2 * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
33 #include <sys/event.h>
34 #include <sys/socket.h>
49 #define DEFAULT_NSCD_IO_TIMEOUT 4
51 static int safe_write(struct nscd_connection_ *, const void *, size_t);
52 static int safe_read(struct nscd_connection_ *, void *, size_t);
53 static int send_credentials(struct nscd_connection_ *, int);
56 safe_write(struct nscd_connection_ *connection, const void *data,
59 struct kevent eventlist;
63 struct timespec timeout;
68 timeout.tv_sec = DEFAULT_NSCD_IO_TIMEOUT;
72 nevents = kevent(connection->write_queue, NULL, 0, &eventlist,
74 if ((nevents == 1) && (eventlist.filter == EVFILT_WRITE)) {
75 s_result = write(connection->sockfd,
76 (char *)data + result,
77 (size_t)eventlist.data < data_size - result ?
78 (size_t)eventlist.data : data_size - result);
84 if (eventlist.flags & EV_EOF)
85 return (result < data_size ? -1 : 0);
88 } while (result < data_size);
94 safe_read(struct nscd_connection_ *connection, void *data, size_t data_size)
96 struct kevent eventlist;
99 struct timespec timeout;
105 timeout.tv_sec = DEFAULT_NSCD_IO_TIMEOUT;
109 nevents = kevent(connection->read_queue, NULL, 0, &eventlist, 1,
111 if ((nevents == 1) && (eventlist.filter == EVFILT_READ)) {
112 s_result = read(connection->sockfd,
113 (char *)data + result,
114 (size_t)eventlist.data <= data_size - result ?
115 (size_t)eventlist.data : data_size - result);
121 if (eventlist.flags & EV_EOF)
122 return (result < data_size ? -1 : 0);
125 } while (result < data_size);
131 send_credentials(struct nscd_connection_ *connection, int type)
135 char pad[CMSG_SPACE(sizeof(struct cmsgcred))];
139 struct kevent eventlist;
143 TRACE_IN(send_credentials);
144 memset(&cmsg, 0, sizeof(cmsg));
145 cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(struct cmsgcred));
146 cmsg.hdr.cmsg_level = SOL_SOCKET;
147 cmsg.hdr.cmsg_type = SCM_CREDS;
149 memset(&mhdr, 0, sizeof(mhdr));
152 mhdr.msg_control = &cmsg;
153 mhdr.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
155 iov.iov_base = &type;
156 iov.iov_len = sizeof(int);
158 EV_SET(&eventlist, connection->sockfd, EVFILT_WRITE, EV_ADD,
159 NOTE_LOWAT, sizeof(int), NULL);
160 kevent(connection->write_queue, &eventlist, 1, NULL, 0, NULL);
162 nevents = kevent(connection->write_queue, NULL, 0, &eventlist, 1, NULL);
163 if ((nevents == 1) && (eventlist.filter == EVFILT_WRITE)) {
164 result = sendmsg(connection->sockfd, &mhdr, 0) == -1 ? -1 : 0;
165 EV_SET(&eventlist, connection->sockfd, EVFILT_WRITE, EV_ADD,
167 kevent(connection->write_queue, &eventlist, 1, NULL, 0, NULL);
168 TRACE_OUT(send_credentials);
171 TRACE_OUT(send_credentials);
176 struct nscd_connection_ *
177 open_nscd_connection__(struct nscd_connection_params const *params)
179 struct nscd_connection_ *retval;
180 struct kevent eventlist;
181 struct sockaddr_un client_address;
182 int client_address_len, client_socket;
185 TRACE_IN(open_nscd_connection);
186 assert(params != NULL);
188 client_socket = socket(PF_LOCAL, SOCK_STREAM, 0);
189 client_address.sun_family = PF_LOCAL;
190 strlcpy(client_address.sun_path, params->socket_path,
191 sizeof(client_address.sun_path));
192 client_address_len = sizeof(client_address.sun_family) +
193 strlen(client_address.sun_path) + 1;
195 res = connect(client_socket, (struct sockaddr *)&client_address,
198 close(client_socket);
199 TRACE_OUT(open_nscd_connection);
202 fcntl(client_socket, F_SETFL, O_NONBLOCK);
204 retval = calloc(1, sizeof(*retval));
205 assert(retval != NULL);
207 retval->sockfd = client_socket;
209 retval->write_queue = kqueue();
210 assert(retval->write_queue != -1);
212 EV_SET(&eventlist, retval->sockfd, EVFILT_WRITE, EV_ADD,
214 res = kevent(retval->write_queue, &eventlist, 1, NULL, 0, NULL);
216 retval->read_queue = kqueue();
217 assert(retval->read_queue != -1);
219 EV_SET(&eventlist, retval->sockfd, EVFILT_READ, EV_ADD,
221 res = kevent(retval->read_queue, &eventlist, 1, NULL, 0, NULL);
223 TRACE_OUT(open_nscd_connection);
228 close_nscd_connection__(struct nscd_connection_ *connection)
231 TRACE_IN(close_nscd_connection);
232 assert(connection != NULL);
234 close(connection->sockfd);
235 close(connection->read_queue);
236 close(connection->write_queue);
238 TRACE_OUT(close_nscd_connection);
242 nscd_transform__(struct nscd_connection_ *connection,
243 const char *entry_name, int transformation_type)
249 TRACE_IN(nscd_transform);
253 result = send_credentials(connection, CET_TRANSFORM_REQUEST);
257 if (entry_name != NULL)
258 name_size = strlen(entry_name);
262 result = safe_write(connection, &name_size, sizeof(size_t));
266 result = safe_write(connection, &transformation_type, sizeof(int));
270 if (entry_name != NULL) {
271 result = safe_write(connection, entry_name, name_size);
276 result = safe_read(connection, &error_code, sizeof(int));
281 TRACE_OUT(nscd_transform);