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 /* Utility functions implementable using only public APIs. */
29 #include <sys/types.h>
30 #include <sys/socket.h>
32 #include <netinet/in.h>
34 #include <netdnet/dnetdb.h>
35 #include <netdnet/dn.h>
49 static const int error_connection = 1;
51 int xcb_popcount(uint32_t mask)
54 y = (mask >> 1) & 033333333333;
55 y = mask - y - ((y >> 1) & 033333333333);
56 return ((y + (y >> 3)) & 030707070707) % 077;
59 static int _xcb_parse_display(const char *name, char **host, char **protocol,
60 int *displayp, int *screenp)
62 int len, display, screen;
63 char *slash, *colon, *dot, *end;
65 name = getenv("DISPLAY");
68 slash = strrchr(name, '/');
72 *protocol = malloc(len + 1);
75 memcpy(*protocol, name, len);
76 (*protocol)[len] = '\0';
83 colon = strrchr(name, ':');
88 display = strtoul(colon, &dot, 10);
98 screen = strtoul(dot, &end, 10);
99 if(end == dot || *end != '\0')
102 /* At this point, the display string is fully parsed and valid, but
103 * the caller's memory is untouched. */
105 *host = malloc(len + 1);
108 memcpy(*host, name, len);
116 int xcb_parse_display(const char *name, char **host, int *displayp,
119 return _xcb_parse_display(name, host, NULL, displayp, screenp);
122 static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port);
123 static int _xcb_open_unix(char *protocol, const char *file);
125 static int _xcb_open_decnet(const char *host, char *protocol, const unsigned short port);
127 #ifdef HAVE_ABSTRACT_SOCKETS
128 static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen);
131 static int _xcb_open(char *host, char *protocol, const int display)
133 #ifdef HAVE_ABSTRACT_SOCKETS
136 static const char base[] = "/tmp/.X11-unix/X";
137 char file[sizeof(base) + 20];
143 /* DECnet displays have two colons, so _xcb_parse_display will have
144 left one at the end. However, an IPv6 address can end with *two*
145 colons, so only treat this as a DECnet display if host ends with
146 exactly one colon. */
147 char *colon = strchr(host, ':');
148 if(colon && *(colon+1) == '\0')
151 return _xcb_open_decnet(host, protocol, display);
156 || strcmp("unix",host)) { /* follow the old unix: rule */
158 /* display specifies TCP */
159 unsigned short port = X_TCP_PORT + display;
160 return _xcb_open_tcp(host, protocol, port);
164 /* display specifies Unix socket */
165 filelen = snprintf(file, sizeof(file), "%s%d", base, display);
168 /* snprintf may truncate the file */
169 filelen = MIN(filelen, sizeof(file) - 1);
170 #ifdef HAVE_ABSTRACT_SOCKETS
171 fd = _xcb_open_abstract(protocol, file, filelen);
172 if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED))
176 return _xcb_open_unix(protocol, file);
180 static int _xcb_open_decnet(const char *host, const char *protocol, const unsigned short port)
183 struct sockaddr_dn addr;
184 struct accessdata_dn accessdata;
185 struct nodeent *nodeaddr = getnodebyname(host);
189 if (protocol && strcmp("dnet",protocol))
191 addr.sdn_family = AF_DECnet;
193 addr.sdn_add.a_len = nodeaddr->n_length;
194 memcpy(addr.sdn_add.a_addr, nodeaddr->n_addr, addr.sdn_add.a_len);
196 addr.sdn_objnamel = sprintf((char *)addr.sdn_objname, "X$X%d", port);
197 if(addr.sdn_objnamel < 0)
201 fd = socket(PF_DECnet, SOCK_STREAM, 0);
205 memset(&accessdata, 0, sizeof(accessdata));
206 accessdata.acc_accl = sprintf((char*)accessdata.acc_acc, "%d", getuid());
207 if(accessdata.acc_accl < 0)
209 setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
211 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
219 static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port)
222 struct addrinfo hints;
223 char service[6]; /* "65535" with the trailing '\0' */
224 struct addrinfo *results, *addr;
227 if (protocol && strcmp("tcp",protocol))
230 memset(&hints, 0, sizeof(hints));
232 hints.ai_flags |= AI_ADDRCONFIG;
234 #ifdef AI_NUMERICSERV
235 hints.ai_flags |= AI_NUMERICSERV;
237 hints.ai_family = AF_UNSPEC;
238 hints.ai_socktype = SOCK_STREAM;
241 /* Allow IPv6 addresses enclosed in brackets. */
242 if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
246 hints.ai_flags |= AI_NUMERICHOST;
247 hints.ai_family = AF_INET6;
251 snprintf(service, sizeof(service), "%hu", port);
252 if(getaddrinfo(host, service, &hints, &results))
253 /* FIXME: use gai_strerror, and fill in error connection */
256 for(addr = results; addr; addr = addr->ai_next)
258 fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
260 if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
266 freeaddrinfo(results);
270 static int _xcb_open_unix(char *protocol, const char *file)
273 struct sockaddr_un addr;
275 if (protocol && strcmp("unix",protocol))
278 strcpy(addr.sun_path, file);
279 addr.sun_family = AF_UNIX;
280 #ifdef HAVE_SOCKADDR_SUN_LEN
281 addr.sun_len = SUN_LEN(&addr);
283 fd = socket(AF_UNIX, SOCK_STREAM, 0);
286 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
293 #ifdef HAVE_ABSTRACT_SOCKETS
294 static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen)
297 struct sockaddr_un addr = {0};
300 if (protocol && strcmp("unix",protocol))
303 strcpy(addr.sun_path + 1, file);
304 addr.sun_family = AF_UNIX;
305 namelen = offsetof(struct sockaddr_un, sun_path) + 1 + filelen;
306 #ifdef HAVE_SOCKADDR_SUN_LEN
307 addr.sun_len = 1 + filelen;
309 fd = socket(AF_UNIX, SOCK_STREAM, 0);
312 if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) {
320 xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
322 return xcb_connect_to_display_with_auth_info(displayname, NULL, screenp);
325 xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
330 xcb_auth_info_t ourauth;
333 int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp);
337 displayname = getenv("DISPLAY");
338 if(displayname && strlen(displayname)>11 && !strncmp(displayname, "/tmp/launch", 11))
339 fd = _xcb_open_unix(NULL, displayname);
343 return (xcb_connection_t *) &error_connection;
345 fd = _xcb_open(host, protocol, display);
349 return (xcb_connection_t *) &error_connection;
352 return xcb_connect_to_fd(fd, auth);
354 if(_xcb_get_auth_info(fd, &ourauth, display))
356 c = xcb_connect_to_fd(fd, &ourauth);
361 c = xcb_connect_to_fd(fd, 0);