC_SOCKADDR_LEN_T hdrlen;
-
- /*
- * Cast NULL so that any pointer arithmetic performed by CMSG_DATA
- * is correct.
- */
- hdrlen = (ISC_SOCKADDR_LEN_T)CMSG_DATA(((struct cmsghdr *)NULL));
- return (hdrlen + len);
-#endif
-}
-
-static inline ISC_SOCKADDR_LEN_T
-cmsg_space(ISC_SOCKADDR_LEN_T len) {
-#ifdef CMSG_SPACE
- return (CMSG_SPACE(len));
-#else
- struct msghdr msg;
- struct cmsghdr *cmsgp;
- /*
- * XXX: The buffer length is an ad-hoc value, but should be enough
- * in a practical sense.
- */
- char dummybuf[sizeof(struct cmsghdr) + 1024];
-
- memset(&msg, 0, sizeof(msg));
- msg.msg_control = dummybuf;
- msg.msg_controllen = sizeof(dummybuf);
-
- cmsgp = (struct cmsghdr *)dummybuf;
- cmsgp->cmsg_len = cmsg_len(len);
-
- cmsgp = CMSG_NXTHDR(&msg, cmsgp);
- if (cmsgp != NULL)
- return ((char *)cmsgp - (char *)msg.msg_control);
- else
- return (0);
-#endif
-}
-#endif /* USE_CMSG */
-
-/*
- * 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_HAVEIN6PKTINFO
- 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);
-
-#ifdef 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 == 0U || msg->msg_control == NULL)
- return;
-
-#ifdef SO_TIMESTAMP
- timevalp = NULL;
-#endif
-#ifdef ISC_PLATFORM_HAVEIN6PKTINFO
- 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_HAVEIN6PKTINFO
- 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, struct iovec *iov, size_t *write_countp)
-{
- unsigned int iovcount;
- isc_buffer_t *buffer;
- isc_region_t used;
- size_t write_count;
- size_t skip_count;
-
- 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].iov_base = (void *)(dev->region.base + dev->n);
- iov[0].iov_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].iov_base = (void *)(used.base
- + skip_count);
- iov[iovcount].iov_len = used.length - skip_count;
- write_count += (used.length - skip_count);
- skip_count = 0;
- iovcount++;
- }
- buffer = ISC_LIST_NEXT(buffer, link);
- }
-
- INSIST(skip_count == 0U);
-
- 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_HAVEIN6PKTINFO)
- 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));
- INSIST(msg->msg_controllen <= sock->sendcmsgbuflen);
- msg->msg_control = (void *)sock->sendcmsgbuf;
-
- cmsgp = (struct cmsghdr *)sock->sendcmsgbuf;
- 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 */
-#else /* ISC_NET_BSD44MSGHDR */
- msg->msg_accrights = NULL;
- msg->msg_accrightslen = 0;
-#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 avialable 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, struct iovec *iov, size_t *read_countp)
-{
- unsigned int iovcount;
- isc_buffer_t *buffer;
- isc_region_t available;
- size_t read_count;
-
- memset(msg, 0, sizeof(struct msghdr));
-
- if (sock->type == isc_sockettype_udp) {
- memset(&dev->address, 0, sizeof(dev->address));
-#ifdef BROKEN_RECVMSG
- if (sock->pf == AF_INET) {
- msg->msg_name = (void *)&dev->address.type.sin;
- msg->msg_namelen = sizeof(dev->address.type.sin6);
- } else if (sock->pf == AF_INET6) {
- msg->msg_name = (void *)&dev->address.type.sin6;
- msg->msg_namelen = sizeof(dev->address.type.sin6);
-#ifdef ISC_PLATFORM_HAVESYSUNH
- } else if (sock->pf == AF_UNIX) {
- msg->msg_name = (void *)&dev->address.type.sunix;
- msg->msg_namelen = sizeof(dev->address.type.sunix);
-#endif
- } else {
- msg->msg_name = (void *)&dev->address.type.sa;
- msg->msg_namelen = sizeof(dev->address.type);
- }
-#else
- msg->msg_name = (void *)&dev->address.type.sa;
- msg->msg_namelen = sizeof(dev->address.type);
-#endif
-#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].iov_base = (void *)(dev->region.base + dev->n);
- iov[0].iov_len = read_count;
- iovcount = 1;
-
- goto config;
- }
-
- /*
- * 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].iov_base = (void *)(available.base);
- iov[iovcount].iov_len = available.length;
- read_count += available.length;
- iovcount++;
- }
- buffer = ISC_LIST_NEXT(buffer, link);
- }
-
- config:
-
- /*
- * 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 = sock->recvcmsgbuf;
- msg->msg_controllen = sock->recvcmsgbuflen;
- }
-#endif /* USE_CMSG */
-#else /* ISC_NET_BSD44MSGHDR */
- msg->msg_accrights = NULL;
- msg->msg_accrightslen = 0;
-#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 void
-destroy_socketevent(isc_event_t *event) {
- isc_socketevent_t *ev = (isc_socketevent_t *)event;
-
- INSIST(ISC_LIST_EMPTY(ev->bufferlist));
-
- (ev->destroy)(event);
-}
-
-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;
- ev->destroy = ev->ev_destroy;
- ev->ev_destroy = destroy_socketevent;
-
- return (ev);
-}
-
-#if defined(ISC_SOCKET_DEBUG)
-static void
-dump_msg(struct msghdr *msg) {
- unsigned int i;
-
- printf("MSGHDR %p\n", msg);
- 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].iov_base,
- msg->msg_iov[i].iov_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;
- struct iovec iov[MAXSCATTERGATHER_RECV];
- size_t read_count;
- size_t actual_count;
- struct msghdr msghdr;
- isc_buffer_t *buffer;
- int recv_errno;
- char strbuf[ISC_STRERRORSIZE];
-
- build_msghdr_recv(sock, dev, &msghdr, iov, &read_count);
-
-#if defined(ISC_SOCKET_DEBUG)
- dump_msg(&msghdr);
-#endif
-
- cc = recvmsg(sock->fd, &msghdr, 0);
- recv_errno = errno;
-
-#if defined(ISC_SOCKET_DEBUG)
- dump_msg(&msghdr);
-#endif
-
- 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(ECONNREFUSED, ISC_R_CONNREFUSED);
- SOFT_OR_HARD(ENETUNREACH, ISC_R_NETUNREACH);
- SOFT_OR_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
- SOFT_OR_HARD(EHOSTDOWN, ISC_R_HOSTDOWN);
- /* HPUX 11.11 can return EADDRNOTAVAIL. */
- SOFT_OR_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
- ALWAYS_HARD(ENOBUFS, 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 > 0U) {
- 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 == 0U);
- }
- }
-
- /*
- * 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;
- struct iovec iov[MAXSCATTERGATHER_SEND];
- size_t write_count;
- struct msghdr msghdr;
- char addrbuf[ISC_SOCKADDR_FORMATSIZE];
- int attempts = 0;
- int send_errno;
- char strbuf[ISC_STRERRORSIZE];
-
- build_msghdr_send(sock, dev, &msghdr, iov, &write_count);
-
- resend:
- cc = sendmsg(sock->fd, &msghdr, 0);
- send_errno = errno;
-
- /*
- * Check for error or block condition.
- */
- if (cc < 0) {
- if (send_errno == EINTR && ++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(ECONNREFUSED, ISC_R_CONNREFUSED);
- ALWAYS_HARD(EACCES, ISC_R_NOPERM);
- ALWAYS_HARD(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
- ALWAYS_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
- ALWAYS_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
-#ifdef EHOSTDOWN
- ALWAYS_HARD(EHOSTDOWN, ISC_R_HOSTUNREACH);
-#endif
- ALWAYS_HARD(ENETUNREACH, ISC_R_NETUNREACH);
- ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);
- ALWAYS_HARD(EPERM, ISC_R_HOSTUNREACH);
- ALWAYS_HARD(EPIPE, ISC_R_NOTCONNECTED);
- ALWAYS_HARD(ECONNRESET, ISC_R_CONNECTIONRESET);
-
-#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 < (int)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 result;
- ISC_SOCKADDR_LEN_T cmsgbuflen;
-
- sock = isc_mem_get(manager->mctx, sizeof(*sock));
-
- if (sock == NULL)
- return (ISC_R_NOMEMORY);
-
- result = ISC_R_UNEXPECTED;
-
- sock->magic = 0;
- sock->references = 0;
-
- sock->manager = manager;
- sock->type = type;
- sock->fd = -1;
-
- ISC_LINK_INIT(sock, link);
-
- sock->recvcmsgbuf = NULL;
- sock->sendcmsgbuf = NULL;
-
- /*
- * set up cmsg buffers
- */
- cmsgbuflen = 0;
-#if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIN6PKTINFO)
- cmsgbuflen = cmsg_space(sizeof(struct in6_pktinfo));
-#endif
-#if defined(USE_CMSG) && defined(SO_TIMESTAMP)
- cmsgbuflen += cmsg_space(sizeof(struct timeval));
-#endif
- sock->recvcmsgbuflen = cmsgbuflen;
- if (sock->recvcmsgbuflen != 0U) {
- sock->recvcmsgbuf = isc_mem_get(manager->mctx, cmsgbuflen);
- if (sock->recvcmsgbuf == NULL)
- goto error;
- }
-
- cmsgbuflen = 0;
-#if defined(USE_CMSG) && defined(ISC_PLATFORM_HAVEIN6PKTINFO)
- cmsgbuflen = cmsg_space(sizeof(struct in6_pktinfo));
-#endif
- sock->sendcmsgbuflen = cmsgbuflen;
- if (sock->sendcmsgbuflen != 0U) {
- sock->sendcmsgbuf = isc_mem_get(manager->mctx, cmsgbuflen);
- if (sock->sendcmsgbuf == NULL)
- goto error;
- }
-
- /*
- * 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
- */
- result = isc_mutex_init(&sock->lock);
- if (result != ISC_R_SUCCESS) {
- sock->magic = 0;
- 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:
- if (sock->recvcmsgbuf != NULL)
- isc_mem_put(manager->mctx, sock->recvcmsgbuf,
- sock->recvcmsgbuflen);
- if (sock->sendcmsgbuf != NULL)
- isc_mem_put(manager->mctx, sock->sendcmsgbuf,
- sock->sendcmsgbuflen);
- isc_mem_put(manager->mctx, sock, sizeof(*sock));
-
- return (result);
-}
-
-/*
- * 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));
-
- if (sock->recvcmsgbuf != NULL)
- isc_mem_put(sock->manager->mctx, sock->recvcmsgbuf,
- sock->recvcmsgbuflen);
- if (sock->sendcmsgbuf != NULL)
- isc_mem_put(sock->manager->mctx, sock->sendcmsgbuf,
- sock->sendcmsgbuflen);
-
- sock->magic = 0;
-
- DESTROYLOCK(&sock->lock);
-
- isc_mem_put(sock->manager->mctx, sock, sizeof(*sock));
-
- *socketp = NULL;
-}
-
-#ifdef SO_BSDCOMPAT
-/*
- * This really should not be necessary to do. Having to workout
- * which kernel version we are on at run time so that we don't cause
- * the kernel to issue a warning about us using a deprecated socket option.
- * Such warnings should *never* be on by default in production kernels.
- *
- * We can't do this a build time because executables are moved between
- * machines and hence kernels.
- *
- * We can't just not set SO_BSDCOMAT because some kernels require it.
- */
-
-static isc_once_t bsdcompat_once = ISC_ONCE_INIT;
-isc_boolean_t bsdcompat = ISC_TRUE;
-
-static void
-clear_bsdcompat(void) {
-#ifdef __linux__
- struct utsname buf;
- char *endp;
- long int major;
- long int minor;
-
- uname(&buf); /* Can only fail if buf is bad in Linux. */
-
- /* Paranoia in parsing can be increased, but we trust uname(). */
- major = strtol(buf.release, &endp, 10);
- if (*endp == '.') {
- minor = strtol(endp+1, &endp, 10);
- if ((major > 2) || ((major == 2) && (minor >= 4))) {
- bsdcompat = ISC_FALSE;
- }
- }
-#endif /* __linux __ */
-}
-#endif
-
-/*%
- * 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 result;
-#if defined(USE_CMSG) || defined(SO_BSDCOMPAT)
- int on = 1;
-#endif
-#if defined(SO_RCVBUF)
- ISC_SOCKADDR_LEN_T optlen;
- int size;
-#endif
- char strbuf[ISC_STRERRORSIZE];
- const char *err = "socket";
- int try = 0;
-
- REQUIRE(VALID_MANAGER(manager));
- REQUIRE(socketp != NULL && *socketp == NULL);
-
- result = allocate_socket(manager, type, &sock);
- if (result != ISC_R_SUCCESS)
- return (result);
-
- sock->pf = pf;
- again:
- 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;
- case isc_sockettype_unix:
- sock->fd = socket(pf, SOCK_STREAM, 0);
- break;
- }
- if (sock->fd == -1 && errno == EINTR && try++ < 42)
- goto again;
-
-#ifdef F_DUPFD
- /*
- * Leave a space for stdio to work in.
- */
- if (sock->fd >= 0 && sock->fd < 20) {
- int new, tmp;
- new = fcntl(sock->fd, F_DUPFD, 20);
- tmp = errno;
- (void)close(sock->fd);
- errno = tmp;
- sock->fd = new;
- err = "isc_socket_create: fcntl";
- }
-#endif
-
- if (sock->fd >= (int)FD_SETSIZE) {
- (void)close(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) {
- free_socket(&sock);
-
- switch (errno) {
- case EMFILE:
- case ENFILE:
- case ENOBUFS:
- return (ISC_R_NORESOURCES);
-
- case EPROTONOSUPPORT:
- case EPFNOSUPPORT:
- case EAFNOSUPPORT:
- /*
- * Linux 2.2 (and maybe others) return EINVAL instead of
- * EAFNOSUPPORT.
- */
- case EINVAL:
- return (ISC_R_FAMILYNOSUPPORT);
-
- default:
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "%s() %s: %s", err,
- 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) {
- (void)close(sock->fd);
- free_socket(&sock);
- return (ISC_R_UNEXPECTED);
- }
-
-#ifdef SO_BSDCOMPAT
- RUNTIME_CHECK(isc_once_do(&bsdcompat_once,
- clear_bsdcompat) == ISC_R_SUCCESS);
- if (type != isc_sockettype_unix && bsdcompat &&
- setsockopt(sock->fd, SOL_SOCKET, SO_BSDCOMPAT,
- (void *)&on, sizeof(on)) < 0) {
- isc__strerror(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) || defined(SO_RCVBUF)
- if (type == isc_sockettype_udp) {
-
-#if defined(USE_CMSG)
-#if defined(SO_TIMESTAMP)
- if (setsockopt(sock->fd, SOL_SOCKET, SO_TIMESTAMP,
- (void *)&on, sizeof(on)) < 0
- && errno != ENOPROTOOPT) {
- isc__strerror(errno, 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)
- if (pf == AF_INET6 && sock->recvcmsgbuflen == 0U) {
- /*
- * Warn explicitly because this anomaly can be hidden
- * in usual operation (and unexpectedly appear later).
- */
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "No buffer available to receive "
- "IPv6 destination");
- }
-#ifdef ISC_PLATFORM_HAVEIN6PKTINFO
-#ifdef IPV6_RECVPKTINFO
- /* RFC 3542 */
- if ((pf == AF_INET6)
- && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO,
- (void *)&on, sizeof(on)) < 0)) {
- isc__strerror(errno, 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
- /* RFC 2292 */
- if ((pf == AF_INET6)
- && (setsockopt(sock->fd, IPPROTO_IPV6, IPV6_PKTINFO,
- (void *)&on, sizeof(on)) < 0)) {
- isc__strerror(errno, 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 */
-#endif /* ISC_PLATFORM_HAVEIN6PKTINFO */
-#ifdef IPV6_USE_MIN_MTU /* RFC 3542, 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 /* defined(USE_CMSG) */
-
-#if defined(SO_RCVBUF)
- optlen = sizeof(size);
- if (getsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF,
- (void *)&size, &optlen) >= 0 &&
- size < RCVBUFSIZE) {
- size = RCVBUFSIZE;
- if (setsockopt(sock->fd, SOL_SOCKET, SO_RCVBUF,
- (void *)&size, sizeof(size)) == -1) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "setsockopt(%d, SO_RCVBUF, %d) %s: %s",
- sock->fd, size,
- isc_msgcat_get(isc_msgcat,
- ISC_MSGSET_GENERAL,
- ISC_MSG_FAILED,
- "failed"),
- strbuf);
- }
- }
-#endif
- }
-#endif /* defined(USE_CMSG) || defined(SO_RCVBUF) */
-
- 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;
-
- UNLOCK(&manager->lock);
-
- socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
- ISC_MSG_CREATED, "created");
-
- 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;
- char strbuf[ISC_STRERRORSIZE];
- const char *err = "accept";
-
- 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. Also ignore ECONNRESET, which has been reported to
- * be spuriously returned on Linux 2.2.19 although it is not
- * a documented error for accept(). ECONNABORTED has been
- * reported for Solaris 8. The rest are thrown in not because
- * we have seen them but because they are ignored by other
- * deamons such as BIND 8 and Apache.
- */
-
- 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);
-
-#ifdef F_DUPFD
- /*
- * Leave a space for stdio to work in.
- */
- if (fd >= 0 && fd < 20) {
- int new, tmp;
- new = fcntl(fd, F_DUPFD, 20);
- tmp = errno;
- (void)close(fd);
- errno = tmp;
- fd = new;
- err = "fcntl";
- }
-#endif
-
- if (fd < 0) {
- if (SOFT_ERROR(errno))
- goto soft_error;
- switch (errno) {
- case ENOBUFS:
- case ENFILE:
- case ENOMEM:
- case ECONNRESET:
- case ECONNABORTED:
- case EHOSTUNREACH:
- case EHOSTDOWN:
- case ENETUNREACH:
- case ENETDOWN:
- case ECONNREFUSED:
-#ifdef EPROTO
- case EPROTO:
-#endif
-#ifdef ENONET
- case ENONET:
-#endif
- goto soft_error;
- default:
- break;
- }
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "internal_accept: %s() %s: %s", err,
- isc_msgcat_get(isc_msgcat,
- ISC_MSGSET_GENERAL,
- ISC_MSG_FAILED,
- "failed"),
- strbuf);
- fd = -1;
- result = ISC_R_UNEXPECTED;
- } else {
- if (addrlen == 0U) {
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "internal_accept(): "
- "accept() failed to return "
- "remote address");
-
- (void)close(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)close(fd);
- goto soft_error;
- } else if (fd >= (int)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)close(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)) {
- (void)close(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;
-
- 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_PTR(&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,
- fd_set *readfds, fd_set *writefds)
-{
- int i;
- isc_socket_t *sock;
- isc_boolean_t unlock_sock;
-
- REQUIRE(maxfd <= (int)FD_SETSIZE);
-
- /*
- * Process read/writes on other fds here. Avoid locking
- * and unlocking twice if both reads and writes are possible.
- */
- for (i = 0; i < maxfd; i++) {
-#ifdef ISC_PLATFORM_USETHREADS
- if (i == manager->pipe_fds[0] || i == manager->pipe_fds[1])
- continue;
-#endif /* ISC_PLATFORM_USETHREADS */
-
- if (manager->fdstate[i] == CLOSE_PENDING) {
- manager->fdstate[i] = CLOSED;
- FD_CLR(i, &manager->read_fds);
- FD_CLR(i, &manager->write_fds);
-
- (void)close(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);
- else
- dispatch_send(sock);
- }
- FD_CLR(i, &manager->write_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
-watcher(void *uap) {
- isc_socketmgr_t *manager = uap;
- isc_boolean_t done;
- int ctlfd;
- int cc;
- fd_set readfds;
- fd_set writefds;
- int msg, fd;
- int maxfd;
- char strbuf[ISC_STRERRORSIZE];
-
- /*
- * 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;
- maxfd = manager->maxfd + 1;
-
- UNLOCK(&manager->lock);
-
- cc = select(maxfd, &readfds, &writefds, NULL, NULL);
- if (cc < 0) {
- if (!SOFT_ERROR(errno)) {
- isc__strerror(errno, strbuf,
- sizeof(strbuf));
- FATAL_ERROR(__FILE__, __LINE__,
- "select() %s: %s",
- isc_msgcat_get(isc_msgcat,
- ISC_MSGSET_GENERAL,
- ISC_MSG_FAILED,
- "failed"),
- strbuf);
- }
- }
-
- LOCK(&manager->lock);
- } while (cc < 0);
-
-
- /*
- * Process reads on internal, control fd.
- */
- if (FD_ISSET(ctlfd, &readfds)) {
- for (;;) {
- select_readmsg(manager, &fd, &msg);
-
- 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;
- }
-
- /*
- * This is a wakeup on a socket. Look
- * at the event queue for both read and write,
- * and decide if we need to watch on it now
- * or not.
- */
- wakeup_socket(manager, fd, msg);
- }
- }
-
- process_fds(manager, maxfd, &readfds, &writefds);
- }
-
- 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
- isc_result_t result;
-
- 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);
- result = isc_mutex_init(&manager->lock);
- if (result != ISC_R_SUCCESS) {
- isc_mem_put(mctx, manager, sizeof(*manager));
- return (result);
- }
-#ifdef ISC_PLATFORM_USETHREADS
- 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 (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);
- }
-
- RUNTIME_CHECK(make_nonblock(manager->pipe_fds[0]) == ISC_R_SUCCESS);
-#if 0
- RUNTIME_CHECK(make_nonblock(manager->pipe_fds[1]) == ISC_R_SUCCESS);
-#endif
-#else /* ISC_PLATFORM_USETHREADS */
- manager->refs = 1;
-#endif /* ISC_PLATFORM_USETHREADS */
-
- /*
- * Set up initial state for the select loop
- */
- FD_ZERO(&manager->read_fds);
- FD_ZERO(&manager->write_fds);
-#ifdef ISC_PLATFORM_USETHREADS
- FD_SET(manager->pipe_fds[0], &manager->read_fds);
- manager->maxfd = manager->pipe_fds[0];
-#else /* ISC_PLATFORM_USETHREADS */
- manager->maxfd = 0;
-#endif /* ISC_PLATFORM_USETHREADS */
- memset(manager->fdstate, 0, sizeof(manager->fdstate));
-
-#ifdef ISC_PLATFORM_USETHREADS
- /*
- * Start up the select/poll thread.
- */
- if (isc_thread_create(watcher, manager, &manager->watcher) !=
- ISC_R_SUCCESS) {
- (void)close(manager->pipe_fds[0]);
- (void)close(manager->pipe_fds[1]);
- 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"));
- return (ISC_R_UNEXPECTED);
- }
-#endif /* ISC_PLATFORM_USETHREADS */
- isc_mem_attach(mctx, &manager->mctx);
-
-#ifndef ISC_PLATFORM_USETHREADS
- socketmgr = manager;
-#endif /* ISC_PLATFORM_USETHREADS */
- *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
- (void)close(manager->pipe_fds[0]);
- (void)close(manager->pipe_fds[1]);
- (void)isc_condition_destroy(&manager->shutdown_ok);
-#endif /* ISC_PLATFORM_USETHREADS */
-
- for (i = 0; i < (int)FD_SETSIZE; i++)
- if (manager->fdstate[i] == CLOSE_PENDING)
- (void)close(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) {
- dev->attributes |= ISC_SOCKEVENTATTR_PKTINFO;
- dev->pktinfo = *pktinfo;
-
- if (!isc_sockaddr_issitelocal(&dev->address) &&
- !isc_sockaddr_islinklocal(&dev->address)) {
- socket_log(sock, NULL, TRACE, isc_msgcat,
- ISC_MSGSET_SOCKET, ISC_MSG_PKTINFOPROVIDED,
- "pktinfo structure provided, ifindex %u "
- "(set to 0)", pktinfo->ipi6_ifindex);
-
- /*
- * 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));
-}
-
-void
-isc_socket_cleanunix(isc_sockaddr_t *sockaddr, isc_boolean_t active) {
-#ifdef ISC_PLATFORM_HAVESYSUNH
- int s;
- struct stat sb;
- char strbuf[ISC_STRERRORSIZE];
-
- if (sockaddr->type.sa.sa_family != AF_UNIX)
- return;
-
-#ifndef S_ISSOCK
-#if defined(S_IFMT) && defined(S_IFSOCK)
-#define S_ISSOCK(mode) ((mode & S_IFMT)==S_IFSOCK)
-#elif defined(_S_IFMT) && defined(S_IFSOCK)
-#define S_ISSOCK(mode) ((mode & _S_IFMT)==S_IFSOCK)
-#endif
-#endif
-
-#ifndef S_ISFIFO
-#if defined(S_IFMT) && defined(S_IFIFO)
-#define S_ISFIFO(mode) ((mode & S_IFMT)==S_IFIFO)
-#elif defined(_S_IFMT) && defined(S_IFIFO)
-#define S_ISFIFO(mode) ((mode & _S_IFMT)==S_IFIFO)
-#endif
-#endif
-
-#if !defined(S_ISFIFO) && !defined(S_ISSOCK)
-#error You need to define S_ISFIFO and S_ISSOCK as appropriate for your platform. See <sys/stat.h>.
-#endif
-
-#ifndef S_ISFIFO
-#define S_ISFIFO(mode) 0
-#endif
-
-#ifndef S_ISSOCK
-#define S_ISSOCK(mode) 0
-#endif
-
- if (active) {
- if (stat(sockaddr->type.sunix.sun_path, &sb) < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
- "isc_socket_cleanunix: stat(%s): %s",
- sockaddr->type.sunix.sun_path, strbuf);
- return;
- }
- if (!(S_ISSOCK(sb.st_mode) || S_ISFIFO(sb.st_mode))) {
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
- "isc_socket_cleanunix: %s: not a socket",
- sockaddr->type.sunix.sun_path);
- return;
- }
- if (unlink(sockaddr->type.sunix.sun_path) < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
- "isc_socket_cleanunix: unlink(%s): %s",
- sockaddr->type.sunix.sun_path, strbuf);
- }
- return;
- }
-
- s = socket(AF_UNIX, SOCK_STREAM, 0);
- if (s < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
- "isc_socket_cleanunix: socket(%s): %s",
- sockaddr->type.sunix.sun_path, strbuf);
- return;
- }
-
- if (stat(sockaddr->type.sunix.sun_path, &sb) < 0) {
- switch (errno) {
- case ENOENT: /* We exited cleanly last time */
- break;
- default:
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
- "isc_socket_cleanunix: stat(%s): %s",
- sockaddr->type.sunix.sun_path, strbuf);
- break;
- }
- goto cleanup;
- }
-
- if (!(S_ISSOCK(sb.st_mode) || S_ISFIFO(sb.st_mode))) {
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
- "isc_socket_cleanunix: %s: not a socket",
- sockaddr->type.sunix.sun_path);
- goto cleanup;
- }
-
- if (connect(s, (struct sockaddr *)&sockaddr->type.sunix,
- sizeof(sockaddr->type.sunix)) < 0) {
- switch (errno) {
- case ECONNREFUSED:
- case ECONNRESET:
- if (unlink(sockaddr->type.sunix.sun_path) < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET,
- ISC_LOG_WARNING,
- "isc_socket_cleanunix: "
- "unlink(%s): %s",
- sockaddr->type.sunix.sun_path,
- strbuf);
- }
- break;
- default:
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_WARNING,
- "isc_socket_cleanunix: connect(%s): %s",
- sockaddr->type.sunix.sun_path, strbuf);
- break;
- }
- }
- cleanup:
- close(s);
-#else
- UNUSED(sockaddr);
- UNUSED(active);
-#endif
-}
-
-isc_result_t
-isc_socket_permunix(isc_sockaddr_t *sockaddr, isc_uint32_t perm,
- isc_uint32_t owner, isc_uint32_t group)
-{
-#ifdef ISC_PLATFORM_HAVESYSUNH
- isc_result_t result = ISC_R_SUCCESS;
- char strbuf[ISC_STRERRORSIZE];
- char path[sizeof(sockaddr->type.sunix.sun_path)];
-#ifdef NEED_SECURE_DIRECTORY
- char *slash;
-#endif
-
- REQUIRE(sockaddr->type.sa.sa_family == AF_UNIX);
- INSIST(strlen(sockaddr->type.sunix.sun_path) < sizeof(path));
- strcpy(path, sockaddr->type.sunix.sun_path);
-
-#ifdef NEED_SECURE_DIRECTORY
- slash = strrchr(path, '/');
- if (slash != NULL) {
- if (slash != path)
- *slash = '\0';
- else
- strcpy(path, "/");
- } else
- strcpy(path, ".");
-#endif
-
- if (chmod(path, perm) < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
- "isc_socket_permunix: chmod(%s, %d): %s",
- path, perm, strbuf);
- result = ISC_R_FAILURE;
- }
- if (chown(path, owner, group) < 0) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
- ISC_LOGMODULE_SOCKET, ISC_LOG_ERROR,
- "isc_socket_permunix: chown(%s, %d, %d): %s",
- path, owner, group,
- strbuf);
- result = ISC_R_FAILURE;
- }
- return (result);
-#else
- UNUSED(sockaddr);
- UNUSED(perm);
- UNUSED(owner);
- UNUSED(group);
- return (ISC_R_NOTIMPLEMENTED);
-#endif
-}
-
-isc_result_t
-isc_socket_bind(isc_socket_t *sock, isc_sockaddr_t *sockaddr) {
- 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);
- }
- /*
- * Only set SO_REUSEADDR when we want a specific port.
- */
-#ifdef AF_UNIX
- if (sock->pf == AF_UNIX)
- goto bind_socket;
-#endif
- if (isc_sockaddr_getport(sockaddr) != (in_port_t)0 &&
- 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... */
- }
-#ifdef AF_UNIX
- bind_socket:
-#endif
- if (bind(sock->fd, &sockaddr->type.sa, sockaddr->length) < 0) {
- UNLOCK(&sock->lock);
- switch (errno) {
- case EACCES:
- return (ISC_R_NOPERM);
- case EADDRNOTAVAIL:
- return (ISC_R_ADDRNOTAVAIL);
- case EADDRINUSE:
- return (ISC_R_ADDRINUSE);
- case EINVAL:
- return (ISC_R_BOUND);
- default:
- isc__strerror(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);
-}
-
-isc_result_t
-isc_socket_filter(isc_socket_t *sock, const char *filter) {
-#ifdef SO_ACCEPTFILTER
- char strbuf[ISC_STRERRORSIZE];
- struct accept_filter_arg afa;
-#else
- UNUSED(sock);
- UNUSED(filter);
-#endif
-
- REQUIRE(VALID_SOCKET(sock));
-
-#ifdef SO_ACCEPTFILTER
- bzero(&afa, sizeof(afa));
- strncpy(afa.af_name, filter, sizeof(afa.af_name));
- if (setsockopt(sock->fd, SOL_SOCKET, SO_ACCEPTFILTER,
- &afa, sizeof(afa)) == -1) {
- isc__strerror(errno, strbuf, sizeof(strbuf));
- socket_log(sock, NULL, CREATION, isc_msgcat, ISC_MSGSET_SOCKET,
- ISC_MSG_FILTER, "setsockopt(SO_ACCEPTFILTER): %s",
- strbuf);
- return (ISC_R_FAILURE);
- }
- return (ISC_R_SUCCESS);
-#else
- return (ISC_R_NOTIMPLEMENTED);
-#endif
-}
-
-/*
- * 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 ||
- sock->type == isc_sockettype_unix);
-
- if (backlog == 0)
- backlog = SOMAXCONN;
-
- if (listen(sock->fd, (int)backlog) < 0) {
- UNLOCK(&sock->lock);
- isc__strerror(errno, 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 result;
- 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);
-
- result = allocate_socket(manager, sock->type, &nsock);
- if (result != ISC_R_SUCCESS) {
- isc_event_free(ISC_EVENT_PTR(&dev));
- UNLOCK(&sock->lock);
- return (result);
- }
-
- /*
- * 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;
- 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) {
- if (SOFT_ERROR(errno) || errno == EINPROGRESS)
- goto queue;
-
- switch (errno) {
-#define ERROR_MATCH(a, b) case a: dev->result = b; goto err_exit;
- ERROR_MATCH(EACCES, ISC_R_NOPERM);
- ERROR_MATCH(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
- ERROR_MATCH(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
- ERROR_MATCH(ECONNREFUSED, ISC_R_CONNREFUSED);
- ERROR_MATCH(EHOSTUNREACH, ISC_R_HOSTUNREACH);
-#ifdef EHOSTDOWN
- ERROR_MATCH(EHOSTDOWN, ISC_R_HOSTUNREACH);
-#endif
- ERROR_MATCH(ENETUNREACH, ISC_R_NETUNREACH);
- ERROR_MATCH(ENOBUFS, ISC_R_NORESOURCES);
- ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH);
- ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED);
- ERROR_MATCH(ECONNRESET, ISC_R_CONNECTIONRESET);
-#undef ERROR_MATCH
- }
-
- sock->connected = 0;
-
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__, "%d/%s", errno, strbuf);
-
- UNLOCK(&sock->lock);
- isc_event_free(ISC_EVENT_PTR(&dev));
- return (ISC_R_UNEXPECTED);
-
- err_exit:
- sock->connected = 0;
- isc_task_send(task, ISC_EVENT_PTR(&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_PTR(&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;
- char strbuf[ISC_STRERRORSIZE];
- char peerbuf[ISC_SOCKADDR_FORMATSIZE];
-
- 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)
- cc = errno;
- else
- errno = cc;
-
- if (errno != 0) {
- /*
- * If the error is EAGAIN, just re-select on this
- * fd and pretend nothing strange happened.
- */
- if (SOFT_ERROR(errno) || errno == EINPROGRESS) {
- sock->connecting = 1;
- select_poke(sock->manager, sock->fd,
- SELECT_POKE_CONNECT);
- UNLOCK(&sock->lock);
-
- return;
- }
-
- /*
- * Translate other errors into ISC_R_* flavors.
- */
- switch (errno) {
-#define ERROR_MATCH(a, b) case a: dev->result = b; break;
- ERROR_MATCH(EACCES, ISC_R_NOPERM);
- ERROR_MATCH(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
- ERROR_MATCH(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
- ERROR_MATCH(ECONNREFUSED, ISC_R_CONNREFUSED);
- ERROR_MATCH(EHOSTUNREACH, ISC_R_HOSTUNREACH);
-#ifdef EHOSTDOWN
- ERROR_MATCH(EHOSTDOWN, ISC_R_HOSTUNREACH);
-#endif
- ERROR_MATCH(ENETUNREACH, ISC_R_NETUNREACH);
- ERROR_MATCH(ENOBUFS, ISC_R_NORESOURCES);
- ERROR_MATCH(EPERM, ISC_R_HOSTUNREACH);
- ERROR_MATCH(EPIPE, ISC_R_NOTCONNECTED);
- ERROR_MATCH(ETIMEDOUT, ISC_R_TIMEDOUT);
- ERROR_MATCH(ECONNRESET, ISC_R_CONNECTIONRESET);
-#undef ERROR_MATCH
- default:
- dev->result = ISC_R_UNEXPECTED;
- isc_sockaddr_format(&sock->address, peerbuf,
- sizeof(peerbuf));
- isc__strerror(errno, strbuf, sizeof(strbuf));
- UNEXPECTED_ERROR(__FILE__, __LINE__,
- "internal_connect: connect(%s) %s",
- peerbuf, 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_PTR(&dev));
-}
-
-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);
-
- 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) {
- ISC_SOCKADDR_LEN_T len;
- isc_result_t result;
- char strbuf[ISC_STRERRORSIZE];
-
- REQUIRE(VALID_SOCKET(sock));
- REQUIRE(addressp != NULL);
-
- LOCK(&sock->lock);
-
- 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) {
- isc__strerror(errno, 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);
-
- /*
- * 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_PTR(&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_PTR(&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);
-}
-
-void
-isc_socket_ipv6only(isc_socket_t *sock, isc_boolean_t yes) {
-#if defined(IPV6_V6ONLY)
- int onoff = yes ? 1 : 0;
-#else
- UNUSED(yes);
- UNUSED(sock);
-#endif
-
- REQUIRE(VALID_SOCKET(sock));
-
-#ifdef IPV6_V6ONLY
- if (sock->pf == AF_INET6) {
- (void)setsockopt(sock->fd, IPPROTO_IPV6, IPV6_V6ONLY,
- (void *)&onoff, sizeof(onoff));
- }
-#endif
-}
-
-#ifndef ISC_PLATFORM_USETHREADS
-void
-isc__socketmgr_getfdsets(fd_set *readset, fd_set *writeset, int *maxfd) {
- if (socketmgr == NULL)
- *maxfd = 0;
- else {
- *readset = socketmgr->read_fds;
- *writeset = socketmgr->write_fds;
- *maxfd = socketmgr->maxfd + 1;
- }
-}
-
-isc_result_t
-isc__socketmgr_dispatch(fd_set *readset, fd_set *writeset, int maxfd) {
- isc_socketmgr_t *manager = socketmgr;
-
- if (manager == NULL)
- return (ISC_R_NOTFOUND);
-
- process_fds(manager, maxfd, readset, writeset);
- return (ISC_R_SUCCESS);
-}
-#endif /* ISC_PLATFORM_USETHREADS */
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