diff options
Diffstat (limited to 'libxcb/src/xcb_util.c')
| -rw-r--r-- | libxcb/src/xcb_util.c | 302 |
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); +} |