[hmcfgusb] / hmland.c

/* HM-CFG-LAN emulation for HM-CFG-USB
 *
 * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
 *
 * 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 OR COPYRIGHT HOLDERS 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <poll.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libusb-1.0/libusb.h>

#include "hexdump.h"
#include "hmcfgusb.h"

#define PID_FILE "/var/run/hmland.pid"

extern char *optarg;

static int impersonate_hmlanif = 0;
static int debug = 0;
static int verbose = 0;

#define	FLAG_LENGTH_BYTE	(1<<0)
#define	FLAG_FORMAT_HEX		(1<<1)
#define	FLAG_COMMA_BEFORE	(1<<2)
#define	FLAG_COMMA_AFTER	(1<<3)
#define	FLAG_NL			(1<<4)
#define	FLAG_IGNORE_COMMAS	(1<<5)
#define	FLAG_PERIODIC_WAKEUP	(1<<6)

#define CHECK_SPACE(x)		if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
#define CHECK_AVAIL(x)		if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }

static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
{
	const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		'A', 'B', 'C', 'D', 'E', 'F'};
	uint8_t *buf_out = *outpos;
	uint8_t *outend = *outpos + outlen;
	uint8_t *inend = *inpos + inlen;
	int i;

	if (flags & FLAG_COMMA_BEFORE) {
		CHECK_SPACE(1);
		**outpos=',';
		*outpos += 1;
	}

	if (flags & FLAG_LENGTH_BYTE) {
		CHECK_AVAIL(1);
		len = **inpos;
		*inpos += 1;
	}

	if (flags & FLAG_FORMAT_HEX) {
		CHECK_AVAIL(len);
		CHECK_SPACE(len*2);
		for (i = 0; i < len; i++) {
			**outpos = nibble[((**inpos) & 0xf0) >> 4];
			*outpos += 1;
			**outpos = nibble[((**inpos) & 0xf)];
			*inpos += 1; *outpos += 1;
		}
	} else {
		CHECK_AVAIL(len);
		CHECK_SPACE(len);
		memcpy(*outpos, *inpos, len);
		*outpos += len;
		*inpos += len;
	}

	if (flags & FLAG_COMMA_AFTER) {
		CHECK_SPACE(1);
		**outpos=',';
		*outpos += 1;
	}

	if (flags & FLAG_NL) {
		CHECK_SPACE(2);
		**outpos='\r';
		*outpos += 1;
		**outpos='\n';
		*outpos += 1;
	}

	return *outpos - buf_out;
}

static uint8_t ascii_to_nibble(uint8_t a)
{
	uint8_t c = 0x00;

	if ((a >= '0') && (a <= '9')) {
		c = a - '0';
	} else if ((a >= 'A') && (a <= 'F')) {
		c = (a - 'A') + 10;
	} else if ((a >= 'a') && (a <= 'f')) {
		c = (a - 'a') + 10;
	}

	return c;
}

static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
{
	uint8_t *buf_out = *outpos;
	uint8_t *outend = *outpos + outlen;
	uint8_t *inend = *inpos + inlen;

	if (flags & FLAG_LENGTH_BYTE) {
		int len = 0;
		uint8_t *ip;

		ip = *inpos;
		while(ip < inend) {
			if (*ip == ',') {
				ip++;
				if (!(flags & FLAG_IGNORE_COMMAS))
					break;

				continue;
			}
			len++;
			ip++;
		}
		CHECK_SPACE(1);
		**outpos = (len / 2);
		*outpos += 1;
	}

	while(*inpos < inend) {
		if (**inpos == ',') {
			*inpos += 1;
			if (!(flags & FLAG_IGNORE_COMMAS))
				break;

			continue;
		}

		CHECK_SPACE(1);
		CHECK_AVAIL(2);

		**outpos = ascii_to_nibble(**inpos) << 4;
		*inpos += 1;
		**outpos |= ascii_to_nibble(**inpos);
		*inpos += 1; *outpos += 1;
	}

	return *outpos - buf_out;
}

static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
{
	uint8_t out[1024];
	uint8_t *outpos;
	uint8_t *inpos;
	int fd = *((int*)data);
	int w;

	if (buf_len < 1)
		return 1;

	memset(out, 0, sizeof(out));
	outpos = out;
	inpos = buf;

	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
	switch(buf[0]) {
		case 'H':
			if (impersonate_hmlanif) {
				buf[5] = 'L';
				buf[6] = 'A';
				buf[7] = 'N';
			}
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);

			break;
		case 'E':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);

			break;
		case 'R':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);

			break;
		case 'I':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);

			break;
		default:
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
			hexdump(buf, buf_len, "Unknown> ");
			break;
	}
	if (debug)
		fprintf(stderr, "LAN < %s\n", out);

	w = write(fd, out, outpos-out);
	if (w <= 0) {
		perror("write");
		return 0;
	}

	return 1;
}

static int hmlan_parse_in(int fd, void *data)
{
	struct hmcfgusb_dev *dev = data;
	uint8_t buf[1025];
	uint8_t out[0x40]; //FIXME!!!
	uint8_t *outpos;
	uint8_t *inpos;
	int i;
	int last;
	int r;

	memset(buf, 0, sizeof(buf));

	r = read(fd, buf, sizeof(buf)-1);
	if (r > 0) {
		uint8_t *inend = buf + r;

		inpos = buf;

		if (debug)
			fprintf(stderr, "\nLAN > %s", buf);

		while (inpos < inend) {
			uint8_t *instart = inpos;

			if ((*inpos == '\r') || (*inpos == '\n')) {
				inpos++;
				continue;
			}
			
			outpos = out;

			last = inend - inpos;

			for (i = 0; i < last; i++) {
				if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
					last = i;
					break;
				}
			}

			if (last == 0)
				continue;

			memset(out, 0, sizeof(out));
			*outpos++ = *inpos++;

			switch(*instart) {
				case 'S':
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
					break;
				default:
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
					break;
			}

			hmcfgusb_send(dev, out, sizeof(out), 1);
		}
	} else if (r < 0) {
		perror("read");
		return r;
	} else {
		return 0;
	}

	return 1;
}

static int comm(int fd_in, int fd_out, int master_socket, int flags)
{
	struct hmcfgusb_dev *dev;
	uint8_t out[0x40]; //FIXME!!!
	int poll_timeout = 3600;
	int quit = 0;

	hmcfgusb_set_debug(debug);

	dev = hmcfgusb_init(hmlan_format_out, &fd_out);
	if (!dev) {
		fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
		return 0;
	}

	if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
		fprintf(stderr, "Can't add client to pollfd!\n");
		hmcfgusb_close(dev);
		return 0;
	}

	if (master_socket >= 0) {
		if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
			fprintf(stderr, "Can't add master_socket to pollfd!\n");
			hmcfgusb_close(dev);
			return 0;
		}
	}

	if (flags & FLAG_PERIODIC_WAKEUP)
		poll_timeout = 1;

	memset(out, 0, sizeof(out));
	out[0] = 'K';
	hmcfgusb_send_null_frame(dev);
	hmcfgusb_send(dev, out, sizeof(out), 1);

	while(!quit) {
		int fd;

		fd = hmcfgusb_poll(dev, poll_timeout);
		if (fd >= 0) {
			if (fd == master_socket) {
				int client;

				client = accept(master_socket, NULL, 0);
				if (client >= 0) {
					shutdown(client, SHUT_RDWR);
					close(client);
				}
			} else {
				if (hmlan_parse_in(fd, dev) <= 0) {
					quit = 1;
				}
			}
		} else if (fd == -1) {
			if (errno) {
				perror("hmcfgusb_poll");
				quit = 1;
			} else {
				/* periodically wakeup the device */
				hmcfgusb_send_null_frame(dev);
			}
		}
	}

	hmcfgusb_close(dev);
	return 1;
}

void sigterm_handler(int sig)
{
	if (unlink(PID_FILE) == -1)
		perror("Can't remove PID file");

	exit(EXIT_SUCCESS);
}

#define FLAG_DAEMON	(1 << 0)
#define FLAG_PID_FILE	(1 << 1)

static int socket_server(char *iface, int port, int flags)
{
	struct sigaction sact;
	struct sockaddr_in sin;
	int sock;
	int n;
	pid_t pid;

	if (flags & FLAG_DAEMON) {
		FILE *pidfile = NULL;

		if (flags & FLAG_PID_FILE) {
			int fd;

			fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
			if (fd == -1) {
				if (errno == EEXIST) {
					pid_t old_pid;
					pidfile = fopen(PID_FILE, "r");
					if (!pidfile) {
						perror("PID file " PID_FILE " already exists, already running?");
						exit(EXIT_FAILURE);
					}

					if (fscanf(pidfile, "%u", &old_pid) != 1) {
						fclose(pidfile);
						fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
						exit(EXIT_FAILURE);
					}

					fclose(pidfile);

					fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
					exit(EXIT_FAILURE);
				}
				perror("Can't create PID file " PID_FILE);
				exit(EXIT_FAILURE);
			}

			pidfile = fdopen(fd, "w");
			if (!pidfile) {
				perror("Can't reopen PID file fd");
				exit(EXIT_FAILURE);
			}

			memset(&sact, 0, sizeof(sact));
			sact.sa_handler = sigterm_handler;

			if (sigaction(SIGTERM, &sact, NULL) == -1) {
				perror("sigaction(SIGTERM)");
				exit(EXIT_FAILURE);
			}
		}

		pid = fork();
		if (pid > 0) {
			if (pidfile) {
				fprintf(pidfile, "%u\n", pid);
				fclose(pidfile);
			}

			printf("Daemon with PID %u started!\n", pid);
			exit(EXIT_SUCCESS);
		} else if (pid < 0) {
			perror("fork");
			exit(EXIT_FAILURE);
		}

		if (pidfile)
			fclose(pidfile);
	}

	memset(&sact, 0, sizeof(sact));
	sact.sa_handler = SIG_IGN;

	if (sigaction(SIGPIPE, &sact, NULL) == -1) {
		perror("sigaction(SIGPIPE)");
		exit(EXIT_FAILURE);
	}

	impersonate_hmlanif = 1;

	sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (sock == -1) {
		perror("Can't open socket");
		return EXIT_FAILURE;
	}

	n = 1;
	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
		perror("Can't set socket options");
		return EXIT_FAILURE;
	}

	memset(&sin, 0, sizeof(sin));
	sin.sin_family = AF_INET;
	sin.sin_port = htons(port);
	if (!iface) {
		sin.sin_addr.s_addr = htonl(INADDR_ANY);
	} else {
		if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
			perror("inet_ntop");
			return EXIT_FAILURE;
		}
	}

	if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
		perror("Can't bind socket");
		return EXIT_FAILURE;
	}

	if (listen(sock, 1) == -1) {
		perror("Can't listen on socket");
		return EXIT_FAILURE;
	}

	while(1) {
		struct sockaddr_in csin;
		socklen_t csinlen;
		int client;
		in_addr_t client_addr;

		memset(&csin, 0, sizeof(csin));
		csinlen = sizeof(csin);
		client = accept(sock, (struct sockaddr*)&csin, &csinlen);
		if (client == -1) {
			perror("Couldn't accept client");
			continue;
		}

		/* FIXME: getnameinfo... */
		client_addr = ntohl(csin.sin_addr.s_addr);

		if (verbose) {
			printf("Client %d.%d.%d.%d connected!\n",
					(client_addr & 0xff000000) >> 24,
					(client_addr & 0x00ff0000) >> 16,
					(client_addr & 0x0000ff00) >> 8,
					(client_addr & 0x000000ff));
		}

		comm(client, client, sock, flags);

		shutdown(client, SHUT_RDWR);
		close(client);

		if (verbose) {
			printf("Connection to %d.%d.%d.%d closed!\n",
					(client_addr & 0xff000000) >> 24,
					(client_addr & 0x00ff0000) >> 16,
					(client_addr & 0x0000ff00) >> 8,
					(client_addr & 0x000000ff));
		}
		sleep(1);
	}

	return EXIT_SUCCESS;
}

static int interactive_server(int flags)
{
	if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
		return EXIT_FAILURE;

	return EXIT_SUCCESS;
}

void hmlan_syntax(char *prog)
{
	fprintf(stderr, "Syntax: %s options\n\n", prog);
	fprintf(stderr, "Possible options:\n");
	fprintf(stderr, "\t-D\tdebug mode\n");
	fprintf(stderr, "\t-d\tdaemon mode\n");
	fprintf(stderr, "\t-h\tthis help\n");
	fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
	fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
	fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\n");
	fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
	fprintf(stderr, "\t-R\twakeup the device (and USB-bus) every second (fix for e.g. Raspberry Pi)\n");
	fprintf(stderr, "\t-v\tverbose mode\n");

}

int main(int argc, char **argv)
{
	int port = 1000;
	char *iface = NULL;
	int interactive = 0;
	int flags = 0;
	char *ep;
	int opt;

	while((opt = getopt(argc, argv, "DdhiPp:Rl:v")) != -1) {
		switch (opt) {
			case 'D':
				debug = 1;
				verbose = 1;
				break;
			case 'd':
				flags |= FLAG_DAEMON;
				break;
			case 'i':
				interactive = 1;
				break;
			case 'P':
				flags |= FLAG_PID_FILE;
				break;
			case 'p':
				port = strtoul(optarg, &ep, 10);
				if (*ep != '\0') {
					fprintf(stderr, "Can't parse port!\n");
					exit(EXIT_FAILURE);
				}
				break;
			case 'R':
				flags |= FLAG_PERIODIC_WAKEUP;
				break;
			case 'l':
				iface = optarg;
				break;
			case 'v':
				verbose = 1;
				break;
			case 'h':
			case ':':
			case '?':
			default:
				hmlan_syntax(argv[0]);
				exit(EXIT_FAILURE);
				break;
		}
	}
	
	if (interactive) {
		return interactive_server(flags);
	} else {
		return socket_server(iface, port, flags);
	}
}
Commit	Line	Data
4732a863	1	/* HM-CFG-LAN emulation for HM-CFG-USB
9db2e455 MG	2	*
	3	* Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a copy
	6	* of this software and associated documentation files (the "Software"), to
	7	* deal in the Software without restriction, including without limitation the
	8	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	9	* sell copies of the Software, and to permit persons to whom the Software is
	10	* furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice shall be included in
	13	* all copies or substantial portions of the Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	18	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	21	* IN THE SOFTWARE.
	22	*/
	23
	24	#include <stdio.h>
	25	#include <stdlib.h>
	26	#include <unistd.h>
	27	#include <stdint.h>
	28	#include <string.h>
	29	#include <strings.h>
	30	#include <poll.h>
4371275b	31	#include <signal.h>
9db2e455	32	#include <errno.h>
e0a7146e MG	33	#include <sys/types.h>
e0a7146e MG	34	#include <sys/socket.h>
b0bf6ad2	35	#include <sys/stat.h>
e6ab4631	36	#include <fcntl.h>
e0a7146e MG	37	#include <netinet/in.h>
e0a7146e MG	38	#include <arpa/inet.h>
9db2e455 MG	39	#include <libusb-1.0/libusb.h>
	40
	41	#include "hexdump.h"
	42	#include "hmcfgusb.h"
	43
b0bf6ad2 MG	44	#define PID_FILE "/var/run/hmland.pid"
b0bf6ad2 MG	45
627e3f33 MG	46	extern char *optarg;
627e3f33 MG	47
e0a7146e	48	static int impersonate_hmlanif = 0;
627e3f33 MG	49	static int debug = 0;
627e3f33 MG	50	static int verbose = 0;
e0a7146e	51
e75295bb MG	52	#define FLAG_LENGTH_BYTE (1<<0)
	53	#define FLAG_FORMAT_HEX (1<<1)
	54	#define FLAG_COMMA_BEFORE (1<<2)
	55	#define FLAG_COMMA_AFTER (1<<3)
	56	#define FLAG_NL (1<<4)
	57	#define FLAG_IGNORE_COMMAS (1<<5)
23d96b59	58	#define FLAG_PERIODIC_WAKEUP (1<<6)
e75295bb MG	59
	60	#define CHECK_SPACE(x) if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
	61	#define CHECK_AVAIL(x) if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
	62
	63	static int format_part_out(uint8_t inpos, int inlen, uint8_t outpos, int outlen, int len, int flags)
	64	{
51d4ece6 MG	65	const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
51d4ece6 MG	66	'A', 'B', 'C', 'D', 'E', 'F'};
e75295bb MG	67	uint8_t buf_out = outpos;
	68	uint8_t outend = outpos + outlen;
	69	uint8_t inend = inpos + inlen;
	70	int i;
	71
	72	if (flags & FLAG_COMMA_BEFORE) {
	73	CHECK_SPACE(1);
	74	**outpos=',';
	75	*outpos += 1;
	76	}
	77
	78	if (flags & FLAG_LENGTH_BYTE) {
	79	CHECK_AVAIL(1);
	80	len = **inpos;
	81	*inpos += 1;
	82	}
	83
	84	if (flags & FLAG_FORMAT_HEX) {
e75295bb MG	85	CHECK_AVAIL(len);
	86	CHECK_SPACE(len*2);
	87	for (i = 0; i < len; i++) {
51d4ece6 MG	88	outpos = nibble[((inpos) & 0xf0) >> 4];
	89	*outpos += 1;
	90	outpos = nibble[((inpos) & 0xf)];
	91	inpos += 1; outpos += 1;
e75295bb MG	92	}
	93	} else {
	94	CHECK_AVAIL(len);
	95	CHECK_SPACE(len);
	96	memcpy(outpos, inpos, len);
	97	*outpos += len;
	98	*inpos += len;
	99	}
	100
	101	if (flags & FLAG_COMMA_AFTER) {
	102	CHECK_SPACE(1);
	103	**outpos=',';
	104	*outpos += 1;
	105	}
	106
	107	if (flags & FLAG_NL) {
	108	CHECK_SPACE(2);
	109	**outpos='\r';
	110	*outpos += 1;
	111	**outpos='\n';
	112	*outpos += 1;
	113	}
	114
	115	return *outpos - buf_out;
	116	}
	117
51d4ece6 MG	118	static uint8_t ascii_to_nibble(uint8_t a)
	119	{
	120	uint8_t c = 0x00;
	121
	122	if ((a >= '0') && (a <= '9')) {
	123	c = a - '0';
	124	} else if ((a >= 'A') && (a <= 'F')) {
	125	c = (a - 'A') + 10;
	126	} else if ((a >= 'a') && (a <= 'f')) {
	127	c = (a - 'a') + 10;
	128	}
	129
	130	return c;
	131	}
	132
e75295bb MG	133	static int parse_part_in(uint8_t inpos, int inlen, uint8_t outpos, int outlen, int flags)
	134	{
	135	uint8_t buf_out = outpos;
	136	uint8_t outend = outpos + outlen;
	137	uint8_t inend = inpos + inlen;
e75295bb MG	138
	139	if (flags & FLAG_LENGTH_BYTE) {
	140	int len = 0;
	141	uint8_t *ip;
	142
	143	ip = *inpos;
	144	while(ip < inend) {
	145	if (*ip == ',') {
	146	ip++;
	147	if (!(flags & FLAG_IGNORE_COMMAS))
	148	break;
	149
	150	continue;
	151	}
	152	len++;
	153	ip++;
	154	}
	155	CHECK_SPACE(1);
	156	**outpos = (len / 2);
	157	*outpos += 1;
	158	}
	159
	160	while(*inpos < inend) {
	161	if (**inpos == ',') {
	162	*inpos += 1;
	163	if (!(flags & FLAG_IGNORE_COMMAS))
	164	break;
	165
	166	continue;
	167	}
	168
	169	CHECK_SPACE(1);
	170	CHECK_AVAIL(2);
e75295bb	171
51d4ece6 MG	172	outpos = ascii_to_nibble(inpos) << 4;
	173	*inpos += 1;
	174	outpos \|= ascii_to_nibble(inpos);
	175	inpos += 1; outpos += 1;
e75295bb MG	176	}
	177
	178	return *outpos - buf_out;
	179	}
	180
4371275b	181	static int hmlan_format_out(uint8_t buf, int buf_len, void data)
9db2e455	182	{
e75295bb MG	183	uint8_t out[1024];
	184	uint8_t *outpos;
	185	uint8_t *inpos;
e0a7146e	186	int fd = ((int)data);
4371275b	187	int w;
9db2e455 MG	188
9db2e455 MG	189	if (buf_len < 1)
4371275b	190	return 1;
9db2e455	191
e0a7146e	192	memset(out, 0, sizeof(out));
e75295bb MG	193	outpos = out;
e75295bb MG	194	inpos = buf;
e0a7146e	195
e75295bb	196	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
9db2e455 MG	197	switch(buf[0]) {
9db2e455 MG	198	case 'H':
e0a7146e MG	199	if (impersonate_hmlanif) {
	200	buf[5] = 'L';
	201	buf[6] = 'A';
	202	buf[7] = 'N';
	203	}
e75295bb MG	204	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
	205	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	206	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE);
	207	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	208	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	209	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	210	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_NL);
9db2e455 MG	211
	212	break;
	213	case 'E':
e75295bb MG	214	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
	215	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	216	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	217	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	218	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	219	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE \| FLAG_NL);
	220
9db2e455 MG	221	break;
9db2e455 MG	222	case 'R':
e75295bb MG	223	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
	224	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	225	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	226	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	227	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	228	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE \| FLAG_NL);
	229
9db2e455 MG	230	break;
9db2e455 MG	231	case 'I':
e75295bb MG	232	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
	233	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	234	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	235	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_NL);
	236
	237	break;
9db2e455	238	default:
e75295bb	239	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX \| FLAG_NL);
9db2e455 MG	240	hexdump(buf, buf_len, "Unknown> ");
	241	break;
	242	}
627e3f33 MG	243	if (debug)
627e3f33 MG	244	fprintf(stderr, "LAN < %s\n", out);
4371275b MG	245
	246	w = write(fd, out, outpos-out);
	247	if (w <= 0) {
	248	perror("write");
	249	return 0;
	250	}
	251
	252	return 1;
9db2e455 MG	253	}
9db2e455 MG	254
e0a7146e	255	static int hmlan_parse_in(int fd, void *data)
9db2e455 MG	256	{
9db2e455 MG	257	struct hmcfgusb_dev *dev = data;
627e3f33	258	uint8_t buf[1025];
e75295bb MG	259	uint8_t out[0x40]; //FIXME!!!
	260	uint8_t *outpos;
	261	uint8_t *inpos;
9db2e455	262	int i;
627e3f33	263	int last;
9db2e455 MG	264	int r;
9db2e455 MG	265
627e3f33 MG	266	memset(buf, 0, sizeof(buf));
	267
	268	r = read(fd, buf, sizeof(buf)-1);
9db2e455	269	if (r > 0) {
627e3f33 MG	270	uint8_t *inend = buf + r;
	271
	272	inpos = buf;
	273
	274	if (debug)
e2572b06	275	fprintf(stderr, "\nLAN > %s", buf);
627e3f33 MG	276
	277	while (inpos < inend) {
	278	uint8_t *instart = inpos;
	279
	280	if ((inpos == '\r') \|\| (inpos == '\n')) {
	281	inpos++;
	282	continue;
9db2e455	283	}
627e3f33 MG	284
627e3f33 MG	285	outpos = out;
9db2e455	286
627e3f33 MG	287	last = inend - inpos;
	288
	289	for (i = 0; i < last; i++) {
	290	if ((inpos[i] == '\r') \|\| (inpos[i] == '\n')) {
	291	last = i;
	292	break;
	293	}
	294	}
	295
	296	if (last == 0)
	297	continue;
	298
	299	memset(out, 0, sizeof(out));
	300	outpos++ = inpos++;
	301
03ca736e	302	switch(*instart) {
627e3f33 MG	303	case 'S':
	304	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	305	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	306	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	307	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	308	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	309	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
	310	break;
	311	default:
	312	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
	313	break;
	314	}
e75295bb	315
33df13be	316	hmcfgusb_send(dev, out, sizeof(out), 1);
627e3f33	317	}
9db2e455 MG	318	} else if (r < 0) {
9db2e455 MG	319	perror("read");
e0a7146e MG	320	return r;
	321	} else {
	322	return 0;
9db2e455	323	}
e0a7146e MG	324
e0a7146e MG	325	return 1;
9db2e455 MG	326	}
9db2e455 MG	327
23d96b59	328	static int comm(int fd_in, int fd_out, int master_socket, int flags)
9db2e455 MG	329	{
9db2e455 MG	330	struct hmcfgusb_dev *dev;
23d96b59 MG	331	uint8_t out[0x40]; //FIXME!!!
23d96b59 MG	332	int poll_timeout = 3600;
9db2e455 MG	333	int quit = 0;
9db2e455 MG	334
627e3f33 MG	335	hmcfgusb_set_debug(debug);
627e3f33 MG	336
e0a7146e	337	dev = hmcfgusb_init(hmlan_format_out, &fd_out);
9db2e455 MG	338	if (!dev) {
9db2e455 MG	339	fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
e0a7146e MG	340	return 0;
	341	}
	342
	343	if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
	344	fprintf(stderr, "Can't add client to pollfd!\n");
	345	hmcfgusb_close(dev);
	346	return 0;
9db2e455 MG	347	}
9db2e455 MG	348
e0a7146e MG	349	if (master_socket >= 0) {
	350	if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
	351	fprintf(stderr, "Can't add master_socket to pollfd!\n");
	352	hmcfgusb_close(dev);
	353	return 0;
	354	}
9db2e455 MG	355	}
9db2e455 MG	356
23d96b59 MG	357	if (flags & FLAG_PERIODIC_WAKEUP)
	358	poll_timeout = 1;
	359
	360	memset(out, 0, sizeof(out));
	361	out[0] = 'K';
e09806b6	362	hmcfgusb_send_null_frame(dev);
23d96b59	363	hmcfgusb_send(dev, out, sizeof(out), 1);
9db2e455 MG	364
	365	while(!quit) {
	366	int fd;
	367
23d96b59	368	fd = hmcfgusb_poll(dev, poll_timeout);
9db2e455	369	if (fd >= 0) {
e0a7146e MG	370	if (fd == master_socket) {
	371	int client;
	372
	373	client = accept(master_socket, NULL, 0);
	374	if (client >= 0) {
	375	shutdown(client, SHUT_RDWR);
	376	close(client);
	377	}
	378	} else {
	379	if (hmlan_parse_in(fd, dev) <= 0) {
	380	quit = 1;
	381	}
	382	}
9db2e455 MG	383	} else if (fd == -1) {
	384	if (errno) {
	385	perror("hmcfgusb_poll");
	386	quit = 1;
23d96b59 MG	387	} else {
	388	/* periodically wakeup the device */
	389	hmcfgusb_send_null_frame(dev);
9db2e455 MG	390	}
	391	}
	392	}
	393
813afd12	394	hmcfgusb_close(dev);
e0a7146e MG	395	return 1;
	396	}
	397
b0bf6ad2 MG	398	void sigterm_handler(int sig)
	399	{
	400	if (unlink(PID_FILE) == -1)
	401	perror("Can't remove PID file");
	402
	403	exit(EXIT_SUCCESS);
	404	}
	405
	406	#define FLAG_DAEMON (1 << 0)
	407	#define FLAG_PID_FILE (1 << 1)
	408
	409	static int socket_server(char *iface, int port, int flags)
e0a7146e	410	{
4371275b	411	struct sigaction sact;
e0a7146e MG	412	struct sockaddr_in sin;
	413	int sock;
	414	int n;
627e3f33 MG	415	pid_t pid;
627e3f33 MG	416
b0bf6ad2 MG	417	if (flags & FLAG_DAEMON) {
	418	FILE *pidfile = NULL;
	419
	420	if (flags & FLAG_PID_FILE) {
e6ab4631 MG	421	int fd;
	422
	423	fd = open(PID_FILE, O_CREAT \| O_EXCL \| O_WRONLY, 0644);
	424	if (fd == -1) {
	425	if (errno == EEXIST) {
	426	pid_t old_pid;
	427	pidfile = fopen(PID_FILE, "r");
	428	if (!pidfile) {
	429	perror("PID file " PID_FILE " already exists, already running?");
	430	exit(EXIT_FAILURE);
	431	}
	432
	433	if (fscanf(pidfile, "%u", &old_pid) != 1) {
	434	fclose(pidfile);
	435	fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
	436	exit(EXIT_FAILURE);
	437	}
	438
	439	fclose(pidfile);
	440
	441	fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
	442	exit(EXIT_FAILURE);
	443	}
	444	perror("Can't create PID file " PID_FILE);
	445	exit(EXIT_FAILURE);
	446	}
b0bf6ad2	447
e6ab4631	448	pidfile = fdopen(fd, "w");
b0bf6ad2	449	if (!pidfile) {
e6ab4631	450	perror("Can't reopen PID file fd");
b0bf6ad2 MG	451	exit(EXIT_FAILURE);
	452	}
	453
	454	memset(&sact, 0, sizeof(sact));
	455	sact.sa_handler = sigterm_handler;
	456
	457	if (sigaction(SIGTERM, &sact, NULL) == -1) {
	458	perror("sigaction(SIGTERM)");
	459	exit(EXIT_FAILURE);
	460	}
	461	}
	462
627e3f33 MG	463	pid = fork();
627e3f33 MG	464	if (pid > 0) {
b0bf6ad2 MG	465	if (pidfile) {
	466	fprintf(pidfile, "%u\n", pid);
	467	fclose(pidfile);
	468	}
	469
627e3f33 MG	470	printf("Daemon with PID %u started!\n", pid);
	471	exit(EXIT_SUCCESS);
	472	} else if (pid < 0) {
	473	perror("fork");
	474	exit(EXIT_FAILURE);
	475	}
b0bf6ad2 MG	476
	477	if (pidfile)
	478	fclose(pidfile);
627e3f33	479	}
e0a7146e	480
4371275b MG	481	memset(&sact, 0, sizeof(sact));
	482	sact.sa_handler = SIG_IGN;
	483
	484	if (sigaction(SIGPIPE, &sact, NULL) == -1) {
b0bf6ad2	485	perror("sigaction(SIGPIPE)");
27f4063e	486	exit(EXIT_FAILURE);
4371275b MG	487	}
4371275b MG	488
e0a7146e MG	489	impersonate_hmlanif = 1;
	490
	491	sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	492	if (sock == -1) {
	493	perror("Can't open socket");
	494	return EXIT_FAILURE;
	495	}
	496
	497	n = 1;
	498	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
	499	perror("Can't set socket options");
	500	return EXIT_FAILURE;
	501	}
	502
	503	memset(&sin, 0, sizeof(sin));
	504	sin.sin_family = AF_INET;
	505	sin.sin_port = htons(port);
4a8a2269 MG	506	if (!iface) {
	507	sin.sin_addr.s_addr = htonl(INADDR_ANY);
	508	} else {
	509	if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
	510	perror("inet_ntop");
	511	return EXIT_FAILURE;
	512	}
	513	}
e0a7146e MG	514
	515	if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
	516	perror("Can't bind socket");
	517	return EXIT_FAILURE;
	518	}
	519
	520	if (listen(sock, 1) == -1) {
	521	perror("Can't listen on socket");
	522	return EXIT_FAILURE;
	523	}
	524
	525	while(1) {
	526	struct sockaddr_in csin;
	527	socklen_t csinlen;
	528	int client;
627e3f33	529	in_addr_t client_addr;
e0a7146e MG	530
	531	memset(&csin, 0, sizeof(csin));
	532	csinlen = sizeof(csin);
	533	client = accept(sock, (struct sockaddr*)&csin, &csinlen);
	534	if (client == -1) {
	535	perror("Couldn't accept client");
	536	continue;
	537	}
	538
627e3f33 MG	539	/* FIXME: getnameinfo... */
	540	client_addr = ntohl(csin.sin_addr.s_addr);
	541
	542	if (verbose) {
	543	printf("Client %d.%d.%d.%d connected!\n",
	544	(client_addr & 0xff000000) >> 24,
	545	(client_addr & 0x00ff0000) >> 16,
	546	(client_addr & 0x0000ff00) >> 8,
	547	(client_addr & 0x000000ff));
	548	}
e0a7146e	549
23d96b59	550	comm(client, client, sock, flags);
e0a7146e MG	551
	552	shutdown(client, SHUT_RDWR);
	553	close(client);
	554
627e3f33 MG	555	if (verbose) {
	556	printf("Connection to %d.%d.%d.%d closed!\n",
	557	(client_addr & 0xff000000) >> 24,
	558	(client_addr & 0x00ff0000) >> 16,
	559	(client_addr & 0x0000ff00) >> 8,
	560	(client_addr & 0x000000ff));
	561	}
e09806b6	562	sleep(1);
e0a7146e MG	563	}
	564
	565	return EXIT_SUCCESS;
	566	}
	567
23d96b59	568	static int interactive_server(int flags)
e0a7146e	569	{
23d96b59	570	if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
e0a7146e	571	return EXIT_FAILURE;
9db2e455 MG	572
	573	return EXIT_SUCCESS;
	574	}
e0a7146e	575
627e3f33 MG	576	void hmlan_syntax(char *prog)
	577	{
	578	fprintf(stderr, "Syntax: %s options\n\n", prog);
	579	fprintf(stderr, "Possible options:\n");
	580	fprintf(stderr, "\t-D\tdebug mode\n");
	581	fprintf(stderr, "\t-d\tdaemon mode\n");
	582	fprintf(stderr, "\t-h\tthis help\n");
	583	fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
4a8a2269	584	fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
b0bf6ad2	585	fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\n");
627e3f33	586	fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
23d96b59	587	fprintf(stderr, "\t-R\twakeup the device (and USB-bus) every second (fix for e.g. Raspberry Pi)\n");
627e3f33 MG	588	fprintf(stderr, "\t-v\tverbose mode\n");
	589
	590	}
	591
e0a7146e MG	592	int main(int argc, char **argv)
e0a7146e MG	593	{
627e3f33	594	int port = 1000;
4a8a2269	595	char *iface = NULL;
627e3f33	596	int interactive = 0;
b0bf6ad2	597	int flags = 0;
627e3f33 MG	598	char *ep;
	599	int opt;
	600
23d96b59	601	while((opt = getopt(argc, argv, "DdhiPp:Rl:v")) != -1) {
627e3f33 MG	602	switch (opt) {
	603	case 'D':
	604	debug = 1;
	605	verbose = 1;
	606	break;
	607	case 'd':
b0bf6ad2	608	flags \|= FLAG_DAEMON;
627e3f33 MG	609	break;
	610	case 'i':
	611	interactive = 1;
	612	break;
b0bf6ad2 MG	613	case 'P':
	614	flags \|= FLAG_PID_FILE;
	615	break;
627e3f33 MG	616	case 'p':
	617	port = strtoul(optarg, &ep, 10);
	618	if (*ep != '\0') {
	619	fprintf(stderr, "Can't parse port!\n");
	620	exit(EXIT_FAILURE);
	621	}
	622	break;
23d96b59 MG	623	case 'R':
	624	flags \|= FLAG_PERIODIC_WAKEUP;
	625	break;
4a8a2269 MG	626	case 'l':
	627	iface = optarg;
	628	break;
627e3f33 MG	629	case 'v':
	630	verbose = 1;
	631	break;
	632	case 'h':
	633	case ':':
	634	case '?':
	635	default:
	636	hmlan_syntax(argv[0]);
	637	exit(EXIT_FAILURE);
	638	break;
	639	}
	640	}
	641
	642	if (interactive) {
23d96b59	643	return interactive_server(flags);
627e3f33	644	} else {
b0bf6ad2	645	return socket_server(iface, port, flags);
627e3f33	646	}
e0a7146e	647	}