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);
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];
142 /* DECnet displays have two colons, so _xcb_parse_display will have
143 left one at the end. However, an IPv6 address can end with *two*
144 colons, so only treat this as a DECnet display if host ends with
145 exactly one colon. */
146 char *colon = strchr(host, ':');
147 if(colon && *(colon+1) == '\0')
150 return _xcb_open_decnet(host, protocol, display);
155 || strcmp("unix",host)) { /* follow the old unix: rule */
157 /* display specifies TCP */
158 unsigned short port = X_TCP_PORT + display;
159 return _xcb_open_tcp(host, protocol, port);
163 /* display specifies Unix socket */
164 snprintf(file, sizeof(file), "%s%d", base, display);
165 #ifdef HAVE_ABSTRACT_SOCKETS
166 fd = _xcb_open_abstract(protocol, file);
167 if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED))
171 return _xcb_open_unix(protocol, file);
175 static int _xcb_open_decnet(const char *host, const char *protocol, const unsigned short port)
178 struct sockaddr_dn addr;
179 struct accessdata_dn accessdata;
180 struct nodeent *nodeaddr = getnodebyname(host);
184 if (protocol && strcmp("dnet",protocol))
186 addr.sdn_family = AF_DECnet;
188 addr.sdn_add.a_len = nodeaddr->n_length;
189 memcpy(addr.sdn_add.a_addr, nodeaddr->n_addr, addr.sdn_add.a_len);
191 sprintf((char *)addr.sdn_objname, "X$X%d", port);
192 addr.sdn_objnamel = strlen((char *)addr.sdn_objname);
195 fd = socket(PF_DECnet, SOCK_STREAM, 0);
199 memset(&accessdata, 0, sizeof(accessdata));
200 sprintf((char*)accessdata.acc_acc, "%d", getuid());
201 accessdata.acc_accl = strlen((char *)accessdata.acc_acc);
202 setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
204 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
212 static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port)
215 struct addrinfo hints;
216 char service[6]; /* "65535" with the trailing '\0' */
217 struct addrinfo *results, *addr;
220 if (protocol && strcmp("tcp",protocol))
223 memset(&hints, 0, sizeof(hints));
225 hints.ai_flags |= AI_ADDRCONFIG;
227 #ifdef AI_NUMERICSERV
228 hints.ai_flags |= AI_NUMERICSERV;
230 hints.ai_family = AF_UNSPEC;
231 hints.ai_socktype = SOCK_STREAM;
234 /* Allow IPv6 addresses enclosed in brackets. */
235 if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
239 hints.ai_flags |= AI_NUMERICHOST;
240 hints.ai_family = AF_INET6;
244 snprintf(service, sizeof(service), "%hu", port);
245 if(getaddrinfo(host, service, &hints, &results))
246 /* FIXME: use gai_strerror, and fill in error connection */
249 for(addr = results; addr; addr = addr->ai_next)
251 fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
253 if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
259 freeaddrinfo(results);
263 static int _xcb_open_unix(char *protocol, const char *file)
266 struct sockaddr_un addr;
268 if (protocol && strcmp("unix",protocol))
271 strcpy(addr.sun_path, file);
272 addr.sun_family = AF_UNIX;
273 #ifdef HAVE_SOCKADDR_SUN_LEN
274 addr.sun_len = SUN_LEN(&addr);
276 fd = socket(AF_UNIX, SOCK_STREAM, 0);
279 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
286 #ifdef HAVE_ABSTRACT_SOCKETS
287 static int _xcb_open_abstract(char *protocol, const char *file)
290 struct sockaddr_un addr = {0};
293 if (protocol && strcmp("unix",protocol))
296 strcpy(addr.sun_path + 1, file);
297 addr.sun_family = AF_UNIX;
298 namelen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(file);
299 #ifdef HAVE_SOCKADDR_SUN_LEN
300 addr.sun_len = 1 + strlen(file);
302 fd = socket(AF_UNIX, SOCK_STREAM, 0);
305 if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) {
313 xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
319 xcb_auth_info_t auth;
321 int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp);
325 displayname = getenv("DISPLAY");
326 if(displayname && strlen(displayname)>11 && !strncmp(displayname, "/tmp/launch", 11))
327 fd = _xcb_open_unix(NULL, displayname);
331 return (xcb_connection_t *) &error_connection;
333 fd = _xcb_open(host, protocol, display);
337 return (xcb_connection_t *) &error_connection;
339 if(_xcb_get_auth_info(fd, &auth, display))
341 c = xcb_connect_to_fd(fd, &auth);
346 c = xcb_connect_to_fd(fd, 0);
350 xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
356 int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp);
360 displayname = getenv("DISPLAY");
361 if(displayname && strlen(displayname)>11 && !strncmp(displayname, "/tmp/launch", 11))
362 fd = _xcb_open_unix(NULL, displayname);
366 return (xcb_connection_t *) &error_connection;
368 fd = _xcb_open(host, protocol, display);
372 return (xcb_connection_t *) &error_connection;
374 return xcb_connect_to_fd(fd, auth);