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/* 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)
{
unsigned long y;
y = (mask >> 1) & 033333333333;
y = mask - y - ((y >> 1) & 033333333333);
return ((y + (y >> 3)) & 030707070707) % 077;
}
int xcb_parse_display(const char *name, char **host, int *displayp, int *screenp)
{
int len, display, screen;
char *colon, *dot, *end;
if(!name || !*name)
name = getenv("DISPLAY");
if(!name)
return 0;
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;
}
static int _xcb_open_tcp(const char *host, const unsigned short port);
static int _xcb_open_unix(const char *file);
#ifdef DNETCONN
static int _xcb_open_decnet(const char *host, const unsigned short port);
#endif
static int _xcb_open(const char *host, const int display)
{
int fd;
if(*host)
{
#ifdef DNETCONN
if (strchr(host, ':'))
{
/* DECnet displays have two colons, so the parser will have left
one at the end */
char *dnethost = strdup(host);
dnethost[strlen(dnethost)-1] = '\0';
fd = _xcb_open_decnet(dnethost, display);
free(dnethost);
}
else
#endif
{
/* display specifies TCP */
unsigned short port = X_TCP_PORT + display;
fd = _xcb_open_tcp(host, port);
}
}
else
{
/* display specifies Unix socket */
static const char base[] = "/tmp/.X11-unix/X";
char file[sizeof(base) + 20];
snprintf(file, sizeof(file), "%s%d", base, display);
fd = _xcb_open_unix(file);
}
return fd;
}
#ifdef DNETCONN
static int _xcb_open_decnet(const char *host, const unsigned short port)
{
int fd;
struct sockaddr_dn addr;
struct accessdata_dn accessdata;
struct nodeent *nodeaddr = getnodebyname(host);
if(!nodeaddr)
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(const char *host, const unsigned short port)
{
int fd;
struct sockaddr_in addr;
struct hostent *hostaddr = gethostbyname(host);
if(!hostaddr)
return -1;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
memcpy(&addr.sin_addr, hostaddr->h_addr_list[0], sizeof(addr.sin_addr));
fd = socket(PF_INET, SOCK_STREAM, 0);
if(fd == -1)
return -1;
if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
return -1;
return fd;
}
static int _xcb_open_unix(const char *file)
{
int fd;
struct sockaddr_un addr = { AF_UNIX };
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;
xcb_connection_t *c;
xcb_auth_info_t auth;
if(!xcb_parse_display(displayname, &host, &display, screenp))
return (xcb_connection_t *) &error_connection;
fd = _xcb_open(host, display);
free(host);
if(fd == -1)
return (xcb_connection_t *) &error_connection;
_xcb_get_auth_info(fd, &auth);
c = xcb_connect_to_fd(fd, &auth);
free(auth.name);
free(auth.data);
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;
if(!xcb_parse_display(displayname, &host, &display, screenp))
return (xcb_connection_t *) &error_connection;
fd = _xcb_open(host, display);
free(host);
if(fd == -1)
return (xcb_connection_t *) &error_connection;
return xcb_connect_to_fd(fd, auth);
}
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