1 /* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
3 * Permission is hereby granted, free of charge, to any person obtaining a
4 * copy of this software and associated documentation files (the "Software"),
5 * to deal in the Software without restriction, including without limitation
6 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
7 * and/or sell copies of the Software, and to permit persons to whom the
8 * Software is furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
17 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
18 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 * Except as contained in this notice, the names of the authors or their
21 * institutions shall not be used in advertising or otherwise to promote the
22 * sale, use or other dealings in this Software without prior written
23 * authorization from the authors.
26 /* Connection management: the core of XCB. */
33 #include <netinet/in.h>
34 #include <sys/select.h>
35 #include <sys/fcntl.h>
40 static int set_fd_flags(const int fd)
42 long flags = fcntl(fd, F_GETFL, 0);
46 if(fcntl(fd, F_SETFL, flags) == -1)
48 if(fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
53 static int write_setup(XCBConnection *c, XCBAuthInfo *auth_info)
55 static const char pad[3];
57 struct iovec parts[6];
59 int endian = 0x01020304;
62 memset(&out, 0, sizeof(out));
64 /* B = 0x42 = MSB first, l = 0x6c = LSB first */
65 if(htonl(endian) == endian)
66 out.byte_order = 0x42;
68 out.byte_order = 0x6c;
69 out.protocol_major_version = X_PROTOCOL;
70 out.protocol_minor_version = X_PROTOCOL_REVISION;
71 out.authorization_protocol_name_len = 0;
72 out.authorization_protocol_data_len = 0;
73 parts[count].iov_len = sizeof(XCBConnSetupReq);
74 parts[count++].iov_base = &out;
75 parts[count].iov_len = XCB_PAD(sizeof(XCBConnSetupReq));
76 parts[count++].iov_base = (caddr_t) pad;
80 parts[count].iov_len = out.authorization_protocol_name_len = auth_info->namelen;
81 parts[count++].iov_base = auth_info->name;
82 parts[count].iov_len = XCB_PAD(out.authorization_protocol_name_len);
83 parts[count++].iov_base = (caddr_t) pad;
84 parts[count].iov_len = out.authorization_protocol_data_len = auth_info->datalen;
85 parts[count++].iov_base = auth_info->data;
86 parts[count].iov_len = XCB_PAD(out.authorization_protocol_data_len);
87 parts[count++].iov_base = (caddr_t) pad;
89 assert(count <= sizeof(parts) / sizeof(*parts));
91 pthread_mutex_lock(&c->iolock);
92 _xcb_out_write_block(c, parts, count);
93 ret = _xcb_out_flush(c);
94 pthread_mutex_unlock(&c->iolock);
98 static int read_setup(XCBConnection *c)
100 /* Read the server response */
101 c->setup = malloc(sizeof(XCBConnSetupGenericRep));
105 if(_xcb_in_read_block(c, c->setup, sizeof(XCBConnSetupGenericRep)) != sizeof(XCBConnSetupGenericRep))
109 void *tmp = realloc(c->setup, c->setup->length * 4 + sizeof(XCBConnSetupGenericRep));
115 if(_xcb_in_read_block(c, (char *) c->setup + sizeof(XCBConnSetupGenericRep), c->setup->length * 4) <= 0)
118 /* 0 = failed, 2 = authenticate, 1 = success */
119 switch(c->setup->status)
123 XCBConnSetupFailedRep *setup = (XCBConnSetupFailedRep *) c->setup;
124 write(STDERR_FILENO, XCBConnSetupFailedRepReason(setup), XCBConnSetupFailedRepReasonLength(setup));
128 case 2: /* authenticate */
130 XCBConnSetupAuthenticateRep *setup = (XCBConnSetupAuthenticateRep *) c->setup;
131 write(STDERR_FILENO, XCBConnSetupAuthenticateRepReason(setup), XCBConnSetupAuthenticateRepReasonLength(setup));
139 /* Public interface */
141 XCBConnSetupSuccessRep *XCBGetSetup(XCBConnection *c)
143 /* doesn't need locking because it's never written to. */
147 int XCBGetFileDescriptor(XCBConnection *c)
149 /* doesn't need locking because it's never written to. */
153 XCBConnection *XCBConnectToFD(int fd, XCBAuthInfo *auth_info)
157 c = calloc(1, sizeof(XCBConnection));
165 pthread_mutex_init(&c->iolock, 0) == 0 &&
166 _xcb_in_init(&c->in) &&
167 _xcb_out_init(&c->out) &&
168 write_setup(c, auth_info) &&
181 void XCBDisconnect(XCBConnection *c)
189 pthread_mutex_destroy(&c->iolock);
190 _xcb_in_destroy(&c->in);
191 _xcb_out_destroy(&c->out);
199 /* Private interface */
201 int _xcb_conn_wait(XCBConnection *c, pthread_cond_t *cond, struct iovec **vector, int *count)
206 /* If the thing I should be doing is already being done, wait for it. */
207 if(count ? c->out.writing : c->in.reading)
209 pthread_cond_wait(cond, &c->iolock);
214 FD_SET(c->fd, &rfds);
220 FD_SET(c->fd, &wfds);
224 pthread_mutex_unlock(&c->iolock);
225 ret = select(c->fd + 1, &rfds, &wfds, 0, 0) > 0;
226 pthread_mutex_lock(&c->iolock);
230 if(FD_ISSET(c->fd, &rfds))
231 ret = ret && _xcb_in_read(c);
233 if(FD_ISSET(c->fd, &wfds))
234 ret = ret && _xcb_out_write(c, vector, count);