Reviewed by: des MFC after: 2 weeks Sponsored by: Chalmers University of Technology Differential Revision: https://reviews.freebsd.org/D17452
1284 lines
36 KiB
C
1284 lines
36 KiB
C
/*-
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* Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/event.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <assert.h>
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#include <errno.h>
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#include <nsswitch.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "config.h"
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#include "debug.h"
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#include "query.h"
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#include "log.h"
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#include "mp_ws_query.h"
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#include "mp_rs_query.h"
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#include "singletons.h"
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static const char negative_data[1] = { 0 };
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extern void get_time_func(struct timeval *);
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static void clear_config_entry(struct configuration_entry *);
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static void clear_config_entry_part(struct configuration_entry *,
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const char *, size_t);
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static int on_query_startup(struct query_state *);
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static void on_query_destroy(struct query_state *);
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static int on_read_request_read1(struct query_state *);
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static int on_read_request_read2(struct query_state *);
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static int on_read_request_process(struct query_state *);
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static int on_read_response_write1(struct query_state *);
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static int on_read_response_write2(struct query_state *);
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static int on_rw_mapper(struct query_state *);
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static int on_transform_request_read1(struct query_state *);
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static int on_transform_request_read2(struct query_state *);
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static int on_transform_request_process(struct query_state *);
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static int on_transform_response_write1(struct query_state *);
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static int on_write_request_read1(struct query_state *);
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static int on_write_request_read2(struct query_state *);
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static int on_negative_write_request_process(struct query_state *);
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static int on_write_request_process(struct query_state *);
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static int on_write_response_write1(struct query_state *);
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/*
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* Clears the specified configuration entry (clears the cache for positive and
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* and negative entries) and also for all multipart entries.
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*/
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static void
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clear_config_entry(struct configuration_entry *config_entry)
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{
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size_t i;
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TRACE_IN(clear_config_entry);
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configuration_lock_entry(config_entry, CELT_POSITIVE);
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if (config_entry->positive_cache_entry != NULL)
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transform_cache_entry(
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config_entry->positive_cache_entry,
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CTT_CLEAR);
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configuration_unlock_entry(config_entry, CELT_POSITIVE);
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configuration_lock_entry(config_entry, CELT_NEGATIVE);
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if (config_entry->negative_cache_entry != NULL)
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transform_cache_entry(
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config_entry->negative_cache_entry,
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CTT_CLEAR);
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configuration_unlock_entry(config_entry, CELT_NEGATIVE);
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configuration_lock_entry(config_entry, CELT_MULTIPART);
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for (i = 0; i < config_entry->mp_cache_entries_size; ++i)
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transform_cache_entry(
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config_entry->mp_cache_entries[i],
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CTT_CLEAR);
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configuration_unlock_entry(config_entry, CELT_MULTIPART);
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TRACE_OUT(clear_config_entry);
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}
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/*
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* Clears the specified configuration entry by deleting only the elements,
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* that are owned by the user with specified eid_str.
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*/
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static void
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clear_config_entry_part(struct configuration_entry *config_entry,
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const char *eid_str, size_t eid_str_length)
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{
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cache_entry *start, *finish, *mp_entry;
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TRACE_IN(clear_config_entry_part);
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configuration_lock_entry(config_entry, CELT_POSITIVE);
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if (config_entry->positive_cache_entry != NULL)
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transform_cache_entry_part(
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config_entry->positive_cache_entry,
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CTT_CLEAR, eid_str, eid_str_length, KPPT_LEFT);
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configuration_unlock_entry(config_entry, CELT_POSITIVE);
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configuration_lock_entry(config_entry, CELT_NEGATIVE);
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if (config_entry->negative_cache_entry != NULL)
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transform_cache_entry_part(
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config_entry->negative_cache_entry,
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CTT_CLEAR, eid_str, eid_str_length, KPPT_LEFT);
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configuration_unlock_entry(config_entry, CELT_NEGATIVE);
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configuration_lock_entry(config_entry, CELT_MULTIPART);
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if (configuration_entry_find_mp_cache_entries(config_entry,
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eid_str, &start, &finish) == 0) {
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for (mp_entry = start; mp_entry != finish; ++mp_entry)
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transform_cache_entry(*mp_entry, CTT_CLEAR);
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}
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configuration_unlock_entry(config_entry, CELT_MULTIPART);
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TRACE_OUT(clear_config_entry_part);
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}
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/*
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* This function is assigned to the query_state structue on its creation.
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* It's main purpose is to receive credentials from the client.
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*/
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static int
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on_query_startup(struct query_state *qstate)
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{
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struct msghdr cred_hdr;
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struct iovec iov;
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struct cmsgcred *cred;
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int elem_type;
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union {
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struct cmsghdr hdr;
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char cred[CMSG_SPACE(sizeof(struct cmsgcred))];
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} cmsg;
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TRACE_IN(on_query_startup);
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assert(qstate != NULL);
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memset(&cred_hdr, 0, sizeof(struct msghdr));
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cred_hdr.msg_iov = &iov;
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cred_hdr.msg_iovlen = 1;
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cred_hdr.msg_control = &cmsg;
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cred_hdr.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
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memset(&iov, 0, sizeof(struct iovec));
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iov.iov_base = &elem_type;
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iov.iov_len = sizeof(int);
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if (recvmsg(qstate->sockfd, &cred_hdr, 0) == -1) {
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TRACE_OUT(on_query_startup);
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return (-1);
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}
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if (cred_hdr.msg_controllen < CMSG_LEN(sizeof(struct cmsgcred))
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|| cmsg.hdr.cmsg_len < CMSG_LEN(sizeof(struct cmsgcred))
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|| cmsg.hdr.cmsg_level != SOL_SOCKET
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|| cmsg.hdr.cmsg_type != SCM_CREDS) {
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TRACE_OUT(on_query_startup);
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return (-1);
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}
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cred = (struct cmsgcred *)CMSG_DATA(&cmsg);
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qstate->uid = cred->cmcred_uid;
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qstate->gid = cred->cmcred_gid;
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#if defined(NS_NSCD_EID_CHECKING) || defined(NS_STRICT_NSCD_EID_CHECKING)
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/*
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* This check is probably a bit redundant - per-user cache is always separated
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* by the euid/egid pair
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*/
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if (check_query_eids(qstate) != 0) {
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#ifdef NS_STRICT_NSCD_EID_CHECKING
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TRACE_OUT(on_query_startup);
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return (-1);
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#else
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if ((elem_type != CET_READ_REQUEST) &&
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(elem_type != CET_MP_READ_SESSION_REQUEST) &&
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(elem_type != CET_WRITE_REQUEST) &&
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(elem_type != CET_MP_WRITE_SESSION_REQUEST)) {
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TRACE_OUT(on_query_startup);
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return (-1);
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}
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#endif
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}
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#endif
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switch (elem_type) {
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case CET_WRITE_REQUEST:
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qstate->process_func = on_write_request_read1;
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break;
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case CET_READ_REQUEST:
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qstate->process_func = on_read_request_read1;
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break;
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case CET_TRANSFORM_REQUEST:
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qstate->process_func = on_transform_request_read1;
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break;
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case CET_MP_WRITE_SESSION_REQUEST:
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qstate->process_func = on_mp_write_session_request_read1;
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break;
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case CET_MP_READ_SESSION_REQUEST:
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qstate->process_func = on_mp_read_session_request_read1;
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break;
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default:
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TRACE_OUT(on_query_startup);
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return (-1);
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}
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qstate->kevent_watermark = 0;
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TRACE_OUT(on_query_startup);
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return (0);
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}
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/*
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* on_rw_mapper is used to process multiple read/write requests during
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* one connection session. It's never called in the beginning (on query_state
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* creation) as it does not process the multipart requests and does not
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* receive credentials
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*/
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static int
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on_rw_mapper(struct query_state *qstate)
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{
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ssize_t result;
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int elem_type;
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TRACE_IN(on_rw_mapper);
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if (qstate->kevent_watermark == 0) {
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qstate->kevent_watermark = sizeof(int);
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} else {
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result = qstate->read_func(qstate, &elem_type, sizeof(int));
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if (result != sizeof(int)) {
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TRACE_OUT(on_rw_mapper);
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return (-1);
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}
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switch (elem_type) {
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case CET_WRITE_REQUEST:
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qstate->kevent_watermark = sizeof(size_t);
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qstate->process_func = on_write_request_read1;
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break;
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case CET_READ_REQUEST:
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qstate->kevent_watermark = sizeof(size_t);
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qstate->process_func = on_read_request_read1;
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break;
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default:
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TRACE_OUT(on_rw_mapper);
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return (-1);
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break;
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}
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}
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TRACE_OUT(on_rw_mapper);
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return (0);
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}
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/*
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* The default query_destroy function
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*/
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static void
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on_query_destroy(struct query_state *qstate)
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{
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TRACE_IN(on_query_destroy);
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finalize_comm_element(&qstate->response);
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finalize_comm_element(&qstate->request);
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TRACE_OUT(on_query_destroy);
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}
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/*
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* The functions below are used to process write requests.
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* - on_write_request_read1 and on_write_request_read2 read the request itself
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* - on_write_request_process processes it (if the client requests to
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* cache the negative result, the on_negative_write_request_process is used)
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* - on_write_response_write1 sends the response
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*/
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static int
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on_write_request_read1(struct query_state *qstate)
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{
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struct cache_write_request *write_request;
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ssize_t result;
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TRACE_IN(on_write_request_read1);
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if (qstate->kevent_watermark == 0)
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qstate->kevent_watermark = sizeof(size_t) * 3;
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else {
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init_comm_element(&qstate->request, CET_WRITE_REQUEST);
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write_request = get_cache_write_request(&qstate->request);
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result = qstate->read_func(qstate, &write_request->entry_length,
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sizeof(size_t));
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result += qstate->read_func(qstate,
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&write_request->cache_key_size, sizeof(size_t));
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result += qstate->read_func(qstate,
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&write_request->data_size, sizeof(size_t));
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if (result != sizeof(size_t) * 3) {
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TRACE_OUT(on_write_request_read1);
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return (-1);
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}
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if (BUFSIZE_INVALID(write_request->entry_length) ||
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BUFSIZE_INVALID(write_request->cache_key_size) ||
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(BUFSIZE_INVALID(write_request->data_size) &&
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(write_request->data_size != 0))) {
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TRACE_OUT(on_write_request_read1);
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return (-1);
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}
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write_request->entry = calloc(1,
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write_request->entry_length + 1);
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assert(write_request->entry != NULL);
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write_request->cache_key = calloc(1,
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write_request->cache_key_size +
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qstate->eid_str_length);
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assert(write_request->cache_key != NULL);
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memcpy(write_request->cache_key, qstate->eid_str,
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qstate->eid_str_length);
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if (write_request->data_size != 0) {
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write_request->data = calloc(1,
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write_request->data_size);
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assert(write_request->data != NULL);
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}
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qstate->kevent_watermark = write_request->entry_length +
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write_request->cache_key_size +
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write_request->data_size;
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qstate->process_func = on_write_request_read2;
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}
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TRACE_OUT(on_write_request_read1);
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return (0);
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}
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static int
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on_write_request_read2(struct query_state *qstate)
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{
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struct cache_write_request *write_request;
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ssize_t result;
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TRACE_IN(on_write_request_read2);
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write_request = get_cache_write_request(&qstate->request);
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result = qstate->read_func(qstate, write_request->entry,
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write_request->entry_length);
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result += qstate->read_func(qstate, write_request->cache_key +
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qstate->eid_str_length, write_request->cache_key_size);
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if (write_request->data_size != 0)
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result += qstate->read_func(qstate, write_request->data,
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write_request->data_size);
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if (result != (ssize_t)qstate->kevent_watermark) {
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TRACE_OUT(on_write_request_read2);
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return (-1);
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}
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write_request->cache_key_size += qstate->eid_str_length;
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qstate->kevent_watermark = 0;
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if (write_request->data_size != 0)
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qstate->process_func = on_write_request_process;
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else
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qstate->process_func = on_negative_write_request_process;
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TRACE_OUT(on_write_request_read2);
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return (0);
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}
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|
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static int
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on_write_request_process(struct query_state *qstate)
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{
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struct cache_write_request *write_request;
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struct cache_write_response *write_response;
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cache_entry c_entry;
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TRACE_IN(on_write_request_process);
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init_comm_element(&qstate->response, CET_WRITE_RESPONSE);
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write_response = get_cache_write_response(&qstate->response);
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write_request = get_cache_write_request(&qstate->request);
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qstate->config_entry = configuration_find_entry(
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s_configuration, write_request->entry);
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if (qstate->config_entry == NULL) {
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write_response->error_code = ENOENT;
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LOG_ERR_2("write_request", "can't find configuration"
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" entry '%s'. aborting request", write_request->entry);
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goto fin;
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}
|
|
|
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if (qstate->config_entry->enabled == 0) {
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write_response->error_code = EACCES;
|
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|
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LOG_ERR_2("write_request",
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"configuration entry '%s' is disabled",
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write_request->entry);
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goto fin;
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}
|
|
|
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if (qstate->config_entry->perform_actual_lookups != 0) {
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write_response->error_code = EOPNOTSUPP;
|
|
|
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LOG_ERR_2("write_request",
|
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"entry '%s' performs lookups by itself: "
|
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"can't write to it", write_request->entry);
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goto fin;
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}
|
|
|
|
configuration_lock_rdlock(s_configuration);
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c_entry = find_cache_entry(s_cache,
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qstate->config_entry->positive_cache_params.cep.entry_name);
|
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configuration_unlock(s_configuration);
|
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if (c_entry != NULL) {
|
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configuration_lock_entry(qstate->config_entry, CELT_POSITIVE);
|
|
qstate->config_entry->positive_cache_entry = c_entry;
|
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write_response->error_code = cache_write(c_entry,
|
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write_request->cache_key,
|
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write_request->cache_key_size,
|
|
write_request->data,
|
|
write_request->data_size);
|
|
configuration_unlock_entry(qstate->config_entry, CELT_POSITIVE);
|
|
|
|
if ((qstate->config_entry->common_query_timeout.tv_sec != 0) ||
|
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(qstate->config_entry->common_query_timeout.tv_usec != 0))
|
|
memcpy(&qstate->timeout,
|
|
&qstate->config_entry->common_query_timeout,
|
|
sizeof(struct timeval));
|
|
|
|
} else
|
|
write_response->error_code = -1;
|
|
|
|
fin:
|
|
qstate->kevent_filter = EVFILT_WRITE;
|
|
qstate->kevent_watermark = sizeof(int);
|
|
qstate->process_func = on_write_response_write1;
|
|
|
|
TRACE_OUT(on_write_request_process);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_negative_write_request_process(struct query_state *qstate)
|
|
{
|
|
struct cache_write_request *write_request;
|
|
struct cache_write_response *write_response;
|
|
cache_entry c_entry;
|
|
|
|
TRACE_IN(on_negative_write_request_process);
|
|
init_comm_element(&qstate->response, CET_WRITE_RESPONSE);
|
|
write_response = get_cache_write_response(&qstate->response);
|
|
write_request = get_cache_write_request(&qstate->request);
|
|
|
|
qstate->config_entry = configuration_find_entry (
|
|
s_configuration, write_request->entry);
|
|
|
|
if (qstate->config_entry == NULL) {
|
|
write_response->error_code = ENOENT;
|
|
|
|
LOG_ERR_2("negative_write_request",
|
|
"can't find configuration"
|
|
" entry '%s'. aborting request", write_request->entry);
|
|
goto fin;
|
|
}
|
|
|
|
if (qstate->config_entry->enabled == 0) {
|
|
write_response->error_code = EACCES;
|
|
|
|
LOG_ERR_2("negative_write_request",
|
|
"configuration entry '%s' is disabled",
|
|
write_request->entry);
|
|
goto fin;
|
|
}
|
|
|
|
if (qstate->config_entry->perform_actual_lookups != 0) {
|
|
write_response->error_code = EOPNOTSUPP;
|
|
|
|
LOG_ERR_2("negative_write_request",
|
|
"entry '%s' performs lookups by itself: "
|
|
"can't write to it", write_request->entry);
|
|
goto fin;
|
|
} else {
|
|
#ifdef NS_NSCD_EID_CHECKING
|
|
if (check_query_eids(qstate) != 0) {
|
|
write_response->error_code = EPERM;
|
|
goto fin;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
configuration_lock_rdlock(s_configuration);
|
|
c_entry = find_cache_entry(s_cache,
|
|
qstate->config_entry->negative_cache_params.cep.entry_name);
|
|
configuration_unlock(s_configuration);
|
|
if (c_entry != NULL) {
|
|
configuration_lock_entry(qstate->config_entry, CELT_NEGATIVE);
|
|
qstate->config_entry->negative_cache_entry = c_entry;
|
|
write_response->error_code = cache_write(c_entry,
|
|
write_request->cache_key,
|
|
write_request->cache_key_size,
|
|
negative_data,
|
|
sizeof(negative_data));
|
|
configuration_unlock_entry(qstate->config_entry, CELT_NEGATIVE);
|
|
|
|
if ((qstate->config_entry->common_query_timeout.tv_sec != 0) ||
|
|
(qstate->config_entry->common_query_timeout.tv_usec != 0))
|
|
memcpy(&qstate->timeout,
|
|
&qstate->config_entry->common_query_timeout,
|
|
sizeof(struct timeval));
|
|
} else
|
|
write_response->error_code = -1;
|
|
|
|
fin:
|
|
qstate->kevent_filter = EVFILT_WRITE;
|
|
qstate->kevent_watermark = sizeof(int);
|
|
qstate->process_func = on_write_response_write1;
|
|
|
|
TRACE_OUT(on_negative_write_request_process);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_write_response_write1(struct query_state *qstate)
|
|
{
|
|
struct cache_write_response *write_response;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_write_response_write1);
|
|
write_response = get_cache_write_response(&qstate->response);
|
|
result = qstate->write_func(qstate, &write_response->error_code,
|
|
sizeof(int));
|
|
if (result != sizeof(int)) {
|
|
TRACE_OUT(on_write_response_write1);
|
|
return (-1);
|
|
}
|
|
|
|
finalize_comm_element(&qstate->request);
|
|
finalize_comm_element(&qstate->response);
|
|
|
|
qstate->kevent_watermark = sizeof(int);
|
|
qstate->kevent_filter = EVFILT_READ;
|
|
qstate->process_func = on_rw_mapper;
|
|
|
|
TRACE_OUT(on_write_response_write1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The functions below are used to process read requests.
|
|
* - on_read_request_read1 and on_read_request_read2 read the request itself
|
|
* - on_read_request_process processes it
|
|
* - on_read_response_write1 and on_read_response_write2 send the response
|
|
*/
|
|
static int
|
|
on_read_request_read1(struct query_state *qstate)
|
|
{
|
|
struct cache_read_request *read_request;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_read_request_read1);
|
|
if (qstate->kevent_watermark == 0)
|
|
qstate->kevent_watermark = sizeof(size_t) * 2;
|
|
else {
|
|
init_comm_element(&qstate->request, CET_READ_REQUEST);
|
|
read_request = get_cache_read_request(&qstate->request);
|
|
|
|
result = qstate->read_func(qstate,
|
|
&read_request->entry_length, sizeof(size_t));
|
|
result += qstate->read_func(qstate,
|
|
&read_request->cache_key_size, sizeof(size_t));
|
|
|
|
if (result != sizeof(size_t) * 2) {
|
|
TRACE_OUT(on_read_request_read1);
|
|
return (-1);
|
|
}
|
|
|
|
if (BUFSIZE_INVALID(read_request->entry_length) ||
|
|
BUFSIZE_INVALID(read_request->cache_key_size)) {
|
|
TRACE_OUT(on_read_request_read1);
|
|
return (-1);
|
|
}
|
|
|
|
read_request->entry = calloc(1,
|
|
read_request->entry_length + 1);
|
|
assert(read_request->entry != NULL);
|
|
|
|
read_request->cache_key = calloc(1,
|
|
read_request->cache_key_size +
|
|
qstate->eid_str_length);
|
|
assert(read_request->cache_key != NULL);
|
|
memcpy(read_request->cache_key, qstate->eid_str,
|
|
qstate->eid_str_length);
|
|
|
|
qstate->kevent_watermark = read_request->entry_length +
|
|
read_request->cache_key_size;
|
|
qstate->process_func = on_read_request_read2;
|
|
}
|
|
|
|
TRACE_OUT(on_read_request_read1);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_read_request_read2(struct query_state *qstate)
|
|
{
|
|
struct cache_read_request *read_request;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_read_request_read2);
|
|
read_request = get_cache_read_request(&qstate->request);
|
|
|
|
result = qstate->read_func(qstate, read_request->entry,
|
|
read_request->entry_length);
|
|
result += qstate->read_func(qstate,
|
|
read_request->cache_key + qstate->eid_str_length,
|
|
read_request->cache_key_size);
|
|
|
|
if (result != (ssize_t)qstate->kevent_watermark) {
|
|
TRACE_OUT(on_read_request_read2);
|
|
return (-1);
|
|
}
|
|
read_request->cache_key_size += qstate->eid_str_length;
|
|
|
|
qstate->kevent_watermark = 0;
|
|
qstate->process_func = on_read_request_process;
|
|
|
|
TRACE_OUT(on_read_request_read2);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_read_request_process(struct query_state *qstate)
|
|
{
|
|
struct cache_read_request *read_request;
|
|
struct cache_read_response *read_response;
|
|
cache_entry c_entry, neg_c_entry;
|
|
|
|
struct agent *lookup_agent;
|
|
struct common_agent *c_agent;
|
|
int res;
|
|
|
|
TRACE_IN(on_read_request_process);
|
|
init_comm_element(&qstate->response, CET_READ_RESPONSE);
|
|
read_response = get_cache_read_response(&qstate->response);
|
|
read_request = get_cache_read_request(&qstate->request);
|
|
|
|
qstate->config_entry = configuration_find_entry(
|
|
s_configuration, read_request->entry);
|
|
if (qstate->config_entry == NULL) {
|
|
read_response->error_code = ENOENT;
|
|
|
|
LOG_ERR_2("read_request",
|
|
"can't find configuration "
|
|
"entry '%s'. aborting request", read_request->entry);
|
|
goto fin;
|
|
}
|
|
|
|
if (qstate->config_entry->enabled == 0) {
|
|
read_response->error_code = EACCES;
|
|
|
|
LOG_ERR_2("read_request",
|
|
"configuration entry '%s' is disabled",
|
|
read_request->entry);
|
|
goto fin;
|
|
}
|
|
|
|
/*
|
|
* if we perform lookups by ourselves, then we don't need to separate
|
|
* cache entries by euid and egid
|
|
*/
|
|
if (qstate->config_entry->perform_actual_lookups != 0)
|
|
memset(read_request->cache_key, 0, qstate->eid_str_length);
|
|
else {
|
|
#ifdef NS_NSCD_EID_CHECKING
|
|
if (check_query_eids(qstate) != 0) {
|
|
/* if the lookup is not self-performing, we check for clients euid/egid */
|
|
read_response->error_code = EPERM;
|
|
goto fin;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
configuration_lock_rdlock(s_configuration);
|
|
c_entry = find_cache_entry(s_cache,
|
|
qstate->config_entry->positive_cache_params.cep.entry_name);
|
|
neg_c_entry = find_cache_entry(s_cache,
|
|
qstate->config_entry->negative_cache_params.cep.entry_name);
|
|
configuration_unlock(s_configuration);
|
|
if ((c_entry != NULL) && (neg_c_entry != NULL)) {
|
|
configuration_lock_entry(qstate->config_entry, CELT_POSITIVE);
|
|
qstate->config_entry->positive_cache_entry = c_entry;
|
|
read_response->error_code = cache_read(c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size, NULL,
|
|
&read_response->data_size);
|
|
|
|
if (read_response->error_code == -2) {
|
|
read_response->data = malloc(
|
|
read_response->data_size);
|
|
assert(read_response->data != NULL);
|
|
read_response->error_code = cache_read(c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size,
|
|
read_response->data,
|
|
&read_response->data_size);
|
|
}
|
|
configuration_unlock_entry(qstate->config_entry, CELT_POSITIVE);
|
|
|
|
configuration_lock_entry(qstate->config_entry, CELT_NEGATIVE);
|
|
qstate->config_entry->negative_cache_entry = neg_c_entry;
|
|
if (read_response->error_code == -1) {
|
|
read_response->error_code = cache_read(neg_c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size, NULL,
|
|
&read_response->data_size);
|
|
|
|
if (read_response->error_code == -2) {
|
|
read_response->data = malloc(
|
|
read_response->data_size);
|
|
assert(read_response->data != NULL);
|
|
read_response->error_code = cache_read(neg_c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size,
|
|
read_response->data,
|
|
&read_response->data_size);
|
|
}
|
|
}
|
|
configuration_unlock_entry(qstate->config_entry, CELT_NEGATIVE);
|
|
|
|
if ((read_response->error_code == -1) &&
|
|
(qstate->config_entry->perform_actual_lookups != 0)) {
|
|
free(read_response->data);
|
|
read_response->data = NULL;
|
|
read_response->data_size = 0;
|
|
|
|
lookup_agent = find_agent(s_agent_table,
|
|
read_request->entry, COMMON_AGENT);
|
|
|
|
if ((lookup_agent != NULL) &&
|
|
(lookup_agent->type == COMMON_AGENT)) {
|
|
c_agent = (struct common_agent *)lookup_agent;
|
|
res = c_agent->lookup_func(
|
|
read_request->cache_key +
|
|
qstate->eid_str_length,
|
|
read_request->cache_key_size -
|
|
qstate->eid_str_length,
|
|
&read_response->data,
|
|
&read_response->data_size);
|
|
|
|
if (res == NS_SUCCESS) {
|
|
read_response->error_code = 0;
|
|
configuration_lock_entry(
|
|
qstate->config_entry,
|
|
CELT_POSITIVE);
|
|
cache_write(c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size,
|
|
read_response->data,
|
|
read_response->data_size);
|
|
configuration_unlock_entry(
|
|
qstate->config_entry,
|
|
CELT_POSITIVE);
|
|
} else if ((res == NS_NOTFOUND) ||
|
|
(res == NS_RETURN)) {
|
|
configuration_lock_entry(
|
|
qstate->config_entry,
|
|
CELT_NEGATIVE);
|
|
cache_write(neg_c_entry,
|
|
read_request->cache_key,
|
|
read_request->cache_key_size,
|
|
negative_data,
|
|
sizeof(negative_data));
|
|
configuration_unlock_entry(
|
|
qstate->config_entry,
|
|
CELT_NEGATIVE);
|
|
|
|
read_response->error_code = 0;
|
|
read_response->data = NULL;
|
|
read_response->data_size = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((qstate->config_entry->common_query_timeout.tv_sec != 0) ||
|
|
(qstate->config_entry->common_query_timeout.tv_usec != 0))
|
|
memcpy(&qstate->timeout,
|
|
&qstate->config_entry->common_query_timeout,
|
|
sizeof(struct timeval));
|
|
} else
|
|
read_response->error_code = -1;
|
|
|
|
fin:
|
|
qstate->kevent_filter = EVFILT_WRITE;
|
|
if (read_response->error_code == 0)
|
|
qstate->kevent_watermark = sizeof(int) + sizeof(size_t);
|
|
else
|
|
qstate->kevent_watermark = sizeof(int);
|
|
qstate->process_func = on_read_response_write1;
|
|
|
|
TRACE_OUT(on_read_request_process);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_read_response_write1(struct query_state *qstate)
|
|
{
|
|
struct cache_read_response *read_response;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_read_response_write1);
|
|
read_response = get_cache_read_response(&qstate->response);
|
|
|
|
result = qstate->write_func(qstate, &read_response->error_code,
|
|
sizeof(int));
|
|
|
|
if (read_response->error_code == 0) {
|
|
result += qstate->write_func(qstate, &read_response->data_size,
|
|
sizeof(size_t));
|
|
if (result != (ssize_t)qstate->kevent_watermark) {
|
|
TRACE_OUT(on_read_response_write1);
|
|
return (-1);
|
|
}
|
|
|
|
qstate->kevent_watermark = read_response->data_size;
|
|
qstate->process_func = on_read_response_write2;
|
|
} else {
|
|
if (result != (ssize_t)qstate->kevent_watermark) {
|
|
TRACE_OUT(on_read_response_write1);
|
|
return (-1);
|
|
}
|
|
|
|
qstate->kevent_watermark = 0;
|
|
qstate->process_func = NULL;
|
|
}
|
|
|
|
TRACE_OUT(on_read_response_write1);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_read_response_write2(struct query_state *qstate)
|
|
{
|
|
struct cache_read_response *read_response;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_read_response_write2);
|
|
read_response = get_cache_read_response(&qstate->response);
|
|
if (read_response->data_size > 0) {
|
|
result = qstate->write_func(qstate, read_response->data,
|
|
read_response->data_size);
|
|
if (result != (ssize_t)qstate->kevent_watermark) {
|
|
TRACE_OUT(on_read_response_write2);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
finalize_comm_element(&qstate->request);
|
|
finalize_comm_element(&qstate->response);
|
|
|
|
qstate->kevent_watermark = sizeof(int);
|
|
qstate->kevent_filter = EVFILT_READ;
|
|
qstate->process_func = on_rw_mapper;
|
|
TRACE_OUT(on_read_response_write2);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The functions below are used to process write requests.
|
|
* - on_transform_request_read1 and on_transform_request_read2 read the
|
|
* request itself
|
|
* - on_transform_request_process processes it
|
|
* - on_transform_response_write1 sends the response
|
|
*/
|
|
static int
|
|
on_transform_request_read1(struct query_state *qstate)
|
|
{
|
|
struct cache_transform_request *transform_request;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_transform_request_read1);
|
|
if (qstate->kevent_watermark == 0)
|
|
qstate->kevent_watermark = sizeof(size_t) + sizeof(int);
|
|
else {
|
|
init_comm_element(&qstate->request, CET_TRANSFORM_REQUEST);
|
|
transform_request =
|
|
get_cache_transform_request(&qstate->request);
|
|
|
|
result = qstate->read_func(qstate,
|
|
&transform_request->entry_length, sizeof(size_t));
|
|
result += qstate->read_func(qstate,
|
|
&transform_request->transformation_type, sizeof(int));
|
|
|
|
if (result != sizeof(size_t) + sizeof(int)) {
|
|
TRACE_OUT(on_transform_request_read1);
|
|
return (-1);
|
|
}
|
|
|
|
if ((transform_request->transformation_type != TT_USER) &&
|
|
(transform_request->transformation_type != TT_ALL)) {
|
|
TRACE_OUT(on_transform_request_read1);
|
|
return (-1);
|
|
}
|
|
|
|
if (transform_request->entry_length != 0) {
|
|
if (BUFSIZE_INVALID(transform_request->entry_length)) {
|
|
TRACE_OUT(on_transform_request_read1);
|
|
return (-1);
|
|
}
|
|
|
|
transform_request->entry = calloc(1,
|
|
transform_request->entry_length + 1);
|
|
assert(transform_request->entry != NULL);
|
|
|
|
qstate->process_func = on_transform_request_read2;
|
|
} else
|
|
qstate->process_func = on_transform_request_process;
|
|
|
|
qstate->kevent_watermark = transform_request->entry_length;
|
|
}
|
|
|
|
TRACE_OUT(on_transform_request_read1);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_transform_request_read2(struct query_state *qstate)
|
|
{
|
|
struct cache_transform_request *transform_request;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_transform_request_read2);
|
|
transform_request = get_cache_transform_request(&qstate->request);
|
|
|
|
result = qstate->read_func(qstate, transform_request->entry,
|
|
transform_request->entry_length);
|
|
|
|
if (result != (ssize_t)qstate->kevent_watermark) {
|
|
TRACE_OUT(on_transform_request_read2);
|
|
return (-1);
|
|
}
|
|
|
|
qstate->kevent_watermark = 0;
|
|
qstate->process_func = on_transform_request_process;
|
|
|
|
TRACE_OUT(on_transform_request_read2);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_transform_request_process(struct query_state *qstate)
|
|
{
|
|
struct cache_transform_request *transform_request;
|
|
struct cache_transform_response *transform_response;
|
|
struct configuration_entry *config_entry;
|
|
size_t i, size;
|
|
|
|
TRACE_IN(on_transform_request_process);
|
|
init_comm_element(&qstate->response, CET_TRANSFORM_RESPONSE);
|
|
transform_response = get_cache_transform_response(&qstate->response);
|
|
transform_request = get_cache_transform_request(&qstate->request);
|
|
|
|
switch (transform_request->transformation_type) {
|
|
case TT_USER:
|
|
if (transform_request->entry == NULL) {
|
|
size = configuration_get_entries_size(s_configuration);
|
|
for (i = 0; i < size; ++i) {
|
|
config_entry = configuration_get_entry(
|
|
s_configuration, i);
|
|
|
|
if (config_entry->perform_actual_lookups == 0)
|
|
clear_config_entry_part(config_entry,
|
|
qstate->eid_str, qstate->eid_str_length);
|
|
}
|
|
} else {
|
|
qstate->config_entry = configuration_find_entry(
|
|
s_configuration, transform_request->entry);
|
|
|
|
if (qstate->config_entry == NULL) {
|
|
LOG_ERR_2("transform_request",
|
|
"can't find configuration"
|
|
" entry '%s'. aborting request",
|
|
transform_request->entry);
|
|
transform_response->error_code = -1;
|
|
goto fin;
|
|
}
|
|
|
|
if (qstate->config_entry->perform_actual_lookups != 0) {
|
|
LOG_ERR_2("transform_request",
|
|
"can't transform the cache entry %s"
|
|
", because it ised for actual lookups",
|
|
transform_request->entry);
|
|
transform_response->error_code = -1;
|
|
goto fin;
|
|
}
|
|
|
|
clear_config_entry_part(qstate->config_entry,
|
|
qstate->eid_str, qstate->eid_str_length);
|
|
}
|
|
break;
|
|
case TT_ALL:
|
|
if (qstate->euid != 0)
|
|
transform_response->error_code = -1;
|
|
else {
|
|
if (transform_request->entry == NULL) {
|
|
size = configuration_get_entries_size(
|
|
s_configuration);
|
|
for (i = 0; i < size; ++i) {
|
|
clear_config_entry(
|
|
configuration_get_entry(
|
|
s_configuration, i));
|
|
}
|
|
} else {
|
|
qstate->config_entry = configuration_find_entry(
|
|
s_configuration,
|
|
transform_request->entry);
|
|
|
|
if (qstate->config_entry == NULL) {
|
|
LOG_ERR_2("transform_request",
|
|
"can't find configuration"
|
|
" entry '%s'. aborting request",
|
|
transform_request->entry);
|
|
transform_response->error_code = -1;
|
|
goto fin;
|
|
}
|
|
|
|
clear_config_entry(qstate->config_entry);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
transform_response->error_code = -1;
|
|
}
|
|
|
|
fin:
|
|
qstate->kevent_watermark = 0;
|
|
qstate->process_func = on_transform_response_write1;
|
|
TRACE_OUT(on_transform_request_process);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
on_transform_response_write1(struct query_state *qstate)
|
|
{
|
|
struct cache_transform_response *transform_response;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(on_transform_response_write1);
|
|
transform_response = get_cache_transform_response(&qstate->response);
|
|
result = qstate->write_func(qstate, &transform_response->error_code,
|
|
sizeof(int));
|
|
if (result != sizeof(int)) {
|
|
TRACE_OUT(on_transform_response_write1);
|
|
return (-1);
|
|
}
|
|
|
|
finalize_comm_element(&qstate->request);
|
|
finalize_comm_element(&qstate->response);
|
|
|
|
qstate->kevent_watermark = 0;
|
|
qstate->process_func = NULL;
|
|
TRACE_OUT(on_transform_response_write1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Checks if the client's euid and egid do not differ from its uid and gid.
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
check_query_eids(struct query_state *qstate)
|
|
{
|
|
|
|
return ((qstate->uid != qstate->euid) || (qstate->gid != qstate->egid) ? -1 : 0);
|
|
}
|
|
|
|
/*
|
|
* Uses the qstate fields to process an "alternate" read - when the buffer is
|
|
* too large to be received during one socket read operation
|
|
*/
|
|
ssize_t
|
|
query_io_buffer_read(struct query_state *qstate, void *buf, size_t nbytes)
|
|
{
|
|
size_t remaining;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(query_io_buffer_read);
|
|
if ((qstate->io_buffer_size == 0) || (qstate->io_buffer == NULL))
|
|
return (-1);
|
|
|
|
assert(qstate->io_buffer_p <=
|
|
qstate->io_buffer + qstate->io_buffer_size);
|
|
remaining = qstate->io_buffer + qstate->io_buffer_size -
|
|
qstate->io_buffer_p;
|
|
if (nbytes < remaining)
|
|
result = nbytes;
|
|
else
|
|
result = remaining;
|
|
|
|
memcpy(buf, qstate->io_buffer_p, result);
|
|
qstate->io_buffer_p += result;
|
|
|
|
if (remaining == 0) {
|
|
free(qstate->io_buffer);
|
|
qstate->io_buffer = NULL;
|
|
|
|
qstate->write_func = query_socket_write;
|
|
qstate->read_func = query_socket_read;
|
|
}
|
|
|
|
TRACE_OUT(query_io_buffer_read);
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* Uses the qstate fields to process an "alternate" write - when the buffer is
|
|
* too large to be sent during one socket write operation
|
|
*/
|
|
ssize_t
|
|
query_io_buffer_write(struct query_state *qstate, const void *buf,
|
|
size_t nbytes)
|
|
{
|
|
size_t remaining;
|
|
ssize_t result;
|
|
|
|
TRACE_IN(query_io_buffer_write);
|
|
if ((qstate->io_buffer_size == 0) || (qstate->io_buffer == NULL))
|
|
return (-1);
|
|
|
|
assert(qstate->io_buffer_p <=
|
|
qstate->io_buffer + qstate->io_buffer_size);
|
|
remaining = qstate->io_buffer + qstate->io_buffer_size -
|
|
qstate->io_buffer_p;
|
|
if (nbytes < remaining)
|
|
result = nbytes;
|
|
else
|
|
result = remaining;
|
|
|
|
memcpy(qstate->io_buffer_p, buf, result);
|
|
qstate->io_buffer_p += result;
|
|
|
|
if (remaining == 0) {
|
|
qstate->use_alternate_io = 1;
|
|
qstate->io_buffer_p = qstate->io_buffer;
|
|
|
|
qstate->write_func = query_socket_write;
|
|
qstate->read_func = query_socket_read;
|
|
}
|
|
|
|
TRACE_OUT(query_io_buffer_write);
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* The default "read" function, which reads data directly from socket
|
|
*/
|
|
ssize_t
|
|
query_socket_read(struct query_state *qstate, void *buf, size_t nbytes)
|
|
{
|
|
ssize_t result;
|
|
|
|
TRACE_IN(query_socket_read);
|
|
if (qstate->socket_failed != 0) {
|
|
TRACE_OUT(query_socket_read);
|
|
return (-1);
|
|
}
|
|
|
|
result = read(qstate->sockfd, buf, nbytes);
|
|
if (result < 0 || (size_t)result < nbytes)
|
|
qstate->socket_failed = 1;
|
|
|
|
TRACE_OUT(query_socket_read);
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* The default "write" function, which writes data directly to socket
|
|
*/
|
|
ssize_t
|
|
query_socket_write(struct query_state *qstate, const void *buf, size_t nbytes)
|
|
{
|
|
ssize_t result;
|
|
|
|
TRACE_IN(query_socket_write);
|
|
if (qstate->socket_failed != 0) {
|
|
TRACE_OUT(query_socket_write);
|
|
return (-1);
|
|
}
|
|
|
|
result = write(qstate->sockfd, buf, nbytes);
|
|
if (result < 0 || (size_t)result < nbytes)
|
|
qstate->socket_failed = 1;
|
|
|
|
TRACE_OUT(query_socket_write);
|
|
return (result);
|
|
}
|
|
|
|
/*
|
|
* Initializes the query_state structure by filling it with the default values.
|
|
*/
|
|
struct query_state *
|
|
init_query_state(int sockfd, size_t kevent_watermark, uid_t euid, gid_t egid)
|
|
{
|
|
struct query_state *retval;
|
|
|
|
TRACE_IN(init_query_state);
|
|
retval = calloc(1, sizeof(*retval));
|
|
assert(retval != NULL);
|
|
|
|
retval->sockfd = sockfd;
|
|
retval->kevent_filter = EVFILT_READ;
|
|
retval->kevent_watermark = kevent_watermark;
|
|
|
|
retval->euid = euid;
|
|
retval->egid = egid;
|
|
retval->uid = retval->gid = -1;
|
|
|
|
if (asprintf(&retval->eid_str, "%d_%d_", retval->euid,
|
|
retval->egid) == -1) {
|
|
free(retval);
|
|
return (NULL);
|
|
}
|
|
retval->eid_str_length = strlen(retval->eid_str);
|
|
|
|
init_comm_element(&retval->request, CET_UNDEFINED);
|
|
init_comm_element(&retval->response, CET_UNDEFINED);
|
|
retval->process_func = on_query_startup;
|
|
retval->destroy_func = on_query_destroy;
|
|
|
|
retval->write_func = query_socket_write;
|
|
retval->read_func = query_socket_read;
|
|
|
|
get_time_func(&retval->creation_time);
|
|
retval->timeout.tv_sec = s_configuration->query_timeout;
|
|
retval->timeout.tv_usec = 0;
|
|
|
|
TRACE_OUT(init_query_state);
|
|
return (retval);
|
|
}
|
|
|
|
void
|
|
destroy_query_state(struct query_state *qstate)
|
|
{
|
|
|
|
TRACE_IN(destroy_query_state);
|
|
if (qstate->eid_str != NULL)
|
|
free(qstate->eid_str);
|
|
|
|
if (qstate->io_buffer != NULL)
|
|
free(qstate->io_buffer);
|
|
|
|
qstate->destroy_func(qstate);
|
|
free(qstate);
|
|
TRACE_OUT(destroy_query_state);
|
|
}
|