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>
48 static const int error_connection = 1;
50 int xcb_popcount(uint32_t mask)
53 y = (mask >> 1) & 033333333333;
54 y = mask - y - ((y >> 1) & 033333333333);
55 return ((y + (y >> 3)) & 030707070707) % 077;
58 static int _xcb_parse_display(const char *name, char **host, char **protocol,
59 int *displayp, int *screenp)
61 int len, display, screen;
62 char *slash, *colon, *dot, *end;
64 name = getenv("DISPLAY");
67 slash = strrchr(name, '/');
71 *protocol = malloc(len + 1);
74 memcpy(*protocol, name, len);
75 (*protocol)[len] = '\0';
82 colon = strrchr(name, ':');
87 display = strtoul(colon, &dot, 10);
97 screen = strtoul(dot, &end, 10);
98 if(end == dot || *end != '\0')
101 /* At this point, the display string is fully parsed and valid, but
102 * the caller's memory is untouched. */
104 *host = malloc(len + 1);
107 memcpy(*host, name, len);
115 int xcb_parse_display(const char *name, char **host, int *displayp,
118 return _xcb_parse_display(name, host, NULL, displayp, screenp);
121 static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port);
122 static int _xcb_open_unix(char *protocol, const char *file);
124 static int _xcb_open_decnet(const char *host, char *protocol, const unsigned short port);
127 static int _xcb_open(char *host, char *protocol, const int display)
130 static const char base[] = "/tmp/.X11-unix/X";
131 char file[sizeof(base) + 20];
136 /* DECnet displays have two colons, so _xcb_parse_display will have
137 left one at the end. However, an IPv6 address can end with *two*
138 colons, so only treat this as a DECnet display if host ends with
139 exactly one colon. */
140 char *colon = strchr(host, ':');
141 if(colon && *(colon+1) == '\0')
144 return _xcb_open_decnet(host, protocol, display);
149 || strcmp("unix",host)) { /* follow the old unix: rule */
151 /* display specifies TCP */
152 unsigned short port = X_TCP_PORT + display;
153 return _xcb_open_tcp(host, protocol, port);
157 /* display specifies Unix socket */
158 snprintf(file, sizeof(file), "%s%d", base, display);
159 return _xcb_open_unix(protocol, file);
166 static int _xcb_open_decnet(const char *host, const char *protocol, const unsigned short port)
169 struct sockaddr_dn addr;
170 struct accessdata_dn accessdata;
171 struct nodeent *nodeaddr = getnodebyname(host);
175 if (protocol && strcmp("dnet",protocol))
177 addr.sdn_family = AF_DECnet;
179 addr.sdn_add.a_len = nodeaddr->n_length;
180 memcpy(addr.sdn_add.a_addr, nodeaddr->n_addr, addr.sdn_add.a_len);
182 sprintf((char *)addr.sdn_objname, "X$X%d", port);
183 addr.sdn_objnamel = strlen((char *)addr.sdn_objname);
186 fd = socket(PF_DECnet, SOCK_STREAM, 0);
190 memset(&accessdata, 0, sizeof(accessdata));
191 sprintf((char*)accessdata.acc_acc, "%d", getuid());
192 accessdata.acc_accl = strlen((char *)accessdata.acc_acc);
193 setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
195 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
201 static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port)
204 struct addrinfo hints = { 0
208 #ifdef AI_NUMERICSERV
211 , AF_UNSPEC, SOCK_STREAM };
212 char service[6]; /* "65535" with the trailing '\0' */
213 struct addrinfo *results, *addr;
216 if (protocol && strcmp("tcp",protocol))
219 /* Allow IPv6 addresses enclosed in brackets. */
220 if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
224 hints.ai_flags |= AI_NUMERICHOST;
225 hints.ai_family = AF_INET6;
228 snprintf(service, sizeof(service), "%hu", port);
229 if(getaddrinfo(host, service, &hints, &results))
230 /* FIXME: use gai_strerror, and fill in error connection */
233 for(addr = results; addr; addr = addr->ai_next)
235 fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
236 if(fd >= 0 && connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
240 freeaddrinfo(results);
244 static int _xcb_open_unix(char *protocol, const char *file)
247 struct sockaddr_un addr = { AF_UNIX };
249 if (protocol && strcmp("unix",protocol))
252 strcpy(addr.sun_path, file);
254 fd = socket(AF_UNIX, SOCK_STREAM, 0);
257 if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
262 xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
268 xcb_auth_info_t auth;
270 if(!_xcb_parse_display(displayname, &host, &protocol, &display, screenp))
271 return (xcb_connection_t *) &error_connection;
272 fd = _xcb_open(host, protocol, display);
275 return (xcb_connection_t *) &error_connection;
277 if(_xcb_get_auth_info(fd, &auth, display))
279 c = xcb_connect_to_fd(fd, &auth);
284 c = xcb_connect_to_fd(fd, 0);
288 xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
294 if(!_xcb_parse_display(displayname, &host, &protocol, &display, screenp))
295 return (xcb_connection_t *) &error_connection;
296 fd = _xcb_open(host, protocol, display);
299 return (xcb_connection_t *) &error_connection;
301 return xcb_connect_to_fd(fd, auth);