#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <limits.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <netinet/tcp.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 <stddef.h>
#include <unistd.h>
#include <fcntl.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;
#ifdef HAVE_LAUNCHD
if(strncmp(name, "/tmp/launch", 11) == 0)
slash = NULL;
else
#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;
}
*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);
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
#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;
static const char unix_base[] = "/tmp/.X11-unix/X";
const char *base = unix_base;
size_t filelen;
char *file = NULL;
int actual_filelen;
#ifdef HAVE_LAUNCHD
if(strncmp(host, "/tmp/launch", 11) == 0) {
base = host;
host = "";
protocol = NULL;
}
#endif
if(*host || protocol)
{
#ifdef DNETCONN
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)) {
unsigned short port = X_TCP_PORT + display;
return _xcb_open_tcp(host, protocol, port);
}
}
filelen = strlen(base) + 1 + sizeof(display) * 3 + 1;
file = malloc(filelen);
if(file == NULL)
return -1;
#ifdef HAVE_LAUNCHD
if(strncmp(base, "/tmp/launch", 11) == 0)
actual_filelen = snprintf(file, filelen, "%s:%d", base, display);
else
#endif
actual_filelen = snprintf(file, filelen, "%s%d", base, display);
if(actual_filelen < 0)
{
free(file);
return -1;
}
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);
return fd;
}
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);
if (fd >= 0)
fcntl(fd, F_SETFD, FD_CLOEXEC);
}
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);
addr.sdn_objnamel = sprintf((char *)addr.sdn_objname, "X$X%d", port);
if(addr.sdn_objnamel < 0)
return -1;
addr.sdn_objnum = 0;
fd = _xcb_socket(PF_DECnet, SOCK_STREAM, 0);
if(fd == -1)
return -1;
memset(&accessdata, 0, sizeof(accessdata));
accessdata.acc_accl = sprintf((char*)accessdata.acc_acc, "%d", getuid());
if(accessdata.acc_accl < 0)
return -1;
setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
close(fd);
return -1;
}
return fd;
}
#endif
static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port)
{
int fd = -1;
struct addrinfo hints;
char service[6];
struct addrinfo *results, *addr;
char *bracket;
if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol)
#ifdef AF_INET6
&& strcmp("inet6",protocol)
#endif
)
return -1;
if (*host == '\0')
host = "localhost";
memset(&hints, 0, sizeof(hints));
#ifdef AI_ADDRCONFIG
hints.ai_flags |= AI_ADDRCONFIG;
#endif
#ifdef AI_NUMERICSERV
hints.ai_flags |= AI_NUMERICSERV;
#endif
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
#ifdef AF_INET6
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))
return -1;
for(addr = results; addr; addr = addr->ai_next)
{
fd = _xcb_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
if(fd >= 0) {
int on = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
break;
close(fd);
fd = -1;
}
}
freeaddrinfo(results);
return fd;
}
static int _xcb_open_unix(char *protocol, const char *file)
{
int fd;
struct sockaddr_un addr;
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(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
close(fd);
return -1;
}
return fd;
}
#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_connection_t *) &error_connection;
goto out;
} else
fd = _xcb_open(host, protocol, display);
if(fd == -1) {
c = (xcb_connection_t *) &error_connection;
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);
out:
free(host);
free(protocol);
return c;
}