Import Upstream version 1.9.0

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Giacomo Catenazzi committed 2019-04-29 15:42:59 +02:00
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include_HEADERS= g15daemon_client.h
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/*
This file is part of g15daemon.
g15daemon is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
g15daemon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with g15daemon; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
(c) 2006 Mike Lampard, Philip Lawatsch, and others
$Revision: 240 $ - $Date: 2007-01-04 02:35:38 +1030 (Thu, 04 Jan 2007) $ $Author: mlampard $
This daemon listens on localhost port 15550 for client connections,
and arbitrates LCD display. Allows for multiple simultaneous clients.
Client screens can be cycled through by pressing the 'L1' key.
*/
#ifdef __cplusplus
extern "C"
{
#endif
#define G15_WIDTH 160
#define G15_HEIGHT 43
#define G15_BUFSIZE 6880
#define G15DAEMON_VERSION g15daemon_version()
#define G15_PIXELBUF 0
#define G15_TEXTBUF 1
#define G15_WBMPBUF 2
#define G15_G15RBUF 3
/* client / server commands - see README.devel for details on use */
#define G15DAEMON_KEY_HANDLER 0x10
#define G15DAEMON_MKEYLEDS 0x20
#define G15DAEMON_CONTRAST 0x40
#define G15DAEMON_BACKLIGHT 0x80
#define G15DAEMON_KB_BACKLIGHT 0x8
#define G15DAEMON_GET_KEYSTATE 'k'
#define G15DAEMON_SWITCH_PRIORITIES 'p'
#define G15DAEMON_IS_FOREGROUND 'v'
#define G15DAEMON_IS_USER_SELECTED 'u'
const char *g15daemon_version();
/* open a new connection to the g15daemon. returns an fd to be used with g15_send & g15_recv */
/* screentype should be either 0 (graphic/pixelbuffer) or 1 (textbuffer). only Graphic buffers are
supported in this version */
int new_g15_screen(int screentype);
/* close connection - just calls close() */
int g15_close_screen(int sock);
/* these two functions operate in the same way as send & recv, except they wont return
* until _all_ len bytes are sent or received, or an error occurs */
int g15_send(int sock, char *buf, unsigned int len);
int g15_recv(int sock, char *buf, unsigned int len);
/* send a command (defined above) to the daemon. any replies from the daemon are returned */
int g15_send_cmd (int sock, unsigned char command, unsigned char value);
/* receive an oob byte from the daemon, used internally by g15_send_cmd, but useful elsewhere */
#define G15_FOREGROUND_SENT_OOB 1
int g15_recv_oob_answer(int sock);
#ifdef __cplusplus
}
#endif
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/*
This file is part of g15daemon.
g15daemon is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
g15daemon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with g15daemon; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
(c) 2006 Mike Lampard, Philip Lawatsch, and others
$Revision: 244 $ - $Date: 2007-01-05 08:04:05 +1030 (Fri, 05 Jan 2007) $ $Author: mlampard $
This daemon listens on localhost port 15550 for client connections,
and arbitrates LCD display. Allows for multiple simultaneous clients.
Client screens can be cycled through by pressing the 'L1' key.
*/
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <poll.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <config.h>
#include <libg15.h>
#include "g15daemon_client.h"
#define G15SERVER_PORT 15550
#define G15SERVER_ADDR "127.0.0.1"
int leaving = 0;
const char *g15daemon_version () {
return VERSION;
}
int new_g15_screen(int screentype)
{
int g15screen_fd;
struct sockaddr_in serv_addr;
/* raise the priority of our packets */
int tos = 0x6;
char buffer[256];
g15screen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (g15screen_fd < 0)
return -1;
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
inet_aton (G15SERVER_ADDR, &serv_addr.sin_addr);
serv_addr.sin_port = htons(G15SERVER_PORT);
if (connect(g15screen_fd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
return -1;
setsockopt(g15screen_fd, SOL_SOCKET, SO_PRIORITY, &tos, sizeof(tos));
if (fcntl(g15screen_fd, F_SETFL, O_NONBLOCK) <0 ) {
}
memset(buffer,0,256);
if(g15_recv(g15screen_fd, buffer, 16)<0)
return -1;
/* here we check that we're really talking to the g15daemon */
if(strcmp(buffer,"G15 daemon HELLO") != 0)
return -1;
if(screentype == G15_TEXTBUF) /* txt buffer - not supported yet */
g15_send(g15screen_fd,"TBUF",4);
else if(screentype == G15_WBMPBUF) /* wbmp buffer */
g15_send(g15screen_fd,"WBUF",4);
else if(screentype == G15_G15RBUF)
g15_send(g15screen_fd,"RBUF",4);
else
g15_send(g15screen_fd,"GBUF",4);
return g15screen_fd;
}
int g15_close_screen(int sock)
{
return close(sock);
}
int g15_send(int sock, char *buf, unsigned int len)
{
int total = 0;
int retval = 0;
int bytesleft = len;
struct pollfd pfd[1];
while(total < len && !leaving) {
memset(pfd,0,sizeof(pfd));
pfd[0].fd = sock;
pfd[0].events = POLLOUT|POLLERR|POLLHUP|POLLNVAL;
if(poll(pfd,1,500)>=0) {
if(pfd[0].revents & POLLOUT && !(pfd[0].revents & POLLERR || pfd[0].revents & POLLHUP || pfd[0].revents & POLLNVAL) ) {
retval = send(sock, buf+total, bytesleft, MSG_DONTWAIT);
if (retval == -1) {
break;
}
bytesleft -= retval;
total += retval;
}
if((pfd[0].revents & POLLERR|| pfd[0].revents & POLLHUP || pfd[0].revents & POLLNVAL)){
retval=-1;
break;
}
}
}
return retval==-1?-1:0;
}
int g15_recv(int sock, char *buf, unsigned int len)
{
int total = 0;
int retval = 0;
int bytesleft = len;
struct pollfd pfd[1];
while(total < len && !leaving) {
memset(pfd,0,sizeof(pfd));
pfd[0].fd = sock;
pfd[0].events = POLLIN;
if(poll(pfd,1,500)>0){
if(pfd[0].revents & POLLIN) {
retval = recv(sock, buf+total, bytesleft, 0);
if (retval < 1) {
break;
}
total += retval;
bytesleft -= retval;
}
}
}
return total;
}
/* receive a byte from a priority, out-of-band packet */
int g15_recv_oob_answer(int sock) {
int packet[2];
int msgret = 0;
struct pollfd pfd[1];
memset(pfd,0,sizeof(pfd));
memset(packet,0,2);
pfd[0].fd = sock;
pfd[0].events = POLLPRI | POLLERR | POLLHUP | POLLNVAL;
if(poll(pfd,1,100)>0){
if(pfd[0].revents & POLLPRI && !(pfd[0].revents & POLLERR || pfd[0].revents & POLLHUP || pfd[0].revents & POLLNVAL)) {
memset(packet,0,sizeof(packet));
msgret = recv(sock, packet, 10 , MSG_OOB);
if (msgret < 1) {
return -1;
}
}
}
return packet[0];
}
int g15_send_cmd (int sock, unsigned char command, unsigned char value)
{
int retval;
unsigned char packet[2];
switch (command) {
case G15DAEMON_KEY_HANDLER:
if (value > G15_LED_MR)
value = G15_LED_MR;
packet[0] = (unsigned char)command | (unsigned char)value;
retval = send( sock, packet, 1, MSG_OOB );
break;
case G15DAEMON_CONTRAST:
if (value > G15_CONTRAST_HIGH)
value = G15_CONTRAST_HIGH;
packet[0] = (unsigned char)command | (unsigned char)value;
send( sock, packet, 1, MSG_OOB );
retval = g15_recv_oob_answer(sock);
break;
case G15DAEMON_BACKLIGHT:
if (value > G15_BRIGHTNESS_BRIGHT)
value = G15_BRIGHTNESS_BRIGHT;
packet[0] = (unsigned char)command | (unsigned char)value;
send( sock, packet, 1, MSG_OOB );
retval = g15_recv_oob_answer(sock);
break;
case G15DAEMON_KB_BACKLIGHT:
if (value > G15_BRIGHTNESS_BRIGHT)
value = G15_BRIGHTNESS_BRIGHT;
packet[0] = (unsigned char)command | (unsigned char)value;
retval = send( sock, packet, 1, MSG_OOB );
break;
case G15DAEMON_MKEYLEDS:
packet[0] = (unsigned char)command|(unsigned char)value;
retval = send( sock, packet, 1, MSG_OOB );
break;
case G15DAEMON_SWITCH_PRIORITIES:
packet[0] = (unsigned char)command;
retval = send( sock, packet, 1, MSG_OOB );
break;
case G15DAEMON_GET_KEYSTATE:{
retval = 0;
packet[0] = (unsigned char)command;
send( sock, packet, 1, MSG_OOB );
recv(sock, &retval, sizeof(retval),0);
break;
}
case G15DAEMON_IS_FOREGROUND:{
packet[0] = (unsigned char)command;
send( sock, packet, 1, MSG_OOB );
retval = g15_recv_oob_answer(sock) - 48;
break;
}
case G15DAEMON_IS_USER_SELECTED:{
packet[0] = (unsigned char)command;
send( sock, packet, 1, MSG_OOB );
retval = g15_recv_oob_answer(sock) - 48;
break;
}
default:
return -1;
}
return retval;
}