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/* See LICENSE file for copyright and license details. */
#include "common.h"
static int
connect_tcp_ip(const char *host, int display)
{
uint16_t port = libaxl_get_tcp_port(display);
int fd;
abort(); /* TODO */
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &(int){1}, sizeof(int));
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &(int){1}, sizeof(int));
return -1;
}
static int
connect_unix(const char *path)
{
struct sockaddr_un addr;
int fd;
fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (fd < 0) {
liberror_save_backtrace(NULL);
liberror_set_error_errno(strerror(errno), "socket", errno);
return -1;
}
if (strlen(path) >= sizeof(addr.sun_path)) {
liberror_save_backtrace(NULL);
/* We could fix this with an O_PATH fd to the file,
* but we will not as other libraries probably do
* not do that, and there is something very wrong
* with your setup if the name is too long for
* `struct sockaddr_un`. */
close(fd);
errno = ENAMETOOLONG;
liberror_set_error_errno("Path to X display socket is too long", "libaxl_connect_without_handshake", ENAMETOOLONG);
return -1;
}
addr.sun_family = AF_LOCAL;
stpcpy(addr.sun_path, path);
if (connect(fd, (void *)&addr, (socklen_t)sizeof(addr))) {
liberror_save_backtrace(NULL);
liberror_set_error_errno(strerror(errno), "connect", errno);
return -1;
}
return fd;
}
LIBAXL_CONNECTION *
libaxl_connect_without_handshake(const char *host, const char *protocol, int display, int screen)
{
LIBAXL_CONNECTION *conn;
char path[sizeof("/tmp/.X11-unix/X-") + 3 * sizeof(int)];
int fd;
if ((!protocol || !*protocol) && (!host || !*host)) {
sprintf(path, "/tmp/.X11-unix/X%i", display);
fd = connect_unix(path);
/* TODO also try abstract address version with a NUL byte before it (truncate address to remove tailing NULs) */
if (fd < 0) {
fd = connect_tcp_ip("localhost", display);
if (fd >= 0)
liberror_pop_error();
}
} else if (!protocol || !*protocol ||
!strcasecmp(protocol, "tcp") || !strcasecmp(protocol, "inet") ||
!strcasecmp(protocol, "tcp6") || !strcasecmp(protocol, "inet6")) {
fd = connect_tcp_ip(host, display);
} else if (!strcmp(protocol, "unix")) {
fd = connect_unix(host);
} else {
liberror_save_backtrace(NULL);
liberror_set_error("Display server uses unsupported underlaying protocol",
"libaxl_connect_without_handshake", "libaxl", LIBAXL_ERROR_PROTOCOL_NOT_SUPPORTED);
return NULL;
}
if (fd < 0)
return NULL;
conn = libaxl_create(fd);
if (conn)
conn->info.default_screen_number = screen < 0 ? 0 : screen;
return conn;
}
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