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-rw-r--r--lib/libc/net/nscachedcli.c576
1 files changed, 0 insertions, 576 deletions
diff --git a/lib/libc/net/nscachedcli.c b/lib/libc/net/nscachedcli.c
deleted file mode 100644
index 1323805..0000000
--- a/lib/libc/net/nscachedcli.c
+++ /dev/null
@@ -1,576 +0,0 @@
-/*-
- * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include "namespace.h"
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/event.h>
-#include <sys/uio.h>
-#include <sys/un.h>
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "un-namespace.h"
-#include "nscachedcli.h"
-
-#define NS_DEFAULT_CACHED_IO_TIMEOUT 4
-
-static int safe_write(struct cached_connection_ *, const void *, size_t);
-static int safe_read(struct cached_connection_ *, void *, size_t);
-static int send_credentials(struct cached_connection_ *, int);
-
-/*
- * safe_write writes data to the specified connection and tries to do it in
- * the very safe manner. We ensure, that we can write to the socket with
- * kevent. If the data_size can't be sent in one piece, then it would be
- * splitted.
- */
-static int
-safe_write(struct cached_connection_ *connection, const void *data,
- size_t data_size)
-{
- struct kevent eventlist;
- int nevents;
- size_t result;
- ssize_t s_result;
- struct timespec timeout;
-
- if (data_size == 0)
- return (0);
-
- timeout.tv_sec = NS_DEFAULT_CACHED_IO_TIMEOUT;
- timeout.tv_nsec = 0;
- result = 0;
- do {
- nevents = _kevent(connection->write_queue, NULL, 0, &eventlist,
- 1, &timeout);
- if ((nevents == 1) && (eventlist.filter == EVFILT_WRITE)) {
- s_result = _write(connection->sockfd, data + result,
- eventlist.data < data_size - result ?
- eventlist.data : data_size - result);
- if (s_result == -1)
- return (-1);
- else
- result += s_result;
-
- if (eventlist.flags & EV_EOF)
- return (result < data_size ? -1 : 0);
- } else
- return (-1);
- } while (result < data_size);
-
- return (0);
-}
-
-/*
- * safe_read reads data from connection and tries to do it in the very safe
- * and stable way. It uses kevent to ensure, that the data are availabe for
- * reading. If the amount of data to be read is too large, then they would
- * be splitted.
- */
-static int
-safe_read(struct cached_connection_ *connection, void *data, size_t data_size)
-{
- struct kevent eventlist;
- size_t result;
- ssize_t s_result;
- struct timespec timeout;
- int nevents;
-
- if (data_size == 0)
- return (0);
-
- timeout.tv_sec = NS_DEFAULT_CACHED_IO_TIMEOUT;
- timeout.tv_nsec = 0;
- result = 0;
- do {
- nevents = _kevent(connection->read_queue, NULL, 0, &eventlist,
- 1, &timeout);
- if (nevents == 1 && eventlist.filter == EVFILT_READ) {
- s_result = _read(connection->sockfd, data + result,
- eventlist.data <= data_size - result ?
- eventlist.data : data_size - result);
- if (s_result == -1)
- return (-1);
- else
- result += s_result;
-
- if (eventlist.flags & EV_EOF)
- return (result < data_size ? -1 : 0);
- } else
- return (-1);
- } while (result < data_size);
-
- return (0);
-}
-
-/*
- * Sends the credentials information to the connection along with the
- * communication element type.
- */
-static int
-send_credentials(struct cached_connection_ *connection, int type)
-{
- struct kevent eventlist;
- int nevents;
- ssize_t result;
- int res;
-
- struct msghdr cred_hdr;
- struct iovec iov;
-
- struct {
- struct cmsghdr hdr;
- char cred[CMSG_SPACE(sizeof(struct cmsgcred))];
- } cmsg;
-
- memset(&cmsg, 0, sizeof(cmsg));
- cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(struct cmsgcred));
- cmsg.hdr.cmsg_level = SOL_SOCKET;
- cmsg.hdr.cmsg_type = SCM_CREDS;
-
- memset(&cred_hdr, 0, sizeof(struct msghdr));
- cred_hdr.msg_iov = &iov;
- cred_hdr.msg_iovlen = 1;
- cred_hdr.msg_control = (caddr_t)&cmsg;
- cred_hdr.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
-
- iov.iov_base = &type;
- iov.iov_len = sizeof(int);
-
- EV_SET(&eventlist, connection->sockfd, EVFILT_WRITE, EV_ADD,
- NOTE_LOWAT, sizeof(int), NULL);
- res = _kevent(connection->write_queue, &eventlist, 1, NULL, 0, NULL);
-
- nevents = _kevent(connection->write_queue, NULL, 0, &eventlist, 1,
- NULL);
- if (nevents == 1 && eventlist.filter == EVFILT_WRITE) {
- result = (_sendmsg(connection->sockfd, &cred_hdr, 0) == -1) ?
- -1 : 0;
- EV_SET(&eventlist, connection->sockfd, EVFILT_WRITE, EV_ADD,
- 0, 0, NULL);
- _kevent(connection->write_queue, &eventlist, 1, NULL, 0, NULL);
- return (result);
- } else
- return (-1);
-}
-
-/*
- * Opens the connection with the specified params. Initializes all kqueues.
- */
-struct cached_connection_ *
-__open_cached_connection(struct cached_connection_params const *params)
-{
- struct cached_connection_ *retval;
- struct kevent eventlist;
- struct sockaddr_un client_address;
- int client_address_len, client_socket;
- int res;
-
- assert(params != NULL);
-
- client_socket = _socket(PF_LOCAL, SOCK_STREAM, 0);
- client_address.sun_family = PF_LOCAL;
- strncpy(client_address.sun_path, params->socket_path,
- sizeof(client_address.sun_path));
- client_address_len = sizeof(client_address.sun_family) +
- strlen(client_address.sun_path) + 1;
-
- res = _connect(client_socket, (struct sockaddr *)&client_address,
- client_address_len);
- if (res == -1) {
- _close(client_socket);
- return (NULL);
- }
- _fcntl(client_socket, F_SETFL, O_NONBLOCK);
-
- retval = malloc(sizeof(struct cached_connection_));
- assert(retval != NULL);
- memset(retval, 0, sizeof(struct cached_connection_));
-
- retval->sockfd = client_socket;
-
- retval->write_queue = kqueue();
- assert(retval->write_queue != -1);
-
- EV_SET(&eventlist, retval->sockfd, EVFILT_WRITE, EV_ADD, 0, 0, NULL);
- res = _kevent(retval->write_queue, &eventlist, 1, NULL, 0, NULL);
-
- retval->read_queue = kqueue();
- assert(retval->read_queue != -1);
-
- EV_SET(&eventlist, retval->sockfd, EVFILT_READ, EV_ADD, 0, 0, NULL);
- res = _kevent(retval->read_queue, &eventlist, 1, NULL, 0, NULL);
-
- return (retval);
-}
-
-void
-__close_cached_connection(struct cached_connection_ *connection)
-{
- assert(connection != NULL);
-
- _close(connection->sockfd);
- _close(connection->read_queue);
- _close(connection->write_queue);
- free(connection);
-}
-
-/*
- * This function is very close to the cache_write function of the caching
- * library, which is used in the caching daemon. It caches the data with the
- * specified key in the cache entry with entry_name.
- */
-int
-__cached_write(struct cached_connection_ *connection, const char *entry_name,
- const char *key, size_t key_size, const char *data, size_t data_size)
-{
- size_t name_size;
- int error_code;
- int result;
-
- error_code = -1;
- result = 0;
- result = send_credentials(connection, CET_WRITE_REQUEST);
- if (result != 0)
- goto fin;
-
- name_size = strlen(entry_name);
- result = safe_write(connection, &name_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, &key_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, &data_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, entry_name, name_size);
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, key, key_size);
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, data, data_size);
- if (result != 0)
- goto fin;
-
- result = safe_read(connection, &error_code, sizeof(int));
- if (result != 0)
- error_code = -1;
-
-fin:
- return (error_code);
-}
-
-/*
- * This function is very close to the cache_read function of the caching
- * library, which is used in the caching daemon. It reads cached data with the
- * specified key from the cache entry with entry_name.
- */
-int
-__cached_read(struct cached_connection_ *connection, const char *entry_name,
- const char *key, size_t key_size, char *data, size_t *data_size)
-{
- size_t name_size, result_size;
- int error_code, rec_error_code;
- int result;
-
- assert(connection != NULL);
- result = 0;
- error_code = -1;
-
- result = send_credentials(connection, CET_READ_REQUEST);
- if (result != 0)
- goto fin;
-
- name_size = strlen(entry_name);
- result = safe_write(connection, &name_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, &key_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, entry_name, name_size);
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, key, key_size);
- if (result != 0)
- goto fin;
-
- result = safe_read(connection, &rec_error_code, sizeof(int));
- if (result != 0)
- goto fin;
-
- if (rec_error_code != 0) {
- error_code = rec_error_code;
- goto fin;
- }
-
- result = safe_read(connection, &result_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- if (result_size > *data_size) {
- *data_size = result_size;
- error_code = -2;
- goto fin;
- }
-
- result = safe_read(connection, data, result_size);
- if (result != 0)
- goto fin;
-
- *data_size = result_size;
- error_code = 0;
-
-fin:
- return (error_code);
-}
-
-/*
- * Initializes the mp_write_session. For such a session the new connection
- * would be opened. The data should be written to the session with
- * __cached_mp_write function. The __close_cached_mp_write_session function
- * should be used to submit session and __abandon_cached_mp_write_session - to
- * abandon it. When the session is submitted, the whole se
- */
-struct cached_connection_ *
-__open_cached_mp_write_session(struct cached_connection_params const *params,
- const char *entry_name)
-{
- struct cached_connection_ *connection, *retval;
- size_t name_size;
- int error_code;
- int result;
-
- retval = NULL;
- connection = __open_cached_connection(params);
- if (connection == NULL)
- return (NULL);
- connection->mp_flag = 1;
-
- result = send_credentials(connection, CET_MP_WRITE_SESSION_REQUEST);
- if (result != 0)
- goto fin;
-
- name_size = strlen(entry_name);
- result = safe_write(connection, &name_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, entry_name, name_size);
- if (result != 0)
- goto fin;
-
- result = safe_read(connection, &error_code, sizeof(int));
- if (result != 0)
- goto fin;
-
- if (error_code != 0)
- result = error_code;
-
-fin:
- if (result != 0)
- __close_cached_connection(connection);
- else
- retval = connection;
- return (retval);
-}
-
-/*
- * Adds new portion of data to the opened write session
- */
-int
-__cached_mp_write(struct cached_connection_ *ws, const char *data,
- size_t data_size)
-{
- int request, result;
- int error_code;
-
- error_code = -1;
-
- request = CET_MP_WRITE_SESSION_WRITE_REQUEST;
- result = safe_write(ws, &request, sizeof(int));
- if (result != 0)
- goto fin;
-
- result = safe_write(ws, &data_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(ws, data, data_size);
- if (result != 0)
- goto fin;
-
- result = safe_read(ws, &error_code, sizeof(int));
- if (result != 0)
- error_code = -1;
-
-fin:
- return (error_code);
-}
-
-/*
- * Abandons all operations with the write session. All data, that were written
- * to the session before, are discarded.
- */
-int
-__abandon_cached_mp_write_session(struct cached_connection_ *ws)
-{
- int notification;
- int result;
-
- notification = CET_MP_WRITE_SESSION_ABANDON_NOTIFICATION;
- result = safe_write(ws, &notification, sizeof(int));
- __close_cached_connection(ws);
- return (result);
-}
-
-/*
- * Gracefully closes the write session. The data, that were previously written
- * to the session, are committed.
- */
-int
-__close_cached_mp_write_session(struct cached_connection_ *ws)
-{
- int notification;
- int result;
-
- notification = CET_MP_WRITE_SESSION_CLOSE_NOTIFICATION;
- result = safe_write(ws, &notification, sizeof(int));
- __close_cached_connection(ws);
- return (0);
-}
-
-struct cached_connection_ *
-__open_cached_mp_read_session(struct cached_connection_params const *params,
- const char *entry_name)
-{
- struct cached_connection_ *connection, *retval;
- size_t name_size;
- int error_code;
- int result;
-
- retval = NULL;
- connection = __open_cached_connection(params);
- if (connection == NULL)
- return (NULL);
- connection->mp_flag = 1;
-
- result = send_credentials(connection, CET_MP_READ_SESSION_REQUEST);
- if (result != 0)
- goto fin;
-
- name_size = strlen(entry_name);
- result = safe_write(connection, &name_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- result = safe_write(connection, entry_name, name_size);
- if (result != 0)
- goto fin;
-
- result = safe_read(connection, &error_code, sizeof(int));
- if (result != 0)
- goto fin;
-
- if (error_code != 0)
- result = error_code;
-
-fin:
- if (result != 0)
- __close_cached_connection(connection);
- else
- retval = connection;
- return (retval);
-}
-
-int
-__cached_mp_read(struct cached_connection_ *rs, char *data, size_t *data_size)
-{
- size_t result_size;
- int error_code, rec_error_code;
- int request, result;
-
- error_code = -1;
- request = CET_MP_READ_SESSION_READ_REQUEST;
- result = safe_write(rs, &request, sizeof(int));
- if (result != 0)
- goto fin;
-
- result = safe_read(rs, &rec_error_code, sizeof(int));
- if (result != 0)
- goto fin;
-
- if (rec_error_code != 0) {
- error_code = rec_error_code;
- goto fin;
- }
-
- result = safe_read(rs, &result_size, sizeof(size_t));
- if (result != 0)
- goto fin;
-
- if (result_size > *data_size) {
- *data_size = result_size;
- error_code = -2;
- goto fin;
- }
-
- result = safe_read(rs, data, result_size);
- if (result != 0)
- goto fin;
-
- *data_size = result_size;
- error_code = 0;
-
-fin:
- return (error_code);
-}
-
-int
-__close_cached_mp_read_session(struct cached_connection_ *rs)
-{
-
- __close_cached_connection(rs);
- return (0);
-}
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