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IABSD.fr/xenocara/dist/libxcb/src/xcb_util.c
matthieu
- dist/libxcb/src/xcb_util.c
-
/* 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <assert.h> #include <sys/types.h> #include <limits.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <stddef.h> #include <unistd.h> #include <string.h> #ifdef _WIN32 #include "xcb_windefs.h" #else #include <arpa/inet.h> #include <sys/socket.h> #include <sys/un.h> #include <netinet/in.h> #include <netinet/tcp.h> #include <fcntl.h> #include <netdb.h> #endif /* _WIN32 */ #include "xcb.h" #include "xcbext.h" #include "xcbint.h" #if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED) # include <tsol/label.h> # include <sys/stat.h> #endif #ifdef HAVE_LAUNCHD #include <sys/stat.h> #endif 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; } int xcb_sumof(uint8_t *list, int len) { int i, s = 0; for(i=0; i<len; i++) { s += *list; list++; } return s; } #ifdef HAVE_LAUNCHD /* Return true and parse if name matches <path to socket>[.<screen>] * Upon success: * host = <path to socket> * protocol = "unix" * display = 0 * screen = <screen> */ static int _xcb_parse_display_path_to_socket(const char *name, char **host, char **protocol, int *displayp, int *screenp) { struct stat sbuf; char path[PATH_MAX]; int _screen = 0; strlcpy(path, name, sizeof(path)); if (0 != stat(path, &sbuf)) { char *dot = strrchr(path, '.'); if (!dot) return 0; *dot = '\0'; if (0 != stat(path, &sbuf)) return 0; _screen = atoi(dot + 1); } if (host) { *host = strdup(path); if (!*host) return 0; } if (protocol) { *protocol = strdup("unix"); if (!*protocol) { if (host) free(*host); return 0; } } if (displayp) *displayp = 0; if (screenp) *screenp = _screen; return 1; } #endif 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; #ifdef HAVE_LAUNCHD /* First check for <path to socket>[.<screen>] */ if (_xcb_parse_display_path_to_socket(name, host, protocol, displayp, screenp)) return 1; #endif 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) goto error_out; len = colon - name; ++colon; display = strtoul(colon, &dot, 10); if(dot == colon) goto error_out; if(*dot == '\0') screen = 0; else { if(*dot != '.') goto error_out; ++dot; screen = strtoul(dot, &end, 10); if(end == dot || *end != '\0') goto error_out; } /* At this point, the display string is fully parsed and valid, but * the caller's memory is untouched. */ *host = malloc(len + 1); if(!*host) goto error_out; memcpy(*host, name, len); (*host)[len] = '\0'; *displayp = display; if(screenp) *screenp = screen; return 1; error_out: if (protocol) { free(*protocol); *protocol = NULL; } return 0; } 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(const char *host, char *protocol, const unsigned short port); #ifndef _WIN32 static int _xcb_open_unix(char *protocol, const char *file); #endif /* !WIN32 */ #ifdef HAVE_ABSTRACT_SOCKETS static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen); #endif static int _xcb_open(const char *host, char *protocol, const int display) { int fd; #ifdef __hpux static const char unix_base[] = "/usr/spool/sockets/X11/"; #else static const char unix_base[] = "/tmp/.X11-unix/X"; #endif const char *base = unix_base; size_t filelen; char *file = NULL; int actual_filelen; /* If protocol or host is "unix", fall through to Unix socket code below */ if ((!protocol || (strcmp("unix",protocol) != 0)) && (*host != '\0') && (strcmp("unix",host) != 0)) { /* display specifies TCP */ unsigned short port = X_TCP_PORT + display; return _xcb_open_tcp(host, protocol, port); } #ifndef _WIN32 #if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED) /* Check special path for Unix sockets under Solaris Trusted Extensions */ if (is_system_labeled()) { struct stat sbuf; const char *tsol_base = "/var/tsol/doors/.X11-unix/X"; char tsol_socket[PATH_MAX]; snprintf(tsol_socket, sizeof(tsol_socket), "%s%d", tsol_base, display); if (stat(tsol_socket, &sbuf) == 0) base = tsol_base; } #endif #ifdef HAVE_LAUNCHD struct stat sbuf; if (0 == stat(host, &sbuf)) { file = strdup(host); if(file == NULL) return -1; filelen = actual_filelen = strlen(file); } else #endif { filelen = strlen(base) + 1 + sizeof(display) * 3 + 1; file = malloc(filelen); if(file == NULL) return -1; /* display specifies Unix socket */ actual_filelen = snprintf(file, filelen, "%s%d", base, display); } if(actual_filelen < 0) { free(file); return -1; } /* snprintf may truncate the file */ filelen = MIN(actual_filelen, filelen - 1); #ifdef HAVE_ABSTRACT_SOCKETS fd = _xcb_open_abstract(protocol, file, filelen); if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED)) { free(file); return fd; } #endif fd = _xcb_open_unix(protocol, file); free(file); if (fd < 0 && !protocol && *host == '\0') { unsigned short port = X_TCP_PORT + display; fd = _xcb_open_tcp(host, protocol, port); } return fd; #endif /* !_WIN32 */ return -1; /* if control reaches here then something has gone wrong */ } static int _xcb_socket(int family, int type, int proto) { int fd; #ifdef SOCK_CLOEXEC fd = socket(family, type | SOCK_CLOEXEC, proto); if (fd == -1 && errno == EINVAL) #endif { fd = socket(family, type, proto); #ifndef _WIN32 if (fd >= 0) fcntl(fd, F_SETFD, FD_CLOEXEC); #endif } return fd; } static int _xcb_do_connect(int fd, const struct sockaddr* addr, int addrlen) { int on = 1; if(fd < 0) return -1; setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)); return connect(fd, addr, addrlen); } static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port) { int fd = -1; #if HAVE_GETADDRINFO struct addrinfo hints; char service[6]; /* "65535" with the trailing '\0' */ struct addrinfo *results, *addr; char *bracket; #endif if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol) #ifdef AF_INET6 && strcmp("inet6",protocol) #endif ) return -1; if (*host == '\0') host = "localhost"; #if HAVE_GETADDRINFO memset(&hints, 0, sizeof(hints)); #ifdef AI_NUMERICSERV hints.ai_flags |= AI_NUMERICSERV; #endif hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; #ifdef AF_INET6 /* 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; } #endif 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 = _xcb_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); if (_xcb_do_connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0) break; close(fd); fd = -1; } freeaddrinfo(results); return fd; #else { struct hostent* _h; struct sockaddr_in _s; struct in_addr ** _c; if((_h = gethostbyname(host)) == NULL) return -1; _c = (struct in_addr**)_h->h_addr_list; fd = -1; while(*_c) { _s.sin_family = AF_INET; _s.sin_port = htons(port); _s.sin_addr = *(*_c); fd = _xcb_socket(_s.sin_family, SOCK_STREAM, 0); if(_xcb_do_connect(fd, (struct sockaddr*)&_s, sizeof(_s)) >= 0) break; close(fd); fd = -1; ++_c; } return fd; } #endif } #ifndef _WIN32 static int _xcb_open_unix(char *protocol, const char *file) { int fd; struct sockaddr_un addr; socklen_t len = sizeof(int); int val; if (protocol && strcmp("unix",protocol)) return -1; strcpy(addr.sun_path, file); addr.sun_family = AF_UNIX; #ifdef HAVE_SOCKADDR_SUN_LEN addr.sun_len = SUN_LEN(&addr); #endif fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0); if(fd == -1) return -1; if(getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) == 0 && val < 64 * 1024) { val = 64 * 1024; setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof(int)); } if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) { close(fd); return -1; } return fd; } #endif /* !_WIN32 */ #ifdef HAVE_ABSTRACT_SOCKETS static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen) { int fd; struct sockaddr_un addr = {0}; socklen_t namelen; if (protocol && strcmp("unix",protocol)) return -1; strcpy(addr.sun_path + 1, file); addr.sun_family = AF_UNIX; namelen = offsetof(struct sockaddr_un, sun_path) + 1 + filelen; #ifdef HAVE_SOCKADDR_SUN_LEN addr.sun_len = 1 + filelen; #endif fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0); if (fd == -1) return -1; if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) { close(fd); return -1; } return fd; } #endif xcb_connection_t *xcb_connect(const char *displayname, int *screenp) { return xcb_connect_to_display_with_auth_info(displayname, NULL, screenp); } 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 = NULL; char *protocol = NULL; xcb_auth_info_t ourauth; xcb_connection_t *c; int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp); if(!parsed) { c = _xcb_conn_ret_error(XCB_CONN_CLOSED_PARSE_ERR); goto out; } #ifdef _WIN32 WSADATA wsaData; if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) { c = _xcb_conn_ret_error(XCB_CONN_ERROR); goto out; } #endif fd = _xcb_open(host, protocol, display); if(fd == -1) { c = _xcb_conn_ret_error(XCB_CONN_ERROR); #ifdef _WIN32 WSACleanup(); #endif goto out; } if(auth) { c = xcb_connect_to_fd(fd, auth); goto out; } if(_xcb_get_auth_info(fd, &ourauth, display)) { c = xcb_connect_to_fd(fd, &ourauth); free(ourauth.name); free(ourauth.data); } else c = xcb_connect_to_fd(fd, 0); if(c->has_error) goto out; /* Make sure requested screen number is in bounds for this server */ if((screenp != NULL) && (*screenp >= (int) c->setup->roots_len)) { xcb_disconnect(c); c = _xcb_conn_ret_error(XCB_CONN_CLOSED_INVALID_SCREEN); goto out; } out: free(host); free(protocol); return c; }