mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
e232ba946f
There were some reports that strace output an LDAP server socket is in CLOSE_WAIT state, returning EAGAIN for writev over and over (after a call to epoll() each time). In the tstream_bsd code the problem happens when we have a pending writev_send, while there's no readv_send pending. In that case we still ask for TEVENT_FD_READ in order to notice connection errors early, so we try to call writev even if the socket doesn't report TEVENT_FD_WRITE. And there are situations where we do that over and over again. It happens like this with a Linux kernel: tcp_fin() has this: struct tcp_sock *tp = tcp_sk(sk); inet_csk_schedule_ack(sk); sk->sk_shutdown |= RCV_SHUTDOWN; sock_set_flag(sk, SOCK_DONE); switch (sk->sk_state) { case TCP_SYN_RECV: case TCP_ESTABLISHED: /* Move to CLOSE_WAIT */ tcp_set_state(sk, TCP_CLOSE_WAIT); inet_csk_enter_pingpong_mode(sk); break; It means RCV_SHUTDOWN gets set as well as TCP_CLOSE_WAIT, but sk->sk_err is not changed to indicate an error. tcp_sendmsg_locked has this: ... err = -EPIPE; if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) goto do_error; while (msg_data_left(msg)) { int copy = 0; skb = tcp_write_queue_tail(sk); if (skb) copy = size_goal - skb->len; if (copy <= 0 || !tcp_skb_can_collapse_to(skb)) { bool first_skb; new_segment: if (!sk_stream_memory_free(sk)) goto wait_for_space; ... wait_for_space: set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); if (copied) tcp_push(sk, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH, size_goal); err = sk_stream_wait_memory(sk, &timeo); if (err != 0) goto do_error; It means if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) doesn't hit as we only have RCV_SHUTDOWN and sk_stream_wait_memory returns -EAGAIN. tcp_poll has this: if (sk->sk_shutdown & RCV_SHUTDOWN) mask |= EPOLLIN | EPOLLRDNORM | EPOLLRDHUP; So we'll get EPOLLIN | EPOLLRDNORM | EPOLLRDHUP triggering TEVENT_FD_READ and writev/sendmsg keeps getting EAGAIN. So we need to always clear TEVENT_FD_READ if we don't have readable handler in order to avoid burning cpu. But we turn it on again after a timeout of 1 second in order to monitor the error state of the connection. And now that our tsocket_bsd_error() helper checks for POLLRDHUP, we can check if the socket is in an error state before calling the writable handler when TEVENT_FD_READ was reported. Only on error we'll call the writable handler, which will pick the error without calling writev(). BUG: https://bugzilla.samba.org/show_bug.cgi?id=15202 Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
2927 lines
59 KiB
C
2927 lines
59 KiB
C
/*
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Unix SMB/CIFS implementation.
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Copyright (C) Stefan Metzmacher 2009
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** NOTE! The following LGPL license applies to the tsocket
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** library. This does NOT imply that all of Samba is released
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** under the LGPL
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/filesys.h"
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#include "system/network.h"
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#include "system/select.h"
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#include "tsocket.h"
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#include "tsocket_internal.h"
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#include "lib/util/select.h"
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#include "lib/util/iov_buf.h"
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#include "lib/util/blocking.h"
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#include "lib/util/util_net.h"
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#include "lib/util/samba_util.h"
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static int tsocket_bsd_error_from_errno(int ret,
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int sys_errno,
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bool *retry)
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{
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*retry = false;
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if (ret >= 0) {
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return 0;
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}
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if (ret != -1) {
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return EIO;
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}
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if (sys_errno == 0) {
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return EIO;
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}
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if (sys_errno == EINTR) {
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*retry = true;
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return sys_errno;
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}
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if (sys_errno == EINPROGRESS) {
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*retry = true;
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return sys_errno;
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}
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if (sys_errno == EAGAIN) {
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*retry = true;
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return sys_errno;
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}
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/* ENOMEM is retryable on Solaris/illumos, and possibly other systems. */
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if (sys_errno == ENOMEM) {
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*retry = true;
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return sys_errno;
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}
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#ifdef EWOULDBLOCK
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if (sys_errno == EWOULDBLOCK) {
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*retry = true;
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return sys_errno;
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}
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#endif
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return sys_errno;
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}
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static int tsocket_bsd_common_prepare_fd(int fd, bool high_fd)
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{
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int i;
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int sys_errno = 0;
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int fds[3];
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int num_fds = 0;
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int result;
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bool ok;
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if (fd == -1) {
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return -1;
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}
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/* first make a fd >= 3 */
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if (high_fd) {
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while (fd < 3) {
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fds[num_fds++] = fd;
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fd = dup(fd);
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if (fd == -1) {
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sys_errno = errno;
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break;
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}
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}
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for (i=0; i<num_fds; i++) {
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close(fds[i]);
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}
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if (fd == -1) {
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errno = sys_errno;
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return fd;
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}
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}
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result = set_blocking(fd, false);
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if (result == -1) {
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goto fail;
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}
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ok = smb_set_close_on_exec(fd);
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if (!ok) {
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goto fail;
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}
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return fd;
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fail:
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if (fd != -1) {
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sys_errno = errno;
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close(fd);
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errno = sys_errno;
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}
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return -1;
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}
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#ifdef HAVE_LINUX_RTNETLINK_H
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/**
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* Get the amount of pending bytes from a netlink socket
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*
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* For some reason netlink sockets don't support querying the amount of pending
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* data via ioctl with FIONREAD, which is what we use in tsocket_bsd_pending()
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* below.
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*
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* We know we are on Linux as we're using netlink, which means we have a working
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* MSG_TRUNC flag to recvmsg() as well, so we use that together with MSG_PEEK.
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**/
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static ssize_t tsocket_bsd_netlink_pending(int fd)
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{
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struct iovec iov;
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struct msghdr msg;
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char buf[1];
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iov = (struct iovec) {
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.iov_base = buf,
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.iov_len = sizeof(buf)
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};
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msg = (struct msghdr) {
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.msg_iov = &iov,
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.msg_iovlen = 1
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};
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return recvmsg(fd, &msg, MSG_PEEK | MSG_TRUNC);
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}
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#else
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static ssize_t tsocket_bsd_netlink_pending(int fd)
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{
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errno = ENOSYS;
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return -1;
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}
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#endif
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static int tsocket_bsd_poll_error(int fd)
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{
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struct pollfd pfd = {
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.fd = fd,
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#ifdef POLLRDHUP
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.events = POLLRDHUP, /* POLLERR and POLLHUP are not needed */
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#endif
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};
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int ret;
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errno = 0;
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ret = sys_poll_intr(&pfd, 1, 0);
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if (ret == 0) {
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return 0;
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}
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if (ret != 1) {
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return POLLNVAL;
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}
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if (pfd.revents & POLLERR) {
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return POLLERR;
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}
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if (pfd.revents & POLLHUP) {
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return POLLHUP;
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}
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#ifdef POLLRDHUP
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if (pfd.revents & POLLRDHUP) {
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return POLLRDHUP;
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}
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#endif
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/* should never be reached! */
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return POLLNVAL;
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}
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static int tsocket_bsd_sock_error(int fd)
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{
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int ret, error = 0;
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socklen_t len = sizeof(error);
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/*
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* if no data is available check if the socket is in error state. For
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* dgram sockets it's the way to return ICMP error messages of
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* connected sockets to the caller.
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*/
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ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len);
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if (ret == -1) {
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return ret;
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}
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if (error != 0) {
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errno = error;
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return -1;
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}
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return 0;
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}
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static int tsocket_bsd_error(int fd)
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{
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int ret;
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int poll_error = 0;
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poll_error = tsocket_bsd_poll_error(fd);
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if (poll_error == 0) {
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return 0;
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}
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#ifdef POLLRDHUP
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if (poll_error == POLLRDHUP) {
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errno = ECONNRESET;
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return -1;
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}
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#endif
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if (poll_error == POLLHUP) {
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errno = EPIPE;
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return -1;
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}
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/*
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* POLLERR and POLLNVAL fallback to
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* getsockopt(fd, SOL_SOCKET, SO_ERROR)
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* and force EPIPE as fallback.
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*/
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errno = 0;
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ret = tsocket_bsd_sock_error(fd);
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if (ret == 0) {
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errno = EPIPE;
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}
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if (errno == 0) {
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errno = EPIPE;
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}
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return -1;
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}
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static ssize_t tsocket_bsd_pending(int fd)
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{
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int ret;
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int value = 0;
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ret = ioctl(fd, FIONREAD, &value);
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if (ret == -1) {
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return ret;
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}
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if (ret != 0) {
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/* this should not be reached */
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errno = EIO;
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return -1;
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}
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if (value != 0) {
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return value;
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}
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return tsocket_bsd_error(fd);
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}
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static const struct tsocket_address_ops tsocket_address_bsd_ops;
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int _tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx,
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const struct sockaddr *sa,
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size_t sa_socklen,
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struct tsocket_address **_addr,
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const char *location)
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{
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struct tsocket_address *addr;
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struct samba_sockaddr *bsda = NULL;
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if (sa_socklen < sizeof(sa->sa_family)) {
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errno = EINVAL;
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return -1;
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}
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switch (sa->sa_family) {
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case AF_UNIX:
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if (sa_socklen > sizeof(struct sockaddr_un)) {
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sa_socklen = sizeof(struct sockaddr_un);
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}
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break;
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case AF_INET:
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if (sa_socklen < sizeof(struct sockaddr_in)) {
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errno = EINVAL;
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return -1;
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}
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sa_socklen = sizeof(struct sockaddr_in);
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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if (sa_socklen < sizeof(struct sockaddr_in6)) {
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errno = EINVAL;
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return -1;
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}
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sa_socklen = sizeof(struct sockaddr_in6);
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break;
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#endif
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default:
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errno = EAFNOSUPPORT;
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return -1;
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}
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if (sa_socklen > sizeof(struct sockaddr_storage)) {
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errno = EINVAL;
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return -1;
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}
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addr = tsocket_address_create(mem_ctx,
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&tsocket_address_bsd_ops,
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&bsda,
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struct samba_sockaddr,
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location);
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if (!addr) {
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errno = ENOMEM;
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return -1;
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}
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ZERO_STRUCTP(bsda);
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memcpy(&bsda->u.ss, sa, sa_socklen);
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bsda->sa_socklen = sa_socklen;
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#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
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bsda->u.sa.sa_len = bsda->sa_socklen;
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#endif
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*_addr = addr;
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return 0;
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}
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int _tsocket_address_bsd_from_samba_sockaddr(TALLOC_CTX *mem_ctx,
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const struct samba_sockaddr *xs_addr,
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struct tsocket_address **t_addr,
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const char *location)
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{
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return _tsocket_address_bsd_from_sockaddr(mem_ctx,
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&xs_addr->u.sa,
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xs_addr->sa_socklen,
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t_addr,
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location);
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}
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ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr,
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struct sockaddr *sa,
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size_t sa_socklen)
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{
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struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
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struct samba_sockaddr);
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if (!bsda) {
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errno = EINVAL;
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return -1;
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}
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if (sa_socklen < bsda->sa_socklen) {
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errno = EINVAL;
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return -1;
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}
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if (sa_socklen > bsda->sa_socklen) {
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memset(sa, 0, sa_socklen);
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sa_socklen = bsda->sa_socklen;
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}
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memcpy(sa, &bsda->u.ss, sa_socklen);
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#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
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sa->sa_len = sa_socklen;
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#endif
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return sa_socklen;
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}
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|
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bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam)
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{
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struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
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struct samba_sockaddr);
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|
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if (!bsda) {
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return false;
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}
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|
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switch (bsda->u.sa.sa_family) {
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case AF_INET:
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if (strcasecmp(fam, "ip") == 0) {
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return true;
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}
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if (strcasecmp(fam, "ipv4") == 0) {
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return true;
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}
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return false;
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#ifdef HAVE_IPV6
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case AF_INET6:
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if (strcasecmp(fam, "ip") == 0) {
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return true;
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}
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|
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if (strcasecmp(fam, "ipv6") == 0) {
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return true;
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}
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return false;
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#endif
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}
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|
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return false;
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}
|
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|
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int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx,
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const char *fam,
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const char *addr,
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uint16_t port,
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struct tsocket_address **_addr,
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const char *location)
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{
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struct addrinfo hints;
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struct addrinfo *result = NULL;
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char port_str[6];
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int ret;
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|
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ZERO_STRUCT(hints);
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/*
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* we use SOCKET_STREAM here to get just one result
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* back from getaddrinfo().
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*/
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
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|
|
|
if (strcasecmp(fam, "ip") == 0) {
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hints.ai_family = AF_UNSPEC;
|
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if (!addr) {
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|
#ifdef HAVE_IPV6
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addr = "::";
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#else
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addr = "0.0.0.0";
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#endif
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}
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} else if (strcasecmp(fam, "ipv4") == 0) {
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hints.ai_family = AF_INET;
|
|
if (!addr) {
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|
addr = "0.0.0.0";
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}
|
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#ifdef HAVE_IPV6
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} else if (strcasecmp(fam, "ipv6") == 0) {
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hints.ai_family = AF_INET6;
|
|
if (!addr) {
|
|
addr = "::";
|
|
}
|
|
#endif
|
|
} else {
|
|
errno = EAFNOSUPPORT;
|
|
return -1;
|
|
}
|
|
|
|
snprintf(port_str, sizeof(port_str), "%u", port);
|
|
|
|
ret = getaddrinfo(addr, port_str, &hints, &result);
|
|
if (ret != 0) {
|
|
switch (ret) {
|
|
case EAI_FAIL:
|
|
case EAI_NONAME:
|
|
#ifdef EAI_ADDRFAMILY
|
|
case EAI_ADDRFAMILY:
|
|
#endif
|
|
errno = EINVAL;
|
|
break;
|
|
}
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
if (result->ai_socktype != SOCK_STREAM) {
|
|
errno = EINVAL;
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
|
|
result->ai_addr,
|
|
result->ai_addrlen,
|
|
_addr,
|
|
location);
|
|
|
|
done:
|
|
if (result) {
|
|
freeaddrinfo(result);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int _tsocket_address_inet_from_hostport_strings(TALLOC_CTX *mem_ctx,
|
|
const char *fam,
|
|
const char *host_port_addr,
|
|
uint16_t default_port,
|
|
struct tsocket_address **_addr,
|
|
const char *location)
|
|
{
|
|
char *pl_sq = NULL;
|
|
char *pr_sq = NULL;
|
|
char *pl_period = NULL;
|
|
char *port_sep = NULL;
|
|
char *cport = NULL;
|
|
char *buf = NULL;
|
|
uint64_t port = 0;
|
|
int ret;
|
|
char *s_addr = NULL;
|
|
uint16_t s_port = default_port;
|
|
bool conv_ret;
|
|
bool is_ipv6_by_squares = false;
|
|
|
|
if (host_port_addr == NULL) {
|
|
/* got straight to next function if host_port_addr is NULL */
|
|
goto get_addr;
|
|
}
|
|
buf = talloc_strdup(mem_ctx, host_port_addr);
|
|
if (buf == NULL) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
pl_period = strchr_m(buf, '.');
|
|
port_sep = strrchr_m(buf, ':');
|
|
pl_sq = strchr_m(buf, '[');
|
|
pr_sq = strrchr_m(buf, ']');
|
|
/* See if its IPv4 or IPv6 */
|
|
/* Only parse IPv6 with squares with/without port, and IPv4 with port */
|
|
/* Everything else, let tsocket_address_inet_from string() */
|
|
/* find parsing errors */
|
|
#ifdef HAVE_IPV6
|
|
is_ipv6_by_squares = (pl_sq != NULL && pr_sq != NULL && pr_sq > pl_sq);
|
|
#endif
|
|
if (is_ipv6_by_squares) {
|
|
/* IPv6 possibly with port - squares detected */
|
|
port_sep = pr_sq + 1;
|
|
if (*port_sep == '\0') {
|
|
s_addr = pl_sq + 1;
|
|
*pr_sq = 0;
|
|
s_port = default_port;
|
|
goto get_addr;
|
|
}
|
|
if (*port_sep != ':') {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
cport = port_sep + 1;
|
|
conv_ret = conv_str_u64(cport, &port);
|
|
if (!conv_ret) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (port > 65535) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
s_port = (uint16_t)port;
|
|
*port_sep = 0;
|
|
*pr_sq = 0;
|
|
s_addr = pl_sq + 1;
|
|
*pl_sq = 0;
|
|
goto get_addr;
|
|
} else if (pl_period != NULL && port_sep != NULL) {
|
|
/* IPv4 with port - more than one period in string */
|
|
cport = port_sep + 1;
|
|
conv_ret = conv_str_u64(cport, &port);
|
|
if (!conv_ret) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (port > 65535) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
s_port = (uint16_t)port;
|
|
*port_sep = 0;
|
|
s_addr = buf;
|
|
goto get_addr;
|
|
} else {
|
|
/* Everything else, let tsocket_address_inet_from string() */
|
|
/* find parsing errors */
|
|
s_addr = buf;
|
|
s_port = default_port;
|
|
goto get_addr;
|
|
}
|
|
get_addr:
|
|
ret = _tsocket_address_inet_from_strings(
|
|
mem_ctx, fam, s_addr, s_port, _addr, location);
|
|
|
|
return ret;
|
|
}
|
|
|
|
char *tsocket_address_inet_addr_string(const struct tsocket_address *addr,
|
|
TALLOC_CTX *mem_ctx)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
char addr_str[INET6_ADDRSTRLEN+1];
|
|
const char *str;
|
|
|
|
if (!bsda) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
str = inet_ntop(bsda->u.in.sin_family,
|
|
&bsda->u.in.sin_addr,
|
|
addr_str, sizeof(addr_str));
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
str = inet_ntop(bsda->u.in6.sin6_family,
|
|
&bsda->u.in6.sin6_addr,
|
|
addr_str, sizeof(addr_str));
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
if (!str) {
|
|
return NULL;
|
|
}
|
|
|
|
return talloc_strdup(mem_ctx, str);
|
|
}
|
|
|
|
uint16_t tsocket_address_inet_port(const struct tsocket_address *addr)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
uint16_t port = 0;
|
|
|
|
if (!bsda) {
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
port = ntohs(bsda->u.in.sin_port);
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
port = ntohs(bsda->u.in6.sin6_port);
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
return port;
|
|
}
|
|
|
|
int tsocket_address_inet_set_port(struct tsocket_address *addr,
|
|
uint16_t port)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
|
|
if (!bsda) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
bsda->u.in.sin_port = htons(port);
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
bsda->u.in6.sin6_port = htons(port);
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool tsocket_address_is_unix(const struct tsocket_address *addr)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
|
|
if (!bsda) {
|
|
return false;
|
|
}
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx,
|
|
const char *path,
|
|
struct tsocket_address **_addr,
|
|
const char *location)
|
|
{
|
|
struct sockaddr_un un;
|
|
void *p = &un;
|
|
int ret;
|
|
|
|
if (!path) {
|
|
path = "";
|
|
}
|
|
|
|
if (strlen(path) > sizeof(un.sun_path)-1) {
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
|
|
ZERO_STRUCT(un);
|
|
un.sun_family = AF_UNIX;
|
|
strncpy(un.sun_path, path, sizeof(un.sun_path)-1);
|
|
|
|
ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
|
|
(struct sockaddr *)p,
|
|
sizeof(un),
|
|
_addr,
|
|
location);
|
|
|
|
return ret;
|
|
}
|
|
|
|
char *tsocket_address_unix_path(const struct tsocket_address *addr,
|
|
TALLOC_CTX *mem_ctx)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
const char *str;
|
|
|
|
if (!bsda) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
str = bsda->u.un.sun_path;
|
|
break;
|
|
default:
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
return talloc_strdup(mem_ctx, str);
|
|
}
|
|
|
|
static char *tsocket_address_bsd_string(const struct tsocket_address *addr,
|
|
TALLOC_CTX *mem_ctx)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
char *str;
|
|
char *addr_str;
|
|
const char *prefix = NULL;
|
|
uint16_t port;
|
|
|
|
switch (bsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
return talloc_asprintf(mem_ctx, "unix:%s",
|
|
bsda->u.un.sun_path);
|
|
case AF_INET:
|
|
prefix = "ipv4";
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
prefix = "ipv6";
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
addr_str = tsocket_address_inet_addr_string(addr, mem_ctx);
|
|
if (!addr_str) {
|
|
return NULL;
|
|
}
|
|
|
|
port = tsocket_address_inet_port(addr);
|
|
|
|
str = talloc_asprintf(mem_ctx, "%s:%s:%u",
|
|
prefix, addr_str, port);
|
|
talloc_free(addr_str);
|
|
|
|
return str;
|
|
}
|
|
|
|
static struct tsocket_address *tsocket_address_bsd_copy(const struct tsocket_address *addr,
|
|
TALLOC_CTX *mem_ctx,
|
|
const char *location)
|
|
{
|
|
struct samba_sockaddr *bsda = talloc_get_type(addr->private_data,
|
|
struct samba_sockaddr);
|
|
struct tsocket_address *copy;
|
|
int ret;
|
|
|
|
ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
|
|
&bsda->u.sa,
|
|
bsda->sa_socklen,
|
|
©,
|
|
location);
|
|
if (ret != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
return copy;
|
|
}
|
|
|
|
static const struct tsocket_address_ops tsocket_address_bsd_ops = {
|
|
.name = "bsd",
|
|
.string = tsocket_address_bsd_string,
|
|
.copy = tsocket_address_bsd_copy,
|
|
};
|
|
|
|
struct tdgram_bsd {
|
|
int fd;
|
|
|
|
void *event_ptr;
|
|
struct tevent_fd *fde;
|
|
bool optimize_recvfrom;
|
|
bool netlink;
|
|
|
|
void *readable_private;
|
|
void (*readable_handler)(void *private_data);
|
|
void *writeable_private;
|
|
void (*writeable_handler)(void *private_data);
|
|
};
|
|
|
|
bool tdgram_bsd_optimize_recvfrom(struct tdgram_context *dgram,
|
|
bool on)
|
|
{
|
|
struct tdgram_bsd *bsds =
|
|
talloc_get_type(_tdgram_context_data(dgram),
|
|
struct tdgram_bsd);
|
|
bool old;
|
|
|
|
if (bsds == NULL) {
|
|
/* not a bsd socket */
|
|
return false;
|
|
}
|
|
|
|
old = bsds->optimize_recvfrom;
|
|
bsds->optimize_recvfrom = on;
|
|
|
|
return old;
|
|
}
|
|
|
|
static void tdgram_bsd_fde_handler(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
|
|
struct tdgram_bsd);
|
|
|
|
if (flags & TEVENT_FD_WRITE) {
|
|
bsds->writeable_handler(bsds->writeable_private);
|
|
return;
|
|
}
|
|
if (flags & TEVENT_FD_READ) {
|
|
if (!bsds->readable_handler) {
|
|
TEVENT_FD_NOT_READABLE(bsds->fde);
|
|
return;
|
|
}
|
|
bsds->readable_handler(bsds->readable_private);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
|
|
struct tevent_context *ev,
|
|
void (*handler)(void *private_data),
|
|
void *private_data)
|
|
{
|
|
if (ev == NULL) {
|
|
if (handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (!bsds->readable_handler) {
|
|
return 0;
|
|
}
|
|
bsds->readable_handler = NULL;
|
|
bsds->readable_private = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* read and write must use the same tevent_context */
|
|
if (bsds->event_ptr != ev) {
|
|
if (bsds->readable_handler || bsds->writeable_handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
bsds->event_ptr = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
}
|
|
|
|
if (tevent_fd_get_flags(bsds->fde) == 0) {
|
|
TALLOC_FREE(bsds->fde);
|
|
|
|
bsds->fde = tevent_add_fd(ev, bsds,
|
|
bsds->fd, TEVENT_FD_READ,
|
|
tdgram_bsd_fde_handler,
|
|
bsds);
|
|
if (!bsds->fde) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/* cache the event context we're running on */
|
|
bsds->event_ptr = ev;
|
|
} else if (!bsds->readable_handler) {
|
|
TEVENT_FD_READABLE(bsds->fde);
|
|
}
|
|
|
|
bsds->readable_handler = handler;
|
|
bsds->readable_private = private_data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
|
|
struct tevent_context *ev,
|
|
void (*handler)(void *private_data),
|
|
void *private_data)
|
|
{
|
|
if (ev == NULL) {
|
|
if (handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (!bsds->writeable_handler) {
|
|
return 0;
|
|
}
|
|
bsds->writeable_handler = NULL;
|
|
bsds->writeable_private = NULL;
|
|
TEVENT_FD_NOT_WRITEABLE(bsds->fde);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* read and write must use the same tevent_context */
|
|
if (bsds->event_ptr != ev) {
|
|
if (bsds->readable_handler || bsds->writeable_handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
bsds->event_ptr = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
}
|
|
|
|
if (tevent_fd_get_flags(bsds->fde) == 0) {
|
|
TALLOC_FREE(bsds->fde);
|
|
|
|
bsds->fde = tevent_add_fd(ev, bsds,
|
|
bsds->fd, TEVENT_FD_WRITE,
|
|
tdgram_bsd_fde_handler,
|
|
bsds);
|
|
if (!bsds->fde) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/* cache the event context we're running on */
|
|
bsds->event_ptr = ev;
|
|
} else if (!bsds->writeable_handler) {
|
|
TEVENT_FD_WRITEABLE(bsds->fde);
|
|
}
|
|
|
|
bsds->writeable_handler = handler;
|
|
bsds->writeable_private = private_data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct tdgram_bsd_recvfrom_state {
|
|
struct tdgram_context *dgram;
|
|
bool first_try;
|
|
uint8_t *buf;
|
|
size_t len;
|
|
struct tsocket_address *src;
|
|
};
|
|
|
|
static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
|
|
{
|
|
struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
|
|
struct tdgram_bsd);
|
|
|
|
tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tdgram_bsd_recvfrom_handler(void *private_data);
|
|
|
|
static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tdgram_context *dgram)
|
|
{
|
|
struct tevent_req *req;
|
|
struct tdgram_bsd_recvfrom_state *state;
|
|
struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
|
|
int ret;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tdgram_bsd_recvfrom_state);
|
|
if (!req) {
|
|
return NULL;
|
|
}
|
|
|
|
state->dgram = dgram;
|
|
state->first_try= true;
|
|
state->buf = NULL;
|
|
state->len = 0;
|
|
state->src = NULL;
|
|
|
|
talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
|
|
/*
|
|
* this is a fast path, not waiting for the
|
|
* socket to become explicit readable gains
|
|
* about 10%-20% performance in benchmark tests.
|
|
*/
|
|
if (bsds->optimize_recvfrom) {
|
|
/*
|
|
* We only do the optimization on
|
|
* recvfrom if the caller asked for it.
|
|
*
|
|
* This is needed because in most cases
|
|
* we prefer to flush send buffers before
|
|
* receiving incoming requests.
|
|
*/
|
|
tdgram_bsd_recvfrom_handler(req);
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
goto post;
|
|
}
|
|
}
|
|
|
|
ret = tdgram_bsd_set_readable_handler(bsds, ev,
|
|
tdgram_bsd_recvfrom_handler,
|
|
req);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
return req;
|
|
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static void tdgram_bsd_recvfrom_handler(void *private_data)
|
|
{
|
|
struct tevent_req *req = talloc_get_type_abort(private_data,
|
|
struct tevent_req);
|
|
struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
|
|
struct tdgram_bsd_recvfrom_state);
|
|
struct tdgram_context *dgram = state->dgram;
|
|
struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
|
|
struct samba_sockaddr *bsda = NULL;
|
|
ssize_t ret;
|
|
int err;
|
|
bool retry;
|
|
|
|
if (bsds->netlink) {
|
|
ret = tsocket_bsd_netlink_pending(bsds->fd);
|
|
} else {
|
|
ret = tsocket_bsd_pending(bsds->fd);
|
|
}
|
|
|
|
if (state->first_try && ret == 0) {
|
|
state->first_try = false;
|
|
/* retry later */
|
|
return;
|
|
}
|
|
state->first_try = false;
|
|
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/* retry later */
|
|
return;
|
|
}
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
/* note that 'ret' can be 0 here */
|
|
state->buf = talloc_array(state, uint8_t, ret);
|
|
if (tevent_req_nomem(state->buf, req)) {
|
|
return;
|
|
}
|
|
state->len = ret;
|
|
|
|
state->src = tsocket_address_create(state,
|
|
&tsocket_address_bsd_ops,
|
|
&bsda,
|
|
struct samba_sockaddr,
|
|
__location__ "bsd_recvfrom");
|
|
if (tevent_req_nomem(state->src, req)) {
|
|
return;
|
|
}
|
|
|
|
ZERO_STRUCTP(bsda);
|
|
bsda->sa_socklen = sizeof(bsda->u.ss);
|
|
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
|
|
bsda->u.sa.sa_len = bsda->sa_socklen;
|
|
#endif
|
|
|
|
ret = recvfrom(bsds->fd, state->buf, state->len, 0,
|
|
&bsda->u.sa, &bsda->sa_socklen);
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/* retry later */
|
|
return;
|
|
}
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Some systems (FreeBSD, see bug #7115) return too much
|
|
* bytes in tsocket_bsd_pending()/ioctl(fd, FIONREAD, ...),
|
|
* the return value includes some IP/UDP header bytes,
|
|
* while recvfrom() just returns the payload.
|
|
*/
|
|
state->buf = talloc_realloc(state, state->buf, uint8_t, ret);
|
|
if (tevent_req_nomem(state->buf, req)) {
|
|
return;
|
|
}
|
|
state->len = ret;
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
|
|
int *perrno,
|
|
TALLOC_CTX *mem_ctx,
|
|
uint8_t **buf,
|
|
struct tsocket_address **src)
|
|
{
|
|
struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
|
|
struct tdgram_bsd_recvfrom_state);
|
|
ssize_t ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
if (ret == 0) {
|
|
*buf = talloc_move(mem_ctx, &state->buf);
|
|
ret = state->len;
|
|
if (src) {
|
|
*src = talloc_move(mem_ctx, &state->src);
|
|
}
|
|
}
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
struct tdgram_bsd_sendto_state {
|
|
struct tdgram_context *dgram;
|
|
|
|
const uint8_t *buf;
|
|
size_t len;
|
|
const struct tsocket_address *dst;
|
|
|
|
ssize_t ret;
|
|
};
|
|
|
|
static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
|
|
{
|
|
struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
|
|
struct tdgram_bsd);
|
|
|
|
tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tdgram_bsd_sendto_handler(void *private_data);
|
|
|
|
static struct tevent_req *tdgram_bsd_sendto_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tdgram_context *dgram,
|
|
const uint8_t *buf,
|
|
size_t len,
|
|
const struct tsocket_address *dst)
|
|
{
|
|
struct tevent_req *req;
|
|
struct tdgram_bsd_sendto_state *state;
|
|
struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
|
|
int ret;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tdgram_bsd_sendto_state);
|
|
if (!req) {
|
|
return NULL;
|
|
}
|
|
|
|
state->dgram = dgram;
|
|
state->buf = buf;
|
|
state->len = len;
|
|
state->dst = dst;
|
|
state->ret = -1;
|
|
|
|
talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
/*
|
|
* this is a fast path, not waiting for the
|
|
* socket to become explicit writeable gains
|
|
* about 10%-20% performance in benchmark tests.
|
|
*/
|
|
tdgram_bsd_sendto_handler(req);
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
goto post;
|
|
}
|
|
|
|
ret = tdgram_bsd_set_writeable_handler(bsds, ev,
|
|
tdgram_bsd_sendto_handler,
|
|
req);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
return req;
|
|
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static void tdgram_bsd_sendto_handler(void *private_data)
|
|
{
|
|
struct tevent_req *req = talloc_get_type_abort(private_data,
|
|
struct tevent_req);
|
|
struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
|
|
struct tdgram_bsd_sendto_state);
|
|
struct tdgram_context *dgram = state->dgram;
|
|
struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
|
|
struct sockaddr *sa = NULL;
|
|
socklen_t sa_socklen = 0;
|
|
ssize_t ret;
|
|
int err;
|
|
bool retry;
|
|
|
|
if (state->dst) {
|
|
struct samba_sockaddr *bsda =
|
|
talloc_get_type(state->dst->private_data,
|
|
struct samba_sockaddr);
|
|
|
|
sa = &bsda->u.sa;
|
|
sa_socklen = bsda->sa_socklen;
|
|
}
|
|
|
|
ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_socklen);
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/* retry later */
|
|
return;
|
|
}
|
|
|
|
if (err == EMSGSIZE) {
|
|
/* round up in 1K increments */
|
|
int bufsize = ((state->len + 1023) & (~1023));
|
|
|
|
ret = setsockopt(bsds->fd, SOL_SOCKET, SO_SNDBUF, &bufsize,
|
|
sizeof(bufsize));
|
|
if (ret == 0) {
|
|
/*
|
|
* We do the retry here, rather then via the
|
|
* handler, as we only want to retry once for
|
|
* this condition, so if there is a mismatch
|
|
* between what setsockopt() accepts and what can
|
|
* actually be sent, we do not end up in a
|
|
* loop.
|
|
*/
|
|
|
|
ret = sendto(bsds->fd, state->buf, state->len,
|
|
0, sa, sa_socklen);
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) { /* retry later */
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
state->ret = ret;
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
|
|
{
|
|
struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
|
|
struct tdgram_bsd_sendto_state);
|
|
ssize_t ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
if (ret == 0) {
|
|
ret = state->ret;
|
|
}
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
struct tdgram_bsd_disconnect_state {
|
|
uint8_t __dummy;
|
|
};
|
|
|
|
static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tdgram_context *dgram)
|
|
{
|
|
struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
|
|
struct tevent_req *req;
|
|
struct tdgram_bsd_disconnect_state *state;
|
|
int ret;
|
|
int err;
|
|
bool dummy;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tdgram_bsd_disconnect_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
TALLOC_FREE(bsds->fde);
|
|
ret = close(bsds->fd);
|
|
bsds->fd = -1;
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
|
|
if (tevent_req_error(req, err)) {
|
|
goto post;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
|
|
int *perrno)
|
|
{
|
|
int ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
static const struct tdgram_context_ops tdgram_bsd_ops = {
|
|
.name = "bsd",
|
|
|
|
.recvfrom_send = tdgram_bsd_recvfrom_send,
|
|
.recvfrom_recv = tdgram_bsd_recvfrom_recv,
|
|
|
|
.sendto_send = tdgram_bsd_sendto_send,
|
|
.sendto_recv = tdgram_bsd_sendto_recv,
|
|
|
|
.disconnect_send = tdgram_bsd_disconnect_send,
|
|
.disconnect_recv = tdgram_bsd_disconnect_recv,
|
|
};
|
|
|
|
static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
|
|
{
|
|
TALLOC_FREE(bsds->fde);
|
|
if (bsds->fd != -1) {
|
|
close(bsds->fd);
|
|
bsds->fd = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
|
|
const struct tsocket_address *remote,
|
|
bool broadcast,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tdgram_context **_dgram,
|
|
const char *location)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
struct samba_sockaddr *rbsda = NULL;
|
|
struct tdgram_context *dgram;
|
|
struct tdgram_bsd *bsds;
|
|
int fd;
|
|
int ret;
|
|
bool do_bind = false;
|
|
bool do_reuseaddr = false;
|
|
bool do_ipv6only = false;
|
|
bool is_inet = false;
|
|
int sa_fam = lbsda->u.sa.sa_family;
|
|
|
|
if (remote) {
|
|
rbsda = talloc_get_type_abort(remote->private_data,
|
|
struct samba_sockaddr);
|
|
}
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
if (broadcast) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (lbsda->u.un.sun_path[0] != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
break;
|
|
case AF_INET:
|
|
if (lbsda->u.in.sin_port != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
|
|
do_bind = true;
|
|
}
|
|
is_inet = true;
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
if (lbsda->u.in6.sin6_port != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
if (memcmp(&in6addr_any,
|
|
&lbsda->u.in6.sin6_addr,
|
|
sizeof(in6addr_any)) != 0) {
|
|
do_bind = true;
|
|
}
|
|
is_inet = true;
|
|
do_ipv6only = true;
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (!do_bind && is_inet && rbsda) {
|
|
sa_fam = rbsda->u.sa.sa_family;
|
|
switch (sa_fam) {
|
|
case AF_INET:
|
|
do_ipv6only = false;
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
do_ipv6only = true;
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
fd = socket(sa_fam, SOCK_DGRAM, 0);
|
|
if (fd < 0) {
|
|
return -1;
|
|
}
|
|
|
|
fd = tsocket_bsd_common_prepare_fd(fd, true);
|
|
if (fd < 0) {
|
|
return -1;
|
|
}
|
|
|
|
dgram = tdgram_context_create(mem_ctx,
|
|
&tdgram_bsd_ops,
|
|
&bsds,
|
|
struct tdgram_bsd,
|
|
location);
|
|
if (!dgram) {
|
|
int saved_errno = errno;
|
|
close(fd);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
ZERO_STRUCTP(bsds);
|
|
bsds->fd = fd;
|
|
talloc_set_destructor(bsds, tdgram_bsd_destructor);
|
|
|
|
#ifdef HAVE_IPV6
|
|
if (do_ipv6only) {
|
|
int val = 1;
|
|
|
|
ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
(const void *)&val, sizeof(val));
|
|
if (ret == -1) {
|
|
int saved_errno = errno;
|
|
talloc_free(dgram);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (broadcast) {
|
|
int val = 1;
|
|
|
|
ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
|
|
(const void *)&val, sizeof(val));
|
|
if (ret == -1) {
|
|
int saved_errno = errno;
|
|
talloc_free(dgram);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (do_reuseaddr) {
|
|
int val = 1;
|
|
|
|
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
|
|
(const void *)&val, sizeof(val));
|
|
if (ret == -1) {
|
|
int saved_errno = errno;
|
|
talloc_free(dgram);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (do_bind) {
|
|
ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
int saved_errno = errno;
|
|
talloc_free(dgram);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (rbsda) {
|
|
if (rbsda->u.sa.sa_family != sa_fam) {
|
|
talloc_free(dgram);
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
int saved_errno = errno;
|
|
talloc_free(dgram);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
*_dgram = dgram;
|
|
return 0;
|
|
}
|
|
|
|
int _tdgram_bsd_existing_socket(TALLOC_CTX *mem_ctx,
|
|
int fd,
|
|
struct tdgram_context **_dgram,
|
|
const char *location)
|
|
{
|
|
struct tdgram_context *dgram;
|
|
struct tdgram_bsd *bsds;
|
|
#ifdef HAVE_LINUX_RTNETLINK_H
|
|
int result;
|
|
struct sockaddr sa;
|
|
socklen_t sa_len = sizeof(struct sockaddr);
|
|
#endif
|
|
|
|
dgram = tdgram_context_create(mem_ctx,
|
|
&tdgram_bsd_ops,
|
|
&bsds,
|
|
struct tdgram_bsd,
|
|
location);
|
|
if (!dgram) {
|
|
return -1;
|
|
}
|
|
ZERO_STRUCTP(bsds);
|
|
bsds->fd = fd;
|
|
talloc_set_destructor(bsds, tdgram_bsd_destructor);
|
|
|
|
*_dgram = dgram;
|
|
|
|
#ifdef HAVE_LINUX_RTNETLINK_H
|
|
/*
|
|
* Try to determine the protocol family and remember if it's
|
|
* AF_NETLINK. We don't care if this fails.
|
|
*/
|
|
result = getsockname(fd, &sa, &sa_len);
|
|
if (result == 0 && sa.sa_family == AF_NETLINK) {
|
|
bsds->netlink = true;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int _tdgram_inet_udp_socket(const struct tsocket_address *local,
|
|
const struct tsocket_address *remote,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tdgram_context **dgram,
|
|
const char *location)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
int ret;
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
break;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ret = tdgram_bsd_dgram_socket(local, remote, false,
|
|
mem_ctx, dgram, location);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int _tdgram_inet_udp_broadcast_socket(const struct tsocket_address *local,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tdgram_context **dgram,
|
|
const char *location)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
int ret;
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
/* only ipv4 */
|
|
errno = EINVAL;
|
|
return -1;
|
|
#endif
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ret = tdgram_bsd_dgram_socket(local, NULL, true,
|
|
mem_ctx, dgram, location);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int _tdgram_unix_socket(const struct tsocket_address *local,
|
|
const struct tsocket_address *remote,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tdgram_context **dgram,
|
|
const char *location)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
int ret;
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
break;
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ret = tdgram_bsd_dgram_socket(local, remote, false,
|
|
mem_ctx, dgram, location);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct tstream_bsd {
|
|
int fd;
|
|
int error;
|
|
|
|
void *event_ptr;
|
|
struct tevent_fd *fde;
|
|
bool optimize_readv;
|
|
|
|
void *readable_private;
|
|
void (*readable_handler)(void *private_data);
|
|
void *writeable_private;
|
|
void (*writeable_handler)(void *private_data);
|
|
|
|
struct tevent_context *error_ctx;
|
|
struct tevent_timer *error_timer;
|
|
};
|
|
|
|
bool tstream_bsd_optimize_readv(struct tstream_context *stream,
|
|
bool on)
|
|
{
|
|
struct tstream_bsd *bsds =
|
|
talloc_get_type(_tstream_context_data(stream),
|
|
struct tstream_bsd);
|
|
bool old;
|
|
|
|
if (bsds == NULL) {
|
|
/* not a bsd socket */
|
|
return false;
|
|
}
|
|
|
|
old = bsds->optimize_readv;
|
|
bsds->optimize_readv = on;
|
|
|
|
return old;
|
|
}
|
|
|
|
static void tstream_bsd_error_timer(struct tevent_context *ev,
|
|
struct tevent_timer *te,
|
|
struct timeval current_time,
|
|
void *private_data)
|
|
{
|
|
struct tstream_bsd *bsds =
|
|
talloc_get_type(private_data,
|
|
struct tstream_bsd);
|
|
|
|
TALLOC_FREE(bsds->error_timer);
|
|
|
|
/*
|
|
* Turn on TEVENT_FD_READABLE() again
|
|
* if we have a writeable_handler that
|
|
* wants to monitor the connection
|
|
* for errors.
|
|
*/
|
|
if (bsds->writeable_handler != NULL) {
|
|
TEVENT_FD_READABLE(bsds->fde);
|
|
}
|
|
}
|
|
|
|
static void tstream_bsd_fde_handler(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
|
|
struct tstream_bsd);
|
|
|
|
if (flags & TEVENT_FD_WRITE) {
|
|
bsds->writeable_handler(bsds->writeable_private);
|
|
return;
|
|
}
|
|
if (flags & TEVENT_FD_READ) {
|
|
if (!bsds->readable_handler) {
|
|
struct timeval recheck_time;
|
|
|
|
/*
|
|
* In order to avoid cpu-spinning
|
|
* we no longer want to get TEVENT_FD_READ
|
|
*/
|
|
TEVENT_FD_NOT_READABLE(bsds->fde);
|
|
|
|
if (!bsds->writeable_handler) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If we have a writeable handler we
|
|
* want that to report connection errors
|
|
* early.
|
|
*
|
|
* So we check if the socket is in an
|
|
* error state.
|
|
*/
|
|
if (bsds->error == 0) {
|
|
int ret = tsocket_bsd_error(bsds->fd);
|
|
|
|
if (ret == -1) {
|
|
bsds->error = errno;
|
|
}
|
|
}
|
|
|
|
if (bsds->error != 0) {
|
|
/*
|
|
* Let the writeable handler report the error
|
|
*/
|
|
bsds->writeable_handler(bsds->writeable_private);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Here we called TEVENT_FD_NOT_READABLE() without
|
|
* calling into the writeable handler.
|
|
*
|
|
* So we may have to wait for the kernels tcp stack
|
|
* to report TEVENT_FD_WRITE in order to let
|
|
* make progress and turn on TEVENT_FD_READABLE()
|
|
* again.
|
|
*
|
|
* As a fallback we use a timer that turns on
|
|
* TEVENT_FD_READABLE() again after a timeout of
|
|
* 1 second.
|
|
*/
|
|
|
|
if (bsds->error_timer != NULL) {
|
|
return;
|
|
}
|
|
|
|
recheck_time = timeval_current_ofs(1, 0);
|
|
bsds->error_timer = tevent_add_timer(bsds->error_ctx,
|
|
bsds,
|
|
recheck_time,
|
|
tstream_bsd_error_timer,
|
|
bsds);
|
|
if (bsds->error_timer == NULL) {
|
|
bsds->error = ENOMEM;
|
|
/*
|
|
* Let the writeable handler report the error
|
|
*/
|
|
bsds->writeable_handler(bsds->writeable_private);
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
bsds->readable_handler(bsds->readable_private);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
|
|
struct tevent_context *ev,
|
|
void (*handler)(void *private_data),
|
|
void *private_data)
|
|
{
|
|
if (ev == NULL) {
|
|
if (handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (!bsds->readable_handler) {
|
|
return 0;
|
|
}
|
|
bsds->readable_handler = NULL;
|
|
bsds->readable_private = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* read and write must use the same tevent_context */
|
|
if (bsds->event_ptr != ev) {
|
|
if (bsds->readable_handler || bsds->writeable_handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
bsds->event_ptr = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
}
|
|
|
|
if (tevent_fd_get_flags(bsds->fde) == 0) {
|
|
TALLOC_FREE(bsds->fde);
|
|
|
|
bsds->fde = tevent_add_fd(ev, bsds,
|
|
bsds->fd, TEVENT_FD_READ,
|
|
tstream_bsd_fde_handler,
|
|
bsds);
|
|
if (!bsds->fde) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/* cache the event context we're running on */
|
|
bsds->event_ptr = ev;
|
|
} else if (!bsds->readable_handler) {
|
|
TEVENT_FD_READABLE(bsds->fde);
|
|
}
|
|
|
|
TALLOC_FREE(bsds->error_timer);
|
|
|
|
bsds->readable_handler = handler;
|
|
bsds->readable_private = private_data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
|
|
struct tevent_context *ev,
|
|
void (*handler)(void *private_data),
|
|
void *private_data)
|
|
{
|
|
if (ev == NULL) {
|
|
if (handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if (!bsds->writeable_handler) {
|
|
return 0;
|
|
}
|
|
bsds->writeable_handler = NULL;
|
|
bsds->writeable_private = NULL;
|
|
TEVENT_FD_NOT_WRITEABLE(bsds->fde);
|
|
TALLOC_FREE(bsds->error_timer);
|
|
bsds->error_ctx = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* read and write must use the same tevent_context */
|
|
if (bsds->event_ptr != ev) {
|
|
if (bsds->readable_handler || bsds->writeable_handler) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
bsds->event_ptr = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
TALLOC_FREE(bsds->error_timer);
|
|
bsds->error_ctx = NULL;
|
|
}
|
|
|
|
if (tevent_fd_get_flags(bsds->fde) == 0) {
|
|
TALLOC_FREE(bsds->fde);
|
|
|
|
bsds->fde = tevent_add_fd(ev, bsds,
|
|
bsds->fd,
|
|
TEVENT_FD_READ | TEVENT_FD_WRITE,
|
|
tstream_bsd_fde_handler,
|
|
bsds);
|
|
if (!bsds->fde) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/* cache the event context we're running on */
|
|
bsds->event_ptr = ev;
|
|
} else if (!bsds->writeable_handler) {
|
|
uint16_t flags = tevent_fd_get_flags(bsds->fde);
|
|
flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
|
|
tevent_fd_set_flags(bsds->fde, flags);
|
|
}
|
|
|
|
bsds->writeable_handler = handler;
|
|
bsds->writeable_private = private_data;
|
|
bsds->error_ctx = ev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
|
|
{
|
|
struct tstream_bsd *bsds = tstream_context_data(stream,
|
|
struct tstream_bsd);
|
|
ssize_t ret;
|
|
|
|
if (bsds->fd == -1) {
|
|
errno = ENOTCONN;
|
|
return -1;
|
|
}
|
|
|
|
if (bsds->error != 0) {
|
|
errno = bsds->error;
|
|
return -1;
|
|
}
|
|
|
|
ret = tsocket_bsd_pending(bsds->fd);
|
|
if (ret == -1) {
|
|
/*
|
|
* remember the error and don't
|
|
* allow further requests
|
|
*/
|
|
bsds->error = errno;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct tstream_bsd_readv_state {
|
|
struct tstream_context *stream;
|
|
|
|
struct iovec *vector;
|
|
size_t count;
|
|
|
|
int ret;
|
|
};
|
|
|
|
static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
|
|
{
|
|
struct tstream_bsd *bsds = tstream_context_data(state->stream,
|
|
struct tstream_bsd);
|
|
|
|
tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tstream_bsd_readv_handler(void *private_data);
|
|
|
|
static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tstream_context *stream,
|
|
struct iovec *vector,
|
|
size_t count)
|
|
{
|
|
struct tevent_req *req;
|
|
struct tstream_bsd_readv_state *state;
|
|
struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
|
|
int ret;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tstream_bsd_readv_state);
|
|
if (!req) {
|
|
return NULL;
|
|
}
|
|
|
|
state->stream = stream;
|
|
/* we make a copy of the vector so that we can modify it */
|
|
state->vector = talloc_array(state, struct iovec, count);
|
|
if (tevent_req_nomem(state->vector, req)) {
|
|
goto post;
|
|
}
|
|
memcpy(state->vector, vector, sizeof(struct iovec)*count);
|
|
state->count = count;
|
|
state->ret = 0;
|
|
|
|
talloc_set_destructor(state, tstream_bsd_readv_destructor);
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
/*
|
|
* this is a fast path, not waiting for the
|
|
* socket to become explicit readable gains
|
|
* about 10%-20% performance in benchmark tests.
|
|
*/
|
|
if (bsds->optimize_readv) {
|
|
/*
|
|
* We only do the optimization on
|
|
* readv if the caller asked for it.
|
|
*
|
|
* This is needed because in most cases
|
|
* we prefer to flush send buffers before
|
|
* receiving incoming requests.
|
|
*/
|
|
tstream_bsd_readv_handler(req);
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
goto post;
|
|
}
|
|
}
|
|
|
|
ret = tstream_bsd_set_readable_handler(bsds, ev,
|
|
tstream_bsd_readv_handler,
|
|
req);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
return req;
|
|
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static void tstream_bsd_readv_handler(void *private_data)
|
|
{
|
|
struct tevent_req *req = talloc_get_type_abort(private_data,
|
|
struct tevent_req);
|
|
struct tstream_bsd_readv_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_readv_state);
|
|
struct tstream_context *stream = state->stream;
|
|
struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
|
|
int ret;
|
|
int err;
|
|
int _count;
|
|
bool ok, retry;
|
|
|
|
if (bsds->error != 0) {
|
|
tevent_req_error(req, bsds->error);
|
|
return;
|
|
}
|
|
|
|
ret = readv(bsds->fd, state->vector, state->count);
|
|
if (ret == 0) {
|
|
/* propagate end of file */
|
|
bsds->error = EPIPE;
|
|
tevent_req_error(req, EPIPE);
|
|
return;
|
|
}
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/* retry later */
|
|
return;
|
|
}
|
|
if (err != 0) {
|
|
/*
|
|
* remember the error and don't
|
|
* allow further requests
|
|
*/
|
|
bsds->error = err;
|
|
}
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
state->ret += ret;
|
|
|
|
_count = state->count; /* tstream has size_t count, readv has int */
|
|
ok = iov_advance(&state->vector, &_count, ret);
|
|
state->count = _count;
|
|
|
|
if (!ok) {
|
|
tevent_req_error(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (state->count > 0) {
|
|
/* we have more to read */
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static int tstream_bsd_readv_recv(struct tevent_req *req,
|
|
int *perrno)
|
|
{
|
|
struct tstream_bsd_readv_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_readv_state);
|
|
int ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
if (ret == 0) {
|
|
ret = state->ret;
|
|
}
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
struct tstream_bsd_writev_state {
|
|
struct tstream_context *stream;
|
|
|
|
struct iovec *vector;
|
|
size_t count;
|
|
|
|
int ret;
|
|
};
|
|
|
|
static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
|
|
{
|
|
struct tstream_bsd *bsds = tstream_context_data(state->stream,
|
|
struct tstream_bsd);
|
|
|
|
tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tstream_bsd_writev_handler(void *private_data);
|
|
|
|
static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tstream_context *stream,
|
|
const struct iovec *vector,
|
|
size_t count)
|
|
{
|
|
struct tevent_req *req;
|
|
struct tstream_bsd_writev_state *state;
|
|
struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
|
|
int ret;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tstream_bsd_writev_state);
|
|
if (!req) {
|
|
return NULL;
|
|
}
|
|
|
|
state->stream = stream;
|
|
/* we make a copy of the vector so that we can modify it */
|
|
state->vector = talloc_array(state, struct iovec, count);
|
|
if (tevent_req_nomem(state->vector, req)) {
|
|
goto post;
|
|
}
|
|
memcpy(state->vector, vector, sizeof(struct iovec)*count);
|
|
state->count = count;
|
|
state->ret = 0;
|
|
|
|
talloc_set_destructor(state, tstream_bsd_writev_destructor);
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
/*
|
|
* this is a fast path, not waiting for the
|
|
* socket to become explicit writeable gains
|
|
* about 10%-20% performance in benchmark tests.
|
|
*/
|
|
tstream_bsd_writev_handler(req);
|
|
if (!tevent_req_is_in_progress(req)) {
|
|
goto post;
|
|
}
|
|
|
|
ret = tstream_bsd_set_writeable_handler(bsds, ev,
|
|
tstream_bsd_writev_handler,
|
|
req);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
return req;
|
|
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static void tstream_bsd_writev_handler(void *private_data)
|
|
{
|
|
struct tevent_req *req = talloc_get_type_abort(private_data,
|
|
struct tevent_req);
|
|
struct tstream_bsd_writev_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_writev_state);
|
|
struct tstream_context *stream = state->stream;
|
|
struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
|
|
ssize_t ret;
|
|
int err;
|
|
int _count;
|
|
bool ok, retry;
|
|
|
|
if (bsds->error != 0) {
|
|
tevent_req_error(req, bsds->error);
|
|
return;
|
|
}
|
|
|
|
ret = writev(bsds->fd, state->vector, state->count);
|
|
if (ret == 0) {
|
|
/* propagate end of file */
|
|
bsds->error = EPIPE;
|
|
tevent_req_error(req, EPIPE);
|
|
return;
|
|
}
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/*
|
|
* retry later...
|
|
*
|
|
* make sure we also wait readable again
|
|
* in order to notice errors early
|
|
*/
|
|
TEVENT_FD_READABLE(bsds->fde);
|
|
TALLOC_FREE(bsds->error_timer);
|
|
return;
|
|
}
|
|
if (err != 0) {
|
|
/*
|
|
* remember the error and don't
|
|
* allow further requests
|
|
*/
|
|
bsds->error = err;
|
|
}
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
state->ret += ret;
|
|
|
|
_count = state->count; /* tstream has size_t count, writev has int */
|
|
ok = iov_advance(&state->vector, &_count, ret);
|
|
state->count = _count;
|
|
|
|
if (!ok) {
|
|
tevent_req_error(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (state->count > 0) {
|
|
/*
|
|
* we have more to write
|
|
*
|
|
* make sure we also wait readable again
|
|
* in order to notice errors early
|
|
*/
|
|
TEVENT_FD_READABLE(bsds->fde);
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
|
|
{
|
|
struct tstream_bsd_writev_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_writev_state);
|
|
int ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
if (ret == 0) {
|
|
ret = state->ret;
|
|
}
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
struct tstream_bsd_disconnect_state {
|
|
void *__dummy;
|
|
};
|
|
|
|
static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct tstream_context *stream)
|
|
{
|
|
struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
|
|
struct tevent_req *req;
|
|
struct tstream_bsd_disconnect_state *state;
|
|
int ret;
|
|
int err;
|
|
bool dummy;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tstream_bsd_disconnect_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (bsds->fd == -1) {
|
|
tevent_req_error(req, ENOTCONN);
|
|
goto post;
|
|
}
|
|
|
|
TALLOC_FREE(bsds->error_timer);
|
|
bsds->error_ctx = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
ret = close(bsds->fd);
|
|
bsds->fd = -1;
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
|
|
if (tevent_req_error(req, err)) {
|
|
goto post;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static int tstream_bsd_disconnect_recv(struct tevent_req *req,
|
|
int *perrno)
|
|
{
|
|
int ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
static const struct tstream_context_ops tstream_bsd_ops = {
|
|
.name = "bsd",
|
|
|
|
.pending_bytes = tstream_bsd_pending_bytes,
|
|
|
|
.readv_send = tstream_bsd_readv_send,
|
|
.readv_recv = tstream_bsd_readv_recv,
|
|
|
|
.writev_send = tstream_bsd_writev_send,
|
|
.writev_recv = tstream_bsd_writev_recv,
|
|
|
|
.disconnect_send = tstream_bsd_disconnect_send,
|
|
.disconnect_recv = tstream_bsd_disconnect_recv,
|
|
};
|
|
|
|
static int tstream_bsd_destructor(struct tstream_bsd *bsds)
|
|
{
|
|
TALLOC_FREE(bsds->error_timer);
|
|
bsds->error_ctx = NULL;
|
|
TALLOC_FREE(bsds->fde);
|
|
if (bsds->fd != -1) {
|
|
close(bsds->fd);
|
|
bsds->fd = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
|
|
int fd,
|
|
struct tstream_context **_stream,
|
|
const char *location)
|
|
{
|
|
struct tstream_context *stream;
|
|
struct tstream_bsd *bsds;
|
|
|
|
stream = tstream_context_create(mem_ctx,
|
|
&tstream_bsd_ops,
|
|
&bsds,
|
|
struct tstream_bsd,
|
|
location);
|
|
if (!stream) {
|
|
return -1;
|
|
}
|
|
ZERO_STRUCTP(bsds);
|
|
bsds->fd = fd;
|
|
talloc_set_destructor(bsds, tstream_bsd_destructor);
|
|
|
|
*_stream = stream;
|
|
return 0;
|
|
}
|
|
|
|
struct tstream_bsd_connect_state {
|
|
int fd;
|
|
struct tevent_fd *fde;
|
|
struct tstream_conext *stream;
|
|
struct tsocket_address *local;
|
|
};
|
|
|
|
static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
|
|
{
|
|
TALLOC_FREE(state->fde);
|
|
if (state->fd != -1) {
|
|
close(state->fd);
|
|
state->fd = -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data);
|
|
|
|
static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
int sys_errno,
|
|
const struct tsocket_address *local,
|
|
const struct tsocket_address *remote)
|
|
{
|
|
struct tevent_req *req;
|
|
struct tstream_bsd_connect_state *state;
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
struct samba_sockaddr *lrbsda = NULL;
|
|
struct samba_sockaddr *rbsda =
|
|
talloc_get_type_abort(remote->private_data,
|
|
struct samba_sockaddr);
|
|
int ret;
|
|
bool do_bind = false;
|
|
bool do_reuseaddr = false;
|
|
bool do_ipv6only = false;
|
|
bool is_inet = false;
|
|
int sa_fam = lbsda->u.sa.sa_family;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct tstream_bsd_connect_state);
|
|
if (!req) {
|
|
return NULL;
|
|
}
|
|
state->fd = -1;
|
|
state->fde = NULL;
|
|
|
|
talloc_set_destructor(state, tstream_bsd_connect_destructor);
|
|
|
|
/* give the wrappers a chance to report an error */
|
|
if (sys_errno != 0) {
|
|
tevent_req_error(req, sys_errno);
|
|
goto post;
|
|
}
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
if (lbsda->u.un.sun_path[0] != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
break;
|
|
case AF_INET:
|
|
if (lbsda->u.in.sin_port != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
|
|
do_bind = true;
|
|
}
|
|
is_inet = true;
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
if (lbsda->u.in6.sin6_port != 0) {
|
|
do_reuseaddr = true;
|
|
do_bind = true;
|
|
}
|
|
if (memcmp(&in6addr_any,
|
|
&lbsda->u.in6.sin6_addr,
|
|
sizeof(in6addr_any)) != 0) {
|
|
do_bind = true;
|
|
}
|
|
is_inet = true;
|
|
do_ipv6only = true;
|
|
break;
|
|
#endif
|
|
default:
|
|
tevent_req_error(req, EINVAL);
|
|
goto post;
|
|
}
|
|
|
|
if (!do_bind && is_inet) {
|
|
sa_fam = rbsda->u.sa.sa_family;
|
|
switch (sa_fam) {
|
|
case AF_INET:
|
|
do_ipv6only = false;
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
do_ipv6only = true;
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (is_inet) {
|
|
state->local = tsocket_address_create(state,
|
|
&tsocket_address_bsd_ops,
|
|
&lrbsda,
|
|
struct samba_sockaddr,
|
|
__location__ "bsd_connect");
|
|
if (tevent_req_nomem(state->local, req)) {
|
|
goto post;
|
|
}
|
|
|
|
ZERO_STRUCTP(lrbsda);
|
|
lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
|
|
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
|
|
lrbsda->u.sa.sa_len = lrbsda->sa_socklen;
|
|
#endif
|
|
}
|
|
|
|
state->fd = socket(sa_fam, SOCK_STREAM, 0);
|
|
if (state->fd == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
|
|
if (state->fd == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
#ifdef HAVE_IPV6
|
|
if (do_ipv6only) {
|
|
int val = 1;
|
|
|
|
ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
(const void *)&val, sizeof(val));
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (do_reuseaddr) {
|
|
int val = 1;
|
|
|
|
ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
|
|
(const void *)&val, sizeof(val));
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
}
|
|
|
|
if (do_bind) {
|
|
ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
}
|
|
|
|
if (rbsda->u.sa.sa_family != sa_fam) {
|
|
tevent_req_error(req, EINVAL);
|
|
goto post;
|
|
}
|
|
|
|
ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
if (errno == EINPROGRESS) {
|
|
goto async;
|
|
}
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
|
|
if (!state->local) {
|
|
tevent_req_done(req);
|
|
goto post;
|
|
}
|
|
|
|
if (lrbsda != NULL) {
|
|
ret = getsockname(state->fd,
|
|
&lrbsda->u.sa,
|
|
&lrbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
goto post;
|
|
}
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
goto post;
|
|
|
|
async:
|
|
|
|
/*
|
|
* Note for historic reasons TEVENT_FD_WRITE is not enough
|
|
* to get notified for POLLERR or EPOLLHUP even if they
|
|
* come together with POLLOUT. That means we need to
|
|
* use TEVENT_FD_READ in addition until we have
|
|
* TEVENT_FD_ERROR.
|
|
*/
|
|
state->fde = tevent_add_fd(ev, state,
|
|
state->fd,
|
|
TEVENT_FD_READ | TEVENT_FD_WRITE,
|
|
tstream_bsd_connect_fde_handler,
|
|
req);
|
|
if (tevent_req_nomem(state->fde, req)) {
|
|
goto post;
|
|
}
|
|
|
|
return req;
|
|
|
|
post:
|
|
tevent_req_post(req, ev);
|
|
return req;
|
|
}
|
|
|
|
static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct tevent_req *req = talloc_get_type_abort(private_data,
|
|
struct tevent_req);
|
|
struct tstream_bsd_connect_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_connect_state);
|
|
struct samba_sockaddr *lrbsda = NULL;
|
|
int ret;
|
|
int error=0;
|
|
socklen_t len = sizeof(error);
|
|
int err;
|
|
bool retry;
|
|
|
|
ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
|
|
if (ret == 0) {
|
|
if (error != 0) {
|
|
errno = error;
|
|
ret = -1;
|
|
}
|
|
}
|
|
err = tsocket_bsd_error_from_errno(ret, errno, &retry);
|
|
if (retry) {
|
|
/* retry later */
|
|
return;
|
|
}
|
|
if (tevent_req_error(req, err)) {
|
|
return;
|
|
}
|
|
|
|
if (!state->local) {
|
|
tevent_req_done(req);
|
|
return;
|
|
}
|
|
|
|
lrbsda = talloc_get_type_abort(state->local->private_data,
|
|
struct samba_sockaddr);
|
|
|
|
ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
|
|
if (ret == -1) {
|
|
tevent_req_error(req, errno);
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static int tstream_bsd_connect_recv(struct tevent_req *req,
|
|
int *perrno,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tstream_context **stream,
|
|
struct tsocket_address **local,
|
|
const char *location)
|
|
{
|
|
struct tstream_bsd_connect_state *state = tevent_req_data(req,
|
|
struct tstream_bsd_connect_state);
|
|
int ret;
|
|
|
|
ret = tsocket_simple_int_recv(req, perrno);
|
|
if (ret == 0) {
|
|
ret = _tstream_bsd_existing_socket(mem_ctx,
|
|
state->fd,
|
|
stream,
|
|
location);
|
|
if (ret == -1) {
|
|
*perrno = errno;
|
|
goto done;
|
|
}
|
|
TALLOC_FREE(state->fde);
|
|
state->fd = -1;
|
|
|
|
if (local) {
|
|
*local = talloc_move(mem_ctx, &state->local);
|
|
}
|
|
}
|
|
|
|
done:
|
|
tevent_req_received(req);
|
|
return ret;
|
|
}
|
|
|
|
struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
const struct tsocket_address *local,
|
|
const struct tsocket_address *remote)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
struct tevent_req *req;
|
|
int sys_errno = 0;
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_INET:
|
|
break;
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6:
|
|
break;
|
|
#endif
|
|
default:
|
|
sys_errno = EINVAL;
|
|
break;
|
|
}
|
|
|
|
req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
|
|
|
|
return req;
|
|
}
|
|
|
|
int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
|
|
int *perrno,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tstream_context **stream,
|
|
struct tsocket_address **local,
|
|
const char *location)
|
|
{
|
|
return tstream_bsd_connect_recv(req, perrno,
|
|
mem_ctx, stream, local,
|
|
location);
|
|
}
|
|
|
|
struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
const struct tsocket_address *local,
|
|
const struct tsocket_address *remote)
|
|
{
|
|
struct samba_sockaddr *lbsda =
|
|
talloc_get_type_abort(local->private_data,
|
|
struct samba_sockaddr);
|
|
struct tevent_req *req;
|
|
int sys_errno = 0;
|
|
|
|
switch (lbsda->u.sa.sa_family) {
|
|
case AF_UNIX:
|
|
break;
|
|
default:
|
|
sys_errno = EINVAL;
|
|
break;
|
|
}
|
|
|
|
req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
|
|
|
|
return req;
|
|
}
|
|
|
|
int _tstream_unix_connect_recv(struct tevent_req *req,
|
|
int *perrno,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct tstream_context **stream,
|
|
const char *location)
|
|
{
|
|
return tstream_bsd_connect_recv(req, perrno,
|
|
mem_ctx, stream, NULL,
|
|
location);
|
|
}
|
|
|
|
int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
|
|
struct tstream_context **_stream1,
|
|
TALLOC_CTX *mem_ctx2,
|
|
struct tstream_context **_stream2,
|
|
const char *location)
|
|
{
|
|
int ret;
|
|
int fds[2];
|
|
int fd1;
|
|
int fd2;
|
|
struct tstream_context *stream1 = NULL;
|
|
struct tstream_context *stream2 = NULL;
|
|
|
|
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
|
|
if (ret == -1) {
|
|
return -1;
|
|
}
|
|
fd1 = fds[0];
|
|
fd2 = fds[1];
|
|
|
|
fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
|
|
if (fd1 == -1) {
|
|
int sys_errno = errno;
|
|
close(fd2);
|
|
errno = sys_errno;
|
|
return -1;
|
|
}
|
|
|
|
fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
|
|
if (fd2 == -1) {
|
|
int sys_errno = errno;
|
|
close(fd1);
|
|
errno = sys_errno;
|
|
return -1;
|
|
}
|
|
|
|
ret = _tstream_bsd_existing_socket(mem_ctx1,
|
|
fd1,
|
|
&stream1,
|
|
location);
|
|
if (ret == -1) {
|
|
int sys_errno = errno;
|
|
close(fd1);
|
|
close(fd2);
|
|
errno = sys_errno;
|
|
return -1;
|
|
}
|
|
|
|
ret = _tstream_bsd_existing_socket(mem_ctx2,
|
|
fd2,
|
|
&stream2,
|
|
location);
|
|
if (ret == -1) {
|
|
int sys_errno = errno;
|
|
talloc_free(stream1);
|
|
close(fd2);
|
|
errno = sys_errno;
|
|
return -1;
|
|
}
|
|
|
|
*_stream1 = stream1;
|
|
*_stream2 = stream2;
|
|
return 0;
|
|
}
|
|
|