aboutsummaryrefslogtreecommitdiff
path: root/libxcb/src/xcb_util.c
diff options
context:
space:
mode:
Diffstat (limited to 'libxcb/src/xcb_util.c')
-rw-r--r--libxcb/src/xcb_util.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/libxcb/src/xcb_util.c b/libxcb/src/xcb_util.c
new file mode 100644
index 000000000..dd2305abd
--- /dev/null
+++ b/libxcb/src/xcb_util.c
@@ -0,0 +1,302 @@
+/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the names of the authors or their
+ * institutions shall not be used in advertising or otherwise to promote the
+ * sale, use or other dealings in this Software without prior written
+ * authorization from the authors.
+ */
+
+/* Utility functions implementable using only public APIs. */
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#ifdef DNETCONN
+#include <netdnet/dnetdb.h>
+#include <netdnet/dn.h>
+#endif
+#include <netdb.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "xcb.h"
+#include "xcbext.h"
+#include "xcbint.h"
+
+static const int error_connection = 1;
+
+int xcb_popcount(uint32_t mask)
+{
+ uint32_t y;
+ y = (mask >> 1) & 033333333333;
+ y = mask - y - ((y >> 1) & 033333333333);
+ return ((y + (y >> 3)) & 030707070707) % 077;
+}
+
+static int _xcb_parse_display(const char *name, char **host, char **protocol,
+ int *displayp, int *screenp)
+{
+ int len, display, screen;
+ char *slash, *colon, *dot, *end;
+ if(!name || !*name)
+ name = getenv("DISPLAY");
+ if(!name)
+ return 0;
+ slash = strrchr(name, '/');
+ if (slash) {
+ len = slash - name;
+ if (protocol) {
+ *protocol = malloc(len + 1);
+ if(!*protocol)
+ return 0;
+ memcpy(*protocol, name, len);
+ (*protocol)[len] = '\0';
+ }
+ name = slash + 1;
+ } else
+ if (protocol)
+ *protocol = NULL;
+
+ colon = strrchr(name, ':');
+ if(!colon)
+ return 0;
+ len = colon - name;
+ ++colon;
+ display = strtoul(colon, &dot, 10);
+ if(dot == colon)
+ return 0;
+ if(*dot == '\0')
+ screen = 0;
+ else
+ {
+ if(*dot != '.')
+ return 0;
+ ++dot;
+ screen = strtoul(dot, &end, 10);
+ if(end == dot || *end != '\0')
+ return 0;
+ }
+ /* At this point, the display string is fully parsed and valid, but
+ * the caller's memory is untouched. */
+
+ *host = malloc(len + 1);
+ if(!*host)
+ return 0;
+ memcpy(*host, name, len);
+ (*host)[len] = '\0';
+ *displayp = display;
+ if(screenp)
+ *screenp = screen;
+ return 1;
+}
+
+int xcb_parse_display(const char *name, char **host, int *displayp,
+ int *screenp)
+{
+ return _xcb_parse_display(name, host, NULL, displayp, screenp);
+}
+
+static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port);
+static int _xcb_open_unix(char *protocol, const char *file);
+#ifdef DNETCONN
+static int _xcb_open_decnet(const char *host, char *protocol, const unsigned short port);
+#endif
+
+static int _xcb_open(char *host, char *protocol, const int display)
+{
+ int fd;
+ static const char base[] = "/tmp/.X11-unix/X";
+ char file[sizeof(base) + 20];
+
+ if(*host)
+ {
+#ifdef DNETCONN
+ /* DECnet displays have two colons, so _xcb_parse_display will have
+ left one at the end. However, an IPv6 address can end with *two*
+ colons, so only treat this as a DECnet display if host ends with
+ exactly one colon. */
+ char *colon = strchr(host, ':');
+ if(colon && *(colon+1) == '\0')
+ {
+ *colon = '\0';
+ return _xcb_open_decnet(host, protocol, display);
+ }
+ else
+#endif
+ if (protocol
+ || strcmp("unix",host)) { /* follow the old unix: rule */
+
+ /* display specifies TCP */
+ unsigned short port = X_TCP_PORT + display;
+ return _xcb_open_tcp(host, protocol, port);
+ }
+ }
+
+ /* display specifies Unix socket */
+ snprintf(file, sizeof(file), "%s%d", base, display);
+ return _xcb_open_unix(protocol, file);
+
+
+ return fd;
+}
+
+#ifdef DNETCONN
+static int _xcb_open_decnet(const char *host, const char *protocol, const unsigned short port)
+{
+ int fd;
+ struct sockaddr_dn addr;
+ struct accessdata_dn accessdata;
+ struct nodeent *nodeaddr = getnodebyname(host);
+
+ if(!nodeaddr)
+ return -1;
+ if (protocol && strcmp("dnet",protocol))
+ return -1;
+ addr.sdn_family = AF_DECnet;
+
+ addr.sdn_add.a_len = nodeaddr->n_length;
+ memcpy(addr.sdn_add.a_addr, nodeaddr->n_addr, addr.sdn_add.a_len);
+
+ sprintf((char *)addr.sdn_objname, "X$X%d", port);
+ addr.sdn_objnamel = strlen((char *)addr.sdn_objname);
+ addr.sdn_objnum = 0;
+
+ fd = socket(PF_DECnet, SOCK_STREAM, 0);
+ if(fd == -1)
+ return -1;
+
+ memset(&accessdata, 0, sizeof(accessdata));
+ sprintf((char*)accessdata.acc_acc, "%d", getuid());
+ accessdata.acc_accl = strlen((char *)accessdata.acc_acc);
+ setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
+
+ if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
+ return -1;
+ return fd;
+}
+#endif
+
+static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port)
+{
+ int fd = -1;
+ struct addrinfo hints = { 0
+#ifdef AI_ADDRCONFIG
+ | AI_ADDRCONFIG
+#endif
+#ifdef AI_NUMERICSERV
+ | AI_NUMERICSERV
+#endif
+ , AF_UNSPEC, SOCK_STREAM };
+ char service[6]; /* "65535" with the trailing '\0' */
+ struct addrinfo *results, *addr;
+ char *bracket;
+
+ if (protocol && strcmp("tcp",protocol))
+ return -1;
+
+ /* Allow IPv6 addresses enclosed in brackets. */
+ if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
+ {
+ *bracket = '\0';
+ ++host;
+ hints.ai_flags |= AI_NUMERICHOST;
+ hints.ai_family = AF_INET6;
+ }
+
+ snprintf(service, sizeof(service), "%hu", port);
+ if(getaddrinfo(host, service, &hints, &results))
+ /* FIXME: use gai_strerror, and fill in error connection */
+ return -1;
+
+ for(addr = results; addr; addr = addr->ai_next)
+ {
+ fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
+ if(fd >= 0 && connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
+ break;
+ fd = -1;
+ }
+ freeaddrinfo(results);
+ return fd;
+}
+
+static int _xcb_open_unix(char *protocol, const char *file)
+{
+ int fd;
+ struct sockaddr_un addr = { AF_UNIX };
+
+ if (protocol && strcmp("unix",protocol))
+ return -1;
+
+ strcpy(addr.sun_path, file);
+
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if(fd == -1)
+ return -1;
+ if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
+ return -1;
+ return fd;
+}
+
+xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
+{
+ int fd, display = 0;
+ char *host;
+ char *protocol;
+ xcb_connection_t *c;
+ xcb_auth_info_t auth;
+
+ if(!_xcb_parse_display(displayname, &host, &protocol, &display, screenp))
+ return (xcb_connection_t *) &error_connection;
+ fd = _xcb_open(host, protocol, display);
+ free(host);
+ if(fd == -1)
+ return (xcb_connection_t *) &error_connection;
+
+ if(_xcb_get_auth_info(fd, &auth, display))
+ {
+ c = xcb_connect_to_fd(fd, &auth);
+ free(auth.name);
+ free(auth.data);
+ }
+ else
+ c = xcb_connect_to_fd(fd, 0);
+ return c;
+}
+
+xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
+{
+ int fd, display = 0;
+ char *host;
+ char *protocol;
+
+ if(!_xcb_parse_display(displayname, &host, &protocol, &display, screenp))
+ return (xcb_connection_t *) &error_connection;
+ fd = _xcb_open(host, protocol, display);
+ free(host);
+ if(fd == -1)
+ return (xcb_connection_t *) &error_connection;
+
+ return xcb_connect_to_fd(fd, auth);
+}