diff options
Diffstat (limited to 'usr.sbin/ntpd/buffer.c')
| -rw-r--r-- | usr.sbin/ntpd/buffer.c | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/usr.sbin/ntpd/buffer.c b/usr.sbin/ntpd/buffer.c deleted file mode 100644 index cf0cfedb9e0..00000000000 --- a/usr.sbin/ntpd/buffer.c +++ /dev/null @@ -1,303 +0,0 @@ -/* $OpenBSD: buffer.c,v 1.13 2010/05/26 13:56:08 nicm Exp $ */ - -/* - * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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. - */ - -#include <sys/param.h> -#include <sys/queue.h> -#include <sys/socket.h> -#include <sys/uio.h> - -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "imsg.h" - -int ibuf_realloc(struct ibuf *, size_t); -void ibuf_enqueue(struct msgbuf *, struct ibuf *); -void ibuf_dequeue(struct msgbuf *, struct ibuf *); - -struct ibuf * -ibuf_open(size_t len) -{ - struct ibuf *buf; - - if ((buf = calloc(1, sizeof(struct ibuf))) == NULL) - return (NULL); - if ((buf->buf = malloc(len)) == NULL) { - free(buf); - return (NULL); - } - buf->size = buf->max = len; - buf->fd = -1; - - return (buf); -} - -struct ibuf * -ibuf_dynamic(size_t len, size_t max) -{ - struct ibuf *buf; - - if (max < len) - return (NULL); - - if ((buf = ibuf_open(len)) == NULL) - return (NULL); - - if (max > 0) - buf->max = max; - - return (buf); -} - -int -ibuf_realloc(struct ibuf *buf, size_t len) -{ - u_char *b; - - /* on static buffers max is eq size and so the following fails */ - if (buf->wpos + len > buf->max) { - errno = ENOMEM; - return (-1); - } - - b = realloc(buf->buf, buf->wpos + len); - if (b == NULL) - return (-1); - buf->buf = b; - buf->size = buf->wpos + len; - - return (0); -} - -int -ibuf_add(struct ibuf *buf, const void *data, size_t len) -{ - if (buf->wpos + len > buf->size) - if (ibuf_realloc(buf, len) == -1) - return (-1); - - memcpy(buf->buf + buf->wpos, data, len); - buf->wpos += len; - return (0); -} - -void * -ibuf_reserve(struct ibuf *buf, size_t len) -{ - void *b; - - if (buf->wpos + len > buf->size) - if (ibuf_realloc(buf, len) == -1) - return (NULL); - - b = buf->buf + buf->wpos; - buf->wpos += len; - return (b); -} - -void * -ibuf_seek(struct ibuf *buf, size_t pos, size_t len) -{ - /* only allowed to seek in already written parts */ - if (pos + len > buf->wpos) - return (NULL); - - return (buf->buf + pos); -} - -size_t -ibuf_size(struct ibuf *buf) -{ - return (buf->wpos); -} - -size_t -ibuf_left(struct ibuf *buf) -{ - return (buf->max - buf->wpos); -} - -void -ibuf_close(struct msgbuf *msgbuf, struct ibuf *buf) -{ - ibuf_enqueue(msgbuf, buf); -} - -int -ibuf_write(struct msgbuf *msgbuf) -{ - struct iovec iov[IOV_MAX]; - struct ibuf *buf; - unsigned int i = 0; - ssize_t n; - - bzero(&iov, sizeof(iov)); - TAILQ_FOREACH(buf, &msgbuf->bufs, entry) { - if (i >= IOV_MAX) - break; - iov[i].iov_base = buf->buf + buf->rpos; - iov[i].iov_len = buf->wpos - buf->rpos; - i++; - } - - if ((n = writev(msgbuf->fd, iov, i)) == -1) { - if (errno == EAGAIN || errno == ENOBUFS || - errno == EINTR) /* try later */ - return (0); - else - return (-1); - } - - if (n == 0) { /* connection closed */ - errno = 0; - return (-2); - } - - msgbuf_drain(msgbuf, n); - - return (0); -} - -void -ibuf_free(struct ibuf *buf) -{ - free(buf->buf); - free(buf); -} - -void -msgbuf_init(struct msgbuf *msgbuf) -{ - msgbuf->queued = 0; - msgbuf->fd = -1; - TAILQ_INIT(&msgbuf->bufs); -} - -void -msgbuf_drain(struct msgbuf *msgbuf, size_t n) -{ - struct ibuf *buf, *next; - - for (buf = TAILQ_FIRST(&msgbuf->bufs); buf != NULL && n > 0; - buf = next) { - next = TAILQ_NEXT(buf, entry); - if (buf->rpos + n >= buf->wpos) { - n -= buf->wpos - buf->rpos; - ibuf_dequeue(msgbuf, buf); - } else { - buf->rpos += n; - n = 0; - } - } -} - -void -msgbuf_clear(struct msgbuf *msgbuf) -{ - struct ibuf *buf; - - while ((buf = TAILQ_FIRST(&msgbuf->bufs)) != NULL) - ibuf_dequeue(msgbuf, buf); -} - -int -msgbuf_write(struct msgbuf *msgbuf) -{ - struct iovec iov[IOV_MAX]; - struct ibuf *buf; - unsigned int i = 0; - ssize_t n; - struct msghdr msg; - struct cmsghdr *cmsg; - union { - struct cmsghdr hdr; - char buf[CMSG_SPACE(sizeof(int))]; - } cmsgbuf; - - bzero(&iov, sizeof(iov)); - bzero(&msg, sizeof(msg)); - TAILQ_FOREACH(buf, &msgbuf->bufs, entry) { - if (i >= IOV_MAX) - break; - iov[i].iov_base = buf->buf + buf->rpos; - iov[i].iov_len = buf->wpos - buf->rpos; - i++; - if (buf->fd != -1) - break; - } - - msg.msg_iov = iov; - msg.msg_iovlen = i; - - if (buf != NULL && buf->fd != -1) { - msg.msg_control = (caddr_t)&cmsgbuf.buf; - msg.msg_controllen = sizeof(cmsgbuf.buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - *(int *)CMSG_DATA(cmsg) = buf->fd; - } - - if ((n = sendmsg(msgbuf->fd, &msg, 0)) == -1) { - if (errno == EAGAIN || errno == ENOBUFS || - errno == EINTR) /* try later */ - return (0); - else - return (-1); - } - - if (n == 0) { /* connection closed */ - errno = 0; - return (-2); - } - - /* - * assumption: fd got sent if sendmsg sent anything - * this works because fds are passed one at a time - */ - if (buf != NULL && buf->fd != -1) { - close(buf->fd); - buf->fd = -1; - } - - msgbuf_drain(msgbuf, n); - - return (0); -} - -void -ibuf_enqueue(struct msgbuf *msgbuf, struct ibuf *buf) -{ - TAILQ_INSERT_TAIL(&msgbuf->bufs, buf, entry); - msgbuf->queued++; -} - -void -ibuf_dequeue(struct msgbuf *msgbuf, struct ibuf *buf) -{ - TAILQ_REMOVE(&msgbuf->bufs, buf, entry); - - if (buf->fd != -1) - close(buf->fd); - - msgbuf->queued--; - ibuf_free(buf); -} |